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mt76: mt7921: add EEPROM support

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Add EEPROM support to MT7921 to determine the capability the card has
such as indentificaiton, MAC address, the band and antenna number the
card able to support.

Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Co-developed-by: Soul Huang <Soul.Huang@mediatek.com>
Signed-off-by: Soul Huang <Soul.Huang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Sean Wang 2021-01-28 03:33:41 +08:00 committed by Felix Fietkau
parent 12d1c31788
commit bb1f6aaf71
2 changed files with 127 additions and 0 deletions
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100
drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c Normal file
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// 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;
}

27
drivers/net/wireless/mediatek/mt76/mt7921/eeprom.h Normal file
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/* 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