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         unsigned long flags;
  67
  68         iwl_rf_config(priv);
  69
  70         spin_lock_irqsave(&priv->shrd->lock, flags);
  71
  72         /* W/A : NIC is stuck in a reset state after Early PCIe power off
  73          * (PCIe power is lost before PERST# is asserted),
  74          * causing ME FW to lose ownership and not being able to obtain it back.
  75          */
  76         iwl_set_bits_mask_prph(trans(priv), APMG_PS_CTRL_REG,
  77                                 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
  78                                 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
  79
  80
  81         spin_unlock_irqrestore(&priv->shrd->lock, flags);
  82 }
  83
  84 static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
  85         .min_nrg_cck = 100,
  86         .max_nrg_cck = 0, /* not used, set to 0 */
  87         .auto_corr_min_ofdm = 90,
  88         .auto_corr_min_ofdm_mrc = 170,
  89         .auto_corr_min_ofdm_x1 = 105,
  90         .auto_corr_min_ofdm_mrc_x1 = 220,
  91
  92         .auto_corr_max_ofdm = 120,
  93         .auto_corr_max_ofdm_mrc = 210,
  94         .auto_corr_max_ofdm_x1 = 120,
  95         .auto_corr_max_ofdm_mrc_x1 = 240,
  96
  97         .auto_corr_min_cck = 125,
  98         .auto_corr_max_cck = 200,
  99         .auto_corr_min_cck_mrc = 200,
 100         .auto_corr_max_cck_mrc = 400,
 101         .nrg_th_cck = 100,
 102         .nrg_th_ofdm = 100,
 103
 104         .barker_corr_th_min = 190,
 105         .barker_corr_th_min_mrc = 390,
 106         .nrg_th_cca = 62,
 107 };
 108
 109 static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
 110         .min_nrg_cck = 95,
 111         .max_nrg_cck = 0, /* not used, set to 0 */
 112         .auto_corr_min_ofdm = 90,
 113         .auto_corr_min_ofdm_mrc = 170,
 114         .auto_corr_min_ofdm_x1 = 105,
 115         .auto_corr_min_ofdm_mrc_x1 = 220,
 116
 117         .auto_corr_max_ofdm = 120,
 118         .auto_corr_max_ofdm_mrc = 210,
 119         /* max = min for performance bug in 5150 DSP */
 120         .auto_corr_max_ofdm_x1 = 105,
 121         .auto_corr_max_ofdm_mrc_x1 = 220,
 122
 123         .auto_corr_min_cck = 125,
 124         .auto_corr_max_cck = 200,
 125         .auto_corr_min_cck_mrc = 170,
 126         .auto_corr_max_cck_mrc = 400,
 127         .nrg_th_cck = 95,
 128         .nrg_th_ofdm = 95,
 129
 130         .barker_corr_th_min = 190,
 131         .barker_corr_th_min_mrc = 390,
 132         .nrg_th_cca = 62,
 133 };
 134
 135 #define IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF   (-5)
 136
 137 static s32 iwl_temp_calib_to_offset(struct iwl_shared *shrd)
 138 {
 139         u16 temperature, voltage;
 140         __le16 *temp_calib = (__le16 *)iwl_eeprom_query_addr(shrd,
 141                                 EEPROM_KELVIN_TEMPERATURE);
 142
 143         temperature = le16_to_cpu(temp_calib[0]);
 144         voltage = le16_to_cpu(temp_calib[1]);
 145
 146         /* offset = temp - volt / coeff */
 147         return (s32)(temperature - voltage / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF);
 148 }
 149
 150 static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
 151 {
 152         const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
 153         s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
 154                         iwl_temp_calib_to_offset(priv->shrd);
 155
 156         hw_params(priv).ct_kill_threshold = threshold * volt2temp_coef;
 157 }
 158
 159 static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
 160 {
 161         /* want Celsius */
 162         hw_params(priv).ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
 163 }
 164
 165 static void iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 166 {
 167         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 168             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 169                 cfg(priv)->base_params->num_of_queues =
 170                         iwlagn_mod_params.num_of_queues;
 171
 172         hw_params(priv).max_txq_num = cfg(priv)->base_params->num_of_queues;
 173
 174         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 175                                         BIT(IEEE80211_BAND_5GHZ);
 176
 177         hw_params(priv).tx_chains_num = num_of_ant(cfg(priv)->valid_tx_ant);
 178         hw_params(priv).rx_chains_num = num_of_ant(cfg(priv)->valid_rx_ant);
 179         hw_params(priv).valid_tx_ant = cfg(priv)->valid_tx_ant;
 180         hw_params(priv).valid_rx_ant = cfg(priv)->valid_rx_ant;
 181
 182         iwl5000_set_ct_threshold(priv);
 183
 184         /* Set initial sensitivity parameters */
 185         hw_params(priv).sens = &iwl5000_sensitivity;
 186 }
 187
 188 static void iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 189 {
 190         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 191             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 192                 cfg(priv)->base_params->num_of_queues =
 193                         iwlagn_mod_params.num_of_queues;
 194
 195         hw_params(priv).max_txq_num = cfg(priv)->base_params->num_of_queues;
 196
 197         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 198                                         BIT(IEEE80211_BAND_5GHZ);
 199
 200         hw_params(priv).tx_chains_num = num_of_ant(cfg(priv)->valid_tx_ant);
 201         hw_params(priv).rx_chains_num = num_of_ant(cfg(priv)->valid_rx_ant);
 202         hw_params(priv).valid_tx_ant = cfg(priv)->valid_tx_ant;
 203         hw_params(priv).valid_rx_ant = cfg(priv)->valid_rx_ant;
 204
 205         iwl5150_set_ct_threshold(priv);
 206
 207         /* Set initial sensitivity parameters */
 208         hw_params(priv).sens = &iwl5150_sensitivity;
 209 }
 210
 211 static void iwl5150_temperature(struct iwl_priv *priv)
 212 {
 213         u32 vt = 0;
 214         s32 offset =  iwl_temp_calib_to_offset(priv->shrd);
 215
 216         vt = le32_to_cpu(priv->statistics.common.temperature);
 217         vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
 218         /* now vt hold the temperature in Kelvin */
 219         priv->temperature = KELVIN_TO_CELSIUS(vt);
 220         iwl_tt_handler(priv);
 221 }
 222
 223 static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
 224                                      struct ieee80211_channel_switch *ch_switch)
 225 {
 226         /*
 227          * MULTI-FIXME
 228          * See iwlagn_mac_channel_switch.
 229          */
 230         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 231         struct iwl5000_channel_switch_cmd cmd;
 232         const struct iwl_channel_info *ch_info;
 233         u32 switch_time_in_usec, ucode_switch_time;
 234         u16 ch;
 235         u32 tsf_low;
 236         u8 switch_count;
 237         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
 238         struct ieee80211_vif *vif = ctx->vif;
 239         struct iwl_host_cmd hcmd = {
 240                 .id = REPLY_CHANNEL_SWITCH,
 241                 .len = { sizeof(cmd), },
 242                 .flags = CMD_SYNC,
 243                 .data = { &cmd, },
 244         };
 245
 246         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
 247         ch = ch_switch->channel->hw_value;
 248         IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
 249                       ctx->active.channel, ch);
 250         cmd.channel = cpu_to_le16(ch);
 251         cmd.rxon_flags = ctx->staging.flags;
 252         cmd.rxon_filter_flags = ctx->staging.filter_flags;
 253         switch_count = ch_switch->count;
 254         tsf_low = ch_switch->timestamp & 0x0ffffffff;
 255         /*
 256          * calculate the ucode channel switch time
 257          * adding TSF as one of the factor for when to switch
 258          */
 259         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
 260                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
 261                     beacon_interval)) {
 262                         switch_count -= (priv->ucode_beacon_time -
 263                                 tsf_low) / beacon_interval;
 264                 } else
 265                         switch_count = 0;
 266         }
 267         if (switch_count <= 1)
 268                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
 269         else {
 270                 switch_time_in_usec =
 271                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
 272                 ucode_switch_time = iwl_usecs_to_beacons(priv,
 273                                                          switch_time_in_usec,
 274                                                          beacon_interval);
 275                 cmd.switch_time = iwl_add_beacon_time(priv,
 276                                                       priv->ucode_beacon_time,
 277                                                       ucode_switch_time,
 278                                                       beacon_interval);
 279         }
 280         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
 281                       cmd.switch_time);
 282         ch_info = iwl_get_channel_info(priv, priv->band, ch);
 283         if (ch_info)
 284                 cmd.expect_beacon = is_channel_radar(ch_info);
 285         else {
 286                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
 287                         ctx->active.channel, ch);
 288                 return -EFAULT;
 289         }
 290
 291         return iwl_trans_send_cmd(trans(priv), &hcmd);
 292 }
 293
 294 static struct iwl_lib_ops iwl5000_lib = {
 295         .set_hw_params = iwl5000_hw_set_hw_params,
 296         .set_channel_switch = iwl5000_hw_channel_switch,
 297         .nic_config = iwl5000_nic_config,
 298         .eeprom_ops = {
 299                 .regulatory_bands = {
 300                         EEPROM_REG_BAND_1_CHANNELS,
 301                         EEPROM_REG_BAND_2_CHANNELS,
 302                         EEPROM_REG_BAND_3_CHANNELS,
 303                         EEPROM_REG_BAND_4_CHANNELS,
 304                         EEPROM_REG_BAND_5_CHANNELS,
 305                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 306                         EEPROM_REG_BAND_52_HT40_CHANNELS
 307                 },
 308         },
 309         .temperature = iwlagn_temperature,
 310 };
 311
 312 static struct iwl_lib_ops iwl5150_lib = {
 313         .set_hw_params = iwl5150_hw_set_hw_params,
 314         .set_channel_switch = iwl5000_hw_channel_switch,
 315         .nic_config = iwl5000_nic_config,
 316         .eeprom_ops = {
 317                 .regulatory_bands = {
 318                         EEPROM_REG_BAND_1_CHANNELS,
 319                         EEPROM_REG_BAND_2_CHANNELS,
 320                         EEPROM_REG_BAND_3_CHANNELS,
 321                         EEPROM_REG_BAND_4_CHANNELS,
 322                         EEPROM_REG_BAND_5_CHANNELS,
 323                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 324                         EEPROM_REG_BAND_52_HT40_CHANNELS
 325                 },
 326         },
 327         .temperature = iwl5150_temperature,
 328 };
 329
 330 static struct iwl_base_params iwl5000_base_params = {
 331         .eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
 332         .num_of_queues = IWLAGN_NUM_QUEUES,
 333         .num_of_ampdu_queues = IWLAGN_NUM_AMPDU_QUEUES,
 334         .pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
 335         .led_compensation = 51,
 336         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 337         .chain_noise_scale = 1000,
 338         .wd_timeout = IWL_LONG_WD_TIMEOUT,
 339         .max_event_log_size = 512,
 340         .no_idle_support = true,
 341         .wd_disable = true,
 342 };
 343 static struct iwl_ht_params iwl5000_ht_params = {
 344         .ht_greenfield_support = true,
 345 };
 346
 347 #define IWL_DEVICE_5000                                         \
 348         .fw_name_pre = IWL5000_FW_PRE,                          \
 349         .ucode_api_max = IWL5000_UCODE_API_MAX,                 \
 350         .ucode_api_min = IWL5000_UCODE_API_MIN,                 \
 351         .max_inst_size = IWLAGN_RTC_INST_SIZE,                  \
 352         .max_data_size = IWLAGN_RTC_DATA_SIZE,                  \
 353         .eeprom_ver = EEPROM_5000_EEPROM_VERSION,               \
 354         .eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,       \
 355         .lib = &iwl5000_lib,                                    \
 356         .base_params = &iwl5000_base_params,                    \
 357         .led_mode = IWL_LED_BLINK
 358
 359 struct iwl_cfg iwl5300_agn_cfg = {
 360         .name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
 361         IWL_DEVICE_5000,
 362         /* at least EEPROM 0x11A has wrong info */
 363         .valid_tx_ant = ANT_ABC,        /* .cfg overwrite */
 364         .valid_rx_ant = ANT_ABC,        /* .cfg overwrite */
 365         .ht_params = &iwl5000_ht_params,
 366 };
 367
 368 struct iwl_cfg iwl5100_bgn_cfg = {
 369         .name = "Intel(R) WiFi Link 5100 BGN",
 370         IWL_DEVICE_5000,
 371         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 372         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 373         .ht_params = &iwl5000_ht_params,
 374 };
 375
 376 struct iwl_cfg iwl5100_abg_cfg = {
 377         .name = "Intel(R) WiFi Link 5100 ABG",
 378         IWL_DEVICE_5000,
 379         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 380         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 381 };
 382
 383 struct iwl_cfg iwl5100_agn_cfg = {
 384         .name = "Intel(R) WiFi Link 5100 AGN",
 385         IWL_DEVICE_5000,
 386         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 387         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 388         .ht_params = &iwl5000_ht_params,
 389 };
 390
 391 struct iwl_cfg iwl5350_agn_cfg = {
 392         .name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
 393         .fw_name_pre = IWL5000_FW_PRE,
 394         .ucode_api_max = IWL5000_UCODE_API_MAX,
 395         .ucode_api_min = IWL5000_UCODE_API_MIN,
 396         .max_inst_size = IWLAGN_RTC_INST_SIZE,
 397         .max_data_size = IWLAGN_RTC_DATA_SIZE,
 398         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,
 399         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
 400         .lib = &iwl5000_lib,
 401         .base_params = &iwl5000_base_params,
 402         .ht_params = &iwl5000_ht_params,
 403         .led_mode = IWL_LED_BLINK,
 404         .internal_wimax_coex = true,
 405 };
 406
 407 #define IWL_DEVICE_5150                                         \
 408         .fw_name_pre = IWL5150_FW_PRE,                          \
 409         .ucode_api_max = IWL5150_UCODE_API_MAX,                 \
 410         .ucode_api_min = IWL5150_UCODE_API_MIN,                 \
 411         .max_inst_size = IWLAGN_RTC_INST_SIZE,                  \
 412         .max_data_size = IWLAGN_RTC_DATA_SIZE,                  \
 413         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,               \
 414         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,       \
 415         .lib = &iwl5150_lib,                                    \
 416         .base_params = &iwl5000_base_params,                    \
 417         .no_xtal_calib = true,                                  \
 418         .led_mode = IWL_LED_BLINK,                              \
 419         .internal_wimax_coex = true
 420
 421 struct iwl_cfg iwl5150_agn_cfg = {
 422         .name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
 423         IWL_DEVICE_5150,
 424         .ht_params = &iwl5000_ht_params,
 425
 426 };
 427
 428 struct iwl_cfg iwl5150_abg_cfg = {
 429         .name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
 430         IWL_DEVICE_5150,
 431 };
 432
 433 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
 434 MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_MAX));