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/soc-topology.h> 44 #include <sound/initval.h> 45 46 #define CREATE_TRACE_POINTS 47 #include <trace/events/asoc.h> 48 49 #define NAME_SIZE 32 50 51 #ifdef CONFIG_DEBUG_FS 52 struct dentry *snd_soc_debugfs_root; 53 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root); 54 #endif 55 56 static DEFINE_MUTEX(client_mutex); 57 static LIST_HEAD(platform_list); 58 static LIST_HEAD(codec_list); 59 static LIST_HEAD(component_list); 60 61 /* 62 * This is a timeout to do a DAPM powerdown after a stream is closed(). 63 * It can be used to eliminate pops between different playback streams, e.g. 64 * between two audio tracks. 65 */ 66 static int pmdown_time = 5000; 67 module_param(pmdown_time, int, 0); 68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)"); 69 70 /* returns the minimum number of bytes needed to represent 71 * a particular given value */ 72 static int min_bytes_needed(unsigned long val) 73 { 74 int c = 0; 75 int i; 76 77 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c) 78 if (val & (1UL << i)) 79 break; 80 c = (sizeof val * 8) - c; 81 if (!c || (c % 8)) 82 c = (c + 8) / 8; 83 else 84 c /= 8; 85 return c; 86 } 87 88 /* fill buf which is 'len' bytes with a formatted 89 * string of the form 'reg: value\n' */ 90 static int format_register_str(struct snd_soc_codec *codec, 91 unsigned int reg, char *buf, size_t len) 92 { 93 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; 94 int regsize = codec->driver->reg_word_size * 2; 95 int ret; 96 97 /* +2 for ': ' and + 1 for '\n' */ 98 if (wordsize + regsize + 2 + 1 != len) 99 return -EINVAL; 100 101 sprintf(buf, "%.*x: ", wordsize, reg); 102 buf += wordsize + 2; 103 104 ret = snd_soc_read(codec, reg); 105 if (ret < 0) 106 memset(buf, 'X', regsize); 107 else 108 sprintf(buf, "%.*x", regsize, ret); 109 buf[regsize] = '\n'; 110 /* no NUL-termination needed */ 111 return 0; 112 } 113 114 /* codec register dump */ 115 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf, 116 size_t count, loff_t pos) 117 { 118 int i, step = 1; 119 int wordsize, regsize; 120 int len; 121 size_t total = 0; 122 loff_t p = 0; 123 124 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; 125 regsize = codec->driver->reg_word_size * 2; 126 127 len = wordsize + regsize + 2 + 1; 128 129 if (!codec->driver->reg_cache_size) 130 return 0; 131 132 if (codec->driver->reg_cache_step) 133 step = codec->driver->reg_cache_step; 134 135 for (i = 0; i < codec->driver->reg_cache_size; i += step) { 136 /* only support larger than PAGE_SIZE bytes debugfs 137 * entries for the default case */ 138 if (p >= pos) { 139 if (total + len >= count - 1) 140 break; 141 format_register_str(codec, i, buf + total, len); 142 total += len; 143 } 144 p += len; 145 } 146 147 total = min(total, count - 1); 148 149 return total; 150 } 151 152 static ssize_t codec_reg_show(struct device *dev, 153 struct device_attribute *attr, char *buf) 154 { 155 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 156 157 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0); 158 } 159 160 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL); 161 162 static ssize_t pmdown_time_show(struct device *dev, 163 struct device_attribute *attr, char *buf) 164 { 165 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 166 167 return sprintf(buf, "%ld\n", rtd->pmdown_time); 168 } 169 170 static ssize_t pmdown_time_set(struct device *dev, 171 struct device_attribute *attr, 172 const char *buf, size_t count) 173 { 174 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 175 int ret; 176 177 ret = kstrtol(buf, 10, &rtd->pmdown_time); 178 if (ret) 179 return ret; 180 181 return count; 182 } 183 184 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set); 185 186 static struct attribute *soc_dev_attrs[] = { 187 &dev_attr_codec_reg.attr, 188 &dev_attr_pmdown_time.attr, 189 NULL 190 }; 191 192 static umode_t soc_dev_attr_is_visible(struct kobject *kobj, 193 struct attribute *attr, int idx) 194 { 195 struct device *dev = kobj_to_dev(kobj); 196 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 197 198 if (attr == &dev_attr_pmdown_time.attr) 199 return attr->mode; /* always visible */ 200 return rtd->codec ? attr->mode : 0; /* enabled only with codec */ 201 } 202 203 static const struct attribute_group soc_dapm_dev_group = { 204 .attrs = soc_dapm_dev_attrs, 205 .is_visible = soc_dev_attr_is_visible, 206 }; 207 208 static const struct attribute_group soc_dev_roup = { 209 .attrs = soc_dev_attrs, 210 .is_visible = soc_dev_attr_is_visible, 211 }; 212 213 static const struct attribute_group *soc_dev_attr_groups[] = { 214 &soc_dapm_dev_group, 215 &soc_dev_roup, 216 NULL 217 }; 218 219 #ifdef CONFIG_DEBUG_FS 220 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf, 221 size_t count, loff_t *ppos) 222 { 223 ssize_t ret; 224 struct snd_soc_codec *codec = file->private_data; 225 char *buf; 226 227 if (*ppos < 0 || !count) 228 return -EINVAL; 229 230 buf = kmalloc(count, GFP_KERNEL); 231 if (!buf) 232 return -ENOMEM; 233 234 ret = soc_codec_reg_show(codec, buf, count, *ppos); 235 if (ret >= 0) { 236 if (copy_to_user(user_buf, buf, ret)) { 237 kfree(buf); 238 return -EFAULT; 239 } 240 *ppos += ret; 241 } 242 243 kfree(buf); 244 return ret; 245 } 246 247 static ssize_t codec_reg_write_file(struct file *file, 248 const char __user *user_buf, size_t count, loff_t *ppos) 249 { 250 char buf[32]; 251 size_t buf_size; 252 char *start = buf; 253 unsigned long reg, value; 254 struct snd_soc_codec *codec = file->private_data; 255 int ret; 256 257 buf_size = min(count, (sizeof(buf)-1)); 258 if (copy_from_user(buf, user_buf, buf_size)) 259 return -EFAULT; 260 buf[buf_size] = 0; 261 262 while (*start == ' ') 263 start++; 264 reg = simple_strtoul(start, &start, 16); 265 while (*start == ' ') 266 start++; 267 ret = kstrtoul(start, 16, &value); 268 if (ret) 269 return ret; 270 271 /* Userspace has been fiddling around behind the kernel's back */ 272 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE); 273 274 snd_soc_write(codec, reg, value); 275 return buf_size; 276 } 277 278 static const struct file_operations codec_reg_fops = { 279 .open = simple_open, 280 .read = codec_reg_read_file, 281 .write = codec_reg_write_file, 282 .llseek = default_llseek, 283 }; 284 285 static void soc_init_component_debugfs(struct snd_soc_component *component) 286 { 287 if (!component->card->debugfs_card_root) 288 return; 289 290 if (component->debugfs_prefix) { 291 char *name; 292 293 name = kasprintf(GFP_KERNEL, "%s:%s", 294 component->debugfs_prefix, component->name); 295 if (name) { 296 component->debugfs_root = debugfs_create_dir(name, 297 component->card->debugfs_card_root); 298 kfree(name); 299 } 300 } else { 301 component->debugfs_root = debugfs_create_dir(component->name, 302 component->card->debugfs_card_root); 303 } 304 305 if (!component->debugfs_root) { 306 dev_warn(component->dev, 307 "ASoC: Failed to create component debugfs directory\n"); 308 return; 309 } 310 311 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component), 312 component->debugfs_root); 313 314 if (component->init_debugfs) 315 component->init_debugfs(component); 316 } 317 318 static void soc_cleanup_component_debugfs(struct snd_soc_component *component) 319 { 320 debugfs_remove_recursive(component->debugfs_root); 321 } 322 323 static void soc_init_codec_debugfs(struct snd_soc_component *component) 324 { 325 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 326 327 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, 328 codec->component.debugfs_root, 329 codec, &codec_reg_fops); 330 if (!codec->debugfs_reg) 331 dev_warn(codec->dev, 332 "ASoC: Failed to create codec register debugfs file\n"); 333 } 334 335 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf, 336 size_t count, loff_t *ppos) 337 { 338 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 339 ssize_t len, ret = 0; 340 struct snd_soc_codec *codec; 341 342 if (!buf) 343 return -ENOMEM; 344 345 mutex_lock(&client_mutex); 346 347 list_for_each_entry(codec, &codec_list, list) { 348 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 349 codec->component.name); 350 if (len >= 0) 351 ret += len; 352 if (ret > PAGE_SIZE) { 353 ret = PAGE_SIZE; 354 break; 355 } 356 } 357 358 mutex_unlock(&client_mutex); 359 360 if (ret >= 0) 361 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 362 363 kfree(buf); 364 365 return ret; 366 } 367 368 static const struct file_operations codec_list_fops = { 369 .read = codec_list_read_file, 370 .llseek = default_llseek,/* read accesses f_pos */ 371 }; 372 373 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf, 374 size_t count, loff_t *ppos) 375 { 376 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 377 ssize_t len, ret = 0; 378 struct snd_soc_component *component; 379 struct snd_soc_dai *dai; 380 381 if (!buf) 382 return -ENOMEM; 383 384 mutex_lock(&client_mutex); 385 386 list_for_each_entry(component, &component_list, list) { 387 list_for_each_entry(dai, &component->dai_list, list) { 388 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 389 dai->name); 390 if (len >= 0) 391 ret += len; 392 if (ret > PAGE_SIZE) { 393 ret = PAGE_SIZE; 394 break; 395 } 396 } 397 } 398 399 mutex_unlock(&client_mutex); 400 401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 402 403 kfree(buf); 404 405 return ret; 406 } 407 408 static const struct file_operations dai_list_fops = { 409 .read = dai_list_read_file, 410 .llseek = default_llseek,/* read accesses f_pos */ 411 }; 412 413 static ssize_t platform_list_read_file(struct file *file, 414 char __user *user_buf, 415 size_t count, loff_t *ppos) 416 { 417 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 418 ssize_t len, ret = 0; 419 struct snd_soc_platform *platform; 420 421 if (!buf) 422 return -ENOMEM; 423 424 mutex_lock(&client_mutex); 425 426 list_for_each_entry(platform, &platform_list, list) { 427 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 428 platform->component.name); 429 if (len >= 0) 430 ret += len; 431 if (ret > PAGE_SIZE) { 432 ret = PAGE_SIZE; 433 break; 434 } 435 } 436 437 mutex_unlock(&client_mutex); 438 439 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 440 441 kfree(buf); 442 443 return ret; 444 } 445 446 static const struct file_operations platform_list_fops = { 447 .read = platform_list_read_file, 448 .llseek = default_llseek,/* read accesses f_pos */ 449 }; 450 451 static void soc_init_card_debugfs(struct snd_soc_card *card) 452 { 453 if (!snd_soc_debugfs_root) 454 return; 455 456 card->debugfs_card_root = debugfs_create_dir(card->name, 457 snd_soc_debugfs_root); 458 if (!card->debugfs_card_root) { 459 dev_warn(card->dev, 460 "ASoC: Failed to create card debugfs directory\n"); 461 return; 462 } 463 464 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644, 465 card->debugfs_card_root, 466 &card->pop_time); 467 if (!card->debugfs_pop_time) 468 dev_warn(card->dev, 469 "ASoC: Failed to create pop time debugfs file\n"); 470 } 471 472 static void soc_cleanup_card_debugfs(struct snd_soc_card *card) 473 { 474 debugfs_remove_recursive(card->debugfs_card_root); 475 } 476 477 478 static void snd_soc_debugfs_init(void) 479 { 480 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); 481 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) { 482 pr_warn("ASoC: Failed to create debugfs directory\n"); 483 snd_soc_debugfs_root = NULL; 484 return; 485 } 486 487 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL, 488 &codec_list_fops)) 489 pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); 490 491 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, 492 &dai_list_fops)) 493 pr_warn("ASoC: Failed to create DAI list debugfs file\n"); 494 495 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL, 496 &platform_list_fops)) 497 pr_warn("ASoC: Failed to create platform list debugfs file\n"); 498 } 499 500 static void snd_soc_debugfs_exit(void) 501 { 502 debugfs_remove_recursive(snd_soc_debugfs_root); 503 } 504 505 #else 506 507 #define soc_init_codec_debugfs NULL 508 509 static inline void soc_init_component_debugfs( 510 struct snd_soc_component *component) 511 { 512 } 513 514 static inline void soc_cleanup_component_debugfs( 515 struct snd_soc_component *component) 516 { 517 } 518 519 static inline void soc_init_card_debugfs(struct snd_soc_card *card) 520 { 521 } 522 523 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) 524 { 525 } 526 527 static inline void snd_soc_debugfs_init(void) 528 { 529 } 530 531 static inline void snd_soc_debugfs_exit(void) 532 { 533 } 534 535 #endif 536 537 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card, 538 const char *dai_link, int stream) 539 { 540 int i; 541 542 for (i = 0; i < card->num_links; i++) { 543 if (card->rtd[i].dai_link->no_pcm && 544 !strcmp(card->rtd[i].dai_link->name, dai_link)) 545 return card->rtd[i].pcm->streams[stream].substream; 546 } 547 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link); 548 return NULL; 549 } 550 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream); 551 552 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card, 553 const char *dai_link) 554 { 555 int i; 556 557 for (i = 0; i < card->num_links; i++) { 558 if (!strcmp(card->rtd[i].dai_link->name, dai_link)) 559 return &card->rtd[i]; 560 } 561 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link); 562 return NULL; 563 } 564 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime); 565 566 static void codec2codec_close_delayed_work(struct work_struct *work) 567 { 568 /* Currently nothing to do for c2c links 569 * Since c2c links are internal nodes in the DAPM graph and 570 * don't interface with the outside world or application layer 571 * we don't have to do any special handling on close. 572 */ 573 } 574 575 #ifdef CONFIG_PM_SLEEP 576 /* powers down audio subsystem for suspend */ 577 int snd_soc_suspend(struct device *dev) 578 { 579 struct snd_soc_card *card = dev_get_drvdata(dev); 580 struct snd_soc_codec *codec; 581 int i, j; 582 583 /* If the card is not initialized yet there is nothing to do */ 584 if (!card->instantiated) 585 return 0; 586 587 /* Due to the resume being scheduled into a workqueue we could 588 * suspend before that's finished - wait for it to complete. 589 */ 590 snd_power_lock(card->snd_card); 591 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0); 592 snd_power_unlock(card->snd_card); 593 594 /* we're going to block userspace touching us until resume completes */ 595 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot); 596 597 /* mute any active DACs */ 598 for (i = 0; i < card->num_rtd; i++) { 599 600 if (card->rtd[i].dai_link->ignore_suspend) 601 continue; 602 603 for (j = 0; j < card->rtd[i].num_codecs; j++) { 604 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 605 struct snd_soc_dai_driver *drv = dai->driver; 606 607 if (drv->ops->digital_mute && dai->playback_active) 608 drv->ops->digital_mute(dai, 1); 609 } 610 } 611 612 /* suspend all pcms */ 613 for (i = 0; i < card->num_rtd; i++) { 614 if (card->rtd[i].dai_link->ignore_suspend) 615 continue; 616 617 snd_pcm_suspend_all(card->rtd[i].pcm); 618 } 619 620 if (card->suspend_pre) 621 card->suspend_pre(card); 622 623 for (i = 0; i < card->num_rtd; i++) { 624 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 625 626 if (card->rtd[i].dai_link->ignore_suspend) 627 continue; 628 629 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control) 630 cpu_dai->driver->suspend(cpu_dai); 631 } 632 633 /* close any waiting streams */ 634 for (i = 0; i < card->num_rtd; i++) 635 flush_delayed_work(&card->rtd[i].delayed_work); 636 637 for (i = 0; i < card->num_rtd; i++) { 638 639 if (card->rtd[i].dai_link->ignore_suspend) 640 continue; 641 642 snd_soc_dapm_stream_event(&card->rtd[i], 643 SNDRV_PCM_STREAM_PLAYBACK, 644 SND_SOC_DAPM_STREAM_SUSPEND); 645 646 snd_soc_dapm_stream_event(&card->rtd[i], 647 SNDRV_PCM_STREAM_CAPTURE, 648 SND_SOC_DAPM_STREAM_SUSPEND); 649 } 650 651 /* Recheck all endpoints too, their state is affected by suspend */ 652 dapm_mark_endpoints_dirty(card); 653 snd_soc_dapm_sync(&card->dapm); 654 655 /* suspend all CODECs */ 656 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 657 /* If there are paths active then the CODEC will be held with 658 * bias _ON and should not be suspended. */ 659 if (!codec->suspended) { 660 switch (codec->dapm.bias_level) { 661 case SND_SOC_BIAS_STANDBY: 662 /* 663 * If the CODEC is capable of idle 664 * bias off then being in STANDBY 665 * means it's doing something, 666 * otherwise fall through. 667 */ 668 if (codec->dapm.idle_bias_off) { 669 dev_dbg(codec->dev, 670 "ASoC: idle_bias_off CODEC on over suspend\n"); 671 break; 672 } 673 674 case SND_SOC_BIAS_OFF: 675 if (codec->driver->suspend) 676 codec->driver->suspend(codec); 677 codec->suspended = 1; 678 if (codec->component.regmap) 679 regcache_mark_dirty(codec->component.regmap); 680 /* deactivate pins to sleep state */ 681 pinctrl_pm_select_sleep_state(codec->dev); 682 break; 683 default: 684 dev_dbg(codec->dev, 685 "ASoC: CODEC is on over suspend\n"); 686 break; 687 } 688 } 689 } 690 691 for (i = 0; i < card->num_rtd; i++) { 692 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 693 694 if (card->rtd[i].dai_link->ignore_suspend) 695 continue; 696 697 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control) 698 cpu_dai->driver->suspend(cpu_dai); 699 700 /* deactivate pins to sleep state */ 701 pinctrl_pm_select_sleep_state(cpu_dai->dev); 702 } 703 704 if (card->suspend_post) 705 card->suspend_post(card); 706 707 return 0; 708 } 709 EXPORT_SYMBOL_GPL(snd_soc_suspend); 710 711 /* deferred resume work, so resume can complete before we finished 712 * setting our codec back up, which can be very slow on I2C 713 */ 714 static void soc_resume_deferred(struct work_struct *work) 715 { 716 struct snd_soc_card *card = 717 container_of(work, struct snd_soc_card, deferred_resume_work); 718 struct snd_soc_codec *codec; 719 int i, j; 720 721 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time, 722 * so userspace apps are blocked from touching us 723 */ 724 725 dev_dbg(card->dev, "ASoC: starting resume work\n"); 726 727 /* Bring us up into D2 so that DAPM starts enabling things */ 728 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2); 729 730 if (card->resume_pre) 731 card->resume_pre(card); 732 733 /* resume control bus DAIs */ 734 for (i = 0; i < card->num_rtd; i++) { 735 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 736 737 if (card->rtd[i].dai_link->ignore_suspend) 738 continue; 739 740 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control) 741 cpu_dai->driver->resume(cpu_dai); 742 } 743 744 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 745 if (codec->suspended) { 746 if (codec->driver->resume) 747 codec->driver->resume(codec); 748 codec->suspended = 0; 749 } 750 } 751 752 for (i = 0; i < card->num_rtd; i++) { 753 754 if (card->rtd[i].dai_link->ignore_suspend) 755 continue; 756 757 snd_soc_dapm_stream_event(&card->rtd[i], 758 SNDRV_PCM_STREAM_PLAYBACK, 759 SND_SOC_DAPM_STREAM_RESUME); 760 761 snd_soc_dapm_stream_event(&card->rtd[i], 762 SNDRV_PCM_STREAM_CAPTURE, 763 SND_SOC_DAPM_STREAM_RESUME); 764 } 765 766 /* unmute any active DACs */ 767 for (i = 0; i < card->num_rtd; i++) { 768 769 if (card->rtd[i].dai_link->ignore_suspend) 770 continue; 771 772 for (j = 0; j < card->rtd[i].num_codecs; j++) { 773 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 774 struct snd_soc_dai_driver *drv = dai->driver; 775 776 if (drv->ops->digital_mute && dai->playback_active) 777 drv->ops->digital_mute(dai, 0); 778 } 779 } 780 781 for (i = 0; i < card->num_rtd; i++) { 782 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 783 784 if (card->rtd[i].dai_link->ignore_suspend) 785 continue; 786 787 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control) 788 cpu_dai->driver->resume(cpu_dai); 789 } 790 791 if (card->resume_post) 792 card->resume_post(card); 793 794 dev_dbg(card->dev, "ASoC: resume work completed\n"); 795 796 /* userspace can access us now we are back as we were before */ 797 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0); 798 799 /* Recheck all endpoints too, their state is affected by suspend */ 800 dapm_mark_endpoints_dirty(card); 801 snd_soc_dapm_sync(&card->dapm); 802 } 803 804 /* powers up audio subsystem after a suspend */ 805 int snd_soc_resume(struct device *dev) 806 { 807 struct snd_soc_card *card = dev_get_drvdata(dev); 808 bool bus_control = false; 809 int i; 810 811 /* If the card is not initialized yet there is nothing to do */ 812 if (!card->instantiated) 813 return 0; 814 815 /* activate pins from sleep state */ 816 for (i = 0; i < card->num_rtd; i++) { 817 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 818 struct snd_soc_dai **codec_dais = rtd->codec_dais; 819 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 820 int j; 821 822 if (cpu_dai->active) 823 pinctrl_pm_select_default_state(cpu_dai->dev); 824 825 for (j = 0; j < rtd->num_codecs; j++) { 826 struct snd_soc_dai *codec_dai = codec_dais[j]; 827 if (codec_dai->active) 828 pinctrl_pm_select_default_state(codec_dai->dev); 829 } 830 } 831 832 /* 833 * DAIs that also act as the control bus master might have other drivers 834 * hanging off them so need to resume immediately. Other drivers don't 835 * have that problem and may take a substantial amount of time to resume 836 * due to I/O costs and anti-pop so handle them out of line. 837 */ 838 for (i = 0; i < card->num_rtd; i++) { 839 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 840 bus_control |= cpu_dai->driver->bus_control; 841 } 842 if (bus_control) { 843 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n"); 844 soc_resume_deferred(&card->deferred_resume_work); 845 } else { 846 dev_dbg(dev, "ASoC: Scheduling resume work\n"); 847 if (!schedule_work(&card->deferred_resume_work)) 848 dev_err(dev, "ASoC: resume work item may be lost\n"); 849 } 850 851 return 0; 852 } 853 EXPORT_SYMBOL_GPL(snd_soc_resume); 854 #else 855 #define snd_soc_suspend NULL 856 #define snd_soc_resume NULL 857 #endif 858 859 static const struct snd_soc_dai_ops null_dai_ops = { 860 }; 861 862 static struct snd_soc_component *soc_find_component( 863 const struct device_node *of_node, const char *name) 864 { 865 struct snd_soc_component *component; 866 867 lockdep_assert_held(&client_mutex); 868 869 list_for_each_entry(component, &component_list, list) { 870 if (of_node) { 871 if (component->dev->of_node == of_node) 872 return component; 873 } else if (strcmp(component->name, name) == 0) { 874 return component; 875 } 876 } 877 878 return NULL; 879 } 880 881 static struct snd_soc_dai *snd_soc_find_dai( 882 const struct snd_soc_dai_link_component *dlc) 883 { 884 struct snd_soc_component *component; 885 struct snd_soc_dai *dai; 886 struct device_node *component_of_node; 887 888 lockdep_assert_held(&client_mutex); 889 890 /* Find CPU DAI from registered DAIs*/ 891 list_for_each_entry(component, &component_list, list) { 892 component_of_node = component->dev->of_node; 893 if (!component_of_node && component->dev->parent) 894 component_of_node = component->dev->parent->of_node; 895 896 if (dlc->of_node && component_of_node != dlc->of_node) 897 continue; 898 if (dlc->name && strcmp(component->name, dlc->name)) 899 continue; 900 list_for_each_entry(dai, &component->dai_list, list) { 901 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)) 902 continue; 903 904 return dai; 905 } 906 } 907 908 return NULL; 909 } 910 911 static int soc_bind_dai_link(struct snd_soc_card *card, int num) 912 { 913 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 914 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 915 struct snd_soc_dai_link_component *codecs = dai_link->codecs; 916 struct snd_soc_dai_link_component cpu_dai_component; 917 struct snd_soc_dai **codec_dais = rtd->codec_dais; 918 struct snd_soc_platform *platform; 919 const char *platform_name; 920 int i; 921 922 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num); 923 924 cpu_dai_component.name = dai_link->cpu_name; 925 cpu_dai_component.of_node = dai_link->cpu_of_node; 926 cpu_dai_component.dai_name = dai_link->cpu_dai_name; 927 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component); 928 if (!rtd->cpu_dai) { 929 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n", 930 dai_link->cpu_dai_name); 931 return -EPROBE_DEFER; 932 } 933 934 rtd->num_codecs = dai_link->num_codecs; 935 936 /* Find CODEC from registered CODECs */ 937 for (i = 0; i < rtd->num_codecs; i++) { 938 codec_dais[i] = snd_soc_find_dai(&codecs[i]); 939 if (!codec_dais[i]) { 940 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n", 941 codecs[i].dai_name); 942 return -EPROBE_DEFER; 943 } 944 } 945 946 /* Single codec links expect codec and codec_dai in runtime data */ 947 rtd->codec_dai = codec_dais[0]; 948 rtd->codec = rtd->codec_dai->codec; 949 950 /* if there's no platform we match on the empty platform */ 951 platform_name = dai_link->platform_name; 952 if (!platform_name && !dai_link->platform_of_node) 953 platform_name = "snd-soc-dummy"; 954 955 /* find one from the set of registered platforms */ 956 list_for_each_entry(platform, &platform_list, list) { 957 if (dai_link->platform_of_node) { 958 if (platform->dev->of_node != 959 dai_link->platform_of_node) 960 continue; 961 } else { 962 if (strcmp(platform->component.name, platform_name)) 963 continue; 964 } 965 966 rtd->platform = platform; 967 } 968 if (!rtd->platform) { 969 dev_err(card->dev, "ASoC: platform %s not registered\n", 970 dai_link->platform_name); 971 return -EPROBE_DEFER; 972 } 973 974 card->num_rtd++; 975 976 return 0; 977 } 978 979 static void soc_remove_component(struct snd_soc_component *component) 980 { 981 if (!component->probed) 982 return; 983 984 /* This is a HACK and will be removed soon */ 985 if (component->codec) 986 list_del(&component->codec->card_list); 987 988 if (component->remove) 989 component->remove(component); 990 991 snd_soc_dapm_free(snd_soc_component_get_dapm(component)); 992 993 soc_cleanup_component_debugfs(component); 994 component->probed = 0; 995 module_put(component->dev->driver->owner); 996 } 997 998 static void soc_remove_dai(struct snd_soc_dai *dai, int order) 999 { 1000 int err; 1001 1002 if (dai && dai->probed && 1003 dai->driver->remove_order == order) { 1004 if (dai->driver->remove) { 1005 err = dai->driver->remove(dai); 1006 if (err < 0) 1007 dev_err(dai->dev, 1008 "ASoC: failed to remove %s: %d\n", 1009 dai->name, err); 1010 } 1011 dai->probed = 0; 1012 } 1013 } 1014 1015 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order) 1016 { 1017 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1018 int i; 1019 1020 /* unregister the rtd device */ 1021 if (rtd->dev_registered) { 1022 device_unregister(rtd->dev); 1023 rtd->dev_registered = 0; 1024 } 1025 1026 /* remove the CODEC DAI */ 1027 for (i = 0; i < rtd->num_codecs; i++) 1028 soc_remove_dai(rtd->codec_dais[i], order); 1029 1030 soc_remove_dai(rtd->cpu_dai, order); 1031 } 1032 1033 static void soc_remove_link_components(struct snd_soc_card *card, int num, 1034 int order) 1035 { 1036 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1038 struct snd_soc_platform *platform = rtd->platform; 1039 struct snd_soc_component *component; 1040 int i; 1041 1042 /* remove the platform */ 1043 if (platform && platform->component.driver->remove_order == order) 1044 soc_remove_component(&platform->component); 1045 1046 /* remove the CODEC-side CODEC */ 1047 for (i = 0; i < rtd->num_codecs; i++) { 1048 component = rtd->codec_dais[i]->component; 1049 if (component->driver->remove_order == order) 1050 soc_remove_component(component); 1051 } 1052 1053 /* remove any CPU-side CODEC */ 1054 if (cpu_dai) { 1055 if (cpu_dai->component->driver->remove_order == order) 1056 soc_remove_component(cpu_dai->component); 1057 } 1058 } 1059 1060 static void soc_remove_dai_links(struct snd_soc_card *card) 1061 { 1062 int dai, order; 1063 1064 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1065 order++) { 1066 for (dai = 0; dai < card->num_rtd; dai++) 1067 soc_remove_link_dais(card, dai, order); 1068 } 1069 1070 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1071 order++) { 1072 for (dai = 0; dai < card->num_rtd; dai++) 1073 soc_remove_link_components(card, dai, order); 1074 } 1075 1076 card->num_rtd = 0; 1077 } 1078 1079 static void soc_set_name_prefix(struct snd_soc_card *card, 1080 struct snd_soc_component *component) 1081 { 1082 int i; 1083 1084 if (card->codec_conf == NULL) 1085 return; 1086 1087 for (i = 0; i < card->num_configs; i++) { 1088 struct snd_soc_codec_conf *map = &card->codec_conf[i]; 1089 if (map->of_node && component->dev->of_node != map->of_node) 1090 continue; 1091 if (map->dev_name && strcmp(component->name, map->dev_name)) 1092 continue; 1093 component->name_prefix = map->name_prefix; 1094 break; 1095 } 1096 } 1097 1098 static int soc_probe_component(struct snd_soc_card *card, 1099 struct snd_soc_component *component) 1100 { 1101 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); 1102 struct snd_soc_dai *dai; 1103 int ret; 1104 1105 if (component->probed) 1106 return 0; 1107 1108 component->card = card; 1109 dapm->card = card; 1110 soc_set_name_prefix(card, component); 1111 1112 if (!try_module_get(component->dev->driver->owner)) 1113 return -ENODEV; 1114 1115 soc_init_component_debugfs(component); 1116 1117 if (component->dapm_widgets) { 1118 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets, 1119 component->num_dapm_widgets); 1120 1121 if (ret != 0) { 1122 dev_err(component->dev, 1123 "Failed to create new controls %d\n", ret); 1124 goto err_probe; 1125 } 1126 } 1127 1128 list_for_each_entry(dai, &component->dai_list, list) { 1129 ret = snd_soc_dapm_new_dai_widgets(dapm, dai); 1130 if (ret != 0) { 1131 dev_err(component->dev, 1132 "Failed to create DAI widgets %d\n", ret); 1133 goto err_probe; 1134 } 1135 } 1136 1137 if (component->probe) { 1138 ret = component->probe(component); 1139 if (ret < 0) { 1140 dev_err(component->dev, 1141 "ASoC: failed to probe component %d\n", ret); 1142 goto err_probe; 1143 } 1144 1145 WARN(dapm->idle_bias_off && 1146 dapm->bias_level != SND_SOC_BIAS_OFF, 1147 "codec %s can not start from non-off bias with idle_bias_off==1\n", 1148 component->name); 1149 } 1150 1151 if (component->controls) 1152 snd_soc_add_component_controls(component, component->controls, 1153 component->num_controls); 1154 if (component->dapm_routes) 1155 snd_soc_dapm_add_routes(dapm, component->dapm_routes, 1156 component->num_dapm_routes); 1157 1158 component->probed = 1; 1159 list_add(&dapm->list, &card->dapm_list); 1160 1161 /* This is a HACK and will be removed soon */ 1162 if (component->codec) 1163 list_add(&component->codec->card_list, &card->codec_dev_list); 1164 1165 return 0; 1166 1167 err_probe: 1168 soc_cleanup_component_debugfs(component); 1169 module_put(component->dev->driver->owner); 1170 1171 return ret; 1172 } 1173 1174 static void rtd_release(struct device *dev) 1175 { 1176 kfree(dev); 1177 } 1178 1179 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd, 1180 const char *name) 1181 { 1182 int ret = 0; 1183 1184 /* register the rtd device */ 1185 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL); 1186 if (!rtd->dev) 1187 return -ENOMEM; 1188 device_initialize(rtd->dev); 1189 rtd->dev->parent = rtd->card->dev; 1190 rtd->dev->release = rtd_release; 1191 rtd->dev->groups = soc_dev_attr_groups; 1192 dev_set_name(rtd->dev, "%s", name); 1193 dev_set_drvdata(rtd->dev, rtd); 1194 mutex_init(&rtd->pcm_mutex); 1195 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients); 1196 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients); 1197 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients); 1198 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients); 1199 ret = device_add(rtd->dev); 1200 if (ret < 0) { 1201 /* calling put_device() here to free the rtd->dev */ 1202 put_device(rtd->dev); 1203 dev_err(rtd->card->dev, 1204 "ASoC: failed to register runtime device: %d\n", ret); 1205 return ret; 1206 } 1207 rtd->dev_registered = 1; 1208 return 0; 1209 } 1210 1211 static int soc_probe_link_components(struct snd_soc_card *card, int num, 1212 int order) 1213 { 1214 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1215 struct snd_soc_platform *platform = rtd->platform; 1216 struct snd_soc_component *component; 1217 int i, ret; 1218 1219 /* probe the CPU-side component, if it is a CODEC */ 1220 component = rtd->cpu_dai->component; 1221 if (component->driver->probe_order == order) { 1222 ret = soc_probe_component(card, component); 1223 if (ret < 0) 1224 return ret; 1225 } 1226 1227 /* probe the CODEC-side components */ 1228 for (i = 0; i < rtd->num_codecs; i++) { 1229 component = rtd->codec_dais[i]->component; 1230 if (component->driver->probe_order == order) { 1231 ret = soc_probe_component(card, component); 1232 if (ret < 0) 1233 return ret; 1234 } 1235 } 1236 1237 /* probe the platform */ 1238 if (platform->component.driver->probe_order == order) { 1239 ret = soc_probe_component(card, &platform->component); 1240 if (ret < 0) 1241 return ret; 1242 } 1243 1244 return 0; 1245 } 1246 1247 static int soc_probe_dai(struct snd_soc_dai *dai, int order) 1248 { 1249 int ret; 1250 1251 if (!dai->probed && dai->driver->probe_order == order) { 1252 if (dai->driver->probe) { 1253 ret = dai->driver->probe(dai); 1254 if (ret < 0) { 1255 dev_err(dai->dev, 1256 "ASoC: failed to probe DAI %s: %d\n", 1257 dai->name, ret); 1258 return ret; 1259 } 1260 } 1261 1262 dai->probed = 1; 1263 } 1264 1265 return 0; 1266 } 1267 1268 static int soc_link_dai_widgets(struct snd_soc_card *card, 1269 struct snd_soc_dai_link *dai_link, 1270 struct snd_soc_pcm_runtime *rtd) 1271 { 1272 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1273 struct snd_soc_dai *codec_dai = rtd->codec_dai; 1274 struct snd_soc_dapm_widget *play_w, *capture_w; 1275 int ret; 1276 1277 if (rtd->num_codecs > 1) 1278 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n"); 1279 1280 /* link the DAI widgets */ 1281 play_w = codec_dai->playback_widget; 1282 capture_w = cpu_dai->capture_widget; 1283 if (play_w && capture_w) { 1284 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1285 dai_link->num_params, capture_w, 1286 play_w); 1287 if (ret != 0) { 1288 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1289 play_w->name, capture_w->name, ret); 1290 return ret; 1291 } 1292 } 1293 1294 play_w = cpu_dai->playback_widget; 1295 capture_w = codec_dai->capture_widget; 1296 if (play_w && capture_w) { 1297 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1298 dai_link->num_params, capture_w, 1299 play_w); 1300 if (ret != 0) { 1301 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1302 play_w->name, capture_w->name, ret); 1303 return ret; 1304 } 1305 } 1306 1307 return 0; 1308 } 1309 1310 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order) 1311 { 1312 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 1313 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1314 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1315 int i, ret; 1316 1317 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n", 1318 card->name, num, order); 1319 1320 /* set default power off timeout */ 1321 rtd->pmdown_time = pmdown_time; 1322 1323 ret = soc_probe_dai(cpu_dai, order); 1324 if (ret) 1325 return ret; 1326 1327 /* probe the CODEC DAI */ 1328 for (i = 0; i < rtd->num_codecs; i++) { 1329 ret = soc_probe_dai(rtd->codec_dais[i], order); 1330 if (ret) 1331 return ret; 1332 } 1333 1334 /* complete DAI probe during last probe */ 1335 if (order != SND_SOC_COMP_ORDER_LAST) 1336 return 0; 1337 1338 /* do machine specific initialization */ 1339 if (dai_link->init) { 1340 ret = dai_link->init(rtd); 1341 if (ret < 0) { 1342 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1343 dai_link->name, ret); 1344 return ret; 1345 } 1346 } 1347 1348 if (dai_link->dai_fmt) 1349 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt); 1350 1351 ret = soc_post_component_init(rtd, dai_link->name); 1352 if (ret) 1353 return ret; 1354 1355 #ifdef CONFIG_DEBUG_FS 1356 /* add DPCM sysfs entries */ 1357 if (dai_link->dynamic) 1358 soc_dpcm_debugfs_add(rtd); 1359 #endif 1360 1361 if (cpu_dai->driver->compress_dai) { 1362 /*create compress_device"*/ 1363 ret = soc_new_compress(rtd, num); 1364 if (ret < 0) { 1365 dev_err(card->dev, "ASoC: can't create compress %s\n", 1366 dai_link->stream_name); 1367 return ret; 1368 } 1369 } else { 1370 1371 if (!dai_link->params) { 1372 /* create the pcm */ 1373 ret = soc_new_pcm(rtd, num); 1374 if (ret < 0) { 1375 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n", 1376 dai_link->stream_name, ret); 1377 return ret; 1378 } 1379 } else { 1380 INIT_DELAYED_WORK(&rtd->delayed_work, 1381 codec2codec_close_delayed_work); 1382 1383 /* link the DAI widgets */ 1384 ret = soc_link_dai_widgets(card, dai_link, rtd); 1385 if (ret) 1386 return ret; 1387 } 1388 } 1389 1390 return 0; 1391 } 1392 1393 static int soc_bind_aux_dev(struct snd_soc_card *card, int num) 1394 { 1395 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1396 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1397 const char *name = aux_dev->codec_name; 1398 1399 rtd->component = soc_find_component(aux_dev->codec_of_node, name); 1400 if (!rtd->component) { 1401 if (aux_dev->codec_of_node) 1402 name = of_node_full_name(aux_dev->codec_of_node); 1403 1404 dev_err(card->dev, "ASoC: %s not registered\n", name); 1405 return -EPROBE_DEFER; 1406 } 1407 1408 /* 1409 * Some places still reference rtd->codec, so we have to keep that 1410 * initialized if the component is a CODEC. Once all those references 1411 * have been removed, this code can be removed as well. 1412 */ 1413 rtd->codec = rtd->component->codec; 1414 1415 return 0; 1416 } 1417 1418 static int soc_probe_aux_dev(struct snd_soc_card *card, int num) 1419 { 1420 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1421 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1422 int ret; 1423 1424 ret = soc_probe_component(card, rtd->component); 1425 if (ret < 0) 1426 return ret; 1427 1428 /* do machine specific initialization */ 1429 if (aux_dev->init) { 1430 ret = aux_dev->init(rtd->component); 1431 if (ret < 0) { 1432 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1433 aux_dev->name, ret); 1434 return ret; 1435 } 1436 } 1437 1438 return soc_post_component_init(rtd, aux_dev->name); 1439 } 1440 1441 static void soc_remove_aux_dev(struct snd_soc_card *card, int num) 1442 { 1443 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1444 struct snd_soc_component *component = rtd->component; 1445 1446 /* unregister the rtd device */ 1447 if (rtd->dev_registered) { 1448 device_unregister(rtd->dev); 1449 rtd->dev_registered = 0; 1450 } 1451 1452 if (component && component->probed) 1453 soc_remove_component(component); 1454 } 1455 1456 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec) 1457 { 1458 int ret; 1459 1460 if (codec->cache_init) 1461 return 0; 1462 1463 ret = snd_soc_cache_init(codec); 1464 if (ret < 0) { 1465 dev_err(codec->dev, 1466 "ASoC: Failed to set cache compression type: %d\n", 1467 ret); 1468 return ret; 1469 } 1470 codec->cache_init = 1; 1471 return 0; 1472 } 1473 1474 /** 1475 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime 1476 * @rtd: The runtime for which the DAI link format should be changed 1477 * @dai_fmt: The new DAI link format 1478 * 1479 * This function updates the DAI link format for all DAIs connected to the DAI 1480 * link for the specified runtime. 1481 * 1482 * Note: For setups with a static format set the dai_fmt field in the 1483 * corresponding snd_dai_link struct instead of using this function. 1484 * 1485 * Returns 0 on success, otherwise a negative error code. 1486 */ 1487 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd, 1488 unsigned int dai_fmt) 1489 { 1490 struct snd_soc_dai **codec_dais = rtd->codec_dais; 1491 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1492 unsigned int i; 1493 int ret; 1494 1495 for (i = 0; i < rtd->num_codecs; i++) { 1496 struct snd_soc_dai *codec_dai = codec_dais[i]; 1497 1498 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt); 1499 if (ret != 0 && ret != -ENOTSUPP) { 1500 dev_warn(codec_dai->dev, 1501 "ASoC: Failed to set DAI format: %d\n", ret); 1502 return ret; 1503 } 1504 } 1505 1506 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */ 1507 if (cpu_dai->codec) { 1508 unsigned int inv_dai_fmt; 1509 1510 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK; 1511 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { 1512 case SND_SOC_DAIFMT_CBM_CFM: 1513 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; 1514 break; 1515 case SND_SOC_DAIFMT_CBM_CFS: 1516 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM; 1517 break; 1518 case SND_SOC_DAIFMT_CBS_CFM: 1519 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS; 1520 break; 1521 case SND_SOC_DAIFMT_CBS_CFS: 1522 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM; 1523 break; 1524 } 1525 1526 dai_fmt = inv_dai_fmt; 1527 } 1528 1529 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt); 1530 if (ret != 0 && ret != -ENOTSUPP) { 1531 dev_warn(cpu_dai->dev, 1532 "ASoC: Failed to set DAI format: %d\n", ret); 1533 return ret; 1534 } 1535 1536 return 0; 1537 } 1538 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt); 1539 1540 static int snd_soc_instantiate_card(struct snd_soc_card *card) 1541 { 1542 struct snd_soc_codec *codec; 1543 int ret, i, order; 1544 1545 mutex_lock(&client_mutex); 1546 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT); 1547 1548 /* bind DAIs */ 1549 for (i = 0; i < card->num_links; i++) { 1550 ret = soc_bind_dai_link(card, i); 1551 if (ret != 0) 1552 goto base_error; 1553 } 1554 1555 /* bind aux_devs too */ 1556 for (i = 0; i < card->num_aux_devs; i++) { 1557 ret = soc_bind_aux_dev(card, i); 1558 if (ret != 0) 1559 goto base_error; 1560 } 1561 1562 /* initialize the register cache for each available codec */ 1563 list_for_each_entry(codec, &codec_list, list) { 1564 if (codec->cache_init) 1565 continue; 1566 ret = snd_soc_init_codec_cache(codec); 1567 if (ret < 0) 1568 goto base_error; 1569 } 1570 1571 /* card bind complete so register a sound card */ 1572 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 1573 card->owner, 0, &card->snd_card); 1574 if (ret < 0) { 1575 dev_err(card->dev, 1576 "ASoC: can't create sound card for card %s: %d\n", 1577 card->name, ret); 1578 goto base_error; 1579 } 1580 1581 soc_init_card_debugfs(card); 1582 1583 card->dapm.bias_level = SND_SOC_BIAS_OFF; 1584 card->dapm.dev = card->dev; 1585 card->dapm.card = card; 1586 list_add(&card->dapm.list, &card->dapm_list); 1587 1588 #ifdef CONFIG_DEBUG_FS 1589 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root); 1590 #endif 1591 1592 #ifdef CONFIG_PM_SLEEP 1593 /* deferred resume work */ 1594 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); 1595 #endif 1596 1597 if (card->dapm_widgets) 1598 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, 1599 card->num_dapm_widgets); 1600 1601 if (card->of_dapm_widgets) 1602 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets, 1603 card->num_of_dapm_widgets); 1604 1605 /* initialise the sound card only once */ 1606 if (card->probe) { 1607 ret = card->probe(card); 1608 if (ret < 0) 1609 goto card_probe_error; 1610 } 1611 1612 /* probe all components used by DAI links on this card */ 1613 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1614 order++) { 1615 for (i = 0; i < card->num_links; i++) { 1616 ret = soc_probe_link_components(card, i, order); 1617 if (ret < 0) { 1618 dev_err(card->dev, 1619 "ASoC: failed to instantiate card %d\n", 1620 ret); 1621 goto probe_dai_err; 1622 } 1623 } 1624 } 1625 1626 /* probe all DAI links on this card */ 1627 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1628 order++) { 1629 for (i = 0; i < card->num_links; i++) { 1630 ret = soc_probe_link_dais(card, i, order); 1631 if (ret < 0) { 1632 dev_err(card->dev, 1633 "ASoC: failed to instantiate card %d\n", 1634 ret); 1635 goto probe_dai_err; 1636 } 1637 } 1638 } 1639 1640 for (i = 0; i < card->num_aux_devs; i++) { 1641 ret = soc_probe_aux_dev(card, i); 1642 if (ret < 0) { 1643 dev_err(card->dev, 1644 "ASoC: failed to add auxiliary devices %d\n", 1645 ret); 1646 goto probe_aux_dev_err; 1647 } 1648 } 1649 1650 snd_soc_dapm_link_dai_widgets(card); 1651 snd_soc_dapm_connect_dai_link_widgets(card); 1652 1653 if (card->controls) 1654 snd_soc_add_card_controls(card, card->controls, card->num_controls); 1655 1656 if (card->dapm_routes) 1657 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes, 1658 card->num_dapm_routes); 1659 1660 if (card->of_dapm_routes) 1661 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes, 1662 card->num_of_dapm_routes); 1663 1664 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname), 1665 "%s", card->name); 1666 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname), 1667 "%s", card->long_name ? card->long_name : card->name); 1668 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver), 1669 "%s", card->driver_name ? card->driver_name : card->name); 1670 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) { 1671 switch (card->snd_card->driver[i]) { 1672 case '_': 1673 case '-': 1674 case '\0': 1675 break; 1676 default: 1677 if (!isalnum(card->snd_card->driver[i])) 1678 card->snd_card->driver[i] = '_'; 1679 break; 1680 } 1681 } 1682 1683 if (card->late_probe) { 1684 ret = card->late_probe(card); 1685 if (ret < 0) { 1686 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n", 1687 card->name, ret); 1688 goto probe_aux_dev_err; 1689 } 1690 } 1691 1692 snd_soc_dapm_new_widgets(card); 1693 1694 ret = snd_card_register(card->snd_card); 1695 if (ret < 0) { 1696 dev_err(card->dev, "ASoC: failed to register soundcard %d\n", 1697 ret); 1698 goto probe_aux_dev_err; 1699 } 1700 1701 card->instantiated = 1; 1702 snd_soc_dapm_sync(&card->dapm); 1703 mutex_unlock(&card->mutex); 1704 mutex_unlock(&client_mutex); 1705 1706 return 0; 1707 1708 probe_aux_dev_err: 1709 for (i = 0; i < card->num_aux_devs; i++) 1710 soc_remove_aux_dev(card, i); 1711 1712 probe_dai_err: 1713 soc_remove_dai_links(card); 1714 1715 card_probe_error: 1716 if (card->remove) 1717 card->remove(card); 1718 1719 soc_cleanup_card_debugfs(card); 1720 snd_card_free(card->snd_card); 1721 1722 base_error: 1723 mutex_unlock(&card->mutex); 1724 mutex_unlock(&client_mutex); 1725 1726 return ret; 1727 } 1728 1729 /* probes a new socdev */ 1730 static int soc_probe(struct platform_device *pdev) 1731 { 1732 struct snd_soc_card *card = platform_get_drvdata(pdev); 1733 1734 /* 1735 * no card, so machine driver should be registering card 1736 * we should not be here in that case so ret error 1737 */ 1738 if (!card) 1739 return -EINVAL; 1740 1741 dev_warn(&pdev->dev, 1742 "ASoC: machine %s should use snd_soc_register_card()\n", 1743 card->name); 1744 1745 /* Bodge while we unpick instantiation */ 1746 card->dev = &pdev->dev; 1747 1748 return snd_soc_register_card(card); 1749 } 1750 1751 static int soc_cleanup_card_resources(struct snd_soc_card *card) 1752 { 1753 int i; 1754 1755 /* make sure any delayed work runs */ 1756 for (i = 0; i < card->num_rtd; i++) { 1757 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1758 flush_delayed_work(&rtd->delayed_work); 1759 } 1760 1761 /* remove auxiliary devices */ 1762 for (i = 0; i < card->num_aux_devs; i++) 1763 soc_remove_aux_dev(card, i); 1764 1765 /* remove and free each DAI */ 1766 soc_remove_dai_links(card); 1767 1768 soc_cleanup_card_debugfs(card); 1769 1770 /* remove the card */ 1771 if (card->remove) 1772 card->remove(card); 1773 1774 snd_soc_dapm_free(&card->dapm); 1775 1776 snd_card_free(card->snd_card); 1777 return 0; 1778 1779 } 1780 1781 /* removes a socdev */ 1782 static int soc_remove(struct platform_device *pdev) 1783 { 1784 struct snd_soc_card *card = platform_get_drvdata(pdev); 1785 1786 snd_soc_unregister_card(card); 1787 return 0; 1788 } 1789 1790 int snd_soc_poweroff(struct device *dev) 1791 { 1792 struct snd_soc_card *card = dev_get_drvdata(dev); 1793 int i; 1794 1795 if (!card->instantiated) 1796 return 0; 1797 1798 /* Flush out pmdown_time work - we actually do want to run it 1799 * now, we're shutting down so no imminent restart. */ 1800 for (i = 0; i < card->num_rtd; i++) { 1801 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1802 flush_delayed_work(&rtd->delayed_work); 1803 } 1804 1805 snd_soc_dapm_shutdown(card); 1806 1807 /* deactivate pins to sleep state */ 1808 for (i = 0; i < card->num_rtd; i++) { 1809 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1810 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1811 int j; 1812 1813 pinctrl_pm_select_sleep_state(cpu_dai->dev); 1814 for (j = 0; j < rtd->num_codecs; j++) { 1815 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 1816 pinctrl_pm_select_sleep_state(codec_dai->dev); 1817 } 1818 } 1819 1820 return 0; 1821 } 1822 EXPORT_SYMBOL_GPL(snd_soc_poweroff); 1823 1824 const struct dev_pm_ops snd_soc_pm_ops = { 1825 .suspend = snd_soc_suspend, 1826 .resume = snd_soc_resume, 1827 .freeze = snd_soc_suspend, 1828 .thaw = snd_soc_resume, 1829 .poweroff = snd_soc_poweroff, 1830 .restore = snd_soc_resume, 1831 }; 1832 EXPORT_SYMBOL_GPL(snd_soc_pm_ops); 1833 1834 /* ASoC platform driver */ 1835 static struct platform_driver soc_driver = { 1836 .driver = { 1837 .name = "soc-audio", 1838 .pm = &snd_soc_pm_ops, 1839 }, 1840 .probe = soc_probe, 1841 .remove = soc_remove, 1842 }; 1843 1844 /** 1845 * snd_soc_cnew - create new control 1846 * @_template: control template 1847 * @data: control private data 1848 * @long_name: control long name 1849 * @prefix: control name prefix 1850 * 1851 * Create a new mixer control from a template control. 1852 * 1853 * Returns 0 for success, else error. 1854 */ 1855 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, 1856 void *data, const char *long_name, 1857 const char *prefix) 1858 { 1859 struct snd_kcontrol_new template; 1860 struct snd_kcontrol *kcontrol; 1861 char *name = NULL; 1862 1863 memcpy(&template, _template, sizeof(template)); 1864 template.index = 0; 1865 1866 if (!long_name) 1867 long_name = template.name; 1868 1869 if (prefix) { 1870 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name); 1871 if (!name) 1872 return NULL; 1873 1874 template.name = name; 1875 } else { 1876 template.name = long_name; 1877 } 1878 1879 kcontrol = snd_ctl_new1(&template, data); 1880 1881 kfree(name); 1882 1883 return kcontrol; 1884 } 1885 EXPORT_SYMBOL_GPL(snd_soc_cnew); 1886 1887 static int snd_soc_add_controls(struct snd_card *card, struct device *dev, 1888 const struct snd_kcontrol_new *controls, int num_controls, 1889 const char *prefix, void *data) 1890 { 1891 int err, i; 1892 1893 for (i = 0; i < num_controls; i++) { 1894 const struct snd_kcontrol_new *control = &controls[i]; 1895 err = snd_ctl_add(card, snd_soc_cnew(control, data, 1896 control->name, prefix)); 1897 if (err < 0) { 1898 dev_err(dev, "ASoC: Failed to add %s: %d\n", 1899 control->name, err); 1900 return err; 1901 } 1902 } 1903 1904 return 0; 1905 } 1906 1907 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card, 1908 const char *name) 1909 { 1910 struct snd_card *card = soc_card->snd_card; 1911 struct snd_kcontrol *kctl; 1912 1913 if (unlikely(!name)) 1914 return NULL; 1915 1916 list_for_each_entry(kctl, &card->controls, list) 1917 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) 1918 return kctl; 1919 return NULL; 1920 } 1921 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol); 1922 1923 /** 1924 * snd_soc_add_component_controls - Add an array of controls to a component. 1925 * 1926 * @component: Component to add controls to 1927 * @controls: Array of controls to add 1928 * @num_controls: Number of elements in the array 1929 * 1930 * Return: 0 for success, else error. 1931 */ 1932 int snd_soc_add_component_controls(struct snd_soc_component *component, 1933 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1934 { 1935 struct snd_card *card = component->card->snd_card; 1936 1937 return snd_soc_add_controls(card, component->dev, controls, 1938 num_controls, component->name_prefix, component); 1939 } 1940 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls); 1941 1942 /** 1943 * snd_soc_add_codec_controls - add an array of controls to a codec. 1944 * Convenience function to add a list of controls. Many codecs were 1945 * duplicating this code. 1946 * 1947 * @codec: codec to add controls to 1948 * @controls: array of controls to add 1949 * @num_controls: number of elements in the array 1950 * 1951 * Return 0 for success, else error. 1952 */ 1953 int snd_soc_add_codec_controls(struct snd_soc_codec *codec, 1954 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1955 { 1956 return snd_soc_add_component_controls(&codec->component, controls, 1957 num_controls); 1958 } 1959 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls); 1960 1961 /** 1962 * snd_soc_add_platform_controls - add an array of controls to a platform. 1963 * Convenience function to add a list of controls. 1964 * 1965 * @platform: platform to add controls to 1966 * @controls: array of controls to add 1967 * @num_controls: number of elements in the array 1968 * 1969 * Return 0 for success, else error. 1970 */ 1971 int snd_soc_add_platform_controls(struct snd_soc_platform *platform, 1972 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1973 { 1974 return snd_soc_add_component_controls(&platform->component, controls, 1975 num_controls); 1976 } 1977 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls); 1978 1979 /** 1980 * snd_soc_add_card_controls - add an array of controls to a SoC card. 1981 * Convenience function to add a list of controls. 1982 * 1983 * @soc_card: SoC card to add controls to 1984 * @controls: array of controls to add 1985 * @num_controls: number of elements in the array 1986 * 1987 * Return 0 for success, else error. 1988 */ 1989 int snd_soc_add_card_controls(struct snd_soc_card *soc_card, 1990 const struct snd_kcontrol_new *controls, int num_controls) 1991 { 1992 struct snd_card *card = soc_card->snd_card; 1993 1994 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls, 1995 NULL, soc_card); 1996 } 1997 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls); 1998 1999 /** 2000 * snd_soc_add_dai_controls - add an array of controls to a DAI. 2001 * Convienience function to add a list of controls. 2002 * 2003 * @dai: DAI to add controls to 2004 * @controls: array of controls to add 2005 * @num_controls: number of elements in the array 2006 * 2007 * Return 0 for success, else error. 2008 */ 2009 int snd_soc_add_dai_controls(struct snd_soc_dai *dai, 2010 const struct snd_kcontrol_new *controls, int num_controls) 2011 { 2012 struct snd_card *card = dai->component->card->snd_card; 2013 2014 return snd_soc_add_controls(card, dai->dev, controls, num_controls, 2015 NULL, dai); 2016 } 2017 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls); 2018 2019 /** 2020 * snd_soc_dai_set_sysclk - configure DAI system or master clock. 2021 * @dai: DAI 2022 * @clk_id: DAI specific clock ID 2023 * @freq: new clock frequency in Hz 2024 * @dir: new clock direction - input/output. 2025 * 2026 * Configures the DAI master (MCLK) or system (SYSCLK) clocking. 2027 */ 2028 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, 2029 unsigned int freq, int dir) 2030 { 2031 if (dai->driver && dai->driver->ops->set_sysclk) 2032 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir); 2033 else if (dai->codec && dai->codec->driver->set_sysclk) 2034 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0, 2035 freq, dir); 2036 else 2037 return -ENOTSUPP; 2038 } 2039 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); 2040 2041 /** 2042 * snd_soc_codec_set_sysclk - configure CODEC system or master clock. 2043 * @codec: CODEC 2044 * @clk_id: DAI specific clock ID 2045 * @source: Source for the clock 2046 * @freq: new clock frequency in Hz 2047 * @dir: new clock direction - input/output. 2048 * 2049 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking. 2050 */ 2051 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id, 2052 int source, unsigned int freq, int dir) 2053 { 2054 if (codec->driver->set_sysclk) 2055 return codec->driver->set_sysclk(codec, clk_id, source, 2056 freq, dir); 2057 else 2058 return -ENOTSUPP; 2059 } 2060 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk); 2061 2062 /** 2063 * snd_soc_dai_set_clkdiv - configure DAI clock dividers. 2064 * @dai: DAI 2065 * @div_id: DAI specific clock divider ID 2066 * @div: new clock divisor. 2067 * 2068 * Configures the clock dividers. This is used to derive the best DAI bit and 2069 * frame clocks from the system or master clock. It's best to set the DAI bit 2070 * and frame clocks as low as possible to save system power. 2071 */ 2072 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, 2073 int div_id, int div) 2074 { 2075 if (dai->driver && dai->driver->ops->set_clkdiv) 2076 return dai->driver->ops->set_clkdiv(dai, div_id, div); 2077 else 2078 return -EINVAL; 2079 } 2080 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); 2081 2082 /** 2083 * snd_soc_dai_set_pll - configure DAI PLL. 2084 * @dai: DAI 2085 * @pll_id: DAI specific PLL ID 2086 * @source: DAI specific source for the PLL 2087 * @freq_in: PLL input clock frequency in Hz 2088 * @freq_out: requested PLL output clock frequency in Hz 2089 * 2090 * Configures and enables PLL to generate output clock based on input clock. 2091 */ 2092 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source, 2093 unsigned int freq_in, unsigned int freq_out) 2094 { 2095 if (dai->driver && dai->driver->ops->set_pll) 2096 return dai->driver->ops->set_pll(dai, pll_id, source, 2097 freq_in, freq_out); 2098 else if (dai->codec && dai->codec->driver->set_pll) 2099 return dai->codec->driver->set_pll(dai->codec, pll_id, source, 2100 freq_in, freq_out); 2101 else 2102 return -EINVAL; 2103 } 2104 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); 2105 2106 /* 2107 * snd_soc_codec_set_pll - configure codec PLL. 2108 * @codec: CODEC 2109 * @pll_id: DAI specific PLL ID 2110 * @source: DAI specific source for the PLL 2111 * @freq_in: PLL input clock frequency in Hz 2112 * @freq_out: requested PLL output clock frequency in Hz 2113 * 2114 * Configures and enables PLL to generate output clock based on input clock. 2115 */ 2116 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source, 2117 unsigned int freq_in, unsigned int freq_out) 2118 { 2119 if (codec->driver->set_pll) 2120 return codec->driver->set_pll(codec, pll_id, source, 2121 freq_in, freq_out); 2122 else 2123 return -EINVAL; 2124 } 2125 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll); 2126 2127 /** 2128 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio. 2129 * @dai: DAI 2130 * @ratio Ratio of BCLK to Sample rate. 2131 * 2132 * Configures the DAI for a preset BCLK to sample rate ratio. 2133 */ 2134 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio) 2135 { 2136 if (dai->driver && dai->driver->ops->set_bclk_ratio) 2137 return dai->driver->ops->set_bclk_ratio(dai, ratio); 2138 else 2139 return -EINVAL; 2140 } 2141 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio); 2142 2143 /** 2144 * snd_soc_dai_set_fmt - configure DAI hardware audio format. 2145 * @dai: DAI 2146 * @fmt: SND_SOC_DAIFMT_ format value. 2147 * 2148 * Configures the DAI hardware format and clocking. 2149 */ 2150 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 2151 { 2152 if (dai->driver == NULL) 2153 return -EINVAL; 2154 if (dai->driver->ops->set_fmt == NULL) 2155 return -ENOTSUPP; 2156 return dai->driver->ops->set_fmt(dai, fmt); 2157 } 2158 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); 2159 2160 /** 2161 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask. 2162 * @slots: Number of slots in use. 2163 * @tx_mask: bitmask representing active TX slots. 2164 * @rx_mask: bitmask representing active RX slots. 2165 * 2166 * Generates the TDM tx and rx slot default masks for DAI. 2167 */ 2168 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots, 2169 unsigned int *tx_mask, 2170 unsigned int *rx_mask) 2171 { 2172 if (*tx_mask || *rx_mask) 2173 return 0; 2174 2175 if (!slots) 2176 return -EINVAL; 2177 2178 *tx_mask = (1 << slots) - 1; 2179 *rx_mask = (1 << slots) - 1; 2180 2181 return 0; 2182 } 2183 2184 /** 2185 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation 2186 * @dai: The DAI to configure 2187 * @tx_mask: bitmask representing active TX slots. 2188 * @rx_mask: bitmask representing active RX slots. 2189 * @slots: Number of slots in use. 2190 * @slot_width: Width in bits for each slot. 2191 * 2192 * This function configures the specified DAI for TDM operation. @slot contains 2193 * the total number of slots of the TDM stream and @slot_with the width of each 2194 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the 2195 * active slots of the TDM stream for the specified DAI, i.e. which slots the 2196 * DAI should write to or read from. If a bit is set the corresponding slot is 2197 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to 2198 * the first slot, bit 1 to the second slot and so on. The first active slot 2199 * maps to the first channel of the DAI, the second active slot to the second 2200 * channel and so on. 2201 * 2202 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask, 2203 * @rx_mask and @slot_width will be ignored. 2204 * 2205 * Returns 0 on success, a negative error code otherwise. 2206 */ 2207 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, 2208 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) 2209 { 2210 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask) 2211 dai->driver->ops->xlate_tdm_slot_mask(slots, 2212 &tx_mask, &rx_mask); 2213 else 2214 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask); 2215 2216 dai->tx_mask = tx_mask; 2217 dai->rx_mask = rx_mask; 2218 2219 if (dai->driver && dai->driver->ops->set_tdm_slot) 2220 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask, 2221 slots, slot_width); 2222 else 2223 return -ENOTSUPP; 2224 } 2225 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); 2226 2227 /** 2228 * snd_soc_dai_set_channel_map - configure DAI audio channel map 2229 * @dai: DAI 2230 * @tx_num: how many TX channels 2231 * @tx_slot: pointer to an array which imply the TX slot number channel 2232 * 0~num-1 uses 2233 * @rx_num: how many RX channels 2234 * @rx_slot: pointer to an array which imply the RX slot number channel 2235 * 0~num-1 uses 2236 * 2237 * configure the relationship between channel number and TDM slot number. 2238 */ 2239 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai, 2240 unsigned int tx_num, unsigned int *tx_slot, 2241 unsigned int rx_num, unsigned int *rx_slot) 2242 { 2243 if (dai->driver && dai->driver->ops->set_channel_map) 2244 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot, 2245 rx_num, rx_slot); 2246 else 2247 return -EINVAL; 2248 } 2249 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map); 2250 2251 /** 2252 * snd_soc_dai_set_tristate - configure DAI system or master clock. 2253 * @dai: DAI 2254 * @tristate: tristate enable 2255 * 2256 * Tristates the DAI so that others can use it. 2257 */ 2258 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) 2259 { 2260 if (dai->driver && dai->driver->ops->set_tristate) 2261 return dai->driver->ops->set_tristate(dai, tristate); 2262 else 2263 return -EINVAL; 2264 } 2265 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); 2266 2267 /** 2268 * snd_soc_dai_digital_mute - configure DAI system or master clock. 2269 * @dai: DAI 2270 * @mute: mute enable 2271 * @direction: stream to mute 2272 * 2273 * Mutes the DAI DAC. 2274 */ 2275 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute, 2276 int direction) 2277 { 2278 if (!dai->driver) 2279 return -ENOTSUPP; 2280 2281 if (dai->driver->ops->mute_stream) 2282 return dai->driver->ops->mute_stream(dai, mute, direction); 2283 else if (direction == SNDRV_PCM_STREAM_PLAYBACK && 2284 dai->driver->ops->digital_mute) 2285 return dai->driver->ops->digital_mute(dai, mute); 2286 else 2287 return -ENOTSUPP; 2288 } 2289 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); 2290 2291 static int snd_soc_init_multicodec(struct snd_soc_card *card, 2292 struct snd_soc_dai_link *dai_link) 2293 { 2294 /* Legacy codec/codec_dai link is a single entry in multicodec */ 2295 if (dai_link->codec_name || dai_link->codec_of_node || 2296 dai_link->codec_dai_name) { 2297 dai_link->num_codecs = 1; 2298 2299 dai_link->codecs = devm_kzalloc(card->dev, 2300 sizeof(struct snd_soc_dai_link_component), 2301 GFP_KERNEL); 2302 if (!dai_link->codecs) 2303 return -ENOMEM; 2304 2305 dai_link->codecs[0].name = dai_link->codec_name; 2306 dai_link->codecs[0].of_node = dai_link->codec_of_node; 2307 dai_link->codecs[0].dai_name = dai_link->codec_dai_name; 2308 } 2309 2310 if (!dai_link->codecs) { 2311 dev_err(card->dev, "ASoC: DAI link has no CODECs\n"); 2312 return -EINVAL; 2313 } 2314 2315 return 0; 2316 } 2317 2318 /** 2319 * snd_soc_register_card - Register a card with the ASoC core 2320 * 2321 * @card: Card to register 2322 * 2323 */ 2324 int snd_soc_register_card(struct snd_soc_card *card) 2325 { 2326 int i, j, ret; 2327 2328 if (!card->name || !card->dev) 2329 return -EINVAL; 2330 2331 for (i = 0; i < card->num_links; i++) { 2332 struct snd_soc_dai_link *link = &card->dai_link[i]; 2333 2334 ret = snd_soc_init_multicodec(card, link); 2335 if (ret) { 2336 dev_err(card->dev, "ASoC: failed to init multicodec\n"); 2337 return ret; 2338 } 2339 2340 for (j = 0; j < link->num_codecs; j++) { 2341 /* 2342 * Codec must be specified by 1 of name or OF node, 2343 * not both or neither. 2344 */ 2345 if (!!link->codecs[j].name == 2346 !!link->codecs[j].of_node) { 2347 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n", 2348 link->name); 2349 return -EINVAL; 2350 } 2351 /* Codec DAI name must be specified */ 2352 if (!link->codecs[j].dai_name) { 2353 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n", 2354 link->name); 2355 return -EINVAL; 2356 } 2357 } 2358 2359 /* 2360 * Platform may be specified by either name or OF node, but 2361 * can be left unspecified, and a dummy platform will be used. 2362 */ 2363 if (link->platform_name && link->platform_of_node) { 2364 dev_err(card->dev, 2365 "ASoC: Both platform name/of_node are set for %s\n", 2366 link->name); 2367 return -EINVAL; 2368 } 2369 2370 /* 2371 * CPU device may be specified by either name or OF node, but 2372 * can be left unspecified, and will be matched based on DAI 2373 * name alone.. 2374 */ 2375 if (link->cpu_name && link->cpu_of_node) { 2376 dev_err(card->dev, 2377 "ASoC: Neither/both cpu name/of_node are set for %s\n", 2378 link->name); 2379 return -EINVAL; 2380 } 2381 /* 2382 * At least one of CPU DAI name or CPU device name/node must be 2383 * specified 2384 */ 2385 if (!link->cpu_dai_name && 2386 !(link->cpu_name || link->cpu_of_node)) { 2387 dev_err(card->dev, 2388 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n", 2389 link->name); 2390 return -EINVAL; 2391 } 2392 } 2393 2394 dev_set_drvdata(card->dev, card); 2395 2396 snd_soc_initialize_card_lists(card); 2397 2398 card->rtd = devm_kzalloc(card->dev, 2399 sizeof(struct snd_soc_pcm_runtime) * 2400 (card->num_links + card->num_aux_devs), 2401 GFP_KERNEL); 2402 if (card->rtd == NULL) 2403 return -ENOMEM; 2404 card->num_rtd = 0; 2405 card->rtd_aux = &card->rtd[card->num_links]; 2406 2407 for (i = 0; i < card->num_links; i++) { 2408 card->rtd[i].card = card; 2409 card->rtd[i].dai_link = &card->dai_link[i]; 2410 card->rtd[i].codec_dais = devm_kzalloc(card->dev, 2411 sizeof(struct snd_soc_dai *) * 2412 (card->rtd[i].dai_link->num_codecs), 2413 GFP_KERNEL); 2414 if (card->rtd[i].codec_dais == NULL) 2415 return -ENOMEM; 2416 } 2417 2418 for (i = 0; i < card->num_aux_devs; i++) 2419 card->rtd_aux[i].card = card; 2420 2421 INIT_LIST_HEAD(&card->dapm_dirty); 2422 INIT_LIST_HEAD(&card->dobj_list); 2423 card->instantiated = 0; 2424 mutex_init(&card->mutex); 2425 mutex_init(&card->dapm_mutex); 2426 2427 ret = snd_soc_instantiate_card(card); 2428 if (ret != 0) 2429 return ret; 2430 2431 /* deactivate pins to sleep state */ 2432 for (i = 0; i < card->num_rtd; i++) { 2433 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 2434 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2435 int j; 2436 2437 for (j = 0; j < rtd->num_codecs; j++) { 2438 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 2439 if (!codec_dai->active) 2440 pinctrl_pm_select_sleep_state(codec_dai->dev); 2441 } 2442 2443 if (!cpu_dai->active) 2444 pinctrl_pm_select_sleep_state(cpu_dai->dev); 2445 } 2446 2447 return ret; 2448 } 2449 EXPORT_SYMBOL_GPL(snd_soc_register_card); 2450 2451 /** 2452 * snd_soc_unregister_card - Unregister a card with the ASoC core 2453 * 2454 * @card: Card to unregister 2455 * 2456 */ 2457 int snd_soc_unregister_card(struct snd_soc_card *card) 2458 { 2459 if (card->instantiated) { 2460 card->instantiated = false; 2461 snd_soc_dapm_shutdown(card); 2462 soc_cleanup_card_resources(card); 2463 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name); 2464 } 2465 2466 return 0; 2467 } 2468 EXPORT_SYMBOL_GPL(snd_soc_unregister_card); 2469 2470 /* 2471 * Simplify DAI link configuration by removing ".-1" from device names 2472 * and sanitizing names. 2473 */ 2474 static char *fmt_single_name(struct device *dev, int *id) 2475 { 2476 char *found, name[NAME_SIZE]; 2477 int id1, id2; 2478 2479 if (dev_name(dev) == NULL) 2480 return NULL; 2481 2482 strlcpy(name, dev_name(dev), NAME_SIZE); 2483 2484 /* are we a "%s.%d" name (platform and SPI components) */ 2485 found = strstr(name, dev->driver->name); 2486 if (found) { 2487 /* get ID */ 2488 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) { 2489 2490 /* discard ID from name if ID == -1 */ 2491 if (*id == -1) 2492 found[strlen(dev->driver->name)] = '\0'; 2493 } 2494 2495 } else { 2496 /* I2C component devices are named "bus-addr" */ 2497 if (sscanf(name, "%x-%x", &id1, &id2) == 2) { 2498 char tmp[NAME_SIZE]; 2499 2500 /* create unique ID number from I2C addr and bus */ 2501 *id = ((id1 & 0xffff) << 16) + id2; 2502 2503 /* sanitize component name for DAI link creation */ 2504 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name); 2505 strlcpy(name, tmp, NAME_SIZE); 2506 } else 2507 *id = 0; 2508 } 2509 2510 return kstrdup(name, GFP_KERNEL); 2511 } 2512 2513 /* 2514 * Simplify DAI link naming for single devices with multiple DAIs by removing 2515 * any ".-1" and using the DAI name (instead of device name). 2516 */ 2517 static inline char *fmt_multiple_name(struct device *dev, 2518 struct snd_soc_dai_driver *dai_drv) 2519 { 2520 if (dai_drv->name == NULL) { 2521 dev_err(dev, 2522 "ASoC: error - multiple DAI %s registered with no name\n", 2523 dev_name(dev)); 2524 return NULL; 2525 } 2526 2527 return kstrdup(dai_drv->name, GFP_KERNEL); 2528 } 2529 2530 /** 2531 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core 2532 * 2533 * @component: The component for which the DAIs should be unregistered 2534 */ 2535 static void snd_soc_unregister_dais(struct snd_soc_component *component) 2536 { 2537 struct snd_soc_dai *dai, *_dai; 2538 2539 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) { 2540 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n", 2541 dai->name); 2542 list_del(&dai->list); 2543 kfree(dai->name); 2544 kfree(dai); 2545 } 2546 } 2547 2548 /** 2549 * snd_soc_register_dais - Register a DAI with the ASoC core 2550 * 2551 * @component: The component the DAIs are registered for 2552 * @dai_drv: DAI driver to use for the DAIs 2553 * @count: Number of DAIs 2554 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the 2555 * parent's name. 2556 */ 2557 static int snd_soc_register_dais(struct snd_soc_component *component, 2558 struct snd_soc_dai_driver *dai_drv, size_t count, 2559 bool legacy_dai_naming) 2560 { 2561 struct device *dev = component->dev; 2562 struct snd_soc_dai *dai; 2563 unsigned int i; 2564 int ret; 2565 2566 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count); 2567 2568 component->dai_drv = dai_drv; 2569 component->num_dai = count; 2570 2571 for (i = 0; i < count; i++) { 2572 2573 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL); 2574 if (dai == NULL) { 2575 ret = -ENOMEM; 2576 goto err; 2577 } 2578 2579 /* 2580 * Back in the old days when we still had component-less DAIs, 2581 * instead of having a static name, component-less DAIs would 2582 * inherit the name of the parent device so it is possible to 2583 * register multiple instances of the DAI. We still need to keep 2584 * the same naming style even though those DAIs are not 2585 * component-less anymore. 2586 */ 2587 if (count == 1 && legacy_dai_naming && 2588 (dai_drv[i].id == 0 || dai_drv[i].name == NULL)) { 2589 dai->name = fmt_single_name(dev, &dai->id); 2590 } else { 2591 dai->name = fmt_multiple_name(dev, &dai_drv[i]); 2592 if (dai_drv[i].id) 2593 dai->id = dai_drv[i].id; 2594 else 2595 dai->id = i; 2596 } 2597 if (dai->name == NULL) { 2598 kfree(dai); 2599 ret = -ENOMEM; 2600 goto err; 2601 } 2602 2603 dai->component = component; 2604 dai->dev = dev; 2605 dai->driver = &dai_drv[i]; 2606 if (!dai->driver->ops) 2607 dai->driver->ops = &null_dai_ops; 2608 2609 list_add(&dai->list, &component->dai_list); 2610 2611 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name); 2612 } 2613 2614 return 0; 2615 2616 err: 2617 snd_soc_unregister_dais(component); 2618 2619 return ret; 2620 } 2621 2622 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, 2623 enum snd_soc_dapm_type type, int subseq) 2624 { 2625 struct snd_soc_component *component = dapm->component; 2626 2627 component->driver->seq_notifier(component, type, subseq); 2628 } 2629 2630 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm, 2631 int event) 2632 { 2633 struct snd_soc_component *component = dapm->component; 2634 2635 return component->driver->stream_event(component, event); 2636 } 2637 2638 static int snd_soc_component_initialize(struct snd_soc_component *component, 2639 const struct snd_soc_component_driver *driver, struct device *dev) 2640 { 2641 struct snd_soc_dapm_context *dapm; 2642 2643 component->name = fmt_single_name(dev, &component->id); 2644 if (!component->name) { 2645 dev_err(dev, "ASoC: Failed to allocate name\n"); 2646 return -ENOMEM; 2647 } 2648 2649 component->dev = dev; 2650 component->driver = driver; 2651 component->probe = component->driver->probe; 2652 component->remove = component->driver->remove; 2653 2654 if (!component->dapm_ptr) 2655 component->dapm_ptr = &component->dapm; 2656 2657 dapm = component->dapm_ptr; 2658 dapm->dev = dev; 2659 dapm->component = component; 2660 dapm->bias_level = SND_SOC_BIAS_OFF; 2661 dapm->idle_bias_off = true; 2662 if (driver->seq_notifier) 2663 dapm->seq_notifier = snd_soc_component_seq_notifier; 2664 if (driver->stream_event) 2665 dapm->stream_event = snd_soc_component_stream_event; 2666 2667 component->controls = driver->controls; 2668 component->num_controls = driver->num_controls; 2669 component->dapm_widgets = driver->dapm_widgets; 2670 component->num_dapm_widgets = driver->num_dapm_widgets; 2671 component->dapm_routes = driver->dapm_routes; 2672 component->num_dapm_routes = driver->num_dapm_routes; 2673 2674 INIT_LIST_HEAD(&component->dai_list); 2675 mutex_init(&component->io_mutex); 2676 2677 return 0; 2678 } 2679 2680 static void snd_soc_component_setup_regmap(struct snd_soc_component *component) 2681 { 2682 int val_bytes = regmap_get_val_bytes(component->regmap); 2683 2684 /* Errors are legitimate for non-integer byte multiples */ 2685 if (val_bytes > 0) 2686 component->val_bytes = val_bytes; 2687 } 2688 2689 #ifdef CONFIG_REGMAP 2690 2691 /** 2692 * snd_soc_component_init_regmap() - Initialize regmap instance for the component 2693 * @component: The component for which to initialize the regmap instance 2694 * @regmap: The regmap instance that should be used by the component 2695 * 2696 * This function allows deferred assignment of the regmap instance that is 2697 * associated with the component. Only use this if the regmap instance is not 2698 * yet ready when the component is registered. The function must also be called 2699 * before the first IO attempt of the component. 2700 */ 2701 void snd_soc_component_init_regmap(struct snd_soc_component *component, 2702 struct regmap *regmap) 2703 { 2704 component->regmap = regmap; 2705 snd_soc_component_setup_regmap(component); 2706 } 2707 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap); 2708 2709 /** 2710 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component 2711 * @component: The component for which to de-initialize the regmap instance 2712 * 2713 * Calls regmap_exit() on the regmap instance associated to the component and 2714 * removes the regmap instance from the component. 2715 * 2716 * This function should only be used if snd_soc_component_init_regmap() was used 2717 * to initialize the regmap instance. 2718 */ 2719 void snd_soc_component_exit_regmap(struct snd_soc_component *component) 2720 { 2721 regmap_exit(component->regmap); 2722 component->regmap = NULL; 2723 } 2724 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap); 2725 2726 #endif 2727 2728 static void snd_soc_component_add_unlocked(struct snd_soc_component *component) 2729 { 2730 if (!component->write && !component->read) { 2731 if (!component->regmap) 2732 component->regmap = dev_get_regmap(component->dev, NULL); 2733 if (component->regmap) 2734 snd_soc_component_setup_regmap(component); 2735 } 2736 2737 list_add(&component->list, &component_list); 2738 INIT_LIST_HEAD(&component->dobj_list); 2739 } 2740 2741 static void snd_soc_component_add(struct snd_soc_component *component) 2742 { 2743 mutex_lock(&client_mutex); 2744 snd_soc_component_add_unlocked(component); 2745 mutex_unlock(&client_mutex); 2746 } 2747 2748 static void snd_soc_component_cleanup(struct snd_soc_component *component) 2749 { 2750 snd_soc_unregister_dais(component); 2751 kfree(component->name); 2752 } 2753 2754 static void snd_soc_component_del_unlocked(struct snd_soc_component *component) 2755 { 2756 list_del(&component->list); 2757 } 2758 2759 int snd_soc_register_component(struct device *dev, 2760 const struct snd_soc_component_driver *cmpnt_drv, 2761 struct snd_soc_dai_driver *dai_drv, 2762 int num_dai) 2763 { 2764 struct snd_soc_component *cmpnt; 2765 int ret; 2766 2767 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL); 2768 if (!cmpnt) { 2769 dev_err(dev, "ASoC: Failed to allocate memory\n"); 2770 return -ENOMEM; 2771 } 2772 2773 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev); 2774 if (ret) 2775 goto err_free; 2776 2777 cmpnt->ignore_pmdown_time = true; 2778 cmpnt->registered_as_component = true; 2779 2780 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true); 2781 if (ret < 0) { 2782 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret); 2783 goto err_cleanup; 2784 } 2785 2786 snd_soc_component_add(cmpnt); 2787 2788 return 0; 2789 2790 err_cleanup: 2791 snd_soc_component_cleanup(cmpnt); 2792 err_free: 2793 kfree(cmpnt); 2794 return ret; 2795 } 2796 EXPORT_SYMBOL_GPL(snd_soc_register_component); 2797 2798 /** 2799 * snd_soc_unregister_component - Unregister a component from the ASoC core 2800 * 2801 */ 2802 void snd_soc_unregister_component(struct device *dev) 2803 { 2804 struct snd_soc_component *cmpnt; 2805 2806 mutex_lock(&client_mutex); 2807 list_for_each_entry(cmpnt, &component_list, list) { 2808 if (dev == cmpnt->dev && cmpnt->registered_as_component) 2809 goto found; 2810 } 2811 mutex_unlock(&client_mutex); 2812 return; 2813 2814 found: 2815 snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL); 2816 snd_soc_component_del_unlocked(cmpnt); 2817 mutex_unlock(&client_mutex); 2818 snd_soc_component_cleanup(cmpnt); 2819 kfree(cmpnt); 2820 } 2821 EXPORT_SYMBOL_GPL(snd_soc_unregister_component); 2822 2823 static int snd_soc_platform_drv_probe(struct snd_soc_component *component) 2824 { 2825 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2826 2827 return platform->driver->probe(platform); 2828 } 2829 2830 static void snd_soc_platform_drv_remove(struct snd_soc_component *component) 2831 { 2832 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2833 2834 platform->driver->remove(platform); 2835 } 2836 2837 /** 2838 * snd_soc_add_platform - Add a platform to the ASoC core 2839 * @dev: The parent device for the platform 2840 * @platform: The platform to add 2841 * @platform_driver: The driver for the platform 2842 */ 2843 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform, 2844 const struct snd_soc_platform_driver *platform_drv) 2845 { 2846 int ret; 2847 2848 ret = snd_soc_component_initialize(&platform->component, 2849 &platform_drv->component_driver, dev); 2850 if (ret) 2851 return ret; 2852 2853 platform->dev = dev; 2854 platform->driver = platform_drv; 2855 2856 if (platform_drv->probe) 2857 platform->component.probe = snd_soc_platform_drv_probe; 2858 if (platform_drv->remove) 2859 platform->component.remove = snd_soc_platform_drv_remove; 2860 2861 #ifdef CONFIG_DEBUG_FS 2862 platform->component.debugfs_prefix = "platform"; 2863 #endif 2864 2865 mutex_lock(&client_mutex); 2866 snd_soc_component_add_unlocked(&platform->component); 2867 list_add(&platform->list, &platform_list); 2868 mutex_unlock(&client_mutex); 2869 2870 dev_dbg(dev, "ASoC: Registered platform '%s'\n", 2871 platform->component.name); 2872 2873 return 0; 2874 } 2875 EXPORT_SYMBOL_GPL(snd_soc_add_platform); 2876 2877 /** 2878 * snd_soc_register_platform - Register a platform with the ASoC core 2879 * 2880 * @platform: platform to register 2881 */ 2882 int snd_soc_register_platform(struct device *dev, 2883 const struct snd_soc_platform_driver *platform_drv) 2884 { 2885 struct snd_soc_platform *platform; 2886 int ret; 2887 2888 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev)); 2889 2890 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL); 2891 if (platform == NULL) 2892 return -ENOMEM; 2893 2894 ret = snd_soc_add_platform(dev, platform, platform_drv); 2895 if (ret) 2896 kfree(platform); 2897 2898 return ret; 2899 } 2900 EXPORT_SYMBOL_GPL(snd_soc_register_platform); 2901 2902 /** 2903 * snd_soc_remove_platform - Remove a platform from the ASoC core 2904 * @platform: the platform to remove 2905 */ 2906 void snd_soc_remove_platform(struct snd_soc_platform *platform) 2907 { 2908 2909 mutex_lock(&client_mutex); 2910 list_del(&platform->list); 2911 snd_soc_component_del_unlocked(&platform->component); 2912 mutex_unlock(&client_mutex); 2913 2914 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n", 2915 platform->component.name); 2916 2917 snd_soc_component_cleanup(&platform->component); 2918 } 2919 EXPORT_SYMBOL_GPL(snd_soc_remove_platform); 2920 2921 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev) 2922 { 2923 struct snd_soc_platform *platform; 2924 2925 mutex_lock(&client_mutex); 2926 list_for_each_entry(platform, &platform_list, list) { 2927 if (dev == platform->dev) { 2928 mutex_unlock(&client_mutex); 2929 return platform; 2930 } 2931 } 2932 mutex_unlock(&client_mutex); 2933 2934 return NULL; 2935 } 2936 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform); 2937 2938 /** 2939 * snd_soc_unregister_platform - Unregister a platform from the ASoC core 2940 * 2941 * @platform: platform to unregister 2942 */ 2943 void snd_soc_unregister_platform(struct device *dev) 2944 { 2945 struct snd_soc_platform *platform; 2946 2947 platform = snd_soc_lookup_platform(dev); 2948 if (!platform) 2949 return; 2950 2951 snd_soc_remove_platform(platform); 2952 kfree(platform); 2953 } 2954 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform); 2955 2956 static u64 codec_format_map[] = { 2957 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE, 2958 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE, 2959 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE, 2960 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE, 2961 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, 2962 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE, 2963 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2964 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2965 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE, 2966 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE, 2967 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE, 2968 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE, 2969 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE, 2970 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE, 2971 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 2972 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE, 2973 }; 2974 2975 /* Fix up the DAI formats for endianness: codecs don't actually see 2976 * the endianness of the data but we're using the CPU format 2977 * definitions which do need to include endianness so we ensure that 2978 * codec DAIs always have both big and little endian variants set. 2979 */ 2980 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream) 2981 { 2982 int i; 2983 2984 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++) 2985 if (stream->formats & codec_format_map[i]) 2986 stream->formats |= codec_format_map[i]; 2987 } 2988 2989 static int snd_soc_codec_drv_probe(struct snd_soc_component *component) 2990 { 2991 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2992 2993 return codec->driver->probe(codec); 2994 } 2995 2996 static void snd_soc_codec_drv_remove(struct snd_soc_component *component) 2997 { 2998 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2999 3000 codec->driver->remove(codec); 3001 } 3002 3003 static int snd_soc_codec_drv_write(struct snd_soc_component *component, 3004 unsigned int reg, unsigned int val) 3005 { 3006 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 3007 3008 return codec->driver->write(codec, reg, val); 3009 } 3010 3011 static int snd_soc_codec_drv_read(struct snd_soc_component *component, 3012 unsigned int reg, unsigned int *val) 3013 { 3014 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 3015 3016 *val = codec->driver->read(codec, reg); 3017 3018 return 0; 3019 } 3020 3021 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm, 3022 enum snd_soc_bias_level level) 3023 { 3024 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm); 3025 3026 return codec->driver->set_bias_level(codec, level); 3027 } 3028 3029 /** 3030 * snd_soc_register_codec - Register a codec with the ASoC core 3031 * 3032 * @codec: codec to register 3033 */ 3034 int snd_soc_register_codec(struct device *dev, 3035 const struct snd_soc_codec_driver *codec_drv, 3036 struct snd_soc_dai_driver *dai_drv, 3037 int num_dai) 3038 { 3039 struct snd_soc_codec *codec; 3040 struct snd_soc_dai *dai; 3041 int ret, i; 3042 3043 dev_dbg(dev, "codec register %s\n", dev_name(dev)); 3044 3045 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 3046 if (codec == NULL) 3047 return -ENOMEM; 3048 3049 codec->component.dapm_ptr = &codec->dapm; 3050 codec->component.codec = codec; 3051 3052 ret = snd_soc_component_initialize(&codec->component, 3053 &codec_drv->component_driver, dev); 3054 if (ret) 3055 goto err_free; 3056 3057 if (codec_drv->controls) { 3058 codec->component.controls = codec_drv->controls; 3059 codec->component.num_controls = codec_drv->num_controls; 3060 } 3061 if (codec_drv->dapm_widgets) { 3062 codec->component.dapm_widgets = codec_drv->dapm_widgets; 3063 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets; 3064 } 3065 if (codec_drv->dapm_routes) { 3066 codec->component.dapm_routes = codec_drv->dapm_routes; 3067 codec->component.num_dapm_routes = codec_drv->num_dapm_routes; 3068 } 3069 3070 if (codec_drv->probe) 3071 codec->component.probe = snd_soc_codec_drv_probe; 3072 if (codec_drv->remove) 3073 codec->component.remove = snd_soc_codec_drv_remove; 3074 if (codec_drv->write) 3075 codec->component.write = snd_soc_codec_drv_write; 3076 if (codec_drv->read) 3077 codec->component.read = snd_soc_codec_drv_read; 3078 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time; 3079 codec->dapm.idle_bias_off = codec_drv->idle_bias_off; 3080 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off; 3081 if (codec_drv->seq_notifier) 3082 codec->dapm.seq_notifier = codec_drv->seq_notifier; 3083 if (codec_drv->set_bias_level) 3084 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level; 3085 codec->dev = dev; 3086 codec->driver = codec_drv; 3087 codec->component.val_bytes = codec_drv->reg_word_size; 3088 3089 #ifdef CONFIG_DEBUG_FS 3090 codec->component.init_debugfs = soc_init_codec_debugfs; 3091 codec->component.debugfs_prefix = "codec"; 3092 #endif 3093 3094 if (codec_drv->get_regmap) 3095 codec->component.regmap = codec_drv->get_regmap(dev); 3096 3097 for (i = 0; i < num_dai; i++) { 3098 fixup_codec_formats(&dai_drv[i].playback); 3099 fixup_codec_formats(&dai_drv[i].capture); 3100 } 3101 3102 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false); 3103 if (ret < 0) { 3104 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret); 3105 goto err_cleanup; 3106 } 3107 3108 list_for_each_entry(dai, &codec->component.dai_list, list) 3109 dai->codec = codec; 3110 3111 mutex_lock(&client_mutex); 3112 snd_soc_component_add_unlocked(&codec->component); 3113 list_add(&codec->list, &codec_list); 3114 mutex_unlock(&client_mutex); 3115 3116 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", 3117 codec->component.name); 3118 return 0; 3119 3120 err_cleanup: 3121 snd_soc_component_cleanup(&codec->component); 3122 err_free: 3123 kfree(codec); 3124 return ret; 3125 } 3126 EXPORT_SYMBOL_GPL(snd_soc_register_codec); 3127 3128 /** 3129 * snd_soc_unregister_codec - Unregister a codec from the ASoC core 3130 * 3131 * @codec: codec to unregister 3132 */ 3133 void snd_soc_unregister_codec(struct device *dev) 3134 { 3135 struct snd_soc_codec *codec; 3136 3137 mutex_lock(&client_mutex); 3138 list_for_each_entry(codec, &codec_list, list) { 3139 if (dev == codec->dev) 3140 goto found; 3141 } 3142 mutex_unlock(&client_mutex); 3143 return; 3144 3145 found: 3146 list_del(&codec->list); 3147 snd_soc_component_del_unlocked(&codec->component); 3148 mutex_unlock(&client_mutex); 3149 3150 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", 3151 codec->component.name); 3152 3153 snd_soc_component_cleanup(&codec->component); 3154 snd_soc_cache_exit(codec); 3155 kfree(codec); 3156 } 3157 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); 3158 3159 /* Retrieve a card's name from device tree */ 3160 int snd_soc_of_parse_card_name(struct snd_soc_card *card, 3161 const char *propname) 3162 { 3163 struct device_node *np; 3164 int ret; 3165 3166 if (!card->dev) { 3167 pr_err("card->dev is not set before calling %s\n", __func__); 3168 return -EINVAL; 3169 } 3170 3171 np = card->dev->of_node; 3172 3173 ret = of_property_read_string_index(np, propname, 0, &card->name); 3174 /* 3175 * EINVAL means the property does not exist. This is fine providing 3176 * card->name was previously set, which is checked later in 3177 * snd_soc_register_card. 3178 */ 3179 if (ret < 0 && ret != -EINVAL) { 3180 dev_err(card->dev, 3181 "ASoC: Property '%s' could not be read: %d\n", 3182 propname, ret); 3183 return ret; 3184 } 3185 3186 return 0; 3187 } 3188 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name); 3189 3190 static const struct snd_soc_dapm_widget simple_widgets[] = { 3191 SND_SOC_DAPM_MIC("Microphone", NULL), 3192 SND_SOC_DAPM_LINE("Line", NULL), 3193 SND_SOC_DAPM_HP("Headphone", NULL), 3194 SND_SOC_DAPM_SPK("Speaker", NULL), 3195 }; 3196 3197 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card, 3198 const char *propname) 3199 { 3200 struct device_node *np = card->dev->of_node; 3201 struct snd_soc_dapm_widget *widgets; 3202 const char *template, *wname; 3203 int i, j, num_widgets, ret; 3204 3205 num_widgets = of_property_count_strings(np, propname); 3206 if (num_widgets < 0) { 3207 dev_err(card->dev, 3208 "ASoC: Property '%s' does not exist\n", propname); 3209 return -EINVAL; 3210 } 3211 if (num_widgets & 1) { 3212 dev_err(card->dev, 3213 "ASoC: Property '%s' length is not even\n", propname); 3214 return -EINVAL; 3215 } 3216 3217 num_widgets /= 2; 3218 if (!num_widgets) { 3219 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3220 propname); 3221 return -EINVAL; 3222 } 3223 3224 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets), 3225 GFP_KERNEL); 3226 if (!widgets) { 3227 dev_err(card->dev, 3228 "ASoC: Could not allocate memory for widgets\n"); 3229 return -ENOMEM; 3230 } 3231 3232 for (i = 0; i < num_widgets; i++) { 3233 ret = of_property_read_string_index(np, propname, 3234 2 * i, &template); 3235 if (ret) { 3236 dev_err(card->dev, 3237 "ASoC: Property '%s' index %d read error:%d\n", 3238 propname, 2 * i, ret); 3239 return -EINVAL; 3240 } 3241 3242 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) { 3243 if (!strncmp(template, simple_widgets[j].name, 3244 strlen(simple_widgets[j].name))) { 3245 widgets[i] = simple_widgets[j]; 3246 break; 3247 } 3248 } 3249 3250 if (j >= ARRAY_SIZE(simple_widgets)) { 3251 dev_err(card->dev, 3252 "ASoC: DAPM widget '%s' is not supported\n", 3253 template); 3254 return -EINVAL; 3255 } 3256 3257 ret = of_property_read_string_index(np, propname, 3258 (2 * i) + 1, 3259 &wname); 3260 if (ret) { 3261 dev_err(card->dev, 3262 "ASoC: Property '%s' index %d read error:%d\n", 3263 propname, (2 * i) + 1, ret); 3264 return -EINVAL; 3265 } 3266 3267 widgets[i].name = wname; 3268 } 3269 3270 card->of_dapm_widgets = widgets; 3271 card->num_of_dapm_widgets = num_widgets; 3272 3273 return 0; 3274 } 3275 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets); 3276 3277 int snd_soc_of_parse_tdm_slot(struct device_node *np, 3278 unsigned int *slots, 3279 unsigned int *slot_width) 3280 { 3281 u32 val; 3282 int ret; 3283 3284 if (of_property_read_bool(np, "dai-tdm-slot-num")) { 3285 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val); 3286 if (ret) 3287 return ret; 3288 3289 if (slots) 3290 *slots = val; 3291 } 3292 3293 if (of_property_read_bool(np, "dai-tdm-slot-width")) { 3294 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val); 3295 if (ret) 3296 return ret; 3297 3298 if (slot_width) 3299 *slot_width = val; 3300 } 3301 3302 return 0; 3303 } 3304 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot); 3305 3306 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card, 3307 const char *propname) 3308 { 3309 struct device_node *np = card->dev->of_node; 3310 int num_routes; 3311 struct snd_soc_dapm_route *routes; 3312 int i, ret; 3313 3314 num_routes = of_property_count_strings(np, propname); 3315 if (num_routes < 0 || num_routes & 1) { 3316 dev_err(card->dev, 3317 "ASoC: Property '%s' does not exist or its length is not even\n", 3318 propname); 3319 return -EINVAL; 3320 } 3321 num_routes /= 2; 3322 if (!num_routes) { 3323 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3324 propname); 3325 return -EINVAL; 3326 } 3327 3328 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes), 3329 GFP_KERNEL); 3330 if (!routes) { 3331 dev_err(card->dev, 3332 "ASoC: Could not allocate DAPM route table\n"); 3333 return -EINVAL; 3334 } 3335 3336 for (i = 0; i < num_routes; i++) { 3337 ret = of_property_read_string_index(np, propname, 3338 2 * i, &routes[i].sink); 3339 if (ret) { 3340 dev_err(card->dev, 3341 "ASoC: Property '%s' index %d could not be read: %d\n", 3342 propname, 2 * i, ret); 3343 return -EINVAL; 3344 } 3345 ret = of_property_read_string_index(np, propname, 3346 (2 * i) + 1, &routes[i].source); 3347 if (ret) { 3348 dev_err(card->dev, 3349 "ASoC: Property '%s' index %d could not be read: %d\n", 3350 propname, (2 * i) + 1, ret); 3351 return -EINVAL; 3352 } 3353 } 3354 3355 card->num_of_dapm_routes = num_routes; 3356 card->of_dapm_routes = routes; 3357 3358 return 0; 3359 } 3360 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing); 3361 3362 unsigned int snd_soc_of_parse_daifmt(struct device_node *np, 3363 const char *prefix, 3364 struct device_node **bitclkmaster, 3365 struct device_node **framemaster) 3366 { 3367 int ret, i; 3368 char prop[128]; 3369 unsigned int format = 0; 3370 int bit, frame; 3371 const char *str; 3372 struct { 3373 char *name; 3374 unsigned int val; 3375 } of_fmt_table[] = { 3376 { "i2s", SND_SOC_DAIFMT_I2S }, 3377 { "right_j", SND_SOC_DAIFMT_RIGHT_J }, 3378 { "left_j", SND_SOC_DAIFMT_LEFT_J }, 3379 { "dsp_a", SND_SOC_DAIFMT_DSP_A }, 3380 { "dsp_b", SND_SOC_DAIFMT_DSP_B }, 3381 { "ac97", SND_SOC_DAIFMT_AC97 }, 3382 { "pdm", SND_SOC_DAIFMT_PDM}, 3383 { "msb", SND_SOC_DAIFMT_MSB }, 3384 { "lsb", SND_SOC_DAIFMT_LSB }, 3385 }; 3386 3387 if (!prefix) 3388 prefix = ""; 3389 3390 /* 3391 * check "[prefix]format = xxx" 3392 * SND_SOC_DAIFMT_FORMAT_MASK area 3393 */ 3394 snprintf(prop, sizeof(prop), "%sformat", prefix); 3395 ret = of_property_read_string(np, prop, &str); 3396 if (ret == 0) { 3397 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) { 3398 if (strcmp(str, of_fmt_table[i].name) == 0) { 3399 format |= of_fmt_table[i].val; 3400 break; 3401 } 3402 } 3403 } 3404 3405 /* 3406 * check "[prefix]continuous-clock" 3407 * SND_SOC_DAIFMT_CLOCK_MASK area 3408 */ 3409 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix); 3410 if (of_get_property(np, prop, NULL)) 3411 format |= SND_SOC_DAIFMT_CONT; 3412 else 3413 format |= SND_SOC_DAIFMT_GATED; 3414 3415 /* 3416 * check "[prefix]bitclock-inversion" 3417 * check "[prefix]frame-inversion" 3418 * SND_SOC_DAIFMT_INV_MASK area 3419 */ 3420 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix); 3421 bit = !!of_get_property(np, prop, NULL); 3422 3423 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix); 3424 frame = !!of_get_property(np, prop, NULL); 3425 3426 switch ((bit << 4) + frame) { 3427 case 0x11: 3428 format |= SND_SOC_DAIFMT_IB_IF; 3429 break; 3430 case 0x10: 3431 format |= SND_SOC_DAIFMT_IB_NF; 3432 break; 3433 case 0x01: 3434 format |= SND_SOC_DAIFMT_NB_IF; 3435 break; 3436 default: 3437 /* SND_SOC_DAIFMT_NB_NF is default */ 3438 break; 3439 } 3440 3441 /* 3442 * check "[prefix]bitclock-master" 3443 * check "[prefix]frame-master" 3444 * SND_SOC_DAIFMT_MASTER_MASK area 3445 */ 3446 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix); 3447 bit = !!of_get_property(np, prop, NULL); 3448 if (bit && bitclkmaster) 3449 *bitclkmaster = of_parse_phandle(np, prop, 0); 3450 3451 snprintf(prop, sizeof(prop), "%sframe-master", prefix); 3452 frame = !!of_get_property(np, prop, NULL); 3453 if (frame && framemaster) 3454 *framemaster = of_parse_phandle(np, prop, 0); 3455 3456 switch ((bit << 4) + frame) { 3457 case 0x11: 3458 format |= SND_SOC_DAIFMT_CBM_CFM; 3459 break; 3460 case 0x10: 3461 format |= SND_SOC_DAIFMT_CBM_CFS; 3462 break; 3463 case 0x01: 3464 format |= SND_SOC_DAIFMT_CBS_CFM; 3465 break; 3466 default: 3467 format |= SND_SOC_DAIFMT_CBS_CFS; 3468 break; 3469 } 3470 3471 return format; 3472 } 3473 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt); 3474 3475 static int snd_soc_get_dai_name(struct of_phandle_args *args, 3476 const char **dai_name) 3477 { 3478 struct snd_soc_component *pos; 3479 struct device_node *component_of_node; 3480 int ret = -EPROBE_DEFER; 3481 3482 mutex_lock(&client_mutex); 3483 list_for_each_entry(pos, &component_list, list) { 3484 component_of_node = pos->dev->of_node; 3485 if (!component_of_node && pos->dev->parent) 3486 component_of_node = pos->dev->parent->of_node; 3487 3488 if (component_of_node != args->np) 3489 continue; 3490 3491 if (pos->driver->of_xlate_dai_name) { 3492 ret = pos->driver->of_xlate_dai_name(pos, 3493 args, 3494 dai_name); 3495 } else { 3496 int id = -1; 3497 3498 switch (args->args_count) { 3499 case 0: 3500 id = 0; /* same as dai_drv[0] */ 3501 break; 3502 case 1: 3503 id = args->args[0]; 3504 break; 3505 default: 3506 /* not supported */ 3507 break; 3508 } 3509 3510 if (id < 0 || id >= pos->num_dai) { 3511 ret = -EINVAL; 3512 continue; 3513 } 3514 3515 ret = 0; 3516 3517 *dai_name = pos->dai_drv[id].name; 3518 if (!*dai_name) 3519 *dai_name = pos->name; 3520 } 3521 3522 break; 3523 } 3524 mutex_unlock(&client_mutex); 3525 return ret; 3526 } 3527 3528 int snd_soc_of_get_dai_name(struct device_node *of_node, 3529 const char **dai_name) 3530 { 3531 struct of_phandle_args args; 3532 int ret; 3533 3534 ret = of_parse_phandle_with_args(of_node, "sound-dai", 3535 "#sound-dai-cells", 0, &args); 3536 if (ret) 3537 return ret; 3538 3539 ret = snd_soc_get_dai_name(&args, dai_name); 3540 3541 of_node_put(args.np); 3542 3543 return ret; 3544 } 3545 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name); 3546 3547 /* 3548 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree 3549 * @dev: Card device 3550 * @of_node: Device node 3551 * @dai_link: DAI link 3552 * 3553 * Builds an array of CODEC DAI components from the DAI link property 3554 * 'sound-dai'. 3555 * The array is set in the DAI link and the number of DAIs is set accordingly. 3556 * The device nodes in the array (of_node) must be dereferenced by the caller. 3557 * 3558 * Returns 0 for success 3559 */ 3560 int snd_soc_of_get_dai_link_codecs(struct device *dev, 3561 struct device_node *of_node, 3562 struct snd_soc_dai_link *dai_link) 3563 { 3564 struct of_phandle_args args; 3565 struct snd_soc_dai_link_component *component; 3566 char *name; 3567 int index, num_codecs, ret; 3568 3569 /* Count the number of CODECs */ 3570 name = "sound-dai"; 3571 num_codecs = of_count_phandle_with_args(of_node, name, 3572 "#sound-dai-cells"); 3573 if (num_codecs <= 0) { 3574 if (num_codecs == -ENOENT) 3575 dev_err(dev, "No 'sound-dai' property\n"); 3576 else 3577 dev_err(dev, "Bad phandle in 'sound-dai'\n"); 3578 return num_codecs; 3579 } 3580 component = devm_kzalloc(dev, 3581 sizeof *component * num_codecs, 3582 GFP_KERNEL); 3583 if (!component) 3584 return -ENOMEM; 3585 dai_link->codecs = component; 3586 dai_link->num_codecs = num_codecs; 3587 3588 /* Parse the list */ 3589 for (index = 0, component = dai_link->codecs; 3590 index < dai_link->num_codecs; 3591 index++, component++) { 3592 ret = of_parse_phandle_with_args(of_node, name, 3593 "#sound-dai-cells", 3594 index, &args); 3595 if (ret) 3596 goto err; 3597 component->of_node = args.np; 3598 ret = snd_soc_get_dai_name(&args, &component->dai_name); 3599 if (ret < 0) 3600 goto err; 3601 } 3602 return 0; 3603 err: 3604 for (index = 0, component = dai_link->codecs; 3605 index < dai_link->num_codecs; 3606 index++, component++) { 3607 if (!component->of_node) 3608 break; 3609 of_node_put(component->of_node); 3610 component->of_node = NULL; 3611 } 3612 dai_link->codecs = NULL; 3613 dai_link->num_codecs = 0; 3614 return ret; 3615 } 3616 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs); 3617 3618 static int __init snd_soc_init(void) 3619 { 3620 snd_soc_debugfs_init(); 3621 snd_soc_util_init(); 3622 3623 return platform_driver_register(&soc_driver); 3624 } 3625 module_init(snd_soc_init); 3626 3627 static void __exit snd_soc_exit(void) 3628 { 3629 snd_soc_util_exit(); 3630 snd_soc_debugfs_exit(); 3631 3632 #ifdef CONFIG_DEBUG_FS 3633 #endif 3634 platform_driver_unregister(&soc_driver); 3635 } 3636 module_exit(snd_soc_exit); 3637 3638 /* Module information */ 3639 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); 3640 MODULE_DESCRIPTION("ALSA SoC Core"); 3641 MODULE_LICENSE("GPL"); 3642 MODULE_ALIAS("platform:soc-audio"); 3643