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 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",
144 .codec_name = "wm9713-codec",
145 .platform_name = "pxa-pcm-audio",
146 .cpu_dai_name = "pxa2xx-ac97",
147 .codec_dai_name = "wm9713-hifi",
148 .init = zylonite_wm9713_init,
149 },
150 {
151 .name = "AC97 Aux",
152 .stream_name = "AC97 Aux",
153 .codec_name = "wm9713-codec",
154 .platform_name = "pxa-pcm-audio",
155 .cpu_dai_name = "pxa2xx-ac97-aux",
156 .codec_dai_name = "wm9713-aux",
157 },
158 {
159 .name = "WM9713 Voice",
160 .stream_name = "WM9713 Voice",
161 .codec_name = "wm9713-codec",
162 .platform_name = "pxa-pcm-audio",
163 .cpu_dai_name = "pxa-ssp-dai.2",
164 .codec_dai_name = "wm9713-voice",
165 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
166 SND_SOC_DAIFMT_CBS_CFS,
167 .ops = &zylonite_voice_ops,
168 },
169 };
170
zylonite_probe(struct snd_soc_card * card)171 static int zylonite_probe(struct snd_soc_card *card)
172 {
173 int ret;
174
175 if (clk_pout) {
176 pout = clk_get(NULL, "CLK_POUT");
177 if (IS_ERR(pout)) {
178 dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
179 PTR_ERR(pout));
180 return PTR_ERR(pout);
181 }
182
183 ret = clk_enable(pout);
184 if (ret != 0) {
185 dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
186 ret);
187 clk_put(pout);
188 return ret;
189 }
190
191 dev_dbg(card->dev, "MCLK enabled at %luHz\n",
192 clk_get_rate(pout));
193 }
194
195 return 0;
196 }
197
zylonite_remove(struct snd_soc_card * card)198 static int zylonite_remove(struct snd_soc_card *card)
199 {
200 if (clk_pout) {
201 clk_disable(pout);
202 clk_put(pout);
203 }
204
205 return 0;
206 }
207
zylonite_suspend_post(struct snd_soc_card * card)208 static int zylonite_suspend_post(struct snd_soc_card *card)
209 {
210 if (clk_pout)
211 clk_disable(pout);
212
213 return 0;
214 }
215
zylonite_resume_pre(struct snd_soc_card * card)216 static int zylonite_resume_pre(struct snd_soc_card *card)
217 {
218 int ret = 0;
219
220 if (clk_pout) {
221 ret = clk_enable(pout);
222 if (ret != 0)
223 dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
224 ret);
225 }
226
227 return ret;
228 }
229
230 static struct snd_soc_card zylonite = {
231 .name = "Zylonite",
232 .owner = THIS_MODULE,
233 .probe = &zylonite_probe,
234 .remove = &zylonite_remove,
235 .suspend_post = &zylonite_suspend_post,
236 .resume_pre = &zylonite_resume_pre,
237 .dai_link = zylonite_dai,
238 .num_links = ARRAY_SIZE(zylonite_dai),
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),
244 };
245
246 static struct platform_device *zylonite_snd_ac97_device;
247
zylonite_init(void)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
256 platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
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
zylonite_exit(void)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");
276