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.h>
  26
  27 #define JZ4740_REG_CODEC_1 0x0
  28 #define JZ4740_REG_CODEC_2 0x1
  29
  30 #define JZ4740_CODEC_1_LINE_ENABLE BIT(29)
  31 #define JZ4740_CODEC_1_MIC_ENABLE BIT(28)
  32 #define JZ4740_CODEC_1_SW1_ENABLE BIT(27)
  33 #define JZ4740_CODEC_1_ADC_ENABLE BIT(26)
  34 #define JZ4740_CODEC_1_SW2_ENABLE BIT(25)
  35 #define JZ4740_CODEC_1_DAC_ENABLE BIT(24)
  36 #define JZ4740_CODEC_1_VREF_DISABLE BIT(20)
  37 #define JZ4740_CODEC_1_VREF_AMP_DISABLE BIT(19)
  38 #define JZ4740_CODEC_1_VREF_PULLDOWN BIT(18)
  39 #define JZ4740_CODEC_1_VREF_LOW_CURRENT BIT(17)
  40 #define JZ4740_CODEC_1_VREF_HIGH_CURRENT BIT(16)
  41 #define JZ4740_CODEC_1_HEADPHONE_DISABLE BIT(14)
  42 #define JZ4740_CODEC_1_HEADPHONE_AMP_CHANGE_ANY BIT(13)
  43 #define JZ4740_CODEC_1_HEADPHONE_CHARGE BIT(12)
  44 #define JZ4740_CODEC_1_HEADPHONE_PULLDOWN (BIT(11) | BIT(10))
  45 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M BIT(9)
  46 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN BIT(8)
  47 #define JZ4740_CODEC_1_SUSPEND BIT(1)
  48 #define JZ4740_CODEC_1_RESET BIT(0)
  49
  50 #define JZ4740_CODEC_1_LINE_ENABLE_OFFSET 29
  51 #define JZ4740_CODEC_1_MIC_ENABLE_OFFSET 28
  52 #define JZ4740_CODEC_1_SW1_ENABLE_OFFSET 27
  53 #define JZ4740_CODEC_1_ADC_ENABLE_OFFSET 26
  54 #define JZ4740_CODEC_1_SW2_ENABLE_OFFSET 25
  55 #define JZ4740_CODEC_1_DAC_ENABLE_OFFSET 24
  56 #define JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET 14
  57 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET 8
  58
  59 #define JZ4740_CODEC_2_INPUT_VOLUME_MASK                0x1f0000
  60 #define JZ4740_CODEC_2_SAMPLE_RATE_MASK                 0x000f00
  61 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_MASK              0x000030
  62 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_MASK    0x000003
  63
  64 #define JZ4740_CODEC_2_INPUT_VOLUME_OFFSET              16
  65 #define JZ4740_CODEC_2_SAMPLE_RATE_OFFSET                8
  66 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET     4
  67 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET   0
  68
  69 static const uint32_t jz4740_codec_regs[] = {
  70         0x021b2302, 0x00170803,
  71 };
  72
  73 struct jz4740_codec {
  74         void __iomem *base;
  75         struct resource *mem;
  76 };
  77
  78 static unsigned int jz4740_codec_read(struct snd_soc_codec *codec,
  79         unsigned int reg)
  80 {
  81         struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
  82         return readl(jz4740_codec->base + (reg << 2));
  83 }
  84
  85 static int jz4740_codec_write(struct snd_soc_codec *codec, unsigned int reg,
  86         unsigned int val)
  87 {
  88         struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
  89         u32 *cache = codec->reg_cache;
  90
  91         cache[reg] = val;
  92         writel(val, jz4740_codec->base + (reg << 2));
  93
  94         return 0;
  95 }
  96
  97 static const struct snd_kcontrol_new jz4740_codec_controls[] = {
  98         SOC_SINGLE("Master Playback Volume", JZ4740_REG_CODEC_2,
  99                         JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET, 3, 0),
 100         SOC_SINGLE("Master Capture Volume", JZ4740_REG_CODEC_2,
 101                         JZ4740_CODEC_2_INPUT_VOLUME_OFFSET, 31, 0),
 102         SOC_SINGLE("Master Playback Switch", JZ4740_REG_CODEC_1,
 103                         JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET, 1, 1),
 104         SOC_SINGLE("Mic Capture Volume", JZ4740_REG_CODEC_2,
 105                         JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET, 3, 0),
 106 };
 107
 108 static const struct snd_kcontrol_new jz4740_codec_output_controls[] = {
 109         SOC_DAPM_SINGLE("Bypass Switch", JZ4740_REG_CODEC_1,
 110                         JZ4740_CODEC_1_SW1_ENABLE_OFFSET, 1, 0),
 111         SOC_DAPM_SINGLE("DAC Switch", JZ4740_REG_CODEC_1,
 112                         JZ4740_CODEC_1_SW2_ENABLE_OFFSET, 1, 0),
 113 };
 114
 115 static const struct snd_kcontrol_new jz4740_codec_input_controls[] = {
 116         SOC_DAPM_SINGLE("Line Capture Switch", JZ4740_REG_CODEC_1,
 117                         JZ4740_CODEC_1_LINE_ENABLE_OFFSET, 1, 0),
 118         SOC_DAPM_SINGLE("Mic Capture Switch", JZ4740_REG_CODEC_1,
 119                         JZ4740_CODEC_1_MIC_ENABLE_OFFSET, 1, 0),
 120 };
 121
 122 static const struct snd_soc_dapm_widget jz4740_codec_dapm_widgets[] = {
 123         SND_SOC_DAPM_ADC("ADC", "Capture", JZ4740_REG_CODEC_1,
 124                         JZ4740_CODEC_1_ADC_ENABLE_OFFSET, 0),
 125         SND_SOC_DAPM_DAC("DAC", "Playback", JZ4740_REG_CODEC_1,
 126                         JZ4740_CODEC_1_DAC_ENABLE_OFFSET, 0),
 127
 128         SND_SOC_DAPM_MIXER("Output Mixer", JZ4740_REG_CODEC_1,
 129                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET, 1,
 130                         jz4740_codec_output_controls,
 131                         ARRAY_SIZE(jz4740_codec_output_controls)),
 132
 133         SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
 134                         jz4740_codec_input_controls,
 135                         ARRAY_SIZE(jz4740_codec_input_controls)),
 136         SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
 137
 138         SND_SOC_DAPM_OUTPUT("LOUT"),
 139         SND_SOC_DAPM_OUTPUT("ROUT"),
 140
 141         SND_SOC_DAPM_INPUT("MIC"),
 142         SND_SOC_DAPM_INPUT("LIN"),
 143         SND_SOC_DAPM_INPUT("RIN"),
 144 };
 145
 146 static const struct snd_soc_dapm_route jz4740_codec_dapm_routes[] = {
 147         {"Line Input", NULL, "LIN"},
 148         {"Line Input", NULL, "RIN"},
 149
 150         {"Input Mixer", "Line Capture Switch", "Line Input"},
 151         {"Input Mixer", "Mic Capture Switch", "MIC"},
 152
 153         {"ADC", NULL, "Input Mixer"},
 154
 155         {"Output Mixer", "Bypass Switch", "Input Mixer"},
 156         {"Output Mixer", "DAC Switch", "DAC"},
 157
 158         {"LOUT", NULL, "Output Mixer"},
 159         {"ROUT", NULL, "Output Mixer"},
 160 };
 161
 162 static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
 163         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 164 {
 165         uint32_t val;
 166         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 167         struct snd_soc_codec *codec =rtd->codec;
 168
 169         switch (params_rate(params)) {
 170         case 8000:
 171                 val = 0;
 172                 break;
 173         case 11025:
 174                 val = 1;
 175                 break;
 176         case 12000:
 177                 val = 2;
 178                 break;
 179         case 16000:
 180                 val = 3;
 181                 break;
 182         case 22050:
 183                 val = 4;
 184                 break;
 185         case 24000:
 186                 val = 5;
 187                 break;
 188         case 32000:
 189                 val = 6;
 190                 break;
 191         case 44100:
 192                 val = 7;
 193                 break;
 194         case 48000:
 195                 val = 8;
 196                 break;
 197         default:
 198                 return -EINVAL;
 199         }
 200
 201         val <<= JZ4740_CODEC_2_SAMPLE_RATE_OFFSET;
 202
 203         snd_soc_update_bits(codec, JZ4740_REG_CODEC_2,
 204                                 JZ4740_CODEC_2_SAMPLE_RATE_MASK, val);
 205
 206         return 0;
 207 }
 208
 209 static struct snd_soc_dai_ops jz4740_codec_dai_ops = {
 210         .hw_params = jz4740_codec_hw_params,
 211 };
 212
 213 static struct snd_soc_dai_driver jz4740_codec_dai = {
 214         .name = "jz4740-hifi",
 215         .playback = {
 216                 .stream_name = "Playback",
 217                 .channels_min = 2,
 218                 .channels_max = 2,
 219                 .rates = SNDRV_PCM_RATE_8000_48000,
 220                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 221         },
 222         .capture = {
 223                 .stream_name = "Capture",
 224                 .channels_min = 2,
 225                 .channels_max = 2,
 226                 .rates = SNDRV_PCM_RATE_8000_48000,
 227                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 228         },
 229         .ops = &jz4740_codec_dai_ops,
 230         .symmetric_rates = 1,
 231 };
 232
 233 static void jz4740_codec_wakeup(struct snd_soc_codec *codec)
 234 {
 235         int i;
 236         uint32_t *cache = codec->reg_cache;
 237
 238         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
 239                 JZ4740_CODEC_1_RESET, JZ4740_CODEC_1_RESET);
 240         udelay(2);
 241
 242         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
 243                 JZ4740_CODEC_1_SUSPEND | JZ4740_CODEC_1_RESET, 0);
 244
 245         for (i = 0; i < ARRAY_SIZE(jz4740_codec_regs); ++i)
 246                 jz4740_codec_write(codec, i, cache[i]);
 247 }
 248
 249 static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
 250         enum snd_soc_bias_level level)
 251 {
 252         unsigned int mask;
 253         unsigned int value;
 254
 255         switch (level) {
 256         case SND_SOC_BIAS_ON:
 257                 break;
 258         case SND_SOC_BIAS_PREPARE:
 259                 mask = JZ4740_CODEC_1_VREF_DISABLE |
 260                                 JZ4740_CODEC_1_VREF_AMP_DISABLE |
 261                                 JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 262                 value = 0;
 263
 264                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
 265                 break;
 266         case SND_SOC_BIAS_STANDBY:
 267                 /* The only way to clear the suspend flag is to reset the codec */
 268                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
 269                         jz4740_codec_wakeup(codec);
 270
 271                 mask = JZ4740_CODEC_1_VREF_DISABLE |
 272                         JZ4740_CODEC_1_VREF_AMP_DISABLE |
 273                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 274                 value = JZ4740_CODEC_1_VREF_DISABLE |
 275                         JZ4740_CODEC_1_VREF_AMP_DISABLE |
 276                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
 277
 278                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
 279                 break;
 280         case SND_SOC_BIAS_OFF:
 281                 mask = JZ4740_CODEC_1_SUSPEND;
 282                 value = JZ4740_CODEC_1_SUSPEND;
 283
 284                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
 285                 break;
 286         default:
 287                 break;
 288         }
 289
 290         codec->dapm.bias_level = level;
 291
 292         return 0;
 293 }
 294
 295 static int jz4740_codec_dev_probe(struct snd_soc_codec *codec)
 296 {
 297         struct snd_soc_dapm_context *dapm = &codec->dapm;
 298
 299         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
 300                         JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);
 301
 302         snd_soc_add_controls(codec, jz4740_codec_controls,
 303                 ARRAY_SIZE(jz4740_codec_controls));
 304
 305         snd_soc_dapm_new_controls(dapm, jz4740_codec_dapm_widgets,
 306                 ARRAY_SIZE(jz4740_codec_dapm_widgets));
 307
 308         snd_soc_dapm_add_routes(dapm, jz4740_codec_dapm_routes,
 309                 ARRAY_SIZE(jz4740_codec_dapm_routes));
 310
 311         jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 312
 313         return 0;
 314 }
 315
 316 static int jz4740_codec_dev_remove(struct snd_soc_codec *codec)
 317 {
 318         jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_OFF);
 319
 320         return 0;
 321 }
 322
 323 #ifdef CONFIG_PM_SLEEP
 324
 325 static int jz4740_codec_suspend(struct snd_soc_codec *codec, pm_message_t state)
 326 {
 327         return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_OFF);
 328 }
 329
 330 static int jz4740_codec_resume(struct snd_soc_codec *codec)
 331 {
 332         return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 333 }
 334
 335 #else
 336 #define jz4740_codec_suspend NULL
 337 #define jz4740_codec_resume NULL
 338 #endif
 339
 340 static struct snd_soc_codec_driver soc_codec_dev_jz4740_codec = {
 341         .probe = jz4740_codec_dev_probe,
 342         .remove = jz4740_codec_dev_remove,
 343         .suspend = jz4740_codec_suspend,
 344         .resume = jz4740_codec_resume,
 345         .read = jz4740_codec_read,
 346         .write = jz4740_codec_write,
 347         .set_bias_level = jz4740_codec_set_bias_level,
 348         .reg_cache_default      = jz4740_codec_regs,
 349         .reg_word_size = sizeof(u32),
 350         .reg_cache_size = 2,
 351 };
 352
 353 static int __devinit jz4740_codec_probe(struct platform_device *pdev)
 354 {
 355         int ret;
 356         struct jz4740_codec *jz4740_codec;
 357         struct resource *mem;
 358
 359         jz4740_codec = kzalloc(sizeof(*jz4740_codec), GFP_KERNEL);
 360         if (!jz4740_codec)
 361                 return -ENOMEM;
 362
 363         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 364         if (!mem) {
 365                 dev_err(&pdev->dev, "Failed to get mmio memory resource\n");
 366                 ret = -ENOENT;
 367                 goto err_free_codec;
 368         }
 369
 370         mem = request_mem_region(mem->start, resource_size(mem), pdev->name);
 371         if (!mem) {
 372                 dev_err(&pdev->dev, "Failed to request mmio memory region\n");
 373                 ret = -EBUSY;
 374                 goto err_free_codec;
 375         }
 376
 377         jz4740_codec->base = ioremap(mem->start, resource_size(mem));
 378         if (!jz4740_codec->base) {
 379                 dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
 380                 ret = -EBUSY;
 381                 goto err_release_mem_region;
 382         }
 383         jz4740_codec->mem = mem;
 384
 385         platform_set_drvdata(pdev, jz4740_codec);
 386
 387         ret = snd_soc_register_codec(&pdev->dev,
 388                         &soc_codec_dev_jz4740_codec, &jz4740_codec_dai, 1);
 389         if (ret) {
 390                 dev_err(&pdev->dev, "Failed to register codec\n");
 391                 goto err_iounmap;
 392         }
 393
 394         return 0;
 395
 396 err_iounmap:
 397         iounmap(jz4740_codec->base);
 398 err_release_mem_region:
 399         release_mem_region(mem->start, resource_size(mem));
 400 err_free_codec:
 401         kfree(jz4740_codec);
 402
 403         return ret;
 404 }
 405
 406 static int __devexit jz4740_codec_remove(struct platform_device *pdev)
 407 {
 408         struct jz4740_codec *jz4740_codec = platform_get_drvdata(pdev);
 409         struct resource *mem = jz4740_codec->mem;
 410
 411         snd_soc_unregister_codec(&pdev->dev);
 412
 413         iounmap(jz4740_codec->base);
 414         release_mem_region(mem->start, resource_size(mem));
 415
 416         platform_set_drvdata(pdev, NULL);
 417         kfree(jz4740_codec);
 418
 419         return 0;
 420 }
 421
 422 static struct platform_driver jz4740_codec_driver = {
 423         .probe = jz4740_codec_probe,
 424         .remove = __devexit_p(jz4740_codec_remove),
 425         .driver = {
 426                 .name = "jz4740-codec",
 427                 .owner = THIS_MODULE,
 428         },
 429 };
 430
 431 static int __init jz4740_codec_init(void)
 432 {
 433         return platform_driver_register(&jz4740_codec_driver);
 434 }
 435 module_init(jz4740_codec_init);
 436
 437 static void __exit jz4740_codec_exit(void)
 438 {
 439         platform_driver_unregister(&jz4740_codec_driver);
 440 }
 441 module_exit(jz4740_codec_exit);
 442
 443 MODULE_DESCRIPTION("JZ4740 SoC internal codec driver");
 444 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 445 MODULE_LICENSE("GPL v2");
 446 MODULE_ALIAS("platform:jz4740-codec");