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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2012 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 #include "iwl-prph.h"
  49
  50 /* Highest firmware API version supported */
  51 #define IWL5000_UCODE_API_MAX 5
  52 #define IWL5150_UCODE_API_MAX 2
  53
  54 /* Oldest version we won't warn about */
  55 #define IWL5000_UCODE_API_OK 5
  56 #define IWL5150_UCODE_API_OK 2
  57
  58 /* Lowest firmware API version supported */
  59 #define IWL5000_UCODE_API_MIN 1
  60 #define IWL5150_UCODE_API_MIN 1
  61
  62 #define IWL5000_FW_PRE "iwlwifi-5000-"
  63 #define IWL5000_MODULE_FIRMWARE(api) IWL5000_FW_PRE __stringify(api) ".ucode"
  64
  65 #define IWL5150_FW_PRE "iwlwifi-5150-"
  66 #define IWL5150_MODULE_FIRMWARE(api) IWL5150_FW_PRE __stringify(api) ".ucode"
  67
  68 /* NIC configuration for 5000 series */
  69 static void iwl5000_nic_config(struct iwl_priv *priv)
  70 {
  71         iwl_rf_config(priv);
  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(trans(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 static const struct iwl_sensitivity_ranges iwl5000_sensitivity = {
  83         .min_nrg_cck = 100,
  84         .auto_corr_min_ofdm = 90,
  85         .auto_corr_min_ofdm_mrc = 170,
  86         .auto_corr_min_ofdm_x1 = 105,
  87         .auto_corr_min_ofdm_mrc_x1 = 220,
  88
  89         .auto_corr_max_ofdm = 120,
  90         .auto_corr_max_ofdm_mrc = 210,
  91         .auto_corr_max_ofdm_x1 = 120,
  92         .auto_corr_max_ofdm_mrc_x1 = 240,
  93
  94         .auto_corr_min_cck = 125,
  95         .auto_corr_max_cck = 200,
  96         .auto_corr_min_cck_mrc = 200,
  97         .auto_corr_max_cck_mrc = 400,
  98         .nrg_th_cck = 100,
  99         .nrg_th_ofdm = 100,
 100
 101         .barker_corr_th_min = 190,
 102         .barker_corr_th_min_mrc = 390,
 103         .nrg_th_cca = 62,
 104 };
 105
 106 static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
 107         .min_nrg_cck = 95,
 108         .auto_corr_min_ofdm = 90,
 109         .auto_corr_min_ofdm_mrc = 170,
 110         .auto_corr_min_ofdm_x1 = 105,
 111         .auto_corr_min_ofdm_mrc_x1 = 220,
 112
 113         .auto_corr_max_ofdm = 120,
 114         .auto_corr_max_ofdm_mrc = 210,
 115         /* max = min for performance bug in 5150 DSP */
 116         .auto_corr_max_ofdm_x1 = 105,
 117         .auto_corr_max_ofdm_mrc_x1 = 220,
 118
 119         .auto_corr_min_cck = 125,
 120         .auto_corr_max_cck = 200,
 121         .auto_corr_min_cck_mrc = 170,
 122         .auto_corr_max_cck_mrc = 400,
 123         .nrg_th_cck = 95,
 124         .nrg_th_ofdm = 95,
 125
 126         .barker_corr_th_min = 190,
 127         .barker_corr_th_min_mrc = 390,
 128         .nrg_th_cca = 62,
 129 };
 130
 131 #define IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF   (-5)
 132
 133 static s32 iwl_temp_calib_to_offset(struct iwl_shared *shrd)
 134 {
 135         u16 temperature, voltage;
 136         __le16 *temp_calib = (__le16 *)iwl_eeprom_query_addr(shrd,
 137                                 EEPROM_KELVIN_TEMPERATURE);
 138
 139         temperature = le16_to_cpu(temp_calib[0]);
 140         voltage = le16_to_cpu(temp_calib[1]);
 141
 142         /* offset = temp - volt / coeff */
 143         return (s32)(temperature - voltage / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF);
 144 }
 145
 146 static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
 147 {
 148         const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
 149         s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
 150                         iwl_temp_calib_to_offset(priv->shrd);
 151
 152         hw_params(priv).ct_kill_threshold = threshold * volt2temp_coef;
 153 }
 154
 155 static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
 156 {
 157         /* want Celsius */
 158         hw_params(priv).ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
 159 }
 160
 161 static void iwl5000_hw_set_hw_params(struct iwl_priv *priv)
 162 {
 163         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 164                                         BIT(IEEE80211_BAND_5GHZ);
 165
 166         hw_params(priv).tx_chains_num =
 167                 num_of_ant(hw_params(priv).valid_tx_ant);
 168         hw_params(priv).rx_chains_num =
 169                 num_of_ant(hw_params(priv).valid_rx_ant);
 170
 171         iwl5000_set_ct_threshold(priv);
 172
 173         /* Set initial sensitivity parameters */
 174         hw_params(priv).sens = &iwl5000_sensitivity;
 175 }
 176
 177 static void iwl5150_hw_set_hw_params(struct iwl_priv *priv)
 178 {
 179         hw_params(priv).ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
 180                                         BIT(IEEE80211_BAND_5GHZ);
 181
 182         hw_params(priv).tx_chains_num =
 183                 num_of_ant(hw_params(priv).valid_tx_ant);
 184         hw_params(priv).rx_chains_num =
 185                 num_of_ant(hw_params(priv).valid_rx_ant);
 186
 187         iwl5150_set_ct_threshold(priv);
 188
 189         /* Set initial sensitivity parameters */
 190         hw_params(priv).sens = &iwl5150_sensitivity;
 191 }
 192
 193 static void iwl5150_temperature(struct iwl_priv *priv)
 194 {
 195         u32 vt = 0;
 196         s32 offset =  iwl_temp_calib_to_offset(priv->shrd);
 197
 198         vt = le32_to_cpu(priv->statistics.common.temperature);
 199         vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
 200         /* now vt hold the temperature in Kelvin */
 201         priv->temperature = KELVIN_TO_CELSIUS(vt);
 202         iwl_tt_handler(priv);
 203 }
 204
 205 static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
 206                                      struct ieee80211_channel_switch *ch_switch)
 207 {
 208         /*
 209          * MULTI-FIXME
 210          * See iwlagn_mac_channel_switch.
 211          */
 212         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 213         struct iwl5000_channel_switch_cmd cmd;
 214         const struct iwl_channel_info *ch_info;
 215         u32 switch_time_in_usec, ucode_switch_time;
 216         u16 ch;
 217         u32 tsf_low;
 218         u8 switch_count;
 219         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
 220         struct ieee80211_vif *vif = ctx->vif;
 221         struct iwl_host_cmd hcmd = {
 222                 .id = REPLY_CHANNEL_SWITCH,
 223                 .len = { sizeof(cmd), },
 224                 .flags = CMD_SYNC,
 225                 .data = { &cmd, },
 226         };
 227
 228         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
 229         ch = ch_switch->channel->hw_value;
 230         IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
 231                       ctx->active.channel, ch);
 232         cmd.channel = cpu_to_le16(ch);
 233         cmd.rxon_flags = ctx->staging.flags;
 234         cmd.rxon_filter_flags = ctx->staging.filter_flags;
 235         switch_count = ch_switch->count;
 236         tsf_low = ch_switch->timestamp & 0x0ffffffff;
 237         /*
 238          * calculate the ucode channel switch time
 239          * adding TSF as one of the factor for when to switch
 240          */
 241         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
 242                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
 243                     beacon_interval)) {
 244                         switch_count -= (priv->ucode_beacon_time -
 245                                 tsf_low) / beacon_interval;
 246                 } else
 247                         switch_count = 0;
 248         }
 249         if (switch_count <= 1)
 250                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
 251         else {
 252                 switch_time_in_usec =
 253                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
 254                 ucode_switch_time = iwl_usecs_to_beacons(priv,
 255                                                          switch_time_in_usec,
 256                                                          beacon_interval);
 257                 cmd.switch_time = iwl_add_beacon_time(priv,
 258                                                       priv->ucode_beacon_time,
 259                                                       ucode_switch_time,
 260                                                       beacon_interval);
 261         }
 262         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
 263                       cmd.switch_time);
 264         ch_info = iwl_get_channel_info(priv, priv->band, ch);
 265         if (ch_info)
 266                 cmd.expect_beacon = is_channel_radar(ch_info);
 267         else {
 268                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
 269                         ctx->active.channel, ch);
 270                 return -EFAULT;
 271         }
 272
 273         return iwl_dvm_send_cmd(priv, &hcmd);
 274 }
 275
 276 static struct iwl_lib_ops iwl5000_lib = {
 277         .set_hw_params = iwl5000_hw_set_hw_params,
 278         .set_channel_switch = iwl5000_hw_channel_switch,
 279         .nic_config = iwl5000_nic_config,
 280         .eeprom_ops = {
 281                 .regulatory_bands = {
 282                         EEPROM_REG_BAND_1_CHANNELS,
 283                         EEPROM_REG_BAND_2_CHANNELS,
 284                         EEPROM_REG_BAND_3_CHANNELS,
 285                         EEPROM_REG_BAND_4_CHANNELS,
 286                         EEPROM_REG_BAND_5_CHANNELS,
 287                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 288                         EEPROM_REG_BAND_52_HT40_CHANNELS
 289                 },
 290         },
 291         .temperature = iwlagn_temperature,
 292 };
 293
 294 static struct iwl_lib_ops iwl5150_lib = {
 295         .set_hw_params = iwl5150_hw_set_hw_params,
 296         .set_channel_switch = iwl5000_hw_channel_switch,
 297         .nic_config = iwl5000_nic_config,
 298         .eeprom_ops = {
 299                 .regulatory_bands = {
 300                         EEPROM_REG_BAND_1_CHANNELS,
 301                         EEPROM_REG_BAND_2_CHANNELS,
 302                         EEPROM_REG_BAND_3_CHANNELS,
 303                         EEPROM_REG_BAND_4_CHANNELS,
 304                         EEPROM_REG_BAND_5_CHANNELS,
 305                         EEPROM_REG_BAND_24_HT40_CHANNELS,
 306                         EEPROM_REG_BAND_52_HT40_CHANNELS
 307                 },
 308         },
 309         .temperature = iwl5150_temperature,
 310 };
 311
 312 static const struct iwl_base_params iwl5000_base_params = {
 313         .eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
 314         .num_of_queues = IWLAGN_NUM_QUEUES,
 315         .num_of_ampdu_queues = IWLAGN_NUM_AMPDU_QUEUES,
 316         .pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
 317         .led_compensation = 51,
 318         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 319         .chain_noise_scale = 1000,
 320         .wd_timeout = IWL_LONG_WD_TIMEOUT,
 321         .max_event_log_size = 512,
 322         .no_idle_support = true,
 323         .wd_disable = true,
 324 };
 325
 326 static const struct iwl_ht_params iwl5000_ht_params = {
 327         .ht_greenfield_support = true,
 328 };
 329
 330 #define IWL_DEVICE_5000                                         \
 331         .fw_name_pre = IWL5000_FW_PRE,                          \
 332         .ucode_api_max = IWL5000_UCODE_API_MAX,                 \
 333         .ucode_api_ok = IWL5000_UCODE_API_OK,                   \
 334         .ucode_api_min = IWL5000_UCODE_API_MIN,                 \
 335         .max_inst_size = IWLAGN_RTC_INST_SIZE,                  \
 336         .max_data_size = IWLAGN_RTC_DATA_SIZE,                  \
 337         .eeprom_ver = EEPROM_5000_EEPROM_VERSION,               \
 338         .eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,       \
 339         .lib = &iwl5000_lib,                                    \
 340         .base_params = &iwl5000_base_params,                    \
 341         .led_mode = IWL_LED_BLINK
 342
 343 const struct iwl_cfg iwl5300_agn_cfg = {
 344         .name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
 345         IWL_DEVICE_5000,
 346         /* at least EEPROM 0x11A has wrong info */
 347         .valid_tx_ant = ANT_ABC,        /* .cfg overwrite */
 348         .valid_rx_ant = ANT_ABC,        /* .cfg overwrite */
 349         .ht_params = &iwl5000_ht_params,
 350 };
 351
 352 const struct iwl_cfg iwl5100_bgn_cfg = {
 353         .name = "Intel(R) WiFi Link 5100 BGN",
 354         IWL_DEVICE_5000,
 355         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 356         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 357         .ht_params = &iwl5000_ht_params,
 358 };
 359
 360 const struct iwl_cfg iwl5100_abg_cfg = {
 361         .name = "Intel(R) WiFi Link 5100 ABG",
 362         IWL_DEVICE_5000,
 363         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 364         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 365 };
 366
 367 const struct iwl_cfg iwl5100_agn_cfg = {
 368         .name = "Intel(R) WiFi Link 5100 AGN",
 369         IWL_DEVICE_5000,
 370         .valid_tx_ant = ANT_B,          /* .cfg overwrite */
 371         .valid_rx_ant = ANT_AB,         /* .cfg overwrite */
 372         .ht_params = &iwl5000_ht_params,
 373 };
 374
 375 const struct iwl_cfg iwl5350_agn_cfg = {
 376         .name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
 377         .fw_name_pre = IWL5000_FW_PRE,
 378         .ucode_api_max = IWL5000_UCODE_API_MAX,
 379         .ucode_api_ok = IWL5000_UCODE_API_OK,
 380         .ucode_api_min = IWL5000_UCODE_API_MIN,
 381         .max_inst_size = IWLAGN_RTC_INST_SIZE,
 382         .max_data_size = IWLAGN_RTC_DATA_SIZE,
 383         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,
 384         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
 385         .lib = &iwl5000_lib,
 386         .base_params = &iwl5000_base_params,
 387         .ht_params = &iwl5000_ht_params,
 388         .led_mode = IWL_LED_BLINK,
 389         .internal_wimax_coex = true,
 390 };
 391
 392 #define IWL_DEVICE_5150                                         \
 393         .fw_name_pre = IWL5150_FW_PRE,                          \
 394         .ucode_api_max = IWL5150_UCODE_API_MAX,                 \
 395         .ucode_api_ok = IWL5150_UCODE_API_OK,                   \
 396         .ucode_api_min = IWL5150_UCODE_API_MIN,                 \
 397         .max_inst_size = IWLAGN_RTC_INST_SIZE,                  \
 398         .max_data_size = IWLAGN_RTC_DATA_SIZE,                  \
 399         .eeprom_ver = EEPROM_5050_EEPROM_VERSION,               \
 400         .eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,       \
 401         .lib = &iwl5150_lib,                                    \
 402         .base_params = &iwl5000_base_params,                    \
 403         .no_xtal_calib = true,                                  \
 404         .led_mode = IWL_LED_BLINK,                              \
 405         .internal_wimax_coex = true
 406
 407 const struct iwl_cfg iwl5150_agn_cfg = {
 408         .name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
 409         IWL_DEVICE_5150,
 410         .ht_params = &iwl5000_ht_params,
 411
 412 };
 413
 414 const struct iwl_cfg iwl5150_abg_cfg = {
 415         .name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
 416         IWL_DEVICE_5150,
 417 };
 418
 419 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_OK));
 420 MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_OK));