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         struct snd_soc_codec *codec = dai->codec;
 166
 167         /* bit size */
 168         switch (params_format(params)) {
 169         case SNDRV_PCM_FORMAT_S16_LE:
 170                 word_len = AD1836_WORD_LEN_16;
 171                 break;
 172         case SNDRV_PCM_FORMAT_S20_3LE:
 173                 word_len = AD1836_WORD_LEN_20;
 174                 break;
 175         case SNDRV_PCM_FORMAT_S24_LE:
 176         case SNDRV_PCM_FORMAT_S32_LE:
 177                 word_len = AD1836_WORD_LEN_24;
 178                 break;
 179         }
 180
 181         snd_soc_update_bits(codec, AD1836_DAC_CTRL1, AD1836_DAC_WORD_LEN_MASK,
 182                 word_len << AD1836_DAC_WORD_LEN_OFFSET);
 183
 184         snd_soc_update_bits(codec, AD1836_ADC_CTRL2, AD1836_ADC_WORD_LEN_MASK,
 185                 word_len << AD1836_ADC_WORD_OFFSET);
 186
 187         return 0;
 188 }
 189
 190 static const struct snd_soc_dai_ops ad1836_dai_ops = {
 191         .hw_params = ad1836_hw_params,
 192         .set_fmt = ad1836_set_dai_fmt,
 193 };
 194
 195 #define AD183X_DAI(_name, num_dacs, num_adcs) \
 196 { \
 197         .name = _name "-hifi", \
 198         .playback = { \
 199                 .stream_name = "Playback", \
 200                 .channels_min = 2, \
 201                 .channels_max = (num_dacs) * 2, \
 202                 .rates = SNDRV_PCM_RATE_48000,  \
 203                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 204                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 205         }, \
 206         .capture = { \
 207                 .stream_name = "Capture", \
 208                 .channels_min = 2, \
 209                 .channels_max = (num_adcs) * 2, \
 210                 .rates = SNDRV_PCM_RATE_48000, \
 211                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | \
 212                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, \
 213         }, \
 214         .ops = &ad1836_dai_ops, \
 215 }
 216
 217 static struct snd_soc_dai_driver ad183x_dais[] = {
 218         [AD1835] = AD183X_DAI("ad1835", 4, 1),
 219         [AD1836] = AD183X_DAI("ad1836", 3, 2),
 220         [AD1838] = AD183X_DAI("ad1838", 3, 1),
 221 };
 222
 223 #ifdef CONFIG_PM
 224 static int ad1836_suspend(struct snd_soc_codec *codec)
 225 {
 226         /* reset clock control mode */
 227         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 228                 AD1836_ADC_SERFMT_MASK, 0);
 229 }
 230
 231 static int ad1836_resume(struct snd_soc_codec *codec)
 232 {
 233         /* restore clock control mode */
 234         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 235                 AD1836_ADC_SERFMT_MASK, AD1836_ADC_AUX);
 236 }
 237 #else
 238 #define ad1836_suspend NULL
 239 #define ad1836_resume  NULL
 240 #endif
 241
 242 static int ad1836_probe(struct snd_soc_codec *codec)
 243 {
 244         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
 245         struct snd_soc_dapm_context *dapm = &codec->dapm;
 246         int num_dacs, num_adcs;
 247         int ret = 0;
 248         int i;
 249
 250         num_dacs = ad183x_dais[ad1836->type].playback.channels_max / 2;
 251         num_adcs = ad183x_dais[ad1836->type].capture.channels_max / 2;
 252
 253         ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
 254         if (ret < 0) {
 255                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 256                                 ret);
 257                 return ret;
 258         }
 259
 260         /* default setting for ad1836 */
 261         /* de-emphasis: 48kHz, power-on dac */
 262         snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
 263         /* unmute dac channels */
 264         snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
 265         /* high-pass filter enable, power-on adc */
 266         snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
 267         /* unmute adc channles, adc aux mode */
 268         snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
 269         /* volume */
 270         for (i = 1; i <= num_dacs; ++i) {
 271                 snd_soc_write(codec, AD1836_DAC_L_VOL(i), 0x3FF);
 272                 snd_soc_write(codec, AD1836_DAC_R_VOL(i), 0x3FF);
 273         }
 274
 275         if (ad1836->type == AD1836) {
 276                 /* left/right diff:PGA/MUX */
 277                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
 278                 ret = snd_soc_add_codec_controls(codec, ad1836_controls,
 279                                 ARRAY_SIZE(ad1836_controls));
 280                 if (ret)
 281                         return ret;
 282         } else {
 283                 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x00);
 284         }
 285
 286         ret = snd_soc_add_codec_controls(codec, ad183x_dac_controls, num_dacs * 2);
 287         if (ret)
 288                 return ret;
 289
 290         ret = snd_soc_add_codec_controls(codec, ad183x_adc_controls, num_adcs);
 291         if (ret)
 292                 return ret;
 293
 294         ret = snd_soc_dapm_new_controls(dapm, ad183x_dac_dapm_widgets, num_dacs);
 295         if (ret)
 296                 return ret;
 297
 298         ret = snd_soc_dapm_new_controls(dapm, ad183x_adc_dapm_widgets, num_adcs);
 299         if (ret)
 300                 return ret;
 301
 302         ret = snd_soc_dapm_add_routes(dapm, ad183x_dac_routes, num_dacs);
 303         if (ret)
 304                 return ret;
 305
 306         ret = snd_soc_dapm_add_routes(dapm, ad183x_adc_routes, num_adcs);
 307         if (ret)
 308                 return ret;
 309
 310         return ret;
 311 }
 312
 313 /* power down chip */
 314 static int ad1836_remove(struct snd_soc_codec *codec)
 315 {
 316         /* reset clock control mode */
 317         return snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 318                 AD1836_ADC_SERFMT_MASK, 0);
 319 }
 320
 321 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 322         .probe = ad1836_probe,
 323         .remove = ad1836_remove,
 324         .suspend = ad1836_suspend,
 325         .resume = ad1836_resume,
 326         .reg_cache_size = AD1836_NUM_REGS,
 327         .reg_word_size = sizeof(u16),
 328
 329         .controls = ad183x_controls,
 330         .num_controls = ARRAY_SIZE(ad183x_controls),
 331         .dapm_widgets = ad183x_dapm_widgets,
 332         .num_dapm_widgets = ARRAY_SIZE(ad183x_dapm_widgets),
 333         .dapm_routes = ad183x_dapm_routes,
 334         .num_dapm_routes = ARRAY_SIZE(ad183x_dapm_routes),
 335 };
 336
 337 static int __devinit ad1836_spi_probe(struct spi_device *spi)
 338 {
 339         struct ad1836_priv *ad1836;
 340         int ret;
 341
 342         ad1836 = devm_kzalloc(&spi->dev, sizeof(struct ad1836_priv),
 343                               GFP_KERNEL);
 344         if (ad1836 == NULL)
 345                 return -ENOMEM;
 346
 347         ad1836->type = spi_get_device_id(spi)->driver_data;
 348
 349         spi_set_drvdata(spi, ad1836);
 350
 351         ret = snd_soc_register_codec(&spi->dev,
 352                         &soc_codec_dev_ad1836, &ad183x_dais[ad1836->type], 1);
 353         return ret;
 354 }
 355
 356 static int __devexit ad1836_spi_remove(struct spi_device *spi)
 357 {
 358         snd_soc_unregister_codec(&spi->dev);
 359         return 0;
 360 }
 361
 362 static const struct spi_device_id ad1836_ids[] = {
 363         { "ad1835", AD1835 },
 364         { "ad1836", AD1836 },
 365         { "ad1837", AD1835 },
 366         { "ad1838", AD1838 },
 367         { "ad1839", AD1838 },
 368         { },
 369 };
 370 MODULE_DEVICE_TABLE(spi, ad1836_ids);
 371
 372 static struct spi_driver ad1836_spi_driver = {
 373         .driver = {
 374                 .name   = "ad1836",
 375                 .owner  = THIS_MODULE,
 376         },
 377         .probe          = ad1836_spi_probe,
 378         .remove         = __devexit_p(ad1836_spi_remove),
 379         .id_table       = ad1836_ids,
 380 };
 381
 382 static int __init ad1836_init(void)
 383 {
 384         return spi_register_driver(&ad1836_spi_driver);
 385 }
 386 module_init(ad1836_init);
 387
 388 static void __exit ad1836_exit(void)
 389 {
 390         spi_unregister_driver(&ad1836_spi_driver);
 391 }
 392 module_exit(ad1836_exit);
 393
 394 MODULE_DESCRIPTION("ASoC ad1836 driver");
 395 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 396 MODULE_LICENSE("GPL");