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 static struct attribute *soc_dev_attrs[] = { 195 &dev_attr_codec_reg.attr, 196 &dev_attr_pmdown_time.attr, 197 NULL 198 }; 199 200 static umode_t soc_dev_attr_is_visible(struct kobject *kobj, 201 struct attribute *attr, int idx) 202 { 203 struct device *dev = kobj_to_dev(kobj); 204 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 205 206 if (attr == &dev_attr_pmdown_time.attr) 207 return attr->mode; /* always visible */ 208 return rtd->codec ? attr->mode : 0; /* enabled only with codec */ 209 } 210 211 static const struct attribute_group soc_dapm_dev_group = { 212 .attrs = soc_dapm_dev_attrs, 213 .is_visible = soc_dev_attr_is_visible, 214 }; 215 216 static const struct attribute_group soc_dev_roup = { 217 .attrs = soc_dev_attrs, 218 .is_visible = soc_dev_attr_is_visible, 219 }; 220 221 static const struct attribute_group *soc_dev_attr_groups[] = { 222 &soc_dapm_dev_group, 223 &soc_dev_roup, 224 NULL 225 }; 226 227 #ifdef CONFIG_DEBUG_FS 228 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf, 229 size_t count, loff_t *ppos) 230 { 231 ssize_t ret; 232 struct snd_soc_codec *codec = file->private_data; 233 char *buf; 234 235 if (*ppos < 0 || !count) 236 return -EINVAL; 237 238 buf = kmalloc(count, GFP_KERNEL); 239 if (!buf) 240 return -ENOMEM; 241 242 ret = soc_codec_reg_show(codec, buf, count, *ppos); 243 if (ret >= 0) { 244 if (copy_to_user(user_buf, buf, ret)) { 245 kfree(buf); 246 return -EFAULT; 247 } 248 *ppos += ret; 249 } 250 251 kfree(buf); 252 return ret; 253 } 254 255 static ssize_t codec_reg_write_file(struct file *file, 256 const char __user *user_buf, size_t count, loff_t *ppos) 257 { 258 char buf[32]; 259 size_t buf_size; 260 char *start = buf; 261 unsigned long reg, value; 262 struct snd_soc_codec *codec = file->private_data; 263 int ret; 264 265 buf_size = min(count, (sizeof(buf)-1)); 266 if (copy_from_user(buf, user_buf, buf_size)) 267 return -EFAULT; 268 buf[buf_size] = 0; 269 270 while (*start == ' ') 271 start++; 272 reg = simple_strtoul(start, &start, 16); 273 while (*start == ' ') 274 start++; 275 ret = kstrtoul(start, 16, &value); 276 if (ret) 277 return ret; 278 279 /* Userspace has been fiddling around behind the kernel's back */ 280 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE); 281 282 snd_soc_write(codec, reg, value); 283 return buf_size; 284 } 285 286 static const struct file_operations codec_reg_fops = { 287 .open = simple_open, 288 .read = codec_reg_read_file, 289 .write = codec_reg_write_file, 290 .llseek = default_llseek, 291 }; 292 293 static void soc_init_component_debugfs(struct snd_soc_component *component) 294 { 295 if (component->debugfs_prefix) { 296 char *name; 297 298 name = kasprintf(GFP_KERNEL, "%s:%s", 299 component->debugfs_prefix, component->name); 300 if (name) { 301 component->debugfs_root = debugfs_create_dir(name, 302 component->card->debugfs_card_root); 303 kfree(name); 304 } 305 } else { 306 component->debugfs_root = debugfs_create_dir(component->name, 307 component->card->debugfs_card_root); 308 } 309 310 if (!component->debugfs_root) { 311 dev_warn(component->dev, 312 "ASoC: Failed to create component debugfs directory\n"); 313 return; 314 } 315 316 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component), 317 component->debugfs_root); 318 319 if (component->init_debugfs) 320 component->init_debugfs(component); 321 } 322 323 static void soc_cleanup_component_debugfs(struct snd_soc_component *component) 324 { 325 debugfs_remove_recursive(component->debugfs_root); 326 } 327 328 static void soc_init_codec_debugfs(struct snd_soc_component *component) 329 { 330 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 331 332 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, 333 codec->component.debugfs_root, 334 codec, &codec_reg_fops); 335 if (!codec->debugfs_reg) 336 dev_warn(codec->dev, 337 "ASoC: Failed to create codec register debugfs file\n"); 338 } 339 340 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf, 341 size_t count, loff_t *ppos) 342 { 343 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 344 ssize_t len, ret = 0; 345 struct snd_soc_codec *codec; 346 347 if (!buf) 348 return -ENOMEM; 349 350 list_for_each_entry(codec, &codec_list, list) { 351 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 352 codec->component.name); 353 if (len >= 0) 354 ret += len; 355 if (ret > PAGE_SIZE) { 356 ret = PAGE_SIZE; 357 break; 358 } 359 } 360 361 if (ret >= 0) 362 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 363 364 kfree(buf); 365 366 return ret; 367 } 368 369 static const struct file_operations codec_list_fops = { 370 .read = codec_list_read_file, 371 .llseek = default_llseek,/* read accesses f_pos */ 372 }; 373 374 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf, 375 size_t count, loff_t *ppos) 376 { 377 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 378 ssize_t len, ret = 0; 379 struct snd_soc_component *component; 380 struct snd_soc_dai *dai; 381 382 if (!buf) 383 return -ENOMEM; 384 385 list_for_each_entry(component, &component_list, list) { 386 list_for_each_entry(dai, &component->dai_list, list) { 387 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 388 dai->name); 389 if (len >= 0) 390 ret += len; 391 if (ret > PAGE_SIZE) { 392 ret = PAGE_SIZE; 393 break; 394 } 395 } 396 } 397 398 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 399 400 kfree(buf); 401 402 return ret; 403 } 404 405 static const struct file_operations dai_list_fops = { 406 .read = dai_list_read_file, 407 .llseek = default_llseek,/* read accesses f_pos */ 408 }; 409 410 static ssize_t platform_list_read_file(struct file *file, 411 char __user *user_buf, 412 size_t count, loff_t *ppos) 413 { 414 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 415 ssize_t len, ret = 0; 416 struct snd_soc_platform *platform; 417 418 if (!buf) 419 return -ENOMEM; 420 421 list_for_each_entry(platform, &platform_list, list) { 422 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 423 platform->component.name); 424 if (len >= 0) 425 ret += len; 426 if (ret > PAGE_SIZE) { 427 ret = PAGE_SIZE; 428 break; 429 } 430 } 431 432 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 433 434 kfree(buf); 435 436 return ret; 437 } 438 439 static const struct file_operations platform_list_fops = { 440 .read = platform_list_read_file, 441 .llseek = default_llseek,/* read accesses f_pos */ 442 }; 443 444 static void soc_init_card_debugfs(struct snd_soc_card *card) 445 { 446 card->debugfs_card_root = debugfs_create_dir(card->name, 447 snd_soc_debugfs_root); 448 if (!card->debugfs_card_root) { 449 dev_warn(card->dev, 450 "ASoC: Failed to create card debugfs directory\n"); 451 return; 452 } 453 454 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644, 455 card->debugfs_card_root, 456 &card->pop_time); 457 if (!card->debugfs_pop_time) 458 dev_warn(card->dev, 459 "ASoC: Failed to create pop time debugfs file\n"); 460 } 461 462 static void soc_cleanup_card_debugfs(struct snd_soc_card *card) 463 { 464 debugfs_remove_recursive(card->debugfs_card_root); 465 } 466 467 #else 468 469 #define soc_init_codec_debugfs NULL 470 471 static inline void soc_init_component_debugfs( 472 struct snd_soc_component *component) 473 { 474 } 475 476 static inline void soc_cleanup_component_debugfs( 477 struct snd_soc_component *component) 478 { 479 } 480 481 static inline void soc_init_card_debugfs(struct snd_soc_card *card) 482 { 483 } 484 485 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) 486 { 487 } 488 #endif 489 490 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card, 491 const char *dai_link, int stream) 492 { 493 int i; 494 495 for (i = 0; i < card->num_links; i++) { 496 if (card->rtd[i].dai_link->no_pcm && 497 !strcmp(card->rtd[i].dai_link->name, dai_link)) 498 return card->rtd[i].pcm->streams[stream].substream; 499 } 500 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link); 501 return NULL; 502 } 503 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream); 504 505 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card, 506 const char *dai_link) 507 { 508 int i; 509 510 for (i = 0; i < card->num_links; i++) { 511 if (!strcmp(card->rtd[i].dai_link->name, dai_link)) 512 return &card->rtd[i]; 513 } 514 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link); 515 return NULL; 516 } 517 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime); 518 519 static void codec2codec_close_delayed_work(struct work_struct *work) 520 { 521 /* Currently nothing to do for c2c links 522 * Since c2c links are internal nodes in the DAPM graph and 523 * don't interface with the outside world or application layer 524 * we don't have to do any special handling on close. 525 */ 526 } 527 528 #ifdef CONFIG_PM_SLEEP 529 /* powers down audio subsystem for suspend */ 530 int snd_soc_suspend(struct device *dev) 531 { 532 struct snd_soc_card *card = dev_get_drvdata(dev); 533 struct snd_soc_codec *codec; 534 int i, j; 535 536 /* If the card is not initialized yet there is nothing to do */ 537 if (!card->instantiated) 538 return 0; 539 540 /* Due to the resume being scheduled into a workqueue we could 541 * suspend before that's finished - wait for it to complete. 542 */ 543 snd_power_lock(card->snd_card); 544 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0); 545 snd_power_unlock(card->snd_card); 546 547 /* we're going to block userspace touching us until resume completes */ 548 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot); 549 550 /* mute any active DACs */ 551 for (i = 0; i < card->num_rtd; i++) { 552 553 if (card->rtd[i].dai_link->ignore_suspend) 554 continue; 555 556 for (j = 0; j < card->rtd[i].num_codecs; j++) { 557 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 558 struct snd_soc_dai_driver *drv = dai->driver; 559 560 if (drv->ops->digital_mute && dai->playback_active) 561 drv->ops->digital_mute(dai, 1); 562 } 563 } 564 565 /* suspend all pcms */ 566 for (i = 0; i < card->num_rtd; i++) { 567 if (card->rtd[i].dai_link->ignore_suspend) 568 continue; 569 570 snd_pcm_suspend_all(card->rtd[i].pcm); 571 } 572 573 if (card->suspend_pre) 574 card->suspend_pre(card); 575 576 for (i = 0; i < card->num_rtd; i++) { 577 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 578 579 if (card->rtd[i].dai_link->ignore_suspend) 580 continue; 581 582 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control) 583 cpu_dai->driver->suspend(cpu_dai); 584 } 585 586 /* close any waiting streams and save state */ 587 for (i = 0; i < card->num_rtd; i++) { 588 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais; 589 flush_delayed_work(&card->rtd[i].delayed_work); 590 for (j = 0; j < card->rtd[i].num_codecs; j++) { 591 codec_dais[j]->codec->dapm.suspend_bias_level = 592 codec_dais[j]->codec->dapm.bias_level; 593 } 594 } 595 596 for (i = 0; i < card->num_rtd; i++) { 597 598 if (card->rtd[i].dai_link->ignore_suspend) 599 continue; 600 601 snd_soc_dapm_stream_event(&card->rtd[i], 602 SNDRV_PCM_STREAM_PLAYBACK, 603 SND_SOC_DAPM_STREAM_SUSPEND); 604 605 snd_soc_dapm_stream_event(&card->rtd[i], 606 SNDRV_PCM_STREAM_CAPTURE, 607 SND_SOC_DAPM_STREAM_SUSPEND); 608 } 609 610 /* Recheck all endpoints too, their state is affected by suspend */ 611 dapm_mark_endpoints_dirty(card); 612 snd_soc_dapm_sync(&card->dapm); 613 614 /* suspend all CODECs */ 615 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 616 /* If there are paths active then the CODEC will be held with 617 * bias _ON and should not be suspended. */ 618 if (!codec->suspended) { 619 switch (codec->dapm.bias_level) { 620 case SND_SOC_BIAS_STANDBY: 621 /* 622 * If the CODEC is capable of idle 623 * bias off then being in STANDBY 624 * means it's doing something, 625 * otherwise fall through. 626 */ 627 if (codec->dapm.idle_bias_off) { 628 dev_dbg(codec->dev, 629 "ASoC: idle_bias_off CODEC on over suspend\n"); 630 break; 631 } 632 633 case SND_SOC_BIAS_OFF: 634 if (codec->driver->suspend) 635 codec->driver->suspend(codec); 636 codec->suspended = 1; 637 if (codec->component.regmap) 638 regcache_mark_dirty(codec->component.regmap); 639 /* deactivate pins to sleep state */ 640 pinctrl_pm_select_sleep_state(codec->dev); 641 break; 642 default: 643 dev_dbg(codec->dev, 644 "ASoC: CODEC is on over suspend\n"); 645 break; 646 } 647 } 648 } 649 650 for (i = 0; i < card->num_rtd; i++) { 651 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 652 653 if (card->rtd[i].dai_link->ignore_suspend) 654 continue; 655 656 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control) 657 cpu_dai->driver->suspend(cpu_dai); 658 659 /* deactivate pins to sleep state */ 660 pinctrl_pm_select_sleep_state(cpu_dai->dev); 661 } 662 663 if (card->suspend_post) 664 card->suspend_post(card); 665 666 return 0; 667 } 668 EXPORT_SYMBOL_GPL(snd_soc_suspend); 669 670 /* deferred resume work, so resume can complete before we finished 671 * setting our codec back up, which can be very slow on I2C 672 */ 673 static void soc_resume_deferred(struct work_struct *work) 674 { 675 struct snd_soc_card *card = 676 container_of(work, struct snd_soc_card, deferred_resume_work); 677 struct snd_soc_codec *codec; 678 int i, j; 679 680 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time, 681 * so userspace apps are blocked from touching us 682 */ 683 684 dev_dbg(card->dev, "ASoC: starting resume work\n"); 685 686 /* Bring us up into D2 so that DAPM starts enabling things */ 687 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2); 688 689 if (card->resume_pre) 690 card->resume_pre(card); 691 692 /* resume control bus DAIs */ 693 for (i = 0; i < card->num_rtd; i++) { 694 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 695 696 if (card->rtd[i].dai_link->ignore_suspend) 697 continue; 698 699 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control) 700 cpu_dai->driver->resume(cpu_dai); 701 } 702 703 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 704 /* If the CODEC was idle over suspend then it will have been 705 * left with bias OFF or STANDBY and suspended so we must now 706 * resume. Otherwise the suspend was suppressed. 707 */ 708 if (codec->suspended) { 709 switch (codec->dapm.bias_level) { 710 case SND_SOC_BIAS_STANDBY: 711 case SND_SOC_BIAS_OFF: 712 if (codec->driver->resume) 713 codec->driver->resume(codec); 714 codec->suspended = 0; 715 break; 716 default: 717 dev_dbg(codec->dev, 718 "ASoC: CODEC was on over suspend\n"); 719 break; 720 } 721 } 722 } 723 724 for (i = 0; i < card->num_rtd; i++) { 725 726 if (card->rtd[i].dai_link->ignore_suspend) 727 continue; 728 729 snd_soc_dapm_stream_event(&card->rtd[i], 730 SNDRV_PCM_STREAM_PLAYBACK, 731 SND_SOC_DAPM_STREAM_RESUME); 732 733 snd_soc_dapm_stream_event(&card->rtd[i], 734 SNDRV_PCM_STREAM_CAPTURE, 735 SND_SOC_DAPM_STREAM_RESUME); 736 } 737 738 /* unmute any active DACs */ 739 for (i = 0; i < card->num_rtd; i++) { 740 741 if (card->rtd[i].dai_link->ignore_suspend) 742 continue; 743 744 for (j = 0; j < card->rtd[i].num_codecs; j++) { 745 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 746 struct snd_soc_dai_driver *drv = dai->driver; 747 748 if (drv->ops->digital_mute && dai->playback_active) 749 drv->ops->digital_mute(dai, 0); 750 } 751 } 752 753 for (i = 0; i < card->num_rtd; i++) { 754 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 755 756 if (card->rtd[i].dai_link->ignore_suspend) 757 continue; 758 759 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control) 760 cpu_dai->driver->resume(cpu_dai); 761 } 762 763 if (card->resume_post) 764 card->resume_post(card); 765 766 dev_dbg(card->dev, "ASoC: resume work completed\n"); 767 768 /* userspace can access us now we are back as we were before */ 769 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0); 770 771 /* Recheck all endpoints too, their state is affected by suspend */ 772 dapm_mark_endpoints_dirty(card); 773 snd_soc_dapm_sync(&card->dapm); 774 } 775 776 /* powers up audio subsystem after a suspend */ 777 int snd_soc_resume(struct device *dev) 778 { 779 struct snd_soc_card *card = dev_get_drvdata(dev); 780 bool bus_control = false; 781 int i; 782 783 /* If the card is not initialized yet there is nothing to do */ 784 if (!card->instantiated) 785 return 0; 786 787 /* activate pins from sleep state */ 788 for (i = 0; i < card->num_rtd; i++) { 789 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 790 struct snd_soc_dai **codec_dais = rtd->codec_dais; 791 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 792 int j; 793 794 if (cpu_dai->active) 795 pinctrl_pm_select_default_state(cpu_dai->dev); 796 797 for (j = 0; j < rtd->num_codecs; j++) { 798 struct snd_soc_dai *codec_dai = codec_dais[j]; 799 if (codec_dai->active) 800 pinctrl_pm_select_default_state(codec_dai->dev); 801 } 802 } 803 804 /* 805 * DAIs that also act as the control bus master might have other drivers 806 * hanging off them so need to resume immediately. Other drivers don't 807 * have that problem and may take a substantial amount of time to resume 808 * due to I/O costs and anti-pop so handle them out of line. 809 */ 810 for (i = 0; i < card->num_rtd; i++) { 811 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 812 bus_control |= cpu_dai->driver->bus_control; 813 } 814 if (bus_control) { 815 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n"); 816 soc_resume_deferred(&card->deferred_resume_work); 817 } else { 818 dev_dbg(dev, "ASoC: Scheduling resume work\n"); 819 if (!schedule_work(&card->deferred_resume_work)) 820 dev_err(dev, "ASoC: resume work item may be lost\n"); 821 } 822 823 return 0; 824 } 825 EXPORT_SYMBOL_GPL(snd_soc_resume); 826 #else 827 #define snd_soc_suspend NULL 828 #define snd_soc_resume NULL 829 #endif 830 831 static const struct snd_soc_dai_ops null_dai_ops = { 832 }; 833 834 static struct snd_soc_component *soc_find_component( 835 const struct device_node *of_node, const char *name) 836 { 837 struct snd_soc_component *component; 838 839 list_for_each_entry(component, &component_list, list) { 840 if (of_node) { 841 if (component->dev->of_node == of_node) 842 return component; 843 } else if (strcmp(component->name, name) == 0) { 844 return component; 845 } 846 } 847 848 return NULL; 849 } 850 851 static struct snd_soc_dai *snd_soc_find_dai( 852 const struct snd_soc_dai_link_component *dlc) 853 { 854 struct snd_soc_component *component; 855 struct snd_soc_dai *dai; 856 857 /* Find CPU DAI from registered DAIs*/ 858 list_for_each_entry(component, &component_list, list) { 859 if (dlc->of_node && component->dev->of_node != dlc->of_node) 860 continue; 861 if (dlc->name && strcmp(component->name, dlc->name)) 862 continue; 863 list_for_each_entry(dai, &component->dai_list, list) { 864 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)) 865 continue; 866 867 return dai; 868 } 869 } 870 871 return NULL; 872 } 873 874 static int soc_bind_dai_link(struct snd_soc_card *card, int num) 875 { 876 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 877 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 878 struct snd_soc_dai_link_component *codecs = dai_link->codecs; 879 struct snd_soc_dai_link_component cpu_dai_component; 880 struct snd_soc_dai **codec_dais = rtd->codec_dais; 881 struct snd_soc_platform *platform; 882 const char *platform_name; 883 int i; 884 885 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num); 886 887 cpu_dai_component.name = dai_link->cpu_name; 888 cpu_dai_component.of_node = dai_link->cpu_of_node; 889 cpu_dai_component.dai_name = dai_link->cpu_dai_name; 890 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component); 891 if (!rtd->cpu_dai) { 892 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n", 893 dai_link->cpu_dai_name); 894 return -EPROBE_DEFER; 895 } 896 897 rtd->num_codecs = dai_link->num_codecs; 898 899 /* Find CODEC from registered CODECs */ 900 for (i = 0; i < rtd->num_codecs; i++) { 901 codec_dais[i] = snd_soc_find_dai(&codecs[i]); 902 if (!codec_dais[i]) { 903 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n", 904 codecs[i].dai_name); 905 return -EPROBE_DEFER; 906 } 907 } 908 909 /* Single codec links expect codec and codec_dai in runtime data */ 910 rtd->codec_dai = codec_dais[0]; 911 rtd->codec = rtd->codec_dai->codec; 912 913 /* if there's no platform we match on the empty platform */ 914 platform_name = dai_link->platform_name; 915 if (!platform_name && !dai_link->platform_of_node) 916 platform_name = "snd-soc-dummy"; 917 918 /* find one from the set of registered platforms */ 919 list_for_each_entry(platform, &platform_list, list) { 920 if (dai_link->platform_of_node) { 921 if (platform->dev->of_node != 922 dai_link->platform_of_node) 923 continue; 924 } else { 925 if (strcmp(platform->component.name, platform_name)) 926 continue; 927 } 928 929 rtd->platform = platform; 930 } 931 if (!rtd->platform) { 932 dev_err(card->dev, "ASoC: platform %s not registered\n", 933 dai_link->platform_name); 934 return -EPROBE_DEFER; 935 } 936 937 card->num_rtd++; 938 939 return 0; 940 } 941 942 static void soc_remove_component(struct snd_soc_component *component) 943 { 944 if (!component->probed) 945 return; 946 947 /* This is a HACK and will be removed soon */ 948 if (component->codec) 949 list_del(&component->codec->card_list); 950 951 if (component->remove) 952 component->remove(component); 953 954 snd_soc_dapm_free(snd_soc_component_get_dapm(component)); 955 956 soc_cleanup_component_debugfs(component); 957 component->probed = 0; 958 module_put(component->dev->driver->owner); 959 } 960 961 static void soc_remove_dai(struct snd_soc_dai *dai, int order) 962 { 963 int err; 964 965 if (dai && dai->probed && 966 dai->driver->remove_order == order) { 967 if (dai->driver->remove) { 968 err = dai->driver->remove(dai); 969 if (err < 0) 970 dev_err(dai->dev, 971 "ASoC: failed to remove %s: %d\n", 972 dai->name, err); 973 } 974 dai->probed = 0; 975 } 976 } 977 978 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order) 979 { 980 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 981 int i; 982 983 /* unregister the rtd device */ 984 if (rtd->dev_registered) { 985 device_unregister(rtd->dev); 986 rtd->dev_registered = 0; 987 } 988 989 /* remove the CODEC DAI */ 990 for (i = 0; i < rtd->num_codecs; i++) 991 soc_remove_dai(rtd->codec_dais[i], order); 992 993 soc_remove_dai(rtd->cpu_dai, order); 994 } 995 996 static void soc_remove_link_components(struct snd_soc_card *card, int num, 997 int order) 998 { 999 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1000 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1001 struct snd_soc_platform *platform = rtd->platform; 1002 struct snd_soc_component *component; 1003 int i; 1004 1005 /* remove the platform */ 1006 if (platform && platform->component.driver->remove_order == order) 1007 soc_remove_component(&platform->component); 1008 1009 /* remove the CODEC-side CODEC */ 1010 for (i = 0; i < rtd->num_codecs; i++) { 1011 component = rtd->codec_dais[i]->component; 1012 if (component->driver->remove_order == order) 1013 soc_remove_component(component); 1014 } 1015 1016 /* remove any CPU-side CODEC */ 1017 if (cpu_dai) { 1018 if (cpu_dai->component->driver->remove_order == order) 1019 soc_remove_component(cpu_dai->component); 1020 } 1021 } 1022 1023 static void soc_remove_dai_links(struct snd_soc_card *card) 1024 { 1025 int dai, order; 1026 1027 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1028 order++) { 1029 for (dai = 0; dai < card->num_rtd; dai++) 1030 soc_remove_link_dais(card, dai, order); 1031 } 1032 1033 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1034 order++) { 1035 for (dai = 0; dai < card->num_rtd; dai++) 1036 soc_remove_link_components(card, dai, order); 1037 } 1038 1039 card->num_rtd = 0; 1040 } 1041 1042 static void soc_set_name_prefix(struct snd_soc_card *card, 1043 struct snd_soc_component *component) 1044 { 1045 int i; 1046 1047 if (card->codec_conf == NULL) 1048 return; 1049 1050 for (i = 0; i < card->num_configs; i++) { 1051 struct snd_soc_codec_conf *map = &card->codec_conf[i]; 1052 if (map->of_node && component->dev->of_node != map->of_node) 1053 continue; 1054 if (map->dev_name && strcmp(component->name, map->dev_name)) 1055 continue; 1056 component->name_prefix = map->name_prefix; 1057 break; 1058 } 1059 } 1060 1061 static int soc_probe_component(struct snd_soc_card *card, 1062 struct snd_soc_component *component) 1063 { 1064 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); 1065 struct snd_soc_dai *dai; 1066 int ret; 1067 1068 if (component->probed) 1069 return 0; 1070 1071 component->card = card; 1072 dapm->card = card; 1073 soc_set_name_prefix(card, component); 1074 1075 if (!try_module_get(component->dev->driver->owner)) 1076 return -ENODEV; 1077 1078 soc_init_component_debugfs(component); 1079 1080 if (component->dapm_widgets) { 1081 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets, 1082 component->num_dapm_widgets); 1083 1084 if (ret != 0) { 1085 dev_err(component->dev, 1086 "Failed to create new controls %d\n", ret); 1087 goto err_probe; 1088 } 1089 } 1090 1091 list_for_each_entry(dai, &component->dai_list, list) { 1092 ret = snd_soc_dapm_new_dai_widgets(dapm, dai); 1093 if (ret != 0) { 1094 dev_err(component->dev, 1095 "Failed to create DAI widgets %d\n", ret); 1096 goto err_probe; 1097 } 1098 } 1099 1100 if (component->probe) { 1101 ret = component->probe(component); 1102 if (ret < 0) { 1103 dev_err(component->dev, 1104 "ASoC: failed to probe component %d\n", ret); 1105 goto err_probe; 1106 } 1107 1108 WARN(dapm->idle_bias_off && 1109 dapm->bias_level != SND_SOC_BIAS_OFF, 1110 "codec %s can not start from non-off bias with idle_bias_off==1\n", 1111 component->name); 1112 } 1113 1114 if (component->controls) 1115 snd_soc_add_component_controls(component, component->controls, 1116 component->num_controls); 1117 if (component->dapm_routes) 1118 snd_soc_dapm_add_routes(dapm, component->dapm_routes, 1119 component->num_dapm_routes); 1120 1121 component->probed = 1; 1122 list_add(&dapm->list, &card->dapm_list); 1123 1124 /* This is a HACK and will be removed soon */ 1125 if (component->codec) 1126 list_add(&component->codec->card_list, &card->codec_dev_list); 1127 1128 return 0; 1129 1130 err_probe: 1131 soc_cleanup_component_debugfs(component); 1132 module_put(component->dev->driver->owner); 1133 1134 return ret; 1135 } 1136 1137 static void rtd_release(struct device *dev) 1138 { 1139 kfree(dev); 1140 } 1141 1142 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd, 1143 const char *name) 1144 { 1145 int ret = 0; 1146 1147 /* register the rtd device */ 1148 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL); 1149 if (!rtd->dev) 1150 return -ENOMEM; 1151 device_initialize(rtd->dev); 1152 rtd->dev->parent = rtd->card->dev; 1153 rtd->dev->release = rtd_release; 1154 rtd->dev->groups = soc_dev_attr_groups; 1155 dev_set_name(rtd->dev, "%s", name); 1156 dev_set_drvdata(rtd->dev, rtd); 1157 mutex_init(&rtd->pcm_mutex); 1158 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients); 1159 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients); 1160 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients); 1161 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients); 1162 ret = device_add(rtd->dev); 1163 if (ret < 0) { 1164 /* calling put_device() here to free the rtd->dev */ 1165 put_device(rtd->dev); 1166 dev_err(rtd->card->dev, 1167 "ASoC: failed to register runtime device: %d\n", ret); 1168 return ret; 1169 } 1170 rtd->dev_registered = 1; 1171 return 0; 1172 } 1173 1174 static int soc_probe_link_components(struct snd_soc_card *card, int num, 1175 int order) 1176 { 1177 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1178 struct snd_soc_platform *platform = rtd->platform; 1179 struct snd_soc_component *component; 1180 int i, ret; 1181 1182 /* probe the CPU-side component, if it is a CODEC */ 1183 component = rtd->cpu_dai->component; 1184 if (component->driver->probe_order == order) { 1185 ret = soc_probe_component(card, component); 1186 if (ret < 0) 1187 return ret; 1188 } 1189 1190 /* probe the CODEC-side components */ 1191 for (i = 0; i < rtd->num_codecs; i++) { 1192 component = rtd->codec_dais[i]->component; 1193 if (component->driver->probe_order == order) { 1194 ret = soc_probe_component(card, component); 1195 if (ret < 0) 1196 return ret; 1197 } 1198 } 1199 1200 /* probe the platform */ 1201 if (platform->component.driver->probe_order == order) { 1202 ret = soc_probe_component(card, &platform->component); 1203 if (ret < 0) 1204 return ret; 1205 } 1206 1207 return 0; 1208 } 1209 1210 static int soc_probe_dai(struct snd_soc_dai *dai, int order) 1211 { 1212 int ret; 1213 1214 if (!dai->probed && dai->driver->probe_order == order) { 1215 if (dai->driver->probe) { 1216 ret = dai->driver->probe(dai); 1217 if (ret < 0) { 1218 dev_err(dai->dev, 1219 "ASoC: failed to probe DAI %s: %d\n", 1220 dai->name, ret); 1221 return ret; 1222 } 1223 } 1224 1225 dai->probed = 1; 1226 } 1227 1228 return 0; 1229 } 1230 1231 static int soc_link_dai_widgets(struct snd_soc_card *card, 1232 struct snd_soc_dai_link *dai_link, 1233 struct snd_soc_pcm_runtime *rtd) 1234 { 1235 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1236 struct snd_soc_dai *codec_dai = rtd->codec_dai; 1237 struct snd_soc_dapm_widget *play_w, *capture_w; 1238 int ret; 1239 1240 if (rtd->num_codecs > 1) 1241 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n"); 1242 1243 /* link the DAI widgets */ 1244 play_w = codec_dai->playback_widget; 1245 capture_w = cpu_dai->capture_widget; 1246 if (play_w && capture_w) { 1247 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1248 capture_w, play_w); 1249 if (ret != 0) { 1250 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1251 play_w->name, capture_w->name, ret); 1252 return ret; 1253 } 1254 } 1255 1256 play_w = cpu_dai->playback_widget; 1257 capture_w = codec_dai->capture_widget; 1258 if (play_w && capture_w) { 1259 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1260 capture_w, play_w); 1261 if (ret != 0) { 1262 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1263 play_w->name, capture_w->name, ret); 1264 return ret; 1265 } 1266 } 1267 1268 return 0; 1269 } 1270 1271 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order) 1272 { 1273 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 1274 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1275 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1276 int i, ret; 1277 1278 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n", 1279 card->name, num, order); 1280 1281 /* set default power off timeout */ 1282 rtd->pmdown_time = pmdown_time; 1283 1284 ret = soc_probe_dai(cpu_dai, order); 1285 if (ret) 1286 return ret; 1287 1288 /* probe the CODEC DAI */ 1289 for (i = 0; i < rtd->num_codecs; i++) { 1290 ret = soc_probe_dai(rtd->codec_dais[i], order); 1291 if (ret) 1292 return ret; 1293 } 1294 1295 /* complete DAI probe during last probe */ 1296 if (order != SND_SOC_COMP_ORDER_LAST) 1297 return 0; 1298 1299 /* do machine specific initialization */ 1300 if (dai_link->init) { 1301 ret = dai_link->init(rtd); 1302 if (ret < 0) { 1303 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1304 dai_link->name, ret); 1305 return ret; 1306 } 1307 } 1308 1309 ret = soc_post_component_init(rtd, dai_link->name); 1310 if (ret) 1311 return ret; 1312 1313 #ifdef CONFIG_DEBUG_FS 1314 /* add DPCM sysfs entries */ 1315 if (dai_link->dynamic) { 1316 ret = soc_dpcm_debugfs_add(rtd); 1317 if (ret < 0) { 1318 dev_err(rtd->dev, 1319 "ASoC: failed to add dpcm sysfs entries: %d\n", 1320 ret); 1321 return ret; 1322 } 1323 } 1324 #endif 1325 1326 if (cpu_dai->driver->compress_dai) { 1327 /*create compress_device"*/ 1328 ret = soc_new_compress(rtd, num); 1329 if (ret < 0) { 1330 dev_err(card->dev, "ASoC: can't create compress %s\n", 1331 dai_link->stream_name); 1332 return ret; 1333 } 1334 } else { 1335 1336 if (!dai_link->params) { 1337 /* create the pcm */ 1338 ret = soc_new_pcm(rtd, num); 1339 if (ret < 0) { 1340 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n", 1341 dai_link->stream_name, ret); 1342 return ret; 1343 } 1344 } else { 1345 INIT_DELAYED_WORK(&rtd->delayed_work, 1346 codec2codec_close_delayed_work); 1347 1348 /* link the DAI widgets */ 1349 ret = soc_link_dai_widgets(card, dai_link, rtd); 1350 if (ret) 1351 return ret; 1352 } 1353 } 1354 1355 return 0; 1356 } 1357 1358 static int soc_bind_aux_dev(struct snd_soc_card *card, int num) 1359 { 1360 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1361 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1362 const char *name = aux_dev->codec_name; 1363 1364 rtd->component = soc_find_component(aux_dev->codec_of_node, name); 1365 if (!rtd->component) { 1366 if (aux_dev->codec_of_node) 1367 name = of_node_full_name(aux_dev->codec_of_node); 1368 1369 dev_err(card->dev, "ASoC: %s not registered\n", name); 1370 return -EPROBE_DEFER; 1371 } 1372 1373 /* 1374 * Some places still reference rtd->codec, so we have to keep that 1375 * initialized if the component is a CODEC. Once all those references 1376 * have been removed, this code can be removed as well. 1377 */ 1378 rtd->codec = rtd->component->codec; 1379 1380 return 0; 1381 } 1382 1383 static int soc_probe_aux_dev(struct snd_soc_card *card, int num) 1384 { 1385 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1386 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1387 int ret; 1388 1389 ret = soc_probe_component(card, rtd->component); 1390 if (ret < 0) 1391 return ret; 1392 1393 /* do machine specific initialization */ 1394 if (aux_dev->init) { 1395 ret = aux_dev->init(rtd->component); 1396 if (ret < 0) { 1397 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1398 aux_dev->name, ret); 1399 return ret; 1400 } 1401 } 1402 1403 return soc_post_component_init(rtd, aux_dev->name); 1404 } 1405 1406 static void soc_remove_aux_dev(struct snd_soc_card *card, int num) 1407 { 1408 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1409 struct snd_soc_component *component = rtd->component; 1410 1411 /* unregister the rtd device */ 1412 if (rtd->dev_registered) { 1413 device_remove_file(rtd->dev, &dev_attr_codec_reg); 1414 device_unregister(rtd->dev); 1415 rtd->dev_registered = 0; 1416 } 1417 1418 if (component && component->probed) 1419 soc_remove_component(component); 1420 } 1421 1422 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec) 1423 { 1424 int ret; 1425 1426 if (codec->cache_init) 1427 return 0; 1428 1429 ret = snd_soc_cache_init(codec); 1430 if (ret < 0) { 1431 dev_err(codec->dev, 1432 "ASoC: Failed to set cache compression type: %d\n", 1433 ret); 1434 return ret; 1435 } 1436 codec->cache_init = 1; 1437 return 0; 1438 } 1439 1440 /** 1441 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime 1442 * @rtd: The runtime for which the DAI link format should be changed 1443 * @dai_fmt: The new DAI link format 1444 * 1445 * This function updates the DAI link format for all DAIs connected to the DAI 1446 * link for the specified runtime. 1447 * 1448 * Note: For setups with a static format set the dai_fmt field in the 1449 * corresponding snd_dai_link struct instead of using this function. 1450 * 1451 * Returns 0 on success, otherwise a negative error code. 1452 */ 1453 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd, 1454 unsigned int dai_fmt) 1455 { 1456 struct snd_soc_dai **codec_dais = rtd->codec_dais; 1457 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1458 unsigned int i; 1459 int ret; 1460 1461 for (i = 0; i < rtd->num_codecs; i++) { 1462 struct snd_soc_dai *codec_dai = codec_dais[i]; 1463 1464 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt); 1465 if (ret != 0 && ret != -ENOTSUPP) { 1466 dev_warn(codec_dai->dev, 1467 "ASoC: Failed to set DAI format: %d\n", ret); 1468 return ret; 1469 } 1470 } 1471 1472 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */ 1473 if (cpu_dai->codec) { 1474 unsigned int inv_dai_fmt; 1475 1476 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK; 1477 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { 1478 case SND_SOC_DAIFMT_CBM_CFM: 1479 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; 1480 break; 1481 case SND_SOC_DAIFMT_CBM_CFS: 1482 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM; 1483 break; 1484 case SND_SOC_DAIFMT_CBS_CFM: 1485 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS; 1486 break; 1487 case SND_SOC_DAIFMT_CBS_CFS: 1488 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM; 1489 break; 1490 } 1491 1492 dai_fmt = inv_dai_fmt; 1493 } 1494 1495 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt); 1496 if (ret != 0 && ret != -ENOTSUPP) { 1497 dev_warn(cpu_dai->dev, 1498 "ASoC: Failed to set DAI format: %d\n", ret); 1499 return ret; 1500 } 1501 1502 return 0; 1503 } 1504 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt); 1505 1506 static int snd_soc_instantiate_card(struct snd_soc_card *card) 1507 { 1508 struct snd_soc_codec *codec; 1509 int ret, i, order; 1510 1511 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT); 1512 1513 /* bind DAIs */ 1514 for (i = 0; i < card->num_links; i++) { 1515 ret = soc_bind_dai_link(card, i); 1516 if (ret != 0) 1517 goto base_error; 1518 } 1519 1520 /* bind aux_devs too */ 1521 for (i = 0; i < card->num_aux_devs; i++) { 1522 ret = soc_bind_aux_dev(card, i); 1523 if (ret != 0) 1524 goto base_error; 1525 } 1526 1527 /* initialize the register cache for each available codec */ 1528 list_for_each_entry(codec, &codec_list, list) { 1529 if (codec->cache_init) 1530 continue; 1531 ret = snd_soc_init_codec_cache(codec); 1532 if (ret < 0) 1533 goto base_error; 1534 } 1535 1536 /* card bind complete so register a sound card */ 1537 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 1538 card->owner, 0, &card->snd_card); 1539 if (ret < 0) { 1540 dev_err(card->dev, 1541 "ASoC: can't create sound card for card %s: %d\n", 1542 card->name, ret); 1543 goto base_error; 1544 } 1545 1546 card->dapm.bias_level = SND_SOC_BIAS_OFF; 1547 card->dapm.dev = card->dev; 1548 card->dapm.card = card; 1549 list_add(&card->dapm.list, &card->dapm_list); 1550 1551 #ifdef CONFIG_DEBUG_FS 1552 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root); 1553 #endif 1554 1555 #ifdef CONFIG_PM_SLEEP 1556 /* deferred resume work */ 1557 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); 1558 #endif 1559 1560 if (card->dapm_widgets) 1561 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, 1562 card->num_dapm_widgets); 1563 1564 /* initialise the sound card only once */ 1565 if (card->probe) { 1566 ret = card->probe(card); 1567 if (ret < 0) 1568 goto card_probe_error; 1569 } 1570 1571 /* probe all components used by DAI links on this card */ 1572 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1573 order++) { 1574 for (i = 0; i < card->num_links; i++) { 1575 ret = soc_probe_link_components(card, i, order); 1576 if (ret < 0) { 1577 dev_err(card->dev, 1578 "ASoC: failed to instantiate card %d\n", 1579 ret); 1580 goto probe_dai_err; 1581 } 1582 } 1583 } 1584 1585 /* probe all DAI links on this card */ 1586 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1587 order++) { 1588 for (i = 0; i < card->num_links; i++) { 1589 ret = soc_probe_link_dais(card, i, order); 1590 if (ret < 0) { 1591 dev_err(card->dev, 1592 "ASoC: failed to instantiate card %d\n", 1593 ret); 1594 goto probe_dai_err; 1595 } 1596 } 1597 } 1598 1599 for (i = 0; i < card->num_aux_devs; i++) { 1600 ret = soc_probe_aux_dev(card, i); 1601 if (ret < 0) { 1602 dev_err(card->dev, 1603 "ASoC: failed to add auxiliary devices %d\n", 1604 ret); 1605 goto probe_aux_dev_err; 1606 } 1607 } 1608 1609 snd_soc_dapm_link_dai_widgets(card); 1610 snd_soc_dapm_connect_dai_link_widgets(card); 1611 1612 if (card->controls) 1613 snd_soc_add_card_controls(card, card->controls, card->num_controls); 1614 1615 if (card->dapm_routes) 1616 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes, 1617 card->num_dapm_routes); 1618 1619 for (i = 0; i < card->num_links; i++) { 1620 if (card->dai_link[i].dai_fmt) 1621 snd_soc_runtime_set_dai_fmt(&card->rtd[i], 1622 card->dai_link[i].dai_fmt); 1623 } 1624 1625 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname), 1626 "%s", card->name); 1627 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname), 1628 "%s", card->long_name ? card->long_name : card->name); 1629 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver), 1630 "%s", card->driver_name ? card->driver_name : card->name); 1631 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) { 1632 switch (card->snd_card->driver[i]) { 1633 case '_': 1634 case '-': 1635 case '\0': 1636 break; 1637 default: 1638 if (!isalnum(card->snd_card->driver[i])) 1639 card->snd_card->driver[i] = '_'; 1640 break; 1641 } 1642 } 1643 1644 if (card->late_probe) { 1645 ret = card->late_probe(card); 1646 if (ret < 0) { 1647 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n", 1648 card->name, ret); 1649 goto probe_aux_dev_err; 1650 } 1651 } 1652 1653 snd_soc_dapm_new_widgets(card); 1654 1655 ret = snd_card_register(card->snd_card); 1656 if (ret < 0) { 1657 dev_err(card->dev, "ASoC: failed to register soundcard %d\n", 1658 ret); 1659 goto probe_aux_dev_err; 1660 } 1661 1662 card->instantiated = 1; 1663 snd_soc_dapm_sync(&card->dapm); 1664 mutex_unlock(&card->mutex); 1665 1666 return 0; 1667 1668 probe_aux_dev_err: 1669 for (i = 0; i < card->num_aux_devs; i++) 1670 soc_remove_aux_dev(card, i); 1671 1672 probe_dai_err: 1673 soc_remove_dai_links(card); 1674 1675 card_probe_error: 1676 if (card->remove) 1677 card->remove(card); 1678 1679 snd_card_free(card->snd_card); 1680 1681 base_error: 1682 mutex_unlock(&card->mutex); 1683 1684 return ret; 1685 } 1686 1687 /* probes a new socdev */ 1688 static int soc_probe(struct platform_device *pdev) 1689 { 1690 struct snd_soc_card *card = platform_get_drvdata(pdev); 1691 1692 /* 1693 * no card, so machine driver should be registering card 1694 * we should not be here in that case so ret error 1695 */ 1696 if (!card) 1697 return -EINVAL; 1698 1699 dev_warn(&pdev->dev, 1700 "ASoC: machine %s should use snd_soc_register_card()\n", 1701 card->name); 1702 1703 /* Bodge while we unpick instantiation */ 1704 card->dev = &pdev->dev; 1705 1706 return snd_soc_register_card(card); 1707 } 1708 1709 static int soc_cleanup_card_resources(struct snd_soc_card *card) 1710 { 1711 int i; 1712 1713 /* make sure any delayed work runs */ 1714 for (i = 0; i < card->num_rtd; i++) { 1715 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1716 flush_delayed_work(&rtd->delayed_work); 1717 } 1718 1719 /* remove auxiliary devices */ 1720 for (i = 0; i < card->num_aux_devs; i++) 1721 soc_remove_aux_dev(card, i); 1722 1723 /* remove and free each DAI */ 1724 soc_remove_dai_links(card); 1725 1726 soc_cleanup_card_debugfs(card); 1727 1728 /* remove the card */ 1729 if (card->remove) 1730 card->remove(card); 1731 1732 snd_soc_dapm_free(&card->dapm); 1733 1734 snd_card_free(card->snd_card); 1735 return 0; 1736 1737 } 1738 1739 /* removes a socdev */ 1740 static int soc_remove(struct platform_device *pdev) 1741 { 1742 struct snd_soc_card *card = platform_get_drvdata(pdev); 1743 1744 snd_soc_unregister_card(card); 1745 return 0; 1746 } 1747 1748 int snd_soc_poweroff(struct device *dev) 1749 { 1750 struct snd_soc_card *card = dev_get_drvdata(dev); 1751 int i; 1752 1753 if (!card->instantiated) 1754 return 0; 1755 1756 /* Flush out pmdown_time work - we actually do want to run it 1757 * now, we're shutting down so no imminent restart. */ 1758 for (i = 0; i < card->num_rtd; i++) { 1759 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1760 flush_delayed_work(&rtd->delayed_work); 1761 } 1762 1763 snd_soc_dapm_shutdown(card); 1764 1765 /* deactivate pins to sleep state */ 1766 for (i = 0; i < card->num_rtd; i++) { 1767 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1768 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1769 int j; 1770 1771 pinctrl_pm_select_sleep_state(cpu_dai->dev); 1772 for (j = 0; j < rtd->num_codecs; j++) { 1773 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 1774 pinctrl_pm_select_sleep_state(codec_dai->dev); 1775 } 1776 } 1777 1778 return 0; 1779 } 1780 EXPORT_SYMBOL_GPL(snd_soc_poweroff); 1781 1782 const struct dev_pm_ops snd_soc_pm_ops = { 1783 .suspend = snd_soc_suspend, 1784 .resume = snd_soc_resume, 1785 .freeze = snd_soc_suspend, 1786 .thaw = snd_soc_resume, 1787 .poweroff = snd_soc_poweroff, 1788 .restore = snd_soc_resume, 1789 }; 1790 EXPORT_SYMBOL_GPL(snd_soc_pm_ops); 1791 1792 /* ASoC platform driver */ 1793 static struct platform_driver soc_driver = { 1794 .driver = { 1795 .name = "soc-audio", 1796 .pm = &snd_soc_pm_ops, 1797 }, 1798 .probe = soc_probe, 1799 .remove = soc_remove, 1800 }; 1801 1802 /** 1803 * snd_soc_cnew - create new control 1804 * @_template: control template 1805 * @data: control private data 1806 * @long_name: control long name 1807 * @prefix: control name prefix 1808 * 1809 * Create a new mixer control from a template control. 1810 * 1811 * Returns 0 for success, else error. 1812 */ 1813 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, 1814 void *data, const char *long_name, 1815 const char *prefix) 1816 { 1817 struct snd_kcontrol_new template; 1818 struct snd_kcontrol *kcontrol; 1819 char *name = NULL; 1820 1821 memcpy(&template, _template, sizeof(template)); 1822 template.index = 0; 1823 1824 if (!long_name) 1825 long_name = template.name; 1826 1827 if (prefix) { 1828 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name); 1829 if (!name) 1830 return NULL; 1831 1832 template.name = name; 1833 } else { 1834 template.name = long_name; 1835 } 1836 1837 kcontrol = snd_ctl_new1(&template, data); 1838 1839 kfree(name); 1840 1841 return kcontrol; 1842 } 1843 EXPORT_SYMBOL_GPL(snd_soc_cnew); 1844 1845 static int snd_soc_add_controls(struct snd_card *card, struct device *dev, 1846 const struct snd_kcontrol_new *controls, int num_controls, 1847 const char *prefix, void *data) 1848 { 1849 int err, i; 1850 1851 for (i = 0; i < num_controls; i++) { 1852 const struct snd_kcontrol_new *control = &controls[i]; 1853 err = snd_ctl_add(card, snd_soc_cnew(control, data, 1854 control->name, prefix)); 1855 if (err < 0) { 1856 dev_err(dev, "ASoC: Failed to add %s: %d\n", 1857 control->name, err); 1858 return err; 1859 } 1860 } 1861 1862 return 0; 1863 } 1864 1865 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card, 1866 const char *name) 1867 { 1868 struct snd_card *card = soc_card->snd_card; 1869 struct snd_kcontrol *kctl; 1870 1871 if (unlikely(!name)) 1872 return NULL; 1873 1874 list_for_each_entry(kctl, &card->controls, list) 1875 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) 1876 return kctl; 1877 return NULL; 1878 } 1879 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol); 1880 1881 /** 1882 * snd_soc_add_component_controls - Add an array of controls to a component. 1883 * 1884 * @component: Component 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_component_controls(struct snd_soc_component *component, 1891 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1892 { 1893 struct snd_card *card = component->card->snd_card; 1894 1895 return snd_soc_add_controls(card, component->dev, controls, 1896 num_controls, component->name_prefix, component); 1897 } 1898 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls); 1899 1900 /** 1901 * snd_soc_add_codec_controls - add an array of controls to a codec. 1902 * Convenience function to add a list of controls. Many codecs were 1903 * duplicating this code. 1904 * 1905 * @codec: codec to add controls to 1906 * @controls: array of controls to add 1907 * @num_controls: number of elements in the array 1908 * 1909 * Return 0 for success, else error. 1910 */ 1911 int snd_soc_add_codec_controls(struct snd_soc_codec *codec, 1912 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1913 { 1914 return snd_soc_add_component_controls(&codec->component, controls, 1915 num_controls); 1916 } 1917 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls); 1918 1919 /** 1920 * snd_soc_add_platform_controls - add an array of controls to a platform. 1921 * Convenience function to add a list of controls. 1922 * 1923 * @platform: platform to add controls to 1924 * @controls: array of controls to add 1925 * @num_controls: number of elements in the array 1926 * 1927 * Return 0 for success, else error. 1928 */ 1929 int snd_soc_add_platform_controls(struct snd_soc_platform *platform, 1930 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1931 { 1932 return snd_soc_add_component_controls(&platform->component, controls, 1933 num_controls); 1934 } 1935 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls); 1936 1937 /** 1938 * snd_soc_add_card_controls - add an array of controls to a SoC card. 1939 * Convenience function to add a list of controls. 1940 * 1941 * @soc_card: SoC card to add controls to 1942 * @controls: array of controls to add 1943 * @num_controls: number of elements in the array 1944 * 1945 * Return 0 for success, else error. 1946 */ 1947 int snd_soc_add_card_controls(struct snd_soc_card *soc_card, 1948 const struct snd_kcontrol_new *controls, int num_controls) 1949 { 1950 struct snd_card *card = soc_card->snd_card; 1951 1952 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls, 1953 NULL, soc_card); 1954 } 1955 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls); 1956 1957 /** 1958 * snd_soc_add_dai_controls - add an array of controls to a DAI. 1959 * Convienience function to add a list of controls. 1960 * 1961 * @dai: DAI to add controls to 1962 * @controls: array of controls to add 1963 * @num_controls: number of elements in the array 1964 * 1965 * Return 0 for success, else error. 1966 */ 1967 int snd_soc_add_dai_controls(struct snd_soc_dai *dai, 1968 const struct snd_kcontrol_new *controls, int num_controls) 1969 { 1970 struct snd_card *card = dai->component->card->snd_card; 1971 1972 return snd_soc_add_controls(card, dai->dev, controls, num_controls, 1973 NULL, dai); 1974 } 1975 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls); 1976 1977 /** 1978 * snd_soc_dai_set_sysclk - configure DAI system or master clock. 1979 * @dai: DAI 1980 * @clk_id: DAI specific clock ID 1981 * @freq: new clock frequency in Hz 1982 * @dir: new clock direction - input/output. 1983 * 1984 * Configures the DAI master (MCLK) or system (SYSCLK) clocking. 1985 */ 1986 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, 1987 unsigned int freq, int dir) 1988 { 1989 if (dai->driver && dai->driver->ops->set_sysclk) 1990 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir); 1991 else if (dai->codec && dai->codec->driver->set_sysclk) 1992 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0, 1993 freq, dir); 1994 else 1995 return -ENOTSUPP; 1996 } 1997 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); 1998 1999 /** 2000 * snd_soc_codec_set_sysclk - configure CODEC system or master clock. 2001 * @codec: CODEC 2002 * @clk_id: DAI specific clock ID 2003 * @source: Source for the clock 2004 * @freq: new clock frequency in Hz 2005 * @dir: new clock direction - input/output. 2006 * 2007 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking. 2008 */ 2009 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id, 2010 int source, unsigned int freq, int dir) 2011 { 2012 if (codec->driver->set_sysclk) 2013 return codec->driver->set_sysclk(codec, clk_id, source, 2014 freq, dir); 2015 else 2016 return -ENOTSUPP; 2017 } 2018 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk); 2019 2020 /** 2021 * snd_soc_dai_set_clkdiv - configure DAI clock dividers. 2022 * @dai: DAI 2023 * @div_id: DAI specific clock divider ID 2024 * @div: new clock divisor. 2025 * 2026 * Configures the clock dividers. This is used to derive the best DAI bit and 2027 * frame clocks from the system or master clock. It's best to set the DAI bit 2028 * and frame clocks as low as possible to save system power. 2029 */ 2030 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, 2031 int div_id, int div) 2032 { 2033 if (dai->driver && dai->driver->ops->set_clkdiv) 2034 return dai->driver->ops->set_clkdiv(dai, div_id, div); 2035 else 2036 return -EINVAL; 2037 } 2038 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); 2039 2040 /** 2041 * snd_soc_dai_set_pll - configure DAI PLL. 2042 * @dai: DAI 2043 * @pll_id: DAI specific PLL ID 2044 * @source: DAI specific source for the PLL 2045 * @freq_in: PLL input clock frequency in Hz 2046 * @freq_out: requested PLL output clock frequency in Hz 2047 * 2048 * Configures and enables PLL to generate output clock based on input clock. 2049 */ 2050 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source, 2051 unsigned int freq_in, unsigned int freq_out) 2052 { 2053 if (dai->driver && dai->driver->ops->set_pll) 2054 return dai->driver->ops->set_pll(dai, pll_id, source, 2055 freq_in, freq_out); 2056 else if (dai->codec && dai->codec->driver->set_pll) 2057 return dai->codec->driver->set_pll(dai->codec, pll_id, source, 2058 freq_in, freq_out); 2059 else 2060 return -EINVAL; 2061 } 2062 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); 2063 2064 /* 2065 * snd_soc_codec_set_pll - configure codec PLL. 2066 * @codec: CODEC 2067 * @pll_id: DAI specific PLL ID 2068 * @source: DAI specific source for the PLL 2069 * @freq_in: PLL input clock frequency in Hz 2070 * @freq_out: requested PLL output clock frequency in Hz 2071 * 2072 * Configures and enables PLL to generate output clock based on input clock. 2073 */ 2074 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source, 2075 unsigned int freq_in, unsigned int freq_out) 2076 { 2077 if (codec->driver->set_pll) 2078 return codec->driver->set_pll(codec, pll_id, source, 2079 freq_in, freq_out); 2080 else 2081 return -EINVAL; 2082 } 2083 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll); 2084 2085 /** 2086 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio. 2087 * @dai: DAI 2088 * @ratio Ratio of BCLK to Sample rate. 2089 * 2090 * Configures the DAI for a preset BCLK to sample rate ratio. 2091 */ 2092 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio) 2093 { 2094 if (dai->driver && dai->driver->ops->set_bclk_ratio) 2095 return dai->driver->ops->set_bclk_ratio(dai, ratio); 2096 else 2097 return -EINVAL; 2098 } 2099 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio); 2100 2101 /** 2102 * snd_soc_dai_set_fmt - configure DAI hardware audio format. 2103 * @dai: DAI 2104 * @fmt: SND_SOC_DAIFMT_ format value. 2105 * 2106 * Configures the DAI hardware format and clocking. 2107 */ 2108 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 2109 { 2110 if (dai->driver == NULL) 2111 return -EINVAL; 2112 if (dai->driver->ops->set_fmt == NULL) 2113 return -ENOTSUPP; 2114 return dai->driver->ops->set_fmt(dai, fmt); 2115 } 2116 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); 2117 2118 /** 2119 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask. 2120 * @slots: Number of slots in use. 2121 * @tx_mask: bitmask representing active TX slots. 2122 * @rx_mask: bitmask representing active RX slots. 2123 * 2124 * Generates the TDM tx and rx slot default masks for DAI. 2125 */ 2126 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots, 2127 unsigned int *tx_mask, 2128 unsigned int *rx_mask) 2129 { 2130 if (*tx_mask || *rx_mask) 2131 return 0; 2132 2133 if (!slots) 2134 return -EINVAL; 2135 2136 *tx_mask = (1 << slots) - 1; 2137 *rx_mask = (1 << slots) - 1; 2138 2139 return 0; 2140 } 2141 2142 /** 2143 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation 2144 * @dai: The DAI to configure 2145 * @tx_mask: bitmask representing active TX slots. 2146 * @rx_mask: bitmask representing active RX slots. 2147 * @slots: Number of slots in use. 2148 * @slot_width: Width in bits for each slot. 2149 * 2150 * This function configures the specified DAI for TDM operation. @slot contains 2151 * the total number of slots of the TDM stream and @slot_with the width of each 2152 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the 2153 * active slots of the TDM stream for the specified DAI, i.e. which slots the 2154 * DAI should write to or read from. If a bit is set the corresponding slot is 2155 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to 2156 * the first slot, bit 1 to the second slot and so on. The first active slot 2157 * maps to the first channel of the DAI, the second active slot to the second 2158 * channel and so on. 2159 * 2160 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask, 2161 * @rx_mask and @slot_width will be ignored. 2162 * 2163 * Returns 0 on success, a negative error code otherwise. 2164 */ 2165 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, 2166 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) 2167 { 2168 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask) 2169 dai->driver->ops->xlate_tdm_slot_mask(slots, 2170 &tx_mask, &rx_mask); 2171 else 2172 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask); 2173 2174 dai->tx_mask = tx_mask; 2175 dai->rx_mask = rx_mask; 2176 2177 if (dai->driver && dai->driver->ops->set_tdm_slot) 2178 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask, 2179 slots, slot_width); 2180 else 2181 return -ENOTSUPP; 2182 } 2183 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); 2184 2185 /** 2186 * snd_soc_dai_set_channel_map - configure DAI audio channel map 2187 * @dai: DAI 2188 * @tx_num: how many TX channels 2189 * @tx_slot: pointer to an array which imply the TX slot number channel 2190 * 0~num-1 uses 2191 * @rx_num: how many RX channels 2192 * @rx_slot: pointer to an array which imply the RX slot number channel 2193 * 0~num-1 uses 2194 * 2195 * configure the relationship between channel number and TDM slot number. 2196 */ 2197 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai, 2198 unsigned int tx_num, unsigned int *tx_slot, 2199 unsigned int rx_num, unsigned int *rx_slot) 2200 { 2201 if (dai->driver && dai->driver->ops->set_channel_map) 2202 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot, 2203 rx_num, rx_slot); 2204 else 2205 return -EINVAL; 2206 } 2207 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map); 2208 2209 /** 2210 * snd_soc_dai_set_tristate - configure DAI system or master clock. 2211 * @dai: DAI 2212 * @tristate: tristate enable 2213 * 2214 * Tristates the DAI so that others can use it. 2215 */ 2216 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) 2217 { 2218 if (dai->driver && dai->driver->ops->set_tristate) 2219 return dai->driver->ops->set_tristate(dai, tristate); 2220 else 2221 return -EINVAL; 2222 } 2223 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); 2224 2225 /** 2226 * snd_soc_dai_digital_mute - configure DAI system or master clock. 2227 * @dai: DAI 2228 * @mute: mute enable 2229 * @direction: stream to mute 2230 * 2231 * Mutes the DAI DAC. 2232 */ 2233 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute, 2234 int direction) 2235 { 2236 if (!dai->driver) 2237 return -ENOTSUPP; 2238 2239 if (dai->driver->ops->mute_stream) 2240 return dai->driver->ops->mute_stream(dai, mute, direction); 2241 else if (direction == SNDRV_PCM_STREAM_PLAYBACK && 2242 dai->driver->ops->digital_mute) 2243 return dai->driver->ops->digital_mute(dai, mute); 2244 else 2245 return -ENOTSUPP; 2246 } 2247 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); 2248 2249 static int snd_soc_init_multicodec(struct snd_soc_card *card, 2250 struct snd_soc_dai_link *dai_link) 2251 { 2252 /* Legacy codec/codec_dai link is a single entry in multicodec */ 2253 if (dai_link->codec_name || dai_link->codec_of_node || 2254 dai_link->codec_dai_name) { 2255 dai_link->num_codecs = 1; 2256 2257 dai_link->codecs = devm_kzalloc(card->dev, 2258 sizeof(struct snd_soc_dai_link_component), 2259 GFP_KERNEL); 2260 if (!dai_link->codecs) 2261 return -ENOMEM; 2262 2263 dai_link->codecs[0].name = dai_link->codec_name; 2264 dai_link->codecs[0].of_node = dai_link->codec_of_node; 2265 dai_link->codecs[0].dai_name = dai_link->codec_dai_name; 2266 } 2267 2268 if (!dai_link->codecs) { 2269 dev_err(card->dev, "ASoC: DAI link has no CODECs\n"); 2270 return -EINVAL; 2271 } 2272 2273 return 0; 2274 } 2275 2276 /** 2277 * snd_soc_register_card - Register a card with the ASoC core 2278 * 2279 * @card: Card to register 2280 * 2281 */ 2282 int snd_soc_register_card(struct snd_soc_card *card) 2283 { 2284 int i, j, ret; 2285 2286 if (!card->name || !card->dev) 2287 return -EINVAL; 2288 2289 for (i = 0; i < card->num_links; i++) { 2290 struct snd_soc_dai_link *link = &card->dai_link[i]; 2291 2292 ret = snd_soc_init_multicodec(card, link); 2293 if (ret) { 2294 dev_err(card->dev, "ASoC: failed to init multicodec\n"); 2295 return ret; 2296 } 2297 2298 for (j = 0; j < link->num_codecs; j++) { 2299 /* 2300 * Codec must be specified by 1 of name or OF node, 2301 * not both or neither. 2302 */ 2303 if (!!link->codecs[j].name == 2304 !!link->codecs[j].of_node) { 2305 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n", 2306 link->name); 2307 return -EINVAL; 2308 } 2309 /* Codec DAI name must be specified */ 2310 if (!link->codecs[j].dai_name) { 2311 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n", 2312 link->name); 2313 return -EINVAL; 2314 } 2315 } 2316 2317 /* 2318 * Platform may be specified by either name or OF node, but 2319 * can be left unspecified, and a dummy platform will be used. 2320 */ 2321 if (link->platform_name && link->platform_of_node) { 2322 dev_err(card->dev, 2323 "ASoC: Both platform name/of_node are set for %s\n", 2324 link->name); 2325 return -EINVAL; 2326 } 2327 2328 /* 2329 * CPU device may be specified by either name or OF node, but 2330 * can be left unspecified, and will be matched based on DAI 2331 * name alone.. 2332 */ 2333 if (link->cpu_name && link->cpu_of_node) { 2334 dev_err(card->dev, 2335 "ASoC: Neither/both cpu name/of_node are set for %s\n", 2336 link->name); 2337 return -EINVAL; 2338 } 2339 /* 2340 * At least one of CPU DAI name or CPU device name/node must be 2341 * specified 2342 */ 2343 if (!link->cpu_dai_name && 2344 !(link->cpu_name || link->cpu_of_node)) { 2345 dev_err(card->dev, 2346 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n", 2347 link->name); 2348 return -EINVAL; 2349 } 2350 } 2351 2352 dev_set_drvdata(card->dev, card); 2353 2354 snd_soc_initialize_card_lists(card); 2355 2356 soc_init_card_debugfs(card); 2357 2358 card->rtd = devm_kzalloc(card->dev, 2359 sizeof(struct snd_soc_pcm_runtime) * 2360 (card->num_links + card->num_aux_devs), 2361 GFP_KERNEL); 2362 if (card->rtd == NULL) 2363 return -ENOMEM; 2364 card->num_rtd = 0; 2365 card->rtd_aux = &card->rtd[card->num_links]; 2366 2367 for (i = 0; i < card->num_links; i++) { 2368 card->rtd[i].card = card; 2369 card->rtd[i].dai_link = &card->dai_link[i]; 2370 card->rtd[i].codec_dais = devm_kzalloc(card->dev, 2371 sizeof(struct snd_soc_dai *) * 2372 (card->rtd[i].dai_link->num_codecs), 2373 GFP_KERNEL); 2374 if (card->rtd[i].codec_dais == NULL) 2375 return -ENOMEM; 2376 } 2377 2378 for (i = 0; i < card->num_aux_devs; i++) 2379 card->rtd_aux[i].card = card; 2380 2381 INIT_LIST_HEAD(&card->dapm_dirty); 2382 card->instantiated = 0; 2383 mutex_init(&card->mutex); 2384 mutex_init(&card->dapm_mutex); 2385 2386 ret = snd_soc_instantiate_card(card); 2387 if (ret != 0) 2388 soc_cleanup_card_debugfs(card); 2389 2390 /* deactivate pins to sleep state */ 2391 for (i = 0; i < card->num_rtd; i++) { 2392 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 2393 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2394 int j; 2395 2396 for (j = 0; j < rtd->num_codecs; j++) { 2397 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 2398 if (!codec_dai->active) 2399 pinctrl_pm_select_sleep_state(codec_dai->dev); 2400 } 2401 2402 if (!cpu_dai->active) 2403 pinctrl_pm_select_sleep_state(cpu_dai->dev); 2404 } 2405 2406 return ret; 2407 } 2408 EXPORT_SYMBOL_GPL(snd_soc_register_card); 2409 2410 /** 2411 * snd_soc_unregister_card - Unregister a card with the ASoC core 2412 * 2413 * @card: Card to unregister 2414 * 2415 */ 2416 int snd_soc_unregister_card(struct snd_soc_card *card) 2417 { 2418 if (card->instantiated) { 2419 card->instantiated = false; 2420 snd_soc_dapm_shutdown(card); 2421 soc_cleanup_card_resources(card); 2422 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name); 2423 } 2424 2425 return 0; 2426 } 2427 EXPORT_SYMBOL_GPL(snd_soc_unregister_card); 2428 2429 /* 2430 * Simplify DAI link configuration by removing ".-1" from device names 2431 * and sanitizing names. 2432 */ 2433 static char *fmt_single_name(struct device *dev, int *id) 2434 { 2435 char *found, name[NAME_SIZE]; 2436 int id1, id2; 2437 2438 if (dev_name(dev) == NULL) 2439 return NULL; 2440 2441 strlcpy(name, dev_name(dev), NAME_SIZE); 2442 2443 /* are we a "%s.%d" name (platform and SPI components) */ 2444 found = strstr(name, dev->driver->name); 2445 if (found) { 2446 /* get ID */ 2447 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) { 2448 2449 /* discard ID from name if ID == -1 */ 2450 if (*id == -1) 2451 found[strlen(dev->driver->name)] = '\0'; 2452 } 2453 2454 } else { 2455 /* I2C component devices are named "bus-addr" */ 2456 if (sscanf(name, "%x-%x", &id1, &id2) == 2) { 2457 char tmp[NAME_SIZE]; 2458 2459 /* create unique ID number from I2C addr and bus */ 2460 *id = ((id1 & 0xffff) << 16) + id2; 2461 2462 /* sanitize component name for DAI link creation */ 2463 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name); 2464 strlcpy(name, tmp, NAME_SIZE); 2465 } else 2466 *id = 0; 2467 } 2468 2469 return kstrdup(name, GFP_KERNEL); 2470 } 2471 2472 /* 2473 * Simplify DAI link naming for single devices with multiple DAIs by removing 2474 * any ".-1" and using the DAI name (instead of device name). 2475 */ 2476 static inline char *fmt_multiple_name(struct device *dev, 2477 struct snd_soc_dai_driver *dai_drv) 2478 { 2479 if (dai_drv->name == NULL) { 2480 dev_err(dev, 2481 "ASoC: error - multiple DAI %s registered with no name\n", 2482 dev_name(dev)); 2483 return NULL; 2484 } 2485 2486 return kstrdup(dai_drv->name, GFP_KERNEL); 2487 } 2488 2489 /** 2490 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core 2491 * 2492 * @component: The component for which the DAIs should be unregistered 2493 */ 2494 static void snd_soc_unregister_dais(struct snd_soc_component *component) 2495 { 2496 struct snd_soc_dai *dai, *_dai; 2497 2498 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) { 2499 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n", 2500 dai->name); 2501 list_del(&dai->list); 2502 kfree(dai->name); 2503 kfree(dai); 2504 } 2505 } 2506 2507 /** 2508 * snd_soc_register_dais - Register a DAI with the ASoC core 2509 * 2510 * @component: The component the DAIs are registered for 2511 * @dai_drv: DAI driver to use for the DAIs 2512 * @count: Number of DAIs 2513 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the 2514 * parent's name. 2515 */ 2516 static int snd_soc_register_dais(struct snd_soc_component *component, 2517 struct snd_soc_dai_driver *dai_drv, size_t count, 2518 bool legacy_dai_naming) 2519 { 2520 struct device *dev = component->dev; 2521 struct snd_soc_dai *dai; 2522 unsigned int i; 2523 int ret; 2524 2525 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count); 2526 2527 component->dai_drv = dai_drv; 2528 component->num_dai = count; 2529 2530 for (i = 0; i < count; i++) { 2531 2532 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL); 2533 if (dai == NULL) { 2534 ret = -ENOMEM; 2535 goto err; 2536 } 2537 2538 /* 2539 * Back in the old days when we still had component-less DAIs, 2540 * instead of having a static name, component-less DAIs would 2541 * inherit the name of the parent device so it is possible to 2542 * register multiple instances of the DAI. We still need to keep 2543 * the same naming style even though those DAIs are not 2544 * component-less anymore. 2545 */ 2546 if (count == 1 && legacy_dai_naming) { 2547 dai->name = fmt_single_name(dev, &dai->id); 2548 } else { 2549 dai->name = fmt_multiple_name(dev, &dai_drv[i]); 2550 if (dai_drv[i].id) 2551 dai->id = dai_drv[i].id; 2552 else 2553 dai->id = i; 2554 } 2555 if (dai->name == NULL) { 2556 kfree(dai); 2557 ret = -ENOMEM; 2558 goto err; 2559 } 2560 2561 dai->component = component; 2562 dai->dev = dev; 2563 dai->driver = &dai_drv[i]; 2564 if (!dai->driver->ops) 2565 dai->driver->ops = &null_dai_ops; 2566 2567 list_add(&dai->list, &component->dai_list); 2568 2569 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name); 2570 } 2571 2572 return 0; 2573 2574 err: 2575 snd_soc_unregister_dais(component); 2576 2577 return ret; 2578 } 2579 2580 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, 2581 enum snd_soc_dapm_type type, int subseq) 2582 { 2583 struct snd_soc_component *component = dapm->component; 2584 2585 component->driver->seq_notifier(component, type, subseq); 2586 } 2587 2588 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm, 2589 int event) 2590 { 2591 struct snd_soc_component *component = dapm->component; 2592 2593 return component->driver->stream_event(component, event); 2594 } 2595 2596 static int snd_soc_component_initialize(struct snd_soc_component *component, 2597 const struct snd_soc_component_driver *driver, struct device *dev) 2598 { 2599 struct snd_soc_dapm_context *dapm; 2600 2601 component->name = fmt_single_name(dev, &component->id); 2602 if (!component->name) { 2603 dev_err(dev, "ASoC: Failed to allocate name\n"); 2604 return -ENOMEM; 2605 } 2606 2607 component->dev = dev; 2608 component->driver = driver; 2609 component->probe = component->driver->probe; 2610 component->remove = component->driver->remove; 2611 2612 if (!component->dapm_ptr) 2613 component->dapm_ptr = &component->dapm; 2614 2615 dapm = component->dapm_ptr; 2616 dapm->dev = dev; 2617 dapm->component = component; 2618 dapm->bias_level = SND_SOC_BIAS_OFF; 2619 dapm->idle_bias_off = true; 2620 if (driver->seq_notifier) 2621 dapm->seq_notifier = snd_soc_component_seq_notifier; 2622 if (driver->stream_event) 2623 dapm->stream_event = snd_soc_component_stream_event; 2624 2625 component->controls = driver->controls; 2626 component->num_controls = driver->num_controls; 2627 component->dapm_widgets = driver->dapm_widgets; 2628 component->num_dapm_widgets = driver->num_dapm_widgets; 2629 component->dapm_routes = driver->dapm_routes; 2630 component->num_dapm_routes = driver->num_dapm_routes; 2631 2632 INIT_LIST_HEAD(&component->dai_list); 2633 mutex_init(&component->io_mutex); 2634 2635 return 0; 2636 } 2637 2638 static void snd_soc_component_setup_regmap(struct snd_soc_component *component) 2639 { 2640 int val_bytes = regmap_get_val_bytes(component->regmap); 2641 2642 /* Errors are legitimate for non-integer byte multiples */ 2643 if (val_bytes > 0) 2644 component->val_bytes = val_bytes; 2645 } 2646 2647 #ifdef CONFIG_REGMAP 2648 2649 /** 2650 * snd_soc_component_init_regmap() - Initialize regmap instance for the component 2651 * @component: The component for which to initialize the regmap instance 2652 * @regmap: The regmap instance that should be used by the component 2653 * 2654 * This function allows deferred assignment of the regmap instance that is 2655 * associated with the component. Only use this if the regmap instance is not 2656 * yet ready when the component is registered. The function must also be called 2657 * before the first IO attempt of the component. 2658 */ 2659 void snd_soc_component_init_regmap(struct snd_soc_component *component, 2660 struct regmap *regmap) 2661 { 2662 component->regmap = regmap; 2663 snd_soc_component_setup_regmap(component); 2664 } 2665 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap); 2666 2667 /** 2668 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component 2669 * @component: The component for which to de-initialize the regmap instance 2670 * 2671 * Calls regmap_exit() on the regmap instance associated to the component and 2672 * removes the regmap instance from the component. 2673 * 2674 * This function should only be used if snd_soc_component_init_regmap() was used 2675 * to initialize the regmap instance. 2676 */ 2677 void snd_soc_component_exit_regmap(struct snd_soc_component *component) 2678 { 2679 regmap_exit(component->regmap); 2680 component->regmap = NULL; 2681 } 2682 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap); 2683 2684 #endif 2685 2686 static void snd_soc_component_add_unlocked(struct snd_soc_component *component) 2687 { 2688 if (!component->write && !component->read) { 2689 if (!component->regmap) 2690 component->regmap = dev_get_regmap(component->dev, NULL); 2691 if (component->regmap) 2692 snd_soc_component_setup_regmap(component); 2693 } 2694 2695 list_add(&component->list, &component_list); 2696 } 2697 2698 static void snd_soc_component_add(struct snd_soc_component *component) 2699 { 2700 mutex_lock(&client_mutex); 2701 snd_soc_component_add_unlocked(component); 2702 mutex_unlock(&client_mutex); 2703 } 2704 2705 static void snd_soc_component_cleanup(struct snd_soc_component *component) 2706 { 2707 snd_soc_unregister_dais(component); 2708 kfree(component->name); 2709 } 2710 2711 static void snd_soc_component_del_unlocked(struct snd_soc_component *component) 2712 { 2713 list_del(&component->list); 2714 } 2715 2716 static void snd_soc_component_del(struct snd_soc_component *component) 2717 { 2718 mutex_lock(&client_mutex); 2719 snd_soc_component_del_unlocked(component); 2720 mutex_unlock(&client_mutex); 2721 } 2722 2723 int snd_soc_register_component(struct device *dev, 2724 const struct snd_soc_component_driver *cmpnt_drv, 2725 struct snd_soc_dai_driver *dai_drv, 2726 int num_dai) 2727 { 2728 struct snd_soc_component *cmpnt; 2729 int ret; 2730 2731 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL); 2732 if (!cmpnt) { 2733 dev_err(dev, "ASoC: Failed to allocate memory\n"); 2734 return -ENOMEM; 2735 } 2736 2737 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev); 2738 if (ret) 2739 goto err_free; 2740 2741 cmpnt->ignore_pmdown_time = true; 2742 cmpnt->registered_as_component = true; 2743 2744 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true); 2745 if (ret < 0) { 2746 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret); 2747 goto err_cleanup; 2748 } 2749 2750 snd_soc_component_add(cmpnt); 2751 2752 return 0; 2753 2754 err_cleanup: 2755 snd_soc_component_cleanup(cmpnt); 2756 err_free: 2757 kfree(cmpnt); 2758 return ret; 2759 } 2760 EXPORT_SYMBOL_GPL(snd_soc_register_component); 2761 2762 /** 2763 * snd_soc_unregister_component - Unregister a component from the ASoC core 2764 * 2765 */ 2766 void snd_soc_unregister_component(struct device *dev) 2767 { 2768 struct snd_soc_component *cmpnt; 2769 2770 list_for_each_entry(cmpnt, &component_list, list) { 2771 if (dev == cmpnt->dev && cmpnt->registered_as_component) 2772 goto found; 2773 } 2774 return; 2775 2776 found: 2777 snd_soc_component_del(cmpnt); 2778 snd_soc_component_cleanup(cmpnt); 2779 kfree(cmpnt); 2780 } 2781 EXPORT_SYMBOL_GPL(snd_soc_unregister_component); 2782 2783 static int snd_soc_platform_drv_probe(struct snd_soc_component *component) 2784 { 2785 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2786 2787 return platform->driver->probe(platform); 2788 } 2789 2790 static void snd_soc_platform_drv_remove(struct snd_soc_component *component) 2791 { 2792 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2793 2794 platform->driver->remove(platform); 2795 } 2796 2797 /** 2798 * snd_soc_add_platform - Add a platform to the ASoC core 2799 * @dev: The parent device for the platform 2800 * @platform: The platform to add 2801 * @platform_driver: The driver for the platform 2802 */ 2803 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform, 2804 const struct snd_soc_platform_driver *platform_drv) 2805 { 2806 int ret; 2807 2808 ret = snd_soc_component_initialize(&platform->component, 2809 &platform_drv->component_driver, dev); 2810 if (ret) 2811 return ret; 2812 2813 platform->dev = dev; 2814 platform->driver = platform_drv; 2815 2816 if (platform_drv->probe) 2817 platform->component.probe = snd_soc_platform_drv_probe; 2818 if (platform_drv->remove) 2819 platform->component.remove = snd_soc_platform_drv_remove; 2820 2821 #ifdef CONFIG_DEBUG_FS 2822 platform->component.debugfs_prefix = "platform"; 2823 #endif 2824 2825 mutex_lock(&client_mutex); 2826 snd_soc_component_add_unlocked(&platform->component); 2827 list_add(&platform->list, &platform_list); 2828 mutex_unlock(&client_mutex); 2829 2830 dev_dbg(dev, "ASoC: Registered platform '%s'\n", 2831 platform->component.name); 2832 2833 return 0; 2834 } 2835 EXPORT_SYMBOL_GPL(snd_soc_add_platform); 2836 2837 /** 2838 * snd_soc_register_platform - Register a platform with the ASoC core 2839 * 2840 * @platform: platform to register 2841 */ 2842 int snd_soc_register_platform(struct device *dev, 2843 const struct snd_soc_platform_driver *platform_drv) 2844 { 2845 struct snd_soc_platform *platform; 2846 int ret; 2847 2848 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev)); 2849 2850 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL); 2851 if (platform == NULL) 2852 return -ENOMEM; 2853 2854 ret = snd_soc_add_platform(dev, platform, platform_drv); 2855 if (ret) 2856 kfree(platform); 2857 2858 return ret; 2859 } 2860 EXPORT_SYMBOL_GPL(snd_soc_register_platform); 2861 2862 /** 2863 * snd_soc_remove_platform - Remove a platform from the ASoC core 2864 * @platform: the platform to remove 2865 */ 2866 void snd_soc_remove_platform(struct snd_soc_platform *platform) 2867 { 2868 2869 mutex_lock(&client_mutex); 2870 list_del(&platform->list); 2871 snd_soc_component_del_unlocked(&platform->component); 2872 mutex_unlock(&client_mutex); 2873 2874 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n", 2875 platform->component.name); 2876 2877 snd_soc_component_cleanup(&platform->component); 2878 } 2879 EXPORT_SYMBOL_GPL(snd_soc_remove_platform); 2880 2881 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev) 2882 { 2883 struct snd_soc_platform *platform; 2884 2885 list_for_each_entry(platform, &platform_list, list) { 2886 if (dev == platform->dev) 2887 return platform; 2888 } 2889 2890 return NULL; 2891 } 2892 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform); 2893 2894 /** 2895 * snd_soc_unregister_platform - Unregister a platform from the ASoC core 2896 * 2897 * @platform: platform to unregister 2898 */ 2899 void snd_soc_unregister_platform(struct device *dev) 2900 { 2901 struct snd_soc_platform *platform; 2902 2903 platform = snd_soc_lookup_platform(dev); 2904 if (!platform) 2905 return; 2906 2907 snd_soc_remove_platform(platform); 2908 kfree(platform); 2909 } 2910 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform); 2911 2912 static u64 codec_format_map[] = { 2913 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE, 2914 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE, 2915 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE, 2916 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE, 2917 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, 2918 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE, 2919 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2920 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2921 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE, 2922 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE, 2923 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE, 2924 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE, 2925 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE, 2926 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE, 2927 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 2928 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE, 2929 }; 2930 2931 /* Fix up the DAI formats for endianness: codecs don't actually see 2932 * the endianness of the data but we're using the CPU format 2933 * definitions which do need to include endianness so we ensure that 2934 * codec DAIs always have both big and little endian variants set. 2935 */ 2936 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream) 2937 { 2938 int i; 2939 2940 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++) 2941 if (stream->formats & codec_format_map[i]) 2942 stream->formats |= codec_format_map[i]; 2943 } 2944 2945 static int snd_soc_codec_drv_probe(struct snd_soc_component *component) 2946 { 2947 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2948 2949 return codec->driver->probe(codec); 2950 } 2951 2952 static void snd_soc_codec_drv_remove(struct snd_soc_component *component) 2953 { 2954 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2955 2956 codec->driver->remove(codec); 2957 } 2958 2959 static int snd_soc_codec_drv_write(struct snd_soc_component *component, 2960 unsigned int reg, unsigned int val) 2961 { 2962 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2963 2964 return codec->driver->write(codec, reg, val); 2965 } 2966 2967 static int snd_soc_codec_drv_read(struct snd_soc_component *component, 2968 unsigned int reg, unsigned int *val) 2969 { 2970 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2971 2972 *val = codec->driver->read(codec, reg); 2973 2974 return 0; 2975 } 2976 2977 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm, 2978 enum snd_soc_bias_level level) 2979 { 2980 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm); 2981 2982 return codec->driver->set_bias_level(codec, level); 2983 } 2984 2985 /** 2986 * snd_soc_register_codec - Register a codec with the ASoC core 2987 * 2988 * @codec: codec to register 2989 */ 2990 int snd_soc_register_codec(struct device *dev, 2991 const struct snd_soc_codec_driver *codec_drv, 2992 struct snd_soc_dai_driver *dai_drv, 2993 int num_dai) 2994 { 2995 struct snd_soc_codec *codec; 2996 struct snd_soc_dai *dai; 2997 int ret, i; 2998 2999 dev_dbg(dev, "codec register %s\n", dev_name(dev)); 3000 3001 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 3002 if (codec == NULL) 3003 return -ENOMEM; 3004 3005 codec->component.dapm_ptr = &codec->dapm; 3006 codec->component.codec = codec; 3007 3008 ret = snd_soc_component_initialize(&codec->component, 3009 &codec_drv->component_driver, dev); 3010 if (ret) 3011 goto err_free; 3012 3013 if (codec_drv->controls) { 3014 codec->component.controls = codec_drv->controls; 3015 codec->component.num_controls = codec_drv->num_controls; 3016 } 3017 if (codec_drv->dapm_widgets) { 3018 codec->component.dapm_widgets = codec_drv->dapm_widgets; 3019 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets; 3020 } 3021 if (codec_drv->dapm_routes) { 3022 codec->component.dapm_routes = codec_drv->dapm_routes; 3023 codec->component.num_dapm_routes = codec_drv->num_dapm_routes; 3024 } 3025 3026 if (codec_drv->probe) 3027 codec->component.probe = snd_soc_codec_drv_probe; 3028 if (codec_drv->remove) 3029 codec->component.remove = snd_soc_codec_drv_remove; 3030 if (codec_drv->write) 3031 codec->component.write = snd_soc_codec_drv_write; 3032 if (codec_drv->read) 3033 codec->component.read = snd_soc_codec_drv_read; 3034 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time; 3035 codec->dapm.idle_bias_off = codec_drv->idle_bias_off; 3036 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off; 3037 if (codec_drv->seq_notifier) 3038 codec->dapm.seq_notifier = codec_drv->seq_notifier; 3039 if (codec_drv->set_bias_level) 3040 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level; 3041 codec->dev = dev; 3042 codec->driver = codec_drv; 3043 codec->component.val_bytes = codec_drv->reg_word_size; 3044 3045 #ifdef CONFIG_DEBUG_FS 3046 codec->component.init_debugfs = soc_init_codec_debugfs; 3047 codec->component.debugfs_prefix = "codec"; 3048 #endif 3049 3050 if (codec_drv->get_regmap) 3051 codec->component.regmap = codec_drv->get_regmap(dev); 3052 3053 for (i = 0; i < num_dai; i++) { 3054 fixup_codec_formats(&dai_drv[i].playback); 3055 fixup_codec_formats(&dai_drv[i].capture); 3056 } 3057 3058 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false); 3059 if (ret < 0) { 3060 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret); 3061 goto err_cleanup; 3062 } 3063 3064 list_for_each_entry(dai, &codec->component.dai_list, list) 3065 dai->codec = codec; 3066 3067 mutex_lock(&client_mutex); 3068 snd_soc_component_add_unlocked(&codec->component); 3069 list_add(&codec->list, &codec_list); 3070 mutex_unlock(&client_mutex); 3071 3072 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", 3073 codec->component.name); 3074 return 0; 3075 3076 err_cleanup: 3077 snd_soc_component_cleanup(&codec->component); 3078 err_free: 3079 kfree(codec); 3080 return ret; 3081 } 3082 EXPORT_SYMBOL_GPL(snd_soc_register_codec); 3083 3084 /** 3085 * snd_soc_unregister_codec - Unregister a codec from the ASoC core 3086 * 3087 * @codec: codec to unregister 3088 */ 3089 void snd_soc_unregister_codec(struct device *dev) 3090 { 3091 struct snd_soc_codec *codec; 3092 3093 list_for_each_entry(codec, &codec_list, list) { 3094 if (dev == codec->dev) 3095 goto found; 3096 } 3097 return; 3098 3099 found: 3100 3101 mutex_lock(&client_mutex); 3102 list_del(&codec->list); 3103 snd_soc_component_del_unlocked(&codec->component); 3104 mutex_unlock(&client_mutex); 3105 3106 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", 3107 codec->component.name); 3108 3109 snd_soc_component_cleanup(&codec->component); 3110 snd_soc_cache_exit(codec); 3111 kfree(codec); 3112 } 3113 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); 3114 3115 /* Retrieve a card's name from device tree */ 3116 int snd_soc_of_parse_card_name(struct snd_soc_card *card, 3117 const char *propname) 3118 { 3119 struct device_node *np; 3120 int ret; 3121 3122 if (!card->dev) { 3123 pr_err("card->dev is not set before calling %s\n", __func__); 3124 return -EINVAL; 3125 } 3126 3127 np = card->dev->of_node; 3128 3129 ret = of_property_read_string_index(np, propname, 0, &card->name); 3130 /* 3131 * EINVAL means the property does not exist. This is fine providing 3132 * card->name was previously set, which is checked later in 3133 * snd_soc_register_card. 3134 */ 3135 if (ret < 0 && ret != -EINVAL) { 3136 dev_err(card->dev, 3137 "ASoC: Property '%s' could not be read: %d\n", 3138 propname, ret); 3139 return ret; 3140 } 3141 3142 return 0; 3143 } 3144 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name); 3145 3146 static const struct snd_soc_dapm_widget simple_widgets[] = { 3147 SND_SOC_DAPM_MIC("Microphone", NULL), 3148 SND_SOC_DAPM_LINE("Line", NULL), 3149 SND_SOC_DAPM_HP("Headphone", NULL), 3150 SND_SOC_DAPM_SPK("Speaker", NULL), 3151 }; 3152 3153 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card, 3154 const char *propname) 3155 { 3156 struct device_node *np = card->dev->of_node; 3157 struct snd_soc_dapm_widget *widgets; 3158 const char *template, *wname; 3159 int i, j, num_widgets, ret; 3160 3161 num_widgets = of_property_count_strings(np, propname); 3162 if (num_widgets < 0) { 3163 dev_err(card->dev, 3164 "ASoC: Property '%s' does not exist\n", propname); 3165 return -EINVAL; 3166 } 3167 if (num_widgets & 1) { 3168 dev_err(card->dev, 3169 "ASoC: Property '%s' length is not even\n", propname); 3170 return -EINVAL; 3171 } 3172 3173 num_widgets /= 2; 3174 if (!num_widgets) { 3175 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3176 propname); 3177 return -EINVAL; 3178 } 3179 3180 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets), 3181 GFP_KERNEL); 3182 if (!widgets) { 3183 dev_err(card->dev, 3184 "ASoC: Could not allocate memory for widgets\n"); 3185 return -ENOMEM; 3186 } 3187 3188 for (i = 0; i < num_widgets; i++) { 3189 ret = of_property_read_string_index(np, propname, 3190 2 * i, &template); 3191 if (ret) { 3192 dev_err(card->dev, 3193 "ASoC: Property '%s' index %d read error:%d\n", 3194 propname, 2 * i, ret); 3195 return -EINVAL; 3196 } 3197 3198 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) { 3199 if (!strncmp(template, simple_widgets[j].name, 3200 strlen(simple_widgets[j].name))) { 3201 widgets[i] = simple_widgets[j]; 3202 break; 3203 } 3204 } 3205 3206 if (j >= ARRAY_SIZE(simple_widgets)) { 3207 dev_err(card->dev, 3208 "ASoC: DAPM widget '%s' is not supported\n", 3209 template); 3210 return -EINVAL; 3211 } 3212 3213 ret = of_property_read_string_index(np, propname, 3214 (2 * i) + 1, 3215 &wname); 3216 if (ret) { 3217 dev_err(card->dev, 3218 "ASoC: Property '%s' index %d read error:%d\n", 3219 propname, (2 * i) + 1, ret); 3220 return -EINVAL; 3221 } 3222 3223 widgets[i].name = wname; 3224 } 3225 3226 card->dapm_widgets = widgets; 3227 card->num_dapm_widgets = num_widgets; 3228 3229 return 0; 3230 } 3231 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets); 3232 3233 int snd_soc_of_parse_tdm_slot(struct device_node *np, 3234 unsigned int *slots, 3235 unsigned int *slot_width) 3236 { 3237 u32 val; 3238 int ret; 3239 3240 if (of_property_read_bool(np, "dai-tdm-slot-num")) { 3241 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val); 3242 if (ret) 3243 return ret; 3244 3245 if (slots) 3246 *slots = val; 3247 } 3248 3249 if (of_property_read_bool(np, "dai-tdm-slot-width")) { 3250 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val); 3251 if (ret) 3252 return ret; 3253 3254 if (slot_width) 3255 *slot_width = val; 3256 } 3257 3258 return 0; 3259 } 3260 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot); 3261 3262 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card, 3263 const char *propname) 3264 { 3265 struct device_node *np = card->dev->of_node; 3266 int num_routes; 3267 struct snd_soc_dapm_route *routes; 3268 int i, ret; 3269 3270 num_routes = of_property_count_strings(np, propname); 3271 if (num_routes < 0 || num_routes & 1) { 3272 dev_err(card->dev, 3273 "ASoC: Property '%s' does not exist or its length is not even\n", 3274 propname); 3275 return -EINVAL; 3276 } 3277 num_routes /= 2; 3278 if (!num_routes) { 3279 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3280 propname); 3281 return -EINVAL; 3282 } 3283 3284 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes), 3285 GFP_KERNEL); 3286 if (!routes) { 3287 dev_err(card->dev, 3288 "ASoC: Could not allocate DAPM route table\n"); 3289 return -EINVAL; 3290 } 3291 3292 for (i = 0; i < num_routes; i++) { 3293 ret = of_property_read_string_index(np, propname, 3294 2 * i, &routes[i].sink); 3295 if (ret) { 3296 dev_err(card->dev, 3297 "ASoC: Property '%s' index %d could not be read: %d\n", 3298 propname, 2 * i, ret); 3299 return -EINVAL; 3300 } 3301 ret = of_property_read_string_index(np, propname, 3302 (2 * i) + 1, &routes[i].source); 3303 if (ret) { 3304 dev_err(card->dev, 3305 "ASoC: Property '%s' index %d could not be read: %d\n", 3306 propname, (2 * i) + 1, ret); 3307 return -EINVAL; 3308 } 3309 } 3310 3311 card->num_dapm_routes = num_routes; 3312 card->dapm_routes = routes; 3313 3314 return 0; 3315 } 3316 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing); 3317 3318 unsigned int snd_soc_of_parse_daifmt(struct device_node *np, 3319 const char *prefix, 3320 struct device_node **bitclkmaster, 3321 struct device_node **framemaster) 3322 { 3323 int ret, i; 3324 char prop[128]; 3325 unsigned int format = 0; 3326 int bit, frame; 3327 const char *str; 3328 struct { 3329 char *name; 3330 unsigned int val; 3331 } of_fmt_table[] = { 3332 { "i2s", SND_SOC_DAIFMT_I2S }, 3333 { "right_j", SND_SOC_DAIFMT_RIGHT_J }, 3334 { "left_j", SND_SOC_DAIFMT_LEFT_J }, 3335 { "dsp_a", SND_SOC_DAIFMT_DSP_A }, 3336 { "dsp_b", SND_SOC_DAIFMT_DSP_B }, 3337 { "ac97", SND_SOC_DAIFMT_AC97 }, 3338 { "pdm", SND_SOC_DAIFMT_PDM}, 3339 { "msb", SND_SOC_DAIFMT_MSB }, 3340 { "lsb", SND_SOC_DAIFMT_LSB }, 3341 }; 3342 3343 if (!prefix) 3344 prefix = ""; 3345 3346 /* 3347 * check "[prefix]format = xxx" 3348 * SND_SOC_DAIFMT_FORMAT_MASK area 3349 */ 3350 snprintf(prop, sizeof(prop), "%sformat", prefix); 3351 ret = of_property_read_string(np, prop, &str); 3352 if (ret == 0) { 3353 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) { 3354 if (strcmp(str, of_fmt_table[i].name) == 0) { 3355 format |= of_fmt_table[i].val; 3356 break; 3357 } 3358 } 3359 } 3360 3361 /* 3362 * check "[prefix]continuous-clock" 3363 * SND_SOC_DAIFMT_CLOCK_MASK area 3364 */ 3365 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix); 3366 if (of_get_property(np, prop, NULL)) 3367 format |= SND_SOC_DAIFMT_CONT; 3368 else 3369 format |= SND_SOC_DAIFMT_GATED; 3370 3371 /* 3372 * check "[prefix]bitclock-inversion" 3373 * check "[prefix]frame-inversion" 3374 * SND_SOC_DAIFMT_INV_MASK area 3375 */ 3376 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix); 3377 bit = !!of_get_property(np, prop, NULL); 3378 3379 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix); 3380 frame = !!of_get_property(np, prop, NULL); 3381 3382 switch ((bit << 4) + frame) { 3383 case 0x11: 3384 format |= SND_SOC_DAIFMT_IB_IF; 3385 break; 3386 case 0x10: 3387 format |= SND_SOC_DAIFMT_IB_NF; 3388 break; 3389 case 0x01: 3390 format |= SND_SOC_DAIFMT_NB_IF; 3391 break; 3392 default: 3393 /* SND_SOC_DAIFMT_NB_NF is default */ 3394 break; 3395 } 3396 3397 /* 3398 * check "[prefix]bitclock-master" 3399 * check "[prefix]frame-master" 3400 * SND_SOC_DAIFMT_MASTER_MASK area 3401 */ 3402 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix); 3403 bit = !!of_get_property(np, prop, NULL); 3404 if (bit && bitclkmaster) 3405 *bitclkmaster = of_parse_phandle(np, prop, 0); 3406 3407 snprintf(prop, sizeof(prop), "%sframe-master", prefix); 3408 frame = !!of_get_property(np, prop, NULL); 3409 if (frame && framemaster) 3410 *framemaster = of_parse_phandle(np, prop, 0); 3411 3412 switch ((bit << 4) + frame) { 3413 case 0x11: 3414 format |= SND_SOC_DAIFMT_CBM_CFM; 3415 break; 3416 case 0x10: 3417 format |= SND_SOC_DAIFMT_CBM_CFS; 3418 break; 3419 case 0x01: 3420 format |= SND_SOC_DAIFMT_CBS_CFM; 3421 break; 3422 default: 3423 format |= SND_SOC_DAIFMT_CBS_CFS; 3424 break; 3425 } 3426 3427 return format; 3428 } 3429 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt); 3430 3431 static int snd_soc_get_dai_name(struct of_phandle_args *args, 3432 const char **dai_name) 3433 { 3434 struct snd_soc_component *pos; 3435 int ret = -EPROBE_DEFER; 3436 3437 mutex_lock(&client_mutex); 3438 list_for_each_entry(pos, &component_list, list) { 3439 if (pos->dev->of_node != args->np) 3440 continue; 3441 3442 if (pos->driver->of_xlate_dai_name) { 3443 ret = pos->driver->of_xlate_dai_name(pos, 3444 args, 3445 dai_name); 3446 } else { 3447 int id = -1; 3448 3449 switch (args->args_count) { 3450 case 0: 3451 id = 0; /* same as dai_drv[0] */ 3452 break; 3453 case 1: 3454 id = args->args[0]; 3455 break; 3456 default: 3457 /* not supported */ 3458 break; 3459 } 3460 3461 if (id < 0 || id >= pos->num_dai) { 3462 ret = -EINVAL; 3463 continue; 3464 } 3465 3466 ret = 0; 3467 3468 *dai_name = pos->dai_drv[id].name; 3469 if (!*dai_name) 3470 *dai_name = pos->name; 3471 } 3472 3473 break; 3474 } 3475 mutex_unlock(&client_mutex); 3476 return ret; 3477 } 3478 3479 int snd_soc_of_get_dai_name(struct device_node *of_node, 3480 const char **dai_name) 3481 { 3482 struct of_phandle_args args; 3483 int ret; 3484 3485 ret = of_parse_phandle_with_args(of_node, "sound-dai", 3486 "#sound-dai-cells", 0, &args); 3487 if (ret) 3488 return ret; 3489 3490 ret = snd_soc_get_dai_name(&args, dai_name); 3491 3492 of_node_put(args.np); 3493 3494 return ret; 3495 } 3496 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name); 3497 3498 /* 3499 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree 3500 * @dev: Card device 3501 * @of_node: Device node 3502 * @dai_link: DAI link 3503 * 3504 * Builds an array of CODEC DAI components from the DAI link property 3505 * 'sound-dai'. 3506 * The array is set in the DAI link and the number of DAIs is set accordingly. 3507 * The device nodes in the array (of_node) must be dereferenced by the caller. 3508 * 3509 * Returns 0 for success 3510 */ 3511 int snd_soc_of_get_dai_link_codecs(struct device *dev, 3512 struct device_node *of_node, 3513 struct snd_soc_dai_link *dai_link) 3514 { 3515 struct of_phandle_args args; 3516 struct snd_soc_dai_link_component *component; 3517 char *name; 3518 int index, num_codecs, ret; 3519 3520 /* Count the number of CODECs */ 3521 name = "sound-dai"; 3522 num_codecs = of_count_phandle_with_args(of_node, name, 3523 "#sound-dai-cells"); 3524 if (num_codecs <= 0) { 3525 if (num_codecs == -ENOENT) 3526 dev_err(dev, "No 'sound-dai' property\n"); 3527 else 3528 dev_err(dev, "Bad phandle in 'sound-dai'\n"); 3529 return num_codecs; 3530 } 3531 component = devm_kzalloc(dev, 3532 sizeof *component * num_codecs, 3533 GFP_KERNEL); 3534 if (!component) 3535 return -ENOMEM; 3536 dai_link->codecs = component; 3537 dai_link->num_codecs = num_codecs; 3538 3539 /* Parse the list */ 3540 for (index = 0, component = dai_link->codecs; 3541 index < dai_link->num_codecs; 3542 index++, component++) { 3543 ret = of_parse_phandle_with_args(of_node, name, 3544 "#sound-dai-cells", 3545 index, &args); 3546 if (ret) 3547 goto err; 3548 component->of_node = args.np; 3549 ret = snd_soc_get_dai_name(&args, &component->dai_name); 3550 if (ret < 0) 3551 goto err; 3552 } 3553 return 0; 3554 err: 3555 for (index = 0, component = dai_link->codecs; 3556 index < dai_link->num_codecs; 3557 index++, component++) { 3558 if (!component->of_node) 3559 break; 3560 of_node_put(component->of_node); 3561 component->of_node = NULL; 3562 } 3563 dai_link->codecs = NULL; 3564 dai_link->num_codecs = 0; 3565 return ret; 3566 } 3567 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs); 3568 3569 static int __init snd_soc_init(void) 3570 { 3571 #ifdef CONFIG_DEBUG_FS 3572 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); 3573 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) { 3574 pr_warn("ASoC: Failed to create debugfs directory\n"); 3575 snd_soc_debugfs_root = NULL; 3576 } 3577 3578 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL, 3579 &codec_list_fops)) 3580 pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); 3581 3582 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, 3583 &dai_list_fops)) 3584 pr_warn("ASoC: Failed to create DAI list debugfs file\n"); 3585 3586 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL, 3587 &platform_list_fops)) 3588 pr_warn("ASoC: Failed to create platform list debugfs file\n"); 3589 #endif 3590 3591 snd_soc_util_init(); 3592 3593 return platform_driver_register(&soc_driver); 3594 } 3595 module_init(snd_soc_init); 3596 3597 static void __exit snd_soc_exit(void) 3598 { 3599 snd_soc_util_exit(); 3600 3601 #ifdef CONFIG_DEBUG_FS 3602 debugfs_remove_recursive(snd_soc_debugfs_root); 3603 #endif 3604 platform_driver_unregister(&soc_driver); 3605 } 3606 module_exit(snd_soc_exit); 3607 3608 /* Module information */ 3609 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); 3610 MODULE_DESCRIPTION("ALSA SoC Core"); 3611 MODULE_LICENSE("GPL"); 3612 MODULE_ALIAS("platform:soc-audio"); 3613