soc-core.c 100.6 KB
Newer Older
F
Frank Mandarino 已提交
1 2 3 4
/*
 * soc-core.c  --  ALSA SoC Audio Layer
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
5
 * Copyright 2005 Openedhand Ltd.
6 7
 * Copyright (C) 2010 Slimlogic Ltd.
 * Copyright (C) 2010 Texas Instruments Inc.
8
 *
9
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 11
 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
F
Frank Mandarino 已提交
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  TODO:
 *   o Add hw rules to enforce rates, etc.
 *   o More testing with other codecs/machines.
 *   o Add more codecs and platforms to ensure good API coverage.
 *   o Support TDM on PCM and I2S
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
31
#include <linux/debugfs.h>
F
Frank Mandarino 已提交
32
#include <linux/platform_device.h>
33
#include <linux/slab.h>
34
#include <sound/ac97_codec.h>
F
Frank Mandarino 已提交
35
#include <sound/core.h>
36
#include <sound/jack.h>
F
Frank Mandarino 已提交
37 38 39 40 41
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>

42 43 44
#define CREATE_TRACE_POINTS
#include <trace/events/asoc.h>

45 46
#define NAME_SIZE	32

F
Frank Mandarino 已提交
47 48 49
static DEFINE_MUTEX(pcm_mutex);
static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);

50
#ifdef CONFIG_DEBUG_FS
51 52
struct dentry *snd_soc_debugfs_root;
EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 54
#endif

M
Mark Brown 已提交
55 56
static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(card_list);
M
Mark Brown 已提交
57
static LIST_HEAD(dai_list);
M
Mark Brown 已提交
58
static LIST_HEAD(platform_list);
M
Mark Brown 已提交
59
static LIST_HEAD(codec_list);
M
Mark Brown 已提交
60

61
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
M
Mark Brown 已提交
62

F
Frank Mandarino 已提交
63 64 65 66 67 68 69 70 71
/*
 * This is a timeout to do a DAPM powerdown after a stream is closed().
 * It can be used to eliminate pops between different playback streams, e.g.
 * between two audio tracks.
 */
static int pmdown_time = 5000;
module_param(pmdown_time, int, 0);
MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");

72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89
/* returns the minimum number of bytes needed to represent
 * a particular given value */
static int min_bytes_needed(unsigned long val)
{
	int c = 0;
	int i;

	for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
		if (val & (1UL << i))
			break;
	c = (sizeof val * 8) - c;
	if (!c || (c % 8))
		c = (c + 8) / 8;
	else
		c /= 8;
	return c;
}

90 91 92 93 94
/* fill buf which is 'len' bytes with a formatted
 * string of the form 'reg: value\n' */
static int format_register_str(struct snd_soc_codec *codec,
			       unsigned int reg, char *buf, size_t len)
{
95 96
	int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	int regsize = codec->driver->reg_word_size * 2;
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124
	int ret;
	char tmpbuf[len + 1];
	char regbuf[regsize + 1];

	/* since tmpbuf is allocated on the stack, warn the callers if they
	 * try to abuse this function */
	WARN_ON(len > 63);

	/* +2 for ': ' and + 1 for '\n' */
	if (wordsize + regsize + 2 + 1 != len)
		return -EINVAL;

	ret = snd_soc_read(codec , reg);
	if (ret < 0) {
		memset(regbuf, 'X', regsize);
		regbuf[regsize] = '\0';
	} else {
		snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
	}

	/* prepare the buffer */
	snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
	/* copy it back to the caller without the '\0' */
	memcpy(buf, tmpbuf, len);

	return 0;
}

125
/* codec register dump */
126 127
static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
				  size_t count, loff_t pos)
128
{
129
	int i, step = 1;
130
	int wordsize, regsize;
131 132 133
	int len;
	size_t total = 0;
	loff_t p = 0;
134

135 136
	wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	regsize = codec->driver->reg_word_size * 2;
137

138 139
	len = wordsize + regsize + 2 + 1;

140
	if (!codec->driver->reg_cache_size)
141 142
		return 0;

143 144
	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
145

146
	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147
		if (codec->readable_register && !codec->readable_register(codec, i))
148
			continue;
149 150
		if (codec->driver->display_register) {
			count += codec->driver->display_register(codec, buf + count,
151
							 PAGE_SIZE - count, i);
152
		} else {
153 154 155 156 157 158 159 160 161
			/* only support larger than PAGE_SIZE bytes debugfs
			 * entries for the default case */
			if (p >= pos) {
				if (total + len >= count - 1)
					break;
				format_register_str(codec, i, buf + total, len);
				total += len;
			}
			p += len;
162
		}
163 164
	}

165
	total = min(total, count - 1);
166

167
	return total;
168
}
169

170 171 172
static ssize_t codec_reg_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
173 174 175
	struct snd_soc_pcm_runtime *rtd =
			container_of(dev, struct snd_soc_pcm_runtime, dev);

176
	return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
177 178 179 180
}

static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);

181 182 183
static ssize_t pmdown_time_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
184 185
	struct snd_soc_pcm_runtime *rtd =
			container_of(dev, struct snd_soc_pcm_runtime, dev);
186

187
	return sprintf(buf, "%ld\n", rtd->pmdown_time);
188 189 190 191 192 193
}

static ssize_t pmdown_time_set(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
194 195
	struct snd_soc_pcm_runtime *rtd =
			container_of(dev, struct snd_soc_pcm_runtime, dev);
196
	int ret;
197

198 199 200
	ret = strict_strtol(buf, 10, &rtd->pmdown_time);
	if (ret)
		return ret;
201 202 203 204 205 206

	return count;
}

static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);

207 208 209 210 211 212 213 214
#ifdef CONFIG_DEBUG_FS
static int codec_reg_open_file(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
215
				   size_t count, loff_t *ppos)
216 217 218
{
	ssize_t ret;
	struct snd_soc_codec *codec = file->private_data;
219 220 221 222 223 224
	char *buf;

	if (*ppos < 0 || !count)
		return -EINVAL;

	buf = kmalloc(count, GFP_KERNEL);
225 226
	if (!buf)
		return -ENOMEM;
227 228 229 230 231 232 233 234 235 236

	ret = soc_codec_reg_show(codec, buf, count, *ppos);
	if (ret >= 0) {
		if (copy_to_user(user_buf, buf, ret)) {
			kfree(buf);
			return -EFAULT;
		}
		*ppos += ret;
	}

237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
	kfree(buf);
	return ret;
}

static ssize_t codec_reg_write_file(struct file *file,
		const char __user *user_buf, size_t count, loff_t *ppos)
{
	char buf[32];
	int buf_size;
	char *start = buf;
	unsigned long reg, value;
	int step = 1;
	struct snd_soc_codec *codec = file->private_data;

	buf_size = min(count, (sizeof(buf)-1));
	if (copy_from_user(buf, user_buf, buf_size))
		return -EFAULT;
	buf[buf_size] = 0;

256 257
	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
258 259 260 261 262 263 264 265

	while (*start == ' ')
		start++;
	reg = simple_strtoul(start, &start, 16);
	while (*start == ' ')
		start++;
	if (strict_strtoul(start, 16, &value))
		return -EINVAL;
266 267 268 269

	/* Userspace has been fiddling around behind the kernel's back */
	add_taint(TAINT_USER);

270
	snd_soc_write(codec, reg, value);
271 272 273 274 275 276 277
	return buf_size;
}

static const struct file_operations codec_reg_fops = {
	.open = codec_reg_open_file,
	.read = codec_reg_read_file,
	.write = codec_reg_write_file,
278
	.llseek = default_llseek,
279 280 281 282
};

static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
283 284 285 286
	struct dentry *debugfs_card_root = codec->card->debugfs_card_root;

	codec->debugfs_codec_root = debugfs_create_dir(codec->name,
						       debugfs_card_root);
287 288 289 290 291 292
	if (!codec->debugfs_codec_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create codec debugfs directory\n");
		return;
	}

293 294 295 296 297
	debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
			    &codec->cache_sync);
	debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
			    &codec->cache_only);

298 299 300 301 302 303 304
	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
						 codec->debugfs_codec_root,
						 codec, &codec_reg_fops);
	if (!codec->debugfs_reg)
		printk(KERN_WARNING
		       "ASoC: Failed to create codec register debugfs file\n");

L
Liam Girdwood 已提交
305
	codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
306
						 codec->debugfs_codec_root);
L
Liam Girdwood 已提交
307
	if (!codec->dapm.debugfs_dapm)
308 309 310
		printk(KERN_WARNING
		       "Failed to create DAPM debugfs directory\n");

L
Liam Girdwood 已提交
311
	snd_soc_dapm_debugfs_init(&codec->dapm);
312 313 314 315 316 317 318
}

static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
	debugfs_remove_recursive(codec->debugfs_codec_root);
}

319 320 321 322
static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
				    size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
323
	ssize_t len, ret = 0;
324 325 326 327 328
	struct snd_soc_codec *codec;

	if (!buf)
		return -ENOMEM;

329 330 331 332 333 334 335 336 337 338
	list_for_each_entry(codec, &codec_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
			       codec->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
339 340 341 342 343 344 345 346 347 348 349 350 351 352

	if (ret >= 0)
		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);

	kfree(buf);

	return ret;
}

static const struct file_operations codec_list_fops = {
	.read = codec_list_read_file,
	.llseek = default_llseek,/* read accesses f_pos */
};

M
Mark Brown 已提交
353 354 355 356
static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
				  size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
357
	ssize_t len, ret = 0;
M
Mark Brown 已提交
358 359 360 361 362
	struct snd_soc_dai *dai;

	if (!buf)
		return -ENOMEM;

363 364 365 366 367 368 369 370 371
	list_for_each_entry(dai, &dai_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
M
Mark Brown 已提交
372

373
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
M
Mark Brown 已提交
374 375 376 377 378 379 380 381 382 383 384

	kfree(buf);

	return ret;
}

static const struct file_operations dai_list_fops = {
	.read = dai_list_read_file,
	.llseek = default_llseek,/* read accesses f_pos */
};

385 386 387 388 389
static ssize_t platform_list_read_file(struct file *file,
				       char __user *user_buf,
				       size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
390
	ssize_t len, ret = 0;
391 392 393 394 395
	struct snd_soc_platform *platform;

	if (!buf)
		return -ENOMEM;

396 397 398 399 400 401 402 403 404 405
	list_for_each_entry(platform, &platform_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
			       platform->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
406

407
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
408 409 410 411 412 413 414 415 416 417 418

	kfree(buf);

	return ret;
}

static const struct file_operations platform_list_fops = {
	.read = platform_list_read_file,
	.llseek = default_llseek,/* read accesses f_pos */
};

419 420 421
static void soc_init_card_debugfs(struct snd_soc_card *card)
{
	card->debugfs_card_root = debugfs_create_dir(card->name,
422
						     snd_soc_debugfs_root);
423
	if (!card->debugfs_card_root) {
424 425
		dev_warn(card->dev,
			 "ASoC: Failed to create codec debugfs directory\n");
426 427 428 429 430 431 432 433 434
		return;
	}

	card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
						    card->debugfs_card_root,
						    &card->pop_time);
	if (!card->debugfs_pop_time)
		dev_warn(card->dev,
		       "Failed to create pop time debugfs file\n");
435 436 437 438 439 440 441
}

static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
{
	debugfs_remove_recursive(card->debugfs_card_root);
}

442 443 444 445 446 447 448 449 450
#else

static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
}

static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
}
451 452 453 454 455 456 457 458

static inline void soc_init_card_debugfs(struct snd_soc_card *card)
{
}

static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
{
}
459 460
#endif

F
Frank Mandarino 已提交
461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
#ifdef CONFIG_SND_SOC_AC97_BUS
/* unregister ac97 codec */
static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
{
	if (codec->ac97->dev.bus)
		device_unregister(&codec->ac97->dev);
	return 0;
}

/* stop no dev release warning */
static void soc_ac97_device_release(struct device *dev){}

/* register ac97 codec to bus */
static int soc_ac97_dev_register(struct snd_soc_codec *codec)
{
	int err;

	codec->ac97->dev.bus = &ac97_bus_type;
479
	codec->ac97->dev.parent = codec->card->dev;
F
Frank Mandarino 已提交
480 481
	codec->ac97->dev.release = soc_ac97_device_release;

482
	dev_set_name(&codec->ac97->dev, "%d-%d:%s",
483
		     codec->card->snd_card->number, 0, codec->name);
F
Frank Mandarino 已提交
484 485 486 487 488 489 490 491 492 493
	err = device_register(&codec->ac97->dev);
	if (err < 0) {
		snd_printk(KERN_ERR "Can't register ac97 bus\n");
		codec->ac97->dev.bus = NULL;
		return err;
	}
	return 0;
}
#endif

494 495 496
static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
497 498
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
499 500
	int ret;

501 502 503 504 505
	if (!codec_dai->driver->symmetric_rates &&
	    !cpu_dai->driver->symmetric_rates &&
	    !rtd->dai_link->symmetric_rates)
		return 0;

506 507 508 509 510 511 512 513 514 515
	/* This can happen if multiple streams are starting simultaneously -
	 * the second can need to get its constraints before the first has
	 * picked a rate.  Complain and allow the application to carry on.
	 */
	if (!rtd->rate) {
		dev_warn(&rtd->dev,
			 "Not enforcing symmetric_rates due to race\n");
		return 0;
	}

516 517 518 519 520 521 522 523 524
	dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);

	ret = snd_pcm_hw_constraint_minmax(substream->runtime,
					   SNDRV_PCM_HW_PARAM_RATE,
					   rtd->rate, rtd->rate);
	if (ret < 0) {
		dev_err(&rtd->dev,
			"Unable to apply rate symmetry constraint: %d\n", ret);
		return ret;
525 526 527 528 529
	}

	return 0;
}

F
Frank Mandarino 已提交
530 531 532 533 534 535 536 537 538
/*
 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 * then initialized and any private data can be allocated. This also calls
 * startup for the cpu DAI, platform, machine and codec DAI.
 */
static int soc_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
539 540 541 542 543
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
	struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
F
Frank Mandarino 已提交
544 545 546 547 548
	int ret = 0;

	mutex_lock(&pcm_mutex);

	/* startup the audio subsystem */
549 550
	if (cpu_dai->driver->ops->startup) {
		ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
F
Frank Mandarino 已提交
551 552
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open interface %s\n",
553
				cpu_dai->name);
F
Frank Mandarino 已提交
554 555 556 557
			goto out;
		}
	}

558
	if (platform->driver->ops && platform->driver->ops->open) {
559
		ret = platform->driver->ops->open(substream);
F
Frank Mandarino 已提交
560 561 562 563 564 565
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
			goto platform_err;
		}
	}

566 567
	if (codec_dai->driver->ops->startup) {
		ret = codec_dai->driver->ops->startup(substream, codec_dai);
F
Frank Mandarino 已提交
568
		if (ret < 0) {
569 570 571
			printk(KERN_ERR "asoc: can't open codec %s\n",
				codec_dai->name);
			goto codec_dai_err;
F
Frank Mandarino 已提交
572 573 574
		}
	}

575 576
	if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
		ret = rtd->dai_link->ops->startup(substream);
F
Frank Mandarino 已提交
577
		if (ret < 0) {
578
			printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
579
			goto machine_err;
F
Frank Mandarino 已提交
580 581 582
		}
	}

M
Mark Brown 已提交
583
	/* Check that the codec and cpu DAIs are compatible */
F
Frank Mandarino 已提交
584 585
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
586 587
			max(codec_dai_drv->playback.rate_min,
			    cpu_dai_drv->playback.rate_min);
F
Frank Mandarino 已提交
588
		runtime->hw.rate_max =
589 590
			min(codec_dai_drv->playback.rate_max,
			    cpu_dai_drv->playback.rate_max);
F
Frank Mandarino 已提交
591
		runtime->hw.channels_min =
592 593
			max(codec_dai_drv->playback.channels_min,
				cpu_dai_drv->playback.channels_min);
F
Frank Mandarino 已提交
594
		runtime->hw.channels_max =
595 596
			min(codec_dai_drv->playback.channels_max,
				cpu_dai_drv->playback.channels_max);
597
		runtime->hw.formats =
598
			codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
599
		runtime->hw.rates =
600 601
			codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
		if (codec_dai_drv->playback.rates
602
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
603 604
			runtime->hw.rates |= cpu_dai_drv->playback.rates;
		if (cpu_dai_drv->playback.rates
605
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
606
			runtime->hw.rates |= codec_dai_drv->playback.rates;
F
Frank Mandarino 已提交
607 608
	} else {
		runtime->hw.rate_min =
609 610
			max(codec_dai_drv->capture.rate_min,
			    cpu_dai_drv->capture.rate_min);
F
Frank Mandarino 已提交
611
		runtime->hw.rate_max =
612 613
			min(codec_dai_drv->capture.rate_max,
			    cpu_dai_drv->capture.rate_max);
F
Frank Mandarino 已提交
614
		runtime->hw.channels_min =
615 616
			max(codec_dai_drv->capture.channels_min,
				cpu_dai_drv->capture.channels_min);
F
Frank Mandarino 已提交
617
		runtime->hw.channels_max =
618 619
			min(codec_dai_drv->capture.channels_max,
				cpu_dai_drv->capture.channels_max);
620
		runtime->hw.formats =
621
			codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
622
		runtime->hw.rates =
623 624
			codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
		if (codec_dai_drv->capture.rates
625
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
626 627
			runtime->hw.rates |= cpu_dai_drv->capture.rates;
		if (cpu_dai_drv->capture.rates
628
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
629
			runtime->hw.rates |= codec_dai_drv->capture.rates;
F
Frank Mandarino 已提交
630 631
	}

L
Lu Guanqun 已提交
632
	ret = -EINVAL;
F
Frank Mandarino 已提交
633 634 635
	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
636
			codec_dai->name, cpu_dai->name);
637
		goto config_err;
F
Frank Mandarino 已提交
638 639 640
	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
641
			codec_dai->name, cpu_dai->name);
642
		goto config_err;
F
Frank Mandarino 已提交
643
	}
644 645
	if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
	    runtime->hw.channels_min > runtime->hw.channels_max) {
F
Frank Mandarino 已提交
646
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
647
				codec_dai->name, cpu_dai->name);
648
		goto config_err;
F
Frank Mandarino 已提交
649 650
	}

651 652 653 654
	/* Symmetry only applies if we've already got an active stream. */
	if (cpu_dai->active || codec_dai->active) {
		ret = soc_pcm_apply_symmetry(substream);
		if (ret != 0)
655
			goto config_err;
656 657
	}

658 659
	pr_debug("asoc: %s <-> %s info:\n",
			codec_dai->name, cpu_dai->name);
660 661 662 663 664
	pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
	pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
		 runtime->hw.channels_max);
	pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
		 runtime->hw.rate_max);
F
Frank Mandarino 已提交
665

666
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
667 668
		cpu_dai->playback_active++;
		codec_dai->playback_active++;
669
	} else {
670 671
		cpu_dai->capture_active++;
		codec_dai->capture_active++;
672 673 674
	}
	cpu_dai->active++;
	codec_dai->active++;
675
	rtd->codec->active++;
F
Frank Mandarino 已提交
676 677 678
	mutex_unlock(&pcm_mutex);
	return 0;

679
config_err:
680 681
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
682

683
machine_err:
684 685
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
686

687
codec_dai_err:
688
	if (platform->driver->ops && platform->driver->ops->close)
689
		platform->driver->ops->close(substream);
F
Frank Mandarino 已提交
690 691

platform_err:
692 693
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
694 695 696 697 698 699
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
700
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
701 702 703
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
704
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
705
{
706 707 708
	struct snd_soc_pcm_runtime *rtd =
			container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
709 710

	mutex_lock(&pcm_mutex);
711 712 713 714 715 716 717 718 719 720 721 722

	pr_debug("pop wq checking: %s status: %s waiting: %s\n",
		 codec_dai->driver->playback.stream_name,
		 codec_dai->playback_active ? "active" : "inactive",
		 codec_dai->pop_wait ? "yes" : "no");

	/* are we waiting on this codec DAI stream */
	if (codec_dai->pop_wait == 1) {
		codec_dai->pop_wait = 0;
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->playback.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
723
	}
724

F
Frank Mandarino 已提交
725 726 727 728 729 730 731 732 733 734 735
	mutex_unlock(&pcm_mutex);
}

/*
 * Called by ALSA when a PCM substream is closed. Private data can be
 * freed here. The cpu DAI, codec DAI, machine and platform are also
 * shutdown.
 */
static int soc_codec_close(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
736 737 738 739
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
740 741 742

	mutex_lock(&pcm_mutex);

743
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
744 745
		cpu_dai->playback_active--;
		codec_dai->playback_active--;
746
	} else {
747 748
		cpu_dai->capture_active--;
		codec_dai->capture_active--;
F
Frank Mandarino 已提交
749
	}
750 751 752

	cpu_dai->active--;
	codec_dai->active--;
F
Frank Mandarino 已提交
753 754
	codec->active--;

755 756 757 758 759 760
	/* Muting the DAC suppresses artifacts caused during digital
	 * shutdown, for example from stopping clocks.
	 */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		snd_soc_dai_digital_mute(codec_dai, 1);

761 762
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
763

764 765
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
766

767 768
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
769

770
	if (platform->driver->ops && platform->driver->ops->close)
771 772
		platform->driver->ops->close(substream);
	cpu_dai->runtime = NULL;
F
Frank Mandarino 已提交
773 774 775

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
776
		codec_dai->pop_wait = 1;
777 778
		schedule_delayed_work(&rtd->delayed_work,
			msecs_to_jiffies(rtd->pmdown_time));
F
Frank Mandarino 已提交
779 780
	} else {
		/* capture streams can be powered down now */
781 782
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->capture.stream_name,
783
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
784 785 786 787 788 789 790 791 792 793 794 795 796 797
	}

	mutex_unlock(&pcm_mutex);
	return 0;
}

/*
 * Called by ALSA when the PCM substream is prepared, can set format, sample
 * rate, etc.  This function is non atomic and can be called multiple times,
 * it can refer to the runtime info.
 */
static int soc_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
798 799 800
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
801 802 803
	int ret = 0;

	mutex_lock(&pcm_mutex);
804

805 806
	if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
		ret = rtd->dai_link->ops->prepare(substream);
807 808 809 810 811 812
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine prepare error\n");
			goto out;
		}
	}

813
	if (platform->driver->ops && platform->driver->ops->prepare) {
814
		ret = platform->driver->ops->prepare(substream);
815 816
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
817
			goto out;
818
		}
F
Frank Mandarino 已提交
819 820
	}

821 822
	if (codec_dai->driver->ops->prepare) {
		ret = codec_dai->driver->ops->prepare(substream, codec_dai);
823 824
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
825
			goto out;
826
		}
F
Frank Mandarino 已提交
827 828
	}

829 830
	if (cpu_dai->driver->ops->prepare) {
		ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
831 832 833 834 835
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
836

837 838 839 840
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
841
		cancel_delayed_work(&rtd->delayed_work);
842
	}
F
Frank Mandarino 已提交
843

844
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
845 846
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->playback.stream_name,
847 848
					  SND_SOC_DAPM_STREAM_START);
	else
849 850
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->capture.stream_name,
851
					  SND_SOC_DAPM_STREAM_START);
852

853
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
854 855 856 857 858 859 860 861 862 863 864 865 866 867 868

out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
 * Called by ALSA when the hardware params are set by application. This
 * function can also be called multiple times and can allocate buffers
 * (using snd_pcm_lib_* ). It's non-atomic.
 */
static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
869 870 871
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
872 873 874 875
	int ret = 0;

	mutex_lock(&pcm_mutex);

876 877
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
		ret = rtd->dai_link->ops->hw_params(substream, params);
878 879
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
Frank Mandarino 已提交
880
			goto out;
881
		}
F
Frank Mandarino 已提交
882 883
	}

884 885
	if (codec_dai->driver->ops->hw_params) {
		ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
886 887
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
888 889
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
890 891 892
		}
	}

893 894
	if (cpu_dai->driver->ops->hw_params) {
		ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
895
		if (ret < 0) {
896
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
897
				cpu_dai->name);
F
Frank Mandarino 已提交
898 899 900 901
			goto interface_err;
		}
	}

902
	if (platform->driver->ops && platform->driver->ops->hw_params) {
903
		ret = platform->driver->ops->hw_params(substream, params);
F
Frank Mandarino 已提交
904
		if (ret < 0) {
905
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
906 907 908 909 910
				platform->name);
			goto platform_err;
		}
	}

911
	rtd->rate = params_rate(params);
912

F
Frank Mandarino 已提交
913 914 915 916 917
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
918 919
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
920 921

interface_err:
922 923
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
924 925

codec_err:
926 927
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
928 929 930 931 932 933

	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
M
Mark Brown 已提交
934
 * Frees resources allocated by hw_params, can be called multiple times
F
Frank Mandarino 已提交
935 936 937 938
 */
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
939 940 941 942
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
943 944 945 946

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
947 948
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
949 950

	/* free any machine hw params */
951 952
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
953 954

	/* free any DMA resources */
955
	if (platform->driver->ops && platform->driver->ops->hw_free)
956
		platform->driver->ops->hw_free(substream);
F
Frank Mandarino 已提交
957

M
Mark Brown 已提交
958
	/* now free hw params for the DAIs  */
959 960
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
961

962 963
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
964 965 966 967 968 969 970 971

	mutex_unlock(&pcm_mutex);
	return 0;
}

static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
972 973 974
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
975 976
	int ret;

977 978
	if (codec_dai->driver->ops->trigger) {
		ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
979 980 981 982
		if (ret < 0)
			return ret;
	}

983
	if (platform->driver->ops && platform->driver->ops->trigger) {
984
		ret = platform->driver->ops->trigger(substream, cmd);
F
Frank Mandarino 已提交
985 986 987 988
		if (ret < 0)
			return ret;
	}

989 990
	if (cpu_dai->driver->ops->trigger) {
		ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
991 992 993 994 995 996
		if (ret < 0)
			return ret;
	}
	return 0;
}

997 998
/*
 * soc level wrapper for pointer callback
999 1000
 * If cpu_dai, codec_dai, platform driver has the delay callback, than
 * the runtime->delay will be updated accordingly.
1001 1002 1003 1004
 */
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
1005 1006 1007
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
1008
	struct snd_pcm_runtime *runtime = substream->runtime;
1009
	snd_pcm_uframes_t offset = 0;
1010
	snd_pcm_sframes_t delay = 0;
1011

1012
	if (platform->driver->ops && platform->driver->ops->pointer)
1013
		offset = platform->driver->ops->pointer(substream);
1014

1015 1016
	if (cpu_dai->driver->ops->delay)
		delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1017

1018 1019
	if (codec_dai->driver->ops->delay)
		delay += codec_dai->driver->ops->delay(substream, codec_dai);
1020

1021 1022
	if (platform->driver->delay)
		delay += platform->driver->delay(substream, codec_dai);
1023 1024 1025

	runtime->delay = delay;

1026 1027 1028
	return offset;
}

F
Frank Mandarino 已提交
1029 1030 1031 1032 1033 1034 1035 1036
/* ASoC PCM operations */
static struct snd_pcm_ops soc_pcm_ops = {
	.open		= soc_pcm_open,
	.close		= soc_codec_close,
	.hw_params	= soc_pcm_hw_params,
	.hw_free	= soc_pcm_hw_free,
	.prepare	= soc_pcm_prepare,
	.trigger	= soc_pcm_trigger,
1037
	.pointer	= soc_pcm_pointer,
F
Frank Mandarino 已提交
1038 1039
};

1040
#ifdef CONFIG_PM_SLEEP
F
Frank Mandarino 已提交
1041
/* powers down audio subsystem for suspend */
1042
int snd_soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
1043
{
1044
	struct snd_soc_card *card = dev_get_drvdata(dev);
1045
	struct snd_soc_codec *codec;
F
Frank Mandarino 已提交
1046 1047
	int i;

1048 1049 1050
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
1051
	if (list_empty(&card->codec_dev_list))
1052 1053
		return 0;

1054 1055 1056
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
1057 1058 1059
	snd_power_lock(card->snd_card);
	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(card->snd_card);
1060 1061

	/* we're going to block userspace touching us until resume completes */
1062
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1063

M
Mark Brown 已提交
1064
	/* mute any active DACs */
1065 1066 1067
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *dai = card->rtd[i].codec_dai;
		struct snd_soc_dai_driver *drv = dai->driver;
1068

1069
		if (card->rtd[i].dai_link->ignore_suspend)
1070 1071
			continue;

1072 1073
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
1074 1075
	}

1076
	/* suspend all pcms */
1077 1078
	for (i = 0; i < card->num_rtd; i++) {
		if (card->rtd[i].dai_link->ignore_suspend)
1079 1080
			continue;

1081
		snd_pcm_suspend_all(card->rtd[i].pcm);
1082
	}
1083

1084
	if (card->suspend_pre)
1085
		card->suspend_pre(card);
F
Frank Mandarino 已提交
1086

1087 1088 1089
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_platform *platform = card->rtd[i].platform;
1090

1091
		if (card->rtd[i].dai_link->ignore_suspend)
1092 1093
			continue;

1094 1095 1096 1097 1098 1099
		if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
		if (platform->driver->suspend && !platform->suspended) {
			platform->driver->suspend(cpu_dai);
			platform->suspended = 1;
		}
F
Frank Mandarino 已提交
1100 1101 1102
	}

	/* close any waiting streams and save state */
1103
	for (i = 0; i < card->num_rtd; i++) {
1104
		flush_delayed_work_sync(&card->rtd[i].delayed_work);
L
Liam Girdwood 已提交
1105
		card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1106
	}
F
Frank Mandarino 已提交
1107

1108 1109
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1110

1111
		if (card->rtd[i].dai_link->ignore_suspend)
1112 1113
			continue;

1114 1115
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1116
				SND_SOC_DAPM_STREAM_SUSPEND);
1117 1118 1119

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1120 1121 1122
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

1123
	/* suspend all CODECs */
1124
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1125 1126 1127
		/* If there are paths active then the CODEC will be held with
		 * bias _ON and should not be suspended. */
		if (!codec->suspended && codec->driver->suspend) {
L
Liam Girdwood 已提交
1128
			switch (codec->dapm.bias_level) {
1129 1130 1131 1132 1133 1134 1135 1136 1137
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->suspend(codec, PMSG_SUSPEND);
				codec->suspended = 1;
				break;
			default:
				dev_dbg(codec->dev, "CODEC is on over suspend\n");
				break;
			}
1138 1139
		}
	}
F
Frank Mandarino 已提交
1140

1141 1142
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1143

1144
		if (card->rtd[i].dai_link->ignore_suspend)
1145 1146
			continue;

1147 1148
		if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
F
Frank Mandarino 已提交
1149 1150
	}

1151
	if (card->suspend_post)
1152
		card->suspend_post(card);
F
Frank Mandarino 已提交
1153 1154 1155

	return 0;
}
1156
EXPORT_SYMBOL_GPL(snd_soc_suspend);
F
Frank Mandarino 已提交
1157

1158 1159 1160 1161
/* deferred resume work, so resume can complete before we finished
 * setting our codec back up, which can be very slow on I2C
 */
static void soc_resume_deferred(struct work_struct *work)
F
Frank Mandarino 已提交
1162
{
1163 1164
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
1165
	struct snd_soc_codec *codec;
F
Frank Mandarino 已提交
1166 1167
	int i;

1168 1169 1170 1171
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

1172
	dev_dbg(card->dev, "starting resume work\n");
1173

1174
	/* Bring us up into D2 so that DAPM starts enabling things */
1175
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1176

1177
	if (card->resume_pre)
1178
		card->resume_pre(card);
F
Frank Mandarino 已提交
1179

1180 1181 1182
	/* resume AC97 DAIs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1183

1184
		if (card->rtd[i].dai_link->ignore_suspend)
1185 1186
			continue;

1187 1188 1189 1190
		if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
	}

1191
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1192 1193 1194 1195 1196
		/* If the CODEC was idle over suspend then it will have been
		 * left with bias OFF or STANDBY and suspended so we must now
		 * resume.  Otherwise the suspend was suppressed.
		 */
		if (codec->driver->resume && codec->suspended) {
L
Liam Girdwood 已提交
1197
			switch (codec->dapm.bias_level) {
1198 1199 1200 1201 1202 1203 1204 1205 1206
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->resume(codec);
				codec->suspended = 0;
				break;
			default:
				dev_dbg(codec->dev, "CODEC was on over suspend\n");
				break;
			}
1207 1208
		}
	}
F
Frank Mandarino 已提交
1209

1210 1211
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1212

1213
		if (card->rtd[i].dai_link->ignore_suspend)
1214 1215
			continue;

1216 1217
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1218
				SND_SOC_DAPM_STREAM_RESUME);
1219 1220 1221

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1222 1223 1224
				SND_SOC_DAPM_STREAM_RESUME);
	}

1225
	/* unmute any active DACs */
1226 1227 1228
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *dai = card->rtd[i].codec_dai;
		struct snd_soc_dai_driver *drv = dai->driver;
1229

1230
		if (card->rtd[i].dai_link->ignore_suspend)
1231 1232
			continue;

1233 1234
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
1235 1236
	}

1237 1238 1239
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_platform *platform = card->rtd[i].platform;
1240

1241
		if (card->rtd[i].dai_link->ignore_suspend)
1242 1243
			continue;

1244 1245 1246 1247 1248 1249
		if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
		if (platform->driver->resume && platform->suspended) {
			platform->driver->resume(cpu_dai);
			platform->suspended = 0;
		}
F
Frank Mandarino 已提交
1250 1251
	}

1252
	if (card->resume_post)
1253
		card->resume_post(card);
F
Frank Mandarino 已提交
1254

1255
	dev_dbg(card->dev, "resume work completed\n");
1256 1257

	/* userspace can access us now we are back as we were before */
1258
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1259 1260 1261
}

/* powers up audio subsystem after a suspend */
1262
int snd_soc_resume(struct device *dev)
1263
{
1264
	struct snd_soc_card *card = dev_get_drvdata(dev);
1265
	int i;
1266

1267 1268 1269 1270 1271
	/* AC97 devices might have other drivers hanging off them so
	 * need to resume immediately.  Other drivers don't have that
	 * problem and may take a substantial amount of time to resume
	 * due to I/O costs and anti-pop so handle them out of line.
	 */
1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		if (cpu_dai->driver->ac97_control) {
			dev_dbg(dev, "Resuming AC97 immediately\n");
			soc_resume_deferred(&card->deferred_resume_work);
		} else {
			dev_dbg(dev, "Scheduling resume work\n");
			if (!schedule_work(&card->deferred_resume_work))
				dev_err(dev, "resume work item may be lost\n");
		}
1282
	}
1283

F
Frank Mandarino 已提交
1284 1285
	return 0;
}
1286
EXPORT_SYMBOL_GPL(snd_soc_resume);
F
Frank Mandarino 已提交
1287
#else
1288 1289
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
F
Frank Mandarino 已提交
1290 1291
#endif

1292 1293 1294
static struct snd_soc_dai_ops null_dai_ops = {
};

1295
static int soc_bind_dai_link(struct snd_soc_card *card, int num)
F
Frank Mandarino 已提交
1296
{
1297 1298
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
M
Mark Brown 已提交
1299
	struct snd_soc_codec *codec;
1300
	struct snd_soc_platform *platform;
1301
	struct snd_soc_dai *codec_dai, *cpu_dai;
1302
	const char *platform_name;
1303

1304 1305 1306
	if (rtd->complete)
		return 1;
	dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1307

1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
	/* do we already have the CPU DAI for this link ? */
	if (rtd->cpu_dai) {
		goto find_codec;
	}
	/* no, then find CPU DAI from registered DAIs*/
	list_for_each_entry(cpu_dai, &dai_list, list) {
		if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {

			if (!try_module_get(cpu_dai->dev->driver->owner))
				return -ENODEV;

			rtd->cpu_dai = cpu_dai;
			goto find_codec;
1321 1322
		}
	}
1323 1324
	dev_dbg(card->dev, "CPU DAI %s not registered\n",
			dai_link->cpu_dai_name);
1325

1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343
find_codec:
	/* do we already have the CODEC for this link ? */
	if (rtd->codec) {
		goto find_platform;
	}

	/* no, then find CODEC from registered CODECs*/
	list_for_each_entry(codec, &codec_list, list) {
		if (!strcmp(codec->name, dai_link->codec_name)) {
			rtd->codec = codec;

			/* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
			list_for_each_entry(codec_dai, &dai_list, list) {
				if (codec->dev == codec_dai->dev &&
						!strcmp(codec_dai->name, dai_link->codec_dai_name)) {
					rtd->codec_dai = codec_dai;
					goto find_platform;
				}
1344
			}
1345 1346 1347 1348
			dev_dbg(card->dev, "CODEC DAI %s not registered\n",
					dai_link->codec_dai_name);

			goto find_platform;
1349
		}
1350 1351 1352
	}
	dev_dbg(card->dev, "CODEC %s not registered\n",
			dai_link->codec_name);
1353

1354
find_platform:
1355 1356
	/* do we need a platform? */
	if (rtd->platform)
1357
		goto out;
1358 1359 1360 1361 1362 1363 1364

	/* if there's no platform we match on the empty platform */
	platform_name = dai_link->platform_name;
	if (!platform_name)
		platform_name = "snd-soc-dummy";

	/* no, then find one from the set of registered platforms */
1365
	list_for_each_entry(platform, &platform_list, list) {
1366
		if (!strcmp(platform->name, platform_name)) {
1367 1368 1369
			rtd->platform = platform;
			goto out;
		}
1370 1371
	}

1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
	dev_dbg(card->dev, "platform %s not registered\n",
			dai_link->platform_name);
	return 0;

out:
	/* mark rtd as complete if we found all 4 of our client devices */
	if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
		rtd->complete = 1;
		card->num_rtd++;
	}
	return 1;
}

1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405
static void soc_remove_codec(struct snd_soc_codec *codec)
{
	int err;

	if (codec->driver->remove) {
		err = codec->driver->remove(codec);
		if (err < 0)
			dev_err(codec->dev,
				"asoc: failed to remove %s: %d\n",
				codec->name, err);
	}

	/* Make sure all DAPM widgets are freed */
	snd_soc_dapm_free(&codec->dapm);

	soc_cleanup_codec_debugfs(codec);
	codec->probed = 0;
	list_del(&codec->card_list);
	module_put(codec->dev->driver->owner);
}

1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
static void soc_remove_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int err;

	/* unregister the rtd device */
	if (rtd->dev_registered) {
		device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1417
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1418 1419 1420 1421 1422 1423 1424 1425 1426 1427
		device_unregister(&rtd->dev);
		rtd->dev_registered = 0;
	}

	/* remove the CODEC DAI */
	if (codec_dai && codec_dai->probed) {
		if (codec_dai->driver->remove) {
			err = codec_dai->driver->remove(codec_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1428
		}
1429 1430 1431
		codec_dai->probed = 0;
		list_del(&codec_dai->card_list);
	}
1432

1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443
	/* remove the platform */
	if (platform && platform->probed) {
		if (platform->driver->remove) {
			err = platform->driver->remove(platform);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
		}
		platform->probed = 0;
		list_del(&platform->card_list);
		module_put(platform->dev->driver->owner);
	}
1444

1445
	/* remove the CODEC */
1446 1447
	if (codec && codec->probed)
		soc_remove_codec(codec);
F
Frank Mandarino 已提交
1448

1449 1450 1451 1452 1453 1454
	/* remove the cpu_dai */
	if (cpu_dai && cpu_dai->probed) {
		if (cpu_dai->driver->remove) {
			err = cpu_dai->driver->remove(cpu_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
F
Frank Mandarino 已提交
1455
		}
1456 1457 1458
		cpu_dai->probed = 0;
		list_del(&cpu_dai->card_list);
		module_put(cpu_dai->dev->driver->owner);
F
Frank Mandarino 已提交
1459
	}
1460
}
F
Frank Mandarino 已提交
1461

1462 1463 1464 1465 1466 1467 1468 1469 1470 1471
static void soc_remove_dai_links(struct snd_soc_card *card)
{
	int i;

	for (i = 0; i < card->num_rtd; i++)
		soc_remove_dai_link(card, i);

	card->num_rtd = 0;
}

1472 1473 1474 1475 1476
static void soc_set_name_prefix(struct snd_soc_card *card,
				struct snd_soc_codec *codec)
{
	int i;

1477
	if (card->codec_conf == NULL)
1478 1479
		return;

1480 1481
	for (i = 0; i < card->num_configs; i++) {
		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1482 1483 1484 1485 1486 1487 1488
		if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
			codec->name_prefix = map->name_prefix;
			break;
		}
	}
}

1489 1490 1491 1492
static int soc_probe_codec(struct snd_soc_card *card,
			   struct snd_soc_codec *codec)
{
	int ret = 0;
1493
	const struct snd_soc_codec_driver *driver = codec->driver;
1494 1495 1496 1497 1498

	codec->card = card;
	codec->dapm.card = card;
	soc_set_name_prefix(card, codec);

1499 1500 1501
	if (!try_module_get(codec->dev->driver->owner))
		return -ENODEV;

1502 1503
	if (driver->probe) {
		ret = driver->probe(codec);
1504 1505 1506 1507
		if (ret < 0) {
			dev_err(codec->dev,
				"asoc: failed to probe CODEC %s: %d\n",
				codec->name, ret);
1508
			goto err_probe;
1509 1510 1511
		}
	}

1512 1513 1514
	if (driver->controls)
		snd_soc_add_controls(codec, driver->controls,
				     driver->num_controls);
1515 1516 1517 1518 1519 1520 1521
	if (driver->dapm_widgets)
		snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
					  driver->num_dapm_widgets);
	if (driver->dapm_routes)
		snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
					driver->num_dapm_routes);

1522 1523 1524 1525 1526
	soc_init_codec_debugfs(codec);

	/* mark codec as probed and add to card codec list */
	codec->probed = 1;
	list_add(&codec->card_list, &card->codec_dev_list);
1527
	list_add(&codec->dapm.list, &card->dapm_list);
1528

1529 1530 1531 1532 1533
	return 0;

err_probe:
	module_put(codec->dev->driver->owner);

1534 1535 1536
	return ret;
}

1537 1538
static void rtd_release(struct device *dev) {}

1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557
static int soc_post_component_init(struct snd_soc_card *card,
				   struct snd_soc_codec *codec,
				   int num, int dailess)
{
	struct snd_soc_dai_link *dai_link = NULL;
	struct snd_soc_aux_dev *aux_dev = NULL;
	struct snd_soc_pcm_runtime *rtd;
	const char *temp, *name;
	int ret = 0;

	if (!dailess) {
		dai_link = &card->dai_link[num];
		rtd = &card->rtd[num];
		name = dai_link->name;
	} else {
		aux_dev = &card->aux_dev[num];
		rtd = &card->rtd_aux[num];
		name = aux_dev->name;
	}
1558
	rtd->card = card;
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606

	/* machine controls, routes and widgets are not prefixed */
	temp = codec->name_prefix;
	codec->name_prefix = NULL;

	/* do machine specific initialization */
	if (!dailess && dai_link->init)
		ret = dai_link->init(rtd);
	else if (dailess && aux_dev->init)
		ret = aux_dev->init(&codec->dapm);
	if (ret < 0) {
		dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
		return ret;
	}
	codec->name_prefix = temp;

	/* Make sure all DAPM widgets are instantiated */
	snd_soc_dapm_new_widgets(&codec->dapm);

	/* register the rtd device */
	rtd->codec = codec;
	rtd->dev.parent = card->dev;
	rtd->dev.release = rtd_release;
	rtd->dev.init_name = name;
	ret = device_register(&rtd->dev);
	if (ret < 0) {
		dev_err(card->dev,
			"asoc: failed to register runtime device: %d\n", ret);
		return ret;
	}
	rtd->dev_registered = 1;

	/* add DAPM sysfs entries for this codec */
	ret = snd_soc_dapm_sys_add(&rtd->dev);
	if (ret < 0)
		dev_err(codec->dev,
			"asoc: failed to add codec dapm sysfs entries: %d\n",
			ret);

	/* add codec sysfs entries */
	ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
	if (ret < 0)
		dev_err(codec->dev,
			"asoc: failed to add codec sysfs files: %d\n", ret);

	return 0;
}

1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639
static int soc_probe_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int ret;

	dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);

	/* config components */
	codec_dai->codec = codec;
	cpu_dai->platform = platform;
	codec_dai->card = card;
	cpu_dai->card = card;

	/* set default power off timeout */
	rtd->pmdown_time = pmdown_time;

	/* probe the cpu_dai */
	if (!cpu_dai->probed) {
		if (cpu_dai->driver->probe) {
			ret = cpu_dai->driver->probe(cpu_dai);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
						cpu_dai->name);
				return ret;
			}
		}
		cpu_dai->probed = 1;
		/* mark cpu_dai as probed and add to card cpu_dai list */
		list_add(&cpu_dai->card_list, &card->dai_dev_list);
F
Frank Mandarino 已提交
1640 1641
	}

1642 1643
	/* probe the CODEC */
	if (!codec->probed) {
1644 1645 1646
		ret = soc_probe_codec(card, codec);
		if (ret < 0)
			return ret;
F
Frank Mandarino 已提交
1647 1648
	}

1649 1650
	/* probe the platform */
	if (!platform->probed) {
1651 1652 1653
		if (!try_module_get(platform->dev->driver->owner))
			return -ENODEV;

1654 1655 1656 1657 1658
		if (platform->driver->probe) {
			ret = platform->driver->probe(platform);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe platform %s\n",
						platform->name);
1659
				module_put(platform->dev->driver->owner);
1660 1661 1662 1663 1664 1665 1666
				return ret;
			}
		}
		/* mark platform as probed and add to card platform list */
		platform->probed = 1;
		list_add(&platform->card_list, &card->platform_dev_list);
	}
1667

1668 1669 1670 1671
	/* probe the CODEC DAI */
	if (!codec_dai->probed) {
		if (codec_dai->driver->probe) {
			ret = codec_dai->driver->probe(codec_dai);
M
Mark Brown 已提交
1672
			if (ret < 0) {
1673 1674 1675
				printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
						codec_dai->name);
				return ret;
M
Mark Brown 已提交
1676 1677
			}
		}
1678 1679 1680 1681

		/* mark cpu_dai as probed and add to card cpu_dai list */
		codec_dai->probed = 1;
		list_add(&codec_dai->card_list, &card->dai_dev_list);
M
Mark Brown 已提交
1682 1683
	}

1684 1685 1686
	/* DAPM dai link stream work */
	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);

1687 1688
	ret = soc_post_component_init(card, codec, num, 0);
	if (ret)
1689
		return ret;
M
Mark Brown 已提交
1690

1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
	ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");

	/* create the pcm */
	ret = soc_new_pcm(rtd, num);
	if (ret < 0) {
		printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
		return ret;
	}

	/* add platform data for AC97 devices */
	if (rtd->codec_dai->driver->ac97_control)
		snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);

	return 0;
}

M
Mark Brown 已提交
1709
#ifdef CONFIG_SND_SOC_AC97_BUS
1710 1711 1712 1713
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
{
	int ret;

M
Mark Brown 已提交
1714 1715 1716
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
1717
	if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
		/*
		 * It is possible that the AC97 device is already registered to
		 * the device subsystem. This happens when the device is created
		 * via snd_ac97_mixer(). Currently only SoC codec that does so
		 * is the generic AC97 glue but others migh emerge.
		 *
		 * In those cases we don't try to register the device again.
		 */
		if (!rtd->codec->ac97_created)
			return 0;
1728 1729

		ret = soc_ac97_dev_register(rtd->codec);
M
Mark Brown 已提交
1730 1731
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
1732
			return ret;
M
Mark Brown 已提交
1733
		}
1734 1735

		rtd->codec->ac97_registered = 1;
M
Mark Brown 已提交
1736
	}
1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
	return 0;
}

static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
{
	if (codec->ac97_registered) {
		soc_ac97_dev_unregister(codec);
		codec->ac97_registered = 0;
	}
}
M
Mark Brown 已提交
1747 1748
#endif

1749 1750 1751 1752
static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
{
	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
	struct snd_soc_codec *codec;
1753
	int ret = -ENODEV;
1754 1755 1756 1757 1758 1759 1760 1761 1762 1763

	/* find CODEC from registered CODECs*/
	list_for_each_entry(codec, &codec_list, list) {
		if (!strcmp(codec->name, aux_dev->codec_name)) {
			if (codec->probed) {
				dev_err(codec->dev,
					"asoc: codec already probed");
				ret = -EBUSY;
				goto out;
			}
1764
			goto found;
1765 1766
		}
	}
1767 1768 1769
	/* codec not found */
	dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
	goto out;
1770

1771
found:
1772
	ret = soc_probe_codec(card, codec);
1773
	if (ret < 0)
1774
		return ret;
1775

1776
	ret = soc_post_component_init(card, codec, num, 1);
1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788

out:
	return ret;
}

static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
	struct snd_soc_codec *codec = rtd->codec;

	/* unregister the rtd device */
	if (rtd->dev_registered) {
1789
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1790 1791 1792 1793
		device_unregister(&rtd->dev);
		rtd->dev_registered = 0;
	}

1794 1795
	if (codec && codec->probed)
		soc_remove_codec(codec);
1796 1797
}

1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818
static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
				    enum snd_soc_compress_type compress_type)
{
	int ret;

	if (codec->cache_init)
		return 0;

	/* override the compress_type if necessary */
	if (compress_type && codec->compress_type != compress_type)
		codec->compress_type = compress_type;
	ret = snd_soc_cache_init(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to set cache compression type: %d\n",
			ret);
		return ret;
	}
	codec->cache_init = 1;
	return 0;
}

1819 1820
static void snd_soc_instantiate_card(struct snd_soc_card *card)
{
1821 1822 1823
	struct snd_soc_codec *codec;
	struct snd_soc_codec_conf *codec_conf;
	enum snd_soc_compress_type compress_type;
1824
	int ret, i;
M
Mark Brown 已提交
1825

1826
	mutex_lock(&card->mutex);
1827

1828 1829 1830 1831
	if (card->instantiated) {
		mutex_unlock(&card->mutex);
		return;
	}
M
Mark Brown 已提交
1832

1833 1834 1835
	/* bind DAIs */
	for (i = 0; i < card->num_links; i++)
		soc_bind_dai_link(card, i);
M
Mark Brown 已提交
1836

1837 1838 1839 1840 1841
	/* bind completed ? */
	if (card->num_rtd != card->num_links) {
		mutex_unlock(&card->mutex);
		return;
	}
1842

1843 1844 1845 1846
	/* initialize the register cache for each available codec */
	list_for_each_entry(codec, &codec_list, list) {
		if (codec->cache_init)
			continue;
1847 1848
		/* by default we don't override the compress_type */
		compress_type = 0;
1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865
		/* check to see if we need to override the compress_type */
		for (i = 0; i < card->num_configs; ++i) {
			codec_conf = &card->codec_conf[i];
			if (!strcmp(codec->name, codec_conf->dev_name)) {
				compress_type = codec_conf->compress_type;
				if (compress_type && compress_type
				    != codec->compress_type)
					break;
			}
		}
		ret = snd_soc_init_codec_cache(codec, compress_type);
		if (ret < 0) {
			mutex_unlock(&card->mutex);
			return;
		}
	}

1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876
	/* card bind complete so register a sound card */
	ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
			card->owner, 0, &card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: can't create sound card for card %s\n",
			card->name);
		mutex_unlock(&card->mutex);
		return;
	}
	card->snd_card->dev = card->dev;

M
Mark Brown 已提交
1877 1878 1879 1880 1881
	card->dapm.bias_level = SND_SOC_BIAS_OFF;
	card->dapm.dev = card->dev;
	card->dapm.card = card;
	list_add(&card->dapm.list, &card->dapm_list);

1882
#ifdef CONFIG_PM_SLEEP
1883 1884 1885
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1886

1887 1888 1889 1890
	if (card->dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
					  card->num_dapm_widgets);

1891 1892
	/* initialise the sound card only once */
	if (card->probe) {
1893
		ret = card->probe(card);
1894 1895 1896
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1897

1898 1899 1900
	for (i = 0; i < card->num_links; i++) {
		ret = soc_probe_dai_link(card, i);
		if (ret < 0) {
1901 1902
			pr_err("asoc: failed to instantiate card %s: %d\n",
			       card->name, ret);
1903 1904 1905
			goto probe_dai_err;
		}
	}
F
Frank Mandarino 已提交
1906

1907 1908 1909 1910 1911 1912 1913 1914 1915
	for (i = 0; i < card->num_aux_devs; i++) {
		ret = soc_probe_aux_dev(card, i);
		if (ret < 0) {
			pr_err("asoc: failed to add auxiliary devices %s: %d\n",
			       card->name, ret);
			goto probe_aux_dev_err;
		}
	}

1916 1917 1918 1919 1920 1921 1922 1923
	/* We should have a non-codec control add function but we don't */
	if (card->controls)
		snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
						      struct snd_soc_codec,
						      card_list),
				     card->controls,
				     card->num_controls);

1924 1925 1926 1927
	if (card->dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
					card->num_dapm_routes);

1928
#ifdef CONFIG_DEBUG_FS
M
Mark Brown 已提交
1929 1930 1931 1932 1933 1934 1935
	card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
						     card->debugfs_card_root);
	if (!card->dapm.debugfs_dapm)
		printk(KERN_WARNING
		       "Failed to create card DAPM debugfs directory\n");

	snd_soc_dapm_debugfs_init(&card->dapm);
1936
#endif
M
Mark Brown 已提交
1937

1938 1939 1940 1941 1942
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s",  card->name);
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->name);

1943 1944 1945 1946 1947 1948 1949 1950 1951
	if (card->late_probe) {
		ret = card->late_probe(card);
		if (ret < 0) {
			dev_err(card->dev, "%s late_probe() failed: %d\n",
				card->name, ret);
			goto probe_aux_dev_err;
		}
	}

1952 1953 1954
	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1955
		goto probe_aux_dev_err;
F
Frank Mandarino 已提交
1956 1957
	}

1958 1959 1960
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* register any AC97 codecs */
	for (i = 0; i < card->num_rtd; i++) {
1961 1962 1963 1964
		ret = soc_register_ac97_dai_link(&card->rtd[i]);
		if (ret < 0) {
			printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
			while (--i >= 0)
M
Mark Brown 已提交
1965
				soc_unregister_ac97_dai_link(card->rtd[i].codec);
1966
			goto probe_aux_dev_err;
1967
		}
1968
	}
1969 1970 1971 1972 1973 1974
#endif

	card->instantiated = 1;
	mutex_unlock(&card->mutex);
	return;

1975 1976 1977 1978
probe_aux_dev_err:
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);

1979
probe_dai_err:
1980
	soc_remove_dai_links(card);
1981 1982

card_probe_error:
1983
	if (card->remove)
1984
		card->remove(card);
1985 1986 1987 1988

	snd_card_free(card->snd_card);

	mutex_unlock(&card->mutex);
1989
}
F
Frank Mandarino 已提交
1990

1991
/*
1992
 * Attempt to initialise any uninitialised cards.  Must be called with
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
 * client_mutex.
 */
static void snd_soc_instantiate_cards(void)
{
	struct snd_soc_card *card;
	list_for_each_entry(card, &card_list, list)
		snd_soc_instantiate_card(card);
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
2005
	struct snd_soc_card *card = platform_get_drvdata(pdev);
2006 2007
	int ret = 0;

2008 2009 2010 2011 2012 2013 2014
	/*
	 * no card, so machine driver should be registering card
	 * we should not be here in that case so ret error
	 */
	if (!card)
		return -EINVAL;

2015 2016
	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
2017

2018 2019 2020 2021 2022 2023 2024
	ret = snd_soc_register_card(card);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to register card\n");
		return ret;
	}

	return 0;
F
Frank Mandarino 已提交
2025 2026
}

2027
static int soc_cleanup_card_resources(struct snd_soc_card *card)
F
Frank Mandarino 已提交
2028 2029 2030
{
	int i;

2031 2032 2033 2034 2035
	/* make sure any delayed work runs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
		flush_delayed_work_sync(&rtd->delayed_work);
	}
2036

2037 2038 2039
	/* remove auxiliary devices */
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);
F
Frank Mandarino 已提交
2040

2041
	/* remove and free each DAI */
2042
	soc_remove_dai_links(card);
2043

2044
	soc_cleanup_card_debugfs(card);
2045

2046 2047
	/* remove the card */
	if (card->remove)
2048
		card->remove(card);
2049

2050 2051
	snd_soc_dapm_free(&card->dapm);

2052 2053 2054 2055 2056 2057 2058 2059 2060 2061
	kfree(card->rtd);
	snd_card_free(card->snd_card);
	return 0;

}

/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
F
Frank Mandarino 已提交
2062

M
Mark Brown 已提交
2063
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
2064 2065 2066
	return 0;
}

2067
int snd_soc_poweroff(struct device *dev)
M
Mark Brown 已提交
2068
{
2069
	struct snd_soc_card *card = dev_get_drvdata(dev);
2070
	int i;
M
Mark Brown 已提交
2071 2072

	if (!card->instantiated)
M
Mark Brown 已提交
2073
		return 0;
M
Mark Brown 已提交
2074 2075 2076

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
2077 2078
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2079
		flush_delayed_work_sync(&rtd->delayed_work);
2080
	}
M
Mark Brown 已提交
2081

2082
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
2083 2084

	return 0;
M
Mark Brown 已提交
2085
}
2086
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
M
Mark Brown 已提交
2087

2088 2089 2090 2091
const struct dev_pm_ops snd_soc_pm_ops = {
	.suspend = snd_soc_suspend,
	.resume = snd_soc_resume,
	.poweroff = snd_soc_poweroff,
M
Mark Brown 已提交
2092
};
2093
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
M
Mark Brown 已提交
2094

F
Frank Mandarino 已提交
2095 2096 2097 2098
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
2099
		.owner		= THIS_MODULE,
2100
		.pm		= &snd_soc_pm_ops,
F
Frank Mandarino 已提交
2101 2102 2103 2104 2105 2106
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/* create a new pcm */
2107 2108 2109 2110 2111 2112
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
F
Frank Mandarino 已提交
2113 2114 2115 2116 2117
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	/* check client and interface hw capabilities */
2118
	snprintf(new_name, sizeof(new_name), "%s %s-%d",
2119
			rtd->dai_link->stream_name, codec_dai->name, num);
F
Frank Mandarino 已提交
2120

2121
	if (codec_dai->driver->playback.channels_min)
F
Frank Mandarino 已提交
2122
		playback = 1;
2123
	if (codec_dai->driver->capture.channels_min)
F
Frank Mandarino 已提交
2124 2125
		capture = 1;

2126 2127 2128
	dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
	ret = snd_pcm_new(rtd->card->snd_card, new_name,
			num, playback, capture, &pcm);
F
Frank Mandarino 已提交
2129
	if (ret < 0) {
2130
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
F
Frank Mandarino 已提交
2131 2132 2133
		return ret;
	}

2134
	rtd->pcm = pcm;
F
Frank Mandarino 已提交
2135
	pcm->private_data = rtd;
2136 2137 2138 2139 2140 2141 2142 2143 2144
	if (platform->driver->ops) {
		soc_pcm_ops.mmap = platform->driver->ops->mmap;
		soc_pcm_ops.pointer = platform->driver->ops->pointer;
		soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
		soc_pcm_ops.copy = platform->driver->ops->copy;
		soc_pcm_ops.silence = platform->driver->ops->silence;
		soc_pcm_ops.ack = platform->driver->ops->ack;
		soc_pcm_ops.page = platform->driver->ops->page;
	}
F
Frank Mandarino 已提交
2145 2146 2147 2148 2149 2150 2151

	if (playback)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);

	if (capture)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);

2152 2153 2154 2155 2156 2157 2158
	if (platform->driver->pcm_new) {
		ret = platform->driver->pcm_new(rtd->card->snd_card,
						codec_dai, pcm);
		if (ret < 0) {
			pr_err("asoc: platform pcm constructor failed\n");
			return ret;
		}
F
Frank Mandarino 已提交
2159 2160
	}

2161
	pcm->private_free = platform->driver->pcm_free;
F
Frank Mandarino 已提交
2162 2163 2164 2165 2166
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

2167 2168 2169 2170 2171 2172 2173 2174
/**
 * snd_soc_codec_volatile_register: Report if a register is volatile.
 *
 * @codec: CODEC to query.
 * @reg: Register to query.
 *
 * Boolean function indiciating if a CODEC register is volatile.
 */
2175 2176
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
				    unsigned int reg)
2177
{
2178 2179
	if (codec->volatile_register)
		return codec->volatile_register(codec, reg);
2180 2181 2182 2183 2184
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220
/**
 * snd_soc_codec_readable_register: Report if a register is readable.
 *
 * @codec: CODEC to query.
 * @reg: Register to query.
 *
 * Boolean function indicating if a CODEC register is readable.
 */
int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
				    unsigned int reg)
{
	if (codec->readable_register)
		return codec->readable_register(codec, reg);
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);

/**
 * snd_soc_codec_writable_register: Report if a register is writable.
 *
 * @codec: CODEC to query.
 * @reg: Register to query.
 *
 * Boolean function indicating if a CODEC register is writable.
 */
int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
				    unsigned int reg)
{
	if (codec->writable_register)
		return codec->writable_register(codec, reg);
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);

F
Frank Mandarino 已提交
2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249
/**
 * snd_soc_new_ac97_codec - initailise AC97 device
 * @codec: audio codec
 * @ops: AC97 bus operations
 * @num: AC97 codec number
 *
 * Initialises AC97 codec resources for use by ad-hoc devices only.
 */
int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
	struct snd_ac97_bus_ops *ops, int num)
{
	mutex_lock(&codec->mutex);

	codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
	if (codec->ac97 == NULL) {
		mutex_unlock(&codec->mutex);
		return -ENOMEM;
	}

	codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
	if (codec->ac97->bus == NULL) {
		kfree(codec->ac97);
		codec->ac97 = NULL;
		mutex_unlock(&codec->mutex);
		return -ENOMEM;
	}

	codec->ac97->bus->ops = ops;
	codec->ac97->num = num;
2250 2251 2252 2253 2254 2255 2256

	/*
	 * Mark the AC97 device to be created by us. This way we ensure that the
	 * device will be registered with the device subsystem later on.
	 */
	codec->ac97_created = 1;

F
Frank Mandarino 已提交
2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270
	mutex_unlock(&codec->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);

/**
 * snd_soc_free_ac97_codec - free AC97 codec device
 * @codec: audio codec
 *
 * Frees AC97 codec device resources.
 */
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&codec->mutex);
2271 2272 2273
#ifdef CONFIG_SND_SOC_AC97_BUS
	soc_unregister_ac97_dai_link(codec);
#endif
F
Frank Mandarino 已提交
2274 2275 2276
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
2277
	codec->ac97_created = 0;
F
Frank Mandarino 已提交
2278 2279 2280 2281
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

2282 2283 2284 2285
unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
{
	unsigned int ret;

2286
	ret = codec->read(codec, reg);
2287
	dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2288
	trace_snd_soc_reg_read(codec, reg, ret);
2289 2290 2291 2292 2293 2294 2295 2296 2297

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_read);

unsigned int snd_soc_write(struct snd_soc_codec *codec,
			   unsigned int reg, unsigned int val)
{
	dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2298
	trace_snd_soc_reg_write(codec, reg, val);
2299
	return codec->write(codec, reg, val);
2300 2301 2302
}
EXPORT_SYMBOL_GPL(snd_soc_write);

2303 2304 2305 2306 2307 2308 2309
unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
				    unsigned int reg, const void *data, size_t len)
{
	return codec->bulk_write_raw(codec, reg, data, len);
}
EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);

F
Frank Mandarino 已提交
2310 2311 2312 2313 2314 2315 2316 2317 2318
/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
2319
 * Returns 1 for change, 0 for no change, or negative error code.
F
Frank Mandarino 已提交
2320 2321
 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2322
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
2323 2324
{
	int change;
2325
	unsigned int old, new;
2326 2327 2328 2329 2330
	int ret;

	ret = snd_soc_read(codec, reg);
	if (ret < 0)
		return ret;
F
Frank Mandarino 已提交
2331

2332
	old = ret;
F
Frank Mandarino 已提交
2333 2334
	new = (old & ~mask) | value;
	change = old != new;
2335 2336 2337 2338 2339
	if (change) {
		ret = snd_soc_write(codec, reg, new);
		if (ret < 0)
			return ret;
	}
F
Frank Mandarino 已提交
2340 2341 2342 2343 2344

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);

2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355
/**
 * snd_soc_update_bits_locked - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value, and takes the codec mutex.
 *
 * Returns 1 for change else 0.
 */
2356 2357 2358
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
2359 2360 2361 2362 2363 2364 2365 2366 2367
{
	int change;

	mutex_lock(&codec->mutex);
	change = snd_soc_update_bits(codec, reg, mask, value);
	mutex_unlock(&codec->mutex);

	return change;
}
2368
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2369

F
Frank Mandarino 已提交
2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382
/**
 * snd_soc_test_bits - test register for change
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Tests a register with a new value and checks if the new value is
 * different from the old value.
 *
 * Returns 1 for change else 0.
 */
int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2383
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
2384 2385
{
	int change;
2386
	unsigned int old, new;
F
Frank Mandarino 已提交
2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422

	old = snd_soc_read(codec, reg);
	new = (old & ~mask) | value;
	change = old != new;

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

/**
 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 * @substream: the pcm substream
 * @hw: the hardware parameters
 *
 * Sets the substream runtime hardware parameters.
 */
int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
	const struct snd_pcm_hardware *hw)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	runtime->hw.info = hw->info;
	runtime->hw.formats = hw->formats;
	runtime->hw.period_bytes_min = hw->period_bytes_min;
	runtime->hw.period_bytes_max = hw->period_bytes_max;
	runtime->hw.periods_min = hw->periods_min;
	runtime->hw.periods_max = hw->periods_max;
	runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
	runtime->hw.fifo_size = hw->fifo_size;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
M
Mark Brown 已提交
2423
 * @long_name: control long name
2424
 * @prefix: control name prefix
F
Frank Mandarino 已提交
2425 2426 2427 2428 2429 2430
 *
 * Create a new mixer control from a template control.
 *
 * Returns 0 for success, else error.
 */
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2431 2432
				  void *data, char *long_name,
				  const char *prefix)
F
Frank Mandarino 已提交
2433 2434
{
	struct snd_kcontrol_new template;
2435 2436 2437
	struct snd_kcontrol *kcontrol;
	char *name = NULL;
	int name_len;
F
Frank Mandarino 已提交
2438 2439 2440 2441

	memcpy(&template, _template, sizeof(template));
	template.index = 0;

2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462
	if (!long_name)
		long_name = template.name;

	if (prefix) {
		name_len = strlen(long_name) + strlen(prefix) + 2;
		name = kmalloc(name_len, GFP_ATOMIC);
		if (!name)
			return NULL;

		snprintf(name, name_len, "%s %s", prefix, long_name);

		template.name = name;
	} else {
		template.name = long_name;
	}

	kcontrol = snd_ctl_new1(&template, data);

	kfree(name);

	return kcontrol;
F
Frank Mandarino 已提交
2463 2464 2465
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

I
Ian Molton 已提交
2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479
/**
 * snd_soc_add_controls - add an array of controls to a codec.
 * Convienience function to add a list of controls. Many codecs were
 * duplicating this code.
 *
 * @codec: codec to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
int snd_soc_add_controls(struct snd_soc_codec *codec,
	const struct snd_kcontrol_new *controls, int num_controls)
{
2480
	struct snd_card *card = codec->card->snd_card;
I
Ian Molton 已提交
2481 2482 2483 2484
	int err, i;

	for (i = 0; i < num_controls; i++) {
		const struct snd_kcontrol_new *control = &controls[i];
2485 2486 2487
		err = snd_ctl_add(card, snd_soc_cnew(control, codec,
						     control->name,
						     codec->name_prefix));
I
Ian Molton 已提交
2488
		if (err < 0) {
2489
			dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2490
				codec->name, control->name, err);
I
Ian Molton 已提交
2491 2492 2493 2494 2495 2496 2497 2498
			return err;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_controls);

F
Frank Mandarino 已提交
2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515
/**
 * snd_soc_info_enum_double - enumerated double mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a double enumerated
 * mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2516
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
2517

2518 2519
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
2520 2521 2522 2523 2524 2525 2526 2527 2528
	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);

/**
 * snd_soc_get_enum_double - enumerated double mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2529
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2530 2531 2532 2533 2534 2535 2536 2537 2538 2539
 *
 * Callback to get the value of a double enumerated mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2540
	unsigned int val, bitmask;
F
Frank Mandarino 已提交
2541

2542
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2543 2544
		;
	val = snd_soc_read(codec, e->reg);
2545 2546
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
F
Frank Mandarino 已提交
2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557
	if (e->shift_l != e->shift_r)
		ucontrol->value.enumerated.item[1] =
			(val >> e->shift_r) & (bitmask - 1);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);

/**
 * snd_soc_put_enum_double - enumerated double mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2558
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2559 2560 2561 2562 2563 2564 2565 2566 2567 2568
 *
 * Callback to set the value of a double enumerated mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2569 2570
	unsigned int val;
	unsigned int mask, bitmask;
F
Frank Mandarino 已提交
2571

2572
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2573
		;
2574
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
2575 2576 2577 2578
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
2579
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
Frank Mandarino 已提交
2580 2581 2582 2583 2584
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

2585
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
F
Frank Mandarino 已提交
2586 2587 2588
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604
/**
 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to get the value of a double semi enumerated mixer.
 *
 * Semi enumerated mixer: the enumerated items are referred as values. Can be
 * used for handling bitfield coded enumeration for example.
 *
 * Returns 0 for success.
 */
int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2605
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2606
	unsigned int reg_val, val, mux;
P
Peter Ujfalusi 已提交
2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643

	reg_val = snd_soc_read(codec, e->reg);
	val = (reg_val >> e->shift_l) & e->mask;
	for (mux = 0; mux < e->max; mux++) {
		if (val == e->values[mux])
			break;
	}
	ucontrol->value.enumerated.item[0] = mux;
	if (e->shift_l != e->shift_r) {
		val = (reg_val >> e->shift_r) & e->mask;
		for (mux = 0; mux < e->max; mux++) {
			if (val == e->values[mux])
				break;
		}
		ucontrol->value.enumerated.item[1] = mux;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);

/**
 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to set the value of a double semi enumerated mixer.
 *
 * Semi enumerated mixer: the enumerated items are referred as values. Can be
 * used for handling bitfield coded enumeration for example.
 *
 * Returns 0 for success.
 */
int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2644
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2645 2646
	unsigned int val;
	unsigned int mask;
P
Peter Ujfalusi 已提交
2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658

	if (ucontrol->value.enumerated.item[0] > e->max - 1)
		return -EINVAL;
	val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
	mask = e->mask << e->shift_l;
	if (e->shift_l != e->shift_r) {
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
			return -EINVAL;
		val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
		mask |= e->mask << e->shift_r;
	}

2659
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
P
Peter Ujfalusi 已提交
2660 2661 2662
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

F
Frank Mandarino 已提交
2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679
/**
 * snd_soc_info_enum_ext - external enumerated single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about an external enumerated
 * single mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
2680
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
2681

2682 2683
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701
	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);

/**
 * snd_soc_info_volsw_ext - external single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single external mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
P
Philipp Zabel 已提交
2702 2703
	int max = kcontrol->private_value;

2704
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2705 2706 2707
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2708 2709 2710

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
2711
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);

/**
 * snd_soc_info_volsw - single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2728 2729
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2730
	int platform_max;
2731
	unsigned int shift = mc->shift;
2732
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
2733

2734 2735 2736 2737 2738
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2739 2740 2741 2742
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
Frank Mandarino 已提交
2743 2744
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
2745
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2746 2747 2748 2749 2750 2751 2752
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);

/**
 * snd_soc_get_volsw - single mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2753
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2754 2755 2756 2757 2758 2759 2760 2761
 *
 * Callback to get the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2762 2763
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2764
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2765 2766 2767
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2768
	int max = mc->max;
2769 2770
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2771 2772 2773 2774 2775 2776 2777 2778

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	if (shift != rshift)
		ucontrol->value.integer.value[1] =
			(snd_soc_read(codec, reg) >> rshift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
2779
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2780 2781
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2782
				max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2783 2784 2785 2786 2787 2788 2789 2790 2791
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);

/**
 * snd_soc_put_volsw - single mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2792
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2793 2794 2795 2796 2797 2798 2799 2800
 *
 * Callback to set the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2801 2802
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2803
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2804 2805 2806
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2807
	int max = mc->max;
2808 2809
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2810
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2811 2812 2813

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
2814
		val = max - val;
F
Frank Mandarino 已提交
2815 2816 2817 2818 2819
	val_mask = mask << shift;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		if (invert)
P
Philipp Zabel 已提交
2820
			val2 = max - val2;
F
Frank Mandarino 已提交
2821 2822 2823
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
2824
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
F
Frank Mandarino 已提交
2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw);

/**
 * snd_soc_info_volsw_2r - double mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a double mixer control that
 * spans 2 codec registers.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2841 2842
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2843
	int platform_max;
P
Philipp Zabel 已提交
2844

2845 2846 2847 2848 2849
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2850 2851 2852
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2853 2854 2855

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2856
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2857 2858 2859 2860 2861 2862 2863
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);

/**
 * snd_soc_get_volsw_2r - double mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2864
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2865 2866 2867 2868 2869 2870 2871 2872
 *
 * Callback to get the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2873 2874
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2875
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2876 2877 2878
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2879
	int max = mc->max;
2880
	unsigned int mask = (1 << fls(max)) - 1;
2881
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2882 2883 2884 2885 2886 2887 2888

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	ucontrol->value.integer.value[1] =
		(snd_soc_read(codec, reg2) >> shift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
2889
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2890
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2891
			max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2892 2893 2894 2895 2896 2897 2898 2899 2900
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);

/**
 * snd_soc_put_volsw_2r - double mixer set callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2901
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2902 2903 2904 2905 2906 2907 2908 2909
 *
 * Callback to set the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2910 2911
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2912
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2913 2914 2915
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2916
	int max = mc->max;
2917 2918
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2919
	int err;
2920
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2921 2922 2923 2924 2925 2926

	val_mask = mask << shift;
	val = (ucontrol->value.integer.value[0] & mask);
	val2 = (ucontrol->value.integer.value[1] & mask);

	if (invert) {
P
Philipp Zabel 已提交
2927 2928
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
2929 2930 2931 2932 2933
	}

	val = val << shift;
	val2 = val2 << shift;

2934
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2935
	if (err < 0)
F
Frank Mandarino 已提交
2936 2937
		return err;

2938
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
F
Frank Mandarino 已提交
2939 2940 2941 2942
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954
/**
 * snd_soc_info_volsw_s8 - signed mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2955 2956
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2957
	int platform_max;
2958
	int min = mc->min;
2959

2960 2961 2962 2963
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

2964 2965 2966
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2967
	uinfo->value.integer.max = platform_max - min;
2968 2969 2970 2971 2972 2973 2974
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);

/**
 * snd_soc_get_volsw_s8 - signed mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2975
 * @ucontrol: control element information
2976 2977 2978 2979 2980 2981 2982 2983
 *
 * Callback to get the value of a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2984 2985
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2986
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2987
	unsigned int reg = mc->reg;
2988
	int min = mc->min;
2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001
	int val = snd_soc_read(codec, reg);

	ucontrol->value.integer.value[0] =
		((signed char)(val & 0xff))-min;
	ucontrol->value.integer.value[1] =
		((signed char)((val >> 8) & 0xff))-min;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);

/**
 * snd_soc_put_volsw_sgn - signed mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
3002
 * @ucontrol: control element information
3003 3004 3005 3006 3007 3008 3009 3010
 *
 * Callback to set the value of a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
3011 3012
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
3013
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3014
	unsigned int reg = mc->reg;
3015
	int min = mc->min;
3016
	unsigned int val;
3017 3018 3019 3020

	val = (ucontrol->value.integer.value[0]+min) & 0xff;
	val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;

3021
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3022 3023 3024
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036
/**
 * snd_soc_limit_volume - Set new limit to an existing volume control.
 *
 * @codec: where to look for the control
 * @name: Name of the control
 * @max: new maximum limit
 *
 * Return 0 for success, else error.
 */
int snd_soc_limit_volume(struct snd_soc_codec *codec,
	const char *name, int max)
{
3037
	struct snd_card *card = codec->card->snd_card;
3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055
	struct snd_kcontrol *kctl;
	struct soc_mixer_control *mc;
	int found = 0;
	int ret = -EINVAL;

	/* Sanity check for name and max */
	if (unlikely(!name || max <= 0))
		return -EINVAL;

	list_for_each_entry(kctl, &card->controls, list) {
		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
			found = 1;
			break;
		}
	}
	if (found) {
		mc = (struct soc_mixer_control *)kctl->private_value;
		if (max <= mc->max) {
3056
			mc->platform_max = max;
3057 3058 3059 3060 3061 3062 3063
			ret = 0;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);

3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107
/**
 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
 *  mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_info *uinfo)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = max-min;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);

/**
 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
 *  mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int mask = (1<<mc->shift)-1;
	int min = mc->min;
	int val = snd_soc_read(codec, mc->reg) & mask;
	int valr = snd_soc_read(codec, mc->rreg) & mask;

3108 3109
	ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
	ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);

/**
 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
 *  mixer put callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int mask = (1<<mc->shift)-1;
	int min = mc->min;
	int ret;
	unsigned int val, valr, oval, ovalr;

	val = ((ucontrol->value.integer.value[0]+min) & 0xff);
	val &= mask;
	valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
	valr &= mask;

	oval = snd_soc_read(codec, mc->reg) & mask;
	ovalr = snd_soc_read(codec, mc->rreg) & mask;

	ret = 0;
	if (oval != val) {
		ret = snd_soc_write(codec, mc->reg, val);
		if (ret < 0)
3145
			return ret;
3146 3147 3148 3149
	}
	if (ovalr != valr) {
		ret = snd_soc_write(codec, mc->rreg, valr);
		if (ret < 0)
3150
			return ret;
3151 3152 3153 3154 3155 3156
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);

3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168
/**
 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
 * @dai: DAI
 * @clk_id: DAI specific clock ID
 * @freq: new clock frequency in Hz
 * @dir: new clock direction - input/output.
 *
 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
 */
int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
	unsigned int freq, int dir)
{
3169 3170
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3171 3172 3173
	else if (dai->codec && dai->codec->driver->set_sysclk)
		return dai->codec->driver->set_sysclk(dai->codec, clk_id,
						      freq, dir);
3174 3175 3176 3177 3178
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197
/**
 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
 * @codec: CODEC
 * @clk_id: DAI specific clock ID
 * @freq: new clock frequency in Hz
 * @dir: new clock direction - input/output.
 *
 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
 */
int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
	unsigned int freq, int dir)
{
	if (codec->driver->set_sysclk)
		return codec->driver->set_sysclk(codec, clk_id, freq, dir);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);

3198 3199 3200
/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
3201
 * @div_id: DAI specific clock divider ID
3202 3203 3204 3205 3206 3207 3208 3209 3210
 * @div: new clock divisor.
 *
 * Configures the clock dividers. This is used to derive the best DAI bit and
 * frame clocks from the system or master clock. It's best to set the DAI bit
 * and frame clocks as low as possible to save system power.
 */
int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
	int div_id, int div)
{
3211 3212
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
3213 3214 3215 3216 3217 3218 3219 3220 3221
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);

/**
 * snd_soc_dai_set_pll - configure DAI PLL.
 * @dai: DAI
 * @pll_id: DAI specific PLL ID
3222
 * @source: DAI specific source for the PLL
3223 3224 3225 3226 3227
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
3228 3229
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
3230
{
3231 3232
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
3233
					 freq_in, freq_out);
3234 3235 3236
	else if (dai->codec && dai->codec->driver->set_pll)
		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
						   freq_in, freq_out);
3237 3238 3239 3240 3241
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262
/*
 * snd_soc_codec_set_pll - configure codec PLL.
 * @codec: CODEC
 * @pll_id: DAI specific PLL ID
 * @source: DAI specific source for the PLL
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
			  unsigned int freq_in, unsigned int freq_out)
{
	if (codec->driver->set_pll)
		return codec->driver->set_pll(codec, pll_id, source,
					      freq_in, freq_out);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);

3263 3264 3265 3266 3267 3268 3269 3270 3271
/**
 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
 * @dai: DAI
 * @fmt: SND_SOC_DAIFMT_ format value.
 *
 * Configures the DAI hardware format and clocking.
 */
int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
3272 3273
	if (dai->driver && dai->driver->ops->set_fmt)
		return dai->driver->ops->set_fmt(dai, fmt);
3274 3275 3276 3277 3278 3279 3280 3281
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
3282 3283
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
3284
 * @slots: Number of slots in use.
3285
 * @slot_width: Width in bits for each slot.
3286 3287 3288 3289 3290
 *
 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
 * specific.
 */
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3291
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3292
{
3293 3294
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3295
				slots, slot_width);
3296 3297 3298 3299 3300
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316
/**
 * snd_soc_dai_set_channel_map - configure DAI audio channel map
 * @dai: DAI
 * @tx_num: how many TX channels
 * @tx_slot: pointer to an array which imply the TX slot number channel
 *           0~num-1 uses
 * @rx_num: how many RX channels
 * @rx_slot: pointer to an array which imply the RX slot number channel
 *           0~num-1 uses
 *
 * configure the relationship between channel number and TDM slot number.
 */
int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
	unsigned int tx_num, unsigned int *tx_slot,
	unsigned int rx_num, unsigned int *rx_slot)
{
3317 3318
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3319 3320 3321 3322 3323 3324
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

3325 3326 3327 3328 3329 3330 3331 3332 3333
/**
 * snd_soc_dai_set_tristate - configure DAI system or master clock.
 * @dai: DAI
 * @tristate: tristate enable
 *
 * Tristates the DAI so that others can use it.
 */
int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
{
3334 3335
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);

/**
 * snd_soc_dai_digital_mute - configure DAI system or master clock.
 * @dai: DAI
 * @mute: mute enable
 *
 * Mutes the DAI DAC.
 */
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
{
3350 3351
	if (dai->driver && dai->driver->ops->digital_mute)
		return dai->driver->ops->digital_mute(dai, mute);
3352 3353 3354 3355 3356
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
3357 3358 3359
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
3360
 * @card: Card to register
M
Mark Brown 已提交
3361 3362
 *
 */
3363
int snd_soc_register_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3364
{
3365 3366
	int i;

M
Mark Brown 已提交
3367 3368 3369
	if (!card->name || !card->dev)
		return -EINVAL;

3370 3371
	snd_soc_initialize_card_lists(card);

3372 3373
	soc_init_card_debugfs(card);

3374 3375 3376
	card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
			    (card->num_links + card->num_aux_devs),
			    GFP_KERNEL);
3377 3378
	if (card->rtd == NULL)
		return -ENOMEM;
3379
	card->rtd_aux = &card->rtd[card->num_links];
3380 3381 3382 3383

	for (i = 0; i < card->num_links; i++)
		card->rtd[i].dai_link = &card->dai_link[i];

M
Mark Brown 已提交
3384 3385
	INIT_LIST_HEAD(&card->list);
	card->instantiated = 0;
3386
	mutex_init(&card->mutex);
M
Mark Brown 已提交
3387 3388 3389

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
3390
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3391 3392 3393 3394 3395 3396
	mutex_unlock(&client_mutex);

	dev_dbg(card->dev, "Registered card '%s'\n", card->name);

	return 0;
}
3397
EXPORT_SYMBOL_GPL(snd_soc_register_card);
M
Mark Brown 已提交
3398 3399 3400 3401

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
3402
 * @card: Card to unregister
M
Mark Brown 已提交
3403 3404
 *
 */
3405
int snd_soc_unregister_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3406
{
3407 3408
	if (card->instantiated)
		soc_cleanup_card_resources(card);
M
Mark Brown 已提交
3409 3410 3411 3412 3413 3414 3415
	mutex_lock(&client_mutex);
	list_del(&card->list);
	mutex_unlock(&client_mutex);
	dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);

	return 0;
}
3416
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
M
Mark Brown 已提交
3417

3418 3419 3420 3421
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
3422
static char *fmt_single_name(struct device *dev, int *id)
3423 3424 3425 3426 3427 3428 3429
{
	char *found, name[NAME_SIZE];
	int id1, id2;

	if (dev_name(dev) == NULL)
		return NULL;

3430
	strlcpy(name, dev_name(dev), NAME_SIZE);
3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448

	/* are we a "%s.%d" name (platform and SPI components) */
	found = strstr(name, dev->driver->name);
	if (found) {
		/* get ID */
		if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {

			/* discard ID from name if ID == -1 */
			if (*id == -1)
				found[strlen(dev->driver->name)] = '\0';
		}

	} else {
		/* I2C component devices are named "bus-addr"  */
		if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
			char tmp[NAME_SIZE];

			/* create unique ID number from I2C addr and bus */
3449
			*id = ((id1 & 0xffff) << 16) + id2;
3450 3451 3452

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3453
			strlcpy(name, tmp, NAME_SIZE);
3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476
		} else
			*id = 0;
	}

	return kstrdup(name, GFP_KERNEL);
}

/*
 * Simplify DAI link naming for single devices with multiple DAIs by removing
 * any ".-1" and using the DAI name (instead of device name).
 */
static inline char *fmt_multiple_name(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
{
	if (dai_drv->name == NULL) {
		printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
				dev_name(dev));
		return NULL;
	}

	return kstrdup(dai_drv->name, GFP_KERNEL);
}

M
Mark Brown 已提交
3477 3478 3479
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
3480
 * @dai: DAI to register
M
Mark Brown 已提交
3481
 */
3482 3483
int snd_soc_register_dai(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
M
Mark Brown 已提交
3484
{
3485 3486 3487
	struct snd_soc_dai *dai;

	dev_dbg(dev, "dai register %s\n", dev_name(dev));
M
Mark Brown 已提交
3488

3489 3490
	dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
	if (dai == NULL)
L
Lu Guanqun 已提交
3491
		return -ENOMEM;
M
Mark Brown 已提交
3492

3493 3494 3495 3496 3497 3498
	/* create DAI component name */
	dai->name = fmt_single_name(dev, &dai->id);
	if (dai->name == NULL) {
		kfree(dai);
		return -ENOMEM;
	}
3499

3500 3501 3502 3503
	dai->dev = dev;
	dai->driver = dai_drv;
	if (!dai->driver->ops)
		dai->driver->ops = &null_dai_ops;
M
Mark Brown 已提交
3504 3505 3506

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
3507
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518
	mutex_unlock(&client_mutex);

	pr_debug("Registered DAI '%s'\n", dai->name);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dai);

/**
 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
 *
M
Mark Brown 已提交
3519
 * @dai: DAI to unregister
M
Mark Brown 已提交
3520
 */
3521
void snd_soc_unregister_dai(struct device *dev)
M
Mark Brown 已提交
3522
{
3523 3524 3525 3526 3527 3528 3529 3530 3531
	struct snd_soc_dai *dai;

	list_for_each_entry(dai, &dai_list, list) {
		if (dev == dai->dev)
			goto found;
	}
	return;

found:
M
Mark Brown 已提交
3532 3533 3534 3535 3536
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered DAI '%s'\n", dai->name);
3537 3538
	kfree(dai->name);
	kfree(dai);
M
Mark Brown 已提交
3539 3540 3541 3542 3543 3544
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
3545 3546
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
3547
 */
3548 3549
int snd_soc_register_dais(struct device *dev,
		struct snd_soc_dai_driver *dai_drv, size_t count)
M
Mark Brown 已提交
3550
{
3551 3552 3553
	struct snd_soc_dai *dai;
	int i, ret = 0;

3554
	dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
3555 3556

	for (i = 0; i < count; i++) {
3557 3558

		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3559 3560 3561 3562
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
3563 3564 3565 3566 3567 3568

		/* create DAI component name */
		dai->name = fmt_multiple_name(dev, &dai_drv[i]);
		if (dai->name == NULL) {
			kfree(dai);
			ret = -EINVAL;
M
Mark Brown 已提交
3569
			goto err;
3570 3571 3572 3573
		}

		dai->dev = dev;
		dai->driver = &dai_drv[i];
3574 3575 3576 3577
		if (dai->driver->id)
			dai->id = dai->driver->id;
		else
			dai->id = i;
3578 3579 3580 3581 3582 3583 3584 3585
		if (!dai->driver->ops)
			dai->driver->ops = &null_dai_ops;

		mutex_lock(&client_mutex);
		list_add(&dai->list, &dai_list);
		mutex_unlock(&client_mutex);

		pr_debug("Registered DAI '%s'\n", dai->name);
M
Mark Brown 已提交
3586 3587
	}

3588
	mutex_lock(&client_mutex);
3589
	snd_soc_instantiate_cards();
3590
	mutex_unlock(&client_mutex);
M
Mark Brown 已提交
3591 3592 3593 3594
	return 0;

err:
	for (i--; i >= 0; i--)
3595
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3596 3597 3598 3599 3600 3601 3602 3603

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dais);

/**
 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
 *
M
Mark Brown 已提交
3604 3605
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
3606
 */
3607
void snd_soc_unregister_dais(struct device *dev, size_t count)
M
Mark Brown 已提交
3608 3609 3610 3611
{
	int i;

	for (i = 0; i < count; i++)
3612
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3613 3614 3615
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);

M
Mark Brown 已提交
3616 3617 3618
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
3619
 * @platform: platform to register
M
Mark Brown 已提交
3620
 */
3621 3622
int snd_soc_register_platform(struct device *dev,
		struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
3623
{
3624 3625 3626 3627 3628 3629
	struct snd_soc_platform *platform;

	dev_dbg(dev, "platform register %s\n", dev_name(dev));

	platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
	if (platform == NULL)
L
Lu Guanqun 已提交
3630
		return -ENOMEM;
3631 3632 3633 3634 3635 3636 3637

	/* create platform component name */
	platform->name = fmt_single_name(dev, &platform->id);
	if (platform->name == NULL) {
		kfree(platform);
		return -ENOMEM;
	}
M
Mark Brown 已提交
3638

3639 3640
	platform->dev = dev;
	platform->driver = platform_drv;
M
Mark Brown 已提交
3641 3642 3643

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
3644
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655
	mutex_unlock(&client_mutex);

	pr_debug("Registered platform '%s'\n", platform->name);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_platform);

/**
 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
 *
M
Mark Brown 已提交
3656
 * @platform: platform to unregister
M
Mark Brown 已提交
3657
 */
3658
void snd_soc_unregister_platform(struct device *dev)
M
Mark Brown 已提交
3659
{
3660 3661 3662 3663 3664 3665 3666 3667 3668
	struct snd_soc_platform *platform;

	list_for_each_entry(platform, &platform_list, list) {
		if (dev == platform->dev)
			goto found;
	}
	return;

found:
M
Mark Brown 已提交
3669 3670 3671 3672 3673
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered platform '%s'\n", platform->name);
3674 3675
	kfree(platform->name);
	kfree(platform);
M
Mark Brown 已提交
3676 3677 3678
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711
static u64 codec_format_map[] = {
	SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
	SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
	SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
	SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
	SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
	SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
	SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
	SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
	SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
	SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
	SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
	SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
	SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
	| SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
};

/* Fix up the DAI formats for endianness: codecs don't actually see
 * the endianness of the data but we're using the CPU format
 * definitions which do need to include endianness so we ensure that
 * codec DAIs always have both big and little endian variants set.
 */
static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
		if (stream->formats & codec_format_map[i])
			stream->formats |= codec_format_map[i];
}

M
Mark Brown 已提交
3712 3713 3714
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
3715
 * @codec: codec to register
M
Mark Brown 已提交
3716
 */
3717
int snd_soc_register_codec(struct device *dev,
3718 3719 3720
			   const struct snd_soc_codec_driver *codec_drv,
			   struct snd_soc_dai_driver *dai_drv,
			   int num_dai)
M
Mark Brown 已提交
3721
{
3722
	size_t reg_size;
3723 3724
	struct snd_soc_codec *codec;
	int ret, i;
3725

3726 3727 3728 3729 3730
	dev_dbg(dev, "codec register %s\n", dev_name(dev));

	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;
M
Mark Brown 已提交
3731

3732 3733 3734 3735 3736 3737 3738
	/* create CODEC component name */
	codec->name = fmt_single_name(dev, &codec->id);
	if (codec->name == NULL) {
		kfree(codec);
		return -ENOMEM;
	}

3739 3740 3741 3742 3743
	if (codec_drv->compress_type)
		codec->compress_type = codec_drv->compress_type;
	else
		codec->compress_type = SND_SOC_FLAT_COMPRESSION;

3744 3745
	codec->write = codec_drv->write;
	codec->read = codec_drv->read;
3746 3747
	codec->volatile_register = codec_drv->volatile_register;
	codec->readable_register = codec_drv->readable_register;
3748
	codec->writable_register = codec_drv->writable_register;
L
Liam Girdwood 已提交
3749 3750 3751
	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
	codec->dapm.dev = dev;
	codec->dapm.codec = codec;
3752
	codec->dapm.seq_notifier = codec_drv->seq_notifier;
3753 3754 3755 3756
	codec->dev = dev;
	codec->driver = codec_drv;
	codec->num_dai = num_dai;
	mutex_init(&codec->mutex);
L
Liam Girdwood 已提交
3757

3758 3759
	/* allocate CODEC register cache */
	if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3760
		reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3761
		codec->reg_size = reg_size;
3762 3763 3764 3765 3766 3767
		/* it is necessary to make a copy of the default register cache
		 * because in the case of using a compression type that requires
		 * the default register cache to be marked as __devinitconst the
		 * kernel might have freed the array by the time we initialize
		 * the cache.
		 */
3768 3769 3770 3771 3772 3773 3774
		if (codec_drv->reg_cache_default) {
			codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
						      reg_size, GFP_KERNEL);
			if (!codec->reg_def_copy) {
				ret = -ENOMEM;
				goto fail;
			}
3775
		}
3776 3777
	}

3778 3779 3780 3781 3782
	if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
		if (!codec->volatile_register)
			codec->volatile_register = snd_soc_default_volatile_register;
		if (!codec->readable_register)
			codec->readable_register = snd_soc_default_readable_register;
3783 3784
		if (!codec->writable_register)
			codec->writable_register = snd_soc_default_writable_register;
3785 3786
	}

3787 3788 3789 3790 3791
	for (i = 0; i < num_dai; i++) {
		fixup_codec_formats(&dai_drv[i].playback);
		fixup_codec_formats(&dai_drv[i].capture);
	}

3792 3793 3794 3795
	/* register any DAIs */
	if (num_dai) {
		ret = snd_soc_register_dais(dev, dai_drv, num_dai);
		if (ret < 0)
3796
			goto fail;
3797
	}
3798

M
Mark Brown 已提交
3799 3800 3801 3802 3803 3804 3805
	mutex_lock(&client_mutex);
	list_add(&codec->list, &codec_list);
	snd_soc_instantiate_cards();
	mutex_unlock(&client_mutex);

	pr_debug("Registered codec '%s'\n", codec->name);
	return 0;
3806

3807
fail:
3808 3809
	kfree(codec->reg_def_copy);
	codec->reg_def_copy = NULL;
3810 3811 3812
	kfree(codec->name);
	kfree(codec);
	return ret;
M
Mark Brown 已提交
3813 3814 3815 3816 3817 3818
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
3819
 * @codec: codec to unregister
M
Mark Brown 已提交
3820
 */
3821
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
3822
{
3823 3824 3825 3826 3827 3828 3829 3830 3831 3832
	struct snd_soc_codec *codec;
	int i;

	list_for_each_entry(codec, &codec_list, list) {
		if (dev == codec->dev)
			goto found;
	}
	return;

found:
3833 3834 3835
	if (codec->num_dai)
		for (i = 0; i < codec->num_dai; i++)
			snd_soc_unregister_dai(dev);
3836

M
Mark Brown 已提交
3837 3838 3839 3840 3841
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered codec '%s'\n", codec->name);
3842

3843
	snd_soc_cache_exit(codec);
3844
	kfree(codec->reg_def_copy);
3845
	kfree(codec->name);
3846
	kfree(codec);
M
Mark Brown 已提交
3847 3848 3849
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

3850
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
3851
{
3852
#ifdef CONFIG_DEBUG_FS
3853 3854
	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3855 3856
		printk(KERN_WARNING
		       "ASoC: Failed to create debugfs directory\n");
3857
		snd_soc_debugfs_root = NULL;
3858
	}
3859

3860
	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3861 3862 3863
				 &codec_list_fops))
		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");

3864
	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
M
Mark Brown 已提交
3865 3866
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3867

3868
	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3869 3870
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
3871 3872
#endif

3873 3874
	snd_soc_util_init();

F
Frank Mandarino 已提交
3875 3876
	return platform_driver_register(&soc_driver);
}
3877
module_init(snd_soc_init);
F
Frank Mandarino 已提交
3878

M
Mark Brown 已提交
3879
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
3880
{
3881 3882
	snd_soc_util_exit();

3883
#ifdef CONFIG_DEBUG_FS
3884
	debugfs_remove_recursive(snd_soc_debugfs_root);
3885
#endif
3886
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
3887 3888 3889 3890
}
module_exit(snd_soc_exit);

/* Module information */
3891
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
3892 3893
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
3894
MODULE_ALIAS("platform:soc-audio");