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"
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
;
59 switch(params_rate(params
)) {
64 dev_err(cpu_dai
->dev
, "%s:%d Sampling Rate %u not supported!\n",
65 __func__
, __LINE__
, params_rate(params
));
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
);
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
);
85 ret
= snd_soc_dai_set_sysclk(codec_dai
, WM8994_SYSCLK_FLL1
,
86 mclk_freq
, SND_SOC_CLOCK_IN
);
90 ret
= snd_soc_dai_set_pll(codec_dai
, WM8994_FLL1
, WM8994_FLL_SRC_MCLK1
,
91 SMDK_WM8994_FREQ
, mclk_freq
);
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
);
101 /* Set SCLK_DIV for making bclk */
102 ret
= snd_soc_dai_set_clkdiv(cpu_dai
, S3C_PCM_SCLK_PER_FS
, rfs
);
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
= {
127 .owner
= THIS_MODULE
,
128 .dai_link
= smdk_dai
,
132 static int snd_smdk_probe(struct platform_device
*pdev
)
136 smdk_pcm
.dev
= &pdev
->dev
;
137 ret
= devm_snd_soc_register_card(&pdev
->dev
, &smdk_pcm
);
139 dev_err(&pdev
->dev
, "snd_soc_register_card failed %d\n", ret
);
144 static struct platform_driver snd_smdk_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");