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neo1973_gta02_wm8753.c

/*
 * neo1973_gta02_wm8753.c  --  SoC audio for Openmoko Freerunner(GTA02)
 *
 * Copyright 2007 Openmoko Inc
 * Author: Graeme Gregory <graeme@openmoko.org>
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory <linux@wolfsonmicro.com>
 * Copyright 2009 Wolfson Microelectronics
 *
 *  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 <sound/soc-dapm.h>

#include <asm/mach-types.h>

#include <plat/regs-iis.h>

#include <mach/regs-clock.h>
#include <asm/io.h>
#include <mach/gta02.h>
#include "../codecs/wm8753.h"
#include "s3c-dma.h"
#include "s3c24xx-i2s.h"

static struct snd_soc_card neo1973_gta02;

static int neo1973_gta02_hifi_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;
      unsigned int pll_out = 0, bclk = 0;
      int ret = 0;
      unsigned long iis_clkrate;

      iis_clkrate = s3c24xx_i2s_get_clockrate();

      switch (params_rate(params)) {
      case 8000:
      case 16000:
            pll_out = 12288000;
            break;
      case 48000:
            bclk = WM8753_BCLK_DIV_4;
            pll_out = 12288000;
            break;
      case 96000:
            bclk = WM8753_BCLK_DIV_2;
            pll_out = 12288000;
            break;
      case 11025:
            bclk = WM8753_BCLK_DIV_16;
            pll_out = 11289600;
            break;
      case 22050:
            bclk = WM8753_BCLK_DIV_8;
            pll_out = 11289600;
            break;
      case 44100:
            bclk = WM8753_BCLK_DIV_4;
            pll_out = 11289600;
            break;
      case 88200:
            bclk = WM8753_BCLK_DIV_2;
            pll_out = 11289600;
            break;
      }

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

      /* set the codec system clock for DAC and ADC */
      ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
            SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      /* set MCLK division for sample rate */
      ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
            S3C2410_IISMOD_32FS);
      if (ret < 0)
            return ret;

      /* set codec BCLK division for sample rate */
      ret = snd_soc_dai_set_clkdiv(codec_dai,
                              WM8753_BCLKDIV, bclk);
      if (ret < 0)
            return ret;

      /* set prescaler division for sample rate */
      ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
            S3C24XX_PRESCALE(4, 4));
      if (ret < 0)
            return ret;

      /* codec PLL input is PCLK/4 */
      ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
            iis_clkrate / 4, pll_out);
      if (ret < 0)
            return ret;

      return 0;
}

static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;

      /* disable the PLL */
      return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
}

/*
 * Neo1973 WM8753 HiFi DAI opserations.
 */
static struct snd_soc_ops neo1973_gta02_hifi_ops = {
      .hw_params = neo1973_gta02_hifi_hw_params,
      .hw_free = neo1973_gta02_hifi_hw_free,
};

static int neo1973_gta02_voice_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;
      unsigned int pcmdiv = 0;
      int ret = 0;
      unsigned long iis_clkrate;

      iis_clkrate = s3c24xx_i2s_get_clockrate();

      if (params_rate(params) != 8000)
            return -EINVAL;
      if (params_channels(params) != 1)
            return -EINVAL;

      pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */

      /* todo: gg check mode (DSP_B) against CSR datasheet */
      /* set codec DAI configuration */
      ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
            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, WM8753_PCMCLK,
            12288000, SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      /* set codec PCM division for sample rate */
      ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
                              pcmdiv);
      if (ret < 0)
            return ret;

      /* configue and enable PLL for 12.288MHz output */
      ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
            iis_clkrate / 4, 12288000);
      if (ret < 0)
            return ret;

      return 0;
}

static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;

      /* disable the PLL */
      return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
}

static struct snd_soc_ops neo1973_gta02_voice_ops = {
      .hw_params = neo1973_gta02_voice_hw_params,
      .hw_free = neo1973_gta02_voice_hw_free,
};

#define LM4853_AMP 1
#define LM4853_SPK 2

static u8 lm4853_state;

/* This has no effect, it exists only to maintain compatibility with
 * existing ALSA state files.
 */
static int lm4853_set_state(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
      int val = ucontrol->value.integer.value[0];

      if (val)
            lm4853_state |= LM4853_AMP;
      else
            lm4853_state &= ~LM4853_AMP;

      return 0;
}

static int lm4853_get_state(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
      ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;

      return 0;
}

static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
      int val = ucontrol->value.integer.value[0];

      if (val) {
            lm4853_state |= LM4853_SPK;
            gpio_set_value(GTA02_GPIO_HP_IN, 0);
      } else {
            lm4853_state &= ~LM4853_SPK;
            gpio_set_value(GTA02_GPIO_HP_IN, 1);
      }

      return 0;
}

static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
      ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;

      return 0;
}

static int lm4853_event(struct snd_soc_dapm_widget *w,
                  struct snd_kcontrol *k,
                  int event)
{
      gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(value));

      return 0;
}

static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
      SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
      SND_SOC_DAPM_LINE("GSM Line Out", NULL),
      SND_SOC_DAPM_LINE("GSM Line In", NULL),
      SND_SOC_DAPM_MIC("Headset Mic", NULL),
      SND_SOC_DAPM_MIC("Handset Mic", NULL),
      SND_SOC_DAPM_SPK("Handset Spk", NULL),
};


/* example machine audio_mapnections */
static const struct snd_soc_dapm_route audio_map[] = {

      /* Connections to the lm4853 amp */
      {"Stereo Out", NULL, "LOUT1"},
      {"Stereo Out", NULL, "ROUT1"},

      /* Connections to the GSM Module */
      {"GSM Line Out", NULL, "MONO1"},
      {"GSM Line Out", NULL, "MONO2"},
      {"RXP", NULL, "GSM Line In"},
      {"RXN", NULL, "GSM Line In"},

      /* Connections to Headset */
      {"MIC1", NULL, "Mic Bias"},
      {"Mic Bias", NULL, "Headset Mic"},

      /* Call Mic */
      {"MIC2", NULL, "Mic Bias"},
      {"MIC2N", NULL, "Mic Bias"},
      {"Mic Bias", NULL, "Handset Mic"},

      /* Call Speaker */
      {"Handset Spk", NULL, "LOUT2"},
      {"Handset Spk", NULL, "ROUT2"},

      /* Connect the ALC pins */
      {"ACIN", NULL, "ACOP"},
};

static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
      SOC_DAPM_PIN_SWITCH("Stereo Out"),
      SOC_DAPM_PIN_SWITCH("GSM Line Out"),
      SOC_DAPM_PIN_SWITCH("GSM Line In"),
      SOC_DAPM_PIN_SWITCH("Headset Mic"),
      SOC_DAPM_PIN_SWITCH("Handset Mic"),
      SOC_DAPM_PIN_SWITCH("Handset Spk"),

      /* This has no effect, it exists only to maintain compatibility with
       * existing ALSA state files.
       */
      SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
            lm4853_get_state,
            lm4853_set_state),
      SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
            lm4853_get_spk,
            lm4853_set_spk),
};

/*
 * This is an example machine initialisation for a wm8753 connected to a
 * neo1973 GTA02.
 */
static int neo1973_gta02_wm8753_init(struct snd_soc_codec *codec)
{
      int err;

      /* set up NC codec pins */
      snd_soc_dapm_nc_pin(codec, "OUT3");
      snd_soc_dapm_nc_pin(codec, "OUT4");
      snd_soc_dapm_nc_pin(codec, "LINE1");
      snd_soc_dapm_nc_pin(codec, "LINE2");

      /* Add neo1973 gta02 specific widgets */
      snd_soc_dapm_new_controls(codec, wm8753_dapm_widgets,
                          ARRAY_SIZE(wm8753_dapm_widgets));

      /* add neo1973 gta02 specific controls */
      err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
            ARRAY_SIZE(wm8753_neo1973_gta02_controls));

      if (err < 0)
            return err;

      /* set up neo1973 gta02 specific audio path audio_map */
      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

      /* set endpoints to default off mode */
      snd_soc_dapm_disable_pin(codec, "Stereo Out");
      snd_soc_dapm_disable_pin(codec, "GSM Line Out");
      snd_soc_dapm_disable_pin(codec, "GSM Line In");
      snd_soc_dapm_disable_pin(codec, "Headset Mic");
      snd_soc_dapm_disable_pin(codec, "Handset Mic");
      snd_soc_dapm_disable_pin(codec, "Handset Spk");

      snd_soc_dapm_sync(codec);

      return 0;
}

/*
 * BT Codec DAI
 */
static struct snd_soc_dai bt_dai = {
      .name = "Bluetooth",
      .id = 0,
      .playback = {
            .channels_min = 1,
            .channels_max = 1,
            .rates = SNDRV_PCM_RATE_8000,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .capture = {
            .channels_min = 1,
            .channels_max = 1,
            .rates = SNDRV_PCM_RATE_8000,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
};

static struct snd_soc_dai_link neo1973_gta02_dai[] = {
{ /* Hifi Playback - for similatious use with voice below */
      .name = "WM8753",
      .stream_name = "WM8753 HiFi",
      .cpu_dai = &s3c24xx_i2s_dai,
      .codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
      .init = neo1973_gta02_wm8753_init,
      .ops = &neo1973_gta02_hifi_ops,
},
{ /* Voice via BT */
      .name = "Bluetooth",
      .stream_name = "Voice",
      .cpu_dai = &bt_dai,
      .codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
      .ops = &neo1973_gta02_voice_ops,
},
};

static struct snd_soc_card neo1973_gta02 = {
      .name = "neo1973-gta02",
      .platform = &s3c24xx_soc_platform,
      .dai_link = neo1973_gta02_dai,
      .num_links = ARRAY_SIZE(neo1973_gta02_dai),
};

static struct snd_soc_device neo1973_gta02_snd_devdata = {
      .card = &neo1973_gta02,
      .codec_dev = &soc_codec_dev_wm8753,
};

static struct platform_device *neo1973_gta02_snd_device;

static int __init neo1973_gta02_init(void)
{
      int ret;

      if (!machine_is_neo1973_gta02()) {
            printk(KERN_INFO
                   "Only GTA02 is supported by this ASoC driver\n");
            return -ENODEV;
      }

      /* register bluetooth DAI here */
      ret = snd_soc_register_dai(&bt_dai);
      if (ret)
            return ret;

      neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
      if (!neo1973_gta02_snd_device)
            return -ENOMEM;

      platform_set_drvdata(neo1973_gta02_snd_device,
                  &neo1973_gta02_snd_devdata);
      neo1973_gta02_snd_devdata.dev = &neo1973_gta02_snd_device->dev;
      ret = platform_device_add(neo1973_gta02_snd_device);

      if (ret) {
            platform_device_put(neo1973_gta02_snd_device);
            return ret;
      }

      /* Initialise GPIOs used by amp */
      ret = gpio_request(GTA02_GPIO_HP_IN, "GTA02_HP_IN");
      if (ret) {
            pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_HP_IN);
            goto err_unregister_device;
      }

      ret = gpio_direction_output(GTA02_GPIO_AMP_HP_IN, 1);
      if (ret) {
            pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_HP_IN);
            goto err_free_gpio_hp_in;
      }

      ret = gpio_request(GTA02_GPIO_AMP_SHUT, "GTA02_AMP_SHUT");
      if (ret) {
            pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_AMP_SHUT);
            goto err_free_gpio_hp_in;
      }

      ret = gpio_direction_output(GTA02_GPIO_AMP_SHUT, 1);
      if (ret) {
            pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_AMP_SHUT);
            goto err_free_gpio_amp_shut;
      }

      return 0;

err_free_gpio_amp_shut:
      gpio_free(GTA02_GPIO_AMP_SHUT);
err_free_gpio_hp_in:
      gpio_free(GTA02_GPIO_HP_IN);
err_unregister_device:
      platform_device_unregister(neo1973_gta02_snd_device);
      return ret;
}
module_init(neo1973_gta02_init);

static void __exit neo1973_gta02_exit(void)
{
      snd_soc_unregister_dai(&bt_dai);
      platform_device_unregister(neo1973_gta02_snd_device);
      gpio_free(GTA02_GPIO_HP_IN);
      gpio_free(GTA02_GPIO_AMP_SHUT);
}
module_exit(neo1973_gta02_exit);

/* Module information */
MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
MODULE_LICENSE("GPL");

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