1 // SPDX-License-Identifier: ISC
2
3 #include "mt7603.h"
4 #include "eeprom.h"
5
6 static int
mt7603_efuse_read(struct mt7603_dev * dev,u32 base,u16 addr,u8 * data)7 mt7603_efuse_read(struct mt7603_dev *dev, u32 base, u16 addr, u8 *data)
8 {
9 u32 val;
10 int i;
11
12 val = mt76_rr(dev, base + MT_EFUSE_CTRL);
13 val &= ~(MT_EFUSE_CTRL_AIN |
14 MT_EFUSE_CTRL_MODE);
15 val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf);
16 val |= MT_EFUSE_CTRL_KICK;
17 mt76_wr(dev, base + MT_EFUSE_CTRL, val);
18
19 if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000))
20 return -ETIMEDOUT;
21
22 udelay(2);
23
24 val = mt76_rr(dev, base + MT_EFUSE_CTRL);
25 if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT ||
26 WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) {
27 memset(data, 0xff, 16);
28 return 0;
29 }
30
31 for (i = 0; i < 4; i++) {
32 val = mt76_rr(dev, base + MT_EFUSE_RDATA(i));
33 put_unaligned_le32(val, data + 4 * i);
34 }
35
36 return 0;
37 }
38
39 static int
mt7603_efuse_init(struct mt7603_dev * dev)40 mt7603_efuse_init(struct mt7603_dev *dev)
41 {
42 u32 base = mt7603_reg_map(dev, MT_EFUSE_BASE);
43 int len = MT7603_EEPROM_SIZE;
44 void *buf;
45 int ret, i;
46
47 if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY)
48 return 0;
49
50 dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL);
51 dev->mt76.otp.size = len;
52 if (!dev->mt76.otp.data)
53 return -ENOMEM;
54
55 buf = dev->mt76.otp.data;
56 for (i = 0; i + 16 <= len; i += 16) {
57 ret = mt7603_efuse_read(dev, base, i, buf + i);
58 if (ret)
59 return ret;
60 }
61
62 return 0;
63 }
64
65 static bool
mt7603_has_cal_free_data(struct mt7603_dev * dev,u8 * efuse)66 mt7603_has_cal_free_data(struct mt7603_dev *dev, u8 *efuse)
67 {
68 if (!efuse[MT_EE_TEMP_SENSOR_CAL])
69 return false;
70
71 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_0_START_2G) == 0)
72 return false;
73
74 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_1_START_2G) == 0)
75 return false;
76
77 if (!efuse[MT_EE_CP_FT_VERSION])
78 return false;
79
80 if (!efuse[MT_EE_XTAL_FREQ_OFFSET])
81 return false;
82
83 if (!efuse[MT_EE_XTAL_WF_RFCAL])
84 return false;
85
86 return true;
87 }
88
89 static void
mt7603_apply_cal_free_data(struct mt7603_dev * dev,u8 * efuse)90 mt7603_apply_cal_free_data(struct mt7603_dev *dev, u8 *efuse)
91 {
92 static const u8 cal_free_bytes[] = {
93 MT_EE_TEMP_SENSOR_CAL,
94 MT_EE_CP_FT_VERSION,
95 MT_EE_XTAL_FREQ_OFFSET,
96 MT_EE_XTAL_WF_RFCAL,
97 /* Skip for MT7628 */
98 MT_EE_TX_POWER_0_START_2G,
99 MT_EE_TX_POWER_0_START_2G + 1,
100 MT_EE_TX_POWER_1_START_2G,
101 MT_EE_TX_POWER_1_START_2G + 1,
102 };
103 u8 *eeprom = dev->mt76.eeprom.data;
104 int n = ARRAY_SIZE(cal_free_bytes);
105 int i;
106
107 if (!mt7603_has_cal_free_data(dev, efuse))
108 return;
109
110 if (is_mt7628(dev))
111 n -= 4;
112
113 for (i = 0; i < n; i++) {
114 int offset = cal_free_bytes[i];
115
116 eeprom[offset] = efuse[offset];
117 }
118 }
119
120 static int
mt7603_eeprom_load(struct mt7603_dev * dev)121 mt7603_eeprom_load(struct mt7603_dev *dev)
122 {
123 int ret;
124
125 ret = mt76_eeprom_init(&dev->mt76, MT7603_EEPROM_SIZE);
126 if (ret < 0)
127 return ret;
128
129 return mt7603_efuse_init(dev);
130 }
131
mt7603_check_eeprom(struct mt76_dev * dev)132 static int mt7603_check_eeprom(struct mt76_dev *dev)
133 {
134 u16 val = get_unaligned_le16(dev->eeprom.data);
135
136 switch (val) {
137 case 0x7628:
138 case 0x7603:
139 return 0;
140 default:
141 return -EINVAL;
142 }
143 }
144
mt7603_eeprom_init(struct mt7603_dev * dev)145 int mt7603_eeprom_init(struct mt7603_dev *dev)
146 {
147 int ret;
148
149 ret = mt7603_eeprom_load(dev);
150 if (ret < 0)
151 return ret;
152
153 if (dev->mt76.otp.data) {
154 if (mt7603_check_eeprom(&dev->mt76) == 0)
155 mt7603_apply_cal_free_data(dev, dev->mt76.otp.data);
156 else
157 memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data,
158 MT7603_EEPROM_SIZE);
159 }
160
161 dev->mt76.cap.has_2ghz = true;
162 memcpy(dev->mt76.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
163 ETH_ALEN);
164
165 mt76_eeprom_override(&dev->mt76);
166
167 return 0;
168 }
169
