drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c - pub/scm/linux/kernel/git/mraynal/linux - Git at Google

 /*
  * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
  * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
  * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2
  * as published by the Free Software Foundation
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/etherdevice.h>
 #include <asm/unaligned.h>
 #include "mt76x0.h"
 #include "eeprom.h"
 #include "../mt76x02_phy.h"

 #define MT_MAP_READS	DIV_ROUND_UP(MT_EFUSE_USAGE_MAP_SIZE, 16)
 static int
 mt76x0_efuse_physical_size_check(struct mt76x02_dev *dev)
 {
 	u8 data[MT_MAP_READS * 16];
 	int ret, i;
 	u32 start = 0, end = 0, cnt_free;

 	ret = mt76x02_get_efuse_data(dev, MT_EE_USAGE_MAP_START, data,
 				     sizeof(data), MT_EE_PHYSICAL_READ);
 	if (ret)
 		return ret;

 	for (i = 0; i < MT_EFUSE_USAGE_MAP_SIZE; i++)
 		if (!data[i]) {
 			if (!start)
 				start = MT_EE_USAGE_MAP_START + i;
 			end = MT_EE_USAGE_MAP_START + i;
 		}
 	cnt_free = end - start + 1;

 	if (MT_EFUSE_USAGE_MAP_SIZE - cnt_free < 5) {
 		dev_err(dev->mt76.dev,
 			"driver does not support default EEPROM\n");
 		return -EINVAL;
 	}

 	return 0;
 }

 static void mt76x0_set_chip_cap(struct mt76x02_dev *dev)
 {
 	u16 nic_conf0 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0);
 	u16 nic_conf1 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1);

 	mt76x02_eeprom_parse_hw_cap(dev);
 	dev_dbg(dev->mt76.dev, "2GHz %d 5GHz %d\n",
 		dev->mt76.cap.has_2ghz, dev->mt76.cap.has_5ghz);

 	if (dev->no_2ghz) {
 		dev->mt76.cap.has_2ghz = false;
 		dev_dbg(dev->mt76.dev, "mask out 2GHz support\n");
 	}

 	if (!mt76x02_field_valid(nic_conf1 & 0xff))
 		nic_conf1 &= 0xff00;

 	if (nic_conf1 & MT_EE_NIC_CONF_1_HW_RF_CTRL)
 		dev_err(dev->mt76.dev,
 			"driver does not support HW RF ctrl\n");

 	if (!mt76x02_field_valid(nic_conf0 >> 8))
 		return;

 	if (FIELD_GET(MT_EE_NIC_CONF_0_RX_PATH, nic_conf0) > 1 ||
 	    FIELD_GET(MT_EE_NIC_CONF_0_TX_PATH, nic_conf0) > 1)
 		dev_err(dev->mt76.dev, "invalid tx-rx stream\n");
 }

 static void mt76x0_set_temp_offset(struct mt76x02_dev *dev)
 {
 	u8 val;

 	val = mt76x02_eeprom_get(dev, MT_EE_2G_TARGET_POWER) >> 8;
 	if (mt76x02_field_valid(val))
 		dev->cal.rx.temp_offset = mt76x02_sign_extend(val, 8);
 	else
 		dev->cal.rx.temp_offset = -10;
 }

 static void mt76x0_set_freq_offset(struct mt76x02_dev *dev)
 {
 	struct mt76x02_rx_freq_cal *caldata = &dev->cal.rx;
 	u8 val;

 	val = mt76x02_eeprom_get(dev, MT_EE_FREQ_OFFSET);
 	if (!mt76x02_field_valid(val))
 		val = 0;
 	caldata->freq_offset = val;

 	val = mt76x02_eeprom_get(dev, MT_EE_TSSI_BOUND4) >> 8;
 	if (!mt76x02_field_valid(val))
 		val = 0;

 	caldata->freq_offset -= mt76x02_sign_extend(val, 8);
 }

 void mt76x0_read_rx_gain(struct mt76x02_dev *dev)
 {
 	struct ieee80211_channel *chan = dev->mt76.chandef.chan;
 	struct mt76x02_rx_freq_cal *caldata = &dev->cal.rx;
 	s8 val, lna_5g[3], lna_2g;
 	u16 rssi_offset;
 	int i;

 	mt76x02_get_rx_gain(dev, chan->band, &rssi_offset, &lna_2g, lna_5g);
 	caldata->lna_gain = mt76x02_get_lna_gain(dev, &lna_2g, lna_5g, chan);

 	for (i = 0; i < ARRAY_SIZE(caldata->rssi_offset); i++) {
 		val = rssi_offset >> (8 * i);
 		if (val < -10 || val > 10)
 			val = 0;

 		caldata->rssi_offset[i] = val;
 	}
 }

 static s8 mt76x0_get_delta(struct mt76x02_dev *dev)
 {
 	struct cfg80211_chan_def *chandef = &dev->mt76.chandef;
 	u8 val;

 	if (chandef->width == NL80211_CHAN_WIDTH_80) {
 		val = mt76x02_eeprom_get(dev, MT_EE_5G_TARGET_POWER) >> 8;
 	} else if (chandef->width == NL80211_CHAN_WIDTH_40) {
 		u16 data;

 		data = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_DELTA_BW40);
 		if (chandef->chan->band == NL80211_BAND_5GHZ)
 			val = data >> 8;
 		else
 			val = data;
 	} else {
 		return 0;
 	}

 	return mt76x02_rate_power_val(val);
 }

 void mt76x0_get_tx_power_per_rate(struct mt76x02_dev *dev,
 				  struct ieee80211_channel *chan,
 				  struct mt76_rate_power *t)
 {
 	bool is_2ghz = chan->band == NL80211_BAND_2GHZ;
 	u16 val, addr;
 	s8 delta;

 	memset(t, 0, sizeof(*t));

 	/* cck 1M, 2M, 5.5M, 11M */
 	val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_BYRATE_BASE);
 	t->cck[0] = t->cck[1] = s6_to_s8(val);
 	t->cck[2] = t->cck[3] = s6_to_s8(val >> 8);

 	/* ofdm 6M, 9M, 12M, 18M */
 	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 2 : 0x120;
 	val = mt76x02_eeprom_get(dev, addr);
 	t->ofdm[0] = t->ofdm[1] = s6_to_s8(val);
 	t->ofdm[2] = t->ofdm[3] = s6_to_s8(val >> 8);

 	/* ofdm 24M, 36M, 48M, 54M */
 	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 4 : 0x122;
 	val = mt76x02_eeprom_get(dev, addr);
 	t->ofdm[4] = t->ofdm[5] = s6_to_s8(val);
 	t->ofdm[6] = t->ofdm[7] = s6_to_s8(val >> 8);

 	/* ht-vht mcs 1ss 0, 1, 2, 3 */
 	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 6 : 0x124;
 	val = mt76x02_eeprom_get(dev, addr);
 	t->ht[0] = t->ht[1] = t->vht[0] = t->vht[1] = s6_to_s8(val);
 	t->ht[2] = t->ht[3] = t->vht[2] = t->vht[3] = s6_to_s8(val >> 8);

 	/* ht-vht mcs 1ss 4, 5, 6 */
 	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 8 : 0x126;
 	val = mt76x02_eeprom_get(dev, addr);
 	t->ht[4] = t->ht[5] = t->vht[4] = t->vht[5] = s6_to_s8(val);
 	t->ht[6] = t->ht[7] = t->vht[6] = t->vht[7] = s6_to_s8(val >> 8);

 	/* ht-vht mcs 1ss 0, 1, 2, 3 stbc */
 	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 14 : 0xec;
 	val = mt76x02_eeprom_get(dev, addr);
 	t->stbc[0] = t->stbc[1] = s6_to_s8(val);
 	t->stbc[2] = t->stbc[3] = s6_to_s8(val >> 8);

 	/* ht-vht mcs 1ss 4, 5, 6 stbc */
 	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 16 : 0xee;
 	val = mt76x02_eeprom_get(dev, addr);
 	t->stbc[4] = t->stbc[5] = s6_to_s8(val);
 	t->stbc[6] = t->stbc[7] = s6_to_s8(val >> 8);

 	/* vht mcs 8, 9 5GHz */
 	val = mt76x02_eeprom_get(dev, 0x132);
 	t->vht[8] = s6_to_s8(val);
 	t->vht[9] = s6_to_s8(val >> 8);

 	delta = mt76x0_tssi_enabled(dev) ? 0 : mt76x0_get_delta(dev);
 	mt76x02_add_rate_power_offset(t, delta);
 }

 void mt76x0_get_power_info(struct mt76x02_dev *dev,
 			   struct ieee80211_channel *chan, s8 *tp)
 {
 	struct mt76x0_chan_map {
 		u8 chan;
 		u8 offset;
 	} chan_map[] = {
 		{   2,  0 }, {   4,  2 }, {   6,  4 }, {   8,  6 },
 		{  10,  8 }, {  12, 10 }, {  14, 12 }, {  38,  0 },
 		{  44,  2 }, {  48,  4 }, {  54,  6 }, {  60,  8 },
 		{  64, 10 }, { 102, 12 }, { 108, 14 }, { 112, 16 },
 		{ 118, 18 }, { 124, 20 }, { 128, 22 }, { 134, 24 },
 		{ 140, 26 }, { 151, 28 }, { 157, 30 }, { 161, 32 },
 		{ 167, 34 }, { 171, 36 }, { 175, 38 },
 	};
 	u8 offset, addr;
 	int i, idx = 0;
 	u16 data;

 	if (mt76x0_tssi_enabled(dev)) {
 		s8 target_power;

 		if (chan->band == NL80211_BAND_5GHZ)
 			data = mt76x02_eeprom_get(dev, MT_EE_5G_TARGET_POWER);
 		else
 			data = mt76x02_eeprom_get(dev, MT_EE_2G_TARGET_POWER);
 		target_power = (data & 0xff) - dev->mt76.rate_power.ofdm[7];
 		*tp = target_power + mt76x0_get_delta(dev);

 		return;
 	}

 	for (i = 0; i < ARRAY_SIZE(chan_map); i++) {
 		if (chan->hw_value <= chan_map[i].chan) {
 			idx = (chan->hw_value == chan_map[i].chan);
 			offset = chan_map[i].offset;
 			break;
 		}
 	}
 	if (i == ARRAY_SIZE(chan_map))
 		offset = chan_map[0].offset;

 	if (chan->band == NL80211_BAND_2GHZ) {
 		addr = MT_EE_TX_POWER_DELTA_BW80 + offset;
 	} else {
 		switch (chan->hw_value) {
 		case 42:
 			offset = 2;
 			break;
 		case 58:
 			offset = 8;
 			break;
 		case 106:
 			offset = 14;
 			break;
 		case 122:
 			offset = 20;
 			break;
 		case 155:
 			offset = 30;
 			break;
 		default:
 			break;
 		}
 		addr = MT_EE_TX_POWER_0_GRP4_TSSI_SLOPE + 2 + offset;
 	}

 	data = mt76x02_eeprom_get(dev, addr);
 	*tp = data >> (8 * idx);
 	if (*tp < 0 || *tp > 0x3f)
 		*tp = 5;
 }

 static int mt76x0_check_eeprom(struct mt76x02_dev *dev)
 {
 	u16 val;

 	val = get_unaligned_le16(dev->mt76.eeprom.data);
 	if (!val)
 		val = get_unaligned_le16(dev->mt76.eeprom.data +
 					 MT_EE_PCI_ID);

 	switch (val) {
 	case 0x7650:
 	case 0x7610:
 		return 0;
 	default:
 		dev_err(dev->mt76.dev, "EEPROM data check failed: %04x\n",
 			val);
 		return -EINVAL;
 	}
 }

 static int mt76x0_load_eeprom(struct mt76x02_dev *dev)
 {
 	int found;

 	found = mt76_eeprom_init(&dev->mt76, MT76X0_EEPROM_SIZE);
 	if (found < 0)
 		return found;

 	if (found && !mt76x0_check_eeprom(dev))
 		return 0;

 	found = mt76x0_efuse_physical_size_check(dev);
 	if (found < 0)
 		return found;

 	return mt76x02_get_efuse_data(dev, 0, dev->mt76.eeprom.data,
 				      MT76X0_EEPROM_SIZE, MT_EE_READ);
 }

 int mt76x0_eeprom_init(struct mt76x02_dev *dev)
 {
 	u8 version, fae;
 	u16 data;
 	int err;

 	err = mt76x0_load_eeprom(dev);
 	if (err < 0)
 		return err;

 	data = mt76x02_eeprom_get(dev, MT_EE_VERSION);
 	version = data >> 8;
 	fae = data;

 	if (version > MT76X0U_EE_MAX_VER)
 		dev_warn(dev->mt76.dev,
 			 "Warning: unsupported EEPROM version %02hhx\n",
 			 version);
 	dev_info(dev->mt76.dev, "EEPROM ver:%02hhx fae:%02hhx\n",
 		 version, fae);

 	mt76x02_mac_setaddr(dev, dev->mt76.eeprom.data + MT_EE_MAC_ADDR);
 	mt76x0_set_chip_cap(dev);
 	mt76x0_set_freq_offset(dev);
 	mt76x0_set_temp_offset(dev);

 	return 0;
 }

 MODULE_LICENSE("Dual BSD/GPL");
	/*
	* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
	* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
	* Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2
	* as published by the Free Software Foundation
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/mtd/mtd.h>
	#include <linux/mtd/partitions.h>
	#include <linux/etherdevice.h>
	#include <asm/unaligned.h>
	#include "mt76x0.h"
	#include "eeprom.h"
	#include "../mt76x02_phy.h"

	#define MT_MAP_READS DIV_ROUND_UP(MT_EFUSE_USAGE_MAP_SIZE, 16)
	static int
	mt76x0_efuse_physical_size_check(struct mt76x02_dev *dev)
	{
	u8 data[MT_MAP_READS * 16];
	int ret, i;
	u32 start = 0, end = 0, cnt_free;

	ret = mt76x02_get_efuse_data(dev, MT_EE_USAGE_MAP_START, data,
	sizeof(data), MT_EE_PHYSICAL_READ);
	if (ret)
	return ret;

	for (i = 0; i < MT_EFUSE_USAGE_MAP_SIZE; i++)
	if (!data[i]) {
	if (!start)
	start = MT_EE_USAGE_MAP_START + i;
	end = MT_EE_USAGE_MAP_START + i;
	}
	cnt_free = end - start + 1;

	if (MT_EFUSE_USAGE_MAP_SIZE - cnt_free < 5) {
	dev_err(dev->mt76.dev,
	"driver does not support default EEPROM\n");
	return -EINVAL;
	}

	return 0;
	}

	static void mt76x0_set_chip_cap(struct mt76x02_dev *dev)
	{
	u16 nic_conf0 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0);
	u16 nic_conf1 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1);

	mt76x02_eeprom_parse_hw_cap(dev);
	dev_dbg(dev->mt76.dev, "2GHz %d 5GHz %d\n",
	dev->mt76.cap.has_2ghz, dev->mt76.cap.has_5ghz);

	if (dev->no_2ghz) {
	dev->mt76.cap.has_2ghz = false;
	dev_dbg(dev->mt76.dev, "mask out 2GHz support\n");
	}

	if (!mt76x02_field_valid(nic_conf1 & 0xff))
	nic_conf1 &= 0xff00;

	if (nic_conf1 & MT_EE_NIC_CONF_1_HW_RF_CTRL)
	dev_err(dev->mt76.dev,
	"driver does not support HW RF ctrl\n");

	if (!mt76x02_field_valid(nic_conf0 >> 8))
	return;

	if (FIELD_GET(MT_EE_NIC_CONF_0_RX_PATH, nic_conf0) > 1 \|\|
	FIELD_GET(MT_EE_NIC_CONF_0_TX_PATH, nic_conf0) > 1)
	dev_err(dev->mt76.dev, "invalid tx-rx stream\n");
	}

	static void mt76x0_set_temp_offset(struct mt76x02_dev *dev)
	{
	u8 val;

	val = mt76x02_eeprom_get(dev, MT_EE_2G_TARGET_POWER) >> 8;
	if (mt76x02_field_valid(val))
	dev->cal.rx.temp_offset = mt76x02_sign_extend(val, 8);
	else
	dev->cal.rx.temp_offset = -10;
	}

	static void mt76x0_set_freq_offset(struct mt76x02_dev *dev)
	{
	struct mt76x02_rx_freq_cal *caldata = &dev->cal.rx;
	u8 val;

	val = mt76x02_eeprom_get(dev, MT_EE_FREQ_OFFSET);
	if (!mt76x02_field_valid(val))
	val = 0;
	caldata->freq_offset = val;

	val = mt76x02_eeprom_get(dev, MT_EE_TSSI_BOUND4) >> 8;
	if (!mt76x02_field_valid(val))
	val = 0;

	caldata->freq_offset -= mt76x02_sign_extend(val, 8);
	}

	void mt76x0_read_rx_gain(struct mt76x02_dev *dev)
	{
	struct ieee80211_channel *chan = dev->mt76.chandef.chan;
	struct mt76x02_rx_freq_cal *caldata = &dev->cal.rx;
	s8 val, lna_5g[3], lna_2g;
	u16 rssi_offset;
	int i;

	mt76x02_get_rx_gain(dev, chan->band, &rssi_offset, &lna_2g, lna_5g);
	caldata->lna_gain = mt76x02_get_lna_gain(dev, &lna_2g, lna_5g, chan);

	for (i = 0; i < ARRAY_SIZE(caldata->rssi_offset); i++) {
	val = rssi_offset >> (8 * i);
	if (val < -10 \|\| val > 10)
	val = 0;

	caldata->rssi_offset[i] = val;
	}
	}

	static s8 mt76x0_get_delta(struct mt76x02_dev *dev)
	{
	struct cfg80211_chan_def *chandef = &dev->mt76.chandef;
	u8 val;

	if (chandef->width == NL80211_CHAN_WIDTH_80) {
	val = mt76x02_eeprom_get(dev, MT_EE_5G_TARGET_POWER) >> 8;
	} else if (chandef->width == NL80211_CHAN_WIDTH_40) {
	u16 data;

	data = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_DELTA_BW40);
	if (chandef->chan->band == NL80211_BAND_5GHZ)
	val = data >> 8;
	else
	val = data;
	} else {
	return 0;
	}

	return mt76x02_rate_power_val(val);
	}

	void mt76x0_get_tx_power_per_rate(struct mt76x02_dev *dev,
	struct ieee80211_channel *chan,
	struct mt76_rate_power *t)
	{
	bool is_2ghz = chan->band == NL80211_BAND_2GHZ;
	u16 val, addr;
	s8 delta;

	memset(t, 0, sizeof(*t));

	/* cck 1M, 2M, 5.5M, 11M */
	val = mt76x02_eeprom_get(dev, MT_EE_TX_POWER_BYRATE_BASE);
	t->cck[0] = t->cck[1] = s6_to_s8(val);
	t->cck[2] = t->cck[3] = s6_to_s8(val >> 8);

	/* ofdm 6M, 9M, 12M, 18M */
	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 2 : 0x120;
	val = mt76x02_eeprom_get(dev, addr);
	t->ofdm[0] = t->ofdm[1] = s6_to_s8(val);
	t->ofdm[2] = t->ofdm[3] = s6_to_s8(val >> 8);

	/* ofdm 24M, 36M, 48M, 54M */
	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 4 : 0x122;
	val = mt76x02_eeprom_get(dev, addr);
	t->ofdm[4] = t->ofdm[5] = s6_to_s8(val);
	t->ofdm[6] = t->ofdm[7] = s6_to_s8(val >> 8);

	/* ht-vht mcs 1ss 0, 1, 2, 3 */
	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 6 : 0x124;
	val = mt76x02_eeprom_get(dev, addr);
	t->ht[0] = t->ht[1] = t->vht[0] = t->vht[1] = s6_to_s8(val);
	t->ht[2] = t->ht[3] = t->vht[2] = t->vht[3] = s6_to_s8(val >> 8);

	/* ht-vht mcs 1ss 4, 5, 6 */
	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 8 : 0x126;
	val = mt76x02_eeprom_get(dev, addr);
	t->ht[4] = t->ht[5] = t->vht[4] = t->vht[5] = s6_to_s8(val);
	t->ht[6] = t->ht[7] = t->vht[6] = t->vht[7] = s6_to_s8(val >> 8);

	/* ht-vht mcs 1ss 0, 1, 2, 3 stbc */
	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 14 : 0xec;
	val = mt76x02_eeprom_get(dev, addr);
	t->stbc[0] = t->stbc[1] = s6_to_s8(val);
	t->stbc[2] = t->stbc[3] = s6_to_s8(val >> 8);

	/* ht-vht mcs 1ss 4, 5, 6 stbc */
	addr = is_2ghz ? MT_EE_TX_POWER_BYRATE_BASE + 16 : 0xee;
	val = mt76x02_eeprom_get(dev, addr);
	t->stbc[4] = t->stbc[5] = s6_to_s8(val);
	t->stbc[6] = t->stbc[7] = s6_to_s8(val >> 8);

	/* vht mcs 8, 9 5GHz */
	val = mt76x02_eeprom_get(dev, 0x132);
	t->vht[8] = s6_to_s8(val);
	t->vht[9] = s6_to_s8(val >> 8);

	delta = mt76x0_tssi_enabled(dev) ? 0 : mt76x0_get_delta(dev);
	mt76x02_add_rate_power_offset(t, delta);
	}

	void mt76x0_get_power_info(struct mt76x02_dev *dev,
	struct ieee80211_channel chan, s8 tp)
	{
	struct mt76x0_chan_map {
	u8 chan;
	u8 offset;
	} chan_map[] = {
	{ 2, 0 }, { 4, 2 }, { 6, 4 }, { 8, 6 },
	{ 10, 8 }, { 12, 10 }, { 14, 12 }, { 38, 0 },
	{ 44, 2 }, { 48, 4 }, { 54, 6 }, { 60, 8 },
	{ 64, 10 }, { 102, 12 }, { 108, 14 }, { 112, 16 },
	{ 118, 18 }, { 124, 20 }, { 128, 22 }, { 134, 24 },
	{ 140, 26 }, { 151, 28 }, { 157, 30 }, { 161, 32 },
	{ 167, 34 }, { 171, 36 }, { 175, 38 },
	};
	u8 offset, addr;
	int i, idx = 0;
	u16 data;

	if (mt76x0_tssi_enabled(dev)) {
	s8 target_power;

	if (chan->band == NL80211_BAND_5GHZ)
	data = mt76x02_eeprom_get(dev, MT_EE_5G_TARGET_POWER);
	else
	data = mt76x02_eeprom_get(dev, MT_EE_2G_TARGET_POWER);
	target_power = (data & 0xff) - dev->mt76.rate_power.ofdm[7];
	*tp = target_power + mt76x0_get_delta(dev);

	return;
	}

	for (i = 0; i < ARRAY_SIZE(chan_map); i++) {
	if (chan->hw_value <= chan_map[i].chan) {
	idx = (chan->hw_value == chan_map[i].chan);
	offset = chan_map[i].offset;
	break;
	}
	}
	if (i == ARRAY_SIZE(chan_map))
	offset = chan_map[0].offset;

	if (chan->band == NL80211_BAND_2GHZ) {
	addr = MT_EE_TX_POWER_DELTA_BW80 + offset;
	} else {
	switch (chan->hw_value) {
	case 42:
	offset = 2;
	break;
	case 58:
	offset = 8;
	break;
	case 106:
	offset = 14;
	break;
	case 122:
	offset = 20;
	break;
	case 155:
	offset = 30;
	break;
	default:
	break;
	}
	addr = MT_EE_TX_POWER_0_GRP4_TSSI_SLOPE + 2 + offset;
	}

	data = mt76x02_eeprom_get(dev, addr);
	tp = data >> (8 idx);
	if (tp < 0 \|\| tp > 0x3f)
	*tp = 5;
	}

	static int mt76x0_check_eeprom(struct mt76x02_dev *dev)
	{
	u16 val;

	val = get_unaligned_le16(dev->mt76.eeprom.data);
	if (!val)
	val = get_unaligned_le16(dev->mt76.eeprom.data +
	MT_EE_PCI_ID);

	switch (val) {
	case 0x7650:
	case 0x7610:
	return 0;
	default:
	dev_err(dev->mt76.dev, "EEPROM data check failed: %04x\n",
	val);
	return -EINVAL;
	}
	}

	static int mt76x0_load_eeprom(struct mt76x02_dev *dev)
	{
	int found;

	found = mt76_eeprom_init(&dev->mt76, MT76X0_EEPROM_SIZE);
	if (found < 0)
	return found;

	if (found && !mt76x0_check_eeprom(dev))
	return 0;

	found = mt76x0_efuse_physical_size_check(dev);
	if (found < 0)
	return found;

	return mt76x02_get_efuse_data(dev, 0, dev->mt76.eeprom.data,
	MT76X0_EEPROM_SIZE, MT_EE_READ);
	}

	int mt76x0_eeprom_init(struct mt76x02_dev *dev)
	{
	u8 version, fae;
	u16 data;
	int err;

	err = mt76x0_load_eeprom(dev);
	if (err < 0)
	return err;

	data = mt76x02_eeprom_get(dev, MT_EE_VERSION);
	version = data >> 8;
	fae = data;

	if (version > MT76X0U_EE_MAX_VER)
	dev_warn(dev->mt76.dev,
	"Warning: unsupported EEPROM version %02hhx\n",
	version);
	dev_info(dev->mt76.dev, "EEPROM ver:%02hhx fae:%02hhx\n",
	version, fae);

	mt76x02_mac_setaddr(dev, dev->mt76.eeprom.data + MT_EE_MAC_ADDR);
	mt76x0_set_chip_cap(dev);
	mt76x0_set_freq_offset(dev);
	mt76x0_set_temp_offset(dev);

	return 0;
	}

	MODULE_LICENSE("Dual BSD/GPL");