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 '0' 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 	/* 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;
77 
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;
84 
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;
89 
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;
94 
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;
100 
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;
105 
106 	return 0;
107 }
108 
109 static struct snd_soc_ops smdk_wm8994_pcm_ops = {
110 	.hw_params = smdk_wm8994_pcm_hw_params,
111 };
112 
113 static struct snd_soc_dai_link smdk_dai[] = {
114 	{
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,
122 	},
123 };
124 
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,
130 };
131 
132 static int snd_smdk_probe(struct platform_device *pdev)
133 {
134 	int ret = 0;
135 
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);
140 
141 	return ret;
142 }
143 
144 static struct platform_driver snd_smdk_driver = {
145 	.driver = {
146 		.name = "samsung-smdk-pcm",
147 	},
148 	.probe = snd_smdk_probe,
149 };
150 
151 module_platform_driver(snd_smdk_driver);
152 
153 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
154 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
155 MODULE_LICENSE("GPL");
156