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
zylonite_wm9713_init(struct snd_soc_pcm_runtime * rtd)72 static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
73 {
74 if (clk_pout)
75 snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
76 clk_get_rate(pout), 0);
77
78 return 0;
79 }
80
zylonite_voice_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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;
85 struct snd_soc_dai *codec_dai = rtd->codec_dai;
86 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
87 unsigned int pll_out = 0;
88 unsigned int wm9713_div = 0;
89 int ret = 0;
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) {
99 case 8000:
100 wm9713_div = 12;
101 break;
102 case 16000:
103 wm9713_div = 6;
104 break;
105 case 48000:
106 wm9713_div = 2;
107 break;
108 default:
109 /* Don't support OSS emulation */
110 return -EINVAL;
111 }
112
113 /* Add 1 to the width for the leading clock cycle */
114 pll_out = rate * (width + 1) * 8;
115
116 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
117 if (ret < 0)
118 return ret;
119
120 ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
121 if (ret < 0)
122 return ret;
123
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));
130 if (ret < 0)
131 return ret;
132
133 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
134 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
135 if (ret < 0)
136 return ret;
137
138 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
139 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
140 if (ret < 0)
141 return ret;
142
143 return 0;
144 }
145
146 static struct snd_soc_ops zylonite_voice_ops = {
147 .hw_params = zylonite_voice_hw_params,
148 };
149
150 static struct snd_soc_dai_link zylonite_dai[] = {
151 {
152 .name = "AC97",
153 .stream_name = "AC97 HiFi",
154 .codec_name = "wm9713-codec",
155 .platform_name = "pxa-pcm-audio",
156 .cpu_dai_name = "pxa2xx-ac97",
157 .codec_dai_name = "wm9713-hifi",
158 .init = zylonite_wm9713_init,
159 },
160 {
161 .name = "AC97 Aux",
162 .stream_name = "AC97 Aux",
163 .codec_name = "wm9713-codec",
164 .platform_name = "pxa-pcm-audio",
165 .cpu_dai_name = "pxa2xx-ac97-aux",
166 .codec_dai_name = "wm9713-aux",
167 },
168 {
169 .name = "WM9713 Voice",
170 .stream_name = "WM9713 Voice",
171 .codec_name = "wm9713-codec",
172 .platform_name = "pxa-pcm-audio",
173 .cpu_dai_name = "pxa-ssp-dai.2",
174 .codec_dai_name = "wm9713-voice",
175 .ops = &zylonite_voice_ops,
176 },
177 };
178
zylonite_probe(struct snd_soc_card * card)179 static int zylonite_probe(struct snd_soc_card *card)
180 {
181 int ret;
182
183 if (clk_pout) {
184 pout = clk_get(NULL, "CLK_POUT");
185 if (IS_ERR(pout)) {
186 dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
187 PTR_ERR(pout));
188 return PTR_ERR(pout);
189 }
190
191 ret = clk_enable(pout);
192 if (ret != 0) {
193 dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
194 ret);
195 clk_put(pout);
196 return ret;
197 }
198
199 dev_dbg(card->dev, "MCLK enabled at %luHz\n",
200 clk_get_rate(pout));
201 }
202
203 return 0;
204 }
205
zylonite_remove(struct snd_soc_card * card)206 static int zylonite_remove(struct snd_soc_card *card)
207 {
208 if (clk_pout) {
209 clk_disable(pout);
210 clk_put(pout);
211 }
212
213 return 0;
214 }
215
zylonite_suspend_post(struct snd_soc_card * card)216 static int zylonite_suspend_post(struct snd_soc_card *card)
217 {
218 if (clk_pout)
219 clk_disable(pout);
220
221 return 0;
222 }
223
zylonite_resume_pre(struct snd_soc_card * card)224 static int zylonite_resume_pre(struct snd_soc_card *card)
225 {
226 int ret = 0;
227
228 if (clk_pout) {
229 ret = clk_enable(pout);
230 if (ret != 0)
231 dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
232 ret);
233 }
234
235 return ret;
236 }
237
238 static struct snd_soc_card zylonite = {
239 .name = "Zylonite",
240 .owner = THIS_MODULE,
241 .probe = &zylonite_probe,
242 .remove = &zylonite_remove,
243 .suspend_post = &zylonite_suspend_post,
244 .resume_pre = &zylonite_resume_pre,
245 .dai_link = zylonite_dai,
246 .num_links = ARRAY_SIZE(zylonite_dai),
247
248 .dapm_widgets = zylonite_dapm_widgets,
249 .num_dapm_widgets = ARRAY_SIZE(zylonite_dapm_widgets),
250 .dapm_routes = audio_map,
251 .num_dapm_routes = ARRAY_SIZE(audio_map),
252 };
253
254 static struct platform_device *zylonite_snd_ac97_device;
255
zylonite_init(void)256 static int __init zylonite_init(void)
257 {
258 int ret;
259
260 zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
261 if (!zylonite_snd_ac97_device)
262 return -ENOMEM;
263
264 platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
265
266 ret = platform_device_add(zylonite_snd_ac97_device);
267 if (ret != 0)
268 platform_device_put(zylonite_snd_ac97_device);
269
270 return ret;
271 }
272
zylonite_exit(void)273 static void __exit zylonite_exit(void)
274 {
275 platform_device_unregister(zylonite_snd_ac97_device);
276 }
277
278 module_init(zylonite_init);
279 module_exit(zylonite_exit);
280
281 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
282 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
283 MODULE_LICENSE("GPL");
284