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pxa2xx-ac97.c

/*
 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
 *
 * Author:  Nicolas Pitre
 * Created: Dec 02, 2004
 * Copyright:     MontaVista Software Inc.
 *
 * 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.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include <sound/core.h>
#include <sound/ac97_codec.h>
#include <sound/soc.h>
#include <sound/pxa2xx-lib.h>

#include <mach/hardware.h>
#include <mach/regs-ac97.h>
#include <mach/dma.h>
#include <mach/audio.h>

#include "pxa2xx-pcm.h"
#include "pxa2xx-ac97.h"

static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
{
      pxa2xx_ac97_try_warm_reset(ac97);

      pxa2xx_ac97_finish_reset(ac97);
}

static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
{
      pxa2xx_ac97_try_cold_reset(ac97);

      pxa2xx_ac97_finish_reset(ac97);
}

struct snd_ac97_bus_ops soc_ac97_ops = {
      .read = pxa2xx_ac97_read,
      .write      = pxa2xx_ac97_write,
      .warm_reset = pxa2xx_ac97_warm_reset,
      .reset      = pxa2xx_ac97_cold_reset,
};

static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_out = {
      .name             = "AC97 PCM Stereo out",
      .dev_addr         = __PREG(PCDR),
      .drcmr                  = &DRCMR(12),
      .dcmd             = DCMD_INCSRCADDR | DCMD_FLOWTRG |
                          DCMD_BURST32 | DCMD_WIDTH4,
};

static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_in = {
      .name             = "AC97 PCM Stereo in",
      .dev_addr         = __PREG(PCDR),
      .drcmr                  = &DRCMR(11),
      .dcmd             = DCMD_INCTRGADDR | DCMD_FLOWSRC |
                          DCMD_BURST32 | DCMD_WIDTH4,
};

static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_out = {
      .name             = "AC97 Aux PCM (Slot 5) Mono out",
      .dev_addr         = __PREG(MODR),
      .drcmr                  = &DRCMR(10),
      .dcmd             = DCMD_INCSRCADDR | DCMD_FLOWTRG |
                          DCMD_BURST16 | DCMD_WIDTH2,
};

static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_in = {
      .name             = "AC97 Aux PCM (Slot 5) Mono in",
      .dev_addr         = __PREG(MODR),
      .drcmr                  = &DRCMR(9),
      .dcmd             = DCMD_INCTRGADDR | DCMD_FLOWSRC |
                          DCMD_BURST16 | DCMD_WIDTH2,
};

static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_mic_mono_in = {
      .name             = "AC97 Mic PCM (Slot 6) Mono in",
      .dev_addr         = __PREG(MCDR),
      .drcmr                  = &DRCMR(8),
      .dcmd             = DCMD_INCTRGADDR | DCMD_FLOWSRC |
                          DCMD_BURST16 | DCMD_WIDTH2,
};

#ifdef CONFIG_PM
static int pxa2xx_ac97_suspend(struct snd_soc_dai *dai)
{
      return pxa2xx_ac97_hw_suspend();
}

static int pxa2xx_ac97_resume(struct snd_soc_dai *dai)
{
      return pxa2xx_ac97_hw_resume();
}

#else
#define pxa2xx_ac97_suspend   NULL
#define pxa2xx_ac97_resume    NULL
#endif

static int pxa2xx_ac97_probe(struct platform_device *pdev,
                       struct snd_soc_dai *dai)
{
      return pxa2xx_ac97_hw_probe(to_platform_device(dai->dev));
}

static void pxa2xx_ac97_remove(struct platform_device *pdev,
                         struct snd_soc_dai *dai)
{
      pxa2xx_ac97_hw_remove(to_platform_device(dai->dev));
}

static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
                         struct snd_pcm_hw_params *params,
                         struct snd_soc_dai *dai)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

      if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
            cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_out;
      else
            cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_in;

      return 0;
}

static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
                             struct snd_pcm_hw_params *params,
                             struct snd_soc_dai *dai)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

      if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
            cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
      else
            cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_in;

      return 0;
}

static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
                             struct snd_pcm_hw_params *params,
                             struct snd_soc_dai *dai)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

      if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
            return -ENODEV;
      else
            cpu_dai->dma_data = &pxa2xx_ac97_pcm_mic_mono_in;

      return 0;
}

#define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
            SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
            SNDRV_PCM_RATE_48000)

static struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
      .hw_params  = pxa2xx_ac97_hw_params,
};

static struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
      .hw_params  = pxa2xx_ac97_hw_aux_params,
};

static struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
      .hw_params  = pxa2xx_ac97_hw_mic_params,
};

/*
 * There is only 1 physical AC97 interface for pxa2xx, but it
 * has extra fifo's that can be used for aux DACs and ADCs.
 */
struct snd_soc_dai pxa_ac97_dai[] = {
{
      .name = "pxa2xx-ac97",
      .id = 0,
      .ac97_control = 1,
      .probe = pxa2xx_ac97_probe,
      .remove = pxa2xx_ac97_remove,
      .suspend = pxa2xx_ac97_suspend,
      .resume = pxa2xx_ac97_resume,
      .playback = {
            .stream_name = "AC97 Playback",
            .channels_min = 2,
            .channels_max = 2,
            .rates = PXA2XX_AC97_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .capture = {
            .stream_name = "AC97 Capture",
            .channels_min = 2,
            .channels_max = 2,
            .rates = PXA2XX_AC97_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .ops = &pxa_ac97_hifi_dai_ops,
},
{
      .name = "pxa2xx-ac97-aux",
      .id = 1,
      .ac97_control = 1,
      .playback = {
            .stream_name = "AC97 Aux Playback",
            .channels_min = 1,
            .channels_max = 1,
            .rates = PXA2XX_AC97_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .capture = {
            .stream_name = "AC97 Aux Capture",
            .channels_min = 1,
            .channels_max = 1,
            .rates = PXA2XX_AC97_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .ops = &pxa_ac97_aux_dai_ops,
},
{
      .name = "pxa2xx-ac97-mic",
      .id = 2,
      .ac97_control = 1,
      .capture = {
            .stream_name = "AC97 Mic Capture",
            .channels_min = 1,
            .channels_max = 1,
            .rates = PXA2XX_AC97_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .ops = &pxa_ac97_mic_dai_ops,
},
};

EXPORT_SYMBOL_GPL(pxa_ac97_dai);
EXPORT_SYMBOL_GPL(soc_ac97_ops);

static int __devinit pxa2xx_ac97_dev_probe(struct platform_device *pdev)
{
      int i;
      pxa2xx_audio_ops_t *pdata = pdev->dev.platform_data;

      if (pdev->id >= 0) {
            dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
            return -ENXIO;
      }

      for (i = 0; i < ARRAY_SIZE(pxa_ac97_dai); i++) {
            pxa_ac97_dai[i].dev = &pdev->dev;
            if (pdata && pdata->codec_pdata[0])
                  pxa_ac97_dai[i].ac97_pdata = pdata->codec_pdata[0];
      }

      /* Punt most of the init to the SoC probe; we may need the machine
       * driver to do interesting things with the clocking to get us up
       * and running.
       */
      return snd_soc_register_dais(pxa_ac97_dai, ARRAY_SIZE(pxa_ac97_dai));
}

static int __devexit pxa2xx_ac97_dev_remove(struct platform_device *pdev)
{
      snd_soc_unregister_dais(pxa_ac97_dai, ARRAY_SIZE(pxa_ac97_dai));

      return 0;
}

static struct platform_driver pxa2xx_ac97_driver = {
      .probe            = pxa2xx_ac97_dev_probe,
      .remove           = __devexit_p(pxa2xx_ac97_dev_remove),
      .driver           = {
            .name = "pxa2xx-ac97",
            .owner      = THIS_MODULE,
      },
};

static int __init pxa_ac97_init(void)
{
      return platform_driver_register(&pxa2xx_ac97_driver);
}
module_init(pxa_ac97_init);

static void __exit pxa_ac97_exit(void)
{
      platform_driver_unregister(&pxa2xx_ac97_driver);
}
module_exit(pxa_ac97_exit);

MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
MODULE_LICENSE("GPL");

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