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Linux/sound/soc/pxa/poodle.c

  1 /*
  2  * poodle.c  --  SoC audio for Poodle
  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 
 17 #include <linux/module.h>
 18 #include <linux/moduleparam.h>
 19 #include <linux/timer.h>
 20 #include <linux/i2c.h>
 21 #include <linux/interrupt.h>
 22 #include <linux/platform_device.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 <asm/hardware/locomo.h>
 29 #include <mach/poodle.h>
 30 #include <mach/audio.h>
 31 
 32 #include "../codecs/wm8731.h"
 33 #include "pxa2xx-i2s.h"
 34 
 35 #define POODLE_HP        1
 36 #define POODLE_HP_OFF    0
 37 #define POODLE_SPK_ON    1
 38 #define POODLE_SPK_OFF   0
 39 
 40  /* audio clock in Hz - rounded from 12.235MHz */
 41 #define POODLE_AUDIO_CLOCK 12288000
 42 
 43 static int poodle_jack_func;
 44 static int poodle_spk_func;
 45 
 46 static void poodle_ext_control(struct snd_soc_dapm_context *dapm)
 47 {
 48         /* set up jack connection */
 49         if (poodle_jack_func == POODLE_HP) {
 50                 /* set = unmute headphone */
 51                 locomo_gpio_write(&poodle_locomo_device.dev,
 52                         POODLE_LOCOMO_GPIO_MUTE_L, 1);
 53                 locomo_gpio_write(&poodle_locomo_device.dev,
 54                         POODLE_LOCOMO_GPIO_MUTE_R, 1);
 55                 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
 56         } else {
 57                 locomo_gpio_write(&poodle_locomo_device.dev,
 58                         POODLE_LOCOMO_GPIO_MUTE_L, 0);
 59                 locomo_gpio_write(&poodle_locomo_device.dev,
 60                         POODLE_LOCOMO_GPIO_MUTE_R, 0);
 61                 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
 62         }
 63 
 64         /* set the enpoints to their new connetion states */
 65         if (poodle_spk_func == POODLE_SPK_ON)
 66                 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
 67         else
 68                 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
 69 
 70         /* signal a DAPM event */
 71         snd_soc_dapm_sync(dapm);
 72 }
 73 
 74 static int poodle_startup(struct snd_pcm_substream *substream)
 75 {
 76         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 77         struct snd_soc_codec *codec = rtd->codec;
 78 
 79         mutex_lock(&codec->mutex);
 80 
 81         /* check the jack status at stream startup */
 82         poodle_ext_control(&codec->dapm);
 83 
 84         mutex_unlock(&codec->mutex);
 85 
 86         return 0;
 87 }
 88 
 89 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
 90 static void poodle_shutdown(struct snd_pcm_substream *substream)
 91 {
 92         /* set = unmute headphone */
 93         locomo_gpio_write(&poodle_locomo_device.dev,
 94                 POODLE_LOCOMO_GPIO_MUTE_L, 1);
 95         locomo_gpio_write(&poodle_locomo_device.dev,
 96                 POODLE_LOCOMO_GPIO_MUTE_R, 1);
 97 }
 98 
 99 static int poodle_hw_params(struct snd_pcm_substream *substream,
100         struct snd_pcm_hw_params *params)
101 {
102         struct snd_soc_pcm_runtime *rtd = substream->private_data;
103         struct snd_soc_dai *codec_dai = rtd->codec_dai;
104         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
105         unsigned int clk = 0;
106         int ret = 0;
107 
108         switch (params_rate(params)) {
109         case 8000:
110         case 16000:
111         case 48000:
112         case 96000:
113                 clk = 12288000;
114                 break;
115         case 11025:
116         case 22050:
117         case 44100:
118                 clk = 11289600;
119                 break;
120         }
121 
122         /* set the codec system clock for DAC and ADC */
123         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
124                 SND_SOC_CLOCK_IN);
125         if (ret < 0)
126                 return ret;
127 
128         /* set the I2S system clock as input (unused) */
129         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
130                 SND_SOC_CLOCK_IN);
131         if (ret < 0)
132                 return ret;
133 
134         return 0;
135 }
136 
137 static struct snd_soc_ops poodle_ops = {
138         .startup = poodle_startup,
139         .hw_params = poodle_hw_params,
140         .shutdown = poodle_shutdown,
141 };
142 
143 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
144         struct snd_ctl_elem_value *ucontrol)
145 {
146         ucontrol->value.integer.value[0] = poodle_jack_func;
147         return 0;
148 }
149 
150 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
151         struct snd_ctl_elem_value *ucontrol)
152 {
153         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
154 
155         if (poodle_jack_func == ucontrol->value.integer.value[0])
156                 return 0;
157 
158         poodle_jack_func = ucontrol->value.integer.value[0];
159         poodle_ext_control(&card->dapm);
160         return 1;
161 }
162 
163 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
164         struct snd_ctl_elem_value *ucontrol)
165 {
166         ucontrol->value.integer.value[0] = poodle_spk_func;
167         return 0;
168 }
169 
170 static int poodle_set_spk(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 (poodle_spk_func == ucontrol->value.integer.value[0])
176                 return 0;
177 
178         poodle_spk_func = ucontrol->value.integer.value[0];
179         poodle_ext_control(&card->dapm);
180         return 1;
181 }
182 
183 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
184         struct snd_kcontrol *k, int event)
185 {
186         if (SND_SOC_DAPM_EVENT_ON(event))
187                 locomo_gpio_write(&poodle_locomo_device.dev,
188                         POODLE_LOCOMO_GPIO_AMP_ON, 0);
189         else
190                 locomo_gpio_write(&poodle_locomo_device.dev,
191                         POODLE_LOCOMO_GPIO_AMP_ON, 1);
192 
193         return 0;
194 }
195 
196 /* poodle machine dapm widgets */
197 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
198 SND_SOC_DAPM_HP("Headphone Jack", NULL),
199 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
200 };
201 
202 /* Corgi machine connections to the codec pins */
203 static const struct snd_soc_dapm_route poodle_audio_map[] = {
204 
205         /* headphone connected to LHPOUT1, RHPOUT1 */
206         {"Headphone Jack", NULL, "LHPOUT"},
207         {"Headphone Jack", NULL, "RHPOUT"},
208 
209         /* speaker connected to LOUT, ROUT */
210         {"Ext Spk", NULL, "ROUT"},
211         {"Ext Spk", NULL, "LOUT"},
212 };
213 
214 static const char *jack_function[] = {"Off", "Headphone"};
215 static const char *spk_function[] = {"Off", "On"};
216 static const struct soc_enum poodle_enum[] = {
217         SOC_ENUM_SINGLE_EXT(2, jack_function),
218         SOC_ENUM_SINGLE_EXT(2, spk_function),
219 };
220 
221 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
222         SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
223                 poodle_set_jack),
224         SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
225                 poodle_set_spk),
226 };
227 
228 /*
229  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
230  */
231 static int poodle_wm8731_init(struct snd_soc_pcm_runtime *rtd)
232 {
233         struct snd_soc_codec *codec = rtd->codec;
234         struct snd_soc_dapm_context *dapm = &codec->dapm;
235 
236         snd_soc_dapm_nc_pin(dapm, "LLINEIN");
237         snd_soc_dapm_nc_pin(dapm, "RLINEIN");
238         snd_soc_dapm_enable_pin(dapm, "MICIN");
239 
240         return 0;
241 }
242 
243 /* poodle digital audio interface glue - connects codec <--> CPU */
244 static struct snd_soc_dai_link poodle_dai = {
245         .name = "WM8731",
246         .stream_name = "WM8731",
247         .cpu_dai_name = "pxa2xx-i2s",
248         .codec_dai_name = "wm8731-hifi",
249         .platform_name = "pxa-pcm-audio",
250         .codec_name = "wm8731.0-001b",
251         .init = poodle_wm8731_init,
252         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
253                    SND_SOC_DAIFMT_CBS_CFS,
254         .ops = &poodle_ops,
255 };
256 
257 /* poodle audio machine driver */
258 static struct snd_soc_card poodle = {
259         .name = "Poodle",
260         .dai_link = &poodle_dai,
261         .num_links = 1,
262         .owner = THIS_MODULE,
263 
264         .controls = wm8731_poodle_controls,
265         .num_controls = ARRAY_SIZE(wm8731_poodle_controls),
266         .dapm_widgets = wm8731_dapm_widgets,
267         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
268         .dapm_routes = poodle_audio_map,
269         .num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
270 };
271 
272 static int poodle_probe(struct platform_device *pdev)
273 {
274         struct snd_soc_card *card = &poodle;
275         int ret;
276 
277         locomo_gpio_set_dir(&poodle_locomo_device.dev,
278                 POODLE_LOCOMO_GPIO_AMP_ON, 0);
279         /* should we mute HP at startup - burning power ?*/
280         locomo_gpio_set_dir(&poodle_locomo_device.dev,
281                 POODLE_LOCOMO_GPIO_MUTE_L, 0);
282         locomo_gpio_set_dir(&poodle_locomo_device.dev,
283                 POODLE_LOCOMO_GPIO_MUTE_R, 0);
284 
285         card->dev = &pdev->dev;
286 
287         ret = snd_soc_register_card(card);
288         if (ret)
289                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
290                         ret);
291         return ret;
292 }
293 
294 static int poodle_remove(struct platform_device *pdev)
295 {
296         struct snd_soc_card *card = platform_get_drvdata(pdev);
297 
298         snd_soc_unregister_card(card);
299         return 0;
300 }
301 
302 static struct platform_driver poodle_driver = {
303         .driver         = {
304                 .name   = "poodle-audio",
305                 .owner  = THIS_MODULE,
306                 .pm     = &snd_soc_pm_ops,
307         },
308         .probe          = poodle_probe,
309         .remove         = poodle_remove,
310 };
311 
312 module_platform_driver(poodle_driver);
313 
314 /* Module information */
315 MODULE_AUTHOR("Richard Purdie");
316 MODULE_DESCRIPTION("ALSA SoC Poodle");
317 MODULE_LICENSE("GPL");
318 MODULE_ALIAS("platform:poodle-audio");
319 

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