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jive_wm8750.c

/* sound/soc/s3c24xx/jive_wm8750.c
 *
 * Copyright 2007,2008 Simtec Electronics
 *
 * Based on sound/soc/pxa/spitz.c
 *    Copyright 2005 Wolfson Microelectronics PLC.
 *    Copyright 2005 Openedhand Ltd.
 *
 * 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/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/clk.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/mach-types.h>

#include "s3c24xx-pcm.h"
#include "s3c2412-i2s.h"

#include "../codecs/wm8750.h"

static const struct snd_soc_dapm_route audio_map[] = {
      { "Headphone Jack", NULL, "LOUT1" },
      { "Headphone Jack", NULL, "ROUT1" },
      { "Internal Speaker", NULL, "LOUT2" },
      { "Internal Speaker", NULL, "ROUT2" },
      { "LINPUT1", NULL, "Line Input" },
      { "RINPUT1", NULL, "Line Input" },
};

static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
      SND_SOC_DAPM_HP("Headphone Jack", NULL),
      SND_SOC_DAPM_SPK("Internal Speaker", NULL),
      SND_SOC_DAPM_LINE("Line In", NULL),
};

static int jive_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;
      struct s3c_i2sv2_rate_calc div;
      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;
      }

      s3c_i2sv2_iis_calc_rate(&div, NULL, params_rate(params),
                        s3c2412_get_iisclk());

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

      /* 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;

      ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_RCLK, div.fs_div);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_PRESCALER,
                             div.clk_div - 1);
      if (ret < 0)
            return ret;

      return 0;
}

static struct snd_soc_ops jive_ops = {
      .hw_params  = jive_hw_params,
};

static int jive_wm8750_init(struct snd_soc_codec *codec)
{
      int err;

      /* These endpoints are not being used. */
      snd_soc_dapm_nc_pin(codec, "LINPUT2");
      snd_soc_dapm_nc_pin(codec, "RINPUT2");
      snd_soc_dapm_nc_pin(codec, "LINPUT3");
      snd_soc_dapm_nc_pin(codec, "RINPUT3");
      snd_soc_dapm_nc_pin(codec, "OUT3");
      snd_soc_dapm_nc_pin(codec, "MONO");

      /* Add jive specific widgets */
      err = snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
                              ARRAY_SIZE(wm8750_dapm_widgets));
      if (err) {
            printk(KERN_ERR "%s: failed to add widgets (%d)\n",
                   __func__, err);
            return err;
      }

      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
      snd_soc_dapm_sync(codec);

      return 0;
}

static struct snd_soc_dai_link jive_dai = {
      .name       = "wm8750",
      .stream_name      = "WM8750",
      .cpu_dai    = &s3c2412_i2s_dai,
      .codec_dai  = &wm8750_dai,
      .init       = jive_wm8750_init,
      .ops        = &jive_ops,
};

/* jive audio machine driver */
static struct snd_soc_card snd_soc_machine_jive = {
      .name       = "Jive",
      .platform   = &s3c24xx_soc_platform,
      .dai_link   = &jive_dai,
      .num_links  = 1,
};

/* jive audio private data */
static struct wm8750_setup_data jive_wm8750_setup = {
};

/* jive audio subsystem */
static struct snd_soc_device jive_snd_devdata = {
      .card       = &snd_soc_machine_jive,
      .codec_dev  = &soc_codec_dev_wm8750,
      .codec_data = &jive_wm8750_setup,
};

static struct platform_device *jive_snd_device;

static int __init jive_init(void)
{
      int ret;

      if (!machine_is_jive())
            return 0;

      printk("JIVE WM8750 Audio support\n");

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

      platform_set_drvdata(jive_snd_device, &jive_snd_devdata);
      jive_snd_devdata.dev = &jive_snd_device->dev;
      ret = platform_device_add(jive_snd_device);

      if (ret)
            platform_device_put(jive_snd_device);

      return ret;
}

static void __exit jive_exit(void)
{
      platform_device_unregister(jive_snd_device);
}

module_init(jive_init);
module_exit(jive_exit);

MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("ALSA SoC Jive Audio support");
MODULE_LICENSE("GPL");

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