diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c new file mode 100644 index 000000000000..691d14a1a7bf --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2020 MediaTek Inc. */ + +#include "mt7921.h" +#include "eeprom.h" + +static u32 mt7921_eeprom_read(struct mt7921_dev *dev, u32 offset) +{ + u8 *data = dev->mt76.eeprom.data; + + if (data[offset] == 0xff) + mt7921_mcu_get_eeprom(dev, offset); + + return data[offset]; +} + +static int mt7921_eeprom_load(struct mt7921_dev *dev) +{ + int ret; + + ret = mt76_eeprom_init(&dev->mt76, MT7921_EEPROM_SIZE); + if (ret < 0) + return ret; + + memset(dev->mt76.eeprom.data, -1, MT7921_EEPROM_SIZE); + + return 0; +} + +static int mt7921_check_eeprom(struct mt7921_dev *dev) +{ + u8 *eeprom = dev->mt76.eeprom.data; + u16 val; + + mt7921_eeprom_read(dev, MT_EE_CHIP_ID); + val = get_unaligned_le16(eeprom); + + switch (val) { + case 0x7961: + return 0; + default: + return -EINVAL; + } +} + +void mt7921_eeprom_parse_band_config(struct mt7921_phy *phy) +{ + struct mt7921_dev *dev = phy->dev; + u32 val; + + val = mt7921_eeprom_read(dev, MT_EE_WIFI_CONF); + val = FIELD_GET(MT_EE_WIFI_CONF_BAND_SEL, val); + + switch (val) { + case MT_EE_5GHZ: + phy->mt76->cap.has_5ghz = true; + break; + case MT_EE_2GHZ: + phy->mt76->cap.has_2ghz = true; + break; + default: + phy->mt76->cap.has_2ghz = true; + phy->mt76->cap.has_5ghz = true; + break; + } +} + +static void mt7921_eeprom_parse_hw_cap(struct mt7921_dev *dev) +{ + u8 tx_mask; + + mt7921_eeprom_parse_band_config(&dev->phy); + + /* TODO: read NSS with MCU_CMD_NIC_CAPV2 */ + tx_mask = 2; + dev->chainmask = BIT(tx_mask) - 1; + dev->mphy.antenna_mask = dev->chainmask; + dev->mphy.chainmask = dev->mphy.antenna_mask; +} + +int mt7921_eeprom_init(struct mt7921_dev *dev) +{ + int ret; + + ret = mt7921_eeprom_load(dev); + if (ret < 0) + return ret; + + ret = mt7921_check_eeprom(dev); + if (ret) + return ret; + + mt7921_eeprom_parse_hw_cap(dev); + memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR, + ETH_ALEN); + + mt76_eeprom_override(&dev->mphy); + + return 0; +} diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h new file mode 100644 index 000000000000..54f30401343c --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: ISC */ +/* Copyright (C) 2020 MediaTek Inc. */ + +#ifndef __MT7921_EEPROM_H +#define __MT7921_EEPROM_H + +#include "mt7921.h" + +enum mt7921_eeprom_field { + MT_EE_CHIP_ID = 0x000, + MT_EE_VERSION = 0x002, + MT_EE_MAC_ADDR = 0x004, + MT_EE_WIFI_CONF = 0x07c, + __MT_EE_MAX = 0x3bf +}; + +#define MT_EE_WIFI_CONF_TX_MASK BIT(0) +#define MT_EE_WIFI_CONF_BAND_SEL GENMASK(3, 2) + +enum mt7921_eeprom_band { + MT_EE_NA, + MT_EE_5GHZ, + MT_EE_2GHZ, + MT_EE_DUAL_BAND, +}; + +#endif