spitz.c

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/*
 * spitz.c  --  SoC audio for Sharp SL-Cxx00 models Spitz, Borzoi and Akita
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Copyright 2005 Openedhand Ltd.
 *
 * Authors: Liam Girdwood <[email protected]>
 *          Richard Purdie <[email protected]>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include <asm/mach-types.h>
#include <mach/spitz.h>
#include "../codecs/wm8750.h"
#include "pxa2xx-i2s.h"

#define SPITZ_HP        0
#define SPITZ_MIC       1
#define SPITZ_LINE      2
#define SPITZ_HEADSET   3
#define SPITZ_HP_OFF    4
#define SPITZ_SPK_ON    0
#define SPITZ_SPK_OFF   1

 /* audio clock in Hz - rounded from 12.235MHz */
#define SPITZ_AUDIO_CLOCK 12288000

static int spitz_jack_func;
static int spitz_spk_func;
static int spitz_mic_gpio;

static void spitz_ext_control(struct snd_soc_dapm_context *dapm)
{
    if (spitz_spk_func == SPITZ_SPK_ON)
        snd_soc_dapm_enable_pin(dapm, "Ext Spk");
    else
        snd_soc_dapm_disable_pin(dapm, "Ext Spk");

    /* set up jack connection */
    switch (spitz_jack_func) {
    case SPITZ_HP:
        /* enable and unmute hp jack, disable mic bias */
        snd_soc_dapm_disable_pin(dapm, "Headset Jack");
        snd_soc_dapm_disable_pin(dapm, "Mic Jack");
        snd_soc_dapm_disable_pin(dapm, "Line Jack");
        snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
        gpio_set_value(SPITZ_GPIO_MUTE_L, 1);
        gpio_set_value(SPITZ_GPIO_MUTE_R, 1);
        break;
    case SPITZ_MIC:
        /* enable mic jack and bias, mute hp */
        snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
        snd_soc_dapm_disable_pin(dapm, "Headset Jack");
        snd_soc_dapm_disable_pin(dapm, "Line Jack");
        snd_soc_dapm_enable_pin(dapm, "Mic Jack");
        gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
        gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
        break;
    case SPITZ_LINE:
        /* enable line jack, disable mic bias and mute hp */
        snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
        snd_soc_dapm_disable_pin(dapm, "Headset Jack");
        snd_soc_dapm_disable_pin(dapm, "Mic Jack");
        snd_soc_dapm_enable_pin(dapm, "Line Jack");
        gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
        gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
        break;
    case SPITZ_HEADSET:
        /* enable and unmute headset jack enable mic bias, mute L hp */
        snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
        snd_soc_dapm_enable_pin(dapm, "Mic Jack");
        snd_soc_dapm_disable_pin(dapm, "Line Jack");
        snd_soc_dapm_enable_pin(dapm, "Headset Jack");
        gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
        gpio_set_value(SPITZ_GPIO_MUTE_R, 1);
        break;
    case SPITZ_HP_OFF:

        /* jack removed, everything off */
        snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
        snd_soc_dapm_disable_pin(dapm, "Headset Jack");
        snd_soc_dapm_disable_pin(dapm, "Mic Jack");
        snd_soc_dapm_disable_pin(dapm, "Line Jack");
        gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
        gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
        break;
    }
    snd_soc_dapm_sync(dapm);
}

static int spitz_startup(struct snd_pcm_substream *substream)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_codec *codec = rtd->codec;

    mutex_lock(&codec->mutex);

    /* check the jack status at stream startup */
    spitz_ext_control(&codec->dapm);

    mutex_unlock(&codec->mutex);

    return 0;
}

static int spitz_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;
    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;
    }

    /* 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;

    /* set the I2S system clock as input (unused) */
    ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
        SND_SOC_CLOCK_IN);
    if (ret < 0)
        return ret;

    return 0;
}

static struct snd_soc_ops spitz_ops = {
    .startup = spitz_startup,
    .hw_params = spitz_hw_params,
};

static int spitz_get_jack(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = spitz_jack_func;
    return 0;
}

static int spitz_set_jack(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

    if (spitz_jack_func == ucontrol->value.integer.value[0])
        return 0;

    spitz_jack_func = ucontrol->value.integer.value[0];
    spitz_ext_control(&card->dapm);
    return 1;
}

static int spitz_get_spk(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = spitz_spk_func;
    return 0;
}

static int spitz_set_spk(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

    if (spitz_spk_func == ucontrol->value.integer.value[0])
        return 0;

    spitz_spk_func = ucontrol->value.integer.value[0];
    spitz_ext_control(&card->dapm);
    return 1;
}

static int spitz_mic_bias(struct snd_soc_dapm_widget *w,
    struct snd_kcontrol *k, int event)
{
    gpio_set_value_cansleep(spitz_mic_gpio, SND_SOC_DAPM_EVENT_ON(event));
    return 0;
}

/* spitz machine dapm widgets */
static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
    SND_SOC_DAPM_HP("Headphone Jack", NULL),
    SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias),
    SND_SOC_DAPM_SPK("Ext Spk", NULL),
    SND_SOC_DAPM_LINE("Line Jack", NULL),

    /* headset is a mic and mono headphone */
    SND_SOC_DAPM_HP("Headset Jack", NULL),
};

/* Spitz machine audio_map */
static const struct snd_soc_dapm_route spitz_audio_map[] = {

    /* headphone connected to LOUT1, ROUT1 */
    {"Headphone Jack", NULL, "LOUT1"},
    {"Headphone Jack", NULL, "ROUT1"},

    /* headset connected to ROUT1 and LINPUT1 with bias (def below) */
    {"Headset Jack", NULL, "ROUT1"},

    /* ext speaker connected to LOUT2, ROUT2  */
    {"Ext Spk", NULL , "ROUT2"},
    {"Ext Spk", NULL , "LOUT2"},

    /* mic is connected to input 1 - with bias */
    {"LINPUT1", NULL, "Mic Bias"},
    {"Mic Bias", NULL, "Mic Jack"},

    /* line is connected to input 1 - no bias */
    {"LINPUT1", NULL, "Line Jack"},
};

static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
    "Off"};
static const char *spk_function[] = {"On", "Off"};
static const struct soc_enum spitz_enum[] = {
    SOC_ENUM_SINGLE_EXT(5, jack_function),
    SOC_ENUM_SINGLE_EXT(2, spk_function),
};

static const struct snd_kcontrol_new wm8750_spitz_controls[] = {
    SOC_ENUM_EXT("Jack Function", spitz_enum[0], spitz_get_jack,
        spitz_set_jack),
    SOC_ENUM_EXT("Speaker Function", spitz_enum[1], spitz_get_spk,
        spitz_set_spk),
};

/*
 * Logic for a wm8750 as connected on a Sharp SL-Cxx00 Device
 */
static int spitz_wm8750_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    /* NC codec pins */
    snd_soc_dapm_nc_pin(dapm, "RINPUT1");
    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, "MONO1");

    return 0;
}

/* spitz digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link spitz_dai = {
    .name = "wm8750",
    .stream_name = "WM8750",
    .cpu_dai_name = "pxa2xx-i2s",
    .codec_dai_name = "wm8750-hifi",
    .platform_name = "pxa-pcm-audio",
    .codec_name = "wm8750.0-001b",
    .init = spitz_wm8750_init,
    .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
           SND_SOC_DAIFMT_CBS_CFS,
    .ops = &spitz_ops,
};

/* spitz audio machine driver */
static struct snd_soc_card snd_soc_spitz = {
    .name = "Spitz",
    .owner = THIS_MODULE,
    .dai_link = &spitz_dai,
    .num_links = 1,

    .controls = wm8750_spitz_controls,
    .num_controls = ARRAY_SIZE(wm8750_spitz_controls),
    .dapm_widgets = wm8750_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
    .dapm_routes = spitz_audio_map,
    .num_dapm_routes = ARRAY_SIZE(spitz_audio_map),
};

static struct platform_device *spitz_snd_device;

static int __init spitz_init(void)
{
    int ret;

    if (!(machine_is_spitz() || machine_is_borzoi() || machine_is_akita()))
        return -ENODEV;

    if (machine_is_borzoi() || machine_is_spitz())
        spitz_mic_gpio = SPITZ_GPIO_MIC_BIAS;
    else
        spitz_mic_gpio = AKITA_GPIO_MIC_BIAS;

    ret = gpio_request(spitz_mic_gpio, "MIC GPIO");
    if (ret)
        goto err1;

    ret = gpio_direction_output(spitz_mic_gpio, 0);
    if (ret)
        goto err2;

    spitz_snd_device = platform_device_alloc("soc-audio", -1);
    if (!spitz_snd_device) {
        ret = -ENOMEM;
        goto err2;
    }

    platform_set_drvdata(spitz_snd_device, &snd_soc_spitz);

    ret = platform_device_add(spitz_snd_device);
    if (ret)
        goto err3;

    return 0;

err3:
    platform_device_put(spitz_snd_device);
err2:
    gpio_free(spitz_mic_gpio);
err1:
    return ret;
}

static void __exit spitz_exit(void)
{
    platform_device_unregister(spitz_snd_device);
    gpio_free(spitz_mic_gpio);
}

module_init(spitz_init);
module_exit(spitz_exit);

MODULE_AUTHOR("Richard Purdie");
MODULE_DESCRIPTION("ALSA SoC Spitz");
MODULE_LICENSE("GPL");