sound/soc/codecs/ad1836.c

   1 /*
   2  * File:         sound/soc/codecs/ad1836.c
   3  * Author:       Barry Song <Barry.Song@analog.com>
   4  *
   5  * Created:      Aug 04 2009
   6  * Description:  Driver for AD1836 sound chip
   7  *
   8  * Modified:
   9  *               Copyright 2009 Analog Devices Inc.
  10  *
  11  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/slab.h>
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/device.h>
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/initval.h>
  28 #include <sound/soc.h>
  29 #include <sound/tlv.h>
  30 #include <linux/spi/spi.h>
  31 #include "ad1836.h"
  32
  33 enum ad1836_type {
  34         AD1835,
  35         AD1836,
  36         AD1838,
  37 };
  38
  39 /* codec private data */
  40 struct ad1836_priv {
  41         enum snd_soc_control_type control_type;
  42         void *control_data;
  43         enum ad1836_type type;
  44 };
  45
  46 /*
  47  * AD1836 volume/mute/de-emphasis etc. controls
  48  */
  49 static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
  50
  51 static const struct soc_enum ad1836_deemp_enum =
  52         SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
  53
  54 #define AD1836_DAC_VOLUME(x) \
  55         SOC_DOUBLE_R("DAC" #x " Playback Volume", AD1836_DAC_L_VOL(x), \
  56                         AD1836_DAC_R_VOL(x), 0, 0x3FF, 0)
  57
  58 #define AD1836_DAC_SWITCH(x) \
  59         SOC_DOUBLE("DAC" #x " Playback Switch", AD1836_DAC_CTRL2, \
  60                         AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
  61
  62 #define AD1836_ADC_SWITCH(x) \
  63         SOC_DOUBLE("ADC" #x " Capture Switch", AD1836_ADC_CTRL2, \
  64                 AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
  65
  66 static const struct snd_kcontrol_new ad183x_dac_controls[] = {
  67         AD1836_DAC_VOLUME(1),
  68         AD1836_DAC_SWITCH(1),
  69         AD1836_DAC_VOLUME(2),
  70         AD1836_DAC_SWITCH(2),
  71         AD1836_DAC_VOLUME(3),
  72         AD1836_DAC_SWITCH(3),
  73         AD1836_DAC_VOLUME(4),
  74         AD1836_DAC_SWITCH(4),
  75 };
  76
  77 static const struct snd_soc_dapm_widget ad183x_dac_dapm_widgets[] = {
  78         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  79         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  80         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  81         SND_SOC_DAPM_OUTPUT("DAC4OUT"),
  82 };
  83
  84 static const struct snd_soc_dapm_route ad183x_dac_routes[] = {
  85         { "DAC1OUT", NULL, "DAC" },
  86         { "DAC2OUT", NULL, "DAC" },
  87         { "DAC3OUT", NULL, "DAC" },
  88         { "DAC4OUT", NULL, "DAC" },
  89 };
  90
  91 static const struct snd_kcontrol_new ad183x_adc_controls[] = {
  92         AD1836_ADC_SWITCH(1),
  93         AD1836_ADC_SWITCH(2),
  94         AD1836_ADC_SWITCH(3),
  95 };
  96
  97 static const struct snd_soc_dapm_widget ad183x_adc_dapm_widgets[] = {
  98         SND_SOC_DAPM_INPUT("ADC1IN"),
  99         SND_SOC_DAPM_INPUT("ADC2IN"),
 100 };
 101
 102 static const struct snd_soc_dapm_route ad183x_adc_routes[] = {
 103         { "ADC", NULL, "ADC1IN" },
 104         { "ADC", NULL, "ADC2IN" },
 105 };
 106
 107 static const struct snd_kcontrol_new ad183x_controls[] = {
 108         /* ADC high-pass filter */
 109         SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
 110                         AD1836_ADC_HIGHPASS_FILTER, 1, 0),
 111
 112         /* DAC de-emphasis */
 113         SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
 114 };
 115
 116 static const struct snd_soc_dapm_widget ad183x_dapm_widgets[] = {
 117         SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
 118                                 AD1836_DAC_POWERDOWN, 1),
 119         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
 120         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
 121                                 AD1836_ADC_POWERDOWN, 1, NULL, 0),
 122 };
 123
 124 static const struct snd_soc_dapm_route ad183x_dapm_routes[] = {
 125         { "DAC", NULL, "ADC_PWR" },
 126         { "ADC", NULL, "ADC_PWR" },
 127 };
 128
 129 /*
 130  * DAI ops entries
 131  */
 132
 133 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
 134                 unsigned int fmt)
 135 {
 136         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 137         /* at present, we support adc aux mode to interface with
 138          * blackfin sport tdm mode
 139          */
 140         case SND_SOC_DAIFMT_DSP_A:
 141                 break;
 142         default:
 143                 return -EINVAL;
 144         }
 145
 146         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 147         case SND_SOC_DAIFMT_IB_IF:
 148                 break;
 149         default:
 150                 return -EINVAL;
 151         }
 152
 153         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 154         /* ALCLK,ABCLK are both output, AD1836 can only be master */
 155         case SND_SOC_DAIFMT_CBM_CFM:
 156                 break;
 157         default:
 158                 return -EINVAL;
 159         }
 160
 161         return 0;
 162 }
 163
 164 static int ad1836_hw_params(struct snd_pcm_substream *substream,
 165                 struct snd_pcm_hw_params *params,
 166                 struct snd_soc_dai *dai)
 167 {
 168         int word_len = 0;
 169
 170         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 171         struct snd_soc_codec *codec = rtd->codec;
 172
 173         /* bit size */
 174         switch (params_format(params)) {
 175         case SNDRV_PCM_FORMAT_S16_LE:
 176                 word_len = 3;
 177                 break;
 178         case SNDRV_PCM_FORMAT_S20_3LE:
 179                 word_len = 1;
 180                 break;
 181         case SNDRV_PCM_FORMAT_S24_LE:
 182         case SNDRV_PCM_FORMAT_S32_LE:
 183                 word_len = 0;
 184                 break;
 185         }
 186
 187         snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
 188                 AD1836_DAC_WORD_LEN_MASK, word_len);
 189
 190         snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 191                 AD1836_ADC_WORD_LEN_MASK, word_len);
 192
 193         return 0;
 194 }
 195
 196 #ifdef CONFIG_PM
 197 static int ad1836_soc_suspend(struct snd_soc_codec *codec,
 198                 pm_message_t state)
 199 {
 200         /* reset clock control mode */
 201         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 202                 AD1836_ADC_SERFMT_MASK, 0);
 203 }
 204
 205 static int ad1836_soc_resume(struct snd_soc_codec *codec)
 206 {
 207         /* restore clock control mode */
 208         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 209                 AD1836_ADC_SERFMT_MASK, AD1836_ADC_AUX);
 210 }
 211 #else
 212 #define ad1836_soc_suspend NULL
 213 #define ad1836_soc_resume  NULL
 214 #endif
 215
 216 static struct snd_soc_dai_ops ad1836_dai_ops = {
 217         .hw_params = ad1836_hw_params,
 218         .set_fmt = ad1836_set_dai_fmt,
 219 };
 220
 221 #define AD183X_DAI(_name, num_dacs, num_adcs) \
 222 { \
 223         .name = _name "-hifi", \
 224         .playback = { \
 225                 .stream_name = "Playback", \
 226                 .channels_min = 2, \
 227                 .channels_max = (num_dacs) * 2, \
 228                 .rates = SNDRV_PCM_RATE_48000,  \
 229                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 230                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 231         }, \
 232         .capture = { \
 233                 .stream_name = "Capture", \
 234                 .channels_min = 2, \
 235                 .channels_max = (num_adcs) * 2, \
 236                 .rates = SNDRV_PCM_RATE_48000, \
 237                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 238                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 239         }, \
 240         .ops = &ad1836_dai_ops, \
 241 }
 242
 243 static struct snd_soc_dai_driver ad183x_dais[] = {
 244         [AD1835] = AD183X_DAI("ad1835", 4, 1),
 245         [AD1836] = AD183X_DAI("ad1836", 3, 2),
 246         [AD1838] = AD183X_DAI("ad1838", 3, 1),
 247 };
 248
 249 static int ad1836_probe(struct snd_soc_codec *codec)
 250 {
 251         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
 252         struct snd_soc_dapm_context *dapm = &codec->dapm;
 253         int num_dacs, num_adcs;
 254         int ret = 0;
 255         int i;
 256
 257         num_dacs = ad183x_dais[ad1836->type].playback.channels_max / 2;
 258         num_adcs = ad183x_dais[ad1836->type].capture.channels_max / 2;
 259
 260         codec->control_data = ad1836->control_data;
 261         ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
 262         if (ret < 0) {
 263                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 264                                 ret);
 265                 return ret;
 266         }
 267
 268         /* default setting for ad1836 */
 269         /* de-emphasis: 48kHz, power-on dac */
 270         snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
 271         /* unmute dac channels */
 272         snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
 273         /* high-pass filter enable, power-on adc */
 274         snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
 275         /* unmute adc channles, adc aux mode */
 276         snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
 277         /* volume */
 278         for (i = 1; i <= num_dacs; ++i) {
 279                 snd_soc_write(codec, AD1836_DAC_L_VOL(i), 0x3FF);
 280                 snd_soc_write(codec, AD1836_DAC_R_VOL(i), 0x3FF);
 281         }
 282
 283         if (ad1836->type == AD1836) {
 284                 /* left/right diff:PGA/MUX */
 285                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
 286         } else {
 287                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x00);
 288         }
 289
 290         ret = snd_soc_add_controls(codec, ad183x_dac_controls, num_dacs * 2);
 291         if (ret)
 292                 return ret;
 293
 294         ret = snd_soc_add_controls(codec, ad183x_adc_controls, num_adcs);
 295         if (ret)
 296                 return ret;
 297
 298         ret = snd_soc_dapm_new_controls(dapm, ad183x_dac_dapm_widgets, num_dacs);
 299         if (ret)
 300                 return ret;
 301
 302         ret = snd_soc_dapm_new_controls(dapm, ad183x_adc_dapm_widgets, num_adcs);
 303         if (ret)
 304                 return ret;
 305
 306         ret = snd_soc_dapm_add_routes(dapm, ad183x_dac_routes, num_dacs);
 307         if (ret)
 308                 return ret;
 309
 310         ret = snd_soc_dapm_add_routes(dapm, ad183x_adc_routes, num_adcs);
 311         if (ret)
 312                 return ret;
 313
 314         return ret;
 315 }
 316
 317 /* power down chip */
 318 static int ad1836_remove(struct snd_soc_codec *codec)
 319 {
 320         /* reset clock control mode */
 321         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 322                 AD1836_ADC_SERFMT_MASK, 0);
 323 }
 324
 325 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 326         .probe =        ad1836_probe,
 327         .remove =       ad1836_remove,
 328         .suspend =      ad1836_soc_suspend,
 329         .resume =       ad1836_soc_resume,
 330         .reg_cache_size = AD1836_NUM_REGS,
 331         .reg_word_size = sizeof(u16),
 332
 333         .controls = ad183x_controls,
 334         .num_controls = ARRAY_SIZE(ad183x_controls),
 335         .dapm_widgets = ad183x_dapm_widgets,
 336         .num_dapm_widgets = ARRAY_SIZE(ad183x_dapm_widgets),
 337         .dapm_routes = ad183x_dapm_routes,
 338         .num_dapm_routes = ARRAY_SIZE(ad183x_dapm_routes),
 339 };
 340
 341 static int __devinit ad1836_spi_probe(struct spi_device *spi)
 342 {
 343         struct ad1836_priv *ad1836;
 344         int ret;
 345
 346         ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
 347         if (ad1836 == NULL)
 348                 return -ENOMEM;
 349
 350         ad1836->type = spi_get_device_id(spi)->driver_data;
 351
 352         spi_set_drvdata(spi, ad1836);
 353         ad1836->control_data = spi;
 354         ad1836->control_type = SND_SOC_SPI;
 355
 356         ret = snd_soc_register_codec(&spi->dev,
 357                         &soc_codec_dev_ad1836, &ad183x_dais[ad1836->type], 1);
 358         if (ret < 0)
 359                 kfree(ad1836);
 360         return ret;
 361 }
 362
 363 static int __devexit ad1836_spi_remove(struct spi_device *spi)
 364 {
 365         snd_soc_unregister_codec(&spi->dev);
 366         kfree(spi_get_drvdata(spi));
 367         return 0;
 368 }
 369 static const struct spi_device_id ad1836_ids[] = {
 370         { "ad1835", AD1835 },
 371         { "ad1836", AD1836 },
 372         { "ad1837", AD1835 },
 373         { "ad1838", AD1838 },
 374         { "ad1839", AD1838 },
 375         { },
 376 };
 377 MODULE_DEVICE_TABLE(spi, ad1836_ids);
 378
 379 static struct spi_driver ad1836_spi_driver = {
 380         .driver = {
 381                 .name   = "ad1836-codec",
 382                 .owner  = THIS_MODULE,
 383         },
 384         .probe          = ad1836_spi_probe,
 385         .remove         = __devexit_p(ad1836_spi_remove),
 386         .id_table       = ad1836_ids,
 387 };
 388
 389 static int __init ad1836_init(void)
 390 {
 391         int ret;
 392
 393         ret = spi_register_driver(&ad1836_spi_driver);
 394         if (ret != 0) {
 395                 printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
 396                                 ret);
 397         }
 398
 399         return ret;
 400 }
 401 module_init(ad1836_init);
 402
 403 static void __exit ad1836_exit(void)
 404 {
 405         spi_unregister_driver(&ad1836_spi_driver);
 406 }
 407 module_exit(ad1836_exit);
 408
 409 MODULE_DESCRIPTION("ASoC ad1836 driver");
 410 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 411 MODULE_LICENSE("GPL");