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/module.h> 21 #include <linux/kernel.h> 22 #include <linux/device.h> 23 #include <sound/core.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/initval.h> 27 #include <sound/soc.h> 28 #include <sound/tlv.h> 29 #include <sound/soc-dapm.h> 30 #include <linux/spi/spi.h> 31 #include "ad1836.h" 32 33 /* codec private data */ 34 struct ad1836_priv { 35 struct snd_soc_codec codec; 36 u16 reg_cache[AD1836_NUM_REGS]; 37 }; 38 39 static struct snd_soc_codec *ad1836_codec; 40 struct snd_soc_codec_device soc_codec_dev_ad1836; 41 static int ad1836_register(struct ad1836_priv *ad1836); 42 static void ad1836_unregister(struct ad1836_priv *ad1836); 43 44 /* 45 * AD1836 volume/mute/de-emphasis etc. controls 46 */ 47 static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"}; 48 49 static const struct soc_enum ad1836_deemp_enum = 50 SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp); 51 52 static const struct snd_kcontrol_new ad1836_snd_controls[] = { 53 /* DAC volume control */ 54 SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL, 55 AD1836_DAC_R1_VOL, 0, 0x3FF, 0), 56 SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL, 57 AD1836_DAC_R2_VOL, 0, 0x3FF, 0), 58 SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL, 59 AD1836_DAC_R3_VOL, 0, 0x3FF, 0), 60 61 /* ADC switch control */ 62 SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE, 63 AD1836_ADCR1_MUTE, 1, 1), 64 SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE, 65 AD1836_ADCR2_MUTE, 1, 1), 66 67 /* DAC switch control */ 68 SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE, 69 AD1836_DACR1_MUTE, 1, 1), 70 SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE, 71 AD1836_DACR2_MUTE, 1, 1), 72 SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE, 73 AD1836_DACR3_MUTE, 1, 1), 74 75 /* ADC high-pass filter */ 76 SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1, 77 AD1836_ADC_HIGHPASS_FILTER, 1, 0), 78 79 /* DAC de-emphasis */ 80 SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum), 81 }; 82 83 static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = { 84 SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1, 85 AD1836_DAC_POWERDOWN, 1), 86 SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), 87 SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1, 88 AD1836_ADC_POWERDOWN, 1, NULL, 0), 89 SND_SOC_DAPM_OUTPUT("DAC1OUT"), 90 SND_SOC_DAPM_OUTPUT("DAC2OUT"), 91 SND_SOC_DAPM_OUTPUT("DAC3OUT"), 92 SND_SOC_DAPM_INPUT("ADC1IN"), 93 SND_SOC_DAPM_INPUT("ADC2IN"), 94 }; 95 96 static const struct snd_soc_dapm_route audio_paths[] = { 97 { "DAC", NULL, "ADC_PWR" }, 98 { "ADC", NULL, "ADC_PWR" }, 99 { "DAC1OUT", "DAC1 Switch", "DAC" }, 100 { "DAC2OUT", "DAC2 Switch", "DAC" }, 101 { "DAC3OUT", "DAC3 Switch", "DAC" }, 102 { "ADC", "ADC1 Switch", "ADC1IN" }, 103 { "ADC", "ADC2 Switch", "ADC2IN" }, 104 }; 105 106 /* 107 * DAI ops entries 108 */ 109 110 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai, 111 unsigned int fmt) 112 { 113 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 114 /* at present, we support adc aux mode to interface with 115 * blackfin sport tdm mode 116 */ 117 case SND_SOC_DAIFMT_DSP_A: 118 break; 119 default: 120 return -EINVAL; 121 } 122 123 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 124 case SND_SOC_DAIFMT_IB_IF: 125 break; 126 default: 127 return -EINVAL; 128 } 129 130 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 131 /* ALCLK,ABCLK are both output, AD1836 can only be master */ 132 case SND_SOC_DAIFMT_CBM_CFM: 133 break; 134 default: 135 return -EINVAL; 136 } 137 138 return 0; 139 } 140 141 static int ad1836_hw_params(struct snd_pcm_substream *substream, 142 struct snd_pcm_hw_params *params, 143 struct snd_soc_dai *dai) 144 { 145 int word_len = 0; 146 147 struct snd_soc_pcm_runtime *rtd = substream->private_data; 148 struct snd_soc_device *socdev = rtd->socdev; 149 struct snd_soc_codec *codec = socdev->card->codec; 150 151 /* bit size */ 152 switch (params_format(params)) { 153 case SNDRV_PCM_FORMAT_S16_LE: 154 word_len = 3; 155 break; 156 case SNDRV_PCM_FORMAT_S20_3LE: 157 word_len = 1; 158 break; 159 case SNDRV_PCM_FORMAT_S24_LE: 160 case SNDRV_PCM_FORMAT_S32_LE: 161 word_len = 0; 162 break; 163 } 164 165 snd_soc_update_bits(codec, AD1836_DAC_CTRL1, 166 AD1836_DAC_WORD_LEN_MASK, word_len); 167 168 snd_soc_update_bits(codec, AD1836_ADC_CTRL2, 169 AD1836_ADC_WORD_LEN_MASK, word_len); 170 171 return 0; 172 } 173 174 #ifdef CONFIG_PM 175 static int ad1836_soc_suspend(struct platform_device *pdev, 176 pm_message_t state) 177 { 178 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 179 struct snd_soc_codec *codec = socdev->card->codec; 180 181 /* reset clock control mode */ 182 u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2); 183 adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK; 184 185 return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2); 186 } 187 188 static int ad1836_soc_resume(struct platform_device *pdev) 189 { 190 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 191 struct snd_soc_codec *codec = socdev->card->codec; 192 193 /* restore clock control mode */ 194 u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2); 195 adc_ctrl2 |= AD1836_ADC_AUX; 196 197 return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2); 198 } 199 #else 200 #define ad1836_soc_suspend NULL 201 #define ad1836_soc_resume NULL 202 #endif 203 204 static int __devinit ad1836_spi_probe(struct spi_device *spi) 205 { 206 struct snd_soc_codec *codec; 207 struct ad1836_priv *ad1836; 208 209 ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL); 210 if (ad1836 == NULL) 211 return -ENOMEM; 212 213 codec = &ad1836->codec; 214 codec->control_data = spi; 215 codec->dev = &spi->dev; 216 217 dev_set_drvdata(&spi->dev, ad1836); 218 219 return ad1836_register(ad1836); 220 } 221 222 static int __devexit ad1836_spi_remove(struct spi_device *spi) 223 { 224 struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev); 225 226 ad1836_unregister(ad1836); 227 return 0; 228 } 229 230 static struct spi_driver ad1836_spi_driver = { 231 .driver = { 232 .name = "ad1836", 233 .owner = THIS_MODULE, 234 }, 235 .probe = ad1836_spi_probe, 236 .remove = __devexit_p(ad1836_spi_remove), 237 }; 238 239 static struct snd_soc_dai_ops ad1836_dai_ops = { 240 .hw_params = ad1836_hw_params, 241 .set_fmt = ad1836_set_dai_fmt, 242 }; 243 244 /* codec DAI instance */ 245 struct snd_soc_dai ad1836_dai = { 246 .name = "AD1836", 247 .playback = { 248 .stream_name = "Playback", 249 .channels_min = 2, 250 .channels_max = 6, 251 .rates = SNDRV_PCM_RATE_48000, 252 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | 253 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, 254 }, 255 .capture = { 256 .stream_name = "Capture", 257 .channels_min = 2, 258 .channels_max = 4, 259 .rates = SNDRV_PCM_RATE_48000, 260 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | 261 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, 262 }, 263 .ops = &ad1836_dai_ops, 264 }; 265 EXPORT_SYMBOL_GPL(ad1836_dai); 266 267 static int ad1836_register(struct ad1836_priv *ad1836) 268 { 269 int ret; 270 struct snd_soc_codec *codec = &ad1836->codec; 271 272 if (ad1836_codec) { 273 dev_err(codec->dev, "Another ad1836 is registered\n"); 274 return -EINVAL; 275 } 276 277 mutex_init(&codec->mutex); 278 INIT_LIST_HEAD(&codec->dapm_widgets); 279 INIT_LIST_HEAD(&codec->dapm_paths); 280 snd_soc_codec_set_drvdata(codec, ad1836); 281 codec->reg_cache = ad1836->reg_cache; 282 codec->reg_cache_size = AD1836_NUM_REGS; 283 codec->name = "AD1836"; 284 codec->owner = THIS_MODULE; 285 codec->dai = &ad1836_dai; 286 codec->num_dai = 1; 287 INIT_LIST_HEAD(&codec->dapm_widgets); 288 INIT_LIST_HEAD(&codec->dapm_paths); 289 290 ad1836_dai.dev = codec->dev; 291 ad1836_codec = codec; 292 293 ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI); 294 if (ret < 0) { 295 dev_err(codec->dev, "failed to set cache I/O: %d\n", 296 ret); 297 kfree(ad1836); 298 return ret; 299 } 300 301 /* default setting for ad1836 */ 302 /* de-emphasis: 48kHz, power-on dac */ 303 snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300); 304 /* unmute dac channels */ 305 snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0); 306 /* high-pass filter enable, power-on adc */ 307 snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100); 308 /* unmute adc channles, adc aux mode */ 309 snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180); 310 /* left/right diff:PGA/MUX */ 311 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A); 312 /* volume */ 313 snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF); 314 snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF); 315 snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF); 316 snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF); 317 snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF); 318 snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF); 319 320 ret = snd_soc_register_codec(codec); 321 if (ret != 0) { 322 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 323 kfree(ad1836); 324 return ret; 325 } 326 327 ret = snd_soc_register_dai(&ad1836_dai); 328 if (ret != 0) { 329 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 330 snd_soc_unregister_codec(codec); 331 kfree(ad1836); 332 return ret; 333 } 334 335 return 0; 336 } 337 338 static void ad1836_unregister(struct ad1836_priv *ad1836) 339 { 340 snd_soc_unregister_dai(&ad1836_dai); 341 snd_soc_unregister_codec(&ad1836->codec); 342 kfree(ad1836); 343 ad1836_codec = NULL; 344 } 345 346 static int ad1836_probe(struct platform_device *pdev) 347 { 348 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 349 struct snd_soc_codec *codec; 350 int ret = 0; 351 352 if (ad1836_codec == NULL) { 353 dev_err(&pdev->dev, "Codec device not registered\n"); 354 return -ENODEV; 355 } 356 357 socdev->card->codec = ad1836_codec; 358 codec = ad1836_codec; 359 360 /* register pcms */ 361 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 362 if (ret < 0) { 363 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 364 goto pcm_err; 365 } 366 367 snd_soc_add_controls(codec, ad1836_snd_controls, 368 ARRAY_SIZE(ad1836_snd_controls)); 369 snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets, 370 ARRAY_SIZE(ad1836_dapm_widgets)); 371 snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); 372 373 pcm_err: 374 return ret; 375 } 376 377 /* power down chip */ 378 static int ad1836_remove(struct platform_device *pdev) 379 { 380 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 381 382 snd_soc_free_pcms(socdev); 383 snd_soc_dapm_free(socdev); 384 385 return 0; 386 } 387 388 struct snd_soc_codec_device soc_codec_dev_ad1836 = { 389 .probe = ad1836_probe, 390 .remove = ad1836_remove, 391 .suspend = ad1836_soc_suspend, 392 .resume = ad1836_soc_resume, 393 }; 394 EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836); 395 396 static int __init ad1836_init(void) 397 { 398 int ret; 399 400 ret = spi_register_driver(&ad1836_spi_driver); 401 if (ret != 0) { 402 printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n", 403 ret); 404 } 405 406 return ret; 407 } 408 module_init(ad1836_init); 409 410 static void __exit ad1836_exit(void) 411 { 412 spi_unregister_driver(&ad1836_spi_driver); 413 } 414 module_exit(ad1836_exit); 415 416 MODULE_DESCRIPTION("ASoC ad1836 driver"); 417 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); 418 MODULE_LICENSE("GPL"); 419