pxa2xx-ac97.c

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/*
 * 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/io.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-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 __devinit pxa2xx_ac97_probe(struct snd_soc_dai *dai)
{
    return pxa2xx_ac97_hw_probe(to_platform_device(dai->dev));
}

static int pxa2xx_ac97_remove(struct snd_soc_dai *dai)
{
    pxa2xx_ac97_hw_remove(to_platform_device(dai->dev));
    return 0;
}

static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
                 struct snd_pcm_hw_params *params,
                 struct snd_soc_dai *cpu_dai)
{
    struct pxa2xx_pcm_dma_params *dma_data;

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

    snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);

    return 0;
}

static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
                     struct snd_pcm_hw_params *params,
                     struct snd_soc_dai *cpu_dai)
{
    struct pxa2xx_pcm_dma_params *dma_data;

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

    snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);

    return 0;
}

static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
                     struct snd_pcm_hw_params *params,
                     struct snd_soc_dai *cpu_dai)
{
    if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
        return -ENODEV;
    else
        snd_soc_dai_set_dma_data(cpu_dai, substream,
                     &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 const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
    .hw_params  = pxa2xx_ac97_hw_params,
};

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

static const 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.
 */
static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
{
    .name = "pxa2xx-ac97",
    .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",
    .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",
    .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(soc_ac97_ops);

static __devinit int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
{
    if (pdev->id != -1) {
        dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
        return -ENXIO;
    }

    /* 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(&pdev->dev, pxa_ac97_dai_driver,
            ARRAY_SIZE(pxa_ac97_dai_driver));
}

static int __devexit pxa2xx_ac97_dev_remove(struct platform_device *pdev)
{
    snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(pxa_ac97_dai_driver));
    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,
    },
};

module_platform_driver(pxa2xx_ac97_driver);

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