// SPDX-License-Identifier: GPL-2.0-only
/*
 * wm8711.c  --  WM8711 ALSA SoC Audio driver
 *
 * Copyright 2006 Wolfson Microelectronics
 *
 * Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com>
 *
 * Based on wm8731.c by Richard Purdie
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/initval.h>

#include "wm8711.h"

/* codec private data */
struct wm8711_priv {
        struct regmap *regmap;
        unsigned int sysclk;
};

/*
 * wm8711 register cache
 * We can't read the WM8711 register space when we are
 * using 2 wire for device control, so we cache them instead.
 * There is no point in caching the reset register
 */
static const struct reg_default wm8711_reg_defaults[] = {
        { 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 },
        { 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 },
};

static bool wm8711_volatile(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case WM8711_RESET:
                return true;
        default:
                return false;
        }
}

#define wm8711_reset(c) snd_soc_component_write(c, WM8711_RESET, 0)

static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);

static const struct snd_kcontrol_new wm8711_snd_controls[] = {

SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
                 0, 127, 0, out_tlv),
SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
        7, 1, 0),

};

/* Output Mixer */
static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
};

static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
        &wm8711_output_mixer_controls[0],
        ARRAY_SIZE(wm8711_output_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("LHPOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("RHPOUT"),
};

static const struct snd_soc_dapm_route wm8711_intercon[] = {
        /* output mixer */
        {"Output Mixer", "Line Bypass Switch", "Line Input"},
        {"Output Mixer", "HiFi Playback Switch", "DAC"},

        /* outputs */
        {"RHPOUT", NULL, "Output Mixer"},
        {"ROUT", NULL, "Output Mixer"},
        {"LHPOUT", NULL, "Output Mixer"},
        {"LOUT", NULL, "Output Mixer"},
};

struct _coeff_div {
        u32 mclk;
        u32 rate;
        u16 fs;
        u8 sr:4;
        u8 bosr:1;
        u8 usb:1;
};

/* codec mclk clock divider coefficients */
static const struct _coeff_div coeff_div[] = {
        /* 48k */
        {12288000, 48000, 256, 0x0, 0x0, 0x0},
        {18432000, 48000, 384, 0x0, 0x1, 0x0},
        {12000000, 48000, 250, 0x0, 0x0, 0x1},

        /* 32k */
        {12288000, 32000, 384, 0x6, 0x0, 0x0},
        {18432000, 32000, 576, 0x6, 0x1, 0x0},
        {12000000, 32000, 375, 0x6, 0x0, 0x1},

        /* 8k */
        {12288000, 8000, 1536, 0x3, 0x0, 0x0},
        {18432000, 8000, 2304, 0x3, 0x1, 0x0},
        {11289600, 8000, 1408, 0xb, 0x0, 0x0},
        {16934400, 8000, 2112, 0xb, 0x1, 0x0},
        {12000000, 8000, 1500, 0x3, 0x0, 0x1},

        /* 96k */
        {12288000, 96000, 128, 0x7, 0x0, 0x0},
        {18432000, 96000, 192, 0x7, 0x1, 0x0},
        {12000000, 96000, 125, 0x7, 0x0, 0x1},

        /* 44.1k */
        {11289600, 44100, 256, 0x8, 0x0, 0x0},
        {16934400, 44100, 384, 0x8, 0x1, 0x0},
        {12000000, 44100, 272, 0x8, 0x1, 0x1},

        /* 88.2k */
        {11289600, 88200, 128, 0xf, 0x0, 0x0},
        {16934400, 88200, 192, 0xf, 0x1, 0x0},
        {12000000, 88200, 136, 0xf, 0x1, 0x1},
};

static inline int get_coeff(int mclk, int rate)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
                if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
                        return i;
        }
        return 0;
}

static int wm8711_hw_params(struct snd_pcm_substream *substream,
        struct snd_pcm_hw_params *params,
        struct snd_soc_dai *dai)
{
        struct snd_soc_component *component = dai->component;
        struct wm8711_priv *wm8711 =  snd_soc_component_get_drvdata(component);
        u16 iface = snd_soc_component_read(component, WM8711_IFACE) & 0xfff3;
        int i = get_coeff(wm8711->sysclk, params_rate(params));
        u16 srate = (coeff_div[i].sr << 2) |
                (coeff_div[i].bosr << 1) | coeff_div[i].usb;

        snd_soc_component_write(component, WM8711_SRATE, srate);

        /* bit size */
        switch (params_width(params)) {
        case 16:
                break;
        case 20:
                iface |= 0x0004;
                break;
        case 24:
                iface |= 0x0008;
                break;
        }

        snd_soc_component_write(component, WM8711_IFACE, iface);
        return 0;
}

static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
                              struct snd_soc_dai *dai)
{
        struct snd_soc_component *component = dai->component;

        /* set active */
        snd_soc_component_write(component, WM8711_ACTIVE, 0x0001);

        return 0;
}

static void wm8711_shutdown(struct snd_pcm_substream *substream,
                            struct snd_soc_dai *dai)
{
        struct snd_soc_component *component = dai->component;

        /* deactivate */
        if (!snd_soc_component_active(component)) {
                udelay(50);
                snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
        }
}

static int wm8711_mute(struct snd_soc_dai *dai, int mute, int direction)
{
        struct snd_soc_component *component = dai->component;
        u16 mute_reg = snd_soc_component_read(component, WM8711_APDIGI) & 0xfff7;

        if (mute)
                snd_soc_component_write(component, WM8711_APDIGI, mute_reg | 0x8);
        else
                snd_soc_component_write(component, WM8711_APDIGI, mute_reg);

        return 0;
}

static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
                int clk_id, unsigned int freq, int dir)
{
        struct snd_soc_component *component = codec_dai->component;
        struct wm8711_priv *wm8711 =  snd_soc_component_get_drvdata(component);

        switch (freq) {
        case 11289600:
        case 12000000:
        case 12288000:
        case 16934400:
        case 18432000:
                wm8711->sysclk = freq;
                return 0;
        }
        return -EINVAL;
}

static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
                unsigned int fmt)
{
        struct snd_soc_component *component = codec_dai->component;
        u16 iface = snd_soc_component_read(component, WM8711_IFACE) & 0x000c;

        /* set master/slave audio interface */
        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
        case SND_SOC_DAIFMT_CBP_CFP:
                iface |= 0x0040;
                break;
        case SND_SOC_DAIFMT_CBC_CFC:
                break;
        default:
                return -EINVAL;
        }

        /* interface format */
        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
        case SND_SOC_DAIFMT_I2S:
                iface |= 0x0002;
                break;
        case SND_SOC_DAIFMT_RIGHT_J:
                break;
        case SND_SOC_DAIFMT_LEFT_J:
                iface |= 0x0001;
                break;
        case SND_SOC_DAIFMT_DSP_A:
                iface |= 0x0003;
                break;
        case SND_SOC_DAIFMT_DSP_B:
                iface |= 0x0013;
                break;
        default:
                return -EINVAL;
        }

        /* clock inversion */
        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
        case SND_SOC_DAIFMT_NB_NF:
                break;
        case SND_SOC_DAIFMT_IB_IF:
                iface |= 0x0090;
                break;
        case SND_SOC_DAIFMT_IB_NF:
                iface |= 0x0080;
                break;
        case SND_SOC_DAIFMT_NB_IF:
                iface |= 0x0010;
                break;
        default:
                return -EINVAL;
        }

        /* set iface */
        snd_soc_component_write(component, WM8711_IFACE, iface);
        return 0;
}

static int wm8711_set_bias_level(struct snd_soc_component *component,
        enum snd_soc_bias_level level)
{
        struct wm8711_priv *wm8711 = snd_soc_component_get_drvdata(component);
        struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component);
        u16 reg = snd_soc_component_read(component, WM8711_PWR) & 0xff7f;

        switch (level) {
        case SND_SOC_BIAS_ON:
                snd_soc_component_write(component, WM8711_PWR, reg);
                break;
        case SND_SOC_BIAS_PREPARE:
                break;
        case SND_SOC_BIAS_STANDBY:
                if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_OFF)
                        regcache_sync(wm8711->regmap);

                snd_soc_component_write(component, WM8711_PWR, reg | 0x0040);
                break;
        case SND_SOC_BIAS_OFF:
                snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
                snd_soc_component_write(component, WM8711_PWR, 0xffff);
                break;
        }
        return 0;
}

#define WM8711_RATES SNDRV_PCM_RATE_8000_96000

#define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
        SNDRV_PCM_FMTBIT_S24_LE)

static const struct snd_soc_dai_ops wm8711_ops = {
        .prepare = wm8711_pcm_prepare,
        .hw_params = wm8711_hw_params,
        .shutdown = wm8711_shutdown,
        .mute_stream = wm8711_mute,
        .set_sysclk = wm8711_set_dai_sysclk,
        .set_fmt = wm8711_set_dai_fmt,
        .no_capture_mute = 1,
};

static struct snd_soc_dai_driver wm8711_dai = {
        .name = "wm8711-hifi",
        .playback = {
                .stream_name = "Playback",
                .channels_min = 1,
                .channels_max = 2,
                .rates = WM8711_RATES,
                .formats = WM8711_FORMATS,
        },
        .ops = &wm8711_ops,
};

static int wm8711_probe(struct snd_soc_component *component)
{
        int ret;

        ret = wm8711_reset(component);
        if (ret < 0) {
                dev_err(component->dev, "Failed to issue reset\n");
                return ret;
        }

        /* Latch the update bits */
        snd_soc_component_update_bits(component, WM8711_LOUT1V, 0x0100, 0x0100);
        snd_soc_component_update_bits(component, WM8711_ROUT1V, 0x0100, 0x0100);

        return ret;

}

static const struct snd_soc_component_driver soc_component_dev_wm8711 = {
        .probe                  = wm8711_probe,
        .set_bias_level         = wm8711_set_bias_level,
        .controls               = wm8711_snd_controls,
        .num_controls           = ARRAY_SIZE(wm8711_snd_controls),
        .dapm_widgets           = wm8711_dapm_widgets,
        .num_dapm_widgets       = ARRAY_SIZE(wm8711_dapm_widgets),
        .dapm_routes            = wm8711_intercon,
        .num_dapm_routes        = ARRAY_SIZE(wm8711_intercon),
        .suspend_bias_off       = 1,
        .idle_bias_on           = 1,
        .use_pmdown_time        = 1,
        .endianness             = 1,
};

static const struct of_device_id wm8711_of_match[] = {
        { .compatible = "wlf,wm8711", },
        { }
};
MODULE_DEVICE_TABLE(of, wm8711_of_match);

static const struct regmap_config wm8711_regmap = {
        .reg_bits = 7,
        .val_bits = 9,
        .max_register = WM8711_RESET,

        .reg_defaults = wm8711_reg_defaults,
        .num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults),
        .cache_type = REGCACHE_MAPLE,

        .volatile_reg = wm8711_volatile,
};

#if defined(CONFIG_SPI_MASTER)
static int wm8711_spi_probe(struct spi_device *spi)
{
        struct wm8711_priv *wm8711;
        int ret;

        wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv),
                              GFP_KERNEL);
        if (wm8711 == NULL)
                return -ENOMEM;

        wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap);
        if (IS_ERR(wm8711->regmap))
                return PTR_ERR(wm8711->regmap);

        spi_set_drvdata(spi, wm8711);

        ret = devm_snd_soc_register_component(&spi->dev,
                        &soc_component_dev_wm8711, &wm8711_dai, 1);

        return ret;
}

static struct spi_driver wm8711_spi_driver = {
        .driver = {
                .name   = "wm8711",
                .of_match_table = wm8711_of_match,
        },
        .probe          = wm8711_spi_probe,
};
#endif /* CONFIG_SPI_MASTER */

#if IS_ENABLED(CONFIG_I2C)
static int wm8711_i2c_probe(struct i2c_client *client)
{
        struct wm8711_priv *wm8711;
        int ret;

        wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv),
                              GFP_KERNEL);
        if (wm8711 == NULL)
                return -ENOMEM;

        wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap);
        if (IS_ERR(wm8711->regmap))
                return PTR_ERR(wm8711->regmap);

        i2c_set_clientdata(client, wm8711);

        ret = devm_snd_soc_register_component(&client->dev,
                        &soc_component_dev_wm8711, &wm8711_dai, 1);

        return ret;
}

static const struct i2c_device_id wm8711_i2c_id[] = {
        { .name = "wm8711" },
        { }
};
MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);

static struct i2c_driver wm8711_i2c_driver = {
        .driver = {
                .name = "wm8711",
                .of_match_table = wm8711_of_match,
        },
        .probe = wm8711_i2c_probe,
        .id_table = wm8711_i2c_id,
};
#endif

static int __init wm8711_modinit(void)
{
        int ret;
#if IS_ENABLED(CONFIG_I2C)
        ret = i2c_add_driver(&wm8711_i2c_driver);
        if (ret != 0) {
                printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
                       ret);
        }
#endif
#if defined(CONFIG_SPI_MASTER)
        ret = spi_register_driver(&wm8711_spi_driver);
        if (ret != 0) {
                printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
                       ret);
        }
#endif
        return 0;
}
module_init(wm8711_modinit);

static void __exit wm8711_exit(void)
{
#if IS_ENABLED(CONFIG_I2C)
        i2c_del_driver(&wm8711_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
        spi_unregister_driver(&wm8711_spi_driver);
#endif
}
module_exit(wm8711_exit);

MODULE_DESCRIPTION("ASoC WM8711 driver");
MODULE_AUTHOR("Mike Arthur");
MODULE_LICENSE("GPL");