drivers/net/wireless/iwlwifi/iwl-5000.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  *  Intel Linux Wireless <ilw@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/delay.h>
  31 #include <linux/sched.h>
  32 #include <linux/skbuff.h>
  33 #include <linux/netdevice.h>
  34 #include <net/mac80211.h>
  35 #include <linux/etherdevice.h>
  36 #include <asm/unaligned.h>
  37 #include <linux/stringify.h>
  38
  39 #include "iwl-eeprom.h"
  40 #include "iwl-dev.h"
  41 #include "iwl-core.h"
  42 #include "iwl-io.h"
  43 #include "iwl-agn.h"
  44 #include "iwl-agn-hw.h"
  45 #include "iwl-trans.h"
  46 #include "iwl-shared.h"
  47 #include "iwl-cfg.h"
  48
  49 /* Highest firmware API version supported */
  50 #define IWL5000_UCODE_API_MAX 5
  51 #define IWL5150_UCODE_API_MAX 2
  52
  53 /* Lowest firmware API version supported */
  54 #define IWL5000_UCODE_API_MIN 1
  55 #define IWL5150_UCODE_API_MIN 1
  56
  57 #define IWL5000_FW_PRE "iwlwifi-5000-"
  58 #define IWL5000_MODULE_FIRMWARE(api) IWL5000_FW_PRE __stringify(api) ".ucode"
  59
  60 #define IWL5150_FW_PRE "iwlwifi-5150-"
  61 #define IWL5150_MODULE_FIRMWARE(api) IWL5150_FW_PRE __stringify(api) ".ucode"
  62
  63 /* NIC configuration for 5000 series */
  64 static void iwl5000_nic_config(struct iwl_priv *priv)
  65 {
  66         iwl_rf_config(priv);
  67
  68         /* W/A : NIC is stuck in a reset state after Early PCIe power off
  69          * (PCIe power is lost before PERST# is asserted),
  70          * causing ME FW to lose ownership and not being able to obtain it back.
  71          */
  72         iwl_set_bits_mask_prph(trans(priv), APMG_PS_CTRL_REG,
  73                                 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
  74                                 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
  75 }
  76
  77 static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
  78         .min_nrg_cck = 100,
  79         .max_nrg_cck = 0, /* not used, set to 0 */
  80         .auto_corr_min_ofdm = 90,
  81         .auto_corr_min_ofdm_mrc = 170,
  82         .auto_corr_min_ofdm_x1 = 105,
  83         .auto_corr_min_ofdm_mrc_x1 = 220,
  84
  85         .auto_corr_max_ofdm = 120,
  86         .auto_corr_max_ofdm_mrc = 210,
  87         .auto_corr_max_ofdm_x1 = 120,
  88         .auto_corr_max_ofdm_mrc_x1 = 240,
  89
  90         .auto_corr_min_cck = 125,
  91         .auto_corr_max_cck = 200,
  92         .auto_corr_min_cck_mrc = 200,
  93         .auto_corr_max_cck_mrc = 400,
  94         .nrg_th_cck = 100,
  95         .nrg_th_ofdm = 100,
  96
  97         .barker_corr_th_min = 190,
  98         .barker_corr_th_min_mrc = 390,
  99         .nrg_th_cca = 62,
 100 };
 101
 102 static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
 103         .min_nrg_cck = 95,
 104         .max_nrg_cck = 0, /* not used, set to 0 */
 105         .auto_corr_min_ofdm = 90,
 106         .auto_corr_min_ofdm_mrc = 170,
 107         .auto_corr_min_ofdm_x1 = 105,
 108         .auto_corr_min_ofdm_mrc_x1 = 220,
 109
 110         .auto_corr_max_ofdm = 120,
 111         .auto_corr_max_ofdm_mrc = 210,
 112         /* max = min for performance bug in 5150 DSP */
 113         .auto_corr_max_ofdm_x1 = 105,
 114         .auto_corr_max_ofdm_mrc_x1 = 220,
 115
 116         .auto_corr_min_cck = 125,
 117         .auto_corr_max_cck = 200,
 118         .auto_corr_min_cck_mrc = 170,
 119         .auto_corr_max_cck_mrc = 400,
 120         .nrg_th_cck = 95,
 121         .nrg_th_ofdm = 95,
 122
 123         .barker_corr_th_min = 190,
 124         .barker_corr_th_min_mrc = 390,
 125         .nrg_th_cca = 62,
 126 };
 127
 128 #define IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF   (-5)
 129
 130 static s32 iwl_temp_calib_to_offset(struct iwl_shared *shrd)
 131 {
 132         u16 temperature, voltage;
 133         __le16 *temp_calib = (__le16 *)iwl_eeprom_query_addr(shrd,
 134                                 EEPROM_KELVIN_TEMPERATURE);
 135
 136         temperature = le16_to_cpu(temp_calib[0]);
 137         voltage = le16_to_cpu(temp_calib[1]);
 138
 139         /* offset = temp - volt / coeff */
 140         return (s32)(temperature - voltage / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF);
 141 }
 142
 143 static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
 144 {
 145         const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
 146         s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
 147                         iwl_temp_calib_to_offset(priv->shrd);
 148
 149         hw_params(priv).ct_kill_threshold = threshold * volt2temp_coef;
 150 }
 151
 152 static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
 153 {
 154         /* want Celsius */
 155         hw_params(priv).ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
 156 }
 157
 158 static void iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 159 {
 160         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 161             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 162                 cfg(priv)->base_params->num_of_queues =
 163                         iwlagn_mod_params.num_of_queues;
 164
 165         hw_params(priv).max_txq_num = cfg(priv)->base_params->num_of_queues;
 166
 167         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 168                                         BIT(IEEE80211_BAND_5GHZ);
 169
 170         hw_params(priv).tx_chains_num =
 171                 num_of_ant(hw_params(priv).valid_tx_ant);
 172         hw_params(priv).rx_chains_num =
 173                 num_of_ant(hw_params(priv).valid_rx_ant);
 174
 175         iwl5000_set_ct_threshold(priv);
 176
 177         /* Set initial sensitivity parameters */
 178         hw_params(priv).sens = &iwl5000_sensitivity;
 179 }
 180
 181 static void iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 182 {
 183         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 184             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 185                 cfg(priv)->base_params->num_of_queues =
 186                         iwlagn_mod_params.num_of_queues;
 187
 188         hw_params(priv).max_txq_num = cfg(priv)->base_params->num_of_queues;
 189
 190         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 191                                         BIT(IEEE80211_BAND_5GHZ);
 192
 193         hw_params(priv).tx_chains_num =
 194                 num_of_ant(hw_params(priv).valid_tx_ant);
 195         hw_params(priv).rx_chains_num =
 196                 num_of_ant(hw_params(priv).valid_rx_ant);
 197
 198         iwl5150_set_ct_threshold(priv);
 199
 200         /* Set initial sensitivity parameters */
 201         hw_params(priv).sens = &iwl5150_sensitivity;
 202 }
 203
 204 static void iwl5150_temperature(struct iwl_priv *priv)
 205 {
 206         u32 vt = 0;
 207         s32 offset =  iwl_temp_calib_to_offset(priv->shrd);
 208
 209         vt = le32_to_cpu(priv->statistics.common.temperature);
 210         vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
 211         /* now vt hold the temperature in Kelvin */
 212         priv->temperature = KELVIN_TO_CELSIUS(vt);
 213         iwl_tt_handler(priv);
 214 }
 215
 216 static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
 217                                      struct ieee80211_channel_switch *ch_switch)
 218 {
 219         /*
 220          * MULTI-FIXME
 221          * See iwlagn_mac_channel_switch.
 222          */
 223         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 224         struct iwl5000_channel_switch_cmd cmd;
 225         const struct iwl_channel_info *ch_info;
 226         u32 switch_time_in_usec, ucode_switch_time;
 227         u16 ch;
 228         u32 tsf_low;
 229         u8 switch_count;
 230         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
 231         struct ieee80211_vif *vif = ctx->vif;
 232         struct iwl_host_cmd hcmd = {
 233                 .id = REPLY_CHANNEL_SWITCH,
 234                 .len = { sizeof(cmd), },
 235                 .flags = CMD_SYNC,
 236                 .data = { &cmd, },
 237         };
 238
 239         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
 240         ch = ch_switch->channel->hw_value;
 241         IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
 242                       ctx->active.channel, ch);
 243         cmd.channel = cpu_to_le16(ch);
 244         cmd.rxon_flags = ctx->staging.flags;
 245         cmd.rxon_filter_flags = ctx->staging.filter_flags;
 246         switch_count = ch_switch->count;
 247         tsf_low = ch_switch->timestamp & 0x0ffffffff;
 248         /*
 249          * calculate the ucode channel switch time
 250          * adding TSF as one of the factor for when to switch
 251          */
 252         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
 253                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
 254                     beacon_interval)) {
 255                         switch_count -= (priv->ucode_beacon_time -
 256                                 tsf_low) / beacon_interval;
 257                 } else
 258                         switch_count = 0;
 259         }
 260         if (switch_count <= 1)
 261                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
 262         else {
 263                 switch_time_in_usec =
 264                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
 265                 ucode_switch_time = iwl_usecs_to_beacons(priv,
 266                                                          switch_time_in_usec,
 267                                                          beacon_interval);
 268                 cmd.switch_time = iwl_add_beacon_time(priv,
 269                                                       priv->ucode_beacon_time,
 270                                                       ucode_switch_time,
 271                                                       beacon_interval);
 272         }
 273         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
 274                       cmd.switch_time);
 275         ch_info = iwl_get_channel_info(priv, priv->band, ch);
 276         if (ch_info)
 277                 cmd.expect_beacon = is_channel_radar(ch_info);
 278         else {
 279                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
 280                         ctx->active.channel, ch);
 281                 return -EFAULT;
 282         }
 283
 284         return iwl_dvm_send_cmd(priv, &hcmd);
 285 }
 286
 287 static struct iwl_lib_ops iwl5000_lib = {
 288         .set_hw_params = iwl5000_hw_set_hw_params,
 289         .set_channel_switch = iwl5000_hw_channel_switch,
 290         .nic_config = iwl5000_nic_config,
 291         .eeprom_ops = {
 292                 .regulatory_bands = {
 293                         EEPROM_REG_BAND_1_CHANNELS,
 294                         EEPROM_REG_BAND_2_CHANNELS,
 295                         EEPROM_REG_BAND_3_CHANNELS,
 296                         EEPROM_REG_BAND_4_CHANNELS,
 297                         EEPROM_REG_BAND_5_CHANNELS,
 298                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 299                         EEPROM_REG_BAND_52_HT40_CHANNELS
 300                 },
 301         },
 302         .temperature = iwlagn_temperature,
 303 };
 304
 305 static struct iwl_lib_ops iwl5150_lib = {
 306         .set_hw_params = iwl5150_hw_set_hw_params,
 307         .set_channel_switch = iwl5000_hw_channel_switch,
 308         .nic_config = iwl5000_nic_config,
 309         .eeprom_ops = {
 310                 .regulatory_bands = {
 311                         EEPROM_REG_BAND_1_CHANNELS,
 312                         EEPROM_REG_BAND_2_CHANNELS,
 313                         EEPROM_REG_BAND_3_CHANNELS,
 314                         EEPROM_REG_BAND_4_CHANNELS,
 315                         EEPROM_REG_BAND_5_CHANNELS,
 316                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 317                         EEPROM_REG_BAND_52_HT40_CHANNELS
 318                 },
 319         },
 320         .temperature = iwl5150_temperature,
 321 };
 322
 323 static struct iwl_base_params iwl5000_base_params = {
 324         .eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
 325         .num_of_queues = IWLAGN_NUM_QUEUES,
 326         .num_of_ampdu_queues = IWLAGN_NUM_AMPDU_QUEUES,
 327         .pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
 328         .led_compensation = 51,
 329         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 330         .chain_noise_scale = 1000,
 331         .wd_timeout = IWL_LONG_WD_TIMEOUT,
 332         .max_event_log_size = 512,
 333         .no_idle_support = true,
 334         .wd_disable = true,
 335 };
 336 static struct iwl_ht_params iwl5000_ht_params = {
 337         .ht_greenfield_support = true,
 338 };
 339
 340 #define IWL_DEVICE_5000                                         \
 341         .fw_name_pre = IWL5000_FW_PRE,                          \
 342         .ucode_api_max = IWL5000_UCODE_API_MAX,                 \
 343         .ucode_api_min = IWL5000_UCODE_API_MIN,                 \
 344         .max_inst_size = IWLAGN_RTC_INST_SIZE,                  \
 345         .max_data_size = IWLAGN_RTC_DATA_SIZE,                  \
 346         .eeprom_ver = EEPROM_5000_EEPROM_VERSION,               \
 347         .eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,       \
 348         .lib = &iwl5000_lib,                                    \
 349         .base_params = &iwl5000_base_params,                    \
 350         .led_mode = IWL_LED_BLINK
 351
 352 const struct iwl_cfg iwl5300_agn_cfg = {
 353         .name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
 354         IWL_DEVICE_5000,
 355         /* at least EEPROM 0x11A has wrong info */
 356         .valid_tx_ant = ANT_ABC,        /* .cfg overwrite */
 357         .valid_rx_ant = ANT_ABC,        /* .cfg overwrite */
 358         .ht_params = &iwl5000_ht_params,
 359 };
 360
 361 const struct iwl_cfg iwl5100_bgn_cfg = {
 362         .name = "Intel(R) WiFi Link 5100 BGN",
 363         IWL_DEVICE_5000,
 364         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 365         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 366         .ht_params = &iwl5000_ht_params,
 367 };
 368
 369 const struct iwl_cfg iwl5100_abg_cfg = {
 370         .name = "Intel(R) WiFi Link 5100 ABG",
 371         IWL_DEVICE_5000,
 372         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 373         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 374 };
 375
 376 const struct iwl_cfg iwl5100_agn_cfg = {
 377         .name = "Intel(R) WiFi Link 5100 AGN",
 378         IWL_DEVICE_5000,
 379         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 380         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 381         .ht_params = &iwl5000_ht_params,
 382 };
 383
 384 const struct iwl_cfg iwl5350_agn_cfg = {
 385         .name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
 386         .fw_name_pre = IWL5000_FW_PRE,
 387         .ucode_api_max = IWL5000_UCODE_API_MAX,
 388         .ucode_api_min = IWL5000_UCODE_API_MIN,
 389         .max_inst_size = IWLAGN_RTC_INST_SIZE,
 390         .max_data_size = IWLAGN_RTC_DATA_SIZE,
 391         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,
 392         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
 393         .lib = &iwl5000_lib,
 394         .base_params = &iwl5000_base_params,
 395         .ht_params = &iwl5000_ht_params,
 396         .led_mode = IWL_LED_BLINK,
 397         .internal_wimax_coex = true,
 398 };
 399
 400 #define IWL_DEVICE_5150                                         \
 401         .fw_name_pre = IWL5150_FW_PRE,                          \
 402         .ucode_api_max = IWL5150_UCODE_API_MAX,                 \
 403         .ucode_api_min = IWL5150_UCODE_API_MIN,                 \
 404         .max_inst_size = IWLAGN_RTC_INST_SIZE,                  \
 405         .max_data_size = IWLAGN_RTC_DATA_SIZE,                  \
 406         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,               \
 407         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,       \
 408         .lib = &iwl5150_lib,                                    \
 409         .base_params = &iwl5000_base_params,                    \
 410         .no_xtal_calib = true,                                  \
 411         .led_mode = IWL_LED_BLINK,                              \
 412         .internal_wimax_coex = true
 413
 414 const struct iwl_cfg iwl5150_agn_cfg = {
 415         .name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
 416         IWL_DEVICE_5150,
 417         .ht_params = &iwl5000_ht_params,
 418
 419 };
 420
 421 const struct iwl_cfg iwl5150_abg_cfg = {
 422         .name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
 423         IWL_DEVICE_5150,
 424 };
 425
 426 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
 427 MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_MAX));