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-helpers.h"
  44 #include "iwl-agn.h"
  45 #include "iwl-agn-hw.h"
  46 #include "iwl-trans.h"
  47 #include "iwl-shared.h"
  48 #include "iwl-cfg.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->shrd->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(bus(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->shrd->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 #define IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF   (-5)
 137
 138 static s32 iwl_temp_calib_to_offset(struct iwl_priv *priv)
 139 {
 140         u16 temperature, voltage;
 141         __le16 *temp_calib = (__le16 *)iwl_eeprom_query_addr(priv,
 142                                 EEPROM_KELVIN_TEMPERATURE);
 143
 144         temperature = le16_to_cpu(temp_calib[0]);
 145         voltage = le16_to_cpu(temp_calib[1]);
 146
 147         /* offset = temp - volt / coeff */
 148         return (s32)(temperature - voltage / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF);
 149 }
 150
 151 static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
 152 {
 153         const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
 154         s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
 155                         iwl_temp_calib_to_offset(priv);
 156
 157         hw_params(priv).ct_kill_threshold = threshold * volt2temp_coef;
 158 }
 159
 160 static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
 161 {
 162         /* want Celsius */
 163         hw_params(priv).ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
 164 }
 165
 166 static int iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 167 {
 168         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 169             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 170                 priv->cfg->base_params->num_of_queues =
 171                         iwlagn_mod_params.num_of_queues;
 172
 173         hw_params(priv).max_txq_num = priv->cfg->base_params->num_of_queues;
 174         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 175
 176         hw_params(priv).max_data_size = IWLAGN_RTC_DATA_SIZE;
 177         hw_params(priv).max_inst_size = IWLAGN_RTC_INST_SIZE;
 178
 179         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 180                                         BIT(IEEE80211_BAND_5GHZ);
 181
 182         hw_params(priv).tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 183         hw_params(priv).rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 184         hw_params(priv).valid_tx_ant = priv->cfg->valid_tx_ant;
 185         hw_params(priv).valid_rx_ant = priv->cfg->valid_rx_ant;
 186
 187         iwl5000_set_ct_threshold(priv);
 188
 189         /* Set initial sensitivity parameters */
 190         /* Set initial calibration set */
 191         hw_params(priv).sens = &iwl5000_sensitivity;
 192         hw_params(priv).calib_init_cfg =
 193                 BIT(IWL_CALIB_XTAL)             |
 194                 BIT(IWL_CALIB_LO)               |
 195                 BIT(IWL_CALIB_TX_IQ)            |
 196                 BIT(IWL_CALIB_TX_IQ_PERD)       |
 197                 BIT(IWL_CALIB_BASE_BAND);
 198
 199         return 0;
 200 }
 201
 202 static int iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 203 {
 204         if (iwlagn_mod_params.num_of_queues >= IWL_MIN_NUM_QUEUES &&
 205             iwlagn_mod_params.num_of_queues <= IWLAGN_NUM_QUEUES)
 206                 priv->cfg->base_params->num_of_queues =
 207                         iwlagn_mod_params.num_of_queues;
 208
 209         hw_params(priv).max_txq_num = priv->cfg->base_params->num_of_queues;
 210         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 211
 212         hw_params(priv).max_data_size = IWLAGN_RTC_DATA_SIZE;
 213         hw_params(priv).max_inst_size = IWLAGN_RTC_INST_SIZE;
 214
 215         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 216                                         BIT(IEEE80211_BAND_5GHZ);
 217
 218         hw_params(priv).tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
 219         hw_params(priv).rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
 220         hw_params(priv).valid_tx_ant = priv->cfg->valid_tx_ant;
 221         hw_params(priv).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         hw_params(priv).sens = &iwl5150_sensitivity;
 228         hw_params(priv).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                 hw_params(priv).calib_init_cfg |= BIT(IWL_CALIB_DC);
 234
 235         return 0;
 236 }
 237
 238 static void iwl5150_temperature(struct iwl_priv *priv)
 239 {
 240         u32 vt = 0;
 241         s32 offset =  iwl_temp_calib_to_offset(priv);
 242
 243         vt = le32_to_cpu(priv->statistics.common.temperature);
 244         vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
 245         /* now vt hold the temperature in Kelvin */
 246         priv->temperature = KELVIN_TO_CELSIUS(vt);
 247         iwl_tt_handler(priv);
 248 }
 249
 250 static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
 251                                      struct ieee80211_channel_switch *ch_switch)
 252 {
 253         /*
 254          * MULTI-FIXME
 255          * See iwlagn_mac_channel_switch.
 256          */
 257         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 258         struct iwl5000_channel_switch_cmd cmd;
 259         const struct iwl_channel_info *ch_info;
 260         u32 switch_time_in_usec, ucode_switch_time;
 261         u16 ch;
 262         u32 tsf_low;
 263         u8 switch_count;
 264         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
 265         struct ieee80211_vif *vif = ctx->vif;
 266         struct iwl_host_cmd hcmd = {
 267                 .id = REPLY_CHANNEL_SWITCH,
 268                 .len = { sizeof(cmd), },
 269                 .flags = CMD_SYNC,
 270                 .data = { &cmd, },
 271         };
 272
 273         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
 274         ch = ch_switch->channel->hw_value;
 275         IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
 276                       ctx->active.channel, ch);
 277         cmd.channel = cpu_to_le16(ch);
 278         cmd.rxon_flags = ctx->staging.flags;
 279         cmd.rxon_filter_flags = ctx->staging.filter_flags;
 280         switch_count = ch_switch->count;
 281         tsf_low = ch_switch->timestamp & 0x0ffffffff;
 282         /*
 283          * calculate the ucode channel switch time
 284          * adding TSF as one of the factor for when to switch
 285          */
 286         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
 287                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
 288                     beacon_interval)) {
 289                         switch_count -= (priv->ucode_beacon_time -
 290                                 tsf_low) / beacon_interval;
 291                 } else
 292                         switch_count = 0;
 293         }
 294         if (switch_count <= 1)
 295                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
 296         else {
 297                 switch_time_in_usec =
 298                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
 299                 ucode_switch_time = iwl_usecs_to_beacons(priv,
 300                                                          switch_time_in_usec,
 301                                                          beacon_interval);
 302                 cmd.switch_time = iwl_add_beacon_time(priv,
 303                                                       priv->ucode_beacon_time,
 304                                                       ucode_switch_time,
 305                                                       beacon_interval);
 306         }
 307         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
 308                       cmd.switch_time);
 309         ch_info = iwl_get_channel_info(priv, priv->band, ch);
 310         if (ch_info)
 311                 cmd.expect_beacon = is_channel_radar(ch_info);
 312         else {
 313                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
 314                         ctx->active.channel, ch);
 315                 return -EFAULT;
 316         }
 317
 318         return iwl_trans_send_cmd(trans(priv), &hcmd);
 319 }
 320
 321 static struct iwl_lib_ops iwl5000_lib = {
 322         .set_hw_params = iwl5000_hw_set_hw_params,
 323         .set_channel_switch = iwl5000_hw_channel_switch,
 324         .nic_config = iwl5000_nic_config,
 325         .eeprom_ops = {
 326                 .regulatory_bands = {
 327                         EEPROM_REG_BAND_1_CHANNELS,
 328                         EEPROM_REG_BAND_2_CHANNELS,
 329                         EEPROM_REG_BAND_3_CHANNELS,
 330                         EEPROM_REG_BAND_4_CHANNELS,
 331                         EEPROM_REG_BAND_5_CHANNELS,
 332                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 333                         EEPROM_REG_BAND_52_HT40_CHANNELS
 334                 },
 335         },
 336         .temperature = iwlagn_temperature,
 337 };
 338
 339 static struct iwl_lib_ops iwl5150_lib = {
 340         .set_hw_params = iwl5150_hw_set_hw_params,
 341         .set_channel_switch = iwl5000_hw_channel_switch,
 342         .nic_config = iwl5000_nic_config,
 343         .eeprom_ops = {
 344                 .regulatory_bands = {
 345                         EEPROM_REG_BAND_1_CHANNELS,
 346                         EEPROM_REG_BAND_2_CHANNELS,
 347                         EEPROM_REG_BAND_3_CHANNELS,
 348                         EEPROM_REG_BAND_4_CHANNELS,
 349                         EEPROM_REG_BAND_5_CHANNELS,
 350                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 351                         EEPROM_REG_BAND_52_HT40_CHANNELS
 352                 },
 353         },
 354         .temperature = iwl5150_temperature,
 355 };
 356
 357 static struct iwl_base_params iwl5000_base_params = {
 358         .eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
 359         .num_of_queues = IWLAGN_NUM_QUEUES,
 360         .num_of_ampdu_queues = IWLAGN_NUM_AMPDU_QUEUES,
 361         .pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
 362         .led_compensation = 51,
 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));