1 /*
2 * corgi.c -- SoC audio for Corgi
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 *
7 * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
8 * Richard Purdie <richard@openedhand.com>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 */
15
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/timer.h>
19 #include <linux/i2c.h>
20 #include <linux/interrupt.h>
21 #include <linux/platform_device.h>
22 #include <linux/gpio.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/soc.h>
26
27 #include <asm/mach-types.h>
28 #include <mach/corgi.h>
29 #include <mach/audio.h>
30
31 #include "../codecs/wm8731.h"
32 #include "pxa2xx-i2s.h"
33
34 #define CORGI_HP 0
35 #define CORGI_MIC 1
36 #define CORGI_LINE 2
37 #define CORGI_HEADSET 3
38 #define CORGI_HP_OFF 4
39 #define CORGI_SPK_ON 0
40 #define CORGI_SPK_OFF 1
41
42 /* audio clock in Hz - rounded from 12.235MHz */
43 #define CORGI_AUDIO_CLOCK 12288000
44
45 static int corgi_jack_func;
46 static int corgi_spk_func;
47
corgi_ext_control(struct snd_soc_dapm_context * dapm)48 static void corgi_ext_control(struct snd_soc_dapm_context *dapm)
49 {
50 /* set up jack connection */
51 switch (corgi_jack_func) {
52 case CORGI_HP:
53 /* set = unmute headphone */
54 gpio_set_value(CORGI_GPIO_MUTE_L, 1);
55 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
56 snd_soc_dapm_disable_pin(dapm, "Mic Jack");
57 snd_soc_dapm_disable_pin(dapm, "Line Jack");
58 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
59 snd_soc_dapm_disable_pin(dapm, "Headset Jack");
60 break;
61 case CORGI_MIC:
62 /* reset = mute headphone */
63 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
64 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
65 snd_soc_dapm_enable_pin(dapm, "Mic Jack");
66 snd_soc_dapm_disable_pin(dapm, "Line Jack");
67 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
68 snd_soc_dapm_disable_pin(dapm, "Headset Jack");
69 break;
70 case CORGI_LINE:
71 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
72 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
73 snd_soc_dapm_disable_pin(dapm, "Mic Jack");
74 snd_soc_dapm_enable_pin(dapm, "Line Jack");
75 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
76 snd_soc_dapm_disable_pin(dapm, "Headset Jack");
77 break;
78 case CORGI_HEADSET:
79 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
80 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
81 snd_soc_dapm_enable_pin(dapm, "Mic Jack");
82 snd_soc_dapm_disable_pin(dapm, "Line Jack");
83 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
84 snd_soc_dapm_enable_pin(dapm, "Headset Jack");
85 break;
86 }
87
88 if (corgi_spk_func == CORGI_SPK_ON)
89 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
90 else
91 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
92
93 /* signal a DAPM event */
94 snd_soc_dapm_sync(dapm);
95 }
96
corgi_startup(struct snd_pcm_substream * substream)97 static int corgi_startup(struct snd_pcm_substream *substream)
98 {
99 struct snd_soc_pcm_runtime *rtd = substream->private_data;
100 struct snd_soc_codec *codec = rtd->codec;
101
102 mutex_lock(&codec->mutex);
103
104 /* check the jack status at stream startup */
105 corgi_ext_control(&codec->dapm);
106
107 mutex_unlock(&codec->mutex);
108
109 return 0;
110 }
111
112 /* we need to unmute the HP at shutdown as the mute burns power on corgi */
corgi_shutdown(struct snd_pcm_substream * substream)113 static void corgi_shutdown(struct snd_pcm_substream *substream)
114 {
115 /* set = unmute headphone */
116 gpio_set_value(CORGI_GPIO_MUTE_L, 1);
117 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
118 }
119
corgi_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)120 static int corgi_hw_params(struct snd_pcm_substream *substream,
121 struct snd_pcm_hw_params *params)
122 {
123 struct snd_soc_pcm_runtime *rtd = substream->private_data;
124 struct snd_soc_dai *codec_dai = rtd->codec_dai;
125 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
126 unsigned int clk = 0;
127 int ret = 0;
128
129 switch (params_rate(params)) {
130 case 8000:
131 case 16000:
132 case 48000:
133 case 96000:
134 clk = 12288000;
135 break;
136 case 11025:
137 case 22050:
138 case 44100:
139 clk = 11289600;
140 break;
141 }
142
143 /* set the codec system clock for DAC and ADC */
144 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
145 SND_SOC_CLOCK_IN);
146 if (ret < 0)
147 return ret;
148
149 /* set the I2S system clock as input (unused) */
150 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
151 SND_SOC_CLOCK_IN);
152 if (ret < 0)
153 return ret;
154
155 return 0;
156 }
157
158 static struct snd_soc_ops corgi_ops = {
159 .startup = corgi_startup,
160 .hw_params = corgi_hw_params,
161 .shutdown = corgi_shutdown,
162 };
163
corgi_get_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)164 static int corgi_get_jack(struct snd_kcontrol *kcontrol,
165 struct snd_ctl_elem_value *ucontrol)
166 {
167 ucontrol->value.integer.value[0] = corgi_jack_func;
168 return 0;
169 }
170
corgi_set_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)171 static int corgi_set_jack(struct snd_kcontrol *kcontrol,
172 struct snd_ctl_elem_value *ucontrol)
173 {
174 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
175
176 if (corgi_jack_func == ucontrol->value.integer.value[0])
177 return 0;
178
179 corgi_jack_func = ucontrol->value.integer.value[0];
180 corgi_ext_control(&card->dapm);
181 return 1;
182 }
183
corgi_get_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)184 static int corgi_get_spk(struct snd_kcontrol *kcontrol,
185 struct snd_ctl_elem_value *ucontrol)
186 {
187 ucontrol->value.integer.value[0] = corgi_spk_func;
188 return 0;
189 }
190
corgi_set_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)191 static int corgi_set_spk(struct snd_kcontrol *kcontrol,
192 struct snd_ctl_elem_value *ucontrol)
193 {
194 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
195
196 if (corgi_spk_func == ucontrol->value.integer.value[0])
197 return 0;
198
199 corgi_spk_func = ucontrol->value.integer.value[0];
200 corgi_ext_control(&card->dapm);
201 return 1;
202 }
203
corgi_amp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)204 static int corgi_amp_event(struct snd_soc_dapm_widget *w,
205 struct snd_kcontrol *k, int event)
206 {
207 gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
208 return 0;
209 }
210
corgi_mic_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)211 static int corgi_mic_event(struct snd_soc_dapm_widget *w,
212 struct snd_kcontrol *k, int event)
213 {
214 gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
215 return 0;
216 }
217
218 /* corgi machine dapm widgets */
219 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
220 SND_SOC_DAPM_HP("Headphone Jack", NULL),
221 SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
222 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
223 SND_SOC_DAPM_LINE("Line Jack", NULL),
224 SND_SOC_DAPM_HP("Headset Jack", NULL),
225 };
226
227 /* Corgi machine audio map (connections to the codec pins) */
228 static const struct snd_soc_dapm_route corgi_audio_map[] = {
229
230 /* headset Jack - in = micin, out = LHPOUT*/
231 {"Headset Jack", NULL, "LHPOUT"},
232
233 /* headphone connected to LHPOUT1, RHPOUT1 */
234 {"Headphone Jack", NULL, "LHPOUT"},
235 {"Headphone Jack", NULL, "RHPOUT"},
236
237 /* speaker connected to LOUT, ROUT */
238 {"Ext Spk", NULL, "ROUT"},
239 {"Ext Spk", NULL, "LOUT"},
240
241 /* mic is connected to MICIN (via right channel of headphone jack) */
242 {"MICIN", NULL, "Mic Jack"},
243
244 /* Same as the above but no mic bias for line signals */
245 {"MICIN", NULL, "Line Jack"},
246 };
247
248 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
249 "Off"};
250 static const char *spk_function[] = {"On", "Off"};
251 static const struct soc_enum corgi_enum[] = {
252 SOC_ENUM_SINGLE_EXT(5, jack_function),
253 SOC_ENUM_SINGLE_EXT(2, spk_function),
254 };
255
256 static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
257 SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
258 corgi_set_jack),
259 SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
260 corgi_set_spk),
261 };
262
263 /*
264 * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
265 */
corgi_wm8731_init(struct snd_soc_pcm_runtime * rtd)266 static int corgi_wm8731_init(struct snd_soc_pcm_runtime *rtd)
267 {
268 struct snd_soc_codec *codec = rtd->codec;
269 struct snd_soc_dapm_context *dapm = &codec->dapm;
270
271 snd_soc_dapm_nc_pin(dapm, "LLINEIN");
272 snd_soc_dapm_nc_pin(dapm, "RLINEIN");
273
274 return 0;
275 }
276
277 /* corgi digital audio interface glue - connects codec <--> CPU */
278 static struct snd_soc_dai_link corgi_dai = {
279 .name = "WM8731",
280 .stream_name = "WM8731",
281 .cpu_dai_name = "pxa2xx-i2s",
282 .codec_dai_name = "wm8731-hifi",
283 .platform_name = "pxa-pcm-audio",
284 .codec_name = "wm8731.0-001b",
285 .init = corgi_wm8731_init,
286 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
287 SND_SOC_DAIFMT_CBS_CFS,
288 .ops = &corgi_ops,
289 };
290
291 /* corgi audio machine driver */
292 static struct snd_soc_card corgi = {
293 .name = "Corgi",
294 .owner = THIS_MODULE,
295 .dai_link = &corgi_dai,
296 .num_links = 1,
297
298 .controls = wm8731_corgi_controls,
299 .num_controls = ARRAY_SIZE(wm8731_corgi_controls),
300 .dapm_widgets = wm8731_dapm_widgets,
301 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
302 .dapm_routes = corgi_audio_map,
303 .num_dapm_routes = ARRAY_SIZE(corgi_audio_map),
304 };
305
corgi_probe(struct platform_device * pdev)306 static int __devinit corgi_probe(struct platform_device *pdev)
307 {
308 struct snd_soc_card *card = &corgi;
309 int ret;
310
311 card->dev = &pdev->dev;
312
313 ret = snd_soc_register_card(card);
314 if (ret)
315 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
316 ret);
317 return ret;
318 }
319
corgi_remove(struct platform_device * pdev)320 static int __devexit corgi_remove(struct platform_device *pdev)
321 {
322 struct snd_soc_card *card = platform_get_drvdata(pdev);
323
324 snd_soc_unregister_card(card);
325 return 0;
326 }
327
328 static struct platform_driver corgi_driver = {
329 .driver = {
330 .name = "corgi-audio",
331 .owner = THIS_MODULE,
332 },
333 .probe = corgi_probe,
334 .remove = __devexit_p(corgi_remove),
335 };
336
337 module_platform_driver(corgi_driver);
338
339 /* Module information */
340 MODULE_AUTHOR("Richard Purdie");
341 MODULE_DESCRIPTION("ALSA SoC Corgi");
342 MODULE_LICENSE("GPL");
343 MODULE_ALIAS("platform:corgi-audio");
344