LXR linux/sound/soc/samsung/smdk

   1/*
   2 *  sound/soc/samsung/smdk_wm8994pcm.c
   3 *
   4 *  Copyright (c) 2011 Samsung Electronics Co., Ltd
   5 *              http://www.samsung.com
   6 *
   7 *  This program is free software; you can redistribute  it and/or  modify it
   8 *  under  the terms of  the GNU General  Public License as published by the
   9 *  Free Software Foundation;  either version 2 of the  License, or (at your
  10 *  option) any later version.
  11 */
  12#include <linux/module.h>
  13#include <sound/soc.h>
  14#include <sound/pcm.h>
  15#include <sound/pcm_params.h>
  16
  17#include "../codecs/wm8994.h"
  18#include "pcm.h"
  19
  20/*
  21 * Board Settings:
  22 *  o '1' means 'ON'
  23 *  o '0' means 'OFF'
  24 *  o 'X' means 'Don't care'
  25 *
  26 * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
  27 */
  28
  29/*
  30 * Configure audio route as :-
  31 * $ amixer sset 'DAC1' on,on
  32 * $ amixer sset 'Right Headphone Mux' 'DAC'
  33 * $ amixer sset 'Left Headphone Mux' 'DAC'
  34 * $ amixer sset 'DAC1R Mixer AIF1.1' on
  35 * $ amixer sset 'DAC1L Mixer AIF1.1' on
  36 * $ amixer sset 'IN2L' on
  37 * $ amixer sset 'IN2L PGA IN2LN' on
  38 * $ amixer sset 'MIXINL IN2L' on
  39 * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
  40 * $ amixer sset 'IN2R' on
  41 * $ amixer sset 'IN2R PGA IN2RN' on
  42 * $ amixer sset 'MIXINR IN2R' on
  43 * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
  44 */
  45
  46/* SMDK has a 16.9344MHZ crystal attached to WM8994 */
  47#define SMDK_WM8994_FREQ 16934400
  48
  49static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
  50                              struct snd_pcm_hw_params *params)
  51{
  52        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  53        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  54        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  55        unsigned long mclk_freq;
  56        int rfs, ret;
  57
  58        switch(params_rate(params)) {
  59        case 8000:
  60                rfs = 512;
  61                break;
  62        default:
  63                dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
  64                __func__, __LINE__, params_rate(params));
  65                return -EINVAL;
  66        }
  67
  68        mclk_freq = params_rate(params) * rfs;
  69
  70        ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
  71                                        mclk_freq, SND_SOC_CLOCK_IN);
  72        if (ret < 0)
  73                return ret;
  74
  75        ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
  76                                        SMDK_WM8994_FREQ, mclk_freq);
  77        if (ret < 0)
  78                return ret;
  79
  80        /* Set PCM source clock on CPU */
  81        ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
  82                                        mclk_freq, SND_SOC_CLOCK_IN);
  83        if (ret < 0)
  84                return ret;
  85
  86        /* Set SCLK_DIV for making bclk */
  87        ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
  88        if (ret < 0)
  89                return ret;
  90
  91        return 0;
  92}
  93
  94static struct snd_soc_ops smdk_wm8994_pcm_ops = {
  95        .hw_params = smdk_wm8994_pcm_hw_params,
  96};
  97
  98static struct snd_soc_dai_link smdk_dai[] = {
  99        {
 100                .name = "WM8994 PAIF PCM",
 101                .stream_name = "Primary PCM",
 102                .cpu_dai_name = "samsung-pcm.0",
 103                .codec_dai_name = "wm8994-aif1",
 104                .platform_name = "samsung-pcm.0",
 105                .codec_name = "wm8994-codec",
 106                .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
 107                           SND_SOC_DAIFMT_CBS_CFS,
 108                .ops = &smdk_wm8994_pcm_ops,
 109        },
 110};
 111
 112static struct snd_soc_card smdk_pcm = {
 113        .name = "SMDK-PCM",
 114        .owner = THIS_MODULE,
 115        .dai_link = smdk_dai,
 116        .num_links = 1,
 117};
 118
 119static int snd_smdk_probe(struct platform_device *pdev)
 120{
 121        int ret = 0;
 122
 123        smdk_pcm.dev = &pdev->dev;
 124        ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
 125        if (ret)
 126                dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
 127
 128        return ret;
 129}
 130
 131static struct platform_driver snd_smdk_driver = {
 132        .driver = {
 133                .name = "samsung-smdk-pcm",
 134        },
 135        .probe = snd_smdk_probe,
 136};
 137
 138module_platform_driver(snd_smdk_driver);
 139
 140MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
 141MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
 142MODULE_LICENSE("GPL");
 143