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b8eeee68 SK |
1 | /* |
2 | * sound/soc/samsung/smdk_wm8580pcm.c | |
3 | * | |
4 | * Copyright (c) 2011 Samsung Electronics Co. Ltd | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | */ | |
da155d5b | 11 | #include <linux/module.h> |
b8eeee68 SK |
12 | #include <sound/soc.h> |
13 | #include <sound/pcm_params.h> | |
14 | #include <sound/pcm.h> | |
15 | ||
16 | #include <asm/mach-types.h> | |
17 | ||
18 | #include "../codecs/wm8580.h" | |
b8eeee68 SK |
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 | * | |
3a549fbf | 27 | * SMDK6410 Base B/D: CFG1-0000, CFG2-1111 |
b8eeee68 SK |
28 | * SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000 |
29 | */ | |
30 | ||
31 | #define SMDK_WM8580_EXT_OSC 12000000 | |
32 | #define SMDK_WM8580_EXT_MCLK 4096000 | |
33 | #define SMDK_WM8580_EXT_VOICE 2048000 | |
34 | ||
35 | static unsigned long mclk_freq; | |
36 | static unsigned long xtal_freq; | |
37 | ||
38 | /* | |
39 | * If MCLK clock directly gets from XTAL, we don't have to use PLL | |
40 | * to make MCLK, but if XTAL clock source connects with other codec | |
41 | * pin (like XTI), we should have to set codec's PLL to make MCLK. | |
42 | * Because Samsung SoC does not support pcmcdclk output like I2S. | |
43 | */ | |
44 | ||
45 | static int smdk_wm8580_pcm_hw_params(struct snd_pcm_substream *substream, | |
46 | struct snd_pcm_hw_params *params) | |
47 | { | |
48 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
49 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
50 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
51 | int rfs, ret; | |
52 | ||
53 | switch (params_rate(params)) { | |
54 | case 8000: | |
55 | break; | |
56 | default: | |
57 | printk(KERN_ERR "%s:%d Sampling Rate %u not supported!\n", | |
58 | __func__, __LINE__, params_rate(params)); | |
59 | return -EINVAL; | |
60 | } | |
61 | ||
62 | rfs = mclk_freq / params_rate(params) / 2; | |
63 | ||
b8eeee68 SK |
64 | if (mclk_freq == xtal_freq) { |
65 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK, | |
66 | mclk_freq, SND_SOC_CLOCK_IN); | |
67 | if (ret < 0) | |
68 | return ret; | |
69 | ||
70 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK, | |
71 | WM8580_CLKSRC_MCLK); | |
72 | if (ret < 0) | |
73 | return ret; | |
74 | } else { | |
75 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA, | |
76 | mclk_freq, SND_SOC_CLOCK_IN); | |
77 | if (ret < 0) | |
78 | return ret; | |
79 | ||
80 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK, | |
81 | WM8580_CLKSRC_PLLA); | |
82 | if (ret < 0) | |
83 | return ret; | |
84 | ||
85 | ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0, | |
86 | xtal_freq, mclk_freq); | |
87 | if (ret < 0) | |
88 | return ret; | |
89 | } | |
90 | ||
91 | /* Set PCM source clock on CPU */ | |
92 | ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX, | |
93 | mclk_freq, SND_SOC_CLOCK_IN); | |
94 | if (ret < 0) | |
95 | return ret; | |
96 | ||
97 | /* Set SCLK_DIV for making bclk */ | |
98 | ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs); | |
99 | if (ret < 0) | |
100 | return ret; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static struct snd_soc_ops smdk_wm8580_pcm_ops = { | |
106 | .hw_params = smdk_wm8580_pcm_hw_params, | |
107 | }; | |
108 | ||
6a5794f2 LPC |
109 | #define SMDK_DAI_FMT (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | \ |
110 | SND_SOC_DAIFMT_CBS_CFS) | |
111 | ||
b8eeee68 SK |
112 | static struct snd_soc_dai_link smdk_dai[] = { |
113 | { | |
114 | .name = "WM8580 PAIF PCM RX", | |
115 | .stream_name = "Playback", | |
116 | .cpu_dai_name = "samsung-pcm.0", | |
117 | .codec_dai_name = "wm8580-hifi-playback", | |
118 | .platform_name = "samsung-audio", | |
5d5d09b2 | 119 | .codec_name = "wm8580.0-001b", |
6a5794f2 | 120 | .dai_fmt = SMDK_DAI_FMT, |
b8eeee68 SK |
121 | .ops = &smdk_wm8580_pcm_ops, |
122 | }, { | |
123 | .name = "WM8580 PAIF PCM TX", | |
124 | .stream_name = "Capture", | |
125 | .cpu_dai_name = "samsung-pcm.0", | |
126 | .codec_dai_name = "wm8580-hifi-capture", | |
a08485d8 | 127 | .platform_name = "samsung-pcm.0", |
5d5d09b2 | 128 | .codec_name = "wm8580.0-001b", |
6a5794f2 | 129 | .dai_fmt = SMDK_DAI_FMT, |
b8eeee68 SK |
130 | .ops = &smdk_wm8580_pcm_ops, |
131 | }, | |
132 | }; | |
133 | ||
134 | static struct snd_soc_card smdk_pcm = { | |
135 | .name = "SMDK-PCM", | |
095d79dc | 136 | .owner = THIS_MODULE, |
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137 | .dai_link = smdk_dai, |
138 | .num_links = 2, | |
139 | }; | |
140 | ||
141 | /* | |
142 | * After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1) | |
143 | * is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4), | |
144 | * 2.0484Mhz, directly with MCLK both Codec and SoC. | |
145 | */ | |
fdca21ad | 146 | static int snd_smdk_probe(struct platform_device *pdev) |
b8eeee68 SK |
147 | { |
148 | int ret = 0; | |
149 | ||
150 | xtal_freq = SMDK_WM8580_EXT_OSC; | |
151 | mclk_freq = SMDK_WM8580_EXT_MCLK; | |
152 | ||
153 | if (machine_is_smdkc110() || machine_is_smdkv210()) | |
154 | xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE; | |
155 | ||
156 | smdk_pcm.dev = &pdev->dev; | |
c583883e TB |
157 | ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm); |
158 | if (ret) | |
b8eeee68 | 159 | dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret); |
b8eeee68 | 160 | |
c583883e | 161 | return ret; |
b8eeee68 SK |
162 | } |
163 | ||
164 | static struct platform_driver snd_smdk_driver = { | |
165 | .driver = { | |
b8eeee68 SK |
166 | .name = "samsung-smdk-pcm", |
167 | }, | |
168 | .probe = snd_smdk_probe, | |
b8eeee68 SK |
169 | }; |
170 | ||
e00c3f55 | 171 | module_platform_driver(snd_smdk_driver); |
b8eeee68 SK |
172 | |
173 | MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>"); | |
174 | MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM"); | |
175 | MODULE_LICENSE("GPL"); |