sound/soc/codecs/ad1836.c

   1  /*
   2  * Audio Codec driver supporting:
   3  *  AD1835A, AD1836, AD1837A, AD1838A, AD1839A
   4  *
   5  * Copyright 2009-2011 Analog Devices Inc.
   6  *
   7  * Licensed under the GPL-2 or later.
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/slab.h>
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/device.h>
  15 #include <sound/core.h>
  16 #include <sound/pcm.h>
  17 #include <sound/pcm_params.h>
  18 #include <sound/initval.h>
  19 #include <sound/soc.h>
  20 #include <sound/tlv.h>
  21 #include <linux/spi/spi.h>
  22 #include "ad1836.h"
  23
  24 enum ad1836_type {
  25         AD1835,
  26         AD1836,
  27         AD1838,
  28 };
  29
  30 /* codec private data */
  31 struct ad1836_priv {
  32         enum ad1836_type type;
  33 };
  34
  35 /*
  36  * AD1836 volume/mute/de-emphasis etc. controls
  37  */
  38 static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
  39
  40 static const struct soc_enum ad1836_deemp_enum =
  41         SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
  42
  43 #define AD1836_DAC_VOLUME(x) \
  44         SOC_DOUBLE_R("DAC" #x " Playback Volume", AD1836_DAC_L_VOL(x), \
  45                         AD1836_DAC_R_VOL(x), 0, 0x3FF, 0)
  46
  47 #define AD1836_DAC_SWITCH(x) \
  48         SOC_DOUBLE("DAC" #x " Playback Switch", AD1836_DAC_CTRL2, \
  49                         AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
  50
  51 #define AD1836_ADC_SWITCH(x) \
  52         SOC_DOUBLE("ADC" #x " Capture Switch", AD1836_ADC_CTRL2, \
  53                 AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
  54
  55 static const struct snd_kcontrol_new ad183x_dac_controls[] = {
  56         AD1836_DAC_VOLUME(1),
  57         AD1836_DAC_SWITCH(1),
  58         AD1836_DAC_VOLUME(2),
  59         AD1836_DAC_SWITCH(2),
  60         AD1836_DAC_VOLUME(3),
  61         AD1836_DAC_SWITCH(3),
  62         AD1836_DAC_VOLUME(4),
  63         AD1836_DAC_SWITCH(4),
  64 };
  65
  66 static const struct snd_soc_dapm_widget ad183x_dac_dapm_widgets[] = {
  67         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  68         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  69         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  70         SND_SOC_DAPM_OUTPUT("DAC4OUT"),
  71 };
  72
  73 static const struct snd_soc_dapm_route ad183x_dac_routes[] = {
  74         { "DAC1OUT", NULL, "DAC" },
  75         { "DAC2OUT", NULL, "DAC" },
  76         { "DAC3OUT", NULL, "DAC" },
  77         { "DAC4OUT", NULL, "DAC" },
  78 };
  79
  80 static const struct snd_kcontrol_new ad183x_adc_controls[] = {
  81         AD1836_ADC_SWITCH(1),
  82         AD1836_ADC_SWITCH(2),
  83         AD1836_ADC_SWITCH(3),
  84 };
  85
  86 static const struct snd_soc_dapm_widget ad183x_adc_dapm_widgets[] = {
  87         SND_SOC_DAPM_INPUT("ADC1IN"),
  88         SND_SOC_DAPM_INPUT("ADC2IN"),
  89 };
  90
  91 static const struct snd_soc_dapm_route ad183x_adc_routes[] = {
  92         { "ADC", NULL, "ADC1IN" },
  93         { "ADC", NULL, "ADC2IN" },
  94 };
  95
  96 static const struct snd_kcontrol_new ad183x_controls[] = {
  97         /* ADC high-pass filter */
  98         SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
  99                         AD1836_ADC_HIGHPASS_FILTER, 1, 0),
 100
 101         /* DAC de-emphasis */
 102         SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
 103 };
 104
 105 static const struct snd_soc_dapm_widget ad183x_dapm_widgets[] = {
 106         SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
 107                                 AD1836_DAC_POWERDOWN, 1),
 108         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
 109         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
 110                                 AD1836_ADC_POWERDOWN, 1, NULL, 0),
 111 };
 112
 113 static const struct snd_soc_dapm_route ad183x_dapm_routes[] = {
 114         { "DAC", NULL, "ADC_PWR" },
 115         { "ADC", NULL, "ADC_PWR" },
 116 };
 117
 118 static const DECLARE_TLV_DB_SCALE(ad1836_in_tlv, 0, 300, 0);
 119
 120 static const struct snd_kcontrol_new ad1836_controls[] = {
 121         SOC_DOUBLE_TLV("ADC2 Capture Volume", AD1836_ADC_CTRL1, 3, 0, 4, 0,
 122             ad1836_in_tlv),
 123 };
 124
 125 /*
 126  * DAI ops entries
 127  */
 128
 129 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
 130                 unsigned int fmt)
 131 {
 132         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 133         /* at present, we support adc aux mode to interface with
 134          * blackfin sport tdm mode
 135          */
 136         case SND_SOC_DAIFMT_DSP_A:
 137                 break;
 138         default:
 139                 return -EINVAL;
 140         }
 141
 142         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 143         case SND_SOC_DAIFMT_IB_IF:
 144                 break;
 145         default:
 146                 return -EINVAL;
 147         }
 148
 149         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 150         /* ALCLK,ABCLK are both output, AD1836 can only be master */
 151         case SND_SOC_DAIFMT_CBM_CFM:
 152                 break;
 153         default:
 154                 return -EINVAL;
 155         }
 156
 157         return 0;
 158 }
 159
 160 static int ad1836_hw_params(struct snd_pcm_substream *substream,
 161                 struct snd_pcm_hw_params *params,
 162                 struct snd_soc_dai *dai)
 163 {
 164         int word_len = 0;
 165
 166         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 167         struct snd_soc_codec *codec = rtd->codec;
 168
 169         /* bit size */
 170         switch (params_format(params)) {
 171         case SNDRV_PCM_FORMAT_S16_LE:
 172                 word_len = AD1836_WORD_LEN_16;
 173                 break;
 174         case SNDRV_PCM_FORMAT_S20_3LE:
 175                 word_len = AD1836_WORD_LEN_20;
 176                 break;
 177         case SNDRV_PCM_FORMAT_S24_LE:
 178         case SNDRV_PCM_FORMAT_S32_LE:
 179                 word_len = AD1836_WORD_LEN_24;
 180                 break;
 181         }
 182
 183         snd_soc_update_bits(codec, AD1836_DAC_CTRL1, AD1836_DAC_WORD_LEN_MASK,
 184                 word_len << AD1836_DAC_WORD_LEN_OFFSET);
 185
 186         snd_soc_update_bits(codec, AD1836_ADC_CTRL2, AD1836_ADC_WORD_LEN_MASK,
 187                 word_len << AD1836_ADC_WORD_OFFSET);
 188
 189         return 0;
 190 }
 191
 192 static struct snd_soc_dai_ops ad1836_dai_ops = {
 193         .hw_params = ad1836_hw_params,
 194         .set_fmt = ad1836_set_dai_fmt,
 195 };
 196
 197 #define AD183X_DAI(_name, num_dacs, num_adcs) \
 198 { \
 199         .name = _name "-hifi", \
 200         .playback = { \
 201                 .stream_name = "Playback", \
 202                 .channels_min = 2, \
 203                 .channels_max = (num_dacs) * 2, \
 204                 .rates = SNDRV_PCM_RATE_48000,  \
 205                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 206                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 207         }, \
 208         .capture = { \
 209                 .stream_name = "Capture", \
 210                 .channels_min = 2, \
 211                 .channels_max = (num_adcs) * 2, \
 212                 .rates = SNDRV_PCM_RATE_48000, \
 213                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 214                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 215         }, \
 216         .ops = &ad1836_dai_ops, \
 217 }
 218
 219 static struct snd_soc_dai_driver ad183x_dais[] = {
 220         [AD1835] = AD183X_DAI("ad1835", 4, 1),
 221         [AD1836] = AD183X_DAI("ad1836", 3, 2),
 222         [AD1838] = AD183X_DAI("ad1838", 3, 1),
 223 };
 224
 225 #ifdef CONFIG_PM
 226 static int ad1836_suspend(struct snd_soc_codec *codec, pm_message_t state)
 227 {
 228         /* reset clock control mode */
 229         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 230                 AD1836_ADC_SERFMT_MASK, 0);
 231 }
 232
 233 static int ad1836_resume(struct snd_soc_codec *codec)
 234 {
 235         /* restore clock control mode */
 236         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 237                 AD1836_ADC_SERFMT_MASK, AD1836_ADC_AUX);
 238 }
 239 #else
 240 #define ad1836_suspend NULL
 241 #define ad1836_resume  NULL
 242 #endif
 243
 244 static int ad1836_probe(struct snd_soc_codec *codec)
 245 {
 246         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
 247         struct snd_soc_dapm_context *dapm = &codec->dapm;
 248         int num_dacs, num_adcs;
 249         int ret = 0;
 250         int i;
 251
 252         num_dacs = ad183x_dais[ad1836->type].playback.channels_max / 2;
 253         num_adcs = ad183x_dais[ad1836->type].capture.channels_max / 2;
 254
 255         ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
 256         if (ret < 0) {
 257                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 258                                 ret);
 259                 return ret;
 260         }
 261
 262         /* default setting for ad1836 */
 263         /* de-emphasis: 48kHz, power-on dac */
 264         snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
 265         /* unmute dac channels */
 266         snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
 267         /* high-pass filter enable, power-on adc */
 268         snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
 269         /* unmute adc channles, adc aux mode */
 270         snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
 271         /* volume */
 272         for (i = 1; i <= num_dacs; ++i) {
 273                 snd_soc_write(codec, AD1836_DAC_L_VOL(i), 0x3FF);
 274                 snd_soc_write(codec, AD1836_DAC_R_VOL(i), 0x3FF);
 275         }
 276
 277         if (ad1836->type == AD1836) {
 278                 /* left/right diff:PGA/MUX */
 279                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
 280                 ret = snd_soc_add_controls(codec, ad1836_controls,
 281                                 ARRAY_SIZE(ad1836_controls));
 282                 if (ret)
 283                         return ret;
 284         } else {
 285                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x00);
 286         }
 287
 288         ret = snd_soc_add_controls(codec, ad183x_dac_controls, num_dacs * 2);
 289         if (ret)
 290                 return ret;
 291
 292         ret = snd_soc_add_controls(codec, ad183x_adc_controls, num_adcs);
 293         if (ret)
 294                 return ret;
 295
 296         ret = snd_soc_dapm_new_controls(dapm, ad183x_dac_dapm_widgets, num_dacs);
 297         if (ret)
 298                 return ret;
 299
 300         ret = snd_soc_dapm_new_controls(dapm, ad183x_adc_dapm_widgets, num_adcs);
 301         if (ret)
 302                 return ret;
 303
 304         ret = snd_soc_dapm_add_routes(dapm, ad183x_dac_routes, num_dacs);
 305         if (ret)
 306                 return ret;
 307
 308         ret = snd_soc_dapm_add_routes(dapm, ad183x_adc_routes, num_adcs);
 309         if (ret)
 310                 return ret;
 311
 312         return ret;
 313 }
 314
 315 /* power down chip */
 316 static int ad1836_remove(struct snd_soc_codec *codec)
 317 {
 318         /* reset clock control mode */
 319         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 320                 AD1836_ADC_SERFMT_MASK, 0);
 321 }
 322
 323 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 324         .probe = ad1836_probe,
 325         .remove = ad1836_remove,
 326         .suspend = ad1836_suspend,
 327         .resume = ad1836_resume,
 328         .reg_cache_size = AD1836_NUM_REGS,
 329         .reg_word_size = sizeof(u16),
 330
 331         .controls = ad183x_controls,
 332         .num_controls = ARRAY_SIZE(ad183x_controls),
 333         .dapm_widgets = ad183x_dapm_widgets,
 334         .num_dapm_widgets = ARRAY_SIZE(ad183x_dapm_widgets),
 335         .dapm_routes = ad183x_dapm_routes,
 336         .num_dapm_routes = ARRAY_SIZE(ad183x_dapm_routes),
 337 };
 338
 339 static int __devinit ad1836_spi_probe(struct spi_device *spi)
 340 {
 341         struct ad1836_priv *ad1836;
 342         int ret;
 343
 344         ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
 345         if (ad1836 == NULL)
 346                 return -ENOMEM;
 347
 348         ad1836->type = spi_get_device_id(spi)->driver_data;
 349
 350         spi_set_drvdata(spi, ad1836);
 351
 352         ret = snd_soc_register_codec(&spi->dev,
 353                         &soc_codec_dev_ad1836, &ad183x_dais[ad1836->type], 1);
 354         if (ret < 0)
 355                 kfree(ad1836);
 356         return ret;
 357 }
 358
 359 static int __devexit ad1836_spi_remove(struct spi_device *spi)
 360 {
 361         snd_soc_unregister_codec(&spi->dev);
 362         kfree(spi_get_drvdata(spi));
 363         return 0;
 364 }
 365 static const struct spi_device_id ad1836_ids[] = {
 366         { "ad1835", AD1835 },
 367         { "ad1836", AD1836 },
 368         { "ad1837", AD1835 },
 369         { "ad1838", AD1838 },
 370         { "ad1839", AD1838 },
 371         { },
 372 };
 373 MODULE_DEVICE_TABLE(spi, ad1836_ids);
 374
 375 static struct spi_driver ad1836_spi_driver = {
 376         .driver = {
 377                 .name   = "ad1836",
 378                 .owner  = THIS_MODULE,
 379         },
 380         .probe          = ad1836_spi_probe,
 381         .remove         = __devexit_p(ad1836_spi_remove),
 382         .id_table       = ad1836_ids,
 383 };
 384
 385 static int __init ad1836_init(void)
 386 {
 387         return spi_register_driver(&ad1836_spi_driver);
 388 }
 389 module_init(ad1836_init);
 390
 391 static void __exit ad1836_exit(void)
 392 {
 393         spi_unregister_driver(&ad1836_spi_driver);
 394 }
 395 module_exit(ad1836_exit);
 396
 397 MODULE_DESCRIPTION("ASoC ad1836 driver");
 398 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 399 MODULE_LICENSE("GPL");