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