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
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 
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 
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 
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 
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 
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 
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