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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 
 78         /* check the jack status at stream startup */
 79         poodle_ext_control(&rtd->card->dapm);
 80 
 81         return 0;
 82 }
 83 
 84 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
 85 static void poodle_shutdown(struct snd_pcm_substream *substream)
 86 {
 87         /* set = unmute headphone */
 88         locomo_gpio_write(&poodle_locomo_device.dev,
 89                 POODLE_LOCOMO_GPIO_MUTE_L, 1);
 90         locomo_gpio_write(&poodle_locomo_device.dev,
 91                 POODLE_LOCOMO_GPIO_MUTE_R, 1);
 92 }
 93 
 94 static int poodle_hw_params(struct snd_pcm_substream *substream,
 95         struct snd_pcm_hw_params *params)
 96 {
 97         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 98         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 99         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
100         unsigned int clk = 0;
101         int ret = 0;
102 
103         switch (params_rate(params)) {
104         case 8000:
105         case 16000:
106         case 48000:
107         case 96000:
108                 clk = 12288000;
109                 break;
110         case 11025:
111         case 22050:
112         case 44100:
113                 clk = 11289600;
114                 break;
115         }
116 
117         /* set the codec system clock for DAC and ADC */
118         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
119                 SND_SOC_CLOCK_IN);
120         if (ret < 0)
121                 return ret;
122 
123         /* set the I2S system clock as input (unused) */
124         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
125                 SND_SOC_CLOCK_IN);
126         if (ret < 0)
127                 return ret;
128 
129         return 0;
130 }
131 
132 static struct snd_soc_ops poodle_ops = {
133         .startup = poodle_startup,
134         .hw_params = poodle_hw_params,
135         .shutdown = poodle_shutdown,
136 };
137 
138 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
139         struct snd_ctl_elem_value *ucontrol)
140 {
141         ucontrol->value.enumerated.item[0] = poodle_jack_func;
142         return 0;
143 }
144 
145 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
146         struct snd_ctl_elem_value *ucontrol)
147 {
148         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
149 
150         if (poodle_jack_func == ucontrol->value.enumerated.item[0])
151                 return 0;
152 
153         poodle_jack_func = ucontrol->value.enumerated.item[0];
154         poodle_ext_control(&card->dapm);
155         return 1;
156 }
157 
158 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
159         struct snd_ctl_elem_value *ucontrol)
160 {
161         ucontrol->value.enumerated.item[0] = poodle_spk_func;
162         return 0;
163 }
164 
165 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
166         struct snd_ctl_elem_value *ucontrol)
167 {
168         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
169 
170         if (poodle_spk_func == ucontrol->value.enumerated.item[0])
171                 return 0;
172 
173         poodle_spk_func = ucontrol->value.enumerated.item[0];
174         poodle_ext_control(&card->dapm);
175         return 1;
176 }
177 
178 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
179         struct snd_kcontrol *k, int event)
180 {
181         if (SND_SOC_DAPM_EVENT_ON(event))
182                 locomo_gpio_write(&poodle_locomo_device.dev,
183                         POODLE_LOCOMO_GPIO_AMP_ON, 0);
184         else
185                 locomo_gpio_write(&poodle_locomo_device.dev,
186                         POODLE_LOCOMO_GPIO_AMP_ON, 1);
187 
188         return 0;
189 }
190 
191 /* poodle machine dapm widgets */
192 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
193 SND_SOC_DAPM_HP("Headphone Jack", NULL),
194 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
195 SND_SOC_DAPM_MIC("Microphone", NULL),
196 };
197 
198 /* Corgi machine connections to the codec pins */
199 static const struct snd_soc_dapm_route poodle_audio_map[] = {
200 
201         /* headphone connected to LHPOUT1, RHPOUT1 */
202         {"Headphone Jack", NULL, "LHPOUT"},
203         {"Headphone Jack", NULL, "RHPOUT"},
204 
205         /* speaker connected to LOUT, ROUT */
206         {"Ext Spk", NULL, "ROUT"},
207         {"Ext Spk", NULL, "LOUT"},
208 
209         {"MICIN", NULL, "Microphone"},
210 };
211 
212 static const char *jack_function[] = {"Off", "Headphone"};
213 static const char *spk_function[] = {"Off", "On"};
214 static const struct soc_enum poodle_enum[] = {
215         SOC_ENUM_SINGLE_EXT(2, jack_function),
216         SOC_ENUM_SINGLE_EXT(2, spk_function),
217 };
218 
219 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
220         SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
221                 poodle_set_jack),
222         SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
223                 poodle_set_spk),
224 };
225 
226 /* poodle digital audio interface glue - connects codec <--> CPU */
227 static struct snd_soc_dai_link poodle_dai = {
228         .name = "WM8731",
229         .stream_name = "WM8731",
230         .cpu_dai_name = "pxa2xx-i2s",
231         .codec_dai_name = "wm8731-hifi",
232         .platform_name = "pxa-pcm-audio",
233         .codec_name = "wm8731.0-001b",
234         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
235                    SND_SOC_DAIFMT_CBS_CFS,
236         .ops = &poodle_ops,
237 };
238 
239 /* poodle audio machine driver */
240 static struct snd_soc_card poodle = {
241         .name = "Poodle",
242         .dai_link = &poodle_dai,
243         .num_links = 1,
244         .owner = THIS_MODULE,
245 
246         .controls = wm8731_poodle_controls,
247         .num_controls = ARRAY_SIZE(wm8731_poodle_controls),
248         .dapm_widgets = wm8731_dapm_widgets,
249         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
250         .dapm_routes = poodle_audio_map,
251         .num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
252         .fully_routed = true,
253 };
254 
255 static int poodle_probe(struct platform_device *pdev)
256 {
257         struct snd_soc_card *card = &poodle;
258         int ret;
259 
260         locomo_gpio_set_dir(&poodle_locomo_device.dev,
261                 POODLE_LOCOMO_GPIO_AMP_ON, 0);
262         /* should we mute HP at startup - burning power ?*/
263         locomo_gpio_set_dir(&poodle_locomo_device.dev,
264                 POODLE_LOCOMO_GPIO_MUTE_L, 0);
265         locomo_gpio_set_dir(&poodle_locomo_device.dev,
266                 POODLE_LOCOMO_GPIO_MUTE_R, 0);
267 
268         card->dev = &pdev->dev;
269 
270         ret = devm_snd_soc_register_card(&pdev->dev, card);
271         if (ret)
272                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
273                         ret);
274         return ret;
275 }
276 
277 static struct platform_driver poodle_driver = {
278         .driver         = {
279                 .name   = "poodle-audio",
280                 .pm     = &snd_soc_pm_ops,
281         },
282         .probe          = poodle_probe,
283 };
284 
285 module_platform_driver(poodle_driver);
286 
287 /* Module information */
288 MODULE_AUTHOR("Richard Purdie");
289 MODULE_DESCRIPTION("ALSA SoC Poodle");
290 MODULE_LICENSE("GPL");
291 MODULE_ALIAS("platform:poodle-audio");
292 

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