drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c

   1 // SPDX-License-Identifier: ISC
   2 /* Copyright (C) 2020 MediaTek Inc. */
   3
   4 #include <linux/firmware.h>
   5 #include "mt7915.h"
   6 #include "eeprom.h"
   7
   8 static int mt7915_eeprom_load_precal(struct mt7915_dev *dev)
   9 {
  10         struct mt76_dev *mdev = &dev->mt76;
  11         u8 *eeprom = mdev->eeprom.data;
  12         u32 offs = is_mt7915(&dev->mt76) ? MT_EE_DO_PRE_CAL : MT_EE_DO_PRE_CAL_V2;
  13         u32 size, val = eeprom[offs];
  14         int ret;
  15
  16         if (!dev->flash_mode || !val)
  17                 return 0;
  18
  19         size = mt7915_get_cal_group_size(dev) + mt7915_get_cal_dpd_size(dev);
  20
  21         dev->cal = devm_kzalloc(mdev->dev, size, GFP_KERNEL);
  22         if (!dev->cal)
  23                 return -ENOMEM;
  24
  25         offs = is_mt7915(&dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
  26
  27         ret = mt76_get_of_data_from_mtd(mdev, dev->cal, offs, size);
  28         if (!ret)
  29                 return ret;
  30
  31         ret = mt76_get_of_data_from_nvmem(mdev, dev->cal, "precal", size);
  32         if (!ret)
  33                 return ret;
  34
  35         dev_warn(mdev->dev, "missing precal data, size=%d\n", size);
  36         devm_kfree(mdev->dev, dev->cal);
  37         dev->cal = NULL;
  38
  39         return ret;
  40 }
  41
  42 static int mt7915_check_eeprom(struct mt7915_dev *dev)
  43 {
  44         u8 *eeprom = dev->mt76.eeprom.data;
  45         u16 val = get_unaligned_le16(eeprom);
  46
  47 #define CHECK_EEPROM_ERR(match) (match ? 0 : -EINVAL)
  48         switch (val) {
  49         case 0x7915:
  50                 return CHECK_EEPROM_ERR(is_mt7915(&dev->mt76));
  51         case 0x7916:
  52                 return CHECK_EEPROM_ERR(is_mt7916(&dev->mt76));
  53         case 0x7981:
  54                 return CHECK_EEPROM_ERR(is_mt7981(&dev->mt76));
  55         case 0x7986:
  56                 return CHECK_EEPROM_ERR(is_mt7986(&dev->mt76));
  57         default:
  58                 return -EINVAL;
  59         }
  60 }
  61
  62 static char *mt7915_eeprom_name(struct mt7915_dev *dev)
  63 {
  64         switch (mt76_chip(&dev->mt76)) {
  65         case 0x7915:
  66                 return dev->dbdc_support ?
  67                        MT7915_EEPROM_DEFAULT_DBDC : MT7915_EEPROM_DEFAULT;
  68         case 0x7981:
  69                 /* mt7981 only supports mt7976 and only in DBDC mode */
  70                 return MT7981_EEPROM_MT7976_DEFAULT_DBDC;
  71         case 0x7986:
  72                 switch (mt7915_check_adie(dev, true)) {
  73                 case MT7976_ONE_ADIE_DBDC:
  74                         return MT7986_EEPROM_MT7976_DEFAULT_DBDC;
  75                 case MT7975_ONE_ADIE:
  76                         return MT7986_EEPROM_MT7975_DEFAULT;
  77                 case MT7976_ONE_ADIE:
  78                         return MT7986_EEPROM_MT7976_DEFAULT;
  79                 case MT7975_DUAL_ADIE:
  80                         return MT7986_EEPROM_MT7975_DUAL_DEFAULT;
  81                 case MT7976_DUAL_ADIE:
  82                         return MT7986_EEPROM_MT7976_DUAL_DEFAULT;
  83                 default:
  84                         break;
  85                 }
  86                 return NULL;
  87         default:
  88                 return MT7916_EEPROM_DEFAULT;
  89         }
  90 }
  91
  92 static int
  93 mt7915_eeprom_load_default(struct mt7915_dev *dev)
  94 {
  95         u8 *eeprom = dev->mt76.eeprom.data;
  96         const struct firmware *fw = NULL;
  97         int ret;
  98
  99         ret = request_firmware(&fw, mt7915_eeprom_name(dev), dev->mt76.dev);
 100         if (ret)
 101                 return ret;
 102
 103         if (!fw || !fw->data) {
 104                 dev_err(dev->mt76.dev, "Invalid default bin\n");
 105                 ret = -EINVAL;
 106                 goto out;
 107         }
 108
 109         memcpy(eeprom, fw->data, mt7915_eeprom_size(dev));
 110         dev->flash_mode = true;
 111
 112 out:
 113         release_firmware(fw);
 114
 115         return ret;
 116 }
 117
 118 static int mt7915_eeprom_load(struct mt7915_dev *dev)
 119 {
 120         int ret;
 121         u16 eeprom_size = mt7915_eeprom_size(dev);
 122
 123         ret = mt76_eeprom_init(&dev->mt76, eeprom_size);
 124         if (ret < 0)
 125                 return ret;
 126
 127         if (ret) {
 128                 dev->flash_mode = true;
 129         } else {
 130                 u8 free_block_num;
 131                 u32 block_num, i;
 132                 u32 eeprom_blk_size = MT7915_EEPROM_BLOCK_SIZE;
 133
 134                 ret = mt7915_mcu_get_eeprom_free_block(dev, &free_block_num);
 135                 if (ret < 0)
 136                         return ret;
 137
 138                 /* efuse info isn't enough */
 139                 if (free_block_num >= 29)
 140                         return -EINVAL;
 141
 142                 /* read eeprom data from efuse */
 143                 block_num = DIV_ROUND_UP(eeprom_size, eeprom_blk_size);
 144                 for (i = 0; i < block_num; i++) {
 145                         ret = mt7915_mcu_get_eeprom(dev, i * eeprom_blk_size);
 146                         if (ret < 0)
 147                                 return ret;
 148                 }
 149         }
 150
 151         return mt7915_check_eeprom(dev);
 152 }
 153
 154 static void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy)
 155 {
 156         struct mt7915_dev *dev = phy->dev;
 157         u8 *eeprom = dev->mt76.eeprom.data;
 158         u8 band = phy->mt76->band_idx;
 159         u32 val;
 160
 161         val = eeprom[MT_EE_WIFI_CONF + band];
 162         val = FIELD_GET(MT_EE_WIFI_CONF0_BAND_SEL, val);
 163
 164         if (!is_mt7915(&dev->mt76)) {
 165                 switch (val) {
 166                 case MT_EE_V2_BAND_SEL_5GHZ:
 167                         phy->mt76->cap.has_5ghz = true;
 168                         return;
 169                 case MT_EE_V2_BAND_SEL_6GHZ:
 170                         phy->mt76->cap.has_6ghz = true;
 171                         return;
 172                 case MT_EE_V2_BAND_SEL_5GHZ_6GHZ:
 173                         phy->mt76->cap.has_5ghz = true;
 174                         phy->mt76->cap.has_6ghz = true;
 175                         return;
 176                 default:
 177                         phy->mt76->cap.has_2ghz = true;
 178                         return;
 179                 }
 180         } else if (val == MT_EE_BAND_SEL_DEFAULT && dev->dbdc_support) {
 181                 val = band ? MT_EE_BAND_SEL_5GHZ : MT_EE_BAND_SEL_2GHZ;
 182         }
 183
 184         switch (val) {
 185         case MT_EE_BAND_SEL_5GHZ:
 186                 phy->mt76->cap.has_5ghz = true;
 187                 break;
 188         case MT_EE_BAND_SEL_2GHZ:
 189                 phy->mt76->cap.has_2ghz = true;
 190                 break;
 191         default:
 192                 phy->mt76->cap.has_2ghz = true;
 193                 phy->mt76->cap.has_5ghz = true;
 194                 break;
 195         }
 196 }
 197
 198 void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev,
 199                                 struct mt7915_phy *phy)
 200 {
 201         u8 path, nss, nss_max = 4, *eeprom = dev->mt76.eeprom.data;
 202         struct mt76_phy *mphy = phy->mt76;
 203         u8 band = phy->mt76->band_idx;
 204
 205         mt7915_eeprom_parse_band_config(phy);
 206
 207         /* read tx/rx path from eeprom */
 208         if (is_mt7915(&dev->mt76)) {
 209                 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
 210                                  eeprom[MT_EE_WIFI_CONF]);
 211         } else {
 212                 path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH,
 213                                  eeprom[MT_EE_WIFI_CONF + band]);
 214         }
 215
 216         if (!path || path > 4)
 217                 path = 4;
 218
 219         /* read tx/rx stream */
 220         nss = path;
 221         if (dev->dbdc_support) {
 222                 if (is_mt7915(&dev->mt76)) {
 223                         path = min_t(u8, path, 2);
 224                         nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B0,
 225                                         eeprom[MT_EE_WIFI_CONF + 3]);
 226                         if (band)
 227                                 nss = FIELD_GET(MT_EE_WIFI_CONF3_TX_PATH_B1,
 228                                                 eeprom[MT_EE_WIFI_CONF + 3]);
 229                 } else {
 230                         nss = FIELD_GET(MT_EE_WIFI_CONF_STREAM_NUM,
 231                                         eeprom[MT_EE_WIFI_CONF + 2 + band]);
 232                 }
 233
 234                 if (!is_mt798x(&dev->mt76))
 235                         nss_max = 2;
 236         }
 237
 238         if (!nss)
 239                 nss = nss_max;
 240         nss = min_t(u8, min_t(u8, nss_max, nss), path);
 241
 242         mphy->chainmask = BIT(path) - 1;
 243         if (band)
 244                 mphy->chainmask <<= dev->chainshift;
 245         mphy->antenna_mask = BIT(nss) - 1;
 246         dev->chainmask |= mphy->chainmask;
 247         dev->chainshift = hweight8(dev->mphy.chainmask);
 248 }
 249
 250 int mt7915_eeprom_init(struct mt7915_dev *dev)
 251 {
 252         int ret;
 253
 254         ret = mt7915_eeprom_load(dev);
 255         if (ret < 0) {
 256                 if (ret != -EINVAL)
 257                         return ret;
 258
 259                 dev_warn(dev->mt76.dev, "eeprom load fail, use default bin\n");
 260                 ret = mt7915_eeprom_load_default(dev);
 261                 if (ret)
 262                         return ret;
 263         }
 264
 265         mt7915_eeprom_load_precal(dev);
 266         mt7915_eeprom_parse_hw_cap(dev, &dev->phy);
 267         memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
 268                ETH_ALEN);
 269
 270         mt76_eeprom_override(&dev->mphy);
 271
 272         return 0;
 273 }
 274
 275 int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
 276                                    struct ieee80211_channel *chan,
 277                                    u8 chain_idx)
 278 {
 279         u8 *eeprom = dev->mt76.eeprom.data;
 280         int index, target_power;
 281         bool tssi_on, is_7976;
 282
 283         if (chain_idx > 3)
 284                 return -EINVAL;
 285
 286         tssi_on = mt7915_tssi_enabled(dev, chan->band);
 287         is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
 288
 289         if (chan->band == NL80211_BAND_2GHZ) {
 290                 if (is_7976) {
 291                         index = MT_EE_TX0_POWER_2G_V2 + chain_idx;
 292                         target_power = eeprom[index];
 293                 } else {
 294                         index = MT_EE_TX0_POWER_2G + chain_idx * 3;
 295                         target_power = eeprom[index];
 296
 297                         if (!tssi_on)
 298                                 target_power += eeprom[index + 1];
 299                 }
 300         } else if (chan->band == NL80211_BAND_5GHZ) {
 301                 int group = mt7915_get_channel_group_5g(chan->hw_value, is_7976);
 302
 303                 if (is_7976) {
 304                         index = MT_EE_TX0_POWER_5G_V2 + chain_idx * 5;
 305                         target_power = eeprom[index + group];
 306                 } else {
 307                         index = MT_EE_TX0_POWER_5G + chain_idx * 12;
 308                         target_power = eeprom[index + group];
 309
 310                         if (!tssi_on)
 311                                 target_power += eeprom[index + 8];
 312                 }
 313         } else {
 314                 int group = mt7915_get_channel_group_6g(chan->hw_value);
 315
 316                 index = MT_EE_TX0_POWER_6G_V2 + chain_idx * 8;
 317                 target_power = is_7976 ? eeprom[index + group] : 0;
 318         }
 319
 320         return target_power;
 321 }
 322
 323 s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
 324 {
 325         u8 *eeprom = dev->mt76.eeprom.data;
 326         u32 val, offs;
 327         s8 delta;
 328         bool is_7976 = mt7915_check_adie(dev, false) || is_mt7916(&dev->mt76);
 329
 330         if (band == NL80211_BAND_2GHZ)
 331                 offs = is_7976 ? MT_EE_RATE_DELTA_2G_V2 : MT_EE_RATE_DELTA_2G;
 332         else if (band == NL80211_BAND_5GHZ)
 333                 offs = is_7976 ? MT_EE_RATE_DELTA_5G_V2 : MT_EE_RATE_DELTA_5G;
 334         else
 335                 offs = is_7976 ? MT_EE_RATE_DELTA_6G_V2 : 0;
 336
 337         val = eeprom[offs];
 338
 339         if (!offs || !(val & MT_EE_RATE_DELTA_EN))
 340                 return 0;
 341
 342         delta = FIELD_GET(MT_EE_RATE_DELTA_MASK, val);
 343
 344         return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
 345 }
 346
 347 const u8 mt7915_sku_group_len[] = {
 348         [SKU_CCK] = 4,
 349         [SKU_OFDM] = 8,
 350         [SKU_HT_BW20] = 8,
 351         [SKU_HT_BW40] = 9,
 352         [SKU_VHT_BW20] = 12,
 353         [SKU_VHT_BW40] = 12,
 354         [SKU_VHT_BW80] = 12,
 355         [SKU_VHT_BW160] = 12,
 356         [SKU_HE_RU26] = 12,
 357         [SKU_HE_RU52] = 12,
 358         [SKU_HE_RU106] = 12,
 359         [SKU_HE_RU242] = 12,
 360         [SKU_HE_RU484] = 12,
 361         [SKU_HE_RU996] = 12,
 362         [SKU_HE_RU2x996] = 12
 363 };