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
11static int
12mt76x02_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
45int 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}
55EXPORT_SYMBOL_GPL(mt76x02_eeprom_copy);
56
57int 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}
70EXPORT_SYMBOL_GPL(mt76x02_get_efuse_data);
71
72void 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}
89EXPORT_SYMBOL_GPL(mt76x02_eeprom_parse_hw_cap);
90
91bool 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}
100EXPORT_SYMBOL_GPL(mt76x02_ext_pa_enabled);
101
102void 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}
128EXPORT_SYMBOL_GPL(mt76x02_get_rx_gain);
129
130u8 mt76x02_get_lna_gain(struct mt76x02_dev *dev,
131			s8 *lna_2g, s8 *lna_5g,
132			struct ieee80211_channel *chan)
133{
134	u8 lna;
135
136	if (chan->band == NL80211_BAND_2GHZ)
137		lna = *lna_2g;
138	else if (chan->hw_value <= 64)
139		lna = lna_5g[0];
140	else if (chan->hw_value <= 128)
141		lna = lna_5g[1];
142	else
143		lna = lna_5g[2];
144
145	return lna != 0xff ? lna : 0;
146}
147EXPORT_SYMBOL_GPL(mt76x02_get_lna_gain);
148