// SPDX-License-Identifier: GPL-2.0-only
/*
 *  bytcht_nocodec.c - ASoc Machine driver for MinnowBoard Max and Up
 *  to make I2S signals observable on the Low-Speed connector. Audio codec
 *  is not managed by ASoC/DAPM
 *
 *  Copyright (C) 2015-2017 Intel Corp
 *
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "../atom/sst-atom-controls.h"

static const struct snd_soc_dapm_widget widgets[] = {
        SND_SOC_DAPM_MIC("Mic", NULL),
        SND_SOC_DAPM_SPK("Speaker", NULL),
};

static const struct snd_kcontrol_new controls[] = {
        SOC_DAPM_PIN_SWITCH("Mic"),
        SOC_DAPM_PIN_SWITCH("Speaker"),
};

static const struct snd_soc_dapm_route audio_map[] = {
        {"ssp2 Tx", NULL, "codec_out0"},
        {"ssp2 Tx", NULL, "codec_out1"},
        {"codec_in0", NULL, "ssp2 Rx"},
        {"codec_in1", NULL, "ssp2 Rx"},

        {"ssp2 Rx", NULL, "Mic"},
        {"Speaker", NULL, "ssp2 Tx"},
};

static int codec_fixup(struct snd_soc_pcm_runtime *rtd,
                            struct snd_pcm_hw_params *params)
{
        struct snd_interval *rate = hw_param_interval(params,
                        SNDRV_PCM_HW_PARAM_RATE);
        struct snd_interval *channels = hw_param_interval(params,
                                                SNDRV_PCM_HW_PARAM_CHANNELS);
        int ret;

        /* The DSP will convert the FE rate to 48k, stereo, 24bits */
        rate->min = rate->max = 48000;
        channels->min = channels->max = 2;

        /* set SSP2 to 24-bit */
        params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);

        /*
         * Default mode for SSP configuration is TDM 4 slot, override config
         * with explicit setting to I2S 2ch 24-bit. The word length is set with
         * dai_set_tdm_slot() since there is no other API exposed
         */
        ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0),
                                  SND_SOC_DAIFMT_I2S     |
                                  SND_SOC_DAIFMT_NB_NF   |
                                  SND_SOC_DAIFMT_BP_FP);

        if (ret < 0) {
                dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret);
                return ret;
        }

        ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), 0x3, 0x3, 2, 24);
        if (ret < 0) {
                dev_err(rtd->dev, "can't set I2S config, err %d\n", ret);
                return ret;
        }

        return 0;
}

static const unsigned int rates_48000[] = {
        48000,
};

static const struct snd_pcm_hw_constraint_list constraints_48000 = {
        .count = ARRAY_SIZE(rates_48000),
        .list  = rates_48000,
};

static int aif1_startup(struct snd_pcm_substream *substream)
{
        return snd_pcm_hw_constraint_list(substream->runtime, 0,
                        SNDRV_PCM_HW_PARAM_RATE,
                        &constraints_48000);
}

static const struct snd_soc_ops aif1_ops = {
        .startup = aif1_startup,
};

SND_SOC_DAILINK_DEF(dummy,
        DAILINK_COMP_ARRAY(COMP_DUMMY()));

SND_SOC_DAILINK_DEF(media,
        DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));

SND_SOC_DAILINK_DEF(deepbuffer,
        DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));

SND_SOC_DAILINK_DEF(ssp2_port,
        DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));

SND_SOC_DAILINK_DEF(platform,
        DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));

static struct snd_soc_dai_link dais[] = {
        [MERR_DPCM_AUDIO] = {
                .name = "Audio Port",
                .stream_name = "Audio",
                .ignore_suspend = 1,
                .nonatomic = true,
                .dynamic = 1,
                .ops = &aif1_ops,
                SND_SOC_DAILINK_REG(media, dummy, platform),
        },
        [MERR_DPCM_DEEP_BUFFER] = {
                .name = "Deep-Buffer Audio Port",
                .stream_name = "Deep-Buffer Audio",
                .ignore_suspend = 1,
                .nonatomic = true,
                .dynamic = 1,
                .playback_only = 1,
                .ops = &aif1_ops,
                SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
        },
        /* CODEC<->CODEC link */
        /* back ends */
        {
                .name = "SSP2-LowSpeed Connector",
                .id = 0,
                .no_pcm = 1,
                .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
                                                | SND_SOC_DAIFMT_CBC_CFC,
                .be_hw_params_fixup = codec_fixup,
                .ignore_suspend = 1,
                SND_SOC_DAILINK_REG(ssp2_port, dummy, platform),
        },
};

/* SoC card */
static struct snd_soc_card bytcht_nocodec_card = {
        .name = "bytcht-nocodec",
        .owner = THIS_MODULE,
        .dai_link = dais,
        .num_links = ARRAY_SIZE(dais),
        .dapm_widgets = widgets,
        .num_dapm_widgets = ARRAY_SIZE(widgets),
        .dapm_routes = audio_map,
        .num_dapm_routes = ARRAY_SIZE(audio_map),
        .controls = controls,
        .num_controls = ARRAY_SIZE(controls),
        .fully_routed = true,
};

static int snd_bytcht_nocodec_mc_probe(struct platform_device *pdev)
{
        int ret_val = 0;

        /* register the soc card */
        bytcht_nocodec_card.dev = &pdev->dev;

        ret_val = devm_snd_soc_register_card(&pdev->dev, &bytcht_nocodec_card);

        if (ret_val) {
                dev_err(&pdev->dev, "devm_snd_soc_register_card failed %d\n",
                        ret_val);
                return ret_val;
        }
        platform_set_drvdata(pdev, &bytcht_nocodec_card);
        return ret_val;
}

static struct platform_driver snd_bytcht_nocodec_mc_driver = {
        .driver = {
                .name = "bytcht_nocodec",
        },
        .probe = snd_bytcht_nocodec_mc_probe,
};
module_platform_driver(snd_bytcht_nocodec_mc_driver);

MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver");
MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:bytcht_nocodec");