1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
5 */
6
7 #include <asm/unaligned.h>
8
9 #include "mt76x02_eeprom.h"
10
11 static int
mt76x02_efuse_read(struct mt76x02_dev * dev,u16 addr,u8 * data,enum mt76x02_eeprom_modes mode)12 mt76x02_efuse_read(struct mt76x02_dev *dev, u16 addr, u8 *data,
13 enum mt76x02_eeprom_modes mode)
14 {
15 u32 val;
16 int i;
17
18 val = mt76_rr(dev, MT_EFUSE_CTRL);
19 val &= ~(MT_EFUSE_CTRL_AIN |
20 MT_EFUSE_CTRL_MODE);
21 val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf);
22 val |= FIELD_PREP(MT_EFUSE_CTRL_MODE, mode);
23 val |= MT_EFUSE_CTRL_KICK;
24 mt76_wr(dev, MT_EFUSE_CTRL, val);
25
26 if (!mt76_poll_msec(dev, MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000))
27 return -ETIMEDOUT;
28
29 udelay(2);
30
31 val = mt76_rr(dev, MT_EFUSE_CTRL);
32 if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT) {
33 memset(data, 0xff, 16);
34 return 0;
35 }
36
37 for (i = 0; i < 4; i++) {
38 val = mt76_rr(dev, MT_EFUSE_DATA(i));
39 put_unaligned_le32(val, data + 4 * i);
40 }
41
42 return 0;
43 }
44
mt76x02_eeprom_copy(struct mt76x02_dev * dev,enum mt76x02_eeprom_field field,void * dest,int len)45 int mt76x02_eeprom_copy(struct mt76x02_dev *dev,
46 enum mt76x02_eeprom_field field,
47 void *dest, int len)
48 {
49 if (field + len > dev->mt76.eeprom.size)
50 return -1;
51
52 memcpy(dest, dev->mt76.eeprom.data + field, len);
53 return 0;
54 }
55 EXPORT_SYMBOL_GPL(mt76x02_eeprom_copy);
56
mt76x02_get_efuse_data(struct mt76x02_dev * dev,u16 base,void * buf,int len,enum mt76x02_eeprom_modes mode)57 int mt76x02_get_efuse_data(struct mt76x02_dev *dev, u16 base, void *buf,
58 int len, enum mt76x02_eeprom_modes mode)
59 {
60 int ret, i;
61
62 for (i = 0; i + 16 <= len; i += 16) {
63 ret = mt76x02_efuse_read(dev, base + i, buf + i, mode);
64 if (ret)
65 return ret;
66 }
67
68 return 0;
69 }
70 EXPORT_SYMBOL_GPL(mt76x02_get_efuse_data);
71
mt76x02_eeprom_parse_hw_cap(struct mt76x02_dev * dev)72 void mt76x02_eeprom_parse_hw_cap(struct mt76x02_dev *dev)
73 {
74 u16 val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0);
75
76 switch (FIELD_GET(MT_EE_NIC_CONF_0_BOARD_TYPE, val)) {
77 case BOARD_TYPE_5GHZ:
78 dev->mphy.cap.has_5ghz = true;
79 break;
80 case BOARD_TYPE_2GHZ:
81 dev->mphy.cap.has_2ghz = true;
82 break;
83 default:
84 dev->mphy.cap.has_2ghz = true;
85 dev->mphy.cap.has_5ghz = true;
86 break;
87 }
88 }
89 EXPORT_SYMBOL_GPL(mt76x02_eeprom_parse_hw_cap);
90
mt76x02_ext_pa_enabled(struct mt76x02_dev * dev,enum nl80211_band band)91 bool mt76x02_ext_pa_enabled(struct mt76x02_dev *dev, enum nl80211_band band)
92 {
93 u16 conf0 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0);
94
95 if (band == NL80211_BAND_5GHZ)
96 return !(conf0 & MT_EE_NIC_CONF_0_PA_INT_5G);
97 else
98 return !(conf0 & MT_EE_NIC_CONF_0_PA_INT_2G);
99 }
100 EXPORT_SYMBOL_GPL(mt76x02_ext_pa_enabled);
101
mt76x02_get_rx_gain(struct mt76x02_dev * dev,enum nl80211_band band,u16 * rssi_offset,s8 * lna_2g,s8 * lna_5g)102 void mt76x02_get_rx_gain(struct mt76x02_dev *dev, enum nl80211_band band,
103 u16 *rssi_offset, s8 *lna_2g, s8 *lna_5g)
104 {
105 u16 val;
106
107 val = mt76x02_eeprom_get(dev, MT_EE_LNA_GAIN);
108 *lna_2g = val & 0xff;
109 lna_5g[0] = val >> 8;
110
111 val = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_2G_1);
112 lna_5g[1] = val >> 8;
113
114 val = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_5G_1);
115 lna_5g[2] = val >> 8;
116
117 if (!mt76x02_field_valid(lna_5g[1]))
118 lna_5g[1] = lna_5g[0];
119
120 if (!mt76x02_field_valid(lna_5g[2]))
121 lna_5g[2] = lna_5g[0];
122
123 if (band == NL80211_BAND_2GHZ)
124 *rssi_offset = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_2G_0);
125 else
126 *rssi_offset = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_5G_0);
127 }
128 EXPORT_SYMBOL_GPL(mt76x02_get_rx_gain);
129
mt76x02_get_lna_gain(struct mt76x02_dev * dev,s8 * lna_2g,s8 * lna_5g,struct ieee80211_channel * chan)130 u8 mt76x02_get_lna_gain(struct mt76x02_dev *dev,
131 s8 *lna_2g, s8 *lna_5g,
132 struct ieee80211_channel *chan)
133 {
134 u16 val;
135 u8 lna;
136
137 val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1);
138 if (val & MT_EE_NIC_CONF_1_LNA_EXT_2G)
139 *lna_2g = 0;
140 if (val & MT_EE_NIC_CONF_1_LNA_EXT_5G)
141 memset(lna_5g, 0, sizeof(s8) * 3);
142
143 if (chan->band == NL80211_BAND_2GHZ)
144 lna = *lna_2g;
145 else if (chan->hw_value <= 64)
146 lna = lna_5g[0];
147 else if (chan->hw_value <= 128)
148 lna = lna_5g[1];
149 else
150 lna = lna_5g[2];
151
152 return lna != 0xff ? lna : 0;
153 }
154 EXPORT_SYMBOL_GPL(mt76x02_get_lna_gain);
155