drivers/net/wireless/iwlwifi/iwl-nvm-parse.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
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  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
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  20  * along with this program; if not, write to the Free Software
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  44  *    the documentation and/or other materials provided with the
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *****************************************************************************/
  62 #include <linux/types.h>
  63 #include <linux/slab.h>
  64 #include <linux/export.h>
  65 #include "iwl-drv.h"
  66 #include "iwl-modparams.h"
  67 #include "iwl-nvm-parse.h"
  68
  69 /* NVM offsets (in words) definitions */
  70 enum wkp_nvm_offsets {
  71         /* NVM HW-Section offset (in words) definitions */
  72         HW_ADDR = 0x15,
  73
  74 /* NVM SW-Section offset (in words) definitions */
  75         NVM_SW_SECTION = 0x1C0,
  76         NVM_VERSION = 0,
  77         RADIO_CFG = 1,
  78         SKU = 2,
  79         N_HW_ADDRS = 3,
  80         NVM_CHANNELS = 0x1E0 - NVM_SW_SECTION,
  81
  82 /* NVM calibration section offset (in words) definitions */
  83         NVM_CALIB_SECTION = 0x2B8,
  84         XTAL_CALIB = 0x316 - NVM_CALIB_SECTION
  85 };
  86
  87 /* SKU Capabilities (actual values from NVM definition) */
  88 enum nvm_sku_bits {
  89         NVM_SKU_CAP_BAND_24GHZ  = BIT(0),
  90         NVM_SKU_CAP_BAND_52GHZ  = BIT(1),
  91         NVM_SKU_CAP_11N_ENABLE  = BIT(2),
  92         NVM_SKU_CAP_11AC_ENABLE = BIT(3),
  93 };
  94
  95 /* radio config bits (actual values from NVM definition) */
  96 #define NVM_RF_CFG_DASH_MSK(x)   (x & 0x3)         /* bits 0-1   */
  97 #define NVM_RF_CFG_STEP_MSK(x)   ((x >> 2)  & 0x3) /* bits 2-3   */
  98 #define NVM_RF_CFG_TYPE_MSK(x)   ((x >> 4)  & 0x3) /* bits 4-5   */
  99 #define NVM_RF_CFG_PNUM_MSK(x)   ((x >> 6)  & 0x3) /* bits 6-7   */
 100 #define NVM_RF_CFG_TX_ANT_MSK(x) ((x >> 8)  & 0xF) /* bits 8-11  */
 101 #define NVM_RF_CFG_RX_ANT_MSK(x) ((x >> 12) & 0xF) /* bits 12-15 */
 102
 103 /*
 104  * These are the channel numbers in the order that they are stored in the NVM
 105  */
 106 static const u8 iwl_nvm_channels[] = {
 107         /* 2.4 GHz */
 108         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
 109         /* 5 GHz */
 110         36, 40, 44 , 48, 52, 56, 60, 64,
 111         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144,
 112         149, 153, 157, 161, 165
 113 };
 114
 115 #define IWL_NUM_CHANNELS        ARRAY_SIZE(iwl_nvm_channels)
 116 #define NUM_2GHZ_CHANNELS       14
 117 #define FIRST_2GHZ_HT_MINUS     5
 118 #define LAST_2GHZ_HT_PLUS       9
 119 #define LAST_5GHZ_HT            161
 120
 121 #define DEFAULT_MAX_TX_POWER 16
 122
 123 /* rate data (static) */
 124 static struct ieee80211_rate iwl_cfg80211_rates[] = {
 125         { .bitrate = 1 * 10, .hw_value = 0, .hw_value_short = 0, },
 126         { .bitrate = 2 * 10, .hw_value = 1, .hw_value_short = 1,
 127           .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
 128         { .bitrate = 5.5 * 10, .hw_value = 2, .hw_value_short = 2,
 129           .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
 130         { .bitrate = 11 * 10, .hw_value = 3, .hw_value_short = 3,
 131           .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
 132         { .bitrate = 6 * 10, .hw_value = 4, .hw_value_short = 4, },
 133         { .bitrate = 9 * 10, .hw_value = 5, .hw_value_short = 5, },
 134         { .bitrate = 12 * 10, .hw_value = 6, .hw_value_short = 6, },
 135         { .bitrate = 18 * 10, .hw_value = 7, .hw_value_short = 7, },
 136         { .bitrate = 24 * 10, .hw_value = 8, .hw_value_short = 8, },
 137         { .bitrate = 36 * 10, .hw_value = 9, .hw_value_short = 9, },
 138         { .bitrate = 48 * 10, .hw_value = 10, .hw_value_short = 10, },
 139         { .bitrate = 54 * 10, .hw_value = 11, .hw_value_short = 11, },
 140 };
 141 #define RATES_24_OFFS   0
 142 #define N_RATES_24      ARRAY_SIZE(iwl_cfg80211_rates)
 143 #define RATES_52_OFFS   4
 144 #define N_RATES_52      (N_RATES_24 - RATES_52_OFFS)
 145
 146 /**
 147  * enum iwl_nvm_channel_flags - channel flags in NVM
 148  * @NVM_CHANNEL_VALID: channel is usable for this SKU/geo
 149  * @NVM_CHANNEL_IBSS: usable as an IBSS channel
 150  * @NVM_CHANNEL_ACTIVE: active scanning allowed
 151  * @NVM_CHANNEL_RADAR: radar detection required
 152  * @NVM_CHANNEL_DFS: dynamic freq selection candidate
 153  * @NVM_CHANNEL_WIDE: 20 MHz channel okay (?)
 154  * @NVM_CHANNEL_40MHZ: 40 MHz channel okay (?)
 155  * @NVM_CHANNEL_80MHZ: 80 MHz channel okay (?)
 156  * @NVM_CHANNEL_160MHZ: 160 MHz channel okay (?)
 157  */
 158 enum iwl_nvm_channel_flags {
 159         NVM_CHANNEL_VALID = BIT(0),
 160         NVM_CHANNEL_IBSS = BIT(1),
 161         NVM_CHANNEL_ACTIVE = BIT(3),
 162         NVM_CHANNEL_RADAR = BIT(4),
 163         NVM_CHANNEL_DFS = BIT(7),
 164         NVM_CHANNEL_WIDE = BIT(8),
 165         NVM_CHANNEL_40MHZ = BIT(9),
 166         NVM_CHANNEL_80MHZ = BIT(10),
 167         NVM_CHANNEL_160MHZ = BIT(11),
 168 };
 169
 170 #define CHECK_AND_PRINT_I(x)    \
 171         ((ch_flags & NVM_CHANNEL_##x) ? # x " " : "")
 172
 173 static int iwl_init_channel_map(struct device *dev, const struct iwl_cfg *cfg,
 174                                 struct iwl_nvm_data *data,
 175                                 const __le16 * const nvm_ch_flags)
 176 {
 177         int ch_idx;
 178         int n_channels = 0;
 179         struct ieee80211_channel *channel;
 180         u16 ch_flags;
 181         bool is_5ghz;
 182
 183         for (ch_idx = 0; ch_idx < IWL_NUM_CHANNELS; ch_idx++) {
 184                 ch_flags = __le16_to_cpup(nvm_ch_flags + ch_idx);
 185                 if (!(ch_flags & NVM_CHANNEL_VALID)) {
 186                         IWL_DEBUG_EEPROM(dev,
 187                                          "Ch. %d Flags %x [%sGHz] - No traffic\n",
 188                                          iwl_nvm_channels[ch_idx],
 189                                          ch_flags,
 190                                          (ch_idx >= NUM_2GHZ_CHANNELS) ?
 191                                          "5.2" : "2.4");
 192                         continue;
 193                 }
 194
 195                 channel = &data->channels[n_channels];
 196                 n_channels++;
 197
 198                 channel->hw_value = iwl_nvm_channels[ch_idx];
 199                 channel->band = (ch_idx < NUM_2GHZ_CHANNELS) ?
 200                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 201                 channel->center_freq =
 202                         ieee80211_channel_to_frequency(
 203                                 channel->hw_value, channel->band);
 204
 205                 /* TODO: Need to be dependent to the NVM */
 206                 channel->flags = IEEE80211_CHAN_NO_HT40;
 207                 if (ch_idx < NUM_2GHZ_CHANNELS &&
 208                     (ch_flags & NVM_CHANNEL_40MHZ)) {
 209                         if (iwl_nvm_channels[ch_idx] <= LAST_2GHZ_HT_PLUS)
 210                                 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
 211                         if (iwl_nvm_channels[ch_idx] >= FIRST_2GHZ_HT_MINUS)
 212                                 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
 213                 } else if (iwl_nvm_channels[ch_idx] <= LAST_5GHZ_HT &&
 214                            (ch_flags & NVM_CHANNEL_40MHZ)) {
 215                         if ((ch_idx - NUM_2GHZ_CHANNELS) % 2 == 0)
 216                                 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
 217                         else
 218                                 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
 219                 }
 220                 if (!(ch_flags & NVM_CHANNEL_80MHZ))
 221                         channel->flags |= IEEE80211_CHAN_NO_80MHZ;
 222                 if (!(ch_flags & NVM_CHANNEL_160MHZ))
 223                         channel->flags |= IEEE80211_CHAN_NO_160MHZ;
 224
 225                 if (!(ch_flags & NVM_CHANNEL_IBSS))
 226                         channel->flags |= IEEE80211_CHAN_NO_IR;
 227
 228                 if (!(ch_flags & NVM_CHANNEL_ACTIVE))
 229                         channel->flags |= IEEE80211_CHAN_NO_IR;
 230
 231                 if (ch_flags & NVM_CHANNEL_RADAR)
 232                         channel->flags |= IEEE80211_CHAN_RADAR;
 233
 234                 /* Initialize regulatory-based run-time data */
 235
 236                 /*
 237                  * Default value - highest tx power value.  max_power
 238                  * is not used in mvm, and is used for backwards compatibility
 239                  */
 240                 channel->max_power = DEFAULT_MAX_TX_POWER;
 241                 is_5ghz = channel->band == IEEE80211_BAND_5GHZ;
 242                 IWL_DEBUG_EEPROM(dev,
 243                                  "Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm): Ad-Hoc %ssupported\n",
 244                                  channel->hw_value,
 245                                  is_5ghz ? "5.2" : "2.4",
 246                                  CHECK_AND_PRINT_I(VALID),
 247                                  CHECK_AND_PRINT_I(IBSS),
 248                                  CHECK_AND_PRINT_I(ACTIVE),
 249                                  CHECK_AND_PRINT_I(RADAR),
 250                                  CHECK_AND_PRINT_I(WIDE),
 251                                  CHECK_AND_PRINT_I(DFS),
 252                                  ch_flags,
 253                                  channel->max_power,
 254                                  ((ch_flags & NVM_CHANNEL_IBSS) &&
 255                                   !(ch_flags & NVM_CHANNEL_RADAR))
 256                                         ? "" : "not ");
 257         }
 258
 259         return n_channels;
 260 }
 261
 262 static void iwl_init_vht_hw_capab(const struct iwl_cfg *cfg,
 263                                   struct iwl_nvm_data *data,
 264                                   struct ieee80211_sta_vht_cap *vht_cap)
 265 {
 266         int num_ants = num_of_ant(data->valid_rx_ant);
 267
 268         vht_cap->vht_supported = true;
 269
 270         vht_cap->cap = IEEE80211_VHT_CAP_SHORT_GI_80 |
 271                        IEEE80211_VHT_CAP_RXSTBC_1 |
 272                        IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 273                        3 << IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT |
 274                        7 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 275
 276         if (num_ants > 1)
 277                 vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC;
 278
 279         if (iwlwifi_mod_params.amsdu_size_8K)
 280                 vht_cap->cap |= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991;
 281
 282         vht_cap->vht_mcs.rx_mcs_map =
 283                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
 284                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
 285                             IEEE80211_VHT_MCS_NOT_SUPPORTED << 4 |
 286                             IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
 287                             IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
 288                             IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
 289                             IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
 290                             IEEE80211_VHT_MCS_NOT_SUPPORTED << 14);
 291
 292         if (num_ants == 1 ||
 293             cfg->rx_with_siso_diversity) {
 294                 vht_cap->cap |= IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 295                                 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
 296                 /* this works because NOT_SUPPORTED == 3 */
 297                 vht_cap->vht_mcs.rx_mcs_map |=
 298                         cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << 2);
 299         }
 300
 301         vht_cap->vht_mcs.tx_mcs_map = vht_cap->vht_mcs.rx_mcs_map;
 302 }
 303
 304 static void iwl_init_sbands(struct device *dev, const struct iwl_cfg *cfg,
 305                             struct iwl_nvm_data *data, const __le16 *nvm_sw,
 306                             bool enable_vht, u8 tx_chains, u8 rx_chains)
 307 {
 308         int n_channels = iwl_init_channel_map(dev, cfg, data,
 309                         &nvm_sw[NVM_CHANNELS]);
 310         int n_used = 0;
 311         struct ieee80211_supported_band *sband;
 312
 313         sband = &data->bands[IEEE80211_BAND_2GHZ];
 314         sband->band = IEEE80211_BAND_2GHZ;
 315         sband->bitrates = &iwl_cfg80211_rates[RATES_24_OFFS];
 316         sband->n_bitrates = N_RATES_24;
 317         n_used += iwl_init_sband_channels(data, sband, n_channels,
 318                                           IEEE80211_BAND_2GHZ);
 319         iwl_init_ht_hw_capab(cfg, data, &sband->ht_cap, IEEE80211_BAND_2GHZ,
 320                              tx_chains, rx_chains);
 321
 322         sband = &data->bands[IEEE80211_BAND_5GHZ];
 323         sband->band = IEEE80211_BAND_5GHZ;
 324         sband->bitrates = &iwl_cfg80211_rates[RATES_52_OFFS];
 325         sband->n_bitrates = N_RATES_52;
 326         n_used += iwl_init_sband_channels(data, sband, n_channels,
 327                                           IEEE80211_BAND_5GHZ);
 328         iwl_init_ht_hw_capab(cfg, data, &sband->ht_cap, IEEE80211_BAND_5GHZ,
 329                              tx_chains, rx_chains);
 330         if (enable_vht)
 331                 iwl_init_vht_hw_capab(cfg, data, &sband->vht_cap);
 332
 333         if (n_channels != n_used)
 334                 IWL_ERR_DEV(dev, "NVM: used only %d of %d channels\n",
 335                             n_used, n_channels);
 336 }
 337
 338 struct iwl_nvm_data *
 339 iwl_parse_nvm_data(struct device *dev, const struct iwl_cfg *cfg,
 340                    const __le16 *nvm_hw, const __le16 *nvm_sw,
 341                    const __le16 *nvm_calib, u8 tx_chains, u8 rx_chains)
 342 {
 343         struct iwl_nvm_data *data;
 344         u8 hw_addr[ETH_ALEN];
 345         u16 radio_cfg, sku;
 346
 347         data = kzalloc(sizeof(*data) +
 348                        sizeof(struct ieee80211_channel) * IWL_NUM_CHANNELS,
 349                        GFP_KERNEL);
 350         if (!data)
 351                 return NULL;
 352
 353         data->nvm_version = le16_to_cpup(nvm_sw + NVM_VERSION);
 354
 355         radio_cfg = le16_to_cpup(nvm_sw + RADIO_CFG);
 356         data->radio_cfg_type = NVM_RF_CFG_TYPE_MSK(radio_cfg);
 357         data->radio_cfg_step = NVM_RF_CFG_STEP_MSK(radio_cfg);
 358         data->radio_cfg_dash = NVM_RF_CFG_DASH_MSK(radio_cfg);
 359         data->radio_cfg_pnum = NVM_RF_CFG_PNUM_MSK(radio_cfg);
 360         data->valid_tx_ant = NVM_RF_CFG_TX_ANT_MSK(radio_cfg);
 361         data->valid_rx_ant = NVM_RF_CFG_RX_ANT_MSK(radio_cfg);
 362
 363         sku = le16_to_cpup(nvm_sw + SKU);
 364         data->sku_cap_band_24GHz_enable = sku & NVM_SKU_CAP_BAND_24GHZ;
 365         data->sku_cap_band_52GHz_enable = sku & NVM_SKU_CAP_BAND_52GHZ;
 366         data->sku_cap_11n_enable = sku & NVM_SKU_CAP_11N_ENABLE;
 367         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
 368                 data->sku_cap_11n_enable = false;
 369
 370         /* check overrides (some devices have wrong NVM) */
 371         if (cfg->valid_tx_ant)
 372                 data->valid_tx_ant = cfg->valid_tx_ant;
 373         if (cfg->valid_rx_ant)
 374                 data->valid_rx_ant = cfg->valid_rx_ant;
 375
 376         if (!data->valid_tx_ant || !data->valid_rx_ant) {
 377                 IWL_ERR_DEV(dev, "invalid antennas (0x%x, 0x%x)\n",
 378                             data->valid_tx_ant, data->valid_rx_ant);
 379                 kfree(data);
 380                 return NULL;
 381         }
 382
 383         data->n_hw_addrs = le16_to_cpup(nvm_sw + N_HW_ADDRS);
 384
 385         data->xtal_calib[0] = *(nvm_calib + XTAL_CALIB);
 386         data->xtal_calib[1] = *(nvm_calib + XTAL_CALIB + 1);
 387
 388         /* The byte order is little endian 16 bit, meaning 214365 */
 389         memcpy(hw_addr, nvm_hw + HW_ADDR, ETH_ALEN);
 390         data->hw_addr[0] = hw_addr[1];
 391         data->hw_addr[1] = hw_addr[0];
 392         data->hw_addr[2] = hw_addr[3];
 393         data->hw_addr[3] = hw_addr[2];
 394         data->hw_addr[4] = hw_addr[5];
 395         data->hw_addr[5] = hw_addr[4];
 396
 397         iwl_init_sbands(dev, cfg, data, nvm_sw, sku & NVM_SKU_CAP_11AC_ENABLE,
 398                         tx_chains, rx_chains);
 399
 400         data->calib_version = 255;
 401
 402         return data;
 403 }
 404 IWL_EXPORT_SYMBOL(iwl_parse_nvm_data);