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
  50 /* Highest firmware API version supported */
  51 #define IWL5000_UCODE_API_MAX 5
  52 #define IWL5150_UCODE_API_MAX 2
  53
  54 /* Lowest firmware API version supported */
  55 #define IWL5000_UCODE_API_MIN 1
  56 #define IWL5150_UCODE_API_MIN 1
  57
  58 #define IWL5000_FW_PRE "iwlwifi-5000-"
  59 #define IWL5000_MODULE_FIRMWARE(api) IWL5000_FW_PRE __stringify(api) ".ucode"
  60
  61 #define IWL5150_FW_PRE "iwlwifi-5150-"
  62 #define IWL5150_MODULE_FIRMWARE(api) IWL5150_FW_PRE __stringify(api) ".ucode"
  63
  64 /* NIC configuration for 5000 series */
  65 static void iwl5000_nic_config(struct iwl_priv *priv)
  66 {
  67         unsigned long flags;
  68
  69         iwl_rf_config(priv);
  70
  71         spin_lock_irqsave(&priv->lock, flags);
  72
  73         /* W/A : NIC is stuck in a reset state after Early PCIe power off
  74          * (PCIe power is lost before PERST# is asserted),
  75          * causing ME FW to lose ownership and not being able to obtain it back.
  76          */
  77         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
  78                                 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
  79                                 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
  80
  81
  82         spin_unlock_irqrestore(&priv->lock, flags);
  83 }
  84
  85 static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
  86         .min_nrg_cck = 100,
  87         .max_nrg_cck = 0, /* not used, set to 0 */
  88         .auto_corr_min_ofdm = 90,
  89         .auto_corr_min_ofdm_mrc = 170,
  90         .auto_corr_min_ofdm_x1 = 105,
  91         .auto_corr_min_ofdm_mrc_x1 = 220,
  92
  93         .auto_corr_max_ofdm = 120,
  94         .auto_corr_max_ofdm_mrc = 210,
  95         .auto_corr_max_ofdm_x1 = 120,
  96         .auto_corr_max_ofdm_mrc_x1 = 240,
  97
  98         .auto_corr_min_cck = 125,
  99         .auto_corr_max_cck = 200,
 100         .auto_corr_min_cck_mrc = 200,
 101         .auto_corr_max_cck_mrc = 400,
 102         .nrg_th_cck = 100,
 103         .nrg_th_ofdm = 100,
 104
 105         .barker_corr_th_min = 190,
 106         .barker_corr_th_min_mrc = 390,
 107         .nrg_th_cca = 62,
 108 };
 109
 110 static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
 111         .min_nrg_cck = 95,
 112         .max_nrg_cck = 0, /* not used, set to 0 */
 113         .auto_corr_min_ofdm = 90,
 114         .auto_corr_min_ofdm_mrc = 170,
 115         .auto_corr_min_ofdm_x1 = 105,
 116         .auto_corr_min_ofdm_mrc_x1 = 220,
 117
 118         .auto_corr_max_ofdm = 120,
 119         .auto_corr_max_ofdm_mrc = 210,
 120         /* max = min for performance bug in 5150 DSP */
 121         .auto_corr_max_ofdm_x1 = 105,
 122         .auto_corr_max_ofdm_mrc_x1 = 220,
 123
 124         .auto_corr_min_cck = 125,
 125         .auto_corr_max_cck = 200,
 126         .auto_corr_min_cck_mrc = 170,
 127         .auto_corr_max_cck_mrc = 400,
 128         .nrg_th_cck = 95,
 129         .nrg_th_ofdm = 95,
 130
 131         .barker_corr_th_min = 190,
 132         .barker_corr_th_min_mrc = 390,
 133         .nrg_th_cca = 62,
 134 };
 135
 136 static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
 137 {
 138         const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
 139         s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
 140                         iwl_temp_calib_to_offset(priv);
 141
 142         priv->hw_params.ct_kill_threshold = threshold * volt2temp_coef;
 143 }
 144
 145 static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
 146 {
 147         /* want Celsius */
 148         priv->hw_params.ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
 149 }
 150
 151 static int iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 152 {
 153         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 154             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 155                 priv->cfg->base_params->num_of_queues =
 156                         iwlagn_mod_params.num_of_queues;
 157
 158         priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
 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
 172         priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 173         priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 174         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
 175         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 176
 177         iwl5000_set_ct_threshold(priv);
 178
 179         /* Set initial sensitivity parameters */
 180         /* Set initial calibration set */
 181         priv->hw_params.sens = &iwl5000_sensitivity;
 182         priv->hw_params.calib_init_cfg =
 183                 BIT(IWL_CALIB_XTAL)             |
 184                 BIT(IWL_CALIB_LO)               |
 185                 BIT(IWL_CALIB_TX_IQ)            |
 186                 BIT(IWL_CALIB_TX_IQ_PERD)       |
 187                 BIT(IWL_CALIB_BASE_BAND);
 188
 189         priv->hw_params.beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
 190
 191         return 0;
 192 }
 193
 194 static int iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 195 {
 196         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 197             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 198                 priv->cfg->base_params->num_of_queues =
 199                         iwlagn_mod_params.num_of_queues;
 200
 201         priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
 202         priv->hw_params.scd_bc_tbls_size =
 203                         priv->cfg->base_params->num_of_queues *
 204                         sizeof(struct iwlagn_scd_bc_tbl);
 205         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
 206         priv->hw_params.max_stations = IWLAGN_STATION_COUNT;
 207         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 208
 209         priv->hw_params.max_data_size = IWLAGN_RTC_DATA_SIZE;
 210         priv->hw_params.max_inst_size = IWLAGN_RTC_INST_SIZE;
 211
 212         priv->hw_params.ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 213                                         BIT(IEEE80211_BAND_5GHZ);
 214
 215         priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 216         priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 217         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
 218         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 219
 220         iwl5150_set_ct_threshold(priv);
 221
 222         /* Set initial sensitivity parameters */
 223         /* Set initial calibration set */
 224         priv->hw_params.sens = &iwl5150_sensitivity;
 225         priv->hw_params.calib_init_cfg =
 226                 BIT(IWL_CALIB_LO)               |
 227                 BIT(IWL_CALIB_TX_IQ)            |
 228                 BIT(IWL_CALIB_BASE_BAND);
 229         if (priv->cfg->need_dc_calib)
 230                 priv->hw_params.calib_init_cfg |= BIT(IWL_CALIB_DC);
 231
 232         priv->hw_params.beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
 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 iwl_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 trans_send_cmd(&priv->trans, &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         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
 363         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 364         .chain_noise_scale = 1000,
 365         .wd_timeout = IWL_LONG_WD_TIMEOUT,
 366         .max_event_log_size = 512,
 367         .no_idle_support = true,
 368 };
 369 static struct iwl_ht_params iwl5000_ht_params = {
 370         .ht_greenfield_support = true,
 371 };
 372
 373 #define IWL_DEVICE_5000                                         \
 374         .fw_name_pre = IWL5000_FW_PRE,                          \
 375         .ucode_api_max = IWL5000_UCODE_API_MAX,                 \
 376         .ucode_api_min = IWL5000_UCODE_API_MIN,                 \
 377         .eeprom_ver = EEPROM_5000_EEPROM_VERSION,               \
 378         .eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,       \
 379         .lib = &iwl5000_lib,                                    \
 380         .base_params = &iwl5000_base_params,                    \
 381         .led_mode = IWL_LED_BLINK
 382
 383 struct iwl_cfg iwl5300_agn_cfg = {
 384         .name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
 385         IWL_DEVICE_5000,
 386         /* at least EEPROM 0x11A has wrong info */
 387         .valid_tx_ant = ANT_ABC,        /* .cfg overwrite */
 388         .valid_rx_ant = ANT_ABC,        /* .cfg overwrite */
 389         .ht_params = &iwl5000_ht_params,
 390 };
 391
 392 struct iwl_cfg iwl5100_bgn_cfg = {
 393         .name = "Intel(R) WiFi Link 5100 BGN",
 394         IWL_DEVICE_5000,
 395         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 396         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 397         .ht_params = &iwl5000_ht_params,
 398 };
 399
 400 struct iwl_cfg iwl5100_abg_cfg = {
 401         .name = "Intel(R) WiFi Link 5100 ABG",
 402         IWL_DEVICE_5000,
 403         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 404         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 405 };
 406
 407 struct iwl_cfg iwl5100_agn_cfg = {
 408         .name = "Intel(R) WiFi Link 5100 AGN",
 409         IWL_DEVICE_5000,
 410         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 411         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 412         .ht_params = &iwl5000_ht_params,
 413 };
 414
 415 struct iwl_cfg iwl5350_agn_cfg = {
 416         .name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
 417         .fw_name_pre = IWL5000_FW_PRE,
 418         .ucode_api_max = IWL5000_UCODE_API_MAX,
 419         .ucode_api_min = IWL5000_UCODE_API_MIN,
 420         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,
 421         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
 422         .lib = &iwl5000_lib,
 423         .base_params = &iwl5000_base_params,
 424         .ht_params = &iwl5000_ht_params,
 425         .led_mode = IWL_LED_BLINK,
 426         .internal_wimax_coex = true,
 427 };
 428
 429 #define IWL_DEVICE_5150                                         \
 430         .fw_name_pre = IWL5150_FW_PRE,                          \
 431         .ucode_api_max = IWL5150_UCODE_API_MAX,                 \
 432         .ucode_api_min = IWL5150_UCODE_API_MIN,                 \
 433         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,               \
 434         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,       \
 435         .lib = &iwl5150_lib,                                    \
 436         .base_params = &iwl5000_base_params,                    \
 437         .need_dc_calib = true,                                  \
 438         .led_mode = IWL_LED_BLINK,                              \
 439         .internal_wimax_coex = true
 440
 441 struct iwl_cfg iwl5150_agn_cfg = {
 442         .name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
 443         IWL_DEVICE_5150,
 444         .ht_params = &iwl5000_ht_params,
 445
 446 };
 447
 448 struct iwl_cfg iwl5150_abg_cfg = {
 449         .name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
 450         IWL_DEVICE_5150,
 451 };
 452
 453 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
 454 MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_MAX));