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 struct snd_soc_codec codec; 37 u16 reg_cache[AD1836_NUM_REGS]; 38 }; 39 40 static struct snd_soc_codec *ad1836_codec; 41 struct snd_soc_codec_device soc_codec_dev_ad1836; 42 static int ad1836_register(struct ad1836_priv *ad1836); 43 static void ad1836_unregister(struct ad1836_priv *ad1836); 44 45 /* 46 * AD1836 volume/mute/de-emphasis etc. controls 47 */ 48 static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"}; 49 50 static const struct soc_enum ad1836_deemp_enum = 51 SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp); 52 53 static const struct snd_kcontrol_new ad1836_snd_controls[] = { 54 /* DAC volume control */ 55 SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL, 56 AD1836_DAC_R1_VOL, 0, 0x3FF, 0), 57 SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL, 58 AD1836_DAC_R2_VOL, 0, 0x3FF, 0), 59 SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL, 60 AD1836_DAC_R3_VOL, 0, 0x3FF, 0), 61 62 /* ADC switch control */ 63 SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE, 64 AD1836_ADCR1_MUTE, 1, 1), 65 SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE, 66 AD1836_ADCR2_MUTE, 1, 1), 67 68 /* DAC switch control */ 69 SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE, 70 AD1836_DACR1_MUTE, 1, 1), 71 SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE, 72 AD1836_DACR2_MUTE, 1, 1), 73 SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE, 74 AD1836_DACR3_MUTE, 1, 1), 75 76 /* ADC high-pass filter */ 77 SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1, 78 AD1836_ADC_HIGHPASS_FILTER, 1, 0), 79 80 /* DAC de-emphasis */ 81 SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum), 82 }; 83 84 static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = { 85 SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1, 86 AD1836_DAC_POWERDOWN, 1), 87 SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), 88 SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1, 89 AD1836_ADC_POWERDOWN, 1, NULL, 0), 90 SND_SOC_DAPM_OUTPUT("DAC1OUT"), 91 SND_SOC_DAPM_OUTPUT("DAC2OUT"), 92 SND_SOC_DAPM_OUTPUT("DAC3OUT"), 93 SND_SOC_DAPM_INPUT("ADC1IN"), 94 SND_SOC_DAPM_INPUT("ADC2IN"), 95 }; 96 97 static const struct snd_soc_dapm_route audio_paths[] = { 98 { "DAC", NULL, "ADC_PWR" }, 99 { "ADC", NULL, "ADC_PWR" }, 100 { "DAC1OUT", "DAC1 Switch", "DAC" }, 101 { "DAC2OUT", "DAC2 Switch", "DAC" }, 102 { "DAC3OUT", "DAC3 Switch", "DAC" }, 103 { "ADC", "ADC1 Switch", "ADC1IN" }, 104 { "ADC", "ADC2 Switch", "ADC2IN" }, 105 }; 106 107 /* 108 * DAI ops entries 109 */ 110 111 static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai, 112 unsigned int fmt) 113 { 114 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 115 /* at present, we support adc aux mode to interface with 116 * blackfin sport tdm mode 117 */ 118 case SND_SOC_DAIFMT_DSP_A: 119 break; 120 default: 121 return -EINVAL; 122 } 123 124 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 125 case SND_SOC_DAIFMT_IB_IF: 126 break; 127 default: 128 return -EINVAL; 129 } 130 131 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 132 /* ALCLK,ABCLK are both output, AD1836 can only be master */ 133 case SND_SOC_DAIFMT_CBM_CFM: 134 break; 135 default: 136 return -EINVAL; 137 } 138 139 return 0; 140 } 141 142 static int ad1836_hw_params(struct snd_pcm_substream *substream, 143 struct snd_pcm_hw_params *params, 144 struct snd_soc_dai *dai) 145 { 146 int word_len = 0; 147 148 struct snd_soc_pcm_runtime *rtd = substream->private_data; 149 struct snd_soc_device *socdev = rtd->socdev; 150 struct snd_soc_codec *codec = socdev->card->codec; 151 152 /* bit size */ 153 switch (params_format(params)) { 154 case SNDRV_PCM_FORMAT_S16_LE: 155 word_len = 3; 156 break; 157 case SNDRV_PCM_FORMAT_S20_3LE: 158 word_len = 1; 159 break; 160 case SNDRV_PCM_FORMAT_S24_LE: 161 case SNDRV_PCM_FORMAT_S32_LE: 162 word_len = 0; 163 break; 164 } 165 166 snd_soc_update_bits(codec, AD1836_DAC_CTRL1, 167 AD1836_DAC_WORD_LEN_MASK, word_len); 168 169 snd_soc_update_bits(codec, AD1836_ADC_CTRL2, 170 AD1836_ADC_WORD_LEN_MASK, word_len); 171 172 return 0; 173 } 174 175 #ifdef CONFIG_PM 176 static int ad1836_soc_suspend(struct platform_device *pdev, 177 pm_message_t state) 178 { 179 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 180 struct snd_soc_codec *codec = socdev->card->codec; 181 182 /* reset clock control mode */ 183 u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2); 184 adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK; 185 186 return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2); 187 } 188 189 static int ad1836_soc_resume(struct platform_device *pdev) 190 { 191 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 192 struct snd_soc_codec *codec = socdev->card->codec; 193 194 /* restore clock control mode */ 195 u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2); 196 adc_ctrl2 |= AD1836_ADC_AUX; 197 198 return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2); 199 } 200 #else 201 #define ad1836_soc_suspend NULL 202 #define ad1836_soc_resume NULL 203 #endif 204 205 static int __devinit ad1836_spi_probe(struct spi_device *spi) 206 { 207 struct snd_soc_codec *codec; 208 struct ad1836_priv *ad1836; 209 210 ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL); 211 if (ad1836 == NULL) 212 return -ENOMEM; 213 214 codec = &ad1836->codec; 215 codec->control_data = spi; 216 codec->dev = &spi->dev; 217 218 dev_set_drvdata(&spi->dev, ad1836); 219 220 return ad1836_register(ad1836); 221 } 222 223 static int __devexit ad1836_spi_remove(struct spi_device *spi) 224 { 225 struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev); 226 227 ad1836_unregister(ad1836); 228 return 0; 229 } 230 231 static struct spi_driver ad1836_spi_driver = { 232 .driver = { 233 .name = "ad1836", 234 .owner = THIS_MODULE, 235 }, 236 .probe = ad1836_spi_probe, 237 .remove = __devexit_p(ad1836_spi_remove), 238 }; 239 240 static struct snd_soc_dai_ops ad1836_dai_ops = { 241 .hw_params = ad1836_hw_params, 242 .set_fmt = ad1836_set_dai_fmt, 243 }; 244 245 /* codec DAI instance */ 246 struct snd_soc_dai ad1836_dai = { 247 .name = "AD1836", 248 .playback = { 249 .stream_name = "Playback", 250 .channels_min = 2, 251 .channels_max = 6, 252 .rates = SNDRV_PCM_RATE_48000, 253 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | 254 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, 255 }, 256 .capture = { 257 .stream_name = "Capture", 258 .channels_min = 2, 259 .channels_max = 4, 260 .rates = SNDRV_PCM_RATE_48000, 261 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | 262 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, 263 }, 264 .ops = &ad1836_dai_ops, 265 }; 266 EXPORT_SYMBOL_GPL(ad1836_dai); 267 268 static int ad1836_register(struct ad1836_priv *ad1836) 269 { 270 int ret; 271 struct snd_soc_codec *codec = &ad1836->codec; 272 273 if (ad1836_codec) { 274 dev_err(codec->dev, "Another ad1836 is registered\n"); 275 return -EINVAL; 276 } 277 278 mutex_init(&codec->mutex); 279 INIT_LIST_HEAD(&codec->dapm_widgets); 280 INIT_LIST_HEAD(&codec->dapm_paths); 281 snd_soc_codec_set_drvdata(codec, ad1836); 282 codec->reg_cache = ad1836->reg_cache; 283 codec->reg_cache_size = AD1836_NUM_REGS; 284 codec->name = "AD1836"; 285 codec->owner = THIS_MODULE; 286 codec->dai = &ad1836_dai; 287 codec->num_dai = 1; 288 INIT_LIST_HEAD(&codec->dapm_widgets); 289 INIT_LIST_HEAD(&codec->dapm_paths); 290 291 ad1836_dai.dev = codec->dev; 292 ad1836_codec = codec; 293 294 ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI); 295 if (ret < 0) { 296 dev_err(codec->dev, "failed to set cache I/O: %d\n", 297 ret); 298 kfree(ad1836); 299 return ret; 300 } 301 302 /* default setting for ad1836 */ 303 /* de-emphasis: 48kHz, power-on dac */ 304 snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300); 305 /* unmute dac channels */ 306 snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0); 307 /* high-pass filter enable, power-on adc */ 308 snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100); 309 /* unmute adc channles, adc aux mode */ 310 snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180); 311 /* left/right diff:PGA/MUX */ 312 snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A); 313 /* volume */ 314 snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF); 315 snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF); 316 snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF); 317 snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF); 318 snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF); 319 snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF); 320 321 ret = snd_soc_register_codec(codec); 322 if (ret != 0) { 323 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 324 kfree(ad1836); 325 return ret; 326 } 327 328 ret = snd_soc_register_dai(&ad1836_dai); 329 if (ret != 0) { 330 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 331 snd_soc_unregister_codec(codec); 332 kfree(ad1836); 333 return ret; 334 } 335 336 return 0; 337 } 338 339 static void ad1836_unregister(struct ad1836_priv *ad1836) 340 { 341 snd_soc_unregister_dai(&ad1836_dai); 342 snd_soc_unregister_codec(&ad1836->codec); 343 kfree(ad1836); 344 ad1836_codec = NULL; 345 } 346 347 static int ad1836_probe(struct platform_device *pdev) 348 { 349 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 350 struct snd_soc_codec *codec; 351 int ret = 0; 352 353 if (ad1836_codec == NULL) { 354 dev_err(&pdev->dev, "Codec device not registered\n"); 355 return -ENODEV; 356 } 357 358 socdev->card->codec = ad1836_codec; 359 codec = ad1836_codec; 360 361 /* register pcms */ 362 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 363 if (ret < 0) { 364 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 365 goto pcm_err; 366 } 367 368 snd_soc_add_controls(codec, ad1836_snd_controls, 369 ARRAY_SIZE(ad1836_snd_controls)); 370 snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets, 371 ARRAY_SIZE(ad1836_dapm_widgets)); 372 snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); 373 374 pcm_err: 375 return ret; 376 } 377 378 /* power down chip */ 379 static int ad1836_remove(struct platform_device *pdev) 380 { 381 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 382 383 snd_soc_free_pcms(socdev); 384 snd_soc_dapm_free(socdev); 385 386 return 0; 387 } 388 389 struct snd_soc_codec_device soc_codec_dev_ad1836 = { 390 .probe = ad1836_probe, 391 .remove = ad1836_remove, 392 .suspend = ad1836_soc_suspend, 393 .resume = ad1836_soc_resume, 394 }; 395 EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836); 396 397 static int __init ad1836_init(void) 398 { 399 int ret; 400 401 ret = spi_register_driver(&ad1836_spi_driver); 402 if (ret != 0) { 403 printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n", 404 ret); 405 } 406 407 return ret; 408 } 409 module_init(ad1836_init); 410 411 static void __exit ad1836_exit(void) 412 { 413 spi_unregister_driver(&ad1836_spi_driver); 414 } 415 module_exit(ad1836_exit); 416 417 MODULE_DESCRIPTION("ASoC ad1836 driver"); 418 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); 419 MODULE_LICENSE("GPL"); 420