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-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(bus(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_priv *priv)
 138 {
 139         u16 temperature, voltage;
 140         __le16 *temp_calib = (__le16 *)iwl_eeprom_query_addr(priv,
 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);
 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 int 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                 priv->cfg->base_params->num_of_queues =
 170                         iwlagn_mod_params.num_of_queues;
 171
 172         hw_params(priv).max_txq_num = priv->cfg->base_params->num_of_queues;
 173         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 174
 175         hw_params(priv).max_data_size = IWLAGN_RTC_DATA_SIZE;
 176         hw_params(priv).max_inst_size = IWLAGN_RTC_INST_SIZE;
 177
 178         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 179                                         BIT(IEEE80211_BAND_5GHZ);
 180
 181         hw_params(priv).tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 182         hw_params(priv).rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 183         hw_params(priv).valid_tx_ant = priv->cfg->valid_tx_ant;
 184         hw_params(priv).valid_rx_ant = priv->cfg->valid_rx_ant;
 185
 186         iwl5000_set_ct_threshold(priv);
 187
 188         /* Set initial sensitivity parameters */
 189         /* Set initial calibration set */
 190         hw_params(priv).sens = &iwl5000_sensitivity;
 191         hw_params(priv).calib_init_cfg =
 192                 BIT(IWL_CALIB_XTAL)             |
 193                 BIT(IWL_CALIB_LO)               |
 194                 BIT(IWL_CALIB_TX_IQ)            |
 195                 BIT(IWL_CALIB_TX_IQ_PERD)       |
 196                 BIT(IWL_CALIB_BASE_BAND);
 197
 198         return 0;
 199 }
 200
 201 static int iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 202 {
 203         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 204             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 205                 priv->cfg->base_params->num_of_queues =
 206                         iwlagn_mod_params.num_of_queues;
 207
 208         hw_params(priv).max_txq_num = priv->cfg->base_params->num_of_queues;
 209         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 210
 211         hw_params(priv).max_data_size = IWLAGN_RTC_DATA_SIZE;
 212         hw_params(priv).max_inst_size = IWLAGN_RTC_INST_SIZE;
 213
 214         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 215                                         BIT(IEEE80211_BAND_5GHZ);
 216
 217         hw_params(priv).tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 218         hw_params(priv).rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 219         hw_params(priv).valid_tx_ant = priv->cfg->valid_tx_ant;
 220         hw_params(priv).valid_rx_ant = priv->cfg->valid_rx_ant;
 221
 222         iwl5150_set_ct_threshold(priv);
 223
 224         /* Set initial sensitivity parameters */
 225         /* Set initial calibration set */
 226         hw_params(priv).sens = &iwl5150_sensitivity;
 227         hw_params(priv).calib_init_cfg =
 228                 BIT(IWL_CALIB_LO)               |
 229                 BIT(IWL_CALIB_TX_IQ)            |
 230                 BIT(IWL_CALIB_BASE_BAND);
 231         if (priv->cfg->need_dc_calib)
 232                 hw_params(priv).calib_init_cfg |= BIT(IWL_CALIB_DC);
 233
 234         return 0;
 235 }
 236
 237 static void iwl5150_temperature(struct iwl_priv *priv)
 238 {
 239         u32 vt = 0;
 240         s32 offset =  iwl_temp_calib_to_offset(priv);
 241
 242         vt = le32_to_cpu(priv->statistics.common.temperature);
 243         vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
 244         /* now vt hold the temperature in Kelvin */
 245         priv->temperature = KELVIN_TO_CELSIUS(vt);
 246         iwl_tt_handler(priv);
 247 }
 248
 249 static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
 250                                      struct ieee80211_channel_switch *ch_switch)
 251 {
 252         /*
 253          * MULTI-FIXME
 254          * See iwlagn_mac_channel_switch.
 255          */
 256         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 257         struct iwl5000_channel_switch_cmd cmd;
 258         const struct iwl_channel_info *ch_info;
 259         u32 switch_time_in_usec, ucode_switch_time;
 260         u16 ch;
 261         u32 tsf_low;
 262         u8 switch_count;
 263         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
 264         struct ieee80211_vif *vif = ctx->vif;
 265         struct iwl_host_cmd hcmd = {
 266                 .id = REPLY_CHANNEL_SWITCH,
 267                 .len = { sizeof(cmd), },
 268                 .flags = CMD_SYNC,
 269                 .data = { &cmd, },
 270         };
 271
 272         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
 273         ch = ch_switch->channel->hw_value;
 274         IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
 275                       ctx->active.channel, ch);
 276         cmd.channel = cpu_to_le16(ch);
 277         cmd.rxon_flags = ctx->staging.flags;
 278         cmd.rxon_filter_flags = ctx->staging.filter_flags;
 279         switch_count = ch_switch->count;
 280         tsf_low = ch_switch->timestamp & 0x0ffffffff;
 281         /*
 282          * calculate the ucode channel switch time
 283          * adding TSF as one of the factor for when to switch
 284          */
 285         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
 286                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
 287                     beacon_interval)) {
 288                         switch_count -= (priv->ucode_beacon_time -
 289                                 tsf_low) / beacon_interval;
 290                 } else
 291                         switch_count = 0;
 292         }
 293         if (switch_count <= 1)
 294                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
 295         else {
 296                 switch_time_in_usec =
 297                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
 298                 ucode_switch_time = iwl_usecs_to_beacons(priv,
 299                                                          switch_time_in_usec,
 300                                                          beacon_interval);
 301                 cmd.switch_time = iwl_add_beacon_time(priv,
 302                                                       priv->ucode_beacon_time,
 303                                                       ucode_switch_time,
 304                                                       beacon_interval);
 305         }
 306         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
 307                       cmd.switch_time);
 308         ch_info = iwl_get_channel_info(priv, priv->band, ch);
 309         if (ch_info)
 310                 cmd.expect_beacon = is_channel_radar(ch_info);
 311         else {
 312                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
 313                         ctx->active.channel, ch);
 314                 return -EFAULT;
 315         }
 316
 317         return iwl_trans_send_cmd(trans(priv), &hcmd);
 318 }
 319
 320 static struct iwl_lib_ops iwl5000_lib = {
 321         .set_hw_params = iwl5000_hw_set_hw_params,
 322         .set_channel_switch = iwl5000_hw_channel_switch,
 323         .nic_config = iwl5000_nic_config,
 324         .eeprom_ops = {
 325                 .regulatory_bands = {
 326                         EEPROM_REG_BAND_1_CHANNELS,
 327                         EEPROM_REG_BAND_2_CHANNELS,
 328                         EEPROM_REG_BAND_3_CHANNELS,
 329                         EEPROM_REG_BAND_4_CHANNELS,
 330                         EEPROM_REG_BAND_5_CHANNELS,
 331                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 332                         EEPROM_REG_BAND_52_HT40_CHANNELS
 333                 },
 334         },
 335         .temperature = iwlagn_temperature,
 336 };
 337
 338 static struct iwl_lib_ops iwl5150_lib = {
 339         .set_hw_params = iwl5150_hw_set_hw_params,
 340         .set_channel_switch = iwl5000_hw_channel_switch,
 341         .nic_config = iwl5000_nic_config,
 342         .eeprom_ops = {
 343                 .regulatory_bands = {
 344                         EEPROM_REG_BAND_1_CHANNELS,
 345                         EEPROM_REG_BAND_2_CHANNELS,
 346                         EEPROM_REG_BAND_3_CHANNELS,
 347                         EEPROM_REG_BAND_4_CHANNELS,
 348                         EEPROM_REG_BAND_5_CHANNELS,
 349                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 350                         EEPROM_REG_BAND_52_HT40_CHANNELS
 351                 },
 352         },
 353         .temperature = iwl5150_temperature,
 354 };
 355
 356 static struct iwl_base_params iwl5000_base_params = {
 357         .eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
 358         .num_of_queues = IWLAGN_NUM_QUEUES,
 359         .num_of_ampdu_queues = IWLAGN_NUM_AMPDU_QUEUES,
 360         .pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
 361         .led_compensation = 51,
 362         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 363         .chain_noise_scale = 1000,
 364         .wd_timeout = IWL_LONG_WD_TIMEOUT,
 365         .max_event_log_size = 512,
 366         .no_idle_support = true,
 367 };
 368 static struct iwl_ht_params iwl5000_ht_params = {
 369         .ht_greenfield_support = true,
 370 };
 371
 372 #define IWL_DEVICE_5000                                         \
 373         .fw_name_pre = IWL5000_FW_PRE,                          \
 374         .ucode_api_max = IWL5000_UCODE_API_MAX,                 \
 375         .ucode_api_min = IWL5000_UCODE_API_MIN,                 \
 376         .eeprom_ver = EEPROM_5000_EEPROM_VERSION,               \
 377         .eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,       \
 378         .lib = &iwl5000_lib,                                    \
 379         .base_params = &iwl5000_base_params,                    \
 380         .led_mode = IWL_LED_BLINK
 381
 382 struct iwl_cfg iwl5300_agn_cfg = {
 383         .name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
 384         IWL_DEVICE_5000,
 385         /* at least EEPROM 0x11A has wrong info */
 386         .valid_tx_ant = ANT_ABC,        /* .cfg overwrite */
 387         .valid_rx_ant = ANT_ABC,        /* .cfg overwrite */
 388         .ht_params = &iwl5000_ht_params,
 389 };
 390
 391 struct iwl_cfg iwl5100_bgn_cfg = {
 392         .name = "Intel(R) WiFi Link 5100 BGN",
 393         IWL_DEVICE_5000,
 394         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 395         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 396         .ht_params = &iwl5000_ht_params,
 397 };
 398
 399 struct iwl_cfg iwl5100_abg_cfg = {
 400         .name = "Intel(R) WiFi Link 5100 ABG",
 401         IWL_DEVICE_5000,
 402         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 403         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 404 };
 405
 406 struct iwl_cfg iwl5100_agn_cfg = {
 407         .name = "Intel(R) WiFi Link 5100 AGN",
 408         IWL_DEVICE_5000,
 409         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 410         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 411         .ht_params = &iwl5000_ht_params,
 412 };
 413
 414 struct iwl_cfg iwl5350_agn_cfg = {
 415         .name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
 416         .fw_name_pre = IWL5000_FW_PRE,
 417         .ucode_api_max = IWL5000_UCODE_API_MAX,
 418         .ucode_api_min = IWL5000_UCODE_API_MIN,
 419         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,
 420         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
 421         .lib = &iwl5000_lib,
 422         .base_params = &iwl5000_base_params,
 423         .ht_params = &iwl5000_ht_params,
 424         .led_mode = IWL_LED_BLINK,
 425         .internal_wimax_coex = true,
 426 };
 427
 428 #define IWL_DEVICE_5150                                         \
 429         .fw_name_pre = IWL5150_FW_PRE,                          \
 430         .ucode_api_max = IWL5150_UCODE_API_MAX,                 \
 431         .ucode_api_min = IWL5150_UCODE_API_MIN,                 \
 432         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,               \
 433         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,       \
 434         .lib = &iwl5150_lib,                                    \
 435         .base_params = &iwl5000_base_params,                    \
 436         .need_dc_calib = true,                                  \
 437         .led_mode = IWL_LED_BLINK,                              \
 438         .internal_wimax_coex = true
 439
 440 struct iwl_cfg iwl5150_agn_cfg = {
 441         .name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
 442         IWL_DEVICE_5150,
 443         .ht_params = &iwl5000_ht_params,
 444
 445 };
 446
 447 struct iwl_cfg iwl5150_abg_cfg = {
 448         .name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
 449         IWL_DEVICE_5150,
 450 };
 451
 452 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
 453 MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_MAX));