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 <sound/soc.h>
  13 #include <sound/pcm.h>
  14 #include <sound/pcm_params.h>
  15
  16 #include "../codecs/wm8994.h"
  17 #include "dma.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         /* Set the codec DAI configuration */
  71         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B
  72                                 | SND_SOC_DAIFMT_IB_NF
  73                                 | SND_SOC_DAIFMT_CBS_CFS);
  74         if (ret < 0)
  75                 return ret;
  76
  77         /* Set the cpu DAI configuration */
  78         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_B
  79                                 | SND_SOC_DAIFMT_IB_NF
  80                                 | SND_SOC_DAIFMT_CBS_CFS);
  81         if (ret < 0)
  82                 return ret;
  83
  84         ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
  85                                         mclk_freq, SND_SOC_CLOCK_IN);
  86         if (ret < 0)
  87                 return ret;
  88
  89         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
  90                                         SMDK_WM8994_FREQ, mclk_freq);
  91         if (ret < 0)
  92                 return ret;
  93
  94         /* Set PCM source clock on CPU */
  95         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
  96                                         mclk_freq, SND_SOC_CLOCK_IN);
  97         if (ret < 0)
  98                 return ret;
  99
 100         /* Set SCLK_DIV for making bclk */
 101         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
 102         if (ret < 0)
 103                 return ret;
 104
 105         return 0;
 106 }
 107
 108 static struct snd_soc_ops smdk_wm8994_pcm_ops = {
 109         .hw_params = smdk_wm8994_pcm_hw_params,
 110 };
 111
 112 static struct snd_soc_dai_link smdk_dai[] = {
 113         {
 114                 .name = "WM8994 PAIF PCM",
 115                 .stream_name = "Primary PCM",
 116                 .cpu_dai_name = "samsung-pcm.0",
 117                 .codec_dai_name = "wm8994-aif1",
 118                 .platform_name = "samsung-audio",
 119                 .codec_name = "wm8994-codec",
 120                 .ops = &smdk_wm8994_pcm_ops,
 121         },
 122 };
 123
 124 static struct snd_soc_card smdk_pcm = {
 125         .name = "SMDK-PCM",
 126         .dai_link = smdk_dai,
 127         .num_links = 1,
 128 };
 129
 130 static int __devinit snd_smdk_probe(struct platform_device *pdev)
 131 {
 132         int ret = 0;
 133
 134         smdk_pcm.dev = &pdev->dev;
 135         ret = snd_soc_register_card(&smdk_pcm);
 136         if (ret) {
 137                 dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
 138                 return ret;
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int __devexit snd_smdk_remove(struct platform_device *pdev)
 145 {
 146         snd_soc_unregister_card(&smdk_pcm);
 147         platform_set_drvdata(pdev, NULL);
 148         return 0;
 149 }
 150
 151 static struct platform_driver snd_smdk_driver = {
 152         .driver = {
 153                 .owner = THIS_MODULE,
 154                 .name = "samsung-smdk-pcm",
 155         },
 156         .probe = snd_smdk_probe,
 157         .remove = __devexit_p(snd_smdk_remove),
 158 };
 159
 160 static int __init smdk_audio_init(void)
 161 {
 162         return platform_driver_register(&snd_smdk_driver);
 163 }
 164
 165 module_init(smdk_audio_init);
 166
 167 static void __exit smdk_audio_exit(void)
 168 {
 169         platform_driver_unregister(&snd_smdk_driver);
 170 }
 171
 172 module_exit(smdk_audio_exit);
 173
 174 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
 175 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
 176 MODULE_LICENSE("GPL");