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 #define AD1836_DAC_VOLUME(x) \
  48         SOC_DOUBLE_R("DAC" #x " Playback Volume", AD1836_DAC_L_VOL(x), \
  49                         AD1836_DAC_R_VOL(x), 0, 0x3FF, 0)
  50
  51 #define AD1836_DAC_SWITCH(x) \
  52         SOC_DOUBLE("DAC" #x " Playback Switch", AD1836_DAC_CTRL2, \
  53                         AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
  54
  55 #define AD1836_ADC_SWITCH(x) \
  56         SOC_DOUBLE("ADC" #x " Capture Switch", AD1836_ADC_CTRL2, \
  57                 AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)
  58
  59 static const struct snd_kcontrol_new ad1836_snd_controls[] = {
  60         /* DAC volume control */
  61         AD1836_DAC_VOLUME(1),
  62         AD1836_DAC_VOLUME(2),
  63         AD1836_DAC_VOLUME(3),
  64
  65         /* ADC switch control */
  66         AD1836_ADC_SWITCH(1),
  67         AD1836_ADC_SWITCH(2),
  68
  69         /* DAC switch control */
  70         AD1836_DAC_SWITCH(1),
  71         AD1836_DAC_SWITCH(2),
  72         AD1836_DAC_SWITCH(3),
  73
  74         /* ADC high-pass filter */
  75         SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
  76                         AD1836_ADC_HIGHPASS_FILTER, 1, 0),
  77
  78         /* DAC de-emphasis */
  79         SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
  80 };
  81
  82 static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = {
  83         SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
  84                                 AD1836_DAC_POWERDOWN, 1),
  85         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
  86         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
  87                                 AD1836_ADC_POWERDOWN, 1, NULL, 0),
  88         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  89         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  90         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  91         SND_SOC_DAPM_INPUT("ADC1IN"),
  92         SND_SOC_DAPM_INPUT("ADC2IN"),
  93 };
  94
  95 static const struct snd_soc_dapm_route audio_paths[] = {
  96         { "DAC", NULL, "ADC_PWR" },
  97         { "ADC", NULL, "ADC_PWR" },
  98         { "DAC1OUT", "DAC1 Switch", "DAC" },
  99         { "DAC2OUT", "DAC2 Switch", "DAC" },
 100         { "DAC3OUT", "DAC3 Switch", "DAC" },
 101         { "ADC", "ADC1 Switch", "ADC1IN" },
 102         { "ADC", "ADC2 Switch", "ADC2IN" },
 103 };
 104
 105 /*
 106  * DAI ops entries
 107  */
 108
 109 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
 110                 unsigned int fmt)
 111 {
 112         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 113         /* at present, we support adc aux mode to interface with
 114          * blackfin sport tdm mode
 115          */
 116         case SND_SOC_DAIFMT_DSP_A:
 117                 break;
 118         default:
 119                 return -EINVAL;
 120         }
 121
 122         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 123         case SND_SOC_DAIFMT_IB_IF:
 124                 break;
 125         default:
 126                 return -EINVAL;
 127         }
 128
 129         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 130         /* ALCLK,ABCLK are both output, AD1836 can only be master */
 131         case SND_SOC_DAIFMT_CBM_CFM:
 132                 break;
 133         default:
 134                 return -EINVAL;
 135         }
 136
 137         return 0;
 138 }
 139
 140 static int ad1836_hw_params(struct snd_pcm_substream *substream,
 141                 struct snd_pcm_hw_params *params,
 142                 struct snd_soc_dai *dai)
 143 {
 144         int word_len = 0;
 145
 146         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 147         struct snd_soc_codec *codec = rtd->codec;
 148
 149         /* bit size */
 150         switch (params_format(params)) {
 151         case SNDRV_PCM_FORMAT_S16_LE:
 152                 word_len = 3;
 153                 break;
 154         case SNDRV_PCM_FORMAT_S20_3LE:
 155                 word_len = 1;
 156                 break;
 157         case SNDRV_PCM_FORMAT_S24_LE:
 158         case SNDRV_PCM_FORMAT_S32_LE:
 159                 word_len = 0;
 160                 break;
 161         }
 162
 163         snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
 164                 AD1836_DAC_WORD_LEN_MASK, word_len);
 165
 166         snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
 167                 AD1836_ADC_WORD_LEN_MASK, word_len);
 168
 169         return 0;
 170 }
 171
 172 #ifdef CONFIG_PM
 173 static int ad1836_soc_suspend(struct snd_soc_codec *codec,
 174                 pm_message_t state)
 175 {
 176         /* reset clock control mode */
 177         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 178         adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
 179
 180         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 181 }
 182
 183 static int ad1836_soc_resume(struct snd_soc_codec *codec)
 184 {
 185         /* restore clock control mode */
 186         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 187         adc_ctrl2 |= AD1836_ADC_AUX;
 188
 189         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 190 }
 191 #else
 192 #define ad1836_soc_suspend NULL
 193 #define ad1836_soc_resume  NULL
 194 #endif
 195
 196 static struct snd_soc_dai_ops ad1836_dai_ops = {
 197         .hw_params = ad1836_hw_params,
 198         .set_fmt = ad1836_set_dai_fmt,
 199 };
 200
 201 /* codec DAI instance */
 202 static struct snd_soc_dai_driver ad1836_dai = {
 203         .name = "ad1836-hifi",
 204         .playback = {
 205                 .stream_name = "Playback",
 206                 .channels_min = 2,
 207                 .channels_max = 6,
 208                 .rates = SNDRV_PCM_RATE_48000,
 209                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 210                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 211         },
 212         .capture = {
 213                 .stream_name = "Capture",
 214                 .channels_min = 2,
 215                 .channels_max = 4,
 216                 .rates = SNDRV_PCM_RATE_48000,
 217                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 218                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 219         },
 220         .ops = &ad1836_dai_ops,
 221 };
 222
 223 static int ad1836_probe(struct snd_soc_codec *codec)
 224 {
 225         struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
 226         struct snd_soc_dapm_context *dapm = &codec->dapm;
 227         int ret = 0;
 228
 229         codec->control_data = ad1836->control_data;
 230         ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
 231         if (ret < 0) {
 232                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 233                                 ret);
 234                 return ret;
 235         }
 236
 237         /* default setting for ad1836 */
 238         /* de-emphasis: 48kHz, power-on dac */
 239         snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
 240         /* unmute dac channels */
 241         snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
 242         /* high-pass filter enable, power-on adc */
 243         snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
 244         /* unmute adc channles, adc aux mode */
 245         snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
 246         /* left/right diff:PGA/MUX */
 247         snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
 248         /* volume */
 249         snd_soc_write(codec, AD1836_DAC_L_VOL(1), 0x3FF);
 250         snd_soc_write(codec, AD1836_DAC_R_VOL(1), 0x3FF);
 251         snd_soc_write(codec, AD1836_DAC_L_VOL(2), 0x3FF);
 252         snd_soc_write(codec, AD1836_DAC_R_VOL(2), 0x3FF);
 253         snd_soc_write(codec, AD1836_DAC_L_VOL(3), 0x3FF);
 254         snd_soc_write(codec, AD1836_DAC_R_VOL(3), 0x3FF);
 255
 256         snd_soc_add_controls(codec, ad1836_snd_controls,
 257                              ARRAY_SIZE(ad1836_snd_controls));
 258         snd_soc_dapm_new_controls(dapm, ad1836_dapm_widgets,
 259                                   ARRAY_SIZE(ad1836_dapm_widgets));
 260         snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
 261
 262         return ret;
 263 }
 264
 265 /* power down chip */
 266 static int ad1836_remove(struct snd_soc_codec *codec)
 267 {
 268         /* reset clock control mode */
 269         u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 270         adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
 271
 272         return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 273 }
 274
 275 static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 276         .probe =        ad1836_probe,
 277         .remove =       ad1836_remove,
 278         .suspend =      ad1836_soc_suspend,
 279         .resume =       ad1836_soc_resume,
 280         .reg_cache_size = AD1836_NUM_REGS,
 281         .reg_word_size = sizeof(u16),
 282 };
 283
 284 static int __devinit ad1836_spi_probe(struct spi_device *spi)
 285 {
 286         struct ad1836_priv *ad1836;
 287         int ret;
 288
 289         ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
 290         if (ad1836 == NULL)
 291                 return -ENOMEM;
 292
 293         spi_set_drvdata(spi, ad1836);
 294         ad1836->control_data = spi;
 295         ad1836->control_type = SND_SOC_SPI;
 296
 297         ret = snd_soc_register_codec(&spi->dev,
 298                         &soc_codec_dev_ad1836, &ad1836_dai, 1);
 299         if (ret < 0)
 300                 kfree(ad1836);
 301         return ret;
 302 }
 303
 304 static int __devexit ad1836_spi_remove(struct spi_device *spi)
 305 {
 306         snd_soc_unregister_codec(&spi->dev);
 307         kfree(spi_get_drvdata(spi));
 308         return 0;
 309 }
 310
 311 static struct spi_driver ad1836_spi_driver = {
 312         .driver = {
 313                 .name   = "ad1836-codec",
 314                 .owner  = THIS_MODULE,
 315         },
 316         .probe          = ad1836_spi_probe,
 317         .remove         = __devexit_p(ad1836_spi_remove),
 318 };
 319
 320 static int __init ad1836_init(void)
 321 {
 322         int ret;
 323
 324         ret = spi_register_driver(&ad1836_spi_driver);
 325         if (ret != 0) {
 326                 printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
 327                                 ret);
 328         }
 329
 330         return ret;
 331 }
 332 module_init(ad1836_init);
 333
 334 static void __exit ad1836_exit(void)
 335 {
 336         spi_unregister_driver(&ad1836_spi_driver);
 337 }
 338 module_exit(ad1836_exit);
 339
 340 MODULE_DESCRIPTION("ASoC ad1836 driver");
 341 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 342 MODULE_LICENSE("GPL");