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 <linux/wireless.h>
  35 #include <net/mac80211.h>
  36 #include <linux/etherdevice.h>
  37 #include <asm/unaligned.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
  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 #api ".ucode"
  59
  60 #define IWL5150_FW_PRE "iwlwifi-5150-"
  61 #define IWL5150_MODULE_FIRMWARE(api) IWL5150_FW_PRE #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->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(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->lock, flags);
  82 }
  83
  84 static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
  85         .min_nrg_cck = 95,
  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 = 120,
  90         .auto_corr_min_ofdm_mrc_x1 = 240,
  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 = 170,
 100         .auto_corr_max_cck_mrc = 400,
 101         .nrg_th_cck = 95,
 102         .nrg_th_ofdm = 95,
 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 static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
 136 {
 137         const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
 138         s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
 139                         iwl_temp_calib_to_offset(priv);
 140
 141         priv->hw_params.ct_kill_threshold = threshold * volt2temp_coef;
 142 }
 143
 144 static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
 145 {
 146         /* want Celsius */
 147         priv->hw_params.ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
 148 }
 149
 150 static int iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 151 {
 152         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 153             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 154                 priv->cfg->base_params->num_of_queues =
 155                         iwlagn_mod_params.num_of_queues;
 156
 157         priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
 158         priv->hw_params.dma_chnl_num = FH50_TCSR_CHNL_NUM;
 159         priv->hw_params.scd_bc_tbls_size =
 160                         priv->cfg->base_params->num_of_queues *
 161                         sizeof(struct iwlagn_scd_bc_tbl);
 162         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
 163         priv->hw_params.max_stations = IWLAGN_STATION_COUNT;
 164         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 165
 166         priv->hw_params.max_data_size = IWLAGN_RTC_DATA_SIZE;
 167         priv->hw_params.max_inst_size = IWLAGN_RTC_INST_SIZE;
 168
 169         priv->hw_params.ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 170                                         BIT(IEEE80211_BAND_5GHZ);
 171         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
 172
 173         priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 174         priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 175         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
 176         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 177
 178         iwl5000_set_ct_threshold(priv);
 179
 180         /* Set initial sensitivity parameters */
 181         /* Set initial calibration set */
 182         priv->hw_params.sens = &iwl5000_sensitivity;
 183         priv->hw_params.calib_init_cfg =
 184                 BIT(IWL_CALIB_XTAL)             |
 185                 BIT(IWL_CALIB_LO)               |
 186                 BIT(IWL_CALIB_TX_IQ)            |
 187                 BIT(IWL_CALIB_TX_IQ_PERD)       |
 188                 BIT(IWL_CALIB_BASE_BAND);
 189
 190         priv->hw_params.beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
 191
 192         return 0;
 193 }
 194
 195 static int iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 196 {
 197         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 198             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 199                 priv->cfg->base_params->num_of_queues =
 200                         iwlagn_mod_params.num_of_queues;
 201
 202         priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
 203         priv->hw_params.dma_chnl_num = FH50_TCSR_CHNL_NUM;
 204         priv->hw_params.scd_bc_tbls_size =
 205                         priv->cfg->base_params->num_of_queues *
 206                         sizeof(struct iwlagn_scd_bc_tbl);
 207         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
 208         priv->hw_params.max_stations = IWLAGN_STATION_COUNT;
 209         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 210
 211         priv->hw_params.max_data_size = IWLAGN_RTC_DATA_SIZE;
 212         priv->hw_params.max_inst_size = IWLAGN_RTC_INST_SIZE;
 213
 214         priv->hw_params.ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 215                                         BIT(IEEE80211_BAND_5GHZ);
 216         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
 217
 218         priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 219         priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 220         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
 221         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 222
 223         iwl5150_set_ct_threshold(priv);
 224
 225         /* Set initial sensitivity parameters */
 226         /* Set initial calibration set */
 227         priv->hw_params.sens = &iwl5150_sensitivity;
 228         priv->hw_params.calib_init_cfg =
 229                 BIT(IWL_CALIB_LO)               |
 230                 BIT(IWL_CALIB_TX_IQ)            |
 231                 BIT(IWL_CALIB_BASE_BAND);
 232         if (priv->cfg->need_dc_calib)
 233                 priv->hw_params.calib_init_cfg |= BIT(IWL_CALIB_DC);
 234
 235         priv->hw_params.beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
 236
 237         return 0;
 238 }
 239
 240 static void iwl5150_temperature(struct iwl_priv *priv)
 241 {
 242         u32 vt = 0;
 243         s32 offset =  iwl_temp_calib_to_offset(priv);
 244
 245         vt = le32_to_cpu(priv->statistics.common.temperature);
 246         vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
 247         /* now vt hold the temperature in Kelvin */
 248         priv->temperature = KELVIN_TO_CELSIUS(vt);
 249         iwl_tt_handler(priv);
 250 }
 251
 252 static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
 253                                      struct ieee80211_channel_switch *ch_switch)
 254 {
 255         /*
 256          * MULTI-FIXME
 257          * See iwl_mac_channel_switch.
 258          */
 259         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 260         struct iwl5000_channel_switch_cmd cmd;
 261         const struct iwl_channel_info *ch_info;
 262         u32 switch_time_in_usec, ucode_switch_time;
 263         u16 ch;
 264         u32 tsf_low;
 265         u8 switch_count;
 266         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
 267         struct ieee80211_vif *vif = ctx->vif;
 268         struct iwl_host_cmd hcmd = {
 269                 .id = REPLY_CHANNEL_SWITCH,
 270                 .len = { sizeof(cmd), },
 271                 .flags = CMD_SYNC,
 272                 .data = { &cmd, },
 273         };
 274
 275         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
 276         ch = ch_switch->channel->hw_value;
 277         IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
 278                       ctx->active.channel, ch);
 279         cmd.channel = cpu_to_le16(ch);
 280         cmd.rxon_flags = ctx->staging.flags;
 281         cmd.rxon_filter_flags = ctx->staging.filter_flags;
 282         switch_count = ch_switch->count;
 283         tsf_low = ch_switch->timestamp & 0x0ffffffff;
 284         /*
 285          * calculate the ucode channel switch time
 286          * adding TSF as one of the factor for when to switch
 287          */
 288         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
 289                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
 290                     beacon_interval)) {
 291                         switch_count -= (priv->ucode_beacon_time -
 292                                 tsf_low) / beacon_interval;
 293                 } else
 294                         switch_count = 0;
 295         }
 296         if (switch_count <= 1)
 297                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
 298         else {
 299                 switch_time_in_usec =
 300                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
 301                 ucode_switch_time = iwl_usecs_to_beacons(priv,
 302                                                          switch_time_in_usec,
 303                                                          beacon_interval);
 304                 cmd.switch_time = iwl_add_beacon_time(priv,
 305                                                       priv->ucode_beacon_time,
 306                                                       ucode_switch_time,
 307                                                       beacon_interval);
 308         }
 309         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
 310                       cmd.switch_time);
 311         ch_info = iwl_get_channel_info(priv, priv->band, ch);
 312         if (ch_info)
 313                 cmd.expect_beacon = is_channel_radar(ch_info);
 314         else {
 315                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
 316                         ctx->active.channel, ch);
 317                 return -EFAULT;
 318         }
 319
 320         return iwl_send_cmd_sync(priv, &hcmd);
 321 }
 322
 323 static struct iwl_lib_ops iwl5000_lib = {
 324         .set_hw_params = iwl5000_hw_set_hw_params,
 325         .rx_handler_setup = iwlagn_rx_handler_setup,
 326         .setup_deferred_work = iwlagn_setup_deferred_work,
 327         .is_valid_rtc_data_addr = iwlagn_hw_valid_rtc_data_addr,
 328         .update_chain_flags = iwl_update_chain_flags,
 329         .set_channel_switch = iwl5000_hw_channel_switch,
 330         .apm_ops = {
 331                 .init = iwl_apm_init,
 332                 .config = iwl5000_nic_config,
 333         },
 334         .eeprom_ops = {
 335                 .regulatory_bands = {
 336                         EEPROM_REG_BAND_1_CHANNELS,
 337                         EEPROM_REG_BAND_2_CHANNELS,
 338                         EEPROM_REG_BAND_3_CHANNELS,
 339                         EEPROM_REG_BAND_4_CHANNELS,
 340                         EEPROM_REG_BAND_5_CHANNELS,
 341                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 342                         EEPROM_REG_BAND_52_HT40_CHANNELS
 343                 },
 344                 .query_addr = iwlagn_eeprom_query_addr,
 345         },
 346         .temp_ops = {
 347                 .temperature = iwlagn_temperature,
 348          },
 349 };
 350
 351 static struct iwl_lib_ops iwl5150_lib = {
 352         .set_hw_params = iwl5150_hw_set_hw_params,
 353         .rx_handler_setup = iwlagn_rx_handler_setup,
 354         .setup_deferred_work = iwlagn_setup_deferred_work,
 355         .is_valid_rtc_data_addr = iwlagn_hw_valid_rtc_data_addr,
 356         .update_chain_flags = iwl_update_chain_flags,
 357         .set_channel_switch = iwl5000_hw_channel_switch,
 358         .apm_ops = {
 359                 .init = iwl_apm_init,
 360                 .config = iwl5000_nic_config,
 361         },
 362         .eeprom_ops = {
 363                 .regulatory_bands = {
 364                         EEPROM_REG_BAND_1_CHANNELS,
 365                         EEPROM_REG_BAND_2_CHANNELS,
 366                         EEPROM_REG_BAND_3_CHANNELS,
 367                         EEPROM_REG_BAND_4_CHANNELS,
 368                         EEPROM_REG_BAND_5_CHANNELS,
 369                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 370                         EEPROM_REG_BAND_52_HT40_CHANNELS
 371                 },
 372                 .query_addr = iwlagn_eeprom_query_addr,
 373         },
 374         .temp_ops = {
 375                 .temperature = iwl5150_temperature,
 376          },
 377 };
 378
 379 static const struct iwl_ops iwl5000_ops = {
 380         .lib = &iwl5000_lib,
 381         .hcmd = &iwlagn_hcmd,
 382         .utils = &iwlagn_hcmd_utils,
 383 };
 384
 385 static const struct iwl_ops iwl5150_ops = {
 386         .lib = &iwl5150_lib,
 387         .hcmd = &iwlagn_hcmd,
 388         .utils = &iwlagn_hcmd_utils,
 389 };
 390
 391 static struct iwl_base_params iwl5000_base_params = {
 392         .eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
 393         .num_of_queues = IWLAGN_NUM_QUEUES,
 394         .num_of_ampdu_queues = IWLAGN_NUM_AMPDU_QUEUES,
 395         .pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
 396         .led_compensation = 51,
 397         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
 398         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 399         .chain_noise_scale = 1000,
 400         .wd_timeout = IWL_LONG_WD_TIMEOUT,
 401         .max_event_log_size = 512,
 402 };
 403 static struct iwl_ht_params iwl5000_ht_params = {
 404         .ht_greenfield_support = true,
 405 };
 406
 407 #define IWL_DEVICE_5000                                         \
 408         .fw_name_pre = IWL5000_FW_PRE,                          \
 409         .ucode_api_max = IWL5000_UCODE_API_MAX,                 \
 410         .ucode_api_min = IWL5000_UCODE_API_MIN,                 \
 411         .eeprom_ver = EEPROM_5000_EEPROM_VERSION,               \
 412         .eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,       \
 413         .ops = &iwl5000_ops,                                    \
 414         .base_params = &iwl5000_base_params,                    \
 415         .led_mode = IWL_LED_BLINK
 416
 417 struct iwl_cfg iwl5300_agn_cfg = {
 418         .name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
 419         IWL_DEVICE_5000,
 420         /* at least EEPROM 0x11A has wrong info */
 421         .valid_tx_ant = ANT_ABC,        /* .cfg overwrite */
 422         .valid_rx_ant = ANT_ABC,        /* .cfg overwrite */
 423         .ht_params = &iwl5000_ht_params,
 424 };
 425
 426 struct iwl_cfg iwl5100_bgn_cfg = {
 427         .name = "Intel(R) WiFi Link 5100 BGN",
 428         IWL_DEVICE_5000,
 429         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 430         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 431         .ht_params = &iwl5000_ht_params,
 432 };
 433
 434 struct iwl_cfg iwl5100_abg_cfg = {
 435         .name = "Intel(R) WiFi Link 5100 ABG",
 436         IWL_DEVICE_5000,
 437         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 438         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 439 };
 440
 441 struct iwl_cfg iwl5100_agn_cfg = {
 442         .name = "Intel(R) WiFi Link 5100 AGN",
 443         IWL_DEVICE_5000,
 444         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 445         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 446         .ht_params = &iwl5000_ht_params,
 447 };
 448
 449 struct iwl_cfg iwl5350_agn_cfg = {
 450         .name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
 451         .fw_name_pre = IWL5000_FW_PRE,
 452         .ucode_api_max = IWL5000_UCODE_API_MAX,
 453         .ucode_api_min = IWL5000_UCODE_API_MIN,
 454         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,
 455         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
 456         .ops = &iwl5000_ops,
 457         .base_params = &iwl5000_base_params,
 458         .ht_params = &iwl5000_ht_params,
 459         .led_mode = IWL_LED_BLINK,
 460         .internal_wimax_coex = true,
 461 };
 462
 463 #define IWL_DEVICE_5150                                         \
 464         .fw_name_pre = IWL5150_FW_PRE,                          \
 465         .ucode_api_max = IWL5150_UCODE_API_MAX,                 \
 466         .ucode_api_min = IWL5150_UCODE_API_MIN,                 \
 467         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,               \
 468         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,       \
 469         .ops = &iwl5150_ops,                                    \
 470         .base_params = &iwl5000_base_params,                    \
 471         .need_dc_calib = true,                                  \
 472         .led_mode = IWL_LED_BLINK,                              \
 473         .internal_wimax_coex = true
 474
 475 struct iwl_cfg iwl5150_agn_cfg = {
 476         .name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
 477         IWL_DEVICE_5150,
 478         .ht_params = &iwl5000_ht_params,
 479
 480 };
 481
 482 struct iwl_cfg iwl5150_abg_cfg = {
 483         .name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
 484         IWL_DEVICE_5150,
 485 };
 486
 487 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
 488 MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_MAX));