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

smdk_wm8580.c

/*
 *  smdk_wm8580.c
 *
 *  Copyright (c) 2009 Samsung Electronics Co. Ltd
 *  Author: Jaswinder Singh <jassi.brar@samsung.com>
 *
 *  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 <sound/soc.h>
#include <sound/pcm_params.h>

#include <asm/mach-types.h>

#include "../codecs/wm8580.h"
#include "i2s.h"

/*
 * Default CFG switch settings to use this driver:
 *
 *   SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
 */

/* SMDK has a 12MHZ crystal attached to WM8580 */
#define SMDK_WM8580_FREQ 12000000

static int smdk_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 *cpu_dai = rtd->cpu_dai;
      struct snd_soc_dai *codec_dai = rtd->codec_dai;
      unsigned int pll_out;
      int bfs, rfs, ret;

      switch (params_format(params)) {
      case SNDRV_PCM_FORMAT_U8:
      case SNDRV_PCM_FORMAT_S8:
            bfs = 16;
            break;
      case SNDRV_PCM_FORMAT_U16_LE:
      case SNDRV_PCM_FORMAT_S16_LE:
            bfs = 32;
            break;
      default:
            return -EINVAL;
      }

      /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
       * This criterion can't be met if we request PLL output
       * as {8000x256, 64000x256, 11025x256}Hz.
       * As a wayout, we rather change rfs to a minimum value that
       * results in (params_rate(params) * rfs), and itself, acceptable
       * to both - the CODEC and the CPU.
       */
      switch (params_rate(params)) {
      case 16000:
      case 22050:
      case 32000:
      case 44100:
      case 48000:
      case 88200:
      case 96000:
            rfs = 256;
            break;
      case 64000:
            rfs = 384;
            break;
      case 8000:
      case 11025:
            rfs = 512;
            break;
      default:
            return -EINVAL;
      }
      pll_out = params_rate(params) * rfs;

      /* Set the 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 the AP 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 WM8580 to drive MCLK from its PLLA */
      ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
                              WM8580_CLKSRC_PLLA);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
                              SMDK_WM8580_FREQ, pll_out);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
                             pll_out, SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      return 0;
}

/*
 * SMDK WM8580 DAI operations.
 */
static struct snd_soc_ops smdk_ops = {
      .hw_params = smdk_hw_params,
};

/* SMDK Playback widgets */
static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
      SND_SOC_DAPM_HP("Front", NULL),
      SND_SOC_DAPM_HP("Center+Sub", NULL),
      SND_SOC_DAPM_HP("Rear", NULL),
};

/* SMDK Capture widgets */
static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
      SND_SOC_DAPM_MIC("MicIn", NULL),
      SND_SOC_DAPM_LINE("LineIn", NULL),
};

/* SMDK-PAIFTX connections */
static const struct snd_soc_dapm_route audio_map_tx[] = {
      /* MicIn feeds AINL */
      {"AINL", NULL, "MicIn"},

      /* LineIn feeds AINL/R */
      {"AINL", NULL, "LineIn"},
      {"AINR", NULL, "LineIn"},
};

/* SMDK-PAIFRX connections */
static const struct snd_soc_dapm_route audio_map_rx[] = {
      /* Front Left/Right are fed VOUT1L/R */
      {"Front", NULL, "VOUT1L"},
      {"Front", NULL, "VOUT1R"},

      /* Center/Sub are fed VOUT2L/R */
      {"Center+Sub", NULL, "VOUT2L"},
      {"Center+Sub", NULL, "VOUT2R"},

      /* Rear Left/Right are fed VOUT3L/R */
      {"Rear", NULL, "VOUT3L"},
      {"Rear", NULL, "VOUT3R"},
};

static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
{
      struct snd_soc_codec *codec = rtd->codec;
      struct snd_soc_dapm_context *dapm = &codec->dapm;

      /* Add smdk specific Capture widgets */
      snd_soc_dapm_new_controls(dapm, wm8580_dapm_widgets_cpt,
                          ARRAY_SIZE(wm8580_dapm_widgets_cpt));

      /* Set up PAIFTX audio path */
      snd_soc_dapm_add_routes(dapm, audio_map_tx, ARRAY_SIZE(audio_map_tx));

      /* Enabling the microphone requires the fitting of a 0R
       * resistor to connect the line from the microphone jack.
       */
      snd_soc_dapm_disable_pin(dapm, "MicIn");

      /* signal a DAPM event */
      snd_soc_dapm_sync(dapm);

      return 0;
}

static int smdk_wm8580_init_paifrx(struct snd_soc_pcm_runtime *rtd)
{
      struct snd_soc_codec *codec = rtd->codec;
      struct snd_soc_dapm_context *dapm = &codec->dapm;

      /* Add smdk specific Playback widgets */
      snd_soc_dapm_new_controls(dapm, wm8580_dapm_widgets_pbk,
                          ARRAY_SIZE(wm8580_dapm_widgets_pbk));

      /* Set up PAIFRX audio path */
      snd_soc_dapm_add_routes(dapm, audio_map_rx, ARRAY_SIZE(audio_map_rx));

      /* signal a DAPM event */
      snd_soc_dapm_sync(dapm);

      return 0;
}

enum {
      PRI_PLAYBACK = 0,
      PRI_CAPTURE,
      SEC_PLAYBACK,
};

static struct snd_soc_dai_link smdk_dai[] = {
      [PRI_PLAYBACK] = { /* Primary Playback i/f */
            .name = "WM8580 PAIF RX",
            .stream_name = "Playback",
            .cpu_dai_name = "samsung-i2s.0",
            .codec_dai_name = "wm8580-hifi-playback",
            .platform_name = "samsung-audio",
            .codec_name = "wm8580-codec.0-001b",
            .init = smdk_wm8580_init_paifrx,
            .ops = &smdk_ops,
      },
      [PRI_CAPTURE] = { /* Primary Capture i/f */
            .name = "WM8580 PAIF TX",
            .stream_name = "Capture",
            .cpu_dai_name = "samsung-i2s.0",
            .codec_dai_name = "wm8580-hifi-capture",
            .platform_name = "samsung-audio",
            .codec_name = "wm8580-codec.0-001b",
            .init = smdk_wm8580_init_paiftx,
            .ops = &smdk_ops,
      },
      [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
            .name = "Sec_FIFO TX",
            .stream_name = "Playback",
            .cpu_dai_name = "samsung-i2s.x",
            .codec_dai_name = "wm8580-hifi-playback",
            .platform_name = "samsung-audio",
            .codec_name = "wm8580-codec.0-001b",
            .init = smdk_wm8580_init_paifrx,
            .ops = &smdk_ops,
      },
};

static struct snd_soc_card smdk = {
      .name = "SMDK-I2S",
      .dai_link = smdk_dai,
      .num_links = 2,
};

static struct platform_device *smdk_snd_device;

static int __init smdk_audio_init(void)
{
      int ret;
      char *str;

      if (machine_is_smdkc100() || machine_is_smdk6442()
                  || machine_is_smdkv210() || machine_is_smdkc110()) {
            smdk.num_links = 3;
            /* Secondary is at offset SAMSUNG_I2S_SECOFF from Primary */
            str = (char *)smdk_dai[SEC_PLAYBACK].cpu_dai_name;
            str[strlen(str) - 1] = '0' + SAMSUNG_I2S_SECOFF;
      } else if (machine_is_smdk6410()) {
            str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
            str[strlen(str) - 1] = '2';
            str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
            str[strlen(str) - 1] = '2';
      }

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

      platform_set_drvdata(smdk_snd_device, &smdk);
      ret = platform_device_add(smdk_snd_device);

      if (ret)
            platform_device_put(smdk_snd_device);

      return ret;
}
module_init(smdk_audio_init);

static void __exit smdk_audio_exit(void)
{
      platform_device_unregister(smdk_snd_device);
}
module_exit(smdk_audio_exit);

MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
MODULE_LICENSE("GPL");

Generated by  Doxygen 1.6.0   Back to index