// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (c) 2011 Samsung Electronics Co., Ltd
//              http://www.samsung.com

#include <linux/module.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

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

/*
 * Board Settings:
 *  o '1' means 'ON'
 *  o '0' means 'OFF'
 *  o 'X' means 'Don't care'
 *
 * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
 */

/*
 * Configure audio route as :-
 * $ amixer sset 'DAC1' on,on
 * $ amixer sset 'Right Headphone Mux' 'DAC'
 * $ amixer sset 'Left Headphone Mux' 'DAC'
 * $ amixer sset 'DAC1R Mixer AIF1.1' on
 * $ amixer sset 'DAC1L Mixer AIF1.1' on
 * $ amixer sset 'IN2L' on
 * $ amixer sset 'IN2L PGA IN2LN' on
 * $ amixer sset 'MIXINL IN2L' on
 * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
 * $ amixer sset 'IN2R' on
 * $ amixer sset 'IN2R PGA IN2RN' on
 * $ amixer sset 'MIXINR IN2R' on
 * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
 */

/* SMDK has a 16.9344MHZ crystal attached to WM8994 */
#define SMDK_WM8994_FREQ 16934400

static int smdk_wm8994_pcm_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);
        struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
        unsigned long mclk_freq;
        int rfs, ret;

        switch(params_rate(params)) {
        case 8000:
                rfs = 512;
                break;
        default:
                dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
                __func__, __LINE__, params_rate(params));
                return -EINVAL;
        }

        mclk_freq = params_rate(params) * rfs;

        ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
                                        mclk_freq, SND_SOC_CLOCK_IN);
        if (ret < 0)
                return ret;

        ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
                                        SMDK_WM8994_FREQ, mclk_freq);
        if (ret < 0)
                return ret;

        /* Set PCM source clock on CPU */
        ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
                                        mclk_freq, SND_SOC_CLOCK_IN);
        if (ret < 0)
                return ret;

        /* Set SCLK_DIV for making bclk */
        ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
        if (ret < 0)
                return ret;

        return 0;
}

static const struct snd_soc_ops smdk_wm8994_pcm_ops = {
        .hw_params = smdk_wm8994_pcm_hw_params,
};

SND_SOC_DAILINK_DEFS(paif_pcm,
        DAILINK_COMP_ARRAY(COMP_CPU("samsung-pcm.0")),
        DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
        DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-pcm.0")));

static struct snd_soc_dai_link smdk_dai[] = {
        {
                .name = "WM8994 PAIF PCM",
                .stream_name = "Primary PCM",
                .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
                           SND_SOC_DAIFMT_CBC_CFC,
                .ops = &smdk_wm8994_pcm_ops,
                SND_SOC_DAILINK_REG(paif_pcm),
        },
};

static struct snd_soc_card smdk_pcm = {
        .name = "SMDK-PCM",
        .owner = THIS_MODULE,
        .dai_link = smdk_dai,
        .num_links = 1,
};

static int snd_smdk_probe(struct platform_device *pdev)
{
        int ret = 0;

        smdk_pcm.dev = &pdev->dev;
        ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
        if (ret)
                dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");

        return ret;
}

static struct platform_driver snd_smdk_driver = {
        .driver = {
                .name = "samsung-smdk-pcm",
        },
        .probe = snd_smdk_probe,
};

module_platform_driver(snd_smdk_driver);

MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
MODULE_LICENSE("GPL");