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 */
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/slab.h>
34 #include <sound/ac97_codec.h>
35 #include <sound/core.h>
36 #include <sound/jack.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include <sound/soc.h>
40 #include <sound/initval.h>
42 #define CREATE_TRACE_POINTS
43 #include <trace/events/asoc.h>
45 #define NAME_SIZE 32
47 static DEFINE_MUTEX(pcm_mutex);
48 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
50 #ifdef CONFIG_DEBUG_FS
51 static struct dentry *debugfs_root;
52 #endif
54 static DEFINE_MUTEX(client_mutex);
55 static LIST_HEAD(card_list);
56 static LIST_HEAD(dai_list);
57 static LIST_HEAD(platform_list);
58 static LIST_HEAD(codec_list);
60 static int snd_soc_register_card(struct snd_soc_card *card);
61 static int snd_soc_unregister_card(struct snd_soc_card *card);
62 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
64 /*
65 * This is a timeout to do a DAPM powerdown after a stream is closed().
66 * It can be used to eliminate pops between different playback streams, e.g.
67 * between two audio tracks.
68 */
69 static int pmdown_time = 5000;
70 module_param(pmdown_time, int, 0);
71 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
73 /* codec register dump */
74 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
75 {
76 int ret, i, step = 1, count = 0;
78 if (!codec->driver->reg_cache_size)
79 return 0;
81 if (codec->driver->reg_cache_step)
82 step = codec->driver->reg_cache_step;
84 count += sprintf(buf, "%s registers\n", codec->name);
85 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
86 if (codec->driver->readable_register && !codec->driver->readable_register(i))
87 continue;
89 count += sprintf(buf + count, "%2x: ", i);
90 if (count >= PAGE_SIZE - 1)
91 break;
93 if (codec->driver->display_register) {
94 count += codec->driver->display_register(codec, buf + count,
95 PAGE_SIZE - count, i);
96 } else {
97 /* If the read fails it's almost certainly due to
98 * the register being volatile and the device being
99 * powered off.
100 */
101 ret = snd_soc_read(codec, i);
102 if (ret >= 0)
103 count += snprintf(buf + count,
104 PAGE_SIZE - count,
105 "%4x", ret);
106 else
107 count += snprintf(buf + count,
108 PAGE_SIZE - count,
109 "<no data: %d>", ret);
110 }
112 if (count >= PAGE_SIZE - 1)
113 break;
115 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
116 if (count >= PAGE_SIZE - 1)
117 break;
118 }
120 /* Truncate count; min() would cause a warning */
121 if (count >= PAGE_SIZE)
122 count = PAGE_SIZE - 1;
124 return count;
125 }
126 static ssize_t codec_reg_show(struct device *dev,
127 struct device_attribute *attr, char *buf)
128 {
129 struct snd_soc_pcm_runtime *rtd =
130 container_of(dev, struct snd_soc_pcm_runtime, dev);
132 return soc_codec_reg_show(rtd->codec, buf);
133 }
135 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
137 static ssize_t pmdown_time_show(struct device *dev,
138 struct device_attribute *attr, char *buf)
139 {
140 struct snd_soc_pcm_runtime *rtd =
141 container_of(dev, struct snd_soc_pcm_runtime, dev);
143 return sprintf(buf, "%ld\n", rtd->pmdown_time);
144 }
146 static ssize_t pmdown_time_set(struct device *dev,
147 struct device_attribute *attr,
148 const char *buf, size_t count)
149 {
150 struct snd_soc_pcm_runtime *rtd =
151 container_of(dev, struct snd_soc_pcm_runtime, dev);
152 int ret;
154 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
155 if (ret)
156 return ret;
158 return count;
159 }
161 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
163 #ifdef CONFIG_DEBUG_FS
164 static int codec_reg_open_file(struct inode *inode, struct file *file)
165 {
166 file->private_data = inode->i_private;
167 return 0;
168 }
170 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
171 size_t count, loff_t *ppos)
172 {
173 ssize_t ret;
174 struct snd_soc_codec *codec = file->private_data;
175 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
176 if (!buf)
177 return -ENOMEM;
178 ret = soc_codec_reg_show(codec, buf);
179 if (ret >= 0)
180 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
181 kfree(buf);
182 return ret;
183 }
185 static ssize_t codec_reg_write_file(struct file *file,
186 const char __user *user_buf, size_t count, loff_t *ppos)
187 {
188 char buf[32];
189 int buf_size;
190 char *start = buf;
191 unsigned long reg, value;
192 int step = 1;
193 struct snd_soc_codec *codec = file->private_data;
195 buf_size = min(count, (sizeof(buf)-1));
196 if (copy_from_user(buf, user_buf, buf_size))
197 return -EFAULT;
198 buf[buf_size] = 0;
200 if (codec->driver->reg_cache_step)
201 step = codec->driver->reg_cache_step;
203 while (*start == ' ')
204 start++;
205 reg = simple_strtoul(start, &start, 16);
206 if ((reg >= codec->driver->reg_cache_size) || (reg % step))
207 return -EINVAL;
208 while (*start == ' ')
209 start++;
210 if (strict_strtoul(start, 16, &value))
211 return -EINVAL;
212 snd_soc_write(codec, reg, value);
213 return buf_size;
214 }
216 static const struct file_operations codec_reg_fops = {
217 .open = codec_reg_open_file,
218 .read = codec_reg_read_file,
219 .write = codec_reg_write_file,
220 .llseek = default_llseek,
221 };
223 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
224 {
225 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
227 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
228 debugfs_card_root);
229 if (!codec->debugfs_codec_root) {
230 printk(KERN_WARNING
231 "ASoC: Failed to create codec debugfs directory\n");
232 return;
233 }
235 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
236 codec->debugfs_codec_root,
237 codec, &codec_reg_fops);
238 if (!codec->debugfs_reg)
239 printk(KERN_WARNING
240 "ASoC: Failed to create codec register debugfs file\n");
242 codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
243 codec->debugfs_codec_root);
244 if (!codec->dapm.debugfs_dapm)
245 printk(KERN_WARNING
246 "Failed to create DAPM debugfs directory\n");
248 snd_soc_dapm_debugfs_init(&codec->dapm);
249 }
251 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
252 {
253 debugfs_remove_recursive(codec->debugfs_codec_root);
254 }
256 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
257 size_t count, loff_t *ppos)
258 {
259 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
260 ssize_t len, ret = 0;
261 struct snd_soc_codec *codec;
263 if (!buf)
264 return -ENOMEM;
266 list_for_each_entry(codec, &codec_list, list) {
267 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
268 codec->name);
269 if (len >= 0)
270 ret += len;
271 if (ret > PAGE_SIZE) {
272 ret = PAGE_SIZE;
273 break;
274 }
275 }
277 if (ret >= 0)
278 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
280 kfree(buf);
282 return ret;
283 }
285 static const struct file_operations codec_list_fops = {
286 .read = codec_list_read_file,
287 .llseek = default_llseek,/* read accesses f_pos */
288 };
290 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
291 size_t count, loff_t *ppos)
292 {
293 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
294 ssize_t len, ret = 0;
295 struct snd_soc_dai *dai;
297 if (!buf)
298 return -ENOMEM;
300 list_for_each_entry(dai, &dai_list, list) {
301 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
302 if (len >= 0)
303 ret += len;
304 if (ret > PAGE_SIZE) {
305 ret = PAGE_SIZE;
306 break;
307 }
308 }
310 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
312 kfree(buf);
314 return ret;
315 }
317 static const struct file_operations dai_list_fops = {
318 .read = dai_list_read_file,
319 .llseek = default_llseek,/* read accesses f_pos */
320 };
322 static ssize_t platform_list_read_file(struct file *file,
323 char __user *user_buf,
324 size_t count, loff_t *ppos)
325 {
326 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
327 ssize_t len, ret = 0;
328 struct snd_soc_platform *platform;
330 if (!buf)
331 return -ENOMEM;
333 list_for_each_entry(platform, &platform_list, list) {
334 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
335 platform->name);
336 if (len >= 0)
337 ret += len;
338 if (ret > PAGE_SIZE) {
339 ret = PAGE_SIZE;
340 break;
341 }
342 }
344 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
346 kfree(buf);
348 return ret;
349 }
351 static const struct file_operations platform_list_fops = {
352 .read = platform_list_read_file,
353 .llseek = default_llseek,/* read accesses f_pos */
354 };
356 static void soc_init_card_debugfs(struct snd_soc_card *card)
357 {
358 card->debugfs_card_root = debugfs_create_dir(card->name,
359 debugfs_root);
360 if (!card->debugfs_card_root) {
361 dev_warn(card->dev,
362 "ASoC: Failed to create codec debugfs directory\n");
363 return;
364 }
366 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
367 card->debugfs_card_root,
368 &card->pop_time);
369 if (!card->debugfs_pop_time)
370 dev_warn(card->dev,
371 "Failed to create pop time debugfs file\n");
372 }
374 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
375 {
376 debugfs_remove_recursive(card->debugfs_card_root);
377 }
379 #else
381 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
382 {
383 }
385 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
386 {
387 }
389 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
390 {
391 }
393 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
394 {
395 }
396 #endif
398 #ifdef CONFIG_SND_SOC_AC97_BUS
399 /* unregister ac97 codec */
400 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
401 {
402 if (codec->ac97->dev.bus)
403 device_unregister(&codec->ac97->dev);
404 return 0;
405 }
407 /* stop no dev release warning */
408 static void soc_ac97_device_release(struct device *dev){}
410 /* register ac97 codec to bus */
411 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
412 {
413 int err;
415 codec->ac97->dev.bus = &ac97_bus_type;
416 codec->ac97->dev.parent = codec->card->dev;
417 codec->ac97->dev.release = soc_ac97_device_release;
419 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
420 codec->card->snd_card->number, 0, codec->name);
421 err = device_register(&codec->ac97->dev);
422 if (err < 0) {
423 snd_printk(KERN_ERR "Can't register ac97 bus\n");
424 codec->ac97->dev.bus = NULL;
425 return err;
426 }
427 return 0;
428 }
429 #endif
431 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
432 {
433 struct snd_soc_pcm_runtime *rtd = substream->private_data;
434 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
435 struct snd_soc_dai *codec_dai = rtd->codec_dai;
436 int ret;
438 if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
439 rtd->dai_link->symmetric_rates) {
440 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
441 rtd->rate);
443 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
444 SNDRV_PCM_HW_PARAM_RATE,
445 rtd->rate,
446 rtd->rate);
447 if (ret < 0) {
448 dev_err(&rtd->dev,
449 "Unable to apply rate symmetry constraint: %d\n", ret);
450 return ret;
451 }
452 }
454 return 0;
455 }
457 /*
458 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
459 * then initialized and any private data can be allocated. This also calls
460 * startup for the cpu DAI, platform, machine and codec DAI.
461 */
462 static int soc_pcm_open(struct snd_pcm_substream *substream)
463 {
464 struct snd_soc_pcm_runtime *rtd = substream->private_data;
465 struct snd_pcm_runtime *runtime = substream->runtime;
466 struct snd_soc_platform *platform = rtd->platform;
467 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
468 struct snd_soc_dai *codec_dai = rtd->codec_dai;
469 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
470 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
471 int ret = 0;
473 mutex_lock(&pcm_mutex);
475 /* startup the audio subsystem */
476 if (cpu_dai->driver->ops->startup) {
477 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
478 if (ret < 0) {
479 printk(KERN_ERR "asoc: can't open interface %s\n",
480 cpu_dai->name);
481 goto out;
482 }
483 }
485 if (platform->driver->ops->open) {
486 ret = platform->driver->ops->open(substream);
487 if (ret < 0) {
488 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
489 goto platform_err;
490 }
491 }
493 if (codec_dai->driver->ops->startup) {
494 ret = codec_dai->driver->ops->startup(substream, codec_dai);
495 if (ret < 0) {
496 printk(KERN_ERR "asoc: can't open codec %s\n",
497 codec_dai->name);
498 goto codec_dai_err;
499 }
500 }
502 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
503 ret = rtd->dai_link->ops->startup(substream);
504 if (ret < 0) {
505 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
506 goto machine_err;
507 }
508 }
510 /* Check that the codec and cpu DAIs are compatible */
511 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
512 runtime->hw.rate_min =
513 max(codec_dai_drv->playback.rate_min,
514 cpu_dai_drv->playback.rate_min);
515 runtime->hw.rate_max =
516 min(codec_dai_drv->playback.rate_max,
517 cpu_dai_drv->playback.rate_max);
518 runtime->hw.channels_min =
519 max(codec_dai_drv->playback.channels_min,
520 cpu_dai_drv->playback.channels_min);
521 runtime->hw.channels_max =
522 min(codec_dai_drv->playback.channels_max,
523 cpu_dai_drv->playback.channels_max);
524 runtime->hw.formats =
525 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
526 runtime->hw.rates =
527 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
528 if (codec_dai_drv->playback.rates
529 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
530 runtime->hw.rates |= cpu_dai_drv->playback.rates;
531 if (cpu_dai_drv->playback.rates
532 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
533 runtime->hw.rates |= codec_dai_drv->playback.rates;
534 } else {
535 runtime->hw.rate_min =
536 max(codec_dai_drv->capture.rate_min,
537 cpu_dai_drv->capture.rate_min);
538 runtime->hw.rate_max =
539 min(codec_dai_drv->capture.rate_max,
540 cpu_dai_drv->capture.rate_max);
541 runtime->hw.channels_min =
542 max(codec_dai_drv->capture.channels_min,
543 cpu_dai_drv->capture.channels_min);
544 runtime->hw.channels_max =
545 min(codec_dai_drv->capture.channels_max,
546 cpu_dai_drv->capture.channels_max);
547 runtime->hw.formats =
548 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
549 runtime->hw.rates =
550 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
551 if (codec_dai_drv->capture.rates
552 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
553 runtime->hw.rates |= cpu_dai_drv->capture.rates;
554 if (cpu_dai_drv->capture.rates
555 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
556 runtime->hw.rates |= codec_dai_drv->capture.rates;
557 }
559 snd_pcm_limit_hw_rates(runtime);
560 if (!runtime->hw.rates) {
561 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
562 codec_dai->name, cpu_dai->name);
563 goto config_err;
564 }
565 if (!runtime->hw.formats) {
566 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
567 codec_dai->name, cpu_dai->name);
568 goto config_err;
569 }
570 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
571 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
572 codec_dai->name, cpu_dai->name);
573 goto config_err;
574 }
576 /* Symmetry only applies if we've already got an active stream. */
577 if (cpu_dai->active || codec_dai->active) {
578 ret = soc_pcm_apply_symmetry(substream);
579 if (ret != 0)
580 goto config_err;
581 }
583 pr_debug("asoc: %s <-> %s info:\n",
584 codec_dai->name, cpu_dai->name);
585 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
586 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
587 runtime->hw.channels_max);
588 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
589 runtime->hw.rate_max);
591 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
592 cpu_dai->playback_active++;
593 codec_dai->playback_active++;
594 } else {
595 cpu_dai->capture_active++;
596 codec_dai->capture_active++;
597 }
598 cpu_dai->active++;
599 codec_dai->active++;
600 rtd->codec->active++;
601 mutex_unlock(&pcm_mutex);
602 return 0;
604 config_err:
605 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
606 rtd->dai_link->ops->shutdown(substream);
608 machine_err:
609 if (codec_dai->driver->ops->shutdown)
610 codec_dai->driver->ops->shutdown(substream, codec_dai);
612 codec_dai_err:
613 if (platform->driver->ops->close)
614 platform->driver->ops->close(substream);
616 platform_err:
617 if (cpu_dai->driver->ops->shutdown)
618 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
619 out:
620 mutex_unlock(&pcm_mutex);
621 return ret;
622 }
624 /*
625 * Power down the audio subsystem pmdown_time msecs after close is called.
626 * This is to ensure there are no pops or clicks in between any music tracks
627 * due to DAPM power cycling.
628 */
629 static void close_delayed_work(struct work_struct *work)
630 {
631 struct snd_soc_pcm_runtime *rtd =
632 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
633 struct snd_soc_dai *codec_dai = rtd->codec_dai;
635 mutex_lock(&pcm_mutex);
637 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
638 codec_dai->driver->playback.stream_name,
639 codec_dai->playback_active ? "active" : "inactive",
640 codec_dai->pop_wait ? "yes" : "no");
642 /* are we waiting on this codec DAI stream */
643 if (codec_dai->pop_wait == 1) {
644 codec_dai->pop_wait = 0;
645 snd_soc_dapm_stream_event(rtd,
646 codec_dai->driver->playback.stream_name,
647 SND_SOC_DAPM_STREAM_STOP);
648 }
650 mutex_unlock(&pcm_mutex);
651 }
653 /*
654 * Called by ALSA when a PCM substream is closed. Private data can be
655 * freed here. The cpu DAI, codec DAI, machine and platform are also
656 * shutdown.
657 */
658 static int soc_codec_close(struct snd_pcm_substream *substream)
659 {
660 struct snd_soc_pcm_runtime *rtd = substream->private_data;
661 struct snd_soc_platform *platform = rtd->platform;
662 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
663 struct snd_soc_dai *codec_dai = rtd->codec_dai;
664 struct snd_soc_codec *codec = rtd->codec;
666 mutex_lock(&pcm_mutex);
668 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
669 cpu_dai->playback_active--;
670 codec_dai->playback_active--;
671 } else {
672 cpu_dai->capture_active--;
673 codec_dai->capture_active--;
674 }
676 cpu_dai->active--;
677 codec_dai->active--;
678 codec->active--;
680 /* Muting the DAC suppresses artifacts caused during digital
681 * shutdown, for example from stopping clocks.
682 */
683 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
684 snd_soc_dai_digital_mute(codec_dai, 1);
686 if (cpu_dai->driver->ops->shutdown)
687 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
689 if (codec_dai->driver->ops->shutdown)
690 codec_dai->driver->ops->shutdown(substream, codec_dai);
692 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
693 rtd->dai_link->ops->shutdown(substream);
695 if (platform->driver->ops->close)
696 platform->driver->ops->close(substream);
697 cpu_dai->runtime = NULL;
699 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
700 /* start delayed pop wq here for playback streams */
701 codec_dai->pop_wait = 1;
702 schedule_delayed_work(&rtd->delayed_work,
703 msecs_to_jiffies(rtd->pmdown_time));
704 } else {
705 /* capture streams can be powered down now */
706 snd_soc_dapm_stream_event(rtd,
707 codec_dai->driver->capture.stream_name,
708 SND_SOC_DAPM_STREAM_STOP);
709 }
711 mutex_unlock(&pcm_mutex);
712 return 0;
713 }
715 /*
716 * Called by ALSA when the PCM substream is prepared, can set format, sample
717 * rate, etc. This function is non atomic and can be called multiple times,
718 * it can refer to the runtime info.
719 */
720 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
721 {
722 struct snd_soc_pcm_runtime *rtd = substream->private_data;
723 struct snd_soc_platform *platform = rtd->platform;
724 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
725 struct snd_soc_dai *codec_dai = rtd->codec_dai;
726 int ret = 0;
728 mutex_lock(&pcm_mutex);
730 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
731 ret = rtd->dai_link->ops->prepare(substream);
732 if (ret < 0) {
733 printk(KERN_ERR "asoc: machine prepare error\n");
734 goto out;
735 }
736 }
738 if (platform->driver->ops->prepare) {
739 ret = platform->driver->ops->prepare(substream);
740 if (ret < 0) {
741 printk(KERN_ERR "asoc: platform prepare error\n");
742 goto out;
743 }
744 }
746 if (codec_dai->driver->ops->prepare) {
747 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
748 if (ret < 0) {
749 printk(KERN_ERR "asoc: codec DAI prepare error\n");
750 goto out;
751 }
752 }
754 if (cpu_dai->driver->ops->prepare) {
755 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
756 if (ret < 0) {
757 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
758 goto out;
759 }
760 }
762 /* cancel any delayed stream shutdown that is pending */
763 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
764 codec_dai->pop_wait) {
765 codec_dai->pop_wait = 0;
766 cancel_delayed_work(&rtd->delayed_work);
767 }
769 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
770 snd_soc_dapm_stream_event(rtd,
771 codec_dai->driver->playback.stream_name,
772 SND_SOC_DAPM_STREAM_START);
773 else
774 snd_soc_dapm_stream_event(rtd,
775 codec_dai->driver->capture.stream_name,
776 SND_SOC_DAPM_STREAM_START);
778 snd_soc_dai_digital_mute(codec_dai, 0);
780 out:
781 mutex_unlock(&pcm_mutex);
782 return ret;
783 }
785 /*
786 * Called by ALSA when the hardware params are set by application. This
787 * function can also be called multiple times and can allocate buffers
788 * (using snd_pcm_lib_* ). It's non-atomic.
789 */
790 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
791 struct snd_pcm_hw_params *params)
792 {
793 struct snd_soc_pcm_runtime *rtd = substream->private_data;
794 struct snd_soc_platform *platform = rtd->platform;
795 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
796 struct snd_soc_dai *codec_dai = rtd->codec_dai;
797 int ret = 0;
799 mutex_lock(&pcm_mutex);
801 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
802 ret = rtd->dai_link->ops->hw_params(substream, params);
803 if (ret < 0) {
804 printk(KERN_ERR "asoc: machine hw_params failed\n");
805 goto out;
806 }
807 }
809 if (codec_dai->driver->ops->hw_params) {
810 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
811 if (ret < 0) {
812 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
813 codec_dai->name);
814 goto codec_err;
815 }
816 }
818 if (cpu_dai->driver->ops->hw_params) {
819 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
820 if (ret < 0) {
821 printk(KERN_ERR "asoc: interface %s hw params failed\n",
822 cpu_dai->name);
823 goto interface_err;
824 }
825 }
827 if (platform->driver->ops->hw_params) {
828 ret = platform->driver->ops->hw_params(substream, params);
829 if (ret < 0) {
830 printk(KERN_ERR "asoc: platform %s hw params failed\n",
831 platform->name);
832 goto platform_err;
833 }
834 }
836 rtd->rate = params_rate(params);
838 out:
839 mutex_unlock(&pcm_mutex);
840 return ret;
842 platform_err:
843 if (cpu_dai->driver->ops->hw_free)
844 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
846 interface_err:
847 if (codec_dai->driver->ops->hw_free)
848 codec_dai->driver->ops->hw_free(substream, codec_dai);
850 codec_err:
851 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
852 rtd->dai_link->ops->hw_free(substream);
854 mutex_unlock(&pcm_mutex);
855 return ret;
856 }
858 /*
859 * Frees resources allocated by hw_params, can be called multiple times
860 */
861 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
862 {
863 struct snd_soc_pcm_runtime *rtd = substream->private_data;
864 struct snd_soc_platform *platform = rtd->platform;
865 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
866 struct snd_soc_dai *codec_dai = rtd->codec_dai;
867 struct snd_soc_codec *codec = rtd->codec;
869 mutex_lock(&pcm_mutex);
871 /* apply codec digital mute */
872 if (!codec->active)
873 snd_soc_dai_digital_mute(codec_dai, 1);
875 /* free any machine hw params */
876 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
877 rtd->dai_link->ops->hw_free(substream);
879 /* free any DMA resources */
880 if (platform->driver->ops->hw_free)
881 platform->driver->ops->hw_free(substream);
883 /* now free hw params for the DAIs */
884 if (codec_dai->driver->ops->hw_free)
885 codec_dai->driver->ops->hw_free(substream, codec_dai);
887 if (cpu_dai->driver->ops->hw_free)
888 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
890 mutex_unlock(&pcm_mutex);
891 return 0;
892 }
894 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
895 {
896 struct snd_soc_pcm_runtime *rtd = substream->private_data;
897 struct snd_soc_platform *platform = rtd->platform;
898 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
899 struct snd_soc_dai *codec_dai = rtd->codec_dai;
900 int ret;
902 if (codec_dai->driver->ops->trigger) {
903 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
904 if (ret < 0)
905 return ret;
906 }
908 if (platform->driver->ops->trigger) {
909 ret = platform->driver->ops->trigger(substream, cmd);
910 if (ret < 0)
911 return ret;
912 }
914 if (cpu_dai->driver->ops->trigger) {
915 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
916 if (ret < 0)
917 return ret;
918 }
919 return 0;
920 }
922 /*
923 * soc level wrapper for pointer callback
924 * If cpu_dai, codec_dai, platform driver has the delay callback, than
925 * the runtime->delay will be updated accordingly.
926 */
927 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
928 {
929 struct snd_soc_pcm_runtime *rtd = substream->private_data;
930 struct snd_soc_platform *platform = rtd->platform;
931 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
932 struct snd_soc_dai *codec_dai = rtd->codec_dai;
933 struct snd_pcm_runtime *runtime = substream->runtime;
934 snd_pcm_uframes_t offset = 0;
935 snd_pcm_sframes_t delay = 0;
937 if (platform->driver->ops->pointer)
938 offset = platform->driver->ops->pointer(substream);
940 if (cpu_dai->driver->ops->delay)
941 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
943 if (codec_dai->driver->ops->delay)
944 delay += codec_dai->driver->ops->delay(substream, codec_dai);
946 if (platform->driver->delay)
947 delay += platform->driver->delay(substream, codec_dai);
949 runtime->delay = delay;
951 return offset;
952 }
954 /* ASoC PCM operations */
955 static struct snd_pcm_ops soc_pcm_ops = {
956 .open = soc_pcm_open,
957 .close = soc_codec_close,
958 .hw_params = soc_pcm_hw_params,
959 .hw_free = soc_pcm_hw_free,
960 .prepare = soc_pcm_prepare,
961 .trigger = soc_pcm_trigger,
962 .pointer = soc_pcm_pointer,
963 };
965 #ifdef CONFIG_PM
966 /* powers down audio subsystem for suspend */
967 static int soc_suspend(struct device *dev)
968 {
969 struct platform_device *pdev = to_platform_device(dev);
970 struct snd_soc_card *card = platform_get_drvdata(pdev);
971 struct snd_soc_codec *codec;
972 int i;
974 /* If the initialization of this soc device failed, there is no codec
975 * associated with it. Just bail out in this case.
976 */
977 if (list_empty(&card->codec_dev_list))
978 return 0;
980 /* Due to the resume being scheduled into a workqueue we could
981 * suspend before that's finished - wait for it to complete.
982 */
983 snd_power_lock(card->snd_card);
984 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
985 snd_power_unlock(card->snd_card);
987 /* we're going to block userspace touching us until resume completes */
988 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
990 /* mute any active DACs */
991 for (i = 0; i < card->num_rtd; i++) {
992 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
993 struct snd_soc_dai_driver *drv = dai->driver;
995 if (card->rtd[i].dai_link->ignore_suspend)
996 continue;
998 if (drv->ops->digital_mute && dai->playback_active)
999 drv->ops->digital_mute(dai, 1);
1000 }
1002 /* suspend all pcms */
1003 for (i = 0; i < card->num_rtd; i++) {
1004 if (card->rtd[i].dai_link->ignore_suspend)
1005 continue;
1007 snd_pcm_suspend_all(card->rtd[i].pcm);
1008 }
1010 if (card->suspend_pre)
1011 card->suspend_pre(pdev, PMSG_SUSPEND);
1013 for (i = 0; i < card->num_rtd; i++) {
1014 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1015 struct snd_soc_platform *platform = card->rtd[i].platform;
1017 if (card->rtd[i].dai_link->ignore_suspend)
1018 continue;
1020 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1021 cpu_dai->driver->suspend(cpu_dai);
1022 if (platform->driver->suspend && !platform->suspended) {
1023 platform->driver->suspend(cpu_dai);
1024 platform->suspended = 1;
1025 }
1026 }
1028 /* close any waiting streams and save state */
1029 for (i = 0; i < card->num_rtd; i++) {
1030 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1031 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1032 }
1034 for (i = 0; i < card->num_rtd; i++) {
1035 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1037 if (card->rtd[i].dai_link->ignore_suspend)
1038 continue;
1040 if (driver->playback.stream_name != NULL)
1041 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1042 SND_SOC_DAPM_STREAM_SUSPEND);
1044 if (driver->capture.stream_name != NULL)
1045 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1046 SND_SOC_DAPM_STREAM_SUSPEND);
1047 }
1049 /* suspend all CODECs */
1050 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1051 /* If there are paths active then the CODEC will be held with
1052 * bias _ON and should not be suspended. */
1053 if (!codec->suspended && codec->driver->suspend) {
1054 switch (codec->dapm.bias_level) {
1055 case SND_SOC_BIAS_STANDBY:
1056 case SND_SOC_BIAS_OFF:
1057 codec->driver->suspend(codec, PMSG_SUSPEND);
1058 codec->suspended = 1;
1059 break;
1060 default:
1061 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1062 break;
1063 }
1064 }
1065 }
1067 for (i = 0; i < card->num_rtd; i++) {
1068 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1070 if (card->rtd[i].dai_link->ignore_suspend)
1071 continue;
1073 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1074 cpu_dai->driver->suspend(cpu_dai);
1075 }
1077 if (card->suspend_post)
1078 card->suspend_post(pdev, PMSG_SUSPEND);
1080 return 0;
1081 }
1083 /* deferred resume work, so resume can complete before we finished
1084 * setting our codec back up, which can be very slow on I2C
1085 */
1086 static void soc_resume_deferred(struct work_struct *work)
1087 {
1088 struct snd_soc_card *card =
1089 container_of(work, struct snd_soc_card, deferred_resume_work);
1090 struct platform_device *pdev = to_platform_device(card->dev);
1091 struct snd_soc_codec *codec;
1092 int i;
1094 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1095 * so userspace apps are blocked from touching us
1096 */
1098 dev_dbg(card->dev, "starting resume work\n");
1100 /* Bring us up into D2 so that DAPM starts enabling things */
1101 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1103 if (card->resume_pre)
1104 card->resume_pre(pdev);
1106 /* resume AC97 DAIs */
1107 for (i = 0; i < card->num_rtd; i++) {
1108 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1110 if (card->rtd[i].dai_link->ignore_suspend)
1111 continue;
1113 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1114 cpu_dai->driver->resume(cpu_dai);
1115 }
1117 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1118 /* If the CODEC was idle over suspend then it will have been
1119 * left with bias OFF or STANDBY and suspended so we must now
1120 * resume. Otherwise the suspend was suppressed.
1121 */
1122 if (codec->driver->resume && codec->suspended) {
1123 switch (codec->dapm.bias_level) {
1124 case SND_SOC_BIAS_STANDBY:
1125 case SND_SOC_BIAS_OFF:
1126 codec->driver->resume(codec);
1127 codec->suspended = 0;
1128 break;
1129 default:
1130 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1131 break;
1132 }
1133 }
1134 }
1136 for (i = 0; i < card->num_rtd; i++) {
1137 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1139 if (card->rtd[i].dai_link->ignore_suspend)
1140 continue;
1142 if (driver->playback.stream_name != NULL)
1143 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1144 SND_SOC_DAPM_STREAM_RESUME);
1146 if (driver->capture.stream_name != NULL)
1147 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1148 SND_SOC_DAPM_STREAM_RESUME);
1149 }
1151 /* unmute any active DACs */
1152 for (i = 0; i < card->num_rtd; i++) {
1153 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1154 struct snd_soc_dai_driver *drv = dai->driver;
1156 if (card->rtd[i].dai_link->ignore_suspend)
1157 continue;
1159 if (drv->ops->digital_mute && dai->playback_active)
1160 drv->ops->digital_mute(dai, 0);
1161 }
1163 for (i = 0; i < card->num_rtd; i++) {
1164 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1165 struct snd_soc_platform *platform = card->rtd[i].platform;
1167 if (card->rtd[i].dai_link->ignore_suspend)
1168 continue;
1170 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1171 cpu_dai->driver->resume(cpu_dai);
1172 if (platform->driver->resume && platform->suspended) {
1173 platform->driver->resume(cpu_dai);
1174 platform->suspended = 0;
1175 }
1176 }
1178 if (card->resume_post)
1179 card->resume_post(pdev);
1181 dev_dbg(card->dev, "resume work completed\n");
1183 /* userspace can access us now we are back as we were before */
1184 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1185 }
1187 /* powers up audio subsystem after a suspend */
1188 static int soc_resume(struct device *dev)
1189 {
1190 struct platform_device *pdev = to_platform_device(dev);
1191 struct snd_soc_card *card = platform_get_drvdata(pdev);
1192 int i;
1194 /* AC97 devices might have other drivers hanging off them so
1195 * need to resume immediately. Other drivers don't have that
1196 * problem and may take a substantial amount of time to resume
1197 * due to I/O costs and anti-pop so handle them out of line.
1198 */
1199 for (i = 0; i < card->num_rtd; i++) {
1200 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1201 if (cpu_dai->driver->ac97_control) {
1202 dev_dbg(dev, "Resuming AC97 immediately\n");
1203 soc_resume_deferred(&card->deferred_resume_work);
1204 } else {
1205 dev_dbg(dev, "Scheduling resume work\n");
1206 if (!schedule_work(&card->deferred_resume_work))
1207 dev_err(dev, "resume work item may be lost\n");
1208 }
1209 }
1211 return 0;
1212 }
1213 #else
1214 #define soc_suspend NULL
1215 #define soc_resume NULL
1216 #endif
1218 static struct snd_soc_dai_ops null_dai_ops = {
1219 };
1221 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1222 {
1223 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1224 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1225 struct snd_soc_codec *codec;
1226 struct snd_soc_platform *platform;
1227 struct snd_soc_dai *codec_dai, *cpu_dai;
1229 if (rtd->complete)
1230 return 1;
1231 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1233 /* do we already have the CPU DAI for this link ? */
1234 if (rtd->cpu_dai) {
1235 goto find_codec;
1236 }
1237 /* no, then find CPU DAI from registered DAIs*/
1238 list_for_each_entry(cpu_dai, &dai_list, list) {
1239 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1241 if (!try_module_get(cpu_dai->dev->driver->owner))
1242 return -ENODEV;
1244 rtd->cpu_dai = cpu_dai;
1245 goto find_codec;
1246 }
1247 }
1248 dev_dbg(card->dev, "CPU DAI %s not registered\n",
1249 dai_link->cpu_dai_name);
1251 find_codec:
1252 /* do we already have the CODEC for this link ? */
1253 if (rtd->codec) {
1254 goto find_platform;
1255 }
1257 /* no, then find CODEC from registered CODECs*/
1258 list_for_each_entry(codec, &codec_list, list) {
1259 if (!strcmp(codec->name, dai_link->codec_name)) {
1260 rtd->codec = codec;
1262 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1263 list_for_each_entry(codec_dai, &dai_list, list) {
1264 if (codec->dev == codec_dai->dev &&
1265 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1266 rtd->codec_dai = codec_dai;
1267 goto find_platform;
1268 }
1269 }
1270 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1271 dai_link->codec_dai_name);
1273 goto find_platform;
1274 }
1275 }
1276 dev_dbg(card->dev, "CODEC %s not registered\n",
1277 dai_link->codec_name);
1279 find_platform:
1280 /* do we already have the CODEC DAI for this link ? */
1281 if (rtd->platform) {
1282 goto out;
1283 }
1284 /* no, then find CPU DAI from registered DAIs*/
1285 list_for_each_entry(platform, &platform_list, list) {
1286 if (!strcmp(platform->name, dai_link->platform_name)) {
1287 rtd->platform = platform;
1288 goto out;
1289 }
1290 }
1292 dev_dbg(card->dev, "platform %s not registered\n",
1293 dai_link->platform_name);
1294 return 0;
1296 out:
1297 /* mark rtd as complete if we found all 4 of our client devices */
1298 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1299 rtd->complete = 1;
1300 card->num_rtd++;
1301 }
1302 return 1;
1303 }
1305 static void soc_remove_codec(struct snd_soc_codec *codec)
1306 {
1307 int err;
1309 if (codec->driver->remove) {
1310 err = codec->driver->remove(codec);
1311 if (err < 0)
1312 dev_err(codec->dev,
1313 "asoc: failed to remove %s: %d\n",
1314 codec->name, err);
1315 }
1317 /* Make sure all DAPM widgets are freed */
1318 snd_soc_dapm_free(&codec->dapm);
1320 soc_cleanup_codec_debugfs(codec);
1321 codec->probed = 0;
1322 list_del(&codec->card_list);
1323 module_put(codec->dev->driver->owner);
1324 }
1326 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1327 {
1328 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1329 struct snd_soc_codec *codec = rtd->codec;
1330 struct snd_soc_platform *platform = rtd->platform;
1331 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1332 int err;
1334 /* unregister the rtd device */
1335 if (rtd->dev_registered) {
1336 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1337 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1338 device_unregister(&rtd->dev);
1339 rtd->dev_registered = 0;
1340 }
1342 /* remove the CODEC DAI */
1343 if (codec_dai && codec_dai->probed) {
1344 if (codec_dai->driver->remove) {
1345 err = codec_dai->driver->remove(codec_dai);
1346 if (err < 0)
1347 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1348 }
1349 codec_dai->probed = 0;
1350 list_del(&codec_dai->card_list);
1351 }
1353 /* remove the platform */
1354 if (platform && platform->probed) {
1355 if (platform->driver->remove) {
1356 err = platform->driver->remove(platform);
1357 if (err < 0)
1358 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1359 }
1360 platform->probed = 0;
1361 list_del(&platform->card_list);
1362 module_put(platform->dev->driver->owner);
1363 }
1365 /* remove the CODEC */
1366 if (codec && codec->probed)
1367 soc_remove_codec(codec);
1369 /* remove the cpu_dai */
1370 if (cpu_dai && cpu_dai->probed) {
1371 if (cpu_dai->driver->remove) {
1372 err = cpu_dai->driver->remove(cpu_dai);
1373 if (err < 0)
1374 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1375 }
1376 cpu_dai->probed = 0;
1377 list_del(&cpu_dai->card_list);
1378 module_put(cpu_dai->dev->driver->owner);
1379 }
1380 }
1382 static void soc_set_name_prefix(struct snd_soc_card *card,
1383 struct snd_soc_codec *codec)
1384 {
1385 int i;
1387 if (card->codec_conf == NULL)
1388 return;
1390 for (i = 0; i < card->num_configs; i++) {
1391 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1392 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1393 codec->name_prefix = map->name_prefix;
1394 break;
1395 }
1396 }
1397 }
1399 static int soc_probe_codec(struct snd_soc_card *card,
1400 struct snd_soc_codec *codec)
1401 {
1402 int ret = 0;
1404 codec->card = card;
1405 codec->dapm.card = card;
1406 soc_set_name_prefix(card, codec);
1408 if (codec->driver->probe) {
1409 ret = codec->driver->probe(codec);
1410 if (ret < 0) {
1411 dev_err(codec->dev,
1412 "asoc: failed to probe CODEC %s: %d\n",
1413 codec->name, ret);
1414 return ret;
1415 }
1416 }
1418 soc_init_codec_debugfs(codec);
1420 /* mark codec as probed and add to card codec list */
1421 if (!try_module_get(codec->dev->driver->owner))
1422 return -ENODEV;
1424 codec->probed = 1;
1425 list_add(&codec->card_list, &card->codec_dev_list);
1426 list_add(&codec->dapm.list, &card->dapm_list);
1428 return ret;
1429 }
1431 static void rtd_release(struct device *dev) {}
1433 static int soc_post_component_init(struct snd_soc_card *card,
1434 struct snd_soc_codec *codec,
1435 int num, int dailess)
1436 {
1437 struct snd_soc_dai_link *dai_link = NULL;
1438 struct snd_soc_aux_dev *aux_dev = NULL;
1439 struct snd_soc_pcm_runtime *rtd;
1440 const char *temp, *name;
1441 int ret = 0;
1443 if (!dailess) {
1444 dai_link = &card->dai_link[num];
1445 rtd = &card->rtd[num];
1446 name = dai_link->name;
1447 } else {
1448 aux_dev = &card->aux_dev[num];
1449 rtd = &card->rtd_aux[num];
1450 name = aux_dev->name;
1451 }
1453 /* machine controls, routes and widgets are not prefixed */
1454 temp = codec->name_prefix;
1455 codec->name_prefix = NULL;
1457 /* do machine specific initialization */
1458 if (!dailess && dai_link->init)
1459 ret = dai_link->init(rtd);
1460 else if (dailess && aux_dev->init)
1461 ret = aux_dev->init(&codec->dapm);
1462 if (ret < 0) {
1463 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1464 return ret;
1465 }
1466 codec->name_prefix = temp;
1468 /* Make sure all DAPM widgets are instantiated */
1469 snd_soc_dapm_new_widgets(&codec->dapm);
1470 snd_soc_dapm_sync(&codec->dapm);
1472 /* register the rtd device */
1473 rtd->codec = codec;
1474 rtd->card = card;
1475 rtd->dev.parent = card->dev;
1476 rtd->dev.release = rtd_release;
1477 rtd->dev.init_name = name;
1478 ret = device_register(&rtd->dev);
1479 if (ret < 0) {
1480 dev_err(card->dev,
1481 "asoc: failed to register runtime device: %d\n", ret);
1482 return ret;
1483 }
1484 rtd->dev_registered = 1;
1486 /* add DAPM sysfs entries for this codec */
1487 ret = snd_soc_dapm_sys_add(&rtd->dev);
1488 if (ret < 0)
1489 dev_err(codec->dev,
1490 "asoc: failed to add codec dapm sysfs entries: %d\n",
1491 ret);
1493 /* add codec sysfs entries */
1494 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1495 if (ret < 0)
1496 dev_err(codec->dev,
1497 "asoc: failed to add codec sysfs files: %d\n", ret);
1499 return 0;
1500 }
1502 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1503 {
1504 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1505 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1506 struct snd_soc_codec *codec = rtd->codec;
1507 struct snd_soc_platform *platform = rtd->platform;
1508 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1509 int ret;
1511 dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1513 /* config components */
1514 codec_dai->codec = codec;
1515 cpu_dai->platform = platform;
1516 codec_dai->card = card;
1517 cpu_dai->card = card;
1519 /* set default power off timeout */
1520 rtd->pmdown_time = pmdown_time;
1522 /* probe the cpu_dai */
1523 if (!cpu_dai->probed) {
1524 if (cpu_dai->driver->probe) {
1525 ret = cpu_dai->driver->probe(cpu_dai);
1526 if (ret < 0) {
1527 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1528 cpu_dai->name);
1529 return ret;
1530 }
1531 }
1532 cpu_dai->probed = 1;
1533 /* mark cpu_dai as probed and add to card cpu_dai list */
1534 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1535 }
1537 /* probe the CODEC */
1538 if (!codec->probed) {
1539 ret = soc_probe_codec(card, codec);
1540 if (ret < 0)
1541 return ret;
1542 }
1544 /* probe the platform */
1545 if (!platform->probed) {
1546 if (platform->driver->probe) {
1547 ret = platform->driver->probe(platform);
1548 if (ret < 0) {
1549 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1550 platform->name);
1551 return ret;
1552 }
1553 }
1554 /* mark platform as probed and add to card platform list */
1556 if (!try_module_get(platform->dev->driver->owner))
1557 return -ENODEV;
1559 platform->probed = 1;
1560 list_add(&platform->card_list, &card->platform_dev_list);
1561 }
1563 /* probe the CODEC DAI */
1564 if (!codec_dai->probed) {
1565 if (codec_dai->driver->probe) {
1566 ret = codec_dai->driver->probe(codec_dai);
1567 if (ret < 0) {
1568 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1569 codec_dai->name);
1570 return ret;
1571 }
1572 }
1574 /* mark cpu_dai as probed and add to card cpu_dai list */
1575 codec_dai->probed = 1;
1576 list_add(&codec_dai->card_list, &card->dai_dev_list);
1577 }
1579 /* DAPM dai link stream work */
1580 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1582 ret = soc_post_component_init(card, codec, num, 0);
1583 if (ret)
1584 return ret;
1586 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1587 if (ret < 0)
1588 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1590 /* create the pcm */
1591 ret = soc_new_pcm(rtd, num);
1592 if (ret < 0) {
1593 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1594 return ret;
1595 }
1597 /* add platform data for AC97 devices */
1598 if (rtd->codec_dai->driver->ac97_control)
1599 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1601 return 0;
1602 }
1604 #ifdef CONFIG_SND_SOC_AC97_BUS
1605 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1606 {
1607 int ret;
1609 /* Only instantiate AC97 if not already done by the adaptor
1610 * for the generic AC97 subsystem.
1611 */
1612 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1613 /*
1614 * It is possible that the AC97 device is already registered to
1615 * the device subsystem. This happens when the device is created
1616 * via snd_ac97_mixer(). Currently only SoC codec that does so
1617 * is the generic AC97 glue but others migh emerge.
1618 *
1619 * In those cases we don't try to register the device again.
1620 */
1621 if (!rtd->codec->ac97_created)
1622 return 0;
1624 ret = soc_ac97_dev_register(rtd->codec);
1625 if (ret < 0) {
1626 printk(KERN_ERR "asoc: AC97 device register failed\n");
1627 return ret;
1628 }
1630 rtd->codec->ac97_registered = 1;
1631 }
1632 return 0;
1633 }
1635 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1636 {
1637 if (codec->ac97_registered) {
1638 soc_ac97_dev_unregister(codec);
1639 codec->ac97_registered = 0;
1640 }
1641 }
1642 #endif
1644 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1645 {
1646 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1647 struct snd_soc_codec *codec;
1648 int ret = -ENODEV;
1650 /* find CODEC from registered CODECs*/
1651 list_for_each_entry(codec, &codec_list, list) {
1652 if (!strcmp(codec->name, aux_dev->codec_name)) {
1653 if (codec->probed) {
1654 dev_err(codec->dev,
1655 "asoc: codec already probed");
1656 ret = -EBUSY;
1657 goto out;
1658 }
1659 goto found;
1660 }
1661 }
1662 /* codec not found */
1663 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1664 goto out;
1666 found:
1667 ret = soc_probe_codec(card, codec);
1668 if (ret < 0)
1669 return ret;
1671 ret = soc_post_component_init(card, codec, num, 1);
1673 out:
1674 return ret;
1675 }
1677 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1678 {
1679 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1680 struct snd_soc_codec *codec = rtd->codec;
1682 /* unregister the rtd device */
1683 if (rtd->dev_registered) {
1684 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1685 device_unregister(&rtd->dev);
1686 rtd->dev_registered = 0;
1687 }
1689 if (codec && codec->probed)
1690 soc_remove_codec(codec);
1691 }
1693 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1694 enum snd_soc_compress_type compress_type)
1695 {
1696 int ret;
1698 if (codec->cache_init)
1699 return 0;
1701 /* override the compress_type if necessary */
1702 if (compress_type && codec->compress_type != compress_type)
1703 codec->compress_type = compress_type;
1704 ret = snd_soc_cache_init(codec);
1705 if (ret < 0) {
1706 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1707 ret);
1708 return ret;
1709 }
1710 codec->cache_init = 1;
1711 return 0;
1712 }
1714 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1715 {
1716 struct platform_device *pdev = to_platform_device(card->dev);
1717 struct snd_soc_codec *codec;
1718 struct snd_soc_codec_conf *codec_conf;
1719 enum snd_soc_compress_type compress_type;
1720 int ret, i;
1722 mutex_lock(&card->mutex);
1724 if (card->instantiated) {
1725 mutex_unlock(&card->mutex);
1726 return;
1727 }
1729 /* bind DAIs */
1730 for (i = 0; i < card->num_links; i++)
1731 soc_bind_dai_link(card, i);
1733 /* bind completed ? */
1734 if (card->num_rtd != card->num_links) {
1735 mutex_unlock(&card->mutex);
1736 return;
1737 }
1739 /* initialize the register cache for each available codec */
1740 list_for_each_entry(codec, &codec_list, list) {
1741 if (codec->cache_init)
1742 continue;
1743 /* check to see if we need to override the compress_type */
1744 for (i = 0; i < card->num_configs; ++i) {
1745 codec_conf = &card->codec_conf[i];
1746 if (!strcmp(codec->name, codec_conf->dev_name)) {
1747 compress_type = codec_conf->compress_type;
1748 if (compress_type && compress_type
1749 != codec->compress_type)
1750 break;
1751 }
1752 }
1753 if (i == card->num_configs) {
1754 /* no need to override the compress_type so
1755 * go ahead and do the standard thing */
1756 ret = snd_soc_init_codec_cache(codec, 0);
1757 if (ret < 0) {
1758 mutex_unlock(&card->mutex);
1759 return;
1760 }
1761 continue;
1762 }
1763 /* override the compress_type with the one supplied in
1764 * the machine driver */
1765 ret = snd_soc_init_codec_cache(codec, compress_type);
1766 if (ret < 0) {
1767 mutex_unlock(&card->mutex);
1768 return;
1769 }
1770 }
1772 /* card bind complete so register a sound card */
1773 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1774 card->owner, 0, &card->snd_card);
1775 if (ret < 0) {
1776 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1777 card->name);
1778 mutex_unlock(&card->mutex);
1779 return;
1780 }
1781 card->snd_card->dev = card->dev;
1783 #ifdef CONFIG_PM
1784 /* deferred resume work */
1785 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1786 #endif
1788 /* initialise the sound card only once */
1789 if (card->probe) {
1790 ret = card->probe(pdev);
1791 if (ret < 0)
1792 goto card_probe_error;
1793 }
1795 for (i = 0; i < card->num_links; i++) {
1796 ret = soc_probe_dai_link(card, i);
1797 if (ret < 0) {
1798 pr_err("asoc: failed to instantiate card %s: %d\n",
1799 card->name, ret);
1800 goto probe_dai_err;
1801 }
1802 }
1804 for (i = 0; i < card->num_aux_devs; i++) {
1805 ret = soc_probe_aux_dev(card, i);
1806 if (ret < 0) {
1807 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1808 card->name, ret);
1809 goto probe_aux_dev_err;
1810 }
1811 }
1813 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1814 "%s", card->name);
1815 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1816 "%s", card->name);
1818 ret = snd_card_register(card->snd_card);
1819 if (ret < 0) {
1820 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1821 goto probe_aux_dev_err;
1822 }
1824 #ifdef CONFIG_SND_SOC_AC97_BUS
1825 /* register any AC97 codecs */
1826 for (i = 0; i < card->num_rtd; i++) {
1827 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1828 if (ret < 0) {
1829 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1830 while (--i >= 0)
1831 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1832 goto probe_aux_dev_err;
1833 }
1834 }
1835 #endif
1837 card->instantiated = 1;
1838 mutex_unlock(&card->mutex);
1839 return;
1841 probe_aux_dev_err:
1842 for (i = 0; i < card->num_aux_devs; i++)
1843 soc_remove_aux_dev(card, i);
1845 probe_dai_err:
1846 for (i = 0; i < card->num_links; i++)
1847 soc_remove_dai_link(card, i);
1849 card_probe_error:
1850 if (card->remove)
1851 card->remove(pdev);
1853 snd_card_free(card->snd_card);
1855 mutex_unlock(&card->mutex);
1856 }
1858 /*
1859 * Attempt to initialise any uninitialised cards. Must be called with
1860 * client_mutex.
1861 */
1862 static void snd_soc_instantiate_cards(void)
1863 {
1864 struct snd_soc_card *card;
1865 list_for_each_entry(card, &card_list, list)
1866 snd_soc_instantiate_card(card);
1867 }
1869 /* probes a new socdev */
1870 static int soc_probe(struct platform_device *pdev)
1871 {
1872 struct snd_soc_card *card = platform_get_drvdata(pdev);
1873 int ret = 0;
1875 /* Bodge while we unpick instantiation */
1876 card->dev = &pdev->dev;
1877 INIT_LIST_HEAD(&card->dai_dev_list);
1878 INIT_LIST_HEAD(&card->codec_dev_list);
1879 INIT_LIST_HEAD(&card->platform_dev_list);
1880 INIT_LIST_HEAD(&card->widgets);
1881 INIT_LIST_HEAD(&card->paths);
1882 INIT_LIST_HEAD(&card->dapm_list);
1884 soc_init_card_debugfs(card);
1886 ret = snd_soc_register_card(card);
1887 if (ret != 0) {
1888 dev_err(&pdev->dev, "Failed to register card\n");
1889 return ret;
1890 }
1892 return 0;
1893 }
1895 /* removes a socdev */
1896 static int soc_remove(struct platform_device *pdev)
1897 {
1898 struct snd_soc_card *card = platform_get_drvdata(pdev);
1899 int i;
1901 if (card->instantiated) {
1903 /* make sure any delayed work runs */
1904 for (i = 0; i < card->num_rtd; i++) {
1905 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1906 flush_delayed_work_sync(&rtd->delayed_work);
1907 }
1909 /* remove auxiliary devices */
1910 for (i = 0; i < card->num_aux_devs; i++)
1911 soc_remove_aux_dev(card, i);
1913 /* remove and free each DAI */
1914 for (i = 0; i < card->num_rtd; i++)
1915 soc_remove_dai_link(card, i);
1917 soc_cleanup_card_debugfs(card);
1919 /* remove the card */
1920 if (card->remove)
1921 card->remove(pdev);
1923 kfree(card->rtd);
1924 snd_card_free(card->snd_card);
1925 }
1926 snd_soc_unregister_card(card);
1927 return 0;
1928 }
1930 static int soc_poweroff(struct device *dev)
1931 {
1932 struct platform_device *pdev = to_platform_device(dev);
1933 struct snd_soc_card *card = platform_get_drvdata(pdev);
1934 int i;
1936 if (!card->instantiated)
1937 return 0;
1939 /* Flush out pmdown_time work - we actually do want to run it
1940 * now, we're shutting down so no imminent restart. */
1941 for (i = 0; i < card->num_rtd; i++) {
1942 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1943 flush_delayed_work_sync(&rtd->delayed_work);
1944 }
1946 snd_soc_dapm_shutdown(card);
1948 return 0;
1949 }
1951 static const struct dev_pm_ops soc_pm_ops = {
1952 .suspend = soc_suspend,
1953 .resume = soc_resume,
1954 .poweroff = soc_poweroff,
1955 };
1957 /* ASoC platform driver */
1958 static struct platform_driver soc_driver = {
1959 .driver = {
1960 .name = "soc-audio",
1961 .owner = THIS_MODULE,
1962 .pm = &soc_pm_ops,
1963 },
1964 .probe = soc_probe,
1965 .remove = soc_remove,
1966 };
1968 /* create a new pcm */
1969 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
1970 {
1971 struct snd_soc_codec *codec = rtd->codec;
1972 struct snd_soc_platform *platform = rtd->platform;
1973 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1974 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1975 struct snd_pcm *pcm;
1976 char new_name[64];
1977 int ret = 0, playback = 0, capture = 0;
1979 /* check client and interface hw capabilities */
1980 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1981 rtd->dai_link->stream_name, codec_dai->name, num);
1983 if (codec_dai->driver->playback.channels_min)
1984 playback = 1;
1985 if (codec_dai->driver->capture.channels_min)
1986 capture = 1;
1988 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
1989 ret = snd_pcm_new(rtd->card->snd_card, new_name,
1990 num, playback, capture, &pcm);
1991 if (ret < 0) {
1992 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
1993 return ret;
1994 }
1996 rtd->pcm = pcm;
1997 pcm->private_data = rtd;
1998 soc_pcm_ops.mmap = platform->driver->ops->mmap;
1999 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2000 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2001 soc_pcm_ops.copy = platform->driver->ops->copy;
2002 soc_pcm_ops.silence = platform->driver->ops->silence;
2003 soc_pcm_ops.ack = platform->driver->ops->ack;
2004 soc_pcm_ops.page = platform->driver->ops->page;
2006 if (playback)
2007 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2009 if (capture)
2010 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2012 ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2013 if (ret < 0) {
2014 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2015 return ret;
2016 }
2018 pcm->private_free = platform->driver->pcm_free;
2019 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2020 cpu_dai->name);
2021 return ret;
2022 }
2024 /**
2025 * snd_soc_codec_volatile_register: Report if a register is volatile.
2026 *
2027 * @codec: CODEC to query.
2028 * @reg: Register to query.
2029 *
2030 * Boolean function indiciating if a CODEC register is volatile.
2031 */
2032 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
2033 {
2034 if (codec->driver->volatile_register)
2035 return codec->driver->volatile_register(reg);
2036 else
2037 return 0;
2038 }
2039 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2041 /**
2042 * snd_soc_new_ac97_codec - initailise AC97 device
2043 * @codec: audio codec
2044 * @ops: AC97 bus operations
2045 * @num: AC97 codec number
2046 *
2047 * Initialises AC97 codec resources for use by ad-hoc devices only.
2048 */
2049 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2050 struct snd_ac97_bus_ops *ops, int num)
2051 {
2052 mutex_lock(&codec->mutex);
2054 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2055 if (codec->ac97 == NULL) {
2056 mutex_unlock(&codec->mutex);
2057 return -ENOMEM;
2058 }
2060 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2061 if (codec->ac97->bus == NULL) {
2062 kfree(codec->ac97);
2063 codec->ac97 = NULL;
2064 mutex_unlock(&codec->mutex);
2065 return -ENOMEM;
2066 }
2068 codec->ac97->bus->ops = ops;
2069 codec->ac97->num = num;
2071 /*
2072 * Mark the AC97 device to be created by us. This way we ensure that the
2073 * device will be registered with the device subsystem later on.
2074 */
2075 codec->ac97_created = 1;
2077 mutex_unlock(&codec->mutex);
2078 return 0;
2079 }
2080 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2082 /**
2083 * snd_soc_free_ac97_codec - free AC97 codec device
2084 * @codec: audio codec
2085 *
2086 * Frees AC97 codec device resources.
2087 */
2088 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2089 {
2090 mutex_lock(&codec->mutex);
2091 #ifdef CONFIG_SND_SOC_AC97_BUS
2092 soc_unregister_ac97_dai_link(codec);
2093 #endif
2094 kfree(codec->ac97->bus);
2095 kfree(codec->ac97);
2096 codec->ac97 = NULL;
2097 codec->ac97_created = 0;
2098 mutex_unlock(&codec->mutex);
2099 }
2100 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2102 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2103 {
2104 unsigned int ret;
2106 ret = codec->read(codec, reg);
2107 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2108 trace_snd_soc_reg_read(codec, reg, ret);
2110 return ret;
2111 }
2112 EXPORT_SYMBOL_GPL(snd_soc_read);
2114 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2115 unsigned int reg, unsigned int val)
2116 {
2117 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2118 trace_snd_soc_reg_write(codec, reg, val);
2119 return codec->write(codec, reg, val);
2120 }
2121 EXPORT_SYMBOL_GPL(snd_soc_write);
2123 /**
2124 * snd_soc_update_bits - update codec register bits
2125 * @codec: audio codec
2126 * @reg: codec register
2127 * @mask: register mask
2128 * @value: new value
2129 *
2130 * Writes new register value.
2131 *
2132 * Returns 1 for change else 0.
2133 */
2134 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2135 unsigned int mask, unsigned int value)
2136 {
2137 int change;
2138 unsigned int old, new;
2140 old = snd_soc_read(codec, reg);
2141 new = (old & ~mask) | value;
2142 change = old != new;
2143 if (change)
2144 snd_soc_write(codec, reg, new);
2146 return change;
2147 }
2148 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2150 /**
2151 * snd_soc_update_bits_locked - update codec register bits
2152 * @codec: audio codec
2153 * @reg: codec register
2154 * @mask: register mask
2155 * @value: new value
2156 *
2157 * Writes new register value, and takes the codec mutex.
2158 *
2159 * Returns 1 for change else 0.
2160 */
2161 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2162 unsigned short reg, unsigned int mask,
2163 unsigned int value)
2164 {
2165 int change;
2167 mutex_lock(&codec->mutex);
2168 change = snd_soc_update_bits(codec, reg, mask, value);
2169 mutex_unlock(&codec->mutex);
2171 return change;
2172 }
2173 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2175 /**
2176 * snd_soc_test_bits - test register for change
2177 * @codec: audio codec
2178 * @reg: codec register
2179 * @mask: register mask
2180 * @value: new value
2181 *
2182 * Tests a register with a new value and checks if the new value is
2183 * different from the old value.
2184 *
2185 * Returns 1 for change else 0.
2186 */
2187 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2188 unsigned int mask, unsigned int value)
2189 {
2190 int change;
2191 unsigned int old, new;
2193 old = snd_soc_read(codec, reg);
2194 new = (old & ~mask) | value;
2195 change = old != new;
2197 return change;
2198 }
2199 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2201 /**
2202 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2203 * @substream: the pcm substream
2204 * @hw: the hardware parameters
2205 *
2206 * Sets the substream runtime hardware parameters.
2207 */
2208 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2209 const struct snd_pcm_hardware *hw)
2210 {
2211 struct snd_pcm_runtime *runtime = substream->runtime;
2212 runtime->hw.info = hw->info;
2213 runtime->hw.formats = hw->formats;
2214 runtime->hw.period_bytes_min = hw->period_bytes_min;
2215 runtime->hw.period_bytes_max = hw->period_bytes_max;
2216 runtime->hw.periods_min = hw->periods_min;
2217 runtime->hw.periods_max = hw->periods_max;
2218 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2219 runtime->hw.fifo_size = hw->fifo_size;
2220 return 0;
2221 }
2222 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2224 /**
2225 * snd_soc_cnew - create new control
2226 * @_template: control template
2227 * @data: control private data
2228 * @long_name: control long name
2229 *
2230 * Create a new mixer control from a template control.
2231 *
2232 * Returns 0 for success, else error.
2233 */
2234 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2235 void *data, char *long_name)
2236 {
2237 struct snd_kcontrol_new template;
2239 memcpy(&template, _template, sizeof(template));
2240 if (long_name)
2241 template.name = long_name;
2242 template.index = 0;
2244 return snd_ctl_new1(&template, data);
2245 }
2246 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2248 /**
2249 * snd_soc_add_controls - add an array of controls to a codec.
2250 * Convienience function to add a list of controls. Many codecs were
2251 * duplicating this code.
2252 *
2253 * @codec: codec to add controls to
2254 * @controls: array of controls to add
2255 * @num_controls: number of elements in the array
2256 *
2257 * Return 0 for success, else error.
2258 */
2259 int snd_soc_add_controls(struct snd_soc_codec *codec,
2260 const struct snd_kcontrol_new *controls, int num_controls)
2261 {
2262 struct snd_card *card = codec->card->snd_card;
2263 char prefixed_name[44], *name;
2264 int err, i;
2266 for (i = 0; i < num_controls; i++) {
2267 const struct snd_kcontrol_new *control = &controls[i];
2268 if (codec->name_prefix) {
2269 snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
2270 codec->name_prefix, control->name);
2271 name = prefixed_name;
2272 } else {
2273 name = control->name;
2274 }
2275 err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
2276 if (err < 0) {
2277 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2278 codec->name, name, err);
2279 return err;
2280 }
2281 }
2283 return 0;
2284 }
2285 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2287 /**
2288 * snd_soc_info_enum_double - enumerated double mixer info callback
2289 * @kcontrol: mixer control
2290 * @uinfo: control element information
2291 *
2292 * Callback to provide information about a double enumerated
2293 * mixer control.
2294 *
2295 * Returns 0 for success.
2296 */
2297 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2298 struct snd_ctl_elem_info *uinfo)
2299 {
2300 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2302 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2303 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2304 uinfo->value.enumerated.items = e->max;
2306 if (uinfo->value.enumerated.item > e->max - 1)
2307 uinfo->value.enumerated.item = e->max - 1;
2308 strcpy(uinfo->value.enumerated.name,
2309 e->texts[uinfo->value.enumerated.item]);
2310 return 0;
2311 }
2312 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2314 /**
2315 * snd_soc_get_enum_double - enumerated double mixer get callback
2316 * @kcontrol: mixer control
2317 * @ucontrol: control element information
2318 *
2319 * Callback to get the value of a double enumerated mixer.
2320 *
2321 * Returns 0 for success.
2322 */
2323 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2324 struct snd_ctl_elem_value *ucontrol)
2325 {
2326 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2327 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2328 unsigned int val, bitmask;
2330 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2331 ;
2332 val = snd_soc_read(codec, e->reg);
2333 ucontrol->value.enumerated.item[0]
2334 = (val >> e->shift_l) & (bitmask - 1);
2335 if (e->shift_l != e->shift_r)
2336 ucontrol->value.enumerated.item[1] =
2337 (val >> e->shift_r) & (bitmask - 1);
2339 return 0;
2340 }
2341 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2343 /**
2344 * snd_soc_put_enum_double - enumerated double mixer put callback
2345 * @kcontrol: mixer control
2346 * @ucontrol: control element information
2347 *
2348 * Callback to set the value of a double enumerated mixer.
2349 *
2350 * Returns 0 for success.
2351 */
2352 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2353 struct snd_ctl_elem_value *ucontrol)
2354 {
2355 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2356 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2357 unsigned int val;
2358 unsigned int mask, bitmask;
2360 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2361 ;
2362 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2363 return -EINVAL;
2364 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2365 mask = (bitmask - 1) << e->shift_l;
2366 if (e->shift_l != e->shift_r) {
2367 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2368 return -EINVAL;
2369 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2370 mask |= (bitmask - 1) << e->shift_r;
2371 }
2373 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2374 }
2375 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2377 /**
2378 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2379 * @kcontrol: mixer control
2380 * @ucontrol: control element information
2381 *
2382 * Callback to get the value of a double semi enumerated mixer.
2383 *
2384 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2385 * used for handling bitfield coded enumeration for example.
2386 *
2387 * Returns 0 for success.
2388 */
2389 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2390 struct snd_ctl_elem_value *ucontrol)
2391 {
2392 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2393 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2394 unsigned int reg_val, val, mux;
2396 reg_val = snd_soc_read(codec, e->reg);
2397 val = (reg_val >> e->shift_l) & e->mask;
2398 for (mux = 0; mux < e->max; mux++) {
2399 if (val == e->values[mux])
2400 break;
2401 }
2402 ucontrol->value.enumerated.item[0] = mux;
2403 if (e->shift_l != e->shift_r) {
2404 val = (reg_val >> e->shift_r) & e->mask;
2405 for (mux = 0; mux < e->max; mux++) {
2406 if (val == e->values[mux])
2407 break;
2408 }
2409 ucontrol->value.enumerated.item[1] = mux;
2410 }
2412 return 0;
2413 }
2414 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2416 /**
2417 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2418 * @kcontrol: mixer control
2419 * @ucontrol: control element information
2420 *
2421 * Callback to set the value of a double semi enumerated mixer.
2422 *
2423 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2424 * used for handling bitfield coded enumeration for example.
2425 *
2426 * Returns 0 for success.
2427 */
2428 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2429 struct snd_ctl_elem_value *ucontrol)
2430 {
2431 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2432 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2433 unsigned int val;
2434 unsigned int mask;
2436 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2437 return -EINVAL;
2438 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2439 mask = e->mask << e->shift_l;
2440 if (e->shift_l != e->shift_r) {
2441 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2442 return -EINVAL;
2443 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2444 mask |= e->mask << e->shift_r;
2445 }
2447 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2448 }
2449 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2451 /**
2452 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2453 * @kcontrol: mixer control
2454 * @uinfo: control element information
2455 *
2456 * Callback to provide information about an external enumerated
2457 * single mixer.
2458 *
2459 * Returns 0 for success.
2460 */
2461 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2462 struct snd_ctl_elem_info *uinfo)
2463 {
2464 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2466 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2467 uinfo->count = 1;
2468 uinfo->value.enumerated.items = e->max;
2470 if (uinfo->value.enumerated.item > e->max - 1)
2471 uinfo->value.enumerated.item = e->max - 1;
2472 strcpy(uinfo->value.enumerated.name,
2473 e->texts[uinfo->value.enumerated.item]);
2474 return 0;
2475 }
2476 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2478 /**
2479 * snd_soc_info_volsw_ext - external single mixer info callback
2480 * @kcontrol: mixer control
2481 * @uinfo: control element information
2482 *
2483 * Callback to provide information about a single external mixer control.
2484 *
2485 * Returns 0 for success.
2486 */
2487 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2488 struct snd_ctl_elem_info *uinfo)
2489 {
2490 int max = kcontrol->private_value;
2492 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2493 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2494 else
2495 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2497 uinfo->count = 1;
2498 uinfo->value.integer.min = 0;
2499 uinfo->value.integer.max = max;
2500 return 0;
2501 }
2502 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2504 /**
2505 * snd_soc_info_volsw - single mixer info callback
2506 * @kcontrol: mixer control
2507 * @uinfo: control element information
2508 *
2509 * Callback to provide information about a single mixer control.
2510 *
2511 * Returns 0 for success.
2512 */
2513 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2514 struct snd_ctl_elem_info *uinfo)
2515 {
2516 struct soc_mixer_control *mc =
2517 (struct soc_mixer_control *)kcontrol->private_value;
2518 int platform_max;
2519 unsigned int shift = mc->shift;
2520 unsigned int rshift = mc->rshift;
2522 if (!mc->platform_max)
2523 mc->platform_max = mc->max;
2524 platform_max = mc->platform_max;
2526 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2527 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2528 else
2529 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2531 uinfo->count = shift == rshift ? 1 : 2;
2532 uinfo->value.integer.min = 0;
2533 uinfo->value.integer.max = platform_max;
2534 return 0;
2535 }
2536 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2538 /**
2539 * snd_soc_get_volsw - single mixer get callback
2540 * @kcontrol: mixer control
2541 * @ucontrol: control element information
2542 *
2543 * Callback to get the value of a single mixer control.
2544 *
2545 * Returns 0 for success.
2546 */
2547 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2548 struct snd_ctl_elem_value *ucontrol)
2549 {
2550 struct soc_mixer_control *mc =
2551 (struct soc_mixer_control *)kcontrol->private_value;
2552 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2553 unsigned int reg = mc->reg;
2554 unsigned int shift = mc->shift;
2555 unsigned int rshift = mc->rshift;
2556 int max = mc->max;
2557 unsigned int mask = (1 << fls(max)) - 1;
2558 unsigned int invert = mc->invert;
2560 ucontrol->value.integer.value[0] =
2561 (snd_soc_read(codec, reg) >> shift) & mask;
2562 if (shift != rshift)
2563 ucontrol->value.integer.value[1] =
2564 (snd_soc_read(codec, reg) >> rshift) & mask;
2565 if (invert) {
2566 ucontrol->value.integer.value[0] =
2567 max - ucontrol->value.integer.value[0];
2568 if (shift != rshift)
2569 ucontrol->value.integer.value[1] =
2570 max - ucontrol->value.integer.value[1];
2571 }
2573 return 0;
2574 }
2575 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2577 /**
2578 * snd_soc_put_volsw - single mixer put callback
2579 * @kcontrol: mixer control
2580 * @ucontrol: control element information
2581 *
2582 * Callback to set the value of a single mixer control.
2583 *
2584 * Returns 0 for success.
2585 */
2586 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2587 struct snd_ctl_elem_value *ucontrol)
2588 {
2589 struct soc_mixer_control *mc =
2590 (struct soc_mixer_control *)kcontrol->private_value;
2591 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2592 unsigned int reg = mc->reg;
2593 unsigned int shift = mc->shift;
2594 unsigned int rshift = mc->rshift;
2595 int max = mc->max;
2596 unsigned int mask = (1 << fls(max)) - 1;
2597 unsigned int invert = mc->invert;
2598 unsigned int val, val2, val_mask;
2600 val = (ucontrol->value.integer.value[0] & mask);
2601 if (invert)
2602 val = max - val;
2603 val_mask = mask << shift;
2604 val = val << shift;
2605 if (shift != rshift) {
2606 val2 = (ucontrol->value.integer.value[1] & mask);
2607 if (invert)
2608 val2 = max - val2;
2609 val_mask |= mask << rshift;
2610 val |= val2 << rshift;
2611 }
2612 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2613 }
2614 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2616 /**
2617 * snd_soc_info_volsw_2r - double mixer info callback
2618 * @kcontrol: mixer control
2619 * @uinfo: control element information
2620 *
2621 * Callback to provide information about a double mixer control that
2622 * spans 2 codec registers.
2623 *
2624 * Returns 0 for success.
2625 */
2626 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2627 struct snd_ctl_elem_info *uinfo)
2628 {
2629 struct soc_mixer_control *mc =
2630 (struct soc_mixer_control *)kcontrol->private_value;
2631 int platform_max;
2633 if (!mc->platform_max)
2634 mc->platform_max = mc->max;
2635 platform_max = mc->platform_max;
2637 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2638 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2639 else
2640 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2642 uinfo->count = 2;
2643 uinfo->value.integer.min = 0;
2644 uinfo->value.integer.max = platform_max;
2645 return 0;
2646 }
2647 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2649 /**
2650 * snd_soc_get_volsw_2r - double mixer get callback
2651 * @kcontrol: mixer control
2652 * @ucontrol: control element information
2653 *
2654 * Callback to get the value of a double mixer control that spans 2 registers.
2655 *
2656 * Returns 0 for success.
2657 */
2658 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2659 struct snd_ctl_elem_value *ucontrol)
2660 {
2661 struct soc_mixer_control *mc =
2662 (struct soc_mixer_control *)kcontrol->private_value;
2663 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2664 unsigned int reg = mc->reg;
2665 unsigned int reg2 = mc->rreg;
2666 unsigned int shift = mc->shift;
2667 int max = mc->max;
2668 unsigned int mask = (1 << fls(max)) - 1;
2669 unsigned int invert = mc->invert;
2671 ucontrol->value.integer.value[0] =
2672 (snd_soc_read(codec, reg) >> shift) & mask;
2673 ucontrol->value.integer.value[1] =
2674 (snd_soc_read(codec, reg2) >> shift) & mask;
2675 if (invert) {
2676 ucontrol->value.integer.value[0] =
2677 max - ucontrol->value.integer.value[0];
2678 ucontrol->value.integer.value[1] =
2679 max - ucontrol->value.integer.value[1];
2680 }
2682 return 0;
2683 }
2684 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2686 /**
2687 * snd_soc_put_volsw_2r - double mixer set callback
2688 * @kcontrol: mixer control
2689 * @ucontrol: control element information
2690 *
2691 * Callback to set the value of a double mixer control that spans 2 registers.
2692 *
2693 * Returns 0 for success.
2694 */
2695 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2696 struct snd_ctl_elem_value *ucontrol)
2697 {
2698 struct soc_mixer_control *mc =
2699 (struct soc_mixer_control *)kcontrol->private_value;
2700 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2701 unsigned int reg = mc->reg;
2702 unsigned int reg2 = mc->rreg;
2703 unsigned int shift = mc->shift;
2704 int max = mc->max;
2705 unsigned int mask = (1 << fls(max)) - 1;
2706 unsigned int invert = mc->invert;
2707 int err;
2708 unsigned int val, val2, val_mask;
2710 val_mask = mask << shift;
2711 val = (ucontrol->value.integer.value[0] & mask);
2712 val2 = (ucontrol->value.integer.value[1] & mask);
2714 if (invert) {
2715 val = max - val;
2716 val2 = max - val2;
2717 }
2719 val = val << shift;
2720 val2 = val2 << shift;
2722 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2723 if (err < 0)
2724 return err;
2726 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2727 return err;
2728 }
2729 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2731 /**
2732 * snd_soc_info_volsw_s8 - signed mixer info callback
2733 * @kcontrol: mixer control
2734 * @uinfo: control element information
2735 *
2736 * Callback to provide information about a signed mixer control.
2737 *
2738 * Returns 0 for success.
2739 */
2740 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2741 struct snd_ctl_elem_info *uinfo)
2742 {
2743 struct soc_mixer_control *mc =
2744 (struct soc_mixer_control *)kcontrol->private_value;
2745 int platform_max;
2746 int min = mc->min;
2748 if (!mc->platform_max)
2749 mc->platform_max = mc->max;
2750 platform_max = mc->platform_max;
2752 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2753 uinfo->count = 2;
2754 uinfo->value.integer.min = 0;
2755 uinfo->value.integer.max = platform_max - min;
2756 return 0;
2757 }
2758 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2760 /**
2761 * snd_soc_get_volsw_s8 - signed mixer get callback
2762 * @kcontrol: mixer control
2763 * @ucontrol: control element information
2764 *
2765 * Callback to get the value of a signed mixer control.
2766 *
2767 * Returns 0 for success.
2768 */
2769 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2770 struct snd_ctl_elem_value *ucontrol)
2771 {
2772 struct soc_mixer_control *mc =
2773 (struct soc_mixer_control *)kcontrol->private_value;
2774 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2775 unsigned int reg = mc->reg;
2776 int min = mc->min;
2777 int val = snd_soc_read(codec, reg);
2779 ucontrol->value.integer.value[0] =
2780 ((signed char)(val & 0xff))-min;
2781 ucontrol->value.integer.value[1] =
2782 ((signed char)((val >> 8) & 0xff))-min;
2783 return 0;
2784 }
2785 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2787 /**
2788 * snd_soc_put_volsw_sgn - signed mixer put callback
2789 * @kcontrol: mixer control
2790 * @ucontrol: control element information
2791 *
2792 * Callback to set the value of a signed mixer control.
2793 *
2794 * Returns 0 for success.
2795 */
2796 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2797 struct snd_ctl_elem_value *ucontrol)
2798 {
2799 struct soc_mixer_control *mc =
2800 (struct soc_mixer_control *)kcontrol->private_value;
2801 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2802 unsigned int reg = mc->reg;
2803 int min = mc->min;
2804 unsigned int val;
2806 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2807 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2809 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2810 }
2811 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2813 /**
2814 * snd_soc_limit_volume - Set new limit to an existing volume control.
2815 *
2816 * @codec: where to look for the control
2817 * @name: Name of the control
2818 * @max: new maximum limit
2819 *
2820 * Return 0 for success, else error.
2821 */
2822 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2823 const char *name, int max)
2824 {
2825 struct snd_card *card = codec->card->snd_card;
2826 struct snd_kcontrol *kctl;
2827 struct soc_mixer_control *mc;
2828 int found = 0;
2829 int ret = -EINVAL;
2831 /* Sanity check for name and max */
2832 if (unlikely(!name || max <= 0))
2833 return -EINVAL;
2835 list_for_each_entry(kctl, &card->controls, list) {
2836 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2837 found = 1;
2838 break;
2839 }
2840 }
2841 if (found) {
2842 mc = (struct soc_mixer_control *)kctl->private_value;
2843 if (max <= mc->max) {
2844 mc->platform_max = max;
2845 ret = 0;
2846 }
2847 }
2848 return ret;
2849 }
2850 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2852 /**
2853 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2854 * mixer info callback
2855 * @kcontrol: mixer control
2856 * @uinfo: control element information
2857 *
2858 * Returns 0 for success.
2859 */
2860 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2861 struct snd_ctl_elem_info *uinfo)
2862 {
2863 struct soc_mixer_control *mc =
2864 (struct soc_mixer_control *)kcontrol->private_value;
2865 int max = mc->max;
2866 int min = mc->min;
2868 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2869 uinfo->count = 2;
2870 uinfo->value.integer.min = 0;
2871 uinfo->value.integer.max = max-min;
2873 return 0;
2874 }
2875 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2877 /**
2878 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2879 * mixer get callback
2880 * @kcontrol: mixer control
2881 * @uinfo: control element information
2882 *
2883 * Returns 0 for success.
2884 */
2885 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2886 struct snd_ctl_elem_value *ucontrol)
2887 {
2888 struct soc_mixer_control *mc =
2889 (struct soc_mixer_control *)kcontrol->private_value;
2890 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2891 unsigned int mask = (1<<mc->shift)-1;
2892 int min = mc->min;
2893 int val = snd_soc_read(codec, mc->reg) & mask;
2894 int valr = snd_soc_read(codec, mc->rreg) & mask;
2896 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2897 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2898 return 0;
2899 }
2900 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2902 /**
2903 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2904 * mixer put callback
2905 * @kcontrol: mixer control
2906 * @uinfo: control element information
2907 *
2908 * Returns 0 for success.
2909 */
2910 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2911 struct snd_ctl_elem_value *ucontrol)
2912 {
2913 struct soc_mixer_control *mc =
2914 (struct soc_mixer_control *)kcontrol->private_value;
2915 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2916 unsigned int mask = (1<<mc->shift)-1;
2917 int min = mc->min;
2918 int ret;
2919 unsigned int val, valr, oval, ovalr;
2921 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2922 val &= mask;
2923 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2924 valr &= mask;
2926 oval = snd_soc_read(codec, mc->reg) & mask;
2927 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2929 ret = 0;
2930 if (oval != val) {
2931 ret = snd_soc_write(codec, mc->reg, val);
2932 if (ret < 0)
2933 return ret;
2934 }
2935 if (ovalr != valr) {
2936 ret = snd_soc_write(codec, mc->rreg, valr);
2937 if (ret < 0)
2938 return ret;
2939 }
2941 return 0;
2942 }
2943 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2945 /**
2946 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2947 * @dai: DAI
2948 * @clk_id: DAI specific clock ID
2949 * @freq: new clock frequency in Hz
2950 * @dir: new clock direction - input/output.
2951 *
2952 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2953 */
2954 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2955 unsigned int freq, int dir)
2956 {
2957 if (dai->driver && dai->driver->ops->set_sysclk)
2958 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2959 else
2960 return -EINVAL;
2961 }
2962 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2964 /**
2965 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2966 * @dai: DAI
2967 * @div_id: DAI specific clock divider ID
2968 * @div: new clock divisor.
2969 *
2970 * Configures the clock dividers. This is used to derive the best DAI bit and
2971 * frame clocks from the system or master clock. It's best to set the DAI bit
2972 * and frame clocks as low as possible to save system power.
2973 */
2974 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2975 int div_id, int div)
2976 {
2977 if (dai->driver && dai->driver->ops->set_clkdiv)
2978 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2979 else
2980 return -EINVAL;
2981 }
2982 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2984 /**
2985 * snd_soc_dai_set_pll - configure DAI PLL.
2986 * @dai: DAI
2987 * @pll_id: DAI specific PLL ID
2988 * @source: DAI specific source for the PLL
2989 * @freq_in: PLL input clock frequency in Hz
2990 * @freq_out: requested PLL output clock frequency in Hz
2991 *
2992 * Configures and enables PLL to generate output clock based on input clock.
2993 */
2994 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2995 unsigned int freq_in, unsigned int freq_out)
2996 {
2997 if (dai->driver && dai->driver->ops->set_pll)
2998 return dai->driver->ops->set_pll(dai, pll_id, source,
2999 freq_in, freq_out);
3000 else
3001 return -EINVAL;
3002 }
3003 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3005 /**
3006 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3007 * @dai: DAI
3008 * @fmt: SND_SOC_DAIFMT_ format value.
3009 *
3010 * Configures the DAI hardware format and clocking.
3011 */
3012 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3013 {
3014 if (dai->driver && dai->driver->ops->set_fmt)
3015 return dai->driver->ops->set_fmt(dai, fmt);
3016 else
3017 return -EINVAL;
3018 }
3019 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3021 /**
3022 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3023 * @dai: DAI
3024 * @tx_mask: bitmask representing active TX slots.
3025 * @rx_mask: bitmask representing active RX slots.
3026 * @slots: Number of slots in use.
3027 * @slot_width: Width in bits for each slot.
3028 *
3029 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3030 * specific.
3031 */
3032 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3033 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3034 {
3035 if (dai->driver && dai->driver->ops->set_tdm_slot)
3036 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3037 slots, slot_width);
3038 else
3039 return -EINVAL;
3040 }
3041 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3043 /**
3044 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3045 * @dai: DAI
3046 * @tx_num: how many TX channels
3047 * @tx_slot: pointer to an array which imply the TX slot number channel
3048 * 0~num-1 uses
3049 * @rx_num: how many RX channels
3050 * @rx_slot: pointer to an array which imply the RX slot number channel
3051 * 0~num-1 uses
3052 *
3053 * configure the relationship between channel number and TDM slot number.
3054 */
3055 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3056 unsigned int tx_num, unsigned int *tx_slot,
3057 unsigned int rx_num, unsigned int *rx_slot)
3058 {
3059 if (dai->driver && dai->driver->ops->set_channel_map)
3060 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3061 rx_num, rx_slot);
3062 else
3063 return -EINVAL;
3064 }
3065 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3067 /**
3068 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3069 * @dai: DAI
3070 * @tristate: tristate enable
3071 *
3072 * Tristates the DAI so that others can use it.
3073 */
3074 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3075 {
3076 if (dai->driver && dai->driver->ops->set_tristate)
3077 return dai->driver->ops->set_tristate(dai, tristate);
3078 else
3079 return -EINVAL;
3080 }
3081 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3083 /**
3084 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3085 * @dai: DAI
3086 * @mute: mute enable
3087 *
3088 * Mutes the DAI DAC.
3089 */
3090 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3091 {
3092 if (dai->driver && dai->driver->ops->digital_mute)
3093 return dai->driver->ops->digital_mute(dai, mute);
3094 else
3095 return -EINVAL;
3096 }
3097 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3099 /**
3100 * snd_soc_register_card - Register a card with the ASoC core
3101 *
3102 * @card: Card to register
3103 *
3104 * Note that currently this is an internal only function: it will be
3105 * exposed to machine drivers after further backporting of ASoC v2
3106 * registration APIs.
3107 */
3108 static int snd_soc_register_card(struct snd_soc_card *card)
3109 {
3110 int i;
3112 if (!card->name || !card->dev)
3113 return -EINVAL;
3115 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3116 (card->num_links + card->num_aux_devs),
3117 GFP_KERNEL);
3118 if (card->rtd == NULL)
3119 return -ENOMEM;
3120 card->rtd_aux = &card->rtd[card->num_links];
3122 for (i = 0; i < card->num_links; i++)
3123 card->rtd[i].dai_link = &card->dai_link[i];
3125 INIT_LIST_HEAD(&card->list);
3126 card->instantiated = 0;
3127 mutex_init(&card->mutex);
3129 mutex_lock(&client_mutex);
3130 list_add(&card->list, &card_list);
3131 snd_soc_instantiate_cards();
3132 mutex_unlock(&client_mutex);
3134 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3136 return 0;
3137 }
3139 /**
3140 * snd_soc_unregister_card - Unregister a card with the ASoC core
3141 *
3142 * @card: Card to unregister
3143 *
3144 * Note that currently this is an internal only function: it will be
3145 * exposed to machine drivers after further backporting of ASoC v2
3146 * registration APIs.
3147 */
3148 static int snd_soc_unregister_card(struct snd_soc_card *card)
3149 {
3150 mutex_lock(&client_mutex);
3151 list_del(&card->list);
3152 mutex_unlock(&client_mutex);
3153 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3155 return 0;
3156 }
3158 /*
3159 * Simplify DAI link configuration by removing ".-1" from device names
3160 * and sanitizing names.
3161 */
3162 static char *fmt_single_name(struct device *dev, int *id)
3163 {
3164 char *found, name[NAME_SIZE];
3165 int id1, id2;
3167 if (dev_name(dev) == NULL)
3168 return NULL;
3170 strlcpy(name, dev_name(dev), NAME_SIZE);
3172 /* are we a "%s.%d" name (platform and SPI components) */
3173 found = strstr(name, dev->driver->name);
3174 if (found) {
3175 /* get ID */
3176 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3178 /* discard ID from name if ID == -1 */
3179 if (*id == -1)
3180 found[strlen(dev->driver->name)] = '\0';
3181 }
3183 } else {
3184 /* I2C component devices are named "bus-addr" */
3185 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3186 char tmp[NAME_SIZE];
3188 /* create unique ID number from I2C addr and bus */
3189 *id = ((id1 & 0xffff) << 16) + id2;
3191 /* sanitize component name for DAI link creation */
3192 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3193 strlcpy(name, tmp, NAME_SIZE);
3194 } else
3195 *id = 0;
3196 }
3198 return kstrdup(name, GFP_KERNEL);
3199 }
3201 /*
3202 * Simplify DAI link naming for single devices with multiple DAIs by removing
3203 * any ".-1" and using the DAI name (instead of device name).
3204 */
3205 static inline char *fmt_multiple_name(struct device *dev,
3206 struct snd_soc_dai_driver *dai_drv)
3207 {
3208 if (dai_drv->name == NULL) {
3209 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3210 dev_name(dev));
3211 return NULL;
3212 }
3214 return kstrdup(dai_drv->name, GFP_KERNEL);
3215 }
3217 /**
3218 * snd_soc_register_dai - Register a DAI with the ASoC core
3219 *
3220 * @dai: DAI to register
3221 */
3222 int snd_soc_register_dai(struct device *dev,
3223 struct snd_soc_dai_driver *dai_drv)
3224 {
3225 struct snd_soc_dai *dai;
3227 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3229 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3230 if (dai == NULL)
3231 return -ENOMEM;
3233 /* create DAI component name */
3234 dai->name = fmt_single_name(dev, &dai->id);
3235 if (dai->name == NULL) {
3236 kfree(dai);
3237 return -ENOMEM;
3238 }
3240 dai->dev = dev;
3241 dai->driver = dai_drv;
3242 if (!dai->driver->ops)
3243 dai->driver->ops = &null_dai_ops;
3245 mutex_lock(&client_mutex);
3246 list_add(&dai->list, &dai_list);
3247 snd_soc_instantiate_cards();
3248 mutex_unlock(&client_mutex);
3250 pr_debug("Registered DAI '%s'\n", dai->name);
3252 return 0;
3253 }
3254 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3256 /**
3257 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3258 *
3259 * @dai: DAI to unregister
3260 */
3261 void snd_soc_unregister_dai(struct device *dev)
3262 {
3263 struct snd_soc_dai *dai;
3265 list_for_each_entry(dai, &dai_list, list) {
3266 if (dev == dai->dev)
3267 goto found;
3268 }
3269 return;
3271 found:
3272 mutex_lock(&client_mutex);
3273 list_del(&dai->list);
3274 mutex_unlock(&client_mutex);
3276 pr_debug("Unregistered DAI '%s'\n", dai->name);
3277 kfree(dai->name);
3278 kfree(dai);
3279 }
3280 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3282 /**
3283 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3284 *
3285 * @dai: Array of DAIs to register
3286 * @count: Number of DAIs
3287 */
3288 int snd_soc_register_dais(struct device *dev,
3289 struct snd_soc_dai_driver *dai_drv, size_t count)
3290 {
3291 struct snd_soc_dai *dai;
3292 int i, ret = 0;
3294 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3296 for (i = 0; i < count; i++) {
3298 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3299 if (dai == NULL) {
3300 ret = -ENOMEM;
3301 goto err;
3302 }
3304 /* create DAI component name */
3305 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3306 if (dai->name == NULL) {
3307 kfree(dai);
3308 ret = -EINVAL;
3309 goto err;
3310 }
3312 dai->dev = dev;
3313 dai->driver = &dai_drv[i];
3314 if (dai->driver->id)
3315 dai->id = dai->driver->id;
3316 else
3317 dai->id = i;
3318 if (!dai->driver->ops)
3319 dai->driver->ops = &null_dai_ops;
3321 mutex_lock(&client_mutex);
3322 list_add(&dai->list, &dai_list);
3323 mutex_unlock(&client_mutex);
3325 pr_debug("Registered DAI '%s'\n", dai->name);
3326 }
3328 mutex_lock(&client_mutex);
3329 snd_soc_instantiate_cards();
3330 mutex_unlock(&client_mutex);
3331 return 0;
3333 err:
3334 for (i--; i >= 0; i--)
3335 snd_soc_unregister_dai(dev);
3337 return ret;
3338 }
3339 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3341 /**
3342 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3343 *
3344 * @dai: Array of DAIs to unregister
3345 * @count: Number of DAIs
3346 */
3347 void snd_soc_unregister_dais(struct device *dev, size_t count)
3348 {
3349 int i;
3351 for (i = 0; i < count; i++)
3352 snd_soc_unregister_dai(dev);
3353 }
3354 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3356 /**
3357 * snd_soc_register_platform - Register a platform with the ASoC core
3358 *
3359 * @platform: platform to register
3360 */
3361 int snd_soc_register_platform(struct device *dev,
3362 struct snd_soc_platform_driver *platform_drv)
3363 {
3364 struct snd_soc_platform *platform;
3366 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3368 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3369 if (platform == NULL)
3370 return -ENOMEM;
3372 /* create platform component name */
3373 platform->name = fmt_single_name(dev, &platform->id);
3374 if (platform->name == NULL) {
3375 kfree(platform);
3376 return -ENOMEM;
3377 }
3379 platform->dev = dev;
3380 platform->driver = platform_drv;
3382 mutex_lock(&client_mutex);
3383 list_add(&platform->list, &platform_list);
3384 snd_soc_instantiate_cards();
3385 mutex_unlock(&client_mutex);
3387 pr_debug("Registered platform '%s'\n", platform->name);
3389 return 0;
3390 }
3391 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3393 /**
3394 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3395 *
3396 * @platform: platform to unregister
3397 */
3398 void snd_soc_unregister_platform(struct device *dev)
3399 {
3400 struct snd_soc_platform *platform;
3402 list_for_each_entry(platform, &platform_list, list) {
3403 if (dev == platform->dev)
3404 goto found;
3405 }
3406 return;
3408 found:
3409 mutex_lock(&client_mutex);
3410 list_del(&platform->list);
3411 mutex_unlock(&client_mutex);
3413 pr_debug("Unregistered platform '%s'\n", platform->name);
3414 kfree(platform->name);
3415 kfree(platform);
3416 }
3417 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3419 static u64 codec_format_map[] = {
3420 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3421 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3422 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3423 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3424 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3425 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3426 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3427 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3428 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3429 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3430 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3431 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3432 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3433 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3434 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3435 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3436 };
3438 /* Fix up the DAI formats for endianness: codecs don't actually see
3439 * the endianness of the data but we're using the CPU format
3440 * definitions which do need to include endianness so we ensure that
3441 * codec DAIs always have both big and little endian variants set.
3442 */
3443 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3444 {
3445 int i;
3447 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3448 if (stream->formats & codec_format_map[i])
3449 stream->formats |= codec_format_map[i];
3450 }
3452 /**
3453 * snd_soc_register_codec - Register a codec with the ASoC core
3454 *
3455 * @codec: codec to register
3456 */
3457 int snd_soc_register_codec(struct device *dev,
3458 const struct snd_soc_codec_driver *codec_drv,
3459 struct snd_soc_dai_driver *dai_drv,
3460 int num_dai)
3461 {
3462 size_t reg_size;
3463 struct snd_soc_codec *codec;
3464 int ret, i;
3466 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3468 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3469 if (codec == NULL)
3470 return -ENOMEM;
3472 /* create CODEC component name */
3473 codec->name = fmt_single_name(dev, &codec->id);
3474 if (codec->name == NULL) {
3475 kfree(codec);
3476 return -ENOMEM;
3477 }
3479 if (codec_drv->compress_type)
3480 codec->compress_type = codec_drv->compress_type;
3481 else
3482 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3484 codec->write = codec_drv->write;
3485 codec->read = codec_drv->read;
3486 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3487 codec->dapm.dev = dev;
3488 codec->dapm.codec = codec;
3489 codec->dev = dev;
3490 codec->driver = codec_drv;
3491 codec->num_dai = num_dai;
3492 mutex_init(&codec->mutex);
3494 /* allocate CODEC register cache */
3495 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3496 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3497 /* it is necessary to make a copy of the default register cache
3498 * because in the case of using a compression type that requires
3499 * the default register cache to be marked as __devinitconst the
3500 * kernel might have freed the array by the time we initialize
3501 * the cache.
3502 */
3503 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3504 reg_size, GFP_KERNEL);
3505 if (!codec->reg_def_copy) {
3506 ret = -ENOMEM;
3507 goto fail;
3508 }
3509 }
3511 for (i = 0; i < num_dai; i++) {
3512 fixup_codec_formats(&dai_drv[i].playback);
3513 fixup_codec_formats(&dai_drv[i].capture);
3514 }
3516 /* register any DAIs */
3517 if (num_dai) {
3518 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3519 if (ret < 0)
3520 goto fail;
3521 }
3523 mutex_lock(&client_mutex);
3524 list_add(&codec->list, &codec_list);
3525 snd_soc_instantiate_cards();
3526 mutex_unlock(&client_mutex);
3528 pr_debug("Registered codec '%s'\n", codec->name);
3529 return 0;
3531 fail:
3532 kfree(codec->reg_def_copy);
3533 codec->reg_def_copy = NULL;
3534 kfree(codec->name);
3535 kfree(codec);
3536 return ret;
3537 }
3538 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3540 /**
3541 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3542 *
3543 * @codec: codec to unregister
3544 */
3545 void snd_soc_unregister_codec(struct device *dev)
3546 {
3547 struct snd_soc_codec *codec;
3548 int i;
3550 list_for_each_entry(codec, &codec_list, list) {
3551 if (dev == codec->dev)
3552 goto found;
3553 }
3554 return;
3556 found:
3557 if (codec->num_dai)
3558 for (i = 0; i < codec->num_dai; i++)
3559 snd_soc_unregister_dai(dev);
3561 mutex_lock(&client_mutex);
3562 list_del(&codec->list);
3563 mutex_unlock(&client_mutex);
3565 pr_debug("Unregistered codec '%s'\n", codec->name);
3567 snd_soc_cache_exit(codec);
3568 kfree(codec->reg_def_copy);
3569 kfree(codec->name);
3570 kfree(codec);
3571 }
3572 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3574 static int __init snd_soc_init(void)
3575 {
3576 #ifdef CONFIG_DEBUG_FS
3577 debugfs_root = debugfs_create_dir("asoc", NULL);
3578 if (IS_ERR(debugfs_root) || !debugfs_root) {
3579 printk(KERN_WARNING
3580 "ASoC: Failed to create debugfs directory\n");
3581 debugfs_root = NULL;
3582 }
3584 if (!debugfs_create_file("codecs", 0444, debugfs_root, NULL,
3585 &codec_list_fops))
3586 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3588 if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,
3589 &dai_list_fops))
3590 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3592 if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,
3593 &platform_list_fops))
3594 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3595 #endif
3597 return platform_driver_register(&soc_driver);
3598 }
3599 module_init(snd_soc_init);
3601 static void __exit snd_soc_exit(void)
3602 {
3603 #ifdef CONFIG_DEBUG_FS
3604 debugfs_remove_recursive(debugfs_root);
3605 #endif
3606 platform_driver_unregister(&soc_driver);
3607 }
3608 module_exit(snd_soc_exit);
3610 /* Module information */
3611 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3612 MODULE_DESCRIPTION("ALSA SoC Core");
3613 MODULE_LICENSE("GPL");
3614 MODULE_ALIAS("platform:soc-audio");