eeprom.h

/*
 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
 *
 * 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.
 */

#ifndef __MT76_EEPROM_H
#define __MT76_EEPROM_H

#include "mt76.h"

enum mt76_eeprom_field {
	MT_EE_CHIP_ID =				0x000,
	MT_EE_VERSION =				0x002,
	MT_EE_MAC_ADDR =			0x004,
	MT_EE_NIC_CONF_0 =			0x034,
	MT_EE_NIC_CONF_1 =			0x036,
	MT_EE_NIC_CONF_2 =			0x042,

	MT_EE_XTAL_TRIM_1 =			0x03a,
	MT_EE_XTAL_TRIM_2 =			0x09e,

	MT_EE_LNA_GAIN =			0x044,
	MT_EE_RSSI_OFFSET_2G_0 =		0x046,
	MT_EE_RSSI_OFFSET_2G_1 =		0x048,
	MT_EE_RSSI_OFFSET_5G_0 =		0x04a,
	MT_EE_RSSI_OFFSET_5G_1 =		0x04c,

	MT_EE_TX_POWER_DELTA_BW40 =		0x050,
	MT_EE_TX_POWER_DELTA_BW80 =		0x052,

	MT_EE_TX_POWER_EXT_PA_5G =		0x054,

	MT_EE_TX_POWER_0_START_2G =		0x056,
	MT_EE_TX_POWER_1_START_2G =		0x05c,

	/* used as byte arrays */
#define MT_TX_POWER_GROUP_SIZE_5G		5
#define MT_TX_POWER_GROUPS_5G			6
	MT_EE_TX_POWER_0_START_5G =		0x062,
	MT_EE_TX_POWER_1_START_5G =		0x080,


	MT_EE_TX_POWER_CCK =			0x0a0,
	MT_EE_TX_POWER_OFDM_2G_6M =		0x0a2,
	MT_EE_TX_POWER_OFDM_2G_24M =		0x0a4,
	MT_EE_TX_POWER_OFDM_5G_6M =		0x0b2,
	MT_EE_TX_POWER_OFDM_5G_24M =		0x0b4,
	MT_EE_TX_POWER_HT_MCS0 =		0x0a6,
	MT_EE_TX_POWER_HT_MCS4 =		0x0a8,
	MT_EE_TX_POWER_HT_MCS8 =		0x0aa,
	MT_EE_TX_POWER_HT_MCS12 =		0x0ac,
	MT_EE_TX_POWER_VHT_MCS0 =		0x0ba,
	MT_EE_TX_POWER_VHT_MCS4 =		0x0bc,
	MT_EE_TX_POWER_VHT_MCS8 =		0x0be,

	MT_EE_RF_TEMP_COMP_SLOPE_5G =		0x0f2,
	MT_EE_RF_TEMP_COMP_SLOPE_2G =		0x0f4,

	MT_EE_RF_2G_TSSI_OFF_TXPOWER =		0x0f6,
	MT_EE_RF_2G_RX_HIGH_GAIN =		0x0f8,
	MT_EE_RF_5G_GRP0_1_RX_HIGH_GAIN =	0x0fa,
	MT_EE_RF_5G_GRP2_3_RX_HIGH_GAIN =	0x0fc,
	MT_EE_RF_5G_GRP4_5_RX_HIGH_GAIN =	0x0fe,

	MT_EE_BT_RCAL_RESULT =			0x138,

	__MT_EE_MAX
};

#define MT_EE_NIC_CONF_0_PA_INT_2G		BIT(8)
#define MT_EE_NIC_CONF_0_PA_INT_5G		BIT(9)
#define MT_EE_NIC_CONF_0_BOARD_TYPE		GENMASK(13, 12)

#define MT_EE_NIC_CONF_1_TEMP_TX_ALC		BIT(1)
#define MT_EE_NIC_CONF_1_LNA_EXT_2G		BIT(2)
#define MT_EE_NIC_CONF_1_LNA_EXT_5G		BIT(3)
#define MT_EE_NIC_CONF_1_TX_ALC_EN		BIT(13)

#define MT_EE_NIC_CONF_2_RX_STREAM		GENMASK(3, 0)
#define MT_EE_NIC_CONF_2_TX_STREAM		GENMASK(7, 4)
#define MT_EE_NIC_CONF_2_HW_ANTDIV		BIT(8)
#define MT_EE_NIC_CONF_2_XTAL_OPTION		GENMASK(10, 9)
#define MT_EE_NIC_CONF_2_TEMP_DISABLE		BIT(11)
#define MT_EE_NIC_CONF_2_COEX_METHOD		GENMASK(15, 13)

enum mt76_board_type {
	BOARD_TYPE_2GHZ = 1,
	BOARD_TYPE_5GHZ = 2,
};

enum mt76_cal_channel_group {
	MT_CH_5G_JAPAN,
	MT_CH_5G_UNII_1,
	MT_CH_5G_UNII_2,
	MT_CH_5G_UNII_2E_1,
	MT_CH_5G_UNII_2E_2,
	MT_CH_5G_UNII_3,
	__MT_CH_MAX
};

struct mt76_rate_power {
	s8 cck[2];
	s8 ofdm[4];
	s8 ht[8];
	s8 vht[5];
};

struct mt76_tx_power_info {
	u8 target_power;

	s8 delta_bw40;
	s8 delta_bw80;

	struct {
		s8 tssi_slope;
		s8 tssi_offset;
		s8 target_power;
		s8 delta;
	} chain[MT_MAX_CHAINS];
};

struct mt76_temp_comp {
	u8 temp_25_ref;
	int lower_bound; /* J */
	int upper_bound; /* J */
	unsigned int high_slope; /* J / dB */
	unsigned int low_slope; /* J / dB */
};

static inline int
mt76_eeprom_get(struct mt76_dev *dev, enum mt76_eeprom_field field)
{
	if ((field & 1) || field >= __MT_EE_MAX)
		return -1;

	return get_unaligned_le16(dev->eeprom.data + field);
}

void mt76_get_rate_power(struct mt76_dev *dev, struct mt76_rate_power *t);
void mt76_get_power_info(struct mt76_dev *dev, struct mt76_tx_power_info *t);
int mt76_get_temp_comp(struct mt76_dev *dev, struct mt76_temp_comp *t);
bool mt76_ext_pa_enabled(struct mt76_dev *dev, enum ieee80211_band band);
void mt76_read_rx_gain(struct mt76_dev *dev);

static inline bool
mt76_temp_tx_alc_enabled(struct mt76_dev *dev)
{
	return mt76_eeprom_get(dev, MT_EE_NIC_CONF_1) &
	       MT_EE_NIC_CONF_1_TEMP_TX_ALC;
}

static inline bool
mt76_tssi_enabled(struct mt76_dev *dev)
{
	return !mt76_temp_tx_alc_enabled(dev) &&
	       (mt76_eeprom_get(dev, MT_EE_NIC_CONF_1) &
	        MT_EE_NIC_CONF_1_TX_ALC_EN);
}


static inline bool
mt76_has_ext_lna(struct mt76_dev *dev)
{
	u32 val = mt76_eeprom_get(dev, MT_EE_NIC_CONF_1);

	if (dev->chandef.chan->band == IEEE80211_BAND_2GHZ)
		return val & MT_EE_NIC_CONF_1_LNA_EXT_2G;
	else
		return val & MT_EE_NIC_CONF_1_LNA_EXT_5G;
}

#endif