/*********************************************************************
 * pcm5100.c  --   ASoC Driver for TI PCM5100 codecs
 *
 * Author: Kevin Li <kevin-ke.li@broadcom.com>
 * 
 * Copyright (c) 2018 Broadcom Corporation
 * All Rights Reserved
 *
 * <:label-BRCM:2018:DUAL/GPL:standard
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as published by
 * the Free Software Foundation (the "GPL").
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * 
 * A copy of the GPL is available at http://www.broadcom.com/licenses/GPLv2.php, or by
 * writing to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 * 
 * :>
 **********************************************************************/

#include <linux/of.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#define DRV_NAME "brcm-pcm5100"

#define STUB_RATES	SNDRV_PCM_RATE_8000_192000
/* Based on the PCM5102a datasheet, change the format and rate parameter limits. The rate define is actually OK as is, but the formats need to be limited to S16LE, S24LE and S32LE.*/
#define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \
                         SNDRV_PCM_FMTBIT_S24_LE | \
                         SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_codec_driver soc_codec_pcm5100 = {
};

static int pcm5100_dai_startup(struct snd_pcm_substream *substream,
                               struct snd_soc_dai *dai)
{
   return 0;
}
static int pcm5100_hw_params(struct snd_pcm_substream *substream,
                             struct snd_pcm_hw_params *params,
                             struct snd_soc_dai *dai)
{
   return 0;
}

static int pcm5100_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
   return 0;
}

static const struct snd_soc_dai_ops pcm5100_dai_ops = 
{
   .startup   = pcm5100_dai_startup,
   .hw_params = pcm5100_hw_params,
   .set_fmt   = pcm5100_set_fmt,
};

static struct snd_soc_dai_driver pcm5100_dai = 
{
   .name             = "pcm5100-hifi",
   .playback         = 
   {
      .stream_name   = "Playback",
      .channels_min  = 2,
      .channels_max  = 2,
      .rates         = STUB_RATES,
      .formats       = STUB_FORMATS,
   },
   .ops = &pcm5100_dai_ops,
};

static int pcm5100_probe(struct platform_device *pdev)
{
   return snd_soc_register_codec(&pdev->dev, &soc_codec_pcm5100, &pcm5100_dai, 1);
}

static int pcm5100_remove(struct platform_device *pdev)
{
   snd_soc_unregister_codec(&pdev->dev);
   return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id snd_soc_bcm_audio_match[] = 
{
   { .compatible   = "ti,pcm5100-dac" },
   { }
};
#endif

static struct platform_driver pcm5100_driver = 
{
   .probe             = pcm5100_probe,
   .remove            = pcm5100_remove,
   .driver            = 
   {
      .name           = "pcm5100",
      .of_match_table = of_match_ptr(snd_soc_bcm_audio_match),
   },
};

module_platform_driver(pcm5100_driver);

MODULE_AUTHOR("Kevin Li <kevin-ke.li@broadcom.com>");
MODULE_DESCRIPTION("BCM PCM5100 codec driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);