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);