1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> 4 */ 5 6 #include <linux/module.h> 7 #include <linux/of.h> 8 #include <asm/unaligned.h> 9 #include "mt76x2.h" 10 #include "eeprom.h" 11 12 #define EE_FIELD(_name, _value) [MT_EE_##_name] = (_value) | 1 13 14 static int 15 mt76x2_eeprom_get_macaddr(struct mt76x02_dev *dev) 16 { 17 void *src = dev->mt76.eeprom.data + MT_EE_MAC_ADDR; 18 19 memcpy(dev->mphy.macaddr, src, ETH_ALEN); 20 return 0; 21 } 22 23 static bool 24 mt76x2_has_cal_free_data(struct mt76x02_dev *dev, u8 *efuse) 25 { 26 u16 *efuse_w = (u16 *)efuse; 27 28 if (efuse_w[MT_EE_NIC_CONF_0] != 0) 29 return false; 30 31 if (efuse_w[MT_EE_XTAL_TRIM_1] == 0xffff) 32 return false; 33 34 if (efuse_w[MT_EE_TX_POWER_DELTA_BW40] != 0) 35 return false; 36 37 if (efuse_w[MT_EE_TX_POWER_0_START_2G] == 0xffff) 38 return false; 39 40 if (efuse_w[MT_EE_TX_POWER_0_GRP3_TX_POWER_DELTA] != 0) 41 return false; 42 43 if (efuse_w[MT_EE_TX_POWER_0_GRP4_TSSI_SLOPE] == 0xffff) 44 return false; 45 46 return true; 47 } 48 49 static void 50 mt76x2_apply_cal_free_data(struct mt76x02_dev *dev, u8 *efuse) 51 { 52 #define GROUP_5G(_id) \ 53 MT_EE_TX_POWER_0_START_5G + MT_TX_POWER_GROUP_SIZE_5G * (_id), \ 54 MT_EE_TX_POWER_0_START_5G + MT_TX_POWER_GROUP_SIZE_5G * (_id) + 1, \ 55 MT_EE_TX_POWER_1_START_5G + MT_TX_POWER_GROUP_SIZE_5G * (_id), \ 56 MT_EE_TX_POWER_1_START_5G + MT_TX_POWER_GROUP_SIZE_5G * (_id) + 1 57 58 static const u8 cal_free_bytes[] = { 59 MT_EE_XTAL_TRIM_1, 60 MT_EE_TX_POWER_EXT_PA_5G + 1, 61 MT_EE_TX_POWER_0_START_2G, 62 MT_EE_TX_POWER_0_START_2G + 1, 63 MT_EE_TX_POWER_1_START_2G, 64 MT_EE_TX_POWER_1_START_2G + 1, 65 GROUP_5G(0), 66 GROUP_5G(1), 67 GROUP_5G(2), 68 GROUP_5G(3), 69 GROUP_5G(4), 70 GROUP_5G(5), 71 MT_EE_RF_2G_TSSI_OFF_TXPOWER, 72 MT_EE_RF_2G_RX_HIGH_GAIN + 1, 73 MT_EE_RF_5G_GRP0_1_RX_HIGH_GAIN, 74 MT_EE_RF_5G_GRP0_1_RX_HIGH_GAIN + 1, 75 MT_EE_RF_5G_GRP2_3_RX_HIGH_GAIN, 76 MT_EE_RF_5G_GRP2_3_RX_HIGH_GAIN + 1, 77 MT_EE_RF_5G_GRP4_5_RX_HIGH_GAIN, 78 MT_EE_RF_5G_GRP4_5_RX_HIGH_GAIN + 1, 79 }; 80 struct device_node *np = dev->mt76.dev->of_node; 81 u8 *eeprom = dev->mt76.eeprom.data; 82 u8 prev_grp0[4] = { 83 eeprom[MT_EE_TX_POWER_0_START_5G], 84 eeprom[MT_EE_TX_POWER_0_START_5G + 1], 85 eeprom[MT_EE_TX_POWER_1_START_5G], 86 eeprom[MT_EE_TX_POWER_1_START_5G + 1] 87 }; 88 u16 val; 89 int i; 90 91 if (!np || !of_property_read_bool(np, "mediatek,eeprom-merge-otp")) 92 return; 93 94 if (!mt76x2_has_cal_free_data(dev, efuse)) 95 return; 96 97 for (i = 0; i < ARRAY_SIZE(cal_free_bytes); i++) { 98 int offset = cal_free_bytes[i]; 99 100 eeprom[offset] = efuse[offset]; 101 } 102 103 if (!(efuse[MT_EE_TX_POWER_0_START_5G] | 104 efuse[MT_EE_TX_POWER_0_START_5G + 1])) 105 memcpy(eeprom + MT_EE_TX_POWER_0_START_5G, prev_grp0, 2); 106 if (!(efuse[MT_EE_TX_POWER_1_START_5G] | 107 efuse[MT_EE_TX_POWER_1_START_5G + 1])) 108 memcpy(eeprom + MT_EE_TX_POWER_1_START_5G, prev_grp0 + 2, 2); 109 110 val = get_unaligned_le16(efuse + MT_EE_BT_RCAL_RESULT); 111 if (val != 0xffff) 112 eeprom[MT_EE_BT_RCAL_RESULT] = val & 0xff; 113 114 val = get_unaligned_le16(efuse + MT_EE_BT_VCDL_CALIBRATION); 115 if (val != 0xffff) 116 eeprom[MT_EE_BT_VCDL_CALIBRATION + 1] = val >> 8; 117 118 val = get_unaligned_le16(efuse + MT_EE_BT_PMUCFG); 119 if (val != 0xffff) 120 eeprom[MT_EE_BT_PMUCFG] = val & 0xff; 121 } 122 123 static int mt76x2_check_eeprom(struct mt76x02_dev *dev) 124 { 125 u16 val = get_unaligned_le16(dev->mt76.eeprom.data); 126 127 if (!val) 128 val = get_unaligned_le16(dev->mt76.eeprom.data + MT_EE_PCI_ID); 129 130 switch (val) { 131 case 0x7662: 132 case 0x7612: 133 return 0; 134 default: 135 dev_err(dev->mt76.dev, "EEPROM data check failed: %04x\n", val); 136 return -EINVAL; 137 } 138 } 139 140 static int 141 mt76x2_eeprom_load(struct mt76x02_dev *dev) 142 { 143 void *efuse; 144 bool found; 145 int ret; 146 147 ret = mt76_eeprom_init(&dev->mt76, MT7662_EEPROM_SIZE); 148 if (ret < 0) 149 return ret; 150 151 found = ret; 152 if (found) 153 found = !mt76x2_check_eeprom(dev); 154 155 dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, MT7662_EEPROM_SIZE, 156 GFP_KERNEL); 157 dev->mt76.otp.size = MT7662_EEPROM_SIZE; 158 if (!dev->mt76.otp.data) 159 return -ENOMEM; 160 161 efuse = dev->mt76.otp.data; 162 163 if (mt76x02_get_efuse_data(dev, 0, efuse, MT7662_EEPROM_SIZE, 164 MT_EE_READ)) 165 goto out; 166 167 if (found) { 168 mt76x2_apply_cal_free_data(dev, efuse); 169 } else { 170 /* FIXME: check if efuse data is complete */ 171 found = true; 172 memcpy(dev->mt76.eeprom.data, efuse, MT7662_EEPROM_SIZE); 173 } 174 175 out: 176 if (!found) 177 return -ENOENT; 178 179 return 0; 180 } 181 182 static void 183 mt76x2_set_rx_gain_group(struct mt76x02_dev *dev, u8 val) 184 { 185 s8 *dest = dev->cal.rx.high_gain; 186 187 if (!mt76x02_field_valid(val)) { 188 dest[0] = 0; 189 dest[1] = 0; 190 return; 191 } 192 193 dest[0] = mt76x02_sign_extend(val, 4); 194 dest[1] = mt76x02_sign_extend(val >> 4, 4); 195 } 196 197 static void 198 mt76x2_set_rssi_offset(struct mt76x02_dev *dev, int chain, u8 val) 199 { 200 s8 *dest = dev->cal.rx.rssi_offset; 201 202 if (!mt76x02_field_valid(val)) { 203 dest[chain] = 0; 204 return; 205 } 206 207 dest[chain] = mt76x02_sign_extend_optional(val, 7); 208 } 209 210 static enum mt76x2_cal_channel_group 211 mt76x2_get_cal_channel_group(int channel) 212 { 213 if (channel >= 184 && channel <= 196) 214 return MT_CH_5G_JAPAN; 215 if (channel <= 48) 216 return MT_CH_5G_UNII_1; 217 if (channel <= 64) 218 return MT_CH_5G_UNII_2; 219 if (channel <= 114) 220 return MT_CH_5G_UNII_2E_1; 221 if (channel <= 144) 222 return MT_CH_5G_UNII_2E_2; 223 return MT_CH_5G_UNII_3; 224 } 225 226 static u8 227 mt76x2_get_5g_rx_gain(struct mt76x02_dev *dev, u8 channel) 228 { 229 enum mt76x2_cal_channel_group group; 230 231 group = mt76x2_get_cal_channel_group(channel); 232 switch (group) { 233 case MT_CH_5G_JAPAN: 234 return mt76x02_eeprom_get(dev, 235 MT_EE_RF_5G_GRP0_1_RX_HIGH_GAIN); 236 case MT_CH_5G_UNII_1: 237 return mt76x02_eeprom_get(dev, 238 MT_EE_RF_5G_GRP0_1_RX_HIGH_GAIN) >> 8; 239 case MT_CH_5G_UNII_2: 240 return mt76x02_eeprom_get(dev, 241 MT_EE_RF_5G_GRP2_3_RX_HIGH_GAIN); 242 case MT_CH_5G_UNII_2E_1: 243 return mt76x02_eeprom_get(dev, 244 MT_EE_RF_5G_GRP2_3_RX_HIGH_GAIN) >> 8; 245 case MT_CH_5G_UNII_2E_2: 246 return mt76x02_eeprom_get(dev, 247 MT_EE_RF_5G_GRP4_5_RX_HIGH_GAIN); 248 default: 249 return mt76x02_eeprom_get(dev, 250 MT_EE_RF_5G_GRP4_5_RX_HIGH_GAIN) >> 8; 251 } 252 } 253 254 void mt76x2_read_rx_gain(struct mt76x02_dev *dev) 255 { 256 struct ieee80211_channel *chan = dev->mphy.chandef.chan; 257 int channel = chan->hw_value; 258 s8 lna_5g[3], lna_2g; 259 bool use_lna; 260 u8 lna = 0; 261 u16 val; 262 263 if (chan->band == NL80211_BAND_2GHZ) 264 val = mt76x02_eeprom_get(dev, MT_EE_RF_2G_RX_HIGH_GAIN) >> 8; 265 else 266 val = mt76x2_get_5g_rx_gain(dev, channel); 267 268 mt76x2_set_rx_gain_group(dev, val); 269 270 mt76x02_get_rx_gain(dev, chan->band, &val, &lna_2g, lna_5g); 271 mt76x2_set_rssi_offset(dev, 0, val); 272 mt76x2_set_rssi_offset(dev, 1, val >> 8); 273 274 dev->cal.rx.mcu_gain = (lna_2g & 0xff); 275 dev->cal.rx.mcu_gain |= (lna_5g[0] & 0xff) << 8; 276 dev->cal.rx.mcu_gain |= (lna_5g[1] & 0xff) << 16; 277 dev->cal.rx.mcu_gain |= (lna_5g[2] & 0xff) << 24; 278 279 val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1); 280 if (chan->band == NL80211_BAND_2GHZ) 281 use_lna = !(val & MT_EE_NIC_CONF_1_LNA_EXT_2G); 282 else 283 use_lna = !(val & MT_EE_NIC_CONF_1_LNA_EXT_5G); 284 285 if (use_lna) 286 lna = mt76x02_get_lna_gain(dev, &lna_2g, lna_5g, chan); 287 288 dev->cal.rx.lna_gain = mt76x02_sign_extend(lna, 8); 289 } 290 EXPORT_SYMBOL_GPL(mt76x2_read_rx_gain); 291 292 void mt76x2_get_rate_power(struct mt76x02_dev *dev, struct mt76x02_rate_power *t, 293 struct ieee80211_channel *chan) 294 { 295 bool is_5ghz; 296 u16 val; 297 298 is_5ghz = chan->band == NL80211_BAND_5GHZ; 299 300 memset(t, 0, sizeof(*t)); 301 302 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_CCK); 303 t->cck[0] = t->cck[1] = mt76x02_rate_power_val(val); 304 t->cck[2] = t->cck[3] = mt76x02_rate_power_val(val >> 8); 305 306 if (is_5ghz) 307 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_OFDM_5G_6M); 308 else 309 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_OFDM_2G_6M); 310 t->ofdm[0] = t->ofdm[1] = mt76x02_rate_power_val(val); 311 t->ofdm[2] = t->ofdm[3] = mt76x02_rate_power_val(val >> 8); 312 313 if (is_5ghz) 314 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_OFDM_5G_24M); 315 else 316 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_OFDM_2G_24M); 317 t->ofdm[4] = t->ofdm[5] = mt76x02_rate_power_val(val); 318 t->ofdm[6] = t->ofdm[7] = mt76x02_rate_power_val(val >> 8); 319 320 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_HT_MCS0); 321 t->ht[0] = t->ht[1] = mt76x02_rate_power_val(val); 322 t->ht[2] = t->ht[3] = mt76x02_rate_power_val(val >> 8); 323 324 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_HT_MCS4); 325 t->ht[4] = t->ht[5] = mt76x02_rate_power_val(val); 326 t->ht[6] = t->ht[7] = mt76x02_rate_power_val(val >> 8); 327 328 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_HT_MCS8); 329 t->ht[8] = t->ht[9] = mt76x02_rate_power_val(val); 330 t->ht[10] = t->ht[11] = mt76x02_rate_power_val(val >> 8); 331 332 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_HT_MCS12); 333 t->ht[12] = t->ht[13] = mt76x02_rate_power_val(val); 334 t->ht[14] = t->ht[15] = mt76x02_rate_power_val(val >> 8); 335 336 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_VHT_MCS8); 337 if (!is_5ghz) 338 val >>= 8; 339 t->vht[0] = t->vht[1] = mt76x02_rate_power_val(val >> 8); 340 } 341 EXPORT_SYMBOL_GPL(mt76x2_get_rate_power); 342 343 static void 344 mt76x2_get_power_info_2g(struct mt76x02_dev *dev, 345 struct mt76x2_tx_power_info *t, 346 struct ieee80211_channel *chan, 347 int chain, int offset) 348 { 349 int channel = chan->hw_value; 350 int delta_idx; 351 u8 data[6]; 352 u16 val; 353 354 if (channel < 6) 355 delta_idx = 3; 356 else if (channel < 11) 357 delta_idx = 4; 358 else 359 delta_idx = 5; 360 361 mt76x02_eeprom_copy(dev, offset, data, sizeof(data)); 362 363 t->chain[chain].tssi_slope = data[0]; 364 t->chain[chain].tssi_offset = data[1]; 365 t->chain[chain].target_power = data[2]; 366 t->chain[chain].delta = 367 mt76x02_sign_extend_optional(data[delta_idx], 7); 368 369 val = mt76x02_eeprom_get(dev, MT_EE_RF_2G_TSSI_OFF_TXPOWER); 370 t->target_power = val >> 8; 371 } 372 373 static void 374 mt76x2_get_power_info_5g(struct mt76x02_dev *dev, 375 struct mt76x2_tx_power_info *t, 376 struct ieee80211_channel *chan, 377 int chain, int offset) 378 { 379 int channel = chan->hw_value; 380 enum mt76x2_cal_channel_group group; 381 int delta_idx; 382 u16 val; 383 u8 data[5]; 384 385 group = mt76x2_get_cal_channel_group(channel); 386 offset += group * MT_TX_POWER_GROUP_SIZE_5G; 387 388 if (channel >= 192) 389 delta_idx = 4; 390 else if (channel >= 184) 391 delta_idx = 3; 392 else if (channel < 44) 393 delta_idx = 3; 394 else if (channel < 52) 395 delta_idx = 4; 396 else if (channel < 58) 397 delta_idx = 3; 398 else if (channel < 98) 399 delta_idx = 4; 400 else if (channel < 106) 401 delta_idx = 3; 402 else if (channel < 116) 403 delta_idx = 4; 404 else if (channel < 130) 405 delta_idx = 3; 406 else if (channel < 149) 407 delta_idx = 4; 408 else if (channel < 157) 409 delta_idx = 3; 410 else 411 delta_idx = 4; 412 413 mt76x02_eeprom_copy(dev, offset, data, sizeof(data)); 414 415 t->chain[chain].tssi_slope = data[0]; 416 t->chain[chain].tssi_offset = data[1]; 417 t->chain[chain].target_power = data[2]; 418 t->chain[chain].delta = 419 mt76x02_sign_extend_optional(data[delta_idx], 7); 420 421 val = mt76x02_eeprom_get(dev, MT_EE_RF_2G_RX_HIGH_GAIN); 422 t->target_power = val & 0xff; 423 } 424 425 void mt76x2_get_power_info(struct mt76x02_dev *dev, 426 struct mt76x2_tx_power_info *t, 427 struct ieee80211_channel *chan) 428 { 429 u16 bw40, bw80; 430 431 memset(t, 0, sizeof(*t)); 432 433 bw40 = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_DELTA_BW40); 434 bw80 = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_DELTA_BW80); 435 436 if (chan->band == NL80211_BAND_5GHZ) { 437 bw40 >>= 8; 438 mt76x2_get_power_info_5g(dev, t, chan, 0, 439 MT_EE_TX_POWER_0_START_5G); 440 mt76x2_get_power_info_5g(dev, t, chan, 1, 441 MT_EE_TX_POWER_1_START_5G); 442 } else { 443 mt76x2_get_power_info_2g(dev, t, chan, 0, 444 MT_EE_TX_POWER_0_START_2G); 445 mt76x2_get_power_info_2g(dev, t, chan, 1, 446 MT_EE_TX_POWER_1_START_2G); 447 } 448 449 if (mt76x2_tssi_enabled(dev) || 450 !mt76x02_field_valid(t->target_power)) 451 t->target_power = t->chain[0].target_power; 452 453 t->delta_bw40 = mt76x02_rate_power_val(bw40); 454 t->delta_bw80 = mt76x02_rate_power_val(bw80); 455 } 456 EXPORT_SYMBOL_GPL(mt76x2_get_power_info); 457 458 int mt76x2_get_temp_comp(struct mt76x02_dev *dev, struct mt76x2_temp_comp *t) 459 { 460 enum nl80211_band band = dev->mphy.chandef.chan->band; 461 u16 val, slope; 462 u8 bounds; 463 464 memset(t, 0, sizeof(*t)); 465 466 if (!mt76x2_temp_tx_alc_enabled(dev)) 467 return -EINVAL; 468 469 if (!mt76x02_ext_pa_enabled(dev, band)) 470 return -EINVAL; 471 472 val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_EXT_PA_5G) >> 8; 473 t->temp_25_ref = val & 0x7f; 474 if (band == NL80211_BAND_5GHZ) { 475 slope = mt76x02_eeprom_get(dev, MT_EE_RF_TEMP_COMP_SLOPE_5G); 476 bounds = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_EXT_PA_5G); 477 } else { 478 slope = mt76x02_eeprom_get(dev, MT_EE_RF_TEMP_COMP_SLOPE_2G); 479 bounds = mt76x02_eeprom_get(dev, 480 MT_EE_TX_POWER_DELTA_BW80) >> 8; 481 } 482 483 t->high_slope = slope & 0xff; 484 t->low_slope = slope >> 8; 485 t->lower_bound = 0 - (bounds & 0xf); 486 t->upper_bound = (bounds >> 4) & 0xf; 487 488 return 0; 489 } 490 EXPORT_SYMBOL_GPL(mt76x2_get_temp_comp); 491 492 int mt76x2_eeprom_init(struct mt76x02_dev *dev) 493 { 494 int ret; 495 496 ret = mt76x2_eeprom_load(dev); 497 if (ret) 498 return ret; 499 500 mt76x02_eeprom_parse_hw_cap(dev); 501 mt76x2_eeprom_get_macaddr(dev); 502 mt76_eeprom_override(&dev->mphy); 503 dev->mphy.macaddr[0] &= ~BIT(1); 504 505 return 0; 506 } 507 EXPORT_SYMBOL_GPL(mt76x2_eeprom_init); 508 509 MODULE_LICENSE("Dual BSD/GPL"); 510