Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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 #include <sound/soc-dapm.h>
24
25 #include "../codecs/wm9713.h"
26 #include "pxa2xx-pcm.h"
27 #include "pxa2xx-ac97.h"
28 #include "pxa-ssp.h"
29
30 /*
31  * There is a physical switch SW15 on the board which changes the MCLK
32  * for the WM9713 between the standard AC97 master clock and the
33  * output of the CLK_POUT signal from the PXA.
34  */
35 static int clk_pout;
36 module_param(clk_pout, int, 0);
37 MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
38
39 static struct clk *pout;
40
41 static struct snd_soc_card zylonite;
42
43 static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
44         SND_SOC_DAPM_HP("Headphone", NULL),
45         SND_SOC_DAPM_MIC("Headset Microphone", NULL),
46         SND_SOC_DAPM_MIC("Handset Microphone", NULL),
47         SND_SOC_DAPM_SPK("Multiactor", NULL),
48         SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
49 };
50
51 /* Currently supported audio map */
52 static const struct snd_soc_dapm_route audio_map[] = {
53
54         /* Headphone output connected to HPL/HPR */
55         { "Headphone", NULL,  "HPL" },
56         { "Headphone", NULL,  "HPR" },
57
58         /* On-board earpiece */
59         { "Headset Earpiece", NULL, "OUT3" },
60
61         /* Headphone mic */
62         { "MIC2A", NULL, "Mic Bias" },
63         { "Mic Bias", NULL, "Headset Microphone" },
64
65         /* On-board mic */
66         { "MIC1", NULL, "Mic Bias" },
67         { "Mic Bias", NULL, "Handset Microphone" },
68
69         /* Multiactor differentially connected over SPKL/SPKR */
70         { "Multiactor", NULL, "SPKL" },
71         { "Multiactor", NULL, "SPKR" },
72 };
73
74 static int zylonite_wm9713_init(struct snd_soc_codec *codec)
75 {
76         if (clk_pout)
77                 snd_soc_dai_set_pll(&codec->dai[0], 0, 0,
78                                     clk_get_rate(pout), 0);
79
80         snd_soc_dapm_new_controls(codec, zylonite_dapm_widgets,
81                                   ARRAY_SIZE(zylonite_dapm_widgets));
82
83         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
84
85         /* Static setup for now */
86         snd_soc_dapm_enable_pin(codec, "Headphone");
87         snd_soc_dapm_enable_pin(codec, "Headset Earpiece");
88
89         snd_soc_dapm_sync(codec);
90         return 0;
91 }
92
93 static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
94                                     struct snd_pcm_hw_params *params)
95 {
96         struct snd_soc_pcm_runtime *rtd = substream->private_data;
97         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
98         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
99         unsigned int pll_out = 0;
100         unsigned int wm9713_div = 0;
101         int ret = 0;
102         int rate = params_rate(params);
103         int width = snd_pcm_format_physical_width(params_format(params));
104
105         /* Only support ratios that we can generate neatly from the AC97
106          * based master clock - in particular, this excludes 44.1kHz.
107          * In most applications the voice DAC will be used for telephony
108          * data so multiples of 8kHz will be the common case.
109          */
110         switch (rate) {
111         case 8000:
112                 wm9713_div = 12;
113                 break;
114         case 16000:
115                 wm9713_div = 6;
116                 break;
117         case 48000:
118                 wm9713_div = 2;
119                 break;
120         default:
121                 /* Don't support OSS emulation */
122                 return -EINVAL;
123         }
124
125         /* Add 1 to the width for the leading clock cycle */
126         pll_out = rate * (width + 1) * 8;
127
128         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
129         if (ret < 0)
130                 return ret;
131
132         ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
133         if (ret < 0)
134                 return ret;
135
136         if (clk_pout)
137                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
138                                              WM9713_PCMDIV(wm9713_div));
139         else
140                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
141                                              WM9713_PCMDIV(wm9713_div));
142         if (ret < 0)
143                 return ret;
144
145         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
146                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
147         if (ret < 0)
148                 return ret;
149
150         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
151                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
152         if (ret < 0)
153                 return ret;
154
155         return 0;
156 }
157
158 static struct snd_soc_ops zylonite_voice_ops = {
159         .hw_params = zylonite_voice_hw_params,
160 };
161
162 static struct snd_soc_dai_link zylonite_dai[] = {
163 {
164         .name = "AC97",
165         .stream_name = "AC97 HiFi",
166         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
167         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
168         .init = zylonite_wm9713_init,
169 },
170 {
171         .name = "AC97 Aux",
172         .stream_name = "AC97 Aux",
173         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
174         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
175 },
176 {
177         .name = "WM9713 Voice",
178         .stream_name = "WM9713 Voice",
179         .cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP3],
180         .codec_dai = &wm9713_dai[WM9713_DAI_PCM_VOICE],
181         .ops = &zylonite_voice_ops,
182 },
183 };
184
185 static int zylonite_probe(struct platform_device *pdev)
186 {
187         int ret;
188
189         if (clk_pout) {
190                 pout = clk_get(NULL, "CLK_POUT");
191                 if (IS_ERR(pout)) {
192                         dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
193                                 PTR_ERR(pout));
194                         return PTR_ERR(pout);
195                 }
196
197                 ret = clk_enable(pout);
198                 if (ret != 0) {
199                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
200                                 ret);
201                         clk_put(pout);
202                         return ret;
203                 }
204
205                 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
206                         clk_get_rate(pout));
207         }
208
209         return 0;
210 }
211
212 static int zylonite_remove(struct platform_device *pdev)
213 {
214         if (clk_pout) {
215                 clk_disable(pout);
216                 clk_put(pout);
217         }
218
219         return 0;
220 }
221
222 static int zylonite_suspend_post(struct platform_device *pdev,
223                                  pm_message_t state)
224 {
225         if (clk_pout)
226                 clk_disable(pout);
227
228         return 0;
229 }
230
231 static int zylonite_resume_pre(struct platform_device *pdev)
232 {
233         int ret = 0;
234
235         if (clk_pout) {
236                 ret = clk_enable(pout);
237                 if (ret != 0)
238                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
239                                 ret);
240         }
241
242         return ret;
243 }
244
245 static struct snd_soc_card zylonite = {
246         .name = "Zylonite",
247         .probe = &zylonite_probe,
248         .remove = &zylonite_remove,
249         .suspend_post = &zylonite_suspend_post,
250         .resume_pre = &zylonite_resume_pre,
251         .platform = &pxa2xx_soc_platform,
252         .dai_link = zylonite_dai,
253         .num_links = ARRAY_SIZE(zylonite_dai),
254 };
255
256 static struct snd_soc_device zylonite_snd_ac97_devdata = {
257         .card = &zylonite,
258         .codec_dev = &soc_codec_dev_wm9713,
259 };
260
261 static struct platform_device *zylonite_snd_ac97_device;
262
263 static int __init zylonite_init(void)
264 {
265         int ret;
266
267         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
268         if (!zylonite_snd_ac97_device)
269                 return -ENOMEM;
270
271         platform_set_drvdata(zylonite_snd_ac97_device,
272                              &zylonite_snd_ac97_devdata);
273         zylonite_snd_ac97_devdata.dev = &zylonite_snd_ac97_device->dev;
274
275         ret = platform_device_add(zylonite_snd_ac97_device);
276         if (ret != 0)
277                 platform_device_put(zylonite_snd_ac97_device);
278
279         return ret;
280 }
281
282 static void __exit zylonite_exit(void)
283 {
284         platform_device_unregister(zylonite_snd_ac97_device);
285 }
286
287 module_init(zylonite_init);
288 module_exit(zylonite_exit);
289
290 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
291 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
292 MODULE_LICENSE("GPL");