root/sound/soc/samsung/smdk_wm8994pcm.c

DEFINITIONS

1. smdk_wm8994_pcm_hw_params
2. snd_smdk_probe

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Copyright (c) 2011 Samsung Electronics Co., Ltd
   4 //              http://www.samsung.com
   5 
   6 #include <linux/module.h>
   7 #include <sound/soc.h>
   8 #include <sound/pcm.h>
   9 #include <sound/pcm_params.h>
  10 
  11 #include "../codecs/wm8994.h"
  12 #include "pcm.h"
  13 
  14 /*
  15  * Board Settings:
  16  *  o '1' means 'ON'
  17  *  o '0' means 'OFF'
  18  *  o 'X' means 'Don't care'
  19  *
  20  * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
  21  */
  22 
  23 /*
  24  * Configure audio route as :-
  25  * $ amixer sset 'DAC1' on,on
  26  * $ amixer sset 'Right Headphone Mux' 'DAC'
  27  * $ amixer sset 'Left Headphone Mux' 'DAC'
  28  * $ amixer sset 'DAC1R Mixer AIF1.1' on
  29  * $ amixer sset 'DAC1L Mixer AIF1.1' on
  30  * $ amixer sset 'IN2L' on
  31  * $ amixer sset 'IN2L PGA IN2LN' on
  32  * $ amixer sset 'MIXINL IN2L' on
  33  * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
  34  * $ amixer sset 'IN2R' on
  35  * $ amixer sset 'IN2R PGA IN2RN' on
  36  * $ amixer sset 'MIXINR IN2R' on
  37  * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
  38  */
  39 
  40 /* SMDK has a 16.9344MHZ crystal attached to WM8994 */
  41 #define SMDK_WM8994_FREQ 16934400
  42 
  43 static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
  44                               struct snd_pcm_hw_params *params)
  45 {
  46         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  47         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  48         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  49         unsigned long mclk_freq;
  50         int rfs, ret;
  51 
  52         switch(params_rate(params)) {
  53         case 8000:
  54                 rfs = 512;
  55                 break;
  56         default:
  57                 dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
  58                 __func__, __LINE__, params_rate(params));
  59                 return -EINVAL;
  60         }
  61 
  62         mclk_freq = params_rate(params) * rfs;
  63 
  64         ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
  65                                         mclk_freq, SND_SOC_CLOCK_IN);
  66         if (ret < 0)
  67                 return ret;
  68 
  69         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
  70                                         SMDK_WM8994_FREQ, mclk_freq);
  71         if (ret < 0)
  72                 return ret;
  73 
  74         /* Set PCM source clock on CPU */
  75         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
  76                                         mclk_freq, SND_SOC_CLOCK_IN);
  77         if (ret < 0)
  78                 return ret;
  79 
  80         /* Set SCLK_DIV for making bclk */
  81         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
  82         if (ret < 0)
  83                 return ret;
  84 
  85         return 0;
  86 }
  87 
  88 static struct snd_soc_ops smdk_wm8994_pcm_ops = {
  89         .hw_params = smdk_wm8994_pcm_hw_params,
  90 };
  91 
  92 SND_SOC_DAILINK_DEFS(paif_pcm,
  93         DAILINK_COMP_ARRAY(COMP_CPU("samsung-pcm.0")),
  94         DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
  95         DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-pcm.0")));
  96 
  97 static struct snd_soc_dai_link smdk_dai[] = {
  98         {
  99                 .name = "WM8994 PAIF PCM",
 100                 .stream_name = "Primary PCM",
 101                 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
 102                            SND_SOC_DAIFMT_CBS_CFS,
 103                 .ops = &smdk_wm8994_pcm_ops,
 104                 SND_SOC_DAILINK_REG(paif_pcm),
 105         },
 106 };
 107 
 108 static struct snd_soc_card smdk_pcm = {
 109         .name = "SMDK-PCM",
 110         .owner = THIS_MODULE,
 111         .dai_link = smdk_dai,
 112         .num_links = 1,
 113 };
 114 
 115 static int snd_smdk_probe(struct platform_device *pdev)
 116 {
 117         int ret = 0;
 118 
 119         smdk_pcm.dev = &pdev->dev;
 120         ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
 121         if (ret)
 122                 dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
 123 
 124         return ret;
 125 }
 126 
 127 static struct platform_driver snd_smdk_driver = {
 128         .driver = {
 129                 .name = "samsung-smdk-pcm",
 130         },
 131         .probe = snd_smdk_probe,
 132 };
 133 
 134 module_platform_driver(snd_smdk_driver);
 135 
 136 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
 137 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
 138 MODULE_LICENSE("GPL");