devices.c

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/******************************************************************************
 *
 * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, 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
 *
 *****************************************************************************/

/*
 * DVM device-specific data & functions
 */
#include "iwl-io.h"
#include "iwl-prph.h"
#include "iwl-eeprom-parse.h"

#include "agn.h"
#include "dev.h"
#include "commands.h"


/*
 * 1000 series
 * ===========
 */

/*
 * For 1000, use advance thermal throttling critical temperature threshold,
 * but legacy thermal management implementation for now.
 * This is for the reason of 1000 uCode using advance thermal throttling API
 * but not implement ct_kill_exit based on ct_kill exit temperature
 * so the thermal throttling will still based on legacy thermal throttling
 * management.
 * The code here need to be modified once 1000 uCode has the advanced thermal
 * throttling algorithm in place
 */
static void iwl1000_set_ct_threshold(struct iwl_priv *priv)
{
    /* want Celsius */
    priv->hw_params.ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
    priv->hw_params.ct_kill_exit_threshold = CT_KILL_EXIT_THRESHOLD;
}

/* NIC configuration for 1000 series */
static void iwl1000_nic_config(struct iwl_priv *priv)
{
    /* Setting digital SVR for 1000 card to 1.32V */
    /* locking is acquired in iwl_set_bits_mask_prph() function */
    iwl_set_bits_mask_prph(priv->trans, APMG_DIGITAL_SVR_REG,
                APMG_SVR_DIGITAL_VOLTAGE_1_32,
                ~APMG_SVR_VOLTAGE_CONFIG_BIT_MSK);
}

static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
                       u16 tsf_bits)
{
    return (1 << tsf_bits) - 1;
}

static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
                        u16 tsf_bits)
{
    return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
}

/*
 * extended beacon time format
 * time in usec will be changed into a 32-bit value in extended:internal format
 * the extended part is the beacon counts
 * the internal part is the time in usec within one beacon interval
 */
static u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec,
                u32 beacon_interval)
{
    u32 quot;
    u32 rem;
    u32 interval = beacon_interval * TIME_UNIT;

    if (!interval || !usec)
        return 0;

    quot = (usec / interval) &
        (iwl_beacon_time_mask_high(priv, IWLAGN_EXT_BEACON_TIME_POS) >>
        IWLAGN_EXT_BEACON_TIME_POS);
    rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
                   IWLAGN_EXT_BEACON_TIME_POS);

    return (quot << IWLAGN_EXT_BEACON_TIME_POS) + rem;
}

/* base is usually what we get from ucode with each received frame,
 * the same as HW timer counter counting down
 */
static __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
               u32 addon, u32 beacon_interval)
{
    u32 base_low = base & iwl_beacon_time_mask_low(priv,
                IWLAGN_EXT_BEACON_TIME_POS);
    u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
                IWLAGN_EXT_BEACON_TIME_POS);
    u32 interval = beacon_interval * TIME_UNIT;
    u32 res = (base & iwl_beacon_time_mask_high(priv,
                IWLAGN_EXT_BEACON_TIME_POS)) +
                (addon & iwl_beacon_time_mask_high(priv,
                IWLAGN_EXT_BEACON_TIME_POS));

    if (base_low > addon_low)
        res += base_low - addon_low;
    else if (base_low < addon_low) {
        res += interval + base_low - addon_low;
        res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
    } else
        res += (1 << IWLAGN_EXT_BEACON_TIME_POS);

    return cpu_to_le32(res);
}

static const struct iwl_sensitivity_ranges iwl1000_sensitivity = {
    .min_nrg_cck = 95,
    .auto_corr_min_ofdm = 90,
    .auto_corr_min_ofdm_mrc = 170,
    .auto_corr_min_ofdm_x1 = 120,
    .auto_corr_min_ofdm_mrc_x1 = 240,

    .auto_corr_max_ofdm = 120,
    .auto_corr_max_ofdm_mrc = 210,
    .auto_corr_max_ofdm_x1 = 155,
    .auto_corr_max_ofdm_mrc_x1 = 290,

    .auto_corr_min_cck = 125,
    .auto_corr_max_cck = 200,
    .auto_corr_min_cck_mrc = 170,
    .auto_corr_max_cck_mrc = 400,
    .nrg_th_cck = 95,
    .nrg_th_ofdm = 95,

    .barker_corr_th_min = 190,
    .barker_corr_th_min_mrc = 390,
    .nrg_th_cca = 62,
};

static void iwl1000_hw_set_hw_params(struct iwl_priv *priv)
{
    iwl1000_set_ct_threshold(priv);

    /* Set initial sensitivity parameters */
    priv->hw_params.sens = &iwl1000_sensitivity;
}

struct iwl_lib_ops iwl1000_lib = {
    .set_hw_params = iwl1000_hw_set_hw_params,
    .nic_config = iwl1000_nic_config,
    .temperature = iwlagn_temperature,
};


/*
 * 2000 series
 * ===========
 */

static void iwl2000_set_ct_threshold(struct iwl_priv *priv)
{
    /* want Celsius */
    priv->hw_params.ct_kill_threshold = CT_KILL_THRESHOLD;
    priv->hw_params.ct_kill_exit_threshold = CT_KILL_EXIT_THRESHOLD;
}

/* NIC configuration for 2000 series */
static void iwl2000_nic_config(struct iwl_priv *priv)
{
    iwl_set_bit(priv->trans, CSR_GP_DRIVER_REG,
            CSR_GP_DRIVER_REG_BIT_RADIO_IQ_INVER);
}

static const struct iwl_sensitivity_ranges iwl2000_sensitivity = {
    .min_nrg_cck = 97,
    .auto_corr_min_ofdm = 80,
    .auto_corr_min_ofdm_mrc = 128,
    .auto_corr_min_ofdm_x1 = 105,
    .auto_corr_min_ofdm_mrc_x1 = 192,

    .auto_corr_max_ofdm = 145,
    .auto_corr_max_ofdm_mrc = 232,
    .auto_corr_max_ofdm_x1 = 110,
    .auto_corr_max_ofdm_mrc_x1 = 232,

    .auto_corr_min_cck = 125,
    .auto_corr_max_cck = 175,
    .auto_corr_min_cck_mrc = 160,
    .auto_corr_max_cck_mrc = 310,
    .nrg_th_cck = 97,
    .nrg_th_ofdm = 100,

    .barker_corr_th_min = 190,
    .barker_corr_th_min_mrc = 390,
    .nrg_th_cca = 62,
};

static void iwl2000_hw_set_hw_params(struct iwl_priv *priv)
{
    iwl2000_set_ct_threshold(priv);

    /* Set initial sensitivity parameters */
    priv->hw_params.sens = &iwl2000_sensitivity;
}

struct iwl_lib_ops iwl2000_lib = {
    .set_hw_params = iwl2000_hw_set_hw_params,
    .nic_config = iwl2000_nic_config,
    .temperature = iwlagn_temperature,
};

struct iwl_lib_ops iwl2030_lib = {
    .set_hw_params = iwl2000_hw_set_hw_params,
    .nic_config = iwl2000_nic_config,
    .temperature = iwlagn_temperature,
};

/*
 * 5000 series
 * ===========
 */

/* NIC configuration for 5000 series */
static const struct iwl_sensitivity_ranges iwl5000_sensitivity = {
    .min_nrg_cck = 100,
    .auto_corr_min_ofdm = 90,
    .auto_corr_min_ofdm_mrc = 170,
    .auto_corr_min_ofdm_x1 = 105,
    .auto_corr_min_ofdm_mrc_x1 = 220,

    .auto_corr_max_ofdm = 120,
    .auto_corr_max_ofdm_mrc = 210,
    .auto_corr_max_ofdm_x1 = 120,
    .auto_corr_max_ofdm_mrc_x1 = 240,

    .auto_corr_min_cck = 125,
    .auto_corr_max_cck = 200,
    .auto_corr_min_cck_mrc = 200,
    .auto_corr_max_cck_mrc = 400,
    .nrg_th_cck = 100,
    .nrg_th_ofdm = 100,

    .barker_corr_th_min = 190,
    .barker_corr_th_min_mrc = 390,
    .nrg_th_cca = 62,
};

static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
    .min_nrg_cck = 95,
    .auto_corr_min_ofdm = 90,
    .auto_corr_min_ofdm_mrc = 170,
    .auto_corr_min_ofdm_x1 = 105,
    .auto_corr_min_ofdm_mrc_x1 = 220,

    .auto_corr_max_ofdm = 120,
    .auto_corr_max_ofdm_mrc = 210,
    /* max = min for performance bug in 5150 DSP */
    .auto_corr_max_ofdm_x1 = 105,
    .auto_corr_max_ofdm_mrc_x1 = 220,

    .auto_corr_min_cck = 125,
    .auto_corr_max_cck = 200,
    .auto_corr_min_cck_mrc = 170,
    .auto_corr_max_cck_mrc = 400,
    .nrg_th_cck = 95,
    .nrg_th_ofdm = 95,

    .barker_corr_th_min = 190,
    .barker_corr_th_min_mrc = 390,
    .nrg_th_cca = 62,
};

#define IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF   (-5)

static s32 iwl_temp_calib_to_offset(struct iwl_priv *priv)
{
    u16 temperature, voltage;

    temperature = le16_to_cpu(priv->eeprom_data->kelvin_temperature);
    voltage = le16_to_cpu(priv->eeprom_data->kelvin_voltage);

    /* offset = temp - volt / coeff */
    return (s32)(temperature -
            voltage / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF);
}

static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
{
    const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
    s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
            iwl_temp_calib_to_offset(priv);

    priv->hw_params.ct_kill_threshold = threshold * volt2temp_coef;
}

static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
{
    /* want Celsius */
    priv->hw_params.ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
}

static void iwl5000_hw_set_hw_params(struct iwl_priv *priv)
{
    iwl5000_set_ct_threshold(priv);

    /* Set initial sensitivity parameters */
    priv->hw_params.sens = &iwl5000_sensitivity;
}

static void iwl5150_hw_set_hw_params(struct iwl_priv *priv)
{
    iwl5150_set_ct_threshold(priv);

    /* Set initial sensitivity parameters */
    priv->hw_params.sens = &iwl5150_sensitivity;
}

static void iwl5150_temperature(struct iwl_priv *priv)
{
    u32 vt = 0;
    s32 offset =  iwl_temp_calib_to_offset(priv);

    vt = le32_to_cpu(priv->statistics.common.temperature);
    vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
    /* now vt hold the temperature in Kelvin */
    priv->temperature = KELVIN_TO_CELSIUS(vt);
    iwl_tt_handler(priv);
}

static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
                     struct ieee80211_channel_switch *ch_switch)
{
    /*
     * MULTI-FIXME
     * See iwlagn_mac_channel_switch.
     */
    struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
    struct iwl5000_channel_switch_cmd cmd;
    u32 switch_time_in_usec, ucode_switch_time;
    u16 ch;
    u32 tsf_low;
    u8 switch_count;
    u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
    struct ieee80211_vif *vif = ctx->vif;
    struct iwl_host_cmd hcmd = {
        .id = REPLY_CHANNEL_SWITCH,
        .len = { sizeof(cmd), },
        .flags = CMD_SYNC,
        .data = { &cmd, },
    };

    cmd.band = priv->band == IEEE80211_BAND_2GHZ;
    ch = ch_switch->channel->hw_value;
    IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
              ctx->active.channel, ch);
    cmd.channel = cpu_to_le16(ch);
    cmd.rxon_flags = ctx->staging.flags;
    cmd.rxon_filter_flags = ctx->staging.filter_flags;
    switch_count = ch_switch->count;
    tsf_low = ch_switch->timestamp & 0x0ffffffff;
    /*
     * calculate the ucode channel switch time
     * adding TSF as one of the factor for when to switch
     */
    if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
        if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
            beacon_interval)) {
            switch_count -= (priv->ucode_beacon_time -
                tsf_low) / beacon_interval;
        } else
            switch_count = 0;
    }
    if (switch_count <= 1)
        cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
    else {
        switch_time_in_usec =
            vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
        ucode_switch_time = iwl_usecs_to_beacons(priv,
                             switch_time_in_usec,
                             beacon_interval);
        cmd.switch_time = iwl_add_beacon_time(priv,
                              priv->ucode_beacon_time,
                              ucode_switch_time,
                              beacon_interval);
    }
    IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
              cmd.switch_time);
    cmd.expect_beacon = ch_switch->channel->flags & IEEE80211_CHAN_RADAR;

    return iwl_dvm_send_cmd(priv, &hcmd);
}

struct iwl_lib_ops iwl5000_lib = {
    .set_hw_params = iwl5000_hw_set_hw_params,
    .set_channel_switch = iwl5000_hw_channel_switch,
    .temperature = iwlagn_temperature,
};

struct iwl_lib_ops iwl5150_lib = {
    .set_hw_params = iwl5150_hw_set_hw_params,
    .set_channel_switch = iwl5000_hw_channel_switch,
    .temperature = iwl5150_temperature,
};



/*
 * 6000 series
 * ===========
 */

static void iwl6000_set_ct_threshold(struct iwl_priv *priv)
{
    /* want Celsius */
    priv->hw_params.ct_kill_threshold = CT_KILL_THRESHOLD;
    priv->hw_params.ct_kill_exit_threshold = CT_KILL_EXIT_THRESHOLD;
}

/* NIC configuration for 6000 series */
static void iwl6000_nic_config(struct iwl_priv *priv)
{
    switch (priv->cfg->device_family) {
    case IWL_DEVICE_FAMILY_6005:
    case IWL_DEVICE_FAMILY_6030:
    case IWL_DEVICE_FAMILY_6000:
        break;
    case IWL_DEVICE_FAMILY_6000i:
        /* 2x2 IPA phy type */
        iwl_write32(priv->trans, CSR_GP_DRIVER_REG,
                 CSR_GP_DRIVER_REG_BIT_RADIO_SKU_2x2_IPA);
        break;
    case IWL_DEVICE_FAMILY_6050:
        /* Indicate calibration version to uCode. */
        if (priv->eeprom_data->calib_version >= 6)
            iwl_set_bit(priv->trans, CSR_GP_DRIVER_REG,
                    CSR_GP_DRIVER_REG_BIT_CALIB_VERSION6);
        break;
    case IWL_DEVICE_FAMILY_6150:
        /* Indicate calibration version to uCode. */
        if (priv->eeprom_data->calib_version >= 6)
            iwl_set_bit(priv->trans, CSR_GP_DRIVER_REG,
                    CSR_GP_DRIVER_REG_BIT_CALIB_VERSION6);
        iwl_set_bit(priv->trans, CSR_GP_DRIVER_REG,
                CSR_GP_DRIVER_REG_BIT_6050_1x2);
        break;
    default:
        WARN_ON(1);
    }
}

static const struct iwl_sensitivity_ranges iwl6000_sensitivity = {
    .min_nrg_cck = 110,
    .auto_corr_min_ofdm = 80,
    .auto_corr_min_ofdm_mrc = 128,
    .auto_corr_min_ofdm_x1 = 105,
    .auto_corr_min_ofdm_mrc_x1 = 192,

    .auto_corr_max_ofdm = 145,
    .auto_corr_max_ofdm_mrc = 232,
    .auto_corr_max_ofdm_x1 = 110,
    .auto_corr_max_ofdm_mrc_x1 = 232,

    .auto_corr_min_cck = 125,
    .auto_corr_max_cck = 175,
    .auto_corr_min_cck_mrc = 160,
    .auto_corr_max_cck_mrc = 310,
    .nrg_th_cck = 110,
    .nrg_th_ofdm = 110,

    .barker_corr_th_min = 190,
    .barker_corr_th_min_mrc = 336,
    .nrg_th_cca = 62,
};

static void iwl6000_hw_set_hw_params(struct iwl_priv *priv)
{
    iwl6000_set_ct_threshold(priv);

    /* Set initial sensitivity parameters */
    priv->hw_params.sens = &iwl6000_sensitivity;

}

static int iwl6000_hw_channel_switch(struct iwl_priv *priv,
                     struct ieee80211_channel_switch *ch_switch)
{
    /*
     * MULTI-FIXME
     * See iwlagn_mac_channel_switch.
     */
    struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
    struct iwl6000_channel_switch_cmd *cmd;
    u32 switch_time_in_usec, ucode_switch_time;
    u16 ch;
    u32 tsf_low;
    u8 switch_count;
    u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
    struct ieee80211_vif *vif = ctx->vif;
    struct iwl_host_cmd hcmd = {
        .id = REPLY_CHANNEL_SWITCH,
        .len = { sizeof(*cmd), },
        .flags = CMD_SYNC,
        .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
    };
    int err;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd)
        return -ENOMEM;

    hcmd.data[0] = cmd;

    cmd->band = priv->band == IEEE80211_BAND_2GHZ;
    ch = ch_switch->channel->hw_value;
    IWL_DEBUG_11H(priv, "channel switch from %u to %u\n",
              ctx->active.channel, ch);
    cmd->channel = cpu_to_le16(ch);
    cmd->rxon_flags = ctx->staging.flags;
    cmd->rxon_filter_flags = ctx->staging.filter_flags;
    switch_count = ch_switch->count;
    tsf_low = ch_switch->timestamp & 0x0ffffffff;
    /*
     * calculate the ucode channel switch time
     * adding TSF as one of the factor for when to switch
     */
    if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
        if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
            beacon_interval)) {
            switch_count -= (priv->ucode_beacon_time -
                tsf_low) / beacon_interval;
        } else
            switch_count = 0;
    }
    if (switch_count <= 1)
        cmd->switch_time = cpu_to_le32(priv->ucode_beacon_time);
    else {
        switch_time_in_usec =
            vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
        ucode_switch_time = iwl_usecs_to_beacons(priv,
                             switch_time_in_usec,
                             beacon_interval);
        cmd->switch_time = iwl_add_beacon_time(priv,
                               priv->ucode_beacon_time,
                               ucode_switch_time,
                               beacon_interval);
    }
    IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
              cmd->switch_time);
    cmd->expect_beacon = ch_switch->channel->flags & IEEE80211_CHAN_RADAR;

    err = iwl_dvm_send_cmd(priv, &hcmd);
    kfree(cmd);
    return err;
}

struct iwl_lib_ops iwl6000_lib = {
    .set_hw_params = iwl6000_hw_set_hw_params,
    .set_channel_switch = iwl6000_hw_channel_switch,
    .nic_config = iwl6000_nic_config,
    .temperature = iwlagn_temperature,
};

struct iwl_lib_ops iwl6030_lib = {
    .set_hw_params = iwl6000_hw_set_hw_params,
    .set_channel_switch = iwl6000_hw_channel_switch,
    .nic_config = iwl6000_nic_config,
    .temperature = iwlagn_temperature,
};