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 #include <sound/soc-dapm.h>
  27
  28 #include <asm/mach-types.h>
  29 #include <mach/pxa-regs.h>
  30 #include <mach/hardware.h>
  31 #include <mach/corgi.h>
  32 #include <mach/audio.h>
  33
  34 #include "../codecs/wm8731.h"
  35 #include "pxa2xx-pcm.h"
  36 #include "pxa2xx-i2s.h"
  37
  38 #define CORGI_HP        0
  39 #define CORGI_MIC       1
  40 #define CORGI_LINE      2
  41 #define CORGI_HEADSET   3
  42 #define CORGI_HP_OFF    4
  43 #define CORGI_SPK_ON    0
  44 #define CORGI_SPK_OFF   1
  45
  46  /* audio clock in Hz - rounded from 12.235MHz */
  47 #define CORGI_AUDIO_CLOCK 12288000
  48
  49 static int corgi_jack_func;
  50 static int corgi_spk_func;
  51
  52 static void corgi_ext_control(struct snd_soc_codec *codec)
  53 {
  54         /* set up jack connection */
  55         switch (corgi_jack_func) {
  56         case CORGI_HP:
  57                 /* set = unmute headphone */
  58                 gpio_set_value(CORGI_GPIO_MUTE_L, 1);
  59                 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
  60                 snd_soc_dapm_disable_pin(codec, "Mic Jack");
  61                 snd_soc_dapm_disable_pin(codec, "Line Jack");
  62                 snd_soc_dapm_enable_pin(codec, "Headphone Jack");
  63                 snd_soc_dapm_disable_pin(codec, "Headset Jack");
  64                 break;
  65         case CORGI_MIC:
  66                 /* reset = mute headphone */
  67                 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
  68                 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
  69                 snd_soc_dapm_enable_pin(codec, "Mic Jack");
  70                 snd_soc_dapm_disable_pin(codec, "Line Jack");
  71                 snd_soc_dapm_disable_pin(codec, "Headphone Jack");
  72                 snd_soc_dapm_disable_pin(codec, "Headset Jack");
  73                 break;
  74         case CORGI_LINE:
  75                 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
  76                 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
  77                 snd_soc_dapm_disable_pin(codec, "Mic Jack");
  78                 snd_soc_dapm_enable_pin(codec, "Line Jack");
  79                 snd_soc_dapm_disable_pin(codec, "Headphone Jack");
  80                 snd_soc_dapm_disable_pin(codec, "Headset Jack");
  81                 break;
  82         case CORGI_HEADSET:
  83                 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
  84                 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
  85                 snd_soc_dapm_enable_pin(codec, "Mic Jack");
  86                 snd_soc_dapm_disable_pin(codec, "Line Jack");
  87                 snd_soc_dapm_disable_pin(codec, "Headphone Jack");
  88                 snd_soc_dapm_enable_pin(codec, "Headset Jack");
  89                 break;
  90         }
  91
  92         if (corgi_spk_func == CORGI_SPK_ON)
  93                 snd_soc_dapm_enable_pin(codec, "Ext Spk");
  94         else
  95                 snd_soc_dapm_disable_pin(codec, "Ext Spk");
  96
  97         /* signal a DAPM event */
  98         snd_soc_dapm_sync(codec);
  99 }
 100
 101 static int corgi_startup(struct snd_pcm_substream *substream)
 102 {
 103         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 104         struct snd_soc_codec *codec = rtd->socdev->card->codec;
 105
 106         /* check the jack status at stream startup */
 107         corgi_ext_control(codec);
 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->dai->codec_dai;
 124         struct snd_soc_dai *cpu_dai = rtd->dai->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 codec DAI configuration */
 143         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 144                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 145         if (ret < 0)
 146                 return ret;
 147
 148         /* set cpu DAI configuration */
 149         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 150                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 151         if (ret < 0)
 152                 return ret;
 153
 154         /* set the codec system clock for DAC and ADC */
 155         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK, clk,
 156                 SND_SOC_CLOCK_IN);
 157         if (ret < 0)
 158                 return ret;
 159
 160         /* set the I2S system clock as input (unused) */
 161         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 162                 SND_SOC_CLOCK_IN);
 163         if (ret < 0)
 164                 return ret;
 165
 166         return 0;
 167 }
 168
 169 static struct snd_soc_ops corgi_ops = {
 170         .startup = corgi_startup,
 171         .hw_params = corgi_hw_params,
 172         .shutdown = corgi_shutdown,
 173 };
 174
 175 static int corgi_get_jack(struct snd_kcontrol *kcontrol,
 176         struct snd_ctl_elem_value *ucontrol)
 177 {
 178         ucontrol->value.integer.value[0] = corgi_jack_func;
 179         return 0;
 180 }
 181
 182 static int corgi_set_jack(struct snd_kcontrol *kcontrol,
 183         struct snd_ctl_elem_value *ucontrol)
 184 {
 185         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 186
 187         if (corgi_jack_func == ucontrol->value.integer.value[0])
 188                 return 0;
 189
 190         corgi_jack_func = ucontrol->value.integer.value[0];
 191         corgi_ext_control(codec);
 192         return 1;
 193 }
 194
 195 static int corgi_get_spk(struct snd_kcontrol *kcontrol,
 196         struct snd_ctl_elem_value *ucontrol)
 197 {
 198         ucontrol->value.integer.value[0] = corgi_spk_func;
 199         return 0;
 200 }
 201
 202 static int corgi_set_spk(struct snd_kcontrol *kcontrol,
 203         struct snd_ctl_elem_value *ucontrol)
 204 {
 205         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 206
 207         if (corgi_spk_func == ucontrol->value.integer.value[0])
 208                 return 0;
 209
 210         corgi_spk_func = ucontrol->value.integer.value[0];
 211         corgi_ext_control(codec);
 212         return 1;
 213 }
 214
 215 static int corgi_amp_event(struct snd_soc_dapm_widget *w,
 216         struct snd_kcontrol *k, int event)
 217 {
 218         gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
 219         return 0;
 220 }
 221
 222 static int corgi_mic_event(struct snd_soc_dapm_widget *w,
 223         struct snd_kcontrol *k, int event)
 224 {
 225         gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
 226         return 0;
 227 }
 228
 229 /* corgi machine dapm widgets */
 230 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 231 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 232 SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
 233 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
 234 SND_SOC_DAPM_LINE("Line Jack", NULL),
 235 SND_SOC_DAPM_HP("Headset Jack", NULL),
 236 };
 237
 238 /* Corgi machine audio map (connections to the codec pins) */
 239 static const struct snd_soc_dapm_route audio_map[] = {
 240
 241         /* headset Jack  - in = micin, out = LHPOUT*/
 242         {"Headset Jack", NULL, "LHPOUT"},
 243
 244         /* headphone connected to LHPOUT1, RHPOUT1 */
 245         {"Headphone Jack", NULL, "LHPOUT"},
 246         {"Headphone Jack", NULL, "RHPOUT"},
 247
 248         /* speaker connected to LOUT, ROUT */
 249         {"Ext Spk", NULL, "ROUT"},
 250         {"Ext Spk", NULL, "LOUT"},
 251
 252         /* mic is connected to MICIN (via right channel of headphone jack) */
 253         {"MICIN", NULL, "Mic Jack"},
 254
 255         /* Same as the above but no mic bias for line signals */
 256         {"MICIN", NULL, "Line Jack"},
 257 };
 258
 259 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
 260         "Off"};
 261 static const char *spk_function[] = {"On", "Off"};
 262 static const struct soc_enum corgi_enum[] = {
 263         SOC_ENUM_SINGLE_EXT(5, jack_function),
 264         SOC_ENUM_SINGLE_EXT(2, spk_function),
 265 };
 266
 267 static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
 268         SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
 269                 corgi_set_jack),
 270         SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
 271                 corgi_set_spk),
 272 };
 273
 274 /*
 275  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 276  */
 277 static int corgi_wm8731_init(struct snd_soc_codec *codec)
 278 {
 279         int err;
 280
 281         snd_soc_dapm_nc_pin(codec, "LLINEIN");
 282         snd_soc_dapm_nc_pin(codec, "RLINEIN");
 283
 284         /* Add corgi specific controls */
 285         err = snd_soc_add_controls(codec, wm8731_corgi_controls,
 286                                 ARRAY_SIZE(wm8731_corgi_controls));
 287         if (err < 0)
 288                 return err;
 289
 290         /* Add corgi specific widgets */
 291         snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
 292                                   ARRAY_SIZE(wm8731_dapm_widgets));
 293
 294         /* Set up corgi specific audio path audio_map */
 295         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 296
 297         snd_soc_dapm_sync(codec);
 298         return 0;
 299 }
 300
 301 /* corgi digital audio interface glue - connects codec <--> CPU */
 302 static struct snd_soc_dai_link corgi_dai = {
 303         .name = "WM8731",
 304         .stream_name = "WM8731",
 305         .cpu_dai = &pxa_i2s_dai,
 306         .codec_dai = &wm8731_dai,
 307         .init = corgi_wm8731_init,
 308         .ops = &corgi_ops,
 309 };
 310
 311 /* corgi audio machine driver */
 312 static struct snd_soc_card snd_soc_corgi = {
 313         .name = "Corgi",
 314         .platform = &pxa2xx_soc_platform,
 315         .dai_link = &corgi_dai,
 316         .num_links = 1,
 317 };
 318
 319 /* corgi audio subsystem */
 320 static struct snd_soc_device corgi_snd_devdata = {
 321         .card = &snd_soc_corgi,
 322         .codec_dev = &soc_codec_dev_wm8731,
 323 };
 324
 325 /*
 326  * FIXME: This is a temporary bodge to avoid cross-tree merge issues.
 327  * New drivers should register the wm8731 I2C device in the machine
 328  * setup code (under arch/arm for ARM systems).
 329  */
 330 static int wm8731_i2c_register(void)
 331 {
 332         struct i2c_board_info info;
 333         struct i2c_adapter *adapter;
 334         struct i2c_client *client;
 335
 336         memset(&info, 0, sizeof(struct i2c_board_info));
 337         info.addr = 0x1b;
 338         strlcpy(info.type, "wm8731", I2C_NAME_SIZE);
 339
 340         adapter = i2c_get_adapter(0);
 341         if (!adapter) {
 342                 printk(KERN_ERR "can't get i2c adapter 0\n");
 343                 return -ENODEV;
 344         }
 345
 346         client = i2c_new_device(adapter, &info);
 347         i2c_put_adapter(adapter);
 348         if (!client) {
 349                 printk(KERN_ERR "can't add i2c device at 0x%x\n",
 350                         (unsigned int)info.addr);
 351                 return -ENODEV;
 352         }
 353
 354         return 0;
 355 }
 356
 357 static struct platform_device *corgi_snd_device;
 358
 359 static int __init corgi_init(void)
 360 {
 361         int ret;
 362
 363         if (!(machine_is_corgi() || machine_is_shepherd() ||
 364               machine_is_husky()))
 365                 return -ENODEV;
 366
 367         ret = wm8731_i2c_register();
 368         if (ret != 0)
 369                 return ret;
 370
 371         corgi_snd_device = platform_device_alloc("soc-audio", -1);
 372         if (!corgi_snd_device)
 373                 return -ENOMEM;
 374
 375         platform_set_drvdata(corgi_snd_device, &corgi_snd_devdata);
 376         corgi_snd_devdata.dev = &corgi_snd_device->dev;
 377         ret = platform_device_add(corgi_snd_device);
 378
 379         if (ret)
 380                 platform_device_put(corgi_snd_device);
 381
 382         return ret;
 383 }
 384
 385 static void __exit corgi_exit(void)
 386 {
 387         platform_device_unregister(corgi_snd_device);
 388 }
 389
 390 module_init(corgi_init);
 391 module_exit(corgi_exit);
 392
 393 /* Module information */
 394 MODULE_AUTHOR("Richard Purdie");
 395 MODULE_DESCRIPTION("ALSA SoC Corgi");
 396 MODULE_LICENSE("GPL");