1
2
3#include <linux/of.h>
4#include "mt7603.h"
5#include "eeprom.h"
6
7static int
8mt7603_efuse_read(struct mt7603_dev *dev, u32 base, u16 addr, u8 *data)
9{
10 u32 val;
11 int i;
12
13 val = mt76_rr(dev, base + MT_EFUSE_CTRL);
14 val &= ~(MT_EFUSE_CTRL_AIN |
15 MT_EFUSE_CTRL_MODE);
16 val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf);
17 val |= MT_EFUSE_CTRL_KICK;
18 mt76_wr(dev, base + MT_EFUSE_CTRL, val);
19
20 if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000))
21 return -ETIMEDOUT;
22
23 udelay(2);
24
25 val = mt76_rr(dev, base + MT_EFUSE_CTRL);
26 if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT ||
27 WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) {
28 memset(data, 0xff, 16);
29 return 0;
30 }
31
32 for (i = 0; i < 4; i++) {
33 val = mt76_rr(dev, base + MT_EFUSE_RDATA(i));
34 put_unaligned_le32(val, data + 4 * i);
35 }
36
37 return 0;
38}
39
40static int
41mt7603_efuse_init(struct mt7603_dev *dev)
42{
43 u32 base = mt7603_reg_map(dev, MT_EFUSE_BASE);
44 int len = MT7603_EEPROM_SIZE;
45 void *buf;
46 int ret, i;
47
48 if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY)
49 return 0;
50
51 dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL);
52 dev->mt76.otp.size = len;
53 if (!dev->mt76.otp.data)
54 return -ENOMEM;
55
56 buf = dev->mt76.otp.data;
57 for (i = 0; i + 16 <= len; i += 16) {
58 ret = mt7603_efuse_read(dev, base, i, buf + i);
59 if (ret)
60 return ret;
61 }
62
63 return 0;
64}
65
66static bool
67mt7603_has_cal_free_data(struct mt7603_dev *dev, u8 *efuse)
68{
69 if (!efuse[MT_EE_TEMP_SENSOR_CAL])
70 return false;
71
72 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_0_START_2G) == 0)
73 return false;
74
75 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_1_START_2G) == 0)
76 return false;
77
78 if (!efuse[MT_EE_CP_FT_VERSION])
79 return false;
80
81 if (!efuse[MT_EE_XTAL_FREQ_OFFSET])
82 return false;
83
84 if (!efuse[MT_EE_XTAL_WF_RFCAL])
85 return false;
86
87 return true;
88}
89
90static void
91mt7603_apply_cal_free_data(struct mt7603_dev *dev, u8 *efuse)
92{
93 static const u8 cal_free_bytes[] = {
94 MT_EE_TEMP_SENSOR_CAL,
95 MT_EE_CP_FT_VERSION,
96 MT_EE_XTAL_FREQ_OFFSET,
97 MT_EE_XTAL_WF_RFCAL,
98
99 MT_EE_TX_POWER_0_START_2G,
100 MT_EE_TX_POWER_0_START_2G + 1,
101 MT_EE_TX_POWER_1_START_2G,
102 MT_EE_TX_POWER_1_START_2G + 1,
103 };
104 struct device_node *np = dev->mt76.dev->of_node;
105 u8 *eeprom = dev->mt76.eeprom.data;
106 int n = ARRAY_SIZE(cal_free_bytes);
107 int i;
108
109 if (!np || !of_property_read_bool(np, "mediatek,eeprom-merge-otp"))
110 return;
111
112 if (!mt7603_has_cal_free_data(dev, efuse))
113 return;
114
115 if (is_mt7628(dev))
116 n -= 4;
117
118 for (i = 0; i < n; i++) {
119 int offset = cal_free_bytes[i];
120
121 eeprom[offset] = efuse[offset];
122 }
123}
124
125static int
126mt7603_eeprom_load(struct mt7603_dev *dev)
127{
128 int ret;
129
130 ret = mt76_eeprom_init(&dev->mt76, MT7603_EEPROM_SIZE);
131 if (ret < 0)
132 return ret;
133
134 return mt7603_efuse_init(dev);
135}
136
137static int mt7603_check_eeprom(struct mt76_dev *dev)
138{
139 u16 val = get_unaligned_le16(dev->eeprom.data);
140
141 switch (val) {
142 case 0x7628:
143 case 0x7603:
144 case 0x7600:
145 return 0;
146 default:
147 return -EINVAL;
148 }
149}
150
151static inline bool is_mt7688(struct mt7603_dev *dev)
152{
153 return mt76_rr(dev, MT_EFUSE_BASE + 0x64) & BIT(4);
154}
155
156int mt7603_eeprom_init(struct mt7603_dev *dev)
157{
158 u8 *eeprom;
159 int ret;
160
161 ret = mt7603_eeprom_load(dev);
162 if (ret < 0)
163 return ret;
164
165 if (dev->mt76.otp.data) {
166 if (mt7603_check_eeprom(&dev->mt76) == 0)
167 mt7603_apply_cal_free_data(dev, dev->mt76.otp.data);
168 else
169 memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data,
170 MT7603_EEPROM_SIZE);
171 }
172
173 eeprom = (u8 *)dev->mt76.eeprom.data;
174 dev->mphy.cap.has_2ghz = true;
175 memcpy(dev->mphy.macaddr, eeprom + MT_EE_MAC_ADDR, ETH_ALEN);
176
177
178 dev->mphy.antenna_mask = 3;
179 if (FIELD_GET(MT_EE_NIC_CONF_0_RX_PATH, eeprom[MT_EE_NIC_CONF_0]) == 1 ||
180 FIELD_GET(MT_EE_NIC_CONF_0_TX_PATH, eeprom[MT_EE_NIC_CONF_0]) == 1 ||
181 is_mt7688(dev))
182 dev->mphy.antenna_mask = 1;
183
184 mt76_eeprom_override(&dev->mphy);
185
186 return 0;
187}
188
