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 #include <sound/soc-dapm.h>
  27
  28 #include <asm/mach-types.h>
  29 #include <asm/hardware/locomo.h>
  30 #include <mach/poodle.h>
  31 #include <mach/audio.h>
  32
  33 #include "../codecs/wm8731.h"
  34 #include "pxa2xx-pcm.h"
  35 #include "pxa2xx-i2s.h"
  36
  37 #define POODLE_HP        1
  38 #define POODLE_HP_OFF    0
  39 #define POODLE_SPK_ON    1
  40 #define POODLE_SPK_OFF   0
  41
  42  /* audio clock in Hz - rounded from 12.235MHz */
  43 #define POODLE_AUDIO_CLOCK 12288000
  44
  45 static int poodle_jack_func;
  46 static int poodle_spk_func;
  47
  48 static void poodle_ext_control(struct snd_soc_codec *codec)
  49 {
  50         /* set up jack connection */
  51         if (poodle_jack_func == POODLE_HP) {
  52                 /* set = unmute headphone */
  53                 locomo_gpio_write(&poodle_locomo_device.dev,
  54                         POODLE_LOCOMO_GPIO_MUTE_L, 1);
  55                 locomo_gpio_write(&poodle_locomo_device.dev,
  56                         POODLE_LOCOMO_GPIO_MUTE_R, 1);
  57                 snd_soc_dapm_enable_pin(codec, "Headphone Jack");
  58         } else {
  59                 locomo_gpio_write(&poodle_locomo_device.dev,
  60                         POODLE_LOCOMO_GPIO_MUTE_L, 0);
  61                 locomo_gpio_write(&poodle_locomo_device.dev,
  62                         POODLE_LOCOMO_GPIO_MUTE_R, 0);
  63                 snd_soc_dapm_disable_pin(codec, "Headphone Jack");
  64         }
  65
  66         /* set the enpoints to their new connetion states */
  67         if (poodle_spk_func == POODLE_SPK_ON)
  68                 snd_soc_dapm_enable_pin(codec, "Ext Spk");
  69         else
  70                 snd_soc_dapm_disable_pin(codec, "Ext Spk");
  71
  72         /* signal a DAPM event */
  73         snd_soc_dapm_sync(codec);
  74 }
  75
  76 static int poodle_startup(struct snd_pcm_substream *substream)
  77 {
  78         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  79         struct snd_soc_codec *codec = rtd->socdev->card->codec;
  80
  81         /* check the jack status at stream startup */
  82         poodle_ext_control(codec);
  83         return 0;
  84 }
  85
  86 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
  87 static void poodle_shutdown(struct snd_pcm_substream *substream)
  88 {
  89         /* set = unmute headphone */
  90         locomo_gpio_write(&poodle_locomo_device.dev,
  91                 POODLE_LOCOMO_GPIO_MUTE_L, 1);
  92         locomo_gpio_write(&poodle_locomo_device.dev,
  93                 POODLE_LOCOMO_GPIO_MUTE_R, 1);
  94 }
  95
  96 static int poodle_hw_params(struct snd_pcm_substream *substream,
  97         struct snd_pcm_hw_params *params)
  98 {
  99         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 100         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 101         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 102         unsigned int clk = 0;
 103         int ret = 0;
 104
 105         switch (params_rate(params)) {
 106         case 8000:
 107         case 16000:
 108         case 48000:
 109         case 96000:
 110                 clk = 12288000;
 111                 break;
 112         case 11025:
 113         case 22050:
 114         case 44100:
 115                 clk = 11289600;
 116                 break;
 117         }
 118
 119         /* set codec DAI configuration */
 120         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 121                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 122         if (ret < 0)
 123                 return ret;
 124
 125         /* set cpu DAI configuration */
 126         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 127                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 128         if (ret < 0)
 129                 return ret;
 130
 131         /* set the codec system clock for DAC and ADC */
 132         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK, clk,
 133                 SND_SOC_CLOCK_IN);
 134         if (ret < 0)
 135                 return ret;
 136
 137         /* set the I2S system clock as input (unused) */
 138         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 139                 SND_SOC_CLOCK_IN);
 140         if (ret < 0)
 141                 return ret;
 142
 143         return 0;
 144 }
 145
 146 static struct snd_soc_ops poodle_ops = {
 147         .startup = poodle_startup,
 148         .hw_params = poodle_hw_params,
 149         .shutdown = poodle_shutdown,
 150 };
 151
 152 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 153         struct snd_ctl_elem_value *ucontrol)
 154 {
 155         ucontrol->value.integer.value[0] = poodle_jack_func;
 156         return 0;
 157 }
 158
 159 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 160         struct snd_ctl_elem_value *ucontrol)
 161 {
 162         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 163
 164         if (poodle_jack_func == ucontrol->value.integer.value[0])
 165                 return 0;
 166
 167         poodle_jack_func = ucontrol->value.integer.value[0];
 168         poodle_ext_control(codec);
 169         return 1;
 170 }
 171
 172 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 173         struct snd_ctl_elem_value *ucontrol)
 174 {
 175         ucontrol->value.integer.value[0] = poodle_spk_func;
 176         return 0;
 177 }
 178
 179 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 180         struct snd_ctl_elem_value *ucontrol)
 181 {
 182         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 183
 184         if (poodle_spk_func == ucontrol->value.integer.value[0])
 185                 return 0;
 186
 187         poodle_spk_func = ucontrol->value.integer.value[0];
 188         poodle_ext_control(codec);
 189         return 1;
 190 }
 191
 192 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
 193         struct snd_kcontrol *k, int event)
 194 {
 195         if (SND_SOC_DAPM_EVENT_ON(event))
 196                 locomo_gpio_write(&poodle_locomo_device.dev,
 197                         POODLE_LOCOMO_GPIO_AMP_ON, 0);
 198         else
 199                 locomo_gpio_write(&poodle_locomo_device.dev,
 200                         POODLE_LOCOMO_GPIO_AMP_ON, 1);
 201
 202         return 0;
 203 }
 204
 205 /* poodle machine dapm widgets */
 206 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 207 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 208 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 209 };
 210
 211 /* Corgi machine connections to the codec pins */
 212 static const struct snd_soc_dapm_route audio_map[] = {
 213
 214         /* headphone connected to LHPOUT1, RHPOUT1 */
 215         {"Headphone Jack", NULL, "LHPOUT"},
 216         {"Headphone Jack", NULL, "RHPOUT"},
 217
 218         /* speaker connected to LOUT, ROUT */
 219         {"Ext Spk", NULL, "ROUT"},
 220         {"Ext Spk", NULL, "LOUT"},
 221 };
 222
 223 static const char *jack_function[] = {"Off", "Headphone"};
 224 static const char *spk_function[] = {"Off", "On"};
 225 static const struct soc_enum poodle_enum[] = {
 226         SOC_ENUM_SINGLE_EXT(2, jack_function),
 227         SOC_ENUM_SINGLE_EXT(2, spk_function),
 228 };
 229
 230 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
 231         SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 232                 poodle_set_jack),
 233         SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 234                 poodle_set_spk),
 235 };
 236
 237 /*
 238  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 239  */
 240 static int poodle_wm8731_init(struct snd_soc_codec *codec)
 241 {
 242         int err;
 243
 244         snd_soc_dapm_nc_pin(codec, "LLINEIN");
 245         snd_soc_dapm_nc_pin(codec, "RLINEIN");
 246         snd_soc_dapm_enable_pin(codec, "MICIN");
 247
 248         /* Add poodle specific controls */
 249         err = snd_soc_add_controls(codec, wm8731_poodle_controls,
 250                                 ARRAY_SIZE(wm8731_poodle_controls));
 251         if (err < 0)
 252                 return err;
 253
 254         /* Add poodle specific widgets */
 255         snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
 256                                   ARRAY_SIZE(wm8731_dapm_widgets));
 257
 258         /* Set up poodle specific audio path audio_map */
 259         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 260
 261         snd_soc_dapm_sync(codec);
 262         return 0;
 263 }
 264
 265 /* poodle digital audio interface glue - connects codec <--> CPU */
 266 static struct snd_soc_dai_link poodle_dai = {
 267         .name = "WM8731",
 268         .stream_name = "WM8731",
 269         .cpu_dai = &pxa_i2s_dai,
 270         .codec_dai = &wm8731_dai,
 271         .init = poodle_wm8731_init,
 272         .ops = &poodle_ops,
 273 };
 274
 275 /* poodle audio machine driver */
 276 static struct snd_soc_card snd_soc_poodle = {
 277         .name = "Poodle",
 278         .platform = &pxa2xx_soc_platform,
 279         .dai_link = &poodle_dai,
 280         .num_links = 1,
 281 };
 282
 283 /*
 284  * FIXME: This is a temporary bodge to avoid cross-tree merge issues.
 285  * New drivers should register the wm8731 I2C device in the machine
 286  * setup code (under arch/arm for ARM systems).
 287  */
 288 static int wm8731_i2c_register(void)
 289 {
 290         struct i2c_board_info info;
 291         struct i2c_adapter *adapter;
 292         struct i2c_client *client;
 293
 294         memset(&info, 0, sizeof(struct i2c_board_info));
 295         info.addr = 0x1b;
 296         strlcpy(info.type, "wm8731", I2C_NAME_SIZE);
 297
 298         adapter = i2c_get_adapter(0);
 299         if (!adapter) {
 300                 printk(KERN_ERR "can't get i2c adapter 0\n");
 301                 return -ENODEV;
 302         }
 303
 304         client = i2c_new_device(adapter, &info);
 305         i2c_put_adapter(adapter);
 306         if (!client) {
 307                 printk(KERN_ERR "can't add i2c device at 0x%x\n",
 308                         (unsigned int)info.addr);
 309                 return -ENODEV;
 310         }
 311
 312         return 0;
 313 }
 314
 315 /* poodle audio subsystem */
 316 static struct snd_soc_device poodle_snd_devdata = {
 317         .card = &snd_soc_poodle,
 318         .codec_dev = &soc_codec_dev_wm8731,
 319 };
 320
 321 static struct platform_device *poodle_snd_device;
 322
 323 static int __init poodle_init(void)
 324 {
 325         int ret;
 326
 327         if (!machine_is_poodle())
 328                 return -ENODEV;
 329
 330         ret = wm8731_i2c_register();
 331         if (ret != 0)
 332                 return ret;
 333
 334         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 335                 POODLE_LOCOMO_GPIO_AMP_ON, 0);
 336         /* should we mute HP at startup - burning power ?*/
 337         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 338                 POODLE_LOCOMO_GPIO_MUTE_L, 0);
 339         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 340                 POODLE_LOCOMO_GPIO_MUTE_R, 0);
 341
 342         poodle_snd_device = platform_device_alloc("soc-audio", -1);
 343         if (!poodle_snd_device)
 344                 return -ENOMEM;
 345
 346         platform_set_drvdata(poodle_snd_device, &poodle_snd_devdata);
 347         poodle_snd_devdata.dev = &poodle_snd_device->dev;
 348         ret = platform_device_add(poodle_snd_device);
 349
 350         if (ret)
 351                 platform_device_put(poodle_snd_device);
 352
 353         return ret;
 354 }
 355
 356 static void __exit poodle_exit(void)
 357 {
 358         platform_device_unregister(poodle_snd_device);
 359 }
 360
 361 module_init(poodle_init);
 362 module_exit(poodle_exit);
 363
 364 /* Module information */
 365 MODULE_AUTHOR("Richard Purdie");
 366 MODULE_DESCRIPTION("ALSA SoC Poodle");
 367 MODULE_LICENSE("GPL");