saarb.c

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/*
 * saarb.c -- SoC audio for saarb
 *
 * Copyright (C) 2010 Marvell International Ltd.
 *  Haojian Zhuang <[email protected]>
 *
 * 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 <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>

#include <asm/mach-types.h>

#include "../codecs/88pm860x-codec.h"
#include "pxa-ssp.h"

static int saarb_pm860x_init(struct snd_soc_pcm_runtime *rtd);

static struct platform_device *saarb_snd_device;

static struct snd_soc_jack hs_jack, mic_jack;

static struct snd_soc_jack_pin hs_jack_pins[] = {
    { .pin = "Headset Stereophone", .mask = SND_JACK_HEADPHONE, },
};

static struct snd_soc_jack_pin mic_jack_pins[] = {
    { .pin = "Headset Mic 2",   .mask = SND_JACK_MICROPHONE, },
};

/* saarb machine dapm widgets */
static const struct snd_soc_dapm_widget saarb_dapm_widgets[] = {
    SND_SOC_DAPM_HP("Headphone Stereophone", NULL),
    SND_SOC_DAPM_LINE("Lineout Out 1", NULL),
    SND_SOC_DAPM_LINE("Lineout Out 2", NULL),
    SND_SOC_DAPM_SPK("Ext Speaker", NULL),
    SND_SOC_DAPM_MIC("Ext Mic 1", NULL),
    SND_SOC_DAPM_MIC("Headset Mic", NULL),
    SND_SOC_DAPM_MIC("Ext Mic 3", NULL),
};

/* saarb machine audio map */
static const struct snd_soc_dapm_route saarb_audio_map[] = {
    {"Headset Stereophone", NULL, "HS1"},
    {"Headset Stereophone", NULL, "HS2"},

    {"Ext Speaker", NULL, "LSP"},
    {"Ext Speaker", NULL, "LSN"},

    {"Lineout Out 1", NULL, "LINEOUT1"},
    {"Lineout Out 2", NULL, "LINEOUT2"},

    {"MIC1P", NULL, "Mic1 Bias"},
    {"MIC1N", NULL, "Mic1 Bias"},
    {"Mic1 Bias", NULL, "Ext Mic 1"},

    {"MIC2P", NULL, "Mic1 Bias"},
    {"MIC2N", NULL, "Mic1 Bias"},
    {"Mic1 Bias", NULL, "Headset Mic 2"},

    {"MIC3P", NULL, "Mic3 Bias"},
    {"MIC3N", NULL, "Mic3 Bias"},
    {"Mic3 Bias", NULL, "Ext Mic 3"},
};

static int saarb_i2s_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;
    int width = snd_pcm_format_physical_width(params_format(params));
    int ret;

    ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_NET_PLL, 0,
                     PM860X_CLK_DIR_OUT);
    if (ret < 0)
        return ret;

    ret = snd_soc_dai_set_sysclk(codec_dai, 0, 0, PM860X_CLK_DIR_OUT);
    if (ret < 0)
        return ret;

    ret = snd_soc_dai_set_tdm_slot(cpu_dai, 3, 3, 2, width);

    return ret;
}

static struct snd_soc_ops saarb_i2s_ops = {
    .hw_params  = saarb_i2s_hw_params,
};

static struct snd_soc_dai_link saarb_dai[] = {
    {
        .name       = "88PM860x I2S",
        .stream_name    = "I2S Audio",
        .cpu_dai_name   = "pxa-ssp-dai.1",
        .codec_dai_name = "88pm860x-i2s",
        .platform_name  = "pxa-pcm-audio",
        .codec_name = "88pm860x-codec",
        .init       = saarb_pm860x_init,
        .dai_fmt    = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                  SND_SOC_DAIFMT_CBM_CFM,
        .ops        = &saarb_i2s_ops,
    },
};

static struct snd_soc_card snd_soc_card_saarb = {
    .name = "Saarb",
    .owner = THIS_MODULE,
    .dai_link = saarb_dai,
    .num_links = ARRAY_SIZE(saarb_dai),

    .dapm_widgets = saarb_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(saarb_dapm_widgets),
    .dapm_routes = saarb_audio_map,
    .num_dapm_routes = ARRAY_SIZE(saarb_audio_map),
};

static int saarb_pm860x_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    /* connected pins */
    snd_soc_dapm_enable_pin(dapm, "Ext Speaker");
    snd_soc_dapm_enable_pin(dapm, "Ext Mic 1");
    snd_soc_dapm_enable_pin(dapm, "Ext Mic 3");
    snd_soc_dapm_disable_pin(dapm, "Headset Mic 2");
    snd_soc_dapm_disable_pin(dapm, "Headset Stereophone");

    /* Headset jack detection */
    snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE
            | SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2,
            &hs_jack);
    snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
                  hs_jack_pins);
    snd_soc_jack_new(codec, "Microphone Jack", SND_JACK_MICROPHONE,
             &mic_jack);
    snd_soc_jack_add_pins(&mic_jack, ARRAY_SIZE(mic_jack_pins),
                  mic_jack_pins);

    /* headphone, microphone detection & headset short detection */
    pm860x_hs_jack_detect(codec, &hs_jack, SND_JACK_HEADPHONE,
                  SND_JACK_BTN_0, SND_JACK_BTN_1, SND_JACK_BTN_2);
    pm860x_mic_jack_detect(codec, &hs_jack, SND_JACK_MICROPHONE);
    return 0;
}

static int __init saarb_init(void)
{
    int ret;

    if (!machine_is_saarb())
        return -ENODEV;
    saarb_snd_device = platform_device_alloc("soc-audio", -1);
    if (!saarb_snd_device)
        return -ENOMEM;

    platform_set_drvdata(saarb_snd_device, &snd_soc_card_saarb);

    ret = platform_device_add(saarb_snd_device);
    if (ret)
        platform_device_put(saarb_snd_device);

    return ret;
}

static void __exit saarb_exit(void)
{
    platform_device_unregister(saarb_snd_device);
}

module_init(saarb_init);
module_exit(saarb_exit);

MODULE_AUTHOR("Haojian Zhuang <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC 88PM860x Saarb");
MODULE_LICENSE("GPL");