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1 | /* |
2 | * zylonite.c -- SoC audio for Zylonite | |
3 | * | |
4 | * Copyright 2008 Wolfson Microelectronics PLC. | |
5 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License as | |
9 | * published by the Free Software Foundation; either version 2 of the | |
10 | * License, or (at your option) any later version. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/device.h> | |
2c782f59 | 17 | #include <linux/clk.h> |
2dac9217 MB |
18 | #include <linux/i2c.h> |
19 | #include <sound/core.h> | |
20 | #include <sound/pcm.h> | |
21 | #include <sound/pcm_params.h> | |
22 | #include <sound/soc.h> | |
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23 | |
24 | #include "../codecs/wm9713.h" | |
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25 | #include "pxa2xx-ac97.h" |
26 | #include "pxa-ssp.h" | |
27 | ||
2c782f59 MB |
28 | /* |
29 | * There is a physical switch SW15 on the board which changes the MCLK | |
30 | * for the WM9713 between the standard AC97 master clock and the | |
31 | * output of the CLK_POUT signal from the PXA. | |
32 | */ | |
33 | static int clk_pout; | |
34 | module_param(clk_pout, int, 0); | |
35 | MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board)."); | |
36 | ||
37 | static struct clk *pout; | |
38 | ||
2dac9217 MB |
39 | static struct snd_soc_card zylonite; |
40 | ||
41 | static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = { | |
42 | SND_SOC_DAPM_HP("Headphone", NULL), | |
43 | SND_SOC_DAPM_MIC("Headset Microphone", NULL), | |
44 | SND_SOC_DAPM_MIC("Handset Microphone", NULL), | |
45 | SND_SOC_DAPM_SPK("Multiactor", NULL), | |
46 | SND_SOC_DAPM_SPK("Headset Earpiece", NULL), | |
47 | }; | |
48 | ||
49 | /* Currently supported audio map */ | |
50 | static const struct snd_soc_dapm_route audio_map[] = { | |
51 | ||
52 | /* Headphone output connected to HPL/HPR */ | |
53 | { "Headphone", NULL, "HPL" }, | |
54 | { "Headphone", NULL, "HPR" }, | |
55 | ||
56 | /* On-board earpiece */ | |
57 | { "Headset Earpiece", NULL, "OUT3" }, | |
58 | ||
59 | /* Headphone mic */ | |
60 | { "MIC2A", NULL, "Mic Bias" }, | |
61 | { "Mic Bias", NULL, "Headset Microphone" }, | |
62 | ||
63 | /* On-board mic */ | |
64 | { "MIC1", NULL, "Mic Bias" }, | |
65 | { "Mic Bias", NULL, "Handset Microphone" }, | |
66 | ||
67 | /* Multiactor differentially connected over SPKL/SPKR */ | |
68 | { "Multiactor", NULL, "SPKL" }, | |
69 | { "Multiactor", NULL, "SPKR" }, | |
70 | }; | |
71 | ||
f0fba2ad | 72 | static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd) |
2dac9217 | 73 | { |
2c782f59 | 74 | if (clk_pout) |
f0fba2ad | 75 | snd_soc_dai_set_pll(rtd->codec_dai, 0, 0, |
85488037 | 76 | clk_get_rate(pout), 0); |
2dac9217 | 77 | |
2dac9217 MB |
78 | return 0; |
79 | } | |
80 | ||
81 | static int zylonite_voice_hw_params(struct snd_pcm_substream *substream, | |
82 | struct snd_pcm_hw_params *params) | |
83 | { | |
84 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad LG |
85 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
86 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
a435869c | 87 | unsigned int pll_out = 0; |
2dac9217 MB |
88 | unsigned int wm9713_div = 0; |
89 | int ret = 0; | |
85fab780 MB |
90 | int rate = params_rate(params); |
91 | int width = snd_pcm_format_physical_width(params_format(params)); | |
92 | ||
93 | /* Only support ratios that we can generate neatly from the AC97 | |
94 | * based master clock - in particular, this excludes 44.1kHz. | |
95 | * In most applications the voice DAC will be used for telephony | |
96 | * data so multiples of 8kHz will be the common case. | |
97 | */ | |
98 | switch (rate) { | |
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99 | case 8000: |
100 | wm9713_div = 12; | |
2dac9217 MB |
101 | break; |
102 | case 16000: | |
103 | wm9713_div = 6; | |
2dac9217 MB |
104 | break; |
105 | case 48000: | |
2dac9217 | 106 | wm9713_div = 2; |
2dac9217 | 107 | break; |
85fab780 MB |
108 | default: |
109 | /* Don't support OSS emulation */ | |
110 | return -EINVAL; | |
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111 | } |
112 | ||
85fab780 MB |
113 | /* Add 1 to the width for the leading clock cycle */ |
114 | pll_out = rate * (width + 1) * 8; | |
2dac9217 | 115 | |
85fab780 | 116 | ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1); |
2dac9217 MB |
117 | if (ret < 0) |
118 | return ret; | |
119 | ||
85488037 | 120 | ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out); |
a435869c MB |
121 | if (ret < 0) |
122 | return ret; | |
123 | ||
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124 | if (clk_pout) |
125 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV, | |
126 | WM9713_PCMDIV(wm9713_div)); | |
127 | else | |
128 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV, | |
129 | WM9713_PCMDIV(wm9713_div)); | |
2dac9217 MB |
130 | if (ret < 0) |
131 | return ret; | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static struct snd_soc_ops zylonite_voice_ops = { | |
137 | .hw_params = zylonite_voice_hw_params, | |
138 | }; | |
139 | ||
140 | static struct snd_soc_dai_link zylonite_dai[] = { | |
141 | { | |
142 | .name = "AC97", | |
143 | .stream_name = "AC97 HiFi", | |
f0fba2ad LG |
144 | .codec_name = "wm9713-codec", |
145 | .platform_name = "pxa-pcm-audio", | |
4bfc4e25 | 146 | .cpu_dai_name = "pxa2xx-ac97", |
efd69479 | 147 | .codec_dai_name = "wm9713-hifi", |
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148 | .init = zylonite_wm9713_init, |
149 | }, | |
150 | { | |
151 | .name = "AC97 Aux", | |
152 | .stream_name = "AC97 Aux", | |
f0fba2ad LG |
153 | .codec_name = "wm9713-codec", |
154 | .platform_name = "pxa-pcm-audio", | |
4bfc4e25 | 155 | .cpu_dai_name = "pxa2xx-ac97-aux", |
efd69479 | 156 | .codec_dai_name = "wm9713-aux", |
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157 | }, |
158 | { | |
159 | .name = "WM9713 Voice", | |
160 | .stream_name = "WM9713 Voice", | |
f0fba2ad LG |
161 | .codec_name = "wm9713-codec", |
162 | .platform_name = "pxa-pcm-audio", | |
163 | .cpu_dai_name = "pxa-ssp-dai.2", | |
efd69479 | 164 | .codec_dai_name = "wm9713-voice", |
132c3096 LPC |
165 | .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
166 | SND_SOC_DAIFMT_CBS_CFS, | |
2dac9217 MB |
167 | .ops = &zylonite_voice_ops, |
168 | }, | |
169 | }; | |
170 | ||
e7361ec4 | 171 | static int zylonite_probe(struct snd_soc_card *card) |
2c782f59 MB |
172 | { |
173 | int ret; | |
174 | ||
175 | if (clk_pout) { | |
176 | pout = clk_get(NULL, "CLK_POUT"); | |
177 | if (IS_ERR(pout)) { | |
eff919ac | 178 | dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n", |
2c782f59 MB |
179 | PTR_ERR(pout)); |
180 | return PTR_ERR(pout); | |
181 | } | |
182 | ||
183 | ret = clk_enable(pout); | |
184 | if (ret != 0) { | |
eff919ac | 185 | dev_err(card->dev, "Unable to enable CLK_POUT: %d\n", |
2c782f59 MB |
186 | ret); |
187 | clk_put(pout); | |
188 | return ret; | |
189 | } | |
190 | ||
eff919ac | 191 | dev_dbg(card->dev, "MCLK enabled at %luHz\n", |
2c782f59 MB |
192 | clk_get_rate(pout)); |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
e7361ec4 | 198 | static int zylonite_remove(struct snd_soc_card *card) |
2c782f59 MB |
199 | { |
200 | if (clk_pout) { | |
201 | clk_disable(pout); | |
202 | clk_put(pout); | |
203 | } | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
70b2ac12 | 208 | static int zylonite_suspend_post(struct snd_soc_card *card) |
2c782f59 MB |
209 | { |
210 | if (clk_pout) | |
211 | clk_disable(pout); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
70b2ac12 | 216 | static int zylonite_resume_pre(struct snd_soc_card *card) |
2c782f59 MB |
217 | { |
218 | int ret = 0; | |
219 | ||
220 | if (clk_pout) { | |
221 | ret = clk_enable(pout); | |
222 | if (ret != 0) | |
eff919ac | 223 | dev_err(card->dev, "Unable to enable CLK_POUT: %d\n", |
2c782f59 MB |
224 | ret); |
225 | } | |
226 | ||
227 | return ret; | |
228 | } | |
229 | ||
2dac9217 MB |
230 | static struct snd_soc_card zylonite = { |
231 | .name = "Zylonite", | |
561c6a17 | 232 | .owner = THIS_MODULE, |
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233 | .probe = &zylonite_probe, |
234 | .remove = &zylonite_remove, | |
235 | .suspend_post = &zylonite_suspend_post, | |
236 | .resume_pre = &zylonite_resume_pre, | |
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237 | .dai_link = zylonite_dai, |
238 | .num_links = ARRAY_SIZE(zylonite_dai), | |
a9576cbb LPC |
239 | |
240 | .dapm_widgets = zylonite_dapm_widgets, | |
241 | .num_dapm_widgets = ARRAY_SIZE(zylonite_dapm_widgets), | |
242 | .dapm_routes = audio_map, | |
243 | .num_dapm_routes = ARRAY_SIZE(audio_map), | |
2dac9217 MB |
244 | }; |
245 | ||
246 | static struct platform_device *zylonite_snd_ac97_device; | |
247 | ||
248 | static int __init zylonite_init(void) | |
249 | { | |
250 | int ret; | |
251 | ||
252 | zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1); | |
253 | if (!zylonite_snd_ac97_device) | |
254 | return -ENOMEM; | |
255 | ||
f0fba2ad | 256 | platform_set_drvdata(zylonite_snd_ac97_device, &zylonite); |
2dac9217 MB |
257 | |
258 | ret = platform_device_add(zylonite_snd_ac97_device); | |
259 | if (ret != 0) | |
260 | platform_device_put(zylonite_snd_ac97_device); | |
261 | ||
262 | return ret; | |
263 | } | |
264 | ||
265 | static void __exit zylonite_exit(void) | |
266 | { | |
267 | platform_device_unregister(zylonite_snd_ac97_device); | |
268 | } | |
269 | ||
270 | module_init(zylonite_init); | |
271 | module_exit(zylonite_exit); | |
272 | ||
273 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
274 | MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite"); | |
275 | MODULE_LICENSE("GPL"); |