// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2019, Linaro Limited
 */

#include <linux/bitops.h>
#include <linux/regmap.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include "tsens.h"

/* ----- SROT ------ */
#define SROT_HW_VER_OFF 0x0000
#define SROT_CTRL_OFF           0x0004

/* ----- TM ------ */
#define TM_INT_EN_OFF                           0x0000
#define TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF       0x0004
#define TM_Sn_STATUS_OFF                        0x0044
#define TM_TRDY_OFF                             0x0084
#define TM_HIGH_LOW_INT_STATUS_OFF              0x0088
#define TM_HIGH_LOW_Sn_INT_THRESHOLD_OFF        0x0090

static struct tsens_legacy_calibration_format tsens_qcs404_nvmem = {
        .base_len = 8,
        .base_shift = 2,
        .sp_len = 6,
        .mode = { 4, 0 },
        .invalid = { 4, 2 },
        .base = { { 4, 3 }, { 4, 11 } },
        .sp = {
                { { 0, 0 }, { 0, 6 } },
                { { 0, 12 }, { 0, 18 } },
                { { 0, 24 }, { 0, 30 } },
                { { 1, 4 },  { 1, 10 } },
                { { 1, 16 }, { 1, 22 } },
                { { 2, 0 },  { 2, 6 } },
                { { 2, 12 }, { 2, 18 } },
                { { 2, 24 }, { 2, 30 } },
                { { 3, 4 },  { 3, 10 } },
                { { 3, 16 }, { 3, 22 } },
        },
};

static int calibrate_v1(struct tsens_priv *priv)
{
        u32 p1[10], p2[10];
        u32 *qfprom_cdata;
        int mode, ret;

        ret = tsens_calibrate_common(priv);
        if (!ret)
                return 0;

        qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib");
        if (IS_ERR(qfprom_cdata))
                return PTR_ERR(qfprom_cdata);

        mode = tsens_read_calibration_legacy(priv, &tsens_qcs404_nvmem,
                                             p1, p2,
                                             qfprom_cdata, NULL);

        compute_intercept_slope(priv, p1, p2, mode);
        kfree(qfprom_cdata);

        return 0;
}

/* v1.x: msm8956,8976,qcs404,405 */

static struct tsens_features tsens_v1_feat = {
        .ver_major      = VER_1_X,
        .crit_int       = 0,
        .combo_int      = 0,
        .adc            = 1,
        .srot_split     = 1,
        .max_sensors    = 11,
        .trip_min_temp  = -40000,
        .trip_max_temp  = 120000,
};

static struct tsens_features tsens_v1_no_rpm_feat = {
        .ver_major      = VER_1_X_NO_RPM,
        .crit_int       = 0,
        .combo_int      = 0,
        .adc            = 1,
        .srot_split     = 1,
        .max_sensors    = 11,
        .trip_min_temp  = -40000,
        .trip_max_temp  = 120000,
};

static const struct reg_field tsens_v1_regfields[MAX_REGFIELDS] = {
        /* ----- SROT ------ */
        /* VERSION */
        [VER_MAJOR] = REG_FIELD(SROT_HW_VER_OFF, 28, 31),
        [VER_MINOR] = REG_FIELD(SROT_HW_VER_OFF, 16, 27),
        [VER_STEP]  = REG_FIELD(SROT_HW_VER_OFF,  0, 15),
        /* CTRL_OFFSET */
        [TSENS_EN]     = REG_FIELD(SROT_CTRL_OFF, 0,  0),
        [TSENS_SW_RST] = REG_FIELD(SROT_CTRL_OFF, 1,  1),
        [SENSOR_EN]    = REG_FIELD(SROT_CTRL_OFF, 3, 13),

        /* ----- TM ------ */
        /* INTERRUPT ENABLE */
        [INT_EN]     = REG_FIELD(TM_INT_EN_OFF, 0, 0),

        /* UPPER/LOWER TEMPERATURE THRESHOLDS */
        REG_FIELD_FOR_EACH_SENSOR11(LOW_THRESH,    TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF,  0,  9),
        REG_FIELD_FOR_EACH_SENSOR11(UP_THRESH,     TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 10, 19),

        /* UPPER/LOWER INTERRUPTS [CLEAR/STATUS] */
        REG_FIELD_FOR_EACH_SENSOR11(LOW_INT_CLEAR, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 20, 20),
        REG_FIELD_FOR_EACH_SENSOR11(UP_INT_CLEAR,  TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 21, 21),
        [LOW_INT_STATUS_0] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  0,  0),
        [LOW_INT_STATUS_1] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  1,  1),
        [LOW_INT_STATUS_2] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  2,  2),
        [LOW_INT_STATUS_3] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  3,  3),
        [LOW_INT_STATUS_4] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  4,  4),
        [LOW_INT_STATUS_5] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  5,  5),
        [LOW_INT_STATUS_6] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  6,  6),
        [LOW_INT_STATUS_7] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  7,  7),
        [UP_INT_STATUS_0]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  8,  8),
        [UP_INT_STATUS_1]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF,  9,  9),
        [UP_INT_STATUS_2]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 10, 10),
        [UP_INT_STATUS_3]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 11, 11),
        [UP_INT_STATUS_4]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 12, 12),
        [UP_INT_STATUS_5]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 13, 13),
        [UP_INT_STATUS_6]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 14, 14),
        [UP_INT_STATUS_7]  = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 15, 15),

        /* NO CRITICAL INTERRUPT SUPPORT on v1 */

        /* Sn_STATUS */
        REG_FIELD_FOR_EACH_SENSOR11(LAST_TEMP,    TM_Sn_STATUS_OFF,  0,  9),
        REG_FIELD_FOR_EACH_SENSOR11(VALID,        TM_Sn_STATUS_OFF, 14, 14),
        /* xxx_STATUS bits: 1 == threshold violated */
        REG_FIELD_FOR_EACH_SENSOR11(MIN_STATUS,   TM_Sn_STATUS_OFF, 10, 10),
        REG_FIELD_FOR_EACH_SENSOR11(LOWER_STATUS, TM_Sn_STATUS_OFF, 11, 11),
        REG_FIELD_FOR_EACH_SENSOR11(UPPER_STATUS, TM_Sn_STATUS_OFF, 12, 12),
        /* No CRITICAL field on v1.x */
        REG_FIELD_FOR_EACH_SENSOR11(MAX_STATUS,   TM_Sn_STATUS_OFF, 13, 13),

        /* TRDY: 1=ready, 0=in progress */
        [TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0),
};

static int __init init_8956(struct tsens_priv *priv) {
        priv->sensor[0].slope = 3313;
        priv->sensor[1].slope = 3275;
        priv->sensor[2].slope = 3320;
        priv->sensor[3].slope = 3246;
        priv->sensor[4].slope = 3279;
        priv->sensor[5].slope = 3257;
        priv->sensor[6].slope = 3234;
        priv->sensor[7].slope = 3269;
        priv->sensor[8].slope = 3255;
        priv->sensor[9].slope = 3239;
        priv->sensor[10].slope = 3286;

        return init_common(priv);
}

static int __init init_tsens_v1_no_rpm(struct tsens_priv *priv)
{
        int i, ret;
        u32 mask = 0;

        ret = init_common(priv);
        if (ret < 0) {
                dev_err(priv->dev, "Init common failed %d\n", ret);
                return ret;
        }

        ret = regmap_field_write(priv->rf[TSENS_SW_RST], 1);
        if (ret) {
                dev_err(priv->dev, "Reset failed\n");
                return ret;
        }

        for (i = 0; i < priv->num_sensors; i++)
                mask |= BIT(priv->sensor[i].hw_id);

        ret = regmap_field_update_bits(priv->rf[SENSOR_EN], mask, mask);
        if (ret) {
                dev_err(priv->dev, "Sensor Enable failed\n");
                return ret;
        }

        ret = regmap_field_write(priv->rf[TSENS_EN], 1);
        if (ret) {
                dev_err(priv->dev, "Enable failed\n");
                return ret;
        }

        ret = regmap_field_write(priv->rf[TSENS_SW_RST], 0);

        return ret;
}

static const struct tsens_ops ops_generic_v1 = {
        .init           = init_common,
        .calibrate      = calibrate_v1,
        .get_temp       = get_temp_tsens_valid,
};

struct tsens_plat_data data_tsens_v1 = {
        .ops            = &ops_generic_v1,
        .feat           = &tsens_v1_feat,
        .fields = tsens_v1_regfields,
};

static const struct tsens_ops ops_common = {
        .init           = init_common,
        .calibrate      = tsens_calibrate_common,
        .get_temp       = get_temp_tsens_valid,
};

struct tsens_plat_data data_8937 = {
        .num_sensors    = 11,
        .ops            = &ops_common,
        .feat           = &tsens_v1_feat,
        .fields         = tsens_v1_regfields,
};

static const struct tsens_ops ops_8956 = {
        .init           = init_8956,
        .calibrate      = tsens_calibrate_common,
        .get_temp       = get_temp_tsens_valid,
};

struct tsens_plat_data data_8956 = {
        .num_sensors    = 11,
        .ops            = &ops_8956,
        .feat           = &tsens_v1_feat,
        .fields         = tsens_v1_regfields,
};

struct tsens_plat_data data_8976 = {
        .num_sensors    = 11,
        .ops            = &ops_common,
        .feat           = &tsens_v1_feat,
        .fields         = tsens_v1_regfields,
};

static const struct tsens_ops ops_ipq5018 = {
        .init           = init_tsens_v1_no_rpm,
        .calibrate      = tsens_calibrate_common,
        .get_temp       = get_temp_tsens_valid,
};

const struct tsens_plat_data data_ipq5018 = {
        .num_sensors    = 5,
        .ops            = &ops_ipq5018,
        .hw_ids         = (unsigned int []){0, 1, 2, 3, 4},
        .feat           = &tsens_v1_no_rpm_feat,
        .fields         = tsens_v1_regfields,
};