diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c new file mode 100644 index 000000000000..dc94f52e6e8b --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2019 MediaTek Inc. + * + * Author: Ryder Lee <ryder.lee@mediatek.com> + * Felix Fietkau <nbd@nbd.name> + */ + +#include "mt7615.h" +#include "eeprom.h" + +static int mt7615_efuse_read(struct mt7615_dev *dev, u32 base, + u16 addr, u8 *data) +{ + u32 val; + int i; + + val = mt76_rr(dev, base + MT_EFUSE_CTRL); + val &= ~(MT_EFUSE_CTRL_AIN | MT_EFUSE_CTRL_MODE); + val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf); + val |= MT_EFUSE_CTRL_KICK; + mt76_wr(dev, base + MT_EFUSE_CTRL, val); + + if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000)) + return -ETIMEDOUT; + + udelay(2); + + val = mt76_rr(dev, base + MT_EFUSE_CTRL); + if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT || + WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) { + memset(data, 0x0, 16); + return 0; + } + + for (i = 0; i < 4; i++) { + val = mt76_rr(dev, base + MT_EFUSE_RDATA(i)); + put_unaligned_le32(val, data + 4 * i); + } + + return 0; +} + +static int mt7615_efuse_init(struct mt7615_dev *dev) +{ + u32 val, base = mt7615_reg_map(dev, MT_EFUSE_BASE); + int i, len = MT7615_EEPROM_SIZE; + void *buf; + + val = mt76_rr(dev, base + MT_EFUSE_BASE_CTRL); + if (val & MT_EFUSE_BASE_CTRL_EMPTY) + return 0; + + dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL); + dev->mt76.otp.size = len; + if (!dev->mt76.otp.data) + return -ENOMEM; + + buf = dev->mt76.otp.data; + for (i = 0; i + 16 <= len; i += 16) { + int ret; + + ret = mt7615_efuse_read(dev, base, i, buf + i); + if (ret) + return ret; + } + + return 0; +} + +static int mt7615_eeprom_load(struct mt7615_dev *dev) +{ + int ret; + + ret = mt76_eeprom_init(&dev->mt76, MT7615_EEPROM_SIZE); + if (ret < 0) + return ret; + + return mt7615_efuse_init(dev); +} + +static int mt7615_check_eeprom(struct mt76_dev *dev) +{ + u16 val = get_unaligned_le16(dev->eeprom.data); + + switch (val) { + case 0x7615: + return 0; + default: + return -EINVAL; + } +} + +static void mt7615_eeprom_parse_hw_cap(struct mt7615_dev *dev) +{ + u8 val, *eeprom = dev->mt76.eeprom.data; + + val = FIELD_GET(MT_EE_NIC_WIFI_CONF_BAND_SEL, + eeprom[MT_EE_WIFI_CONF]); + 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; + } +} + +int mt7615_eeprom_get_power_index(struct mt7615_dev *dev, + struct ieee80211_channel *chan, + u8 chain_idx) +{ + int index; + + if (chain_idx > 3) + return -EINVAL; + + /* TSSI disabled */ + if (mt7615_ext_pa_enabled(dev, chan->band)) { + if (chan->band == NL80211_BAND_2GHZ) + return MT_EE_EXT_PA_2G_TARGET_POWER; + else + return MT_EE_EXT_PA_5G_TARGET_POWER; + } + + /* TSSI enabled */ + if (chan->band == NL80211_BAND_2GHZ) { + index = MT_EE_TX0_2G_TARGET_POWER + chain_idx * 6; + } else { + int group = mt7615_get_channel_group(chan->hw_value); + + switch (chain_idx) { + case 1: + index = MT_EE_TX1_5G_G0_TARGET_POWER; + break; + case 2: + index = MT_EE_TX2_5G_G0_TARGET_POWER; + break; + case 3: + index = MT_EE_TX3_5G_G0_TARGET_POWER; + break; + case 0: + default: + index = MT_EE_TX0_5G_G0_TARGET_POWER; + break; + } + index += 5 * group; + } + + return index; +} + +int mt7615_eeprom_init(struct mt7615_dev *dev) +{ + int ret; + + ret = mt7615_eeprom_load(dev); + if (ret < 0) + return ret; + + ret = mt7615_check_eeprom(&dev->mt76); + if (ret && dev->mt76.otp.data) + memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data, + MT7615_EEPROM_SIZE); + + mt7615_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; +} |