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