1 /* 2 * soc-core.c -- ALSA SoC Audio Layer 3 * 4 * Copyright 2005 Wolfson Microelectronics PLC. 5 * Copyright 2005 Openedhand Ltd. 6 * Copyright (C) 2010 Slimlogic Ltd. 7 * Copyright (C) 2010 Texas Instruments Inc. 8 * 9 * Author: Liam Girdwood <lrg@slimlogic.co.uk> 10 * with code, comments and ideas from :- 11 * Richard Purdie <richard@openedhand.com> 12 * 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License as published by the 15 * Free Software Foundation; either version 2 of the License, or (at your 16 * option) any later version. 17 * 18 * TODO: 19 * o Add hw rules to enforce rates, etc. 20 * o More testing with other codecs/machines. 21 * o Add more codecs and platforms to ensure good API coverage. 22 * o Support TDM on PCM and I2S 23 */ 24 25 #include <linux/module.h> 26 #include <linux/moduleparam.h> 27 #include <linux/init.h> 28 #include <linux/delay.h> 29 #include <linux/pm.h> 30 #include <linux/bitops.h> 31 #include <linux/debugfs.h> 32 #include <linux/platform_device.h> 33 #include <linux/pinctrl/consumer.h> 34 #include <linux/ctype.h> 35 #include <linux/slab.h> 36 #include <linux/of.h> 37 #include <sound/core.h> 38 #include <sound/jack.h> 39 #include <sound/pcm.h> 40 #include <sound/pcm_params.h> 41 #include <sound/soc.h> 42 #include <sound/soc-dpcm.h> 43 #include <sound/initval.h> 44 45 #define CREATE_TRACE_POINTS 46 #include <trace/events/asoc.h> 47 48 #define NAME_SIZE 32 49 50 #ifdef CONFIG_DEBUG_FS 51 struct dentry *snd_soc_debugfs_root; 52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root); 53 #endif 54 55 static DEFINE_MUTEX(client_mutex); 56 static LIST_HEAD(platform_list); 57 static LIST_HEAD(codec_list); 58 static LIST_HEAD(component_list); 59 60 /* 61 * This is a timeout to do a DAPM powerdown after a stream is closed(). 62 * It can be used to eliminate pops between different playback streams, e.g. 63 * between two audio tracks. 64 */ 65 static int pmdown_time = 5000; 66 module_param(pmdown_time, int, 0); 67 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)"); 68 69 /* returns the minimum number of bytes needed to represent 70 * a particular given value */ 71 static int min_bytes_needed(unsigned long val) 72 { 73 int c = 0; 74 int i; 75 76 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c) 77 if (val & (1UL << i)) 78 break; 79 c = (sizeof val * 8) - c; 80 if (!c || (c % 8)) 81 c = (c + 8) / 8; 82 else 83 c /= 8; 84 return c; 85 } 86 87 /* fill buf which is 'len' bytes with a formatted 88 * string of the form 'reg: value\n' */ 89 static int format_register_str(struct snd_soc_codec *codec, 90 unsigned int reg, char *buf, size_t len) 91 { 92 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; 93 int regsize = codec->driver->reg_word_size * 2; 94 int ret; 95 char tmpbuf[len + 1]; 96 char regbuf[regsize + 1]; 97 98 /* since tmpbuf is allocated on the stack, warn the callers if they 99 * try to abuse this function */ 100 WARN_ON(len > 63); 101 102 /* +2 for ': ' and + 1 for '\n' */ 103 if (wordsize + regsize + 2 + 1 != len) 104 return -EINVAL; 105 106 ret = snd_soc_read(codec, reg); 107 if (ret < 0) { 108 memset(regbuf, 'X', regsize); 109 regbuf[regsize] = '\0'; 110 } else { 111 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret); 112 } 113 114 /* prepare the buffer */ 115 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf); 116 /* copy it back to the caller without the '\0' */ 117 memcpy(buf, tmpbuf, len); 118 119 return 0; 120 } 121 122 /* codec register dump */ 123 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf, 124 size_t count, loff_t pos) 125 { 126 int i, step = 1; 127 int wordsize, regsize; 128 int len; 129 size_t total = 0; 130 loff_t p = 0; 131 132 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; 133 regsize = codec->driver->reg_word_size * 2; 134 135 len = wordsize + regsize + 2 + 1; 136 137 if (!codec->driver->reg_cache_size) 138 return 0; 139 140 if (codec->driver->reg_cache_step) 141 step = codec->driver->reg_cache_step; 142 143 for (i = 0; i < codec->driver->reg_cache_size; i += step) { 144 /* only support larger than PAGE_SIZE bytes debugfs 145 * entries for the default case */ 146 if (p >= pos) { 147 if (total + len >= count - 1) 148 break; 149 format_register_str(codec, i, buf + total, len); 150 total += len; 151 } 152 p += len; 153 } 154 155 total = min(total, count - 1); 156 157 return total; 158 } 159 160 static ssize_t codec_reg_show(struct device *dev, 161 struct device_attribute *attr, char *buf) 162 { 163 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 164 165 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0); 166 } 167 168 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL); 169 170 static ssize_t pmdown_time_show(struct device *dev, 171 struct device_attribute *attr, char *buf) 172 { 173 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 174 175 return sprintf(buf, "%ld\n", rtd->pmdown_time); 176 } 177 178 static ssize_t pmdown_time_set(struct device *dev, 179 struct device_attribute *attr, 180 const char *buf, size_t count) 181 { 182 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 183 int ret; 184 185 ret = kstrtol(buf, 10, &rtd->pmdown_time); 186 if (ret) 187 return ret; 188 189 return count; 190 } 191 192 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set); 193 194 #ifdef CONFIG_DEBUG_FS 195 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf, 196 size_t count, loff_t *ppos) 197 { 198 ssize_t ret; 199 struct snd_soc_codec *codec = file->private_data; 200 char *buf; 201 202 if (*ppos < 0 || !count) 203 return -EINVAL; 204 205 buf = kmalloc(count, GFP_KERNEL); 206 if (!buf) 207 return -ENOMEM; 208 209 ret = soc_codec_reg_show(codec, buf, count, *ppos); 210 if (ret >= 0) { 211 if (copy_to_user(user_buf, buf, ret)) { 212 kfree(buf); 213 return -EFAULT; 214 } 215 *ppos += ret; 216 } 217 218 kfree(buf); 219 return ret; 220 } 221 222 static ssize_t codec_reg_write_file(struct file *file, 223 const char __user *user_buf, size_t count, loff_t *ppos) 224 { 225 char buf[32]; 226 size_t buf_size; 227 char *start = buf; 228 unsigned long reg, value; 229 struct snd_soc_codec *codec = file->private_data; 230 int ret; 231 232 buf_size = min(count, (sizeof(buf)-1)); 233 if (copy_from_user(buf, user_buf, buf_size)) 234 return -EFAULT; 235 buf[buf_size] = 0; 236 237 while (*start == ' ') 238 start++; 239 reg = simple_strtoul(start, &start, 16); 240 while (*start == ' ') 241 start++; 242 ret = kstrtoul(start, 16, &value); 243 if (ret) 244 return ret; 245 246 /* Userspace has been fiddling around behind the kernel's back */ 247 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE); 248 249 snd_soc_write(codec, reg, value); 250 return buf_size; 251 } 252 253 static const struct file_operations codec_reg_fops = { 254 .open = simple_open, 255 .read = codec_reg_read_file, 256 .write = codec_reg_write_file, 257 .llseek = default_llseek, 258 }; 259 260 static void soc_init_component_debugfs(struct snd_soc_component *component) 261 { 262 if (component->debugfs_prefix) { 263 char *name; 264 265 name = kasprintf(GFP_KERNEL, "%s:%s", 266 component->debugfs_prefix, component->name); 267 if (name) { 268 component->debugfs_root = debugfs_create_dir(name, 269 component->card->debugfs_card_root); 270 kfree(name); 271 } 272 } else { 273 component->debugfs_root = debugfs_create_dir(component->name, 274 component->card->debugfs_card_root); 275 } 276 277 if (!component->debugfs_root) { 278 dev_warn(component->dev, 279 "ASoC: Failed to create component debugfs directory\n"); 280 return; 281 } 282 283 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component), 284 component->debugfs_root); 285 286 if (component->init_debugfs) 287 component->init_debugfs(component); 288 } 289 290 static void soc_cleanup_component_debugfs(struct snd_soc_component *component) 291 { 292 debugfs_remove_recursive(component->debugfs_root); 293 } 294 295 static void soc_init_codec_debugfs(struct snd_soc_component *component) 296 { 297 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 298 299 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, 300 codec->component.debugfs_root, 301 codec, &codec_reg_fops); 302 if (!codec->debugfs_reg) 303 dev_warn(codec->dev, 304 "ASoC: Failed to create codec register debugfs file\n"); 305 } 306 307 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf, 308 size_t count, loff_t *ppos) 309 { 310 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 311 ssize_t len, ret = 0; 312 struct snd_soc_codec *codec; 313 314 if (!buf) 315 return -ENOMEM; 316 317 list_for_each_entry(codec, &codec_list, list) { 318 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 319 codec->component.name); 320 if (len >= 0) 321 ret += len; 322 if (ret > PAGE_SIZE) { 323 ret = PAGE_SIZE; 324 break; 325 } 326 } 327 328 if (ret >= 0) 329 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 330 331 kfree(buf); 332 333 return ret; 334 } 335 336 static const struct file_operations codec_list_fops = { 337 .read = codec_list_read_file, 338 .llseek = default_llseek,/* read accesses f_pos */ 339 }; 340 341 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf, 342 size_t count, loff_t *ppos) 343 { 344 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 345 ssize_t len, ret = 0; 346 struct snd_soc_component *component; 347 struct snd_soc_dai *dai; 348 349 if (!buf) 350 return -ENOMEM; 351 352 list_for_each_entry(component, &component_list, list) { 353 list_for_each_entry(dai, &component->dai_list, list) { 354 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 355 dai->name); 356 if (len >= 0) 357 ret += len; 358 if (ret > PAGE_SIZE) { 359 ret = PAGE_SIZE; 360 break; 361 } 362 } 363 } 364 365 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 366 367 kfree(buf); 368 369 return ret; 370 } 371 372 static const struct file_operations dai_list_fops = { 373 .read = dai_list_read_file, 374 .llseek = default_llseek,/* read accesses f_pos */ 375 }; 376 377 static ssize_t platform_list_read_file(struct file *file, 378 char __user *user_buf, 379 size_t count, loff_t *ppos) 380 { 381 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 382 ssize_t len, ret = 0; 383 struct snd_soc_platform *platform; 384 385 if (!buf) 386 return -ENOMEM; 387 388 list_for_each_entry(platform, &platform_list, list) { 389 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 390 platform->component.name); 391 if (len >= 0) 392 ret += len; 393 if (ret > PAGE_SIZE) { 394 ret = PAGE_SIZE; 395 break; 396 } 397 } 398 399 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 400 401 kfree(buf); 402 403 return ret; 404 } 405 406 static const struct file_operations platform_list_fops = { 407 .read = platform_list_read_file, 408 .llseek = default_llseek,/* read accesses f_pos */ 409 }; 410 411 static void soc_init_card_debugfs(struct snd_soc_card *card) 412 { 413 card->debugfs_card_root = debugfs_create_dir(card->name, 414 snd_soc_debugfs_root); 415 if (!card->debugfs_card_root) { 416 dev_warn(card->dev, 417 "ASoC: Failed to create card debugfs directory\n"); 418 return; 419 } 420 421 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644, 422 card->debugfs_card_root, 423 &card->pop_time); 424 if (!card->debugfs_pop_time) 425 dev_warn(card->dev, 426 "ASoC: Failed to create pop time debugfs file\n"); 427 } 428 429 static void soc_cleanup_card_debugfs(struct snd_soc_card *card) 430 { 431 debugfs_remove_recursive(card->debugfs_card_root); 432 } 433 434 #else 435 436 #define soc_init_codec_debugfs NULL 437 438 static inline void soc_init_component_debugfs( 439 struct snd_soc_component *component) 440 { 441 } 442 443 static inline void soc_cleanup_component_debugfs( 444 struct snd_soc_component *component) 445 { 446 } 447 448 static inline void soc_init_card_debugfs(struct snd_soc_card *card) 449 { 450 } 451 452 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) 453 { 454 } 455 #endif 456 457 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card, 458 const char *dai_link, int stream) 459 { 460 int i; 461 462 for (i = 0; i < card->num_links; i++) { 463 if (card->rtd[i].dai_link->no_pcm && 464 !strcmp(card->rtd[i].dai_link->name, dai_link)) 465 return card->rtd[i].pcm->streams[stream].substream; 466 } 467 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link); 468 return NULL; 469 } 470 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream); 471 472 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card, 473 const char *dai_link) 474 { 475 int i; 476 477 for (i = 0; i < card->num_links; i++) { 478 if (!strcmp(card->rtd[i].dai_link->name, dai_link)) 479 return &card->rtd[i]; 480 } 481 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link); 482 return NULL; 483 } 484 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime); 485 486 static void codec2codec_close_delayed_work(struct work_struct *work) 487 { 488 /* Currently nothing to do for c2c links 489 * Since c2c links are internal nodes in the DAPM graph and 490 * don't interface with the outside world or application layer 491 * we don't have to do any special handling on close. 492 */ 493 } 494 495 #ifdef CONFIG_PM_SLEEP 496 /* powers down audio subsystem for suspend */ 497 int snd_soc_suspend(struct device *dev) 498 { 499 struct snd_soc_card *card = dev_get_drvdata(dev); 500 struct snd_soc_codec *codec; 501 int i, j; 502 503 /* If the card is not initialized yet there is nothing to do */ 504 if (!card->instantiated) 505 return 0; 506 507 /* Due to the resume being scheduled into a workqueue we could 508 * suspend before that's finished - wait for it to complete. 509 */ 510 snd_power_lock(card->snd_card); 511 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0); 512 snd_power_unlock(card->snd_card); 513 514 /* we're going to block userspace touching us until resume completes */ 515 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot); 516 517 /* mute any active DACs */ 518 for (i = 0; i < card->num_rtd; i++) { 519 520 if (card->rtd[i].dai_link->ignore_suspend) 521 continue; 522 523 for (j = 0; j < card->rtd[i].num_codecs; j++) { 524 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 525 struct snd_soc_dai_driver *drv = dai->driver; 526 527 if (drv->ops->digital_mute && dai->playback_active) 528 drv->ops->digital_mute(dai, 1); 529 } 530 } 531 532 /* suspend all pcms */ 533 for (i = 0; i < card->num_rtd; i++) { 534 if (card->rtd[i].dai_link->ignore_suspend) 535 continue; 536 537 snd_pcm_suspend_all(card->rtd[i].pcm); 538 } 539 540 if (card->suspend_pre) 541 card->suspend_pre(card); 542 543 for (i = 0; i < card->num_rtd; i++) { 544 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 545 546 if (card->rtd[i].dai_link->ignore_suspend) 547 continue; 548 549 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control) 550 cpu_dai->driver->suspend(cpu_dai); 551 } 552 553 /* close any waiting streams and save state */ 554 for (i = 0; i < card->num_rtd; i++) { 555 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais; 556 flush_delayed_work(&card->rtd[i].delayed_work); 557 for (j = 0; j < card->rtd[i].num_codecs; j++) { 558 codec_dais[j]->codec->dapm.suspend_bias_level = 559 codec_dais[j]->codec->dapm.bias_level; 560 } 561 } 562 563 for (i = 0; i < card->num_rtd; i++) { 564 565 if (card->rtd[i].dai_link->ignore_suspend) 566 continue; 567 568 snd_soc_dapm_stream_event(&card->rtd[i], 569 SNDRV_PCM_STREAM_PLAYBACK, 570 SND_SOC_DAPM_STREAM_SUSPEND); 571 572 snd_soc_dapm_stream_event(&card->rtd[i], 573 SNDRV_PCM_STREAM_CAPTURE, 574 SND_SOC_DAPM_STREAM_SUSPEND); 575 } 576 577 /* Recheck all endpoints too, their state is affected by suspend */ 578 dapm_mark_endpoints_dirty(card); 579 snd_soc_dapm_sync(&card->dapm); 580 581 /* suspend all CODECs */ 582 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 583 /* If there are paths active then the CODEC will be held with 584 * bias _ON and should not be suspended. */ 585 if (!codec->suspended) { 586 switch (codec->dapm.bias_level) { 587 case SND_SOC_BIAS_STANDBY: 588 /* 589 * If the CODEC is capable of idle 590 * bias off then being in STANDBY 591 * means it's doing something, 592 * otherwise fall through. 593 */ 594 if (codec->dapm.idle_bias_off) { 595 dev_dbg(codec->dev, 596 "ASoC: idle_bias_off CODEC on over suspend\n"); 597 break; 598 } 599 600 case SND_SOC_BIAS_OFF: 601 if (codec->driver->suspend) 602 codec->driver->suspend(codec); 603 codec->suspended = 1; 604 if (codec->component.regmap) 605 regcache_mark_dirty(codec->component.regmap); 606 /* deactivate pins to sleep state */ 607 pinctrl_pm_select_sleep_state(codec->dev); 608 break; 609 default: 610 dev_dbg(codec->dev, 611 "ASoC: CODEC is on over suspend\n"); 612 break; 613 } 614 } 615 } 616 617 for (i = 0; i < card->num_rtd; i++) { 618 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 619 620 if (card->rtd[i].dai_link->ignore_suspend) 621 continue; 622 623 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control) 624 cpu_dai->driver->suspend(cpu_dai); 625 626 /* deactivate pins to sleep state */ 627 pinctrl_pm_select_sleep_state(cpu_dai->dev); 628 } 629 630 if (card->suspend_post) 631 card->suspend_post(card); 632 633 return 0; 634 } 635 EXPORT_SYMBOL_GPL(snd_soc_suspend); 636 637 /* deferred resume work, so resume can complete before we finished 638 * setting our codec back up, which can be very slow on I2C 639 */ 640 static void soc_resume_deferred(struct work_struct *work) 641 { 642 struct snd_soc_card *card = 643 container_of(work, struct snd_soc_card, deferred_resume_work); 644 struct snd_soc_codec *codec; 645 int i, j; 646 647 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time, 648 * so userspace apps are blocked from touching us 649 */ 650 651 dev_dbg(card->dev, "ASoC: starting resume work\n"); 652 653 /* Bring us up into D2 so that DAPM starts enabling things */ 654 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2); 655 656 if (card->resume_pre) 657 card->resume_pre(card); 658 659 /* resume control bus DAIs */ 660 for (i = 0; i < card->num_rtd; i++) { 661 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 662 663 if (card->rtd[i].dai_link->ignore_suspend) 664 continue; 665 666 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control) 667 cpu_dai->driver->resume(cpu_dai); 668 } 669 670 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 671 /* If the CODEC was idle over suspend then it will have been 672 * left with bias OFF or STANDBY and suspended so we must now 673 * resume. Otherwise the suspend was suppressed. 674 */ 675 if (codec->suspended) { 676 switch (codec->dapm.bias_level) { 677 case SND_SOC_BIAS_STANDBY: 678 case SND_SOC_BIAS_OFF: 679 if (codec->driver->resume) 680 codec->driver->resume(codec); 681 codec->suspended = 0; 682 break; 683 default: 684 dev_dbg(codec->dev, 685 "ASoC: CODEC was on over suspend\n"); 686 break; 687 } 688 } 689 } 690 691 for (i = 0; i < card->num_rtd; i++) { 692 693 if (card->rtd[i].dai_link->ignore_suspend) 694 continue; 695 696 snd_soc_dapm_stream_event(&card->rtd[i], 697 SNDRV_PCM_STREAM_PLAYBACK, 698 SND_SOC_DAPM_STREAM_RESUME); 699 700 snd_soc_dapm_stream_event(&card->rtd[i], 701 SNDRV_PCM_STREAM_CAPTURE, 702 SND_SOC_DAPM_STREAM_RESUME); 703 } 704 705 /* unmute any active DACs */ 706 for (i = 0; i < card->num_rtd; i++) { 707 708 if (card->rtd[i].dai_link->ignore_suspend) 709 continue; 710 711 for (j = 0; j < card->rtd[i].num_codecs; j++) { 712 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 713 struct snd_soc_dai_driver *drv = dai->driver; 714 715 if (drv->ops->digital_mute && dai->playback_active) 716 drv->ops->digital_mute(dai, 0); 717 } 718 } 719 720 for (i = 0; i < card->num_rtd; i++) { 721 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 722 723 if (card->rtd[i].dai_link->ignore_suspend) 724 continue; 725 726 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control) 727 cpu_dai->driver->resume(cpu_dai); 728 } 729 730 if (card->resume_post) 731 card->resume_post(card); 732 733 dev_dbg(card->dev, "ASoC: resume work completed\n"); 734 735 /* userspace can access us now we are back as we were before */ 736 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0); 737 738 /* Recheck all endpoints too, their state is affected by suspend */ 739 dapm_mark_endpoints_dirty(card); 740 snd_soc_dapm_sync(&card->dapm); 741 } 742 743 /* powers up audio subsystem after a suspend */ 744 int snd_soc_resume(struct device *dev) 745 { 746 struct snd_soc_card *card = dev_get_drvdata(dev); 747 bool bus_control = false; 748 int i; 749 750 /* If the card is not initialized yet there is nothing to do */ 751 if (!card->instantiated) 752 return 0; 753 754 /* activate pins from sleep state */ 755 for (i = 0; i < card->num_rtd; i++) { 756 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 757 struct snd_soc_dai **codec_dais = rtd->codec_dais; 758 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 759 int j; 760 761 if (cpu_dai->active) 762 pinctrl_pm_select_default_state(cpu_dai->dev); 763 764 for (j = 0; j < rtd->num_codecs; j++) { 765 struct snd_soc_dai *codec_dai = codec_dais[j]; 766 if (codec_dai->active) 767 pinctrl_pm_select_default_state(codec_dai->dev); 768 } 769 } 770 771 /* 772 * DAIs that also act as the control bus master might have other drivers 773 * hanging off them so need to resume immediately. Other drivers don't 774 * have that problem and may take a substantial amount of time to resume 775 * due to I/O costs and anti-pop so handle them out of line. 776 */ 777 for (i = 0; i < card->num_rtd; i++) { 778 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 779 bus_control |= cpu_dai->driver->bus_control; 780 } 781 if (bus_control) { 782 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n"); 783 soc_resume_deferred(&card->deferred_resume_work); 784 } else { 785 dev_dbg(dev, "ASoC: Scheduling resume work\n"); 786 if (!schedule_work(&card->deferred_resume_work)) 787 dev_err(dev, "ASoC: resume work item may be lost\n"); 788 } 789 790 return 0; 791 } 792 EXPORT_SYMBOL_GPL(snd_soc_resume); 793 #else 794 #define snd_soc_suspend NULL 795 #define snd_soc_resume NULL 796 #endif 797 798 static const struct snd_soc_dai_ops null_dai_ops = { 799 }; 800 801 static struct snd_soc_component *soc_find_component( 802 const struct device_node *of_node, const char *name) 803 { 804 struct snd_soc_component *component; 805 806 list_for_each_entry(component, &component_list, list) { 807 if (of_node) { 808 if (component->dev->of_node == of_node) 809 return component; 810 } else if (strcmp(component->name, name) == 0) { 811 return component; 812 } 813 } 814 815 return NULL; 816 } 817 818 static struct snd_soc_dai *snd_soc_find_dai( 819 const struct snd_soc_dai_link_component *dlc) 820 { 821 struct snd_soc_component *component; 822 struct snd_soc_dai *dai; 823 824 /* Find CPU DAI from registered DAIs*/ 825 list_for_each_entry(component, &component_list, list) { 826 if (dlc->of_node && component->dev->of_node != dlc->of_node) 827 continue; 828 if (dlc->name && strcmp(component->name, dlc->name)) 829 continue; 830 list_for_each_entry(dai, &component->dai_list, list) { 831 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)) 832 continue; 833 834 return dai; 835 } 836 } 837 838 return NULL; 839 } 840 841 static int soc_bind_dai_link(struct snd_soc_card *card, int num) 842 { 843 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 844 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 845 struct snd_soc_dai_link_component *codecs = dai_link->codecs; 846 struct snd_soc_dai_link_component cpu_dai_component; 847 struct snd_soc_dai **codec_dais = rtd->codec_dais; 848 struct snd_soc_platform *platform; 849 const char *platform_name; 850 int i; 851 852 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num); 853 854 cpu_dai_component.name = dai_link->cpu_name; 855 cpu_dai_component.of_node = dai_link->cpu_of_node; 856 cpu_dai_component.dai_name = dai_link->cpu_dai_name; 857 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component); 858 if (!rtd->cpu_dai) { 859 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n", 860 dai_link->cpu_dai_name); 861 return -EPROBE_DEFER; 862 } 863 864 rtd->num_codecs = dai_link->num_codecs; 865 866 /* Find CODEC from registered CODECs */ 867 for (i = 0; i < rtd->num_codecs; i++) { 868 codec_dais[i] = snd_soc_find_dai(&codecs[i]); 869 if (!codec_dais[i]) { 870 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n", 871 codecs[i].dai_name); 872 return -EPROBE_DEFER; 873 } 874 } 875 876 /* Single codec links expect codec and codec_dai in runtime data */ 877 rtd->codec_dai = codec_dais[0]; 878 rtd->codec = rtd->codec_dai->codec; 879 880 /* if there's no platform we match on the empty platform */ 881 platform_name = dai_link->platform_name; 882 if (!platform_name && !dai_link->platform_of_node) 883 platform_name = "snd-soc-dummy"; 884 885 /* find one from the set of registered platforms */ 886 list_for_each_entry(platform, &platform_list, list) { 887 if (dai_link->platform_of_node) { 888 if (platform->dev->of_node != 889 dai_link->platform_of_node) 890 continue; 891 } else { 892 if (strcmp(platform->component.name, platform_name)) 893 continue; 894 } 895 896 rtd->platform = platform; 897 } 898 if (!rtd->platform) { 899 dev_err(card->dev, "ASoC: platform %s not registered\n", 900 dai_link->platform_name); 901 return -EPROBE_DEFER; 902 } 903 904 card->num_rtd++; 905 906 return 0; 907 } 908 909 static void soc_remove_component(struct snd_soc_component *component) 910 { 911 if (!component->probed) 912 return; 913 914 /* This is a HACK and will be removed soon */ 915 if (component->codec) 916 list_del(&component->codec->card_list); 917 918 if (component->remove) 919 component->remove(component); 920 921 snd_soc_dapm_free(snd_soc_component_get_dapm(component)); 922 923 soc_cleanup_component_debugfs(component); 924 component->probed = 0; 925 module_put(component->dev->driver->owner); 926 } 927 928 static void soc_remove_dai(struct snd_soc_dai *dai, int order) 929 { 930 int err; 931 932 if (dai && dai->probed && 933 dai->driver->remove_order == order) { 934 if (dai->driver->remove) { 935 err = dai->driver->remove(dai); 936 if (err < 0) 937 dev_err(dai->dev, 938 "ASoC: failed to remove %s: %d\n", 939 dai->name, err); 940 } 941 dai->probed = 0; 942 } 943 } 944 945 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order) 946 { 947 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 948 int i; 949 950 /* unregister the rtd device */ 951 if (rtd->dev_registered) { 952 device_remove_file(rtd->dev, &dev_attr_pmdown_time); 953 device_remove_file(rtd->dev, &dev_attr_codec_reg); 954 device_unregister(rtd->dev); 955 rtd->dev_registered = 0; 956 } 957 958 /* remove the CODEC DAI */ 959 for (i = 0; i < rtd->num_codecs; i++) 960 soc_remove_dai(rtd->codec_dais[i], order); 961 962 soc_remove_dai(rtd->cpu_dai, order); 963 } 964 965 static void soc_remove_link_components(struct snd_soc_card *card, int num, 966 int order) 967 { 968 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 969 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 970 struct snd_soc_platform *platform = rtd->platform; 971 struct snd_soc_component *component; 972 int i; 973 974 /* remove the platform */ 975 if (platform && platform->component.driver->remove_order == order) 976 soc_remove_component(&platform->component); 977 978 /* remove the CODEC-side CODEC */ 979 for (i = 0; i < rtd->num_codecs; i++) { 980 component = rtd->codec_dais[i]->component; 981 if (component->driver->remove_order == order) 982 soc_remove_component(component); 983 } 984 985 /* remove any CPU-side CODEC */ 986 if (cpu_dai) { 987 if (cpu_dai->component->driver->remove_order == order) 988 soc_remove_component(cpu_dai->component); 989 } 990 } 991 992 static void soc_remove_dai_links(struct snd_soc_card *card) 993 { 994 int dai, order; 995 996 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 997 order++) { 998 for (dai = 0; dai < card->num_rtd; dai++) 999 soc_remove_link_dais(card, dai, order); 1000 } 1001 1002 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1003 order++) { 1004 for (dai = 0; dai < card->num_rtd; dai++) 1005 soc_remove_link_components(card, dai, order); 1006 } 1007 1008 card->num_rtd = 0; 1009 } 1010 1011 static void soc_set_name_prefix(struct snd_soc_card *card, 1012 struct snd_soc_component *component) 1013 { 1014 int i; 1015 1016 if (card->codec_conf == NULL) 1017 return; 1018 1019 for (i = 0; i < card->num_configs; i++) { 1020 struct snd_soc_codec_conf *map = &card->codec_conf[i]; 1021 if (map->of_node && component->dev->of_node != map->of_node) 1022 continue; 1023 if (map->dev_name && strcmp(component->name, map->dev_name)) 1024 continue; 1025 component->name_prefix = map->name_prefix; 1026 break; 1027 } 1028 } 1029 1030 static int soc_probe_component(struct snd_soc_card *card, 1031 struct snd_soc_component *component) 1032 { 1033 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); 1034 struct snd_soc_dai *dai; 1035 int ret; 1036 1037 if (component->probed) 1038 return 0; 1039 1040 component->card = card; 1041 dapm->card = card; 1042 soc_set_name_prefix(card, component); 1043 1044 if (!try_module_get(component->dev->driver->owner)) 1045 return -ENODEV; 1046 1047 soc_init_component_debugfs(component); 1048 1049 if (component->dapm_widgets) { 1050 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets, 1051 component->num_dapm_widgets); 1052 1053 if (ret != 0) { 1054 dev_err(component->dev, 1055 "Failed to create new controls %d\n", ret); 1056 goto err_probe; 1057 } 1058 } 1059 1060 list_for_each_entry(dai, &component->dai_list, list) { 1061 ret = snd_soc_dapm_new_dai_widgets(dapm, dai); 1062 if (ret != 0) { 1063 dev_err(component->dev, 1064 "Failed to create DAI widgets %d\n", ret); 1065 goto err_probe; 1066 } 1067 } 1068 1069 if (component->probe) { 1070 ret = component->probe(component); 1071 if (ret < 0) { 1072 dev_err(component->dev, 1073 "ASoC: failed to probe component %d\n", ret); 1074 goto err_probe; 1075 } 1076 1077 WARN(dapm->idle_bias_off && 1078 dapm->bias_level != SND_SOC_BIAS_OFF, 1079 "codec %s can not start from non-off bias with idle_bias_off==1\n", 1080 component->name); 1081 } 1082 1083 if (component->controls) 1084 snd_soc_add_component_controls(component, component->controls, 1085 component->num_controls); 1086 if (component->dapm_routes) 1087 snd_soc_dapm_add_routes(dapm, component->dapm_routes, 1088 component->num_dapm_routes); 1089 1090 component->probed = 1; 1091 list_add(&dapm->list, &card->dapm_list); 1092 1093 /* This is a HACK and will be removed soon */ 1094 if (component->codec) 1095 list_add(&component->codec->card_list, &card->codec_dev_list); 1096 1097 return 0; 1098 1099 err_probe: 1100 soc_cleanup_component_debugfs(component); 1101 module_put(component->dev->driver->owner); 1102 1103 return ret; 1104 } 1105 1106 static void rtd_release(struct device *dev) 1107 { 1108 kfree(dev); 1109 } 1110 1111 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd, 1112 const char *name) 1113 { 1114 int ret = 0; 1115 1116 /* register the rtd device */ 1117 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL); 1118 if (!rtd->dev) 1119 return -ENOMEM; 1120 device_initialize(rtd->dev); 1121 rtd->dev->parent = rtd->card->dev; 1122 rtd->dev->release = rtd_release; 1123 dev_set_name(rtd->dev, "%s", name); 1124 dev_set_drvdata(rtd->dev, rtd); 1125 mutex_init(&rtd->pcm_mutex); 1126 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients); 1127 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients); 1128 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients); 1129 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients); 1130 ret = device_add(rtd->dev); 1131 if (ret < 0) { 1132 /* calling put_device() here to free the rtd->dev */ 1133 put_device(rtd->dev); 1134 dev_err(rtd->card->dev, 1135 "ASoC: failed to register runtime device: %d\n", ret); 1136 return ret; 1137 } 1138 rtd->dev_registered = 1; 1139 1140 if (rtd->codec) { 1141 /* add DAPM sysfs entries for this codec */ 1142 ret = snd_soc_dapm_sys_add(rtd->dev); 1143 if (ret < 0) 1144 dev_err(rtd->dev, 1145 "ASoC: failed to add codec dapm sysfs entries: %d\n", 1146 ret); 1147 1148 /* add codec sysfs entries */ 1149 ret = device_create_file(rtd->dev, &dev_attr_codec_reg); 1150 if (ret < 0) 1151 dev_err(rtd->dev, 1152 "ASoC: failed to add codec sysfs files: %d\n", 1153 ret); 1154 } 1155 1156 return 0; 1157 } 1158 1159 static int soc_probe_link_components(struct snd_soc_card *card, int num, 1160 int order) 1161 { 1162 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1163 struct snd_soc_platform *platform = rtd->platform; 1164 struct snd_soc_component *component; 1165 int i, ret; 1166 1167 /* probe the CPU-side component, if it is a CODEC */ 1168 component = rtd->cpu_dai->component; 1169 if (component->driver->probe_order == order) { 1170 ret = soc_probe_component(card, component); 1171 if (ret < 0) 1172 return ret; 1173 } 1174 1175 /* probe the CODEC-side components */ 1176 for (i = 0; i < rtd->num_codecs; i++) { 1177 component = rtd->codec_dais[i]->component; 1178 if (component->driver->probe_order == order) { 1179 ret = soc_probe_component(card, component); 1180 if (ret < 0) 1181 return ret; 1182 } 1183 } 1184 1185 /* probe the platform */ 1186 if (platform->component.driver->probe_order == order) { 1187 ret = soc_probe_component(card, &platform->component); 1188 if (ret < 0) 1189 return ret; 1190 } 1191 1192 return 0; 1193 } 1194 1195 static int soc_probe_dai(struct snd_soc_dai *dai, int order) 1196 { 1197 int ret; 1198 1199 if (!dai->probed && dai->driver->probe_order == order) { 1200 if (dai->driver->probe) { 1201 ret = dai->driver->probe(dai); 1202 if (ret < 0) { 1203 dev_err(dai->dev, 1204 "ASoC: failed to probe DAI %s: %d\n", 1205 dai->name, ret); 1206 return ret; 1207 } 1208 } 1209 1210 dai->probed = 1; 1211 } 1212 1213 return 0; 1214 } 1215 1216 static int soc_link_dai_widgets(struct snd_soc_card *card, 1217 struct snd_soc_dai_link *dai_link, 1218 struct snd_soc_pcm_runtime *rtd) 1219 { 1220 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1221 struct snd_soc_dai *codec_dai = rtd->codec_dai; 1222 struct snd_soc_dapm_widget *play_w, *capture_w; 1223 int ret; 1224 1225 if (rtd->num_codecs > 1) 1226 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n"); 1227 1228 /* link the DAI widgets */ 1229 play_w = codec_dai->playback_widget; 1230 capture_w = cpu_dai->capture_widget; 1231 if (play_w && capture_w) { 1232 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1233 capture_w, play_w); 1234 if (ret != 0) { 1235 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1236 play_w->name, capture_w->name, ret); 1237 return ret; 1238 } 1239 } 1240 1241 play_w = cpu_dai->playback_widget; 1242 capture_w = codec_dai->capture_widget; 1243 if (play_w && capture_w) { 1244 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1245 capture_w, play_w); 1246 if (ret != 0) { 1247 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1248 play_w->name, capture_w->name, ret); 1249 return ret; 1250 } 1251 } 1252 1253 return 0; 1254 } 1255 1256 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order) 1257 { 1258 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 1259 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1260 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1261 int i, ret; 1262 1263 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n", 1264 card->name, num, order); 1265 1266 /* set default power off timeout */ 1267 rtd->pmdown_time = pmdown_time; 1268 1269 ret = soc_probe_dai(cpu_dai, order); 1270 if (ret) 1271 return ret; 1272 1273 /* probe the CODEC DAI */ 1274 for (i = 0; i < rtd->num_codecs; i++) { 1275 ret = soc_probe_dai(rtd->codec_dais[i], order); 1276 if (ret) 1277 return ret; 1278 } 1279 1280 /* complete DAI probe during last probe */ 1281 if (order != SND_SOC_COMP_ORDER_LAST) 1282 return 0; 1283 1284 /* do machine specific initialization */ 1285 if (dai_link->init) { 1286 ret = dai_link->init(rtd); 1287 if (ret < 0) { 1288 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1289 dai_link->name, ret); 1290 return ret; 1291 } 1292 } 1293 1294 ret = soc_post_component_init(rtd, dai_link->name); 1295 if (ret) 1296 return ret; 1297 1298 #ifdef CONFIG_DEBUG_FS 1299 /* add DPCM sysfs entries */ 1300 if (dai_link->dynamic) { 1301 ret = soc_dpcm_debugfs_add(rtd); 1302 if (ret < 0) { 1303 dev_err(rtd->dev, 1304 "ASoC: failed to add dpcm sysfs entries: %d\n", 1305 ret); 1306 return ret; 1307 } 1308 } 1309 #endif 1310 1311 ret = device_create_file(rtd->dev, &dev_attr_pmdown_time); 1312 if (ret < 0) 1313 dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n", 1314 ret); 1315 1316 if (cpu_dai->driver->compress_dai) { 1317 /*create compress_device"*/ 1318 ret = soc_new_compress(rtd, num); 1319 if (ret < 0) { 1320 dev_err(card->dev, "ASoC: can't create compress %s\n", 1321 dai_link->stream_name); 1322 return ret; 1323 } 1324 } else { 1325 1326 if (!dai_link->params) { 1327 /* create the pcm */ 1328 ret = soc_new_pcm(rtd, num); 1329 if (ret < 0) { 1330 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n", 1331 dai_link->stream_name, ret); 1332 return ret; 1333 } 1334 } else { 1335 INIT_DELAYED_WORK(&rtd->delayed_work, 1336 codec2codec_close_delayed_work); 1337 1338 /* link the DAI widgets */ 1339 ret = soc_link_dai_widgets(card, dai_link, rtd); 1340 if (ret) 1341 return ret; 1342 } 1343 } 1344 1345 return 0; 1346 } 1347 1348 static int soc_bind_aux_dev(struct snd_soc_card *card, int num) 1349 { 1350 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1351 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1352 const char *name = aux_dev->codec_name; 1353 1354 rtd->component = soc_find_component(aux_dev->codec_of_node, name); 1355 if (!rtd->component) { 1356 if (aux_dev->codec_of_node) 1357 name = of_node_full_name(aux_dev->codec_of_node); 1358 1359 dev_err(card->dev, "ASoC: %s not registered\n", name); 1360 return -EPROBE_DEFER; 1361 } 1362 1363 /* 1364 * Some places still reference rtd->codec, so we have to keep that 1365 * initialized if the component is a CODEC. Once all those references 1366 * have been removed, this code can be removed as well. 1367 */ 1368 rtd->codec = rtd->component->codec; 1369 1370 return 0; 1371 } 1372 1373 static int soc_probe_aux_dev(struct snd_soc_card *card, int num) 1374 { 1375 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1376 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1377 int ret; 1378 1379 ret = soc_probe_component(card, rtd->component); 1380 if (ret < 0) 1381 return ret; 1382 1383 /* do machine specific initialization */ 1384 if (aux_dev->init) { 1385 ret = aux_dev->init(rtd->component); 1386 if (ret < 0) { 1387 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1388 aux_dev->name, ret); 1389 return ret; 1390 } 1391 } 1392 1393 return soc_post_component_init(rtd, aux_dev->name); 1394 } 1395 1396 static void soc_remove_aux_dev(struct snd_soc_card *card, int num) 1397 { 1398 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1399 struct snd_soc_component *component = rtd->component; 1400 1401 /* unregister the rtd device */ 1402 if (rtd->dev_registered) { 1403 device_remove_file(rtd->dev, &dev_attr_codec_reg); 1404 device_unregister(rtd->dev); 1405 rtd->dev_registered = 0; 1406 } 1407 1408 if (component && component->probed) 1409 soc_remove_component(component); 1410 } 1411 1412 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec) 1413 { 1414 int ret; 1415 1416 if (codec->cache_init) 1417 return 0; 1418 1419 ret = snd_soc_cache_init(codec); 1420 if (ret < 0) { 1421 dev_err(codec->dev, 1422 "ASoC: Failed to set cache compression type: %d\n", 1423 ret); 1424 return ret; 1425 } 1426 codec->cache_init = 1; 1427 return 0; 1428 } 1429 1430 static int snd_soc_instantiate_card(struct snd_soc_card *card) 1431 { 1432 struct snd_soc_codec *codec; 1433 struct snd_soc_dai_link *dai_link; 1434 int ret, i, order, dai_fmt; 1435 1436 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT); 1437 1438 /* bind DAIs */ 1439 for (i = 0; i < card->num_links; i++) { 1440 ret = soc_bind_dai_link(card, i); 1441 if (ret != 0) 1442 goto base_error; 1443 } 1444 1445 /* bind aux_devs too */ 1446 for (i = 0; i < card->num_aux_devs; i++) { 1447 ret = soc_bind_aux_dev(card, i); 1448 if (ret != 0) 1449 goto base_error; 1450 } 1451 1452 /* initialize the register cache for each available codec */ 1453 list_for_each_entry(codec, &codec_list, list) { 1454 if (codec->cache_init) 1455 continue; 1456 ret = snd_soc_init_codec_cache(codec); 1457 if (ret < 0) 1458 goto base_error; 1459 } 1460 1461 /* card bind complete so register a sound card */ 1462 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 1463 card->owner, 0, &card->snd_card); 1464 if (ret < 0) { 1465 dev_err(card->dev, 1466 "ASoC: can't create sound card for card %s: %d\n", 1467 card->name, ret); 1468 goto base_error; 1469 } 1470 1471 card->dapm.bias_level = SND_SOC_BIAS_OFF; 1472 card->dapm.dev = card->dev; 1473 card->dapm.card = card; 1474 list_add(&card->dapm.list, &card->dapm_list); 1475 1476 #ifdef CONFIG_DEBUG_FS 1477 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root); 1478 #endif 1479 1480 #ifdef CONFIG_PM_SLEEP 1481 /* deferred resume work */ 1482 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); 1483 #endif 1484 1485 if (card->dapm_widgets) 1486 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, 1487 card->num_dapm_widgets); 1488 1489 /* initialise the sound card only once */ 1490 if (card->probe) { 1491 ret = card->probe(card); 1492 if (ret < 0) 1493 goto card_probe_error; 1494 } 1495 1496 /* probe all components used by DAI links on this card */ 1497 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1498 order++) { 1499 for (i = 0; i < card->num_links; i++) { 1500 ret = soc_probe_link_components(card, i, order); 1501 if (ret < 0) { 1502 dev_err(card->dev, 1503 "ASoC: failed to instantiate card %d\n", 1504 ret); 1505 goto probe_dai_err; 1506 } 1507 } 1508 } 1509 1510 /* probe all DAI links on this card */ 1511 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1512 order++) { 1513 for (i = 0; i < card->num_links; i++) { 1514 ret = soc_probe_link_dais(card, i, order); 1515 if (ret < 0) { 1516 dev_err(card->dev, 1517 "ASoC: failed to instantiate card %d\n", 1518 ret); 1519 goto probe_dai_err; 1520 } 1521 } 1522 } 1523 1524 for (i = 0; i < card->num_aux_devs; i++) { 1525 ret = soc_probe_aux_dev(card, i); 1526 if (ret < 0) { 1527 dev_err(card->dev, 1528 "ASoC: failed to add auxiliary devices %d\n", 1529 ret); 1530 goto probe_aux_dev_err; 1531 } 1532 } 1533 1534 snd_soc_dapm_link_dai_widgets(card); 1535 snd_soc_dapm_connect_dai_link_widgets(card); 1536 1537 if (card->controls) 1538 snd_soc_add_card_controls(card, card->controls, card->num_controls); 1539 1540 if (card->dapm_routes) 1541 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes, 1542 card->num_dapm_routes); 1543 1544 for (i = 0; i < card->num_links; i++) { 1545 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1546 dai_link = &card->dai_link[i]; 1547 dai_fmt = dai_link->dai_fmt; 1548 1549 if (dai_fmt) { 1550 struct snd_soc_dai **codec_dais = rtd->codec_dais; 1551 int j; 1552 1553 for (j = 0; j < rtd->num_codecs; j++) { 1554 struct snd_soc_dai *codec_dai = codec_dais[j]; 1555 1556 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt); 1557 if (ret != 0 && ret != -ENOTSUPP) 1558 dev_warn(codec_dai->dev, 1559 "ASoC: Failed to set DAI format: %d\n", 1560 ret); 1561 } 1562 } 1563 1564 /* If this is a regular CPU link there will be a platform */ 1565 if (dai_fmt && 1566 (dai_link->platform_name || dai_link->platform_of_node)) { 1567 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai, 1568 dai_fmt); 1569 if (ret != 0 && ret != -ENOTSUPP) 1570 dev_warn(card->rtd[i].cpu_dai->dev, 1571 "ASoC: Failed to set DAI format: %d\n", 1572 ret); 1573 } else if (dai_fmt) { 1574 /* Flip the polarity for the "CPU" end */ 1575 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK; 1576 switch (dai_link->dai_fmt & 1577 SND_SOC_DAIFMT_MASTER_MASK) { 1578 case SND_SOC_DAIFMT_CBM_CFM: 1579 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; 1580 break; 1581 case SND_SOC_DAIFMT_CBM_CFS: 1582 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM; 1583 break; 1584 case SND_SOC_DAIFMT_CBS_CFM: 1585 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS; 1586 break; 1587 case SND_SOC_DAIFMT_CBS_CFS: 1588 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM; 1589 break; 1590 } 1591 1592 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai, 1593 dai_fmt); 1594 if (ret != 0 && ret != -ENOTSUPP) 1595 dev_warn(card->rtd[i].cpu_dai->dev, 1596 "ASoC: Failed to set DAI format: %d\n", 1597 ret); 1598 } 1599 } 1600 1601 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname), 1602 "%s", card->name); 1603 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname), 1604 "%s", card->long_name ? card->long_name : card->name); 1605 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver), 1606 "%s", card->driver_name ? card->driver_name : card->name); 1607 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) { 1608 switch (card->snd_card->driver[i]) { 1609 case '_': 1610 case '-': 1611 case '\0': 1612 break; 1613 default: 1614 if (!isalnum(card->snd_card->driver[i])) 1615 card->snd_card->driver[i] = '_'; 1616 break; 1617 } 1618 } 1619 1620 if (card->late_probe) { 1621 ret = card->late_probe(card); 1622 if (ret < 0) { 1623 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n", 1624 card->name, ret); 1625 goto probe_aux_dev_err; 1626 } 1627 } 1628 1629 if (card->fully_routed) 1630 snd_soc_dapm_auto_nc_pins(card); 1631 1632 snd_soc_dapm_new_widgets(card); 1633 1634 ret = snd_card_register(card->snd_card); 1635 if (ret < 0) { 1636 dev_err(card->dev, "ASoC: failed to register soundcard %d\n", 1637 ret); 1638 goto probe_aux_dev_err; 1639 } 1640 1641 card->instantiated = 1; 1642 snd_soc_dapm_sync(&card->dapm); 1643 mutex_unlock(&card->mutex); 1644 1645 return 0; 1646 1647 probe_aux_dev_err: 1648 for (i = 0; i < card->num_aux_devs; i++) 1649 soc_remove_aux_dev(card, i); 1650 1651 probe_dai_err: 1652 soc_remove_dai_links(card); 1653 1654 card_probe_error: 1655 if (card->remove) 1656 card->remove(card); 1657 1658 snd_card_free(card->snd_card); 1659 1660 base_error: 1661 mutex_unlock(&card->mutex); 1662 1663 return ret; 1664 } 1665 1666 /* probes a new socdev */ 1667 static int soc_probe(struct platform_device *pdev) 1668 { 1669 struct snd_soc_card *card = platform_get_drvdata(pdev); 1670 1671 /* 1672 * no card, so machine driver should be registering card 1673 * we should not be here in that case so ret error 1674 */ 1675 if (!card) 1676 return -EINVAL; 1677 1678 dev_warn(&pdev->dev, 1679 "ASoC: machine %s should use snd_soc_register_card()\n", 1680 card->name); 1681 1682 /* Bodge while we unpick instantiation */ 1683 card->dev = &pdev->dev; 1684 1685 return snd_soc_register_card(card); 1686 } 1687 1688 static int soc_cleanup_card_resources(struct snd_soc_card *card) 1689 { 1690 int i; 1691 1692 /* make sure any delayed work runs */ 1693 for (i = 0; i < card->num_rtd; i++) { 1694 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1695 flush_delayed_work(&rtd->delayed_work); 1696 } 1697 1698 /* remove auxiliary devices */ 1699 for (i = 0; i < card->num_aux_devs; i++) 1700 soc_remove_aux_dev(card, i); 1701 1702 /* remove and free each DAI */ 1703 soc_remove_dai_links(card); 1704 1705 soc_cleanup_card_debugfs(card); 1706 1707 /* remove the card */ 1708 if (card->remove) 1709 card->remove(card); 1710 1711 snd_soc_dapm_free(&card->dapm); 1712 1713 snd_card_free(card->snd_card); 1714 return 0; 1715 1716 } 1717 1718 /* removes a socdev */ 1719 static int soc_remove(struct platform_device *pdev) 1720 { 1721 struct snd_soc_card *card = platform_get_drvdata(pdev); 1722 1723 snd_soc_unregister_card(card); 1724 return 0; 1725 } 1726 1727 int snd_soc_poweroff(struct device *dev) 1728 { 1729 struct snd_soc_card *card = dev_get_drvdata(dev); 1730 int i; 1731 1732 if (!card->instantiated) 1733 return 0; 1734 1735 /* Flush out pmdown_time work - we actually do want to run it 1736 * now, we're shutting down so no imminent restart. */ 1737 for (i = 0; i < card->num_rtd; i++) { 1738 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1739 flush_delayed_work(&rtd->delayed_work); 1740 } 1741 1742 snd_soc_dapm_shutdown(card); 1743 1744 /* deactivate pins to sleep state */ 1745 for (i = 0; i < card->num_rtd; i++) { 1746 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1747 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1748 int j; 1749 1750 pinctrl_pm_select_sleep_state(cpu_dai->dev); 1751 for (j = 0; j < rtd->num_codecs; j++) { 1752 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 1753 pinctrl_pm_select_sleep_state(codec_dai->dev); 1754 } 1755 } 1756 1757 return 0; 1758 } 1759 EXPORT_SYMBOL_GPL(snd_soc_poweroff); 1760 1761 const struct dev_pm_ops snd_soc_pm_ops = { 1762 .suspend = snd_soc_suspend, 1763 .resume = snd_soc_resume, 1764 .freeze = snd_soc_suspend, 1765 .thaw = snd_soc_resume, 1766 .poweroff = snd_soc_poweroff, 1767 .restore = snd_soc_resume, 1768 }; 1769 EXPORT_SYMBOL_GPL(snd_soc_pm_ops); 1770 1771 /* ASoC platform driver */ 1772 static struct platform_driver soc_driver = { 1773 .driver = { 1774 .name = "soc-audio", 1775 .pm = &snd_soc_pm_ops, 1776 }, 1777 .probe = soc_probe, 1778 .remove = soc_remove, 1779 }; 1780 1781 /** 1782 * snd_soc_cnew - create new control 1783 * @_template: control template 1784 * @data: control private data 1785 * @long_name: control long name 1786 * @prefix: control name prefix 1787 * 1788 * Create a new mixer control from a template control. 1789 * 1790 * Returns 0 for success, else error. 1791 */ 1792 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, 1793 void *data, const char *long_name, 1794 const char *prefix) 1795 { 1796 struct snd_kcontrol_new template; 1797 struct snd_kcontrol *kcontrol; 1798 char *name = NULL; 1799 1800 memcpy(&template, _template, sizeof(template)); 1801 template.index = 0; 1802 1803 if (!long_name) 1804 long_name = template.name; 1805 1806 if (prefix) { 1807 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name); 1808 if (!name) 1809 return NULL; 1810 1811 template.name = name; 1812 } else { 1813 template.name = long_name; 1814 } 1815 1816 kcontrol = snd_ctl_new1(&template, data); 1817 1818 kfree(name); 1819 1820 return kcontrol; 1821 } 1822 EXPORT_SYMBOL_GPL(snd_soc_cnew); 1823 1824 static int snd_soc_add_controls(struct snd_card *card, struct device *dev, 1825 const struct snd_kcontrol_new *controls, int num_controls, 1826 const char *prefix, void *data) 1827 { 1828 int err, i; 1829 1830 for (i = 0; i < num_controls; i++) { 1831 const struct snd_kcontrol_new *control = &controls[i]; 1832 err = snd_ctl_add(card, snd_soc_cnew(control, data, 1833 control->name, prefix)); 1834 if (err < 0) { 1835 dev_err(dev, "ASoC: Failed to add %s: %d\n", 1836 control->name, err); 1837 return err; 1838 } 1839 } 1840 1841 return 0; 1842 } 1843 1844 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card, 1845 const char *name) 1846 { 1847 struct snd_card *card = soc_card->snd_card; 1848 struct snd_kcontrol *kctl; 1849 1850 if (unlikely(!name)) 1851 return NULL; 1852 1853 list_for_each_entry(kctl, &card->controls, list) 1854 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) 1855 return kctl; 1856 return NULL; 1857 } 1858 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol); 1859 1860 /** 1861 * snd_soc_add_component_controls - Add an array of controls to a component. 1862 * 1863 * @component: Component to add controls to 1864 * @controls: Array of controls to add 1865 * @num_controls: Number of elements in the array 1866 * 1867 * Return: 0 for success, else error. 1868 */ 1869 int snd_soc_add_component_controls(struct snd_soc_component *component, 1870 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1871 { 1872 struct snd_card *card = component->card->snd_card; 1873 1874 return snd_soc_add_controls(card, component->dev, controls, 1875 num_controls, component->name_prefix, component); 1876 } 1877 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls); 1878 1879 /** 1880 * snd_soc_add_codec_controls - add an array of controls to a codec. 1881 * Convenience function to add a list of controls. Many codecs were 1882 * duplicating this code. 1883 * 1884 * @codec: codec to add controls to 1885 * @controls: array of controls to add 1886 * @num_controls: number of elements in the array 1887 * 1888 * Return 0 for success, else error. 1889 */ 1890 int snd_soc_add_codec_controls(struct snd_soc_codec *codec, 1891 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1892 { 1893 return snd_soc_add_component_controls(&codec->component, controls, 1894 num_controls); 1895 } 1896 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls); 1897 1898 /** 1899 * snd_soc_add_platform_controls - add an array of controls to a platform. 1900 * Convenience function to add a list of controls. 1901 * 1902 * @platform: platform to add controls to 1903 * @controls: array of controls to add 1904 * @num_controls: number of elements in the array 1905 * 1906 * Return 0 for success, else error. 1907 */ 1908 int snd_soc_add_platform_controls(struct snd_soc_platform *platform, 1909 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1910 { 1911 return snd_soc_add_component_controls(&platform->component, controls, 1912 num_controls); 1913 } 1914 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls); 1915 1916 /** 1917 * snd_soc_add_card_controls - add an array of controls to a SoC card. 1918 * Convenience function to add a list of controls. 1919 * 1920 * @soc_card: SoC card to add controls to 1921 * @controls: array of controls to add 1922 * @num_controls: number of elements in the array 1923 * 1924 * Return 0 for success, else error. 1925 */ 1926 int snd_soc_add_card_controls(struct snd_soc_card *soc_card, 1927 const struct snd_kcontrol_new *controls, int num_controls) 1928 { 1929 struct snd_card *card = soc_card->snd_card; 1930 1931 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls, 1932 NULL, soc_card); 1933 } 1934 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls); 1935 1936 /** 1937 * snd_soc_add_dai_controls - add an array of controls to a DAI. 1938 * Convienience function to add a list of controls. 1939 * 1940 * @dai: DAI to add controls to 1941 * @controls: array of controls to add 1942 * @num_controls: number of elements in the array 1943 * 1944 * Return 0 for success, else error. 1945 */ 1946 int snd_soc_add_dai_controls(struct snd_soc_dai *dai, 1947 const struct snd_kcontrol_new *controls, int num_controls) 1948 { 1949 struct snd_card *card = dai->component->card->snd_card; 1950 1951 return snd_soc_add_controls(card, dai->dev, controls, num_controls, 1952 NULL, dai); 1953 } 1954 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls); 1955 1956 /** 1957 * snd_soc_dai_set_sysclk - configure DAI system or master clock. 1958 * @dai: DAI 1959 * @clk_id: DAI specific clock ID 1960 * @freq: new clock frequency in Hz 1961 * @dir: new clock direction - input/output. 1962 * 1963 * Configures the DAI master (MCLK) or system (SYSCLK) clocking. 1964 */ 1965 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, 1966 unsigned int freq, int dir) 1967 { 1968 if (dai->driver && dai->driver->ops->set_sysclk) 1969 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir); 1970 else if (dai->codec && dai->codec->driver->set_sysclk) 1971 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0, 1972 freq, dir); 1973 else 1974 return -ENOTSUPP; 1975 } 1976 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); 1977 1978 /** 1979 * snd_soc_codec_set_sysclk - configure CODEC system or master clock. 1980 * @codec: CODEC 1981 * @clk_id: DAI specific clock ID 1982 * @source: Source for the clock 1983 * @freq: new clock frequency in Hz 1984 * @dir: new clock direction - input/output. 1985 * 1986 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking. 1987 */ 1988 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id, 1989 int source, unsigned int freq, int dir) 1990 { 1991 if (codec->driver->set_sysclk) 1992 return codec->driver->set_sysclk(codec, clk_id, source, 1993 freq, dir); 1994 else 1995 return -ENOTSUPP; 1996 } 1997 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk); 1998 1999 /** 2000 * snd_soc_dai_set_clkdiv - configure DAI clock dividers. 2001 * @dai: DAI 2002 * @div_id: DAI specific clock divider ID 2003 * @div: new clock divisor. 2004 * 2005 * Configures the clock dividers. This is used to derive the best DAI bit and 2006 * frame clocks from the system or master clock. It's best to set the DAI bit 2007 * and frame clocks as low as possible to save system power. 2008 */ 2009 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, 2010 int div_id, int div) 2011 { 2012 if (dai->driver && dai->driver->ops->set_clkdiv) 2013 return dai->driver->ops->set_clkdiv(dai, div_id, div); 2014 else 2015 return -EINVAL; 2016 } 2017 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); 2018 2019 /** 2020 * snd_soc_dai_set_pll - configure DAI PLL. 2021 * @dai: DAI 2022 * @pll_id: DAI specific PLL ID 2023 * @source: DAI specific source for the PLL 2024 * @freq_in: PLL input clock frequency in Hz 2025 * @freq_out: requested PLL output clock frequency in Hz 2026 * 2027 * Configures and enables PLL to generate output clock based on input clock. 2028 */ 2029 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source, 2030 unsigned int freq_in, unsigned int freq_out) 2031 { 2032 if (dai->driver && dai->driver->ops->set_pll) 2033 return dai->driver->ops->set_pll(dai, pll_id, source, 2034 freq_in, freq_out); 2035 else if (dai->codec && dai->codec->driver->set_pll) 2036 return dai->codec->driver->set_pll(dai->codec, pll_id, source, 2037 freq_in, freq_out); 2038 else 2039 return -EINVAL; 2040 } 2041 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); 2042 2043 /* 2044 * snd_soc_codec_set_pll - configure codec PLL. 2045 * @codec: CODEC 2046 * @pll_id: DAI specific PLL ID 2047 * @source: DAI specific source for the PLL 2048 * @freq_in: PLL input clock frequency in Hz 2049 * @freq_out: requested PLL output clock frequency in Hz 2050 * 2051 * Configures and enables PLL to generate output clock based on input clock. 2052 */ 2053 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source, 2054 unsigned int freq_in, unsigned int freq_out) 2055 { 2056 if (codec->driver->set_pll) 2057 return codec->driver->set_pll(codec, pll_id, source, 2058 freq_in, freq_out); 2059 else 2060 return -EINVAL; 2061 } 2062 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll); 2063 2064 /** 2065 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio. 2066 * @dai: DAI 2067 * @ratio Ratio of BCLK to Sample rate. 2068 * 2069 * Configures the DAI for a preset BCLK to sample rate ratio. 2070 */ 2071 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio) 2072 { 2073 if (dai->driver && dai->driver->ops->set_bclk_ratio) 2074 return dai->driver->ops->set_bclk_ratio(dai, ratio); 2075 else 2076 return -EINVAL; 2077 } 2078 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio); 2079 2080 /** 2081 * snd_soc_dai_set_fmt - configure DAI hardware audio format. 2082 * @dai: DAI 2083 * @fmt: SND_SOC_DAIFMT_ format value. 2084 * 2085 * Configures the DAI hardware format and clocking. 2086 */ 2087 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 2088 { 2089 if (dai->driver == NULL) 2090 return -EINVAL; 2091 if (dai->driver->ops->set_fmt == NULL) 2092 return -ENOTSUPP; 2093 return dai->driver->ops->set_fmt(dai, fmt); 2094 } 2095 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); 2096 2097 /** 2098 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask. 2099 * @slots: Number of slots in use. 2100 * @tx_mask: bitmask representing active TX slots. 2101 * @rx_mask: bitmask representing active RX slots. 2102 * 2103 * Generates the TDM tx and rx slot default masks for DAI. 2104 */ 2105 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots, 2106 unsigned int *tx_mask, 2107 unsigned int *rx_mask) 2108 { 2109 if (*tx_mask || *rx_mask) 2110 return 0; 2111 2112 if (!slots) 2113 return -EINVAL; 2114 2115 *tx_mask = (1 << slots) - 1; 2116 *rx_mask = (1 << slots) - 1; 2117 2118 return 0; 2119 } 2120 2121 /** 2122 * snd_soc_dai_set_tdm_slot - configure DAI TDM. 2123 * @dai: DAI 2124 * @tx_mask: bitmask representing active TX slots. 2125 * @rx_mask: bitmask representing active RX slots. 2126 * @slots: Number of slots in use. 2127 * @slot_width: Width in bits for each slot. 2128 * 2129 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI 2130 * specific. 2131 */ 2132 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, 2133 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) 2134 { 2135 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask) 2136 dai->driver->ops->xlate_tdm_slot_mask(slots, 2137 &tx_mask, &rx_mask); 2138 else 2139 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask); 2140 2141 dai->tx_mask = tx_mask; 2142 dai->rx_mask = rx_mask; 2143 2144 if (dai->driver && dai->driver->ops->set_tdm_slot) 2145 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask, 2146 slots, slot_width); 2147 else 2148 return -ENOTSUPP; 2149 } 2150 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); 2151 2152 /** 2153 * snd_soc_dai_set_channel_map - configure DAI audio channel map 2154 * @dai: DAI 2155 * @tx_num: how many TX channels 2156 * @tx_slot: pointer to an array which imply the TX slot number channel 2157 * 0~num-1 uses 2158 * @rx_num: how many RX channels 2159 * @rx_slot: pointer to an array which imply the RX slot number channel 2160 * 0~num-1 uses 2161 * 2162 * configure the relationship between channel number and TDM slot number. 2163 */ 2164 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai, 2165 unsigned int tx_num, unsigned int *tx_slot, 2166 unsigned int rx_num, unsigned int *rx_slot) 2167 { 2168 if (dai->driver && dai->driver->ops->set_channel_map) 2169 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot, 2170 rx_num, rx_slot); 2171 else 2172 return -EINVAL; 2173 } 2174 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map); 2175 2176 /** 2177 * snd_soc_dai_set_tristate - configure DAI system or master clock. 2178 * @dai: DAI 2179 * @tristate: tristate enable 2180 * 2181 * Tristates the DAI so that others can use it. 2182 */ 2183 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) 2184 { 2185 if (dai->driver && dai->driver->ops->set_tristate) 2186 return dai->driver->ops->set_tristate(dai, tristate); 2187 else 2188 return -EINVAL; 2189 } 2190 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); 2191 2192 /** 2193 * snd_soc_dai_digital_mute - configure DAI system or master clock. 2194 * @dai: DAI 2195 * @mute: mute enable 2196 * @direction: stream to mute 2197 * 2198 * Mutes the DAI DAC. 2199 */ 2200 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute, 2201 int direction) 2202 { 2203 if (!dai->driver) 2204 return -ENOTSUPP; 2205 2206 if (dai->driver->ops->mute_stream) 2207 return dai->driver->ops->mute_stream(dai, mute, direction); 2208 else if (direction == SNDRV_PCM_STREAM_PLAYBACK && 2209 dai->driver->ops->digital_mute) 2210 return dai->driver->ops->digital_mute(dai, mute); 2211 else 2212 return -ENOTSUPP; 2213 } 2214 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); 2215 2216 static int snd_soc_init_multicodec(struct snd_soc_card *card, 2217 struct snd_soc_dai_link *dai_link) 2218 { 2219 /* Legacy codec/codec_dai link is a single entry in multicodec */ 2220 if (dai_link->codec_name || dai_link->codec_of_node || 2221 dai_link->codec_dai_name) { 2222 dai_link->num_codecs = 1; 2223 2224 dai_link->codecs = devm_kzalloc(card->dev, 2225 sizeof(struct snd_soc_dai_link_component), 2226 GFP_KERNEL); 2227 if (!dai_link->codecs) 2228 return -ENOMEM; 2229 2230 dai_link->codecs[0].name = dai_link->codec_name; 2231 dai_link->codecs[0].of_node = dai_link->codec_of_node; 2232 dai_link->codecs[0].dai_name = dai_link->codec_dai_name; 2233 } 2234 2235 if (!dai_link->codecs) { 2236 dev_err(card->dev, "ASoC: DAI link has no CODECs\n"); 2237 return -EINVAL; 2238 } 2239 2240 return 0; 2241 } 2242 2243 /** 2244 * snd_soc_register_card - Register a card with the ASoC core 2245 * 2246 * @card: Card to register 2247 * 2248 */ 2249 int snd_soc_register_card(struct snd_soc_card *card) 2250 { 2251 int i, j, ret; 2252 2253 if (!card->name || !card->dev) 2254 return -EINVAL; 2255 2256 for (i = 0; i < card->num_links; i++) { 2257 struct snd_soc_dai_link *link = &card->dai_link[i]; 2258 2259 ret = snd_soc_init_multicodec(card, link); 2260 if (ret) { 2261 dev_err(card->dev, "ASoC: failed to init multicodec\n"); 2262 return ret; 2263 } 2264 2265 for (j = 0; j < link->num_codecs; j++) { 2266 /* 2267 * Codec must be specified by 1 of name or OF node, 2268 * not both or neither. 2269 */ 2270 if (!!link->codecs[j].name == 2271 !!link->codecs[j].of_node) { 2272 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n", 2273 link->name); 2274 return -EINVAL; 2275 } 2276 /* Codec DAI name must be specified */ 2277 if (!link->codecs[j].dai_name) { 2278 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n", 2279 link->name); 2280 return -EINVAL; 2281 } 2282 } 2283 2284 /* 2285 * Platform may be specified by either name or OF node, but 2286 * can be left unspecified, and a dummy platform will be used. 2287 */ 2288 if (link->platform_name && link->platform_of_node) { 2289 dev_err(card->dev, 2290 "ASoC: Both platform name/of_node are set for %s\n", 2291 link->name); 2292 return -EINVAL; 2293 } 2294 2295 /* 2296 * CPU device may be specified by either name or OF node, but 2297 * can be left unspecified, and will be matched based on DAI 2298 * name alone.. 2299 */ 2300 if (link->cpu_name && link->cpu_of_node) { 2301 dev_err(card->dev, 2302 "ASoC: Neither/both cpu name/of_node are set for %s\n", 2303 link->name); 2304 return -EINVAL; 2305 } 2306 /* 2307 * At least one of CPU DAI name or CPU device name/node must be 2308 * specified 2309 */ 2310 if (!link->cpu_dai_name && 2311 !(link->cpu_name || link->cpu_of_node)) { 2312 dev_err(card->dev, 2313 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n", 2314 link->name); 2315 return -EINVAL; 2316 } 2317 } 2318 2319 dev_set_drvdata(card->dev, card); 2320 2321 snd_soc_initialize_card_lists(card); 2322 2323 soc_init_card_debugfs(card); 2324 2325 card->rtd = devm_kzalloc(card->dev, 2326 sizeof(struct snd_soc_pcm_runtime) * 2327 (card->num_links + card->num_aux_devs), 2328 GFP_KERNEL); 2329 if (card->rtd == NULL) 2330 return -ENOMEM; 2331 card->num_rtd = 0; 2332 card->rtd_aux = &card->rtd[card->num_links]; 2333 2334 for (i = 0; i < card->num_links; i++) { 2335 card->rtd[i].card = card; 2336 card->rtd[i].dai_link = &card->dai_link[i]; 2337 card->rtd[i].codec_dais = devm_kzalloc(card->dev, 2338 sizeof(struct snd_soc_dai *) * 2339 (card->rtd[i].dai_link->num_codecs), 2340 GFP_KERNEL); 2341 if (card->rtd[i].codec_dais == NULL) 2342 return -ENOMEM; 2343 } 2344 2345 for (i = 0; i < card->num_aux_devs; i++) 2346 card->rtd_aux[i].card = card; 2347 2348 INIT_LIST_HEAD(&card->dapm_dirty); 2349 card->instantiated = 0; 2350 mutex_init(&card->mutex); 2351 mutex_init(&card->dapm_mutex); 2352 2353 ret = snd_soc_instantiate_card(card); 2354 if (ret != 0) 2355 soc_cleanup_card_debugfs(card); 2356 2357 /* deactivate pins to sleep state */ 2358 for (i = 0; i < card->num_rtd; i++) { 2359 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 2360 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2361 int j; 2362 2363 for (j = 0; j < rtd->num_codecs; j++) { 2364 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 2365 if (!codec_dai->active) 2366 pinctrl_pm_select_sleep_state(codec_dai->dev); 2367 } 2368 2369 if (!cpu_dai->active) 2370 pinctrl_pm_select_sleep_state(cpu_dai->dev); 2371 } 2372 2373 return ret; 2374 } 2375 EXPORT_SYMBOL_GPL(snd_soc_register_card); 2376 2377 /** 2378 * snd_soc_unregister_card - Unregister a card with the ASoC core 2379 * 2380 * @card: Card to unregister 2381 * 2382 */ 2383 int snd_soc_unregister_card(struct snd_soc_card *card) 2384 { 2385 if (card->instantiated) { 2386 card->instantiated = false; 2387 snd_soc_dapm_shutdown(card); 2388 soc_cleanup_card_resources(card); 2389 } 2390 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name); 2391 2392 return 0; 2393 } 2394 EXPORT_SYMBOL_GPL(snd_soc_unregister_card); 2395 2396 /* 2397 * Simplify DAI link configuration by removing ".-1" from device names 2398 * and sanitizing names. 2399 */ 2400 static char *fmt_single_name(struct device *dev, int *id) 2401 { 2402 char *found, name[NAME_SIZE]; 2403 int id1, id2; 2404 2405 if (dev_name(dev) == NULL) 2406 return NULL; 2407 2408 strlcpy(name, dev_name(dev), NAME_SIZE); 2409 2410 /* are we a "%s.%d" name (platform and SPI components) */ 2411 found = strstr(name, dev->driver->name); 2412 if (found) { 2413 /* get ID */ 2414 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) { 2415 2416 /* discard ID from name if ID == -1 */ 2417 if (*id == -1) 2418 found[strlen(dev->driver->name)] = '\0'; 2419 } 2420 2421 } else { 2422 /* I2C component devices are named "bus-addr" */ 2423 if (sscanf(name, "%x-%x", &id1, &id2) == 2) { 2424 char tmp[NAME_SIZE]; 2425 2426 /* create unique ID number from I2C addr and bus */ 2427 *id = ((id1 & 0xffff) << 16) + id2; 2428 2429 /* sanitize component name for DAI link creation */ 2430 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name); 2431 strlcpy(name, tmp, NAME_SIZE); 2432 } else 2433 *id = 0; 2434 } 2435 2436 return kstrdup(name, GFP_KERNEL); 2437 } 2438 2439 /* 2440 * Simplify DAI link naming for single devices with multiple DAIs by removing 2441 * any ".-1" and using the DAI name (instead of device name). 2442 */ 2443 static inline char *fmt_multiple_name(struct device *dev, 2444 struct snd_soc_dai_driver *dai_drv) 2445 { 2446 if (dai_drv->name == NULL) { 2447 dev_err(dev, 2448 "ASoC: error - multiple DAI %s registered with no name\n", 2449 dev_name(dev)); 2450 return NULL; 2451 } 2452 2453 return kstrdup(dai_drv->name, GFP_KERNEL); 2454 } 2455 2456 /** 2457 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core 2458 * 2459 * @component: The component for which the DAIs should be unregistered 2460 */ 2461 static void snd_soc_unregister_dais(struct snd_soc_component *component) 2462 { 2463 struct snd_soc_dai *dai, *_dai; 2464 2465 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) { 2466 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n", 2467 dai->name); 2468 list_del(&dai->list); 2469 kfree(dai->name); 2470 kfree(dai); 2471 } 2472 } 2473 2474 /** 2475 * snd_soc_register_dais - Register a DAI with the ASoC core 2476 * 2477 * @component: The component the DAIs are registered for 2478 * @dai_drv: DAI driver to use for the DAIs 2479 * @count: Number of DAIs 2480 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the 2481 * parent's name. 2482 */ 2483 static int snd_soc_register_dais(struct snd_soc_component *component, 2484 struct snd_soc_dai_driver *dai_drv, size_t count, 2485 bool legacy_dai_naming) 2486 { 2487 struct device *dev = component->dev; 2488 struct snd_soc_dai *dai; 2489 unsigned int i; 2490 int ret; 2491 2492 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count); 2493 2494 component->dai_drv = dai_drv; 2495 component->num_dai = count; 2496 2497 for (i = 0; i < count; i++) { 2498 2499 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL); 2500 if (dai == NULL) { 2501 ret = -ENOMEM; 2502 goto err; 2503 } 2504 2505 /* 2506 * Back in the old days when we still had component-less DAIs, 2507 * instead of having a static name, component-less DAIs would 2508 * inherit the name of the parent device so it is possible to 2509 * register multiple instances of the DAI. We still need to keep 2510 * the same naming style even though those DAIs are not 2511 * component-less anymore. 2512 */ 2513 if (count == 1 && legacy_dai_naming) { 2514 dai->name = fmt_single_name(dev, &dai->id); 2515 } else { 2516 dai->name = fmt_multiple_name(dev, &dai_drv[i]); 2517 if (dai_drv[i].id) 2518 dai->id = dai_drv[i].id; 2519 else 2520 dai->id = i; 2521 } 2522 if (dai->name == NULL) { 2523 kfree(dai); 2524 ret = -ENOMEM; 2525 goto err; 2526 } 2527 2528 dai->component = component; 2529 dai->dev = dev; 2530 dai->driver = &dai_drv[i]; 2531 if (!dai->driver->ops) 2532 dai->driver->ops = &null_dai_ops; 2533 2534 list_add(&dai->list, &component->dai_list); 2535 2536 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name); 2537 } 2538 2539 return 0; 2540 2541 err: 2542 snd_soc_unregister_dais(component); 2543 2544 return ret; 2545 } 2546 2547 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, 2548 enum snd_soc_dapm_type type, int subseq) 2549 { 2550 struct snd_soc_component *component = dapm->component; 2551 2552 component->driver->seq_notifier(component, type, subseq); 2553 } 2554 2555 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm, 2556 int event) 2557 { 2558 struct snd_soc_component *component = dapm->component; 2559 2560 return component->driver->stream_event(component, event); 2561 } 2562 2563 static int snd_soc_component_initialize(struct snd_soc_component *component, 2564 const struct snd_soc_component_driver *driver, struct device *dev) 2565 { 2566 struct snd_soc_dapm_context *dapm; 2567 2568 component->name = fmt_single_name(dev, &component->id); 2569 if (!component->name) { 2570 dev_err(dev, "ASoC: Failed to allocate name\n"); 2571 return -ENOMEM; 2572 } 2573 2574 component->dev = dev; 2575 component->driver = driver; 2576 component->probe = component->driver->probe; 2577 component->remove = component->driver->remove; 2578 2579 if (!component->dapm_ptr) 2580 component->dapm_ptr = &component->dapm; 2581 2582 dapm = component->dapm_ptr; 2583 dapm->dev = dev; 2584 dapm->component = component; 2585 dapm->bias_level = SND_SOC_BIAS_OFF; 2586 dapm->idle_bias_off = true; 2587 if (driver->seq_notifier) 2588 dapm->seq_notifier = snd_soc_component_seq_notifier; 2589 if (driver->stream_event) 2590 dapm->stream_event = snd_soc_component_stream_event; 2591 2592 component->controls = driver->controls; 2593 component->num_controls = driver->num_controls; 2594 component->dapm_widgets = driver->dapm_widgets; 2595 component->num_dapm_widgets = driver->num_dapm_widgets; 2596 component->dapm_routes = driver->dapm_routes; 2597 component->num_dapm_routes = driver->num_dapm_routes; 2598 2599 INIT_LIST_HEAD(&component->dai_list); 2600 mutex_init(&component->io_mutex); 2601 2602 return 0; 2603 } 2604 2605 static void snd_soc_component_setup_regmap(struct snd_soc_component *component) 2606 { 2607 int val_bytes = regmap_get_val_bytes(component->regmap); 2608 2609 /* Errors are legitimate for non-integer byte multiples */ 2610 if (val_bytes > 0) 2611 component->val_bytes = val_bytes; 2612 } 2613 2614 #ifdef CONFIG_REGMAP 2615 2616 /** 2617 * snd_soc_component_init_regmap() - Initialize regmap instance for the component 2618 * @component: The component for which to initialize the regmap instance 2619 * @regmap: The regmap instance that should be used by the component 2620 * 2621 * This function allows deferred assignment of the regmap instance that is 2622 * associated with the component. Only use this if the regmap instance is not 2623 * yet ready when the component is registered. The function must also be called 2624 * before the first IO attempt of the component. 2625 */ 2626 void snd_soc_component_init_regmap(struct snd_soc_component *component, 2627 struct regmap *regmap) 2628 { 2629 component->regmap = regmap; 2630 snd_soc_component_setup_regmap(component); 2631 } 2632 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap); 2633 2634 /** 2635 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component 2636 * @component: The component for which to de-initialize the regmap instance 2637 * 2638 * Calls regmap_exit() on the regmap instance associated to the component and 2639 * removes the regmap instance from the component. 2640 * 2641 * This function should only be used if snd_soc_component_init_regmap() was used 2642 * to initialize the regmap instance. 2643 */ 2644 void snd_soc_component_exit_regmap(struct snd_soc_component *component) 2645 { 2646 regmap_exit(component->regmap); 2647 component->regmap = NULL; 2648 } 2649 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap); 2650 2651 #endif 2652 2653 static void snd_soc_component_add_unlocked(struct snd_soc_component *component) 2654 { 2655 if (!component->write && !component->read) { 2656 if (!component->regmap) 2657 component->regmap = dev_get_regmap(component->dev, NULL); 2658 if (component->regmap) 2659 snd_soc_component_setup_regmap(component); 2660 } 2661 2662 list_add(&component->list, &component_list); 2663 } 2664 2665 static void snd_soc_component_add(struct snd_soc_component *component) 2666 { 2667 mutex_lock(&client_mutex); 2668 snd_soc_component_add_unlocked(component); 2669 mutex_unlock(&client_mutex); 2670 } 2671 2672 static void snd_soc_component_cleanup(struct snd_soc_component *component) 2673 { 2674 snd_soc_unregister_dais(component); 2675 kfree(component->name); 2676 } 2677 2678 static void snd_soc_component_del_unlocked(struct snd_soc_component *component) 2679 { 2680 list_del(&component->list); 2681 } 2682 2683 static void snd_soc_component_del(struct snd_soc_component *component) 2684 { 2685 mutex_lock(&client_mutex); 2686 snd_soc_component_del_unlocked(component); 2687 mutex_unlock(&client_mutex); 2688 } 2689 2690 int snd_soc_register_component(struct device *dev, 2691 const struct snd_soc_component_driver *cmpnt_drv, 2692 struct snd_soc_dai_driver *dai_drv, 2693 int num_dai) 2694 { 2695 struct snd_soc_component *cmpnt; 2696 int ret; 2697 2698 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL); 2699 if (!cmpnt) { 2700 dev_err(dev, "ASoC: Failed to allocate memory\n"); 2701 return -ENOMEM; 2702 } 2703 2704 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev); 2705 if (ret) 2706 goto err_free; 2707 2708 cmpnt->ignore_pmdown_time = true; 2709 cmpnt->registered_as_component = true; 2710 2711 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true); 2712 if (ret < 0) { 2713 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret); 2714 goto err_cleanup; 2715 } 2716 2717 snd_soc_component_add(cmpnt); 2718 2719 return 0; 2720 2721 err_cleanup: 2722 snd_soc_component_cleanup(cmpnt); 2723 err_free: 2724 kfree(cmpnt); 2725 return ret; 2726 } 2727 EXPORT_SYMBOL_GPL(snd_soc_register_component); 2728 2729 /** 2730 * snd_soc_unregister_component - Unregister a component from the ASoC core 2731 * 2732 */ 2733 void snd_soc_unregister_component(struct device *dev) 2734 { 2735 struct snd_soc_component *cmpnt; 2736 2737 list_for_each_entry(cmpnt, &component_list, list) { 2738 if (dev == cmpnt->dev && cmpnt->registered_as_component) 2739 goto found; 2740 } 2741 return; 2742 2743 found: 2744 snd_soc_component_del(cmpnt); 2745 snd_soc_component_cleanup(cmpnt); 2746 kfree(cmpnt); 2747 } 2748 EXPORT_SYMBOL_GPL(snd_soc_unregister_component); 2749 2750 static int snd_soc_platform_drv_probe(struct snd_soc_component *component) 2751 { 2752 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2753 2754 return platform->driver->probe(platform); 2755 } 2756 2757 static void snd_soc_platform_drv_remove(struct snd_soc_component *component) 2758 { 2759 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2760 2761 platform->driver->remove(platform); 2762 } 2763 2764 /** 2765 * snd_soc_add_platform - Add a platform to the ASoC core 2766 * @dev: The parent device for the platform 2767 * @platform: The platform to add 2768 * @platform_driver: The driver for the platform 2769 */ 2770 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform, 2771 const struct snd_soc_platform_driver *platform_drv) 2772 { 2773 int ret; 2774 2775 ret = snd_soc_component_initialize(&platform->component, 2776 &platform_drv->component_driver, dev); 2777 if (ret) 2778 return ret; 2779 2780 platform->dev = dev; 2781 platform->driver = platform_drv; 2782 2783 if (platform_drv->probe) 2784 platform->component.probe = snd_soc_platform_drv_probe; 2785 if (platform_drv->remove) 2786 platform->component.remove = snd_soc_platform_drv_remove; 2787 2788 #ifdef CONFIG_DEBUG_FS 2789 platform->component.debugfs_prefix = "platform"; 2790 #endif 2791 2792 mutex_lock(&client_mutex); 2793 snd_soc_component_add_unlocked(&platform->component); 2794 list_add(&platform->list, &platform_list); 2795 mutex_unlock(&client_mutex); 2796 2797 dev_dbg(dev, "ASoC: Registered platform '%s'\n", 2798 platform->component.name); 2799 2800 return 0; 2801 } 2802 EXPORT_SYMBOL_GPL(snd_soc_add_platform); 2803 2804 /** 2805 * snd_soc_register_platform - Register a platform with the ASoC core 2806 * 2807 * @platform: platform to register 2808 */ 2809 int snd_soc_register_platform(struct device *dev, 2810 const struct snd_soc_platform_driver *platform_drv) 2811 { 2812 struct snd_soc_platform *platform; 2813 int ret; 2814 2815 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev)); 2816 2817 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL); 2818 if (platform == NULL) 2819 return -ENOMEM; 2820 2821 ret = snd_soc_add_platform(dev, platform, platform_drv); 2822 if (ret) 2823 kfree(platform); 2824 2825 return ret; 2826 } 2827 EXPORT_SYMBOL_GPL(snd_soc_register_platform); 2828 2829 /** 2830 * snd_soc_remove_platform - Remove a platform from the ASoC core 2831 * @platform: the platform to remove 2832 */ 2833 void snd_soc_remove_platform(struct snd_soc_platform *platform) 2834 { 2835 2836 mutex_lock(&client_mutex); 2837 list_del(&platform->list); 2838 snd_soc_component_del_unlocked(&platform->component); 2839 mutex_unlock(&client_mutex); 2840 2841 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n", 2842 platform->component.name); 2843 2844 snd_soc_component_cleanup(&platform->component); 2845 } 2846 EXPORT_SYMBOL_GPL(snd_soc_remove_platform); 2847 2848 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev) 2849 { 2850 struct snd_soc_platform *platform; 2851 2852 list_for_each_entry(platform, &platform_list, list) { 2853 if (dev == platform->dev) 2854 return platform; 2855 } 2856 2857 return NULL; 2858 } 2859 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform); 2860 2861 /** 2862 * snd_soc_unregister_platform - Unregister a platform from the ASoC core 2863 * 2864 * @platform: platform to unregister 2865 */ 2866 void snd_soc_unregister_platform(struct device *dev) 2867 { 2868 struct snd_soc_platform *platform; 2869 2870 platform = snd_soc_lookup_platform(dev); 2871 if (!platform) 2872 return; 2873 2874 snd_soc_remove_platform(platform); 2875 kfree(platform); 2876 } 2877 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform); 2878 2879 static u64 codec_format_map[] = { 2880 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE, 2881 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE, 2882 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE, 2883 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE, 2884 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, 2885 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE, 2886 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2887 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2888 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE, 2889 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE, 2890 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE, 2891 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE, 2892 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE, 2893 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE, 2894 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 2895 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE, 2896 }; 2897 2898 /* Fix up the DAI formats for endianness: codecs don't actually see 2899 * the endianness of the data but we're using the CPU format 2900 * definitions which do need to include endianness so we ensure that 2901 * codec DAIs always have both big and little endian variants set. 2902 */ 2903 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream) 2904 { 2905 int i; 2906 2907 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++) 2908 if (stream->formats & codec_format_map[i]) 2909 stream->formats |= codec_format_map[i]; 2910 } 2911 2912 static int snd_soc_codec_drv_probe(struct snd_soc_component *component) 2913 { 2914 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2915 2916 return codec->driver->probe(codec); 2917 } 2918 2919 static void snd_soc_codec_drv_remove(struct snd_soc_component *component) 2920 { 2921 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2922 2923 codec->driver->remove(codec); 2924 } 2925 2926 static int snd_soc_codec_drv_write(struct snd_soc_component *component, 2927 unsigned int reg, unsigned int val) 2928 { 2929 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2930 2931 return codec->driver->write(codec, reg, val); 2932 } 2933 2934 static int snd_soc_codec_drv_read(struct snd_soc_component *component, 2935 unsigned int reg, unsigned int *val) 2936 { 2937 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2938 2939 *val = codec->driver->read(codec, reg); 2940 2941 return 0; 2942 } 2943 2944 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm, 2945 enum snd_soc_bias_level level) 2946 { 2947 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm); 2948 2949 return codec->driver->set_bias_level(codec, level); 2950 } 2951 2952 /** 2953 * snd_soc_register_codec - Register a codec with the ASoC core 2954 * 2955 * @codec: codec to register 2956 */ 2957 int snd_soc_register_codec(struct device *dev, 2958 const struct snd_soc_codec_driver *codec_drv, 2959 struct snd_soc_dai_driver *dai_drv, 2960 int num_dai) 2961 { 2962 struct snd_soc_codec *codec; 2963 struct snd_soc_dai *dai; 2964 int ret, i; 2965 2966 dev_dbg(dev, "codec register %s\n", dev_name(dev)); 2967 2968 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 2969 if (codec == NULL) 2970 return -ENOMEM; 2971 2972 codec->component.dapm_ptr = &codec->dapm; 2973 codec->component.codec = codec; 2974 2975 ret = snd_soc_component_initialize(&codec->component, 2976 &codec_drv->component_driver, dev); 2977 if (ret) 2978 goto err_free; 2979 2980 if (codec_drv->controls) { 2981 codec->component.controls = codec_drv->controls; 2982 codec->component.num_controls = codec_drv->num_controls; 2983 } 2984 if (codec_drv->dapm_widgets) { 2985 codec->component.dapm_widgets = codec_drv->dapm_widgets; 2986 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets; 2987 } 2988 if (codec_drv->dapm_routes) { 2989 codec->component.dapm_routes = codec_drv->dapm_routes; 2990 codec->component.num_dapm_routes = codec_drv->num_dapm_routes; 2991 } 2992 2993 if (codec_drv->probe) 2994 codec->component.probe = snd_soc_codec_drv_probe; 2995 if (codec_drv->remove) 2996 codec->component.remove = snd_soc_codec_drv_remove; 2997 if (codec_drv->write) 2998 codec->component.write = snd_soc_codec_drv_write; 2999 if (codec_drv->read) 3000 codec->component.read = snd_soc_codec_drv_read; 3001 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time; 3002 codec->dapm.idle_bias_off = codec_drv->idle_bias_off; 3003 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off; 3004 if (codec_drv->seq_notifier) 3005 codec->dapm.seq_notifier = codec_drv->seq_notifier; 3006 if (codec_drv->set_bias_level) 3007 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level; 3008 codec->dev = dev; 3009 codec->driver = codec_drv; 3010 codec->component.val_bytes = codec_drv->reg_word_size; 3011 3012 #ifdef CONFIG_DEBUG_FS 3013 codec->component.init_debugfs = soc_init_codec_debugfs; 3014 codec->component.debugfs_prefix = "codec"; 3015 #endif 3016 3017 if (codec_drv->get_regmap) 3018 codec->component.regmap = codec_drv->get_regmap(dev); 3019 3020 for (i = 0; i < num_dai; i++) { 3021 fixup_codec_formats(&dai_drv[i].playback); 3022 fixup_codec_formats(&dai_drv[i].capture); 3023 } 3024 3025 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false); 3026 if (ret < 0) { 3027 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret); 3028 goto err_cleanup; 3029 } 3030 3031 list_for_each_entry(dai, &codec->component.dai_list, list) 3032 dai->codec = codec; 3033 3034 mutex_lock(&client_mutex); 3035 snd_soc_component_add_unlocked(&codec->component); 3036 list_add(&codec->list, &codec_list); 3037 mutex_unlock(&client_mutex); 3038 3039 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", 3040 codec->component.name); 3041 return 0; 3042 3043 err_cleanup: 3044 snd_soc_component_cleanup(&codec->component); 3045 err_free: 3046 kfree(codec); 3047 return ret; 3048 } 3049 EXPORT_SYMBOL_GPL(snd_soc_register_codec); 3050 3051 /** 3052 * snd_soc_unregister_codec - Unregister a codec from the ASoC core 3053 * 3054 * @codec: codec to unregister 3055 */ 3056 void snd_soc_unregister_codec(struct device *dev) 3057 { 3058 struct snd_soc_codec *codec; 3059 3060 list_for_each_entry(codec, &codec_list, list) { 3061 if (dev == codec->dev) 3062 goto found; 3063 } 3064 return; 3065 3066 found: 3067 3068 mutex_lock(&client_mutex); 3069 list_del(&codec->list); 3070 snd_soc_component_del_unlocked(&codec->component); 3071 mutex_unlock(&client_mutex); 3072 3073 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", 3074 codec->component.name); 3075 3076 snd_soc_component_cleanup(&codec->component); 3077 snd_soc_cache_exit(codec); 3078 kfree(codec); 3079 } 3080 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); 3081 3082 /* Retrieve a card's name from device tree */ 3083 int snd_soc_of_parse_card_name(struct snd_soc_card *card, 3084 const char *propname) 3085 { 3086 struct device_node *np; 3087 int ret; 3088 3089 if (!card->dev) { 3090 pr_err("card->dev is not set before calling %s\n", __func__); 3091 return -EINVAL; 3092 } 3093 3094 np = card->dev->of_node; 3095 3096 ret = of_property_read_string_index(np, propname, 0, &card->name); 3097 /* 3098 * EINVAL means the property does not exist. This is fine providing 3099 * card->name was previously set, which is checked later in 3100 * snd_soc_register_card. 3101 */ 3102 if (ret < 0 && ret != -EINVAL) { 3103 dev_err(card->dev, 3104 "ASoC: Property '%s' could not be read: %d\n", 3105 propname, ret); 3106 return ret; 3107 } 3108 3109 return 0; 3110 } 3111 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name); 3112 3113 static const struct snd_soc_dapm_widget simple_widgets[] = { 3114 SND_SOC_DAPM_MIC("Microphone", NULL), 3115 SND_SOC_DAPM_LINE("Line", NULL), 3116 SND_SOC_DAPM_HP("Headphone", NULL), 3117 SND_SOC_DAPM_SPK("Speaker", NULL), 3118 }; 3119 3120 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card, 3121 const char *propname) 3122 { 3123 struct device_node *np = card->dev->of_node; 3124 struct snd_soc_dapm_widget *widgets; 3125 const char *template, *wname; 3126 int i, j, num_widgets, ret; 3127 3128 num_widgets = of_property_count_strings(np, propname); 3129 if (num_widgets < 0) { 3130 dev_err(card->dev, 3131 "ASoC: Property '%s' does not exist\n", propname); 3132 return -EINVAL; 3133 } 3134 if (num_widgets & 1) { 3135 dev_err(card->dev, 3136 "ASoC: Property '%s' length is not even\n", propname); 3137 return -EINVAL; 3138 } 3139 3140 num_widgets /= 2; 3141 if (!num_widgets) { 3142 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3143 propname); 3144 return -EINVAL; 3145 } 3146 3147 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets), 3148 GFP_KERNEL); 3149 if (!widgets) { 3150 dev_err(card->dev, 3151 "ASoC: Could not allocate memory for widgets\n"); 3152 return -ENOMEM; 3153 } 3154 3155 for (i = 0; i < num_widgets; i++) { 3156 ret = of_property_read_string_index(np, propname, 3157 2 * i, &template); 3158 if (ret) { 3159 dev_err(card->dev, 3160 "ASoC: Property '%s' index %d read error:%d\n", 3161 propname, 2 * i, ret); 3162 return -EINVAL; 3163 } 3164 3165 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) { 3166 if (!strncmp(template, simple_widgets[j].name, 3167 strlen(simple_widgets[j].name))) { 3168 widgets[i] = simple_widgets[j]; 3169 break; 3170 } 3171 } 3172 3173 if (j >= ARRAY_SIZE(simple_widgets)) { 3174 dev_err(card->dev, 3175 "ASoC: DAPM widget '%s' is not supported\n", 3176 template); 3177 return -EINVAL; 3178 } 3179 3180 ret = of_property_read_string_index(np, propname, 3181 (2 * i) + 1, 3182 &wname); 3183 if (ret) { 3184 dev_err(card->dev, 3185 "ASoC: Property '%s' index %d read error:%d\n", 3186 propname, (2 * i) + 1, ret); 3187 return -EINVAL; 3188 } 3189 3190 widgets[i].name = wname; 3191 } 3192 3193 card->dapm_widgets = widgets; 3194 card->num_dapm_widgets = num_widgets; 3195 3196 return 0; 3197 } 3198 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets); 3199 3200 int snd_soc_of_parse_tdm_slot(struct device_node *np, 3201 unsigned int *slots, 3202 unsigned int *slot_width) 3203 { 3204 u32 val; 3205 int ret; 3206 3207 if (of_property_read_bool(np, "dai-tdm-slot-num")) { 3208 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val); 3209 if (ret) 3210 return ret; 3211 3212 if (slots) 3213 *slots = val; 3214 } 3215 3216 if (of_property_read_bool(np, "dai-tdm-slot-width")) { 3217 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val); 3218 if (ret) 3219 return ret; 3220 3221 if (slot_width) 3222 *slot_width = val; 3223 } 3224 3225 return 0; 3226 } 3227 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot); 3228 3229 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card, 3230 const char *propname) 3231 { 3232 struct device_node *np = card->dev->of_node; 3233 int num_routes; 3234 struct snd_soc_dapm_route *routes; 3235 int i, ret; 3236 3237 num_routes = of_property_count_strings(np, propname); 3238 if (num_routes < 0 || num_routes & 1) { 3239 dev_err(card->dev, 3240 "ASoC: Property '%s' does not exist or its length is not even\n", 3241 propname); 3242 return -EINVAL; 3243 } 3244 num_routes /= 2; 3245 if (!num_routes) { 3246 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3247 propname); 3248 return -EINVAL; 3249 } 3250 3251 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes), 3252 GFP_KERNEL); 3253 if (!routes) { 3254 dev_err(card->dev, 3255 "ASoC: Could not allocate DAPM route table\n"); 3256 return -EINVAL; 3257 } 3258 3259 for (i = 0; i < num_routes; i++) { 3260 ret = of_property_read_string_index(np, propname, 3261 2 * i, &routes[i].sink); 3262 if (ret) { 3263 dev_err(card->dev, 3264 "ASoC: Property '%s' index %d could not be read: %d\n", 3265 propname, 2 * i, ret); 3266 return -EINVAL; 3267 } 3268 ret = of_property_read_string_index(np, propname, 3269 (2 * i) + 1, &routes[i].source); 3270 if (ret) { 3271 dev_err(card->dev, 3272 "ASoC: Property '%s' index %d could not be read: %d\n", 3273 propname, (2 * i) + 1, ret); 3274 return -EINVAL; 3275 } 3276 } 3277 3278 card->num_dapm_routes = num_routes; 3279 card->dapm_routes = routes; 3280 3281 return 0; 3282 } 3283 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing); 3284 3285 unsigned int snd_soc_of_parse_daifmt(struct device_node *np, 3286 const char *prefix, 3287 struct device_node **bitclkmaster, 3288 struct device_node **framemaster) 3289 { 3290 int ret, i; 3291 char prop[128]; 3292 unsigned int format = 0; 3293 int bit, frame; 3294 const char *str; 3295 struct { 3296 char *name; 3297 unsigned int val; 3298 } of_fmt_table[] = { 3299 { "i2s", SND_SOC_DAIFMT_I2S }, 3300 { "right_j", SND_SOC_DAIFMT_RIGHT_J }, 3301 { "left_j", SND_SOC_DAIFMT_LEFT_J }, 3302 { "dsp_a", SND_SOC_DAIFMT_DSP_A }, 3303 { "dsp_b", SND_SOC_DAIFMT_DSP_B }, 3304 { "ac97", SND_SOC_DAIFMT_AC97 }, 3305 { "pdm", SND_SOC_DAIFMT_PDM}, 3306 { "msb", SND_SOC_DAIFMT_MSB }, 3307 { "lsb", SND_SOC_DAIFMT_LSB }, 3308 }; 3309 3310 if (!prefix) 3311 prefix = ""; 3312 3313 /* 3314 * check "[prefix]format = xxx" 3315 * SND_SOC_DAIFMT_FORMAT_MASK area 3316 */ 3317 snprintf(prop, sizeof(prop), "%sformat", prefix); 3318 ret = of_property_read_string(np, prop, &str); 3319 if (ret == 0) { 3320 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) { 3321 if (strcmp(str, of_fmt_table[i].name) == 0) { 3322 format |= of_fmt_table[i].val; 3323 break; 3324 } 3325 } 3326 } 3327 3328 /* 3329 * check "[prefix]continuous-clock" 3330 * SND_SOC_DAIFMT_CLOCK_MASK area 3331 */ 3332 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix); 3333 if (of_get_property(np, prop, NULL)) 3334 format |= SND_SOC_DAIFMT_CONT; 3335 else 3336 format |= SND_SOC_DAIFMT_GATED; 3337 3338 /* 3339 * check "[prefix]bitclock-inversion" 3340 * check "[prefix]frame-inversion" 3341 * SND_SOC_DAIFMT_INV_MASK area 3342 */ 3343 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix); 3344 bit = !!of_get_property(np, prop, NULL); 3345 3346 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix); 3347 frame = !!of_get_property(np, prop, NULL); 3348 3349 switch ((bit << 4) + frame) { 3350 case 0x11: 3351 format |= SND_SOC_DAIFMT_IB_IF; 3352 break; 3353 case 0x10: 3354 format |= SND_SOC_DAIFMT_IB_NF; 3355 break; 3356 case 0x01: 3357 format |= SND_SOC_DAIFMT_NB_IF; 3358 break; 3359 default: 3360 /* SND_SOC_DAIFMT_NB_NF is default */ 3361 break; 3362 } 3363 3364 /* 3365 * check "[prefix]bitclock-master" 3366 * check "[prefix]frame-master" 3367 * SND_SOC_DAIFMT_MASTER_MASK area 3368 */ 3369 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix); 3370 bit = !!of_get_property(np, prop, NULL); 3371 if (bit && bitclkmaster) 3372 *bitclkmaster = of_parse_phandle(np, prop, 0); 3373 3374 snprintf(prop, sizeof(prop), "%sframe-master", prefix); 3375 frame = !!of_get_property(np, prop, NULL); 3376 if (frame && framemaster) 3377 *framemaster = of_parse_phandle(np, prop, 0); 3378 3379 switch ((bit << 4) + frame) { 3380 case 0x11: 3381 format |= SND_SOC_DAIFMT_CBM_CFM; 3382 break; 3383 case 0x10: 3384 format |= SND_SOC_DAIFMT_CBM_CFS; 3385 break; 3386 case 0x01: 3387 format |= SND_SOC_DAIFMT_CBS_CFM; 3388 break; 3389 default: 3390 format |= SND_SOC_DAIFMT_CBS_CFS; 3391 break; 3392 } 3393 3394 return format; 3395 } 3396 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt); 3397 3398 static int snd_soc_get_dai_name(struct of_phandle_args *args, 3399 const char **dai_name) 3400 { 3401 struct snd_soc_component *pos; 3402 int ret = -EPROBE_DEFER; 3403 3404 mutex_lock(&client_mutex); 3405 list_for_each_entry(pos, &component_list, list) { 3406 if (pos->dev->of_node != args->np) 3407 continue; 3408 3409 if (pos->driver->of_xlate_dai_name) { 3410 ret = pos->driver->of_xlate_dai_name(pos, 3411 args, 3412 dai_name); 3413 } else { 3414 int id = -1; 3415 3416 switch (args->args_count) { 3417 case 0: 3418 id = 0; /* same as dai_drv[0] */ 3419 break; 3420 case 1: 3421 id = args->args[0]; 3422 break; 3423 default: 3424 /* not supported */ 3425 break; 3426 } 3427 3428 if (id < 0 || id >= pos->num_dai) { 3429 ret = -EINVAL; 3430 continue; 3431 } 3432 3433 ret = 0; 3434 3435 *dai_name = pos->dai_drv[id].name; 3436 if (!*dai_name) 3437 *dai_name = pos->name; 3438 } 3439 3440 break; 3441 } 3442 mutex_unlock(&client_mutex); 3443 return ret; 3444 } 3445 3446 int snd_soc_of_get_dai_name(struct device_node *of_node, 3447 const char **dai_name) 3448 { 3449 struct of_phandle_args args; 3450 int ret; 3451 3452 ret = of_parse_phandle_with_args(of_node, "sound-dai", 3453 "#sound-dai-cells", 0, &args); 3454 if (ret) 3455 return ret; 3456 3457 ret = snd_soc_get_dai_name(&args, dai_name); 3458 3459 of_node_put(args.np); 3460 3461 return ret; 3462 } 3463 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name); 3464 3465 /* 3466 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree 3467 * @dev: Card device 3468 * @of_node: Device node 3469 * @dai_link: DAI link 3470 * 3471 * Builds an array of CODEC DAI components from the DAI link property 3472 * 'sound-dai'. 3473 * The array is set in the DAI link and the number of DAIs is set accordingly. 3474 * The device nodes in the array (of_node) must be dereferenced by the caller. 3475 * 3476 * Returns 0 for success 3477 */ 3478 int snd_soc_of_get_dai_link_codecs(struct device *dev, 3479 struct device_node *of_node, 3480 struct snd_soc_dai_link *dai_link) 3481 { 3482 struct of_phandle_args args; 3483 struct snd_soc_dai_link_component *component; 3484 char *name; 3485 int index, num_codecs, ret; 3486 3487 /* Count the number of CODECs */ 3488 name = "sound-dai"; 3489 num_codecs = of_count_phandle_with_args(of_node, name, 3490 "#sound-dai-cells"); 3491 if (num_codecs <= 0) { 3492 if (num_codecs == -ENOENT) 3493 dev_err(dev, "No 'sound-dai' property\n"); 3494 else 3495 dev_err(dev, "Bad phandle in 'sound-dai'\n"); 3496 return num_codecs; 3497 } 3498 component = devm_kzalloc(dev, 3499 sizeof *component * num_codecs, 3500 GFP_KERNEL); 3501 if (!component) 3502 return -ENOMEM; 3503 dai_link->codecs = component; 3504 dai_link->num_codecs = num_codecs; 3505 3506 /* Parse the list */ 3507 for (index = 0, component = dai_link->codecs; 3508 index < dai_link->num_codecs; 3509 index++, component++) { 3510 ret = of_parse_phandle_with_args(of_node, name, 3511 "#sound-dai-cells", 3512 index, &args); 3513 if (ret) 3514 goto err; 3515 component->of_node = args.np; 3516 ret = snd_soc_get_dai_name(&args, &component->dai_name); 3517 if (ret < 0) 3518 goto err; 3519 } 3520 return 0; 3521 err: 3522 for (index = 0, component = dai_link->codecs; 3523 index < dai_link->num_codecs; 3524 index++, component++) { 3525 if (!component->of_node) 3526 break; 3527 of_node_put(component->of_node); 3528 component->of_node = NULL; 3529 } 3530 dai_link->codecs = NULL; 3531 dai_link->num_codecs = 0; 3532 return ret; 3533 } 3534 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs); 3535 3536 static int __init snd_soc_init(void) 3537 { 3538 #ifdef CONFIG_DEBUG_FS 3539 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); 3540 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) { 3541 pr_warn("ASoC: Failed to create debugfs directory\n"); 3542 snd_soc_debugfs_root = NULL; 3543 } 3544 3545 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL, 3546 &codec_list_fops)) 3547 pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); 3548 3549 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, 3550 &dai_list_fops)) 3551 pr_warn("ASoC: Failed to create DAI list debugfs file\n"); 3552 3553 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL, 3554 &platform_list_fops)) 3555 pr_warn("ASoC: Failed to create platform list debugfs file\n"); 3556 #endif 3557 3558 snd_soc_util_init(); 3559 3560 return platform_driver_register(&soc_driver); 3561 } 3562 module_init(snd_soc_init); 3563 3564 static void __exit snd_soc_exit(void) 3565 { 3566 snd_soc_util_exit(); 3567 3568 #ifdef CONFIG_DEBUG_FS 3569 debugfs_remove_recursive(snd_soc_debugfs_root); 3570 #endif 3571 platform_driver_unregister(&soc_driver); 3572 } 3573 module_exit(snd_soc_exit); 3574 3575 /* Module information */ 3576 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); 3577 MODULE_DESCRIPTION("ALSA SoC Core"); 3578 MODULE_LICENSE("GPL"); 3579 MODULE_ALIAS("platform:soc-audio"); 3580