target/linux/xburst/patches-2.6.35/066-n516-sound.patch

   1 From 9a03a5a5c16698426ed181862b0dd30a0e0aad1a Mon Sep 17 00:00:00 2001
   2 From: Lars-Peter Clausen <lars@metafoo.de>
   3 Date: Sun, 1 Aug 2010 21:34:54 +0200
   4 Subject: [PATCH] Add N516 sound SoC board driver
   5
   6 ---
   7  sound/soc/jz4740/Kconfig  |    8 ++
   8  sound/soc/jz4740/Makefile |    2 +
   9  sound/soc/jz4740/n516.c   |  303 +++++++++++++++++++++++++++++++++++++++++++++
  10  3 files changed, 313 insertions(+), 0 deletions(-)
  11  create mode 100644 sound/soc/jz4740/n516.c
  12
  13 --- a/sound/soc/jz4740/Kconfig
  14 +++ b/sound/soc/jz4740/Kconfig
  15 @@ -21,3 +21,11 @@ config SND_JZ4740_SOC_QI_LB60
  16         help
  17           Say Y if you want to add support for ASoC audio on the Qi LB60 board
  18           a.k.a Qi Ben NanoNote.
  19 +
  20 +config SND_JZ4740_SOC_N516
  21 +       tristate "SoC Audio support for Hanvon N516 eBook reader"
  22 +       depends on SND_JZ4740_SOC && JZ4740_N516
  23 +       select SND_JZ4740_SOC_I2S
  24 +    select SND_SOC_JZCODEC
  25 +       help
  26 +         Say Y if you want to enable support for SoC audio on the Hanvon N516.
  27 --- a/sound/soc/jz4740/Makefile
  28 +++ b/sound/soc/jz4740/Makefile
  29 @@ -9,5 +9,7 @@ obj-$(CONFIG_SND_JZ4740_SOC_I2S) += snd-
  30
  31  # Jz4740 Machine Support
  32  snd-soc-qi-lb60-objs := qi_lb60.o
  33 +snd-soc-n516-objs := n516.o
  34
  35  obj-$(CONFIG_SND_JZ4740_SOC_QI_LB60) += snd-soc-qi-lb60.o
  36 +obj-$(CONFIG_SND_JZ4740_SOC_N516) += snd-soc-n516.o
  37 --- /dev/null
  38 +++ b/sound/soc/jz4740/n516.c
  39 @@ -0,0 +1,303 @@
  40 +/*
  41 + * Copyright (C) 2009, Yauhen Kharuzhy <jekhor@gmail.com>
  42 + *  OpenInkpot project
  43 + * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
  44 + *
  45 + * This program is free software; you can redistribute it and/or modify
  46 + * it under the terms of the GNU General Public License version 2 as
  47 + * published by the Free Software Foundation.
  48 + *
  49 + * You should have received a copy of the  GNU General Public License along
  50 + * with this program; if not, write  to the Free Software Foundation, Inc.,
  51 + * 675 Mass Ave, Cambridge, MA 02139, USA.
  52 + *
  53 + */
  54 +
  55 +#include <linux/module.h>
  56 +#include <linux/interrupt.h>
  57 +#include <linux/platform_device.h>
  58 +#include <sound/core.h>
  59 +#include <sound/pcm.h>
  60 +#include <sound/soc.h>
  61 +#include <sound/soc-dapm.h>
  62 +#include <sound/jack.h>
  63 +#include <linux/gpio.h>
  64 +#include <linux/workqueue.h>
  65 +
  66 +#include "../codecs/jzcodec.h"
  67 +#include "jz4740-pcm.h"
  68 +#include "jz4740-i2s.h"
  69 +
  70 +#include <asm/mach-jz4740/board-n516.h>
  71 +
  72 +enum {
  73 +       N516_SPEAKER_AUTO = 0,
  74 +       N516_SPEAKER_OFF = 1,
  75 +       N516_SPEAKER_ON = 2,
  76 +};
  77 +
  78 +static int n516_speaker_mode;
  79 +static struct snd_soc_codec *n516_codec;
  80 +static struct work_struct n516_headphone_work;
  81 +
  82 +static void n516_ext_control(void)
  83 +{
  84 +       if (!n516_codec)
  85 +               return;
  86 +
  87 +       switch (n516_speaker_mode) {
  88 +       case N516_SPEAKER_ON:
  89 +               snd_soc_dapm_enable_pin(n516_codec, "Speaker");
  90 +               break;
  91 +       case N516_SPEAKER_OFF:
  92 +               snd_soc_dapm_disable_pin(n516_codec, "Speaker");
  93 +           break;
  94 +       case N516_SPEAKER_AUTO:
  95 +               if (snd_soc_dapm_get_pin_status(n516_codec, "Headphone"))
  96 +                       snd_soc_dapm_disable_pin(n516_codec, "Speaker");
  97 +               else
  98 +                       snd_soc_dapm_enable_pin(n516_codec, "Speaker");
  99 +               break;
 100 +       default:
 101 +               break;
 102 +       }
 103 +
 104 +    /* signal a DAPM event */
 105 +    snd_soc_dapm_sync(n516_codec);
 106 +}
 107 +
 108 +static int n516_speaker_event(struct snd_soc_dapm_widget *widget,
 109 +                            struct snd_kcontrol *ctrl, int event)
 110 +{
 111 +       int on = !SND_SOC_DAPM_EVENT_OFF(event);
 112 +
 113 +       gpio_set_value(GPIO_SPEAKER_ENABLE, on);
 114 +
 115 +       return 0;
 116 +}
 117 +
 118 +static void n516_headphone_event_work(struct work_struct *work)
 119 +{
 120 +       n516_ext_control();
 121 +}
 122 +
 123 +static int n516_headphone_event(struct snd_soc_dapm_widget *widget,
 124 +                            struct snd_kcontrol *ctrl, int event)
 125 +{
 126 +       /* We can't call soc_dapm_sync from a event handler */
 127 +       if (event & (SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD))
 128 +               schedule_work(&n516_headphone_work);
 129 +       return 0;
 130 +}
 131 +
 132 +static const struct snd_soc_dapm_widget n516_widgets[] = {
 133 +       SND_SOC_DAPM_SPK("Speaker", n516_speaker_event),
 134 +       SND_SOC_DAPM_HP("Headphone", n516_headphone_event),
 135 +       SND_SOC_DAPM_MIC("Mic", NULL),
 136 +};
 137 +
 138 +static const struct snd_soc_dapm_route n516_routes[] = {
 139 +       {"Mic", NULL, "MIC"},
 140 +       {"Speaker", NULL, "LOUT"},
 141 +       {"Speaker", NULL, "ROUT"},
 142 +       {"Headphone", NULL, "LOUT"},
 143 +       {"Headphone", NULL, "ROUT"},
 144 +};
 145 +
 146 +static const char *n516_speaker_modes[] = {"Auto", "Off", "On"};
 147 +static const struct soc_enum n516_speaker_mode_enum =
 148 +       SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(n516_speaker_modes), n516_speaker_modes);
 149 +
 150 +static int n516_get_speaker_mode(struct snd_kcontrol *kcontrol,
 151 +       struct snd_ctl_elem_value *ucontrol)
 152 +{
 153 +       ucontrol->value.integer.value[0] = n516_speaker_mode;
 154 +       return 0;
 155 +}
 156 +
 157 +static int n516_set_speaker_mode(struct snd_kcontrol *kcontrol,
 158 +       struct snd_ctl_elem_value *ucontrol)
 159 +{
 160 +       if (n516_speaker_mode == ucontrol->value.integer.value[0])
 161 +               return 0;
 162 +
 163 +       n516_speaker_mode = ucontrol->value.integer.value[0];
 164 +       n516_ext_control();
 165 +       return 1;
 166 +}
 167 +
 168 +static const struct snd_kcontrol_new n516_controls[] = {
 169 +       SOC_ENUM_EXT("Speaker Function", n516_speaker_mode_enum,
 170 +               n516_get_speaker_mode, n516_set_speaker_mode),
 171 +};
 172 +
 173 +#define N516_DAIFMT (SND_SOC_DAIFMT_I2S | \
 174 +                       SND_SOC_DAIFMT_NB_NF | \
 175 +                       SND_SOC_DAIFMT_CBM_CFM)
 176 +
 177 +static int n516_codec_init(struct snd_soc_codec *codec)
 178 +{
 179 +       int ret;
 180 +       struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
 181 +       struct snd_soc_dai *codec_dai = codec->socdev->card->dai_link->codec_dai;
 182 +
 183 +       n516_codec = codec;
 184 +
 185 +       snd_soc_dapm_nc_pin(codec, "LIN");
 186 +       snd_soc_dapm_nc_pin(codec, "RIN");
 187 +
 188 +       ret = snd_soc_dai_set_fmt(codec_dai, N516_DAIFMT);
 189 +       if (ret < 0) {
 190 +               dev_err(codec->dev, "Failed to set codec dai format: %d\n", ret);
 191 +               return ret;
 192 +       }
 193 +
 194 +       ret = snd_soc_dai_set_fmt(cpu_dai, N516_DAIFMT);
 195 +       if (ret < 0) {
 196 +               dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
 197 +               return ret;
 198 +       }
 199 +
 200 +       ret = snd_soc_dai_set_sysclk(codec_dai, JZCODEC_SYSCLK, 111,
 201 +               SND_SOC_CLOCK_IN);
 202 +       if (ret < 0) {
 203 +               dev_err(codec->dev, "Failed to set codec dai sysclk: %d\n", ret);
 204 +               return ret;
 205 +       }
 206 +
 207 +       ret = snd_soc_add_controls(codec, n516_controls,
 208 +               ARRAY_SIZE(n516_controls));
 209 +       if (ret) {
 210 +               dev_err(codec->dev, "Failed to add controls: %d\n", ret);
 211 +               return ret;
 212 +       }
 213 +
 214 +
 215 +       ret = snd_soc_dapm_new_controls(codec, n516_widgets,
 216 +               ARRAY_SIZE(n516_widgets));
 217 +       if (ret) {
 218 +               dev_err(codec->dev, "Failed to add dapm controls: %d\n", ret);
 219 +               return ret;
 220 +       }
 221 +
 222 +       ret = snd_soc_dapm_add_routes(codec, n516_routes, ARRAY_SIZE(n516_routes));
 223 +       if (ret) {
 224 +               dev_err(codec->dev, "Failed to add dapm routes: %d\n", ret);
 225 +               return ret;
 226 +       }
 227 +
 228 +       snd_soc_dapm_sync(codec);
 229 +
 230 +       return 0;
 231 +}
 232 +
 233 +static struct snd_soc_dai_link n516_dai = {
 234 +       .name = "jz-codec",
 235 +       .stream_name = "JZCODEC",
 236 +       .cpu_dai = &jz4740_i2s_dai,
 237 +       .codec_dai = &jz_codec_dai,
 238 +       .init = n516_codec_init,
 239 +};
 240 +
 241 +static struct snd_soc_card n516_card = {
 242 +       .name = "N516",
 243 +       .dai_link = &n516_dai,
 244 +       .num_links = 1,
 245 +       .platform = &jz4740_soc_platform,
 246 +};
 247 +
 248 +static struct snd_soc_device n516_snd_devdata = {
 249 +       .card = &n516_card,
 250 +       .codec_dev = &soc_codec_dev_jzcodec,
 251 +};
 252 +
 253 +static struct platform_device *n516_snd_device;
 254 +
 255 +static struct snd_soc_jack n516_hp_jack;
 256 +
 257 +static struct snd_soc_jack_pin n516_hp_pin = {
 258 +       .pin = "Headphone",
 259 +       .mask = SND_JACK_HEADPHONE,
 260 +};
 261 +
 262 +static struct snd_soc_jack_gpio n516_hp_gpio = {
 263 +       .gpio = GPIO_HPHONE_DETECT,
 264 +       .name = "Headphone detect",
 265 +       .report = SND_JACK_HEADPHONE,
 266 +       .debounce_time = 100,
 267 +};
 268 +
 269 +static int __init n516_add_headphone_jack(void)
 270 +{
 271 +       int ret;
 272 +
 273 +       ret = snd_soc_jack_new(&n516_card, "Headphone jack",
 274 +               SND_JACK_HEADPHONE, &n516_hp_jack);
 275 +       if (ret)
 276 +               return ret;
 277 +
 278 +       ret = snd_soc_jack_add_pins(&n516_hp_jack, 1, &n516_hp_pin);
 279 +       if (ret)
 280 +               return ret;
 281 +
 282 +       ret = snd_soc_jack_add_gpios(&n516_hp_jack, 1, &n516_hp_gpio);
 283 +
 284 +       return ret;
 285 +}
 286 +
 287 +static int __init n516_init(void)
 288 +{
 289 +       int ret;
 290 +
 291 +       n516_snd_device = platform_device_alloc("soc-audio", -1);
 292 +
 293 +       if (!n516_snd_device)
 294 +               return -ENOMEM;
 295 +
 296 +       ret = gpio_request(GPIO_SPEAKER_ENABLE, "Speaker enable");
 297 +       if (ret) {
 298 +               pr_err("n516 snd: Failed to request SPEAKER_ENABLE GPIO(%d): %d\n",
 299 +                               GPIO_SPEAKER_ENABLE, ret);
 300 +               goto err_device_put;
 301 +       }
 302 +
 303 +       gpio_direction_output(GPIO_SPEAKER_ENABLE, 0);
 304 +       INIT_WORK(&n516_headphone_work, n516_headphone_event_work);
 305 +
 306 +       platform_set_drvdata(n516_snd_device, &n516_snd_devdata);
 307 +       n516_snd_devdata.dev = &n516_snd_device->dev;
 308 +       ret = platform_device_add(n516_snd_device);
 309 +       if (ret) {
 310 +               pr_err("n516 snd: Failed to add snd soc device: %d\n", ret);
 311 +               goto err_unset_pdata;
 312 +       }
 313 +
 314 +       ret = n516_add_headphone_jack();
 315 +       /* We can live without it, so just print a warning */
 316 +       if (ret)
 317 +               pr_warning("n516 snd: Failed to initalise headphone jack: %d\n", ret);
 318 +
 319 +       return 0;
 320 +
 321 +err_unset_pdata:
 322 +       platform_set_drvdata(n516_snd_device, NULL);
 323 +/*err_gpio_free_speaker:*/
 324 +       gpio_free(GPIO_SPEAKER_ENABLE);
 325 +err_device_put:
 326 +       platform_device_put(n516_snd_device);
 327 +
 328 +       return ret;
 329 +}
 330 +module_init(n516_init);
 331 +
 332 +static void __exit n516_exit(void)
 333 +{
 334 +       snd_soc_jack_free_gpios(&n516_hp_jack, 1, &n516_hp_gpio);
 335 +       gpio_free(GPIO_SPEAKER_ENABLE);
 336 +       platform_device_unregister(n516_snd_device);
 337 +}
 338 +module_exit(n516_exit);
 339 +
 340 +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 341 +MODULE_DESCRIPTION("ALSA SoC N516 Audio support");
 342 +MODULE_LICENSE("GPL v2");