diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c new file mode 100644 index 000000000000..7deba7ebd68a --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c @@ -0,0 +1,243 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2020 MediaTek Inc. */ + +#include "mt7915.h" +#include "eeprom.h" + +static inline bool mt7915_efuse_valid(u8 val) +{ + return !(val == 0xff); +} + +u32 mt7915_eeprom_read(struct mt7915_dev *dev, u32 offset) +{ + u8 *data = dev->mt76.eeprom.data; + + if (!mt7915_efuse_valid(data[offset])) + mt7915_mcu_get_eeprom(dev, offset); + + return data[offset]; +} + +static int mt7915_eeprom_load(struct mt7915_dev *dev) +{ + int ret; + + ret = mt76_eeprom_init(&dev->mt76, MT7915_EEPROM_SIZE); + if (ret < 0) + return ret; + + memset(dev->mt76.eeprom.data, -1, MT7915_EEPROM_SIZE); + + return 0; +} + +static int mt7915_check_eeprom(struct mt7915_dev *dev) +{ + u16 val; + u8 *eeprom = dev->mt76.eeprom.data; + + mt7915_eeprom_read(dev, 0); + val = get_unaligned_le16(eeprom); + + switch (val) { + case 0x7915: + return 0; + default: + return -EINVAL; + } +} + +static void mt7915_eeprom_parse_hw_cap(struct mt7915_dev *dev) +{ + u8 *eeprom = dev->mt76.eeprom.data; + u8 tx_mask, max_nss = 4; + u32 val = mt7915_eeprom_read(dev, MT_EE_WIFI_CONF); + + val = FIELD_GET(MT_EE_WIFI_CONF_BAND_SEL, val); + switch (val) { + case MT_EE_5GHZ: + dev->mt76.cap.has_5ghz = true; + break; + case MT_EE_2GHZ: + dev->mt76.cap.has_2ghz = true; + break; + default: + dev->mt76.cap.has_2ghz = true; + dev->mt76.cap.has_5ghz = true; + break; + } + + /* read tx mask from eeprom */ + tx_mask = FIELD_GET(MT_EE_WIFI_CONF_TX_MASK, + eeprom[MT_EE_WIFI_CONF]); + if (!tx_mask || tx_mask > max_nss) + tx_mask = max_nss; + + dev->chainmask = BIT(tx_mask) - 1; + dev->mphy.antenna_mask = dev->chainmask; + dev->phy.chainmask = dev->chainmask; +} + +int mt7915_eeprom_init(struct mt7915_dev *dev) +{ + int ret; + + ret = mt7915_eeprom_load(dev); + if (ret < 0) + return ret; + + ret = mt7915_check_eeprom(dev); + if (ret) + return ret; + + mt7915_eeprom_parse_hw_cap(dev); + memcpy(dev->mt76.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR, + ETH_ALEN); + + mt76_eeprom_override(&dev->mt76); + + return 0; +} + +int mt7915_eeprom_get_target_power(struct mt7915_dev *dev, + struct ieee80211_channel *chan, + u8 chain_idx) +{ + int index; + bool tssi_on; + + if (chain_idx > 3) + return -EINVAL; + + tssi_on = mt7915_tssi_enabled(dev, chan->band); + + if (chan->band == NL80211_BAND_2GHZ) { + index = MT_EE_TX0_POWER_2G + chain_idx * 3 + !tssi_on; + } else { + int group = tssi_on ? + mt7915_get_channel_group(chan->hw_value) : 8; + + index = MT_EE_TX0_POWER_5G + chain_idx * 12 + group; + } + + return mt7915_eeprom_read(dev, index); +} + +static const u8 sku_cck_delta_map[] = { + SKU_CCK_GROUP0, + SKU_CCK_GROUP0, + SKU_CCK_GROUP1, + SKU_CCK_GROUP1, +}; + +static const u8 sku_ofdm_delta_map[] = { + SKU_OFDM_GROUP0, + SKU_OFDM_GROUP0, + SKU_OFDM_GROUP1, + SKU_OFDM_GROUP1, + SKU_OFDM_GROUP2, + SKU_OFDM_GROUP2, + SKU_OFDM_GROUP3, + SKU_OFDM_GROUP4, +}; + +static const u8 sku_mcs_delta_map[] = { + SKU_MCS_GROUP0, + SKU_MCS_GROUP1, + SKU_MCS_GROUP1, + SKU_MCS_GROUP2, + SKU_MCS_GROUP2, + SKU_MCS_GROUP3, + SKU_MCS_GROUP4, + SKU_MCS_GROUP5, + SKU_MCS_GROUP6, + SKU_MCS_GROUP7, + SKU_MCS_GROUP8, + SKU_MCS_GROUP9, +}; + +#define SKU_GROUP(_mode, _len, _ofs_2g, _ofs_5g, _map) \ + [_mode] = { \ + .len = _len, \ + .offset = { \ + _ofs_2g, \ + _ofs_5g, \ + }, \ + .delta_map = _map \ +} + +const struct sku_group mt7915_sku_groups[] = { + SKU_GROUP(SKU_CCK, 4, 0x252, 0, sku_cck_delta_map), + SKU_GROUP(SKU_OFDM, 8, 0x254, 0x29d, sku_ofdm_delta_map), + + SKU_GROUP(SKU_HT_BW20, 8, 0x259, 0x2a2, sku_mcs_delta_map), + SKU_GROUP(SKU_HT_BW40, 9, 0x262, 0x2ab, sku_mcs_delta_map), + SKU_GROUP(SKU_VHT_BW20, 12, 0x259, 0x2a2, sku_mcs_delta_map), + SKU_GROUP(SKU_VHT_BW40, 12, 0x262, 0x2ab, sku_mcs_delta_map), + SKU_GROUP(SKU_VHT_BW80, 12, 0, 0x2b4, sku_mcs_delta_map), + SKU_GROUP(SKU_VHT_BW160, 12, 0, 0, sku_mcs_delta_map), + + SKU_GROUP(SKU_HE_RU26, 12, 0x27f, 0x2dd, sku_mcs_delta_map), + SKU_GROUP(SKU_HE_RU52, 12, 0x289, 0x2e7, sku_mcs_delta_map), + SKU_GROUP(SKU_HE_RU106, 12, 0x293, 0x2f1, sku_mcs_delta_map), + SKU_GROUP(SKU_HE_RU242, 12, 0x26b, 0x2bf, sku_mcs_delta_map), + SKU_GROUP(SKU_HE_RU484, 12, 0x275, 0x2c9, sku_mcs_delta_map), + SKU_GROUP(SKU_HE_RU996, 12, 0, 0x2d3, sku_mcs_delta_map), + SKU_GROUP(SKU_HE_RU2x996, 12, 0, 0, sku_mcs_delta_map), +}; + +static s8 +mt7915_get_sku_delta(struct mt7915_dev *dev, u32 addr) +{ + u32 val = mt7915_eeprom_read(dev, addr); + s8 delta = FIELD_GET(SKU_DELTA_VAL, val); + + if (!(val & SKU_DELTA_EN)) + return 0; + + return val & SKU_DELTA_ADD ? delta : -delta; +} + +static void +mt7915_eeprom_init_sku_band(struct mt7915_dev *dev, + struct ieee80211_supported_band *sband) +{ + int i, band = sband->band; + s8 *rate_power = dev->rate_power[band], max_delta = 0; + u8 idx = 0; + + for (i = 0; i < ARRAY_SIZE(mt7915_sku_groups); i++) { + const struct sku_group *sku = &mt7915_sku_groups[i]; + u32 offset = sku->offset[band]; + int j; + + if (!offset) { + idx += sku->len; + continue; + } + + rate_power[idx++] = mt7915_get_sku_delta(dev, offset); + if (rate_power[idx - 1] > max_delta) + max_delta = rate_power[idx - 1]; + + if (i == SKU_HT_BW20 || i == SKU_VHT_BW20) + offset += 1; + + for (j = 1; j < sku->len; j++) { + u32 addr = offset + sku->delta_map[j]; + + rate_power[idx++] = mt7915_get_sku_delta(dev, addr); + if (rate_power[idx - 1] > max_delta) + max_delta = rate_power[idx - 1]; + } + } + + rate_power[idx] = max_delta; +} + +void mt7915_eeprom_init_sku(struct mt7915_dev *dev) +{ + mt7915_eeprom_init_sku_band(dev, &dev->mphy.sband_2g.sband); + mt7915_eeprom_init_sku_band(dev, &dev->mphy.sband_5g.sband); +} |