b6445757fc547d953ca23a0da5dd7a3ff1ab8ccf
[linux-2.6.git] / sound / soc / pxa / zylonite.c
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>
17 #include <linux/clk.h>
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>
23
24 #include "../codecs/wm9713.h"
25 #include "pxa2xx-ac97.h"
26 #include "pxa-ssp.h"
27
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
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
72 static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
73 {
74         struct snd_soc_codec *codec = rtd->codec;
75         struct snd_soc_dapm_context *dapm = &codec->dapm;
76
77         if (clk_pout)
78                 snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
79                                     clk_get_rate(pout), 0);
80
81         snd_soc_dapm_new_controls(dapm, zylonite_dapm_widgets,
82                                   ARRAY_SIZE(zylonite_dapm_widgets));
83
84         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
85
86         /* Static setup for now */
87         snd_soc_dapm_enable_pin(dapm, "Headphone");
88         snd_soc_dapm_enable_pin(dapm, "Headset Earpiece");
89
90         snd_soc_dapm_sync(dapm);
91         return 0;
92 }
93
94 static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
95                                     struct snd_pcm_hw_params *params)
96 {
97         struct snd_soc_pcm_runtime *rtd = substream->private_data;
98         struct snd_soc_dai *codec_dai = rtd->codec_dai;
99         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
100         unsigned int pll_out = 0;
101         unsigned int wm9713_div = 0;
102         int ret = 0;
103         int rate = params_rate(params);
104         int width = snd_pcm_format_physical_width(params_format(params));
105
106         /* Only support ratios that we can generate neatly from the AC97
107          * based master clock - in particular, this excludes 44.1kHz.
108          * In most applications the voice DAC will be used for telephony
109          * data so multiples of 8kHz will be the common case.
110          */
111         switch (rate) {
112         case 8000:
113                 wm9713_div = 12;
114                 break;
115         case 16000:
116                 wm9713_div = 6;
117                 break;
118         case 48000:
119                 wm9713_div = 2;
120                 break;
121         default:
122                 /* Don't support OSS emulation */
123                 return -EINVAL;
124         }
125
126         /* Add 1 to the width for the leading clock cycle */
127         pll_out = rate * (width + 1) * 8;
128
129         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
130         if (ret < 0)
131                 return ret;
132
133         ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
134         if (ret < 0)
135                 return ret;
136
137         if (clk_pout)
138                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
139                                              WM9713_PCMDIV(wm9713_div));
140         else
141                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
142                                              WM9713_PCMDIV(wm9713_div));
143         if (ret < 0)
144                 return ret;
145
146         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
147                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
148         if (ret < 0)
149                 return ret;
150
151         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
152                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
153         if (ret < 0)
154                 return ret;
155
156         return 0;
157 }
158
159 static struct snd_soc_ops zylonite_voice_ops = {
160         .hw_params = zylonite_voice_hw_params,
161 };
162
163 static struct snd_soc_dai_link zylonite_dai[] = {
164 {
165         .name = "AC97",
166         .stream_name = "AC97 HiFi",
167         .codec_name = "wm9713-codec",
168         .platform_name = "pxa-pcm-audio",
169         .cpu_dai_name = "pxa2xx-ac97",
170         .codec_dai_name = "wm9713-hifi",
171         .init = zylonite_wm9713_init,
172 },
173 {
174         .name = "AC97 Aux",
175         .stream_name = "AC97 Aux",
176         .codec_name = "wm9713-codec",
177         .platform_name = "pxa-pcm-audio",
178         .cpu_dai_name = "pxa2xx-ac97-aux",
179         .codec_dai_name = "wm9713-aux",
180 },
181 {
182         .name = "WM9713 Voice",
183         .stream_name = "WM9713 Voice",
184         .codec_name = "wm9713-codec",
185         .platform_name = "pxa-pcm-audio",
186         .cpu_dai_name = "pxa-ssp-dai.2",
187         .codec_dai_name = "wm9713-voice",
188         .ops = &zylonite_voice_ops,
189 },
190 };
191
192 static int zylonite_probe(struct snd_soc_card *card)
193 {
194         int ret;
195
196         if (clk_pout) {
197                 pout = clk_get(NULL, "CLK_POUT");
198                 if (IS_ERR(pout)) {
199                         dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
200                                 PTR_ERR(pout));
201                         return PTR_ERR(pout);
202                 }
203
204                 ret = clk_enable(pout);
205                 if (ret != 0) {
206                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
207                                 ret);
208                         clk_put(pout);
209                         return ret;
210                 }
211
212                 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
213                         clk_get_rate(pout));
214         }
215
216         return 0;
217 }
218
219 static int zylonite_remove(struct snd_soc_card *card)
220 {
221         if (clk_pout) {
222                 clk_disable(pout);
223                 clk_put(pout);
224         }
225
226         return 0;
227 }
228
229 static int zylonite_suspend_post(struct snd_soc_card *card)
230 {
231         if (clk_pout)
232                 clk_disable(pout);
233
234         return 0;
235 }
236
237 static int zylonite_resume_pre(struct snd_soc_card *card)
238 {
239         int ret = 0;
240
241         if (clk_pout) {
242                 ret = clk_enable(pout);
243                 if (ret != 0)
244                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
245                                 ret);
246         }
247
248         return ret;
249 }
250
251 static struct snd_soc_card zylonite = {
252         .name = "Zylonite",
253         .probe = &zylonite_probe,
254         .remove = &zylonite_remove,
255         .suspend_post = &zylonite_suspend_post,
256         .resume_pre = &zylonite_resume_pre,
257         .dai_link = zylonite_dai,
258         .num_links = ARRAY_SIZE(zylonite_dai),
259         .owner = THIS_MODULE,
260 };
261
262 static struct platform_device *zylonite_snd_ac97_device;
263
264 static int __init zylonite_init(void)
265 {
266         int ret;
267
268         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
269         if (!zylonite_snd_ac97_device)
270                 return -ENOMEM;
271
272         platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
273
274         ret = platform_device_add(zylonite_snd_ac97_device);
275         if (ret != 0)
276                 platform_device_put(zylonite_snd_ac97_device);
277
278         return ret;
279 }
280
281 static void __exit zylonite_exit(void)
282 {
283         platform_device_unregister(zylonite_snd_ac97_device);
284 }
285
286 module_init(zylonite_init);
287 module_exit(zylonite_exit);
288
289 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
290 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
291 MODULE_LICENSE("GPL");