fwio.c

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/*
 * Firmware I/O code for mac80211 Prism54 drivers
 *
 * Copyright (c) 2006, Michael Wu <[email protected]>
 * Copyright (c) 2007-2009, Christian Lamparter <[email protected]>
 * Copyright 2008, Johannes Berg <[email protected]>
 *
 * Based on:
 * - the islsm (softmac prism54) driver, which is:
 *   Copyright 2004-2006 Jean-Baptiste Note <[email protected]>, et al.
 * - stlc45xx driver
 *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/export.h>

#include <net/mac80211.h>

#include "p54.h"
#include "eeprom.h"
#include "lmac.h"

int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
{
    struct p54_common *priv = dev->priv;
    struct exp_if *exp_if;
    struct bootrec *bootrec;
    u32 *data = (u32 *)fw->data;
    u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
    u8 *fw_version = NULL;
    size_t len;
    int i;
    int maxlen;

    if (priv->rx_start)
        return 0;

    while (data < end_data && *data)
        data++;

    while (data < end_data && !*data)
        data++;

    bootrec = (struct bootrec *) data;

    while (bootrec->data <= end_data && (bootrec->data +
           (len = le32_to_cpu(bootrec->len))) <= end_data) {
        u32 code = le32_to_cpu(bootrec->code);
        switch (code) {
        case BR_CODE_COMPONENT_ID:
            priv->fw_interface = be32_to_cpup((__be32 *)
                         bootrec->data);
            switch (priv->fw_interface) {
            case FW_LM86:
            case FW_LM20:
            case FW_LM87: {
                char *iftype = (char *)bootrec->data;
                wiphy_info(priv->hw->wiphy,
                       "p54 detected a LM%c%c firmware\n",
                       iftype[2], iftype[3]);
                break;
                }
            case FW_FMAC:
            default:
                wiphy_err(priv->hw->wiphy,
                      "unsupported firmware\n");
                return -ENODEV;
            }
            break;
        case BR_CODE_COMPONENT_VERSION:
            /* 24 bytes should be enough for all firmwares */
            if (strnlen((unsigned char *) bootrec->data, 24) < 24)
                fw_version = (unsigned char *) bootrec->data;
            break;
        case BR_CODE_DESCR: {
            struct bootrec_desc *desc =
                (struct bootrec_desc *)bootrec->data;
            priv->rx_start = le32_to_cpu(desc->rx_start);
            /* FIXME add sanity checking */
            priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
            priv->headroom = desc->headroom;
            priv->tailroom = desc->tailroom;
            priv->privacy_caps = desc->privacy_caps;
            priv->rx_keycache_size = desc->rx_keycache_size;
            if (le32_to_cpu(bootrec->len) == 11)
                priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
            else
                priv->rx_mtu = (size_t)
                    0x620 - priv->tx_hdr_len;
            maxlen = priv->tx_hdr_len + /* USB devices */
                 sizeof(struct p54_rx_data) +
                 4 + /* rx alignment */
                 IEEE80211_MAX_FRAG_THRESHOLD;
            if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) {
                printk(KERN_INFO "p54: rx_mtu reduced from %d "
                       "to %d\n", priv->rx_mtu, maxlen);
                priv->rx_mtu = maxlen;
            }
            break;
            }
        case BR_CODE_EXPOSED_IF:
            exp_if = (struct exp_if *) bootrec->data;
            for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
                if (exp_if[i].if_id == cpu_to_le16(IF_ID_LMAC))
                    priv->fw_var = le16_to_cpu(exp_if[i].variant);
            break;
        case BR_CODE_DEPENDENT_IF:
            break;
        case BR_CODE_END_OF_BRA:
        case LEGACY_BR_CODE_END_OF_BRA:
            end_data = NULL;
            break;
        default:
            break;
        }
        bootrec = (struct bootrec *)&bootrec->data[len];
    }

    if (fw_version) {
        wiphy_info(priv->hw->wiphy,
               "FW rev %s - Softmac protocol %x.%x\n",
               fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
        snprintf(dev->wiphy->fw_version, sizeof(dev->wiphy->fw_version),
                "%s - %x.%x", fw_version,
                priv->fw_var >> 8, priv->fw_var & 0xff);
    }

    if (priv->fw_var < 0x500)
        wiphy_info(priv->hw->wiphy,
               "you are using an obsolete firmware. "
               "visit http://wireless.kernel.org/en/users/Drivers/p54 "
               "and grab one for \"kernel >= 2.6.28\"!\n");

    if (priv->fw_var >= 0x300) {
        /* Firmware supports QoS, use it! */

        if (priv->fw_var >= 0x500) {
            priv->tx_stats[P54_QUEUE_AC_VO].limit = 16;
            priv->tx_stats[P54_QUEUE_AC_VI].limit = 16;
            priv->tx_stats[P54_QUEUE_AC_BE].limit = 16;
            priv->tx_stats[P54_QUEUE_AC_BK].limit = 16;
        } else {
            priv->tx_stats[P54_QUEUE_AC_VO].limit = 3;
            priv->tx_stats[P54_QUEUE_AC_VI].limit = 4;
            priv->tx_stats[P54_QUEUE_AC_BE].limit = 3;
            priv->tx_stats[P54_QUEUE_AC_BK].limit = 2;
        }
        priv->hw->queues = P54_QUEUE_AC_NUM;
    }

    wiphy_info(priv->hw->wiphy,
           "cryptographic accelerator WEP:%s, TKIP:%s, CCMP:%s\n",
           (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" : "no",
           (priv->privacy_caps &
            (BR_DESC_PRIV_CAP_TKIP | BR_DESC_PRIV_CAP_MICHAEL))
           ? "YES" : "no",
           (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)
           ? "YES" : "no");

    if (priv->rx_keycache_size) {
        /*
         * NOTE:
         *
         * The firmware provides at most 255 (0 - 254) slots
         * for keys which are then used to offload decryption.
         * As a result the 255 entry (aka 0xff) can be used
         * safely by the driver to mark keys that didn't fit
         * into the full cache. This trick saves us from
         * keeping a extra list for uploaded keys.
         */

        priv->used_rxkeys = kzalloc(BITS_TO_LONGS(
            priv->rx_keycache_size), GFP_KERNEL);

        if (!priv->used_rxkeys)
            return -ENOMEM;
    }

    return 0;
}
EXPORT_SYMBOL_GPL(p54_parse_firmware);

static struct sk_buff *p54_alloc_skb(struct p54_common *priv, u16 hdr_flags,
                     u16 payload_len, u16 type, gfp_t memflags)
{
    struct p54_hdr *hdr;
    struct sk_buff *skb;
    size_t frame_len = sizeof(*hdr) + payload_len;

    if (frame_len > P54_MAX_CTRL_FRAME_LEN)
        return NULL;

    if (unlikely(skb_queue_len(&priv->tx_pending) > 64))
        return NULL;

    skb = __dev_alloc_skb(priv->tx_hdr_len + frame_len, memflags);
    if (!skb)
        return NULL;
    skb_reserve(skb, priv->tx_hdr_len);

    hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
    hdr->flags = cpu_to_le16(hdr_flags);
    hdr->len = cpu_to_le16(payload_len);
    hdr->type = cpu_to_le16(type);
    hdr->tries = hdr->rts_tries = 0;
    return skb;
}

int p54_download_eeprom(struct p54_common *priv, void *buf,
            u16 offset, u16 len)
{
    struct p54_eeprom_lm86 *eeprom_hdr;
    struct sk_buff *skb;
    size_t eeprom_hdr_size;
    int ret = 0;

    if (priv->fw_var >= 0x509)
        eeprom_hdr_size = sizeof(*eeprom_hdr);
    else
        eeprom_hdr_size = 0x4;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL, eeprom_hdr_size +
                len, P54_CONTROL_TYPE_EEPROM_READBACK,
                GFP_KERNEL);
    if (unlikely(!skb))
        return -ENOMEM;

    mutex_lock(&priv->eeprom_mutex);
    priv->eeprom = buf;
    eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
        eeprom_hdr_size + len);

    if (priv->fw_var < 0x509) {
        eeprom_hdr->v1.offset = cpu_to_le16(offset);
        eeprom_hdr->v1.len = cpu_to_le16(len);
    } else {
        eeprom_hdr->v2.offset = cpu_to_le32(offset);
        eeprom_hdr->v2.len = cpu_to_le16(len);
        eeprom_hdr->v2.magic2 = 0xf;
        memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4);
    }

    p54_tx(priv, skb);

    if (!wait_for_completion_interruptible_timeout(
         &priv->eeprom_comp, HZ)) {
        wiphy_err(priv->hw->wiphy, "device does not respond!\n");
        ret = -EBUSY;
    }
    priv->eeprom = NULL;
    mutex_unlock(&priv->eeprom_mutex);
    return ret;
}

int p54_update_beacon_tim(struct p54_common *priv, u16 aid, bool set)
{
    struct sk_buff *skb;
    struct p54_tim *tim;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*tim),
                P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
    if (unlikely(!skb))
        return -ENOMEM;

    tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
    tim->count = 1;
    tim->entry[0] = cpu_to_le16(set ? (aid | 0x8000) : aid);
    p54_tx(priv, skb);
    return 0;
}

int p54_sta_unlock(struct p54_common *priv, u8 *addr)
{
    struct sk_buff *skb;
    struct p54_sta_unlock *sta;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*sta),
                P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
    if (unlikely(!skb))
        return -ENOMEM;

    sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
    memcpy(sta->addr, addr, ETH_ALEN);
    p54_tx(priv, skb);
    return 0;
}

int p54_tx_cancel(struct p54_common *priv, __le32 req_id)
{
    struct sk_buff *skb;
    struct p54_txcancel *cancel;
    u32 _req_id = le32_to_cpu(req_id);

    if (unlikely(_req_id < priv->rx_start || _req_id > priv->rx_end))
        return -EINVAL;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*cancel),
                P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
    if (unlikely(!skb))
        return -ENOMEM;

    cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
    cancel->req_id = req_id;
    p54_tx(priv, skb);
    return 0;
}

int p54_setup_mac(struct p54_common *priv)
{
    struct sk_buff *skb;
    struct p54_setup_mac *setup;
    u16 mode;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup),
                P54_CONTROL_TYPE_SETUP, GFP_ATOMIC);
    if (!skb)
        return -ENOMEM;

    setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
    if (!(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) {
        switch (priv->mode) {
        case NL80211_IFTYPE_STATION:
            mode = P54_FILTER_TYPE_STATION;
            break;
        case NL80211_IFTYPE_AP:
            mode = P54_FILTER_TYPE_AP;
            break;
        case NL80211_IFTYPE_ADHOC:
        case NL80211_IFTYPE_MESH_POINT:
            mode = P54_FILTER_TYPE_IBSS;
            break;
        case NL80211_IFTYPE_MONITOR:
            mode = P54_FILTER_TYPE_PROMISCUOUS;
            break;
        default:
            mode = P54_FILTER_TYPE_HIBERNATE;
            break;
        }

        /*
         * "TRANSPARENT and PROMISCUOUS are mutually exclusive"
         * STSW45X0C LMAC API - page 12
         */
        if (((priv->filter_flags & FIF_PROMISC_IN_BSS) ||
             (priv->filter_flags & FIF_OTHER_BSS)) &&
            (mode != P54_FILTER_TYPE_PROMISCUOUS))
            mode |= P54_FILTER_TYPE_TRANSPARENT;
    } else {
        mode = P54_FILTER_TYPE_HIBERNATE;
    }

    setup->mac_mode = cpu_to_le16(mode);
    memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
    memcpy(setup->bssid, priv->bssid, ETH_ALEN);
    setup->rx_antenna = 2 & priv->rx_diversity_mask; /* automatic */
    setup->rx_align = 0;
    if (priv->fw_var < 0x500) {
        setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
        memset(setup->v1.rts_rates, 0, 8);
        setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
        setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
        setup->v1.rxhw = cpu_to_le16(priv->rxhw);
        setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
        setup->v1.unalloc0 = cpu_to_le16(0);
    } else {
        setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
        setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
        setup->v2.rxhw = cpu_to_le16(priv->rxhw);
        setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
        setup->v2.truncate = cpu_to_le16(48896);
        setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
        setup->v2.sbss_offset = 0;
        setup->v2.mcast_window = 0;
        setup->v2.rx_rssi_threshold = 0;
        setup->v2.rx_ed_threshold = 0;
        setup->v2.ref_clock = cpu_to_le32(644245094);
        setup->v2.lpf_bandwidth = cpu_to_le16(65535);
        setup->v2.osc_start_delay = cpu_to_le16(65535);
    }
    p54_tx(priv, skb);
    priv->phy_idle = mode == P54_FILTER_TYPE_HIBERNATE;
    return 0;
}

int p54_scan(struct p54_common *priv, u16 mode, u16 dwell)
{
    struct sk_buff *skb;
    struct p54_hdr *hdr;
    struct p54_scan_head *head;
    struct p54_iq_autocal_entry *iq_autocal;
    union p54_scan_body_union *body;
    struct p54_scan_tail_rate *rate;
    struct pda_rssi_cal_entry *rssi;
    struct p54_rssi_db_entry *rssi_data;
    unsigned int i;
    void *entry;
    __le16 freq = cpu_to_le16(priv->hw->conf.channel->center_freq);

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*head) +
                2 + sizeof(*iq_autocal) + sizeof(*body) +
                sizeof(*rate) + 2 * sizeof(*rssi),
                P54_CONTROL_TYPE_SCAN, GFP_ATOMIC);
    if (!skb)
        return -ENOMEM;

    head = (struct p54_scan_head *) skb_put(skb, sizeof(*head));
    memset(head->scan_params, 0, sizeof(head->scan_params));
    head->mode = cpu_to_le16(mode);
    head->dwell = cpu_to_le16(dwell);
    head->freq = freq;

    if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
        __le16 *pa_power_points = (__le16 *) skb_put(skb, 2);
        *pa_power_points = cpu_to_le16(0x0c);
    }

    iq_autocal = (void *) skb_put(skb, sizeof(*iq_autocal));
    for (i = 0; i < priv->iq_autocal_len; i++) {
        if (priv->iq_autocal[i].freq != freq)
            continue;

        memcpy(iq_autocal, &priv->iq_autocal[i].params,
               sizeof(struct p54_iq_autocal_entry));
        break;
    }
    if (i == priv->iq_autocal_len)
        goto err;

    if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW)
        body = (void *) skb_put(skb, sizeof(body->longbow));
    else
        body = (void *) skb_put(skb, sizeof(body->normal));

    for (i = 0; i < priv->output_limit->entries; i++) {
        __le16 *entry_freq = (void *) (priv->output_limit->data +
                     priv->output_limit->entry_size * i);

        if (*entry_freq != freq)
            continue;

        if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
            memcpy(&body->longbow.power_limits,
                   (void *) entry_freq + sizeof(__le16),
                   priv->output_limit->entry_size);
        } else {
            struct pda_channel_output_limit *limits =
                   (void *) entry_freq;

            body->normal.val_barker = 0x38;
            body->normal.val_bpsk = body->normal.dup_bpsk =
                limits->val_bpsk;
            body->normal.val_qpsk = body->normal.dup_qpsk =
                limits->val_qpsk;
            body->normal.val_16qam = body->normal.dup_16qam =
                limits->val_16qam;
            body->normal.val_64qam = body->normal.dup_64qam =
                limits->val_64qam;
        }
        break;
    }
    if (i == priv->output_limit->entries)
        goto err;

    entry = (void *)(priv->curve_data->data + priv->curve_data->offset);
    for (i = 0; i < priv->curve_data->entries; i++) {
        if (*((__le16 *)entry) != freq) {
            entry += priv->curve_data->entry_size;
            continue;
        }

        if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
            memcpy(&body->longbow.curve_data,
                entry + sizeof(__le16),
                priv->curve_data->entry_size);
        } else {
            struct p54_scan_body *chan = &body->normal;
            struct pda_pa_curve_data *curve_data =
                (void *) priv->curve_data->data;

            entry += sizeof(__le16);
            chan->pa_points_per_curve = 8;
            memset(chan->curve_data, 0, sizeof(*chan->curve_data));
            memcpy(chan->curve_data, entry,
                   sizeof(struct p54_pa_curve_data_sample) *
                   min((u8)8, curve_data->points_per_channel));
        }
        break;
    }
    if (i == priv->curve_data->entries)
        goto err;

    if ((priv->fw_var >= 0x500) && (priv->fw_var < 0x509)) {
        rate = (void *) skb_put(skb, sizeof(*rate));
        rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
        for (i = 0; i < sizeof(rate->rts_rates); i++)
            rate->rts_rates[i] = i;
    }

    rssi = (struct pda_rssi_cal_entry *) skb_put(skb, sizeof(*rssi));
    rssi_data = p54_rssi_find(priv, le16_to_cpu(freq));
    rssi->mul = cpu_to_le16(rssi_data->mul);
    rssi->add = cpu_to_le16(rssi_data->add);
    if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
        /* Longbow frontend needs ever more */
        rssi = (void *) skb_put(skb, sizeof(*rssi));
        rssi->mul = cpu_to_le16(rssi_data->longbow_unkn);
        rssi->add = cpu_to_le16(rssi_data->longbow_unk2);
    }

    if (priv->fw_var >= 0x509) {
        rate = (void *) skb_put(skb, sizeof(*rate));
        rate->basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
        for (i = 0; i < sizeof(rate->rts_rates); i++)
            rate->rts_rates[i] = i;
    }

    hdr = (struct p54_hdr *) skb->data;
    hdr->len = cpu_to_le16(skb->len - sizeof(*hdr));

    p54_tx(priv, skb);
    priv->cur_rssi = rssi_data;
    return 0;

err:
    wiphy_err(priv->hw->wiphy, "frequency change to channel %d failed.\n",
          ieee80211_frequency_to_channel(
              priv->hw->conf.channel->center_freq));

    dev_kfree_skb_any(skb);
    return -EINVAL;
}

int p54_set_leds(struct p54_common *priv)
{
    struct sk_buff *skb;
    struct p54_led *led;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led),
                P54_CONTROL_TYPE_LED, GFP_ATOMIC);
    if (unlikely(!skb))
        return -ENOMEM;

    led = (struct p54_led *) skb_put(skb, sizeof(*led));
    led->flags = cpu_to_le16(0x0003);
    led->mask[0] = led->mask[1] = cpu_to_le16(priv->softled_state);
    led->delay[0] = cpu_to_le16(1);
    led->delay[1] = cpu_to_le16(0);
    p54_tx(priv, skb);
    return 0;
}

int p54_set_edcf(struct p54_common *priv)
{
    struct sk_buff *skb;
    struct p54_edcf *edcf;
    u8 rtd;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf),
                P54_CONTROL_TYPE_DCFINIT, GFP_ATOMIC);
    if (unlikely(!skb))
        return -ENOMEM;

    edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
    if (priv->use_short_slot) {
        edcf->slottime = 9;
        edcf->sifs = 0x10;
        edcf->eofpad = 0x00;
    } else {
        edcf->slottime = 20;
        edcf->sifs = 0x0a;
        edcf->eofpad = 0x06;
    }
    /*
     * calculate the extra round trip delay according to the
     * formula from 802.11-2007 17.3.8.6.
     */
    rtd = 3 * priv->coverage_class;
    edcf->slottime += rtd;
    edcf->round_trip_delay = cpu_to_le16(rtd);
    /* (see prism54/isl_oid.h for further details) */
    edcf->frameburst = cpu_to_le16(0);
    edcf->flags = 0;
    memset(edcf->mapping, 0, sizeof(edcf->mapping));
    memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
    p54_tx(priv, skb);
    return 0;
}

int p54_set_ps(struct p54_common *priv)
{
    struct sk_buff *skb;
    struct p54_psm *psm;
    unsigned int i;
    u16 mode;

    if (priv->hw->conf.flags & IEEE80211_CONF_PS &&
        !priv->powersave_override)
        mode = P54_PSM | P54_PSM_BEACON_TIMEOUT | P54_PSM_DTIM |
               P54_PSM_CHECKSUM | P54_PSM_MCBC;
    else
        mode = P54_PSM_CAM;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*psm),
                P54_CONTROL_TYPE_PSM, GFP_ATOMIC);
    if (!skb)
        return -ENOMEM;

    psm = (struct p54_psm *)skb_put(skb, sizeof(*psm));
    psm->mode = cpu_to_le16(mode);
    psm->aid = cpu_to_le16(priv->aid);
    for (i = 0; i < ARRAY_SIZE(psm->intervals); i++) {
        psm->intervals[i].interval =
            cpu_to_le16(priv->hw->conf.listen_interval);
        psm->intervals[i].periods = cpu_to_le16(1);
    }

    psm->beacon_rssi_skip_max = 200;
    psm->rssi_delta_threshold = 0;
    psm->nr = 1;
    psm->exclude[0] = WLAN_EID_TIM;

    p54_tx(priv, skb);
    priv->phy_ps = mode != P54_PSM_CAM;
    return 0;
}

int p54_init_xbow_synth(struct p54_common *priv)
{
    struct sk_buff *skb;
    struct p54_xbow_synth *xbow;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow),
                P54_CONTROL_TYPE_XBOW_SYNTH_CFG, GFP_KERNEL);
    if (unlikely(!skb))
        return -ENOMEM;

    xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
    xbow->magic1 = cpu_to_le16(0x1);
    xbow->magic2 = cpu_to_le16(0x2);
    xbow->freq = cpu_to_le16(5390);
    memset(xbow->padding, 0, sizeof(xbow->padding));
    p54_tx(priv, skb);
    return 0;
}

int p54_upload_key(struct p54_common *priv, u8 algo, int slot, u8 idx, u8 len,
           u8 *addr, u8* key)
{
    struct sk_buff *skb;
    struct p54_keycache *rxkey;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey),
                P54_CONTROL_TYPE_RX_KEYCACHE, GFP_KERNEL);
    if (unlikely(!skb))
        return -ENOMEM;

    rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey));
    rxkey->entry = slot;
    rxkey->key_id = idx;
    rxkey->key_type = algo;
    if (addr)
        memcpy(rxkey->mac, addr, ETH_ALEN);
    else
        memset(rxkey->mac, ~0, ETH_ALEN);

    switch (algo) {
    case P54_CRYPTO_WEP:
    case P54_CRYPTO_AESCCMP:
        rxkey->key_len = min_t(u8, 16, len);
        memcpy(rxkey->key, key, rxkey->key_len);
        break;

    case P54_CRYPTO_TKIPMICHAEL:
        rxkey->key_len = 24;
        memcpy(rxkey->key, key, 16);
        memcpy(&(rxkey->key[16]), &(key
            [NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8);
        break;

    case P54_CRYPTO_NONE:
        rxkey->key_len = 0;
        memset(rxkey->key, 0, sizeof(rxkey->key));
        break;

    default:
        wiphy_err(priv->hw->wiphy,
              "invalid cryptographic algorithm: %d\n", algo);
        dev_kfree_skb(skb);
        return -EINVAL;
    }

    p54_tx(priv, skb);
    return 0;
}

int p54_fetch_statistics(struct p54_common *priv)
{
    struct ieee80211_tx_info *txinfo;
    struct p54_tx_info *p54info;
    struct sk_buff *skb;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL,
                sizeof(struct p54_statistics),
                P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
    if (!skb)
        return -ENOMEM;

    /*
     * The statistic feedback causes some extra headaches here, if it
     * is not to crash/corrupt the firmware data structures.
     *
     * Unlike all other Control Get OIDs we can not use helpers like
     * skb_put to reserve the space for the data we're requesting.
     * Instead the extra frame length -which will hold the results later-
     * will only be told to the p54_assign_address, so that following
     * frames won't be placed into the  allegedly empty area.
     */
    txinfo = IEEE80211_SKB_CB(skb);
    p54info = (void *) txinfo->rate_driver_data;
    p54info->extra_len = sizeof(struct p54_statistics);

    p54_tx(priv, skb);
    return 0;
}

int p54_set_groupfilter(struct p54_common *priv)
{
    struct p54_group_address_table *grp;
    struct sk_buff *skb;
    bool on = false;

    skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*grp),
                P54_CONTROL_TYPE_GROUP_ADDRESS_TABLE, GFP_KERNEL);
    if (!skb)
        return -ENOMEM;

    grp = (struct p54_group_address_table *)skb_put(skb, sizeof(*grp));

    on = !(priv->filter_flags & FIF_ALLMULTI) &&
         (priv->mc_maclist_num > 0 &&
          priv->mc_maclist_num <= MC_FILTER_ADDRESS_NUM);

    if (on) {
        grp->filter_enable = cpu_to_le16(1);
        grp->num_address = cpu_to_le16(priv->mc_maclist_num);
        memcpy(grp->mac_list, priv->mc_maclist, sizeof(grp->mac_list));
    } else {
        grp->filter_enable = cpu_to_le16(0);
        grp->num_address = cpu_to_le16(0);
        memset(grp->mac_list, 0, sizeof(grp->mac_list));
    }

    p54_tx(priv, skb);
    return 0;
}