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, clk_get_rate(pout), 0);
78
79 snd_soc_dapm_new_controls(codec, zylonite_dapm_widgets,
80 ARRAY_SIZE(zylonite_dapm_widgets));
81
82 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
83
84 /* Static setup for now */
85 snd_soc_dapm_enable_pin(codec, "Headphone");
86 snd_soc_dapm_enable_pin(codec, "Headset Earpiece");
87
88 snd_soc_dapm_sync(codec);
89 return 0;
90 }
91
92 static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
93 struct snd_pcm_hw_params *params)
94 {
95 struct snd_soc_pcm_runtime *rtd = substream->private_data;
96 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
97 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
98 unsigned int pll_out = 0;
99 unsigned int wm9713_div = 0;
100 int ret = 0;
101 int rate = params_rate(params);
102 int width = snd_pcm_format_physical_width(params_format(params));
103
104 /* Only support ratios that we can generate neatly from the AC97
105 * based master clock - in particular, this excludes 44.1kHz.
106 * In most applications the voice DAC will be used for telephony
107 * data so multiples of 8kHz will be the common case.
108 */
109 switch (rate) {
110 case 8000:
111 wm9713_div = 12;
112 break;
113 case 16000:
114 wm9713_div = 6;
115 break;
116 case 48000:
117 wm9713_div = 2;
118 break;
119 default:
120 /* Don't support OSS emulation */
121 return -EINVAL;
122 }
123
124 /* Add 1 to the width for the leading clock cycle */
125 pll_out = rate * (width + 1) * 8;
126
127 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
128 if (ret < 0)
129 return ret;
130
131 ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, pll_out);
132 if (ret < 0)
133 return ret;
134
135 if (clk_pout)
136 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
137 WM9713_PCMDIV(wm9713_div));
138 else
139 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
140 WM9713_PCMDIV(wm9713_div));
141 if (ret < 0)
142 return ret;
143
144 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
145 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
146 if (ret < 0)
147 return ret;
148
149 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
150 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
151 if (ret < 0)
152 return ret;
153
154 return 0;
155 }
156
157 static struct snd_soc_ops zylonite_voice_ops = {
158 .hw_params = zylonite_voice_hw_params,
159 };
160
161 static struct snd_soc_dai_link zylonite_dai[] = {
162 {
163 .name = "AC97",
164 .stream_name = "AC97 HiFi",
165 .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
166 .codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
167 .init = zylonite_wm9713_init,
168 },
169 {
170 .name = "AC97 Aux",
171 .stream_name = "AC97 Aux",
172 .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
173 .codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
174 },
175 {
176 .name = "WM9713 Voice",
177 .stream_name = "WM9713 Voice",
178 .cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP3],
179 .codec_dai = &wm9713_dai[WM9713_DAI_PCM_VOICE],
180 .ops = &zylonite_voice_ops,
181 },
182 };
183
184 static int zylonite_probe(struct platform_device *pdev)
185 {
186 int ret;
187
188 if (clk_pout) {
189 pout = clk_get(NULL, "CLK_POUT");
190 if (IS_ERR(pout)) {
191 dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
192 PTR_ERR(pout));
193 return PTR_ERR(pout);
194 }
195
196 ret = clk_enable(pout);
197 if (ret != 0) {
198 dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
199 ret);
200 clk_put(pout);
201 return ret;
202 }
203
204 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
205 clk_get_rate(pout));
206 }
207
208 return 0;
209 }
210
211 static int zylonite_remove(struct platform_device *pdev)
212 {
213 if (clk_pout) {
214 clk_disable(pout);
215 clk_put(pout);
216 }
217
218 return 0;
219 }
220
221 static int zylonite_suspend_post(struct platform_device *pdev,
222 pm_message_t state)
223 {
224 if (clk_pout)
225 clk_disable(pout);
226
227 return 0;
228 }
229
230 static int zylonite_resume_pre(struct platform_device *pdev)
231 {
232 int ret = 0;
233
234 if (clk_pout) {
235 ret = clk_enable(pout);
236 if (ret != 0)
237 dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
238 ret);
239 }
240
241 return ret;
242 }
243
244 static struct snd_soc_card zylonite = {
245 .name = "Zylonite",
246 .probe = &zylonite_probe,
247 .remove = &zylonite_remove,
248 .suspend_post = &zylonite_suspend_post,
249 .resume_pre = &zylonite_resume_pre,
250 .platform = &pxa2xx_soc_platform,
251 .dai_link = zylonite_dai,
252 .num_links = ARRAY_SIZE(zylonite_dai),
253 };
254
255 static struct snd_soc_device zylonite_snd_ac97_devdata = {
256 .card = &zylonite,
257 .codec_dev = &soc_codec_dev_wm9713,
258 };
259
260 static struct platform_device *zylonite_snd_ac97_device;
261
262 static int __init zylonite_init(void)
263 {
264 int ret;
265
266 zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
267 if (!zylonite_snd_ac97_device)
268 return -ENOMEM;
269
270 platform_set_drvdata(zylonite_snd_ac97_device,
271 &zylonite_snd_ac97_devdata);
272 zylonite_snd_ac97_devdata.dev = &zylonite_snd_ac97_device->dev;
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");
292
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