1 /* 2 * soc-core.c -- ALSA SoC Audio Layer 3 * 4 * Copyright 2005 Wolfson Microelectronics PLC. 5 * Copyright 2005 Openedhand Ltd. 6 * Copyright (C) 2010 Slimlogic Ltd. 7 * Copyright (C) 2010 Texas Instruments Inc. 8 * 9 * Author: Liam Girdwood <lrg@slimlogic.co.uk> 10 * with code, comments and ideas from :- 11 * Richard Purdie <richard@openedhand.com> 12 * 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License as published by the 15 * Free Software Foundation; either version 2 of the License, or (at your 16 * option) any later version. 17 * 18 * TODO: 19 * o Add hw rules to enforce rates, etc. 20 * o More testing with other codecs/machines. 21 * o Add more codecs and platforms to ensure good API coverage. 22 * o Support TDM on PCM and I2S 23 */ 24 25 #include <linux/module.h> 26 #include <linux/moduleparam.h> 27 #include <linux/init.h> 28 #include <linux/delay.h> 29 #include <linux/pm.h> 30 #include <linux/bitops.h> 31 #include <linux/debugfs.h> 32 #include <linux/platform_device.h> 33 #include <linux/pinctrl/consumer.h> 34 #include <linux/ctype.h> 35 #include <linux/slab.h> 36 #include <linux/of.h> 37 #include <sound/core.h> 38 #include <sound/jack.h> 39 #include <sound/pcm.h> 40 #include <sound/pcm_params.h> 41 #include <sound/soc.h> 42 #include <sound/soc-dpcm.h> 43 #include <sound/initval.h> 44 45 #define CREATE_TRACE_POINTS 46 #include <trace/events/asoc.h> 47 48 #define NAME_SIZE 32 49 50 #ifdef CONFIG_DEBUG_FS 51 struct dentry *snd_soc_debugfs_root; 52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root); 53 #endif 54 55 static DEFINE_MUTEX(client_mutex); 56 static LIST_HEAD(platform_list); 57 static LIST_HEAD(codec_list); 58 static LIST_HEAD(component_list); 59 60 /* 61 * This is a timeout to do a DAPM powerdown after a stream is closed(). 62 * It can be used to eliminate pops between different playback streams, e.g. 63 * between two audio tracks. 64 */ 65 static int pmdown_time = 5000; 66 module_param(pmdown_time, int, 0); 67 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)"); 68 69 /* returns the minimum number of bytes needed to represent 70 * a particular given value */ 71 static int min_bytes_needed(unsigned long val) 72 { 73 int c = 0; 74 int i; 75 76 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c) 77 if (val & (1UL << i)) 78 break; 79 c = (sizeof val * 8) - c; 80 if (!c || (c % 8)) 81 c = (c + 8) / 8; 82 else 83 c /= 8; 84 return c; 85 } 86 87 /* fill buf which is 'len' bytes with a formatted 88 * string of the form 'reg: value\n' */ 89 static int format_register_str(struct snd_soc_codec *codec, 90 unsigned int reg, char *buf, size_t len) 91 { 92 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; 93 int regsize = codec->driver->reg_word_size * 2; 94 int ret; 95 char tmpbuf[len + 1]; 96 char regbuf[regsize + 1]; 97 98 /* since tmpbuf is allocated on the stack, warn the callers if they 99 * try to abuse this function */ 100 WARN_ON(len > 63); 101 102 /* +2 for ': ' and + 1 for '\n' */ 103 if (wordsize + regsize + 2 + 1 != len) 104 return -EINVAL; 105 106 ret = snd_soc_read(codec, reg); 107 if (ret < 0) { 108 memset(regbuf, 'X', regsize); 109 regbuf[regsize] = '\0'; 110 } else { 111 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret); 112 } 113 114 /* prepare the buffer */ 115 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf); 116 /* copy it back to the caller without the '\0' */ 117 memcpy(buf, tmpbuf, len); 118 119 return 0; 120 } 121 122 /* codec register dump */ 123 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf, 124 size_t count, loff_t pos) 125 { 126 int i, step = 1; 127 int wordsize, regsize; 128 int len; 129 size_t total = 0; 130 loff_t p = 0; 131 132 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2; 133 regsize = codec->driver->reg_word_size * 2; 134 135 len = wordsize + regsize + 2 + 1; 136 137 if (!codec->driver->reg_cache_size) 138 return 0; 139 140 if (codec->driver->reg_cache_step) 141 step = codec->driver->reg_cache_step; 142 143 for (i = 0; i < codec->driver->reg_cache_size; i += step) { 144 /* only support larger than PAGE_SIZE bytes debugfs 145 * entries for the default case */ 146 if (p >= pos) { 147 if (total + len >= count - 1) 148 break; 149 format_register_str(codec, i, buf + total, len); 150 total += len; 151 } 152 p += len; 153 } 154 155 total = min(total, count - 1); 156 157 return total; 158 } 159 160 static ssize_t codec_reg_show(struct device *dev, 161 struct device_attribute *attr, char *buf) 162 { 163 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 164 165 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0); 166 } 167 168 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL); 169 170 static ssize_t pmdown_time_show(struct device *dev, 171 struct device_attribute *attr, char *buf) 172 { 173 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 174 175 return sprintf(buf, "%ld\n", rtd->pmdown_time); 176 } 177 178 static ssize_t pmdown_time_set(struct device *dev, 179 struct device_attribute *attr, 180 const char *buf, size_t count) 181 { 182 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 183 int ret; 184 185 ret = kstrtol(buf, 10, &rtd->pmdown_time); 186 if (ret) 187 return ret; 188 189 return count; 190 } 191 192 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set); 193 194 static struct attribute *soc_dev_attrs[] = { 195 &dev_attr_codec_reg.attr, 196 &dev_attr_pmdown_time.attr, 197 NULL 198 }; 199 200 static umode_t soc_dev_attr_is_visible(struct kobject *kobj, 201 struct attribute *attr, int idx) 202 { 203 struct device *dev = kobj_to_dev(kobj); 204 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 205 206 if (attr == &dev_attr_pmdown_time.attr) 207 return attr->mode; /* always visible */ 208 return rtd->codec ? attr->mode : 0; /* enabled only with codec */ 209 } 210 211 static const struct attribute_group soc_dapm_dev_group = { 212 .attrs = soc_dapm_dev_attrs, 213 .is_visible = soc_dev_attr_is_visible, 214 }; 215 216 static const struct attribute_group soc_dev_roup = { 217 .attrs = soc_dev_attrs, 218 .is_visible = soc_dev_attr_is_visible, 219 }; 220 221 static const struct attribute_group *soc_dev_attr_groups[] = { 222 &soc_dapm_dev_group, 223 &soc_dev_roup, 224 NULL 225 }; 226 227 #ifdef CONFIG_DEBUG_FS 228 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf, 229 size_t count, loff_t *ppos) 230 { 231 ssize_t ret; 232 struct snd_soc_codec *codec = file->private_data; 233 char *buf; 234 235 if (*ppos < 0 || !count) 236 return -EINVAL; 237 238 buf = kmalloc(count, GFP_KERNEL); 239 if (!buf) 240 return -ENOMEM; 241 242 ret = soc_codec_reg_show(codec, buf, count, *ppos); 243 if (ret >= 0) { 244 if (copy_to_user(user_buf, buf, ret)) { 245 kfree(buf); 246 return -EFAULT; 247 } 248 *ppos += ret; 249 } 250 251 kfree(buf); 252 return ret; 253 } 254 255 static ssize_t codec_reg_write_file(struct file *file, 256 const char __user *user_buf, size_t count, loff_t *ppos) 257 { 258 char buf[32]; 259 size_t buf_size; 260 char *start = buf; 261 unsigned long reg, value; 262 struct snd_soc_codec *codec = file->private_data; 263 int ret; 264 265 buf_size = min(count, (sizeof(buf)-1)); 266 if (copy_from_user(buf, user_buf, buf_size)) 267 return -EFAULT; 268 buf[buf_size] = 0; 269 270 while (*start == ' ') 271 start++; 272 reg = simple_strtoul(start, &start, 16); 273 while (*start == ' ') 274 start++; 275 ret = kstrtoul(start, 16, &value); 276 if (ret) 277 return ret; 278 279 /* Userspace has been fiddling around behind the kernel's back */ 280 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE); 281 282 snd_soc_write(codec, reg, value); 283 return buf_size; 284 } 285 286 static const struct file_operations codec_reg_fops = { 287 .open = simple_open, 288 .read = codec_reg_read_file, 289 .write = codec_reg_write_file, 290 .llseek = default_llseek, 291 }; 292 293 static void soc_init_component_debugfs(struct snd_soc_component *component) 294 { 295 if (component->debugfs_prefix) { 296 char *name; 297 298 name = kasprintf(GFP_KERNEL, "%s:%s", 299 component->debugfs_prefix, component->name); 300 if (name) { 301 component->debugfs_root = debugfs_create_dir(name, 302 component->card->debugfs_card_root); 303 kfree(name); 304 } 305 } else { 306 component->debugfs_root = debugfs_create_dir(component->name, 307 component->card->debugfs_card_root); 308 } 309 310 if (!component->debugfs_root) { 311 dev_warn(component->dev, 312 "ASoC: Failed to create component debugfs directory\n"); 313 return; 314 } 315 316 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component), 317 component->debugfs_root); 318 319 if (component->init_debugfs) 320 component->init_debugfs(component); 321 } 322 323 static void soc_cleanup_component_debugfs(struct snd_soc_component *component) 324 { 325 debugfs_remove_recursive(component->debugfs_root); 326 } 327 328 static void soc_init_codec_debugfs(struct snd_soc_component *component) 329 { 330 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 331 332 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, 333 codec->component.debugfs_root, 334 codec, &codec_reg_fops); 335 if (!codec->debugfs_reg) 336 dev_warn(codec->dev, 337 "ASoC: Failed to create codec register debugfs file\n"); 338 } 339 340 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf, 341 size_t count, loff_t *ppos) 342 { 343 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 344 ssize_t len, ret = 0; 345 struct snd_soc_codec *codec; 346 347 if (!buf) 348 return -ENOMEM; 349 350 mutex_lock(&client_mutex); 351 352 list_for_each_entry(codec, &codec_list, list) { 353 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 354 codec->component.name); 355 if (len >= 0) 356 ret += len; 357 if (ret > PAGE_SIZE) { 358 ret = PAGE_SIZE; 359 break; 360 } 361 } 362 363 mutex_unlock(&client_mutex); 364 365 if (ret >= 0) 366 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 367 368 kfree(buf); 369 370 return ret; 371 } 372 373 static const struct file_operations codec_list_fops = { 374 .read = codec_list_read_file, 375 .llseek = default_llseek,/* read accesses f_pos */ 376 }; 377 378 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf, 379 size_t count, loff_t *ppos) 380 { 381 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 382 ssize_t len, ret = 0; 383 struct snd_soc_component *component; 384 struct snd_soc_dai *dai; 385 386 if (!buf) 387 return -ENOMEM; 388 389 mutex_lock(&client_mutex); 390 391 list_for_each_entry(component, &component_list, list) { 392 list_for_each_entry(dai, &component->dai_list, list) { 393 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 394 dai->name); 395 if (len >= 0) 396 ret += len; 397 if (ret > PAGE_SIZE) { 398 ret = PAGE_SIZE; 399 break; 400 } 401 } 402 } 403 404 mutex_unlock(&client_mutex); 405 406 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 407 408 kfree(buf); 409 410 return ret; 411 } 412 413 static const struct file_operations dai_list_fops = { 414 .read = dai_list_read_file, 415 .llseek = default_llseek,/* read accesses f_pos */ 416 }; 417 418 static ssize_t platform_list_read_file(struct file *file, 419 char __user *user_buf, 420 size_t count, loff_t *ppos) 421 { 422 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 423 ssize_t len, ret = 0; 424 struct snd_soc_platform *platform; 425 426 if (!buf) 427 return -ENOMEM; 428 429 mutex_lock(&client_mutex); 430 431 list_for_each_entry(platform, &platform_list, list) { 432 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", 433 platform->component.name); 434 if (len >= 0) 435 ret += len; 436 if (ret > PAGE_SIZE) { 437 ret = PAGE_SIZE; 438 break; 439 } 440 } 441 442 mutex_unlock(&client_mutex); 443 444 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 445 446 kfree(buf); 447 448 return ret; 449 } 450 451 static const struct file_operations platform_list_fops = { 452 .read = platform_list_read_file, 453 .llseek = default_llseek,/* read accesses f_pos */ 454 }; 455 456 static void soc_init_card_debugfs(struct snd_soc_card *card) 457 { 458 card->debugfs_card_root = debugfs_create_dir(card->name, 459 snd_soc_debugfs_root); 460 if (!card->debugfs_card_root) { 461 dev_warn(card->dev, 462 "ASoC: Failed to create card debugfs directory\n"); 463 return; 464 } 465 466 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644, 467 card->debugfs_card_root, 468 &card->pop_time); 469 if (!card->debugfs_pop_time) 470 dev_warn(card->dev, 471 "ASoC: Failed to create pop time debugfs file\n"); 472 } 473 474 static void soc_cleanup_card_debugfs(struct snd_soc_card *card) 475 { 476 debugfs_remove_recursive(card->debugfs_card_root); 477 } 478 479 #else 480 481 #define soc_init_codec_debugfs NULL 482 483 static inline void soc_init_component_debugfs( 484 struct snd_soc_component *component) 485 { 486 } 487 488 static inline void soc_cleanup_component_debugfs( 489 struct snd_soc_component *component) 490 { 491 } 492 493 static inline void soc_init_card_debugfs(struct snd_soc_card *card) 494 { 495 } 496 497 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) 498 { 499 } 500 #endif 501 502 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card, 503 const char *dai_link, int stream) 504 { 505 int i; 506 507 for (i = 0; i < card->num_links; i++) { 508 if (card->rtd[i].dai_link->no_pcm && 509 !strcmp(card->rtd[i].dai_link->name, dai_link)) 510 return card->rtd[i].pcm->streams[stream].substream; 511 } 512 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link); 513 return NULL; 514 } 515 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream); 516 517 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card, 518 const char *dai_link) 519 { 520 int i; 521 522 for (i = 0; i < card->num_links; i++) { 523 if (!strcmp(card->rtd[i].dai_link->name, dai_link)) 524 return &card->rtd[i]; 525 } 526 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link); 527 return NULL; 528 } 529 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime); 530 531 static void codec2codec_close_delayed_work(struct work_struct *work) 532 { 533 /* Currently nothing to do for c2c links 534 * Since c2c links are internal nodes in the DAPM graph and 535 * don't interface with the outside world or application layer 536 * we don't have to do any special handling on close. 537 */ 538 } 539 540 #ifdef CONFIG_PM_SLEEP 541 /* powers down audio subsystem for suspend */ 542 int snd_soc_suspend(struct device *dev) 543 { 544 struct snd_soc_card *card = dev_get_drvdata(dev); 545 struct snd_soc_codec *codec; 546 int i, j; 547 548 /* If the card is not initialized yet there is nothing to do */ 549 if (!card->instantiated) 550 return 0; 551 552 /* Due to the resume being scheduled into a workqueue we could 553 * suspend before that's finished - wait for it to complete. 554 */ 555 snd_power_lock(card->snd_card); 556 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0); 557 snd_power_unlock(card->snd_card); 558 559 /* we're going to block userspace touching us until resume completes */ 560 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot); 561 562 /* mute any active DACs */ 563 for (i = 0; i < card->num_rtd; i++) { 564 565 if (card->rtd[i].dai_link->ignore_suspend) 566 continue; 567 568 for (j = 0; j < card->rtd[i].num_codecs; j++) { 569 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 570 struct snd_soc_dai_driver *drv = dai->driver; 571 572 if (drv->ops->digital_mute && dai->playback_active) 573 drv->ops->digital_mute(dai, 1); 574 } 575 } 576 577 /* suspend all pcms */ 578 for (i = 0; i < card->num_rtd; i++) { 579 if (card->rtd[i].dai_link->ignore_suspend) 580 continue; 581 582 snd_pcm_suspend_all(card->rtd[i].pcm); 583 } 584 585 if (card->suspend_pre) 586 card->suspend_pre(card); 587 588 for (i = 0; i < card->num_rtd; i++) { 589 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 590 591 if (card->rtd[i].dai_link->ignore_suspend) 592 continue; 593 594 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control) 595 cpu_dai->driver->suspend(cpu_dai); 596 } 597 598 /* close any waiting streams and save state */ 599 for (i = 0; i < card->num_rtd; i++) { 600 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais; 601 flush_delayed_work(&card->rtd[i].delayed_work); 602 for (j = 0; j < card->rtd[i].num_codecs; j++) { 603 codec_dais[j]->codec->dapm.suspend_bias_level = 604 codec_dais[j]->codec->dapm.bias_level; 605 } 606 } 607 608 for (i = 0; i < card->num_rtd; i++) { 609 610 if (card->rtd[i].dai_link->ignore_suspend) 611 continue; 612 613 snd_soc_dapm_stream_event(&card->rtd[i], 614 SNDRV_PCM_STREAM_PLAYBACK, 615 SND_SOC_DAPM_STREAM_SUSPEND); 616 617 snd_soc_dapm_stream_event(&card->rtd[i], 618 SNDRV_PCM_STREAM_CAPTURE, 619 SND_SOC_DAPM_STREAM_SUSPEND); 620 } 621 622 /* Recheck all endpoints too, their state is affected by suspend */ 623 dapm_mark_endpoints_dirty(card); 624 snd_soc_dapm_sync(&card->dapm); 625 626 /* suspend all CODECs */ 627 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 628 /* If there are paths active then the CODEC will be held with 629 * bias _ON and should not be suspended. */ 630 if (!codec->suspended) { 631 switch (codec->dapm.bias_level) { 632 case SND_SOC_BIAS_STANDBY: 633 /* 634 * If the CODEC is capable of idle 635 * bias off then being in STANDBY 636 * means it's doing something, 637 * otherwise fall through. 638 */ 639 if (codec->dapm.idle_bias_off) { 640 dev_dbg(codec->dev, 641 "ASoC: idle_bias_off CODEC on over suspend\n"); 642 break; 643 } 644 645 case SND_SOC_BIAS_OFF: 646 if (codec->driver->suspend) 647 codec->driver->suspend(codec); 648 codec->suspended = 1; 649 if (codec->component.regmap) 650 regcache_mark_dirty(codec->component.regmap); 651 /* deactivate pins to sleep state */ 652 pinctrl_pm_select_sleep_state(codec->dev); 653 break; 654 default: 655 dev_dbg(codec->dev, 656 "ASoC: CODEC is on over suspend\n"); 657 break; 658 } 659 } 660 } 661 662 for (i = 0; i < card->num_rtd; i++) { 663 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 664 665 if (card->rtd[i].dai_link->ignore_suspend) 666 continue; 667 668 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control) 669 cpu_dai->driver->suspend(cpu_dai); 670 671 /* deactivate pins to sleep state */ 672 pinctrl_pm_select_sleep_state(cpu_dai->dev); 673 } 674 675 if (card->suspend_post) 676 card->suspend_post(card); 677 678 return 0; 679 } 680 EXPORT_SYMBOL_GPL(snd_soc_suspend); 681 682 /* deferred resume work, so resume can complete before we finished 683 * setting our codec back up, which can be very slow on I2C 684 */ 685 static void soc_resume_deferred(struct work_struct *work) 686 { 687 struct snd_soc_card *card = 688 container_of(work, struct snd_soc_card, deferred_resume_work); 689 struct snd_soc_codec *codec; 690 int i, j; 691 692 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time, 693 * so userspace apps are blocked from touching us 694 */ 695 696 dev_dbg(card->dev, "ASoC: starting resume work\n"); 697 698 /* Bring us up into D2 so that DAPM starts enabling things */ 699 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2); 700 701 if (card->resume_pre) 702 card->resume_pre(card); 703 704 /* resume control bus DAIs */ 705 for (i = 0; i < card->num_rtd; i++) { 706 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 707 708 if (card->rtd[i].dai_link->ignore_suspend) 709 continue; 710 711 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control) 712 cpu_dai->driver->resume(cpu_dai); 713 } 714 715 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 716 /* If the CODEC was idle over suspend then it will have been 717 * left with bias OFF or STANDBY and suspended so we must now 718 * resume. Otherwise the suspend was suppressed. 719 */ 720 if (codec->suspended) { 721 switch (codec->dapm.bias_level) { 722 case SND_SOC_BIAS_STANDBY: 723 case SND_SOC_BIAS_OFF: 724 if (codec->driver->resume) 725 codec->driver->resume(codec); 726 codec->suspended = 0; 727 break; 728 default: 729 dev_dbg(codec->dev, 730 "ASoC: CODEC was on over suspend\n"); 731 break; 732 } 733 } 734 } 735 736 for (i = 0; i < card->num_rtd; i++) { 737 738 if (card->rtd[i].dai_link->ignore_suspend) 739 continue; 740 741 snd_soc_dapm_stream_event(&card->rtd[i], 742 SNDRV_PCM_STREAM_PLAYBACK, 743 SND_SOC_DAPM_STREAM_RESUME); 744 745 snd_soc_dapm_stream_event(&card->rtd[i], 746 SNDRV_PCM_STREAM_CAPTURE, 747 SND_SOC_DAPM_STREAM_RESUME); 748 } 749 750 /* unmute any active DACs */ 751 for (i = 0; i < card->num_rtd; i++) { 752 753 if (card->rtd[i].dai_link->ignore_suspend) 754 continue; 755 756 for (j = 0; j < card->rtd[i].num_codecs; j++) { 757 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j]; 758 struct snd_soc_dai_driver *drv = dai->driver; 759 760 if (drv->ops->digital_mute && dai->playback_active) 761 drv->ops->digital_mute(dai, 0); 762 } 763 } 764 765 for (i = 0; i < card->num_rtd; i++) { 766 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 767 768 if (card->rtd[i].dai_link->ignore_suspend) 769 continue; 770 771 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control) 772 cpu_dai->driver->resume(cpu_dai); 773 } 774 775 if (card->resume_post) 776 card->resume_post(card); 777 778 dev_dbg(card->dev, "ASoC: resume work completed\n"); 779 780 /* userspace can access us now we are back as we were before */ 781 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0); 782 783 /* Recheck all endpoints too, their state is affected by suspend */ 784 dapm_mark_endpoints_dirty(card); 785 snd_soc_dapm_sync(&card->dapm); 786 } 787 788 /* powers up audio subsystem after a suspend */ 789 int snd_soc_resume(struct device *dev) 790 { 791 struct snd_soc_card *card = dev_get_drvdata(dev); 792 bool bus_control = false; 793 int i; 794 795 /* If the card is not initialized yet there is nothing to do */ 796 if (!card->instantiated) 797 return 0; 798 799 /* activate pins from sleep state */ 800 for (i = 0; i < card->num_rtd; i++) { 801 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 802 struct snd_soc_dai **codec_dais = rtd->codec_dais; 803 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 804 int j; 805 806 if (cpu_dai->active) 807 pinctrl_pm_select_default_state(cpu_dai->dev); 808 809 for (j = 0; j < rtd->num_codecs; j++) { 810 struct snd_soc_dai *codec_dai = codec_dais[j]; 811 if (codec_dai->active) 812 pinctrl_pm_select_default_state(codec_dai->dev); 813 } 814 } 815 816 /* 817 * DAIs that also act as the control bus master might have other drivers 818 * hanging off them so need to resume immediately. Other drivers don't 819 * have that problem and may take a substantial amount of time to resume 820 * due to I/O costs and anti-pop so handle them out of line. 821 */ 822 for (i = 0; i < card->num_rtd; i++) { 823 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai; 824 bus_control |= cpu_dai->driver->bus_control; 825 } 826 if (bus_control) { 827 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n"); 828 soc_resume_deferred(&card->deferred_resume_work); 829 } else { 830 dev_dbg(dev, "ASoC: Scheduling resume work\n"); 831 if (!schedule_work(&card->deferred_resume_work)) 832 dev_err(dev, "ASoC: resume work item may be lost\n"); 833 } 834 835 return 0; 836 } 837 EXPORT_SYMBOL_GPL(snd_soc_resume); 838 #else 839 #define snd_soc_suspend NULL 840 #define snd_soc_resume NULL 841 #endif 842 843 static const struct snd_soc_dai_ops null_dai_ops = { 844 }; 845 846 static struct snd_soc_component *soc_find_component( 847 const struct device_node *of_node, const char *name) 848 { 849 struct snd_soc_component *component; 850 851 lockdep_assert_held(&client_mutex); 852 853 list_for_each_entry(component, &component_list, list) { 854 if (of_node) { 855 if (component->dev->of_node == of_node) 856 return component; 857 } else if (strcmp(component->name, name) == 0) { 858 return component; 859 } 860 } 861 862 return NULL; 863 } 864 865 static struct snd_soc_dai *snd_soc_find_dai( 866 const struct snd_soc_dai_link_component *dlc) 867 { 868 struct snd_soc_component *component; 869 struct snd_soc_dai *dai; 870 871 lockdep_assert_held(&client_mutex); 872 873 /* Find CPU DAI from registered DAIs*/ 874 list_for_each_entry(component, &component_list, list) { 875 if (dlc->of_node && component->dev->of_node != dlc->of_node) 876 continue; 877 if (dlc->name && strcmp(component->name, dlc->name)) 878 continue; 879 list_for_each_entry(dai, &component->dai_list, list) { 880 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)) 881 continue; 882 883 return dai; 884 } 885 } 886 887 return NULL; 888 } 889 890 static int soc_bind_dai_link(struct snd_soc_card *card, int num) 891 { 892 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 893 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 894 struct snd_soc_dai_link_component *codecs = dai_link->codecs; 895 struct snd_soc_dai_link_component cpu_dai_component; 896 struct snd_soc_dai **codec_dais = rtd->codec_dais; 897 struct snd_soc_platform *platform; 898 const char *platform_name; 899 int i; 900 901 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num); 902 903 cpu_dai_component.name = dai_link->cpu_name; 904 cpu_dai_component.of_node = dai_link->cpu_of_node; 905 cpu_dai_component.dai_name = dai_link->cpu_dai_name; 906 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component); 907 if (!rtd->cpu_dai) { 908 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n", 909 dai_link->cpu_dai_name); 910 return -EPROBE_DEFER; 911 } 912 913 rtd->num_codecs = dai_link->num_codecs; 914 915 /* Find CODEC from registered CODECs */ 916 for (i = 0; i < rtd->num_codecs; i++) { 917 codec_dais[i] = snd_soc_find_dai(&codecs[i]); 918 if (!codec_dais[i]) { 919 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n", 920 codecs[i].dai_name); 921 return -EPROBE_DEFER; 922 } 923 } 924 925 /* Single codec links expect codec and codec_dai in runtime data */ 926 rtd->codec_dai = codec_dais[0]; 927 rtd->codec = rtd->codec_dai->codec; 928 929 /* if there's no platform we match on the empty platform */ 930 platform_name = dai_link->platform_name; 931 if (!platform_name && !dai_link->platform_of_node) 932 platform_name = "snd-soc-dummy"; 933 934 /* find one from the set of registered platforms */ 935 list_for_each_entry(platform, &platform_list, list) { 936 if (dai_link->platform_of_node) { 937 if (platform->dev->of_node != 938 dai_link->platform_of_node) 939 continue; 940 } else { 941 if (strcmp(platform->component.name, platform_name)) 942 continue; 943 } 944 945 rtd->platform = platform; 946 } 947 if (!rtd->platform) { 948 dev_err(card->dev, "ASoC: platform %s not registered\n", 949 dai_link->platform_name); 950 return -EPROBE_DEFER; 951 } 952 953 card->num_rtd++; 954 955 return 0; 956 } 957 958 static void soc_remove_component(struct snd_soc_component *component) 959 { 960 if (!component->probed) 961 return; 962 963 /* This is a HACK and will be removed soon */ 964 if (component->codec) 965 list_del(&component->codec->card_list); 966 967 if (component->remove) 968 component->remove(component); 969 970 snd_soc_dapm_free(snd_soc_component_get_dapm(component)); 971 972 soc_cleanup_component_debugfs(component); 973 component->probed = 0; 974 module_put(component->dev->driver->owner); 975 } 976 977 static void soc_remove_dai(struct snd_soc_dai *dai, int order) 978 { 979 int err; 980 981 if (dai && dai->probed && 982 dai->driver->remove_order == order) { 983 if (dai->driver->remove) { 984 err = dai->driver->remove(dai); 985 if (err < 0) 986 dev_err(dai->dev, 987 "ASoC: failed to remove %s: %d\n", 988 dai->name, err); 989 } 990 dai->probed = 0; 991 } 992 } 993 994 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order) 995 { 996 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 997 int i; 998 999 /* unregister the rtd device */ 1000 if (rtd->dev_registered) { 1001 device_unregister(rtd->dev); 1002 rtd->dev_registered = 0; 1003 } 1004 1005 /* remove the CODEC DAI */ 1006 for (i = 0; i < rtd->num_codecs; i++) 1007 soc_remove_dai(rtd->codec_dais[i], order); 1008 1009 soc_remove_dai(rtd->cpu_dai, order); 1010 } 1011 1012 static void soc_remove_link_components(struct snd_soc_card *card, int num, 1013 int order) 1014 { 1015 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1016 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1017 struct snd_soc_platform *platform = rtd->platform; 1018 struct snd_soc_component *component; 1019 int i; 1020 1021 /* remove the platform */ 1022 if (platform && platform->component.driver->remove_order == order) 1023 soc_remove_component(&platform->component); 1024 1025 /* remove the CODEC-side CODEC */ 1026 for (i = 0; i < rtd->num_codecs; i++) { 1027 component = rtd->codec_dais[i]->component; 1028 if (component->driver->remove_order == order) 1029 soc_remove_component(component); 1030 } 1031 1032 /* remove any CPU-side CODEC */ 1033 if (cpu_dai) { 1034 if (cpu_dai->component->driver->remove_order == order) 1035 soc_remove_component(cpu_dai->component); 1036 } 1037 } 1038 1039 static void soc_remove_dai_links(struct snd_soc_card *card) 1040 { 1041 int dai, order; 1042 1043 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1044 order++) { 1045 for (dai = 0; dai < card->num_rtd; dai++) 1046 soc_remove_link_dais(card, dai, order); 1047 } 1048 1049 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1050 order++) { 1051 for (dai = 0; dai < card->num_rtd; dai++) 1052 soc_remove_link_components(card, dai, order); 1053 } 1054 1055 card->num_rtd = 0; 1056 } 1057 1058 static void soc_set_name_prefix(struct snd_soc_card *card, 1059 struct snd_soc_component *component) 1060 { 1061 int i; 1062 1063 if (card->codec_conf == NULL) 1064 return; 1065 1066 for (i = 0; i < card->num_configs; i++) { 1067 struct snd_soc_codec_conf *map = &card->codec_conf[i]; 1068 if (map->of_node && component->dev->of_node != map->of_node) 1069 continue; 1070 if (map->dev_name && strcmp(component->name, map->dev_name)) 1071 continue; 1072 component->name_prefix = map->name_prefix; 1073 break; 1074 } 1075 } 1076 1077 static int soc_probe_component(struct snd_soc_card *card, 1078 struct snd_soc_component *component) 1079 { 1080 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); 1081 struct snd_soc_dai *dai; 1082 int ret; 1083 1084 if (component->probed) 1085 return 0; 1086 1087 component->card = card; 1088 dapm->card = card; 1089 soc_set_name_prefix(card, component); 1090 1091 if (!try_module_get(component->dev->driver->owner)) 1092 return -ENODEV; 1093 1094 soc_init_component_debugfs(component); 1095 1096 if (component->dapm_widgets) { 1097 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets, 1098 component->num_dapm_widgets); 1099 1100 if (ret != 0) { 1101 dev_err(component->dev, 1102 "Failed to create new controls %d\n", ret); 1103 goto err_probe; 1104 } 1105 } 1106 1107 list_for_each_entry(dai, &component->dai_list, list) { 1108 ret = snd_soc_dapm_new_dai_widgets(dapm, dai); 1109 if (ret != 0) { 1110 dev_err(component->dev, 1111 "Failed to create DAI widgets %d\n", ret); 1112 goto err_probe; 1113 } 1114 } 1115 1116 if (component->probe) { 1117 ret = component->probe(component); 1118 if (ret < 0) { 1119 dev_err(component->dev, 1120 "ASoC: failed to probe component %d\n", ret); 1121 goto err_probe; 1122 } 1123 1124 WARN(dapm->idle_bias_off && 1125 dapm->bias_level != SND_SOC_BIAS_OFF, 1126 "codec %s can not start from non-off bias with idle_bias_off==1\n", 1127 component->name); 1128 } 1129 1130 if (component->controls) 1131 snd_soc_add_component_controls(component, component->controls, 1132 component->num_controls); 1133 if (component->dapm_routes) 1134 snd_soc_dapm_add_routes(dapm, component->dapm_routes, 1135 component->num_dapm_routes); 1136 1137 component->probed = 1; 1138 list_add(&dapm->list, &card->dapm_list); 1139 1140 /* This is a HACK and will be removed soon */ 1141 if (component->codec) 1142 list_add(&component->codec->card_list, &card->codec_dev_list); 1143 1144 return 0; 1145 1146 err_probe: 1147 soc_cleanup_component_debugfs(component); 1148 module_put(component->dev->driver->owner); 1149 1150 return ret; 1151 } 1152 1153 static void rtd_release(struct device *dev) 1154 { 1155 kfree(dev); 1156 } 1157 1158 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd, 1159 const char *name) 1160 { 1161 int ret = 0; 1162 1163 /* register the rtd device */ 1164 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL); 1165 if (!rtd->dev) 1166 return -ENOMEM; 1167 device_initialize(rtd->dev); 1168 rtd->dev->parent = rtd->card->dev; 1169 rtd->dev->release = rtd_release; 1170 rtd->dev->groups = soc_dev_attr_groups; 1171 dev_set_name(rtd->dev, "%s", name); 1172 dev_set_drvdata(rtd->dev, rtd); 1173 mutex_init(&rtd->pcm_mutex); 1174 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients); 1175 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients); 1176 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients); 1177 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients); 1178 ret = device_add(rtd->dev); 1179 if (ret < 0) { 1180 /* calling put_device() here to free the rtd->dev */ 1181 put_device(rtd->dev); 1182 dev_err(rtd->card->dev, 1183 "ASoC: failed to register runtime device: %d\n", ret); 1184 return ret; 1185 } 1186 rtd->dev_registered = 1; 1187 return 0; 1188 } 1189 1190 static int soc_probe_link_components(struct snd_soc_card *card, int num, 1191 int order) 1192 { 1193 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1194 struct snd_soc_platform *platform = rtd->platform; 1195 struct snd_soc_component *component; 1196 int i, ret; 1197 1198 /* probe the CPU-side component, if it is a CODEC */ 1199 component = rtd->cpu_dai->component; 1200 if (component->driver->probe_order == order) { 1201 ret = soc_probe_component(card, component); 1202 if (ret < 0) 1203 return ret; 1204 } 1205 1206 /* probe the CODEC-side components */ 1207 for (i = 0; i < rtd->num_codecs; i++) { 1208 component = rtd->codec_dais[i]->component; 1209 if (component->driver->probe_order == order) { 1210 ret = soc_probe_component(card, component); 1211 if (ret < 0) 1212 return ret; 1213 } 1214 } 1215 1216 /* probe the platform */ 1217 if (platform->component.driver->probe_order == order) { 1218 ret = soc_probe_component(card, &platform->component); 1219 if (ret < 0) 1220 return ret; 1221 } 1222 1223 return 0; 1224 } 1225 1226 static int soc_probe_dai(struct snd_soc_dai *dai, int order) 1227 { 1228 int ret; 1229 1230 if (!dai->probed && dai->driver->probe_order == order) { 1231 if (dai->driver->probe) { 1232 ret = dai->driver->probe(dai); 1233 if (ret < 0) { 1234 dev_err(dai->dev, 1235 "ASoC: failed to probe DAI %s: %d\n", 1236 dai->name, ret); 1237 return ret; 1238 } 1239 } 1240 1241 dai->probed = 1; 1242 } 1243 1244 return 0; 1245 } 1246 1247 static int soc_link_dai_widgets(struct snd_soc_card *card, 1248 struct snd_soc_dai_link *dai_link, 1249 struct snd_soc_pcm_runtime *rtd) 1250 { 1251 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1252 struct snd_soc_dai *codec_dai = rtd->codec_dai; 1253 struct snd_soc_dapm_widget *play_w, *capture_w; 1254 int ret; 1255 1256 if (rtd->num_codecs > 1) 1257 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n"); 1258 1259 /* link the DAI widgets */ 1260 play_w = codec_dai->playback_widget; 1261 capture_w = cpu_dai->capture_widget; 1262 if (play_w && capture_w) { 1263 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1264 capture_w, play_w); 1265 if (ret != 0) { 1266 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1267 play_w->name, capture_w->name, ret); 1268 return ret; 1269 } 1270 } 1271 1272 play_w = cpu_dai->playback_widget; 1273 capture_w = codec_dai->capture_widget; 1274 if (play_w && capture_w) { 1275 ret = snd_soc_dapm_new_pcm(card, dai_link->params, 1276 capture_w, play_w); 1277 if (ret != 0) { 1278 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", 1279 play_w->name, capture_w->name, ret); 1280 return ret; 1281 } 1282 } 1283 1284 return 0; 1285 } 1286 1287 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order) 1288 { 1289 struct snd_soc_dai_link *dai_link = &card->dai_link[num]; 1290 struct snd_soc_pcm_runtime *rtd = &card->rtd[num]; 1291 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1292 int i, ret; 1293 1294 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n", 1295 card->name, num, order); 1296 1297 /* set default power off timeout */ 1298 rtd->pmdown_time = pmdown_time; 1299 1300 ret = soc_probe_dai(cpu_dai, order); 1301 if (ret) 1302 return ret; 1303 1304 /* probe the CODEC DAI */ 1305 for (i = 0; i < rtd->num_codecs; i++) { 1306 ret = soc_probe_dai(rtd->codec_dais[i], order); 1307 if (ret) 1308 return ret; 1309 } 1310 1311 /* complete DAI probe during last probe */ 1312 if (order != SND_SOC_COMP_ORDER_LAST) 1313 return 0; 1314 1315 /* do machine specific initialization */ 1316 if (dai_link->init) { 1317 ret = dai_link->init(rtd); 1318 if (ret < 0) { 1319 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1320 dai_link->name, ret); 1321 return ret; 1322 } 1323 } 1324 1325 ret = soc_post_component_init(rtd, dai_link->name); 1326 if (ret) 1327 return ret; 1328 1329 #ifdef CONFIG_DEBUG_FS 1330 /* add DPCM sysfs entries */ 1331 if (dai_link->dynamic) { 1332 ret = soc_dpcm_debugfs_add(rtd); 1333 if (ret < 0) { 1334 dev_err(rtd->dev, 1335 "ASoC: failed to add dpcm sysfs entries: %d\n", 1336 ret); 1337 return ret; 1338 } 1339 } 1340 #endif 1341 1342 if (cpu_dai->driver->compress_dai) { 1343 /*create compress_device"*/ 1344 ret = soc_new_compress(rtd, num); 1345 if (ret < 0) { 1346 dev_err(card->dev, "ASoC: can't create compress %s\n", 1347 dai_link->stream_name); 1348 return ret; 1349 } 1350 } else { 1351 1352 if (!dai_link->params) { 1353 /* create the pcm */ 1354 ret = soc_new_pcm(rtd, num); 1355 if (ret < 0) { 1356 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n", 1357 dai_link->stream_name, ret); 1358 return ret; 1359 } 1360 } else { 1361 INIT_DELAYED_WORK(&rtd->delayed_work, 1362 codec2codec_close_delayed_work); 1363 1364 /* link the DAI widgets */ 1365 ret = soc_link_dai_widgets(card, dai_link, rtd); 1366 if (ret) 1367 return ret; 1368 } 1369 } 1370 1371 return 0; 1372 } 1373 1374 static int soc_bind_aux_dev(struct snd_soc_card *card, int num) 1375 { 1376 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1377 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1378 const char *name = aux_dev->codec_name; 1379 1380 rtd->component = soc_find_component(aux_dev->codec_of_node, name); 1381 if (!rtd->component) { 1382 if (aux_dev->codec_of_node) 1383 name = of_node_full_name(aux_dev->codec_of_node); 1384 1385 dev_err(card->dev, "ASoC: %s not registered\n", name); 1386 return -EPROBE_DEFER; 1387 } 1388 1389 /* 1390 * Some places still reference rtd->codec, so we have to keep that 1391 * initialized if the component is a CODEC. Once all those references 1392 * have been removed, this code can be removed as well. 1393 */ 1394 rtd->codec = rtd->component->codec; 1395 1396 return 0; 1397 } 1398 1399 static int soc_probe_aux_dev(struct snd_soc_card *card, int num) 1400 { 1401 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1402 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; 1403 int ret; 1404 1405 ret = soc_probe_component(card, rtd->component); 1406 if (ret < 0) 1407 return ret; 1408 1409 /* do machine specific initialization */ 1410 if (aux_dev->init) { 1411 ret = aux_dev->init(rtd->component); 1412 if (ret < 0) { 1413 dev_err(card->dev, "ASoC: failed to init %s: %d\n", 1414 aux_dev->name, ret); 1415 return ret; 1416 } 1417 } 1418 1419 return soc_post_component_init(rtd, aux_dev->name); 1420 } 1421 1422 static void soc_remove_aux_dev(struct snd_soc_card *card, int num) 1423 { 1424 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num]; 1425 struct snd_soc_component *component = rtd->component; 1426 1427 /* unregister the rtd device */ 1428 if (rtd->dev_registered) { 1429 device_remove_file(rtd->dev, &dev_attr_codec_reg); 1430 device_unregister(rtd->dev); 1431 rtd->dev_registered = 0; 1432 } 1433 1434 if (component && component->probed) 1435 soc_remove_component(component); 1436 } 1437 1438 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec) 1439 { 1440 int ret; 1441 1442 if (codec->cache_init) 1443 return 0; 1444 1445 ret = snd_soc_cache_init(codec); 1446 if (ret < 0) { 1447 dev_err(codec->dev, 1448 "ASoC: Failed to set cache compression type: %d\n", 1449 ret); 1450 return ret; 1451 } 1452 codec->cache_init = 1; 1453 return 0; 1454 } 1455 1456 /** 1457 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime 1458 * @rtd: The runtime for which the DAI link format should be changed 1459 * @dai_fmt: The new DAI link format 1460 * 1461 * This function updates the DAI link format for all DAIs connected to the DAI 1462 * link for the specified runtime. 1463 * 1464 * Note: For setups with a static format set the dai_fmt field in the 1465 * corresponding snd_dai_link struct instead of using this function. 1466 * 1467 * Returns 0 on success, otherwise a negative error code. 1468 */ 1469 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd, 1470 unsigned int dai_fmt) 1471 { 1472 struct snd_soc_dai **codec_dais = rtd->codec_dais; 1473 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1474 unsigned int i; 1475 int ret; 1476 1477 for (i = 0; i < rtd->num_codecs; i++) { 1478 struct snd_soc_dai *codec_dai = codec_dais[i]; 1479 1480 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt); 1481 if (ret != 0 && ret != -ENOTSUPP) { 1482 dev_warn(codec_dai->dev, 1483 "ASoC: Failed to set DAI format: %d\n", ret); 1484 return ret; 1485 } 1486 } 1487 1488 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */ 1489 if (cpu_dai->codec) { 1490 unsigned int inv_dai_fmt; 1491 1492 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK; 1493 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { 1494 case SND_SOC_DAIFMT_CBM_CFM: 1495 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; 1496 break; 1497 case SND_SOC_DAIFMT_CBM_CFS: 1498 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM; 1499 break; 1500 case SND_SOC_DAIFMT_CBS_CFM: 1501 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS; 1502 break; 1503 case SND_SOC_DAIFMT_CBS_CFS: 1504 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM; 1505 break; 1506 } 1507 1508 dai_fmt = inv_dai_fmt; 1509 } 1510 1511 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt); 1512 if (ret != 0 && ret != -ENOTSUPP) { 1513 dev_warn(cpu_dai->dev, 1514 "ASoC: Failed to set DAI format: %d\n", ret); 1515 return ret; 1516 } 1517 1518 return 0; 1519 } 1520 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt); 1521 1522 static int snd_soc_instantiate_card(struct snd_soc_card *card) 1523 { 1524 struct snd_soc_codec *codec; 1525 int ret, i, order; 1526 1527 mutex_lock(&client_mutex); 1528 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT); 1529 1530 /* bind DAIs */ 1531 for (i = 0; i < card->num_links; i++) { 1532 ret = soc_bind_dai_link(card, i); 1533 if (ret != 0) 1534 goto base_error; 1535 } 1536 1537 /* bind aux_devs too */ 1538 for (i = 0; i < card->num_aux_devs; i++) { 1539 ret = soc_bind_aux_dev(card, i); 1540 if (ret != 0) 1541 goto base_error; 1542 } 1543 1544 /* initialize the register cache for each available codec */ 1545 list_for_each_entry(codec, &codec_list, list) { 1546 if (codec->cache_init) 1547 continue; 1548 ret = snd_soc_init_codec_cache(codec); 1549 if (ret < 0) 1550 goto base_error; 1551 } 1552 1553 /* card bind complete so register a sound card */ 1554 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 1555 card->owner, 0, &card->snd_card); 1556 if (ret < 0) { 1557 dev_err(card->dev, 1558 "ASoC: can't create sound card for card %s: %d\n", 1559 card->name, ret); 1560 goto base_error; 1561 } 1562 1563 card->dapm.bias_level = SND_SOC_BIAS_OFF; 1564 card->dapm.dev = card->dev; 1565 card->dapm.card = card; 1566 list_add(&card->dapm.list, &card->dapm_list); 1567 1568 #ifdef CONFIG_DEBUG_FS 1569 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root); 1570 #endif 1571 1572 #ifdef CONFIG_PM_SLEEP 1573 /* deferred resume work */ 1574 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); 1575 #endif 1576 1577 if (card->dapm_widgets) 1578 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, 1579 card->num_dapm_widgets); 1580 1581 /* initialise the sound card only once */ 1582 if (card->probe) { 1583 ret = card->probe(card); 1584 if (ret < 0) 1585 goto card_probe_error; 1586 } 1587 1588 /* probe all components used by DAI links on this card */ 1589 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1590 order++) { 1591 for (i = 0; i < card->num_links; i++) { 1592 ret = soc_probe_link_components(card, i, order); 1593 if (ret < 0) { 1594 dev_err(card->dev, 1595 "ASoC: failed to instantiate card %d\n", 1596 ret); 1597 goto probe_dai_err; 1598 } 1599 } 1600 } 1601 1602 /* probe all DAI links on this card */ 1603 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; 1604 order++) { 1605 for (i = 0; i < card->num_links; i++) { 1606 ret = soc_probe_link_dais(card, i, order); 1607 if (ret < 0) { 1608 dev_err(card->dev, 1609 "ASoC: failed to instantiate card %d\n", 1610 ret); 1611 goto probe_dai_err; 1612 } 1613 } 1614 } 1615 1616 for (i = 0; i < card->num_aux_devs; i++) { 1617 ret = soc_probe_aux_dev(card, i); 1618 if (ret < 0) { 1619 dev_err(card->dev, 1620 "ASoC: failed to add auxiliary devices %d\n", 1621 ret); 1622 goto probe_aux_dev_err; 1623 } 1624 } 1625 1626 snd_soc_dapm_link_dai_widgets(card); 1627 snd_soc_dapm_connect_dai_link_widgets(card); 1628 1629 if (card->controls) 1630 snd_soc_add_card_controls(card, card->controls, card->num_controls); 1631 1632 if (card->dapm_routes) 1633 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes, 1634 card->num_dapm_routes); 1635 1636 for (i = 0; i < card->num_links; i++) { 1637 if (card->dai_link[i].dai_fmt) 1638 snd_soc_runtime_set_dai_fmt(&card->rtd[i], 1639 card->dai_link[i].dai_fmt); 1640 } 1641 1642 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname), 1643 "%s", card->name); 1644 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname), 1645 "%s", card->long_name ? card->long_name : card->name); 1646 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver), 1647 "%s", card->driver_name ? card->driver_name : card->name); 1648 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) { 1649 switch (card->snd_card->driver[i]) { 1650 case '_': 1651 case '-': 1652 case '\0': 1653 break; 1654 default: 1655 if (!isalnum(card->snd_card->driver[i])) 1656 card->snd_card->driver[i] = '_'; 1657 break; 1658 } 1659 } 1660 1661 if (card->late_probe) { 1662 ret = card->late_probe(card); 1663 if (ret < 0) { 1664 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n", 1665 card->name, ret); 1666 goto probe_aux_dev_err; 1667 } 1668 } 1669 1670 snd_soc_dapm_new_widgets(card); 1671 1672 ret = snd_card_register(card->snd_card); 1673 if (ret < 0) { 1674 dev_err(card->dev, "ASoC: failed to register soundcard %d\n", 1675 ret); 1676 goto probe_aux_dev_err; 1677 } 1678 1679 card->instantiated = 1; 1680 snd_soc_dapm_sync(&card->dapm); 1681 mutex_unlock(&card->mutex); 1682 mutex_unlock(&client_mutex); 1683 1684 return 0; 1685 1686 probe_aux_dev_err: 1687 for (i = 0; i < card->num_aux_devs; i++) 1688 soc_remove_aux_dev(card, i); 1689 1690 probe_dai_err: 1691 soc_remove_dai_links(card); 1692 1693 card_probe_error: 1694 if (card->remove) 1695 card->remove(card); 1696 1697 snd_card_free(card->snd_card); 1698 1699 base_error: 1700 mutex_unlock(&card->mutex); 1701 mutex_unlock(&client_mutex); 1702 1703 return ret; 1704 } 1705 1706 /* probes a new socdev */ 1707 static int soc_probe(struct platform_device *pdev) 1708 { 1709 struct snd_soc_card *card = platform_get_drvdata(pdev); 1710 1711 /* 1712 * no card, so machine driver should be registering card 1713 * we should not be here in that case so ret error 1714 */ 1715 if (!card) 1716 return -EINVAL; 1717 1718 dev_warn(&pdev->dev, 1719 "ASoC: machine %s should use snd_soc_register_card()\n", 1720 card->name); 1721 1722 /* Bodge while we unpick instantiation */ 1723 card->dev = &pdev->dev; 1724 1725 return snd_soc_register_card(card); 1726 } 1727 1728 static int soc_cleanup_card_resources(struct snd_soc_card *card) 1729 { 1730 int i; 1731 1732 /* make sure any delayed work runs */ 1733 for (i = 0; i < card->num_rtd; i++) { 1734 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1735 flush_delayed_work(&rtd->delayed_work); 1736 } 1737 1738 /* remove auxiliary devices */ 1739 for (i = 0; i < card->num_aux_devs; i++) 1740 soc_remove_aux_dev(card, i); 1741 1742 /* remove and free each DAI */ 1743 soc_remove_dai_links(card); 1744 1745 soc_cleanup_card_debugfs(card); 1746 1747 /* remove the card */ 1748 if (card->remove) 1749 card->remove(card); 1750 1751 snd_soc_dapm_free(&card->dapm); 1752 1753 snd_card_free(card->snd_card); 1754 return 0; 1755 1756 } 1757 1758 /* removes a socdev */ 1759 static int soc_remove(struct platform_device *pdev) 1760 { 1761 struct snd_soc_card *card = platform_get_drvdata(pdev); 1762 1763 snd_soc_unregister_card(card); 1764 return 0; 1765 } 1766 1767 int snd_soc_poweroff(struct device *dev) 1768 { 1769 struct snd_soc_card *card = dev_get_drvdata(dev); 1770 int i; 1771 1772 if (!card->instantiated) 1773 return 0; 1774 1775 /* Flush out pmdown_time work - we actually do want to run it 1776 * now, we're shutting down so no imminent restart. */ 1777 for (i = 0; i < card->num_rtd; i++) { 1778 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1779 flush_delayed_work(&rtd->delayed_work); 1780 } 1781 1782 snd_soc_dapm_shutdown(card); 1783 1784 /* deactivate pins to sleep state */ 1785 for (i = 0; i < card->num_rtd; i++) { 1786 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 1787 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1788 int j; 1789 1790 pinctrl_pm_select_sleep_state(cpu_dai->dev); 1791 for (j = 0; j < rtd->num_codecs; j++) { 1792 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 1793 pinctrl_pm_select_sleep_state(codec_dai->dev); 1794 } 1795 } 1796 1797 return 0; 1798 } 1799 EXPORT_SYMBOL_GPL(snd_soc_poweroff); 1800 1801 const struct dev_pm_ops snd_soc_pm_ops = { 1802 .suspend = snd_soc_suspend, 1803 .resume = snd_soc_resume, 1804 .freeze = snd_soc_suspend, 1805 .thaw = snd_soc_resume, 1806 .poweroff = snd_soc_poweroff, 1807 .restore = snd_soc_resume, 1808 }; 1809 EXPORT_SYMBOL_GPL(snd_soc_pm_ops); 1810 1811 /* ASoC platform driver */ 1812 static struct platform_driver soc_driver = { 1813 .driver = { 1814 .name = "soc-audio", 1815 .pm = &snd_soc_pm_ops, 1816 }, 1817 .probe = soc_probe, 1818 .remove = soc_remove, 1819 }; 1820 1821 /** 1822 * snd_soc_cnew - create new control 1823 * @_template: control template 1824 * @data: control private data 1825 * @long_name: control long name 1826 * @prefix: control name prefix 1827 * 1828 * Create a new mixer control from a template control. 1829 * 1830 * Returns 0 for success, else error. 1831 */ 1832 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, 1833 void *data, const char *long_name, 1834 const char *prefix) 1835 { 1836 struct snd_kcontrol_new template; 1837 struct snd_kcontrol *kcontrol; 1838 char *name = NULL; 1839 1840 memcpy(&template, _template, sizeof(template)); 1841 template.index = 0; 1842 1843 if (!long_name) 1844 long_name = template.name; 1845 1846 if (prefix) { 1847 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name); 1848 if (!name) 1849 return NULL; 1850 1851 template.name = name; 1852 } else { 1853 template.name = long_name; 1854 } 1855 1856 kcontrol = snd_ctl_new1(&template, data); 1857 1858 kfree(name); 1859 1860 return kcontrol; 1861 } 1862 EXPORT_SYMBOL_GPL(snd_soc_cnew); 1863 1864 static int snd_soc_add_controls(struct snd_card *card, struct device *dev, 1865 const struct snd_kcontrol_new *controls, int num_controls, 1866 const char *prefix, void *data) 1867 { 1868 int err, i; 1869 1870 for (i = 0; i < num_controls; i++) { 1871 const struct snd_kcontrol_new *control = &controls[i]; 1872 err = snd_ctl_add(card, snd_soc_cnew(control, data, 1873 control->name, prefix)); 1874 if (err < 0) { 1875 dev_err(dev, "ASoC: Failed to add %s: %d\n", 1876 control->name, err); 1877 return err; 1878 } 1879 } 1880 1881 return 0; 1882 } 1883 1884 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card, 1885 const char *name) 1886 { 1887 struct snd_card *card = soc_card->snd_card; 1888 struct snd_kcontrol *kctl; 1889 1890 if (unlikely(!name)) 1891 return NULL; 1892 1893 list_for_each_entry(kctl, &card->controls, list) 1894 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) 1895 return kctl; 1896 return NULL; 1897 } 1898 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol); 1899 1900 /** 1901 * snd_soc_add_component_controls - Add an array of controls to a component. 1902 * 1903 * @component: Component to add controls to 1904 * @controls: Array of controls to add 1905 * @num_controls: Number of elements in the array 1906 * 1907 * Return: 0 for success, else error. 1908 */ 1909 int snd_soc_add_component_controls(struct snd_soc_component *component, 1910 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1911 { 1912 struct snd_card *card = component->card->snd_card; 1913 1914 return snd_soc_add_controls(card, component->dev, controls, 1915 num_controls, component->name_prefix, component); 1916 } 1917 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls); 1918 1919 /** 1920 * snd_soc_add_codec_controls - add an array of controls to a codec. 1921 * Convenience function to add a list of controls. Many codecs were 1922 * duplicating this code. 1923 * 1924 * @codec: codec to add controls to 1925 * @controls: array of controls to add 1926 * @num_controls: number of elements in the array 1927 * 1928 * Return 0 for success, else error. 1929 */ 1930 int snd_soc_add_codec_controls(struct snd_soc_codec *codec, 1931 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1932 { 1933 return snd_soc_add_component_controls(&codec->component, controls, 1934 num_controls); 1935 } 1936 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls); 1937 1938 /** 1939 * snd_soc_add_platform_controls - add an array of controls to a platform. 1940 * Convenience function to add a list of controls. 1941 * 1942 * @platform: platform to add controls to 1943 * @controls: array of controls to add 1944 * @num_controls: number of elements in the array 1945 * 1946 * Return 0 for success, else error. 1947 */ 1948 int snd_soc_add_platform_controls(struct snd_soc_platform *platform, 1949 const struct snd_kcontrol_new *controls, unsigned int num_controls) 1950 { 1951 return snd_soc_add_component_controls(&platform->component, controls, 1952 num_controls); 1953 } 1954 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls); 1955 1956 /** 1957 * snd_soc_add_card_controls - add an array of controls to a SoC card. 1958 * Convenience function to add a list of controls. 1959 * 1960 * @soc_card: SoC card to add controls to 1961 * @controls: array of controls to add 1962 * @num_controls: number of elements in the array 1963 * 1964 * Return 0 for success, else error. 1965 */ 1966 int snd_soc_add_card_controls(struct snd_soc_card *soc_card, 1967 const struct snd_kcontrol_new *controls, int num_controls) 1968 { 1969 struct snd_card *card = soc_card->snd_card; 1970 1971 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls, 1972 NULL, soc_card); 1973 } 1974 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls); 1975 1976 /** 1977 * snd_soc_add_dai_controls - add an array of controls to a DAI. 1978 * Convienience function to add a list of controls. 1979 * 1980 * @dai: DAI to add controls to 1981 * @controls: array of controls to add 1982 * @num_controls: number of elements in the array 1983 * 1984 * Return 0 for success, else error. 1985 */ 1986 int snd_soc_add_dai_controls(struct snd_soc_dai *dai, 1987 const struct snd_kcontrol_new *controls, int num_controls) 1988 { 1989 struct snd_card *card = dai->component->card->snd_card; 1990 1991 return snd_soc_add_controls(card, dai->dev, controls, num_controls, 1992 NULL, dai); 1993 } 1994 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls); 1995 1996 /** 1997 * snd_soc_dai_set_sysclk - configure DAI system or master clock. 1998 * @dai: DAI 1999 * @clk_id: DAI specific clock ID 2000 * @freq: new clock frequency in Hz 2001 * @dir: new clock direction - input/output. 2002 * 2003 * Configures the DAI master (MCLK) or system (SYSCLK) clocking. 2004 */ 2005 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, 2006 unsigned int freq, int dir) 2007 { 2008 if (dai->driver && dai->driver->ops->set_sysclk) 2009 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir); 2010 else if (dai->codec && dai->codec->driver->set_sysclk) 2011 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0, 2012 freq, dir); 2013 else 2014 return -ENOTSUPP; 2015 } 2016 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); 2017 2018 /** 2019 * snd_soc_codec_set_sysclk - configure CODEC system or master clock. 2020 * @codec: CODEC 2021 * @clk_id: DAI specific clock ID 2022 * @source: Source for the clock 2023 * @freq: new clock frequency in Hz 2024 * @dir: new clock direction - input/output. 2025 * 2026 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking. 2027 */ 2028 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id, 2029 int source, unsigned int freq, int dir) 2030 { 2031 if (codec->driver->set_sysclk) 2032 return codec->driver->set_sysclk(codec, clk_id, source, 2033 freq, dir); 2034 else 2035 return -ENOTSUPP; 2036 } 2037 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk); 2038 2039 /** 2040 * snd_soc_dai_set_clkdiv - configure DAI clock dividers. 2041 * @dai: DAI 2042 * @div_id: DAI specific clock divider ID 2043 * @div: new clock divisor. 2044 * 2045 * Configures the clock dividers. This is used to derive the best DAI bit and 2046 * frame clocks from the system or master clock. It's best to set the DAI bit 2047 * and frame clocks as low as possible to save system power. 2048 */ 2049 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, 2050 int div_id, int div) 2051 { 2052 if (dai->driver && dai->driver->ops->set_clkdiv) 2053 return dai->driver->ops->set_clkdiv(dai, div_id, div); 2054 else 2055 return -EINVAL; 2056 } 2057 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); 2058 2059 /** 2060 * snd_soc_dai_set_pll - configure DAI PLL. 2061 * @dai: DAI 2062 * @pll_id: DAI specific PLL ID 2063 * @source: DAI specific source for the PLL 2064 * @freq_in: PLL input clock frequency in Hz 2065 * @freq_out: requested PLL output clock frequency in Hz 2066 * 2067 * Configures and enables PLL to generate output clock based on input clock. 2068 */ 2069 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source, 2070 unsigned int freq_in, unsigned int freq_out) 2071 { 2072 if (dai->driver && dai->driver->ops->set_pll) 2073 return dai->driver->ops->set_pll(dai, pll_id, source, 2074 freq_in, freq_out); 2075 else if (dai->codec && dai->codec->driver->set_pll) 2076 return dai->codec->driver->set_pll(dai->codec, pll_id, source, 2077 freq_in, freq_out); 2078 else 2079 return -EINVAL; 2080 } 2081 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); 2082 2083 /* 2084 * snd_soc_codec_set_pll - configure codec PLL. 2085 * @codec: CODEC 2086 * @pll_id: DAI specific PLL ID 2087 * @source: DAI specific source for the PLL 2088 * @freq_in: PLL input clock frequency in Hz 2089 * @freq_out: requested PLL output clock frequency in Hz 2090 * 2091 * Configures and enables PLL to generate output clock based on input clock. 2092 */ 2093 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source, 2094 unsigned int freq_in, unsigned int freq_out) 2095 { 2096 if (codec->driver->set_pll) 2097 return codec->driver->set_pll(codec, pll_id, source, 2098 freq_in, freq_out); 2099 else 2100 return -EINVAL; 2101 } 2102 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll); 2103 2104 /** 2105 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio. 2106 * @dai: DAI 2107 * @ratio Ratio of BCLK to Sample rate. 2108 * 2109 * Configures the DAI for a preset BCLK to sample rate ratio. 2110 */ 2111 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio) 2112 { 2113 if (dai->driver && dai->driver->ops->set_bclk_ratio) 2114 return dai->driver->ops->set_bclk_ratio(dai, ratio); 2115 else 2116 return -EINVAL; 2117 } 2118 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio); 2119 2120 /** 2121 * snd_soc_dai_set_fmt - configure DAI hardware audio format. 2122 * @dai: DAI 2123 * @fmt: SND_SOC_DAIFMT_ format value. 2124 * 2125 * Configures the DAI hardware format and clocking. 2126 */ 2127 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 2128 { 2129 if (dai->driver == NULL) 2130 return -EINVAL; 2131 if (dai->driver->ops->set_fmt == NULL) 2132 return -ENOTSUPP; 2133 return dai->driver->ops->set_fmt(dai, fmt); 2134 } 2135 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); 2136 2137 /** 2138 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask. 2139 * @slots: Number of slots in use. 2140 * @tx_mask: bitmask representing active TX slots. 2141 * @rx_mask: bitmask representing active RX slots. 2142 * 2143 * Generates the TDM tx and rx slot default masks for DAI. 2144 */ 2145 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots, 2146 unsigned int *tx_mask, 2147 unsigned int *rx_mask) 2148 { 2149 if (*tx_mask || *rx_mask) 2150 return 0; 2151 2152 if (!slots) 2153 return -EINVAL; 2154 2155 *tx_mask = (1 << slots) - 1; 2156 *rx_mask = (1 << slots) - 1; 2157 2158 return 0; 2159 } 2160 2161 /** 2162 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation 2163 * @dai: The DAI to configure 2164 * @tx_mask: bitmask representing active TX slots. 2165 * @rx_mask: bitmask representing active RX slots. 2166 * @slots: Number of slots in use. 2167 * @slot_width: Width in bits for each slot. 2168 * 2169 * This function configures the specified DAI for TDM operation. @slot contains 2170 * the total number of slots of the TDM stream and @slot_with the width of each 2171 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the 2172 * active slots of the TDM stream for the specified DAI, i.e. which slots the 2173 * DAI should write to or read from. If a bit is set the corresponding slot is 2174 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to 2175 * the first slot, bit 1 to the second slot and so on. The first active slot 2176 * maps to the first channel of the DAI, the second active slot to the second 2177 * channel and so on. 2178 * 2179 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask, 2180 * @rx_mask and @slot_width will be ignored. 2181 * 2182 * Returns 0 on success, a negative error code otherwise. 2183 */ 2184 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, 2185 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) 2186 { 2187 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask) 2188 dai->driver->ops->xlate_tdm_slot_mask(slots, 2189 &tx_mask, &rx_mask); 2190 else 2191 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask); 2192 2193 dai->tx_mask = tx_mask; 2194 dai->rx_mask = rx_mask; 2195 2196 if (dai->driver && dai->driver->ops->set_tdm_slot) 2197 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask, 2198 slots, slot_width); 2199 else 2200 return -ENOTSUPP; 2201 } 2202 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); 2203 2204 /** 2205 * snd_soc_dai_set_channel_map - configure DAI audio channel map 2206 * @dai: DAI 2207 * @tx_num: how many TX channels 2208 * @tx_slot: pointer to an array which imply the TX slot number channel 2209 * 0~num-1 uses 2210 * @rx_num: how many RX channels 2211 * @rx_slot: pointer to an array which imply the RX slot number channel 2212 * 0~num-1 uses 2213 * 2214 * configure the relationship between channel number and TDM slot number. 2215 */ 2216 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai, 2217 unsigned int tx_num, unsigned int *tx_slot, 2218 unsigned int rx_num, unsigned int *rx_slot) 2219 { 2220 if (dai->driver && dai->driver->ops->set_channel_map) 2221 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot, 2222 rx_num, rx_slot); 2223 else 2224 return -EINVAL; 2225 } 2226 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map); 2227 2228 /** 2229 * snd_soc_dai_set_tristate - configure DAI system or master clock. 2230 * @dai: DAI 2231 * @tristate: tristate enable 2232 * 2233 * Tristates the DAI so that others can use it. 2234 */ 2235 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) 2236 { 2237 if (dai->driver && dai->driver->ops->set_tristate) 2238 return dai->driver->ops->set_tristate(dai, tristate); 2239 else 2240 return -EINVAL; 2241 } 2242 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); 2243 2244 /** 2245 * snd_soc_dai_digital_mute - configure DAI system or master clock. 2246 * @dai: DAI 2247 * @mute: mute enable 2248 * @direction: stream to mute 2249 * 2250 * Mutes the DAI DAC. 2251 */ 2252 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute, 2253 int direction) 2254 { 2255 if (!dai->driver) 2256 return -ENOTSUPP; 2257 2258 if (dai->driver->ops->mute_stream) 2259 return dai->driver->ops->mute_stream(dai, mute, direction); 2260 else if (direction == SNDRV_PCM_STREAM_PLAYBACK && 2261 dai->driver->ops->digital_mute) 2262 return dai->driver->ops->digital_mute(dai, mute); 2263 else 2264 return -ENOTSUPP; 2265 } 2266 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); 2267 2268 static int snd_soc_init_multicodec(struct snd_soc_card *card, 2269 struct snd_soc_dai_link *dai_link) 2270 { 2271 /* Legacy codec/codec_dai link is a single entry in multicodec */ 2272 if (dai_link->codec_name || dai_link->codec_of_node || 2273 dai_link->codec_dai_name) { 2274 dai_link->num_codecs = 1; 2275 2276 dai_link->codecs = devm_kzalloc(card->dev, 2277 sizeof(struct snd_soc_dai_link_component), 2278 GFP_KERNEL); 2279 if (!dai_link->codecs) 2280 return -ENOMEM; 2281 2282 dai_link->codecs[0].name = dai_link->codec_name; 2283 dai_link->codecs[0].of_node = dai_link->codec_of_node; 2284 dai_link->codecs[0].dai_name = dai_link->codec_dai_name; 2285 } 2286 2287 if (!dai_link->codecs) { 2288 dev_err(card->dev, "ASoC: DAI link has no CODECs\n"); 2289 return -EINVAL; 2290 } 2291 2292 return 0; 2293 } 2294 2295 /** 2296 * snd_soc_register_card - Register a card with the ASoC core 2297 * 2298 * @card: Card to register 2299 * 2300 */ 2301 int snd_soc_register_card(struct snd_soc_card *card) 2302 { 2303 int i, j, ret; 2304 2305 if (!card->name || !card->dev) 2306 return -EINVAL; 2307 2308 for (i = 0; i < card->num_links; i++) { 2309 struct snd_soc_dai_link *link = &card->dai_link[i]; 2310 2311 ret = snd_soc_init_multicodec(card, link); 2312 if (ret) { 2313 dev_err(card->dev, "ASoC: failed to init multicodec\n"); 2314 return ret; 2315 } 2316 2317 for (j = 0; j < link->num_codecs; j++) { 2318 /* 2319 * Codec must be specified by 1 of name or OF node, 2320 * not both or neither. 2321 */ 2322 if (!!link->codecs[j].name == 2323 !!link->codecs[j].of_node) { 2324 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n", 2325 link->name); 2326 return -EINVAL; 2327 } 2328 /* Codec DAI name must be specified */ 2329 if (!link->codecs[j].dai_name) { 2330 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n", 2331 link->name); 2332 return -EINVAL; 2333 } 2334 } 2335 2336 /* 2337 * Platform may be specified by either name or OF node, but 2338 * can be left unspecified, and a dummy platform will be used. 2339 */ 2340 if (link->platform_name && link->platform_of_node) { 2341 dev_err(card->dev, 2342 "ASoC: Both platform name/of_node are set for %s\n", 2343 link->name); 2344 return -EINVAL; 2345 } 2346 2347 /* 2348 * CPU device may be specified by either name or OF node, but 2349 * can be left unspecified, and will be matched based on DAI 2350 * name alone.. 2351 */ 2352 if (link->cpu_name && link->cpu_of_node) { 2353 dev_err(card->dev, 2354 "ASoC: Neither/both cpu name/of_node are set for %s\n", 2355 link->name); 2356 return -EINVAL; 2357 } 2358 /* 2359 * At least one of CPU DAI name or CPU device name/node must be 2360 * specified 2361 */ 2362 if (!link->cpu_dai_name && 2363 !(link->cpu_name || link->cpu_of_node)) { 2364 dev_err(card->dev, 2365 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n", 2366 link->name); 2367 return -EINVAL; 2368 } 2369 } 2370 2371 dev_set_drvdata(card->dev, card); 2372 2373 snd_soc_initialize_card_lists(card); 2374 2375 soc_init_card_debugfs(card); 2376 2377 card->rtd = devm_kzalloc(card->dev, 2378 sizeof(struct snd_soc_pcm_runtime) * 2379 (card->num_links + card->num_aux_devs), 2380 GFP_KERNEL); 2381 if (card->rtd == NULL) 2382 return -ENOMEM; 2383 card->num_rtd = 0; 2384 card->rtd_aux = &card->rtd[card->num_links]; 2385 2386 for (i = 0; i < card->num_links; i++) { 2387 card->rtd[i].card = card; 2388 card->rtd[i].dai_link = &card->dai_link[i]; 2389 card->rtd[i].codec_dais = devm_kzalloc(card->dev, 2390 sizeof(struct snd_soc_dai *) * 2391 (card->rtd[i].dai_link->num_codecs), 2392 GFP_KERNEL); 2393 if (card->rtd[i].codec_dais == NULL) 2394 return -ENOMEM; 2395 } 2396 2397 for (i = 0; i < card->num_aux_devs; i++) 2398 card->rtd_aux[i].card = card; 2399 2400 INIT_LIST_HEAD(&card->dapm_dirty); 2401 card->instantiated = 0; 2402 mutex_init(&card->mutex); 2403 mutex_init(&card->dapm_mutex); 2404 2405 ret = snd_soc_instantiate_card(card); 2406 if (ret != 0) 2407 soc_cleanup_card_debugfs(card); 2408 2409 /* deactivate pins to sleep state */ 2410 for (i = 0; i < card->num_rtd; i++) { 2411 struct snd_soc_pcm_runtime *rtd = &card->rtd[i]; 2412 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2413 int j; 2414 2415 for (j = 0; j < rtd->num_codecs; j++) { 2416 struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; 2417 if (!codec_dai->active) 2418 pinctrl_pm_select_sleep_state(codec_dai->dev); 2419 } 2420 2421 if (!cpu_dai->active) 2422 pinctrl_pm_select_sleep_state(cpu_dai->dev); 2423 } 2424 2425 return ret; 2426 } 2427 EXPORT_SYMBOL_GPL(snd_soc_register_card); 2428 2429 /** 2430 * snd_soc_unregister_card - Unregister a card with the ASoC core 2431 * 2432 * @card: Card to unregister 2433 * 2434 */ 2435 int snd_soc_unregister_card(struct snd_soc_card *card) 2436 { 2437 if (card->instantiated) { 2438 card->instantiated = false; 2439 snd_soc_dapm_shutdown(card); 2440 soc_cleanup_card_resources(card); 2441 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name); 2442 } 2443 2444 return 0; 2445 } 2446 EXPORT_SYMBOL_GPL(snd_soc_unregister_card); 2447 2448 /* 2449 * Simplify DAI link configuration by removing ".-1" from device names 2450 * and sanitizing names. 2451 */ 2452 static char *fmt_single_name(struct device *dev, int *id) 2453 { 2454 char *found, name[NAME_SIZE]; 2455 int id1, id2; 2456 2457 if (dev_name(dev) == NULL) 2458 return NULL; 2459 2460 strlcpy(name, dev_name(dev), NAME_SIZE); 2461 2462 /* are we a "%s.%d" name (platform and SPI components) */ 2463 found = strstr(name, dev->driver->name); 2464 if (found) { 2465 /* get ID */ 2466 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) { 2467 2468 /* discard ID from name if ID == -1 */ 2469 if (*id == -1) 2470 found[strlen(dev->driver->name)] = '\0'; 2471 } 2472 2473 } else { 2474 /* I2C component devices are named "bus-addr" */ 2475 if (sscanf(name, "%x-%x", &id1, &id2) == 2) { 2476 char tmp[NAME_SIZE]; 2477 2478 /* create unique ID number from I2C addr and bus */ 2479 *id = ((id1 & 0xffff) << 16) + id2; 2480 2481 /* sanitize component name for DAI link creation */ 2482 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name); 2483 strlcpy(name, tmp, NAME_SIZE); 2484 } else 2485 *id = 0; 2486 } 2487 2488 return kstrdup(name, GFP_KERNEL); 2489 } 2490 2491 /* 2492 * Simplify DAI link naming for single devices with multiple DAIs by removing 2493 * any ".-1" and using the DAI name (instead of device name). 2494 */ 2495 static inline char *fmt_multiple_name(struct device *dev, 2496 struct snd_soc_dai_driver *dai_drv) 2497 { 2498 if (dai_drv->name == NULL) { 2499 dev_err(dev, 2500 "ASoC: error - multiple DAI %s registered with no name\n", 2501 dev_name(dev)); 2502 return NULL; 2503 } 2504 2505 return kstrdup(dai_drv->name, GFP_KERNEL); 2506 } 2507 2508 /** 2509 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core 2510 * 2511 * @component: The component for which the DAIs should be unregistered 2512 */ 2513 static void snd_soc_unregister_dais(struct snd_soc_component *component) 2514 { 2515 struct snd_soc_dai *dai, *_dai; 2516 2517 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) { 2518 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n", 2519 dai->name); 2520 list_del(&dai->list); 2521 kfree(dai->name); 2522 kfree(dai); 2523 } 2524 } 2525 2526 /** 2527 * snd_soc_register_dais - Register a DAI with the ASoC core 2528 * 2529 * @component: The component the DAIs are registered for 2530 * @dai_drv: DAI driver to use for the DAIs 2531 * @count: Number of DAIs 2532 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the 2533 * parent's name. 2534 */ 2535 static int snd_soc_register_dais(struct snd_soc_component *component, 2536 struct snd_soc_dai_driver *dai_drv, size_t count, 2537 bool legacy_dai_naming) 2538 { 2539 struct device *dev = component->dev; 2540 struct snd_soc_dai *dai; 2541 unsigned int i; 2542 int ret; 2543 2544 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count); 2545 2546 component->dai_drv = dai_drv; 2547 component->num_dai = count; 2548 2549 for (i = 0; i < count; i++) { 2550 2551 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL); 2552 if (dai == NULL) { 2553 ret = -ENOMEM; 2554 goto err; 2555 } 2556 2557 /* 2558 * Back in the old days when we still had component-less DAIs, 2559 * instead of having a static name, component-less DAIs would 2560 * inherit the name of the parent device so it is possible to 2561 * register multiple instances of the DAI. We still need to keep 2562 * the same naming style even though those DAIs are not 2563 * component-less anymore. 2564 */ 2565 if (count == 1 && legacy_dai_naming) { 2566 dai->name = fmt_single_name(dev, &dai->id); 2567 } else { 2568 dai->name = fmt_multiple_name(dev, &dai_drv[i]); 2569 if (dai_drv[i].id) 2570 dai->id = dai_drv[i].id; 2571 else 2572 dai->id = i; 2573 } 2574 if (dai->name == NULL) { 2575 kfree(dai); 2576 ret = -ENOMEM; 2577 goto err; 2578 } 2579 2580 dai->component = component; 2581 dai->dev = dev; 2582 dai->driver = &dai_drv[i]; 2583 if (!dai->driver->ops) 2584 dai->driver->ops = &null_dai_ops; 2585 2586 list_add(&dai->list, &component->dai_list); 2587 2588 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name); 2589 } 2590 2591 return 0; 2592 2593 err: 2594 snd_soc_unregister_dais(component); 2595 2596 return ret; 2597 } 2598 2599 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, 2600 enum snd_soc_dapm_type type, int subseq) 2601 { 2602 struct snd_soc_component *component = dapm->component; 2603 2604 component->driver->seq_notifier(component, type, subseq); 2605 } 2606 2607 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm, 2608 int event) 2609 { 2610 struct snd_soc_component *component = dapm->component; 2611 2612 return component->driver->stream_event(component, event); 2613 } 2614 2615 static int snd_soc_component_initialize(struct snd_soc_component *component, 2616 const struct snd_soc_component_driver *driver, struct device *dev) 2617 { 2618 struct snd_soc_dapm_context *dapm; 2619 2620 component->name = fmt_single_name(dev, &component->id); 2621 if (!component->name) { 2622 dev_err(dev, "ASoC: Failed to allocate name\n"); 2623 return -ENOMEM; 2624 } 2625 2626 component->dev = dev; 2627 component->driver = driver; 2628 component->probe = component->driver->probe; 2629 component->remove = component->driver->remove; 2630 2631 if (!component->dapm_ptr) 2632 component->dapm_ptr = &component->dapm; 2633 2634 dapm = component->dapm_ptr; 2635 dapm->dev = dev; 2636 dapm->component = component; 2637 dapm->bias_level = SND_SOC_BIAS_OFF; 2638 dapm->idle_bias_off = true; 2639 if (driver->seq_notifier) 2640 dapm->seq_notifier = snd_soc_component_seq_notifier; 2641 if (driver->stream_event) 2642 dapm->stream_event = snd_soc_component_stream_event; 2643 2644 component->controls = driver->controls; 2645 component->num_controls = driver->num_controls; 2646 component->dapm_widgets = driver->dapm_widgets; 2647 component->num_dapm_widgets = driver->num_dapm_widgets; 2648 component->dapm_routes = driver->dapm_routes; 2649 component->num_dapm_routes = driver->num_dapm_routes; 2650 2651 INIT_LIST_HEAD(&component->dai_list); 2652 mutex_init(&component->io_mutex); 2653 2654 return 0; 2655 } 2656 2657 static void snd_soc_component_setup_regmap(struct snd_soc_component *component) 2658 { 2659 int val_bytes = regmap_get_val_bytes(component->regmap); 2660 2661 /* Errors are legitimate for non-integer byte multiples */ 2662 if (val_bytes > 0) 2663 component->val_bytes = val_bytes; 2664 } 2665 2666 #ifdef CONFIG_REGMAP 2667 2668 /** 2669 * snd_soc_component_init_regmap() - Initialize regmap instance for the component 2670 * @component: The component for which to initialize the regmap instance 2671 * @regmap: The regmap instance that should be used by the component 2672 * 2673 * This function allows deferred assignment of the regmap instance that is 2674 * associated with the component. Only use this if the regmap instance is not 2675 * yet ready when the component is registered. The function must also be called 2676 * before the first IO attempt of the component. 2677 */ 2678 void snd_soc_component_init_regmap(struct snd_soc_component *component, 2679 struct regmap *regmap) 2680 { 2681 component->regmap = regmap; 2682 snd_soc_component_setup_regmap(component); 2683 } 2684 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap); 2685 2686 /** 2687 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component 2688 * @component: The component for which to de-initialize the regmap instance 2689 * 2690 * Calls regmap_exit() on the regmap instance associated to the component and 2691 * removes the regmap instance from the component. 2692 * 2693 * This function should only be used if snd_soc_component_init_regmap() was used 2694 * to initialize the regmap instance. 2695 */ 2696 void snd_soc_component_exit_regmap(struct snd_soc_component *component) 2697 { 2698 regmap_exit(component->regmap); 2699 component->regmap = NULL; 2700 } 2701 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap); 2702 2703 #endif 2704 2705 static void snd_soc_component_add_unlocked(struct snd_soc_component *component) 2706 { 2707 if (!component->write && !component->read) { 2708 if (!component->regmap) 2709 component->regmap = dev_get_regmap(component->dev, NULL); 2710 if (component->regmap) 2711 snd_soc_component_setup_regmap(component); 2712 } 2713 2714 list_add(&component->list, &component_list); 2715 } 2716 2717 static void snd_soc_component_add(struct snd_soc_component *component) 2718 { 2719 mutex_lock(&client_mutex); 2720 snd_soc_component_add_unlocked(component); 2721 mutex_unlock(&client_mutex); 2722 } 2723 2724 static void snd_soc_component_cleanup(struct snd_soc_component *component) 2725 { 2726 snd_soc_unregister_dais(component); 2727 kfree(component->name); 2728 } 2729 2730 static void snd_soc_component_del_unlocked(struct snd_soc_component *component) 2731 { 2732 list_del(&component->list); 2733 } 2734 2735 int snd_soc_register_component(struct device *dev, 2736 const struct snd_soc_component_driver *cmpnt_drv, 2737 struct snd_soc_dai_driver *dai_drv, 2738 int num_dai) 2739 { 2740 struct snd_soc_component *cmpnt; 2741 int ret; 2742 2743 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL); 2744 if (!cmpnt) { 2745 dev_err(dev, "ASoC: Failed to allocate memory\n"); 2746 return -ENOMEM; 2747 } 2748 2749 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev); 2750 if (ret) 2751 goto err_free; 2752 2753 cmpnt->ignore_pmdown_time = true; 2754 cmpnt->registered_as_component = true; 2755 2756 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true); 2757 if (ret < 0) { 2758 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret); 2759 goto err_cleanup; 2760 } 2761 2762 snd_soc_component_add(cmpnt); 2763 2764 return 0; 2765 2766 err_cleanup: 2767 snd_soc_component_cleanup(cmpnt); 2768 err_free: 2769 kfree(cmpnt); 2770 return ret; 2771 } 2772 EXPORT_SYMBOL_GPL(snd_soc_register_component); 2773 2774 /** 2775 * snd_soc_unregister_component - Unregister a component from the ASoC core 2776 * 2777 */ 2778 void snd_soc_unregister_component(struct device *dev) 2779 { 2780 struct snd_soc_component *cmpnt; 2781 2782 mutex_lock(&client_mutex); 2783 list_for_each_entry(cmpnt, &component_list, list) { 2784 if (dev == cmpnt->dev && cmpnt->registered_as_component) 2785 goto found; 2786 } 2787 mutex_unlock(&client_mutex); 2788 return; 2789 2790 found: 2791 snd_soc_component_del_unlocked(cmpnt); 2792 mutex_unlock(&client_mutex); 2793 snd_soc_component_cleanup(cmpnt); 2794 kfree(cmpnt); 2795 } 2796 EXPORT_SYMBOL_GPL(snd_soc_unregister_component); 2797 2798 static int snd_soc_platform_drv_probe(struct snd_soc_component *component) 2799 { 2800 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2801 2802 return platform->driver->probe(platform); 2803 } 2804 2805 static void snd_soc_platform_drv_remove(struct snd_soc_component *component) 2806 { 2807 struct snd_soc_platform *platform = snd_soc_component_to_platform(component); 2808 2809 platform->driver->remove(platform); 2810 } 2811 2812 /** 2813 * snd_soc_add_platform - Add a platform to the ASoC core 2814 * @dev: The parent device for the platform 2815 * @platform: The platform to add 2816 * @platform_driver: The driver for the platform 2817 */ 2818 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform, 2819 const struct snd_soc_platform_driver *platform_drv) 2820 { 2821 int ret; 2822 2823 ret = snd_soc_component_initialize(&platform->component, 2824 &platform_drv->component_driver, dev); 2825 if (ret) 2826 return ret; 2827 2828 platform->dev = dev; 2829 platform->driver = platform_drv; 2830 2831 if (platform_drv->probe) 2832 platform->component.probe = snd_soc_platform_drv_probe; 2833 if (platform_drv->remove) 2834 platform->component.remove = snd_soc_platform_drv_remove; 2835 2836 #ifdef CONFIG_DEBUG_FS 2837 platform->component.debugfs_prefix = "platform"; 2838 #endif 2839 2840 mutex_lock(&client_mutex); 2841 snd_soc_component_add_unlocked(&platform->component); 2842 list_add(&platform->list, &platform_list); 2843 mutex_unlock(&client_mutex); 2844 2845 dev_dbg(dev, "ASoC: Registered platform '%s'\n", 2846 platform->component.name); 2847 2848 return 0; 2849 } 2850 EXPORT_SYMBOL_GPL(snd_soc_add_platform); 2851 2852 /** 2853 * snd_soc_register_platform - Register a platform with the ASoC core 2854 * 2855 * @platform: platform to register 2856 */ 2857 int snd_soc_register_platform(struct device *dev, 2858 const struct snd_soc_platform_driver *platform_drv) 2859 { 2860 struct snd_soc_platform *platform; 2861 int ret; 2862 2863 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev)); 2864 2865 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL); 2866 if (platform == NULL) 2867 return -ENOMEM; 2868 2869 ret = snd_soc_add_platform(dev, platform, platform_drv); 2870 if (ret) 2871 kfree(platform); 2872 2873 return ret; 2874 } 2875 EXPORT_SYMBOL_GPL(snd_soc_register_platform); 2876 2877 /** 2878 * snd_soc_remove_platform - Remove a platform from the ASoC core 2879 * @platform: the platform to remove 2880 */ 2881 void snd_soc_remove_platform(struct snd_soc_platform *platform) 2882 { 2883 2884 mutex_lock(&client_mutex); 2885 list_del(&platform->list); 2886 snd_soc_component_del_unlocked(&platform->component); 2887 mutex_unlock(&client_mutex); 2888 2889 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n", 2890 platform->component.name); 2891 2892 snd_soc_component_cleanup(&platform->component); 2893 } 2894 EXPORT_SYMBOL_GPL(snd_soc_remove_platform); 2895 2896 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev) 2897 { 2898 struct snd_soc_platform *platform; 2899 2900 mutex_lock(&client_mutex); 2901 list_for_each_entry(platform, &platform_list, list) { 2902 if (dev == platform->dev) { 2903 mutex_unlock(&client_mutex); 2904 return platform; 2905 } 2906 } 2907 mutex_unlock(&client_mutex); 2908 2909 return NULL; 2910 } 2911 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform); 2912 2913 /** 2914 * snd_soc_unregister_platform - Unregister a platform from the ASoC core 2915 * 2916 * @platform: platform to unregister 2917 */ 2918 void snd_soc_unregister_platform(struct device *dev) 2919 { 2920 struct snd_soc_platform *platform; 2921 2922 platform = snd_soc_lookup_platform(dev); 2923 if (!platform) 2924 return; 2925 2926 snd_soc_remove_platform(platform); 2927 kfree(platform); 2928 } 2929 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform); 2930 2931 static u64 codec_format_map[] = { 2932 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE, 2933 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE, 2934 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE, 2935 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE, 2936 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, 2937 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE, 2938 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2939 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, 2940 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE, 2941 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE, 2942 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE, 2943 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE, 2944 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE, 2945 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE, 2946 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 2947 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE, 2948 }; 2949 2950 /* Fix up the DAI formats for endianness: codecs don't actually see 2951 * the endianness of the data but we're using the CPU format 2952 * definitions which do need to include endianness so we ensure that 2953 * codec DAIs always have both big and little endian variants set. 2954 */ 2955 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream) 2956 { 2957 int i; 2958 2959 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++) 2960 if (stream->formats & codec_format_map[i]) 2961 stream->formats |= codec_format_map[i]; 2962 } 2963 2964 static int snd_soc_codec_drv_probe(struct snd_soc_component *component) 2965 { 2966 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2967 2968 return codec->driver->probe(codec); 2969 } 2970 2971 static void snd_soc_codec_drv_remove(struct snd_soc_component *component) 2972 { 2973 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2974 2975 codec->driver->remove(codec); 2976 } 2977 2978 static int snd_soc_codec_drv_write(struct snd_soc_component *component, 2979 unsigned int reg, unsigned int val) 2980 { 2981 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2982 2983 return codec->driver->write(codec, reg, val); 2984 } 2985 2986 static int snd_soc_codec_drv_read(struct snd_soc_component *component, 2987 unsigned int reg, unsigned int *val) 2988 { 2989 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 2990 2991 *val = codec->driver->read(codec, reg); 2992 2993 return 0; 2994 } 2995 2996 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm, 2997 enum snd_soc_bias_level level) 2998 { 2999 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm); 3000 3001 return codec->driver->set_bias_level(codec, level); 3002 } 3003 3004 /** 3005 * snd_soc_register_codec - Register a codec with the ASoC core 3006 * 3007 * @codec: codec to register 3008 */ 3009 int snd_soc_register_codec(struct device *dev, 3010 const struct snd_soc_codec_driver *codec_drv, 3011 struct snd_soc_dai_driver *dai_drv, 3012 int num_dai) 3013 { 3014 struct snd_soc_codec *codec; 3015 struct snd_soc_dai *dai; 3016 int ret, i; 3017 3018 dev_dbg(dev, "codec register %s\n", dev_name(dev)); 3019 3020 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 3021 if (codec == NULL) 3022 return -ENOMEM; 3023 3024 codec->component.dapm_ptr = &codec->dapm; 3025 codec->component.codec = codec; 3026 3027 ret = snd_soc_component_initialize(&codec->component, 3028 &codec_drv->component_driver, dev); 3029 if (ret) 3030 goto err_free; 3031 3032 if (codec_drv->controls) { 3033 codec->component.controls = codec_drv->controls; 3034 codec->component.num_controls = codec_drv->num_controls; 3035 } 3036 if (codec_drv->dapm_widgets) { 3037 codec->component.dapm_widgets = codec_drv->dapm_widgets; 3038 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets; 3039 } 3040 if (codec_drv->dapm_routes) { 3041 codec->component.dapm_routes = codec_drv->dapm_routes; 3042 codec->component.num_dapm_routes = codec_drv->num_dapm_routes; 3043 } 3044 3045 if (codec_drv->probe) 3046 codec->component.probe = snd_soc_codec_drv_probe; 3047 if (codec_drv->remove) 3048 codec->component.remove = snd_soc_codec_drv_remove; 3049 if (codec_drv->write) 3050 codec->component.write = snd_soc_codec_drv_write; 3051 if (codec_drv->read) 3052 codec->component.read = snd_soc_codec_drv_read; 3053 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time; 3054 codec->dapm.idle_bias_off = codec_drv->idle_bias_off; 3055 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off; 3056 if (codec_drv->seq_notifier) 3057 codec->dapm.seq_notifier = codec_drv->seq_notifier; 3058 if (codec_drv->set_bias_level) 3059 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level; 3060 codec->dev = dev; 3061 codec->driver = codec_drv; 3062 codec->component.val_bytes = codec_drv->reg_word_size; 3063 3064 #ifdef CONFIG_DEBUG_FS 3065 codec->component.init_debugfs = soc_init_codec_debugfs; 3066 codec->component.debugfs_prefix = "codec"; 3067 #endif 3068 3069 if (codec_drv->get_regmap) 3070 codec->component.regmap = codec_drv->get_regmap(dev); 3071 3072 for (i = 0; i < num_dai; i++) { 3073 fixup_codec_formats(&dai_drv[i].playback); 3074 fixup_codec_formats(&dai_drv[i].capture); 3075 } 3076 3077 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false); 3078 if (ret < 0) { 3079 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret); 3080 goto err_cleanup; 3081 } 3082 3083 list_for_each_entry(dai, &codec->component.dai_list, list) 3084 dai->codec = codec; 3085 3086 mutex_lock(&client_mutex); 3087 snd_soc_component_add_unlocked(&codec->component); 3088 list_add(&codec->list, &codec_list); 3089 mutex_unlock(&client_mutex); 3090 3091 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", 3092 codec->component.name); 3093 return 0; 3094 3095 err_cleanup: 3096 snd_soc_component_cleanup(&codec->component); 3097 err_free: 3098 kfree(codec); 3099 return ret; 3100 } 3101 EXPORT_SYMBOL_GPL(snd_soc_register_codec); 3102 3103 /** 3104 * snd_soc_unregister_codec - Unregister a codec from the ASoC core 3105 * 3106 * @codec: codec to unregister 3107 */ 3108 void snd_soc_unregister_codec(struct device *dev) 3109 { 3110 struct snd_soc_codec *codec; 3111 3112 mutex_lock(&client_mutex); 3113 list_for_each_entry(codec, &codec_list, list) { 3114 if (dev == codec->dev) 3115 goto found; 3116 } 3117 mutex_unlock(&client_mutex); 3118 return; 3119 3120 found: 3121 list_del(&codec->list); 3122 snd_soc_component_del_unlocked(&codec->component); 3123 mutex_unlock(&client_mutex); 3124 3125 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", 3126 codec->component.name); 3127 3128 snd_soc_component_cleanup(&codec->component); 3129 snd_soc_cache_exit(codec); 3130 kfree(codec); 3131 } 3132 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); 3133 3134 /* Retrieve a card's name from device tree */ 3135 int snd_soc_of_parse_card_name(struct snd_soc_card *card, 3136 const char *propname) 3137 { 3138 struct device_node *np; 3139 int ret; 3140 3141 if (!card->dev) { 3142 pr_err("card->dev is not set before calling %s\n", __func__); 3143 return -EINVAL; 3144 } 3145 3146 np = card->dev->of_node; 3147 3148 ret = of_property_read_string_index(np, propname, 0, &card->name); 3149 /* 3150 * EINVAL means the property does not exist. This is fine providing 3151 * card->name was previously set, which is checked later in 3152 * snd_soc_register_card. 3153 */ 3154 if (ret < 0 && ret != -EINVAL) { 3155 dev_err(card->dev, 3156 "ASoC: Property '%s' could not be read: %d\n", 3157 propname, ret); 3158 return ret; 3159 } 3160 3161 return 0; 3162 } 3163 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name); 3164 3165 static const struct snd_soc_dapm_widget simple_widgets[] = { 3166 SND_SOC_DAPM_MIC("Microphone", NULL), 3167 SND_SOC_DAPM_LINE("Line", NULL), 3168 SND_SOC_DAPM_HP("Headphone", NULL), 3169 SND_SOC_DAPM_SPK("Speaker", NULL), 3170 }; 3171 3172 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card, 3173 const char *propname) 3174 { 3175 struct device_node *np = card->dev->of_node; 3176 struct snd_soc_dapm_widget *widgets; 3177 const char *template, *wname; 3178 int i, j, num_widgets, ret; 3179 3180 num_widgets = of_property_count_strings(np, propname); 3181 if (num_widgets < 0) { 3182 dev_err(card->dev, 3183 "ASoC: Property '%s' does not exist\n", propname); 3184 return -EINVAL; 3185 } 3186 if (num_widgets & 1) { 3187 dev_err(card->dev, 3188 "ASoC: Property '%s' length is not even\n", propname); 3189 return -EINVAL; 3190 } 3191 3192 num_widgets /= 2; 3193 if (!num_widgets) { 3194 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3195 propname); 3196 return -EINVAL; 3197 } 3198 3199 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets), 3200 GFP_KERNEL); 3201 if (!widgets) { 3202 dev_err(card->dev, 3203 "ASoC: Could not allocate memory for widgets\n"); 3204 return -ENOMEM; 3205 } 3206 3207 for (i = 0; i < num_widgets; i++) { 3208 ret = of_property_read_string_index(np, propname, 3209 2 * i, &template); 3210 if (ret) { 3211 dev_err(card->dev, 3212 "ASoC: Property '%s' index %d read error:%d\n", 3213 propname, 2 * i, ret); 3214 return -EINVAL; 3215 } 3216 3217 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) { 3218 if (!strncmp(template, simple_widgets[j].name, 3219 strlen(simple_widgets[j].name))) { 3220 widgets[i] = simple_widgets[j]; 3221 break; 3222 } 3223 } 3224 3225 if (j >= ARRAY_SIZE(simple_widgets)) { 3226 dev_err(card->dev, 3227 "ASoC: DAPM widget '%s' is not supported\n", 3228 template); 3229 return -EINVAL; 3230 } 3231 3232 ret = of_property_read_string_index(np, propname, 3233 (2 * i) + 1, 3234 &wname); 3235 if (ret) { 3236 dev_err(card->dev, 3237 "ASoC: Property '%s' index %d read error:%d\n", 3238 propname, (2 * i) + 1, ret); 3239 return -EINVAL; 3240 } 3241 3242 widgets[i].name = wname; 3243 } 3244 3245 card->dapm_widgets = widgets; 3246 card->num_dapm_widgets = num_widgets; 3247 3248 return 0; 3249 } 3250 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets); 3251 3252 int snd_soc_of_parse_tdm_slot(struct device_node *np, 3253 unsigned int *slots, 3254 unsigned int *slot_width) 3255 { 3256 u32 val; 3257 int ret; 3258 3259 if (of_property_read_bool(np, "dai-tdm-slot-num")) { 3260 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val); 3261 if (ret) 3262 return ret; 3263 3264 if (slots) 3265 *slots = val; 3266 } 3267 3268 if (of_property_read_bool(np, "dai-tdm-slot-width")) { 3269 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val); 3270 if (ret) 3271 return ret; 3272 3273 if (slot_width) 3274 *slot_width = val; 3275 } 3276 3277 return 0; 3278 } 3279 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot); 3280 3281 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card, 3282 const char *propname) 3283 { 3284 struct device_node *np = card->dev->of_node; 3285 int num_routes; 3286 struct snd_soc_dapm_route *routes; 3287 int i, ret; 3288 3289 num_routes = of_property_count_strings(np, propname); 3290 if (num_routes < 0 || num_routes & 1) { 3291 dev_err(card->dev, 3292 "ASoC: Property '%s' does not exist or its length is not even\n", 3293 propname); 3294 return -EINVAL; 3295 } 3296 num_routes /= 2; 3297 if (!num_routes) { 3298 dev_err(card->dev, "ASoC: Property '%s's length is zero\n", 3299 propname); 3300 return -EINVAL; 3301 } 3302 3303 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes), 3304 GFP_KERNEL); 3305 if (!routes) { 3306 dev_err(card->dev, 3307 "ASoC: Could not allocate DAPM route table\n"); 3308 return -EINVAL; 3309 } 3310 3311 for (i = 0; i < num_routes; i++) { 3312 ret = of_property_read_string_index(np, propname, 3313 2 * i, &routes[i].sink); 3314 if (ret) { 3315 dev_err(card->dev, 3316 "ASoC: Property '%s' index %d could not be read: %d\n", 3317 propname, 2 * i, ret); 3318 return -EINVAL; 3319 } 3320 ret = of_property_read_string_index(np, propname, 3321 (2 * i) + 1, &routes[i].source); 3322 if (ret) { 3323 dev_err(card->dev, 3324 "ASoC: Property '%s' index %d could not be read: %d\n", 3325 propname, (2 * i) + 1, ret); 3326 return -EINVAL; 3327 } 3328 } 3329 3330 card->num_dapm_routes = num_routes; 3331 card->dapm_routes = routes; 3332 3333 return 0; 3334 } 3335 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing); 3336 3337 unsigned int snd_soc_of_parse_daifmt(struct device_node *np, 3338 const char *prefix, 3339 struct device_node **bitclkmaster, 3340 struct device_node **framemaster) 3341 { 3342 int ret, i; 3343 char prop[128]; 3344 unsigned int format = 0; 3345 int bit, frame; 3346 const char *str; 3347 struct { 3348 char *name; 3349 unsigned int val; 3350 } of_fmt_table[] = { 3351 { "i2s", SND_SOC_DAIFMT_I2S }, 3352 { "right_j", SND_SOC_DAIFMT_RIGHT_J }, 3353 { "left_j", SND_SOC_DAIFMT_LEFT_J }, 3354 { "dsp_a", SND_SOC_DAIFMT_DSP_A }, 3355 { "dsp_b", SND_SOC_DAIFMT_DSP_B }, 3356 { "ac97", SND_SOC_DAIFMT_AC97 }, 3357 { "pdm", SND_SOC_DAIFMT_PDM}, 3358 { "msb", SND_SOC_DAIFMT_MSB }, 3359 { "lsb", SND_SOC_DAIFMT_LSB }, 3360 }; 3361 3362 if (!prefix) 3363 prefix = ""; 3364 3365 /* 3366 * check "[prefix]format = xxx" 3367 * SND_SOC_DAIFMT_FORMAT_MASK area 3368 */ 3369 snprintf(prop, sizeof(prop), "%sformat", prefix); 3370 ret = of_property_read_string(np, prop, &str); 3371 if (ret == 0) { 3372 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) { 3373 if (strcmp(str, of_fmt_table[i].name) == 0) { 3374 format |= of_fmt_table[i].val; 3375 break; 3376 } 3377 } 3378 } 3379 3380 /* 3381 * check "[prefix]continuous-clock" 3382 * SND_SOC_DAIFMT_CLOCK_MASK area 3383 */ 3384 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix); 3385 if (of_get_property(np, prop, NULL)) 3386 format |= SND_SOC_DAIFMT_CONT; 3387 else 3388 format |= SND_SOC_DAIFMT_GATED; 3389 3390 /* 3391 * check "[prefix]bitclock-inversion" 3392 * check "[prefix]frame-inversion" 3393 * SND_SOC_DAIFMT_INV_MASK area 3394 */ 3395 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix); 3396 bit = !!of_get_property(np, prop, NULL); 3397 3398 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix); 3399 frame = !!of_get_property(np, prop, NULL); 3400 3401 switch ((bit << 4) + frame) { 3402 case 0x11: 3403 format |= SND_SOC_DAIFMT_IB_IF; 3404 break; 3405 case 0x10: 3406 format |= SND_SOC_DAIFMT_IB_NF; 3407 break; 3408 case 0x01: 3409 format |= SND_SOC_DAIFMT_NB_IF; 3410 break; 3411 default: 3412 /* SND_SOC_DAIFMT_NB_NF is default */ 3413 break; 3414 } 3415 3416 /* 3417 * check "[prefix]bitclock-master" 3418 * check "[prefix]frame-master" 3419 * SND_SOC_DAIFMT_MASTER_MASK area 3420 */ 3421 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix); 3422 bit = !!of_get_property(np, prop, NULL); 3423 if (bit && bitclkmaster) 3424 *bitclkmaster = of_parse_phandle(np, prop, 0); 3425 3426 snprintf(prop, sizeof(prop), "%sframe-master", prefix); 3427 frame = !!of_get_property(np, prop, NULL); 3428 if (frame && framemaster) 3429 *framemaster = of_parse_phandle(np, prop, 0); 3430 3431 switch ((bit << 4) + frame) { 3432 case 0x11: 3433 format |= SND_SOC_DAIFMT_CBM_CFM; 3434 break; 3435 case 0x10: 3436 format |= SND_SOC_DAIFMT_CBM_CFS; 3437 break; 3438 case 0x01: 3439 format |= SND_SOC_DAIFMT_CBS_CFM; 3440 break; 3441 default: 3442 format |= SND_SOC_DAIFMT_CBS_CFS; 3443 break; 3444 } 3445 3446 return format; 3447 } 3448 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt); 3449 3450 static int snd_soc_get_dai_name(struct of_phandle_args *args, 3451 const char **dai_name) 3452 { 3453 struct snd_soc_component *pos; 3454 int ret = -EPROBE_DEFER; 3455 3456 mutex_lock(&client_mutex); 3457 list_for_each_entry(pos, &component_list, list) { 3458 if (pos->dev->of_node != args->np) 3459 continue; 3460 3461 if (pos->driver->of_xlate_dai_name) { 3462 ret = pos->driver->of_xlate_dai_name(pos, 3463 args, 3464 dai_name); 3465 } else { 3466 int id = -1; 3467 3468 switch (args->args_count) { 3469 case 0: 3470 id = 0; /* same as dai_drv[0] */ 3471 break; 3472 case 1: 3473 id = args->args[0]; 3474 break; 3475 default: 3476 /* not supported */ 3477 break; 3478 } 3479 3480 if (id < 0 || id >= pos->num_dai) { 3481 ret = -EINVAL; 3482 continue; 3483 } 3484 3485 ret = 0; 3486 3487 *dai_name = pos->dai_drv[id].name; 3488 if (!*dai_name) 3489 *dai_name = pos->name; 3490 } 3491 3492 break; 3493 } 3494 mutex_unlock(&client_mutex); 3495 return ret; 3496 } 3497 3498 int snd_soc_of_get_dai_name(struct device_node *of_node, 3499 const char **dai_name) 3500 { 3501 struct of_phandle_args args; 3502 int ret; 3503 3504 ret = of_parse_phandle_with_args(of_node, "sound-dai", 3505 "#sound-dai-cells", 0, &args); 3506 if (ret) 3507 return ret; 3508 3509 ret = snd_soc_get_dai_name(&args, dai_name); 3510 3511 of_node_put(args.np); 3512 3513 return ret; 3514 } 3515 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name); 3516 3517 /* 3518 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree 3519 * @dev: Card device 3520 * @of_node: Device node 3521 * @dai_link: DAI link 3522 * 3523 * Builds an array of CODEC DAI components from the DAI link property 3524 * 'sound-dai'. 3525 * The array is set in the DAI link and the number of DAIs is set accordingly. 3526 * The device nodes in the array (of_node) must be dereferenced by the caller. 3527 * 3528 * Returns 0 for success 3529 */ 3530 int snd_soc_of_get_dai_link_codecs(struct device *dev, 3531 struct device_node *of_node, 3532 struct snd_soc_dai_link *dai_link) 3533 { 3534 struct of_phandle_args args; 3535 struct snd_soc_dai_link_component *component; 3536 char *name; 3537 int index, num_codecs, ret; 3538 3539 /* Count the number of CODECs */ 3540 name = "sound-dai"; 3541 num_codecs = of_count_phandle_with_args(of_node, name, 3542 "#sound-dai-cells"); 3543 if (num_codecs <= 0) { 3544 if (num_codecs == -ENOENT) 3545 dev_err(dev, "No 'sound-dai' property\n"); 3546 else 3547 dev_err(dev, "Bad phandle in 'sound-dai'\n"); 3548 return num_codecs; 3549 } 3550 component = devm_kzalloc(dev, 3551 sizeof *component * num_codecs, 3552 GFP_KERNEL); 3553 if (!component) 3554 return -ENOMEM; 3555 dai_link->codecs = component; 3556 dai_link->num_codecs = num_codecs; 3557 3558 /* Parse the list */ 3559 for (index = 0, component = dai_link->codecs; 3560 index < dai_link->num_codecs; 3561 index++, component++) { 3562 ret = of_parse_phandle_with_args(of_node, name, 3563 "#sound-dai-cells", 3564 index, &args); 3565 if (ret) 3566 goto err; 3567 component->of_node = args.np; 3568 ret = snd_soc_get_dai_name(&args, &component->dai_name); 3569 if (ret < 0) 3570 goto err; 3571 } 3572 return 0; 3573 err: 3574 for (index = 0, component = dai_link->codecs; 3575 index < dai_link->num_codecs; 3576 index++, component++) { 3577 if (!component->of_node) 3578 break; 3579 of_node_put(component->of_node); 3580 component->of_node = NULL; 3581 } 3582 dai_link->codecs = NULL; 3583 dai_link->num_codecs = 0; 3584 return ret; 3585 } 3586 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs); 3587 3588 static int __init snd_soc_init(void) 3589 { 3590 #ifdef CONFIG_DEBUG_FS 3591 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); 3592 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) { 3593 pr_warn("ASoC: Failed to create debugfs directory\n"); 3594 snd_soc_debugfs_root = NULL; 3595 } 3596 3597 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL, 3598 &codec_list_fops)) 3599 pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); 3600 3601 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, 3602 &dai_list_fops)) 3603 pr_warn("ASoC: Failed to create DAI list debugfs file\n"); 3604 3605 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL, 3606 &platform_list_fops)) 3607 pr_warn("ASoC: Failed to create platform list debugfs file\n"); 3608 #endif 3609 3610 snd_soc_util_init(); 3611 3612 return platform_driver_register(&soc_driver); 3613 } 3614 module_init(snd_soc_init); 3615 3616 static void __exit snd_soc_exit(void) 3617 { 3618 snd_soc_util_exit(); 3619 3620 #ifdef CONFIG_DEBUG_FS 3621 debugfs_remove_recursive(snd_soc_debugfs_root); 3622 #endif 3623 platform_driver_unregister(&soc_driver); 3624 } 3625 module_exit(snd_soc_exit); 3626 3627 /* Module information */ 3628 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); 3629 MODULE_DESCRIPTION("ALSA SoC Core"); 3630 MODULE_LICENSE("GPL"); 3631 MODULE_ALIAS("platform:soc-audio"); 3632