ipw2200.c

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/******************************************************************************

  Copyright(c) 2003 - 2006 Intel Corporation. All rights reserved.

  802.11 status code portion of this file from ethereal-0.10.6:
    Copyright 2000, Axis Communications AB
    Ethereal - Network traffic analyzer
    By Gerald Combs <[email protected]>
    Copyright 1998 Gerald Combs

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston, MA  02111-1307, USA.

  The full GNU General Public License is included in this distribution in the
  file called LICENSE.

  Contact Information:
  Intel Linux Wireless <[email protected]>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

******************************************************************************/

#include <linux/sched.h>
#include <linux/slab.h>
#include <net/cfg80211-wext.h>
#include "ipw2200.h"
#include "ipw.h"


#ifndef KBUILD_EXTMOD
#define VK "k"
#else
#define VK
#endif

#ifdef CONFIG_IPW2200_DEBUG
#define VD "d"
#else
#define VD
#endif

#ifdef CONFIG_IPW2200_MONITOR
#define VM "m"
#else
#define VM
#endif

#ifdef CONFIG_IPW2200_PROMISCUOUS
#define VP "p"
#else
#define VP
#endif

#ifdef CONFIG_IPW2200_RADIOTAP
#define VR "r"
#else
#define VR
#endif

#ifdef CONFIG_IPW2200_QOS
#define VQ "q"
#else
#define VQ
#endif

#define IPW2200_VERSION "1.2.2" VK VD VM VP VR VQ
#define DRV_DESCRIPTION "Intel(R) PRO/Wireless 2200/2915 Network Driver"
#define DRV_COPYRIGHT   "Copyright(c) 2003-2006 Intel Corporation"
#define DRV_VERSION     IPW2200_VERSION

#define ETH_P_80211_STATS (ETH_P_80211_RAW + 1)

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("ipw2200-ibss.fw");
#ifdef CONFIG_IPW2200_MONITOR
MODULE_FIRMWARE("ipw2200-sniffer.fw");
#endif
MODULE_FIRMWARE("ipw2200-bss.fw");

static int cmdlog = 0;
static int debug = 0;
static int default_channel = 0;
static int network_mode = 0;

static u32 ipw_debug_level;
static int associate;
static int auto_create = 1;
static int led_support = 1;
static int disable = 0;
static int bt_coexist = 0;
static int hwcrypto = 0;
static int roaming = 1;
static const char ipw_modes[] = {
    'a', 'b', 'g', '?'
};
static int antenna = CFG_SYS_ANTENNA_BOTH;

#ifdef CONFIG_IPW2200_PROMISCUOUS
static int rtap_iface = 0;     /* def: 0 -- do not create rtap interface */
#endif

static struct ieee80211_rate ipw2200_rates[] = {
    { .bitrate = 10 },
    { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
    { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
    { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
    { .bitrate = 60 },
    { .bitrate = 90 },
    { .bitrate = 120 },
    { .bitrate = 180 },
    { .bitrate = 240 },
    { .bitrate = 360 },
    { .bitrate = 480 },
    { .bitrate = 540 }
};

#define ipw2200_a_rates     (ipw2200_rates + 4)
#define ipw2200_num_a_rates 8
#define ipw2200_bg_rates    (ipw2200_rates + 0)
#define ipw2200_num_bg_rates    12

/* Ugly macro to convert literal channel numbers into their mhz equivalents
 * There are certianly some conditions that will break this (like feeding it '30')
 * but they shouldn't arise since nothing talks on channel 30. */
#define ieee80211chan2mhz(x) \
    (((x) <= 14) ? \
    (((x) == 14) ? 2484 : ((x) * 5) + 2407) : \
    ((x) + 1000) * 5)

#ifdef CONFIG_IPW2200_QOS
static int qos_enable = 0;
static int qos_burst_enable = 0;
static int qos_no_ack_mask = 0;
static int burst_duration_CCK = 0;
static int burst_duration_OFDM = 0;

static struct libipw_qos_parameters def_qos_parameters_OFDM = {
    {QOS_TX0_CW_MIN_OFDM, QOS_TX1_CW_MIN_OFDM, QOS_TX2_CW_MIN_OFDM,
     QOS_TX3_CW_MIN_OFDM},
    {QOS_TX0_CW_MAX_OFDM, QOS_TX1_CW_MAX_OFDM, QOS_TX2_CW_MAX_OFDM,
     QOS_TX3_CW_MAX_OFDM},
    {QOS_TX0_AIFS, QOS_TX1_AIFS, QOS_TX2_AIFS, QOS_TX3_AIFS},
    {QOS_TX0_ACM, QOS_TX1_ACM, QOS_TX2_ACM, QOS_TX3_ACM},
    {QOS_TX0_TXOP_LIMIT_OFDM, QOS_TX1_TXOP_LIMIT_OFDM,
     QOS_TX2_TXOP_LIMIT_OFDM, QOS_TX3_TXOP_LIMIT_OFDM}
};

static struct libipw_qos_parameters def_qos_parameters_CCK = {
    {QOS_TX0_CW_MIN_CCK, QOS_TX1_CW_MIN_CCK, QOS_TX2_CW_MIN_CCK,
     QOS_TX3_CW_MIN_CCK},
    {QOS_TX0_CW_MAX_CCK, QOS_TX1_CW_MAX_CCK, QOS_TX2_CW_MAX_CCK,
     QOS_TX3_CW_MAX_CCK},
    {QOS_TX0_AIFS, QOS_TX1_AIFS, QOS_TX2_AIFS, QOS_TX3_AIFS},
    {QOS_TX0_ACM, QOS_TX1_ACM, QOS_TX2_ACM, QOS_TX3_ACM},
    {QOS_TX0_TXOP_LIMIT_CCK, QOS_TX1_TXOP_LIMIT_CCK, QOS_TX2_TXOP_LIMIT_CCK,
     QOS_TX3_TXOP_LIMIT_CCK}
};

static struct libipw_qos_parameters def_parameters_OFDM = {
    {DEF_TX0_CW_MIN_OFDM, DEF_TX1_CW_MIN_OFDM, DEF_TX2_CW_MIN_OFDM,
     DEF_TX3_CW_MIN_OFDM},
    {DEF_TX0_CW_MAX_OFDM, DEF_TX1_CW_MAX_OFDM, DEF_TX2_CW_MAX_OFDM,
     DEF_TX3_CW_MAX_OFDM},
    {DEF_TX0_AIFS, DEF_TX1_AIFS, DEF_TX2_AIFS, DEF_TX3_AIFS},
    {DEF_TX0_ACM, DEF_TX1_ACM, DEF_TX2_ACM, DEF_TX3_ACM},
    {DEF_TX0_TXOP_LIMIT_OFDM, DEF_TX1_TXOP_LIMIT_OFDM,
     DEF_TX2_TXOP_LIMIT_OFDM, DEF_TX3_TXOP_LIMIT_OFDM}
};

static struct libipw_qos_parameters def_parameters_CCK = {
    {DEF_TX0_CW_MIN_CCK, DEF_TX1_CW_MIN_CCK, DEF_TX2_CW_MIN_CCK,
     DEF_TX3_CW_MIN_CCK},
    {DEF_TX0_CW_MAX_CCK, DEF_TX1_CW_MAX_CCK, DEF_TX2_CW_MAX_CCK,
     DEF_TX3_CW_MAX_CCK},
    {DEF_TX0_AIFS, DEF_TX1_AIFS, DEF_TX2_AIFS, DEF_TX3_AIFS},
    {DEF_TX0_ACM, DEF_TX1_ACM, DEF_TX2_ACM, DEF_TX3_ACM},
    {DEF_TX0_TXOP_LIMIT_CCK, DEF_TX1_TXOP_LIMIT_CCK, DEF_TX2_TXOP_LIMIT_CCK,
     DEF_TX3_TXOP_LIMIT_CCK}
};

static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };

static int from_priority_to_tx_queue[] = {
    IPW_TX_QUEUE_1, IPW_TX_QUEUE_2, IPW_TX_QUEUE_2, IPW_TX_QUEUE_1,
    IPW_TX_QUEUE_3, IPW_TX_QUEUE_3, IPW_TX_QUEUE_4, IPW_TX_QUEUE_4
};

static u32 ipw_qos_get_burst_duration(struct ipw_priv *priv);

static int ipw_send_qos_params_command(struct ipw_priv *priv, struct libipw_qos_parameters
                       *qos_param);
static int ipw_send_qos_info_command(struct ipw_priv *priv, struct libipw_qos_information_element
                     *qos_param);
#endif              /* CONFIG_IPW2200_QOS */

static struct iw_statistics *ipw_get_wireless_stats(struct net_device *dev);
static void ipw_remove_current_network(struct ipw_priv *priv);
static void ipw_rx(struct ipw_priv *priv);
static int ipw_queue_tx_reclaim(struct ipw_priv *priv,
                struct clx2_tx_queue *txq, int qindex);
static int ipw_queue_reset(struct ipw_priv *priv);

static int ipw_queue_tx_hcmd(struct ipw_priv *priv, int hcmd, void *buf,
                 int len, int sync);

static void ipw_tx_queue_free(struct ipw_priv *);

static struct ipw_rx_queue *ipw_rx_queue_alloc(struct ipw_priv *);
static void ipw_rx_queue_free(struct ipw_priv *, struct ipw_rx_queue *);
static void ipw_rx_queue_replenish(void *);
static int ipw_up(struct ipw_priv *);
static void ipw_bg_up(struct work_struct *work);
static void ipw_down(struct ipw_priv *);
static void ipw_bg_down(struct work_struct *work);
static int ipw_config(struct ipw_priv *);
static int init_supported_rates(struct ipw_priv *priv,
                struct ipw_supported_rates *prates);
static void ipw_set_hwcrypto_keys(struct ipw_priv *);
static void ipw_send_wep_keys(struct ipw_priv *, int);

static int snprint_line(char *buf, size_t count,
            const u8 * data, u32 len, u32 ofs)
{
    int out, i, j, l;
    char c;

    out = snprintf(buf, count, "%08X", ofs);

    for (l = 0, i = 0; i < 2; i++) {
        out += snprintf(buf + out, count - out, " ");
        for (j = 0; j < 8 && l < len; j++, l++)
            out += snprintf(buf + out, count - out, "%02X ",
                    data[(i * 8 + j)]);
        for (; j < 8; j++)
            out += snprintf(buf + out, count - out, "   ");
    }

    out += snprintf(buf + out, count - out, " ");
    for (l = 0, i = 0; i < 2; i++) {
        out += snprintf(buf + out, count - out, " ");
        for (j = 0; j < 8 && l < len; j++, l++) {
            c = data[(i * 8 + j)];
            if (!isascii(c) || !isprint(c))
                c = '.';

            out += snprintf(buf + out, count - out, "%c", c);
        }

        for (; j < 8; j++)
            out += snprintf(buf + out, count - out, " ");
    }

    return out;
}

static void printk_buf(int level, const u8 * data, u32 len)
{
    char line[81];
    u32 ofs = 0;
    if (!(ipw_debug_level & level))
        return;

    while (len) {
        snprint_line(line, sizeof(line), &data[ofs],
                 min(len, 16U), ofs);
        printk(KERN_DEBUG "%s\n", line);
        ofs += 16;
        len -= min(len, 16U);
    }
}

static int snprintk_buf(u8 * output, size_t size, const u8 * data, size_t len)
{
    size_t out = size;
    u32 ofs = 0;
    int total = 0;

    while (size && len) {
        out = snprint_line(output, size, &data[ofs],
                   min_t(size_t, len, 16U), ofs);

        ofs += 16;
        output += out;
        size -= out;
        len -= min_t(size_t, len, 16U);
        total += out;
    }
    return total;
}

/* alias for 32-bit indirect read (for SRAM/reg above 4K), with debug wrapper */
static u32 _ipw_read_reg32(struct ipw_priv *priv, u32 reg);
#define ipw_read_reg32(a, b) _ipw_read_reg32(a, b)

/* alias for 8-bit indirect read (for SRAM/reg above 4K), with debug wrapper */
static u8 _ipw_read_reg8(struct ipw_priv *ipw, u32 reg);
#define ipw_read_reg8(a, b) _ipw_read_reg8(a, b)

/* 8-bit indirect write (for SRAM/reg above 4K), with debug wrapper */
static void _ipw_write_reg8(struct ipw_priv *priv, u32 reg, u8 value);
static inline void ipw_write_reg8(struct ipw_priv *a, u32 b, u8 c)
{
    IPW_DEBUG_IO("%s %d: write_indirect8(0x%08X, 0x%08X)\n", __FILE__,
             __LINE__, (u32) (b), (u32) (c));
    _ipw_write_reg8(a, b, c);
}

/* 16-bit indirect write (for SRAM/reg above 4K), with debug wrapper */
static void _ipw_write_reg16(struct ipw_priv *priv, u32 reg, u16 value);
static inline void ipw_write_reg16(struct ipw_priv *a, u32 b, u16 c)
{
    IPW_DEBUG_IO("%s %d: write_indirect16(0x%08X, 0x%08X)\n", __FILE__,
             __LINE__, (u32) (b), (u32) (c));
    _ipw_write_reg16(a, b, c);
}

/* 32-bit indirect write (for SRAM/reg above 4K), with debug wrapper */
static void _ipw_write_reg32(struct ipw_priv *priv, u32 reg, u32 value);
static inline void ipw_write_reg32(struct ipw_priv *a, u32 b, u32 c)
{
    IPW_DEBUG_IO("%s %d: write_indirect32(0x%08X, 0x%08X)\n", __FILE__,
             __LINE__, (u32) (b), (u32) (c));
    _ipw_write_reg32(a, b, c);
}

/* 8-bit direct write (low 4K) */
static inline void _ipw_write8(struct ipw_priv *ipw, unsigned long ofs,
        u8 val)
{
    writeb(val, ipw->hw_base + ofs);
}

/* 8-bit direct write (for low 4K of SRAM/regs), with debug wrapper */
#define ipw_write8(ipw, ofs, val) do { \
    IPW_DEBUG_IO("%s %d: write_direct8(0x%08X, 0x%08X)\n", __FILE__, \
            __LINE__, (u32)(ofs), (u32)(val)); \
    _ipw_write8(ipw, ofs, val); \
} while (0)

/* 16-bit direct write (low 4K) */
static inline void _ipw_write16(struct ipw_priv *ipw, unsigned long ofs,
        u16 val)
{
    writew(val, ipw->hw_base + ofs);
}

/* 16-bit direct write (for low 4K of SRAM/regs), with debug wrapper */
#define ipw_write16(ipw, ofs, val) do { \
    IPW_DEBUG_IO("%s %d: write_direct16(0x%08X, 0x%08X)\n", __FILE__, \
            __LINE__, (u32)(ofs), (u32)(val)); \
    _ipw_write16(ipw, ofs, val); \
} while (0)

/* 32-bit direct write (low 4K) */
static inline void _ipw_write32(struct ipw_priv *ipw, unsigned long ofs,
        u32 val)
{
    writel(val, ipw->hw_base + ofs);
}

/* 32-bit direct write (for low 4K of SRAM/regs), with debug wrapper */
#define ipw_write32(ipw, ofs, val) do { \
    IPW_DEBUG_IO("%s %d: write_direct32(0x%08X, 0x%08X)\n", __FILE__, \
            __LINE__, (u32)(ofs), (u32)(val)); \
    _ipw_write32(ipw, ofs, val); \
} while (0)

/* 8-bit direct read (low 4K) */
static inline u8 _ipw_read8(struct ipw_priv *ipw, unsigned long ofs)
{
    return readb(ipw->hw_base + ofs);
}

/* alias to 8-bit direct read (low 4K of SRAM/regs), with debug wrapper */
#define ipw_read8(ipw, ofs) ({ \
    IPW_DEBUG_IO("%s %d: read_direct8(0x%08X)\n", __FILE__, __LINE__, \
            (u32)(ofs)); \
    _ipw_read8(ipw, ofs); \
})

/* 16-bit direct read (low 4K) */
static inline u16 _ipw_read16(struct ipw_priv *ipw, unsigned long ofs)
{
    return readw(ipw->hw_base + ofs);
}

/* alias to 16-bit direct read (low 4K of SRAM/regs), with debug wrapper */
#define ipw_read16(ipw, ofs) ({ \
    IPW_DEBUG_IO("%s %d: read_direct16(0x%08X)\n", __FILE__, __LINE__, \
            (u32)(ofs)); \
    _ipw_read16(ipw, ofs); \
})

/* 32-bit direct read (low 4K) */
static inline u32 _ipw_read32(struct ipw_priv *ipw, unsigned long ofs)
{
    return readl(ipw->hw_base + ofs);
}

/* alias to 32-bit direct read (low 4K of SRAM/regs), with debug wrapper */
#define ipw_read32(ipw, ofs) ({ \
    IPW_DEBUG_IO("%s %d: read_direct32(0x%08X)\n", __FILE__, __LINE__, \
            (u32)(ofs)); \
    _ipw_read32(ipw, ofs); \
})

static void _ipw_read_indirect(struct ipw_priv *, u32, u8 *, int);
/* alias to multi-byte read (SRAM/regs above 4K), with debug wrapper */
#define ipw_read_indirect(a, b, c, d) ({ \
    IPW_DEBUG_IO("%s %d: read_indirect(0x%08X) %u bytes\n", __FILE__, \
            __LINE__, (u32)(b), (u32)(d)); \
    _ipw_read_indirect(a, b, c, d); \
})

/* alias to multi-byte read (SRAM/regs above 4K), with debug wrapper */
static void _ipw_write_indirect(struct ipw_priv *priv, u32 addr, u8 * data,
                int num);
#define ipw_write_indirect(a, b, c, d) do { \
    IPW_DEBUG_IO("%s %d: write_indirect(0x%08X) %u bytes\n", __FILE__, \
            __LINE__, (u32)(b), (u32)(d)); \
    _ipw_write_indirect(a, b, c, d); \
} while (0)

/* 32-bit indirect write (above 4K) */
static void _ipw_write_reg32(struct ipw_priv *priv, u32 reg, u32 value)
{
    IPW_DEBUG_IO(" %p : reg = 0x%8X : value = 0x%8X\n", priv, reg, value);
    _ipw_write32(priv, IPW_INDIRECT_ADDR, reg);
    _ipw_write32(priv, IPW_INDIRECT_DATA, value);
}

/* 8-bit indirect write (above 4K) */
static void _ipw_write_reg8(struct ipw_priv *priv, u32 reg, u8 value)
{
    u32 aligned_addr = reg & IPW_INDIRECT_ADDR_MASK;    /* dword align */
    u32 dif_len = reg - aligned_addr;

    IPW_DEBUG_IO(" reg = 0x%8X : value = 0x%8X\n", reg, value);
    _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
    _ipw_write8(priv, IPW_INDIRECT_DATA + dif_len, value);
}

/* 16-bit indirect write (above 4K) */
static void _ipw_write_reg16(struct ipw_priv *priv, u32 reg, u16 value)
{
    u32 aligned_addr = reg & IPW_INDIRECT_ADDR_MASK;    /* dword align */
    u32 dif_len = (reg - aligned_addr) & (~0x1ul);

    IPW_DEBUG_IO(" reg = 0x%8X : value = 0x%8X\n", reg, value);
    _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
    _ipw_write16(priv, IPW_INDIRECT_DATA + dif_len, value);
}

/* 8-bit indirect read (above 4K) */
static u8 _ipw_read_reg8(struct ipw_priv *priv, u32 reg)
{
    u32 word;
    _ipw_write32(priv, IPW_INDIRECT_ADDR, reg & IPW_INDIRECT_ADDR_MASK);
    IPW_DEBUG_IO(" reg = 0x%8X :\n", reg);
    word = _ipw_read32(priv, IPW_INDIRECT_DATA);
    return (word >> ((reg & 0x3) * 8)) & 0xff;
}

/* 32-bit indirect read (above 4K) */
static u32 _ipw_read_reg32(struct ipw_priv *priv, u32 reg)
{
    u32 value;

    IPW_DEBUG_IO("%p : reg = 0x%08x\n", priv, reg);

    _ipw_write32(priv, IPW_INDIRECT_ADDR, reg);
    value = _ipw_read32(priv, IPW_INDIRECT_DATA);
    IPW_DEBUG_IO(" reg = 0x%4X : value = 0x%4x\n", reg, value);
    return value;
}

/* General purpose, no alignment requirement, iterative (multi-byte) read, */
/*    for area above 1st 4K of SRAM/reg space */
static void _ipw_read_indirect(struct ipw_priv *priv, u32 addr, u8 * buf,
                   int num)
{
    u32 aligned_addr = addr & IPW_INDIRECT_ADDR_MASK;   /* dword align */
    u32 dif_len = addr - aligned_addr;
    u32 i;

    IPW_DEBUG_IO("addr = %i, buf = %p, num = %i\n", addr, buf, num);

    if (num <= 0) {
        return;
    }

    /* Read the first dword (or portion) byte by byte */
    if (unlikely(dif_len)) {
        _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
        /* Start reading at aligned_addr + dif_len */
        for (i = dif_len; ((i < 4) && (num > 0)); i++, num--)
            *buf++ = _ipw_read8(priv, IPW_INDIRECT_DATA + i);
        aligned_addr += 4;
    }

    /* Read all of the middle dwords as dwords, with auto-increment */
    _ipw_write32(priv, IPW_AUTOINC_ADDR, aligned_addr);
    for (; num >= 4; buf += 4, aligned_addr += 4, num -= 4)
        *(u32 *) buf = _ipw_read32(priv, IPW_AUTOINC_DATA);

    /* Read the last dword (or portion) byte by byte */
    if (unlikely(num)) {
        _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
        for (i = 0; num > 0; i++, num--)
            *buf++ = ipw_read8(priv, IPW_INDIRECT_DATA + i);
    }
}

/* General purpose, no alignment requirement, iterative (multi-byte) write, */
/*    for area above 1st 4K of SRAM/reg space */
static void _ipw_write_indirect(struct ipw_priv *priv, u32 addr, u8 * buf,
                int num)
{
    u32 aligned_addr = addr & IPW_INDIRECT_ADDR_MASK;   /* dword align */
    u32 dif_len = addr - aligned_addr;
    u32 i;

    IPW_DEBUG_IO("addr = %i, buf = %p, num = %i\n", addr, buf, num);

    if (num <= 0) {
        return;
    }

    /* Write the first dword (or portion) byte by byte */
    if (unlikely(dif_len)) {
        _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
        /* Start writing at aligned_addr + dif_len */
        for (i = dif_len; ((i < 4) && (num > 0)); i++, num--, buf++)
            _ipw_write8(priv, IPW_INDIRECT_DATA + i, *buf);
        aligned_addr += 4;
    }

    /* Write all of the middle dwords as dwords, with auto-increment */
    _ipw_write32(priv, IPW_AUTOINC_ADDR, aligned_addr);
    for (; num >= 4; buf += 4, aligned_addr += 4, num -= 4)
        _ipw_write32(priv, IPW_AUTOINC_DATA, *(u32 *) buf);

    /* Write the last dword (or portion) byte by byte */
    if (unlikely(num)) {
        _ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
        for (i = 0; num > 0; i++, num--, buf++)
            _ipw_write8(priv, IPW_INDIRECT_DATA + i, *buf);
    }
}

/* General purpose, no alignment requirement, iterative (multi-byte) write, */
/*    for 1st 4K of SRAM/regs space */
static void ipw_write_direct(struct ipw_priv *priv, u32 addr, void *buf,
                 int num)
{
    memcpy_toio((priv->hw_base + addr), buf, num);
}

/* Set bit(s) in low 4K of SRAM/regs */
static inline void ipw_set_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
    ipw_write32(priv, reg, ipw_read32(priv, reg) | mask);
}

/* Clear bit(s) in low 4K of SRAM/regs */
static inline void ipw_clear_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
    ipw_write32(priv, reg, ipw_read32(priv, reg) & ~mask);
}

static inline void __ipw_enable_interrupts(struct ipw_priv *priv)
{
    if (priv->status & STATUS_INT_ENABLED)
        return;
    priv->status |= STATUS_INT_ENABLED;
    ipw_write32(priv, IPW_INTA_MASK_R, IPW_INTA_MASK_ALL);
}

static inline void __ipw_disable_interrupts(struct ipw_priv *priv)
{
    if (!(priv->status & STATUS_INT_ENABLED))
        return;
    priv->status &= ~STATUS_INT_ENABLED;
    ipw_write32(priv, IPW_INTA_MASK_R, ~IPW_INTA_MASK_ALL);
}

static inline void ipw_enable_interrupts(struct ipw_priv *priv)
{
    unsigned long flags;

    spin_lock_irqsave(&priv->irq_lock, flags);
    __ipw_enable_interrupts(priv);
    spin_unlock_irqrestore(&priv->irq_lock, flags);
}

static inline void ipw_disable_interrupts(struct ipw_priv *priv)
{
    unsigned long flags;

    spin_lock_irqsave(&priv->irq_lock, flags);
    __ipw_disable_interrupts(priv);
    spin_unlock_irqrestore(&priv->irq_lock, flags);
}

static char *ipw_error_desc(u32 val)
{
    switch (val) {
    case IPW_FW_ERROR_OK:
        return "ERROR_OK";
    case IPW_FW_ERROR_FAIL:
        return "ERROR_FAIL";
    case IPW_FW_ERROR_MEMORY_UNDERFLOW:
        return "MEMORY_UNDERFLOW";
    case IPW_FW_ERROR_MEMORY_OVERFLOW:
        return "MEMORY_OVERFLOW";
    case IPW_FW_ERROR_BAD_PARAM:
        return "BAD_PARAM";
    case IPW_FW_ERROR_BAD_CHECKSUM:
        return "BAD_CHECKSUM";
    case IPW_FW_ERROR_NMI_INTERRUPT:
        return "NMI_INTERRUPT";
    case IPW_FW_ERROR_BAD_DATABASE:
        return "BAD_DATABASE";
    case IPW_FW_ERROR_ALLOC_FAIL:
        return "ALLOC_FAIL";
    case IPW_FW_ERROR_DMA_UNDERRUN:
        return "DMA_UNDERRUN";
    case IPW_FW_ERROR_DMA_STATUS:
        return "DMA_STATUS";
    case IPW_FW_ERROR_DINO_ERROR:
        return "DINO_ERROR";
    case IPW_FW_ERROR_EEPROM_ERROR:
        return "EEPROM_ERROR";
    case IPW_FW_ERROR_SYSASSERT:
        return "SYSASSERT";
    case IPW_FW_ERROR_FATAL_ERROR:
        return "FATAL_ERROR";
    default:
        return "UNKNOWN_ERROR";
    }
}

static void ipw_dump_error_log(struct ipw_priv *priv,
                   struct ipw_fw_error *error)
{
    u32 i;

    if (!error) {
        IPW_ERROR("Error allocating and capturing error log.  "
              "Nothing to dump.\n");
        return;
    }

    IPW_ERROR("Start IPW Error Log Dump:\n");
    IPW_ERROR("Status: 0x%08X, Config: %08X\n",
          error->status, error->config);

    for (i = 0; i < error->elem_len; i++)
        IPW_ERROR("%s %i 0x%08x  0x%08x  0x%08x  0x%08x  0x%08x\n",
              ipw_error_desc(error->elem[i].desc),
              error->elem[i].time,
              error->elem[i].blink1,
              error->elem[i].blink2,
              error->elem[i].link1,
              error->elem[i].link2, error->elem[i].data);
    for (i = 0; i < error->log_len; i++)
        IPW_ERROR("%i\t0x%08x\t%i\n",
              error->log[i].time,
              error->log[i].data, error->log[i].event);
}

static inline int ipw_is_init(struct ipw_priv *priv)
{
    return (priv->status & STATUS_INIT) ? 1 : 0;
}

static int ipw_get_ordinal(struct ipw_priv *priv, u32 ord, void *val, u32 * len)
{
    u32 addr, field_info, field_len, field_count, total_len;

    IPW_DEBUG_ORD("ordinal = %i\n", ord);

    if (!priv || !val || !len) {
        IPW_DEBUG_ORD("Invalid argument\n");
        return -EINVAL;
    }

    /* verify device ordinal tables have been initialized */
    if (!priv->table0_addr || !priv->table1_addr || !priv->table2_addr) {
        IPW_DEBUG_ORD("Access ordinals before initialization\n");
        return -EINVAL;
    }

    switch (IPW_ORD_TABLE_ID_MASK & ord) {
    case IPW_ORD_TABLE_0_MASK:
        /*
         * TABLE 0: Direct access to a table of 32 bit values
         *
         * This is a very simple table with the data directly
         * read from the table
         */

        /* remove the table id from the ordinal */
        ord &= IPW_ORD_TABLE_VALUE_MASK;

        /* boundary check */
        if (ord > priv->table0_len) {
            IPW_DEBUG_ORD("ordinal value (%i) longer then "
                      "max (%i)\n", ord, priv->table0_len);
            return -EINVAL;
        }

        /* verify we have enough room to store the value */
        if (*len < sizeof(u32)) {
            IPW_DEBUG_ORD("ordinal buffer length too small, "
                      "need %zd\n", sizeof(u32));
            return -EINVAL;
        }

        IPW_DEBUG_ORD("Reading TABLE0[%i] from offset 0x%08x\n",
                  ord, priv->table0_addr + (ord << 2));

        *len = sizeof(u32);
        ord <<= 2;
        *((u32 *) val) = ipw_read32(priv, priv->table0_addr + ord);
        break;

    case IPW_ORD_TABLE_1_MASK:
        /*
         * TABLE 1: Indirect access to a table of 32 bit values
         *
         * This is a fairly large table of u32 values each
         * representing starting addr for the data (which is
         * also a u32)
         */

        /* remove the table id from the ordinal */
        ord &= IPW_ORD_TABLE_VALUE_MASK;

        /* boundary check */
        if (ord > priv->table1_len) {
            IPW_DEBUG_ORD("ordinal value too long\n");
            return -EINVAL;
        }

        /* verify we have enough room to store the value */
        if (*len < sizeof(u32)) {
            IPW_DEBUG_ORD("ordinal buffer length too small, "
                      "need %zd\n", sizeof(u32));
            return -EINVAL;
        }

        *((u32 *) val) =
            ipw_read_reg32(priv, (priv->table1_addr + (ord << 2)));
        *len = sizeof(u32);
        break;

    case IPW_ORD_TABLE_2_MASK:
        /*
         * TABLE 2: Indirect access to a table of variable sized values
         *
         * This table consist of six values, each containing
         *     - dword containing the starting offset of the data
         *     - dword containing the lengh in the first 16bits
         *       and the count in the second 16bits
         */

        /* remove the table id from the ordinal */
        ord &= IPW_ORD_TABLE_VALUE_MASK;

        /* boundary check */
        if (ord > priv->table2_len) {
            IPW_DEBUG_ORD("ordinal value too long\n");
            return -EINVAL;
        }

        /* get the address of statistic */
        addr = ipw_read_reg32(priv, priv->table2_addr + (ord << 3));

        /* get the second DW of statistics ;
         * two 16-bit words - first is length, second is count */
        field_info =
            ipw_read_reg32(priv,
                   priv->table2_addr + (ord << 3) +
                   sizeof(u32));

        /* get each entry length */
        field_len = *((u16 *) & field_info);

        /* get number of entries */
        field_count = *(((u16 *) & field_info) + 1);

        /* abort if not enough memory */
        total_len = field_len * field_count;
        if (total_len > *len) {
            *len = total_len;
            return -EINVAL;
        }

        *len = total_len;
        if (!total_len)
            return 0;

        IPW_DEBUG_ORD("addr = 0x%08x, total_len = %i, "
                  "field_info = 0x%08x\n",
                  addr, total_len, field_info);
        ipw_read_indirect(priv, addr, val, total_len);
        break;

    default:
        IPW_DEBUG_ORD("Invalid ordinal!\n");
        return -EINVAL;

    }

    return 0;
}

static void ipw_init_ordinals(struct ipw_priv *priv)
{
    priv->table0_addr = IPW_ORDINALS_TABLE_LOWER;
    priv->table0_len = ipw_read32(priv, priv->table0_addr);

    IPW_DEBUG_ORD("table 0 offset at 0x%08x, len = %i\n",
              priv->table0_addr, priv->table0_len);

    priv->table1_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_1);
    priv->table1_len = ipw_read_reg32(priv, priv->table1_addr);

    IPW_DEBUG_ORD("table 1 offset at 0x%08x, len = %i\n",
              priv->table1_addr, priv->table1_len);

    priv->table2_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_2);
    priv->table2_len = ipw_read_reg32(priv, priv->table2_addr);
    priv->table2_len &= 0x0000ffff; /* use first two bytes */

    IPW_DEBUG_ORD("table 2 offset at 0x%08x, len = %i\n",
              priv->table2_addr, priv->table2_len);

}

static u32 ipw_register_toggle(u32 reg)
{
    reg &= ~IPW_START_STANDBY;
    if (reg & IPW_GATE_ODMA)
        reg &= ~IPW_GATE_ODMA;
    if (reg & IPW_GATE_IDMA)
        reg &= ~IPW_GATE_IDMA;
    if (reg & IPW_GATE_ADMA)
        reg &= ~IPW_GATE_ADMA;
    return reg;
}

/*
 * LED behavior:
 * - On radio ON, turn on any LEDs that require to be on during start
 * - On initialization, start unassociated blink
 * - On association, disable unassociated blink
 * - On disassociation, start unassociated blink
 * - On radio OFF, turn off any LEDs started during radio on
 *
 */
#define LD_TIME_LINK_ON msecs_to_jiffies(300)
#define LD_TIME_LINK_OFF msecs_to_jiffies(2700)
#define LD_TIME_ACT_ON msecs_to_jiffies(250)

static void ipw_led_link_on(struct ipw_priv *priv)
{
    unsigned long flags;
    u32 led;

    /* If configured to not use LEDs, or nic_type is 1,
     * then we don't toggle a LINK led */
    if (priv->config & CFG_NO_LED || priv->nic_type == EEPROM_NIC_TYPE_1)
        return;

    spin_lock_irqsave(&priv->lock, flags);

    if (!(priv->status & STATUS_RF_KILL_MASK) &&
        !(priv->status & STATUS_LED_LINK_ON)) {
        IPW_DEBUG_LED("Link LED On\n");
        led = ipw_read_reg32(priv, IPW_EVENT_REG);
        led |= priv->led_association_on;

        led = ipw_register_toggle(led);

        IPW_DEBUG_LED("Reg: 0x%08X\n", led);
        ipw_write_reg32(priv, IPW_EVENT_REG, led);

        priv->status |= STATUS_LED_LINK_ON;

        /* If we aren't associated, schedule turning the LED off */
        if (!(priv->status & STATUS_ASSOCIATED))
            schedule_delayed_work(&priv->led_link_off,
                          LD_TIME_LINK_ON);
    }

    spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_link_on(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, led_link_on.work);
    mutex_lock(&priv->mutex);
    ipw_led_link_on(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_led_link_off(struct ipw_priv *priv)
{
    unsigned long flags;
    u32 led;

    /* If configured not to use LEDs, or nic type is 1,
     * then we don't goggle the LINK led. */
    if (priv->config & CFG_NO_LED || priv->nic_type == EEPROM_NIC_TYPE_1)
        return;

    spin_lock_irqsave(&priv->lock, flags);

    if (priv->status & STATUS_LED_LINK_ON) {
        led = ipw_read_reg32(priv, IPW_EVENT_REG);
        led &= priv->led_association_off;
        led = ipw_register_toggle(led);

        IPW_DEBUG_LED("Reg: 0x%08X\n", led);
        ipw_write_reg32(priv, IPW_EVENT_REG, led);

        IPW_DEBUG_LED("Link LED Off\n");

        priv->status &= ~STATUS_LED_LINK_ON;

        /* If we aren't associated and the radio is on, schedule
         * turning the LED on (blink while unassociated) */
        if (!(priv->status & STATUS_RF_KILL_MASK) &&
            !(priv->status & STATUS_ASSOCIATED))
            schedule_delayed_work(&priv->led_link_on,
                          LD_TIME_LINK_OFF);

    }

    spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_link_off(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, led_link_off.work);
    mutex_lock(&priv->mutex);
    ipw_led_link_off(priv);
    mutex_unlock(&priv->mutex);
}

static void __ipw_led_activity_on(struct ipw_priv *priv)
{
    u32 led;

    if (priv->config & CFG_NO_LED)
        return;

    if (priv->status & STATUS_RF_KILL_MASK)
        return;

    if (!(priv->status & STATUS_LED_ACT_ON)) {
        led = ipw_read_reg32(priv, IPW_EVENT_REG);
        led |= priv->led_activity_on;

        led = ipw_register_toggle(led);

        IPW_DEBUG_LED("Reg: 0x%08X\n", led);
        ipw_write_reg32(priv, IPW_EVENT_REG, led);

        IPW_DEBUG_LED("Activity LED On\n");

        priv->status |= STATUS_LED_ACT_ON;

        cancel_delayed_work(&priv->led_act_off);
        schedule_delayed_work(&priv->led_act_off, LD_TIME_ACT_ON);
    } else {
        /* Reschedule LED off for full time period */
        cancel_delayed_work(&priv->led_act_off);
        schedule_delayed_work(&priv->led_act_off, LD_TIME_ACT_ON);
    }
}

#if 0
void ipw_led_activity_on(struct ipw_priv *priv)
{
    unsigned long flags;
    spin_lock_irqsave(&priv->lock, flags);
    __ipw_led_activity_on(priv);
    spin_unlock_irqrestore(&priv->lock, flags);
}
#endif  /*  0  */

static void ipw_led_activity_off(struct ipw_priv *priv)
{
    unsigned long flags;
    u32 led;

    if (priv->config & CFG_NO_LED)
        return;

    spin_lock_irqsave(&priv->lock, flags);

    if (priv->status & STATUS_LED_ACT_ON) {
        led = ipw_read_reg32(priv, IPW_EVENT_REG);
        led &= priv->led_activity_off;

        led = ipw_register_toggle(led);

        IPW_DEBUG_LED("Reg: 0x%08X\n", led);
        ipw_write_reg32(priv, IPW_EVENT_REG, led);

        IPW_DEBUG_LED("Activity LED Off\n");

        priv->status &= ~STATUS_LED_ACT_ON;
    }

    spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_activity_off(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, led_act_off.work);
    mutex_lock(&priv->mutex);
    ipw_led_activity_off(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_led_band_on(struct ipw_priv *priv)
{
    unsigned long flags;
    u32 led;

    /* Only nic type 1 supports mode LEDs */
    if (priv->config & CFG_NO_LED ||
        priv->nic_type != EEPROM_NIC_TYPE_1 || !priv->assoc_network)
        return;

    spin_lock_irqsave(&priv->lock, flags);

    led = ipw_read_reg32(priv, IPW_EVENT_REG);
    if (priv->assoc_network->mode == IEEE_A) {
        led |= priv->led_ofdm_on;
        led &= priv->led_association_off;
        IPW_DEBUG_LED("Mode LED On: 802.11a\n");
    } else if (priv->assoc_network->mode == IEEE_G) {
        led |= priv->led_ofdm_on;
        led |= priv->led_association_on;
        IPW_DEBUG_LED("Mode LED On: 802.11g\n");
    } else {
        led &= priv->led_ofdm_off;
        led |= priv->led_association_on;
        IPW_DEBUG_LED("Mode LED On: 802.11b\n");
    }

    led = ipw_register_toggle(led);

    IPW_DEBUG_LED("Reg: 0x%08X\n", led);
    ipw_write_reg32(priv, IPW_EVENT_REG, led);

    spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_led_band_off(struct ipw_priv *priv)
{
    unsigned long flags;
    u32 led;

    /* Only nic type 1 supports mode LEDs */
    if (priv->config & CFG_NO_LED || priv->nic_type != EEPROM_NIC_TYPE_1)
        return;

    spin_lock_irqsave(&priv->lock, flags);

    led = ipw_read_reg32(priv, IPW_EVENT_REG);
    led &= priv->led_ofdm_off;
    led &= priv->led_association_off;

    led = ipw_register_toggle(led);

    IPW_DEBUG_LED("Reg: 0x%08X\n", led);
    ipw_write_reg32(priv, IPW_EVENT_REG, led);

    spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_led_radio_on(struct ipw_priv *priv)
{
    ipw_led_link_on(priv);
}

static void ipw_led_radio_off(struct ipw_priv *priv)
{
    ipw_led_activity_off(priv);
    ipw_led_link_off(priv);
}

static void ipw_led_link_up(struct ipw_priv *priv)
{
    /* Set the Link Led on for all nic types */
    ipw_led_link_on(priv);
}

static void ipw_led_link_down(struct ipw_priv *priv)
{
    ipw_led_activity_off(priv);
    ipw_led_link_off(priv);

    if (priv->status & STATUS_RF_KILL_MASK)
        ipw_led_radio_off(priv);
}

static void ipw_led_init(struct ipw_priv *priv)
{
    priv->nic_type = priv->eeprom[EEPROM_NIC_TYPE];

    /* Set the default PINs for the link and activity leds */
    priv->led_activity_on = IPW_ACTIVITY_LED;
    priv->led_activity_off = ~(IPW_ACTIVITY_LED);

    priv->led_association_on = IPW_ASSOCIATED_LED;
    priv->led_association_off = ~(IPW_ASSOCIATED_LED);

    /* Set the default PINs for the OFDM leds */
    priv->led_ofdm_on = IPW_OFDM_LED;
    priv->led_ofdm_off = ~(IPW_OFDM_LED);

    switch (priv->nic_type) {
    case EEPROM_NIC_TYPE_1:
        /* In this NIC type, the LEDs are reversed.... */
        priv->led_activity_on = IPW_ASSOCIATED_LED;
        priv->led_activity_off = ~(IPW_ASSOCIATED_LED);
        priv->led_association_on = IPW_ACTIVITY_LED;
        priv->led_association_off = ~(IPW_ACTIVITY_LED);

        if (!(priv->config & CFG_NO_LED))
            ipw_led_band_on(priv);

        /* And we don't blink link LEDs for this nic, so
         * just return here */
        return;

    case EEPROM_NIC_TYPE_3:
    case EEPROM_NIC_TYPE_2:
    case EEPROM_NIC_TYPE_4:
    case EEPROM_NIC_TYPE_0:
        break;

    default:
        IPW_DEBUG_INFO("Unknown NIC type from EEPROM: %d\n",
                   priv->nic_type);
        priv->nic_type = EEPROM_NIC_TYPE_0;
        break;
    }

    if (!(priv->config & CFG_NO_LED)) {
        if (priv->status & STATUS_ASSOCIATED)
            ipw_led_link_on(priv);
        else
            ipw_led_link_off(priv);
    }
}

static void ipw_led_shutdown(struct ipw_priv *priv)
{
    ipw_led_activity_off(priv);
    ipw_led_link_off(priv);
    ipw_led_band_off(priv);
    cancel_delayed_work(&priv->led_link_on);
    cancel_delayed_work(&priv->led_link_off);
    cancel_delayed_work(&priv->led_act_off);
}

/*
 * The following adds a new attribute to the sysfs representation
 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/ipw/)
 * used for controlling the debug level.
 *
 * See the level definitions in ipw for details.
 */
static ssize_t show_debug_level(struct device_driver *d, char *buf)
{
    return sprintf(buf, "0x%08X\n", ipw_debug_level);
}

static ssize_t store_debug_level(struct device_driver *d, const char *buf,
                 size_t count)
{
    char *p = (char *)buf;
    u32 val;

    if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
        p++;
        if (p[0] == 'x' || p[0] == 'X')
            p++;
        val = simple_strtoul(p, &p, 16);
    } else
        val = simple_strtoul(p, &p, 10);
    if (p == buf)
        printk(KERN_INFO DRV_NAME
               ": %s is not in hex or decimal form.\n", buf);
    else
        ipw_debug_level = val;

    return strnlen(buf, count);
}

static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
           show_debug_level, store_debug_level);

static inline u32 ipw_get_event_log_len(struct ipw_priv *priv)
{
    /* length = 1st dword in log */
    return ipw_read_reg32(priv, ipw_read32(priv, IPW_EVENT_LOG));
}

static void ipw_capture_event_log(struct ipw_priv *priv,
                  u32 log_len, struct ipw_event *log)
{
    u32 base;

    if (log_len) {
        base = ipw_read32(priv, IPW_EVENT_LOG);
        ipw_read_indirect(priv, base + sizeof(base) + sizeof(u32),
                  (u8 *) log, sizeof(*log) * log_len);
    }
}

static struct ipw_fw_error *ipw_alloc_error_log(struct ipw_priv *priv)
{
    struct ipw_fw_error *error;
    u32 log_len = ipw_get_event_log_len(priv);
    u32 base = ipw_read32(priv, IPW_ERROR_LOG);
    u32 elem_len = ipw_read_reg32(priv, base);

    error = kmalloc(sizeof(*error) +
            sizeof(*error->elem) * elem_len +
            sizeof(*error->log) * log_len, GFP_ATOMIC);
    if (!error) {
        IPW_ERROR("Memory allocation for firmware error log "
              "failed.\n");
        return NULL;
    }
    error->jiffies = jiffies;
    error->status = priv->status;
    error->config = priv->config;
    error->elem_len = elem_len;
    error->log_len = log_len;
    error->elem = (struct ipw_error_elem *)error->payload;
    error->log = (struct ipw_event *)(error->elem + elem_len);

    ipw_capture_event_log(priv, log_len, error->log);

    if (elem_len)
        ipw_read_indirect(priv, base + sizeof(base), (u8 *) error->elem,
                  sizeof(*error->elem) * elem_len);

    return error;
}

static ssize_t show_event_log(struct device *d,
                  struct device_attribute *attr, char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    u32 log_len = ipw_get_event_log_len(priv);
    u32 log_size;
    struct ipw_event *log;
    u32 len = 0, i;

    /* not using min() because of its strict type checking */
    log_size = PAGE_SIZE / sizeof(*log) > log_len ?
            sizeof(*log) * log_len : PAGE_SIZE;
    log = kzalloc(log_size, GFP_KERNEL);
    if (!log) {
        IPW_ERROR("Unable to allocate memory for log\n");
        return 0;
    }
    log_len = log_size / sizeof(*log);
    ipw_capture_event_log(priv, log_len, log);

    len += snprintf(buf + len, PAGE_SIZE - len, "%08X", log_len);
    for (i = 0; i < log_len; i++)
        len += snprintf(buf + len, PAGE_SIZE - len,
                "\n%08X%08X%08X",
                log[i].time, log[i].event, log[i].data);
    len += snprintf(buf + len, PAGE_SIZE - len, "\n");
    kfree(log);
    return len;
}

static DEVICE_ATTR(event_log, S_IRUGO, show_event_log, NULL);

static ssize_t show_error(struct device *d,
              struct device_attribute *attr, char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    u32 len = 0, i;
    if (!priv->error)
        return 0;
    len += snprintf(buf + len, PAGE_SIZE - len,
            "%08lX%08X%08X%08X",
            priv->error->jiffies,
            priv->error->status,
            priv->error->config, priv->error->elem_len);
    for (i = 0; i < priv->error->elem_len; i++)
        len += snprintf(buf + len, PAGE_SIZE - len,
                "\n%08X%08X%08X%08X%08X%08X%08X",
                priv->error->elem[i].time,
                priv->error->elem[i].desc,
                priv->error->elem[i].blink1,
                priv->error->elem[i].blink2,
                priv->error->elem[i].link1,
                priv->error->elem[i].link2,
                priv->error->elem[i].data);

    len += snprintf(buf + len, PAGE_SIZE - len,
            "\n%08X", priv->error->log_len);
    for (i = 0; i < priv->error->log_len; i++)
        len += snprintf(buf + len, PAGE_SIZE - len,
                "\n%08X%08X%08X",
                priv->error->log[i].time,
                priv->error->log[i].event,
                priv->error->log[i].data);
    len += snprintf(buf + len, PAGE_SIZE - len, "\n");
    return len;
}

static ssize_t clear_error(struct device *d,
               struct device_attribute *attr,
               const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);

    kfree(priv->error);
    priv->error = NULL;
    return count;
}

static DEVICE_ATTR(error, S_IRUGO | S_IWUSR, show_error, clear_error);

static ssize_t show_cmd_log(struct device *d,
                struct device_attribute *attr, char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    u32 len = 0, i;
    if (!priv->cmdlog)
        return 0;
    for (i = (priv->cmdlog_pos + 1) % priv->cmdlog_len;
         (i != priv->cmdlog_pos) && (PAGE_SIZE - len);
         i = (i + 1) % priv->cmdlog_len) {
        len +=
            snprintf(buf + len, PAGE_SIZE - len,
                 "\n%08lX%08X%08X%08X\n", priv->cmdlog[i].jiffies,
                 priv->cmdlog[i].retcode, priv->cmdlog[i].cmd.cmd,
                 priv->cmdlog[i].cmd.len);
        len +=
            snprintk_buf(buf + len, PAGE_SIZE - len,
                 (u8 *) priv->cmdlog[i].cmd.param,
                 priv->cmdlog[i].cmd.len);
        len += snprintf(buf + len, PAGE_SIZE - len, "\n");
    }
    len += snprintf(buf + len, PAGE_SIZE - len, "\n");
    return len;
}

static DEVICE_ATTR(cmd_log, S_IRUGO, show_cmd_log, NULL);

#ifdef CONFIG_IPW2200_PROMISCUOUS
static void ipw_prom_free(struct ipw_priv *priv);
static int ipw_prom_alloc(struct ipw_priv *priv);
static ssize_t store_rtap_iface(struct device *d,
             struct device_attribute *attr,
             const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    int rc = 0;

    if (count < 1)
        return -EINVAL;

    switch (buf[0]) {
    case '0':
        if (!rtap_iface)
            return count;

        if (netif_running(priv->prom_net_dev)) {
            IPW_WARNING("Interface is up.  Cannot unregister.\n");
            return count;
        }

        ipw_prom_free(priv);
        rtap_iface = 0;
        break;

    case '1':
        if (rtap_iface)
            return count;

        rc = ipw_prom_alloc(priv);
        if (!rc)
            rtap_iface = 1;
        break;

    default:
        return -EINVAL;
    }

    if (rc) {
        IPW_ERROR("Failed to register promiscuous network "
              "device (error %d).\n", rc);
    }

    return count;
}

static ssize_t show_rtap_iface(struct device *d,
            struct device_attribute *attr,
            char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    if (rtap_iface)
        return sprintf(buf, "%s", priv->prom_net_dev->name);
    else {
        buf[0] = '-';
        buf[1] = '1';
        buf[2] = '\0';
        return 3;
    }
}

static DEVICE_ATTR(rtap_iface, S_IWUSR | S_IRUSR, show_rtap_iface,
           store_rtap_iface);

static ssize_t store_rtap_filter(struct device *d,
             struct device_attribute *attr,
             const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);

    if (!priv->prom_priv) {
        IPW_ERROR("Attempting to set filter without "
              "rtap_iface enabled.\n");
        return -EPERM;
    }

    priv->prom_priv->filter = simple_strtol(buf, NULL, 0);

    IPW_DEBUG_INFO("Setting rtap filter to " BIT_FMT16 "\n",
               BIT_ARG16(priv->prom_priv->filter));

    return count;
}

static ssize_t show_rtap_filter(struct device *d,
            struct device_attribute *attr,
            char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    return sprintf(buf, "0x%04X",
               priv->prom_priv ? priv->prom_priv->filter : 0);
}

static DEVICE_ATTR(rtap_filter, S_IWUSR | S_IRUSR, show_rtap_filter,
           store_rtap_filter);
#endif

static ssize_t show_scan_age(struct device *d, struct device_attribute *attr,
                 char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    return sprintf(buf, "%d\n", priv->ieee->scan_age);
}

static ssize_t store_scan_age(struct device *d, struct device_attribute *attr,
                  const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    struct net_device *dev = priv->net_dev;
    char buffer[] = "00000000";
    unsigned long len =
        (sizeof(buffer) - 1) > count ? count : sizeof(buffer) - 1;
    unsigned long val;
    char *p = buffer;

    IPW_DEBUG_INFO("enter\n");

    strncpy(buffer, buf, len);
    buffer[len] = 0;

    if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
        p++;
        if (p[0] == 'x' || p[0] == 'X')
            p++;
        val = simple_strtoul(p, &p, 16);
    } else
        val = simple_strtoul(p, &p, 10);
    if (p == buffer) {
        IPW_DEBUG_INFO("%s: user supplied invalid value.\n", dev->name);
    } else {
        priv->ieee->scan_age = val;
        IPW_DEBUG_INFO("set scan_age = %u\n", priv->ieee->scan_age);
    }

    IPW_DEBUG_INFO("exit\n");
    return len;
}

static DEVICE_ATTR(scan_age, S_IWUSR | S_IRUGO, show_scan_age, store_scan_age);

static ssize_t show_led(struct device *d, struct device_attribute *attr,
            char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    return sprintf(buf, "%d\n", (priv->config & CFG_NO_LED) ? 0 : 1);
}

static ssize_t store_led(struct device *d, struct device_attribute *attr,
             const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);

    IPW_DEBUG_INFO("enter\n");

    if (count == 0)
        return 0;

    if (*buf == 0) {
        IPW_DEBUG_LED("Disabling LED control.\n");
        priv->config |= CFG_NO_LED;
        ipw_led_shutdown(priv);
    } else {
        IPW_DEBUG_LED("Enabling LED control.\n");
        priv->config &= ~CFG_NO_LED;
        ipw_led_init(priv);
    }

    IPW_DEBUG_INFO("exit\n");
    return count;
}

static DEVICE_ATTR(led, S_IWUSR | S_IRUGO, show_led, store_led);

static ssize_t show_status(struct device *d,
               struct device_attribute *attr, char *buf)
{
    struct ipw_priv *p = dev_get_drvdata(d);
    return sprintf(buf, "0x%08x\n", (int)p->status);
}

static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);

static ssize_t show_cfg(struct device *d, struct device_attribute *attr,
            char *buf)
{
    struct ipw_priv *p = dev_get_drvdata(d);
    return sprintf(buf, "0x%08x\n", (int)p->config);
}

static DEVICE_ATTR(cfg, S_IRUGO, show_cfg, NULL);

static ssize_t show_nic_type(struct device *d,
                 struct device_attribute *attr, char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    return sprintf(buf, "TYPE: %d\n", priv->nic_type);
}

static DEVICE_ATTR(nic_type, S_IRUGO, show_nic_type, NULL);

static ssize_t show_ucode_version(struct device *d,
                  struct device_attribute *attr, char *buf)
{
    u32 len = sizeof(u32), tmp = 0;
    struct ipw_priv *p = dev_get_drvdata(d);

    if (ipw_get_ordinal(p, IPW_ORD_STAT_UCODE_VERSION, &tmp, &len))
        return 0;

    return sprintf(buf, "0x%08x\n", tmp);
}

static DEVICE_ATTR(ucode_version, S_IWUSR | S_IRUGO, show_ucode_version, NULL);

static ssize_t show_rtc(struct device *d, struct device_attribute *attr,
            char *buf)
{
    u32 len = sizeof(u32), tmp = 0;
    struct ipw_priv *p = dev_get_drvdata(d);

    if (ipw_get_ordinal(p, IPW_ORD_STAT_RTC, &tmp, &len))
        return 0;

    return sprintf(buf, "0x%08x\n", tmp);
}

static DEVICE_ATTR(rtc, S_IWUSR | S_IRUGO, show_rtc, NULL);

/*
 * Add a device attribute to view/control the delay between eeprom
 * operations.
 */
static ssize_t show_eeprom_delay(struct device *d,
                 struct device_attribute *attr, char *buf)
{
    struct ipw_priv *p = dev_get_drvdata(d);
    int n = p->eeprom_delay;
    return sprintf(buf, "%i\n", n);
}
static ssize_t store_eeprom_delay(struct device *d,
                  struct device_attribute *attr,
                  const char *buf, size_t count)
{
    struct ipw_priv *p = dev_get_drvdata(d);
    sscanf(buf, "%i", &p->eeprom_delay);
    return strnlen(buf, count);
}

static DEVICE_ATTR(eeprom_delay, S_IWUSR | S_IRUGO,
           show_eeprom_delay, store_eeprom_delay);

static ssize_t show_command_event_reg(struct device *d,
                      struct device_attribute *attr, char *buf)
{
    u32 reg = 0;
    struct ipw_priv *p = dev_get_drvdata(d);

    reg = ipw_read_reg32(p, IPW_INTERNAL_CMD_EVENT);
    return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_command_event_reg(struct device *d,
                       struct device_attribute *attr,
                       const char *buf, size_t count)
{
    u32 reg;
    struct ipw_priv *p = dev_get_drvdata(d);

    sscanf(buf, "%x", &reg);
    ipw_write_reg32(p, IPW_INTERNAL_CMD_EVENT, reg);
    return strnlen(buf, count);
}

static DEVICE_ATTR(command_event_reg, S_IWUSR | S_IRUGO,
           show_command_event_reg, store_command_event_reg);

static ssize_t show_mem_gpio_reg(struct device *d,
                 struct device_attribute *attr, char *buf)
{
    u32 reg = 0;
    struct ipw_priv *p = dev_get_drvdata(d);

    reg = ipw_read_reg32(p, 0x301100);
    return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_mem_gpio_reg(struct device *d,
                  struct device_attribute *attr,
                  const char *buf, size_t count)
{
    u32 reg;
    struct ipw_priv *p = dev_get_drvdata(d);

    sscanf(buf, "%x", &reg);
    ipw_write_reg32(p, 0x301100, reg);
    return strnlen(buf, count);
}

static DEVICE_ATTR(mem_gpio_reg, S_IWUSR | S_IRUGO,
           show_mem_gpio_reg, store_mem_gpio_reg);

static ssize_t show_indirect_dword(struct device *d,
                   struct device_attribute *attr, char *buf)
{
    u32 reg = 0;
    struct ipw_priv *priv = dev_get_drvdata(d);

    if (priv->status & STATUS_INDIRECT_DWORD)
        reg = ipw_read_reg32(priv, priv->indirect_dword);
    else
        reg = 0;

    return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_indirect_dword(struct device *d,
                    struct device_attribute *attr,
                    const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);

    sscanf(buf, "%x", &priv->indirect_dword);
    priv->status |= STATUS_INDIRECT_DWORD;
    return strnlen(buf, count);
}

static DEVICE_ATTR(indirect_dword, S_IWUSR | S_IRUGO,
           show_indirect_dword, store_indirect_dword);

static ssize_t show_indirect_byte(struct device *d,
                  struct device_attribute *attr, char *buf)
{
    u8 reg = 0;
    struct ipw_priv *priv = dev_get_drvdata(d);

    if (priv->status & STATUS_INDIRECT_BYTE)
        reg = ipw_read_reg8(priv, priv->indirect_byte);
    else
        reg = 0;

    return sprintf(buf, "0x%02x\n", reg);
}
static ssize_t store_indirect_byte(struct device *d,
                   struct device_attribute *attr,
                   const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);

    sscanf(buf, "%x", &priv->indirect_byte);
    priv->status |= STATUS_INDIRECT_BYTE;
    return strnlen(buf, count);
}

static DEVICE_ATTR(indirect_byte, S_IWUSR | S_IRUGO,
           show_indirect_byte, store_indirect_byte);

static ssize_t show_direct_dword(struct device *d,
                 struct device_attribute *attr, char *buf)
{
    u32 reg = 0;
    struct ipw_priv *priv = dev_get_drvdata(d);

    if (priv->status & STATUS_DIRECT_DWORD)
        reg = ipw_read32(priv, priv->direct_dword);
    else
        reg = 0;

    return sprintf(buf, "0x%08x\n", reg);
}
static ssize_t store_direct_dword(struct device *d,
                  struct device_attribute *attr,
                  const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);

    sscanf(buf, "%x", &priv->direct_dword);
    priv->status |= STATUS_DIRECT_DWORD;
    return strnlen(buf, count);
}

static DEVICE_ATTR(direct_dword, S_IWUSR | S_IRUGO,
           show_direct_dword, store_direct_dword);

static int rf_kill_active(struct ipw_priv *priv)
{
    if (0 == (ipw_read32(priv, 0x30) & 0x10000)) {
        priv->status |= STATUS_RF_KILL_HW;
        wiphy_rfkill_set_hw_state(priv->ieee->wdev.wiphy, true);
    } else {
        priv->status &= ~STATUS_RF_KILL_HW;
        wiphy_rfkill_set_hw_state(priv->ieee->wdev.wiphy, false);
    }

    return (priv->status & STATUS_RF_KILL_HW) ? 1 : 0;
}

static ssize_t show_rf_kill(struct device *d, struct device_attribute *attr,
                char *buf)
{
    /* 0 - RF kill not enabled
       1 - SW based RF kill active (sysfs)
       2 - HW based RF kill active
       3 - Both HW and SW baed RF kill active */
    struct ipw_priv *priv = dev_get_drvdata(d);
    int val = ((priv->status & STATUS_RF_KILL_SW) ? 0x1 : 0x0) |
        (rf_kill_active(priv) ? 0x2 : 0x0);
    return sprintf(buf, "%i\n", val);
}

static int ipw_radio_kill_sw(struct ipw_priv *priv, int disable_radio)
{
    if ((disable_radio ? 1 : 0) ==
        ((priv->status & STATUS_RF_KILL_SW) ? 1 : 0))
        return 0;

    IPW_DEBUG_RF_KILL("Manual SW RF Kill set to: RADIO  %s\n",
              disable_radio ? "OFF" : "ON");

    if (disable_radio) {
        priv->status |= STATUS_RF_KILL_SW;

        cancel_delayed_work(&priv->request_scan);
        cancel_delayed_work(&priv->request_direct_scan);
        cancel_delayed_work(&priv->request_passive_scan);
        cancel_delayed_work(&priv->scan_event);
        schedule_work(&priv->down);
    } else {
        priv->status &= ~STATUS_RF_KILL_SW;
        if (rf_kill_active(priv)) {
            IPW_DEBUG_RF_KILL("Can not turn radio back on - "
                      "disabled by HW switch\n");
            /* Make sure the RF_KILL check timer is running */
            cancel_delayed_work(&priv->rf_kill);
            schedule_delayed_work(&priv->rf_kill,
                          round_jiffies_relative(2 * HZ));
        } else
            schedule_work(&priv->up);
    }

    return 1;
}

static ssize_t store_rf_kill(struct device *d, struct device_attribute *attr,
                 const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);

    ipw_radio_kill_sw(priv, buf[0] == '1');

    return count;
}

static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);

static ssize_t show_speed_scan(struct device *d, struct device_attribute *attr,
                   char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    int pos = 0, len = 0;
    if (priv->config & CFG_SPEED_SCAN) {
        while (priv->speed_scan[pos] != 0)
            len += sprintf(&buf[len], "%d ",
                       priv->speed_scan[pos++]);
        return len + sprintf(&buf[len], "\n");
    }

    return sprintf(buf, "0\n");
}

static ssize_t store_speed_scan(struct device *d, struct device_attribute *attr,
                const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    int channel, pos = 0;
    const char *p = buf;

    /* list of space separated channels to scan, optionally ending with 0 */
    while ((channel = simple_strtol(p, NULL, 0))) {
        if (pos == MAX_SPEED_SCAN - 1) {
            priv->speed_scan[pos] = 0;
            break;
        }

        if (libipw_is_valid_channel(priv->ieee, channel))
            priv->speed_scan[pos++] = channel;
        else
            IPW_WARNING("Skipping invalid channel request: %d\n",
                    channel);
        p = strchr(p, ' ');
        if (!p)
            break;
        while (*p == ' ' || *p == '\t')
            p++;
    }

    if (pos == 0)
        priv->config &= ~CFG_SPEED_SCAN;
    else {
        priv->speed_scan_pos = 0;
        priv->config |= CFG_SPEED_SCAN;
    }

    return count;
}

static DEVICE_ATTR(speed_scan, S_IWUSR | S_IRUGO, show_speed_scan,
           store_speed_scan);

static ssize_t show_net_stats(struct device *d, struct device_attribute *attr,
                  char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    return sprintf(buf, "%c\n", (priv->config & CFG_NET_STATS) ? '1' : '0');
}

static ssize_t store_net_stats(struct device *d, struct device_attribute *attr,
                   const char *buf, size_t count)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    if (buf[0] == '1')
        priv->config |= CFG_NET_STATS;
    else
        priv->config &= ~CFG_NET_STATS;

    return count;
}

static DEVICE_ATTR(net_stats, S_IWUSR | S_IRUGO,
           show_net_stats, store_net_stats);

static ssize_t show_channels(struct device *d,
                 struct device_attribute *attr,
                 char *buf)
{
    struct ipw_priv *priv = dev_get_drvdata(d);
    const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
    int len = 0, i;

    len = sprintf(&buf[len],
              "Displaying %d channels in 2.4Ghz band "
              "(802.11bg):\n", geo->bg_channels);

    for (i = 0; i < geo->bg_channels; i++) {
        len += sprintf(&buf[len], "%d: BSS%s%s, %s, Band %s.\n",
                   geo->bg[i].channel,
                   geo->bg[i].flags & LIBIPW_CH_RADAR_DETECT ?
                   " (radar spectrum)" : "",
                   ((geo->bg[i].flags & LIBIPW_CH_NO_IBSS) ||
                (geo->bg[i].flags & LIBIPW_CH_RADAR_DETECT))
                   ? "" : ", IBSS",
                   geo->bg[i].flags & LIBIPW_CH_PASSIVE_ONLY ?
                   "passive only" : "active/passive",
                   geo->bg[i].flags & LIBIPW_CH_B_ONLY ?
                   "B" : "B/G");
    }

    len += sprintf(&buf[len],
               "Displaying %d channels in 5.2Ghz band "
               "(802.11a):\n", geo->a_channels);
    for (i = 0; i < geo->a_channels; i++) {
        len += sprintf(&buf[len], "%d: BSS%s%s, %s.\n",
                   geo->a[i].channel,
                   geo->a[i].flags & LIBIPW_CH_RADAR_DETECT ?
                   " (radar spectrum)" : "",
                   ((geo->a[i].flags & LIBIPW_CH_NO_IBSS) ||
                (geo->a[i].flags & LIBIPW_CH_RADAR_DETECT))
                   ? "" : ", IBSS",
                   geo->a[i].flags & LIBIPW_CH_PASSIVE_ONLY ?
                   "passive only" : "active/passive");
    }

    return len;
}

static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);

static void notify_wx_assoc_event(struct ipw_priv *priv)
{
    union iwreq_data wrqu;
    wrqu.ap_addr.sa_family = ARPHRD_ETHER;
    if (priv->status & STATUS_ASSOCIATED)
        memcpy(wrqu.ap_addr.sa_data, priv->bssid, ETH_ALEN);
    else
        memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
    wireless_send_event(priv->net_dev, SIOCGIWAP, &wrqu, NULL);
}

static void ipw_irq_tasklet(struct ipw_priv *priv)
{
    u32 inta, inta_mask, handled = 0;
    unsigned long flags;
    int rc = 0;

    spin_lock_irqsave(&priv->irq_lock, flags);

    inta = ipw_read32(priv, IPW_INTA_RW);
    inta_mask = ipw_read32(priv, IPW_INTA_MASK_R);

    if (inta == 0xFFFFFFFF) {
        /* Hardware disappeared */
        IPW_WARNING("TASKLET INTA == 0xFFFFFFFF\n");
        /* Only handle the cached INTA values */
        inta = 0;
    }
    inta &= (IPW_INTA_MASK_ALL & inta_mask);

    /* Add any cached INTA values that need to be handled */
    inta |= priv->isr_inta;

    spin_unlock_irqrestore(&priv->irq_lock, flags);

    spin_lock_irqsave(&priv->lock, flags);

    /* handle all the justifications for the interrupt */
    if (inta & IPW_INTA_BIT_RX_TRANSFER) {
        ipw_rx(priv);
        handled |= IPW_INTA_BIT_RX_TRANSFER;
    }

    if (inta & IPW_INTA_BIT_TX_CMD_QUEUE) {
        IPW_DEBUG_HC("Command completed.\n");
        rc = ipw_queue_tx_reclaim(priv, &priv->txq_cmd, -1);
        priv->status &= ~STATUS_HCMD_ACTIVE;
        wake_up_interruptible(&priv->wait_command_queue);
        handled |= IPW_INTA_BIT_TX_CMD_QUEUE;
    }

    if (inta & IPW_INTA_BIT_TX_QUEUE_1) {
        IPW_DEBUG_TX("TX_QUEUE_1\n");
        rc = ipw_queue_tx_reclaim(priv, &priv->txq[0], 0);
        handled |= IPW_INTA_BIT_TX_QUEUE_1;
    }

    if (inta & IPW_INTA_BIT_TX_QUEUE_2) {
        IPW_DEBUG_TX("TX_QUEUE_2\n");
        rc = ipw_queue_tx_reclaim(priv, &priv->txq[1], 1);
        handled |= IPW_INTA_BIT_TX_QUEUE_2;
    }

    if (inta & IPW_INTA_BIT_TX_QUEUE_3) {
        IPW_DEBUG_TX("TX_QUEUE_3\n");
        rc = ipw_queue_tx_reclaim(priv, &priv->txq[2], 2);
        handled |= IPW_INTA_BIT_TX_QUEUE_3;
    }

    if (inta & IPW_INTA_BIT_TX_QUEUE_4) {
        IPW_DEBUG_TX("TX_QUEUE_4\n");
        rc = ipw_queue_tx_reclaim(priv, &priv->txq[3], 3);
        handled |= IPW_INTA_BIT_TX_QUEUE_4;
    }

    if (inta & IPW_INTA_BIT_STATUS_CHANGE) {
        IPW_WARNING("STATUS_CHANGE\n");
        handled |= IPW_INTA_BIT_STATUS_CHANGE;
    }

    if (inta & IPW_INTA_BIT_BEACON_PERIOD_EXPIRED) {
        IPW_WARNING("TX_PERIOD_EXPIRED\n");
        handled |= IPW_INTA_BIT_BEACON_PERIOD_EXPIRED;
    }

    if (inta & IPW_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE) {
        IPW_WARNING("HOST_CMD_DONE\n");
        handled |= IPW_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE;
    }

    if (inta & IPW_INTA_BIT_FW_INITIALIZATION_DONE) {
        IPW_WARNING("FW_INITIALIZATION_DONE\n");
        handled |= IPW_INTA_BIT_FW_INITIALIZATION_DONE;
    }

    if (inta & IPW_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE) {
        IPW_WARNING("PHY_OFF_DONE\n");
        handled |= IPW_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE;
    }

    if (inta & IPW_INTA_BIT_RF_KILL_DONE) {
        IPW_DEBUG_RF_KILL("RF_KILL_DONE\n");
        priv->status |= STATUS_RF_KILL_HW;
        wiphy_rfkill_set_hw_state(priv->ieee->wdev.wiphy, true);
        wake_up_interruptible(&priv->wait_command_queue);
        priv->status &= ~(STATUS_ASSOCIATED | STATUS_ASSOCIATING);
        cancel_delayed_work(&priv->request_scan);
        cancel_delayed_work(&priv->request_direct_scan);
        cancel_delayed_work(&priv->request_passive_scan);
        cancel_delayed_work(&priv->scan_event);
        schedule_work(&priv->link_down);
        schedule_delayed_work(&priv->rf_kill, 2 * HZ);
        handled |= IPW_INTA_BIT_RF_KILL_DONE;
    }

    if (inta & IPW_INTA_BIT_FATAL_ERROR) {
        IPW_WARNING("Firmware error detected.  Restarting.\n");
        if (priv->error) {
            IPW_DEBUG_FW("Sysfs 'error' log already exists.\n");
            if (ipw_debug_level & IPW_DL_FW_ERRORS) {
                struct ipw_fw_error *error =
                    ipw_alloc_error_log(priv);
                ipw_dump_error_log(priv, error);
                kfree(error);
            }
        } else {
            priv->error = ipw_alloc_error_log(priv);
            if (priv->error)
                IPW_DEBUG_FW("Sysfs 'error' log captured.\n");
            else
                IPW_DEBUG_FW("Error allocating sysfs 'error' "
                         "log.\n");
            if (ipw_debug_level & IPW_DL_FW_ERRORS)
                ipw_dump_error_log(priv, priv->error);
        }

        /* XXX: If hardware encryption is for WPA/WPA2,
         * we have to notify the supplicant. */
        if (priv->ieee->sec.encrypt) {
            priv->status &= ~STATUS_ASSOCIATED;
            notify_wx_assoc_event(priv);
        }

        /* Keep the restart process from trying to send host
         * commands by clearing the INIT status bit */
        priv->status &= ~STATUS_INIT;

        /* Cancel currently queued command. */
        priv->status &= ~STATUS_HCMD_ACTIVE;
        wake_up_interruptible(&priv->wait_command_queue);

        schedule_work(&priv->adapter_restart);
        handled |= IPW_INTA_BIT_FATAL_ERROR;
    }

    if (inta & IPW_INTA_BIT_PARITY_ERROR) {
        IPW_ERROR("Parity error\n");
        handled |= IPW_INTA_BIT_PARITY_ERROR;
    }

    if (handled != inta) {
        IPW_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
    }

    spin_unlock_irqrestore(&priv->lock, flags);

    /* enable all interrupts */
    ipw_enable_interrupts(priv);
}

#define IPW_CMD(x) case IPW_CMD_ ## x : return #x
static char *get_cmd_string(u8 cmd)
{
    switch (cmd) {
        IPW_CMD(HOST_COMPLETE);
        IPW_CMD(POWER_DOWN);
        IPW_CMD(SYSTEM_CONFIG);
        IPW_CMD(MULTICAST_ADDRESS);
        IPW_CMD(SSID);
        IPW_CMD(ADAPTER_ADDRESS);
        IPW_CMD(PORT_TYPE);
        IPW_CMD(RTS_THRESHOLD);
        IPW_CMD(FRAG_THRESHOLD);
        IPW_CMD(POWER_MODE);
        IPW_CMD(WEP_KEY);
        IPW_CMD(TGI_TX_KEY);
        IPW_CMD(SCAN_REQUEST);
        IPW_CMD(SCAN_REQUEST_EXT);
        IPW_CMD(ASSOCIATE);
        IPW_CMD(SUPPORTED_RATES);
        IPW_CMD(SCAN_ABORT);
        IPW_CMD(TX_FLUSH);
        IPW_CMD(QOS_PARAMETERS);
        IPW_CMD(DINO_CONFIG);
        IPW_CMD(RSN_CAPABILITIES);
        IPW_CMD(RX_KEY);
        IPW_CMD(CARD_DISABLE);
        IPW_CMD(SEED_NUMBER);
        IPW_CMD(TX_POWER);
        IPW_CMD(COUNTRY_INFO);
        IPW_CMD(AIRONET_INFO);
        IPW_CMD(AP_TX_POWER);
        IPW_CMD(CCKM_INFO);
        IPW_CMD(CCX_VER_INFO);
        IPW_CMD(SET_CALIBRATION);
        IPW_CMD(SENSITIVITY_CALIB);
        IPW_CMD(RETRY_LIMIT);
        IPW_CMD(IPW_PRE_POWER_DOWN);
        IPW_CMD(VAP_BEACON_TEMPLATE);
        IPW_CMD(VAP_DTIM_PERIOD);
        IPW_CMD(EXT_SUPPORTED_RATES);
        IPW_CMD(VAP_LOCAL_TX_PWR_CONSTRAINT);
        IPW_CMD(VAP_QUIET_INTERVALS);
        IPW_CMD(VAP_CHANNEL_SWITCH);
        IPW_CMD(VAP_MANDATORY_CHANNELS);
        IPW_CMD(VAP_CELL_PWR_LIMIT);
        IPW_CMD(VAP_CF_PARAM_SET);
        IPW_CMD(VAP_SET_BEACONING_STATE);
        IPW_CMD(MEASUREMENT);
        IPW_CMD(POWER_CAPABILITY);
        IPW_CMD(SUPPORTED_CHANNELS);
        IPW_CMD(TPC_REPORT);
        IPW_CMD(WME_INFO);
        IPW_CMD(PRODUCTION_COMMAND);
    default:
        return "UNKNOWN";
    }
}

#define HOST_COMPLETE_TIMEOUT HZ

static int __ipw_send_cmd(struct ipw_priv *priv, struct host_cmd *cmd)
{
    int rc = 0;
    unsigned long flags;
    unsigned long now, end;

    spin_lock_irqsave(&priv->lock, flags);
    if (priv->status & STATUS_HCMD_ACTIVE) {
        IPW_ERROR("Failed to send %s: Already sending a command.\n",
              get_cmd_string(cmd->cmd));
        spin_unlock_irqrestore(&priv->lock, flags);
        return -EAGAIN;
    }

    priv->status |= STATUS_HCMD_ACTIVE;

    if (priv->cmdlog) {
        priv->cmdlog[priv->cmdlog_pos].jiffies = jiffies;
        priv->cmdlog[priv->cmdlog_pos].cmd.cmd = cmd->cmd;
        priv->cmdlog[priv->cmdlog_pos].cmd.len = cmd->len;
        memcpy(priv->cmdlog[priv->cmdlog_pos].cmd.param, cmd->param,
               cmd->len);
        priv->cmdlog[priv->cmdlog_pos].retcode = -1;
    }

    IPW_DEBUG_HC("%s command (#%d) %d bytes: 0x%08X\n",
             get_cmd_string(cmd->cmd), cmd->cmd, cmd->len,
             priv->status);

#ifndef DEBUG_CMD_WEP_KEY
    if (cmd->cmd == IPW_CMD_WEP_KEY)
        IPW_DEBUG_HC("WEP_KEY command masked out for secure.\n");
    else
#endif
        printk_buf(IPW_DL_HOST_COMMAND, (u8 *) cmd->param, cmd->len);

    rc = ipw_queue_tx_hcmd(priv, cmd->cmd, cmd->param, cmd->len, 0);
    if (rc) {
        priv->status &= ~STATUS_HCMD_ACTIVE;
        IPW_ERROR("Failed to send %s: Reason %d\n",
              get_cmd_string(cmd->cmd), rc);
        spin_unlock_irqrestore(&priv->lock, flags);
        goto exit;
    }
    spin_unlock_irqrestore(&priv->lock, flags);

    now = jiffies;
    end = now + HOST_COMPLETE_TIMEOUT;
again:
    rc = wait_event_interruptible_timeout(priv->wait_command_queue,
                          !(priv->
                        status & STATUS_HCMD_ACTIVE),
                          end - now);
    if (rc < 0) {
        now = jiffies;
        if (time_before(now, end))
            goto again;
        rc = 0;
    }

    if (rc == 0) {
        spin_lock_irqsave(&priv->lock, flags);
        if (priv->status & STATUS_HCMD_ACTIVE) {
            IPW_ERROR("Failed to send %s: Command timed out.\n",
                  get_cmd_string(cmd->cmd));
            priv->status &= ~STATUS_HCMD_ACTIVE;
            spin_unlock_irqrestore(&priv->lock, flags);
            rc = -EIO;
            goto exit;
        }
        spin_unlock_irqrestore(&priv->lock, flags);
    } else
        rc = 0;

    if (priv->status & STATUS_RF_KILL_HW) {
        IPW_ERROR("Failed to send %s: Aborted due to RF kill switch.\n",
              get_cmd_string(cmd->cmd));
        rc = -EIO;
        goto exit;
    }

      exit:
    if (priv->cmdlog) {
        priv->cmdlog[priv->cmdlog_pos++].retcode = rc;
        priv->cmdlog_pos %= priv->cmdlog_len;
    }
    return rc;
}

static int ipw_send_cmd_simple(struct ipw_priv *priv, u8 command)
{
    struct host_cmd cmd = {
        .cmd = command,
    };

    return __ipw_send_cmd(priv, &cmd);
}

static int ipw_send_cmd_pdu(struct ipw_priv *priv, u8 command, u8 len,
                void *data)
{
    struct host_cmd cmd = {
        .cmd = command,
        .len = len,
        .param = data,
    };

    return __ipw_send_cmd(priv, &cmd);
}

static int ipw_send_host_complete(struct ipw_priv *priv)
{
    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_simple(priv, IPW_CMD_HOST_COMPLETE);
}

static int ipw_send_system_config(struct ipw_priv *priv)
{
    return ipw_send_cmd_pdu(priv, IPW_CMD_SYSTEM_CONFIG,
                sizeof(priv->sys_config),
                &priv->sys_config);
}

static int ipw_send_ssid(struct ipw_priv *priv, u8 * ssid, int len)
{
    if (!priv || !ssid) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_SSID, min(len, IW_ESSID_MAX_SIZE),
                ssid);
}

static int ipw_send_adapter_address(struct ipw_priv *priv, u8 * mac)
{
    if (!priv || !mac) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    IPW_DEBUG_INFO("%s: Setting MAC to %pM\n",
               priv->net_dev->name, mac);

    return ipw_send_cmd_pdu(priv, IPW_CMD_ADAPTER_ADDRESS, ETH_ALEN, mac);
}

static void ipw_adapter_restart(void *adapter)
{
    struct ipw_priv *priv = adapter;

    if (priv->status & STATUS_RF_KILL_MASK)
        return;

    ipw_down(priv);

    if (priv->assoc_network &&
        (priv->assoc_network->capability & WLAN_CAPABILITY_IBSS))
        ipw_remove_current_network(priv);

    if (ipw_up(priv)) {
        IPW_ERROR("Failed to up device\n");
        return;
    }
}

static void ipw_bg_adapter_restart(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, adapter_restart);
    mutex_lock(&priv->mutex);
    ipw_adapter_restart(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_abort_scan(struct ipw_priv *priv);

#define IPW_SCAN_CHECK_WATCHDOG (5 * HZ)

static void ipw_scan_check(void *data)
{
    struct ipw_priv *priv = data;

    if (priv->status & STATUS_SCAN_ABORTING) {
        IPW_DEBUG_SCAN("Scan completion watchdog resetting "
                   "adapter after (%dms).\n",
                   jiffies_to_msecs(IPW_SCAN_CHECK_WATCHDOG));
        schedule_work(&priv->adapter_restart);
    } else if (priv->status & STATUS_SCANNING) {
        IPW_DEBUG_SCAN("Scan completion watchdog aborting scan "
                   "after (%dms).\n",
                   jiffies_to_msecs(IPW_SCAN_CHECK_WATCHDOG));
        ipw_abort_scan(priv);
        schedule_delayed_work(&priv->scan_check, HZ);
    }
}

static void ipw_bg_scan_check(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, scan_check.work);
    mutex_lock(&priv->mutex);
    ipw_scan_check(priv);
    mutex_unlock(&priv->mutex);
}

static int ipw_send_scan_request_ext(struct ipw_priv *priv,
                     struct ipw_scan_request_ext *request)
{
    return ipw_send_cmd_pdu(priv, IPW_CMD_SCAN_REQUEST_EXT,
                sizeof(*request), request);
}

static int ipw_send_scan_abort(struct ipw_priv *priv)
{
    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_simple(priv, IPW_CMD_SCAN_ABORT);
}

static int ipw_set_sensitivity(struct ipw_priv *priv, u16 sens)
{
    struct ipw_sensitivity_calib calib = {
        .beacon_rssi_raw = cpu_to_le16(sens),
    };

    return ipw_send_cmd_pdu(priv, IPW_CMD_SENSITIVITY_CALIB, sizeof(calib),
                &calib);
}

static int ipw_send_associate(struct ipw_priv *priv,
                  struct ipw_associate *associate)
{
    if (!priv || !associate) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_ASSOCIATE, sizeof(*associate),
                associate);
}

static int ipw_send_supported_rates(struct ipw_priv *priv,
                    struct ipw_supported_rates *rates)
{
    if (!priv || !rates) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_SUPPORTED_RATES, sizeof(*rates),
                rates);
}

static int ipw_set_random_seed(struct ipw_priv *priv)
{
    u32 val;

    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    get_random_bytes(&val, sizeof(val));

    return ipw_send_cmd_pdu(priv, IPW_CMD_SEED_NUMBER, sizeof(val), &val);
}

static int ipw_send_card_disable(struct ipw_priv *priv, u32 phy_off)
{
    __le32 v = cpu_to_le32(phy_off);
    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_CARD_DISABLE, sizeof(v), &v);
}

static int ipw_send_tx_power(struct ipw_priv *priv, struct ipw_tx_power *power)
{
    if (!priv || !power) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_TX_POWER, sizeof(*power), power);
}

static int ipw_set_tx_power(struct ipw_priv *priv)
{
    const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
    struct ipw_tx_power tx_power;
    s8 max_power;
    int i;

    memset(&tx_power, 0, sizeof(tx_power));

    /* configure device for 'G' band */
    tx_power.ieee_mode = IPW_G_MODE;
    tx_power.num_channels = geo->bg_channels;
    for (i = 0; i < geo->bg_channels; i++) {
        max_power = geo->bg[i].max_power;
        tx_power.channels_tx_power[i].channel_number =
            geo->bg[i].channel;
        tx_power.channels_tx_power[i].tx_power = max_power ?
            min(max_power, priv->tx_power) : priv->tx_power;
    }
    if (ipw_send_tx_power(priv, &tx_power))
        return -EIO;

    /* configure device to also handle 'B' band */
    tx_power.ieee_mode = IPW_B_MODE;
    if (ipw_send_tx_power(priv, &tx_power))
        return -EIO;

    /* configure device to also handle 'A' band */
    if (priv->ieee->abg_true) {
        tx_power.ieee_mode = IPW_A_MODE;
        tx_power.num_channels = geo->a_channels;
        for (i = 0; i < tx_power.num_channels; i++) {
            max_power = geo->a[i].max_power;
            tx_power.channels_tx_power[i].channel_number =
                geo->a[i].channel;
            tx_power.channels_tx_power[i].tx_power = max_power ?
                min(max_power, priv->tx_power) : priv->tx_power;
        }
        if (ipw_send_tx_power(priv, &tx_power))
            return -EIO;
    }
    return 0;
}

static int ipw_send_rts_threshold(struct ipw_priv *priv, u16 rts)
{
    struct ipw_rts_threshold rts_threshold = {
        .rts_threshold = cpu_to_le16(rts),
    };

    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_RTS_THRESHOLD,
                sizeof(rts_threshold), &rts_threshold);
}

static int ipw_send_frag_threshold(struct ipw_priv *priv, u16 frag)
{
    struct ipw_frag_threshold frag_threshold = {
        .frag_threshold = cpu_to_le16(frag),
    };

    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_FRAG_THRESHOLD,
                sizeof(frag_threshold), &frag_threshold);
}

static int ipw_send_power_mode(struct ipw_priv *priv, u32 mode)
{
    __le32 param;

    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    /* If on battery, set to 3, if AC set to CAM, else user
     * level */
    switch (mode) {
    case IPW_POWER_BATTERY:
        param = cpu_to_le32(IPW_POWER_INDEX_3);
        break;
    case IPW_POWER_AC:
        param = cpu_to_le32(IPW_POWER_MODE_CAM);
        break;
    default:
        param = cpu_to_le32(mode);
        break;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_POWER_MODE, sizeof(param),
                &param);
}

static int ipw_send_retry_limit(struct ipw_priv *priv, u8 slimit, u8 llimit)
{
    struct ipw_retry_limit retry_limit = {
        .short_retry_limit = slimit,
        .long_retry_limit = llimit
    };

    if (!priv) {
        IPW_ERROR("Invalid args\n");
        return -1;
    }

    return ipw_send_cmd_pdu(priv, IPW_CMD_RETRY_LIMIT, sizeof(retry_limit),
                &retry_limit);
}

/*
 * The IPW device contains a Microwire compatible EEPROM that stores
 * various data like the MAC address.  Usually the firmware has exclusive
 * access to the eeprom, but during device initialization (before the
 * device driver has sent the HostComplete command to the firmware) the
 * device driver has read access to the EEPROM by way of indirect addressing
 * through a couple of memory mapped registers.
 *
 * The following is a simplified implementation for pulling data out of the
 * the eeprom, along with some helper functions to find information in
 * the per device private data's copy of the eeprom.
 *
 * NOTE: To better understand how these functions work (i.e what is a chip
 *       select and why do have to keep driving the eeprom clock?), read
 *       just about any data sheet for a Microwire compatible EEPROM.
 */

/* write a 32 bit value into the indirect accessor register */
static inline void eeprom_write_reg(struct ipw_priv *p, u32 data)
{
    ipw_write_reg32(p, FW_MEM_REG_EEPROM_ACCESS, data);

    /* the eeprom requires some time to complete the operation */
    udelay(p->eeprom_delay);
}

/* perform a chip select operation */
static void eeprom_cs(struct ipw_priv *priv)
{
    eeprom_write_reg(priv, 0);
    eeprom_write_reg(priv, EEPROM_BIT_CS);
    eeprom_write_reg(priv, EEPROM_BIT_CS | EEPROM_BIT_SK);
    eeprom_write_reg(priv, EEPROM_BIT_CS);
}

/* perform a chip select operation */
static void eeprom_disable_cs(struct ipw_priv *priv)
{
    eeprom_write_reg(priv, EEPROM_BIT_CS);
    eeprom_write_reg(priv, 0);
    eeprom_write_reg(priv, EEPROM_BIT_SK);
}

/* push a single bit down to the eeprom */
static inline void eeprom_write_bit(struct ipw_priv *p, u8 bit)
{
    int d = (bit ? EEPROM_BIT_DI : 0);
    eeprom_write_reg(p, EEPROM_BIT_CS | d);
    eeprom_write_reg(p, EEPROM_BIT_CS | d | EEPROM_BIT_SK);
}

/* push an opcode followed by an address down to the eeprom */
static void eeprom_op(struct ipw_priv *priv, u8 op, u8 addr)
{
    int i;

    eeprom_cs(priv);
    eeprom_write_bit(priv, 1);
    eeprom_write_bit(priv, op & 2);
    eeprom_write_bit(priv, op & 1);
    for (i = 7; i >= 0; i--) {
        eeprom_write_bit(priv, addr & (1 << i));
    }
}

/* pull 16 bits off the eeprom, one bit at a time */
static u16 eeprom_read_u16(struct ipw_priv *priv, u8 addr)
{
    int i;
    u16 r = 0;

    /* Send READ Opcode */
    eeprom_op(priv, EEPROM_CMD_READ, addr);

    /* Send dummy bit */
    eeprom_write_reg(priv, EEPROM_BIT_CS);

    /* Read the byte off the eeprom one bit at a time */
    for (i = 0; i < 16; i++) {
        u32 data = 0;
        eeprom_write_reg(priv, EEPROM_BIT_CS | EEPROM_BIT_SK);
        eeprom_write_reg(priv, EEPROM_BIT_CS);
        data = ipw_read_reg32(priv, FW_MEM_REG_EEPROM_ACCESS);
        r = (r << 1) | ((data & EEPROM_BIT_DO) ? 1 : 0);
    }

    /* Send another dummy bit */
    eeprom_write_reg(priv, 0);
    eeprom_disable_cs(priv);

    return r;
}

/* helper function for pulling the mac address out of the private */
/* data's copy of the eeprom data                                 */
static void eeprom_parse_mac(struct ipw_priv *priv, u8 * mac)
{
    memcpy(mac, &priv->eeprom[EEPROM_MAC_ADDRESS], 6);
}

static void ipw_read_eeprom(struct ipw_priv *priv)
{
    int i;
    __le16 *eeprom = (__le16 *) priv->eeprom;

    IPW_DEBUG_TRACE(">>\n");

    /* read entire contents of eeprom into private buffer */
    for (i = 0; i < 128; i++)
        eeprom[i] = cpu_to_le16(eeprom_read_u16(priv, (u8) i));

    IPW_DEBUG_TRACE("<<\n");
}

/*
 * Either the device driver (i.e. the host) or the firmware can
 * load eeprom data into the designated region in SRAM.  If neither
 * happens then the FW will shutdown with a fatal error.
 *
 * In order to signal the FW to load the EEPROM, the EEPROM_LOAD_DISABLE
 * bit needs region of shared SRAM needs to be non-zero.
 */
static void ipw_eeprom_init_sram(struct ipw_priv *priv)
{
    int i;

    IPW_DEBUG_TRACE(">>\n");

    /*
       If the data looks correct, then copy it to our private
       copy.  Otherwise let the firmware know to perform the operation
       on its own.
     */
    if (priv->eeprom[EEPROM_VERSION] != 0) {
        IPW_DEBUG_INFO("Writing EEPROM data into SRAM\n");

        /* write the eeprom data to sram */
        for (i = 0; i < IPW_EEPROM_IMAGE_SIZE; i++)
            ipw_write8(priv, IPW_EEPROM_DATA + i, priv->eeprom[i]);

        /* Do not load eeprom data on fatal error or suspend */
        ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 0);
    } else {
        IPW_DEBUG_INFO("Enabling FW initializationg of SRAM\n");

        /* Load eeprom data on fatal error or suspend */
        ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 1);
    }

    IPW_DEBUG_TRACE("<<\n");
}

static void ipw_zero_memory(struct ipw_priv *priv, u32 start, u32 count)
{
    count >>= 2;
    if (!count)
        return;
    _ipw_write32(priv, IPW_AUTOINC_ADDR, start);
    while (count--)
        _ipw_write32(priv, IPW_AUTOINC_DATA, 0);
}

static inline void ipw_fw_dma_reset_command_blocks(struct ipw_priv *priv)
{
    ipw_zero_memory(priv, IPW_SHARED_SRAM_DMA_CONTROL,
            CB_NUMBER_OF_ELEMENTS_SMALL *
            sizeof(struct command_block));
}

static int ipw_fw_dma_enable(struct ipw_priv *priv)
{               /* start dma engine but no transfers yet */

    IPW_DEBUG_FW(">> :\n");

    /* Start the dma */
    ipw_fw_dma_reset_command_blocks(priv);

    /* Write CB base address */
    ipw_write_reg32(priv, IPW_DMA_I_CB_BASE, IPW_SHARED_SRAM_DMA_CONTROL);

    IPW_DEBUG_FW("<< :\n");
    return 0;
}

static void ipw_fw_dma_abort(struct ipw_priv *priv)
{
    u32 control = 0;

    IPW_DEBUG_FW(">> :\n");

    /* set the Stop and Abort bit */
    control = DMA_CONTROL_SMALL_CB_CONST_VALUE | DMA_CB_STOP_AND_ABORT;
    ipw_write_reg32(priv, IPW_DMA_I_DMA_CONTROL, control);
    priv->sram_desc.last_cb_index = 0;

    IPW_DEBUG_FW("<<\n");
}

static int ipw_fw_dma_write_command_block(struct ipw_priv *priv, int index,
                      struct command_block *cb)
{
    u32 address =
        IPW_SHARED_SRAM_DMA_CONTROL +
        (sizeof(struct command_block) * index);
    IPW_DEBUG_FW(">> :\n");

    ipw_write_indirect(priv, address, (u8 *) cb,
               (int)sizeof(struct command_block));

    IPW_DEBUG_FW("<< :\n");
    return 0;

}

static int ipw_fw_dma_kick(struct ipw_priv *priv)
{
    u32 control = 0;
    u32 index = 0;

    IPW_DEBUG_FW(">> :\n");

    for (index = 0; index < priv->sram_desc.last_cb_index; index++)
        ipw_fw_dma_write_command_block(priv, index,
                           &priv->sram_desc.cb_list[index]);

    /* Enable the DMA in the CSR register */
    ipw_clear_bit(priv, IPW_RESET_REG,
              IPW_RESET_REG_MASTER_DISABLED |
              IPW_RESET_REG_STOP_MASTER);

    /* Set the Start bit. */
    control = DMA_CONTROL_SMALL_CB_CONST_VALUE | DMA_CB_START;
    ipw_write_reg32(priv, IPW_DMA_I_DMA_CONTROL, control);

    IPW_DEBUG_FW("<< :\n");
    return 0;
}

static void ipw_fw_dma_dump_command_block(struct ipw_priv *priv)
{
    u32 address;
    u32 register_value = 0;
    u32 cb_fields_address = 0;

    IPW_DEBUG_FW(">> :\n");
    address = ipw_read_reg32(priv, IPW_DMA_I_CURRENT_CB);
    IPW_DEBUG_FW_INFO("Current CB is 0x%x\n", address);

    /* Read the DMA Controlor register */
    register_value = ipw_read_reg32(priv, IPW_DMA_I_DMA_CONTROL);
    IPW_DEBUG_FW_INFO("IPW_DMA_I_DMA_CONTROL is 0x%x\n", register_value);

    /* Print the CB values */
    cb_fields_address = address;
    register_value = ipw_read_reg32(priv, cb_fields_address);
    IPW_DEBUG_FW_INFO("Current CB Control Field is 0x%x\n", register_value);

    cb_fields_address += sizeof(u32);
    register_value = ipw_read_reg32(priv, cb_fields_address);
    IPW_DEBUG_FW_INFO("Current CB Source Field is 0x%x\n", register_value);

    cb_fields_address += sizeof(u32);
    register_value = ipw_read_reg32(priv, cb_fields_address);
    IPW_DEBUG_FW_INFO("Current CB Destination Field is 0x%x\n",
              register_value);

    cb_fields_address += sizeof(u32);
    register_value = ipw_read_reg32(priv, cb_fields_address);
    IPW_DEBUG_FW_INFO("Current CB Status Field is 0x%x\n", register_value);

    IPW_DEBUG_FW(">> :\n");
}

static int ipw_fw_dma_command_block_index(struct ipw_priv *priv)
{
    u32 current_cb_address = 0;
    u32 current_cb_index = 0;

    IPW_DEBUG_FW("<< :\n");
    current_cb_address = ipw_read_reg32(priv, IPW_DMA_I_CURRENT_CB);

    current_cb_index = (current_cb_address - IPW_SHARED_SRAM_DMA_CONTROL) /
        sizeof(struct command_block);

    IPW_DEBUG_FW_INFO("Current CB index 0x%x address = 0x%X\n",
              current_cb_index, current_cb_address);

    IPW_DEBUG_FW(">> :\n");
    return current_cb_index;

}

static int ipw_fw_dma_add_command_block(struct ipw_priv *priv,
                    u32 src_address,
                    u32 dest_address,
                    u32 length,
                    int interrupt_enabled, int is_last)
{

    u32 control = CB_VALID | CB_SRC_LE | CB_DEST_LE | CB_SRC_AUTOINC |
        CB_SRC_IO_GATED | CB_DEST_AUTOINC | CB_SRC_SIZE_LONG |
        CB_DEST_SIZE_LONG;
    struct command_block *cb;
    u32 last_cb_element = 0;

    IPW_DEBUG_FW_INFO("src_address=0x%x dest_address=0x%x length=0x%x\n",
              src_address, dest_address, length);

    if (priv->sram_desc.last_cb_index >= CB_NUMBER_OF_ELEMENTS_SMALL)
        return -1;

    last_cb_element = priv->sram_desc.last_cb_index;
    cb = &priv->sram_desc.cb_list[last_cb_element];
    priv->sram_desc.last_cb_index++;

    /* Calculate the new CB control word */
    if (interrupt_enabled)
        control |= CB_INT_ENABLED;

    if (is_last)
        control |= CB_LAST_VALID;

    control |= length;

    /* Calculate the CB Element's checksum value */
    cb->status = control ^ src_address ^ dest_address;

    /* Copy the Source and Destination addresses */
    cb->dest_addr = dest_address;
    cb->source_addr = src_address;

    /* Copy the Control Word last */
    cb->control = control;

    return 0;
}

static int ipw_fw_dma_add_buffer(struct ipw_priv *priv, dma_addr_t *src_address,
                 int nr, u32 dest_address, u32 len)
{
    int ret, i;
    u32 size;

    IPW_DEBUG_FW(">>\n");
    IPW_DEBUG_FW_INFO("nr=%d dest_address=0x%x len=0x%x\n",
              nr, dest_address, len);

    for (i = 0; i < nr; i++) {
        size = min_t(u32, len - i * CB_MAX_LENGTH, CB_MAX_LENGTH);
        ret = ipw_fw_dma_add_command_block(priv, src_address[i],
                           dest_address +
                           i * CB_MAX_LENGTH, size,
                           0, 0);
        if (ret) {
            IPW_DEBUG_FW_INFO(": Failed\n");
            return -1;
        } else
            IPW_DEBUG_FW_INFO(": Added new cb\n");
    }

    IPW_DEBUG_FW("<<\n");
    return 0;
}

static int ipw_fw_dma_wait(struct ipw_priv *priv)
{
    u32 current_index = 0, previous_index;
    u32 watchdog = 0;

    IPW_DEBUG_FW(">> :\n");

    current_index = ipw_fw_dma_command_block_index(priv);
    IPW_DEBUG_FW_INFO("sram_desc.last_cb_index:0x%08X\n",
              (int)priv->sram_desc.last_cb_index);

    while (current_index < priv->sram_desc.last_cb_index) {
        udelay(50);
        previous_index = current_index;
        current_index = ipw_fw_dma_command_block_index(priv);

        if (previous_index < current_index) {
            watchdog = 0;
            continue;
        }
        if (++watchdog > 400) {
            IPW_DEBUG_FW_INFO("Timeout\n");
            ipw_fw_dma_dump_command_block(priv);
            ipw_fw_dma_abort(priv);
            return -1;
        }
    }

    ipw_fw_dma_abort(priv);

    /*Disable the DMA in the CSR register */
    ipw_set_bit(priv, IPW_RESET_REG,
            IPW_RESET_REG_MASTER_DISABLED | IPW_RESET_REG_STOP_MASTER);

    IPW_DEBUG_FW("<< dmaWaitSync\n");
    return 0;
}

static void ipw_remove_current_network(struct ipw_priv *priv)
{
    struct list_head *element, *safe;
    struct libipw_network *network = NULL;
    unsigned long flags;

    spin_lock_irqsave(&priv->ieee->lock, flags);
    list_for_each_safe(element, safe, &priv->ieee->network_list) {
        network = list_entry(element, struct libipw_network, list);
        if (!memcmp(network->bssid, priv->bssid, ETH_ALEN)) {
            list_del(element);
            list_add_tail(&network->list,
                      &priv->ieee->network_free_list);
        }
    }
    spin_unlock_irqrestore(&priv->ieee->lock, flags);
}

static inline int ipw_alive(struct ipw_priv *priv)
{
    return ipw_read32(priv, 0x90) == 0xd55555d5;
}

/* timeout in msec, attempted in 10-msec quanta */
static int ipw_poll_bit(struct ipw_priv *priv, u32 addr, u32 mask,
                   int timeout)
{
    int i = 0;

    do {
        if ((ipw_read32(priv, addr) & mask) == mask)
            return i;
        mdelay(10);
        i += 10;
    } while (i < timeout);

    return -ETIME;
}

/* These functions load the firmware and micro code for the operation of
 * the ipw hardware.  It assumes the buffer has all the bits for the
 * image and the caller is handling the memory allocation and clean up.
 */

static int ipw_stop_master(struct ipw_priv *priv)
{
    int rc;

    IPW_DEBUG_TRACE(">>\n");
    /* stop master. typical delay - 0 */
    ipw_set_bit(priv, IPW_RESET_REG, IPW_RESET_REG_STOP_MASTER);

    /* timeout is in msec, polled in 10-msec quanta */
    rc = ipw_poll_bit(priv, IPW_RESET_REG,
              IPW_RESET_REG_MASTER_DISABLED, 100);
    if (rc < 0) {
        IPW_ERROR("wait for stop master failed after 100ms\n");
        return -1;
    }

    IPW_DEBUG_INFO("stop master %dms\n", rc);

    return rc;
}

static void ipw_arc_release(struct ipw_priv *priv)
{
    IPW_DEBUG_TRACE(">>\n");
    mdelay(5);

    ipw_clear_bit(priv, IPW_RESET_REG, CBD_RESET_REG_PRINCETON_RESET);

    /* no one knows timing, for safety add some delay */
    mdelay(5);
}

struct fw_chunk {
    __le32 address;
    __le32 length;
};

static int ipw_load_ucode(struct ipw_priv *priv, u8 * data, size_t len)
{
    int rc = 0, i, addr;
    u8 cr = 0;
    __le16 *image;

    image = (__le16 *) data;

    IPW_DEBUG_TRACE(">>\n");

    rc = ipw_stop_master(priv);

    if (rc < 0)
        return rc;

    for (addr = IPW_SHARED_LOWER_BOUND;
         addr < IPW_REGISTER_DOMAIN1_END; addr += 4) {
        ipw_write32(priv, addr, 0);
    }

    /* no ucode (yet) */
    memset(&priv->dino_alive, 0, sizeof(priv->dino_alive));
    /* destroy DMA queues */
    /* reset sequence */

    ipw_write_reg32(priv, IPW_MEM_HALT_AND_RESET, IPW_BIT_HALT_RESET_ON);
    ipw_arc_release(priv);
    ipw_write_reg32(priv, IPW_MEM_HALT_AND_RESET, IPW_BIT_HALT_RESET_OFF);
    mdelay(1);

    /* reset PHY */
    ipw_write_reg32(priv, IPW_INTERNAL_CMD_EVENT, IPW_BASEBAND_POWER_DOWN);
    mdelay(1);

    ipw_write_reg32(priv, IPW_INTERNAL_CMD_EVENT, 0);
    mdelay(1);

    /* enable ucode store */
    ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, 0x0);
    ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, DINO_ENABLE_CS);
    mdelay(1);

    /* write ucode */
    /* load new ipw uCode */
    for (i = 0; i < len / 2; i++)
        ipw_write_reg16(priv, IPW_BASEBAND_CONTROL_STORE,
                le16_to_cpu(image[i]));

    /* enable DINO */
    ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, 0);
    ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, DINO_ENABLE_SYSTEM);

    /* this is where the igx / win driver deveates from the VAP driver. */

    /* wait for alive response */
    for (i = 0; i < 100; i++) {
        /* poll for incoming data */
        cr = ipw_read_reg8(priv, IPW_BASEBAND_CONTROL_STATUS);
        if (cr & DINO_RXFIFO_DATA)
            break;
        mdelay(1);
    }

    if (cr & DINO_RXFIFO_DATA) {
        /* alive_command_responce size is NOT multiple of 4 */
        __le32 response_buffer[(sizeof(priv->dino_alive) + 3) / 4];

        for (i = 0; i < ARRAY_SIZE(response_buffer); i++)
            response_buffer[i] =
                cpu_to_le32(ipw_read_reg32(priv,
                               IPW_BASEBAND_RX_FIFO_READ));
        memcpy(&priv->dino_alive, response_buffer,
               sizeof(priv->dino_alive));
        if (priv->dino_alive.alive_command == 1
            && priv->dino_alive.ucode_valid == 1) {
            rc = 0;
            IPW_DEBUG_INFO
                ("Microcode OK, rev. %d (0x%x) dev. %d (0x%x) "
                 "of %02d/%02d/%02d %02d:%02d\n",
                 priv->dino_alive.software_revision,
                 priv->dino_alive.software_revision,
                 priv->dino_alive.device_identifier,
                 priv->dino_alive.device_identifier,
                 priv->dino_alive.time_stamp[0],
                 priv->dino_alive.time_stamp[1],
                 priv->dino_alive.time_stamp[2],
                 priv->dino_alive.time_stamp[3],
                 priv->dino_alive.time_stamp[4]);
        } else {
            IPW_DEBUG_INFO("Microcode is not alive\n");
            rc = -EINVAL;
        }
    } else {
        IPW_DEBUG_INFO("No alive response from DINO\n");
        rc = -ETIME;
    }

    /* disable DINO, otherwise for some reason
       firmware have problem getting alive resp. */
    ipw_write_reg8(priv, IPW_BASEBAND_CONTROL_STATUS, 0);

    return rc;
}

static int ipw_load_firmware(struct ipw_priv *priv, u8 * data, size_t len)
{
    int ret = -1;
    int offset = 0;
    struct fw_chunk *chunk;
    int total_nr = 0;
    int i;
    struct pci_pool *pool;
    void **virts;
    dma_addr_t *phys;

    IPW_DEBUG_TRACE("<< :\n");

    virts = kmalloc(sizeof(void *) * CB_NUMBER_OF_ELEMENTS_SMALL,
            GFP_KERNEL);
    if (!virts)
        return -ENOMEM;

    phys = kmalloc(sizeof(dma_addr_t) * CB_NUMBER_OF_ELEMENTS_SMALL,
            GFP_KERNEL);
    if (!phys) {
        kfree(virts);
        return -ENOMEM;
    }
    pool = pci_pool_create("ipw2200", priv->pci_dev, CB_MAX_LENGTH, 0, 0);
    if (!pool) {
        IPW_ERROR("pci_pool_create failed\n");
        kfree(phys);
        kfree(virts);
        return -ENOMEM;
    }

    /* Start the Dma */
    ret = ipw_fw_dma_enable(priv);

    /* the DMA is already ready this would be a bug. */
    BUG_ON(priv->sram_desc.last_cb_index > 0);

    do {
        u32 chunk_len;
        u8 *start;
        int size;
        int nr = 0;

        chunk = (struct fw_chunk *)(data + offset);
        offset += sizeof(struct fw_chunk);
        chunk_len = le32_to_cpu(chunk->length);
        start = data + offset;

        nr = (chunk_len + CB_MAX_LENGTH - 1) / CB_MAX_LENGTH;
        for (i = 0; i < nr; i++) {
            virts[total_nr] = pci_pool_alloc(pool, GFP_KERNEL,
                             &phys[total_nr]);
            if (!virts[total_nr]) {
                ret = -ENOMEM;
                goto out;
            }
            size = min_t(u32, chunk_len - i * CB_MAX_LENGTH,
                     CB_MAX_LENGTH);
            memcpy(virts[total_nr], start, size);
            start += size;
            total_nr++;
            /* We don't support fw chunk larger than 64*8K */
            BUG_ON(total_nr > CB_NUMBER_OF_ELEMENTS_SMALL);
        }

        /* build DMA packet and queue up for sending */
        /* dma to chunk->address, the chunk->length bytes from data +
         * offeset*/
        /* Dma loading */
        ret = ipw_fw_dma_add_buffer(priv, &phys[total_nr - nr],
                        nr, le32_to_cpu(chunk->address),
                        chunk_len);
        if (ret) {
            IPW_DEBUG_INFO("dmaAddBuffer Failed\n");
            goto out;
        }

        offset += chunk_len;
    } while (offset < len);

    /* Run the DMA and wait for the answer */
    ret = ipw_fw_dma_kick(priv);
    if (ret) {
        IPW_ERROR("dmaKick Failed\n");
        goto out;
    }

    ret = ipw_fw_dma_wait(priv);
    if (ret) {
        IPW_ERROR("dmaWaitSync Failed\n");
        goto out;
    }
 out:
    for (i = 0; i < total_nr; i++)
        pci_pool_free(pool, virts[i], phys[i]);

    pci_pool_destroy(pool);
    kfree(phys);
    kfree(virts);

    return ret;
}

/* stop nic */
static int ipw_stop_nic(struct ipw_priv *priv)
{
    int rc = 0;

    /* stop */
    ipw_write32(priv, IPW_RESET_REG, IPW_RESET_REG_STOP_MASTER);

    rc = ipw_poll_bit(priv, IPW_RESET_REG,
              IPW_RESET_REG_MASTER_DISABLED, 500);
    if (rc < 0) {
        IPW_ERROR("wait for reg master disabled failed after 500ms\n");
        return rc;
    }

    ipw_set_bit(priv, IPW_RESET_REG, CBD_RESET_REG_PRINCETON_RESET);

    return rc;
}

static void ipw_start_nic(struct ipw_priv *priv)
{
    IPW_DEBUG_TRACE(">>\n");

    /* prvHwStartNic  release ARC */
    ipw_clear_bit(priv, IPW_RESET_REG,
              IPW_RESET_REG_MASTER_DISABLED |
              IPW_RESET_REG_STOP_MASTER |
              CBD_RESET_REG_PRINCETON_RESET);

    /* enable power management */
    ipw_set_bit(priv, IPW_GP_CNTRL_RW,
            IPW_GP_CNTRL_BIT_HOST_ALLOWS_STANDBY);

    IPW_DEBUG_TRACE("<<\n");
}

static int ipw_init_nic(struct ipw_priv *priv)
{
    int rc;

    IPW_DEBUG_TRACE(">>\n");
    /* reset */
    /*prvHwInitNic */
    /* set "initialization complete" bit to move adapter to D0 state */
    ipw_set_bit(priv, IPW_GP_CNTRL_RW, IPW_GP_CNTRL_BIT_INIT_DONE);

    /* low-level PLL activation */
    ipw_write32(priv, IPW_READ_INT_REGISTER,
            IPW_BIT_INT_HOST_SRAM_READ_INT_REGISTER);

    /* wait for clock stabilization */
    rc = ipw_poll_bit(priv, IPW_GP_CNTRL_RW,
              IPW_GP_CNTRL_BIT_CLOCK_READY, 250);
    if (rc < 0)
        IPW_DEBUG_INFO("FAILED wait for clock stablization\n");

    /* assert SW reset */
    ipw_set_bit(priv, IPW_RESET_REG, IPW_RESET_REG_SW_RESET);

    udelay(10);

    /* set "initialization complete" bit to move adapter to D0 state */
    ipw_set_bit(priv, IPW_GP_CNTRL_RW, IPW_GP_CNTRL_BIT_INIT_DONE);

    IPW_DEBUG_TRACE(">>\n");
    return 0;
}

/* Call this function from process context, it will sleep in request_firmware.
 * Probe is an ok place to call this from.
 */
static int ipw_reset_nic(struct ipw_priv *priv)
{
    int rc = 0;
    unsigned long flags;

    IPW_DEBUG_TRACE(">>\n");

    rc = ipw_init_nic(priv);

    spin_lock_irqsave(&priv->lock, flags);
    /* Clear the 'host command active' bit... */
    priv->status &= ~STATUS_HCMD_ACTIVE;
    wake_up_interruptible(&priv->wait_command_queue);
    priv->status &= ~(STATUS_SCANNING | STATUS_SCAN_ABORTING);
    wake_up_interruptible(&priv->wait_state);
    spin_unlock_irqrestore(&priv->lock, flags);

    IPW_DEBUG_TRACE("<<\n");
    return rc;
}


struct ipw_fw {
    __le32 ver;
    __le32 boot_size;
    __le32 ucode_size;
    __le32 fw_size;
    u8 data[0];
};

static int ipw_get_fw(struct ipw_priv *priv,
              const struct firmware **raw, const char *name)
{
    struct ipw_fw *fw;
    int rc;

    /* ask firmware_class module to get the boot firmware off disk */
    rc = request_firmware(raw, name, &priv->pci_dev->dev);
    if (rc < 0) {
        IPW_ERROR("%s request_firmware failed: Reason %d\n", name, rc);
        return rc;
    }

    if ((*raw)->size < sizeof(*fw)) {
        IPW_ERROR("%s is too small (%zd)\n", name, (*raw)->size);
        return -EINVAL;
    }

    fw = (void *)(*raw)->data;

    if ((*raw)->size < sizeof(*fw) + le32_to_cpu(fw->boot_size) +
        le32_to_cpu(fw->ucode_size) + le32_to_cpu(fw->fw_size)) {
        IPW_ERROR("%s is too small or corrupt (%zd)\n",
              name, (*raw)->size);
        return -EINVAL;
    }

    IPW_DEBUG_INFO("Read firmware '%s' image v%d.%d (%zd bytes)\n",
               name,
               le32_to_cpu(fw->ver) >> 16,
               le32_to_cpu(fw->ver) & 0xff,
               (*raw)->size - sizeof(*fw));
    return 0;
}

#define IPW_RX_BUF_SIZE (3000)

static void ipw_rx_queue_reset(struct ipw_priv *priv,
                      struct ipw_rx_queue *rxq)
{
    unsigned long flags;
    int i;

    spin_lock_irqsave(&rxq->lock, flags);

    INIT_LIST_HEAD(&rxq->rx_free);
    INIT_LIST_HEAD(&rxq->rx_used);

    /* Fill the rx_used queue with _all_ of the Rx buffers */
    for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
        /* In the reset function, these buffers may have been allocated
         * to an SKB, so we need to unmap and free potential storage */
        if (rxq->pool[i].skb != NULL) {
            pci_unmap_single(priv->pci_dev, rxq->pool[i].dma_addr,
                     IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
            dev_kfree_skb(rxq->pool[i].skb);
            rxq->pool[i].skb = NULL;
        }
        list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
    }

    /* Set us so that we have processed and used all buffers, but have
     * not restocked the Rx queue with fresh buffers */
    rxq->read = rxq->write = 0;
    rxq->free_count = 0;
    spin_unlock_irqrestore(&rxq->lock, flags);
}

#ifdef CONFIG_PM
static int fw_loaded = 0;
static const struct firmware *raw = NULL;

static void free_firmware(void)
{
    if (fw_loaded) {
        release_firmware(raw);
        raw = NULL;
        fw_loaded = 0;
    }
}
#else
#define free_firmware() do {} while (0)
#endif

static int ipw_load(struct ipw_priv *priv)
{
#ifndef CONFIG_PM
    const struct firmware *raw = NULL;
#endif
    struct ipw_fw *fw;
    u8 *boot_img, *ucode_img, *fw_img;
    u8 *name = NULL;
    int rc = 0, retries = 3;

    switch (priv->ieee->iw_mode) {
    case IW_MODE_ADHOC:
        name = "ipw2200-ibss.fw";
        break;
#ifdef CONFIG_IPW2200_MONITOR
    case IW_MODE_MONITOR:
        name = "ipw2200-sniffer.fw";
        break;
#endif
    case IW_MODE_INFRA:
        name = "ipw2200-bss.fw";
        break;
    }

    if (!name) {
        rc = -EINVAL;
        goto error;
    }

#ifdef CONFIG_PM
    if (!fw_loaded) {
#endif
        rc = ipw_get_fw(priv, &raw, name);
        if (rc < 0)
            goto error;
#ifdef CONFIG_PM
    }
#endif

    fw = (void *)raw->data;
    boot_img = &fw->data[0];
    ucode_img = &fw->data[le32_to_cpu(fw->boot_size)];
    fw_img = &fw->data[le32_to_cpu(fw->boot_size) +
               le32_to_cpu(fw->ucode_size)];

    if (rc < 0)
        goto error;

    if (!priv->rxq)
        priv->rxq = ipw_rx_queue_alloc(priv);
    else
        ipw_rx_queue_reset(priv, priv->rxq);
    if (!priv->rxq) {
        IPW_ERROR("Unable to initialize Rx queue\n");
        goto error;
    }

      retry:
    /* Ensure interrupts are disabled */
    ipw_write32(priv, IPW_INTA_MASK_R, ~IPW_INTA_MASK_ALL);
    priv->status &= ~STATUS_INT_ENABLED;

    /* ack pending interrupts */
    ipw_write32(priv, IPW_INTA_RW, IPW_INTA_MASK_ALL);

    ipw_stop_nic(priv);

    rc = ipw_reset_nic(priv);
    if (rc < 0) {
        IPW_ERROR("Unable to reset NIC\n");
        goto error;
    }

    ipw_zero_memory(priv, IPW_NIC_SRAM_LOWER_BOUND,
            IPW_NIC_SRAM_UPPER_BOUND - IPW_NIC_SRAM_LOWER_BOUND);

    /* DMA the initial boot firmware into the device */
    rc = ipw_load_firmware(priv, boot_img, le32_to_cpu(fw->boot_size));
    if (rc < 0) {
        IPW_ERROR("Unable to load boot firmware: %d\n", rc);
        goto error;
    }

    /* kick start the device */
    ipw_start_nic(priv);

    /* wait for the device to finish its initial startup sequence */
    rc = ipw_poll_bit(priv, IPW_INTA_RW,
              IPW_INTA_BIT_FW_INITIALIZATION_DONE, 500);
    if (rc < 0) {
        IPW_ERROR("device failed to boot initial fw image\n");
        goto error;
    }
    IPW_DEBUG_INFO("initial device response after %dms\n", rc);

    /* ack fw init done interrupt */
    ipw_write32(priv, IPW_INTA_RW, IPW_INTA_BIT_FW_INITIALIZATION_DONE);

    /* DMA the ucode into the device */
    rc = ipw_load_ucode(priv, ucode_img, le32_to_cpu(fw->ucode_size));
    if (rc < 0) {
        IPW_ERROR("Unable to load ucode: %d\n", rc);
        goto error;
    }

    /* stop nic */
    ipw_stop_nic(priv);

    /* DMA bss firmware into the device */
    rc = ipw_load_firmware(priv, fw_img, le32_to_cpu(fw->fw_size));
    if (rc < 0) {
        IPW_ERROR("Unable to load firmware: %d\n", rc);
        goto error;
    }
#ifdef CONFIG_PM
    fw_loaded = 1;
#endif

    ipw_write32(priv, IPW_EEPROM_LOAD_DISABLE, 0);

    rc = ipw_queue_reset(priv);
    if (rc < 0) {
        IPW_ERROR("Unable to initialize queues\n");
        goto error;
    }

    /* Ensure interrupts are disabled */
    ipw_write32(priv, IPW_INTA_MASK_R, ~IPW_INTA_MASK_ALL);
    /* ack pending interrupts */
    ipw_write32(priv, IPW_INTA_RW, IPW_INTA_MASK_ALL);

    /* kick start the device */
    ipw_start_nic(priv);

    if (ipw_read32(priv, IPW_INTA_RW) & IPW_INTA_BIT_PARITY_ERROR) {
        if (retries > 0) {
            IPW_WARNING("Parity error.  Retrying init.\n");
            retries--;
            goto retry;
        }

        IPW_ERROR("TODO: Handle parity error -- schedule restart?\n");
        rc = -EIO;
        goto error;
    }

    /* wait for the device */
    rc = ipw_poll_bit(priv, IPW_INTA_RW,
              IPW_INTA_BIT_FW_INITIALIZATION_DONE, 500);
    if (rc < 0) {
        IPW_ERROR("device failed to start within 500ms\n");
        goto error;
    }
    IPW_DEBUG_INFO("device response after %dms\n", rc);

    /* ack fw init done interrupt */
    ipw_write32(priv, IPW_INTA_RW, IPW_INTA_BIT_FW_INITIALIZATION_DONE);

    /* read eeprom data */
    priv->eeprom_delay = 1;
    ipw_read_eeprom(priv);
    /* initialize the eeprom region of sram */
    ipw_eeprom_init_sram(priv);

    /* enable interrupts */
    ipw_enable_interrupts(priv);

    /* Ensure our queue has valid packets */
    ipw_rx_queue_replenish(priv);

    ipw_write32(priv, IPW_RX_READ_INDEX, priv->rxq->read);

    /* ack pending interrupts */
    ipw_write32(priv, IPW_INTA_RW, IPW_INTA_MASK_ALL);

#ifndef CONFIG_PM
    release_firmware(raw);
#endif
    return 0;

      error:
    if (priv->rxq) {
        ipw_rx_queue_free(priv, priv->rxq);
        priv->rxq = NULL;
    }
    ipw_tx_queue_free(priv);
    release_firmware(raw);
#ifdef CONFIG_PM
    fw_loaded = 0;
    raw = NULL;
#endif

    return rc;
}

static int ipw_rx_queue_space(const struct ipw_rx_queue *q)
{
    int s = q->read - q->write;
    if (s <= 0)
        s += RX_QUEUE_SIZE;
    /* keep some buffer to not confuse full and empty queue */
    s -= 2;
    if (s < 0)
        s = 0;
    return s;
}

static inline int ipw_tx_queue_space(const struct clx2_queue *q)
{
    int s = q->last_used - q->first_empty;
    if (s <= 0)
        s += q->n_bd;
    s -= 2;         /* keep some reserve to not confuse empty and full situations */
    if (s < 0)
        s = 0;
    return s;
}

static inline int ipw_queue_inc_wrap(int index, int n_bd)
{
    return (++index == n_bd) ? 0 : index;
}

static void ipw_queue_init(struct ipw_priv *priv, struct clx2_queue *q,
               int count, u32 read, u32 write, u32 base, u32 size)
{
    q->n_bd = count;

    q->low_mark = q->n_bd / 4;
    if (q->low_mark < 4)
        q->low_mark = 4;

    q->high_mark = q->n_bd / 8;
    if (q->high_mark < 2)
        q->high_mark = 2;

    q->first_empty = q->last_used = 0;
    q->reg_r = read;
    q->reg_w = write;

    ipw_write32(priv, base, q->dma_addr);
    ipw_write32(priv, size, count);
    ipw_write32(priv, read, 0);
    ipw_write32(priv, write, 0);

    _ipw_read32(priv, 0x90);
}

static int ipw_queue_tx_init(struct ipw_priv *priv,
                 struct clx2_tx_queue *q,
                 int count, u32 read, u32 write, u32 base, u32 size)
{
    struct pci_dev *dev = priv->pci_dev;

    q->txb = kmalloc(sizeof(q->txb[0]) * count, GFP_KERNEL);
    if (!q->txb) {
        IPW_ERROR("vmalloc for auxiliary BD structures failed\n");
        return -ENOMEM;
    }

    q->bd =
        pci_alloc_consistent(dev, sizeof(q->bd[0]) * count, &q->q.dma_addr);
    if (!q->bd) {
        IPW_ERROR("pci_alloc_consistent(%zd) failed\n",
              sizeof(q->bd[0]) * count);
        kfree(q->txb);
        q->txb = NULL;
        return -ENOMEM;
    }

    ipw_queue_init(priv, &q->q, count, read, write, base, size);
    return 0;
}

static void ipw_queue_tx_free_tfd(struct ipw_priv *priv,
                  struct clx2_tx_queue *txq)
{
    struct tfd_frame *bd = &txq->bd[txq->q.last_used];
    struct pci_dev *dev = priv->pci_dev;
    int i;

    /* classify bd */
    if (bd->control_flags.message_type == TX_HOST_COMMAND_TYPE)
        /* nothing to cleanup after for host commands */
        return;

    /* sanity check */
    if (le32_to_cpu(bd->u.data.num_chunks) > NUM_TFD_CHUNKS) {
        IPW_ERROR("Too many chunks: %i\n",
              le32_to_cpu(bd->u.data.num_chunks));
        return;
    }

    /* unmap chunks if any */
    for (i = 0; i < le32_to_cpu(bd->u.data.num_chunks); i++) {
        pci_unmap_single(dev, le32_to_cpu(bd->u.data.chunk_ptr[i]),
                 le16_to_cpu(bd->u.data.chunk_len[i]),
                 PCI_DMA_TODEVICE);
        if (txq->txb[txq->q.last_used]) {
            libipw_txb_free(txq->txb[txq->q.last_used]);
            txq->txb[txq->q.last_used] = NULL;
        }
    }
}

static void ipw_queue_tx_free(struct ipw_priv *priv, struct clx2_tx_queue *txq)
{
    struct clx2_queue *q = &txq->q;
    struct pci_dev *dev = priv->pci_dev;

    if (q->n_bd == 0)
        return;

    /* first, empty all BD's */
    for (; q->first_empty != q->last_used;
         q->last_used = ipw_queue_inc_wrap(q->last_used, q->n_bd)) {
        ipw_queue_tx_free_tfd(priv, txq);
    }

    /* free buffers belonging to queue itself */
    pci_free_consistent(dev, sizeof(txq->bd[0]) * q->n_bd, txq->bd,
                q->dma_addr);
    kfree(txq->txb);

    /* 0 fill whole structure */
    memset(txq, 0, sizeof(*txq));
}

static void ipw_tx_queue_free(struct ipw_priv *priv)
{
    /* Tx CMD queue */
    ipw_queue_tx_free(priv, &priv->txq_cmd);

    /* Tx queues */
    ipw_queue_tx_free(priv, &priv->txq[0]);
    ipw_queue_tx_free(priv, &priv->txq[1]);
    ipw_queue_tx_free(priv, &priv->txq[2]);
    ipw_queue_tx_free(priv, &priv->txq[3]);
}

static void ipw_create_bssid(struct ipw_priv *priv, u8 * bssid)
{
    /* First 3 bytes are manufacturer */
    bssid[0] = priv->mac_addr[0];
    bssid[1] = priv->mac_addr[1];
    bssid[2] = priv->mac_addr[2];

    /* Last bytes are random */
    get_random_bytes(&bssid[3], ETH_ALEN - 3);

    bssid[0] &= 0xfe;   /* clear multicast bit */
    bssid[0] |= 0x02;   /* set local assignment bit (IEEE802) */
}

static u8 ipw_add_station(struct ipw_priv *priv, u8 * bssid)
{
    struct ipw_station_entry entry;
    int i;

    for (i = 0; i < priv->num_stations; i++) {
        if (!memcmp(priv->stations[i], bssid, ETH_ALEN)) {
            /* Another node is active in network */
            priv->missed_adhoc_beacons = 0;
            if (!(priv->config & CFG_STATIC_CHANNEL))
                /* when other nodes drop out, we drop out */
                priv->config &= ~CFG_ADHOC_PERSIST;

            return i;
        }
    }

    if (i == MAX_STATIONS)
        return IPW_INVALID_STATION;

    IPW_DEBUG_SCAN("Adding AdHoc station: %pM\n", bssid);

    entry.reserved = 0;
    entry.support_mode = 0;
    memcpy(entry.mac_addr, bssid, ETH_ALEN);
    memcpy(priv->stations[i], bssid, ETH_ALEN);
    ipw_write_direct(priv, IPW_STATION_TABLE_LOWER + i * sizeof(entry),
             &entry, sizeof(entry));
    priv->num_stations++;

    return i;
}

static u8 ipw_find_station(struct ipw_priv *priv, u8 * bssid)
{
    int i;

    for (i = 0; i < priv->num_stations; i++)
        if (!memcmp(priv->stations[i], bssid, ETH_ALEN))
            return i;

    return IPW_INVALID_STATION;
}

static void ipw_send_disassociate(struct ipw_priv *priv, int quiet)
{
    int err;

    if (priv->status & STATUS_ASSOCIATING) {
        IPW_DEBUG_ASSOC("Disassociating while associating.\n");
        schedule_work(&priv->disassociate);
        return;
    }

    if (!(priv->status & STATUS_ASSOCIATED)) {
        IPW_DEBUG_ASSOC("Disassociating while not associated.\n");
        return;
    }

    IPW_DEBUG_ASSOC("Disassocation attempt from %pM "
            "on channel %d.\n",
            priv->assoc_request.bssid,
            priv->assoc_request.channel);

    priv->status &= ~(STATUS_ASSOCIATING | STATUS_ASSOCIATED);
    priv->status |= STATUS_DISASSOCIATING;

    if (quiet)
        priv->assoc_request.assoc_type = HC_DISASSOC_QUIET;
    else
        priv->assoc_request.assoc_type = HC_DISASSOCIATE;

    err = ipw_send_associate(priv, &priv->assoc_request);
    if (err) {
        IPW_DEBUG_HC("Attempt to send [dis]associate command "
                 "failed.\n");
        return;
    }

}

static int ipw_disassociate(void *data)
{
    struct ipw_priv *priv = data;
    if (!(priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)))
        return 0;
    ipw_send_disassociate(data, 0);
    netif_carrier_off(priv->net_dev);
    return 1;
}

static void ipw_bg_disassociate(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, disassociate);
    mutex_lock(&priv->mutex);
    ipw_disassociate(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_system_config(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, system_config);

#ifdef CONFIG_IPW2200_PROMISCUOUS
    if (priv->prom_net_dev && netif_running(priv->prom_net_dev)) {
        priv->sys_config.accept_all_data_frames = 1;
        priv->sys_config.accept_non_directed_frames = 1;
        priv->sys_config.accept_all_mgmt_bcpr = 1;
        priv->sys_config.accept_all_mgmt_frames = 1;
    }
#endif

    ipw_send_system_config(priv);
}

struct ipw_status_code {
    u16 status;
    const char *reason;
};

static const struct ipw_status_code ipw_status_codes[] = {
    {0x00, "Successful"},
    {0x01, "Unspecified failure"},
    {0x0A, "Cannot support all requested capabilities in the "
     "Capability information field"},
    {0x0B, "Reassociation denied due to inability to confirm that "
     "association exists"},
    {0x0C, "Association denied due to reason outside the scope of this "
     "standard"},
    {0x0D,
     "Responding station does not support the specified authentication "
     "algorithm"},
    {0x0E,
     "Received an Authentication frame with authentication sequence "
     "transaction sequence number out of expected sequence"},
    {0x0F, "Authentication rejected because of challenge failure"},
    {0x10, "Authentication rejected due to timeout waiting for next "
     "frame in sequence"},
    {0x11, "Association denied because AP is unable to handle additional "
     "associated stations"},
    {0x12,
     "Association denied due to requesting station not supporting all "
     "of the datarates in the BSSBasicServiceSet Parameter"},
    {0x13,
     "Association denied due to requesting station not supporting "
     "short preamble operation"},
    {0x14,
     "Association denied due to requesting station not supporting "
     "PBCC encoding"},
    {0x15,
     "Association denied due to requesting station not supporting "
     "channel agility"},
    {0x19,
     "Association denied due to requesting station not supporting "
     "short slot operation"},
    {0x1A,
     "Association denied due to requesting station not supporting "
     "DSSS-OFDM operation"},
    {0x28, "Invalid Information Element"},
    {0x29, "Group Cipher is not valid"},
    {0x2A, "Pairwise Cipher is not valid"},
    {0x2B, "AKMP is not valid"},
    {0x2C, "Unsupported RSN IE version"},
    {0x2D, "Invalid RSN IE Capabilities"},
    {0x2E, "Cipher suite is rejected per security policy"},
};

static const char *ipw_get_status_code(u16 status)
{
    int i;
    for (i = 0; i < ARRAY_SIZE(ipw_status_codes); i++)
        if (ipw_status_codes[i].status == (status & 0xff))
            return ipw_status_codes[i].reason;
    return "Unknown status value.";
}

static void inline average_init(struct average *avg)
{
    memset(avg, 0, sizeof(*avg));
}

#define DEPTH_RSSI 8
#define DEPTH_NOISE 16
static s16 exponential_average(s16 prev_avg, s16 val, u8 depth)
{
    return ((depth-1)*prev_avg +  val)/depth;
}

static void average_add(struct average *avg, s16 val)
{
    avg->sum -= avg->entries[avg->pos];
    avg->sum += val;
    avg->entries[avg->pos++] = val;
    if (unlikely(avg->pos == AVG_ENTRIES)) {
        avg->init = 1;
        avg->pos = 0;
    }
}

static s16 average_value(struct average *avg)
{
    if (!unlikely(avg->init)) {
        if (avg->pos)
            return avg->sum / avg->pos;
        return 0;
    }

    return avg->sum / AVG_ENTRIES;
}

static void ipw_reset_stats(struct ipw_priv *priv)
{
    u32 len = sizeof(u32);

    priv->quality = 0;

    average_init(&priv->average_missed_beacons);
    priv->exp_avg_rssi = -60;
    priv->exp_avg_noise = -85 + 0x100;

    priv->last_rate = 0;
    priv->last_missed_beacons = 0;
    priv->last_rx_packets = 0;
    priv->last_tx_packets = 0;
    priv->last_tx_failures = 0;

    /* Firmware managed, reset only when NIC is restarted, so we have to
     * normalize on the current value */
    ipw_get_ordinal(priv, IPW_ORD_STAT_RX_ERR_CRC,
            &priv->last_rx_err, &len);
    ipw_get_ordinal(priv, IPW_ORD_STAT_TX_FAILURE,
            &priv->last_tx_failures, &len);

    /* Driver managed, reset with each association */
    priv->missed_adhoc_beacons = 0;
    priv->missed_beacons = 0;
    priv->tx_packets = 0;
    priv->rx_packets = 0;

}

static u32 ipw_get_max_rate(struct ipw_priv *priv)
{
    u32 i = 0x80000000;
    u32 mask = priv->rates_mask;
    /* If currently associated in B mode, restrict the maximum
     * rate match to B rates */
    if (priv->assoc_request.ieee_mode == IPW_B_MODE)
        mask &= LIBIPW_CCK_RATES_MASK;

    /* TODO: Verify that the rate is supported by the current rates
     * list. */

    while (i && !(mask & i))
        i >>= 1;
    switch (i) {
    case LIBIPW_CCK_RATE_1MB_MASK:
        return 1000000;
    case LIBIPW_CCK_RATE_2MB_MASK:
        return 2000000;
    case LIBIPW_CCK_RATE_5MB_MASK:
        return 5500000;
    case LIBIPW_OFDM_RATE_6MB_MASK:
        return 6000000;
    case LIBIPW_OFDM_RATE_9MB_MASK:
        return 9000000;
    case LIBIPW_CCK_RATE_11MB_MASK:
        return 11000000;
    case LIBIPW_OFDM_RATE_12MB_MASK:
        return 12000000;
    case LIBIPW_OFDM_RATE_18MB_MASK:
        return 18000000;
    case LIBIPW_OFDM_RATE_24MB_MASK:
        return 24000000;
    case LIBIPW_OFDM_RATE_36MB_MASK:
        return 36000000;
    case LIBIPW_OFDM_RATE_48MB_MASK:
        return 48000000;
    case LIBIPW_OFDM_RATE_54MB_MASK:
        return 54000000;
    }

    if (priv->ieee->mode == IEEE_B)
        return 11000000;
    else
        return 54000000;
}

static u32 ipw_get_current_rate(struct ipw_priv *priv)
{
    u32 rate, len = sizeof(rate);
    int err;

    if (!(priv->status & STATUS_ASSOCIATED))
        return 0;

    if (priv->tx_packets > IPW_REAL_RATE_RX_PACKET_THRESHOLD) {
        err = ipw_get_ordinal(priv, IPW_ORD_STAT_TX_CURR_RATE, &rate,
                      &len);
        if (err) {
            IPW_DEBUG_INFO("failed querying ordinals.\n");
            return 0;
        }
    } else
        return ipw_get_max_rate(priv);

    switch (rate) {
    case IPW_TX_RATE_1MB:
        return 1000000;
    case IPW_TX_RATE_2MB:
        return 2000000;
    case IPW_TX_RATE_5MB:
        return 5500000;
    case IPW_TX_RATE_6MB:
        return 6000000;
    case IPW_TX_RATE_9MB:
        return 9000000;
    case IPW_TX_RATE_11MB:
        return 11000000;
    case IPW_TX_RATE_12MB:
        return 12000000;
    case IPW_TX_RATE_18MB:
        return 18000000;
    case IPW_TX_RATE_24MB:
        return 24000000;
    case IPW_TX_RATE_36MB:
        return 36000000;
    case IPW_TX_RATE_48MB:
        return 48000000;
    case IPW_TX_RATE_54MB:
        return 54000000;
    }

    return 0;
}

#define IPW_STATS_INTERVAL (2 * HZ)
static void ipw_gather_stats(struct ipw_priv *priv)
{
    u32 rx_err, rx_err_delta, rx_packets_delta;
    u32 tx_failures, tx_failures_delta, tx_packets_delta;
    u32 missed_beacons_percent, missed_beacons_delta;
    u32 quality = 0;
    u32 len = sizeof(u32);
    s16 rssi;
    u32 beacon_quality, signal_quality, tx_quality, rx_quality,
        rate_quality;
    u32 max_rate;

    if (!(priv->status & STATUS_ASSOCIATED)) {
        priv->quality = 0;
        return;
    }

    /* Update the statistics */
    ipw_get_ordinal(priv, IPW_ORD_STAT_MISSED_BEACONS,
            &priv->missed_beacons, &len);
    missed_beacons_delta = priv->missed_beacons - priv->last_missed_beacons;
    priv->last_missed_beacons = priv->missed_beacons;
    if (priv->assoc_request.beacon_interval) {
        missed_beacons_percent = missed_beacons_delta *
            (HZ * le16_to_cpu(priv->assoc_request.beacon_interval)) /
            (IPW_STATS_INTERVAL * 10);
    } else {
        missed_beacons_percent = 0;
    }
    average_add(&priv->average_missed_beacons, missed_beacons_percent);

    ipw_get_ordinal(priv, IPW_ORD_STAT_RX_ERR_CRC, &rx_err, &len);
    rx_err_delta = rx_err - priv->last_rx_err;
    priv->last_rx_err = rx_err;

    ipw_get_ordinal(priv, IPW_ORD_STAT_TX_FAILURE, &tx_failures, &len);
    tx_failures_delta = tx_failures - priv->last_tx_failures;
    priv->last_tx_failures = tx_failures;

    rx_packets_delta = priv->rx_packets - priv->last_rx_packets;
    priv->last_rx_packets = priv->rx_packets;

    tx_packets_delta = priv->tx_packets - priv->last_tx_packets;
    priv->last_tx_packets = priv->tx_packets;

    /* Calculate quality based on the following:
     *
     * Missed beacon: 100% = 0, 0% = 70% missed
     * Rate: 60% = 1Mbs, 100% = Max
     * Rx and Tx errors represent a straight % of total Rx/Tx
     * RSSI: 100% = > -50,  0% = < -80
     * Rx errors: 100% = 0, 0% = 50% missed
     *
     * The lowest computed quality is used.
     *
     */
#define BEACON_THRESHOLD 5
    beacon_quality = 100 - missed_beacons_percent;
    if (beacon_quality < BEACON_THRESHOLD)
        beacon_quality = 0;
    else
        beacon_quality = (beacon_quality - BEACON_THRESHOLD) * 100 /
            (100 - BEACON_THRESHOLD);
    IPW_DEBUG_STATS("Missed beacon: %3d%% (%d%%)\n",
            beacon_quality, missed_beacons_percent);

    priv->last_rate = ipw_get_current_rate(priv);
    max_rate = ipw_get_max_rate(priv);
    rate_quality = priv->last_rate * 40 / max_rate + 60;
    IPW_DEBUG_STATS("Rate quality : %3d%% (%dMbs)\n",
            rate_quality, priv->last_rate / 1000000);

    if (rx_packets_delta > 100 && rx_packets_delta + rx_err_delta)
        rx_quality = 100 - (rx_err_delta * 100) /
            (rx_packets_delta + rx_err_delta);
    else
        rx_quality = 100;
    IPW_DEBUG_STATS("Rx quality   : %3d%% (%u errors, %u packets)\n",
            rx_quality, rx_err_delta, rx_packets_delta);

    if (tx_packets_delta > 100 && tx_packets_delta + tx_failures_delta)
        tx_quality = 100 - (tx_failures_delta * 100) /
            (tx_packets_delta + tx_failures_delta);
    else
        tx_quality = 100;
    IPW_DEBUG_STATS("Tx quality   : %3d%% (%u errors, %u packets)\n",
            tx_quality, tx_failures_delta, tx_packets_delta);

    rssi = priv->exp_avg_rssi;
    signal_quality =
        (100 *
         (priv->ieee->perfect_rssi - priv->ieee->worst_rssi) *
         (priv->ieee->perfect_rssi - priv->ieee->worst_rssi) -
         (priv->ieee->perfect_rssi - rssi) *
         (15 * (priv->ieee->perfect_rssi - priv->ieee->worst_rssi) +
          62 * (priv->ieee->perfect_rssi - rssi))) /
        ((priv->ieee->perfect_rssi - priv->ieee->worst_rssi) *
         (priv->ieee->perfect_rssi - priv->ieee->worst_rssi));
    if (signal_quality > 100)
        signal_quality = 100;
    else if (signal_quality < 1)
        signal_quality = 0;

    IPW_DEBUG_STATS("Signal level : %3d%% (%d dBm)\n",
            signal_quality, rssi);

    quality = min(rx_quality, signal_quality);
    quality = min(tx_quality, quality);
    quality = min(rate_quality, quality);
    quality = min(beacon_quality, quality);
    if (quality == beacon_quality)
        IPW_DEBUG_STATS("Quality (%d%%): Clamped to missed beacons.\n",
                quality);
    if (quality == rate_quality)
        IPW_DEBUG_STATS("Quality (%d%%): Clamped to rate quality.\n",
                quality);
    if (quality == tx_quality)
        IPW_DEBUG_STATS("Quality (%d%%): Clamped to Tx quality.\n",
                quality);
    if (quality == rx_quality)
        IPW_DEBUG_STATS("Quality (%d%%): Clamped to Rx quality.\n",
                quality);
    if (quality == signal_quality)
        IPW_DEBUG_STATS("Quality (%d%%): Clamped to signal quality.\n",
                quality);

    priv->quality = quality;

    schedule_delayed_work(&priv->gather_stats, IPW_STATS_INTERVAL);
}

static void ipw_bg_gather_stats(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, gather_stats.work);
    mutex_lock(&priv->mutex);
    ipw_gather_stats(priv);
    mutex_unlock(&priv->mutex);
}

/* Missed beacon behavior:
 * 1st missed -> roaming_threshold, just wait, don't do any scan/roam.
 * roaming_threshold -> disassociate_threshold, scan and roam for better signal.
 * Above disassociate threshold, give up and stop scanning.
 * Roaming is disabled if disassociate_threshold <= roaming_threshold  */
static void ipw_handle_missed_beacon(struct ipw_priv *priv,
                        int missed_count)
{
    priv->notif_missed_beacons = missed_count;

    if (missed_count > priv->disassociate_threshold &&
        priv->status & STATUS_ASSOCIATED) {
        /* If associated and we've hit the missed
         * beacon threshold, disassociate, turn
         * off roaming, and abort any active scans */
        IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF |
              IPW_DL_STATE | IPW_DL_ASSOC,
              "Missed beacon: %d - disassociate\n", missed_count);
        priv->status &= ~STATUS_ROAMING;
        if (priv->status & STATUS_SCANNING) {
            IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF |
                  IPW_DL_STATE,
                  "Aborting scan with missed beacon.\n");
            schedule_work(&priv->abort_scan);
        }

        schedule_work(&priv->disassociate);
        return;
    }

    if (priv->status & STATUS_ROAMING) {
        /* If we are currently roaming, then just
         * print a debug statement... */
        IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
              "Missed beacon: %d - roam in progress\n",
              missed_count);
        return;
    }

    if (roaming &&
        (missed_count > priv->roaming_threshold &&
         missed_count <= priv->disassociate_threshold)) {
        /* If we are not already roaming, set the ROAM
         * bit in the status and kick off a scan.
         * This can happen several times before we reach
         * disassociate_threshold. */
        IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
              "Missed beacon: %d - initiate "
              "roaming\n", missed_count);
        if (!(priv->status & STATUS_ROAMING)) {
            priv->status |= STATUS_ROAMING;
            if (!(priv->status & STATUS_SCANNING))
                schedule_delayed_work(&priv->request_scan, 0);
        }
        return;
    }

    if (priv->status & STATUS_SCANNING &&
        missed_count > IPW_MB_SCAN_CANCEL_THRESHOLD) {
        /* Stop scan to keep fw from getting
         * stuck (only if we aren't roaming --
         * otherwise we'll never scan more than 2 or 3
         * channels..) */
        IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF | IPW_DL_STATE,
              "Aborting scan with missed beacon.\n");
        schedule_work(&priv->abort_scan);
    }

    IPW_DEBUG_NOTIF("Missed beacon: %d\n", missed_count);
}

static void ipw_scan_event(struct work_struct *work)
{
    union iwreq_data wrqu;

    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, scan_event.work);

    wrqu.data.length = 0;
    wrqu.data.flags = 0;
    wireless_send_event(priv->net_dev, SIOCGIWSCAN, &wrqu, NULL);
}

static void handle_scan_event(struct ipw_priv *priv)
{
    /* Only userspace-requested scan completion events go out immediately */
    if (!priv->user_requested_scan) {
        if (!delayed_work_pending(&priv->scan_event))
            schedule_delayed_work(&priv->scan_event,
                          round_jiffies_relative(msecs_to_jiffies(4000)));
    } else {
        union iwreq_data wrqu;

        priv->user_requested_scan = 0;
        cancel_delayed_work(&priv->scan_event);

        wrqu.data.length = 0;
        wrqu.data.flags = 0;
        wireless_send_event(priv->net_dev, SIOCGIWSCAN, &wrqu, NULL);
    }
}

static void ipw_rx_notification(struct ipw_priv *priv,
                       struct ipw_rx_notification *notif)
{
    DECLARE_SSID_BUF(ssid);
    u16 size = le16_to_cpu(notif->size);

    IPW_DEBUG_NOTIF("type = %i (%d bytes)\n", notif->subtype, size);

    switch (notif->subtype) {
    case HOST_NOTIFICATION_STATUS_ASSOCIATED:{
            struct notif_association *assoc = &notif->u.assoc;

            switch (assoc->state) {
            case CMAS_ASSOCIATED:{
                    IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                          IPW_DL_ASSOC,
                          "associated: '%s' %pM\n",
                          print_ssid(ssid, priv->essid,
                                 priv->essid_len),
                          priv->bssid);

                    switch (priv->ieee->iw_mode) {
                    case IW_MODE_INFRA:
                        memcpy(priv->ieee->bssid,
                               priv->bssid, ETH_ALEN);
                        break;

                    case IW_MODE_ADHOC:
                        memcpy(priv->ieee->bssid,
                               priv->bssid, ETH_ALEN);

                        /* clear out the station table */
                        priv->num_stations = 0;

                        IPW_DEBUG_ASSOC
                            ("queueing adhoc check\n");
                        schedule_delayed_work(
                            &priv->adhoc_check,
                            le16_to_cpu(priv->
                            assoc_request.
                            beacon_interval));
                        break;
                    }

                    priv->status &= ~STATUS_ASSOCIATING;
                    priv->status |= STATUS_ASSOCIATED;
                    schedule_work(&priv->system_config);

#ifdef CONFIG_IPW2200_QOS
#define IPW_GET_PACKET_STYPE(x) WLAN_FC_GET_STYPE( \
             le16_to_cpu(((struct ieee80211_hdr *)(x))->frame_control))
                    if ((priv->status & STATUS_AUTH) &&
                        (IPW_GET_PACKET_STYPE(&notif->u.raw)
                         == IEEE80211_STYPE_ASSOC_RESP)) {
                        if ((sizeof
                             (struct
                              libipw_assoc_response)
                             <= size)
                            && (size <= 2314)) {
                            struct
                            libipw_rx_stats
                                stats = {
                                .len = size - 1,
                            };

                            IPW_DEBUG_QOS
                                ("QoS Associate "
                                 "size %d\n", size);
                            libipw_rx_mgt(priv->
                                     ieee,
                                     (struct
                                      libipw_hdr_4addr
                                      *)
                                     &notif->u.raw, &stats);
                        }
                    }
#endif

                    schedule_work(&priv->link_up);

                    break;
                }

            case CMAS_AUTHENTICATED:{
                    if (priv->
                        status & (STATUS_ASSOCIATED |
                              STATUS_AUTH)) {
                        struct notif_authenticate *auth
                            = &notif->u.auth;
                        IPW_DEBUG(IPW_DL_NOTIF |
                              IPW_DL_STATE |
                              IPW_DL_ASSOC,
                              "deauthenticated: '%s' "
                              "%pM"
                              ": (0x%04X) - %s\n",
                              print_ssid(ssid,
                                     priv->
                                     essid,
                                     priv->
                                     essid_len),
                              priv->bssid,
                              le16_to_cpu(auth->status),
                              ipw_get_status_code
                              (le16_to_cpu
                               (auth->status)));

                        priv->status &=
                            ~(STATUS_ASSOCIATING |
                              STATUS_AUTH |
                              STATUS_ASSOCIATED);

                        schedule_work(&priv->link_down);
                        break;
                    }

                    IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                          IPW_DL_ASSOC,
                          "authenticated: '%s' %pM\n",
                          print_ssid(ssid, priv->essid,
                                 priv->essid_len),
                          priv->bssid);
                    break;
                }

            case CMAS_INIT:{
                    if (priv->status & STATUS_AUTH) {
                        struct
                            libipw_assoc_response
                        *resp;
                        resp =
                            (struct
                             libipw_assoc_response
                             *)&notif->u.raw;
                        IPW_DEBUG(IPW_DL_NOTIF |
                              IPW_DL_STATE |
                              IPW_DL_ASSOC,
                              "association failed (0x%04X): %s\n",
                              le16_to_cpu(resp->status),
                              ipw_get_status_code
                              (le16_to_cpu
                               (resp->status)));
                    }

                    IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                          IPW_DL_ASSOC,
                          "disassociated: '%s' %pM\n",
                          print_ssid(ssid, priv->essid,
                                 priv->essid_len),
                          priv->bssid);

                    priv->status &=
                        ~(STATUS_DISASSOCIATING |
                          STATUS_ASSOCIATING |
                          STATUS_ASSOCIATED | STATUS_AUTH);
                    if (priv->assoc_network
                        && (priv->assoc_network->
                        capability &
                        WLAN_CAPABILITY_IBSS))
                        ipw_remove_current_network
                            (priv);

                    schedule_work(&priv->link_down);

                    break;
                }

            case CMAS_RX_ASSOC_RESP:
                break;

            default:
                IPW_ERROR("assoc: unknown (%d)\n",
                      assoc->state);
                break;
            }

            break;
        }

    case HOST_NOTIFICATION_STATUS_AUTHENTICATE:{
            struct notif_authenticate *auth = &notif->u.auth;
            switch (auth->state) {
            case CMAS_AUTHENTICATED:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
                      "authenticated: '%s' %pM\n",
                      print_ssid(ssid, priv->essid,
                             priv->essid_len),
                      priv->bssid);
                priv->status |= STATUS_AUTH;
                break;

            case CMAS_INIT:
                if (priv->status & STATUS_AUTH) {
                    IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                          IPW_DL_ASSOC,
                          "authentication failed (0x%04X): %s\n",
                          le16_to_cpu(auth->status),
                          ipw_get_status_code(le16_to_cpu
                                      (auth->
                                       status)));
                }
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC,
                      "deauthenticated: '%s' %pM\n",
                      print_ssid(ssid, priv->essid,
                             priv->essid_len),
                      priv->bssid);

                priv->status &= ~(STATUS_ASSOCIATING |
                          STATUS_AUTH |
                          STATUS_ASSOCIATED);

                schedule_work(&priv->link_down);
                break;

            case CMAS_TX_AUTH_SEQ_1:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "AUTH_SEQ_1\n");
                break;
            case CMAS_RX_AUTH_SEQ_2:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "AUTH_SEQ_2\n");
                break;
            case CMAS_AUTH_SEQ_1_PASS:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "AUTH_SEQ_1_PASS\n");
                break;
            case CMAS_AUTH_SEQ_1_FAIL:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "AUTH_SEQ_1_FAIL\n");
                break;
            case CMAS_TX_AUTH_SEQ_3:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "AUTH_SEQ_3\n");
                break;
            case CMAS_RX_AUTH_SEQ_4:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "RX_AUTH_SEQ_4\n");
                break;
            case CMAS_AUTH_SEQ_2_PASS:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "AUTH_SEQ_2_PASS\n");
                break;
            case CMAS_AUTH_SEQ_2_FAIL:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "AUT_SEQ_2_FAIL\n");
                break;
            case CMAS_TX_ASSOC:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "TX_ASSOC\n");
                break;
            case CMAS_RX_ASSOC_RESP:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "RX_ASSOC_RESP\n");

                break;
            case CMAS_ASSOCIATED:
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE |
                      IPW_DL_ASSOC, "ASSOCIATED\n");
                break;
            default:
                IPW_DEBUG_NOTIF("auth: failure - %d\n",
                        auth->state);
                break;
            }
            break;
        }

    case HOST_NOTIFICATION_STATUS_SCAN_CHANNEL_RESULT:{
            struct notif_channel_result *x =
                &notif->u.channel_result;

            if (size == sizeof(*x)) {
                IPW_DEBUG_SCAN("Scan result for channel %d\n",
                           x->channel_num);
            } else {
                IPW_DEBUG_SCAN("Scan result of wrong size %d "
                           "(should be %zd)\n",
                           size, sizeof(*x));
            }
            break;
        }

    case HOST_NOTIFICATION_STATUS_SCAN_COMPLETED:{
            struct notif_scan_complete *x = &notif->u.scan_complete;
            if (size == sizeof(*x)) {
                IPW_DEBUG_SCAN
                    ("Scan completed: type %d, %d channels, "
                     "%d status\n", x->scan_type,
                     x->num_channels, x->status);
            } else {
                IPW_ERROR("Scan completed of wrong size %d "
                      "(should be %zd)\n",
                      size, sizeof(*x));
            }

            priv->status &=
                ~(STATUS_SCANNING | STATUS_SCAN_ABORTING);

            wake_up_interruptible(&priv->wait_state);
            cancel_delayed_work(&priv->scan_check);

            if (priv->status & STATUS_EXIT_PENDING)
                break;

            priv->ieee->scans++;

#ifdef CONFIG_IPW2200_MONITOR
            if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
                priv->status |= STATUS_SCAN_FORCED;
                schedule_delayed_work(&priv->request_scan, 0);
                break;
            }
            priv->status &= ~STATUS_SCAN_FORCED;
#endif              /* CONFIG_IPW2200_MONITOR */

            /* Do queued direct scans first */
            if (priv->status & STATUS_DIRECT_SCAN_PENDING)
                schedule_delayed_work(&priv->request_direct_scan, 0);

            if (!(priv->status & (STATUS_ASSOCIATED |
                          STATUS_ASSOCIATING |
                          STATUS_ROAMING |
                          STATUS_DISASSOCIATING)))
                schedule_work(&priv->associate);
            else if (priv->status & STATUS_ROAMING) {
                if (x->status == SCAN_COMPLETED_STATUS_COMPLETE)
                    /* If a scan completed and we are in roam mode, then
                     * the scan that completed was the one requested as a
                     * result of entering roam... so, schedule the
                     * roam work */
                    schedule_work(&priv->roam);
                else
                    /* Don't schedule if we aborted the scan */
                    priv->status &= ~STATUS_ROAMING;
            } else if (priv->status & STATUS_SCAN_PENDING)
                schedule_delayed_work(&priv->request_scan, 0);
            else if (priv->config & CFG_BACKGROUND_SCAN
                 && priv->status & STATUS_ASSOCIATED)
                schedule_delayed_work(&priv->request_scan,
                              round_jiffies_relative(HZ));

            /* Send an empty event to user space.
             * We don't send the received data on the event because
             * it would require us to do complex transcoding, and
             * we want to minimise the work done in the irq handler
             * Use a request to extract the data.
             * Also, we generate this even for any scan, regardless
             * on how the scan was initiated. User space can just
             * sync on periodic scan to get fresh data...
             * Jean II */
            if (x->status == SCAN_COMPLETED_STATUS_COMPLETE)
                handle_scan_event(priv);
            break;
        }

    case HOST_NOTIFICATION_STATUS_FRAG_LENGTH:{
            struct notif_frag_length *x = &notif->u.frag_len;

            if (size == sizeof(*x))
                IPW_ERROR("Frag length: %d\n",
                      le16_to_cpu(x->frag_length));
            else
                IPW_ERROR("Frag length of wrong size %d "
                      "(should be %zd)\n",
                      size, sizeof(*x));
            break;
        }

    case HOST_NOTIFICATION_STATUS_LINK_DETERIORATION:{
            struct notif_link_deterioration *x =
                &notif->u.link_deterioration;

            if (size == sizeof(*x)) {
                IPW_DEBUG(IPW_DL_NOTIF | IPW_DL_STATE,
                    "link deterioration: type %d, cnt %d\n",
                    x->silence_notification_type,
                    x->silence_count);
                memcpy(&priv->last_link_deterioration, x,
                       sizeof(*x));
            } else {
                IPW_ERROR("Link Deterioration of wrong size %d "
                      "(should be %zd)\n",
                      size, sizeof(*x));
            }
            break;
        }

    case HOST_NOTIFICATION_DINO_CONFIG_RESPONSE:{
            IPW_ERROR("Dino config\n");
            if (priv->hcmd
                && priv->hcmd->cmd != HOST_CMD_DINO_CONFIG)
                IPW_ERROR("Unexpected DINO_CONFIG_RESPONSE\n");

            break;
        }

    case HOST_NOTIFICATION_STATUS_BEACON_STATE:{
            struct notif_beacon_state *x = &notif->u.beacon_state;
            if (size != sizeof(*x)) {
                IPW_ERROR
                    ("Beacon state of wrong size %d (should "
                     "be %zd)\n", size, sizeof(*x));
                break;
            }

            if (le32_to_cpu(x->state) ==
                HOST_NOTIFICATION_STATUS_BEACON_MISSING)
                ipw_handle_missed_beacon(priv,
                             le32_to_cpu(x->
                                     number));

            break;
        }

    case HOST_NOTIFICATION_STATUS_TGI_TX_KEY:{
            struct notif_tgi_tx_key *x = &notif->u.tgi_tx_key;
            if (size == sizeof(*x)) {
                IPW_ERROR("TGi Tx Key: state 0x%02x sec type "
                      "0x%02x station %d\n",
                      x->key_state, x->security_type,
                      x->station_index);
                break;
            }

            IPW_ERROR
                ("TGi Tx Key of wrong size %d (should be %zd)\n",
                 size, sizeof(*x));
            break;
        }

    case HOST_NOTIFICATION_CALIB_KEEP_RESULTS:{
            struct notif_calibration *x = &notif->u.calibration;

            if (size == sizeof(*x)) {
                memcpy(&priv->calib, x, sizeof(*x));
                IPW_DEBUG_INFO("TODO: Calibration\n");
                break;
            }

            IPW_ERROR
                ("Calibration of wrong size %d (should be %zd)\n",
                 size, sizeof(*x));
            break;
        }

    case HOST_NOTIFICATION_NOISE_STATS:{
            if (size == sizeof(u32)) {
                priv->exp_avg_noise =
                    exponential_average(priv->exp_avg_noise,
                    (u8) (le32_to_cpu(notif->u.noise.value) & 0xff),
                    DEPTH_NOISE);
                break;
            }

            IPW_ERROR
                ("Noise stat is wrong size %d (should be %zd)\n",
                 size, sizeof(u32));
            break;
        }

    default:
        IPW_DEBUG_NOTIF("Unknown notification: "
                "subtype=%d,flags=0x%2x,size=%d\n",
                notif->subtype, notif->flags, size);
    }
}

static int ipw_queue_reset(struct ipw_priv *priv)
{
    int rc = 0;
    int nTx = 64, nTxCmd = 8;
    ipw_tx_queue_free(priv);
    /* Tx CMD queue */
    rc = ipw_queue_tx_init(priv, &priv->txq_cmd, nTxCmd,
                   IPW_TX_CMD_QUEUE_READ_INDEX,
                   IPW_TX_CMD_QUEUE_WRITE_INDEX,
                   IPW_TX_CMD_QUEUE_BD_BASE,
                   IPW_TX_CMD_QUEUE_BD_SIZE);
    if (rc) {
        IPW_ERROR("Tx Cmd queue init failed\n");
        goto error;
    }
    /* Tx queue(s) */
    rc = ipw_queue_tx_init(priv, &priv->txq[0], nTx,
                   IPW_TX_QUEUE_0_READ_INDEX,
                   IPW_TX_QUEUE_0_WRITE_INDEX,
                   IPW_TX_QUEUE_0_BD_BASE, IPW_TX_QUEUE_0_BD_SIZE);
    if (rc) {
        IPW_ERROR("Tx 0 queue init failed\n");
        goto error;
    }
    rc = ipw_queue_tx_init(priv, &priv->txq[1], nTx,
                   IPW_TX_QUEUE_1_READ_INDEX,
                   IPW_TX_QUEUE_1_WRITE_INDEX,
                   IPW_TX_QUEUE_1_BD_BASE, IPW_TX_QUEUE_1_BD_SIZE);
    if (rc) {
        IPW_ERROR("Tx 1 queue init failed\n");
        goto error;
    }
    rc = ipw_queue_tx_init(priv, &priv->txq[2], nTx,
                   IPW_TX_QUEUE_2_READ_INDEX,
                   IPW_TX_QUEUE_2_WRITE_INDEX,
                   IPW_TX_QUEUE_2_BD_BASE, IPW_TX_QUEUE_2_BD_SIZE);
    if (rc) {
        IPW_ERROR("Tx 2 queue init failed\n");
        goto error;
    }
    rc = ipw_queue_tx_init(priv, &priv->txq[3], nTx,
                   IPW_TX_QUEUE_3_READ_INDEX,
                   IPW_TX_QUEUE_3_WRITE_INDEX,
                   IPW_TX_QUEUE_3_BD_BASE, IPW_TX_QUEUE_3_BD_SIZE);
    if (rc) {
        IPW_ERROR("Tx 3 queue init failed\n");
        goto error;
    }
    /* statistics */
    priv->rx_bufs_min = 0;
    priv->rx_pend_max = 0;
    return rc;

      error:
    ipw_tx_queue_free(priv);
    return rc;
}

static int ipw_queue_tx_reclaim(struct ipw_priv *priv,
                struct clx2_tx_queue *txq, int qindex)
{
    u32 hw_tail;
    int used;
    struct clx2_queue *q = &txq->q;

    hw_tail = ipw_read32(priv, q->reg_r);
    if (hw_tail >= q->n_bd) {
        IPW_ERROR
            ("Read index for DMA queue (%d) is out of range [0-%d)\n",
             hw_tail, q->n_bd);
        goto done;
    }
    for (; q->last_used != hw_tail;
         q->last_used = ipw_queue_inc_wrap(q->last_used, q->n_bd)) {
        ipw_queue_tx_free_tfd(priv, txq);
        priv->tx_packets++;
    }
      done:
    if ((ipw_tx_queue_space(q) > q->low_mark) &&
        (qindex >= 0))
        netif_wake_queue(priv->net_dev);
    used = q->first_empty - q->last_used;
    if (used < 0)
        used += q->n_bd;

    return used;
}

static int ipw_queue_tx_hcmd(struct ipw_priv *priv, int hcmd, void *buf,
                 int len, int sync)
{
    struct clx2_tx_queue *txq = &priv->txq_cmd;
    struct clx2_queue *q = &txq->q;
    struct tfd_frame *tfd;

    if (ipw_tx_queue_space(q) < (sync ? 1 : 2)) {
        IPW_ERROR("No space for Tx\n");
        return -EBUSY;
    }

    tfd = &txq->bd[q->first_empty];
    txq->txb[q->first_empty] = NULL;

    memset(tfd, 0, sizeof(*tfd));
    tfd->control_flags.message_type = TX_HOST_COMMAND_TYPE;
    tfd->control_flags.control_bits = TFD_NEED_IRQ_MASK;
    priv->hcmd_seq++;
    tfd->u.cmd.index = hcmd;
    tfd->u.cmd.length = len;
    memcpy(tfd->u.cmd.payload, buf, len);
    q->first_empty = ipw_queue_inc_wrap(q->first_empty, q->n_bd);
    ipw_write32(priv, q->reg_w, q->first_empty);
    _ipw_read32(priv, 0x90);

    return 0;
}

/*
 * Rx theory of operation
 *
 * The host allocates 32 DMA target addresses and passes the host address
 * to the firmware at register IPW_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 * 0 to 31
 *
 * Rx Queue Indexes
 * The host/firmware share two index registers for managing the Rx buffers.
 *
 * The READ index maps to the first position that the firmware may be writing
 * to -- the driver can read up to (but not including) this position and get
 * good data.
 * The READ index is managed by the firmware once the card is enabled.
 *
 * The WRITE index maps to the last position the driver has read from -- the
 * position preceding WRITE is the last slot the firmware can place a packet.
 *
 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 * WRITE = READ.
 *
 * During initialization the host sets up the READ queue position to the first
 * INDEX position, and WRITE to the last (READ - 1 wrapped)
 *
 * When the firmware places a packet in a buffer it will advance the READ index
 * and fire the RX interrupt.  The driver can then query the READ index and
 * process as many packets as possible, moving the WRITE index forward as it
 * resets the Rx queue buffers with new memory.
 *
 * The management in the driver is as follows:
 * + A list of pre-allocated SKBs is stored in ipw->rxq->rx_free.  When
 *   ipw->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 *   to replensish the ipw->rxq->rx_free.
 * + In ipw_rx_queue_replenish (scheduled) if 'processed' != 'read' then the
 *   ipw->rxq is replenished and the READ INDEX is updated (updating the
 *   'processed' and 'read' driver indexes as well)
 * + A received packet is processed and handed to the kernel network stack,
 *   detached from the ipw->rxq.  The driver 'processed' index is updated.
 * + The Host/Firmware ipw->rxq is replenished at tasklet time from the rx_free
 *   list. If there are no allocated buffers in ipw->rxq->rx_free, the READ
 *   INDEX is not incremented and ipw->status(RX_STALLED) is set.  If there
 *   were enough free buffers and RX_STALLED is set it is cleared.
 *
 *
 * Driver sequence:
 *
 * ipw_rx_queue_alloc()       Allocates rx_free
 * ipw_rx_queue_replenish()   Replenishes rx_free list from rx_used, and calls
 *                            ipw_rx_queue_restock
 * ipw_rx_queue_restock()     Moves available buffers from rx_free into Rx
 *                            queue, updates firmware pointers, and updates
 *                            the WRITE index.  If insufficient rx_free buffers
 *                            are available, schedules ipw_rx_queue_replenish
 *
 * -- enable interrupts --
 * ISR - ipw_rx()             Detach ipw_rx_mem_buffers from pool up to the
 *                            READ INDEX, detaching the SKB from the pool.
 *                            Moves the packet buffer from queue to rx_used.
 *                            Calls ipw_rx_queue_restock to refill any empty
 *                            slots.
 * ...
 *
 */

/*
 * If there are slots in the RX queue that  need to be restocked,
 * and we have free pre-allocated buffers, fill the ranks as much
 * as we can pulling from rx_free.
 *
 * This moves the 'write' index forward to catch up with 'processed', and
 * also updates the memory address in the firmware to reference the new
 * target buffer.
 */
static void ipw_rx_queue_restock(struct ipw_priv *priv)
{
    struct ipw_rx_queue *rxq = priv->rxq;
    struct list_head *element;
    struct ipw_rx_mem_buffer *rxb;
    unsigned long flags;
    int write;

    spin_lock_irqsave(&rxq->lock, flags);
    write = rxq->write;
    while ((ipw_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
        element = rxq->rx_free.next;
        rxb = list_entry(element, struct ipw_rx_mem_buffer, list);
        list_del(element);

        ipw_write32(priv, IPW_RFDS_TABLE_LOWER + rxq->write * RFD_SIZE,
                rxb->dma_addr);
        rxq->queue[rxq->write] = rxb;
        rxq->write = (rxq->write + 1) % RX_QUEUE_SIZE;
        rxq->free_count--;
    }
    spin_unlock_irqrestore(&rxq->lock, flags);

    /* If the pre-allocated buffer pool is dropping low, schedule to
     * refill it */
    if (rxq->free_count <= RX_LOW_WATERMARK)
        schedule_work(&priv->rx_replenish);

    /* If we've added more space for the firmware to place data, tell it */
    if (write != rxq->write)
        ipw_write32(priv, IPW_RX_WRITE_INDEX, rxq->write);
}

/*
 * Move all used packet from rx_used to rx_free, allocating a new SKB for each.
 * Also restock the Rx queue via ipw_rx_queue_restock.
 *
 * This is called as a scheduled work item (except for during intialization)
 */
static void ipw_rx_queue_replenish(void *data)
{
    struct ipw_priv *priv = data;
    struct ipw_rx_queue *rxq = priv->rxq;
    struct list_head *element;
    struct ipw_rx_mem_buffer *rxb;
    unsigned long flags;

    spin_lock_irqsave(&rxq->lock, flags);
    while (!list_empty(&rxq->rx_used)) {
        element = rxq->rx_used.next;
        rxb = list_entry(element, struct ipw_rx_mem_buffer, list);
        rxb->skb = alloc_skb(IPW_RX_BUF_SIZE, GFP_ATOMIC);
        if (!rxb->skb) {
            printk(KERN_CRIT "%s: Can not allocate SKB buffers.\n",
                   priv->net_dev->name);
            /* We don't reschedule replenish work here -- we will
             * call the restock method and if it still needs
             * more buffers it will schedule replenish */
            break;
        }
        list_del(element);

        rxb->dma_addr =
            pci_map_single(priv->pci_dev, rxb->skb->data,
                   IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);

        list_add_tail(&rxb->list, &rxq->rx_free);
        rxq->free_count++;
    }
    spin_unlock_irqrestore(&rxq->lock, flags);

    ipw_rx_queue_restock(priv);
}

static void ipw_bg_rx_queue_replenish(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, rx_replenish);
    mutex_lock(&priv->mutex);
    ipw_rx_queue_replenish(priv);
    mutex_unlock(&priv->mutex);
}

/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
 * This free routine walks the list of POOL entries and if SKB is set to
 * non NULL it is unmapped and freed
 */
static void ipw_rx_queue_free(struct ipw_priv *priv, struct ipw_rx_queue *rxq)
{
    int i;

    if (!rxq)
        return;

    for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
        if (rxq->pool[i].skb != NULL) {
            pci_unmap_single(priv->pci_dev, rxq->pool[i].dma_addr,
                     IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
            dev_kfree_skb(rxq->pool[i].skb);
        }
    }

    kfree(rxq);
}

static struct ipw_rx_queue *ipw_rx_queue_alloc(struct ipw_priv *priv)
{
    struct ipw_rx_queue *rxq;
    int i;

    rxq = kzalloc(sizeof(*rxq), GFP_KERNEL);
    if (unlikely(!rxq)) {
        IPW_ERROR("memory allocation failed\n");
        return NULL;
    }
    spin_lock_init(&rxq->lock);
    INIT_LIST_HEAD(&rxq->rx_free);
    INIT_LIST_HEAD(&rxq->rx_used);

    /* Fill the rx_used queue with _all_ of the Rx buffers */
    for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
        list_add_tail(&rxq->pool[i].list, &rxq->rx_used);

    /* Set us so that we have processed and used all buffers, but have
     * not restocked the Rx queue with fresh buffers */
    rxq->read = rxq->write = 0;
    rxq->free_count = 0;

    return rxq;
}

static int ipw_is_rate_in_mask(struct ipw_priv *priv, int ieee_mode, u8 rate)
{
    rate &= ~LIBIPW_BASIC_RATE_MASK;
    if (ieee_mode == IEEE_A) {
        switch (rate) {
        case LIBIPW_OFDM_RATE_6MB:
            return priv->rates_mask & LIBIPW_OFDM_RATE_6MB_MASK ?
                1 : 0;
        case LIBIPW_OFDM_RATE_9MB:
            return priv->rates_mask & LIBIPW_OFDM_RATE_9MB_MASK ?
                1 : 0;
        case LIBIPW_OFDM_RATE_12MB:
            return priv->
                rates_mask & LIBIPW_OFDM_RATE_12MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_18MB:
            return priv->
                rates_mask & LIBIPW_OFDM_RATE_18MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_24MB:
            return priv->
                rates_mask & LIBIPW_OFDM_RATE_24MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_36MB:
            return priv->
                rates_mask & LIBIPW_OFDM_RATE_36MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_48MB:
            return priv->
                rates_mask & LIBIPW_OFDM_RATE_48MB_MASK ? 1 : 0;
        case LIBIPW_OFDM_RATE_54MB:
            return priv->
                rates_mask & LIBIPW_OFDM_RATE_54MB_MASK ? 1 : 0;
        default:
            return 0;
        }
    }

    /* B and G mixed */
    switch (rate) {
    case LIBIPW_CCK_RATE_1MB:
        return priv->rates_mask & LIBIPW_CCK_RATE_1MB_MASK ? 1 : 0;
    case LIBIPW_CCK_RATE_2MB:
        return priv->rates_mask & LIBIPW_CCK_RATE_2MB_MASK ? 1 : 0;
    case LIBIPW_CCK_RATE_5MB:
        return priv->rates_mask & LIBIPW_CCK_RATE_5MB_MASK ? 1 : 0;
    case LIBIPW_CCK_RATE_11MB:
        return priv->rates_mask & LIBIPW_CCK_RATE_11MB_MASK ? 1 : 0;
    }

    /* If we are limited to B modulations, bail at this point */
    if (ieee_mode == IEEE_B)
        return 0;

    /* G */
    switch (rate) {
    case LIBIPW_OFDM_RATE_6MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_6MB_MASK ? 1 : 0;
    case LIBIPW_OFDM_RATE_9MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_9MB_MASK ? 1 : 0;
    case LIBIPW_OFDM_RATE_12MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_12MB_MASK ? 1 : 0;
    case LIBIPW_OFDM_RATE_18MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_18MB_MASK ? 1 : 0;
    case LIBIPW_OFDM_RATE_24MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_24MB_MASK ? 1 : 0;
    case LIBIPW_OFDM_RATE_36MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_36MB_MASK ? 1 : 0;
    case LIBIPW_OFDM_RATE_48MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_48MB_MASK ? 1 : 0;
    case LIBIPW_OFDM_RATE_54MB:
        return priv->rates_mask & LIBIPW_OFDM_RATE_54MB_MASK ? 1 : 0;
    }

    return 0;
}

static int ipw_compatible_rates(struct ipw_priv *priv,
                const struct libipw_network *network,
                struct ipw_supported_rates *rates)
{
    int num_rates, i;

    memset(rates, 0, sizeof(*rates));
    num_rates = min(network->rates_len, (u8) IPW_MAX_RATES);
    rates->num_rates = 0;
    for (i = 0; i < num_rates; i++) {
        if (!ipw_is_rate_in_mask(priv, network->mode,
                     network->rates[i])) {

            if (network->rates[i] & LIBIPW_BASIC_RATE_MASK) {
                IPW_DEBUG_SCAN("Adding masked mandatory "
                           "rate %02X\n",
                           network->rates[i]);
                rates->supported_rates[rates->num_rates++] =
                    network->rates[i];
                continue;
            }

            IPW_DEBUG_SCAN("Rate %02X masked : 0x%08X\n",
                       network->rates[i], priv->rates_mask);
            continue;
        }

        rates->supported_rates[rates->num_rates++] = network->rates[i];
    }

    num_rates = min(network->rates_ex_len,
            (u8) (IPW_MAX_RATES - num_rates));
    for (i = 0; i < num_rates; i++) {
        if (!ipw_is_rate_in_mask(priv, network->mode,
                     network->rates_ex[i])) {
            if (network->rates_ex[i] & LIBIPW_BASIC_RATE_MASK) {
                IPW_DEBUG_SCAN("Adding masked mandatory "
                           "rate %02X\n",
                           network->rates_ex[i]);
                rates->supported_rates[rates->num_rates++] =
                    network->rates[i];
                continue;
            }

            IPW_DEBUG_SCAN("Rate %02X masked : 0x%08X\n",
                       network->rates_ex[i], priv->rates_mask);
            continue;
        }

        rates->supported_rates[rates->num_rates++] =
            network->rates_ex[i];
    }

    return 1;
}

static void ipw_copy_rates(struct ipw_supported_rates *dest,
                  const struct ipw_supported_rates *src)
{
    u8 i;
    for (i = 0; i < src->num_rates; i++)
        dest->supported_rates[i] = src->supported_rates[i];
    dest->num_rates = src->num_rates;
}

/* TODO: Look at sniffed packets in the air to determine if the basic rate
 * mask should ever be used -- right now all callers to add the scan rates are
 * set with the modulation = CCK, so BASIC_RATE_MASK is never set... */
static void ipw_add_cck_scan_rates(struct ipw_supported_rates *rates,
                   u8 modulation, u32 rate_mask)
{
    u8 basic_mask = (LIBIPW_OFDM_MODULATION == modulation) ?
        LIBIPW_BASIC_RATE_MASK : 0;

    if (rate_mask & LIBIPW_CCK_RATE_1MB_MASK)
        rates->supported_rates[rates->num_rates++] =
            LIBIPW_BASIC_RATE_MASK | LIBIPW_CCK_RATE_1MB;

    if (rate_mask & LIBIPW_CCK_RATE_2MB_MASK)
        rates->supported_rates[rates->num_rates++] =
            LIBIPW_BASIC_RATE_MASK | LIBIPW_CCK_RATE_2MB;

    if (rate_mask & LIBIPW_CCK_RATE_5MB_MASK)
        rates->supported_rates[rates->num_rates++] = basic_mask |
            LIBIPW_CCK_RATE_5MB;

    if (rate_mask & LIBIPW_CCK_RATE_11MB_MASK)
        rates->supported_rates[rates->num_rates++] = basic_mask |
            LIBIPW_CCK_RATE_11MB;
}

static void ipw_add_ofdm_scan_rates(struct ipw_supported_rates *rates,
                    u8 modulation, u32 rate_mask)
{
    u8 basic_mask = (LIBIPW_OFDM_MODULATION == modulation) ?
        LIBIPW_BASIC_RATE_MASK : 0;

    if (rate_mask & LIBIPW_OFDM_RATE_6MB_MASK)
        rates->supported_rates[rates->num_rates++] = basic_mask |
            LIBIPW_OFDM_RATE_6MB;

    if (rate_mask & LIBIPW_OFDM_RATE_9MB_MASK)
        rates->supported_rates[rates->num_rates++] =
            LIBIPW_OFDM_RATE_9MB;

    if (rate_mask & LIBIPW_OFDM_RATE_12MB_MASK)
        rates->supported_rates[rates->num_rates++] = basic_mask |
            LIBIPW_OFDM_RATE_12MB;

    if (rate_mask & LIBIPW_OFDM_RATE_18MB_MASK)
        rates->supported_rates[rates->num_rates++] =
            LIBIPW_OFDM_RATE_18MB;

    if (rate_mask & LIBIPW_OFDM_RATE_24MB_MASK)
        rates->supported_rates[rates->num_rates++] = basic_mask |
            LIBIPW_OFDM_RATE_24MB;

    if (rate_mask & LIBIPW_OFDM_RATE_36MB_MASK)
        rates->supported_rates[rates->num_rates++] =
            LIBIPW_OFDM_RATE_36MB;

    if (rate_mask & LIBIPW_OFDM_RATE_48MB_MASK)
        rates->supported_rates[rates->num_rates++] =
            LIBIPW_OFDM_RATE_48MB;

    if (rate_mask & LIBIPW_OFDM_RATE_54MB_MASK)
        rates->supported_rates[rates->num_rates++] =
            LIBIPW_OFDM_RATE_54MB;
}

struct ipw_network_match {
    struct libipw_network *network;
    struct ipw_supported_rates rates;
};

static int ipw_find_adhoc_network(struct ipw_priv *priv,
                  struct ipw_network_match *match,
                  struct libipw_network *network,
                  int roaming)
{
    struct ipw_supported_rates rates;
    DECLARE_SSID_BUF(ssid);

    /* Verify that this network's capability is compatible with the
     * current mode (AdHoc or Infrastructure) */
    if ((priv->ieee->iw_mode == IW_MODE_ADHOC &&
         !(network->capability & WLAN_CAPABILITY_IBSS))) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded due to "
                "capability mismatch.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    if (unlikely(roaming)) {
        /* If we are roaming, then ensure check if this is a valid
         * network to try and roam to */
        if ((network->ssid_len != match->network->ssid_len) ||
            memcmp(network->ssid, match->network->ssid,
               network->ssid_len)) {
            IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                    "because of non-network ESSID.\n",
                    print_ssid(ssid, network->ssid,
                           network->ssid_len),
                    network->bssid);
            return 0;
        }
    } else {
        /* If an ESSID has been configured then compare the broadcast
         * ESSID to ours */
        if ((priv->config & CFG_STATIC_ESSID) &&
            ((network->ssid_len != priv->essid_len) ||
             memcmp(network->ssid, priv->essid,
                min(network->ssid_len, priv->essid_len)))) {
            char escaped[IW_ESSID_MAX_SIZE * 2 + 1];

            strncpy(escaped,
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                sizeof(escaped));
            IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                    "because of ESSID mismatch: '%s'.\n",
                    escaped, network->bssid,
                    print_ssid(ssid, priv->essid,
                           priv->essid_len));
            return 0;
        }
    }

    /* If the old network rate is better than this one, don't bother
     * testing everything else. */

    if (network->time_stamp[0] < match->network->time_stamp[0]) {
        IPW_DEBUG_MERGE("Network '%s excluded because newer than "
                "current network.\n",
                print_ssid(ssid, match->network->ssid,
                       match->network->ssid_len));
        return 0;
    } else if (network->time_stamp[1] < match->network->time_stamp[1]) {
        IPW_DEBUG_MERGE("Network '%s excluded because newer than "
                "current network.\n",
                print_ssid(ssid, match->network->ssid,
                       match->network->ssid_len));
        return 0;
    }

    /* Now go through and see if the requested network is valid... */
    if (priv->ieee->scan_age != 0 &&
        time_after(jiffies, network->last_scanned + priv->ieee->scan_age)) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                "because of age: %ums.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid,
                jiffies_to_msecs(jiffies -
                         network->last_scanned));
        return 0;
    }

    if ((priv->config & CFG_STATIC_CHANNEL) &&
        (network->channel != priv->channel)) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                "because of channel mismatch: %d != %d.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid,
                network->channel, priv->channel);
        return 0;
    }

    /* Verify privacy compatibility */
    if (((priv->capability & CAP_PRIVACY_ON) ? 1 : 0) !=
        ((network->capability & WLAN_CAPABILITY_PRIVACY) ? 1 : 0)) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                "because of privacy mismatch: %s != %s.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid,
                priv->
                capability & CAP_PRIVACY_ON ? "on" : "off",
                network->
                capability & WLAN_CAPABILITY_PRIVACY ? "on" :
                "off");
        return 0;
    }

    if (!memcmp(network->bssid, priv->bssid, ETH_ALEN)) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                "because of the same BSSID match: %pM"
                ".\n", print_ssid(ssid, network->ssid,
                          network->ssid_len),
                network->bssid,
                priv->bssid);
        return 0;
    }

    /* Filter out any incompatible freq / mode combinations */
    if (!libipw_is_valid_mode(priv->ieee, network->mode)) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                "because of invalid frequency/mode "
                "combination.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    /* Ensure that the rates supported by the driver are compatible with
     * this AP, including verification of basic rates (mandatory) */
    if (!ipw_compatible_rates(priv, network, &rates)) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                "because configured rate mask excludes "
                "AP mandatory rate.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    if (rates.num_rates == 0) {
        IPW_DEBUG_MERGE("Network '%s (%pM)' excluded "
                "because of no compatible rates.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    /* TODO: Perform any further minimal comparititive tests.  We do not
     * want to put too much policy logic here; intelligent scan selection
     * should occur within a generic IEEE 802.11 user space tool.  */

    /* Set up 'new' AP to this network */
    ipw_copy_rates(&match->rates, &rates);
    match->network = network;
    IPW_DEBUG_MERGE("Network '%s (%pM)' is a viable match.\n",
            print_ssid(ssid, network->ssid, network->ssid_len),
            network->bssid);

    return 1;
}

static void ipw_merge_adhoc_network(struct work_struct *work)
{
    DECLARE_SSID_BUF(ssid);
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, merge_networks);
    struct libipw_network *network = NULL;
    struct ipw_network_match match = {
        .network = priv->assoc_network
    };

    if ((priv->status & STATUS_ASSOCIATED) &&
        (priv->ieee->iw_mode == IW_MODE_ADHOC)) {
        /* First pass through ROAM process -- look for a better
         * network */
        unsigned long flags;

        spin_lock_irqsave(&priv->ieee->lock, flags);
        list_for_each_entry(network, &priv->ieee->network_list, list) {
            if (network != priv->assoc_network)
                ipw_find_adhoc_network(priv, &match, network,
                               1);
        }
        spin_unlock_irqrestore(&priv->ieee->lock, flags);

        if (match.network == priv->assoc_network) {
            IPW_DEBUG_MERGE("No better ADHOC in this network to "
                    "merge to.\n");
            return;
        }

        mutex_lock(&priv->mutex);
        if ((priv->ieee->iw_mode == IW_MODE_ADHOC)) {
            IPW_DEBUG_MERGE("remove network %s\n",
                    print_ssid(ssid, priv->essid,
                           priv->essid_len));
            ipw_remove_current_network(priv);
        }

        ipw_disassociate(priv);
        priv->assoc_network = match.network;
        mutex_unlock(&priv->mutex);
        return;
    }
}

static int ipw_best_network(struct ipw_priv *priv,
                struct ipw_network_match *match,
                struct libipw_network *network, int roaming)
{
    struct ipw_supported_rates rates;
    DECLARE_SSID_BUF(ssid);

    /* Verify that this network's capability is compatible with the
     * current mode (AdHoc or Infrastructure) */
    if ((priv->ieee->iw_mode == IW_MODE_INFRA &&
         !(network->capability & WLAN_CAPABILITY_ESS)) ||
        (priv->ieee->iw_mode == IW_MODE_ADHOC &&
         !(network->capability & WLAN_CAPABILITY_IBSS))) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded due to "
                "capability mismatch.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    if (unlikely(roaming)) {
        /* If we are roaming, then ensure check if this is a valid
         * network to try and roam to */
        if ((network->ssid_len != match->network->ssid_len) ||
            memcmp(network->ssid, match->network->ssid,
               network->ssid_len)) {
            IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                    "because of non-network ESSID.\n",
                    print_ssid(ssid, network->ssid,
                           network->ssid_len),
                    network->bssid);
            return 0;
        }
    } else {
        /* If an ESSID has been configured then compare the broadcast
         * ESSID to ours */
        if ((priv->config & CFG_STATIC_ESSID) &&
            ((network->ssid_len != priv->essid_len) ||
             memcmp(network->ssid, priv->essid,
                min(network->ssid_len, priv->essid_len)))) {
            char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
            strncpy(escaped,
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                sizeof(escaped));
            IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                    "because of ESSID mismatch: '%s'.\n",
                    escaped, network->bssid,
                    print_ssid(ssid, priv->essid,
                           priv->essid_len));
            return 0;
        }
    }

    /* If the old network rate is better than this one, don't bother
     * testing everything else. */
    if (match->network && match->network->stats.rssi > network->stats.rssi) {
        char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
        strncpy(escaped,
            print_ssid(ssid, network->ssid, network->ssid_len),
            sizeof(escaped));
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded because "
                "'%s (%pM)' has a stronger signal.\n",
                escaped, network->bssid,
                print_ssid(ssid, match->network->ssid,
                       match->network->ssid_len),
                match->network->bssid);
        return 0;
    }

    /* If this network has already had an association attempt within the
     * last 3 seconds, do not try and associate again... */
    if (network->last_associate &&
        time_after(network->last_associate + (HZ * 3UL), jiffies)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of storming (%ums since last "
                "assoc attempt).\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid,
                jiffies_to_msecs(jiffies -
                         network->last_associate));
        return 0;
    }

    /* Now go through and see if the requested network is valid... */
    if (priv->ieee->scan_age != 0 &&
        time_after(jiffies, network->last_scanned + priv->ieee->scan_age)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of age: %ums.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid,
                jiffies_to_msecs(jiffies -
                         network->last_scanned));
        return 0;
    }

    if ((priv->config & CFG_STATIC_CHANNEL) &&
        (network->channel != priv->channel)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of channel mismatch: %d != %d.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid,
                network->channel, priv->channel);
        return 0;
    }

    /* Verify privacy compatibility */
    if (((priv->capability & CAP_PRIVACY_ON) ? 1 : 0) !=
        ((network->capability & WLAN_CAPABILITY_PRIVACY) ? 1 : 0)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of privacy mismatch: %s != %s.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid,
                priv->capability & CAP_PRIVACY_ON ? "on" :
                "off",
                network->capability &
                WLAN_CAPABILITY_PRIVACY ? "on" : "off");
        return 0;
    }

    if ((priv->config & CFG_STATIC_BSSID) &&
        memcmp(network->bssid, priv->bssid, ETH_ALEN)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of BSSID mismatch: %pM.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid, priv->bssid);
        return 0;
    }

    /* Filter out any incompatible freq / mode combinations */
    if (!libipw_is_valid_mode(priv->ieee, network->mode)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of invalid frequency/mode "
                "combination.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    /* Filter out invalid channel in current GEO */
    if (!libipw_is_valid_channel(priv->ieee, network->channel)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of invalid channel in current GEO\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    /* Ensure that the rates supported by the driver are compatible with
     * this AP, including verification of basic rates (mandatory) */
    if (!ipw_compatible_rates(priv, network, &rates)) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because configured rate mask excludes "
                "AP mandatory rate.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    if (rates.num_rates == 0) {
        IPW_DEBUG_ASSOC("Network '%s (%pM)' excluded "
                "because of no compatible rates.\n",
                print_ssid(ssid, network->ssid,
                       network->ssid_len),
                network->bssid);
        return 0;
    }

    /* TODO: Perform any further minimal comparititive tests.  We do not
     * want to put too much policy logic here; intelligent scan selection
     * should occur within a generic IEEE 802.11 user space tool.  */

    /* Set up 'new' AP to this network */
    ipw_copy_rates(&match->rates, &rates);
    match->network = network;

    IPW_DEBUG_ASSOC("Network '%s (%pM)' is a viable match.\n",
            print_ssid(ssid, network->ssid, network->ssid_len),
            network->bssid);

    return 1;
}

static void ipw_adhoc_create(struct ipw_priv *priv,
                 struct libipw_network *network)
{
    const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
    int i;

    /*
     * For the purposes of scanning, we can set our wireless mode
     * to trigger scans across combinations of bands, but when it
     * comes to creating a new ad-hoc network, we have tell the FW
     * exactly which band to use.
     *
     * We also have the possibility of an invalid channel for the
     * chossen band.  Attempting to create a new ad-hoc network
     * with an invalid channel for wireless mode will trigger a
     * FW fatal error.
     *
     */
    switch (libipw_is_valid_channel(priv->ieee, priv->channel)) {
    case LIBIPW_52GHZ_BAND:
        network->mode = IEEE_A;
        i = libipw_channel_to_index(priv->ieee, priv->channel);
        BUG_ON(i == -1);
        if (geo->a[i].flags & LIBIPW_CH_PASSIVE_ONLY) {
            IPW_WARNING("Overriding invalid channel\n");
            priv->channel = geo->a[0].channel;
        }
        break;

    case LIBIPW_24GHZ_BAND:
        if (priv->ieee->mode & IEEE_G)
            network->mode = IEEE_G;
        else
            network->mode = IEEE_B;
        i = libipw_channel_to_index(priv->ieee, priv->channel);
        BUG_ON(i == -1);
        if (geo->bg[i].flags & LIBIPW_CH_PASSIVE_ONLY) {
            IPW_WARNING("Overriding invalid channel\n");
            priv->channel = geo->bg[0].channel;
        }
        break;

    default:
        IPW_WARNING("Overriding invalid channel\n");
        if (priv->ieee->mode & IEEE_A) {
            network->mode = IEEE_A;
            priv->channel = geo->a[0].channel;
        } else if (priv->ieee->mode & IEEE_G) {
            network->mode = IEEE_G;
            priv->channel = geo->bg[0].channel;
        } else {
            network->mode = IEEE_B;
            priv->channel = geo->bg[0].channel;
        }
        break;
    }

    network->channel = priv->channel;
    priv->config |= CFG_ADHOC_PERSIST;
    ipw_create_bssid(priv, network->bssid);
    network->ssid_len = priv->essid_len;
    memcpy(network->ssid, priv->essid, priv->essid_len);
    memset(&network->stats, 0, sizeof(network->stats));
    network->capability = WLAN_CAPABILITY_IBSS;
    if (!(priv->config & CFG_PREAMBLE_LONG))
        network->capability |= WLAN_CAPABILITY_SHORT_PREAMBLE;
    if (priv->capability & CAP_PRIVACY_ON)
        network->capability |= WLAN_CAPABILITY_PRIVACY;
    network->rates_len = min(priv->rates.num_rates, MAX_RATES_LENGTH);
    memcpy(network->rates, priv->rates.supported_rates, network->rates_len);
    network->rates_ex_len = priv->rates.num_rates - network->rates_len;
    memcpy(network->rates_ex,
           &priv->rates.supported_rates[network->rates_len],
           network->rates_ex_len);
    network->last_scanned = 0;
    network->flags = 0;
    network->last_associate = 0;
    network->time_stamp[0] = 0;
    network->time_stamp[1] = 0;
    network->beacon_interval = 100; /* Default */
    network->listen_interval = 10;  /* Default */
    network->atim_window = 0;   /* Default */
    network->wpa_ie_len = 0;
    network->rsn_ie_len = 0;
}

static void ipw_send_tgi_tx_key(struct ipw_priv *priv, int type, int index)
{
    struct ipw_tgi_tx_key key;

    if (!(priv->ieee->sec.flags & (1 << index)))
        return;

    key.key_id = index;
    memcpy(key.key, priv->ieee->sec.keys[index], SCM_TEMPORAL_KEY_LENGTH);
    key.security_type = type;
    key.station_index = 0;  /* always 0 for BSS */
    key.flags = 0;
    /* 0 for new key; previous value of counter (after fatal error) */
    key.tx_counter[0] = cpu_to_le32(0);
    key.tx_counter[1] = cpu_to_le32(0);

    ipw_send_cmd_pdu(priv, IPW_CMD_TGI_TX_KEY, sizeof(key), &key);
}

static void ipw_send_wep_keys(struct ipw_priv *priv, int type)
{
    struct ipw_wep_key key;
    int i;

    key.cmd_id = DINO_CMD_WEP_KEY;
    key.seq_num = 0;

    /* Note: AES keys cannot be set for multiple times.
     * Only set it at the first time. */
    for (i = 0; i < 4; i++) {
        key.key_index = i | type;
        if (!(priv->ieee->sec.flags & (1 << i))) {
            key.key_size = 0;
            continue;
        }

        key.key_size = priv->ieee->sec.key_sizes[i];
        memcpy(key.key, priv->ieee->sec.keys[i], key.key_size);

        ipw_send_cmd_pdu(priv, IPW_CMD_WEP_KEY, sizeof(key), &key);
    }
}

static void ipw_set_hw_decrypt_unicast(struct ipw_priv *priv, int level)
{
    if (priv->ieee->host_encrypt)
        return;

    switch (level) {
    case SEC_LEVEL_3:
        priv->sys_config.disable_unicast_decryption = 0;
        priv->ieee->host_decrypt = 0;
        break;
    case SEC_LEVEL_2:
        priv->sys_config.disable_unicast_decryption = 1;
        priv->ieee->host_decrypt = 1;
        break;
    case SEC_LEVEL_1:
        priv->sys_config.disable_unicast_decryption = 0;
        priv->ieee->host_decrypt = 0;
        break;
    case SEC_LEVEL_0:
        priv->sys_config.disable_unicast_decryption = 1;
        break;
    default:
        break;
    }
}

static void ipw_set_hw_decrypt_multicast(struct ipw_priv *priv, int level)
{
    if (priv->ieee->host_encrypt)
        return;

    switch (level) {
    case SEC_LEVEL_3:
        priv->sys_config.disable_multicast_decryption = 0;
        break;
    case SEC_LEVEL_2:
        priv->sys_config.disable_multicast_decryption = 1;
        break;
    case SEC_LEVEL_1:
        priv->sys_config.disable_multicast_decryption = 0;
        break;
    case SEC_LEVEL_0:
        priv->sys_config.disable_multicast_decryption = 1;
        break;
    default:
        break;
    }
}

static void ipw_set_hwcrypto_keys(struct ipw_priv *priv)
{
    switch (priv->ieee->sec.level) {
    case SEC_LEVEL_3:
        if (priv->ieee->sec.flags & SEC_ACTIVE_KEY)
            ipw_send_tgi_tx_key(priv,
                        DCT_FLAG_EXT_SECURITY_CCM,
                        priv->ieee->sec.active_key);

        if (!priv->ieee->host_mc_decrypt)
            ipw_send_wep_keys(priv, DCW_WEP_KEY_SEC_TYPE_CCM);
        break;
    case SEC_LEVEL_2:
        if (priv->ieee->sec.flags & SEC_ACTIVE_KEY)
            ipw_send_tgi_tx_key(priv,
                        DCT_FLAG_EXT_SECURITY_TKIP,
                        priv->ieee->sec.active_key);
        break;
    case SEC_LEVEL_1:
        ipw_send_wep_keys(priv, DCW_WEP_KEY_SEC_TYPE_WEP);
        ipw_set_hw_decrypt_unicast(priv, priv->ieee->sec.level);
        ipw_set_hw_decrypt_multicast(priv, priv->ieee->sec.level);
        break;
    case SEC_LEVEL_0:
    default:
        break;
    }
}

static void ipw_adhoc_check(void *data)
{
    struct ipw_priv *priv = data;

    if (priv->missed_adhoc_beacons++ > priv->disassociate_threshold &&
        !(priv->config & CFG_ADHOC_PERSIST)) {
        IPW_DEBUG(IPW_DL_INFO | IPW_DL_NOTIF |
              IPW_DL_STATE | IPW_DL_ASSOC,
              "Missed beacon: %d - disassociate\n",
              priv->missed_adhoc_beacons);
        ipw_remove_current_network(priv);
        ipw_disassociate(priv);
        return;
    }

    schedule_delayed_work(&priv->adhoc_check,
                  le16_to_cpu(priv->assoc_request.beacon_interval));
}

static void ipw_bg_adhoc_check(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, adhoc_check.work);
    mutex_lock(&priv->mutex);
    ipw_adhoc_check(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_debug_config(struct ipw_priv *priv)
{
    DECLARE_SSID_BUF(ssid);
    IPW_DEBUG_INFO("Scan completed, no valid APs matched "
               "[CFG 0x%08X]\n", priv->config);
    if (priv->config & CFG_STATIC_CHANNEL)
        IPW_DEBUG_INFO("Channel locked to %d\n", priv->channel);
    else
        IPW_DEBUG_INFO("Channel unlocked.\n");
    if (priv->config & CFG_STATIC_ESSID)
        IPW_DEBUG_INFO("ESSID locked to '%s'\n",
                   print_ssid(ssid, priv->essid, priv->essid_len));
    else
        IPW_DEBUG_INFO("ESSID unlocked.\n");
    if (priv->config & CFG_STATIC_BSSID)
        IPW_DEBUG_INFO("BSSID locked to %pM\n", priv->bssid);
    else
        IPW_DEBUG_INFO("BSSID unlocked.\n");
    if (priv->capability & CAP_PRIVACY_ON)
        IPW_DEBUG_INFO("PRIVACY on\n");
    else
        IPW_DEBUG_INFO("PRIVACY off\n");
    IPW_DEBUG_INFO("RATE MASK: 0x%08X\n", priv->rates_mask);
}

static void ipw_set_fixed_rate(struct ipw_priv *priv, int mode)
{
    /* TODO: Verify that this works... */
    struct ipw_fixed_rate fr;
    u32 reg;
    u16 mask = 0;
    u16 new_tx_rates = priv->rates_mask;

    /* Identify 'current FW band' and match it with the fixed
     * Tx rates */

    switch (priv->ieee->freq_band) {
    case LIBIPW_52GHZ_BAND: /* A only */
        /* IEEE_A */
        if (priv->rates_mask & ~LIBIPW_OFDM_RATES_MASK) {
            /* Invalid fixed rate mask */
            IPW_DEBUG_WX
                ("invalid fixed rate mask in ipw_set_fixed_rate\n");
            new_tx_rates = 0;
            break;
        }

        new_tx_rates >>= LIBIPW_OFDM_SHIFT_MASK_A;
        break;

    default:        /* 2.4Ghz or Mixed */
        /* IEEE_B */
        if (mode == IEEE_B) {
            if (new_tx_rates & ~LIBIPW_CCK_RATES_MASK) {
                /* Invalid fixed rate mask */
                IPW_DEBUG_WX
                    ("invalid fixed rate mask in ipw_set_fixed_rate\n");
                new_tx_rates = 0;
            }
            break;
        }

        /* IEEE_G */
        if (new_tx_rates & ~(LIBIPW_CCK_RATES_MASK |
                    LIBIPW_OFDM_RATES_MASK)) {
            /* Invalid fixed rate mask */
            IPW_DEBUG_WX
                ("invalid fixed rate mask in ipw_set_fixed_rate\n");
            new_tx_rates = 0;
            break;
        }

        if (LIBIPW_OFDM_RATE_6MB_MASK & new_tx_rates) {
            mask |= (LIBIPW_OFDM_RATE_6MB_MASK >> 1);
            new_tx_rates &= ~LIBIPW_OFDM_RATE_6MB_MASK;
        }

        if (LIBIPW_OFDM_RATE_9MB_MASK & new_tx_rates) {
            mask |= (LIBIPW_OFDM_RATE_9MB_MASK >> 1);
            new_tx_rates &= ~LIBIPW_OFDM_RATE_9MB_MASK;
        }

        if (LIBIPW_OFDM_RATE_12MB_MASK & new_tx_rates) {
            mask |= (LIBIPW_OFDM_RATE_12MB_MASK >> 1);
            new_tx_rates &= ~LIBIPW_OFDM_RATE_12MB_MASK;
        }

        new_tx_rates |= mask;
        break;
    }

    fr.tx_rates = cpu_to_le16(new_tx_rates);

    reg = ipw_read32(priv, IPW_MEM_FIXED_OVERRIDE);
    ipw_write_reg32(priv, reg, *(u32 *) & fr);
}

static void ipw_abort_scan(struct ipw_priv *priv)
{
    int err;

    if (priv->status & STATUS_SCAN_ABORTING) {
        IPW_DEBUG_HC("Ignoring concurrent scan abort request.\n");
        return;
    }
    priv->status |= STATUS_SCAN_ABORTING;

    err = ipw_send_scan_abort(priv);
    if (err)
        IPW_DEBUG_HC("Request to abort scan failed.\n");
}

static void ipw_add_scan_channels(struct ipw_priv *priv,
                  struct ipw_scan_request_ext *scan,
                  int scan_type)
{
    int channel_index = 0;
    const struct libipw_geo *geo;
    int i;

    geo = libipw_get_geo(priv->ieee);

    if (priv->ieee->freq_band & LIBIPW_52GHZ_BAND) {
        int start = channel_index;
        for (i = 0; i < geo->a_channels; i++) {
            if ((priv->status & STATUS_ASSOCIATED) &&
                geo->a[i].channel == priv->channel)
                continue;
            channel_index++;
            scan->channels_list[channel_index] = geo->a[i].channel;
            ipw_set_scan_type(scan, channel_index,
                      geo->a[i].
                      flags & LIBIPW_CH_PASSIVE_ONLY ?
                      IPW_SCAN_PASSIVE_FULL_DWELL_SCAN :
                      scan_type);
        }

        if (start != channel_index) {
            scan->channels_list[start] = (u8) (IPW_A_MODE << 6) |
                (channel_index - start);
            channel_index++;
        }
    }

    if (priv->ieee->freq_band & LIBIPW_24GHZ_BAND) {
        int start = channel_index;
        if (priv->config & CFG_SPEED_SCAN) {
            int index;
            u8 channels[LIBIPW_24GHZ_CHANNELS] = {
                /* nop out the list */
                [0] = 0
            };

            u8 channel;
            while (channel_index < IPW_SCAN_CHANNELS - 1) {
                channel =
                    priv->speed_scan[priv->speed_scan_pos];
                if (channel == 0) {
                    priv->speed_scan_pos = 0;
                    channel = priv->speed_scan[0];
                }
                if ((priv->status & STATUS_ASSOCIATED) &&
                    channel == priv->channel) {
                    priv->speed_scan_pos++;
                    continue;
                }

                /* If this channel has already been
                 * added in scan, break from loop
                 * and this will be the first channel
                 * in the next scan.
                 */
                if (channels[channel - 1] != 0)
                    break;

                channels[channel - 1] = 1;
                priv->speed_scan_pos++;
                channel_index++;
                scan->channels_list[channel_index] = channel;
                index =
                    libipw_channel_to_index(priv->ieee, channel);
                ipw_set_scan_type(scan, channel_index,
                          geo->bg[index].
                          flags &
                          LIBIPW_CH_PASSIVE_ONLY ?
                          IPW_SCAN_PASSIVE_FULL_DWELL_SCAN
                          : scan_type);
            }
        } else {
            for (i = 0; i < geo->bg_channels; i++) {
                if ((priv->status & STATUS_ASSOCIATED) &&
                    geo->bg[i].channel == priv->channel)
                    continue;
                channel_index++;
                scan->channels_list[channel_index] =
                    geo->bg[i].channel;
                ipw_set_scan_type(scan, channel_index,
                          geo->bg[i].
                          flags &
                          LIBIPW_CH_PASSIVE_ONLY ?
                          IPW_SCAN_PASSIVE_FULL_DWELL_SCAN
                          : scan_type);
            }
        }

        if (start != channel_index) {
            scan->channels_list[start] = (u8) (IPW_B_MODE << 6) |
                (channel_index - start);
        }
    }
}

static int ipw_passive_dwell_time(struct ipw_priv *priv)
{
    /* staying on passive channels longer than the DTIM interval during a
     * scan, while associated, causes the firmware to cancel the scan
     * without notification. Hence, don't stay on passive channels longer
     * than the beacon interval.
     */
    if (priv->status & STATUS_ASSOCIATED
        && priv->assoc_network->beacon_interval > 10)
        return priv->assoc_network->beacon_interval - 10;
    else
        return 120;
}

static int ipw_request_scan_helper(struct ipw_priv *priv, int type, int direct)
{
    struct ipw_scan_request_ext scan;
    int err = 0, scan_type;

    if (!(priv->status & STATUS_INIT) ||
        (priv->status & STATUS_EXIT_PENDING))
        return 0;

    mutex_lock(&priv->mutex);

    if (direct && (priv->direct_scan_ssid_len == 0)) {
        IPW_DEBUG_HC("Direct scan requested but no SSID to scan for\n");
        priv->status &= ~STATUS_DIRECT_SCAN_PENDING;
        goto done;
    }

    if (priv->status & STATUS_SCANNING) {
        IPW_DEBUG_HC("Concurrent scan requested.  Queuing.\n");
        priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING :
                    STATUS_SCAN_PENDING;
        goto done;
    }

    if (!(priv->status & STATUS_SCAN_FORCED) &&
        priv->status & STATUS_SCAN_ABORTING) {
        IPW_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
        priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING :
                    STATUS_SCAN_PENDING;
        goto done;
    }

    if (priv->status & STATUS_RF_KILL_MASK) {
        IPW_DEBUG_HC("Queuing scan due to RF Kill activation\n");
        priv->status |= direct ? STATUS_DIRECT_SCAN_PENDING :
                    STATUS_SCAN_PENDING;
        goto done;
    }

    memset(&scan, 0, sizeof(scan));
    scan.full_scan_index = cpu_to_le32(libipw_get_scans(priv->ieee));

    if (type == IW_SCAN_TYPE_PASSIVE) {
        IPW_DEBUG_WX("use passive scanning\n");
        scan_type = IPW_SCAN_PASSIVE_FULL_DWELL_SCAN;
        scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] =
            cpu_to_le16(ipw_passive_dwell_time(priv));
        ipw_add_scan_channels(priv, &scan, scan_type);
        goto send_request;
    }

    /* Use active scan by default. */
    if (priv->config & CFG_SPEED_SCAN)
        scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_SCAN] =
            cpu_to_le16(30);
    else
        scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_SCAN] =
            cpu_to_le16(20);

    scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN] =
        cpu_to_le16(20);

    scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] =
        cpu_to_le16(ipw_passive_dwell_time(priv));
    scan.dwell_time[IPW_SCAN_ACTIVE_DIRECT_SCAN] = cpu_to_le16(20);

#ifdef CONFIG_IPW2200_MONITOR
    if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
        u8 channel;
        u8 band = 0;

        switch (libipw_is_valid_channel(priv->ieee, priv->channel)) {
        case LIBIPW_52GHZ_BAND:
            band = (u8) (IPW_A_MODE << 6) | 1;
            channel = priv->channel;
            break;

        case LIBIPW_24GHZ_BAND:
            band = (u8) (IPW_B_MODE << 6) | 1;
            channel = priv->channel;
            break;

        default:
            band = (u8) (IPW_B_MODE << 6) | 1;
            channel = 9;
            break;
        }

        scan.channels_list[0] = band;
        scan.channels_list[1] = channel;
        ipw_set_scan_type(&scan, 1, IPW_SCAN_PASSIVE_FULL_DWELL_SCAN);

        /* NOTE:  The card will sit on this channel for this time
         * period.  Scan aborts are timing sensitive and frequently
         * result in firmware restarts.  As such, it is best to
         * set a small dwell_time here and just keep re-issuing
         * scans.  Otherwise fast channel hopping will not actually
         * hop channels.
         *
         * TODO: Move SPEED SCAN support to all modes and bands */
        scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] =
            cpu_to_le16(2000);
    } else {
#endif              /* CONFIG_IPW2200_MONITOR */
        /* Honor direct scans first, otherwise if we are roaming make
         * this a direct scan for the current network.  Finally,
         * ensure that every other scan is a fast channel hop scan */
        if (direct) {
            err = ipw_send_ssid(priv, priv->direct_scan_ssid,
                                priv->direct_scan_ssid_len);
            if (err) {
                IPW_DEBUG_HC("Attempt to send SSID command  "
                         "failed\n");
                goto done;
            }

            scan_type = IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN;
        } else if ((priv->status & STATUS_ROAMING)
               || (!(priv->status & STATUS_ASSOCIATED)
                   && (priv->config & CFG_STATIC_ESSID)
                   && (le32_to_cpu(scan.full_scan_index) % 2))) {
            err = ipw_send_ssid(priv, priv->essid, priv->essid_len);
            if (err) {
                IPW_DEBUG_HC("Attempt to send SSID command "
                         "failed.\n");
                goto done;
            }

            scan_type = IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN;
        } else
            scan_type = IPW_SCAN_ACTIVE_BROADCAST_SCAN;

        ipw_add_scan_channels(priv, &scan, scan_type);
#ifdef CONFIG_IPW2200_MONITOR
    }
#endif

send_request:
    err = ipw_send_scan_request_ext(priv, &scan);
    if (err) {
        IPW_DEBUG_HC("Sending scan command failed: %08X\n", err);
        goto done;
    }

    priv->status |= STATUS_SCANNING;
    if (direct) {
        priv->status &= ~STATUS_DIRECT_SCAN_PENDING;
        priv->direct_scan_ssid_len = 0;
    } else
        priv->status &= ~STATUS_SCAN_PENDING;

    schedule_delayed_work(&priv->scan_check, IPW_SCAN_CHECK_WATCHDOG);
done:
    mutex_unlock(&priv->mutex);
    return err;
}

static void ipw_request_passive_scan(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, request_passive_scan.work);
    ipw_request_scan_helper(priv, IW_SCAN_TYPE_PASSIVE, 0);
}

static void ipw_request_scan(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, request_scan.work);
    ipw_request_scan_helper(priv, IW_SCAN_TYPE_ACTIVE, 0);
}

static void ipw_request_direct_scan(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, request_direct_scan.work);
    ipw_request_scan_helper(priv, IW_SCAN_TYPE_ACTIVE, 1);
}

static void ipw_bg_abort_scan(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, abort_scan);
    mutex_lock(&priv->mutex);
    ipw_abort_scan(priv);
    mutex_unlock(&priv->mutex);
}

static int ipw_wpa_enable(struct ipw_priv *priv, int value)
{
    /* This is called when wpa_supplicant loads and closes the driver
     * interface. */
    priv->ieee->wpa_enabled = value;
    return 0;
}

static int ipw_wpa_set_auth_algs(struct ipw_priv *priv, int value)
{
    struct libipw_device *ieee = priv->ieee;
    struct libipw_security sec = {
        .flags = SEC_AUTH_MODE,
    };
    int ret = 0;

    if (value & IW_AUTH_ALG_SHARED_KEY) {
        sec.auth_mode = WLAN_AUTH_SHARED_KEY;
        ieee->open_wep = 0;
    } else if (value & IW_AUTH_ALG_OPEN_SYSTEM) {
        sec.auth_mode = WLAN_AUTH_OPEN;
        ieee->open_wep = 1;
    } else if (value & IW_AUTH_ALG_LEAP) {
        sec.auth_mode = WLAN_AUTH_LEAP;
        ieee->open_wep = 1;
    } else
        return -EINVAL;

    if (ieee->set_security)
        ieee->set_security(ieee->dev, &sec);
    else
        ret = -EOPNOTSUPP;

    return ret;
}

static void ipw_wpa_assoc_frame(struct ipw_priv *priv, char *wpa_ie,
                int wpa_ie_len)
{
    /* make sure WPA is enabled */
    ipw_wpa_enable(priv, 1);
}

static int ipw_set_rsn_capa(struct ipw_priv *priv,
                char *capabilities, int length)
{
    IPW_DEBUG_HC("HOST_CMD_RSN_CAPABILITIES\n");

    return ipw_send_cmd_pdu(priv, IPW_CMD_RSN_CAPABILITIES, length,
                capabilities);
}

/*
 * WE-18 support
 */

/* SIOCSIWGENIE */
static int ipw_wx_set_genie(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct libipw_device *ieee = priv->ieee;
    u8 *buf;
    int err = 0;

    if (wrqu->data.length > MAX_WPA_IE_LEN ||
        (wrqu->data.length && extra == NULL))
        return -EINVAL;

    if (wrqu->data.length) {
        buf = kmemdup(extra, wrqu->data.length, GFP_KERNEL);
        if (buf == NULL) {
            err = -ENOMEM;
            goto out;
        }

        kfree(ieee->wpa_ie);
        ieee->wpa_ie = buf;
        ieee->wpa_ie_len = wrqu->data.length;
    } else {
        kfree(ieee->wpa_ie);
        ieee->wpa_ie = NULL;
        ieee->wpa_ie_len = 0;
    }

    ipw_wpa_assoc_frame(priv, ieee->wpa_ie, ieee->wpa_ie_len);
      out:
    return err;
}

/* SIOCGIWGENIE */
static int ipw_wx_get_genie(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct libipw_device *ieee = priv->ieee;
    int err = 0;

    if (ieee->wpa_ie_len == 0 || ieee->wpa_ie == NULL) {
        wrqu->data.length = 0;
        goto out;
    }

    if (wrqu->data.length < ieee->wpa_ie_len) {
        err = -E2BIG;
        goto out;
    }

    wrqu->data.length = ieee->wpa_ie_len;
    memcpy(extra, ieee->wpa_ie, ieee->wpa_ie_len);

      out:
    return err;
}

static int wext_cipher2level(int cipher)
{
    switch (cipher) {
    case IW_AUTH_CIPHER_NONE:
        return SEC_LEVEL_0;
    case IW_AUTH_CIPHER_WEP40:
    case IW_AUTH_CIPHER_WEP104:
        return SEC_LEVEL_1;
    case IW_AUTH_CIPHER_TKIP:
        return SEC_LEVEL_2;
    case IW_AUTH_CIPHER_CCMP:
        return SEC_LEVEL_3;
    default:
        return -1;
    }
}

/* SIOCSIWAUTH */
static int ipw_wx_set_auth(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct libipw_device *ieee = priv->ieee;
    struct iw_param *param = &wrqu->param;
    struct lib80211_crypt_data *crypt;
    unsigned long flags;
    int ret = 0;

    switch (param->flags & IW_AUTH_INDEX) {
    case IW_AUTH_WPA_VERSION:
        break;
    case IW_AUTH_CIPHER_PAIRWISE:
        ipw_set_hw_decrypt_unicast(priv,
                       wext_cipher2level(param->value));
        break;
    case IW_AUTH_CIPHER_GROUP:
        ipw_set_hw_decrypt_multicast(priv,
                         wext_cipher2level(param->value));
        break;
    case IW_AUTH_KEY_MGMT:
        /*
         * ipw2200 does not use these parameters
         */
        break;

    case IW_AUTH_TKIP_COUNTERMEASURES:
        crypt = priv->ieee->crypt_info.crypt[priv->ieee->crypt_info.tx_keyidx];
        if (!crypt || !crypt->ops->set_flags || !crypt->ops->get_flags)
            break;

        flags = crypt->ops->get_flags(crypt->priv);

        if (param->value)
            flags |= IEEE80211_CRYPTO_TKIP_COUNTERMEASURES;
        else
            flags &= ~IEEE80211_CRYPTO_TKIP_COUNTERMEASURES;

        crypt->ops->set_flags(flags, crypt->priv);

        break;

    case IW_AUTH_DROP_UNENCRYPTED:{
            /* HACK:
             *
             * wpa_supplicant calls set_wpa_enabled when the driver
             * is loaded and unloaded, regardless of if WPA is being
             * used.  No other calls are made which can be used to
             * determine if encryption will be used or not prior to
             * association being expected.  If encryption is not being
             * used, drop_unencrypted is set to false, else true -- we
             * can use this to determine if the CAP_PRIVACY_ON bit should
             * be set.
             */
            struct libipw_security sec = {
                .flags = SEC_ENABLED,
                .enabled = param->value,
            };
            priv->ieee->drop_unencrypted = param->value;
            /* We only change SEC_LEVEL for open mode. Others
             * are set by ipw_wpa_set_encryption.
             */
            if (!param->value) {
                sec.flags |= SEC_LEVEL;
                sec.level = SEC_LEVEL_0;
            } else {
                sec.flags |= SEC_LEVEL;
                sec.level = SEC_LEVEL_1;
            }
            if (priv->ieee->set_security)
                priv->ieee->set_security(priv->ieee->dev, &sec);
            break;
        }

    case IW_AUTH_80211_AUTH_ALG:
        ret = ipw_wpa_set_auth_algs(priv, param->value);
        break;

    case IW_AUTH_WPA_ENABLED:
        ret = ipw_wpa_enable(priv, param->value);
        ipw_disassociate(priv);
        break;

    case IW_AUTH_RX_UNENCRYPTED_EAPOL:
        ieee->ieee802_1x = param->value;
        break;

    case IW_AUTH_PRIVACY_INVOKED:
        ieee->privacy_invoked = param->value;
        break;

    default:
        return -EOPNOTSUPP;
    }
    return ret;
}

/* SIOCGIWAUTH */
static int ipw_wx_get_auth(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct libipw_device *ieee = priv->ieee;
    struct lib80211_crypt_data *crypt;
    struct iw_param *param = &wrqu->param;
    int ret = 0;

    switch (param->flags & IW_AUTH_INDEX) {
    case IW_AUTH_WPA_VERSION:
    case IW_AUTH_CIPHER_PAIRWISE:
    case IW_AUTH_CIPHER_GROUP:
    case IW_AUTH_KEY_MGMT:
        /*
         * wpa_supplicant will control these internally
         */
        ret = -EOPNOTSUPP;
        break;

    case IW_AUTH_TKIP_COUNTERMEASURES:
        crypt = priv->ieee->crypt_info.crypt[priv->ieee->crypt_info.tx_keyidx];
        if (!crypt || !crypt->ops->get_flags)
            break;

        param->value = (crypt->ops->get_flags(crypt->priv) &
                IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) ? 1 : 0;

        break;

    case IW_AUTH_DROP_UNENCRYPTED:
        param->value = ieee->drop_unencrypted;
        break;

    case IW_AUTH_80211_AUTH_ALG:
        param->value = ieee->sec.auth_mode;
        break;

    case IW_AUTH_WPA_ENABLED:
        param->value = ieee->wpa_enabled;
        break;

    case IW_AUTH_RX_UNENCRYPTED_EAPOL:
        param->value = ieee->ieee802_1x;
        break;

    case IW_AUTH_ROAMING_CONTROL:
    case IW_AUTH_PRIVACY_INVOKED:
        param->value = ieee->privacy_invoked;
        break;

    default:
        return -EOPNOTSUPP;
    }
    return 0;
}

/* SIOCSIWENCODEEXT */
static int ipw_wx_set_encodeext(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;

    if (hwcrypto) {
        if (ext->alg == IW_ENCODE_ALG_TKIP) {
            /* IPW HW can't build TKIP MIC,
               host decryption still needed */
            if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY)
                priv->ieee->host_mc_decrypt = 1;
            else {
                priv->ieee->host_encrypt = 0;
                priv->ieee->host_encrypt_msdu = 1;
                priv->ieee->host_decrypt = 1;
            }
        } else {
            priv->ieee->host_encrypt = 0;
            priv->ieee->host_encrypt_msdu = 0;
            priv->ieee->host_decrypt = 0;
            priv->ieee->host_mc_decrypt = 0;
        }
    }

    return libipw_wx_set_encodeext(priv->ieee, info, wrqu, extra);
}

/* SIOCGIWENCODEEXT */
static int ipw_wx_get_encodeext(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    return libipw_wx_get_encodeext(priv->ieee, info, wrqu, extra);
}

/* SIOCSIWMLME */
static int ipw_wx_set_mlme(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct iw_mlme *mlme = (struct iw_mlme *)extra;
    __le16 reason;

    reason = cpu_to_le16(mlme->reason_code);

    switch (mlme->cmd) {
    case IW_MLME_DEAUTH:
        /* silently ignore */
        break;

    case IW_MLME_DISASSOC:
        ipw_disassociate(priv);
        break;

    default:
        return -EOPNOTSUPP;
    }
    return 0;
}

#ifdef CONFIG_IPW2200_QOS

/* QoS */
/*
* get the modulation type of the current network or
* the card current mode
*/
static u8 ipw_qos_current_mode(struct ipw_priv * priv)
{
    u8 mode = 0;

    if (priv->status & STATUS_ASSOCIATED) {
        unsigned long flags;

        spin_lock_irqsave(&priv->ieee->lock, flags);
        mode = priv->assoc_network->mode;
        spin_unlock_irqrestore(&priv->ieee->lock, flags);
    } else {
        mode = priv->ieee->mode;
    }
    IPW_DEBUG_QOS("QoS network/card mode %d\n", mode);
    return mode;
}

/*
* Handle management frame beacon and probe response
*/
static int ipw_qos_handle_probe_response(struct ipw_priv *priv,
                     int active_network,
                     struct libipw_network *network)
{
    u32 size = sizeof(struct libipw_qos_parameters);

    if (network->capability & WLAN_CAPABILITY_IBSS)
        network->qos_data.active = network->qos_data.supported;

    if (network->flags & NETWORK_HAS_QOS_MASK) {
        if (active_network &&
            (network->flags & NETWORK_HAS_QOS_PARAMETERS))
            network->qos_data.active = network->qos_data.supported;

        if ((network->qos_data.active == 1) && (active_network == 1) &&
            (network->flags & NETWORK_HAS_QOS_PARAMETERS) &&
            (network->qos_data.old_param_count !=
             network->qos_data.param_count)) {
            network->qos_data.old_param_count =
                network->qos_data.param_count;
            schedule_work(&priv->qos_activate);
            IPW_DEBUG_QOS("QoS parameters change call "
                      "qos_activate\n");
        }
    } else {
        if ((priv->ieee->mode == IEEE_B) || (network->mode == IEEE_B))
            memcpy(&network->qos_data.parameters,
                   &def_parameters_CCK, size);
        else
            memcpy(&network->qos_data.parameters,
                   &def_parameters_OFDM, size);

        if ((network->qos_data.active == 1) && (active_network == 1)) {
            IPW_DEBUG_QOS("QoS was disabled call qos_activate\n");
            schedule_work(&priv->qos_activate);
        }

        network->qos_data.active = 0;
        network->qos_data.supported = 0;
    }
    if ((priv->status & STATUS_ASSOCIATED) &&
        (priv->ieee->iw_mode == IW_MODE_ADHOC) && (active_network == 0)) {
        if (memcmp(network->bssid, priv->bssid, ETH_ALEN))
            if (network->capability & WLAN_CAPABILITY_IBSS)
                if ((network->ssid_len ==
                     priv->assoc_network->ssid_len) &&
                    !memcmp(network->ssid,
                        priv->assoc_network->ssid,
                        network->ssid_len)) {
                    schedule_work(&priv->merge_networks);
                }
    }

    return 0;
}

/*
* This function set up the firmware to support QoS. It sends
* IPW_CMD_QOS_PARAMETERS and IPW_CMD_WME_INFO
*/
static int ipw_qos_activate(struct ipw_priv *priv,
                struct libipw_qos_data *qos_network_data)
{
    int err;
    struct libipw_qos_parameters qos_parameters[QOS_QOS_SETS];
    struct libipw_qos_parameters *active_one = NULL;
    u32 size = sizeof(struct libipw_qos_parameters);
    u32 burst_duration;
    int i;
    u8 type;

    type = ipw_qos_current_mode(priv);

    active_one = &(qos_parameters[QOS_PARAM_SET_DEF_CCK]);
    memcpy(active_one, priv->qos_data.def_qos_parm_CCK, size);
    active_one = &(qos_parameters[QOS_PARAM_SET_DEF_OFDM]);
    memcpy(active_one, priv->qos_data.def_qos_parm_OFDM, size);

    if (qos_network_data == NULL) {
        if (type == IEEE_B) {
            IPW_DEBUG_QOS("QoS activate network mode %d\n", type);
            active_one = &def_parameters_CCK;
        } else
            active_one = &def_parameters_OFDM;

        memcpy(&qos_parameters[QOS_PARAM_SET_ACTIVE], active_one, size);
        burst_duration = ipw_qos_get_burst_duration(priv);
        for (i = 0; i < QOS_QUEUE_NUM; i++)
            qos_parameters[QOS_PARAM_SET_ACTIVE].tx_op_limit[i] =
                cpu_to_le16(burst_duration);
    } else if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
        if (type == IEEE_B) {
            IPW_DEBUG_QOS("QoS activate IBSS network mode %d\n",
                      type);
            if (priv->qos_data.qos_enable == 0)
                active_one = &def_parameters_CCK;
            else
                active_one = priv->qos_data.def_qos_parm_CCK;
        } else {
            if (priv->qos_data.qos_enable == 0)
                active_one = &def_parameters_OFDM;
            else
                active_one = priv->qos_data.def_qos_parm_OFDM;
        }
        memcpy(&qos_parameters[QOS_PARAM_SET_ACTIVE], active_one, size);
    } else {
        unsigned long flags;
        int active;

        spin_lock_irqsave(&priv->ieee->lock, flags);
        active_one = &(qos_network_data->parameters);
        qos_network_data->old_param_count =
            qos_network_data->param_count;
        memcpy(&qos_parameters[QOS_PARAM_SET_ACTIVE], active_one, size);
        active = qos_network_data->supported;
        spin_unlock_irqrestore(&priv->ieee->lock, flags);

        if (active == 0) {
            burst_duration = ipw_qos_get_burst_duration(priv);
            for (i = 0; i < QOS_QUEUE_NUM; i++)
                qos_parameters[QOS_PARAM_SET_ACTIVE].
                    tx_op_limit[i] = cpu_to_le16(burst_duration);
        }
    }

    IPW_DEBUG_QOS("QoS sending IPW_CMD_QOS_PARAMETERS\n");
    err = ipw_send_qos_params_command(priv, &qos_parameters[0]);
    if (err)
        IPW_DEBUG_QOS("QoS IPW_CMD_QOS_PARAMETERS failed\n");

    return err;
}

/*
* send IPW_CMD_WME_INFO to the firmware
*/
static int ipw_qos_set_info_element(struct ipw_priv *priv)
{
    int ret = 0;
    struct libipw_qos_information_element qos_info;

    if (priv == NULL)
        return -1;

    qos_info.elementID = QOS_ELEMENT_ID;
    qos_info.length = sizeof(struct libipw_qos_information_element) - 2;

    qos_info.version = QOS_VERSION_1;
    qos_info.ac_info = 0;

    memcpy(qos_info.qui, qos_oui, QOS_OUI_LEN);
    qos_info.qui_type = QOS_OUI_TYPE;
    qos_info.qui_subtype = QOS_OUI_INFO_SUB_TYPE;

    ret = ipw_send_qos_info_command(priv, &qos_info);
    if (ret != 0) {
        IPW_DEBUG_QOS("QoS error calling ipw_send_qos_info_command\n");
    }
    return ret;
}

/*
* Set the QoS parameter with the association request structure
*/
static int ipw_qos_association(struct ipw_priv *priv,
                   struct libipw_network *network)
{
    int err = 0;
    struct libipw_qos_data *qos_data = NULL;
    struct libipw_qos_data ibss_data = {
        .supported = 1,
        .active = 1,
    };

    switch (priv->ieee->iw_mode) {
    case IW_MODE_ADHOC:
        BUG_ON(!(network->capability & WLAN_CAPABILITY_IBSS));

        qos_data = &ibss_data;
        break;

    case IW_MODE_INFRA:
        qos_data = &network->qos_data;
        break;

    default:
        BUG();
        break;
    }

    err = ipw_qos_activate(priv, qos_data);
    if (err) {
        priv->assoc_request.policy_support &= ~HC_QOS_SUPPORT_ASSOC;
        return err;
    }

    if (priv->qos_data.qos_enable && qos_data->supported) {
        IPW_DEBUG_QOS("QoS will be enabled for this association\n");
        priv->assoc_request.policy_support |= HC_QOS_SUPPORT_ASSOC;
        return ipw_qos_set_info_element(priv);
    }

    return 0;
}

/*
* handling the beaconing responses. if we get different QoS setting
* off the network from the associated setting, adjust the QoS
* setting
*/
static int ipw_qos_association_resp(struct ipw_priv *priv,
                    struct libipw_network *network)
{
    int ret = 0;
    unsigned long flags;
    u32 size = sizeof(struct libipw_qos_parameters);
    int set_qos_param = 0;

    if ((priv == NULL) || (network == NULL) ||
        (priv->assoc_network == NULL))
        return ret;

    if (!(priv->status & STATUS_ASSOCIATED))
        return ret;

    if ((priv->ieee->iw_mode != IW_MODE_INFRA))
        return ret;

    spin_lock_irqsave(&priv->ieee->lock, flags);
    if (network->flags & NETWORK_HAS_QOS_PARAMETERS) {
        memcpy(&priv->assoc_network->qos_data, &network->qos_data,
               sizeof(struct libipw_qos_data));
        priv->assoc_network->qos_data.active = 1;
        if ((network->qos_data.old_param_count !=
             network->qos_data.param_count)) {
            set_qos_param = 1;
            network->qos_data.old_param_count =
                network->qos_data.param_count;
        }

    } else {
        if ((network->mode == IEEE_B) || (priv->ieee->mode == IEEE_B))
            memcpy(&priv->assoc_network->qos_data.parameters,
                   &def_parameters_CCK, size);
        else
            memcpy(&priv->assoc_network->qos_data.parameters,
                   &def_parameters_OFDM, size);
        priv->assoc_network->qos_data.active = 0;
        priv->assoc_network->qos_data.supported = 0;
        set_qos_param = 1;
    }

    spin_unlock_irqrestore(&priv->ieee->lock, flags);

    if (set_qos_param == 1)
        schedule_work(&priv->qos_activate);

    return ret;
}

static u32 ipw_qos_get_burst_duration(struct ipw_priv *priv)
{
    u32 ret = 0;

    if ((priv == NULL))
        return 0;

    if (!(priv->ieee->modulation & LIBIPW_OFDM_MODULATION))
        ret = priv->qos_data.burst_duration_CCK;
    else
        ret = priv->qos_data.burst_duration_OFDM;

    return ret;
}

/*
* Initialize the setting of QoS global
*/
static void ipw_qos_init(struct ipw_priv *priv, int enable,
             int burst_enable, u32 burst_duration_CCK,
             u32 burst_duration_OFDM)
{
    priv->qos_data.qos_enable = enable;

    if (priv->qos_data.qos_enable) {
        priv->qos_data.def_qos_parm_CCK = &def_qos_parameters_CCK;
        priv->qos_data.def_qos_parm_OFDM = &def_qos_parameters_OFDM;
        IPW_DEBUG_QOS("QoS is enabled\n");
    } else {
        priv->qos_data.def_qos_parm_CCK = &def_parameters_CCK;
        priv->qos_data.def_qos_parm_OFDM = &def_parameters_OFDM;
        IPW_DEBUG_QOS("QoS is not enabled\n");
    }

    priv->qos_data.burst_enable = burst_enable;

    if (burst_enable) {
        priv->qos_data.burst_duration_CCK = burst_duration_CCK;
        priv->qos_data.burst_duration_OFDM = burst_duration_OFDM;
    } else {
        priv->qos_data.burst_duration_CCK = 0;
        priv->qos_data.burst_duration_OFDM = 0;
    }
}

/*
* map the packet priority to the right TX Queue
*/
static int ipw_get_tx_queue_number(struct ipw_priv *priv, u16 priority)
{
    if (priority > 7 || !priv->qos_data.qos_enable)
        priority = 0;

    return from_priority_to_tx_queue[priority] - 1;
}

static int ipw_is_qos_active(struct net_device *dev,
                 struct sk_buff *skb)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct libipw_qos_data *qos_data = NULL;
    int active, supported;
    u8 *daddr = skb->data + ETH_ALEN;
    int unicast = !is_multicast_ether_addr(daddr);

    if (!(priv->status & STATUS_ASSOCIATED))
        return 0;

    qos_data = &priv->assoc_network->qos_data;

    if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
        if (unicast == 0)
            qos_data->active = 0;
        else
            qos_data->active = qos_data->supported;
    }
    active = qos_data->active;
    supported = qos_data->supported;
    IPW_DEBUG_QOS("QoS  %d network is QoS active %d  supported %d  "
              "unicast %d\n",
              priv->qos_data.qos_enable, active, supported, unicast);
    if (active && priv->qos_data.qos_enable)
        return 1;

    return 0;

}
/*
* add QoS parameter to the TX command
*/
static int ipw_qos_set_tx_queue_command(struct ipw_priv *priv,
                    u16 priority,
                    struct tfd_data *tfd)
{
    int tx_queue_id = 0;


    tx_queue_id = from_priority_to_tx_queue[priority] - 1;
    tfd->tx_flags_ext |= DCT_FLAG_EXT_QOS_ENABLED;

    if (priv->qos_data.qos_no_ack_mask & (1UL << tx_queue_id)) {
        tfd->tx_flags &= ~DCT_FLAG_ACK_REQD;
        tfd->tfd.tfd_26.mchdr.qos_ctrl |= cpu_to_le16(CTRL_QOS_NO_ACK);
    }
    return 0;
}

/*
* background support to run QoS activate functionality
*/
static void ipw_bg_qos_activate(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, qos_activate);

    mutex_lock(&priv->mutex);

    if (priv->status & STATUS_ASSOCIATED)
        ipw_qos_activate(priv, &(priv->assoc_network->qos_data));

    mutex_unlock(&priv->mutex);
}

static int ipw_handle_probe_response(struct net_device *dev,
                     struct libipw_probe_response *resp,
                     struct libipw_network *network)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int active_network = ((priv->status & STATUS_ASSOCIATED) &&
                  (network == priv->assoc_network));

    ipw_qos_handle_probe_response(priv, active_network, network);

    return 0;
}

static int ipw_handle_beacon(struct net_device *dev,
                 struct libipw_beacon *resp,
                 struct libipw_network *network)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int active_network = ((priv->status & STATUS_ASSOCIATED) &&
                  (network == priv->assoc_network));

    ipw_qos_handle_probe_response(priv, active_network, network);

    return 0;
}

static int ipw_handle_assoc_response(struct net_device *dev,
                     struct libipw_assoc_response *resp,
                     struct libipw_network *network)
{
    struct ipw_priv *priv = libipw_priv(dev);
    ipw_qos_association_resp(priv, network);
    return 0;
}

static int ipw_send_qos_params_command(struct ipw_priv *priv, struct libipw_qos_parameters
                       *qos_param)
{
    return ipw_send_cmd_pdu(priv, IPW_CMD_QOS_PARAMETERS,
                sizeof(*qos_param) * 3, qos_param);
}

static int ipw_send_qos_info_command(struct ipw_priv *priv, struct libipw_qos_information_element
                     *qos_param)
{
    return ipw_send_cmd_pdu(priv, IPW_CMD_WME_INFO, sizeof(*qos_param),
                qos_param);
}

#endif              /* CONFIG_IPW2200_QOS */

static int ipw_associate_network(struct ipw_priv *priv,
                 struct libipw_network *network,
                 struct ipw_supported_rates *rates, int roaming)
{
    int err;
    DECLARE_SSID_BUF(ssid);

    if (priv->config & CFG_FIXED_RATE)
        ipw_set_fixed_rate(priv, network->mode);

    if (!(priv->config & CFG_STATIC_ESSID)) {
        priv->essid_len = min(network->ssid_len,
                      (u8) IW_ESSID_MAX_SIZE);
        memcpy(priv->essid, network->ssid, priv->essid_len);
    }

    network->last_associate = jiffies;

    memset(&priv->assoc_request, 0, sizeof(priv->assoc_request));
    priv->assoc_request.channel = network->channel;
    priv->assoc_request.auth_key = 0;

    if ((priv->capability & CAP_PRIVACY_ON) &&
        (priv->ieee->sec.auth_mode == WLAN_AUTH_SHARED_KEY)) {
        priv->assoc_request.auth_type = AUTH_SHARED_KEY;
        priv->assoc_request.auth_key = priv->ieee->sec.active_key;

        if (priv->ieee->sec.level == SEC_LEVEL_1)
            ipw_send_wep_keys(priv, DCW_WEP_KEY_SEC_TYPE_WEP);

    } else if ((priv->capability & CAP_PRIVACY_ON) &&
           (priv->ieee->sec.auth_mode == WLAN_AUTH_LEAP))
        priv->assoc_request.auth_type = AUTH_LEAP;
    else
        priv->assoc_request.auth_type = AUTH_OPEN;

    if (priv->ieee->wpa_ie_len) {
        priv->assoc_request.policy_support = cpu_to_le16(0x02); /* RSN active */
        ipw_set_rsn_capa(priv, priv->ieee->wpa_ie,
                 priv->ieee->wpa_ie_len);
    }

    /*
     * It is valid for our ieee device to support multiple modes, but
     * when it comes to associating to a given network we have to choose
     * just one mode.
     */
    if (network->mode & priv->ieee->mode & IEEE_A)
        priv->assoc_request.ieee_mode = IPW_A_MODE;
    else if (network->mode & priv->ieee->mode & IEEE_G)
        priv->assoc_request.ieee_mode = IPW_G_MODE;
    else if (network->mode & priv->ieee->mode & IEEE_B)
        priv->assoc_request.ieee_mode = IPW_B_MODE;

    priv->assoc_request.capability = cpu_to_le16(network->capability);
    if ((network->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
        && !(priv->config & CFG_PREAMBLE_LONG)) {
        priv->assoc_request.preamble_length = DCT_FLAG_SHORT_PREAMBLE;
    } else {
        priv->assoc_request.preamble_length = DCT_FLAG_LONG_PREAMBLE;

        /* Clear the short preamble if we won't be supporting it */
        priv->assoc_request.capability &=
            ~cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
    }

    /* Clear capability bits that aren't used in Ad Hoc */
    if (priv->ieee->iw_mode == IW_MODE_ADHOC)
        priv->assoc_request.capability &=
            ~cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME);

    IPW_DEBUG_ASSOC("%ssociation attempt: '%s', channel %d, "
            "802.11%c [%d], %s[:%s], enc=%s%s%s%c%c\n",
            roaming ? "Rea" : "A",
            print_ssid(ssid, priv->essid, priv->essid_len),
            network->channel,
            ipw_modes[priv->assoc_request.ieee_mode],
            rates->num_rates,
            (priv->assoc_request.preamble_length ==
             DCT_FLAG_LONG_PREAMBLE) ? "long" : "short",
            network->capability &
            WLAN_CAPABILITY_SHORT_PREAMBLE ? "short" : "long",
            priv->capability & CAP_PRIVACY_ON ? "on " : "off",
            priv->capability & CAP_PRIVACY_ON ?
            (priv->capability & CAP_SHARED_KEY ? "(shared)" :
             "(open)") : "",
            priv->capability & CAP_PRIVACY_ON ? " key=" : "",
            priv->capability & CAP_PRIVACY_ON ?
            '1' + priv->ieee->sec.active_key : '.',
            priv->capability & CAP_PRIVACY_ON ? '.' : ' ');

    priv->assoc_request.beacon_interval = cpu_to_le16(network->beacon_interval);
    if ((priv->ieee->iw_mode == IW_MODE_ADHOC) &&
        (network->time_stamp[0] == 0) && (network->time_stamp[1] == 0)) {
        priv->assoc_request.assoc_type = HC_IBSS_START;
        priv->assoc_request.assoc_tsf_msw = 0;
        priv->assoc_request.assoc_tsf_lsw = 0;
    } else {
        if (unlikely(roaming))
            priv->assoc_request.assoc_type = HC_REASSOCIATE;
        else
            priv->assoc_request.assoc_type = HC_ASSOCIATE;
        priv->assoc_request.assoc_tsf_msw = cpu_to_le32(network->time_stamp[1]);
        priv->assoc_request.assoc_tsf_lsw = cpu_to_le32(network->time_stamp[0]);
    }

    memcpy(priv->assoc_request.bssid, network->bssid, ETH_ALEN);

    if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
        memset(&priv->assoc_request.dest, 0xFF, ETH_ALEN);
        priv->assoc_request.atim_window = cpu_to_le16(network->atim_window);
    } else {
        memcpy(priv->assoc_request.dest, network->bssid, ETH_ALEN);
        priv->assoc_request.atim_window = 0;
    }

    priv->assoc_request.listen_interval = cpu_to_le16(network->listen_interval);

    err = ipw_send_ssid(priv, priv->essid, priv->essid_len);
    if (err) {
        IPW_DEBUG_HC("Attempt to send SSID command failed.\n");
        return err;
    }

    rates->ieee_mode = priv->assoc_request.ieee_mode;
    rates->purpose = IPW_RATE_CONNECT;
    ipw_send_supported_rates(priv, rates);

    if (priv->assoc_request.ieee_mode == IPW_G_MODE)
        priv->sys_config.dot11g_auto_detection = 1;
    else
        priv->sys_config.dot11g_auto_detection = 0;

    if (priv->ieee->iw_mode == IW_MODE_ADHOC)
        priv->sys_config.answer_broadcast_ssid_probe = 1;
    else
        priv->sys_config.answer_broadcast_ssid_probe = 0;

    err = ipw_send_system_config(priv);
    if (err) {
        IPW_DEBUG_HC("Attempt to send sys config command failed.\n");
        return err;
    }

    IPW_DEBUG_ASSOC("Association sensitivity: %d\n", network->stats.rssi);
    err = ipw_set_sensitivity(priv, network->stats.rssi + IPW_RSSI_TO_DBM);
    if (err) {
        IPW_DEBUG_HC("Attempt to send associate command failed.\n");
        return err;
    }

    /*
     * If preemption is enabled, it is possible for the association
     * to complete before we return from ipw_send_associate.  Therefore
     * we have to be sure and update our priviate data first.
     */
    priv->channel = network->channel;
    memcpy(priv->bssid, network->bssid, ETH_ALEN);
    priv->status |= STATUS_ASSOCIATING;
    priv->status &= ~STATUS_SECURITY_UPDATED;

    priv->assoc_network = network;

#ifdef CONFIG_IPW2200_QOS
    ipw_qos_association(priv, network);
#endif

    err = ipw_send_associate(priv, &priv->assoc_request);
    if (err) {
        IPW_DEBUG_HC("Attempt to send associate command failed.\n");
        return err;
    }

    IPW_DEBUG(IPW_DL_STATE, "associating: '%s' %pM\n",
          print_ssid(ssid, priv->essid, priv->essid_len),
          priv->bssid);

    return 0;
}

static void ipw_roam(void *data)
{
    struct ipw_priv *priv = data;
    struct libipw_network *network = NULL;
    struct ipw_network_match match = {
        .network = priv->assoc_network
    };

    /* The roaming process is as follows:
     *
     * 1.  Missed beacon threshold triggers the roaming process by
     *     setting the status ROAM bit and requesting a scan.
     * 2.  When the scan completes, it schedules the ROAM work
     * 3.  The ROAM work looks at all of the known networks for one that
     *     is a better network than the currently associated.  If none
     *     found, the ROAM process is over (ROAM bit cleared)
     * 4.  If a better network is found, a disassociation request is
     *     sent.
     * 5.  When the disassociation completes, the roam work is again
     *     scheduled.  The second time through, the driver is no longer
     *     associated, and the newly selected network is sent an
     *     association request.
     * 6.  At this point ,the roaming process is complete and the ROAM
     *     status bit is cleared.
     */

    /* If we are no longer associated, and the roaming bit is no longer
     * set, then we are not actively roaming, so just return */
    if (!(priv->status & (STATUS_ASSOCIATED | STATUS_ROAMING)))
        return;

    if (priv->status & STATUS_ASSOCIATED) {
        /* First pass through ROAM process -- look for a better
         * network */
        unsigned long flags;
        u8 rssi = priv->assoc_network->stats.rssi;
        priv->assoc_network->stats.rssi = -128;
        spin_lock_irqsave(&priv->ieee->lock, flags);
        list_for_each_entry(network, &priv->ieee->network_list, list) {
            if (network != priv->assoc_network)
                ipw_best_network(priv, &match, network, 1);
        }
        spin_unlock_irqrestore(&priv->ieee->lock, flags);
        priv->assoc_network->stats.rssi = rssi;

        if (match.network == priv->assoc_network) {
            IPW_DEBUG_ASSOC("No better APs in this network to "
                    "roam to.\n");
            priv->status &= ~STATUS_ROAMING;
            ipw_debug_config(priv);
            return;
        }

        ipw_send_disassociate(priv, 1);
        priv->assoc_network = match.network;

        return;
    }

    /* Second pass through ROAM process -- request association */
    ipw_compatible_rates(priv, priv->assoc_network, &match.rates);
    ipw_associate_network(priv, priv->assoc_network, &match.rates, 1);
    priv->status &= ~STATUS_ROAMING;
}

static void ipw_bg_roam(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, roam);
    mutex_lock(&priv->mutex);
    ipw_roam(priv);
    mutex_unlock(&priv->mutex);
}

static int ipw_associate(void *data)
{
    struct ipw_priv *priv = data;

    struct libipw_network *network = NULL;
    struct ipw_network_match match = {
        .network = NULL
    };
    struct ipw_supported_rates *rates;
    struct list_head *element;
    unsigned long flags;
    DECLARE_SSID_BUF(ssid);

    if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
        IPW_DEBUG_ASSOC("Not attempting association (monitor mode)\n");
        return 0;
    }

    if (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
        IPW_DEBUG_ASSOC("Not attempting association (already in "
                "progress)\n");
        return 0;
    }

    if (priv->status & STATUS_DISASSOCIATING) {
        IPW_DEBUG_ASSOC("Not attempting association (in "
                "disassociating)\n ");
        schedule_work(&priv->associate);
        return 0;
    }

    if (!ipw_is_init(priv) || (priv->status & STATUS_SCANNING)) {
        IPW_DEBUG_ASSOC("Not attempting association (scanning or not "
                "initialized)\n");
        return 0;
    }

    if (!(priv->config & CFG_ASSOCIATE) &&
        !(priv->config & (CFG_STATIC_ESSID | CFG_STATIC_BSSID))) {
        IPW_DEBUG_ASSOC("Not attempting association (associate=0)\n");
        return 0;
    }

    /* Protect our use of the network_list */
    spin_lock_irqsave(&priv->ieee->lock, flags);
    list_for_each_entry(network, &priv->ieee->network_list, list)
        ipw_best_network(priv, &match, network, 0);

    network = match.network;
    rates = &match.rates;

    if (network == NULL &&
        priv->ieee->iw_mode == IW_MODE_ADHOC &&
        priv->config & CFG_ADHOC_CREATE &&
        priv->config & CFG_STATIC_ESSID &&
        priv->config & CFG_STATIC_CHANNEL) {
        /* Use oldest network if the free list is empty */
        if (list_empty(&priv->ieee->network_free_list)) {
            struct libipw_network *oldest = NULL;
            struct libipw_network *target;

            list_for_each_entry(target, &priv->ieee->network_list, list) {
                if ((oldest == NULL) ||
                    (target->last_scanned < oldest->last_scanned))
                    oldest = target;
            }

            /* If there are no more slots, expire the oldest */
            list_del(&oldest->list);
            target = oldest;
            IPW_DEBUG_ASSOC("Expired '%s' (%pM) from "
                    "network list.\n",
                    print_ssid(ssid, target->ssid,
                           target->ssid_len),
                    target->bssid);
            list_add_tail(&target->list,
                      &priv->ieee->network_free_list);
        }

        element = priv->ieee->network_free_list.next;
        network = list_entry(element, struct libipw_network, list);
        ipw_adhoc_create(priv, network);
        rates = &priv->rates;
        list_del(element);
        list_add_tail(&network->list, &priv->ieee->network_list);
    }
    spin_unlock_irqrestore(&priv->ieee->lock, flags);

    /* If we reached the end of the list, then we don't have any valid
     * matching APs */
    if (!network) {
        ipw_debug_config(priv);

        if (!(priv->status & STATUS_SCANNING)) {
            if (!(priv->config & CFG_SPEED_SCAN))
                schedule_delayed_work(&priv->request_scan,
                              SCAN_INTERVAL);
            else
                schedule_delayed_work(&priv->request_scan, 0);
        }

        return 0;
    }

    ipw_associate_network(priv, network, rates, 0);

    return 1;
}

static void ipw_bg_associate(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, associate);
    mutex_lock(&priv->mutex);
    ipw_associate(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_rebuild_decrypted_skb(struct ipw_priv *priv,
                      struct sk_buff *skb)
{
    struct ieee80211_hdr *hdr;
    u16 fc;

    hdr = (struct ieee80211_hdr *)skb->data;
    fc = le16_to_cpu(hdr->frame_control);
    if (!(fc & IEEE80211_FCTL_PROTECTED))
        return;

    fc &= ~IEEE80211_FCTL_PROTECTED;
    hdr->frame_control = cpu_to_le16(fc);
    switch (priv->ieee->sec.level) {
    case SEC_LEVEL_3:
        /* Remove CCMP HDR */
        memmove(skb->data + LIBIPW_3ADDR_LEN,
            skb->data + LIBIPW_3ADDR_LEN + 8,
            skb->len - LIBIPW_3ADDR_LEN - 8);
        skb_trim(skb, skb->len - 16);   /* CCMP_HDR_LEN + CCMP_MIC_LEN */
        break;
    case SEC_LEVEL_2:
        break;
    case SEC_LEVEL_1:
        /* Remove IV */
        memmove(skb->data + LIBIPW_3ADDR_LEN,
            skb->data + LIBIPW_3ADDR_LEN + 4,
            skb->len - LIBIPW_3ADDR_LEN - 4);
        skb_trim(skb, skb->len - 8);    /* IV + ICV */
        break;
    case SEC_LEVEL_0:
        break;
    default:
        printk(KERN_ERR "Unknown security level %d\n",
               priv->ieee->sec.level);
        break;
    }
}

static void ipw_handle_data_packet(struct ipw_priv *priv,
                   struct ipw_rx_mem_buffer *rxb,
                   struct libipw_rx_stats *stats)
{
    struct net_device *dev = priv->net_dev;
    struct libipw_hdr_4addr *hdr;
    struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;

    /* We received data from the HW, so stop the watchdog */
    dev->trans_start = jiffies;

    /* We only process data packets if the
     * interface is open */
    if (unlikely((le16_to_cpu(pkt->u.frame.length) + IPW_RX_FRAME_SIZE) >
             skb_tailroom(rxb->skb))) {
        dev->stats.rx_errors++;
        priv->wstats.discard.misc++;
        IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
        return;
    } else if (unlikely(!netif_running(priv->net_dev))) {
        dev->stats.rx_dropped++;
        priv->wstats.discard.misc++;
        IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
        return;
    }

    /* Advance skb->data to the start of the actual payload */
    skb_reserve(rxb->skb, offsetof(struct ipw_rx_packet, u.frame.data));

    /* Set the size of the skb to the size of the frame */
    skb_put(rxb->skb, le16_to_cpu(pkt->u.frame.length));

    IPW_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);

    /* HW decrypt will not clear the WEP bit, MIC, PN, etc. */
    hdr = (struct libipw_hdr_4addr *)rxb->skb->data;
    if (priv->ieee->iw_mode != IW_MODE_MONITOR &&
        (is_multicast_ether_addr(hdr->addr1) ?
         !priv->ieee->host_mc_decrypt : !priv->ieee->host_decrypt))
        ipw_rebuild_decrypted_skb(priv, rxb->skb);

    if (!libipw_rx(priv->ieee, rxb->skb, stats))
        dev->stats.rx_errors++;
    else {          /* libipw_rx succeeded, so it now owns the SKB */
        rxb->skb = NULL;
        __ipw_led_activity_on(priv);
    }
}

#ifdef CONFIG_IPW2200_RADIOTAP
static void ipw_handle_data_packet_monitor(struct ipw_priv *priv,
                       struct ipw_rx_mem_buffer *rxb,
                       struct libipw_rx_stats *stats)
{
    struct net_device *dev = priv->net_dev;
    struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;
    struct ipw_rx_frame *frame = &pkt->u.frame;

    /* initial pull of some data */
    u16 received_channel = frame->received_channel;
    u8 antennaAndPhy = frame->antennaAndPhy;
    s8 antsignal = frame->rssi_dbm - IPW_RSSI_TO_DBM;   /* call it signed anyhow */
    u16 pktrate = frame->rate;

    /* Magic struct that slots into the radiotap header -- no reason
     * to build this manually element by element, we can write it much
     * more efficiently than we can parse it. ORDER MATTERS HERE */
    struct ipw_rt_hdr *ipw_rt;

    unsigned short len = le16_to_cpu(pkt->u.frame.length);

    /* We received data from the HW, so stop the watchdog */
    dev->trans_start = jiffies;

    /* We only process data packets if the
     * interface is open */
    if (unlikely((le16_to_cpu(pkt->u.frame.length) + IPW_RX_FRAME_SIZE) >
             skb_tailroom(rxb->skb))) {
        dev->stats.rx_errors++;
        priv->wstats.discard.misc++;
        IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
        return;
    } else if (unlikely(!netif_running(priv->net_dev))) {
        dev->stats.rx_dropped++;
        priv->wstats.discard.misc++;
        IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
        return;
    }

    /* Libpcap 0.9.3+ can handle variable length radiotap, so we'll use
     * that now */
    if (len > IPW_RX_BUF_SIZE - sizeof(struct ipw_rt_hdr)) {
        /* FIXME: Should alloc bigger skb instead */
        dev->stats.rx_dropped++;
        priv->wstats.discard.misc++;
        IPW_DEBUG_DROP("Dropping too large packet in monitor\n");
        return;
    }

    /* copy the frame itself */
    memmove(rxb->skb->data + sizeof(struct ipw_rt_hdr),
        rxb->skb->data + IPW_RX_FRAME_SIZE, len);

    ipw_rt = (struct ipw_rt_hdr *)rxb->skb->data;

    ipw_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
    ipw_rt->rt_hdr.it_pad = 0;  /* always good to zero */
    ipw_rt->rt_hdr.it_len = cpu_to_le16(sizeof(struct ipw_rt_hdr)); /* total header+data */

    /* Big bitfield of all the fields we provide in radiotap */
    ipw_rt->rt_hdr.it_present = cpu_to_le32(
         (1 << IEEE80211_RADIOTAP_TSFT) |
         (1 << IEEE80211_RADIOTAP_FLAGS) |
         (1 << IEEE80211_RADIOTAP_RATE) |
         (1 << IEEE80211_RADIOTAP_CHANNEL) |
         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
         (1 << IEEE80211_RADIOTAP_ANTENNA));

    /* Zero the flags, we'll add to them as we go */
    ipw_rt->rt_flags = 0;
    ipw_rt->rt_tsf = (u64)(frame->parent_tsf[3] << 24 |
                   frame->parent_tsf[2] << 16 |
                   frame->parent_tsf[1] << 8  |
                   frame->parent_tsf[0]);

    /* Convert signal to DBM */
    ipw_rt->rt_dbmsignal = antsignal;
    ipw_rt->rt_dbmnoise = (s8) le16_to_cpu(frame->noise);

    /* Convert the channel data and set the flags */
    ipw_rt->rt_channel = cpu_to_le16(ieee80211chan2mhz(received_channel));
    if (received_channel > 14) {    /* 802.11a */
        ipw_rt->rt_chbitmask =
            cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
    } else if (antennaAndPhy & 32) {    /* 802.11b */
        ipw_rt->rt_chbitmask =
            cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
    } else {        /* 802.11g */
        ipw_rt->rt_chbitmask =
            cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ);
    }

    /* set the rate in multiples of 500k/s */
    switch (pktrate) {
    case IPW_TX_RATE_1MB:
        ipw_rt->rt_rate = 2;
        break;
    case IPW_TX_RATE_2MB:
        ipw_rt->rt_rate = 4;
        break;
    case IPW_TX_RATE_5MB:
        ipw_rt->rt_rate = 10;
        break;
    case IPW_TX_RATE_6MB:
        ipw_rt->rt_rate = 12;
        break;
    case IPW_TX_RATE_9MB:
        ipw_rt->rt_rate = 18;
        break;
    case IPW_TX_RATE_11MB:
        ipw_rt->rt_rate = 22;
        break;
    case IPW_TX_RATE_12MB:
        ipw_rt->rt_rate = 24;
        break;
    case IPW_TX_RATE_18MB:
        ipw_rt->rt_rate = 36;
        break;
    case IPW_TX_RATE_24MB:
        ipw_rt->rt_rate = 48;
        break;
    case IPW_TX_RATE_36MB:
        ipw_rt->rt_rate = 72;
        break;
    case IPW_TX_RATE_48MB:
        ipw_rt->rt_rate = 96;
        break;
    case IPW_TX_RATE_54MB:
        ipw_rt->rt_rate = 108;
        break;
    default:
        ipw_rt->rt_rate = 0;
        break;
    }

    /* antenna number */
    ipw_rt->rt_antenna = (antennaAndPhy & 3);   /* Is this right? */

    /* set the preamble flag if we have it */
    if ((antennaAndPhy & 64))
        ipw_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

    /* Set the size of the skb to the size of the frame */
    skb_put(rxb->skb, len + sizeof(struct ipw_rt_hdr));

    IPW_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);

    if (!libipw_rx(priv->ieee, rxb->skb, stats))
        dev->stats.rx_errors++;
    else {          /* libipw_rx succeeded, so it now owns the SKB */
        rxb->skb = NULL;
        /* no LED during capture */
    }
}
#endif

#ifdef CONFIG_IPW2200_PROMISCUOUS
#define libipw_is_probe_response(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && \
    (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP )

#define libipw_is_management(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)

#define libipw_is_control(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)

#define libipw_is_data(fc) \
   ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)

#define libipw_is_assoc_request(fc) \
   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ)

#define libipw_is_reassoc_request(fc) \
   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)

static void ipw_handle_promiscuous_rx(struct ipw_priv *priv,
                      struct ipw_rx_mem_buffer *rxb,
                      struct libipw_rx_stats *stats)
{
    struct net_device *dev = priv->prom_net_dev;
    struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data;
    struct ipw_rx_frame *frame = &pkt->u.frame;
    struct ipw_rt_hdr *ipw_rt;

    /* First cache any information we need before we overwrite
     * the information provided in the skb from the hardware */
    struct ieee80211_hdr *hdr;
    u16 channel = frame->received_channel;
    u8 phy_flags = frame->antennaAndPhy;
    s8 signal = frame->rssi_dbm - IPW_RSSI_TO_DBM;
    s8 noise = (s8) le16_to_cpu(frame->noise);
    u8 rate = frame->rate;
    unsigned short len = le16_to_cpu(pkt->u.frame.length);
    struct sk_buff *skb;
    int hdr_only = 0;
    u16 filter = priv->prom_priv->filter;

    /* If the filter is set to not include Rx frames then return */
    if (filter & IPW_PROM_NO_RX)
        return;

    /* We received data from the HW, so stop the watchdog */
    dev->trans_start = jiffies;

    if (unlikely((len + IPW_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
        dev->stats.rx_errors++;
        IPW_DEBUG_DROP("Corruption detected! Oh no!\n");
        return;
    }

    /* We only process data packets if the interface is open */
    if (unlikely(!netif_running(dev))) {
        dev->stats.rx_dropped++;
        IPW_DEBUG_DROP("Dropping packet while interface is not up.\n");
        return;
    }

    /* Libpcap 0.9.3+ can handle variable length radiotap, so we'll use
     * that now */
    if (len > IPW_RX_BUF_SIZE - sizeof(struct ipw_rt_hdr)) {
        /* FIXME: Should alloc bigger skb instead */
        dev->stats.rx_dropped++;
        IPW_DEBUG_DROP("Dropping too large packet in monitor\n");
        return;
    }

    hdr = (void *)rxb->skb->data + IPW_RX_FRAME_SIZE;
    if (libipw_is_management(le16_to_cpu(hdr->frame_control))) {
        if (filter & IPW_PROM_NO_MGMT)
            return;
        if (filter & IPW_PROM_MGMT_HEADER_ONLY)
            hdr_only = 1;
    } else if (libipw_is_control(le16_to_cpu(hdr->frame_control))) {
        if (filter & IPW_PROM_NO_CTL)
            return;
        if (filter & IPW_PROM_CTL_HEADER_ONLY)
            hdr_only = 1;
    } else if (libipw_is_data(le16_to_cpu(hdr->frame_control))) {
        if (filter & IPW_PROM_NO_DATA)
            return;
        if (filter & IPW_PROM_DATA_HEADER_ONLY)
            hdr_only = 1;
    }

    /* Copy the SKB since this is for the promiscuous side */
    skb = skb_copy(rxb->skb, GFP_ATOMIC);
    if (skb == NULL) {
        IPW_ERROR("skb_clone failed for promiscuous copy.\n");
        return;
    }

    /* copy the frame data to write after where the radiotap header goes */
    ipw_rt = (void *)skb->data;

    if (hdr_only)
        len = libipw_get_hdrlen(le16_to_cpu(hdr->frame_control));

    memcpy(ipw_rt->payload, hdr, len);

    ipw_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
    ipw_rt->rt_hdr.it_pad = 0;  /* always good to zero */
    ipw_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*ipw_rt));   /* total header+data */

    /* Set the size of the skb to the size of the frame */
    skb_put(skb, sizeof(*ipw_rt) + len);

    /* Big bitfield of all the fields we provide in radiotap */
    ipw_rt->rt_hdr.it_present = cpu_to_le32(
         (1 << IEEE80211_RADIOTAP_TSFT) |
         (1 << IEEE80211_RADIOTAP_FLAGS) |
         (1 << IEEE80211_RADIOTAP_RATE) |
         (1 << IEEE80211_RADIOTAP_CHANNEL) |
         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
         (1 << IEEE80211_RADIOTAP_ANTENNA));

    /* Zero the flags, we'll add to them as we go */
    ipw_rt->rt_flags = 0;
    ipw_rt->rt_tsf = (u64)(frame->parent_tsf[3] << 24 |
                   frame->parent_tsf[2] << 16 |
                   frame->parent_tsf[1] << 8  |
                   frame->parent_tsf[0]);

    /* Convert to DBM */
    ipw_rt->rt_dbmsignal = signal;
    ipw_rt->rt_dbmnoise = noise;

    /* Convert the channel data and set the flags */
    ipw_rt->rt_channel = cpu_to_le16(ieee80211chan2mhz(channel));
    if (channel > 14) { /* 802.11a */
        ipw_rt->rt_chbitmask =
            cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
    } else if (phy_flags & (1 << 5)) {  /* 802.11b */
        ipw_rt->rt_chbitmask =
            cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
    } else {        /* 802.11g */
        ipw_rt->rt_chbitmask =
            cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ);
    }

    /* set the rate in multiples of 500k/s */
    switch (rate) {
    case IPW_TX_RATE_1MB:
        ipw_rt->rt_rate = 2;
        break;
    case IPW_TX_RATE_2MB:
        ipw_rt->rt_rate = 4;
        break;
    case IPW_TX_RATE_5MB:
        ipw_rt->rt_rate = 10;
        break;
    case IPW_TX_RATE_6MB:
        ipw_rt->rt_rate = 12;
        break;
    case IPW_TX_RATE_9MB:
        ipw_rt->rt_rate = 18;
        break;
    case IPW_TX_RATE_11MB:
        ipw_rt->rt_rate = 22;
        break;
    case IPW_TX_RATE_12MB:
        ipw_rt->rt_rate = 24;
        break;
    case IPW_TX_RATE_18MB:
        ipw_rt->rt_rate = 36;
        break;
    case IPW_TX_RATE_24MB:
        ipw_rt->rt_rate = 48;
        break;
    case IPW_TX_RATE_36MB:
        ipw_rt->rt_rate = 72;
        break;
    case IPW_TX_RATE_48MB:
        ipw_rt->rt_rate = 96;
        break;
    case IPW_TX_RATE_54MB:
        ipw_rt->rt_rate = 108;
        break;
    default:
        ipw_rt->rt_rate = 0;
        break;
    }

    /* antenna number */
    ipw_rt->rt_antenna = (phy_flags & 3);

    /* set the preamble flag if we have it */
    if (phy_flags & (1 << 6))
        ipw_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

    IPW_DEBUG_RX("Rx packet of %d bytes.\n", skb->len);

    if (!libipw_rx(priv->prom_priv->ieee, skb, stats)) {
        dev->stats.rx_errors++;
        dev_kfree_skb_any(skb);
    }
}
#endif

static int is_network_packet(struct ipw_priv *priv,
                    struct libipw_hdr_4addr *header)
{
    /* Filter incoming packets to determine if they are targeted toward
     * this network, discarding packets coming from ourselves */
    switch (priv->ieee->iw_mode) {
    case IW_MODE_ADHOC: /* Header: Dest. | Source    | BSSID */
        /* packets from our adapter are dropped (echo) */
        if (!memcmp(header->addr2, priv->net_dev->dev_addr, ETH_ALEN))
            return 0;

        /* {broad,multi}cast packets to our BSSID go through */
        if (is_multicast_ether_addr(header->addr1))
            return !memcmp(header->addr3, priv->bssid, ETH_ALEN);

        /* packets to our adapter go through */
        return !memcmp(header->addr1, priv->net_dev->dev_addr,
                   ETH_ALEN);

    case IW_MODE_INFRA: /* Header: Dest. | BSSID | Source */
        /* packets from our adapter are dropped (echo) */
        if (!memcmp(header->addr3, priv->net_dev->dev_addr, ETH_ALEN))
            return 0;

        /* {broad,multi}cast packets to our BSS go through */
        if (is_multicast_ether_addr(header->addr1))
            return !memcmp(header->addr2, priv->bssid, ETH_ALEN);

        /* packets to our adapter go through */
        return !memcmp(header->addr1, priv->net_dev->dev_addr,
                   ETH_ALEN);
    }

    return 1;
}

#define IPW_PACKET_RETRY_TIME HZ

static  int is_duplicate_packet(struct ipw_priv *priv,
                      struct libipw_hdr_4addr *header)
{
    u16 sc = le16_to_cpu(header->seq_ctl);
    u16 seq = WLAN_GET_SEQ_SEQ(sc);
    u16 frag = WLAN_GET_SEQ_FRAG(sc);
    u16 *last_seq, *last_frag;
    unsigned long *last_time;

    switch (priv->ieee->iw_mode) {
    case IW_MODE_ADHOC:
        {
            struct list_head *p;
            struct ipw_ibss_seq *entry = NULL;
            u8 *mac = header->addr2;
            int index = mac[5] % IPW_IBSS_MAC_HASH_SIZE;

            __list_for_each(p, &priv->ibss_mac_hash[index]) {
                entry =
                    list_entry(p, struct ipw_ibss_seq, list);
                if (!memcmp(entry->mac, mac, ETH_ALEN))
                    break;
            }
            if (p == &priv->ibss_mac_hash[index]) {
                entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
                if (!entry) {
                    IPW_ERROR
                        ("Cannot malloc new mac entry\n");
                    return 0;
                }
                memcpy(entry->mac, mac, ETH_ALEN);
                entry->seq_num = seq;
                entry->frag_num = frag;
                entry->packet_time = jiffies;
                list_add(&entry->list,
                     &priv->ibss_mac_hash[index]);
                return 0;
            }
            last_seq = &entry->seq_num;
            last_frag = &entry->frag_num;
            last_time = &entry->packet_time;
            break;
        }
    case IW_MODE_INFRA:
        last_seq = &priv->last_seq_num;
        last_frag = &priv->last_frag_num;
        last_time = &priv->last_packet_time;
        break;
    default:
        return 0;
    }
    if ((*last_seq == seq) &&
        time_after(*last_time + IPW_PACKET_RETRY_TIME, jiffies)) {
        if (*last_frag == frag)
            goto drop;
        if (*last_frag + 1 != frag)
            /* out-of-order fragment */
            goto drop;
    } else
        *last_seq = seq;

    *last_frag = frag;
    *last_time = jiffies;
    return 0;

      drop:
    /* Comment this line now since we observed the card receives
     * duplicate packets but the FCTL_RETRY bit is not set in the
     * IBSS mode with fragmentation enabled.
     BUG_ON(!(le16_to_cpu(header->frame_control) & IEEE80211_FCTL_RETRY)); */
    return 1;
}

static void ipw_handle_mgmt_packet(struct ipw_priv *priv,
                   struct ipw_rx_mem_buffer *rxb,
                   struct libipw_rx_stats *stats)
{
    struct sk_buff *skb = rxb->skb;
    struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)skb->data;
    struct libipw_hdr_4addr *header = (struct libipw_hdr_4addr *)
        (skb->data + IPW_RX_FRAME_SIZE);

    libipw_rx_mgt(priv->ieee, header, stats);

    if (priv->ieee->iw_mode == IW_MODE_ADHOC &&
        ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) ==
          IEEE80211_STYPE_PROBE_RESP) ||
         (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) ==
          IEEE80211_STYPE_BEACON))) {
        if (!memcmp(header->addr3, priv->bssid, ETH_ALEN))
            ipw_add_station(priv, header->addr2);
    }

    if (priv->config & CFG_NET_STATS) {
        IPW_DEBUG_HC("sending stat packet\n");

        /* Set the size of the skb to the size of the full
         * ipw header and 802.11 frame */
        skb_put(skb, le16_to_cpu(pkt->u.frame.length) +
            IPW_RX_FRAME_SIZE);

        /* Advance past the ipw packet header to the 802.11 frame */
        skb_pull(skb, IPW_RX_FRAME_SIZE);

        /* Push the libipw_rx_stats before the 802.11 frame */
        memcpy(skb_push(skb, sizeof(*stats)), stats, sizeof(*stats));

        skb->dev = priv->ieee->dev;

        /* Point raw at the libipw_stats */
        skb_reset_mac_header(skb);

        skb->pkt_type = PACKET_OTHERHOST;
        skb->protocol = cpu_to_be16(ETH_P_80211_STATS);
        memset(skb->cb, 0, sizeof(rxb->skb->cb));
        netif_rx(skb);
        rxb->skb = NULL;
    }
}

/*
 * Main entry function for receiving a packet with 80211 headers.  This
 * should be called when ever the FW has notified us that there is a new
 * skb in the receive queue.
 */
static void ipw_rx(struct ipw_priv *priv)
{
    struct ipw_rx_mem_buffer *rxb;
    struct ipw_rx_packet *pkt;
    struct libipw_hdr_4addr *header;
    u32 r, w, i;
    u8 network_packet;
    u8 fill_rx = 0;

    r = ipw_read32(priv, IPW_RX_READ_INDEX);
    w = ipw_read32(priv, IPW_RX_WRITE_INDEX);
    i = priv->rxq->read;

    if (ipw_rx_queue_space (priv->rxq) > (RX_QUEUE_SIZE / 2))
        fill_rx = 1;

    while (i != r) {
        rxb = priv->rxq->queue[i];
        if (unlikely(rxb == NULL)) {
            printk(KERN_CRIT "Queue not allocated!\n");
            break;
        }
        priv->rxq->queue[i] = NULL;

        pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
                        IPW_RX_BUF_SIZE,
                        PCI_DMA_FROMDEVICE);

        pkt = (struct ipw_rx_packet *)rxb->skb->data;
        IPW_DEBUG_RX("Packet: type=%02X seq=%02X bits=%02X\n",
                 pkt->header.message_type,
                 pkt->header.rx_seq_num, pkt->header.control_bits);

        switch (pkt->header.message_type) {
        case RX_FRAME_TYPE: /* 802.11 frame */  {
                struct libipw_rx_stats stats = {
                    .rssi = pkt->u.frame.rssi_dbm -
                        IPW_RSSI_TO_DBM,
                    .signal =
                        pkt->u.frame.rssi_dbm -
                        IPW_RSSI_TO_DBM + 0x100,
                    .noise =
                        le16_to_cpu(pkt->u.frame.noise),
                    .rate = pkt->u.frame.rate,
                    .mac_time = jiffies,
                    .received_channel =
                        pkt->u.frame.received_channel,
                    .freq =
                        (pkt->u.frame.
                         control & (1 << 0)) ?
                        LIBIPW_24GHZ_BAND :
                        LIBIPW_52GHZ_BAND,
                    .len = le16_to_cpu(pkt->u.frame.length),
                };

                if (stats.rssi != 0)
                    stats.mask |= LIBIPW_STATMASK_RSSI;
                if (stats.signal != 0)
                    stats.mask |= LIBIPW_STATMASK_SIGNAL;
                if (stats.noise != 0)
                    stats.mask |= LIBIPW_STATMASK_NOISE;
                if (stats.rate != 0)
                    stats.mask |= LIBIPW_STATMASK_RATE;

                priv->rx_packets++;

#ifdef CONFIG_IPW2200_PROMISCUOUS
    if (priv->prom_net_dev && netif_running(priv->prom_net_dev))
        ipw_handle_promiscuous_rx(priv, rxb, &stats);
#endif

#ifdef CONFIG_IPW2200_MONITOR
                if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
#ifdef CONFIG_IPW2200_RADIOTAP

                ipw_handle_data_packet_monitor(priv,
                           rxb,
                           &stats);
#else
        ipw_handle_data_packet(priv, rxb,
                       &stats);
#endif
                    break;
                }
#endif

                header =
                    (struct libipw_hdr_4addr *)(rxb->skb->
                                   data +
                                   IPW_RX_FRAME_SIZE);
                /* TODO: Check Ad-Hoc dest/source and make sure
                 * that we are actually parsing these packets
                 * correctly -- we should probably use the
                 * frame control of the packet and disregard
                 * the current iw_mode */

                network_packet =
                    is_network_packet(priv, header);
                if (network_packet && priv->assoc_network) {
                    priv->assoc_network->stats.rssi =
                        stats.rssi;
                    priv->exp_avg_rssi =
                        exponential_average(priv->exp_avg_rssi,
                        stats.rssi, DEPTH_RSSI);
                }

                IPW_DEBUG_RX("Frame: len=%u\n",
                         le16_to_cpu(pkt->u.frame.length));

                if (le16_to_cpu(pkt->u.frame.length) <
                    libipw_get_hdrlen(le16_to_cpu(
                            header->frame_ctl))) {
                    IPW_DEBUG_DROP
                        ("Received packet is too small. "
                         "Dropping.\n");
                    priv->net_dev->stats.rx_errors++;
                    priv->wstats.discard.misc++;
                    break;
                }

                switch (WLAN_FC_GET_TYPE
                    (le16_to_cpu(header->frame_ctl))) {

                case IEEE80211_FTYPE_MGMT:
                    ipw_handle_mgmt_packet(priv, rxb,
                                   &stats);
                    break;

                case IEEE80211_FTYPE_CTL:
                    break;

                case IEEE80211_FTYPE_DATA:
                    if (unlikely(!network_packet ||
                             is_duplicate_packet(priv,
                                     header)))
                    {
                        IPW_DEBUG_DROP("Dropping: "
                                   "%pM, "
                                   "%pM, "
                                   "%pM\n",
                                   header->addr1,
                                   header->addr2,
                                   header->addr3);
                        break;
                    }

                    ipw_handle_data_packet(priv, rxb,
                                   &stats);

                    break;
                }
                break;
            }

        case RX_HOST_NOTIFICATION_TYPE:{
                IPW_DEBUG_RX
                    ("Notification: subtype=%02X flags=%02X size=%d\n",
                     pkt->u.notification.subtype,
                     pkt->u.notification.flags,
                     le16_to_cpu(pkt->u.notification.size));
                ipw_rx_notification(priv, &pkt->u.notification);
                break;
            }

        default:
            IPW_DEBUG_RX("Bad Rx packet of type %d\n",
                     pkt->header.message_type);
            break;
        }

        /* For now we just don't re-use anything.  We can tweak this
         * later to try and re-use notification packets and SKBs that
         * fail to Rx correctly */
        if (rxb->skb != NULL) {
            dev_kfree_skb_any(rxb->skb);
            rxb->skb = NULL;
        }

        pci_unmap_single(priv->pci_dev, rxb->dma_addr,
                 IPW_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
        list_add_tail(&rxb->list, &priv->rxq->rx_used);

        i = (i + 1) % RX_QUEUE_SIZE;

        /* If there are a lot of unsued frames, restock the Rx queue
         * so the ucode won't assert */
        if (fill_rx) {
            priv->rxq->read = i;
            ipw_rx_queue_replenish(priv);
        }
    }

    /* Backtrack one entry */
    priv->rxq->read = i;
    ipw_rx_queue_restock(priv);
}

#define DEFAULT_RTS_THRESHOLD     2304U
#define MIN_RTS_THRESHOLD         1U
#define MAX_RTS_THRESHOLD         2304U
#define DEFAULT_BEACON_INTERVAL   100U
#define DEFAULT_SHORT_RETRY_LIMIT 7U
#define DEFAULT_LONG_RETRY_LIMIT  4U

static int ipw_sw_reset(struct ipw_priv *priv, int option)
{
    int band, modulation;
    int old_mode = priv->ieee->iw_mode;

    /* Initialize module parameter values here */
    priv->config = 0;

    /* We default to disabling the LED code as right now it causes
     * too many systems to lock up... */
    if (!led_support)
        priv->config |= CFG_NO_LED;

    if (associate)
        priv->config |= CFG_ASSOCIATE;
    else
        IPW_DEBUG_INFO("Auto associate disabled.\n");

    if (auto_create)
        priv->config |= CFG_ADHOC_CREATE;
    else
        IPW_DEBUG_INFO("Auto adhoc creation disabled.\n");

    priv->config &= ~CFG_STATIC_ESSID;
    priv->essid_len = 0;
    memset(priv->essid, 0, IW_ESSID_MAX_SIZE);

    if (disable && option) {
        priv->status |= STATUS_RF_KILL_SW;
        IPW_DEBUG_INFO("Radio disabled.\n");
    }

    if (default_channel != 0) {
        priv->config |= CFG_STATIC_CHANNEL;
        priv->channel = default_channel;
        IPW_DEBUG_INFO("Bind to static channel %d\n", default_channel);
        /* TODO: Validate that provided channel is in range */
    }
#ifdef CONFIG_IPW2200_QOS
    ipw_qos_init(priv, qos_enable, qos_burst_enable,
             burst_duration_CCK, burst_duration_OFDM);
#endif              /* CONFIG_IPW2200_QOS */

    switch (network_mode) {
    case 1:
        priv->ieee->iw_mode = IW_MODE_ADHOC;
        priv->net_dev->type = ARPHRD_ETHER;

        break;
#ifdef CONFIG_IPW2200_MONITOR
    case 2:
        priv->ieee->iw_mode = IW_MODE_MONITOR;
#ifdef CONFIG_IPW2200_RADIOTAP
        priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
#else
        priv->net_dev->type = ARPHRD_IEEE80211;
#endif
        break;
#endif
    default:
    case 0:
        priv->net_dev->type = ARPHRD_ETHER;
        priv->ieee->iw_mode = IW_MODE_INFRA;
        break;
    }

    if (hwcrypto) {
        priv->ieee->host_encrypt = 0;
        priv->ieee->host_encrypt_msdu = 0;
        priv->ieee->host_decrypt = 0;
        priv->ieee->host_mc_decrypt = 0;
    }
    IPW_DEBUG_INFO("Hardware crypto [%s]\n", hwcrypto ? "on" : "off");

    /* IPW2200/2915 is abled to do hardware fragmentation. */
    priv->ieee->host_open_frag = 0;

    if ((priv->pci_dev->device == 0x4223) ||
        (priv->pci_dev->device == 0x4224)) {
        if (option == 1)
            printk(KERN_INFO DRV_NAME
                   ": Detected Intel PRO/Wireless 2915ABG Network "
                   "Connection\n");
        priv->ieee->abg_true = 1;
        band = LIBIPW_52GHZ_BAND | LIBIPW_24GHZ_BAND;
        modulation = LIBIPW_OFDM_MODULATION |
            LIBIPW_CCK_MODULATION;
        priv->adapter = IPW_2915ABG;
        priv->ieee->mode = IEEE_A | IEEE_G | IEEE_B;
    } else {
        if (option == 1)
            printk(KERN_INFO DRV_NAME
                   ": Detected Intel PRO/Wireless 2200BG Network "
                   "Connection\n");

        priv->ieee->abg_true = 0;
        band = LIBIPW_24GHZ_BAND;
        modulation = LIBIPW_OFDM_MODULATION |
            LIBIPW_CCK_MODULATION;
        priv->adapter = IPW_2200BG;
        priv->ieee->mode = IEEE_G | IEEE_B;
    }

    priv->ieee->freq_band = band;
    priv->ieee->modulation = modulation;

    priv->rates_mask = LIBIPW_DEFAULT_RATES_MASK;

    priv->disassociate_threshold = IPW_MB_DISASSOCIATE_THRESHOLD_DEFAULT;
    priv->roaming_threshold = IPW_MB_ROAMING_THRESHOLD_DEFAULT;

    priv->rts_threshold = DEFAULT_RTS_THRESHOLD;
    priv->short_retry_limit = DEFAULT_SHORT_RETRY_LIMIT;
    priv->long_retry_limit = DEFAULT_LONG_RETRY_LIMIT;

    /* If power management is turned on, default to AC mode */
    priv->power_mode = IPW_POWER_AC;
    priv->tx_power = IPW_TX_POWER_DEFAULT;

    return old_mode == priv->ieee->iw_mode;
}

/*
 * This file defines the Wireless Extension handlers.  It does not
 * define any methods of hardware manipulation and relies on the
 * functions defined in ipw_main to provide the HW interaction.
 *
 * The exception to this is the use of the ipw_get_ordinal()
 * function used to poll the hardware vs. making unnecessary calls.
 *
 */

static int ipw_set_channel(struct ipw_priv *priv, u8 channel)
{
    if (channel == 0) {
        IPW_DEBUG_INFO("Setting channel to ANY (0)\n");
        priv->config &= ~CFG_STATIC_CHANNEL;
        IPW_DEBUG_ASSOC("Attempting to associate with new "
                "parameters.\n");
        ipw_associate(priv);
        return 0;
    }

    priv->config |= CFG_STATIC_CHANNEL;

    if (priv->channel == channel) {
        IPW_DEBUG_INFO("Request to set channel to current value (%d)\n",
                   channel);
        return 0;
    }

    IPW_DEBUG_INFO("Setting channel to %i\n", (int)channel);
    priv->channel = channel;

#ifdef CONFIG_IPW2200_MONITOR
    if (priv->ieee->iw_mode == IW_MODE_MONITOR) {
        int i;
        if (priv->status & STATUS_SCANNING) {
            IPW_DEBUG_SCAN("Scan abort triggered due to "
                       "channel change.\n");
            ipw_abort_scan(priv);
        }

        for (i = 1000; i && (priv->status & STATUS_SCANNING); i--)
            udelay(10);

        if (priv->status & STATUS_SCANNING)
            IPW_DEBUG_SCAN("Still scanning...\n");
        else
            IPW_DEBUG_SCAN("Took %dms to abort current scan\n",
                       1000 - i);

        return 0;
    }
#endif              /* CONFIG_IPW2200_MONITOR */

    /* Network configuration changed -- force [re]association */
    IPW_DEBUG_ASSOC("[re]association triggered due to channel change.\n");
    if (!ipw_disassociate(priv))
        ipw_associate(priv);

    return 0;
}

static int ipw_wx_set_freq(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
    struct iw_freq *fwrq = &wrqu->freq;
    int ret = 0, i;
    u8 channel, flags;
    int band;

    if (fwrq->m == 0) {
        IPW_DEBUG_WX("SET Freq/Channel -> any\n");
        mutex_lock(&priv->mutex);
        ret = ipw_set_channel(priv, 0);
        mutex_unlock(&priv->mutex);
        return ret;
    }
    /* if setting by freq convert to channel */
    if (fwrq->e == 1) {
        channel = libipw_freq_to_channel(priv->ieee, fwrq->m);
        if (channel == 0)
            return -EINVAL;
    } else
        channel = fwrq->m;

    if (!(band = libipw_is_valid_channel(priv->ieee, channel)))
        return -EINVAL;

    if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
        i = libipw_channel_to_index(priv->ieee, channel);
        if (i == -1)
            return -EINVAL;

        flags = (band == LIBIPW_24GHZ_BAND) ?
            geo->bg[i].flags : geo->a[i].flags;
        if (flags & LIBIPW_CH_PASSIVE_ONLY) {
            IPW_DEBUG_WX("Invalid Ad-Hoc channel for 802.11a\n");
            return -EINVAL;
        }
    }

    IPW_DEBUG_WX("SET Freq/Channel -> %d\n", fwrq->m);
    mutex_lock(&priv->mutex);
    ret = ipw_set_channel(priv, channel);
    mutex_unlock(&priv->mutex);
    return ret;
}

static int ipw_wx_get_freq(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);

    wrqu->freq.e = 0;

    /* If we are associated, trying to associate, or have a statically
     * configured CHANNEL then return that; otherwise return ANY */
    mutex_lock(&priv->mutex);
    if (priv->config & CFG_STATIC_CHANNEL ||
        priv->status & (STATUS_ASSOCIATING | STATUS_ASSOCIATED)) {
        int i;

        i = libipw_channel_to_index(priv->ieee, priv->channel);
        BUG_ON(i == -1);
        wrqu->freq.e = 1;

        switch (libipw_is_valid_channel(priv->ieee, priv->channel)) {
        case LIBIPW_52GHZ_BAND:
            wrqu->freq.m = priv->ieee->geo.a[i].freq * 100000;
            break;

        case LIBIPW_24GHZ_BAND:
            wrqu->freq.m = priv->ieee->geo.bg[i].freq * 100000;
            break;

        default:
            BUG();
        }
    } else
        wrqu->freq.m = 0;

    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("GET Freq/Channel -> %d\n", priv->channel);
    return 0;
}

static int ipw_wx_set_mode(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int err = 0;

    IPW_DEBUG_WX("Set MODE: %d\n", wrqu->mode);

    switch (wrqu->mode) {
#ifdef CONFIG_IPW2200_MONITOR
    case IW_MODE_MONITOR:
#endif
    case IW_MODE_ADHOC:
    case IW_MODE_INFRA:
        break;
    case IW_MODE_AUTO:
        wrqu->mode = IW_MODE_INFRA;
        break;
    default:
        return -EINVAL;
    }
    if (wrqu->mode == priv->ieee->iw_mode)
        return 0;

    mutex_lock(&priv->mutex);

    ipw_sw_reset(priv, 0);

#ifdef CONFIG_IPW2200_MONITOR
    if (priv->ieee->iw_mode == IW_MODE_MONITOR)
        priv->net_dev->type = ARPHRD_ETHER;

    if (wrqu->mode == IW_MODE_MONITOR)
#ifdef CONFIG_IPW2200_RADIOTAP
        priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
#else
        priv->net_dev->type = ARPHRD_IEEE80211;
#endif
#endif              /* CONFIG_IPW2200_MONITOR */

    /* Free the existing firmware and reset the fw_loaded
     * flag so ipw_load() will bring in the new firmware */
    free_firmware();

    priv->ieee->iw_mode = wrqu->mode;

    schedule_work(&priv->adapter_restart);
    mutex_unlock(&priv->mutex);
    return err;
}

static int ipw_wx_get_mode(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    wrqu->mode = priv->ieee->iw_mode;
    IPW_DEBUG_WX("Get MODE -> %d\n", wrqu->mode);
    mutex_unlock(&priv->mutex);
    return 0;
}

/* Values are in microsecond */
static const s32 timeout_duration[] = {
    350000,
    250000,
    75000,
    37000,
    25000,
};

static const s32 period_duration[] = {
    400000,
    700000,
    1000000,
    1000000,
    1000000
};

static int ipw_wx_get_range(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct iw_range *range = (struct iw_range *)extra;
    const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
    int i = 0, j;

    wrqu->data.length = sizeof(*range);
    memset(range, 0, sizeof(*range));

    /* 54Mbs == ~27 Mb/s real (802.11g) */
    range->throughput = 27 * 1000 * 1000;

    range->max_qual.qual = 100;
    /* TODO: Find real max RSSI and stick here */
    range->max_qual.level = 0;
    range->max_qual.noise = 0;
    range->max_qual.updated = 7;    /* Updated all three */

    range->avg_qual.qual = 70;
    /* TODO: Find real 'good' to 'bad' threshold value for RSSI */
    range->avg_qual.level = 0;  /* FIXME to real average level */
    range->avg_qual.noise = 0;
    range->avg_qual.updated = 7;    /* Updated all three */
    mutex_lock(&priv->mutex);
    range->num_bitrates = min(priv->rates.num_rates, (u8) IW_MAX_BITRATES);

    for (i = 0; i < range->num_bitrates; i++)
        range->bitrate[i] = (priv->rates.supported_rates[i] & 0x7F) *
            500000;

    range->max_rts = DEFAULT_RTS_THRESHOLD;
    range->min_frag = MIN_FRAG_THRESHOLD;
    range->max_frag = MAX_FRAG_THRESHOLD;

    range->encoding_size[0] = 5;
    range->encoding_size[1] = 13;
    range->num_encoding_sizes = 2;
    range->max_encoding_tokens = WEP_KEYS;

    /* Set the Wireless Extension versions */
    range->we_version_compiled = WIRELESS_EXT;
    range->we_version_source = 18;

    i = 0;
    if (priv->ieee->mode & (IEEE_B | IEEE_G)) {
        for (j = 0; j < geo->bg_channels && i < IW_MAX_FREQUENCIES; j++) {
            if ((priv->ieee->iw_mode == IW_MODE_ADHOC) &&
                (geo->bg[j].flags & LIBIPW_CH_PASSIVE_ONLY))
                continue;

            range->freq[i].i = geo->bg[j].channel;
            range->freq[i].m = geo->bg[j].freq * 100000;
            range->freq[i].e = 1;
            i++;
        }
    }

    if (priv->ieee->mode & IEEE_A) {
        for (j = 0; j < geo->a_channels && i < IW_MAX_FREQUENCIES; j++) {
            if ((priv->ieee->iw_mode == IW_MODE_ADHOC) &&
                (geo->a[j].flags & LIBIPW_CH_PASSIVE_ONLY))
                continue;

            range->freq[i].i = geo->a[j].channel;
            range->freq[i].m = geo->a[j].freq * 100000;
            range->freq[i].e = 1;
            i++;
        }
    }

    range->num_channels = i;
    range->num_frequency = i;

    mutex_unlock(&priv->mutex);

    /* Event capability (kernel + driver) */
    range->event_capa[0] = (IW_EVENT_CAPA_K_0 |
                IW_EVENT_CAPA_MASK(SIOCGIWTHRSPY) |
                IW_EVENT_CAPA_MASK(SIOCGIWAP) |
                IW_EVENT_CAPA_MASK(SIOCGIWSCAN));
    range->event_capa[1] = IW_EVENT_CAPA_K_1;

    range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
        IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;

    range->scan_capa = IW_SCAN_CAPA_ESSID | IW_SCAN_CAPA_TYPE;

    IPW_DEBUG_WX("GET Range\n");
    return 0;
}

static int ipw_wx_set_wap(struct net_device *dev,
              struct iw_request_info *info,
              union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);

    if (wrqu->ap_addr.sa_family != ARPHRD_ETHER)
        return -EINVAL;
    mutex_lock(&priv->mutex);
    if (is_broadcast_ether_addr(wrqu->ap_addr.sa_data) ||
        is_zero_ether_addr(wrqu->ap_addr.sa_data)) {
        /* we disable mandatory BSSID association */
        IPW_DEBUG_WX("Setting AP BSSID to ANY\n");
        priv->config &= ~CFG_STATIC_BSSID;
        IPW_DEBUG_ASSOC("Attempting to associate with new "
                "parameters.\n");
        ipw_associate(priv);
        mutex_unlock(&priv->mutex);
        return 0;
    }

    priv->config |= CFG_STATIC_BSSID;
    if (!memcmp(priv->bssid, wrqu->ap_addr.sa_data, ETH_ALEN)) {
        IPW_DEBUG_WX("BSSID set to current BSSID.\n");
        mutex_unlock(&priv->mutex);
        return 0;
    }

    IPW_DEBUG_WX("Setting mandatory BSSID to %pM\n",
             wrqu->ap_addr.sa_data);

    memcpy(priv->bssid, wrqu->ap_addr.sa_data, ETH_ALEN);

    /* Network configuration changed -- force [re]association */
    IPW_DEBUG_ASSOC("[re]association triggered due to BSSID change.\n");
    if (!ipw_disassociate(priv))
        ipw_associate(priv);

    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_get_wap(struct net_device *dev,
              struct iw_request_info *info,
              union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);

    /* If we are associated, trying to associate, or have a statically
     * configured BSSID then return that; otherwise return ANY */
    mutex_lock(&priv->mutex);
    if (priv->config & CFG_STATIC_BSSID ||
        priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
        wrqu->ap_addr.sa_family = ARPHRD_ETHER;
        memcpy(wrqu->ap_addr.sa_data, priv->bssid, ETH_ALEN);
    } else
        memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);

    IPW_DEBUG_WX("Getting WAP BSSID: %pM\n",
             wrqu->ap_addr.sa_data);
    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_set_essid(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
        int length;
    DECLARE_SSID_BUF(ssid);

        mutex_lock(&priv->mutex);

        if (!wrqu->essid.flags)
        {
                IPW_DEBUG_WX("Setting ESSID to ANY\n");
                ipw_disassociate(priv);
                priv->config &= ~CFG_STATIC_ESSID;
                ipw_associate(priv);
                mutex_unlock(&priv->mutex);
                return 0;
        }

    length = min((int)wrqu->essid.length, IW_ESSID_MAX_SIZE);

    priv->config |= CFG_STATIC_ESSID;

    if (priv->essid_len == length && !memcmp(priv->essid, extra, length)
        && (priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING))) {
        IPW_DEBUG_WX("ESSID set to current ESSID.\n");
        mutex_unlock(&priv->mutex);
        return 0;
    }

    IPW_DEBUG_WX("Setting ESSID: '%s' (%d)\n",
             print_ssid(ssid, extra, length), length);

    priv->essid_len = length;
    memcpy(priv->essid, extra, priv->essid_len);

    /* Network configuration changed -- force [re]association */
    IPW_DEBUG_ASSOC("[re]association triggered due to ESSID change.\n");
    if (!ipw_disassociate(priv))
        ipw_associate(priv);

    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_get_essid(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    DECLARE_SSID_BUF(ssid);

    /* If we are associated, trying to associate, or have a statically
     * configured ESSID then return that; otherwise return ANY */
    mutex_lock(&priv->mutex);
    if (priv->config & CFG_STATIC_ESSID ||
        priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {
        IPW_DEBUG_WX("Getting essid: '%s'\n",
                 print_ssid(ssid, priv->essid, priv->essid_len));
        memcpy(extra, priv->essid, priv->essid_len);
        wrqu->essid.length = priv->essid_len;
        wrqu->essid.flags = 1;  /* active */
    } else {
        IPW_DEBUG_WX("Getting essid: ANY\n");
        wrqu->essid.length = 0;
        wrqu->essid.flags = 0;  /* active */
    }
    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_set_nick(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);

    IPW_DEBUG_WX("Setting nick to '%s'\n", extra);
    if (wrqu->data.length > IW_ESSID_MAX_SIZE)
        return -E2BIG;
    mutex_lock(&priv->mutex);
    wrqu->data.length = min((size_t) wrqu->data.length, sizeof(priv->nick));
    memset(priv->nick, 0, sizeof(priv->nick));
    memcpy(priv->nick, extra, wrqu->data.length);
    IPW_DEBUG_TRACE("<<\n");
    mutex_unlock(&priv->mutex);
    return 0;

}

static int ipw_wx_get_nick(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    IPW_DEBUG_WX("Getting nick\n");
    mutex_lock(&priv->mutex);
    wrqu->data.length = strlen(priv->nick);
    memcpy(extra, priv->nick, wrqu->data.length);
    wrqu->data.flags = 1;   /* active */
    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_set_sens(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int err = 0;

    IPW_DEBUG_WX("Setting roaming threshold to %d\n", wrqu->sens.value);
    IPW_DEBUG_WX("Setting disassociate threshold to %d\n", 3*wrqu->sens.value);
    mutex_lock(&priv->mutex);

    if (wrqu->sens.fixed == 0)
    {
        priv->roaming_threshold = IPW_MB_ROAMING_THRESHOLD_DEFAULT;
        priv->disassociate_threshold = IPW_MB_DISASSOCIATE_THRESHOLD_DEFAULT;
        goto out;
    }
    if ((wrqu->sens.value > IPW_MB_ROAMING_THRESHOLD_MAX) ||
        (wrqu->sens.value < IPW_MB_ROAMING_THRESHOLD_MIN)) {
        err = -EINVAL;
        goto out;
    }

    priv->roaming_threshold = wrqu->sens.value;
    priv->disassociate_threshold = 3*wrqu->sens.value;
      out:
    mutex_unlock(&priv->mutex);
    return err;
}

static int ipw_wx_get_sens(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    wrqu->sens.fixed = 1;
    wrqu->sens.value = priv->roaming_threshold;
    mutex_unlock(&priv->mutex);

    IPW_DEBUG_WX("GET roaming threshold -> %s %d\n",
             wrqu->power.disabled ? "OFF" : "ON", wrqu->power.value);

    return 0;
}

static int ipw_wx_set_rate(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    /* TODO: We should use semaphores or locks for access to priv */
    struct ipw_priv *priv = libipw_priv(dev);
    u32 target_rate = wrqu->bitrate.value;
    u32 fixed, mask;

    /* value = -1, fixed = 0 means auto only, so we should use all rates offered by AP */
    /* value = X, fixed = 1 means only rate X */
    /* value = X, fixed = 0 means all rates lower equal X */

    if (target_rate == -1) {
        fixed = 0;
        mask = LIBIPW_DEFAULT_RATES_MASK;
        /* Now we should reassociate */
        goto apply;
    }

    mask = 0;
    fixed = wrqu->bitrate.fixed;

    if (target_rate == 1000000 || !fixed)
        mask |= LIBIPW_CCK_RATE_1MB_MASK;
    if (target_rate == 1000000)
        goto apply;

    if (target_rate == 2000000 || !fixed)
        mask |= LIBIPW_CCK_RATE_2MB_MASK;
    if (target_rate == 2000000)
        goto apply;

    if (target_rate == 5500000 || !fixed)
        mask |= LIBIPW_CCK_RATE_5MB_MASK;
    if (target_rate == 5500000)
        goto apply;

    if (target_rate == 6000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_6MB_MASK;
    if (target_rate == 6000000)
        goto apply;

    if (target_rate == 9000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_9MB_MASK;
    if (target_rate == 9000000)
        goto apply;

    if (target_rate == 11000000 || !fixed)
        mask |= LIBIPW_CCK_RATE_11MB_MASK;
    if (target_rate == 11000000)
        goto apply;

    if (target_rate == 12000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_12MB_MASK;
    if (target_rate == 12000000)
        goto apply;

    if (target_rate == 18000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_18MB_MASK;
    if (target_rate == 18000000)
        goto apply;

    if (target_rate == 24000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_24MB_MASK;
    if (target_rate == 24000000)
        goto apply;

    if (target_rate == 36000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_36MB_MASK;
    if (target_rate == 36000000)
        goto apply;

    if (target_rate == 48000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_48MB_MASK;
    if (target_rate == 48000000)
        goto apply;

    if (target_rate == 54000000 || !fixed)
        mask |= LIBIPW_OFDM_RATE_54MB_MASK;
    if (target_rate == 54000000)
        goto apply;

    IPW_DEBUG_WX("invalid rate specified, returning error\n");
    return -EINVAL;

      apply:
    IPW_DEBUG_WX("Setting rate mask to 0x%08X [%s]\n",
             mask, fixed ? "fixed" : "sub-rates");
    mutex_lock(&priv->mutex);
    if (mask == LIBIPW_DEFAULT_RATES_MASK) {
        priv->config &= ~CFG_FIXED_RATE;
        ipw_set_fixed_rate(priv, priv->ieee->mode);
    } else
        priv->config |= CFG_FIXED_RATE;

    if (priv->rates_mask == mask) {
        IPW_DEBUG_WX("Mask set to current mask.\n");
        mutex_unlock(&priv->mutex);
        return 0;
    }

    priv->rates_mask = mask;

    /* Network configuration changed -- force [re]association */
    IPW_DEBUG_ASSOC("[re]association triggered due to rates change.\n");
    if (!ipw_disassociate(priv))
        ipw_associate(priv);

    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_get_rate(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    wrqu->bitrate.value = priv->last_rate;
    wrqu->bitrate.fixed = (priv->config & CFG_FIXED_RATE) ? 1 : 0;
    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("GET Rate -> %d\n", wrqu->bitrate.value);
    return 0;
}

static int ipw_wx_set_rts(struct net_device *dev,
              struct iw_request_info *info,
              union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    if (wrqu->rts.disabled || !wrqu->rts.fixed)
        priv->rts_threshold = DEFAULT_RTS_THRESHOLD;
    else {
        if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
            wrqu->rts.value > MAX_RTS_THRESHOLD) {
            mutex_unlock(&priv->mutex);
            return -EINVAL;
        }
        priv->rts_threshold = wrqu->rts.value;
    }

    ipw_send_rts_threshold(priv, priv->rts_threshold);
    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("SET RTS Threshold -> %d\n", priv->rts_threshold);
    return 0;
}

static int ipw_wx_get_rts(struct net_device *dev,
              struct iw_request_info *info,
              union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    wrqu->rts.value = priv->rts_threshold;
    wrqu->rts.fixed = 0;    /* no auto select */
    wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("GET RTS Threshold -> %d\n", wrqu->rts.value);
    return 0;
}

static int ipw_wx_set_txpow(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int err = 0;

    mutex_lock(&priv->mutex);
    if (ipw_radio_kill_sw(priv, wrqu->power.disabled)) {
        err = -EINPROGRESS;
        goto out;
    }

    if (!wrqu->power.fixed)
        wrqu->power.value = IPW_TX_POWER_DEFAULT;

    if (wrqu->power.flags != IW_TXPOW_DBM) {
        err = -EINVAL;
        goto out;
    }

    if ((wrqu->power.value > IPW_TX_POWER_MAX) ||
        (wrqu->power.value < IPW_TX_POWER_MIN)) {
        err = -EINVAL;
        goto out;
    }

    priv->tx_power = wrqu->power.value;
    err = ipw_set_tx_power(priv);
      out:
    mutex_unlock(&priv->mutex);
    return err;
}

static int ipw_wx_get_txpow(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    wrqu->power.value = priv->tx_power;
    wrqu->power.fixed = 1;
    wrqu->power.flags = IW_TXPOW_DBM;
    wrqu->power.disabled = (priv->status & STATUS_RF_KILL_MASK) ? 1 : 0;
    mutex_unlock(&priv->mutex);

    IPW_DEBUG_WX("GET TX Power -> %s %d\n",
             wrqu->power.disabled ? "OFF" : "ON", wrqu->power.value);

    return 0;
}

static int ipw_wx_set_frag(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    if (wrqu->frag.disabled || !wrqu->frag.fixed)
        priv->ieee->fts = DEFAULT_FTS;
    else {
        if (wrqu->frag.value < MIN_FRAG_THRESHOLD ||
            wrqu->frag.value > MAX_FRAG_THRESHOLD) {
            mutex_unlock(&priv->mutex);
            return -EINVAL;
        }

        priv->ieee->fts = wrqu->frag.value & ~0x1;
    }

    ipw_send_frag_threshold(priv, wrqu->frag.value);
    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("SET Frag Threshold -> %d\n", wrqu->frag.value);
    return 0;
}

static int ipw_wx_get_frag(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    wrqu->frag.value = priv->ieee->fts;
    wrqu->frag.fixed = 0;   /* no auto select */
    wrqu->frag.disabled = (wrqu->frag.value == DEFAULT_FTS);
    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("GET Frag Threshold -> %d\n", wrqu->frag.value);

    return 0;
}

static int ipw_wx_set_retry(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);

    if (wrqu->retry.flags & IW_RETRY_LIFETIME || wrqu->retry.disabled)
        return -EINVAL;

    if (!(wrqu->retry.flags & IW_RETRY_LIMIT))
        return 0;

    if (wrqu->retry.value < 0 || wrqu->retry.value >= 255)
        return -EINVAL;

    mutex_lock(&priv->mutex);
    if (wrqu->retry.flags & IW_RETRY_SHORT)
        priv->short_retry_limit = (u8) wrqu->retry.value;
    else if (wrqu->retry.flags & IW_RETRY_LONG)
        priv->long_retry_limit = (u8) wrqu->retry.value;
    else {
        priv->short_retry_limit = (u8) wrqu->retry.value;
        priv->long_retry_limit = (u8) wrqu->retry.value;
    }

    ipw_send_retry_limit(priv, priv->short_retry_limit,
                 priv->long_retry_limit);
    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("SET retry limit -> short:%d long:%d\n",
             priv->short_retry_limit, priv->long_retry_limit);
    return 0;
}

static int ipw_wx_get_retry(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);

    mutex_lock(&priv->mutex);
    wrqu->retry.disabled = 0;

    if ((wrqu->retry.flags & IW_RETRY_TYPE) == IW_RETRY_LIFETIME) {
        mutex_unlock(&priv->mutex);
        return -EINVAL;
    }

    if (wrqu->retry.flags & IW_RETRY_LONG) {
        wrqu->retry.flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
        wrqu->retry.value = priv->long_retry_limit;
    } else if (wrqu->retry.flags & IW_RETRY_SHORT) {
        wrqu->retry.flags = IW_RETRY_LIMIT | IW_RETRY_SHORT;
        wrqu->retry.value = priv->short_retry_limit;
    } else {
        wrqu->retry.flags = IW_RETRY_LIMIT;
        wrqu->retry.value = priv->short_retry_limit;
    }
    mutex_unlock(&priv->mutex);

    IPW_DEBUG_WX("GET retry -> %d\n", wrqu->retry.value);

    return 0;
}

static int ipw_wx_set_scan(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct iw_scan_req *req = (struct iw_scan_req *)extra;
    struct delayed_work *work = NULL;

    mutex_lock(&priv->mutex);

    priv->user_requested_scan = 1;

    if (wrqu->data.length == sizeof(struct iw_scan_req)) {
        if (wrqu->data.flags & IW_SCAN_THIS_ESSID) {
            int len = min((int)req->essid_len,
                          (int)sizeof(priv->direct_scan_ssid));
            memcpy(priv->direct_scan_ssid, req->essid, len);
            priv->direct_scan_ssid_len = len;
            work = &priv->request_direct_scan;
        } else if (req->scan_type == IW_SCAN_TYPE_PASSIVE) {
            work = &priv->request_passive_scan;
        }
    } else {
        /* Normal active broadcast scan */
        work = &priv->request_scan;
    }

    mutex_unlock(&priv->mutex);

    IPW_DEBUG_WX("Start scan\n");

    schedule_delayed_work(work, 0);

    return 0;
}

static int ipw_wx_get_scan(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    return libipw_wx_get_scan(priv->ieee, info, wrqu, extra);
}

static int ipw_wx_set_encode(struct net_device *dev,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *key)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int ret;
    u32 cap = priv->capability;

    mutex_lock(&priv->mutex);
    ret = libipw_wx_set_encode(priv->ieee, info, wrqu, key);

    /* In IBSS mode, we need to notify the firmware to update
     * the beacon info after we changed the capability. */
    if (cap != priv->capability &&
        priv->ieee->iw_mode == IW_MODE_ADHOC &&
        priv->status & STATUS_ASSOCIATED)
        ipw_disassociate(priv);

    mutex_unlock(&priv->mutex);
    return ret;
}

static int ipw_wx_get_encode(struct net_device *dev,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *key)
{
    struct ipw_priv *priv = libipw_priv(dev);
    return libipw_wx_get_encode(priv->ieee, info, wrqu, key);
}

static int ipw_wx_set_power(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int err;
    mutex_lock(&priv->mutex);
    if (wrqu->power.disabled) {
        priv->power_mode = IPW_POWER_LEVEL(priv->power_mode);
        err = ipw_send_power_mode(priv, IPW_POWER_MODE_CAM);
        if (err) {
            IPW_DEBUG_WX("failed setting power mode.\n");
            mutex_unlock(&priv->mutex);
            return err;
        }
        IPW_DEBUG_WX("SET Power Management Mode -> off\n");
        mutex_unlock(&priv->mutex);
        return 0;
    }

    switch (wrqu->power.flags & IW_POWER_MODE) {
    case IW_POWER_ON:   /* If not specified */
    case IW_POWER_MODE: /* If set all mask */
    case IW_POWER_ALL_R:    /* If explicitly state all */
        break;
    default:        /* Otherwise we don't support it */
        IPW_DEBUG_WX("SET PM Mode: %X not supported.\n",
                 wrqu->power.flags);
        mutex_unlock(&priv->mutex);
        return -EOPNOTSUPP;
    }

    /* If the user hasn't specified a power management mode yet, default
     * to BATTERY */
    if (IPW_POWER_LEVEL(priv->power_mode) == IPW_POWER_AC)
        priv->power_mode = IPW_POWER_ENABLED | IPW_POWER_BATTERY;
    else
        priv->power_mode = IPW_POWER_ENABLED | priv->power_mode;

    err = ipw_send_power_mode(priv, IPW_POWER_LEVEL(priv->power_mode));
    if (err) {
        IPW_DEBUG_WX("failed setting power mode.\n");
        mutex_unlock(&priv->mutex);
        return err;
    }

    IPW_DEBUG_WX("SET Power Management Mode -> 0x%02X\n", priv->power_mode);
    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_get_power(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    if (!(priv->power_mode & IPW_POWER_ENABLED))
        wrqu->power.disabled = 1;
    else
        wrqu->power.disabled = 0;

    mutex_unlock(&priv->mutex);
    IPW_DEBUG_WX("GET Power Management Mode -> %02X\n", priv->power_mode);

    return 0;
}

static int ipw_wx_set_powermode(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int mode = *(int *)extra;
    int err;

    mutex_lock(&priv->mutex);
    if ((mode < 1) || (mode > IPW_POWER_LIMIT))
        mode = IPW_POWER_AC;

    if (IPW_POWER_LEVEL(priv->power_mode) != mode) {
        err = ipw_send_power_mode(priv, mode);
        if (err) {
            IPW_DEBUG_WX("failed setting power mode.\n");
            mutex_unlock(&priv->mutex);
            return err;
        }
        priv->power_mode = IPW_POWER_ENABLED | mode;
    }
    mutex_unlock(&priv->mutex);
    return 0;
}

#define MAX_WX_STRING 80
static int ipw_wx_get_powermode(struct net_device *dev,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int level = IPW_POWER_LEVEL(priv->power_mode);
    char *p = extra;

    p += snprintf(p, MAX_WX_STRING, "Power save level: %d ", level);

    switch (level) {
    case IPW_POWER_AC:
        p += snprintf(p, MAX_WX_STRING - (p - extra), "(AC)");
        break;
    case IPW_POWER_BATTERY:
        p += snprintf(p, MAX_WX_STRING - (p - extra), "(BATTERY)");
        break;
    default:
        p += snprintf(p, MAX_WX_STRING - (p - extra),
                  "(Timeout %dms, Period %dms)",
                  timeout_duration[level - 1] / 1000,
                  period_duration[level - 1] / 1000);
    }

    if (!(priv->power_mode & IPW_POWER_ENABLED))
        p += snprintf(p, MAX_WX_STRING - (p - extra), " OFF");

    wrqu->data.length = p - extra + 1;

    return 0;
}

static int ipw_wx_set_wireless_mode(struct net_device *dev,
                    struct iw_request_info *info,
                    union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int mode = *(int *)extra;
    u8 band = 0, modulation = 0;

    if (mode == 0 || mode & ~IEEE_MODE_MASK) {
        IPW_WARNING("Attempt to set invalid wireless mode: %d\n", mode);
        return -EINVAL;
    }
    mutex_lock(&priv->mutex);
    if (priv->adapter == IPW_2915ABG) {
        priv->ieee->abg_true = 1;
        if (mode & IEEE_A) {
            band |= LIBIPW_52GHZ_BAND;
            modulation |= LIBIPW_OFDM_MODULATION;
        } else
            priv->ieee->abg_true = 0;
    } else {
        if (mode & IEEE_A) {
            IPW_WARNING("Attempt to set 2200BG into "
                    "802.11a mode\n");
            mutex_unlock(&priv->mutex);
            return -EINVAL;
        }

        priv->ieee->abg_true = 0;
    }

    if (mode & IEEE_B) {
        band |= LIBIPW_24GHZ_BAND;
        modulation |= LIBIPW_CCK_MODULATION;
    } else
        priv->ieee->abg_true = 0;

    if (mode & IEEE_G) {
        band |= LIBIPW_24GHZ_BAND;
        modulation |= LIBIPW_OFDM_MODULATION;
    } else
        priv->ieee->abg_true = 0;

    priv->ieee->mode = mode;
    priv->ieee->freq_band = band;
    priv->ieee->modulation = modulation;
    init_supported_rates(priv, &priv->rates);

    /* Network configuration changed -- force [re]association */
    IPW_DEBUG_ASSOC("[re]association triggered due to mode change.\n");
    if (!ipw_disassociate(priv)) {
        ipw_send_supported_rates(priv, &priv->rates);
        ipw_associate(priv);
    }

    /* Update the band LEDs */
    ipw_led_band_on(priv);

    IPW_DEBUG_WX("PRIV SET MODE: %c%c%c\n",
             mode & IEEE_A ? 'a' : '.',
             mode & IEEE_B ? 'b' : '.', mode & IEEE_G ? 'g' : '.');
    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_get_wireless_mode(struct net_device *dev,
                    struct iw_request_info *info,
                    union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    switch (priv->ieee->mode) {
    case IEEE_A:
        strncpy(extra, "802.11a (1)", MAX_WX_STRING);
        break;
    case IEEE_B:
        strncpy(extra, "802.11b (2)", MAX_WX_STRING);
        break;
    case IEEE_A | IEEE_B:
        strncpy(extra, "802.11ab (3)", MAX_WX_STRING);
        break;
    case IEEE_G:
        strncpy(extra, "802.11g (4)", MAX_WX_STRING);
        break;
    case IEEE_A | IEEE_G:
        strncpy(extra, "802.11ag (5)", MAX_WX_STRING);
        break;
    case IEEE_B | IEEE_G:
        strncpy(extra, "802.11bg (6)", MAX_WX_STRING);
        break;
    case IEEE_A | IEEE_B | IEEE_G:
        strncpy(extra, "802.11abg (7)", MAX_WX_STRING);
        break;
    default:
        strncpy(extra, "unknown", MAX_WX_STRING);
        break;
    }

    IPW_DEBUG_WX("PRIV GET MODE: %s\n", extra);

    wrqu->data.length = strlen(extra) + 1;
    mutex_unlock(&priv->mutex);

    return 0;
}

static int ipw_wx_set_preamble(struct net_device *dev,
                   struct iw_request_info *info,
                   union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int mode = *(int *)extra;
    mutex_lock(&priv->mutex);
    /* Switching from SHORT -> LONG requires a disassociation */
    if (mode == 1) {
        if (!(priv->config & CFG_PREAMBLE_LONG)) {
            priv->config |= CFG_PREAMBLE_LONG;

            /* Network configuration changed -- force [re]association */
            IPW_DEBUG_ASSOC
                ("[re]association triggered due to preamble change.\n");
            if (!ipw_disassociate(priv))
                ipw_associate(priv);
        }
        goto done;
    }

    if (mode == 0) {
        priv->config &= ~CFG_PREAMBLE_LONG;
        goto done;
    }
    mutex_unlock(&priv->mutex);
    return -EINVAL;

      done:
    mutex_unlock(&priv->mutex);
    return 0;
}

static int ipw_wx_get_preamble(struct net_device *dev,
                   struct iw_request_info *info,
                   union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    mutex_lock(&priv->mutex);
    if (priv->config & CFG_PREAMBLE_LONG)
        snprintf(wrqu->name, IFNAMSIZ, "long (1)");
    else
        snprintf(wrqu->name, IFNAMSIZ, "auto (0)");
    mutex_unlock(&priv->mutex);
    return 0;
}

#ifdef CONFIG_IPW2200_MONITOR
static int ipw_wx_set_monitor(struct net_device *dev,
                  struct iw_request_info *info,
                  union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int *parms = (int *)extra;
    int enable = (parms[0] > 0);
    mutex_lock(&priv->mutex);
    IPW_DEBUG_WX("SET MONITOR: %d %d\n", enable, parms[1]);
    if (enable) {
        if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
#ifdef CONFIG_IPW2200_RADIOTAP
            priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
#else
            priv->net_dev->type = ARPHRD_IEEE80211;
#endif
            schedule_work(&priv->adapter_restart);
        }

        ipw_set_channel(priv, parms[1]);
    } else {
        if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
            mutex_unlock(&priv->mutex);
            return 0;
        }
        priv->net_dev->type = ARPHRD_ETHER;
        schedule_work(&priv->adapter_restart);
    }
    mutex_unlock(&priv->mutex);
    return 0;
}

#endif              /* CONFIG_IPW2200_MONITOR */

static int ipw_wx_reset(struct net_device *dev,
            struct iw_request_info *info,
            union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    IPW_DEBUG_WX("RESET\n");
    schedule_work(&priv->adapter_restart);
    return 0;
}

static int ipw_wx_sw_reset(struct net_device *dev,
               struct iw_request_info *info,
               union iwreq_data *wrqu, char *extra)
{
    struct ipw_priv *priv = libipw_priv(dev);
    union iwreq_data wrqu_sec = {
        .encoding = {
                 .flags = IW_ENCODE_DISABLED,
                 },
    };
    int ret;

    IPW_DEBUG_WX("SW_RESET\n");

    mutex_lock(&priv->mutex);

    ret = ipw_sw_reset(priv, 2);
    if (!ret) {
        free_firmware();
        ipw_adapter_restart(priv);
    }

    /* The SW reset bit might have been toggled on by the 'disable'
     * module parameter, so take appropriate action */
    ipw_radio_kill_sw(priv, priv->status & STATUS_RF_KILL_SW);

    mutex_unlock(&priv->mutex);
    libipw_wx_set_encode(priv->ieee, info, &wrqu_sec, NULL);
    mutex_lock(&priv->mutex);

    if (!(priv->status & STATUS_RF_KILL_MASK)) {
        /* Configuration likely changed -- force [re]association */
        IPW_DEBUG_ASSOC("[re]association triggered due to sw "
                "reset.\n");
        if (!ipw_disassociate(priv))
            ipw_associate(priv);
    }

    mutex_unlock(&priv->mutex);

    return 0;
}

/* Rebase the WE IOCTLs to zero for the handler array */
static iw_handler ipw_wx_handlers[] = {
    IW_HANDLER(SIOCGIWNAME, (iw_handler)cfg80211_wext_giwname),
    IW_HANDLER(SIOCSIWFREQ, ipw_wx_set_freq),
    IW_HANDLER(SIOCGIWFREQ, ipw_wx_get_freq),
    IW_HANDLER(SIOCSIWMODE, ipw_wx_set_mode),
    IW_HANDLER(SIOCGIWMODE, ipw_wx_get_mode),
    IW_HANDLER(SIOCSIWSENS, ipw_wx_set_sens),
    IW_HANDLER(SIOCGIWSENS, ipw_wx_get_sens),
    IW_HANDLER(SIOCGIWRANGE, ipw_wx_get_range),
    IW_HANDLER(SIOCSIWAP, ipw_wx_set_wap),
    IW_HANDLER(SIOCGIWAP, ipw_wx_get_wap),
    IW_HANDLER(SIOCSIWSCAN, ipw_wx_set_scan),
    IW_HANDLER(SIOCGIWSCAN, ipw_wx_get_scan),
    IW_HANDLER(SIOCSIWESSID, ipw_wx_set_essid),
    IW_HANDLER(SIOCGIWESSID, ipw_wx_get_essid),
    IW_HANDLER(SIOCSIWNICKN, ipw_wx_set_nick),
    IW_HANDLER(SIOCGIWNICKN, ipw_wx_get_nick),
    IW_HANDLER(SIOCSIWRATE, ipw_wx_set_rate),
    IW_HANDLER(SIOCGIWRATE, ipw_wx_get_rate),
    IW_HANDLER(SIOCSIWRTS, ipw_wx_set_rts),
    IW_HANDLER(SIOCGIWRTS, ipw_wx_get_rts),
    IW_HANDLER(SIOCSIWFRAG, ipw_wx_set_frag),
    IW_HANDLER(SIOCGIWFRAG, ipw_wx_get_frag),
    IW_HANDLER(SIOCSIWTXPOW, ipw_wx_set_txpow),
    IW_HANDLER(SIOCGIWTXPOW, ipw_wx_get_txpow),
    IW_HANDLER(SIOCSIWRETRY, ipw_wx_set_retry),
    IW_HANDLER(SIOCGIWRETRY, ipw_wx_get_retry),
    IW_HANDLER(SIOCSIWENCODE, ipw_wx_set_encode),
    IW_HANDLER(SIOCGIWENCODE, ipw_wx_get_encode),
    IW_HANDLER(SIOCSIWPOWER, ipw_wx_set_power),
    IW_HANDLER(SIOCGIWPOWER, ipw_wx_get_power),
    IW_HANDLER(SIOCSIWSPY, iw_handler_set_spy),
    IW_HANDLER(SIOCGIWSPY, iw_handler_get_spy),
    IW_HANDLER(SIOCSIWTHRSPY, iw_handler_set_thrspy),
    IW_HANDLER(SIOCGIWTHRSPY, iw_handler_get_thrspy),
    IW_HANDLER(SIOCSIWGENIE, ipw_wx_set_genie),
    IW_HANDLER(SIOCGIWGENIE, ipw_wx_get_genie),
    IW_HANDLER(SIOCSIWMLME, ipw_wx_set_mlme),
    IW_HANDLER(SIOCSIWAUTH, ipw_wx_set_auth),
    IW_HANDLER(SIOCGIWAUTH, ipw_wx_get_auth),
    IW_HANDLER(SIOCSIWENCODEEXT, ipw_wx_set_encodeext),
    IW_HANDLER(SIOCGIWENCODEEXT, ipw_wx_get_encodeext),
};

enum {
    IPW_PRIV_SET_POWER = SIOCIWFIRSTPRIV,
    IPW_PRIV_GET_POWER,
    IPW_PRIV_SET_MODE,
    IPW_PRIV_GET_MODE,
    IPW_PRIV_SET_PREAMBLE,
    IPW_PRIV_GET_PREAMBLE,
    IPW_PRIV_RESET,
    IPW_PRIV_SW_RESET,
#ifdef CONFIG_IPW2200_MONITOR
    IPW_PRIV_SET_MONITOR,
#endif
};

static struct iw_priv_args ipw_priv_args[] = {
    {
     .cmd = IPW_PRIV_SET_POWER,
     .set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
     .name = "set_power"},
    {
     .cmd = IPW_PRIV_GET_POWER,
     .get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | MAX_WX_STRING,
     .name = "get_power"},
    {
     .cmd = IPW_PRIV_SET_MODE,
     .set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
     .name = "set_mode"},
    {
     .cmd = IPW_PRIV_GET_MODE,
     .get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | MAX_WX_STRING,
     .name = "get_mode"},
    {
     .cmd = IPW_PRIV_SET_PREAMBLE,
     .set_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
     .name = "set_preamble"},
    {
     .cmd = IPW_PRIV_GET_PREAMBLE,
     .get_args = IW_PRIV_TYPE_CHAR | IW_PRIV_SIZE_FIXED | IFNAMSIZ,
     .name = "get_preamble"},
    {
     IPW_PRIV_RESET,
     IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 0, 0, "reset"},
    {
     IPW_PRIV_SW_RESET,
     IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 0, 0, "sw_reset"},
#ifdef CONFIG_IPW2200_MONITOR
    {
     IPW_PRIV_SET_MONITOR,
     IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 2, 0, "monitor"},
#endif              /* CONFIG_IPW2200_MONITOR */
};

static iw_handler ipw_priv_handler[] = {
    ipw_wx_set_powermode,
    ipw_wx_get_powermode,
    ipw_wx_set_wireless_mode,
    ipw_wx_get_wireless_mode,
    ipw_wx_set_preamble,
    ipw_wx_get_preamble,
    ipw_wx_reset,
    ipw_wx_sw_reset,
#ifdef CONFIG_IPW2200_MONITOR
    ipw_wx_set_monitor,
#endif
};

static struct iw_handler_def ipw_wx_handler_def = {
    .standard = ipw_wx_handlers,
    .num_standard = ARRAY_SIZE(ipw_wx_handlers),
    .num_private = ARRAY_SIZE(ipw_priv_handler),
    .num_private_args = ARRAY_SIZE(ipw_priv_args),
    .private = ipw_priv_handler,
    .private_args = ipw_priv_args,
    .get_wireless_stats = ipw_get_wireless_stats,
};

/*
 * Get wireless statistics.
 * Called by /proc/net/wireless
 * Also called by SIOCGIWSTATS
 */
static struct iw_statistics *ipw_get_wireless_stats(struct net_device *dev)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct iw_statistics *wstats;

    wstats = &priv->wstats;

    /* if hw is disabled, then ipw_get_ordinal() can't be called.
     * netdev->get_wireless_stats seems to be called before fw is
     * initialized.  STATUS_ASSOCIATED will only be set if the hw is up
     * and associated; if not associcated, the values are all meaningless
     * anyway, so set them all to NULL and INVALID */
    if (!(priv->status & STATUS_ASSOCIATED)) {
        wstats->miss.beacon = 0;
        wstats->discard.retries = 0;
        wstats->qual.qual = 0;
        wstats->qual.level = 0;
        wstats->qual.noise = 0;
        wstats->qual.updated = 7;
        wstats->qual.updated |= IW_QUAL_NOISE_INVALID |
            IW_QUAL_QUAL_INVALID | IW_QUAL_LEVEL_INVALID;
        return wstats;
    }

    wstats->qual.qual = priv->quality;
    wstats->qual.level = priv->exp_avg_rssi;
    wstats->qual.noise = priv->exp_avg_noise;
    wstats->qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
        IW_QUAL_NOISE_UPDATED | IW_QUAL_DBM;

    wstats->miss.beacon = average_value(&priv->average_missed_beacons);
    wstats->discard.retries = priv->last_tx_failures;
    wstats->discard.code = priv->ieee->ieee_stats.rx_discards_undecryptable;

/*  if (ipw_get_ordinal(priv, IPW_ORD_STAT_TX_RETRY, &tx_retry, &len))
    goto fail_get_ordinal;
    wstats->discard.retries += tx_retry; */

    return wstats;
}

/* net device stuff */

static  void init_sys_config(struct ipw_sys_config *sys_config)
{
    memset(sys_config, 0, sizeof(struct ipw_sys_config));
    sys_config->bt_coexistence = 0;
    sys_config->answer_broadcast_ssid_probe = 0;
    sys_config->accept_all_data_frames = 0;
    sys_config->accept_non_directed_frames = 1;
    sys_config->exclude_unicast_unencrypted = 0;
    sys_config->disable_unicast_decryption = 1;
    sys_config->exclude_multicast_unencrypted = 0;
    sys_config->disable_multicast_decryption = 1;
    if (antenna < CFG_SYS_ANTENNA_BOTH || antenna > CFG_SYS_ANTENNA_B)
        antenna = CFG_SYS_ANTENNA_BOTH;
    sys_config->antenna_diversity = antenna;
    sys_config->pass_crc_to_host = 0;   /* TODO: See if 1 gives us FCS */
    sys_config->dot11g_auto_detection = 0;
    sys_config->enable_cts_to_self = 0;
    sys_config->bt_coexist_collision_thr = 0;
    sys_config->pass_noise_stats_to_host = 1;   /* 1 -- fix for 256 */
    sys_config->silence_threshold = 0x1e;
}

static int ipw_net_open(struct net_device *dev)
{
    IPW_DEBUG_INFO("dev->open\n");
    netif_start_queue(dev);
    return 0;
}

static int ipw_net_stop(struct net_device *dev)
{
    IPW_DEBUG_INFO("dev->close\n");
    netif_stop_queue(dev);
    return 0;
}

/*
todo:

modify to send one tfd per fragment instead of using chunking.  otherwise
we need to heavily modify the libipw_skb_to_txb.
*/

static int ipw_tx_skb(struct ipw_priv *priv, struct libipw_txb *txb,
                 int pri)
{
    struct libipw_hdr_3addrqos *hdr = (struct libipw_hdr_3addrqos *)
        txb->fragments[0]->data;
    int i = 0;
    struct tfd_frame *tfd;
#ifdef CONFIG_IPW2200_QOS
    int tx_id = ipw_get_tx_queue_number(priv, pri);
    struct clx2_tx_queue *txq = &priv->txq[tx_id];
#else
    struct clx2_tx_queue *txq = &priv->txq[0];
#endif
    struct clx2_queue *q = &txq->q;
    u8 id, hdr_len, unicast;
    int fc;

    if (!(priv->status & STATUS_ASSOCIATED))
        goto drop;

    hdr_len = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
    switch (priv->ieee->iw_mode) {
    case IW_MODE_ADHOC:
        unicast = !is_multicast_ether_addr(hdr->addr1);
        id = ipw_find_station(priv, hdr->addr1);
        if (id == IPW_INVALID_STATION) {
            id = ipw_add_station(priv, hdr->addr1);
            if (id == IPW_INVALID_STATION) {
                IPW_WARNING("Attempt to send data to "
                        "invalid cell: %pM\n",
                        hdr->addr1);
                goto drop;
            }
        }
        break;

    case IW_MODE_INFRA:
    default:
        unicast = !is_multicast_ether_addr(hdr->addr3);
        id = 0;
        break;
    }

    tfd = &txq->bd[q->first_empty];
    txq->txb[q->first_empty] = txb;
    memset(tfd, 0, sizeof(*tfd));
    tfd->u.data.station_number = id;

    tfd->control_flags.message_type = TX_FRAME_TYPE;
    tfd->control_flags.control_bits = TFD_NEED_IRQ_MASK;

    tfd->u.data.cmd_id = DINO_CMD_TX;
    tfd->u.data.len = cpu_to_le16(txb->payload_size);

    if (priv->assoc_request.ieee_mode == IPW_B_MODE)
        tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_MODE_CCK;
    else
        tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_MODE_OFDM;

    if (priv->assoc_request.preamble_length == DCT_FLAG_SHORT_PREAMBLE)
        tfd->u.data.tx_flags |= DCT_FLAG_SHORT_PREAMBLE;

    fc = le16_to_cpu(hdr->frame_ctl);
    hdr->frame_ctl = cpu_to_le16(fc & ~IEEE80211_FCTL_MOREFRAGS);

    memcpy(&tfd->u.data.tfd.tfd_24.mchdr, hdr, hdr_len);

    if (likely(unicast))
        tfd->u.data.tx_flags |= DCT_FLAG_ACK_REQD;

    if (txb->encrypted && !priv->ieee->host_encrypt) {
        switch (priv->ieee->sec.level) {
        case SEC_LEVEL_3:
            tfd->u.data.tfd.tfd_24.mchdr.frame_ctl |=
                cpu_to_le16(IEEE80211_FCTL_PROTECTED);
            /* XXX: ACK flag must be set for CCMP even if it
             * is a multicast/broadcast packet, because CCMP
             * group communication encrypted by GTK is
             * actually done by the AP. */
            if (!unicast)
                tfd->u.data.tx_flags |= DCT_FLAG_ACK_REQD;

            tfd->u.data.tx_flags &= ~DCT_FLAG_NO_WEP;
            tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_SECURITY_CCM;
            tfd->u.data.key_index = 0;
            tfd->u.data.key_index |= DCT_WEP_INDEX_USE_IMMEDIATE;
            break;
        case SEC_LEVEL_2:
            tfd->u.data.tfd.tfd_24.mchdr.frame_ctl |=
                cpu_to_le16(IEEE80211_FCTL_PROTECTED);
            tfd->u.data.tx_flags &= ~DCT_FLAG_NO_WEP;
            tfd->u.data.tx_flags_ext |= DCT_FLAG_EXT_SECURITY_TKIP;
            tfd->u.data.key_index = DCT_WEP_INDEX_USE_IMMEDIATE;
            break;
        case SEC_LEVEL_1:
            tfd->u.data.tfd.tfd_24.mchdr.frame_ctl |=
                cpu_to_le16(IEEE80211_FCTL_PROTECTED);
            tfd->u.data.key_index = priv->ieee->crypt_info.tx_keyidx;
            if (priv->ieee->sec.key_sizes[priv->ieee->crypt_info.tx_keyidx] <=
                40)
                tfd->u.data.key_index |= DCT_WEP_KEY_64Bit;
            else
                tfd->u.data.key_index |= DCT_WEP_KEY_128Bit;
            break;
        case SEC_LEVEL_0:
            break;
        default:
            printk(KERN_ERR "Unknown security level %d\n",
                   priv->ieee->sec.level);
            break;
        }
    } else
        /* No hardware encryption */
        tfd->u.data.tx_flags |= DCT_FLAG_NO_WEP;

#ifdef CONFIG_IPW2200_QOS
    if (fc & IEEE80211_STYPE_QOS_DATA)
        ipw_qos_set_tx_queue_command(priv, pri, &(tfd->u.data));
#endif              /* CONFIG_IPW2200_QOS */

    /* payload */
    tfd->u.data.num_chunks = cpu_to_le32(min((u8) (NUM_TFD_CHUNKS - 2),
                         txb->nr_frags));
    IPW_DEBUG_FRAG("%i fragments being sent as %i chunks.\n",
               txb->nr_frags, le32_to_cpu(tfd->u.data.num_chunks));
    for (i = 0; i < le32_to_cpu(tfd->u.data.num_chunks); i++) {
        IPW_DEBUG_FRAG("Adding fragment %i of %i (%d bytes).\n",
                   i, le32_to_cpu(tfd->u.data.num_chunks),
                   txb->fragments[i]->len - hdr_len);
        IPW_DEBUG_TX("Dumping TX packet frag %i of %i (%d bytes):\n",
                 i, tfd->u.data.num_chunks,
                 txb->fragments[i]->len - hdr_len);
        printk_buf(IPW_DL_TX, txb->fragments[i]->data + hdr_len,
               txb->fragments[i]->len - hdr_len);

        tfd->u.data.chunk_ptr[i] =
            cpu_to_le32(pci_map_single
                (priv->pci_dev,
                 txb->fragments[i]->data + hdr_len,
                 txb->fragments[i]->len - hdr_len,
                 PCI_DMA_TODEVICE));
        tfd->u.data.chunk_len[i] =
            cpu_to_le16(txb->fragments[i]->len - hdr_len);
    }

    if (i != txb->nr_frags) {
        struct sk_buff *skb;
        u16 remaining_bytes = 0;
        int j;

        for (j = i; j < txb->nr_frags; j++)
            remaining_bytes += txb->fragments[j]->len - hdr_len;

        printk(KERN_INFO "Trying to reallocate for %d bytes\n",
               remaining_bytes);
        skb = alloc_skb(remaining_bytes, GFP_ATOMIC);
        if (skb != NULL) {
            tfd->u.data.chunk_len[i] = cpu_to_le16(remaining_bytes);
            for (j = i; j < txb->nr_frags; j++) {
                int size = txb->fragments[j]->len - hdr_len;

                printk(KERN_INFO "Adding frag %d %d...\n",
                       j, size);
                memcpy(skb_put(skb, size),
                       txb->fragments[j]->data + hdr_len, size);
            }
            dev_kfree_skb_any(txb->fragments[i]);
            txb->fragments[i] = skb;
            tfd->u.data.chunk_ptr[i] =
                cpu_to_le32(pci_map_single
                    (priv->pci_dev, skb->data,
                     remaining_bytes,
                     PCI_DMA_TODEVICE));

            le32_add_cpu(&tfd->u.data.num_chunks, 1);
        }
    }

    /* kick DMA */
    q->first_empty = ipw_queue_inc_wrap(q->first_empty, q->n_bd);
    ipw_write32(priv, q->reg_w, q->first_empty);

    if (ipw_tx_queue_space(q) < q->high_mark)
        netif_stop_queue(priv->net_dev);

    return NETDEV_TX_OK;

      drop:
    IPW_DEBUG_DROP("Silently dropping Tx packet.\n");
    libipw_txb_free(txb);
    return NETDEV_TX_OK;
}

static int ipw_net_is_queue_full(struct net_device *dev, int pri)
{
    struct ipw_priv *priv = libipw_priv(dev);
#ifdef CONFIG_IPW2200_QOS
    int tx_id = ipw_get_tx_queue_number(priv, pri);
    struct clx2_tx_queue *txq = &priv->txq[tx_id];
#else
    struct clx2_tx_queue *txq = &priv->txq[0];
#endif              /* CONFIG_IPW2200_QOS */

    if (ipw_tx_queue_space(&txq->q) < txq->q.high_mark)
        return 1;

    return 0;
}

#ifdef CONFIG_IPW2200_PROMISCUOUS
static void ipw_handle_promiscuous_tx(struct ipw_priv *priv,
                      struct libipw_txb *txb)
{
    struct libipw_rx_stats dummystats;
    struct ieee80211_hdr *hdr;
    u8 n;
    u16 filter = priv->prom_priv->filter;
    int hdr_only = 0;

    if (filter & IPW_PROM_NO_TX)
        return;

    memset(&dummystats, 0, sizeof(dummystats));

    /* Filtering of fragment chains is done against the first fragment */
    hdr = (void *)txb->fragments[0]->data;
    if (libipw_is_management(le16_to_cpu(hdr->frame_control))) {
        if (filter & IPW_PROM_NO_MGMT)
            return;
        if (filter & IPW_PROM_MGMT_HEADER_ONLY)
            hdr_only = 1;
    } else if (libipw_is_control(le16_to_cpu(hdr->frame_control))) {
        if (filter & IPW_PROM_NO_CTL)
            return;
        if (filter & IPW_PROM_CTL_HEADER_ONLY)
            hdr_only = 1;
    } else if (libipw_is_data(le16_to_cpu(hdr->frame_control))) {
        if (filter & IPW_PROM_NO_DATA)
            return;
        if (filter & IPW_PROM_DATA_HEADER_ONLY)
            hdr_only = 1;
    }

    for(n=0; n<txb->nr_frags; ++n) {
        struct sk_buff *src = txb->fragments[n];
        struct sk_buff *dst;
        struct ieee80211_radiotap_header *rt_hdr;
        int len;

        if (hdr_only) {
            hdr = (void *)src->data;
            len = libipw_get_hdrlen(le16_to_cpu(hdr->frame_control));
        } else
            len = src->len;

        dst = alloc_skb(len + sizeof(*rt_hdr) + sizeof(u16)*2, GFP_ATOMIC);
        if (!dst)
            continue;

        rt_hdr = (void *)skb_put(dst, sizeof(*rt_hdr));

        rt_hdr->it_version = PKTHDR_RADIOTAP_VERSION;
        rt_hdr->it_pad = 0;
        rt_hdr->it_present = 0; /* after all, it's just an idea */
        rt_hdr->it_present |=  cpu_to_le32(1 << IEEE80211_RADIOTAP_CHANNEL);

        *(__le16*)skb_put(dst, sizeof(u16)) = cpu_to_le16(
            ieee80211chan2mhz(priv->channel));
        if (priv->channel > 14)     /* 802.11a */
            *(__le16*)skb_put(dst, sizeof(u16)) =
                cpu_to_le16(IEEE80211_CHAN_OFDM |
                         IEEE80211_CHAN_5GHZ);
        else if (priv->ieee->mode == IEEE_B) /* 802.11b */
            *(__le16*)skb_put(dst, sizeof(u16)) =
                cpu_to_le16(IEEE80211_CHAN_CCK |
                         IEEE80211_CHAN_2GHZ);
        else        /* 802.11g */
            *(__le16*)skb_put(dst, sizeof(u16)) =
                cpu_to_le16(IEEE80211_CHAN_OFDM |
                 IEEE80211_CHAN_2GHZ);

        rt_hdr->it_len = cpu_to_le16(dst->len);

        skb_copy_from_linear_data(src, skb_put(dst, len), len);

        if (!libipw_rx(priv->prom_priv->ieee, dst, &dummystats))
            dev_kfree_skb_any(dst);
    }
}
#endif

static netdev_tx_t ipw_net_hard_start_xmit(struct libipw_txb *txb,
                       struct net_device *dev, int pri)
{
    struct ipw_priv *priv = libipw_priv(dev);
    unsigned long flags;
    netdev_tx_t ret;

    IPW_DEBUG_TX("dev->xmit(%d bytes)\n", txb->payload_size);
    spin_lock_irqsave(&priv->lock, flags);

#ifdef CONFIG_IPW2200_PROMISCUOUS
    if (rtap_iface && netif_running(priv->prom_net_dev))
        ipw_handle_promiscuous_tx(priv, txb);
#endif

    ret = ipw_tx_skb(priv, txb, pri);
    if (ret == NETDEV_TX_OK)
        __ipw_led_activity_on(priv);
    spin_unlock_irqrestore(&priv->lock, flags);

    return ret;
}

static void ipw_net_set_multicast_list(struct net_device *dev)
{

}

static int ipw_net_set_mac_address(struct net_device *dev, void *p)
{
    struct ipw_priv *priv = libipw_priv(dev);
    struct sockaddr *addr = p;

    if (!is_valid_ether_addr(addr->sa_data))
        return -EADDRNOTAVAIL;
    mutex_lock(&priv->mutex);
    priv->config |= CFG_CUSTOM_MAC;
    memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
    printk(KERN_INFO "%s: Setting MAC to %pM\n",
           priv->net_dev->name, priv->mac_addr);
    schedule_work(&priv->adapter_restart);
    mutex_unlock(&priv->mutex);
    return 0;
}

static void ipw_ethtool_get_drvinfo(struct net_device *dev,
                    struct ethtool_drvinfo *info)
{
    struct ipw_priv *p = libipw_priv(dev);
    char vers[64];
    char date[32];
    u32 len;

    strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
    strlcpy(info->version, DRV_VERSION, sizeof(info->version));

    len = sizeof(vers);
    ipw_get_ordinal(p, IPW_ORD_STAT_FW_VERSION, vers, &len);
    len = sizeof(date);
    ipw_get_ordinal(p, IPW_ORD_STAT_FW_DATE, date, &len);

    snprintf(info->fw_version, sizeof(info->fw_version), "%s (%s)",
         vers, date);
    strlcpy(info->bus_info, pci_name(p->pci_dev),
        sizeof(info->bus_info));
    info->eedump_len = IPW_EEPROM_IMAGE_SIZE;
}

static u32 ipw_ethtool_get_link(struct net_device *dev)
{
    struct ipw_priv *priv = libipw_priv(dev);
    return (priv->status & STATUS_ASSOCIATED) != 0;
}

static int ipw_ethtool_get_eeprom_len(struct net_device *dev)
{
    return IPW_EEPROM_IMAGE_SIZE;
}

static int ipw_ethtool_get_eeprom(struct net_device *dev,
                  struct ethtool_eeprom *eeprom, u8 * bytes)
{
    struct ipw_priv *p = libipw_priv(dev);

    if (eeprom->offset + eeprom->len > IPW_EEPROM_IMAGE_SIZE)
        return -EINVAL;
    mutex_lock(&p->mutex);
    memcpy(bytes, &p->eeprom[eeprom->offset], eeprom->len);
    mutex_unlock(&p->mutex);
    return 0;
}

static int ipw_ethtool_set_eeprom(struct net_device *dev,
                  struct ethtool_eeprom *eeprom, u8 * bytes)
{
    struct ipw_priv *p = libipw_priv(dev);
    int i;

    if (eeprom->offset + eeprom->len > IPW_EEPROM_IMAGE_SIZE)
        return -EINVAL;
    mutex_lock(&p->mutex);
    memcpy(&p->eeprom[eeprom->offset], bytes, eeprom->len);
    for (i = 0; i < IPW_EEPROM_IMAGE_SIZE; i++)
        ipw_write8(p, i + IPW_EEPROM_DATA, p->eeprom[i]);
    mutex_unlock(&p->mutex);
    return 0;
}

static const struct ethtool_ops ipw_ethtool_ops = {
    .get_link = ipw_ethtool_get_link,
    .get_drvinfo = ipw_ethtool_get_drvinfo,
    .get_eeprom_len = ipw_ethtool_get_eeprom_len,
    .get_eeprom = ipw_ethtool_get_eeprom,
    .set_eeprom = ipw_ethtool_set_eeprom,
};

static irqreturn_t ipw_isr(int irq, void *data)
{
    struct ipw_priv *priv = data;
    u32 inta, inta_mask;

    if (!priv)
        return IRQ_NONE;

    spin_lock(&priv->irq_lock);

    if (!(priv->status & STATUS_INT_ENABLED)) {
        /* IRQ is disabled */
        goto none;
    }

    inta = ipw_read32(priv, IPW_INTA_RW);
    inta_mask = ipw_read32(priv, IPW_INTA_MASK_R);

    if (inta == 0xFFFFFFFF) {
        /* Hardware disappeared */
        IPW_WARNING("IRQ INTA == 0xFFFFFFFF\n");
        goto none;
    }

    if (!(inta & (IPW_INTA_MASK_ALL & inta_mask))) {
        /* Shared interrupt */
        goto none;
    }

    /* tell the device to stop sending interrupts */
    __ipw_disable_interrupts(priv);

    /* ack current interrupts */
    inta &= (IPW_INTA_MASK_ALL & inta_mask);
    ipw_write32(priv, IPW_INTA_RW, inta);

    /* Cache INTA value for our tasklet */
    priv->isr_inta = inta;

    tasklet_schedule(&priv->irq_tasklet);

    spin_unlock(&priv->irq_lock);

    return IRQ_HANDLED;
      none:
    spin_unlock(&priv->irq_lock);
    return IRQ_NONE;
}

static void ipw_rf_kill(void *adapter)
{
    struct ipw_priv *priv = adapter;
    unsigned long flags;

    spin_lock_irqsave(&priv->lock, flags);

    if (rf_kill_active(priv)) {
        IPW_DEBUG_RF_KILL("RF Kill active, rescheduling GPIO check\n");
        schedule_delayed_work(&priv->rf_kill, 2 * HZ);
        goto exit_unlock;
    }

    /* RF Kill is now disabled, so bring the device back up */

    if (!(priv->status & STATUS_RF_KILL_MASK)) {
        IPW_DEBUG_RF_KILL("HW RF Kill no longer active, restarting "
                  "device\n");

        /* we can not do an adapter restart while inside an irq lock */
        schedule_work(&priv->adapter_restart);
    } else
        IPW_DEBUG_RF_KILL("HW RF Kill deactivated.  SW RF Kill still "
                  "enabled\n");

      exit_unlock:
    spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_rf_kill(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, rf_kill.work);
    mutex_lock(&priv->mutex);
    ipw_rf_kill(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_link_up(struct ipw_priv *priv)
{
    priv->last_seq_num = -1;
    priv->last_frag_num = -1;
    priv->last_packet_time = 0;

    netif_carrier_on(priv->net_dev);

    cancel_delayed_work(&priv->request_scan);
    cancel_delayed_work(&priv->request_direct_scan);
    cancel_delayed_work(&priv->request_passive_scan);
    cancel_delayed_work(&priv->scan_event);
    ipw_reset_stats(priv);
    /* Ensure the rate is updated immediately */
    priv->last_rate = ipw_get_current_rate(priv);
    ipw_gather_stats(priv);
    ipw_led_link_up(priv);
    notify_wx_assoc_event(priv);

    if (priv->config & CFG_BACKGROUND_SCAN)
        schedule_delayed_work(&priv->request_scan, HZ);
}

static void ipw_bg_link_up(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, link_up);
    mutex_lock(&priv->mutex);
    ipw_link_up(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_link_down(struct ipw_priv *priv)
{
    ipw_led_link_down(priv);
    netif_carrier_off(priv->net_dev);
    notify_wx_assoc_event(priv);

    /* Cancel any queued work ... */
    cancel_delayed_work(&priv->request_scan);
    cancel_delayed_work(&priv->request_direct_scan);
    cancel_delayed_work(&priv->request_passive_scan);
    cancel_delayed_work(&priv->adhoc_check);
    cancel_delayed_work(&priv->gather_stats);

    ipw_reset_stats(priv);

    if (!(priv->status & STATUS_EXIT_PENDING)) {
        /* Queue up another scan... */
        schedule_delayed_work(&priv->request_scan, 0);
    } else
        cancel_delayed_work(&priv->scan_event);
}

static void ipw_bg_link_down(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, link_down);
    mutex_lock(&priv->mutex);
    ipw_link_down(priv);
    mutex_unlock(&priv->mutex);
}

static int __devinit ipw_setup_deferred_work(struct ipw_priv *priv)
{
    int ret = 0;

    init_waitqueue_head(&priv->wait_command_queue);
    init_waitqueue_head(&priv->wait_state);

    INIT_DELAYED_WORK(&priv->adhoc_check, ipw_bg_adhoc_check);
    INIT_WORK(&priv->associate, ipw_bg_associate);
    INIT_WORK(&priv->disassociate, ipw_bg_disassociate);
    INIT_WORK(&priv->system_config, ipw_system_config);
    INIT_WORK(&priv->rx_replenish, ipw_bg_rx_queue_replenish);
    INIT_WORK(&priv->adapter_restart, ipw_bg_adapter_restart);
    INIT_DELAYED_WORK(&priv->rf_kill, ipw_bg_rf_kill);
    INIT_WORK(&priv->up, ipw_bg_up);
    INIT_WORK(&priv->down, ipw_bg_down);
    INIT_DELAYED_WORK(&priv->request_scan, ipw_request_scan);
    INIT_DELAYED_WORK(&priv->request_direct_scan, ipw_request_direct_scan);
    INIT_DELAYED_WORK(&priv->request_passive_scan, ipw_request_passive_scan);
    INIT_DELAYED_WORK(&priv->scan_event, ipw_scan_event);
    INIT_DELAYED_WORK(&priv->gather_stats, ipw_bg_gather_stats);
    INIT_WORK(&priv->abort_scan, ipw_bg_abort_scan);
    INIT_WORK(&priv->roam, ipw_bg_roam);
    INIT_DELAYED_WORK(&priv->scan_check, ipw_bg_scan_check);
    INIT_WORK(&priv->link_up, ipw_bg_link_up);
    INIT_WORK(&priv->link_down, ipw_bg_link_down);
    INIT_DELAYED_WORK(&priv->led_link_on, ipw_bg_led_link_on);
    INIT_DELAYED_WORK(&priv->led_link_off, ipw_bg_led_link_off);
    INIT_DELAYED_WORK(&priv->led_act_off, ipw_bg_led_activity_off);
    INIT_WORK(&priv->merge_networks, ipw_merge_adhoc_network);

#ifdef CONFIG_IPW2200_QOS
    INIT_WORK(&priv->qos_activate, ipw_bg_qos_activate);
#endif              /* CONFIG_IPW2200_QOS */

    tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
             ipw_irq_tasklet, (unsigned long)priv);

    return ret;
}

static void shim__set_security(struct net_device *dev,
                   struct libipw_security *sec)
{
    struct ipw_priv *priv = libipw_priv(dev);
    int i;
    for (i = 0; i < 4; i++) {
        if (sec->flags & (1 << i)) {
            priv->ieee->sec.encode_alg[i] = sec->encode_alg[i];
            priv->ieee->sec.key_sizes[i] = sec->key_sizes[i];
            if (sec->key_sizes[i] == 0)
                priv->ieee->sec.flags &= ~(1 << i);
            else {
                memcpy(priv->ieee->sec.keys[i], sec->keys[i],
                       sec->key_sizes[i]);
                priv->ieee->sec.flags |= (1 << i);
            }
            priv->status |= STATUS_SECURITY_UPDATED;
        } else if (sec->level != SEC_LEVEL_1)
            priv->ieee->sec.flags &= ~(1 << i);
    }

    if (sec->flags & SEC_ACTIVE_KEY) {
        if (sec->active_key <= 3) {
            priv->ieee->sec.active_key = sec->active_key;
            priv->ieee->sec.flags |= SEC_ACTIVE_KEY;
        } else
            priv->ieee->sec.flags &= ~SEC_ACTIVE_KEY;
        priv->status |= STATUS_SECURITY_UPDATED;
    } else
        priv->ieee->sec.flags &= ~SEC_ACTIVE_KEY;

    if ((sec->flags & SEC_AUTH_MODE) &&
        (priv->ieee->sec.auth_mode != sec->auth_mode)) {
        priv->ieee->sec.auth_mode = sec->auth_mode;
        priv->ieee->sec.flags |= SEC_AUTH_MODE;
        if (sec->auth_mode == WLAN_AUTH_SHARED_KEY)
            priv->capability |= CAP_SHARED_KEY;
        else
            priv->capability &= ~CAP_SHARED_KEY;
        priv->status |= STATUS_SECURITY_UPDATED;
    }

    if (sec->flags & SEC_ENABLED && priv->ieee->sec.enabled != sec->enabled) {
        priv->ieee->sec.flags |= SEC_ENABLED;
        priv->ieee->sec.enabled = sec->enabled;
        priv->status |= STATUS_SECURITY_UPDATED;
        if (sec->enabled)
            priv->capability |= CAP_PRIVACY_ON;
        else
            priv->capability &= ~CAP_PRIVACY_ON;
    }

    if (sec->flags & SEC_ENCRYPT)
        priv->ieee->sec.encrypt = sec->encrypt;

    if (sec->flags & SEC_LEVEL && priv->ieee->sec.level != sec->level) {
        priv->ieee->sec.level = sec->level;
        priv->ieee->sec.flags |= SEC_LEVEL;
        priv->status |= STATUS_SECURITY_UPDATED;
    }

    if (!priv->ieee->host_encrypt && (sec->flags & SEC_ENCRYPT))
        ipw_set_hwcrypto_keys(priv);

    /* To match current functionality of ipw2100 (which works well w/
     * various supplicants, we don't force a disassociate if the
     * privacy capability changes ... */
#if 0
    if ((priv->status & (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) &&
        (((priv->assoc_request.capability &
           cpu_to_le16(WLAN_CAPABILITY_PRIVACY)) && !sec->enabled) ||
         (!(priv->assoc_request.capability &
        cpu_to_le16(WLAN_CAPABILITY_PRIVACY)) && sec->enabled))) {
        IPW_DEBUG_ASSOC("Disassociating due to capability "
                "change.\n");
        ipw_disassociate(priv);
    }
#endif
}

static int init_supported_rates(struct ipw_priv *priv,
                struct ipw_supported_rates *rates)
{
    /* TODO: Mask out rates based on priv->rates_mask */

    memset(rates, 0, sizeof(*rates));
    /* configure supported rates */
    switch (priv->ieee->freq_band) {
    case LIBIPW_52GHZ_BAND:
        rates->ieee_mode = IPW_A_MODE;
        rates->purpose = IPW_RATE_CAPABILITIES;
        ipw_add_ofdm_scan_rates(rates, LIBIPW_CCK_MODULATION,
                    LIBIPW_OFDM_DEFAULT_RATES_MASK);
        break;

    default:        /* Mixed or 2.4Ghz */
        rates->ieee_mode = IPW_G_MODE;
        rates->purpose = IPW_RATE_CAPABILITIES;
        ipw_add_cck_scan_rates(rates, LIBIPW_CCK_MODULATION,
                       LIBIPW_CCK_DEFAULT_RATES_MASK);
        if (priv->ieee->modulation & LIBIPW_OFDM_MODULATION) {
            ipw_add_ofdm_scan_rates(rates, LIBIPW_CCK_MODULATION,
                        LIBIPW_OFDM_DEFAULT_RATES_MASK);
        }
        break;
    }

    return 0;
}

static int ipw_config(struct ipw_priv *priv)
{
    /* This is only called from ipw_up, which resets/reloads the firmware
       so, we don't need to first disable the card before we configure
       it */
    if (ipw_set_tx_power(priv))
        goto error;

    /* initialize adapter address */
    if (ipw_send_adapter_address(priv, priv->net_dev->dev_addr))
        goto error;

    /* set basic system config settings */
    init_sys_config(&priv->sys_config);

    /* Support Bluetooth if we have BT h/w on board, and user wants to.
     * Does not support BT priority yet (don't abort or defer our Tx) */
    if (bt_coexist) {
        unsigned char bt_caps = priv->eeprom[EEPROM_SKU_CAPABILITY];

        if (bt_caps & EEPROM_SKU_CAP_BT_CHANNEL_SIG)
            priv->sys_config.bt_coexistence
                |= CFG_BT_COEXISTENCE_SIGNAL_CHNL;
        if (bt_caps & EEPROM_SKU_CAP_BT_OOB)
            priv->sys_config.bt_coexistence
                |= CFG_BT_COEXISTENCE_OOB;
    }

#ifdef CONFIG_IPW2200_PROMISCUOUS
    if (priv->prom_net_dev && netif_running(priv->prom_net_dev)) {
        priv->sys_config.accept_all_data_frames = 1;
        priv->sys_config.accept_non_directed_frames = 1;
        priv->sys_config.accept_all_mgmt_bcpr = 1;
        priv->sys_config.accept_all_mgmt_frames = 1;
    }
#endif

    if (priv->ieee->iw_mode == IW_MODE_ADHOC)
        priv->sys_config.answer_broadcast_ssid_probe = 1;
    else
        priv->sys_config.answer_broadcast_ssid_probe = 0;

    if (ipw_send_system_config(priv))
        goto error;

    init_supported_rates(priv, &priv->rates);
    if (ipw_send_supported_rates(priv, &priv->rates))
        goto error;

    /* Set request-to-send threshold */
    if (priv->rts_threshold) {
        if (ipw_send_rts_threshold(priv, priv->rts_threshold))
            goto error;
    }
#ifdef CONFIG_IPW2200_QOS
    IPW_DEBUG_QOS("QoS: call ipw_qos_activate\n");
    ipw_qos_activate(priv, NULL);
#endif              /* CONFIG_IPW2200_QOS */

    if (ipw_set_random_seed(priv))
        goto error;

    /* final state transition to the RUN state */
    if (ipw_send_host_complete(priv))
        goto error;

    priv->status |= STATUS_INIT;

    ipw_led_init(priv);
    ipw_led_radio_on(priv);
    priv->notif_missed_beacons = 0;

    /* Set hardware WEP key if it is configured. */
    if ((priv->capability & CAP_PRIVACY_ON) &&
        (priv->ieee->sec.level == SEC_LEVEL_1) &&
        !(priv->ieee->host_encrypt || priv->ieee->host_decrypt))
        ipw_set_hwcrypto_keys(priv);

    return 0;

      error:
    return -EIO;
}

/*
 * NOTE:
 *
 * These tables have been tested in conjunction with the
 * Intel PRO/Wireless 2200BG and 2915ABG Network Connection Adapters.
 *
 * Altering this values, using it on other hardware, or in geographies
 * not intended for resale of the above mentioned Intel adapters has
 * not been tested.
 *
 * Remember to update the table in README.ipw2200 when changing this
 * table.
 *
 */
static const struct libipw_geo ipw_geos[] = {
    {           /* Restricted */
     "---",
     .bg_channels = 11,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}},
     },

    {           /* Custom US/Canada */
     "ZZF",
     .bg_channels = 11,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}},
     .a_channels = 8,
     .a = {{5180, 36},
           {5200, 40},
           {5220, 44},
           {5240, 48},
           {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
           {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
           {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
           {5320, 64, LIBIPW_CH_PASSIVE_ONLY}},
     },

    {           /* Rest of World */
     "ZZD",
     .bg_channels = 13,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}, {2467, 12},
        {2472, 13}},
     },

    {           /* Custom USA & Europe & High */
     "ZZA",
     .bg_channels = 11,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}},
     .a_channels = 13,
     .a = {{5180, 36},
           {5200, 40},
           {5220, 44},
           {5240, 48},
           {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
           {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
           {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
           {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
           {5745, 149},
           {5765, 153},
           {5785, 157},
           {5805, 161},
           {5825, 165}},
     },

    {           /* Custom NA & Europe */
     "ZZB",
     .bg_channels = 11,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}},
     .a_channels = 13,
     .a = {{5180, 36},
           {5200, 40},
           {5220, 44},
           {5240, 48},
           {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
           {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
           {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
           {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
           {5745, 149, LIBIPW_CH_PASSIVE_ONLY},
           {5765, 153, LIBIPW_CH_PASSIVE_ONLY},
           {5785, 157, LIBIPW_CH_PASSIVE_ONLY},
           {5805, 161, LIBIPW_CH_PASSIVE_ONLY},
           {5825, 165, LIBIPW_CH_PASSIVE_ONLY}},
     },

    {           /* Custom Japan */
     "ZZC",
     .bg_channels = 11,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}},
     .a_channels = 4,
     .a = {{5170, 34}, {5190, 38},
           {5210, 42}, {5230, 46}},
     },

    {           /* Custom */
     "ZZM",
     .bg_channels = 11,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}},
     },

    {           /* Europe */
     "ZZE",
     .bg_channels = 13,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}, {2467, 12},
        {2472, 13}},
     .a_channels = 19,
     .a = {{5180, 36},
           {5200, 40},
           {5220, 44},
           {5240, 48},
           {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
           {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
           {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
           {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
           {5500, 100, LIBIPW_CH_PASSIVE_ONLY},
           {5520, 104, LIBIPW_CH_PASSIVE_ONLY},
           {5540, 108, LIBIPW_CH_PASSIVE_ONLY},
           {5560, 112, LIBIPW_CH_PASSIVE_ONLY},
           {5580, 116, LIBIPW_CH_PASSIVE_ONLY},
           {5600, 120, LIBIPW_CH_PASSIVE_ONLY},
           {5620, 124, LIBIPW_CH_PASSIVE_ONLY},
           {5640, 128, LIBIPW_CH_PASSIVE_ONLY},
           {5660, 132, LIBIPW_CH_PASSIVE_ONLY},
           {5680, 136, LIBIPW_CH_PASSIVE_ONLY},
           {5700, 140, LIBIPW_CH_PASSIVE_ONLY}},
     },

    {           /* Custom Japan */
     "ZZJ",
     .bg_channels = 14,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}, {2467, 12},
        {2472, 13}, {2484, 14, LIBIPW_CH_B_ONLY}},
     .a_channels = 4,
     .a = {{5170, 34}, {5190, 38},
           {5210, 42}, {5230, 46}},
     },

    {           /* Rest of World */
     "ZZR",
     .bg_channels = 14,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}, {2467, 12},
        {2472, 13}, {2484, 14, LIBIPW_CH_B_ONLY |
                 LIBIPW_CH_PASSIVE_ONLY}},
     },

    {           /* High Band */
     "ZZH",
     .bg_channels = 13,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11},
        {2467, 12, LIBIPW_CH_PASSIVE_ONLY},
        {2472, 13, LIBIPW_CH_PASSIVE_ONLY}},
     .a_channels = 4,
     .a = {{5745, 149}, {5765, 153},
           {5785, 157}, {5805, 161}},
     },

    {           /* Custom Europe */
     "ZZG",
     .bg_channels = 13,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11},
        {2467, 12}, {2472, 13}},
     .a_channels = 4,
     .a = {{5180, 36}, {5200, 40},
           {5220, 44}, {5240, 48}},
     },

    {           /* Europe */
     "ZZK",
     .bg_channels = 13,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11},
        {2467, 12, LIBIPW_CH_PASSIVE_ONLY},
        {2472, 13, LIBIPW_CH_PASSIVE_ONLY}},
     .a_channels = 24,
     .a = {{5180, 36, LIBIPW_CH_PASSIVE_ONLY},
           {5200, 40, LIBIPW_CH_PASSIVE_ONLY},
           {5220, 44, LIBIPW_CH_PASSIVE_ONLY},
           {5240, 48, LIBIPW_CH_PASSIVE_ONLY},
           {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
           {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
           {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
           {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
           {5500, 100, LIBIPW_CH_PASSIVE_ONLY},
           {5520, 104, LIBIPW_CH_PASSIVE_ONLY},
           {5540, 108, LIBIPW_CH_PASSIVE_ONLY},
           {5560, 112, LIBIPW_CH_PASSIVE_ONLY},
           {5580, 116, LIBIPW_CH_PASSIVE_ONLY},
           {5600, 120, LIBIPW_CH_PASSIVE_ONLY},
           {5620, 124, LIBIPW_CH_PASSIVE_ONLY},
           {5640, 128, LIBIPW_CH_PASSIVE_ONLY},
           {5660, 132, LIBIPW_CH_PASSIVE_ONLY},
           {5680, 136, LIBIPW_CH_PASSIVE_ONLY},
           {5700, 140, LIBIPW_CH_PASSIVE_ONLY},
           {5745, 149, LIBIPW_CH_PASSIVE_ONLY},
           {5765, 153, LIBIPW_CH_PASSIVE_ONLY},
           {5785, 157, LIBIPW_CH_PASSIVE_ONLY},
           {5805, 161, LIBIPW_CH_PASSIVE_ONLY},
           {5825, 165, LIBIPW_CH_PASSIVE_ONLY}},
     },

    {           /* Europe */
     "ZZL",
     .bg_channels = 11,
     .bg = {{2412, 1}, {2417, 2}, {2422, 3},
        {2427, 4}, {2432, 5}, {2437, 6},
        {2442, 7}, {2447, 8}, {2452, 9},
        {2457, 10}, {2462, 11}},
     .a_channels = 13,
     .a = {{5180, 36, LIBIPW_CH_PASSIVE_ONLY},
           {5200, 40, LIBIPW_CH_PASSIVE_ONLY},
           {5220, 44, LIBIPW_CH_PASSIVE_ONLY},
           {5240, 48, LIBIPW_CH_PASSIVE_ONLY},
           {5260, 52, LIBIPW_CH_PASSIVE_ONLY},
           {5280, 56, LIBIPW_CH_PASSIVE_ONLY},
           {5300, 60, LIBIPW_CH_PASSIVE_ONLY},
           {5320, 64, LIBIPW_CH_PASSIVE_ONLY},
           {5745, 149, LIBIPW_CH_PASSIVE_ONLY},
           {5765, 153, LIBIPW_CH_PASSIVE_ONLY},
           {5785, 157, LIBIPW_CH_PASSIVE_ONLY},
           {5805, 161, LIBIPW_CH_PASSIVE_ONLY},
           {5825, 165, LIBIPW_CH_PASSIVE_ONLY}},
     }
};

#define MAX_HW_RESTARTS 5
static int ipw_up(struct ipw_priv *priv)
{
    int rc, i, j;

    /* Age scan list entries found before suspend */
    if (priv->suspend_time) {
        libipw_networks_age(priv->ieee, priv->suspend_time);
        priv->suspend_time = 0;
    }

    if (priv->status & STATUS_EXIT_PENDING)
        return -EIO;

    if (cmdlog && !priv->cmdlog) {
        priv->cmdlog = kcalloc(cmdlog, sizeof(*priv->cmdlog),
                       GFP_KERNEL);
        if (priv->cmdlog == NULL) {
            IPW_ERROR("Error allocating %d command log entries.\n",
                  cmdlog);
            return -ENOMEM;
        } else {
            priv->cmdlog_len = cmdlog;
        }
    }

    for (i = 0; i < MAX_HW_RESTARTS; i++) {
        /* Load the microcode, firmware, and eeprom.
         * Also start the clocks. */
        rc = ipw_load(priv);
        if (rc) {
            IPW_ERROR("Unable to load firmware: %d\n", rc);
            return rc;
        }

        ipw_init_ordinals(priv);
        if (!(priv->config & CFG_CUSTOM_MAC))
            eeprom_parse_mac(priv, priv->mac_addr);
        memcpy(priv->net_dev->dev_addr, priv->mac_addr, ETH_ALEN);
        memcpy(priv->net_dev->perm_addr, priv->mac_addr, ETH_ALEN);

        for (j = 0; j < ARRAY_SIZE(ipw_geos); j++) {
            if (!memcmp(&priv->eeprom[EEPROM_COUNTRY_CODE],
                    ipw_geos[j].name, 3))
                break;
        }
        if (j == ARRAY_SIZE(ipw_geos)) {
            IPW_WARNING("SKU [%c%c%c] not recognized.\n",
                    priv->eeprom[EEPROM_COUNTRY_CODE + 0],
                    priv->eeprom[EEPROM_COUNTRY_CODE + 1],
                    priv->eeprom[EEPROM_COUNTRY_CODE + 2]);
            j = 0;
        }
        if (libipw_set_geo(priv->ieee, &ipw_geos[j])) {
            IPW_WARNING("Could not set geography.");
            return 0;
        }

        if (priv->status & STATUS_RF_KILL_SW) {
            IPW_WARNING("Radio disabled by module parameter.\n");
            return 0;
        } else if (rf_kill_active(priv)) {
            IPW_WARNING("Radio Frequency Kill Switch is On:\n"
                    "Kill switch must be turned off for "
                    "wireless networking to work.\n");
            schedule_delayed_work(&priv->rf_kill, 2 * HZ);
            return 0;
        }

        rc = ipw_config(priv);
        if (!rc) {
            IPW_DEBUG_INFO("Configured device on count %i\n", i);

            /* If configure to try and auto-associate, kick
             * off a scan. */
            schedule_delayed_work(&priv->request_scan, 0);

            return 0;
        }

        IPW_DEBUG_INFO("Device configuration failed: 0x%08X\n", rc);
        IPW_DEBUG_INFO("Failed to config device on retry %d of %d\n",
                   i, MAX_HW_RESTARTS);

        /* We had an error bringing up the hardware, so take it
         * all the way back down so we can try again */
        ipw_down(priv);
    }

    /* tried to restart and config the device for as long as our
     * patience could withstand */
    IPW_ERROR("Unable to initialize device after %d attempts.\n", i);

    return -EIO;
}

static void ipw_bg_up(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, up);
    mutex_lock(&priv->mutex);
    ipw_up(priv);
    mutex_unlock(&priv->mutex);
}

static void ipw_deinit(struct ipw_priv *priv)
{
    int i;

    if (priv->status & STATUS_SCANNING) {
        IPW_DEBUG_INFO("Aborting scan during shutdown.\n");
        ipw_abort_scan(priv);
    }

    if (priv->status & STATUS_ASSOCIATED) {
        IPW_DEBUG_INFO("Disassociating during shutdown.\n");
        ipw_disassociate(priv);
    }

    ipw_led_shutdown(priv);

    /* Wait up to 1s for status to change to not scanning and not
     * associated (disassociation can take a while for a ful 802.11
     * exchange */
    for (i = 1000; i && (priv->status &
                 (STATUS_DISASSOCIATING |
                  STATUS_ASSOCIATED | STATUS_SCANNING)); i--)
        udelay(10);

    if (priv->status & (STATUS_DISASSOCIATING |
                STATUS_ASSOCIATED | STATUS_SCANNING))
        IPW_DEBUG_INFO("Still associated or scanning...\n");
    else
        IPW_DEBUG_INFO("Took %dms to de-init\n", 1000 - i);

    /* Attempt to disable the card */
    ipw_send_card_disable(priv, 0);

    priv->status &= ~STATUS_INIT;
}

static void ipw_down(struct ipw_priv *priv)
{
    int exit_pending = priv->status & STATUS_EXIT_PENDING;

    priv->status |= STATUS_EXIT_PENDING;

    if (ipw_is_init(priv))
        ipw_deinit(priv);

    /* Wipe out the EXIT_PENDING status bit if we are not actually
     * exiting the module */
    if (!exit_pending)
        priv->status &= ~STATUS_EXIT_PENDING;

    /* tell the device to stop sending interrupts */
    ipw_disable_interrupts(priv);

    /* Clear all bits but the RF Kill */
    priv->status &= STATUS_RF_KILL_MASK | STATUS_EXIT_PENDING;
    netif_carrier_off(priv->net_dev);

    ipw_stop_nic(priv);

    ipw_led_radio_off(priv);
}

static void ipw_bg_down(struct work_struct *work)
{
    struct ipw_priv *priv =
        container_of(work, struct ipw_priv, down);
    mutex_lock(&priv->mutex);
    ipw_down(priv);
    mutex_unlock(&priv->mutex);
}

static int ipw_wdev_init(struct net_device *dev)
{
    int i, rc = 0;
    struct ipw_priv *priv = libipw_priv(dev);
    const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
    struct wireless_dev *wdev = &priv->ieee->wdev;

    memcpy(wdev->wiphy->perm_addr, priv->mac_addr, ETH_ALEN);

    /* fill-out priv->ieee->bg_band */
    if (geo->bg_channels) {
        struct ieee80211_supported_band *bg_band = &priv->ieee->bg_band;

        bg_band->band = IEEE80211_BAND_2GHZ;
        bg_band->n_channels = geo->bg_channels;
        bg_band->channels = kcalloc(geo->bg_channels,
                        sizeof(struct ieee80211_channel),
                        GFP_KERNEL);
        if (!bg_band->channels) {
            rc = -ENOMEM;
            goto out;
        }
        /* translate geo->bg to bg_band.channels */
        for (i = 0; i < geo->bg_channels; i++) {
            bg_band->channels[i].band = IEEE80211_BAND_2GHZ;
            bg_band->channels[i].center_freq = geo->bg[i].freq;
            bg_band->channels[i].hw_value = geo->bg[i].channel;
            bg_band->channels[i].max_power = geo->bg[i].max_power;
            if (geo->bg[i].flags & LIBIPW_CH_PASSIVE_ONLY)
                bg_band->channels[i].flags |=
                    IEEE80211_CHAN_PASSIVE_SCAN;
            if (geo->bg[i].flags & LIBIPW_CH_NO_IBSS)
                bg_band->channels[i].flags |=
                    IEEE80211_CHAN_NO_IBSS;
            if (geo->bg[i].flags & LIBIPW_CH_RADAR_DETECT)
                bg_band->channels[i].flags |=
                    IEEE80211_CHAN_RADAR;
            /* No equivalent for LIBIPW_CH_80211H_RULES,
               LIBIPW_CH_UNIFORM_SPREADING, or
               LIBIPW_CH_B_ONLY... */
        }
        /* point at bitrate info */
        bg_band->bitrates = ipw2200_bg_rates;
        bg_band->n_bitrates = ipw2200_num_bg_rates;

        wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = bg_band;
    }

    /* fill-out priv->ieee->a_band */
    if (geo->a_channels) {
        struct ieee80211_supported_band *a_band = &priv->ieee->a_band;

        a_band->band = IEEE80211_BAND_5GHZ;
        a_band->n_channels = geo->a_channels;
        a_band->channels = kcalloc(geo->a_channels,
                       sizeof(struct ieee80211_channel),
                       GFP_KERNEL);
        if (!a_band->channels) {
            rc = -ENOMEM;
            goto out;
        }
        /* translate geo->a to a_band.channels */
        for (i = 0; i < geo->a_channels; i++) {
            a_band->channels[i].band = IEEE80211_BAND_5GHZ;
            a_band->channels[i].center_freq = geo->a[i].freq;
            a_band->channels[i].hw_value = geo->a[i].channel;
            a_band->channels[i].max_power = geo->a[i].max_power;
            if (geo->a[i].flags & LIBIPW_CH_PASSIVE_ONLY)
                a_band->channels[i].flags |=
                    IEEE80211_CHAN_PASSIVE_SCAN;
            if (geo->a[i].flags & LIBIPW_CH_NO_IBSS)
                a_band->channels[i].flags |=
                    IEEE80211_CHAN_NO_IBSS;
            if (geo->a[i].flags & LIBIPW_CH_RADAR_DETECT)
                a_band->channels[i].flags |=
                    IEEE80211_CHAN_RADAR;
            /* No equivalent for LIBIPW_CH_80211H_RULES,
               LIBIPW_CH_UNIFORM_SPREADING, or
               LIBIPW_CH_B_ONLY... */
        }
        /* point at bitrate info */
        a_band->bitrates = ipw2200_a_rates;
        a_band->n_bitrates = ipw2200_num_a_rates;

        wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = a_band;
    }

    wdev->wiphy->cipher_suites = ipw_cipher_suites;
    wdev->wiphy->n_cipher_suites = ARRAY_SIZE(ipw_cipher_suites);

    set_wiphy_dev(wdev->wiphy, &priv->pci_dev->dev);

    /* With that information in place, we can now register the wiphy... */
    if (wiphy_register(wdev->wiphy))
        rc = -EIO;
out:
    return rc;
}

/* PCI driver stuff */
static DEFINE_PCI_DEVICE_TABLE(card_ids) = {
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2701, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2702, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2711, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2712, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2721, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2722, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2731, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2732, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2741, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x103c, 0x2741, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2742, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2751, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2752, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2753, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2754, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2761, 0, 0, 0},
    {PCI_VENDOR_ID_INTEL, 0x1043, 0x8086, 0x2762, 0, 0, 0},
    {PCI_VDEVICE(INTEL, 0x104f), 0},
    {PCI_VDEVICE(INTEL, 0x4220), 0},    /* BG */
    {PCI_VDEVICE(INTEL, 0x4221), 0},    /* BG */
    {PCI_VDEVICE(INTEL, 0x4223), 0},    /* ABG */
    {PCI_VDEVICE(INTEL, 0x4224), 0},    /* ABG */

    /* required last entry */
    {0,}
};

MODULE_DEVICE_TABLE(pci, card_ids);

static struct attribute *ipw_sysfs_entries[] = {
    &dev_attr_rf_kill.attr,
    &dev_attr_direct_dword.attr,
    &dev_attr_indirect_byte.attr,
    &dev_attr_indirect_dword.attr,
    &dev_attr_mem_gpio_reg.attr,
    &dev_attr_command_event_reg.attr,
    &dev_attr_nic_type.attr,
    &dev_attr_status.attr,
    &dev_attr_cfg.attr,
    &dev_attr_error.attr,
    &dev_attr_event_log.attr,
    &dev_attr_cmd_log.attr,
    &dev_attr_eeprom_delay.attr,
    &dev_attr_ucode_version.attr,
    &dev_attr_rtc.attr,
    &dev_attr_scan_age.attr,
    &dev_attr_led.attr,
    &dev_attr_speed_scan.attr,
    &dev_attr_net_stats.attr,
    &dev_attr_channels.attr,
#ifdef CONFIG_IPW2200_PROMISCUOUS
    &dev_attr_rtap_iface.attr,
    &dev_attr_rtap_filter.attr,
#endif
    NULL
};

static struct attribute_group ipw_attribute_group = {
    .name = NULL,       /* put in device directory */
    .attrs = ipw_sysfs_entries,
};

#ifdef CONFIG_IPW2200_PROMISCUOUS
static int ipw_prom_open(struct net_device *dev)
{
    struct ipw_prom_priv *prom_priv = libipw_priv(dev);
    struct ipw_priv *priv = prom_priv->priv;

    IPW_DEBUG_INFO("prom dev->open\n");
    netif_carrier_off(dev);

    if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
        priv->sys_config.accept_all_data_frames = 1;
        priv->sys_config.accept_non_directed_frames = 1;
        priv->sys_config.accept_all_mgmt_bcpr = 1;
        priv->sys_config.accept_all_mgmt_frames = 1;

        ipw_send_system_config(priv);
    }

    return 0;
}

static int ipw_prom_stop(struct net_device *dev)
{
    struct ipw_prom_priv *prom_priv = libipw_priv(dev);
    struct ipw_priv *priv = prom_priv->priv;

    IPW_DEBUG_INFO("prom dev->stop\n");

    if (priv->ieee->iw_mode != IW_MODE_MONITOR) {
        priv->sys_config.accept_all_data_frames = 0;
        priv->sys_config.accept_non_directed_frames = 0;
        priv->sys_config.accept_all_mgmt_bcpr = 0;
        priv->sys_config.accept_all_mgmt_frames = 0;

        ipw_send_system_config(priv);
    }

    return 0;
}

static netdev_tx_t ipw_prom_hard_start_xmit(struct sk_buff *skb,
                        struct net_device *dev)
{
    IPW_DEBUG_INFO("prom dev->xmit\n");
    dev_kfree_skb(skb);
    return NETDEV_TX_OK;
}

static const struct net_device_ops ipw_prom_netdev_ops = {
    .ndo_open       = ipw_prom_open,
    .ndo_stop       = ipw_prom_stop,
    .ndo_start_xmit     = ipw_prom_hard_start_xmit,
    .ndo_change_mtu     = libipw_change_mtu,
    .ndo_set_mac_address    = eth_mac_addr,
    .ndo_validate_addr  = eth_validate_addr,
};

static int ipw_prom_alloc(struct ipw_priv *priv)
{
    int rc = 0;

    if (priv->prom_net_dev)
        return -EPERM;

    priv->prom_net_dev = alloc_libipw(sizeof(struct ipw_prom_priv), 1);
    if (priv->prom_net_dev == NULL)
        return -ENOMEM;

    priv->prom_priv = libipw_priv(priv->prom_net_dev);
    priv->prom_priv->ieee = netdev_priv(priv->prom_net_dev);
    priv->prom_priv->priv = priv;

    strcpy(priv->prom_net_dev->name, "rtap%d");
    memcpy(priv->prom_net_dev->dev_addr, priv->mac_addr, ETH_ALEN);

    priv->prom_net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
    priv->prom_net_dev->netdev_ops = &ipw_prom_netdev_ops;

    priv->prom_priv->ieee->iw_mode = IW_MODE_MONITOR;
    SET_NETDEV_DEV(priv->prom_net_dev, &priv->pci_dev->dev);

    rc = register_netdev(priv->prom_net_dev);
    if (rc) {
        free_libipw(priv->prom_net_dev, 1);
        priv->prom_net_dev = NULL;
        return rc;
    }

    return 0;
}

static void ipw_prom_free(struct ipw_priv *priv)
{
    if (!priv->prom_net_dev)
        return;

    unregister_netdev(priv->prom_net_dev);
    free_libipw(priv->prom_net_dev, 1);

    priv->prom_net_dev = NULL;
}

#endif

static const struct net_device_ops ipw_netdev_ops = {
    .ndo_open       = ipw_net_open,
    .ndo_stop       = ipw_net_stop,
    .ndo_set_rx_mode    = ipw_net_set_multicast_list,
    .ndo_set_mac_address    = ipw_net_set_mac_address,
    .ndo_start_xmit     = libipw_xmit,
    .ndo_change_mtu     = libipw_change_mtu,
    .ndo_validate_addr  = eth_validate_addr,
};

static int __devinit ipw_pci_probe(struct pci_dev *pdev,
                   const struct pci_device_id *ent)
{
    int err = 0;
    struct net_device *net_dev;
    void __iomem *base;
    u32 length, val;
    struct ipw_priv *priv;
    int i;

    net_dev = alloc_libipw(sizeof(struct ipw_priv), 0);
    if (net_dev == NULL) {
        err = -ENOMEM;
        goto out;
    }

    priv = libipw_priv(net_dev);
    priv->ieee = netdev_priv(net_dev);

    priv->net_dev = net_dev;
    priv->pci_dev = pdev;
    ipw_debug_level = debug;
    spin_lock_init(&priv->irq_lock);
    spin_lock_init(&priv->lock);
    for (i = 0; i < IPW_IBSS_MAC_HASH_SIZE; i++)
        INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);

    mutex_init(&priv->mutex);
    if (pci_enable_device(pdev)) {
        err = -ENODEV;
        goto out_free_libipw;
    }

    pci_set_master(pdev);

    err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
    if (!err)
        err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
    if (err) {
        printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
        goto out_pci_disable_device;
    }

    pci_set_drvdata(pdev, priv);

    err = pci_request_regions(pdev, DRV_NAME);
    if (err)
        goto out_pci_disable_device;

    /* We disable the RETRY_TIMEOUT register (0x41) to keep
     * PCI Tx retries from interfering with C3 CPU state */
    pci_read_config_dword(pdev, 0x40, &val);
    if ((val & 0x0000ff00) != 0)
        pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);

    length = pci_resource_len(pdev, 0);
    priv->hw_len = length;

    base = pci_ioremap_bar(pdev, 0);
    if (!base) {
        err = -ENODEV;
        goto out_pci_release_regions;
    }

    priv->hw_base = base;
    IPW_DEBUG_INFO("pci_resource_len = 0x%08x\n", length);
    IPW_DEBUG_INFO("pci_resource_base = %p\n", base);

    err = ipw_setup_deferred_work(priv);
    if (err) {
        IPW_ERROR("Unable to setup deferred work\n");
        goto out_iounmap;
    }

    ipw_sw_reset(priv, 1);

    err = request_irq(pdev->irq, ipw_isr, IRQF_SHARED, DRV_NAME, priv);
    if (err) {
        IPW_ERROR("Error allocating IRQ %d\n", pdev->irq);
        goto out_iounmap;
    }

    SET_NETDEV_DEV(net_dev, &pdev->dev);

    mutex_lock(&priv->mutex);

    priv->ieee->hard_start_xmit = ipw_net_hard_start_xmit;
    priv->ieee->set_security = shim__set_security;
    priv->ieee->is_queue_full = ipw_net_is_queue_full;

#ifdef CONFIG_IPW2200_QOS
    priv->ieee->is_qos_active = ipw_is_qos_active;
    priv->ieee->handle_probe_response = ipw_handle_beacon;
    priv->ieee->handle_beacon = ipw_handle_probe_response;
    priv->ieee->handle_assoc_response = ipw_handle_assoc_response;
#endif              /* CONFIG_IPW2200_QOS */

    priv->ieee->perfect_rssi = -20;
    priv->ieee->worst_rssi = -85;

    net_dev->netdev_ops = &ipw_netdev_ops;
    priv->wireless_data.spy_data = &priv->ieee->spy_data;
    net_dev->wireless_data = &priv->wireless_data;
    net_dev->wireless_handlers = &ipw_wx_handler_def;
    net_dev->ethtool_ops = &ipw_ethtool_ops;

    err = sysfs_create_group(&pdev->dev.kobj, &ipw_attribute_group);
    if (err) {
        IPW_ERROR("failed to create sysfs device attributes\n");
        mutex_unlock(&priv->mutex);
        goto out_release_irq;
    }

    if (ipw_up(priv)) {
        mutex_unlock(&priv->mutex);
        err = -EIO;
        goto out_remove_sysfs;
    }

    mutex_unlock(&priv->mutex);

    err = ipw_wdev_init(net_dev);
    if (err) {
        IPW_ERROR("failed to register wireless device\n");
        goto out_remove_sysfs;
    }

    err = register_netdev(net_dev);
    if (err) {
        IPW_ERROR("failed to register network device\n");
        goto out_unregister_wiphy;
    }

#ifdef CONFIG_IPW2200_PROMISCUOUS
    if (rtap_iface) {
            err = ipw_prom_alloc(priv);
        if (err) {
            IPW_ERROR("Failed to register promiscuous network "
                  "device (error %d).\n", err);
            unregister_netdev(priv->net_dev);
            goto out_unregister_wiphy;
        }
    }
#endif

    printk(KERN_INFO DRV_NAME ": Detected geography %s (%d 802.11bg "
           "channels, %d 802.11a channels)\n",
           priv->ieee->geo.name, priv->ieee->geo.bg_channels,
           priv->ieee->geo.a_channels);

    return 0;

      out_unregister_wiphy:
    wiphy_unregister(priv->ieee->wdev.wiphy);
    kfree(priv->ieee->a_band.channels);
    kfree(priv->ieee->bg_band.channels);
      out_remove_sysfs:
    sysfs_remove_group(&pdev->dev.kobj, &ipw_attribute_group);
      out_release_irq:
    free_irq(pdev->irq, priv);
      out_iounmap:
    iounmap(priv->hw_base);
      out_pci_release_regions:
    pci_release_regions(pdev);
      out_pci_disable_device:
    pci_disable_device(pdev);
    pci_set_drvdata(pdev, NULL);
      out_free_libipw:
    free_libipw(priv->net_dev, 0);
      out:
    return err;
}

static void __devexit ipw_pci_remove(struct pci_dev *pdev)
{
    struct ipw_priv *priv = pci_get_drvdata(pdev);
    struct list_head *p, *q;
    int i;

    if (!priv)
        return;

    mutex_lock(&priv->mutex);

    priv->status |= STATUS_EXIT_PENDING;
    ipw_down(priv);
    sysfs_remove_group(&pdev->dev.kobj, &ipw_attribute_group);

    mutex_unlock(&priv->mutex);

    unregister_netdev(priv->net_dev);

    if (priv->rxq) {
        ipw_rx_queue_free(priv, priv->rxq);
        priv->rxq = NULL;
    }
    ipw_tx_queue_free(priv);

    if (priv->cmdlog) {
        kfree(priv->cmdlog);
        priv->cmdlog = NULL;
    }

    /* make sure all works are inactive */
    cancel_delayed_work_sync(&priv->adhoc_check);
    cancel_work_sync(&priv->associate);
    cancel_work_sync(&priv->disassociate);
    cancel_work_sync(&priv->system_config);
    cancel_work_sync(&priv->rx_replenish);
    cancel_work_sync(&priv->adapter_restart);
    cancel_delayed_work_sync(&priv->rf_kill);
    cancel_work_sync(&priv->up);
    cancel_work_sync(&priv->down);
    cancel_delayed_work_sync(&priv->request_scan);
    cancel_delayed_work_sync(&priv->request_direct_scan);
    cancel_delayed_work_sync(&priv->request_passive_scan);
    cancel_delayed_work_sync(&priv->scan_event);
    cancel_delayed_work_sync(&priv->gather_stats);
    cancel_work_sync(&priv->abort_scan);
    cancel_work_sync(&priv->roam);
    cancel_delayed_work_sync(&priv->scan_check);
    cancel_work_sync(&priv->link_up);
    cancel_work_sync(&priv->link_down);
    cancel_delayed_work_sync(&priv->led_link_on);
    cancel_delayed_work_sync(&priv->led_link_off);
    cancel_delayed_work_sync(&priv->led_act_off);
    cancel_work_sync(&priv->merge_networks);

    /* Free MAC hash list for ADHOC */
    for (i = 0; i < IPW_IBSS_MAC_HASH_SIZE; i++) {
        list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
            list_del(p);
            kfree(list_entry(p, struct ipw_ibss_seq, list));
        }
    }

    kfree(priv->error);
    priv->error = NULL;

#ifdef CONFIG_IPW2200_PROMISCUOUS
    ipw_prom_free(priv);
#endif

    free_irq(pdev->irq, priv);
    iounmap(priv->hw_base);
    pci_release_regions(pdev);
    pci_disable_device(pdev);
    pci_set_drvdata(pdev, NULL);
    /* wiphy_unregister needs to be here, before free_libipw */
    wiphy_unregister(priv->ieee->wdev.wiphy);
    kfree(priv->ieee->a_band.channels);
    kfree(priv->ieee->bg_band.channels);
    free_libipw(priv->net_dev, 0);
    free_firmware();
}

#ifdef CONFIG_PM
static int ipw_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
    struct ipw_priv *priv = pci_get_drvdata(pdev);
    struct net_device *dev = priv->net_dev;

    printk(KERN_INFO "%s: Going into suspend...\n", dev->name);

    /* Take down the device; powers it off, etc. */
    ipw_down(priv);

    /* Remove the PRESENT state of the device */
    netif_device_detach(dev);

    pci_save_state(pdev);
    pci_disable_device(pdev);
    pci_set_power_state(pdev, pci_choose_state(pdev, state));

    priv->suspend_at = get_seconds();

    return 0;
}

static int ipw_pci_resume(struct pci_dev *pdev)
{
    struct ipw_priv *priv = pci_get_drvdata(pdev);
    struct net_device *dev = priv->net_dev;
    int err;
    u32 val;

    printk(KERN_INFO "%s: Coming out of suspend...\n", dev->name);

    pci_set_power_state(pdev, PCI_D0);
    err = pci_enable_device(pdev);
    if (err) {
        printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
               dev->name);
        return err;
    }
    pci_restore_state(pdev);

    /*
     * Suspend/Resume resets the PCI configuration space, so we have to
     * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
     * from interfering with C3 CPU state. pci_restore_state won't help
     * here since it only restores the first 64 bytes pci config header.
     */
    pci_read_config_dword(pdev, 0x40, &val);
    if ((val & 0x0000ff00) != 0)
        pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);

    /* Set the device back into the PRESENT state; this will also wake
     * the queue of needed */
    netif_device_attach(dev);

    priv->suspend_time = get_seconds() - priv->suspend_at;

    /* Bring the device back up */
    schedule_work(&priv->up);

    return 0;
}
#endif

static void ipw_pci_shutdown(struct pci_dev *pdev)
{
    struct ipw_priv *priv = pci_get_drvdata(pdev);

    /* Take down the device; powers it off, etc. */
    ipw_down(priv);

    pci_disable_device(pdev);
}

/* driver initialization stuff */
static struct pci_driver ipw_driver = {
    .name = DRV_NAME,
    .id_table = card_ids,
    .probe = ipw_pci_probe,
    .remove = __devexit_p(ipw_pci_remove),
#ifdef CONFIG_PM
    .suspend = ipw_pci_suspend,
    .resume = ipw_pci_resume,
#endif
    .shutdown = ipw_pci_shutdown,
};

static int __init ipw_init(void)
{
    int ret;

    printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
    printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");

    ret = pci_register_driver(&ipw_driver);
    if (ret) {
        IPW_ERROR("Unable to initialize PCI module\n");
        return ret;
    }

    ret = driver_create_file(&ipw_driver.driver, &driver_attr_debug_level);
    if (ret) {
        IPW_ERROR("Unable to create driver sysfs file\n");
        pci_unregister_driver(&ipw_driver);
        return ret;
    }

    return ret;
}

static void __exit ipw_exit(void)
{
    driver_remove_file(&ipw_driver.driver, &driver_attr_debug_level);
    pci_unregister_driver(&ipw_driver);
}

module_param(disable, int, 0444);
MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");

module_param(associate, int, 0444);
MODULE_PARM_DESC(associate, "auto associate when scanning (default off)");

module_param(auto_create, int, 0444);
MODULE_PARM_DESC(auto_create, "auto create adhoc network (default on)");

module_param_named(led, led_support, int, 0444);
MODULE_PARM_DESC(led, "enable led control on some systems (default 1 on)");

module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");

module_param_named(channel, default_channel, int, 0444);
MODULE_PARM_DESC(channel, "channel to limit associate to (default 0 [ANY])");

#ifdef CONFIG_IPW2200_PROMISCUOUS
module_param(rtap_iface, int, 0444);
MODULE_PARM_DESC(rtap_iface, "create the rtap interface (1 - create, default 0)");
#endif

#ifdef CONFIG_IPW2200_QOS
module_param(qos_enable, int, 0444);
MODULE_PARM_DESC(qos_enable, "enable all QoS functionalitis");

module_param(qos_burst_enable, int, 0444);
MODULE_PARM_DESC(qos_burst_enable, "enable QoS burst mode");

module_param(qos_no_ack_mask, int, 0444);
MODULE_PARM_DESC(qos_no_ack_mask, "mask Tx_Queue to no ack");

module_param(burst_duration_CCK, int, 0444);
MODULE_PARM_DESC(burst_duration_CCK, "set CCK burst value");

module_param(burst_duration_OFDM, int, 0444);
MODULE_PARM_DESC(burst_duration_OFDM, "set OFDM burst value");
#endif              /* CONFIG_IPW2200_QOS */

#ifdef CONFIG_IPW2200_MONITOR
module_param_named(mode, network_mode, int, 0444);
MODULE_PARM_DESC(mode, "network mode (0=BSS,1=IBSS,2=Monitor)");
#else
module_param_named(mode, network_mode, int, 0444);
MODULE_PARM_DESC(mode, "network mode (0=BSS,1=IBSS)");
#endif

module_param(bt_coexist, int, 0444);
MODULE_PARM_DESC(bt_coexist, "enable bluetooth coexistence (default off)");

module_param(hwcrypto, int, 0444);
MODULE_PARM_DESC(hwcrypto, "enable hardware crypto (default off)");

module_param(cmdlog, int, 0444);
MODULE_PARM_DESC(cmdlog,
         "allocate a ring buffer for logging firmware commands");

module_param(roaming, int, 0444);
MODULE_PARM_DESC(roaming, "enable roaming support (default on)");

module_param(antenna, int, 0444);
MODULE_PARM_DESC(antenna, "select antenna 1=Main, 3=Aux, default 0 [both], 2=slow_diversity (choose the one with lower background noise)");

module_exit(ipw_exit);
module_init(ipw_init);