/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
 */

#ifndef __MT7601U_EEPROM_H
#define __MT7601U_EEPROM_H

struct mt7601u_dev;

#define MT7601U_EE_MAX_VER                      0x0d
#define MT7601U_EEPROM_SIZE                     256

#define MT7601U_DEFAULT_TX_POWER                6

enum mt76_eeprom_field {
        MT_EE_CHIP_ID =                         0x00,
        MT_EE_VERSION_FAE =                     0x02,
        MT_EE_VERSION_EE =                      0x03,
        MT_EE_MAC_ADDR =                        0x04,
        MT_EE_NIC_CONF_0 =                      0x34,
        MT_EE_NIC_CONF_1 =                      0x36,
        MT_EE_COUNTRY_REGION =                  0x39,
        MT_EE_FREQ_OFFSET =                     0x3a,
        MT_EE_NIC_CONF_2 =                      0x42,

        MT_EE_LNA_GAIN =                        0x44,
        MT_EE_RSSI_OFFSET =                     0x46,

        MT_EE_TX_POWER_DELTA_BW40 =             0x50,
        MT_EE_TX_POWER_OFFSET =                 0x52,

        MT_EE_TX_TSSI_SLOPE =                   0x6e,
        MT_EE_TX_TSSI_OFFSET_GROUP =            0x6f,
        MT_EE_TX_TSSI_OFFSET =                  0x76,

        MT_EE_TX_TSSI_TARGET_POWER =            0xd0,
        MT_EE_REF_TEMP =                        0xd1,
        MT_EE_FREQ_OFFSET_COMPENSATION =        0xdb,
        MT_EE_TX_POWER_BYRATE_BASE =            0xde,

        MT_EE_USAGE_MAP_START =                 0x1e0,
        MT_EE_USAGE_MAP_END =                   0x1fc,
};

#define MT_EE_NIC_CONF_0_RX_PATH                GENMASK(3, 0)
#define MT_EE_NIC_CONF_0_TX_PATH                GENMASK(7, 4)
#define MT_EE_NIC_CONF_0_BOARD_TYPE             GENMASK(13, 12)

#define MT_EE_NIC_CONF_1_HW_RF_CTRL             BIT(0)
#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)

#define MT_EE_TX_POWER_BYRATE(i)                (MT_EE_TX_POWER_BYRATE_BASE + \
                                                 (i) * 4)

#define MT_EFUSE_USAGE_MAP_SIZE                 (MT_EE_USAGE_MAP_END -  \
                                                 MT_EE_USAGE_MAP_START + 1)

enum mt7601u_eeprom_access_modes {
        MT_EE_READ = 0,
        MT_EE_PHYSICAL_READ = 1,
};

struct power_per_rate  {
        u8 raw;  /* validated s6 value */
        s8 bw20; /* sign-extended int */
        s8 bw40; /* sign-extended int */
};

/* Power per rate - one value per two rates */
struct mt7601u_rate_power {
        struct power_per_rate cck[2];
        struct power_per_rate ofdm[4];
        struct power_per_rate ht[4];
};

struct reg_channel_bounds {
        u8 start;
        u8 num;
};

struct mt7601u_eeprom_params {
        bool tssi_enabled;
        u8 rf_freq_off;
        s8 rssi_offset[2];
        s8 ref_temp;
        s8 lna_gain;

        u8 chan_pwr[14];
        struct mt7601u_rate_power power_rate_table;
        s8 real_cck_bw20[2];

        /* TSSI stuff - only with internal TX ALC */
        struct tssi_data {
                int tx0_delta_offset;
                u8 slope;
                u8 offset[3];
        } tssi_data;

        struct reg_channel_bounds reg;
};

int mt7601u_eeprom_init(struct mt7601u_dev *dev);

static inline u32 s6_validate(u32 reg)
{
        WARN_ON(reg & ~GENMASK(5, 0));
        return reg & GENMASK(5, 0);
}

static inline int s6_to_int(u32 reg)
{
        int s6;

        s6 = s6_validate(reg);
        if (s6 & BIT(5))
                s6 -= BIT(6);

        return s6;
}

static inline u32 int_to_s6(int val)
{
        if (val < -0x20)
                return 0x20;
        if (val > 0x1f)
                return 0x1f;

        return val & 0x3f;
}

#endif