staging: ozwpan: Add module parameter description
[linux/fpc-iii.git] / sound / soc / samsung / smdk_wm8994pcm.c
blobb6c09979be1f77120888c017e6ba2e7362c1ef2d
1 /*
2 * sound/soc/samsung/smdk_wm8994pcm.c
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
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.
12 #include <linux/module.h>
13 #include <sound/soc.h>
14 #include <sound/pcm.h>
15 #include <sound/pcm_params.h>
17 #include "../codecs/wm8994.h"
18 #include "dma.h"
19 #include "pcm.h"
22 * Board Settings:
23 * o '1' means 'ON'
24 * o '0' means 'OFF'
25 * o 'X' means 'Don't care'
27 * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
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
47 /* SMDK has a 16.9344MHZ crystal attached to WM8994 */
48 #define SMDK_WM8994_FREQ 16934400
50 static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
51 struct snd_pcm_hw_params *params)
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;
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;
69 mclk_freq = params_rate(params) * rfs;
71 /* Set the codec DAI configuration */
72 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B
73 | SND_SOC_DAIFMT_IB_NF
74 | SND_SOC_DAIFMT_CBS_CFS);
75 if (ret < 0)
76 return ret;
78 /* Set the cpu DAI configuration */
79 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_B
80 | SND_SOC_DAIFMT_IB_NF
81 | SND_SOC_DAIFMT_CBS_CFS);
82 if (ret < 0)
83 return ret;
85 ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
86 mclk_freq, SND_SOC_CLOCK_IN);
87 if (ret < 0)
88 return ret;
90 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
91 SMDK_WM8994_FREQ, mclk_freq);
92 if (ret < 0)
93 return ret;
95 /* Set PCM source clock on CPU */
96 ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
97 mclk_freq, SND_SOC_CLOCK_IN);
98 if (ret < 0)
99 return ret;
101 /* Set SCLK_DIV for making bclk */
102 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
103 if (ret < 0)
104 return ret;
106 return 0;
109 static struct snd_soc_ops smdk_wm8994_pcm_ops = {
110 .hw_params = smdk_wm8994_pcm_hw_params,
113 static struct snd_soc_dai_link smdk_dai[] = {
115 .name = "WM8994 PAIF PCM",
116 .stream_name = "Primary PCM",
117 .cpu_dai_name = "samsung-pcm.0",
118 .codec_dai_name = "wm8994-aif1",
119 .platform_name = "samsung-pcm.0",
120 .codec_name = "wm8994-codec",
121 .ops = &smdk_wm8994_pcm_ops,
125 static struct snd_soc_card smdk_pcm = {
126 .name = "SMDK-PCM",
127 .owner = THIS_MODULE,
128 .dai_link = smdk_dai,
129 .num_links = 1,
132 static int snd_smdk_probe(struct platform_device *pdev)
134 int ret = 0;
136 smdk_pcm.dev = &pdev->dev;
137 ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
138 if (ret)
139 dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
141 return ret;
144 static struct platform_driver snd_smdk_driver = {
145 .driver = {
146 .owner = THIS_MODULE,
147 .name = "samsung-smdk-pcm",
149 .probe = snd_smdk_probe,
152 module_platform_driver(snd_smdk_driver);
154 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
155 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
156 MODULE_LICENSE("GPL");