148 lines · c
1// SPDX-License-Identifier: ISC2/*3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>4 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>5 */6 7#include <linux/unaligned.h>8 9#include "mt76x02_eeprom.h"10 11static int12mt76x02_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 else98 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 else126 *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 else143 lna = lna_5g[2];144 145 return lna != 0xff ? lna : 0;146}147EXPORT_SYMBOL_GPL(mt76x02_get_lna_gain);148