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 #ifdef CONFIG_PM
 193 static int ad1836_soc_suspend(struct snd_soc_codec *codec,
 194                 pm_message_t state)
 195 {
 196         /* reset clock control mode */
 197         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 198                 AD1836_ADC_SERFMT_MASK, 0);
 199 }
 200
 201 static int ad1836_soc_resume(struct snd_soc_codec *codec)
 202 {
 203         /* restore clock control mode */
 204         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 205                 AD1836_ADC_SERFMT_MASK, AD1836_ADC_AUX);
 206 }
 207 #else
 208 #define ad1836_soc_suspend NULL
 209 #define ad1836_soc_resume  NULL
 210 #endif
 211
 212 static struct snd_soc_dai_ops ad1836_dai_ops = {
 213         .hw_params = ad1836_hw_params,
 214         .set_fmt = ad1836_set_dai_fmt,
 215 };
 216
 217 #define AD183X_DAI(_name, num_dacs, num_adcs) \
 218 { \
 219         .name = _name "-hifi", \
 220         .playback = { \
 221                 .stream_name = "Playback", \
 222                 .channels_min = 2, \
 223                 .channels_max = (num_dacs) * 2, \
 224                 .rates = SNDRV_PCM_RATE_48000,  \
 225                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 226                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 227         }, \
 228         .capture = { \
 229                 .stream_name = "Capture", \
 230                 .channels_min = 2, \
 231                 .channels_max = (num_adcs) * 2, \
 232                 .rates = SNDRV_PCM_RATE_48000, \
 233                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 234                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 235         }, \
 236         .ops = &ad1836_dai_ops, \
 237 }
 238
 239 static struct snd_soc_dai_driver ad183x_dais[] = {
 240         [AD1835] = AD183X_DAI("ad1835", 4, 1),
 241         [AD1836] = AD183X_DAI("ad1836", 3, 2),
 242         [AD1838] = AD183X_DAI("ad1838", 3, 1),
 243 };
 244
 245 static int ad1836_probe(struct snd_soc_codec *codec)
 246 {
 247         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
 248         struct snd_soc_dapm_context *dapm = &codec->dapm;
 249         int num_dacs, num_adcs;
 250         int ret = 0;
 251         int i;
 252
 253         num_dacs = ad183x_dais[ad1836->type].playback.channels_max / 2;
 254         num_adcs = ad183x_dais[ad1836->type].capture.channels_max / 2;
 255
 256         ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
 257         if (ret < 0) {
 258                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 259                                 ret);
 260                 return ret;
 261         }
 262
 263         /* default setting for ad1836 */
 264         /* de-emphasis: 48kHz, power-on dac */
 265         snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
 266         /* unmute dac channels */
 267         snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
 268         /* high-pass filter enable, power-on adc */
 269         snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
 270         /* unmute adc channles, adc aux mode */
 271         snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
 272         /* volume */
 273         for (i = 1; i <= num_dacs; ++i) {
 274                 snd_soc_write(codec, AD1836_DAC_L_VOL(i), 0x3FF);
 275                 snd_soc_write(codec, AD1836_DAC_R_VOL(i), 0x3FF);
 276         }
 277
 278         if (ad1836->type == AD1836) {
 279                 /* left/right diff:PGA/MUX */
 280                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
 281                 ret = snd_soc_add_controls(codec, ad1836_controls,
 282                                 ARRAY_SIZE(ad1836_controls));
 283                 if (ret)
 284                         return ret;
 285         } else {
 286                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x00);
 287         }
 288
 289         ret = snd_soc_add_controls(codec, ad183x_dac_controls, num_dacs * 2);
 290         if (ret)
 291                 return ret;
 292
 293         ret = snd_soc_add_controls(codec, ad183x_adc_controls, num_adcs);
 294         if (ret)
 295                 return ret;
 296
 297         ret = snd_soc_dapm_new_controls(dapm, ad183x_dac_dapm_widgets, num_dacs);
 298         if (ret)
 299                 return ret;
 300
 301         ret = snd_soc_dapm_new_controls(dapm, ad183x_adc_dapm_widgets, num_adcs);
 302         if (ret)
 303                 return ret;
 304
 305         ret = snd_soc_dapm_add_routes(dapm, ad183x_dac_routes, num_dacs);
 306         if (ret)
 307                 return ret;
 308
 309         ret = snd_soc_dapm_add_routes(dapm, ad183x_adc_routes, num_adcs);
 310         if (ret)
 311                 return ret;
 312
 313         return ret;
 314 }
 315
 316 /* power down chip */
 317 static int ad1836_remove(struct snd_soc_codec *codec)
 318 {
 319         /* reset clock control mode */
 320         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 321                 AD1836_ADC_SERFMT_MASK, 0);
 322 }
 323
 324 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 325         .probe =        ad1836_probe,
 326         .remove =       ad1836_remove,
 327         .suspend =      ad1836_soc_suspend,
 328         .resume =       ad1836_soc_resume,
 329         .reg_cache_size = AD1836_NUM_REGS,
 330         .reg_word_size = sizeof(u16),
 331
 332         .controls = ad183x_controls,
 333         .num_controls = ARRAY_SIZE(ad183x_controls),
 334         .dapm_widgets = ad183x_dapm_widgets,
 335         .num_dapm_widgets = ARRAY_SIZE(ad183x_dapm_widgets),
 336         .dapm_routes = ad183x_dapm_routes,
 337         .num_dapm_routes = ARRAY_SIZE(ad183x_dapm_routes),
 338 };
 339
 340 static int __devinit ad1836_spi_probe(struct spi_device *spi)
 341 {
 342         struct ad1836_priv *ad1836;
 343         int ret;
 344
 345         ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
 346         if (ad1836 == NULL)
 347                 return -ENOMEM;
 348
 349         ad1836->type = spi_get_device_id(spi)->driver_data;
 350
 351         spi_set_drvdata(spi, ad1836);
 352
 353         ret = snd_soc_register_codec(&spi->dev,
 354                         &soc_codec_dev_ad1836, &ad183x_dais[ad1836->type], 1);
 355         if (ret < 0)
 356                 kfree(ad1836);
 357         return ret;
 358 }
 359
 360 static int __devexit ad1836_spi_remove(struct spi_device *spi)
 361 {
 362         snd_soc_unregister_codec(&spi->dev);
 363         kfree(spi_get_drvdata(spi));
 364         return 0;
 365 }
 366 static const struct spi_device_id ad1836_ids[] = {
 367         { "ad1835", AD1835 },
 368         { "ad1836", AD1836 },
 369         { "ad1837", AD1835 },
 370         { "ad1838", AD1838 },
 371         { "ad1839", AD1838 },
 372         { },
 373 };
 374 MODULE_DEVICE_TABLE(spi, ad1836_ids);
 375
 376 static struct spi_driver ad1836_spi_driver = {
 377         .driver = {
 378                 .name   = "ad1836-codec",
 379                 .owner  = THIS_MODULE,
 380         },
 381         .probe          = ad1836_spi_probe,
 382         .remove         = __devexit_p(ad1836_spi_remove),
 383         .id_table       = ad1836_ids,
 384 };
 385
 386 static int __init ad1836_init(void)
 387 {
 388         return spi_register_driver(&ad1836_spi_driver);
 389 }
 390 module_init(ad1836_init);
 391
 392 static void __exit ad1836_exit(void)
 393 {
 394         spi_unregister_driver(&ad1836_spi_driver);
 395 }
 396 module_exit(ad1836_exit);
 397
 398 MODULE_DESCRIPTION("ASoC ad1836 driver");
 399 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 400 MODULE_LICENSE("GPL");