jive_wm8750.c

Go to the documentation of this file.

/* sound/soc/samsung/jive_wm8750.c
 *
 * Copyright 2007,2008 Simtec Electronics
 *
 * Based on sound/soc/pxa/spitz.c
 *  Copyright 2005 Wolfson Microelectronics PLC.
 *  Copyright 2005 Openedhand Ltd.
 *
 * 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/module.h>
#include <sound/soc.h>

#include <asm/mach-types.h>

#include "s3c2412-i2s.h"
#include "../codecs/wm8750.h"

static const struct snd_soc_dapm_route audio_map[] = {
    { "Headphone Jack", NULL, "LOUT1" },
    { "Headphone Jack", NULL, "ROUT1" },
    { "Internal Speaker", NULL, "LOUT2" },
    { "Internal Speaker", NULL, "ROUT2" },
    { "LINPUT1", NULL, "Line Input" },
    { "RINPUT1", NULL, "Line Input" },
};

static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
    SND_SOC_DAPM_HP("Headphone Jack", NULL),
    SND_SOC_DAPM_SPK("Internal Speaker", NULL),
    SND_SOC_DAPM_LINE("Line In", NULL),
};

static int jive_hw_params(struct snd_pcm_substream *substream,
              struct snd_pcm_hw_params *params)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_dai *codec_dai = rtd->codec_dai;
    struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
    struct s3c_i2sv2_rate_calc div;
    unsigned int clk = 0;
    int ret = 0;

    switch (params_rate(params)) {
    case 8000:
    case 16000:
    case 48000:
    case 96000:
        clk = 12288000;
        break;
    case 11025:
    case 22050:
    case 44100:
        clk = 11289600;
        break;
    }

    s3c_i2sv2_iis_calc_rate(&div, NULL, params_rate(params),
                s3c_i2sv2_get_clock(cpu_dai));

    /* set codec DAI configuration */
    ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
                  SND_SOC_DAIFMT_NB_NF |
                  SND_SOC_DAIFMT_CBS_CFS);
    if (ret < 0)
        return ret;

    /* set cpu DAI configuration */
    ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
                  SND_SOC_DAIFMT_NB_NF |
                  SND_SOC_DAIFMT_CBS_CFS);
    if (ret < 0)
        return ret;

    /* set the codec system clock for DAC and ADC */
    ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
                     SND_SOC_CLOCK_IN);
    if (ret < 0)
        return ret;

    ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_RCLK, div.fs_div);
    if (ret < 0)
        return ret;

    ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_PRESCALER,
                     div.clk_div - 1);
    if (ret < 0)
        return ret;

    return 0;
}

static struct snd_soc_ops jive_ops = {
    .hw_params  = jive_hw_params,
};

static int jive_wm8750_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    /* These endpoints are not being used. */
    snd_soc_dapm_nc_pin(dapm, "LINPUT2");
    snd_soc_dapm_nc_pin(dapm, "RINPUT2");
    snd_soc_dapm_nc_pin(dapm, "LINPUT3");
    snd_soc_dapm_nc_pin(dapm, "RINPUT3");
    snd_soc_dapm_nc_pin(dapm, "OUT3");
    snd_soc_dapm_nc_pin(dapm, "MONO");

    return 0;
}

static struct snd_soc_dai_link jive_dai = {
    .name       = "wm8750",
    .stream_name    = "WM8750",
    .cpu_dai_name   = "s3c2412-i2s",
    .codec_dai_name = "wm8750-hifi",
    .platform_name  = "samsung-audio",
    .codec_name = "wm8750.0-001a",
    .init       = jive_wm8750_init,
    .ops        = &jive_ops,
};

/* jive audio machine driver */
static struct snd_soc_card snd_soc_machine_jive = {
    .name       = "Jive",
    .owner      = THIS_MODULE,
    .dai_link   = &jive_dai,
    .num_links  = 1,

    .dapm_widgets   = wm8750_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
    .dapm_routes    = audio_map,
    .num_dapm_routes = ARRAY_SIZE(audio_map),
};

static struct platform_device *jive_snd_device;

static int __init jive_init(void)
{
    int ret;

    if (!machine_is_jive())
        return 0;

    printk("JIVE WM8750 Audio support\n");

    jive_snd_device = platform_device_alloc("soc-audio", -1);
    if (!jive_snd_device)
        return -ENOMEM;

    platform_set_drvdata(jive_snd_device, &snd_soc_machine_jive);
    ret = platform_device_add(jive_snd_device);

    if (ret)
        platform_device_put(jive_snd_device);

    return ret;
}

static void __exit jive_exit(void)
{
    platform_device_unregister(jive_snd_device);
}

module_init(jive_init);
module_exit(jive_exit);

MODULE_AUTHOR("Ben Dooks <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC Jive Audio support");
MODULE_LICENSE("GPL");