// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (c) 2014, Insignal Co., Ltd.
//
//  Author: Claude <claude@insginal.co.kr>

#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/clk.h>

#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#include "../codecs/wm8994.h"
#include "i2s.h"

static int arndale_rt5631_hw_params(struct snd_pcm_substream *substream,
                                    struct snd_pcm_hw_params *params)
{
        struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
        struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
        struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
        int rfs, ret;
        unsigned long rclk;

        rfs = 256;

        rclk = params_rate(params) * rfs;

        ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
                                        0, SND_SOC_CLOCK_OUT);
        if (ret < 0)
                return ret;

        ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
                                        0, SND_SOC_CLOCK_OUT);

        if (ret < 0)
                return ret;

        ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_OUT);
        if (ret < 0)
                return ret;

        return 0;
}

static const struct snd_soc_ops arndale_rt5631_ops = {
        .hw_params = arndale_rt5631_hw_params,
};

static int arndale_wm1811_hw_params(struct snd_pcm_substream *substream,
                                    struct snd_pcm_hw_params *params)
{
        struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
        struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
        unsigned int rfs, rclk;

        /* Ensure AIF1CLK is >= 3 MHz for optimal performance */
        if (params_width(params) == 24)
                rfs = 384;
        else if (params_rate(params) == 8000 || params_rate(params) == 11025)
                rfs = 512;
        else
                rfs = 256;

        rclk = params_rate(params) * rfs;

        /*
         * We add 1 to the frequency value to ensure proper EPLL setting
         * for each audio sampling rate (see epll_24mhz_tbl in drivers/clk/
         * samsung/clk-exynos5250.c for list of available EPLL rates).
         * The CODEC uses clk API and the value will be rounded hence the MCLK1
         * clock's frequency will still be exact multiple of the sample rate.
         */
        return snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK1,
                                        rclk + 1, SND_SOC_CLOCK_IN);
}

static const struct snd_soc_ops arndale_wm1811_ops = {
        .hw_params = arndale_wm1811_hw_params,
};

SND_SOC_DAILINK_DEFS(rt5631_hifi,
        DAILINK_COMP_ARRAY(COMP_EMPTY()),
        DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "rt5631-aif1")),
        DAILINK_COMP_ARRAY(COMP_EMPTY()));

static struct snd_soc_dai_link arndale_rt5631_dai[] = {
        {
                .name = "RT5631 HiFi",
                .stream_name = "Primary",
                .dai_fmt = SND_SOC_DAIFMT_I2S
                        | SND_SOC_DAIFMT_NB_NF
                        | SND_SOC_DAIFMT_CBC_CFC,
                .ops = &arndale_rt5631_ops,
                SND_SOC_DAILINK_REG(rt5631_hifi),
        },
};

SND_SOC_DAILINK_DEFS(wm1811_hifi,
        DAILINK_COMP_ARRAY(COMP_EMPTY()),
        DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),
        DAILINK_COMP_ARRAY(COMP_EMPTY()));

static struct snd_soc_dai_link arndale_wm1811_dai[] = {
        {
                .name = "WM1811 HiFi",
                .stream_name = "Primary",
                .dai_fmt = SND_SOC_DAIFMT_I2S
                        | SND_SOC_DAIFMT_NB_NF
                        | SND_SOC_DAIFMT_CBP_CFP,
                .ops = &arndale_wm1811_ops,
                SND_SOC_DAILINK_REG(wm1811_hifi),
        },
};

static struct snd_soc_card arndale_rt5631 = {
        .name = "Arndale RT5631",
        .owner = THIS_MODULE,
        .dai_link = arndale_rt5631_dai,
        .num_links = ARRAY_SIZE(arndale_rt5631_dai),
};

static struct snd_soc_card arndale_wm1811 = {
        .name = "Arndale WM1811",
        .owner = THIS_MODULE,
        .dai_link = arndale_wm1811_dai,
        .num_links = ARRAY_SIZE(arndale_wm1811_dai),
};

static void arndale_put_of_nodes(struct snd_soc_card *card)
{
        struct snd_soc_dai_link *dai_link;
        int i;

        for_each_card_prelinks(card, i, dai_link) {
                of_node_put(dai_link->cpus->of_node);
                of_node_put(dai_link->codecs->of_node);
        }
}

static int arndale_audio_probe(struct platform_device *pdev)
{
        struct device_node *np = pdev->dev.of_node;
        struct snd_soc_card *card;
        struct snd_soc_dai_link *dai_link;
        int ret;

        card = (struct snd_soc_card *)of_device_get_match_data(&pdev->dev);
        card->dev = &pdev->dev;
        dai_link = card->dai_link;

        dai_link->cpus->of_node = of_parse_phandle(np, "samsung,audio-cpu", 0);
        if (!dai_link->cpus->of_node) {
                dev_err(&pdev->dev,
                        "Property 'samsung,audio-cpu' missing or invalid\n");
                return -EINVAL;
        }

        if (!dai_link->platforms->name)
                dai_link->platforms->of_node = dai_link->cpus->of_node;

        dai_link->codecs->of_node = of_parse_phandle(np, "samsung,audio-codec", 0);
        if (!dai_link->codecs->of_node) {
                dev_err(&pdev->dev,
                        "Property 'samsung,audio-codec' missing or invalid\n");
                ret = -EINVAL;
                goto err_put_of_nodes;
        }

        ret = devm_snd_soc_register_card(card->dev, card);
        if (ret) {
                dev_err_probe(&pdev->dev, ret,
                              "snd_soc_register_card() failed\n");
                goto err_put_of_nodes;
        }
        return 0;

err_put_of_nodes:
        arndale_put_of_nodes(card);
        return ret;
}

static void arndale_audio_remove(struct platform_device *pdev)
{
        struct snd_soc_card *card = platform_get_drvdata(pdev);

        arndale_put_of_nodes(card);
}

static const struct of_device_id arndale_audio_of_match[] = {
        { .compatible = "samsung,arndale-rt5631",  .data = &arndale_rt5631 },
        { .compatible = "samsung,arndale-alc5631", .data = &arndale_rt5631 },
        { .compatible = "samsung,arndale-wm1811",  .data = &arndale_wm1811 },
        {},
};
MODULE_DEVICE_TABLE(of, arndale_audio_of_match);

static struct platform_driver arndale_audio_driver = {
        .driver = {
                .name = "arndale-audio",
                .pm = &snd_soc_pm_ops,
                .of_match_table = arndale_audio_of_match,
        },
        .probe = arndale_audio_probe,
        .remove = arndale_audio_remove,
};

module_platform_driver(arndale_audio_driver);

MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
MODULE_LICENSE("GPL");