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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 | /* * wm8523.c -- WM8523 ALSA SoC Audio driver * * Copyright 2009 Wolfson Microelectronics plc * * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/soc-dapm.h> #include <sound/initval.h> #include <sound/tlv.h> #include "wm8523.h" static struct snd_soc_codec *wm8523_codec; struct snd_soc_codec_device soc_codec_dev_wm8523; #define WM8523_NUM_SUPPLIES 2 static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = { "AVDD", "LINEVDD", }; #define WM8523_NUM_RATES 7 /* codec private data */ struct wm8523_priv { struct snd_soc_codec codec; u16 reg_cache[WM8523_REGISTER_COUNT]; struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES]; unsigned int sysclk; unsigned int rate_constraint_list[WM8523_NUM_RATES]; struct snd_pcm_hw_constraint_list rate_constraint; }; static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = { 0x8523, /* R0 - DEVICE_ID */ 0x0001, /* R1 - REVISION */ 0x0000, /* R2 - PSCTRL1 */ 0x1812, /* R3 - AIF_CTRL1 */ 0x0000, /* R4 - AIF_CTRL2 */ 0x0001, /* R5 - DAC_CTRL3 */ 0x0190, /* R6 - DAC_GAINL */ 0x0190, /* R7 - DAC_GAINR */ 0x0000, /* R8 - ZERO_DETECT */ }; static int wm8523_volatile_register(unsigned int reg) { switch (reg) { case WM8523_DEVICE_ID: case WM8523_REVISION: return 1; default: return 0; } } static int wm8523_reset(struct snd_soc_codec *codec) { return snd_soc_write(codec, WM8523_DEVICE_ID, 0); } static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0); static const char *wm8523_zd_count_text[] = { "1024", "2048", }; static const struct soc_enum wm8523_zc_count = SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text); static const struct snd_kcontrol_new wm8523_snd_controls[] = { SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR, 0, 448, 0, dac_tlv), SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0), SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0), SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1), SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0), SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0), SOC_ENUM("Zero Detect Count", wm8523_zc_count), }; static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = { SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_OUTPUT("LINEVOUTL"), SND_SOC_DAPM_OUTPUT("LINEVOUTR"), }; static const struct snd_soc_dapm_route intercon[] = { { "LINEVOUTL", NULL, "DAC" }, { "LINEVOUTR", NULL, "DAC" }, }; static int wm8523_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets, ARRAY_SIZE(wm8523_dapm_widgets)); snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); return 0; } static struct { int value; int ratio; } lrclk_ratios[WM8523_NUM_RATES] = { { 1, 128 }, { 2, 192 }, { 3, 256 }, { 4, 384 }, { 5, 512 }, { 6, 768 }, { 7, 1152 }, }; static int wm8523_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); /* The set of sample rates that can be supported depends on the * MCLK supplied to the CODEC - enforce this. */ if (!wm8523->sysclk) { dev_err(codec->dev, "No MCLK configured, call set_sysclk() on init\n"); return -EINVAL; } return 0; snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &wm8523->rate_constraint); return 0; } static int wm8523_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); int i; u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2); /* Find a supported LRCLK ratio */ for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { if (wm8523->sysclk / params_rate(params) == lrclk_ratios[i].ratio) break; } /* Should never happen, should be handled by constraints */ if (i == ARRAY_SIZE(lrclk_ratios)) { dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", wm8523->sysclk / params_rate(params)); return -EINVAL; } aifctrl2 &= ~WM8523_SR_MASK; aifctrl2 |= lrclk_ratios[i].value; aifctrl1 &= ~WM8523_WL_MASK; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: aifctrl1 |= 0x8; break; case SNDRV_PCM_FORMAT_S24_LE: aifctrl1 |= 0x10; break; case SNDRV_PCM_FORMAT_S32_LE: aifctrl1 |= 0x18; break; } snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2); return 0; } static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = codec_dai->codec; struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); unsigned int val; int i; wm8523->sysclk = freq; wm8523->rate_constraint.count = 0; for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { val = freq / lrclk_ratios[i].ratio; /* Check that it's a standard rate since core can't * cope with others and having the odd rates confuses * constraint matching. */ switch (val) { case 8000: case 11025: case 16000: case 22050: case 32000: case 44100: case 48000: case 64000: case 88200: case 96000: case 176400: case 192000: dev_dbg(codec->dev, "Supported sample rate: %dHz\n", val); wm8523->rate_constraint_list[i] = val; wm8523->rate_constraint.count++; break; default: dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", val); } } /* Need at least one supported rate... */ if (wm8523->rate_constraint.count == 0) return -EINVAL; return 0; } static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK | WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK); switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: aifctrl1 |= WM8523_AIF_MSTR; break; case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: aifctrl1 |= 0x0002; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: aifctrl1 |= 0x0001; break; case SND_SOC_DAIFMT_DSP_A: aifctrl1 |= 0x0003; break; case SND_SOC_DAIFMT_DSP_B: aifctrl1 |= 0x0023; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_IF: aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV; break; case SND_SOC_DAIFMT_IB_NF: aifctrl1 |= WM8523_BCLK_INV; break; case SND_SOC_DAIFMT_NB_IF: aifctrl1 |= WM8523_LRCLK_INV; break; default: return -EINVAL; } snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); return 0; } static int wm8523_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); int ret, i; switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: /* Full power on */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 3); break; case SND_SOC_BIAS_STANDBY: if (codec->bias_level == SND_SOC_BIAS_OFF) { ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); return ret; } /* Initial power up */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 1); /* Sync back default/cached values */ for (i = WM8523_AIF_CTRL1; i < WM8523_MAX_REGISTER; i++) snd_soc_write(codec, i, wm8523->reg_cache[i]); msleep(100); } /* Power up to mute */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 2); break; case SND_SOC_BIAS_OFF: /* The chip runs through the power down sequence for us. */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 0); msleep(100); regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); break; } codec->bias_level = level; return 0; } #define WM8523_RATES SNDRV_PCM_RATE_8000_192000 #define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) static struct snd_soc_dai_ops wm8523_dai_ops = { .startup = wm8523_startup, .hw_params = wm8523_hw_params, .set_sysclk = wm8523_set_dai_sysclk, .set_fmt = wm8523_set_dai_fmt, }; struct snd_soc_dai wm8523_dai = { .name = "WM8523", .playback = { .stream_name = "Playback", .channels_min = 2, /* Mono modes not yet supported */ .channels_max = 2, .rates = WM8523_RATES, .formats = WM8523_FORMATS, }, .ops = &wm8523_dai_ops, }; EXPORT_SYMBOL_GPL(wm8523_dai); #ifdef CONFIG_PM static int wm8523_suspend(struct platform_device *pdev, pm_message_t state) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8523_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); return 0; } #else #define wm8523_suspend NULL #define wm8523_resume NULL #endif static int wm8523_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec; int ret = 0; if (wm8523_codec == NULL) { dev_err(&pdev->dev, "Codec device not registered\n"); return -ENODEV; } socdev->card->codec = wm8523_codec; codec = wm8523_codec; /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { dev_err(codec->dev, "failed to create pcms: %d\n", ret); goto pcm_err; } snd_soc_add_controls(codec, wm8523_snd_controls, ARRAY_SIZE(wm8523_snd_controls)); wm8523_add_widgets(codec); return ret; pcm_err: return ret; } static int wm8523_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); return 0; } struct snd_soc_codec_device soc_codec_dev_wm8523 = { .probe = wm8523_probe, .remove = wm8523_remove, .suspend = wm8523_suspend, .resume = wm8523_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8523); static int wm8523_register(struct wm8523_priv *wm8523, enum snd_soc_control_type control) { int ret; struct snd_soc_codec *codec = &wm8523->codec; int i; if (wm8523_codec) { dev_err(codec->dev, "Another WM8523 is registered\n"); return -EINVAL; } mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); snd_soc_codec_set_drvdata(codec, wm8523); codec->name = "WM8523"; codec->owner = THIS_MODULE; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = wm8523_set_bias_level; codec->dai = &wm8523_dai; codec->num_dai = 1; codec->reg_cache_size = WM8523_REGISTER_COUNT; codec->reg_cache = &wm8523->reg_cache; codec->volatile_register = wm8523_volatile_register; wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0]; wm8523->rate_constraint.count = ARRAY_SIZE(wm8523->rate_constraint_list); memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg)); ret = snd_soc_codec_set_cache_io(codec, 8, 16, control); if (ret != 0) { dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); goto err; } for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++) wm8523->supplies[i].supply = wm8523_supply_names[i]; ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies), wm8523->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to request supplies: %d\n", ret); goto err; } ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); goto err_get; } ret = snd_soc_read(codec, WM8523_DEVICE_ID); if (ret < 0) { dev_err(codec->dev, "Failed to read ID register\n"); goto err_enable; } if (ret != wm8523_reg[WM8523_DEVICE_ID]) { dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret); ret = -EINVAL; goto err_enable; } ret = snd_soc_read(codec, WM8523_REVISION); if (ret < 0) { dev_err(codec->dev, "Failed to read revision register\n"); goto err_enable; } dev_info(codec->dev, "revision %c\n", (ret & WM8523_CHIP_REV_MASK) + 'A'); ret = wm8523_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset\n"); goto err_enable; } wm8523_dai.dev = codec->dev; /* Change some default settings - latch VU and enable ZC */ wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU; wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC; wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); /* Bias level configuration will have done an extra enable */ regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); wm8523_codec = codec; ret = snd_soc_register_codec(codec); if (ret != 0) { dev_err(codec->dev, "Failed to register codec: %d\n", ret); return ret; } ret = snd_soc_register_dai(&wm8523_dai); if (ret != 0) { dev_err(codec->dev, "Failed to register DAI: %d\n", ret); snd_soc_unregister_codec(codec); return ret; } return 0; err_enable: regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); err_get: regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); err: kfree(wm8523); return ret; } static void wm8523_unregister(struct wm8523_priv *wm8523) { wm8523_set_bias_level(&wm8523->codec, SND_SOC_BIAS_OFF); regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); snd_soc_unregister_dai(&wm8523_dai); snd_soc_unregister_codec(&wm8523->codec); kfree(wm8523); wm8523_codec = NULL; } #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) static __devinit int wm8523_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8523_priv *wm8523; struct snd_soc_codec *codec; wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL); if (wm8523 == NULL) return -ENOMEM; codec = &wm8523->codec; codec->hw_write = (hw_write_t)i2c_master_send; i2c_set_clientdata(i2c, wm8523); codec->control_data = i2c; codec->dev = &i2c->dev; return wm8523_register(wm8523, SND_SOC_I2C); } static __devexit int wm8523_i2c_remove(struct i2c_client *client) { struct wm8523_priv *wm8523 = i2c_get_clientdata(client); wm8523_unregister(wm8523); return 0; } static const struct i2c_device_id wm8523_i2c_id[] = { { "wm8523", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id); static struct i2c_driver wm8523_i2c_driver = { .driver = { .name = "WM8523", .owner = THIS_MODULE, }, .probe = wm8523_i2c_probe, .remove = __devexit_p(wm8523_i2c_remove), .id_table = wm8523_i2c_id, }; #endif static int __init wm8523_modinit(void) { int ret; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) ret = i2c_add_driver(&wm8523_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n", ret); } #endif return 0; } module_init(wm8523_modinit); static void __exit wm8523_exit(void) { #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) i2c_del_driver(&wm8523_i2c_driver); #endif } module_exit(wm8523_exit); MODULE_DESCRIPTION("ASoC WM8523 driver"); MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); MODULE_LICENSE("GPL"); |