1 // SPDX-License-Identifier: ISC 2 /* Copyright (C) 2020 MediaTek Inc. */ 3 4 #include "mt7915.h" 5 #include "eeprom.h" 6 7 static inline bool mt7915_efuse_valid(u8 val) 8 { 9 return !(val == 0xff); 10 } 11 12 u32 mt7915_eeprom_read(struct mt7915_dev *dev, u32 offset) 13 { 14 u8 *data = dev->mt76.eeprom.data; 15 16 if (!mt7915_efuse_valid(data[offset])) 17 mt7915_mcu_get_eeprom(dev, offset); 18 19 return data[offset]; 20 } 21 22 static int mt7915_eeprom_load(struct mt7915_dev *dev) 23 { 24 int ret; 25 26 ret = mt76_eeprom_init(&dev->mt76, MT7915_EEPROM_SIZE); 27 if (ret < 0) 28 return ret; 29 30 memset(dev->mt76.eeprom.data, -1, MT7915_EEPROM_SIZE); 31 32 return 0; 33 } 34 35 static int mt7915_check_eeprom(struct mt7915_dev *dev) 36 { 37 u16 val; 38 u8 *eeprom = dev->mt76.eeprom.data; 39 40 mt7915_eeprom_read(dev, 0); 41 val = get_unaligned_le16(eeprom); 42 43 switch (val) { 44 case 0x7915: 45 return 0; 46 default: 47 return -EINVAL; 48 } 49 } 50 51 static void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev) 52 { 53 u8 *eeprom = dev->mt76.eeprom.data; 54 u8 tx_mask, max_nss = 4; 55 u32 val = mt7915_eeprom_read(dev, MT_EE_WIFI_CONF); 56 57 val = FIELD_GET(MT_EE_WIFI_CONF_BAND_SEL, val); 58 switch (val) { 59 case MT_EE_5GHZ: 60 dev->mt76.cap.has_5ghz = true; 61 break; 62 case MT_EE_2GHZ: 63 dev->mt76.cap.has_2ghz = true; 64 break; 65 default: 66 dev->mt76.cap.has_2ghz = true; 67 dev->mt76.cap.has_5ghz = true; 68 break; 69 } 70 71 /* read tx mask from eeprom */ 72 tx_mask = FIELD_GET(MT_EE_WIFI_CONF_TX_MASK, 73 eeprom[MT_EE_WIFI_CONF]); 74 if (!tx_mask || tx_mask > max_nss) 75 tx_mask = max_nss; 76 77 dev->chainmask = BIT(tx_mask) - 1; 78 dev->mphy.antenna_mask = dev->chainmask; 79 dev->phy.chainmask = dev->chainmask; 80 } 81 82 int mt7915_eeprom_init(struct mt7915_dev *dev) 83 { 84 int ret; 85 86 ret = mt7915_eeprom_load(dev); 87 if (ret < 0) 88 return ret; 89 90 ret = mt7915_check_eeprom(dev); 91 if (ret) 92 return ret; 93 94 mt7915_eeprom_parse_hw_cap(dev); 95 memcpy(dev->mt76.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR, 96 ETH_ALEN); 97 98 mt76_eeprom_override(&dev->mt76); 99 100 return 0; 101 } 102 103 int mt7915_eeprom_get_target_power(struct mt7915_dev *dev, 104 struct ieee80211_channel *chan, 105 u8 chain_idx) 106 { 107 int index; 108 bool tssi_on; 109 110 if (chain_idx > 3) 111 return -EINVAL; 112 113 tssi_on = mt7915_tssi_enabled(dev, chan->band); 114 115 if (chan->band == NL80211_BAND_2GHZ) { 116 index = MT_EE_TX0_POWER_2G + chain_idx * 3 + !tssi_on; 117 } else { 118 int group = tssi_on ? 119 mt7915_get_channel_group(chan->hw_value) : 8; 120 121 index = MT_EE_TX0_POWER_5G + chain_idx * 12 + group; 122 } 123 124 return mt7915_eeprom_read(dev, index); 125 } 126 127 static const u8 sku_cck_delta_map[] = { 128 SKU_CCK_GROUP0, 129 SKU_CCK_GROUP0, 130 SKU_CCK_GROUP1, 131 SKU_CCK_GROUP1, 132 }; 133 134 static const u8 sku_ofdm_delta_map[] = { 135 SKU_OFDM_GROUP0, 136 SKU_OFDM_GROUP0, 137 SKU_OFDM_GROUP1, 138 SKU_OFDM_GROUP1, 139 SKU_OFDM_GROUP2, 140 SKU_OFDM_GROUP2, 141 SKU_OFDM_GROUP3, 142 SKU_OFDM_GROUP4, 143 }; 144 145 static const u8 sku_mcs_delta_map[] = { 146 SKU_MCS_GROUP0, 147 SKU_MCS_GROUP1, 148 SKU_MCS_GROUP1, 149 SKU_MCS_GROUP2, 150 SKU_MCS_GROUP2, 151 SKU_MCS_GROUP3, 152 SKU_MCS_GROUP4, 153 SKU_MCS_GROUP5, 154 SKU_MCS_GROUP6, 155 SKU_MCS_GROUP7, 156 SKU_MCS_GROUP8, 157 SKU_MCS_GROUP9, 158 }; 159 160 #define SKU_GROUP(_mode, _len, _ofs_2g, _ofs_5g, _map) \ 161 [_mode] = { \ 162 .len = _len, \ 163 .offset = { \ 164 _ofs_2g, \ 165 _ofs_5g, \ 166 }, \ 167 .delta_map = _map \ 168 } 169 170 const struct sku_group mt7915_sku_groups[] = { 171 SKU_GROUP(SKU_CCK, 4, 0x252, 0, sku_cck_delta_map), 172 SKU_GROUP(SKU_OFDM, 8, 0x254, 0x29d, sku_ofdm_delta_map), 173 174 SKU_GROUP(SKU_HT_BW20, 8, 0x259, 0x2a2, sku_mcs_delta_map), 175 SKU_GROUP(SKU_HT_BW40, 9, 0x262, 0x2ab, sku_mcs_delta_map), 176 SKU_GROUP(SKU_VHT_BW20, 12, 0x259, 0x2a2, sku_mcs_delta_map), 177 SKU_GROUP(SKU_VHT_BW40, 12, 0x262, 0x2ab, sku_mcs_delta_map), 178 SKU_GROUP(SKU_VHT_BW80, 12, 0, 0x2b4, sku_mcs_delta_map), 179 SKU_GROUP(SKU_VHT_BW160, 12, 0, 0, sku_mcs_delta_map), 180 181 SKU_GROUP(SKU_HE_RU26, 12, 0x27f, 0x2dd, sku_mcs_delta_map), 182 SKU_GROUP(SKU_HE_RU52, 12, 0x289, 0x2e7, sku_mcs_delta_map), 183 SKU_GROUP(SKU_HE_RU106, 12, 0x293, 0x2f1, sku_mcs_delta_map), 184 SKU_GROUP(SKU_HE_RU242, 12, 0x26b, 0x2bf, sku_mcs_delta_map), 185 SKU_GROUP(SKU_HE_RU484, 12, 0x275, 0x2c9, sku_mcs_delta_map), 186 SKU_GROUP(SKU_HE_RU996, 12, 0, 0x2d3, sku_mcs_delta_map), 187 SKU_GROUP(SKU_HE_RU2x996, 12, 0, 0, sku_mcs_delta_map), 188 }; 189 190 static s8 191 mt7915_get_sku_delta(struct mt7915_dev *dev, u32 addr) 192 { 193 u32 val = mt7915_eeprom_read(dev, addr); 194 s8 delta = FIELD_GET(SKU_DELTA_VAL, val); 195 196 if (!(val & SKU_DELTA_EN)) 197 return 0; 198 199 return val & SKU_DELTA_ADD ? delta : -delta; 200 } 201 202 static void 203 mt7915_eeprom_init_sku_band(struct mt7915_dev *dev, 204 struct ieee80211_supported_band *sband) 205 { 206 int i, band = sband->band; 207 s8 *rate_power = dev->rate_power[band], max_delta = 0; 208 u8 idx = 0; 209 210 for (i = 0; i < ARRAY_SIZE(mt7915_sku_groups); i++) { 211 const struct sku_group *sku = &mt7915_sku_groups[i]; 212 u32 offset = sku->offset[band]; 213 int j; 214 215 if (!offset) { 216 idx += sku->len; 217 continue; 218 } 219 220 rate_power[idx++] = mt7915_get_sku_delta(dev, offset); 221 if (rate_power[idx - 1] > max_delta) 222 max_delta = rate_power[idx - 1]; 223 224 if (i == SKU_HT_BW20 || i == SKU_VHT_BW20) 225 offset += 1; 226 227 for (j = 1; j < sku->len; j++) { 228 u32 addr = offset + sku->delta_map[j]; 229 230 rate_power[idx++] = mt7915_get_sku_delta(dev, addr); 231 if (rate_power[idx - 1] > max_delta) 232 max_delta = rate_power[idx - 1]; 233 } 234 } 235 236 rate_power[idx] = max_delta; 237 } 238 239 void mt7915_eeprom_init_sku(struct mt7915_dev *dev) 240 { 241 mt7915_eeprom_init_sku_band(dev, &dev->mphy.sband_2g.sband); 242 mt7915_eeprom_init_sku_band(dev, &dev->mphy.sband_5g.sband); 243 } 244