LXR linux/drivers/net/wireless/mediatek/mt76/mt7921/eeprom.c

   1// SPDX-License-Identifier: ISC
   2/* Copyright (C) 2020 MediaTek Inc. */
   3
   4#include "mt7921.h"
   5#include "eeprom.h"
   6
   7static u32 mt7921_eeprom_read(struct mt7921_dev *dev, u32 offset)
   8{
   9        u8 *data = dev->mt76.eeprom.data;
  10
  11        if (data[offset] == 0xff)
  12                mt7921_mcu_get_eeprom(dev, offset);
  13
  14        return data[offset];
  15}
  16
  17static int mt7921_eeprom_load(struct mt7921_dev *dev)
  18{
  19        int ret;
  20
  21        ret = mt76_eeprom_init(&dev->mt76, MT7921_EEPROM_SIZE);
  22        if (ret < 0)
  23                return ret;
  24
  25        memset(dev->mt76.eeprom.data, -1, MT7921_EEPROM_SIZE);
  26
  27        return 0;
  28}
  29
  30static int mt7921_check_eeprom(struct mt7921_dev *dev)
  31{
  32        u8 *eeprom = dev->mt76.eeprom.data;
  33        u16 val;
  34
  35        mt7921_eeprom_read(dev, MT_EE_CHIP_ID);
  36        val = get_unaligned_le16(eeprom);
  37
  38        switch (val) {
  39        case 0x7961:
  40                return 0;
  41        default:
  42                return -EINVAL;
  43        }
  44}
  45
  46void mt7921_eeprom_parse_band_config(struct mt7921_phy *phy)
  47{
  48        struct mt7921_dev *dev = phy->dev;
  49        u32 val;
  50
  51        val = mt7921_eeprom_read(dev, MT_EE_WIFI_CONF);
  52        val = FIELD_GET(MT_EE_WIFI_CONF_BAND_SEL, val);
  53
  54        switch (val) {
  55        case MT_EE_5GHZ:
  56                phy->mt76->cap.has_5ghz = true;
  57                break;
  58        case MT_EE_2GHZ:
  59                phy->mt76->cap.has_2ghz = true;
  60                break;
  61        default:
  62                phy->mt76->cap.has_2ghz = true;
  63                phy->mt76->cap.has_5ghz = true;
  64                break;
  65        }
  66}
  67
  68static void mt7921_eeprom_parse_hw_cap(struct mt7921_dev *dev)
  69{
  70        u8 tx_mask;
  71
  72        mt7921_eeprom_parse_band_config(&dev->phy);
  73
  74        /* TODO: read NSS with MCU_CMD_NIC_CAPV2 */
  75        tx_mask = 2;
  76        dev->chainmask = BIT(tx_mask) - 1;
  77        dev->mphy.antenna_mask = dev->chainmask;
  78        dev->mphy.chainmask = dev->mphy.antenna_mask;
  79}
  80
  81int mt7921_eeprom_init(struct mt7921_dev *dev)
  82{
  83        int ret;
  84
  85        ret = mt7921_eeprom_load(dev);
  86        if (ret < 0)
  87                return ret;
  88
  89        ret = mt7921_check_eeprom(dev);
  90        if (ret)
  91                return ret;
  92
  93        mt7921_eeprom_parse_hw_cap(dev);
  94        memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
  95               ETH_ALEN);
  96
  97        mt76_eeprom_override(&dev->mphy);
  98
  99        return 0;
 100}
 101