Logo Search packages:      
Sourcecode: alsa-driver version File versions

n810.c

/*
 * n810.c  --  SoC audio for Nokia N810
 *
 * Copyright (C) 2008 Nokia Corporation
 *
 * Contact: Jarkko Nikula <jhnikula@gmail.com>
 *
 * 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/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <linux/gpio.h>
#include <mach/mcbsp.h>

#include "omap-mcbsp.h"
#include "omap-pcm.h"
#include "../codecs/tlv320aic3x.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_codec *codec)
{
      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(codec, "Ext Spk");
      else
            snd_soc_dapm_disable_pin(codec, "Ext Spk");

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

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

      snd_soc_dapm_sync(codec);
}

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->socdev->card->codec;

      snd_pcm_hw_constraint_minmax(runtime,
                             SNDRV_PCM_HW_PARAM_CHANNELS, 2, 2);

      n810_ext_control(codec);
      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->dai->codec_dai;
      struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
      int err;

      /* Set codec DAI configuration */
      err = snd_soc_dai_set_fmt(codec_dai,
                               SND_SOC_DAIFMT_I2S |
                               SND_SOC_DAIFMT_NB_NF |
                               SND_SOC_DAIFMT_CBM_CFM);
      if (err < 0)
            return err;

      /* Set cpu DAI configuration */
      err = snd_soc_dai_set_fmt(cpu_dai,
                               SND_SOC_DAIFMT_I2S |
                               SND_SOC_DAIFMT_NB_NF |
                               SND_SOC_DAIFMT_CBM_CFM);
      if (err < 0)
            return 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_codec *codec =  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(codec);

      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_codec *codec =  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(codec);

      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_codec *codec =  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(codec);

      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_codec *codec)
{
      int err;

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

      /* Add N810 specific controls */
      err = snd_soc_add_controls(codec, aic33_n810_controls,
                        ARRAY_SIZE(aic33_n810_controls));
      if (err < 0)
            return err;

      /* Add N810 specific widgets */
      snd_soc_dapm_new_controls(codec, aic33_dapm_widgets,
                          ARRAY_SIZE(aic33_dapm_widgets));

      /* Set up N810 specific audio path audio_map */
      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

      snd_soc_dapm_sync(codec);

      return 0;
}

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link n810_dai = {
      .name = "TLV320AIC33",
      .stream_name = "AIC33",
      .cpu_dai = &omap_mcbsp_dai[0],
      .codec_dai = &aic3x_dai,
      .init = n810_aic33_init,
      .ops = &n810_ops,
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_n810 = {
      .name = "N810",
      .platform = &omap_soc_platform,
      .dai_link = &n810_dai,
      .num_links = 1,
};

/* Audio private data */
static struct aic3x_setup_data n810_aic33_setup = {
      .i2c_bus = 2,
      .i2c_address = 0x18,
      .gpio_func[0] = AIC3X_GPIO1_FUNC_DISABLED,
      .gpio_func[1] = AIC3X_GPIO2_FUNC_DIGITAL_MIC_INPUT,
};

/* Audio subsystem */
static struct snd_soc_device n810_snd_devdata = {
      .card = &snd_soc_n810,
      .codec_dev = &soc_codec_dev_aic3x,
      .codec_data = &n810_aic33_setup,
};

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, &n810_snd_devdata);
      n810_snd_devdata.dev = &n810_snd_device->dev;
      *(unsigned int *)n810_dai.cpu_dai->private_data = 1; /* McBSP2 */
      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);

      if (gpio_request(N810_HEADSET_AMP_GPIO, "hs_amp") < 0)
            BUG();
      if (gpio_request(N810_SPEAKER_AMP_GPIO, "spk_amp") < 0)
            BUG();
      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 <jhnikula@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC Nokia N810");
MODULE_LICENSE("GPL");

Generated by  Doxygen 1.6.0   Back to index