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 /* codec private data */
  34 struct ad1836_priv {
  35         enum snd_soc_control_type control_type;
  36         void *control_data;
  37 };
  38
  39 /*
  40  * AD1836 volume/mute/de-emphasis etc. controls
  41  */
  42 static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
  43
  44 static const struct soc_enum ad1836_deemp_enum =
  45         SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
  46
  47 static const struct snd_kcontrol_new ad1836_snd_controls[] = {
  48         /* DAC volume control */
  49         SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL,
  50                         AD1836_DAC_R1_VOL, 0, 0x3FF, 0),
  51         SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL,
  52                         AD1836_DAC_R2_VOL, 0, 0x3FF, 0),
  53         SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL,
  54                         AD1836_DAC_R3_VOL, 0, 0x3FF, 0),
  55
  56         /* ADC switch control */
  57         SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE,
  58                 AD1836_ADCR1_MUTE, 1, 1),
  59         SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE,
  60                 AD1836_ADCR2_MUTE, 1, 1),
  61
  62         /* DAC switch control */
  63         SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE,
  64                 AD1836_DACR1_MUTE, 1, 1),
  65         SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE,
  66                 AD1836_DACR2_MUTE, 1, 1),
  67         SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE,
  68                 AD1836_DACR3_MUTE, 1, 1),
  69
  70         /* ADC high-pass filter */
  71         SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
  72                         AD1836_ADC_HIGHPASS_FILTER, 1, 0),
  73
  74         /* DAC de-emphasis */
  75         SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
  76 };
  77
  78 static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = {
  79         SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
  80                                 AD1836_DAC_POWERDOWN, 1),
  81         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
  82         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
  83                                 AD1836_ADC_POWERDOWN, 1, NULL, 0),
  84         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  85         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  86         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  87         SND_SOC_DAPM_INPUT("ADC1IN"),
  88         SND_SOC_DAPM_INPUT("ADC2IN"),
  89 };
  90
  91 static const struct snd_soc_dapm_route audio_paths[] = {
  92         { "DAC", NULL, "ADC_PWR" },
  93         { "ADC", NULL, "ADC_PWR" },
  94         { "DAC1OUT", "DAC1 Switch", "DAC" },
  95         { "DAC2OUT", "DAC2 Switch", "DAC" },
  96         { "DAC3OUT", "DAC3 Switch", "DAC" },
  97         { "ADC", "ADC1 Switch", "ADC1IN" },
  98         { "ADC", "ADC2 Switch", "ADC2IN" },
  99 };
 100
 101 /*
 102  * DAI ops entries
 103  */
 104
 105 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
 106                 unsigned int fmt)
 107 {
 108         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 109         /* at present, we support adc aux mode to interface with
 110          * blackfin sport tdm mode
 111          */
 112         case SND_SOC_DAIFMT_DSP_A:
 113                 break;
 114         default:
 115                 return -EINVAL;
 116         }
 117
 118         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 119         case SND_SOC_DAIFMT_IB_IF:
 120                 break;
 121         default:
 122                 return -EINVAL;
 123         }
 124
 125         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 126         /* ALCLK,ABCLK are both output, AD1836 can only be master */
 127         case SND_SOC_DAIFMT_CBM_CFM:
 128                 break;
 129         default:
 130                 return -EINVAL;
 131         }
 132
 133         return 0;
 134 }
 135
 136 static int ad1836_hw_params(struct snd_pcm_substream *substream,
 137                 struct snd_pcm_hw_params *params,
 138                 struct snd_soc_dai *dai)
 139 {
 140         int word_len = 0;
 141
 142         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 143         struct snd_soc_codec *codec = rtd->codec;
 144
 145         /* bit size */
 146         switch (params_format(params)) {
 147         case SNDRV_PCM_FORMAT_S16_LE:
 148                 word_len = 3;
 149                 break;
 150         case SNDRV_PCM_FORMAT_S20_3LE:
 151                 word_len = 1;
 152                 break;
 153         case SNDRV_PCM_FORMAT_S24_LE:
 154         case SNDRV_PCM_FORMAT_S32_LE:
 155                 word_len = 0;
 156                 break;
 157         }
 158
 159         snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
 160                 AD1836_DAC_WORD_LEN_MASK, word_len);
 161
 162         snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 163                 AD1836_ADC_WORD_LEN_MASK, word_len);
 164
 165         return 0;
 166 }
 167
 168 #ifdef CONFIG_PM
 169 static int ad1836_soc_suspend(struct snd_soc_codec *codec,
 170                 pm_message_t state)
 171 {
 172         /* reset clock control mode */
 173         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 174         adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
 175
 176         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 177 }
 178
 179 static int ad1836_soc_resume(struct snd_soc_codec *codec)
 180 {
 181         /* restore clock control mode */
 182         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 183         adc_ctrl2 |= AD1836_ADC_AUX;
 184
 185         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 186 }
 187 #else
 188 #define ad1836_soc_suspend NULL
 189 #define ad1836_soc_resume  NULL
 190 #endif
 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 /* codec DAI instance */
 198 static struct snd_soc_dai_driver ad1836_dai = {
 199         .name = "ad1836-hifi",
 200         .playback = {
 201                 .stream_name = "Playback",
 202                 .channels_min = 2,
 203                 .channels_max = 6,
 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 = 4,
 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 int ad1836_probe(struct snd_soc_codec *codec)
 220 {
 221         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
 222         struct snd_soc_dapm_context *dapm = &codec->dapm;
 223         int ret = 0;
 224
 225         codec->control_data = ad1836->control_data;
 226         ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
 227         if (ret < 0) {
 228                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 229                                 ret);
 230                 return ret;
 231         }
 232
 233         /* default setting for ad1836 */
 234         /* de-emphasis: 48kHz, power-on dac */
 235         snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
 236         /* unmute dac channels */
 237         snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
 238         /* high-pass filter enable, power-on adc */
 239         snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
 240         /* unmute adc channles, adc aux mode */
 241         snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
 242         /* left/right diff:PGA/MUX */
 243         snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
 244         /* volume */
 245         snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF);
 246         snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF);
 247         snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF);
 248         snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF);
 249         snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);
 250         snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);
 251
 252         snd_soc_add_controls(codec, ad1836_snd_controls,
 253                              ARRAY_SIZE(ad1836_snd_controls));
 254         snd_soc_dapm_new_controls(dapm, ad1836_dapm_widgets,
 255                                   ARRAY_SIZE(ad1836_dapm_widgets));
 256         snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
 257
 258         return ret;
 259 }
 260
 261 /* power down chip */
 262 static int ad1836_remove(struct snd_soc_codec *codec)
 263 {
 264         /* reset clock control mode */
 265         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 266         adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
 267
 268         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 269 }
 270
 271 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 272         .probe =        ad1836_probe,
 273         .remove =       ad1836_remove,
 274         .suspend =      ad1836_soc_suspend,
 275         .resume =       ad1836_soc_resume,
 276         .reg_cache_size = AD1836_NUM_REGS,
 277         .reg_word_size = sizeof(u16),
 278 };
 279
 280 static int __devinit ad1836_spi_probe(struct spi_device *spi)
 281 {
 282         struct ad1836_priv *ad1836;
 283         int ret;
 284
 285         ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
 286         if (ad1836 == NULL)
 287                 return -ENOMEM;
 288
 289         spi_set_drvdata(spi, ad1836);
 290         ad1836->control_data = spi;
 291         ad1836->control_type = SND_SOC_SPI;
 292
 293         ret = snd_soc_register_codec(&spi->dev,
 294                         &soc_codec_dev_ad1836, &ad1836_dai, 1);
 295         if (ret < 0)
 296                 kfree(ad1836);
 297         return ret;
 298 }
 299
 300 static int __devexit ad1836_spi_remove(struct spi_device *spi)
 301 {
 302         snd_soc_unregister_codec(&spi->dev);
 303         kfree(spi_get_drvdata(spi));
 304         return 0;
 305 }
 306
 307 static struct spi_driver ad1836_spi_driver = {
 308         .driver = {
 309                 .name   = "ad1836-codec",
 310                 .owner  = THIS_MODULE,
 311         },
 312         .probe          = ad1836_spi_probe,
 313         .remove         = __devexit_p(ad1836_spi_remove),
 314 };
 315
 316 static int __init ad1836_init(void)
 317 {
 318         int ret;
 319
 320         ret = spi_register_driver(&ad1836_spi_driver);
 321         if (ret != 0) {
 322                 printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
 323                                 ret);
 324         }
 325
 326         return ret;
 327 }
 328 module_init(ad1836_init);
 329
 330 static void __exit ad1836_exit(void)
 331 {
 332         spi_unregister_driver(&ad1836_spi_driver);
 333 }
 334 module_exit(ad1836_exit);
 335
 336 MODULE_DESCRIPTION("ASoC ad1836 driver");
 337 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 338 MODULE_LICENSE("GPL");