1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2020 MediaTek Inc. */
3
4 #include "mt7921.h"
5 #include "eeprom.h"
6
mt7921_eeprom_read(struct mt7921_dev * dev,u32 offset)7 static 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
mt7921_eeprom_load(struct mt7921_dev * dev)17 static 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
mt7921_check_eeprom(struct mt7921_dev * dev)30 static 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
mt7921_eeprom_parse_band_config(struct mt7921_phy * phy)46 void 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
mt7921_eeprom_parse_hw_cap(struct mt7921_dev * dev)68 static 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
mt7921_eeprom_init(struct mt7921_dev * dev)81 int 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
