diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c')
-rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c | 125 |
1 files changed, 125 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..2099dd40530f --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c @@ -0,0 +1,125 @@ +// 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); +} |