n810.c

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/*
 * n810.c  --  SoC audio for Nokia N810
 *
 * Copyright (C) 2008 Nokia Corporation
 *
 * Contact: Jarkko Nikula <[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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>

#include "omap-mcbsp.h"
#include "omap-pcm.h"

#define N810_HEADSET_AMP_GPIO   10
#define N810_SPEAKER_AMP_GPIO   101

enum {
    N810_JACK_DISABLED,
    N810_JACK_HP,
    N810_JACK_HS,
    N810_JACK_MIC,
};

static struct clk *sys_clkout2;
static struct clk *sys_clkout2_src;
static struct clk *func96m_clk;

static int n810_spk_func;
static int n810_jack_func;
static int n810_dmic_func;

static void n810_ext_control(struct snd_soc_dapm_context *dapm)
{
    int hp = 0, line1l = 0;

    switch (n810_jack_func) {
    case N810_JACK_HS:
        line1l = 1;
    case N810_JACK_HP:
        hp = 1;
        break;
    case N810_JACK_MIC:
        line1l = 1;
        break;
    }

    if (n810_spk_func)
        snd_soc_dapm_enable_pin(dapm, "Ext Spk");
    else
        snd_soc_dapm_disable_pin(dapm, "Ext Spk");

    if (hp)
        snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
    else
        snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
    if (line1l)
        snd_soc_dapm_enable_pin(dapm, "LINE1L");
    else
        snd_soc_dapm_disable_pin(dapm, "LINE1L");

    if (n810_dmic_func)
        snd_soc_dapm_enable_pin(dapm, "DMic");
    else
        snd_soc_dapm_disable_pin(dapm, "DMic");

    snd_soc_dapm_sync(dapm);
}

static int n810_startup(struct snd_pcm_substream *substream)
{
    struct snd_pcm_runtime *runtime = substream->runtime;
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_codec *codec = rtd->codec;

    snd_pcm_hw_constraint_minmax(runtime,
                     SNDRV_PCM_HW_PARAM_CHANNELS, 2, 2);

    n810_ext_control(&codec->dapm);
    return clk_enable(sys_clkout2);
}

static void n810_shutdown(struct snd_pcm_substream *substream)
{
    clk_disable(sys_clkout2);
}

static int n810_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;
    int err;

    /* Set the codec system clock for DAC and ADC */
    err = snd_soc_dai_set_sysclk(codec_dai, 0, 12000000,
                        SND_SOC_CLOCK_IN);

    return err;
}

static struct snd_soc_ops n810_ops = {
    .startup = n810_startup,
    .hw_params = n810_hw_params,
    .shutdown = n810_shutdown,
};

static int n810_get_spk(struct snd_kcontrol *kcontrol,
            struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = n810_spk_func;

    return 0;
}

static int n810_set_spk(struct snd_kcontrol *kcontrol,
            struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);

    if (n810_spk_func == ucontrol->value.integer.value[0])
        return 0;

    n810_spk_func = ucontrol->value.integer.value[0];
    n810_ext_control(&card->dapm);

    return 1;
}

static int n810_get_jack(struct snd_kcontrol *kcontrol,
             struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = n810_jack_func;

    return 0;
}

static int n810_set_jack(struct snd_kcontrol *kcontrol,
             struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);

    if (n810_jack_func == ucontrol->value.integer.value[0])
        return 0;

    n810_jack_func = ucontrol->value.integer.value[0];
    n810_ext_control(&card->dapm);

    return 1;
}

static int n810_get_input(struct snd_kcontrol *kcontrol,
              struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = n810_dmic_func;

    return 0;
}

static int n810_set_input(struct snd_kcontrol *kcontrol,
              struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);

    if (n810_dmic_func == ucontrol->value.integer.value[0])
        return 0;

    n810_dmic_func = ucontrol->value.integer.value[0];
    n810_ext_control(&card->dapm);

    return 1;
}

static int n810_spk_event(struct snd_soc_dapm_widget *w,
              struct snd_kcontrol *k, int event)
{
    if (SND_SOC_DAPM_EVENT_ON(event))
        gpio_set_value(N810_SPEAKER_AMP_GPIO, 1);
    else
        gpio_set_value(N810_SPEAKER_AMP_GPIO, 0);

    return 0;
}

static int n810_jack_event(struct snd_soc_dapm_widget *w,
               struct snd_kcontrol *k, int event)
{
    if (SND_SOC_DAPM_EVENT_ON(event))
        gpio_set_value(N810_HEADSET_AMP_GPIO, 1);
    else
        gpio_set_value(N810_HEADSET_AMP_GPIO, 0);

    return 0;
}

static const struct snd_soc_dapm_widget aic33_dapm_widgets[] = {
    SND_SOC_DAPM_SPK("Ext Spk", n810_spk_event),
    SND_SOC_DAPM_HP("Headphone Jack", n810_jack_event),
    SND_SOC_DAPM_MIC("DMic", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
    {"Headphone Jack", NULL, "HPLOUT"},
    {"Headphone Jack", NULL, "HPROUT"},

    {"Ext Spk", NULL, "LLOUT"},
    {"Ext Spk", NULL, "RLOUT"},

    {"DMic Rate 64", NULL, "Mic Bias 2V"},
    {"Mic Bias 2V", NULL, "DMic"},
};

static const char *spk_function[] = {"Off", "On"};
static const char *jack_function[] = {"Off", "Headphone", "Headset", "Mic"};
static const char *input_function[] = {"ADC", "Digital Mic"};
static const struct soc_enum n810_enum[] = {
    SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(spk_function), spk_function),
    SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(jack_function), jack_function),
    SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(input_function), input_function),
};

static const struct snd_kcontrol_new aic33_n810_controls[] = {
    SOC_ENUM_EXT("Speaker Function", n810_enum[0],
             n810_get_spk, n810_set_spk),
    SOC_ENUM_EXT("Jack Function", n810_enum[1],
             n810_get_jack, n810_set_jack),
    SOC_ENUM_EXT("Input Select",  n810_enum[2],
             n810_get_input, n810_set_input),
};

static int n810_aic33_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    /* Not connected */
    snd_soc_dapm_nc_pin(dapm, "MONO_LOUT");
    snd_soc_dapm_nc_pin(dapm, "HPLCOM");
    snd_soc_dapm_nc_pin(dapm, "HPRCOM");
    snd_soc_dapm_nc_pin(dapm, "MIC3L");
    snd_soc_dapm_nc_pin(dapm, "MIC3R");
    snd_soc_dapm_nc_pin(dapm, "LINE1R");
    snd_soc_dapm_nc_pin(dapm, "LINE2L");
    snd_soc_dapm_nc_pin(dapm, "LINE2R");

    return 0;
}

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link n810_dai = {
    .name = "TLV320AIC33",
    .stream_name = "AIC33",
    .cpu_dai_name = "omap-mcbsp.2",
    .platform_name = "omap-pcm-audio",
    .codec_name = "tlv320aic3x-codec.2-0018",
    .codec_dai_name = "tlv320aic3x-hifi",
    .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
           SND_SOC_DAIFMT_CBM_CFM,
    .init = n810_aic33_init,
    .ops = &n810_ops,
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_n810 = {
    .name = "N810",
    .owner = THIS_MODULE,
    .dai_link = &n810_dai,
    .num_links = 1,

    .controls = aic33_n810_controls,
    .num_controls = ARRAY_SIZE(aic33_n810_controls),
    .dapm_widgets = aic33_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(aic33_dapm_widgets),
    .dapm_routes = audio_map,
    .num_dapm_routes = ARRAY_SIZE(audio_map),
};

static struct platform_device *n810_snd_device;

static int __init n810_soc_init(void)
{
    int err;
    struct device *dev;

    if (!(machine_is_nokia_n810() || machine_is_nokia_n810_wimax()))
        return -ENODEV;

    n810_snd_device = platform_device_alloc("soc-audio", -1);
    if (!n810_snd_device)
        return -ENOMEM;

    platform_set_drvdata(n810_snd_device, &snd_soc_n810);
    err = platform_device_add(n810_snd_device);
    if (err)
        goto err1;

    dev = &n810_snd_device->dev;

    sys_clkout2_src = clk_get(dev, "sys_clkout2_src");
    if (IS_ERR(sys_clkout2_src)) {
        dev_err(dev, "Could not get sys_clkout2_src clock\n");
        err = PTR_ERR(sys_clkout2_src);
        goto err2;
    }
    sys_clkout2 = clk_get(dev, "sys_clkout2");
    if (IS_ERR(sys_clkout2)) {
        dev_err(dev, "Could not get sys_clkout2\n");
        err = PTR_ERR(sys_clkout2);
        goto err3;
    }
    /*
     * Configure 12 MHz output on SYS_CLKOUT2. Therefore we must use
     * 96 MHz as its parent in order to get 12 MHz
     */
    func96m_clk = clk_get(dev, "func_96m_ck");
    if (IS_ERR(func96m_clk)) {
        dev_err(dev, "Could not get func 96M clock\n");
        err = PTR_ERR(func96m_clk);
        goto err4;
    }
    clk_set_parent(sys_clkout2_src, func96m_clk);
    clk_set_rate(sys_clkout2, 12000000);

    BUG_ON((gpio_request(N810_HEADSET_AMP_GPIO, "hs_amp") < 0) ||
           (gpio_request(N810_SPEAKER_AMP_GPIO, "spk_amp") < 0));

    gpio_direction_output(N810_HEADSET_AMP_GPIO, 0);
    gpio_direction_output(N810_SPEAKER_AMP_GPIO, 0);

    return 0;
err4:
    clk_put(sys_clkout2);
err3:
    clk_put(sys_clkout2_src);
err2:
    platform_device_del(n810_snd_device);
err1:
    platform_device_put(n810_snd_device);

    return err;
}

static void __exit n810_soc_exit(void)
{
    gpio_free(N810_SPEAKER_AMP_GPIO);
    gpio_free(N810_HEADSET_AMP_GPIO);
    clk_put(sys_clkout2_src);
    clk_put(sys_clkout2);
    clk_put(func96m_clk);

    platform_device_unregister(n810_snd_device);
}

module_init(n810_soc_init);
module_exit(n810_soc_exit);

MODULE_AUTHOR("Jarkko Nikula <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC Nokia N810");
MODULE_LICENSE("GPL");