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 <sound/soc-dapm.h>
  31 #include <linux/spi/spi.h>
  32 #include "ad1836.h"
  33
  34 /* codec private data */
  35 struct ad1836_priv {
  36         enum snd_soc_control_type control_type;
  37         void *control_data;
  38 };
  39
  40 /*
  41  * AD1836 volume/mute/de-emphasis etc. controls
  42  */
  43 static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
  44
  45 static const struct soc_enum ad1836_deemp_enum =
  46         SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
  47
  48 static const struct snd_kcontrol_new ad1836_snd_controls[] = {
  49         /* DAC volume control */
  50         SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL,
  51                         AD1836_DAC_R1_VOL, 0, 0x3FF, 0),
  52         SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL,
  53                         AD1836_DAC_R2_VOL, 0, 0x3FF, 0),
  54         SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL,
  55                         AD1836_DAC_R3_VOL, 0, 0x3FF, 0),
  56
  57         /* ADC switch control */
  58         SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE,
  59                 AD1836_ADCR1_MUTE, 1, 1),
  60         SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE,
  61                 AD1836_ADCR2_MUTE, 1, 1),
  62
  63         /* DAC switch control */
  64         SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE,
  65                 AD1836_DACR1_MUTE, 1, 1),
  66         SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE,
  67                 AD1836_DACR2_MUTE, 1, 1),
  68         SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE,
  69                 AD1836_DACR3_MUTE, 1, 1),
  70
  71         /* ADC high-pass filter */
  72         SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
  73                         AD1836_ADC_HIGHPASS_FILTER, 1, 0),
  74
  75         /* DAC de-emphasis */
  76         SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
  77 };
  78
  79 static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = {
  80         SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
  81                                 AD1836_DAC_POWERDOWN, 1),
  82         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
  83         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
  84                                 AD1836_ADC_POWERDOWN, 1, NULL, 0),
  85         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  86         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  87         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  88         SND_SOC_DAPM_INPUT("ADC1IN"),
  89         SND_SOC_DAPM_INPUT("ADC2IN"),
  90 };
  91
  92 static const struct snd_soc_dapm_route audio_paths[] = {
  93         { "DAC", NULL, "ADC_PWR" },
  94         { "ADC", NULL, "ADC_PWR" },
  95         { "DAC1OUT", "DAC1 Switch", "DAC" },
  96         { "DAC2OUT", "DAC2 Switch", "DAC" },
  97         { "DAC3OUT", "DAC3 Switch", "DAC" },
  98         { "ADC", "ADC1 Switch", "ADC1IN" },
  99         { "ADC", "ADC2 Switch", "ADC2IN" },
 100 };
 101
 102 /*
 103  * DAI ops entries
 104  */
 105
 106 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
 107                 unsigned int fmt)
 108 {
 109         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 110         /* at present, we support adc aux mode to interface with
 111          * blackfin sport tdm mode
 112          */
 113         case SND_SOC_DAIFMT_DSP_A:
 114                 break;
 115         default:
 116                 return -EINVAL;
 117         }
 118
 119         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 120         case SND_SOC_DAIFMT_IB_IF:
 121                 break;
 122         default:
 123                 return -EINVAL;
 124         }
 125
 126         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 127         /* ALCLK,ABCLK are both output, AD1836 can only be master */
 128         case SND_SOC_DAIFMT_CBM_CFM:
 129                 break;
 130         default:
 131                 return -EINVAL;
 132         }
 133
 134         return 0;
 135 }
 136
 137 static int ad1836_hw_params(struct snd_pcm_substream *substream,
 138                 struct snd_pcm_hw_params *params,
 139                 struct snd_soc_dai *dai)
 140 {
 141         int word_len = 0;
 142
 143         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 144         struct snd_soc_codec *codec = rtd->codec;
 145
 146         /* bit size */
 147         switch (params_format(params)) {
 148         case SNDRV_PCM_FORMAT_S16_LE:
 149                 word_len = 3;
 150                 break;
 151         case SNDRV_PCM_FORMAT_S20_3LE:
 152                 word_len = 1;
 153                 break;
 154         case SNDRV_PCM_FORMAT_S24_LE:
 155         case SNDRV_PCM_FORMAT_S32_LE:
 156                 word_len = 0;
 157                 break;
 158         }
 159
 160         snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
 161                 AD1836_DAC_WORD_LEN_MASK, word_len);
 162
 163         snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 164                 AD1836_ADC_WORD_LEN_MASK, word_len);
 165
 166         return 0;
 167 }
 168
 169 #ifdef CONFIG_PM
 170 static int ad1836_soc_suspend(struct snd_soc_codec *codec,
 171                 pm_message_t state)
 172 {
 173         /* reset clock control mode */
 174         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 175         adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
 176
 177         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 178 }
 179
 180 static int ad1836_soc_resume(struct snd_soc_codec *codec)
 181 {
 182         /* restore clock control mode */
 183         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 184         adc_ctrl2 |= AD1836_ADC_AUX;
 185
 186         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 187 }
 188 #else
 189 #define ad1836_soc_suspend NULL
 190 #define ad1836_soc_resume  NULL
 191 #endif
 192
 193 static struct snd_soc_dai_ops ad1836_dai_ops = {
 194         .hw_params = ad1836_hw_params,
 195         .set_fmt = ad1836_set_dai_fmt,
 196 };
 197
 198 /* codec DAI instance */
 199 static struct snd_soc_dai_driver ad1836_dai = {
 200         .name = "ad1836-hifi",
 201         .playback = {
 202                 .stream_name = "Playback",
 203                 .channels_min = 2,
 204                 .channels_max = 6,
 205                 .rates = SNDRV_PCM_RATE_48000,
 206                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 207                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 208         },
 209         .capture = {
 210                 .stream_name = "Capture",
 211                 .channels_min = 2,
 212                 .channels_max = 4,
 213                 .rates = SNDRV_PCM_RATE_48000,
 214                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 215                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 216         },
 217         .ops = &ad1836_dai_ops,
 218 };
 219
 220 static int ad1836_probe(struct snd_soc_codec *codec)
 221 {
 222         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
 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                 kfree(ad1836);
 231                 return ret;
 232         }
 233
 234         /* default setting for ad1836 */
 235         /* de-emphasis: 48kHz, power-on dac */
 236         snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
 237         /* unmute dac channels */
 238         snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
 239         /* high-pass filter enable, power-on adc */
 240         snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
 241         /* unmute adc channles, adc aux mode */
 242         snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
 243         /* left/right diff:PGA/MUX */
 244         snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
 245         /* volume */
 246         snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF);
 247         snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF);
 248         snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF);
 249         snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF);
 250         snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);
 251         snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);
 252
 253         snd_soc_add_controls(codec, ad1836_snd_controls,
 254                              ARRAY_SIZE(ad1836_snd_controls));
 255         snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets,
 256                                   ARRAY_SIZE(ad1836_dapm_widgets));
 257         snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
 258
 259         return ret;
 260 }
 261
 262 /* power down chip */
 263 static int ad1836_remove(struct snd_soc_codec *codec)
 264 {
 265         /* reset clock control mode */
 266         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 267         adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
 268
 269         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 270 }
 271
 272 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 273         .probe =        ad1836_probe,
 274         .remove =       ad1836_remove,
 275         .suspend =      ad1836_soc_suspend,
 276         .resume =       ad1836_soc_resume,
 277         .reg_cache_size = AD1836_NUM_REGS,
 278         .reg_word_size = sizeof(u16),
 279 };
 280
 281 static int __devinit ad1836_spi_probe(struct spi_device *spi)
 282 {
 283         struct ad1836_priv *ad1836;
 284         int ret;
 285
 286         ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
 287         if (ad1836 == NULL)
 288                 return -ENOMEM;
 289
 290         spi_set_drvdata(spi, ad1836);
 291         ad1836->control_data = spi;
 292         ad1836->control_type = SND_SOC_SPI;
 293
 294         ret = snd_soc_register_codec(&spi->dev,
 295                         &soc_codec_dev_ad1836, &ad1836_dai, 1);
 296         if (ret < 0)
 297                 kfree(ad1836);
 298         return ret;
 299 }
 300
 301 static int __devexit ad1836_spi_remove(struct spi_device *spi)
 302 {
 303         snd_soc_unregister_codec(&spi->dev);
 304         kfree(spi_get_drvdata(spi));
 305         return 0;
 306 }
 307
 308 static struct spi_driver ad1836_spi_driver = {
 309         .driver = {
 310                 .name   = "ad1836-codec",
 311                 .owner  = THIS_MODULE,
 312         },
 313         .probe          = ad1836_spi_probe,
 314         .remove         = __devexit_p(ad1836_spi_remove),
 315 };
 316
 317 static int __init ad1836_init(void)
 318 {
 319         int ret;
 320
 321         ret = spi_register_driver(&ad1836_spi_driver);
 322         if (ret != 0) {
 323                 printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
 324                                 ret);
 325         }
 326
 327         return ret;
 328 }
 329 module_init(ad1836_init);
 330
 331 static void __exit ad1836_exit(void)
 332 {
 333         spi_unregister_driver(&ad1836_spi_driver);
 334 }
 335 module_exit(ad1836_exit);
 336
 337 MODULE_DESCRIPTION("ASoC ad1836 driver");
 338 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 339 MODULE_LICENSE("GPL");