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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 | */ | |
11 | #include <sound/soc.h> | |
12 | #include <sound/pcm_params.h> | |
13 | #include <sound/pcm.h> | |
14 | ||
15 | #include <asm/mach-types.h> | |
16 | ||
17 | #include "../codecs/wm8580.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 | * SMDK6410, SMDK6440, SMDK6450 Base B/D: CFG1-0000, CFG2-1111 | |
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 | ||
64 | /* Set the codec DAI configuration */ | |
65 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B | |
66 | | SND_SOC_DAIFMT_IB_NF | |
67 | | SND_SOC_DAIFMT_CBS_CFS); | |
68 | if (ret < 0) | |
69 | return ret; | |
70 | ||
71 | /* Set the cpu DAI configuration */ | |
72 | ret = snd_soc_dai_set_fmt(cpu_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 | if (mclk_freq == xtal_freq) { | |
79 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK, | |
80 | mclk_freq, SND_SOC_CLOCK_IN); | |
81 | if (ret < 0) | |
82 | return ret; | |
83 | ||
84 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK, | |
85 | WM8580_CLKSRC_MCLK); | |
86 | if (ret < 0) | |
87 | return ret; | |
88 | } else { | |
89 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA, | |
90 | mclk_freq, SND_SOC_CLOCK_IN); | |
91 | if (ret < 0) | |
92 | return ret; | |
93 | ||
94 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK, | |
95 | WM8580_CLKSRC_PLLA); | |
96 | if (ret < 0) | |
97 | return ret; | |
98 | ||
99 | ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0, | |
100 | xtal_freq, mclk_freq); | |
101 | if (ret < 0) | |
102 | return ret; | |
103 | } | |
104 | ||
105 | /* Set PCM source clock on CPU */ | |
106 | ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX, | |
107 | mclk_freq, SND_SOC_CLOCK_IN); | |
108 | if (ret < 0) | |
109 | return ret; | |
110 | ||
111 | /* Set SCLK_DIV for making bclk */ | |
112 | ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs); | |
113 | if (ret < 0) | |
114 | return ret; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | static struct snd_soc_ops smdk_wm8580_pcm_ops = { | |
120 | .hw_params = smdk_wm8580_pcm_hw_params, | |
121 | }; | |
122 | ||
123 | static struct snd_soc_dai_link smdk_dai[] = { | |
124 | { | |
125 | .name = "WM8580 PAIF PCM RX", | |
126 | .stream_name = "Playback", | |
127 | .cpu_dai_name = "samsung-pcm.0", | |
128 | .codec_dai_name = "wm8580-hifi-playback", | |
129 | .platform_name = "samsung-audio", | |
130 | .codec_name = "wm8580-codec.0-001b", | |
131 | .ops = &smdk_wm8580_pcm_ops, | |
132 | }, { | |
133 | .name = "WM8580 PAIF PCM TX", | |
134 | .stream_name = "Capture", | |
135 | .cpu_dai_name = "samsung-pcm.0", | |
136 | .codec_dai_name = "wm8580-hifi-capture", | |
137 | .platform_name = "samsung-audio", | |
138 | .codec_name = "wm8580-codec.0-001b", | |
139 | .ops = &smdk_wm8580_pcm_ops, | |
140 | }, | |
141 | }; | |
142 | ||
143 | static struct snd_soc_card smdk_pcm = { | |
144 | .name = "SMDK-PCM", | |
145 | .dai_link = smdk_dai, | |
146 | .num_links = 2, | |
147 | }; | |
148 | ||
149 | /* | |
150 | * After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1) | |
151 | * is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4), | |
152 | * 2.0484Mhz, directly with MCLK both Codec and SoC. | |
153 | */ | |
154 | static int __devinit snd_smdk_probe(struct platform_device *pdev) | |
155 | { | |
156 | int ret = 0; | |
157 | ||
158 | xtal_freq = SMDK_WM8580_EXT_OSC; | |
159 | mclk_freq = SMDK_WM8580_EXT_MCLK; | |
160 | ||
161 | if (machine_is_smdkc110() || machine_is_smdkv210()) | |
162 | xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE; | |
163 | ||
164 | smdk_pcm.dev = &pdev->dev; | |
165 | ret = snd_soc_register_card(&smdk_pcm); | |
166 | if (ret) { | |
167 | dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret); | |
168 | return ret; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static int __devexit snd_smdk_remove(struct platform_device *pdev) | |
175 | { | |
176 | snd_soc_unregister_card(&smdk_pcm); | |
177 | platform_set_drvdata(pdev, NULL); | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static struct platform_driver snd_smdk_driver = { | |
182 | .driver = { | |
183 | .owner = THIS_MODULE, | |
184 | .name = "samsung-smdk-pcm", | |
185 | }, | |
186 | .probe = snd_smdk_probe, | |
187 | .remove = __devexit_p(snd_smdk_remove), | |
188 | }; | |
189 | ||
190 | static int __init smdk_audio_init(void) | |
191 | { | |
192 | return platform_driver_register(&snd_smdk_driver); | |
193 | } | |
194 | ||
195 | module_init(smdk_audio_init); | |
196 | ||
197 | static void __exit smdk_audio_exit(void) | |
198 | { | |
199 | platform_driver_unregister(&snd_smdk_driver); | |
200 | } | |
201 | ||
202 | module_exit(smdk_audio_exit); | |
203 | ||
204 | MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>"); | |
205 | MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM"); | |
206 | MODULE_LICENSE("GPL"); |