// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * ad1980.c  --  ALSA Soc AD1980 codec support
 *
 * Copyright:   Analog Devices Inc.
 * Author:      Roy Huang <roy.huang@analog.com>
 *              Cliff Cai <cliff.cai@analog.com>
 */

/*
 * WARNING:
 *
 * Because Analog Devices Inc. discontinued the ad1980 sound chip since
 * Sep. 2009, this ad1980 driver is not maintained, tested and supported
 * by ADI now.
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>

static const struct reg_default ad1980_reg_defaults[] = {
        { 0x02, 0x8000 },
        { 0x04, 0x8000 },
        { 0x06, 0x8000 },
        { 0x0c, 0x8008 },
        { 0x0e, 0x8008 },
        { 0x10, 0x8808 },
        { 0x12, 0x8808 },
        { 0x16, 0x8808 },
        { 0x18, 0x8808 },
        { 0x1a, 0x0000 },
        { 0x1c, 0x8000 },
        { 0x20, 0x0000 },
        { 0x28, 0x03c7 },
        { 0x2c, 0xbb80 },
        { 0x2e, 0xbb80 },
        { 0x30, 0xbb80 },
        { 0x32, 0xbb80 },
        { 0x36, 0x8080 },
        { 0x38, 0x8080 },
        { 0x3a, 0x2000 },
        { 0x60, 0x0000 },
        { 0x62, 0x0000 },
        { 0x72, 0x0000 },
        { 0x74, 0x1001 },
        { 0x76, 0x0000 },
};

static bool ad1980_readable_reg(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case AC97_RESET ... AC97_MASTER_MONO:
        case AC97_PHONE ... AC97_CD:
        case AC97_AUX ... AC97_GENERAL_PURPOSE:
        case AC97_POWERDOWN ... AC97_PCM_LR_ADC_RATE:
        case AC97_SPDIF:
        case AC97_CODEC_CLASS_REV:
        case AC97_PCI_SVID:
        case AC97_AD_CODEC_CFG:
        case AC97_AD_JACK_SPDIF:
        case AC97_AD_SERIAL_CFG:
        case AC97_VENDOR_ID1:
        case AC97_VENDOR_ID2:
                return true;
        default:
                return false;
        }
}

static bool ad1980_writeable_reg(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case AC97_VENDOR_ID1:
        case AC97_VENDOR_ID2:
                return false;
        default:
                return ad1980_readable_reg(dev, reg);
        }
}

static const struct regmap_config ad1980_regmap_config = {
        .reg_bits = 16,
        .reg_stride = 2,
        .val_bits = 16,
        .max_register = 0x7e,
        .cache_type = REGCACHE_MAPLE,

        .volatile_reg = regmap_ac97_default_volatile,
        .readable_reg = ad1980_readable_reg,
        .writeable_reg = ad1980_writeable_reg,

        .reg_defaults = ad1980_reg_defaults,
        .num_reg_defaults = ARRAY_SIZE(ad1980_reg_defaults),
};

static const char *ad1980_rec_sel[] = {"Mic", "CD", "NC", "AUX", "Line",
                "Stereo Mix", "Mono Mix", "Phone"};

static SOC_ENUM_DOUBLE_DECL(ad1980_cap_src,
                            AC97_REC_SEL, 8, 0, ad1980_rec_sel);

static const struct snd_kcontrol_new ad1980_snd_ac97_controls[] = {
SOC_DOUBLE("Master Playback Volume", AC97_MASTER, 8, 0, 31, 1),
SOC_SINGLE("Master Playback Switch", AC97_MASTER, 15, 1, 1),

SOC_DOUBLE("Headphone Playback Volume", AC97_HEADPHONE, 8, 0, 31, 1),
SOC_SINGLE("Headphone Playback Switch", AC97_HEADPHONE, 15, 1, 1),

SOC_DOUBLE("PCM Playback Volume", AC97_PCM, 8, 0, 31, 1),
SOC_SINGLE("PCM Playback Switch", AC97_PCM, 15, 1, 1),

SOC_DOUBLE("PCM Capture Volume", AC97_REC_GAIN, 8, 0, 31, 0),
SOC_SINGLE("PCM Capture Switch", AC97_REC_GAIN, 15, 1, 1),

SOC_SINGLE("Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1),
SOC_SINGLE("Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),

SOC_SINGLE("Phone Capture Volume", AC97_PHONE, 0, 31, 1),
SOC_SINGLE("Phone Capture Switch", AC97_PHONE, 15, 1, 1),

SOC_SINGLE("Mic Volume", AC97_MIC, 0, 31, 1),
SOC_SINGLE("Mic Switch", AC97_MIC, 15, 1, 1),

SOC_SINGLE("Stereo Mic Switch", AC97_AD_MISC, 6, 1, 0),
SOC_DOUBLE("Line HP Swap Switch", AC97_AD_MISC, 10, 5, 1, 0),

SOC_DOUBLE("Surround Playback Volume", AC97_SURROUND_MASTER, 8, 0, 31, 1),
SOC_DOUBLE("Surround Playback Switch", AC97_SURROUND_MASTER, 15, 7, 1, 1),

SOC_DOUBLE("Center/LFE Playback Volume", AC97_CENTER_LFE_MASTER, 8, 0, 31, 1),
SOC_DOUBLE("Center/LFE Playback Switch", AC97_CENTER_LFE_MASTER, 15, 7, 1, 1),

SOC_ENUM("Capture Source", ad1980_cap_src),

SOC_SINGLE("Mic Boost Switch", AC97_MIC, 6, 1, 0),
};

static const struct snd_soc_dapm_widget ad1980_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("MIC1"),
SND_SOC_DAPM_INPUT("MIC2"),
SND_SOC_DAPM_INPUT("CD_L"),
SND_SOC_DAPM_INPUT("CD_R"),
SND_SOC_DAPM_INPUT("AUX_L"),
SND_SOC_DAPM_INPUT("AUX_R"),
SND_SOC_DAPM_INPUT("LINE_IN_L"),
SND_SOC_DAPM_INPUT("LINE_IN_R"),

SND_SOC_DAPM_OUTPUT("LFE_OUT"),
SND_SOC_DAPM_OUTPUT("CENTER_OUT"),
SND_SOC_DAPM_OUTPUT("LINE_OUT_L"),
SND_SOC_DAPM_OUTPUT("LINE_OUT_R"),
SND_SOC_DAPM_OUTPUT("MONO_OUT"),
SND_SOC_DAPM_OUTPUT("HP_OUT_L"),
SND_SOC_DAPM_OUTPUT("HP_OUT_R"),
};

static const struct snd_soc_dapm_route ad1980_dapm_routes[] = {
        { "Capture", NULL, "MIC1" },
        { "Capture", NULL, "MIC2" },
        { "Capture", NULL, "CD_L" },
        { "Capture", NULL, "CD_R" },
        { "Capture", NULL, "AUX_L" },
        { "Capture", NULL, "AUX_R" },
        { "Capture", NULL, "LINE_IN_L" },
        { "Capture", NULL, "LINE_IN_R" },

        { "LFE_OUT", NULL, "Playback" },
        { "CENTER_OUT", NULL, "Playback" },
        { "LINE_OUT_L", NULL, "Playback" },
        { "LINE_OUT_R", NULL, "Playback" },
        { "MONO_OUT", NULL, "Playback" },
        { "HP_OUT_L", NULL, "Playback" },
        { "HP_OUT_R", NULL, "Playback" },
};

static struct snd_soc_dai_driver ad1980_dai = {
        .name = "ad1980-hifi",
        .playback = {
                .stream_name = "Playback",
                .channels_min = 2,
                .channels_max = 6,
                .rates = SNDRV_PCM_RATE_48000,
                .formats = SND_SOC_STD_AC97_FMTS, },
        .capture = {
                .stream_name = "Capture",
                .channels_min = 2,
                .channels_max = 2,
                .rates = SNDRV_PCM_RATE_48000,
                .formats = SND_SOC_STD_AC97_FMTS, },
};

#define AD1980_VENDOR_ID 0x41445300
#define AD1980_VENDOR_MASK 0xffffff00

static int ad1980_reset(struct snd_soc_component *component, int try_warm)
{
        struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
        unsigned int retry_cnt = 0;
        int ret;

        do {
                ret = snd_ac97_reset(ac97, true, AD1980_VENDOR_ID,
                        AD1980_VENDOR_MASK);
                if (ret >= 0)
                        return 0;

                /*
                 * Set bit 16slot in register 74h, then every slot will has only
                 * 16 bits. This command is sent out in 20bit mode, in which
                 * case the first nibble of data is eaten by the addr. (Tag is
                 * always 16 bit)
                 */
                snd_soc_component_write(component, AC97_AD_SERIAL_CFG, 0x9900);

        } while (retry_cnt++ < 10);

        dev_err(component->dev, "Failed to reset: AC97 link error\n");

        return -EIO;
}

static int ad1980_soc_probe(struct snd_soc_component *component)
{
        struct snd_ac97 *ac97;
        struct regmap *regmap;
        int ret;
        u16 vendor_id2;
        u16 ext_status;

        ac97 = snd_soc_new_ac97_component(component, 0, 0);
        if (IS_ERR(ac97)) {
                ret = PTR_ERR(ac97);
                dev_err(component->dev, "Failed to register AC97 component: %d\n", ret);
                return ret;
        }

        regmap = regmap_init_ac97(ac97, &ad1980_regmap_config);
        if (IS_ERR(regmap)) {
                ret = PTR_ERR(regmap);
                goto err_free_ac97;
        }

        snd_soc_component_init_regmap(component, regmap);
        snd_soc_component_set_drvdata(component, ac97);

        ret = ad1980_reset(component, 0);
        if (ret < 0)
                goto reset_err;

        vendor_id2 = snd_soc_component_read(component, AC97_VENDOR_ID2);
        if (vendor_id2 == 0x5374) {
                dev_warn(component->dev,
                        "Found AD1981 - only 2/2 IN/OUT Channels supported\n");
        }

        /* unmute captures and playbacks volume */
        snd_soc_component_write(component, AC97_MASTER, 0x0000);
        snd_soc_component_write(component, AC97_PCM, 0x0000);
        snd_soc_component_write(component, AC97_REC_GAIN, 0x0000);
        snd_soc_component_write(component, AC97_CENTER_LFE_MASTER, 0x0000);
        snd_soc_component_write(component, AC97_SURROUND_MASTER, 0x0000);

        /*power on LFE/CENTER/Surround DACs*/
        ext_status = snd_soc_component_read(component, AC97_EXTENDED_STATUS);
        snd_soc_component_write(component, AC97_EXTENDED_STATUS, ext_status&~0x3800);

        return 0;

reset_err:
        snd_soc_component_exit_regmap(component);
err_free_ac97:
        snd_soc_free_ac97_component(ac97);
        return ret;
}

static void ad1980_soc_remove(struct snd_soc_component *component)
{
        struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);

        snd_soc_component_exit_regmap(component);
        snd_soc_free_ac97_component(ac97);
}

static const struct snd_soc_component_driver soc_component_dev_ad1980 = {
        .probe                  = ad1980_soc_probe,
        .remove                 = ad1980_soc_remove,
        .controls               = ad1980_snd_ac97_controls,
        .num_controls           = ARRAY_SIZE(ad1980_snd_ac97_controls),
        .dapm_widgets           = ad1980_dapm_widgets,
        .num_dapm_widgets       = ARRAY_SIZE(ad1980_dapm_widgets),
        .dapm_routes            = ad1980_dapm_routes,
        .num_dapm_routes        = ARRAY_SIZE(ad1980_dapm_routes),
        .idle_bias_on           = 1,
        .use_pmdown_time        = 1,
        .endianness             = 1,
};

static int ad1980_probe(struct platform_device *pdev)
{
        return devm_snd_soc_register_component(&pdev->dev,
                        &soc_component_dev_ad1980, &ad1980_dai, 1);
}

static struct platform_driver ad1980_codec_driver = {
        .driver = {
                        .name = "ad1980",
        },

        .probe = ad1980_probe,
};

module_platform_driver(ad1980_codec_driver);

MODULE_DESCRIPTION("ASoC ad1980 driver (Obsolete)");
MODULE_AUTHOR("Roy Huang, Cliff Cai");
MODULE_LICENSE("GPL");