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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> |
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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" | |
19 | #include "dma.h" | |
20 | #include "pcm.h" | |
21 | ||
22 | /* | |
23 | * Board Settings: | |
24 | * o '1' means 'ON' | |
25 | * o '0' means 'OFF' | |
26 | * o 'X' means 'Don't care' | |
27 | * | |
28 | * SMDK6410, SMDK6440, SMDK6450 Base B/D: CFG1-0000, CFG2-1111 | |
29 | * SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000 | |
30 | */ | |
31 | ||
32 | #define SMDK_WM8580_EXT_OSC 12000000 | |
33 | #define SMDK_WM8580_EXT_MCLK 4096000 | |
34 | #define SMDK_WM8580_EXT_VOICE 2048000 | |
35 | ||
36 | static unsigned long mclk_freq; | |
37 | static unsigned long xtal_freq; | |
38 | ||
39 | /* | |
40 | * If MCLK clock directly gets from XTAL, we don't have to use PLL | |
41 | * to make MCLK, but if XTAL clock source connects with other codec | |
42 | * pin (like XTI), we should have to set codec's PLL to make MCLK. | |
43 | * Because Samsung SoC does not support pcmcdclk output like I2S. | |
44 | */ | |
45 | ||
46 | static int smdk_wm8580_pcm_hw_params(struct snd_pcm_substream *substream, | |
47 | struct snd_pcm_hw_params *params) | |
48 | { | |
49 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
50 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
51 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
52 | int rfs, ret; | |
53 | ||
54 | switch (params_rate(params)) { | |
55 | case 8000: | |
56 | break; | |
57 | default: | |
58 | printk(KERN_ERR "%s:%d Sampling Rate %u not supported!\n", | |
59 | __func__, __LINE__, params_rate(params)); | |
60 | return -EINVAL; | |
61 | } | |
62 | ||
63 | rfs = mclk_freq / params_rate(params) / 2; | |
64 | ||
65 | /* Set the codec DAI configuration */ | |
66 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B | |
67 | | SND_SOC_DAIFMT_IB_NF | |
68 | | SND_SOC_DAIFMT_CBS_CFS); | |
69 | if (ret < 0) | |
70 | return ret; | |
71 | ||
72 | /* Set the cpu DAI configuration */ | |
73 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_B | |
74 | | SND_SOC_DAIFMT_IB_NF | |
75 | | SND_SOC_DAIFMT_CBS_CFS); | |
76 | if (ret < 0) | |
77 | return ret; | |
78 | ||
79 | if (mclk_freq == xtal_freq) { | |
80 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK, | |
81 | mclk_freq, SND_SOC_CLOCK_IN); | |
82 | if (ret < 0) | |
83 | return ret; | |
84 | ||
85 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK, | |
86 | WM8580_CLKSRC_MCLK); | |
87 | if (ret < 0) | |
88 | return ret; | |
89 | } else { | |
90 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA, | |
91 | mclk_freq, SND_SOC_CLOCK_IN); | |
92 | if (ret < 0) | |
93 | return ret; | |
94 | ||
95 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK, | |
96 | WM8580_CLKSRC_PLLA); | |
97 | if (ret < 0) | |
98 | return ret; | |
99 | ||
100 | ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0, | |
101 | xtal_freq, mclk_freq); | |
102 | if (ret < 0) | |
103 | return ret; | |
104 | } | |
105 | ||
106 | /* Set PCM source clock on CPU */ | |
107 | ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX, | |
108 | mclk_freq, SND_SOC_CLOCK_IN); | |
109 | if (ret < 0) | |
110 | return ret; | |
111 | ||
112 | /* Set SCLK_DIV for making bclk */ | |
113 | ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs); | |
114 | if (ret < 0) | |
115 | return ret; | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | static struct snd_soc_ops smdk_wm8580_pcm_ops = { | |
121 | .hw_params = smdk_wm8580_pcm_hw_params, | |
122 | }; | |
123 | ||
124 | static struct snd_soc_dai_link smdk_dai[] = { | |
125 | { | |
126 | .name = "WM8580 PAIF PCM RX", | |
127 | .stream_name = "Playback", | |
128 | .cpu_dai_name = "samsung-pcm.0", | |
129 | .codec_dai_name = "wm8580-hifi-playback", | |
130 | .platform_name = "samsung-audio", | |
5d5d09b2 | 131 | .codec_name = "wm8580.0-001b", |
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132 | .ops = &smdk_wm8580_pcm_ops, |
133 | }, { | |
134 | .name = "WM8580 PAIF PCM TX", | |
135 | .stream_name = "Capture", | |
136 | .cpu_dai_name = "samsung-pcm.0", | |
137 | .codec_dai_name = "wm8580-hifi-capture", | |
138 | .platform_name = "samsung-audio", | |
5d5d09b2 | 139 | .codec_name = "wm8580.0-001b", |
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140 | .ops = &smdk_wm8580_pcm_ops, |
141 | }, | |
142 | }; | |
143 | ||
144 | static struct snd_soc_card smdk_pcm = { | |
145 | .name = "SMDK-PCM", | |
146 | .dai_link = smdk_dai, | |
147 | .num_links = 2, | |
148 | }; | |
149 | ||
150 | /* | |
151 | * After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1) | |
152 | * is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4), | |
153 | * 2.0484Mhz, directly with MCLK both Codec and SoC. | |
154 | */ | |
155 | static int __devinit snd_smdk_probe(struct platform_device *pdev) | |
156 | { | |
157 | int ret = 0; | |
158 | ||
159 | xtal_freq = SMDK_WM8580_EXT_OSC; | |
160 | mclk_freq = SMDK_WM8580_EXT_MCLK; | |
161 | ||
162 | if (machine_is_smdkc110() || machine_is_smdkv210()) | |
163 | xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE; | |
164 | ||
165 | smdk_pcm.dev = &pdev->dev; | |
166 | ret = snd_soc_register_card(&smdk_pcm); | |
167 | if (ret) { | |
168 | dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret); | |
169 | return ret; | |
170 | } | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | static int __devexit snd_smdk_remove(struct platform_device *pdev) | |
176 | { | |
177 | snd_soc_unregister_card(&smdk_pcm); | |
178 | platform_set_drvdata(pdev, NULL); | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static struct platform_driver snd_smdk_driver = { | |
183 | .driver = { | |
184 | .owner = THIS_MODULE, | |
185 | .name = "samsung-smdk-pcm", | |
186 | }, | |
187 | .probe = snd_smdk_probe, | |
188 | .remove = __devexit_p(snd_smdk_remove), | |
189 | }; | |
190 | ||
e00c3f55 | 191 | module_platform_driver(snd_smdk_driver); |
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192 | |
193 | MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>"); | |
194 | MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM"); | |
195 | MODULE_LICENSE("GPL"); |