1 // SPDX-License-Identifier: ISC 2 /* Copyright (C) 2020 MediaTek Inc. */ 3 4 #include "mt7915.h" 5 #include "eeprom.h" 6 7 static u32 mt7915_eeprom_read(struct mt7915_dev *dev, u32 offset) 8 { 9 u8 *data = dev->mt76.eeprom.data; 10 11 if (data[offset] == 0xff) 12 mt7915_mcu_get_eeprom(dev, offset); 13 14 return data[offset]; 15 } 16 17 static int mt7915_eeprom_load(struct mt7915_dev *dev) 18 { 19 int ret; 20 21 ret = mt76_eeprom_init(&dev->mt76, MT7915_EEPROM_SIZE); 22 if (ret < 0) 23 return ret; 24 25 memset(dev->mt76.eeprom.data, -1, MT7915_EEPROM_SIZE); 26 27 return 0; 28 } 29 30 static int mt7915_check_eeprom(struct mt7915_dev *dev) 31 { 32 u8 *eeprom = dev->mt76.eeprom.data; 33 u16 val; 34 35 mt7915_eeprom_read(dev, MT_EE_CHIP_ID); 36 val = get_unaligned_le16(eeprom); 37 38 switch (val) { 39 case 0x7915: 40 return 0; 41 default: 42 return -EINVAL; 43 } 44 } 45 46 void mt7915_eeprom_parse_band_config(struct mt7915_phy *phy) 47 { 48 struct mt7915_dev *dev = phy->dev; 49 bool ext_phy = phy != &dev->phy; 50 u32 val; 51 52 val = mt7915_eeprom_read(dev, MT_EE_WIFI_CONF + ext_phy); 53 val = FIELD_GET(MT_EE_WIFI_CONF_BAND_SEL, val); 54 switch (val) { 55 case MT_EE_5GHZ: 56 phy->mt76->cap.has_5ghz = true; 57 break; 58 case MT_EE_2GHZ: 59 phy->mt76->cap.has_2ghz = true; 60 break; 61 default: 62 phy->mt76->cap.has_2ghz = true; 63 phy->mt76->cap.has_5ghz = true; 64 break; 65 } 66 } 67 68 static void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev) 69 { 70 u8 nss, tx_mask[2] = {}, *eeprom = dev->mt76.eeprom.data; 71 72 mt7915_eeprom_parse_band_config(&dev->phy); 73 74 /* read tx mask from eeprom */ 75 tx_mask[0] = FIELD_GET(MT_EE_WIFI_CONF_TX_MASK, 76 eeprom[MT_EE_WIFI_CONF]); 77 if (dev->dbdc_support) 78 tx_mask[1] = FIELD_GET(MT_EE_WIFI_CONF_TX_MASK, 79 eeprom[MT_EE_WIFI_CONF + 1]); 80 81 nss = tx_mask[0] + tx_mask[1]; 82 if (!nss || nss > 4) { 83 tx_mask[0] = 4; 84 nss = 4; 85 } 86 87 dev->chainmask = BIT(nss) - 1; 88 dev->mphy.antenna_mask = BIT(tx_mask[0]) - 1; 89 dev->phy.chainmask = dev->mphy.antenna_mask; 90 } 91 92 int mt7915_eeprom_init(struct mt7915_dev *dev) 93 { 94 int ret; 95 96 ret = mt7915_eeprom_load(dev); 97 if (ret < 0) 98 return ret; 99 100 ret = mt7915_check_eeprom(dev); 101 if (ret) 102 return ret; 103 104 mt7915_eeprom_parse_hw_cap(dev); 105 memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR, 106 ETH_ALEN); 107 108 mt76_eeprom_override(&dev->mphy); 109 110 return 0; 111 } 112 113 int mt7915_eeprom_get_target_power(struct mt7915_dev *dev, 114 struct ieee80211_channel *chan, 115 u8 chain_idx) 116 { 117 int index; 118 bool tssi_on; 119 120 if (chain_idx > 3) 121 return -EINVAL; 122 123 tssi_on = mt7915_tssi_enabled(dev, chan->band); 124 125 if (chan->band == NL80211_BAND_2GHZ) { 126 index = MT_EE_TX0_POWER_2G + chain_idx * 3 + !tssi_on; 127 } else { 128 int group = tssi_on ? 129 mt7915_get_channel_group(chan->hw_value) : 8; 130 131 index = MT_EE_TX0_POWER_5G + chain_idx * 12 + group; 132 } 133 134 return mt7915_eeprom_read(dev, index); 135 } 136 137 static const u8 sku_cck_delta_map[] = { 138 SKU_CCK_GROUP0, 139 SKU_CCK_GROUP0, 140 SKU_CCK_GROUP1, 141 SKU_CCK_GROUP1, 142 }; 143 144 static const u8 sku_ofdm_delta_map[] = { 145 SKU_OFDM_GROUP0, 146 SKU_OFDM_GROUP0, 147 SKU_OFDM_GROUP1, 148 SKU_OFDM_GROUP1, 149 SKU_OFDM_GROUP2, 150 SKU_OFDM_GROUP2, 151 SKU_OFDM_GROUP3, 152 SKU_OFDM_GROUP4, 153 }; 154 155 static const u8 sku_mcs_delta_map[] = { 156 SKU_MCS_GROUP0, 157 SKU_MCS_GROUP1, 158 SKU_MCS_GROUP1, 159 SKU_MCS_GROUP2, 160 SKU_MCS_GROUP2, 161 SKU_MCS_GROUP3, 162 SKU_MCS_GROUP4, 163 SKU_MCS_GROUP5, 164 SKU_MCS_GROUP6, 165 SKU_MCS_GROUP7, 166 SKU_MCS_GROUP8, 167 SKU_MCS_GROUP9, 168 }; 169 170 #define SKU_GROUP(_mode, _len, _ofs_2g, _ofs_5g, _map) \ 171 [_mode] = { \ 172 .len = _len, \ 173 .offset = { \ 174 _ofs_2g, \ 175 _ofs_5g, \ 176 }, \ 177 .delta_map = _map \ 178 } 179 180 const struct sku_group mt7915_sku_groups[] = { 181 SKU_GROUP(SKU_CCK, 4, 0x252, 0, sku_cck_delta_map), 182 SKU_GROUP(SKU_OFDM, 8, 0x254, 0x29d, sku_ofdm_delta_map), 183 184 SKU_GROUP(SKU_HT_BW20, 8, 0x259, 0x2a2, sku_mcs_delta_map), 185 SKU_GROUP(SKU_HT_BW40, 9, 0x262, 0x2ab, sku_mcs_delta_map), 186 SKU_GROUP(SKU_VHT_BW20, 12, 0x259, 0x2a2, sku_mcs_delta_map), 187 SKU_GROUP(SKU_VHT_BW40, 12, 0x262, 0x2ab, sku_mcs_delta_map), 188 SKU_GROUP(SKU_VHT_BW80, 12, 0, 0x2b4, sku_mcs_delta_map), 189 SKU_GROUP(SKU_VHT_BW160, 12, 0, 0, sku_mcs_delta_map), 190 191 SKU_GROUP(SKU_HE_RU26, 12, 0x27f, 0x2dd, sku_mcs_delta_map), 192 SKU_GROUP(SKU_HE_RU52, 12, 0x289, 0x2e7, sku_mcs_delta_map), 193 SKU_GROUP(SKU_HE_RU106, 12, 0x293, 0x2f1, sku_mcs_delta_map), 194 SKU_GROUP(SKU_HE_RU242, 12, 0x26b, 0x2bf, sku_mcs_delta_map), 195 SKU_GROUP(SKU_HE_RU484, 12, 0x275, 0x2c9, sku_mcs_delta_map), 196 SKU_GROUP(SKU_HE_RU996, 12, 0, 0x2d3, sku_mcs_delta_map), 197 SKU_GROUP(SKU_HE_RU2x996, 12, 0, 0, sku_mcs_delta_map), 198 }; 199 200 static s8 201 mt7915_get_sku_delta(struct mt7915_dev *dev, u32 addr) 202 { 203 u32 val = mt7915_eeprom_read(dev, addr); 204 s8 delta = FIELD_GET(SKU_DELTA_VAL, val); 205 206 if (!(val & SKU_DELTA_EN)) 207 return 0; 208 209 return val & SKU_DELTA_ADD ? delta : -delta; 210 } 211 212 static void 213 mt7915_eeprom_init_sku_band(struct mt7915_dev *dev, 214 struct ieee80211_supported_band *sband) 215 { 216 int i, band = sband->band; 217 s8 *rate_power = dev->rate_power[band], max_delta = 0; 218 u8 idx = 0; 219 220 for (i = 0; i < ARRAY_SIZE(mt7915_sku_groups); i++) { 221 const struct sku_group *sku = &mt7915_sku_groups[i]; 222 u32 offset = sku->offset[band]; 223 int j; 224 225 if (!offset) { 226 idx += sku->len; 227 continue; 228 } 229 230 rate_power[idx++] = mt7915_get_sku_delta(dev, offset); 231 if (rate_power[idx - 1] > max_delta) 232 max_delta = rate_power[idx - 1]; 233 234 if (i == SKU_HT_BW20 || i == SKU_VHT_BW20) 235 offset += 1; 236 237 for (j = 1; j < sku->len; j++) { 238 u32 addr = offset + sku->delta_map[j]; 239 240 rate_power[idx++] = mt7915_get_sku_delta(dev, addr); 241 if (rate_power[idx - 1] > max_delta) 242 max_delta = rate_power[idx - 1]; 243 } 244 } 245 246 rate_power[idx] = max_delta; 247 } 248 249 void mt7915_eeprom_init_sku(struct mt7915_dev *dev) 250 { 251 mt7915_eeprom_init_sku_band(dev, &dev->mphy.sband_2g.sband); 252 mt7915_eeprom_init_sku_band(dev, &dev->mphy.sband_5g.sband); 253 } 254