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Linux/sound/soc/pxa/corgi.c

  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 
 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 
 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 */
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 
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 
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 
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 
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 
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 
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 
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  */
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 
306 static int 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 
320 static int 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                 .pm     = &snd_soc_pm_ops,
333         },
334         .probe          = corgi_probe,
335         .remove         = corgi_remove,
336 };
337 
338 module_platform_driver(corgi_driver);
339 
340 /* Module information */
341 MODULE_AUTHOR("Richard Purdie");
342 MODULE_DESCRIPTION("ALSA SoC Corgi");
343 MODULE_LICENSE("GPL");
344 MODULE_ALIAS("platform:corgi-audio");
345 

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