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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 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-sta.h"
  44 #include "iwl-helpers.h"
  45 #include "iwl-agn.h"
  46 #include "iwl-agn-hw.h"
  47 #include "iwl-5000-hw.h"
  48 #include "iwl-trans.h"
  49 #include "iwl-shared.h"
  50 #include "iwl-pci.h"
  51
  52 /* Highest firmware API version supported */
  53 #define IWL5000_UCODE_API_MAX 5
  54 #define IWL5150_UCODE_API_MAX 2
  55
  56 /* Lowest firmware API version supported */
  57 #define IWL5000_UCODE_API_MIN 1
  58 #define IWL5150_UCODE_API_MIN 1
  59
  60 #define IWL5000_FW_PRE "iwlwifi-5000-"
  61 #define IWL5000_MODULE_FIRMWARE(api) IWL5000_FW_PRE __stringify(api) ".ucode"
  62
  63 #define IWL5150_FW_PRE "iwlwifi-5150-"
  64 #define IWL5150_MODULE_FIRMWARE(api) IWL5150_FW_PRE __stringify(api) ".ucode"
  65
  66 /* NIC configuration for 5000 series */
  67 static void iwl5000_nic_config(struct iwl_priv *priv)
  68 {
  69         unsigned long flags;
  70
  71         iwl_rf_config(priv);
  72
  73         spin_lock_irqsave(&priv->shrd->lock, flags);
  74
  75         /* W/A : NIC is stuck in a reset state after Early PCIe power off
  76          * (PCIe power is lost before PERST# is asserted),
  77          * causing ME FW to lose ownership and not being able to obtain it back.
  78          */
  79         iwl_set_bits_mask_prph(bus(priv), APMG_PS_CTRL_REG,
  80                                 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
  81                                 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
  82
  83
  84         spin_unlock_irqrestore(&priv->shrd->lock, flags);
  85 }
  86
  87 static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
  88         .min_nrg_cck = 100,
  89         .max_nrg_cck = 0, /* not used, set to 0 */
  90         .auto_corr_min_ofdm = 90,
  91         .auto_corr_min_ofdm_mrc = 170,
  92         .auto_corr_min_ofdm_x1 = 105,
  93         .auto_corr_min_ofdm_mrc_x1 = 220,
  94
  95         .auto_corr_max_ofdm = 120,
  96         .auto_corr_max_ofdm_mrc = 210,
  97         .auto_corr_max_ofdm_x1 = 120,
  98         .auto_corr_max_ofdm_mrc_x1 = 240,
  99
 100         .auto_corr_min_cck = 125,
 101         .auto_corr_max_cck = 200,
 102         .auto_corr_min_cck_mrc = 200,
 103         .auto_corr_max_cck_mrc = 400,
 104         .nrg_th_cck = 100,
 105         .nrg_th_ofdm = 100,
 106
 107         .barker_corr_th_min = 190,
 108         .barker_corr_th_min_mrc = 390,
 109         .nrg_th_cca = 62,
 110 };
 111
 112 static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
 113         .min_nrg_cck = 95,
 114         .max_nrg_cck = 0, /* not used, set to 0 */
 115         .auto_corr_min_ofdm = 90,
 116         .auto_corr_min_ofdm_mrc = 170,
 117         .auto_corr_min_ofdm_x1 = 105,
 118         .auto_corr_min_ofdm_mrc_x1 = 220,
 119
 120         .auto_corr_max_ofdm = 120,
 121         .auto_corr_max_ofdm_mrc = 210,
 122         /* max = min for performance bug in 5150 DSP */
 123         .auto_corr_max_ofdm_x1 = 105,
 124         .auto_corr_max_ofdm_mrc_x1 = 220,
 125
 126         .auto_corr_min_cck = 125,
 127         .auto_corr_max_cck = 200,
 128         .auto_corr_min_cck_mrc = 170,
 129         .auto_corr_max_cck_mrc = 400,
 130         .nrg_th_cck = 95,
 131         .nrg_th_ofdm = 95,
 132
 133         .barker_corr_th_min = 190,
 134         .barker_corr_th_min_mrc = 390,
 135         .nrg_th_cca = 62,
 136 };
 137
 138 static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
 139 {
 140         const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
 141         s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
 142                         iwl_temp_calib_to_offset(priv);
 143
 144         hw_params(priv).ct_kill_threshold = threshold * volt2temp_coef;
 145 }
 146
 147 static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
 148 {
 149         /* want Celsius */
 150         hw_params(priv).ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
 151 }
 152
 153 static int iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 154 {
 155         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 156             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 157                 priv->cfg->base_params->num_of_queues =
 158                         iwlagn_mod_params.num_of_queues;
 159
 160         hw_params(priv).max_txq_num = priv->cfg->base_params->num_of_queues;
 161         hw_params(priv).max_stations = IWLAGN_STATION_COUNT;
 162         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 163
 164         hw_params(priv).max_data_size = IWLAGN_RTC_DATA_SIZE;
 165         hw_params(priv).max_inst_size = IWLAGN_RTC_INST_SIZE;
 166
 167         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 168                                         BIT(IEEE80211_BAND_5GHZ);
 169
 170         hw_params(priv).tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 171         hw_params(priv).rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 172         hw_params(priv).valid_tx_ant = priv->cfg->valid_tx_ant;
 173         hw_params(priv).valid_rx_ant = priv->cfg->valid_rx_ant;
 174
 175         iwl5000_set_ct_threshold(priv);
 176
 177         /* Set initial sensitivity parameters */
 178         /* Set initial calibration set */
 179         hw_params(priv).sens = &iwl5000_sensitivity;
 180         hw_params(priv).calib_init_cfg =
 181                 BIT(IWL_CALIB_XTAL)             |
 182                 BIT(IWL_CALIB_LO)               |
 183                 BIT(IWL_CALIB_TX_IQ)            |
 184                 BIT(IWL_CALIB_TX_IQ_PERD)       |
 185                 BIT(IWL_CALIB_BASE_BAND);
 186
 187         hw_params(priv).beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
 188
 189         return 0;
 190 }
 191
 192 static int iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 193 {
 194         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 195             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 196                 priv->cfg->base_params->num_of_queues =
 197                         iwlagn_mod_params.num_of_queues;
 198
 199         hw_params(priv).max_txq_num = priv->cfg->base_params->num_of_queues;
 200         hw_params(priv).max_stations = IWLAGN_STATION_COUNT;
 201         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 202
 203         hw_params(priv).max_data_size = IWLAGN_RTC_DATA_SIZE;
 204         hw_params(priv).max_inst_size = IWLAGN_RTC_INST_SIZE;
 205
 206         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 207                                         BIT(IEEE80211_BAND_5GHZ);
 208
 209         hw_params(priv).tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 210         hw_params(priv).rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 211         hw_params(priv).valid_tx_ant = priv->cfg->valid_tx_ant;
 212         hw_params(priv).valid_rx_ant = priv->cfg->valid_rx_ant;
 213
 214         iwl5150_set_ct_threshold(priv);
 215
 216         /* Set initial sensitivity parameters */
 217         /* Set initial calibration set */
 218         hw_params(priv).sens = &iwl5150_sensitivity;
 219         hw_params(priv).calib_init_cfg =
 220                 BIT(IWL_CALIB_LO)               |
 221                 BIT(IWL_CALIB_TX_IQ)            |
 222                 BIT(IWL_CALIB_BASE_BAND);
 223         if (priv->cfg->need_dc_calib)
 224                 hw_params(priv).calib_init_cfg |= BIT(IWL_CALIB_DC);
 225
 226         hw_params(priv).beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
 227
 228         return 0;
 229 }
 230
 231 static void iwl5150_temperature(struct iwl_priv *priv)
 232 {
 233         u32 vt = 0;
 234         s32 offset =  iwl_temp_calib_to_offset(priv);
 235
 236         vt = le32_to_cpu(priv->statistics.common.temperature);
 237         vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
 238         /* now vt hold the temperature in Kelvin */
 239         priv->temperature = KELVIN_TO_CELSIUS(vt);
 240         iwl_tt_handler(priv);
 241 }
 242
 243 static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
 244                                      struct ieee80211_channel_switch *ch_switch)
 245 {
 246         /*
 247          * MULTI-FIXME
 248          * See iwl_mac_channel_switch.
 249          */
 250         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 251         struct iwl5000_channel_switch_cmd cmd;
 252         const struct iwl_channel_info *ch_info;
 253         u32 switch_time_in_usec, ucode_switch_time;
 254         u16 ch;
 255         u32 tsf_low;
 256         u8 switch_count;
 257         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
 258         struct ieee80211_vif *vif = ctx->vif;
 259         struct iwl_host_cmd hcmd = {
 260                 .id = REPLY_CHANNEL_SWITCH,
 261                 .len = { sizeof(cmd), },
 262                 .flags = CMD_SYNC,
 263                 .data = { &cmd, },
 264         };
 265
 266         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
 267         ch = ch_switch->channel->hw_value;
 268         IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
 269                       ctx->active.channel, ch);
 270         cmd.channel = cpu_to_le16(ch);
 271         cmd.rxon_flags = ctx->staging.flags;
 272         cmd.rxon_filter_flags = ctx->staging.filter_flags;
 273         switch_count = ch_switch->count;
 274         tsf_low = ch_switch->timestamp & 0x0ffffffff;
 275         /*
 276          * calculate the ucode channel switch time
 277          * adding TSF as one of the factor for when to switch
 278          */
 279         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
 280                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
 281                     beacon_interval)) {
 282                         switch_count -= (priv->ucode_beacon_time -
 283                                 tsf_low) / beacon_interval;
 284                 } else
 285                         switch_count = 0;
 286         }
 287         if (switch_count <= 1)
 288                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
 289         else {
 290                 switch_time_in_usec =
 291                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
 292                 ucode_switch_time = iwl_usecs_to_beacons(priv,
 293                                                          switch_time_in_usec,
 294                                                          beacon_interval);
 295                 cmd.switch_time = iwl_add_beacon_time(priv,
 296                                                       priv->ucode_beacon_time,
 297                                                       ucode_switch_time,
 298                                                       beacon_interval);
 299         }
 300         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
 301                       cmd.switch_time);
 302         ch_info = iwl_get_channel_info(priv, priv->band, ch);
 303         if (ch_info)
 304                 cmd.expect_beacon = is_channel_radar(ch_info);
 305         else {
 306                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
 307                         ctx->active.channel, ch);
 308                 return -EFAULT;
 309         }
 310
 311         return iwl_trans_send_cmd(trans(priv), &hcmd);
 312 }
 313
 314 static struct iwl_lib_ops iwl5000_lib = {
 315         .set_hw_params = iwl5000_hw_set_hw_params,
 316         .set_channel_switch = iwl5000_hw_channel_switch,
 317         .nic_config = iwl5000_nic_config,
 318         .eeprom_ops = {
 319                 .regulatory_bands = {
 320                         EEPROM_REG_BAND_1_CHANNELS,
 321                         EEPROM_REG_BAND_2_CHANNELS,
 322                         EEPROM_REG_BAND_3_CHANNELS,
 323                         EEPROM_REG_BAND_4_CHANNELS,
 324                         EEPROM_REG_BAND_5_CHANNELS,
 325                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 326                         EEPROM_REG_BAND_52_HT40_CHANNELS
 327                 },
 328         },
 329         .temperature = iwlagn_temperature,
 330 };
 331
 332 static struct iwl_lib_ops iwl5150_lib = {
 333         .set_hw_params = iwl5150_hw_set_hw_params,
 334         .set_channel_switch = iwl5000_hw_channel_switch,
 335         .nic_config = iwl5000_nic_config,
 336         .eeprom_ops = {
 337                 .regulatory_bands = {
 338                         EEPROM_REG_BAND_1_CHANNELS,
 339                         EEPROM_REG_BAND_2_CHANNELS,
 340                         EEPROM_REG_BAND_3_CHANNELS,
 341                         EEPROM_REG_BAND_4_CHANNELS,
 342                         EEPROM_REG_BAND_5_CHANNELS,
 343                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 344                         EEPROM_REG_BAND_52_HT40_CHANNELS
 345                 },
 346         },
 347         .temperature = iwl5150_temperature,
 348 };
 349
 350 static struct iwl_base_params iwl5000_base_params = {
 351         .eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
 352         .num_of_queues = IWLAGN_NUM_QUEUES,
 353         .num_of_ampdu_queues = IWLAGN_NUM_AMPDU_QUEUES,
 354         .pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
 355         .led_compensation = 51,
 356         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
 357         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 358         .chain_noise_scale = 1000,
 359         .wd_timeout = IWL_LONG_WD_TIMEOUT,
 360         .max_event_log_size = 512,
 361         .no_idle_support = true,
 362 };
 363 static struct iwl_ht_params iwl5000_ht_params = {
 364         .ht_greenfield_support = true,
 365 };
 366
 367 #define IWL_DEVICE_5000                                         \
 368         .fw_name_pre = IWL5000_FW_PRE,                          \
 369         .ucode_api_max = IWL5000_UCODE_API_MAX,                 \
 370         .ucode_api_min = IWL5000_UCODE_API_MIN,                 \
 371         .eeprom_ver = EEPROM_5000_EEPROM_VERSION,               \
 372         .eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,       \
 373         .lib = &iwl5000_lib,                                    \
 374         .base_params = &iwl5000_base_params,                    \
 375         .led_mode = IWL_LED_BLINK
 376
 377 struct iwl_cfg iwl5300_agn_cfg = {
 378         .name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
 379         IWL_DEVICE_5000,
 380         /* at least EEPROM 0x11A has wrong info */
 381         .valid_tx_ant = ANT_ABC,        /* .cfg overwrite */
 382         .valid_rx_ant = ANT_ABC,        /* .cfg overwrite */
 383         .ht_params = &iwl5000_ht_params,
 384 };
 385
 386 struct iwl_cfg iwl5100_bgn_cfg = {
 387         .name = "Intel(R) WiFi Link 5100 BGN",
 388         IWL_DEVICE_5000,
 389         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 390         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 391         .ht_params = &iwl5000_ht_params,
 392 };
 393
 394 struct iwl_cfg iwl5100_abg_cfg = {
 395         .name = "Intel(R) WiFi Link 5100 ABG",
 396         IWL_DEVICE_5000,
 397         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 398         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 399 };
 400
 401 struct iwl_cfg iwl5100_agn_cfg = {
 402         .name = "Intel(R) WiFi Link 5100 AGN",
 403         IWL_DEVICE_5000,
 404         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 405         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 406         .ht_params = &iwl5000_ht_params,
 407 };
 408
 409 struct iwl_cfg iwl5350_agn_cfg = {
 410         .name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
 411         .fw_name_pre = IWL5000_FW_PRE,
 412         .ucode_api_max = IWL5000_UCODE_API_MAX,
 413         .ucode_api_min = IWL5000_UCODE_API_MIN,
 414         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,
 415         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
 416         .lib = &iwl5000_lib,
 417         .base_params = &iwl5000_base_params,
 418         .ht_params = &iwl5000_ht_params,
 419         .led_mode = IWL_LED_BLINK,
 420         .internal_wimax_coex = true,
 421 };
 422
 423 #define IWL_DEVICE_5150                                         \
 424         .fw_name_pre = IWL5150_FW_PRE,                          \
 425         .ucode_api_max = IWL5150_UCODE_API_MAX,                 \
 426         .ucode_api_min = IWL5150_UCODE_API_MIN,                 \
 427         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,               \
 428         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,       \
 429         .lib = &iwl5150_lib,                                    \
 430         .base_params = &iwl5000_base_params,                    \
 431         .need_dc_calib = true,                                  \
 432         .led_mode = IWL_LED_BLINK,                              \
 433         .internal_wimax_coex = true
 434
 435 struct iwl_cfg iwl5150_agn_cfg = {
 436         .name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
 437         IWL_DEVICE_5150,
 438         .ht_params = &iwl5000_ht_params,
 439
 440 };
 441
 442 struct iwl_cfg iwl5150_abg_cfg = {
 443         .name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
 444         IWL_DEVICE_5150,
 445 };
 446
 447 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
 448 MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_MAX));