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Linux/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 '' 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");
143 

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