sound/soc/samsung/smdk_wm8994pcm.c

   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
  49 static 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
  94 static struct snd_soc_ops smdk_wm8994_pcm_ops = {
  95         .hw_params = smdk_wm8994_pcm_hw_params,
  96 };
  97
  98 static 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
 112 static 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
 119 static 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
 131 static struct platform_driver snd_smdk_driver = {
 132         .driver = {
 133                 .name = "samsung-smdk-pcm",
 134         },
 135         .probe = snd_smdk_probe,
 136 };
 137
 138 module_platform_driver(snd_smdk_driver);
 139
 140 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
 141 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
 142 MODULE_LICENSE("GPL");