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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         snd_soc_dapm_mutex_lock(dapm);
 51 
 52         /* set up jack connection */
 53         switch (corgi_jack_func) {
 54         case CORGI_HP:
 55                 /* set = unmute headphone */
 56                 gpio_set_value(CORGI_GPIO_MUTE_L, 1);
 57                 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
 58                 snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 59                 snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 60                 snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
 61                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 62                 break;
 63         case CORGI_MIC:
 64                 /* reset = mute headphone */
 65                 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
 66                 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
 67                 snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
 68                 snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 69                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 70                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 71                 break;
 72         case CORGI_LINE:
 73                 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
 74                 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
 75                 snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 76                 snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
 77                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 78                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 79                 break;
 80         case CORGI_HEADSET:
 81                 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
 82                 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
 83                 snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
 84                 snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 85                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 86                 snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
 87                 break;
 88         }
 89 
 90         if (corgi_spk_func == CORGI_SPK_ON)
 91                 snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
 92         else
 93                 snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
 94 
 95         /* signal a DAPM event */
 96         snd_soc_dapm_sync_unlocked(dapm);
 97 
 98         snd_soc_dapm_mutex_unlock(dapm);
 99 }
100 
101 static int corgi_startup(struct snd_pcm_substream *substream)
102 {
103         struct snd_soc_pcm_runtime *rtd = substream->private_data;
104 
105         /* check the jack status at stream startup */
106         corgi_ext_control(&rtd->card->dapm);
107 
108         return 0;
109 }
110 
111 /* we need to unmute the HP at shutdown as the mute burns power on corgi */
112 static void corgi_shutdown(struct snd_pcm_substream *substream)
113 {
114         /* set = unmute headphone */
115         gpio_set_value(CORGI_GPIO_MUTE_L, 1);
116         gpio_set_value(CORGI_GPIO_MUTE_R, 1);
117 }
118 
119 static int corgi_hw_params(struct snd_pcm_substream *substream,
120         struct snd_pcm_hw_params *params)
121 {
122         struct snd_soc_pcm_runtime *rtd = substream->private_data;
123         struct snd_soc_dai *codec_dai = rtd->codec_dai;
124         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
125         unsigned int clk = 0;
126         int ret = 0;
127 
128         switch (params_rate(params)) {
129         case 8000:
130         case 16000:
131         case 48000:
132         case 96000:
133                 clk = 12288000;
134                 break;
135         case 11025:
136         case 22050:
137         case 44100:
138                 clk = 11289600;
139                 break;
140         }
141 
142         /* set the codec system clock for DAC and ADC */
143         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
144                 SND_SOC_CLOCK_IN);
145         if (ret < 0)
146                 return ret;
147 
148         /* set the I2S system clock as input (unused) */
149         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
150                 SND_SOC_CLOCK_IN);
151         if (ret < 0)
152                 return ret;
153 
154         return 0;
155 }
156 
157 static struct snd_soc_ops corgi_ops = {
158         .startup = corgi_startup,
159         .hw_params = corgi_hw_params,
160         .shutdown = corgi_shutdown,
161 };
162 
163 static int corgi_get_jack(struct snd_kcontrol *kcontrol,
164         struct snd_ctl_elem_value *ucontrol)
165 {
166         ucontrol->value.integer.value[0] = corgi_jack_func;
167         return 0;
168 }
169 
170 static int corgi_set_jack(struct snd_kcontrol *kcontrol,
171         struct snd_ctl_elem_value *ucontrol)
172 {
173         struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
174 
175         if (corgi_jack_func == ucontrol->value.integer.value[0])
176                 return 0;
177 
178         corgi_jack_func = ucontrol->value.integer.value[0];
179         corgi_ext_control(&card->dapm);
180         return 1;
181 }
182 
183 static int corgi_get_spk(struct snd_kcontrol *kcontrol,
184         struct snd_ctl_elem_value *ucontrol)
185 {
186         ucontrol->value.integer.value[0] = corgi_spk_func;
187         return 0;
188 }
189 
190 static int corgi_set_spk(struct snd_kcontrol *kcontrol,
191         struct snd_ctl_elem_value *ucontrol)
192 {
193         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
194 
195         if (corgi_spk_func == ucontrol->value.integer.value[0])
196                 return 0;
197 
198         corgi_spk_func = ucontrol->value.integer.value[0];
199         corgi_ext_control(&card->dapm);
200         return 1;
201 }
202 
203 static int corgi_amp_event(struct snd_soc_dapm_widget *w,
204         struct snd_kcontrol *k, int event)
205 {
206         gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
207         return 0;
208 }
209 
210 static int corgi_mic_event(struct snd_soc_dapm_widget *w,
211         struct snd_kcontrol *k, int event)
212 {
213         gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
214         return 0;
215 }
216 
217 /* corgi machine dapm widgets */
218 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
219 SND_SOC_DAPM_HP("Headphone Jack", NULL),
220 SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
221 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
222 SND_SOC_DAPM_LINE("Line Jack", NULL),
223 SND_SOC_DAPM_HP("Headset Jack", NULL),
224 };
225 
226 /* Corgi machine audio map (connections to the codec pins) */
227 static const struct snd_soc_dapm_route corgi_audio_map[] = {
228 
229         /* headset Jack  - in = micin, out = LHPOUT*/
230         {"Headset Jack", NULL, "LHPOUT"},
231 
232         /* headphone connected to LHPOUT1, RHPOUT1 */
233         {"Headphone Jack", NULL, "LHPOUT"},
234         {"Headphone Jack", NULL, "RHPOUT"},
235 
236         /* speaker connected to LOUT, ROUT */
237         {"Ext Spk", NULL, "ROUT"},
238         {"Ext Spk", NULL, "LOUT"},
239 
240         /* mic is connected to MICIN (via right channel of headphone jack) */
241         {"MICIN", NULL, "Mic Jack"},
242 
243         /* Same as the above but no mic bias for line signals */
244         {"MICIN", NULL, "Line Jack"},
245 };
246 
247 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
248         "Off"};
249 static const char *spk_function[] = {"On", "Off"};
250 static const struct soc_enum corgi_enum[] = {
251         SOC_ENUM_SINGLE_EXT(5, jack_function),
252         SOC_ENUM_SINGLE_EXT(2, spk_function),
253 };
254 
255 static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
256         SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
257                 corgi_set_jack),
258         SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
259                 corgi_set_spk),
260 };
261 
262 /* corgi digital audio interface glue - connects codec <--> CPU */
263 static struct snd_soc_dai_link corgi_dai = {
264         .name = "WM8731",
265         .stream_name = "WM8731",
266         .cpu_dai_name = "pxa2xx-i2s",
267         .codec_dai_name = "wm8731-hifi",
268         .platform_name = "pxa-pcm-audio",
269         .codec_name = "wm8731.0-001b",
270         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
271                    SND_SOC_DAIFMT_CBS_CFS,
272         .ops = &corgi_ops,
273 };
274 
275 /* corgi audio machine driver */
276 static struct snd_soc_card corgi = {
277         .name = "Corgi",
278         .owner = THIS_MODULE,
279         .dai_link = &corgi_dai,
280         .num_links = 1,
281 
282         .controls = wm8731_corgi_controls,
283         .num_controls = ARRAY_SIZE(wm8731_corgi_controls),
284         .dapm_widgets = wm8731_dapm_widgets,
285         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
286         .dapm_routes = corgi_audio_map,
287         .num_dapm_routes = ARRAY_SIZE(corgi_audio_map),
288         .fully_routed = true,
289 };
290 
291 static int corgi_probe(struct platform_device *pdev)
292 {
293         struct snd_soc_card *card = &corgi;
294         int ret;
295 
296         card->dev = &pdev->dev;
297 
298         ret = snd_soc_register_card(card);
299         if (ret)
300                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
301                         ret);
302         return ret;
303 }
304 
305 static int corgi_remove(struct platform_device *pdev)
306 {
307         struct snd_soc_card *card = platform_get_drvdata(pdev);
308 
309         snd_soc_unregister_card(card);
310         return 0;
311 }
312 
313 static struct platform_driver corgi_driver = {
314         .driver         = {
315                 .name   = "corgi-audio",
316                 .pm     = &snd_soc_pm_ops,
317         },
318         .probe          = corgi_probe,
319         .remove         = corgi_remove,
320 };
321 
322 module_platform_driver(corgi_driver);
323 
324 /* Module information */
325 MODULE_AUTHOR("Richard Purdie");
326 MODULE_DESCRIPTION("ALSA SoC Corgi");
327 MODULE_LICENSE("GPL");
328 MODULE_ALIAS("platform:corgi-audio");
329 

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