target/linux/xburst/files-2.6.32/sound/soc/jz4740/n516.c

   1 /*
   2  * Copyright (C) 2009, Yauhen Kharuzhy <jekhor@gmail.com>
   3  *  OpenInkpot project
   4  * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * You should have received a copy of the  GNU General Public License along
  11  * with this program; if not, write  to the Free Software Foundation, Inc.,
  12  * 675 Mass Ave, Cambridge, MA 02139, USA.
  13  *
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/platform_device.h>
  19 #include <sound/core.h>
  20 #include <sound/pcm.h>
  21 #include <sound/soc.h>
  22 #include <sound/soc-dapm.h>
  23 #include <sound/jack.h>
  24 #include <linux/gpio.h>
  25 #include <linux/workqueue.h>
  26
  27 #include "../codecs/jzcodec.h"
  28 #include "jz4740-pcm.h"
  29 #include "jz4740-i2s.h"
  30
  31 #include <asm/mach-jz4740/board-n516.h>
  32
  33 enum {
  34         N516_SPEAKER_AUTO = 0,
  35         N516_SPEAKER_OFF = 1,
  36         N516_SPEAKER_ON = 2,
  37 };
  38
  39 static int n516_speaker_mode;
  40 static struct snd_soc_codec *n516_codec;
  41 static struct work_struct n516_headphone_work;
  42
  43 static void n516_ext_control(void)
  44 {
  45         if (!n516_codec)
  46                 return;
  47
  48         switch (n516_speaker_mode) {
  49         case N516_SPEAKER_ON:
  50                 snd_soc_dapm_enable_pin(n516_codec, "Speaker");
  51                 break;
  52         case N516_SPEAKER_OFF:
  53                 snd_soc_dapm_disable_pin(n516_codec, "Speaker");
  54             break;
  55         case N516_SPEAKER_AUTO:
  56                 if (snd_soc_dapm_get_pin_status(n516_codec, "Headphone"))
  57                         snd_soc_dapm_disable_pin(n516_codec, "Speaker");
  58                 else
  59                         snd_soc_dapm_enable_pin(n516_codec, "Speaker");
  60                 break;
  61         default:
  62                 break;
  63         }
  64
  65     /* signal a DAPM event */
  66     snd_soc_dapm_sync(n516_codec);
  67 }
  68
  69 static int n516_speaker_event(struct snd_soc_dapm_widget *widget,
  70                              struct snd_kcontrol *ctrl, int event)
  71 {
  72         int on = !SND_SOC_DAPM_EVENT_OFF(event);
  73
  74         gpio_set_value(GPIO_SPEAKER_ENABLE, on);
  75
  76         return 0;
  77 }
  78
  79 static void n516_headphone_event_work(struct work_struct *work)
  80 {
  81         n516_ext_control();
  82 }
  83
  84 static int n516_headphone_event(struct snd_soc_dapm_widget *widget,
  85                              struct snd_kcontrol *ctrl, int event)
  86 {
  87         /* We can't call soc_dapm_sync from a event handler */
  88         if (event & (SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD))
  89                 schedule_work(&n516_headphone_work);
  90         return 0;
  91 }
  92
  93 static const struct snd_soc_dapm_widget n516_widgets[] = {
  94         SND_SOC_DAPM_SPK("Speaker", n516_speaker_event),
  95         SND_SOC_DAPM_HP("Headphone", n516_headphone_event),
  96         SND_SOC_DAPM_MIC("Mic", NULL),
  97 };
  98
  99 static const struct snd_soc_dapm_route n516_routes[] = {
 100         {"Mic", NULL, "MIC"},
 101         {"Speaker", NULL, "LOUT"},
 102         {"Speaker", NULL, "ROUT"},
 103         {"Headphone", NULL, "LOUT"},
 104         {"Headphone", NULL, "ROUT"},
 105 };
 106
 107 static const char *n516_speaker_modes[] = {"Auto", "Off", "On"};
 108 static const struct soc_enum n516_speaker_mode_enum =
 109         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(n516_speaker_modes), n516_speaker_modes);
 110
 111 static int n516_get_speaker_mode(struct snd_kcontrol *kcontrol,
 112         struct snd_ctl_elem_value *ucontrol)
 113 {
 114         ucontrol->value.integer.value[0] = n516_speaker_mode;
 115         return 0;
 116 }
 117
 118 static int n516_set_speaker_mode(struct snd_kcontrol *kcontrol,
 119         struct snd_ctl_elem_value *ucontrol)
 120 {
 121         if (n516_speaker_mode == ucontrol->value.integer.value[0])
 122                 return 0;
 123
 124         n516_speaker_mode = ucontrol->value.integer.value[0];
 125         n516_ext_control();
 126         return 1;
 127 }
 128
 129 static const struct snd_kcontrol_new n516_controls[] = {
 130         SOC_ENUM_EXT("Speaker Function", n516_speaker_mode_enum,
 131                 n516_get_speaker_mode, n516_set_speaker_mode),
 132 };
 133
 134 #define N516_DAIFMT (SND_SOC_DAIFMT_I2S | \
 135                         SND_SOC_DAIFMT_NB_NF | \
 136                         SND_SOC_DAIFMT_CBM_CFM)
 137
 138 static int n516_codec_init(struct snd_soc_codec *codec)
 139 {
 140         int ret;
 141         struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
 142         struct snd_soc_dai *codec_dai = codec->socdev->card->dai_link->codec_dai;
 143
 144         n516_codec = codec;
 145
 146         snd_soc_dapm_nc_pin(codec, "LIN");
 147         snd_soc_dapm_nc_pin(codec, "RIN");
 148
 149         ret = snd_soc_dai_set_fmt(codec_dai, N516_DAIFMT);
 150         if (ret < 0) {
 151                 dev_err(codec->dev, "Failed to set codec dai format: %d\n", ret);
 152                 return ret;
 153         }
 154
 155         ret = snd_soc_dai_set_fmt(cpu_dai, N516_DAIFMT);
 156         if (ret < 0) {
 157                 dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
 158                 return ret;
 159         }
 160
 161         ret = snd_soc_dai_set_sysclk(codec_dai, JZCODEC_SYSCLK, 111,
 162                 SND_SOC_CLOCK_IN);
 163         if (ret < 0) {
 164                 dev_err(codec->dev, "Failed to set codec dai sysclk: %d\n", ret);
 165                 return ret;
 166         }
 167
 168         ret = snd_soc_add_controls(codec, n516_controls,
 169                 ARRAY_SIZE(n516_controls));
 170         if (ret) {
 171                 dev_err(codec->dev, "Failed to add controls: %d\n", ret);
 172                 return ret;
 173         }
 174
 175
 176         ret = snd_soc_dapm_new_controls(codec, n516_widgets,
 177                 ARRAY_SIZE(n516_widgets));
 178         if (ret) {
 179                 dev_err(codec->dev, "Failed to add dapm controls: %d\n", ret);
 180                 return ret;
 181         }
 182
 183         ret = snd_soc_dapm_add_routes(codec, n516_routes, ARRAY_SIZE(n516_routes));
 184         if (ret) {
 185                 dev_err(codec->dev, "Failed to add dapm routes: %d\n", ret);
 186                 return ret;
 187         }
 188
 189         snd_soc_dapm_sync(codec);
 190
 191         return 0;
 192 }
 193
 194 static struct snd_soc_dai_link n516_dai = {
 195         .name = "jz-codec",
 196         .stream_name = "JZCODEC",
 197         .cpu_dai = &jz4740_i2s_dai,
 198         .codec_dai = &jz_codec_dai,
 199         .init = n516_codec_init,
 200 };
 201
 202 static struct snd_soc_card n516_card = {
 203         .name = "N516",
 204         .dai_link = &n516_dai,
 205         .num_links = 1,
 206         .platform = &jz4740_soc_platform,
 207 };
 208
 209 static struct snd_soc_device n516_snd_devdata = {
 210         .card = &n516_card,
 211         .codec_dev = &soc_codec_dev_jzcodec,
 212 };
 213
 214 static struct platform_device *n516_snd_device;
 215
 216 static struct snd_soc_jack n516_hp_jack;
 217
 218 static struct snd_soc_jack_pin n516_hp_pin = {
 219         .pin = "Headphone",
 220         .mask = SND_JACK_HEADPHONE,
 221 };
 222
 223 static struct snd_soc_jack_gpio n516_hp_gpio = {
 224         .gpio = GPIO_HPHONE_DETECT,
 225         .name = "Headphone detect",
 226         .report = SND_JACK_HEADPHONE,
 227         .debounce_time = 100,
 228 };
 229
 230 static int __init n516_add_headphone_jack(void)
 231 {
 232         int ret;
 233
 234         ret = snd_soc_jack_new(&n516_card, "Headphone jack",
 235                 SND_JACK_HEADPHONE, &n516_hp_jack);
 236         if (ret)
 237                 return ret;
 238
 239         ret = snd_soc_jack_add_pins(&n516_hp_jack, 1, &n516_hp_pin);
 240         if (ret)
 241                 return ret;
 242
 243         ret = snd_soc_jack_add_gpios(&n516_hp_jack, 1, &n516_hp_gpio);
 244
 245         return ret;
 246 }
 247
 248 static int __init n516_init(void)
 249 {
 250         int ret;
 251
 252         n516_snd_device = platform_device_alloc("soc-audio", -1);
 253
 254         if (!n516_snd_device)
 255                 return -ENOMEM;
 256
 257         ret = gpio_request(GPIO_SPEAKER_ENABLE, "Speaker enable");
 258         if (ret) {
 259                 pr_err("n516 snd: Failed to request SPEAKER_ENABLE GPIO(%d): %d\n",
 260                                 GPIO_SPEAKER_ENABLE, ret);
 261                 goto err_device_put;
 262         }
 263
 264         gpio_direction_output(GPIO_SPEAKER_ENABLE, 0);
 265         INIT_WORK(&n516_headphone_work, n516_headphone_event_work);
 266
 267         platform_set_drvdata(n516_snd_device, &n516_snd_devdata);
 268         n516_snd_devdata.dev = &n516_snd_device->dev;
 269         ret = platform_device_add(n516_snd_device);
 270         if (ret) {
 271                 pr_err("n516 snd: Failed to add snd soc device: %d\n", ret);
 272                 goto err_unset_pdata;
 273         }
 274
 275         ret = n516_add_headphone_jack();
 276         /* We can live without it, so just print a warning */
 277         if (ret)
 278                 pr_warning("n516 snd: Failed to initalise headphone jack: %d\n", ret);
 279
 280         return 0;
 281
 282 err_unset_pdata:
 283         platform_set_drvdata(n516_snd_device, NULL);
 284 /*err_gpio_free_speaker:*/
 285         gpio_free(GPIO_SPEAKER_ENABLE);
 286 err_device_put:
 287         platform_device_put(n516_snd_device);
 288
 289         return ret;
 290 }
 291 module_init(n516_init);
 292
 293 static void __exit n516_exit(void)
 294 {
 295         snd_soc_jack_free_gpios(&n516_hp_jack, 1, &n516_hp_gpio);
 296         gpio_free(GPIO_SPEAKER_ENABLE);
 297         platform_device_unregister(n516_snd_device);
 298 }
 299 module_exit(n516_exit);
 300
 301 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 302 MODULE_DESCRIPTION("ALSA SoC N516 Audio support");
 303 MODULE_LICENSE("GPL v2");