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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 "dma.h"
 19 #include "pcm.h"
 20 
 21 /*
 22  * Board Settings:
 23  *  o '1' means 'ON'
 24  *  o '' 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");
144 

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