release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/codecs/jz4740.c

   1 /*
   2  * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *  You should have received a copy of the  GNU General Public License along
   9  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  10  *  675 Mass Ave, Cambridge, MA 02139, USA.
  11  *
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/slab.h>
  18
  19 #include <linux/delay.h>
  20
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/initval.h>
  25 #include <sound/soc-dapm.h>
  26 #include <sound/soc.h>
  27
  28 #define JZ4740_REG_CODEC_1 0x0
  29 #define JZ4740_REG_CODEC_2 0x1
  30
  31 #define JZ4740_CODEC_1_LINE_ENABLE BIT(29)
  32 #define JZ4740_CODEC_1_MIC_ENABLE BIT(28)
  33 #define JZ4740_CODEC_1_SW1_ENABLE BIT(27)
  34 #define JZ4740_CODEC_1_ADC_ENABLE BIT(26)
  35 #define JZ4740_CODEC_1_SW2_ENABLE BIT(25)
  36 #define JZ4740_CODEC_1_DAC_ENABLE BIT(24)
  37 #define JZ4740_CODEC_1_VREF_DISABLE BIT(20)
  38 #define JZ4740_CODEC_1_VREF_AMP_DISABLE BIT(19)
  39 #define JZ4740_CODEC_1_VREF_PULLDOWN BIT(18)
  40 #define JZ4740_CODEC_1_VREF_LOW_CURRENT BIT(17)
  41 #define JZ4740_CODEC_1_VREF_HIGH_CURRENT BIT(16)
  42 #define JZ4740_CODEC_1_HEADPHONE_DISABLE BIT(14)
  43 #define JZ4740_CODEC_1_HEADPHONE_AMP_CHANGE_ANY BIT(13)
  44 #define JZ4740_CODEC_1_HEADPHONE_CHARGE BIT(12)
  45 #define JZ4740_CODEC_1_HEADPHONE_PULLDOWN (BIT(11) | BIT(10))
  46 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M BIT(9)
  47 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN BIT(8)
  48 #define JZ4740_CODEC_1_SUSPEND BIT(1)
  49 #define JZ4740_CODEC_1_RESET BIT(0)
  50
  51 #define JZ4740_CODEC_1_LINE_ENABLE_OFFSET 29
  52 #define JZ4740_CODEC_1_MIC_ENABLE_OFFSET 28
  53 #define JZ4740_CODEC_1_SW1_ENABLE_OFFSET 27
  54 #define JZ4740_CODEC_1_ADC_ENABLE_OFFSET 26
  55 #define JZ4740_CODEC_1_SW2_ENABLE_OFFSET 25
  56 #define JZ4740_CODEC_1_DAC_ENABLE_OFFSET 24
  57 #define JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET 14
  58 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET 8
  59
  60 #define JZ4740_CODEC_2_INPUT_VOLUME_MASK                0x1f0000
  61 #define JZ4740_CODEC_2_SAMPLE_RATE_MASK                 0x000f00
  62 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_MASK              0x000030
  63 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_MASK    0x000003
  64
  65 #define JZ4740_CODEC_2_INPUT_VOLUME_OFFSET              16
  66 #define JZ4740_CODEC_2_SAMPLE_RATE_OFFSET                8
  67 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET     4
  68 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET   0
  69
  70 static const uint32_t jz4740_codec_regs[] = {
  71         0x021b2302, 0x00170803,
  72 };
  73
  74 struct jz4740_codec {
  75         void __iomem *base;
  76         struct resource *mem;
  77
  78         uint32_t reg_cache[2];
  79         struct snd_soc_codec codec;
  80 };
  81
  82 static inline struct jz4740_codec *codec_to_jz4740(struct snd_soc_codec *codec)
  83 {
  84         return container_of(codec, struct jz4740_codec, codec);
  85 }
  86
  87 static unsigned int jz4740_codec_read(struct snd_soc_codec *codec,
  88         unsigned int reg)
  89 {
  90         struct jz4740_codec *jz4740_codec = codec_to_jz4740(codec);
  91         return readl(jz4740_codec->base + (reg << 2));
  92 }
  93
  94 static int jz4740_codec_write(struct snd_soc_codec *codec, unsigned int reg,
  95         unsigned int val)
  96 {
  97         struct jz4740_codec *jz4740_codec = codec_to_jz4740(codec);
  98
  99         jz4740_codec->reg_cache[reg] = val;
 100         writel(val, jz4740_codec->base + (reg << 2));
 101
 102         return 0;
 103 }
 104
 105 static const struct snd_kcontrol_new jz4740_codec_controls[] = {
 106         SOC_SINGLE("Master Playback Volume", JZ4740_REG_CODEC_2,
 107                         JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET, 3, 0),
 108         SOC_SINGLE("Master Capture Volume", JZ4740_REG_CODEC_2,
 109                         JZ4740_CODEC_2_INPUT_VOLUME_OFFSET, 31, 0),
 110         SOC_SINGLE("Master Playback Switch", JZ4740_REG_CODEC_1,
 111                         JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET, 1, 1),
 112         SOC_SINGLE("Mic Capture Volume", JZ4740_REG_CODEC_2,
 113                         JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET, 3, 0),
 114 };
 115
 116 static const struct snd_kcontrol_new jz4740_codec_output_controls[] = {
 117         SOC_DAPM_SINGLE("Bypass Switch", JZ4740_REG_CODEC_1,
 118                         JZ4740_CODEC_1_SW1_ENABLE_OFFSET, 1, 0),
 119         SOC_DAPM_SINGLE("DAC Switch", JZ4740_REG_CODEC_1,
 120                         JZ4740_CODEC_1_SW2_ENABLE_OFFSET, 1, 0),
 121 };
 122
 123 static const struct snd_kcontrol_new jz4740_codec_input_controls[] = {
 124         SOC_DAPM_SINGLE("Line Capture Switch", JZ4740_REG_CODEC_1,
 125                         JZ4740_CODEC_1_LINE_ENABLE_OFFSET, 1, 0),
 126         SOC_DAPM_SINGLE("Mic Capture Switch", JZ4740_REG_CODEC_1,
 127                         JZ4740_CODEC_1_MIC_ENABLE_OFFSET, 1, 0),
 128 };
 129
 130 static const struct snd_soc_dapm_widget jz4740_codec_dapm_widgets[] = {
 131         SND_SOC_DAPM_ADC("ADC", "Capture", JZ4740_REG_CODEC_1,
 132                         JZ4740_CODEC_1_ADC_ENABLE_OFFSET, 0),
 133         SND_SOC_DAPM_DAC("DAC", "Playback", JZ4740_REG_CODEC_1,
 134                         JZ4740_CODEC_1_DAC_ENABLE_OFFSET, 0),
 135
 136         SND_SOC_DAPM_MIXER("Output Mixer", JZ4740_REG_CODEC_1,
 137                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET, 1,
 138                         jz4740_codec_output_controls,
 139                         ARRAY_SIZE(jz4740_codec_output_controls)),
 140
 141         SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
 142                         jz4740_codec_input_controls,
 143                         ARRAY_SIZE(jz4740_codec_input_controls)),
 144         SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
 145
 146         SND_SOC_DAPM_OUTPUT("LOUT"),
 147         SND_SOC_DAPM_OUTPUT("ROUT"),
 148
 149         SND_SOC_DAPM_INPUT("MIC"),
 150         SND_SOC_DAPM_INPUT("LIN"),
 151         SND_SOC_DAPM_INPUT("RIN"),
 152 };
 153
 154 static const struct snd_soc_dapm_route jz4740_codec_dapm_routes[] = {
 155         {"Line Input", NULL, "LIN"},
 156         {"Line Input", NULL, "RIN"},
 157
 158         {"Input Mixer", "Line Capture Switch", "Line Input"},
 159         {"Input Mixer", "Mic Capture Switch", "MIC"},
 160
 161         {"ADC", NULL, "Input Mixer"},
 162
 163         {"Output Mixer", "Bypass Switch", "Input Mixer"},
 164         {"Output Mixer", "DAC Switch", "DAC"},
 165
 166         {"LOUT", NULL, "Output Mixer"},
 167         {"ROUT", NULL, "Output Mixer"},
 168 };
 169
 170 static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
 171         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 172 {
 173         uint32_t val;
 174         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 175         struct snd_soc_device *socdev = rtd->socdev;
 176         struct snd_soc_codec *codec = socdev->card->codec;
 177
 178         switch (params_rate(params)) {
 179         case 8000:
 180                 val = 0;
 181                 break;
 182         case 11025:
 183                 val = 1;
 184                 break;
 185         case 12000:
 186                 val = 2;
 187                 break;
 188         case 16000:
 189                 val = 3;
 190                 break;
 191         case 22050:
 192                 val = 4;
 193                 break;
 194         case 24000:
 195                 val = 5;
 196                 break;
 197         case 32000:
 198                 val = 6;
 199                 break;
 200         case 44100:
 201                 val = 7;
 202                 break;
 203         case 48000:
 204                 val = 8;
 205                 break;
 206         default:
 207                 return -EINVAL;
 208         }
 209
 210         val <<= JZ4740_CODEC_2_SAMPLE_RATE_OFFSET;
 211
 212         snd_soc_update_bits(codec, JZ4740_REG_CODEC_2,
 213                                 JZ4740_CODEC_2_SAMPLE_RATE_MASK, val);
 214
 215         return 0;
 216 }
 217
 218 static struct snd_soc_dai_ops jz4740_codec_dai_ops = {
 219         .hw_params = jz4740_codec_hw_params,
 220 };
 221
 222 struct snd_soc_dai jz4740_codec_dai = {
 223         .name = "jz4740",
 224         .playback = {
 225                 .stream_name = "Playback",
 226                 .channels_min = 2,
 227                 .channels_max = 2,
 228                 .rates = SNDRV_PCM_RATE_8000_48000,
 229                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 230         },
 231         .capture = {
 232                 .stream_name = "Capture",
 233                 .channels_min = 2,
 234                 .channels_max = 2,
 235                 .rates = SNDRV_PCM_RATE_8000_48000,
 236                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 237         },
 238         .ops = &jz4740_codec_dai_ops,
 239         .symmetric_rates = 1,
 240 };
 241 EXPORT_SYMBOL_GPL(jz4740_codec_dai);
 242
 243 static void jz4740_codec_wakeup(struct snd_soc_codec *codec)
 244 {
 245         int i;
 246         uint32_t *cache = codec->reg_cache;
 247
 248         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
 249                 JZ4740_CODEC_1_RESET, JZ4740_CODEC_1_RESET);
 250         udelay(2);
 251
 252         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
 253                 JZ4740_CODEC_1_SUSPEND | JZ4740_CODEC_1_RESET, 0);
 254
 255         for (i = 0; i < ARRAY_SIZE(jz4740_codec_regs); ++i)
 256                 jz4740_codec_write(codec, i, cache[i]);
 257 }
 258
 259 static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
 260         enum snd_soc_bias_level level)
 261 {
 262         unsigned int mask;
 263         unsigned int value;
 264
 265         switch (level) {
 266         case SND_SOC_BIAS_ON:
 267                 break;
 268         case SND_SOC_BIAS_PREPARE:
 269                 mask = JZ4740_CODEC_1_VREF_DISABLE |
 270                                 JZ4740_CODEC_1_VREF_AMP_DISABLE |
 271                                 JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 272                 value = 0;
 273
 274                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
 275                 break;
 276         case SND_SOC_BIAS_STANDBY:
 277                 /* The only way to clear the suspend flag is to reset the codec */
 278                 if (codec->bias_level == SND_SOC_BIAS_OFF)
 279                         jz4740_codec_wakeup(codec);
 280
 281                 mask = JZ4740_CODEC_1_VREF_DISABLE |
 282                         JZ4740_CODEC_1_VREF_AMP_DISABLE |
 283                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 284                 value = JZ4740_CODEC_1_VREF_DISABLE |
 285                         JZ4740_CODEC_1_VREF_AMP_DISABLE |
 286                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 287
 288                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
 289                 break;
 290         case SND_SOC_BIAS_OFF:
 291                 mask = JZ4740_CODEC_1_SUSPEND;
 292                 value = JZ4740_CODEC_1_SUSPEND;
 293
 294                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
 295                 break;
 296         default:
 297                 break;
 298         }
 299
 300         codec->bias_level = level;
 301
 302         return 0;
 303 }
 304
 305 static struct snd_soc_codec *jz4740_codec_codec;
 306
 307 static int jz4740_codec_dev_probe(struct platform_device *pdev)
 308 {
 309         int ret;
 310         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 311         struct snd_soc_codec *codec = jz4740_codec_codec;
 312
 313         BUG_ON(!codec);
 314
 315         socdev->card->codec = codec;
 316
 317         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 318         if (ret) {
 319                 dev_err(&pdev->dev, "Failed to create pcms: %d\n", ret);
 320                 return ret;
 321         }
 322
 323         snd_soc_add_controls(codec, jz4740_codec_controls,
 324                 ARRAY_SIZE(jz4740_codec_controls));
 325
 326         snd_soc_dapm_new_controls(codec, jz4740_codec_dapm_widgets,
 327                 ARRAY_SIZE(jz4740_codec_dapm_widgets));
 328
 329         snd_soc_dapm_add_routes(codec, jz4740_codec_dapm_routes,
 330                 ARRAY_SIZE(jz4740_codec_dapm_routes));
 331
 332         snd_soc_dapm_new_widgets(codec);
 333
 334         return 0;
 335 }
 336
 337 static int jz4740_codec_dev_remove(struct platform_device *pdev)
 338 {
 339         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 340
 341         snd_soc_free_pcms(socdev);
 342         snd_soc_dapm_free(socdev);
 343
 344         return 0;
 345 }
 346
 347 #ifdef CONFIG_PM_SLEEP
 348
 349 static int jz4740_codec_suspend(struct platform_device *pdev, pm_message_t state)
 350 {
 351         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 352         struct snd_soc_codec *codec = socdev->card->codec;
 353
 354         return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_OFF);
 355 }
 356
 357 static int jz4740_codec_resume(struct platform_device *pdev)
 358 {
 359         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 360         struct snd_soc_codec *codec = socdev->card->codec;
 361
 362         return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 363 }
 364
 365 #else
 366 #define jz4740_codec_suspend NULL
 367 #define jz4740_codec_resume NULL
 368 #endif
 369
 370 struct snd_soc_codec_device soc_codec_dev_jz4740_codec = {
 371         .probe = jz4740_codec_dev_probe,
 372         .remove = jz4740_codec_dev_remove,
 373         .suspend = jz4740_codec_suspend,
 374         .resume = jz4740_codec_resume,
 375 };
 376 EXPORT_SYMBOL_GPL(soc_codec_dev_jz4740_codec);
 377
 378 static int __devinit jz4740_codec_probe(struct platform_device *pdev)
 379 {
 380         int ret;
 381         struct jz4740_codec *jz4740_codec;
 382         struct snd_soc_codec *codec;
 383         struct resource *mem;
 384
 385         jz4740_codec = kzalloc(sizeof(*jz4740_codec), GFP_KERNEL);
 386         if (!jz4740_codec)
 387                 return -ENOMEM;
 388
 389         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 390         if (!mem) {
 391                 dev_err(&pdev->dev, "Failed to get mmio memory resource\n");
 392                 ret = -ENOENT;
 393                 goto err_free_codec;
 394         }
 395
 396         mem = request_mem_region(mem->start, resource_size(mem), pdev->name);
 397         if (!mem) {
 398                 dev_err(&pdev->dev, "Failed to request mmio memory region\n");
 399                 ret = -EBUSY;
 400                 goto err_free_codec;
 401         }
 402
 403         jz4740_codec->base = ioremap(mem->start, resource_size(mem));
 404         if (!jz4740_codec->base) {
 405                 dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
 406                 ret = -EBUSY;
 407                 goto err_release_mem_region;
 408         }
 409         jz4740_codec->mem = mem;
 410
 411         jz4740_codec_dai.dev = &pdev->dev;
 412
 413         codec = &jz4740_codec->codec;
 414
 415         codec->dev              = &pdev->dev;
 416         codec->name             = "jz4740";
 417         codec->owner            = THIS_MODULE;
 418
 419         codec->read             = jz4740_codec_read;
 420         codec->write            = jz4740_codec_write;
 421         codec->set_bias_level   = jz4740_codec_set_bias_level;
 422         codec->bias_level       = SND_SOC_BIAS_OFF;
 423
 424         codec->dai              = &jz4740_codec_dai;
 425         codec->num_dai          = 1;
 426
 427         codec->reg_cache        = jz4740_codec->reg_cache;
 428         codec->reg_cache_size   = 2;
 429         memcpy(codec->reg_cache, jz4740_codec_regs, sizeof(jz4740_codec_regs));
 430
 431         mutex_init(&codec->mutex);
 432         INIT_LIST_HEAD(&codec->dapm_widgets);
 433         INIT_LIST_HEAD(&codec->dapm_paths);
 434
 435         jz4740_codec_codec = codec;
 436
 437         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
 438                         JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);
 439
 440         platform_set_drvdata(pdev, jz4740_codec);
 441
 442         ret = snd_soc_register_codec(codec);
 443         if (ret) {
 444                 dev_err(&pdev->dev, "Failed to register codec\n");
 445                 goto err_iounmap;
 446         }
 447
 448         ret = snd_soc_register_dai(&jz4740_codec_dai);
 449         if (ret) {
 450                 dev_err(&pdev->dev, "Failed to register codec dai\n");
 451                 goto err_unregister_codec;
 452         }
 453
 454         jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 455
 456         return 0;
 457
 458 err_unregister_codec:
 459         snd_soc_unregister_codec(codec);
 460 err_iounmap:
 461         iounmap(jz4740_codec->base);
 462 err_release_mem_region:
 463         release_mem_region(mem->start, resource_size(mem));
 464 err_free_codec:
 465         kfree(jz4740_codec);
 466
 467         return ret;
 468 }
 469
 470 static int __devexit jz4740_codec_remove(struct platform_device *pdev)
 471 {
 472         struct jz4740_codec *jz4740_codec = platform_get_drvdata(pdev);
 473         struct resource *mem = jz4740_codec->mem;
 474
 475         snd_soc_unregister_dai(&jz4740_codec_dai);
 476         snd_soc_unregister_codec(&jz4740_codec->codec);
 477
 478         iounmap(jz4740_codec->base);
 479         release_mem_region(mem->start, resource_size(mem));
 480
 481         platform_set_drvdata(pdev, NULL);
 482         kfree(jz4740_codec);
 483
 484         return 0;
 485 }
 486
 487 static struct platform_driver jz4740_codec_driver = {
 488         .probe = jz4740_codec_probe,
 489         .remove = __devexit_p(jz4740_codec_remove),
 490         .driver = {
 491                 .name = "jz4740-codec",
 492                 .owner = THIS_MODULE,
 493         },
 494 };
 495
 496 static int __init jz4740_codec_init(void)
 497 {
 498         return platform_driver_register(&jz4740_codec_driver);
 499 }
 500 module_init(jz4740_codec_init);
 501
 502 static void __exit jz4740_codec_exit(void)
 503 {
 504         platform_driver_unregister(&jz4740_codec_driver);
 505 }
 506 module_exit(jz4740_codec_exit);
 507
 508 MODULE_DESCRIPTION("JZ4740 SoC internal codec driver");
 509 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 510 MODULE_LICENSE("GPL v2");
 511 MODULE_ALIAS("platform:jz4740-codec");