soc-core.c 70.4 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 6
 * Copyright 2005 Openedhand Ltd.
 *
7
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 9
 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
F
Frank Mandarino 已提交
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
 *
 *  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>
29
#include <linux/debugfs.h>
F
Frank Mandarino 已提交
30
#include <linux/platform_device.h>
31
#include <sound/ac97_codec.h>
F
Frank Mandarino 已提交
32 33 34 35 36 37 38 39 40 41
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

static DEFINE_MUTEX(pcm_mutex);
static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);

42 43 44 45
#ifdef CONFIG_DEBUG_FS
static struct dentry *debugfs_root;
#endif

M
Mark Brown 已提交
46 47
static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(card_list);
M
Mark Brown 已提交
48
static LIST_HEAD(dai_list);
M
Mark Brown 已提交
49
static LIST_HEAD(platform_list);
M
Mark Brown 已提交
50
static LIST_HEAD(codec_list);
M
Mark Brown 已提交
51 52 53 54

static int snd_soc_register_card(struct snd_soc_card *card);
static int snd_soc_unregister_card(struct snd_soc_card *card);

F
Frank Mandarino 已提交
55 56 57 58 59 60 61 62 63
/*
 * 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)");

64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
/*
 * This function forces any delayed work to be queued and run.
 */
static int run_delayed_work(struct delayed_work *dwork)
{
	int ret;

	/* cancel any work waiting to be queued. */
	ret = cancel_delayed_work(dwork);

	/* if there was any work waiting then we run it now and
	 * wait for it's completion */
	if (ret) {
		schedule_delayed_work(dwork, 0);
		flush_scheduled_work();
	}
	return ret;
}

83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
/* codec register dump */
static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
{
	int i, step = 1, count = 0;

	if (!codec->reg_cache_size)
		return 0;

	if (codec->reg_cache_step)
		step = codec->reg_cache_step;

	count += sprintf(buf, "%s registers\n", codec->name);
	for (i = 0; i < codec->reg_cache_size; i += step) {
		if (codec->readable_register && !codec->readable_register(i))
			continue;

		count += sprintf(buf + count, "%2x: ", i);
		if (count >= PAGE_SIZE - 1)
			break;

		if (codec->display_register)
			count += codec->display_register(codec, buf + count,
							 PAGE_SIZE - count, i);
		else
			count += snprintf(buf + count, PAGE_SIZE - count,
					  "%4x", codec->read(codec, i));

		if (count >= PAGE_SIZE - 1)
			break;

		count += snprintf(buf + count, PAGE_SIZE - count, "\n");
		if (count >= PAGE_SIZE - 1)
			break;
	}

	/* Truncate count; min() would cause a warning */
	if (count >= PAGE_SIZE)
		count = PAGE_SIZE - 1;

	return count;
}
static ssize_t codec_reg_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct snd_soc_device *devdata = dev_get_drvdata(dev);
	return soc_codec_reg_show(devdata->card->codec, buf);
}

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

133 134 135 136 137 138
static ssize_t pmdown_time_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct snd_soc_device *socdev = dev_get_drvdata(dev);
	struct snd_soc_card *card = socdev->card;

M
Mark Brown 已提交
139
	return sprintf(buf, "%ld\n", card->pmdown_time);
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
}

static ssize_t pmdown_time_set(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
	struct snd_soc_device *socdev = dev_get_drvdata(dev);
	struct snd_soc_card *card = socdev->card;

	strict_strtol(buf, 10, &card->pmdown_time);

	return count;
}

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

156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272
#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,
			       size_t count, loff_t *ppos)
{
	ssize_t ret;
	struct snd_soc_codec *codec = file->private_data;
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	ret = soc_codec_reg_show(codec, buf);
	if (ret >= 0)
		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
	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;

	if (codec->reg_cache_step)
		step = codec->reg_cache_step;

	while (*start == ' ')
		start++;
	reg = simple_strtoul(start, &start, 16);
	if ((reg >= codec->reg_cache_size) || (reg % step))
		return -EINVAL;
	while (*start == ' ')
		start++;
	if (strict_strtoul(start, 16, &value))
		return -EINVAL;
	codec->write(codec, reg, value);
	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,
};

static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
	char codec_root[128];

	if (codec->dev)
		snprintf(codec_root, sizeof(codec_root),
			"%s.%s", codec->name, dev_name(codec->dev));
	else
		snprintf(codec_root, sizeof(codec_root),
			"%s", codec->name);

	codec->debugfs_codec_root = debugfs_create_dir(codec_root,
						       debugfs_root);
	if (!codec->debugfs_codec_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create codec debugfs directory\n");
		return;
	}

	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");

	codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
						     codec->debugfs_codec_root,
						     &codec->pop_time);
	if (!codec->debugfs_pop_time)
		printk(KERN_WARNING
		       "Failed to create pop time debugfs file\n");

	codec->debugfs_dapm = debugfs_create_dir("dapm",
						 codec->debugfs_codec_root);
	if (!codec->debugfs_dapm)
		printk(KERN_WARNING
		       "Failed to create DAPM debugfs directory\n");

	snd_soc_dapm_debugfs_init(codec);
}

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

#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)
{
}
#endif

F
Frank Mandarino 已提交
273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
#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;
291
	codec->ac97->dev.parent = codec->card->dev;
F
Frank Mandarino 已提交
292 293
	codec->ac97->dev.release = soc_ac97_device_release;

294 295
	dev_set_name(&codec->ac97->dev, "%d-%d:%s",
		     codec->card->number, 0, codec->name);
F
Frank Mandarino 已提交
296 297 298 299 300 301 302 303 304 305
	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

306 307 308 309 310 311 312 313 314 315 316 317
static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_dai_link *machine = rtd->dai;
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
	int ret;

	if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
	    machine->symmetric_rates) {
318
		dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334
			machine->rate);

		ret = snd_pcm_hw_constraint_minmax(substream->runtime,
						   SNDRV_PCM_HW_PARAM_RATE,
						   machine->rate,
						   machine->rate);
		if (ret < 0) {
			dev_err(card->dev,
				"Unable to apply rate symmetry constraint: %d\n", ret);
			return ret;
		}
	}

	return 0;
}

F
Frank Mandarino 已提交
335 336 337 338 339 340 341 342 343
/*
 * 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_soc_device *socdev = rtd->socdev;
344
	struct snd_soc_card *card = socdev->card;
F
Frank Mandarino 已提交
345
	struct snd_pcm_runtime *runtime = substream->runtime;
346
	struct snd_soc_dai_link *machine = rtd->dai;
347
	struct snd_soc_platform *platform = card->platform;
348 349
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
350 351 352 353 354
	int ret = 0;

	mutex_lock(&pcm_mutex);

	/* startup the audio subsystem */
355 356
	if (cpu_dai->ops->startup) {
		ret = cpu_dai->ops->startup(substream, cpu_dai);
F
Frank Mandarino 已提交
357 358
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open interface %s\n",
359
				cpu_dai->name);
F
Frank Mandarino 已提交
360 361 362 363 364 365 366 367 368 369 370 371
			goto out;
		}
	}

	if (platform->pcm_ops->open) {
		ret = platform->pcm_ops->open(substream);
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
			goto platform_err;
		}
	}

372 373
	if (codec_dai->ops->startup) {
		ret = codec_dai->ops->startup(substream, codec_dai);
F
Frank Mandarino 已提交
374
		if (ret < 0) {
375 376 377
			printk(KERN_ERR "asoc: can't open codec %s\n",
				codec_dai->name);
			goto codec_dai_err;
F
Frank Mandarino 已提交
378 379 380
		}
	}

381 382
	if (machine->ops && machine->ops->startup) {
		ret = machine->ops->startup(substream);
F
Frank Mandarino 已提交
383
		if (ret < 0) {
384 385
			printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
			goto machine_err;
F
Frank Mandarino 已提交
386 387 388 389 390 391
		}
	}

	/* Check that the codec and cpu DAI's are compatible */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
392 393
			max(codec_dai->playback.rate_min,
			    cpu_dai->playback.rate_min);
F
Frank Mandarino 已提交
394
		runtime->hw.rate_max =
395 396
			min(codec_dai->playback.rate_max,
			    cpu_dai->playback.rate_max);
F
Frank Mandarino 已提交
397
		runtime->hw.channels_min =
398 399
			max(codec_dai->playback.channels_min,
				cpu_dai->playback.channels_min);
F
Frank Mandarino 已提交
400
		runtime->hw.channels_max =
401 402 403 404 405 406
			min(codec_dai->playback.channels_max,
				cpu_dai->playback.channels_max);
		runtime->hw.formats =
			codec_dai->playback.formats & cpu_dai->playback.formats;
		runtime->hw.rates =
			codec_dai->playback.rates & cpu_dai->playback.rates;
407 408 409 410 411 412
		if (codec_dai->playback.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= cpu_dai->playback.rates;
		if (cpu_dai->playback.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= codec_dai->playback.rates;
F
Frank Mandarino 已提交
413 414
	} else {
		runtime->hw.rate_min =
415 416
			max(codec_dai->capture.rate_min,
			    cpu_dai->capture.rate_min);
F
Frank Mandarino 已提交
417
		runtime->hw.rate_max =
418 419
			min(codec_dai->capture.rate_max,
			    cpu_dai->capture.rate_max);
F
Frank Mandarino 已提交
420
		runtime->hw.channels_min =
421 422
			max(codec_dai->capture.channels_min,
				cpu_dai->capture.channels_min);
F
Frank Mandarino 已提交
423
		runtime->hw.channels_max =
424 425 426 427 428 429
			min(codec_dai->capture.channels_max,
				cpu_dai->capture.channels_max);
		runtime->hw.formats =
			codec_dai->capture.formats & cpu_dai->capture.formats;
		runtime->hw.rates =
			codec_dai->capture.rates & cpu_dai->capture.rates;
430 431 432 433 434 435
		if (codec_dai->capture.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= cpu_dai->capture.rates;
		if (cpu_dai->capture.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= codec_dai->capture.rates;
F
Frank Mandarino 已提交
436 437 438 439 440
	}

	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
441
			codec_dai->name, cpu_dai->name);
442
		goto config_err;
F
Frank Mandarino 已提交
443 444 445
	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
446
			codec_dai->name, cpu_dai->name);
447
		goto config_err;
F
Frank Mandarino 已提交
448 449 450
	}
	if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
451
			codec_dai->name, cpu_dai->name);
452
		goto config_err;
F
Frank Mandarino 已提交
453 454
	}

455 456 457 458
	/* 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)
459
			goto config_err;
460 461
	}

462 463 464 465 466 467
	pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
	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
468

469 470 471 472 473 474 475 476 477
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		cpu_dai->playback.active++;
		codec_dai->playback.active++;
	} else {
		cpu_dai->capture.active++;
		codec_dai->capture.active++;
	}
	cpu_dai->active++;
	codec_dai->active++;
478
	card->codec->active++;
F
Frank Mandarino 已提交
479 480 481
	mutex_unlock(&pcm_mutex);
	return 0;

482
config_err:
F
Frank Mandarino 已提交
483 484 485
	if (machine->ops && machine->ops->shutdown)
		machine->ops->shutdown(substream);

486 487 488 489
machine_err:
	if (codec_dai->ops->shutdown)
		codec_dai->ops->shutdown(substream, codec_dai);

490
codec_dai_err:
F
Frank Mandarino 已提交
491 492 493 494
	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);

platform_err:
495 496
	if (cpu_dai->ops->shutdown)
		cpu_dai->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
497 498 499 500 501 502
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
503
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
504 505 506
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
507
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
508
{
509 510
	struct snd_soc_card *card = container_of(work, struct snd_soc_card,
						 delayed_work.work);
511
	struct snd_soc_codec *codec = card->codec;
512
	struct snd_soc_dai *codec_dai;
F
Frank Mandarino 已提交
513 514 515
	int i;

	mutex_lock(&pcm_mutex);
516
	for (i = 0; i < codec->num_dai; i++) {
F
Frank Mandarino 已提交
517 518
		codec_dai = &codec->dai[i];

519 520 521 522
		pr_debug("pop wq checking: %s status: %s waiting: %s\n",
			 codec_dai->playback.stream_name,
			 codec_dai->playback.active ? "active" : "inactive",
			 codec_dai->pop_wait ? "yes" : "no");
F
Frank Mandarino 已提交
523 524 525 526

		/* are we waiting on this codec DAI stream */
		if (codec_dai->pop_wait == 1) {
			codec_dai->pop_wait = 0;
527 528
			snd_soc_dapm_stream_event(codec,
				codec_dai->playback.stream_name,
F
Frank Mandarino 已提交
529 530 531 532 533 534 535 536 537 538 539 540 541 542 543
				SND_SOC_DAPM_STREAM_STOP);
		}
	}
	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;
	struct snd_soc_device *socdev = rtd->socdev;
544
	struct snd_soc_card *card = socdev->card;
545
	struct snd_soc_dai_link *machine = rtd->dai;
546
	struct snd_soc_platform *platform = card->platform;
547 548
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
549
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
550 551 552

	mutex_lock(&pcm_mutex);

553 554 555 556 557 558
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		cpu_dai->playback.active--;
		codec_dai->playback.active--;
	} else {
		cpu_dai->capture.active--;
		codec_dai->capture.active--;
F
Frank Mandarino 已提交
559
	}
560 561 562

	cpu_dai->active--;
	codec_dai->active--;
F
Frank Mandarino 已提交
563 564
	codec->active--;

565 566 567 568 569 570
	/* 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);

571 572
	if (cpu_dai->ops->shutdown)
		cpu_dai->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
573

574 575
	if (codec_dai->ops->shutdown)
		codec_dai->ops->shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
576 577 578 579 580 581 582 583 584

	if (machine->ops && machine->ops->shutdown)
		machine->ops->shutdown(substream);

	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
585
		codec_dai->pop_wait = 1;
586
		schedule_delayed_work(&card->delayed_work,
587
			msecs_to_jiffies(card->pmdown_time));
F
Frank Mandarino 已提交
588 589
	} else {
		/* capture streams can be powered down now */
590
		snd_soc_dapm_stream_event(codec,
591 592
			codec_dai->capture.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
593 594 595 596 597 598 599 600 601 602 603 604 605 606 607
	}

	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;
	struct snd_soc_device *socdev = rtd->socdev;
608
	struct snd_soc_card *card = socdev->card;
609
	struct snd_soc_dai_link *machine = rtd->dai;
610
	struct snd_soc_platform *platform = card->platform;
611 612
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
613
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
614 615 616
	int ret = 0;

	mutex_lock(&pcm_mutex);
617 618 619 620 621 622 623 624 625

	if (machine->ops && machine->ops->prepare) {
		ret = machine->ops->prepare(substream);
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine prepare error\n");
			goto out;
		}
	}

F
Frank Mandarino 已提交
626 627
	if (platform->pcm_ops->prepare) {
		ret = platform->pcm_ops->prepare(substream);
628 629
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
630
			goto out;
631
		}
F
Frank Mandarino 已提交
632 633
	}

634 635
	if (codec_dai->ops->prepare) {
		ret = codec_dai->ops->prepare(substream, codec_dai);
636 637
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
638
			goto out;
639
		}
F
Frank Mandarino 已提交
640 641
	}

642 643
	if (cpu_dai->ops->prepare) {
		ret = cpu_dai->ops->prepare(substream, cpu_dai);
644 645 646 647 648
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
649

650 651 652 653
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
654
		cancel_delayed_work(&card->delayed_work);
655
	}
F
Frank Mandarino 已提交
656

657 658 659 660 661 662 663 664
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		snd_soc_dapm_stream_event(codec,
					  codec_dai->playback.stream_name,
					  SND_SOC_DAPM_STREAM_START);
	else
		snd_soc_dapm_stream_event(codec,
					  codec_dai->capture.stream_name,
					  SND_SOC_DAPM_STREAM_START);
665

666
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682

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;
	struct snd_soc_device *socdev = rtd->socdev;
683
	struct snd_soc_dai_link *machine = rtd->dai;
684 685
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
686 687
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
688 689 690 691
	int ret = 0;

	mutex_lock(&pcm_mutex);

692 693 694 695
	if (machine->ops && machine->ops->hw_params) {
		ret = machine->ops->hw_params(substream, params);
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
Frank Mandarino 已提交
696
			goto out;
697
		}
F
Frank Mandarino 已提交
698 699
	}

700 701
	if (codec_dai->ops->hw_params) {
		ret = codec_dai->ops->hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
702 703
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
704 705
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
706 707 708
		}
	}

709 710
	if (cpu_dai->ops->hw_params) {
		ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
711
		if (ret < 0) {
712
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
713
				cpu_dai->name);
F
Frank Mandarino 已提交
714 715 716 717 718 719 720
			goto interface_err;
		}
	}

	if (platform->pcm_ops->hw_params) {
		ret = platform->pcm_ops->hw_params(substream, params);
		if (ret < 0) {
721
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
722 723 724 725 726
				platform->name);
			goto platform_err;
		}
	}

727 728
	machine->rate = params_rate(params);

F
Frank Mandarino 已提交
729 730 731 732 733
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
734 735
	if (cpu_dai->ops->hw_free)
		cpu_dai->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
736 737

interface_err:
738 739
	if (codec_dai->ops->hw_free)
		codec_dai->ops->hw_free(substream, codec_dai);
740 741

codec_err:
742
	if (machine->ops && machine->ops->hw_free)
743
		machine->ops->hw_free(substream);
F
Frank Mandarino 已提交
744 745 746 747 748 749 750 751 752 753 754 755

	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
 * Free's resources allocated by hw_params, can be called multiple times
 */
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
756
	struct snd_soc_dai_link *machine = rtd->dai;
757 758
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
759 760
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
761
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
762 763 764 765

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
766 767
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
768 769 770 771 772 773 774 775 776 777

	/* free any machine hw params */
	if (machine->ops && machine->ops->hw_free)
		machine->ops->hw_free(substream);

	/* free any DMA resources */
	if (platform->pcm_ops->hw_free)
		platform->pcm_ops->hw_free(substream);

	/* now free hw params for the DAI's  */
778 779
	if (codec_dai->ops->hw_free)
		codec_dai->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
780

781 782
	if (cpu_dai->ops->hw_free)
		cpu_dai->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
783 784 785 786 787 788 789 790 791

	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;
	struct snd_soc_device *socdev = rtd->socdev;
792
	struct snd_soc_card *card= socdev->card;
793
	struct snd_soc_dai_link *machine = rtd->dai;
794
	struct snd_soc_platform *platform = card->platform;
795 796
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
797 798
	int ret;

799 800
	if (codec_dai->ops->trigger) {
		ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
801 802 803 804 805 806 807 808 809 810
		if (ret < 0)
			return ret;
	}

	if (platform->pcm_ops->trigger) {
		ret = platform->pcm_ops->trigger(substream, cmd);
		if (ret < 0)
			return ret;
	}

811 812
	if (cpu_dai->ops->trigger) {
		ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
813 814 815 816 817 818
		if (ret < 0)
			return ret;
	}
	return 0;
}

819 820
/*
 * soc level wrapper for pointer callback
821 822
 * If cpu_dai, codec_dai, platform driver has the delay callback, than
 * the runtime->delay will be updated accordingly.
823 824 825 826 827 828 829
 */
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
830 831 832 833
	struct snd_soc_dai_link *machine = rtd->dai;
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
	struct snd_pcm_runtime *runtime = substream->runtime;
834
	snd_pcm_uframes_t offset = 0;
835
	snd_pcm_sframes_t delay = 0;
836 837 838 839

	if (platform->pcm_ops->pointer)
		offset = platform->pcm_ops->pointer(substream);

840 841 842 843 844 845 846 847 848 849 850
	if (cpu_dai->ops->delay)
		delay += cpu_dai->ops->delay(substream, cpu_dai);

	if (codec_dai->ops->delay)
		delay += codec_dai->ops->delay(substream, codec_dai);

	if (platform->delay)
		delay += platform->delay(substream, codec_dai);

	runtime->delay = delay;

851 852 853
	return offset;
}

F
Frank Mandarino 已提交
854 855 856 857 858 859 860 861
/* 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,
862
	.pointer	= soc_pcm_pointer,
F
Frank Mandarino 已提交
863 864 865 866
};

#ifdef CONFIG_PM
/* powers down audio subsystem for suspend */
M
Mark Brown 已提交
867
static int soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
868
{
M
Mark Brown 已提交
869
	struct platform_device *pdev = to_platform_device(dev);
870
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
871
	struct snd_soc_card *card = socdev->card;
872
	struct snd_soc_platform *platform = card->platform;
873
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
874
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
875 876
	int i;

877 878 879 880 881 882
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
	if (!codec)
		return 0;

883 884 885 886 887 888 889 890 891 892
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
	snd_power_lock(codec->card);
	snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(codec->card);

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

F
Frank Mandarino 已提交
893
	/* mute any active DAC's */
894 895
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
896 897
		if (dai->ops->digital_mute && dai->playback.active)
			dai->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
898 899
	}

900
	/* suspend all pcms */
901 902
	for (i = 0; i < card->num_links; i++)
		snd_pcm_suspend_all(card->dai_link[i].pcm);
903

904
	if (card->suspend_pre)
M
Mark Brown 已提交
905
		card->suspend_pre(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
906

907 908
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai  *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
909
		if (cpu_dai->suspend && !cpu_dai->ac97_control)
910
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
911
		if (platform->suspend)
912
			platform->suspend(&card->dai_link[i]);
F
Frank Mandarino 已提交
913 914 915
	}

	/* close any waiting streams and save state */
916
	run_delayed_work(&card->delayed_work);
917
	codec->suspend_bias_level = codec->bias_level;
F
Frank Mandarino 已提交
918

919
	for (i = 0; i < codec->num_dai; i++) {
F
Frank Mandarino 已提交
920 921 922 923 924 925 926 927 928 929 930
		char *stream = codec->dai[i].playback.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_SUSPEND);
		stream = codec->dai[i].capture.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

	if (codec_dev->suspend)
M
Mark Brown 已提交
931
		codec_dev->suspend(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
932

933 934
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
935
		if (cpu_dai->suspend && cpu_dai->ac97_control)
936
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
937 938
	}

939
	if (card->suspend_post)
M
Mark Brown 已提交
940
		card->suspend_post(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
941 942 943 944

	return 0;
}

945 946 947 948
/* 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
949
{
950 951 952 953
	struct snd_soc_card *card = container_of(work,
						 struct snd_soc_card,
						 deferred_resume_work);
	struct snd_soc_device *socdev = card->socdev;
954
	struct snd_soc_platform *platform = card->platform;
955
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
956
	struct snd_soc_codec *codec = card->codec;
957
	struct platform_device *pdev = to_platform_device(socdev->dev);
F
Frank Mandarino 已提交
958 959
	int i;

960 961 962 963
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

964
	dev_dbg(socdev->dev, "starting resume work\n");
965

966 967
	if (card->resume_pre)
		card->resume_pre(pdev);
F
Frank Mandarino 已提交
968

969 970
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
971
		if (cpu_dai->resume && cpu_dai->ac97_control)
972
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
973 974 975 976 977
	}

	if (codec_dev->resume)
		codec_dev->resume(pdev);

978 979
	for (i = 0; i < codec->num_dai; i++) {
		char *stream = codec->dai[i].playback.stream_name;
F
Frank Mandarino 已提交
980 981 982 983 984 985 986 987 988
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_RESUME);
		stream = codec->dai[i].capture.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_RESUME);
	}

989
	/* unmute any active DACs */
990 991
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
992 993
		if (dai->ops->digital_mute && dai->playback.active)
			dai->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
994 995
	}

996 997
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
998
		if (cpu_dai->resume && !cpu_dai->ac97_control)
999
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
1000
		if (platform->resume)
1001
			platform->resume(&card->dai_link[i]);
F
Frank Mandarino 已提交
1002 1003
	}

1004 1005
	if (card->resume_post)
		card->resume_post(pdev);
F
Frank Mandarino 已提交
1006

1007
	dev_dbg(socdev->dev, "resume work completed\n");
1008 1009 1010 1011 1012 1013

	/* userspace can access us now we are back as we were before */
	snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
}

/* powers up audio subsystem after a suspend */
M
Mark Brown 已提交
1014
static int soc_resume(struct device *dev)
1015
{
M
Mark Brown 已提交
1016
	struct platform_device *pdev = to_platform_device(dev);
1017
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1018
	struct snd_soc_card *card = socdev->card;
1019
	struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
1020

1021 1022 1023 1024 1025 1026
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
	if (!card->codec)
		return 0;

1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
	/* 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.
	 */
	if (cpu_dai->ac97_control) {
		dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
		soc_resume_deferred(&card->deferred_resume_work);
	} else {
		dev_dbg(socdev->dev, "Scheduling resume work\n");
		if (!schedule_work(&card->deferred_resume_work))
			dev_err(socdev->dev, "resume work item may be lost\n");
	}
1040

F
Frank Mandarino 已提交
1041 1042 1043 1044 1045 1046 1047
	return 0;
}
#else
#define soc_suspend	NULL
#define soc_resume	NULL
#endif

1048 1049 1050
static struct snd_soc_dai_ops null_dai_ops = {
};

1051
static void snd_soc_instantiate_card(struct snd_soc_card *card)
F
Frank Mandarino 已提交
1052
{
1053 1054 1055 1056
	struct platform_device *pdev = container_of(card->dev,
						    struct platform_device,
						    dev);
	struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
M
Mark Brown 已提交
1057
	struct snd_soc_codec *codec;
1058 1059
	struct snd_soc_platform *platform;
	struct snd_soc_dai *dai;
1060
	int i, found, ret, ac97;
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075

	if (card->instantiated)
		return;

	found = 0;
	list_for_each_entry(platform, &platform_list, list)
		if (card->platform == platform) {
			found = 1;
			break;
		}
	if (!found) {
		dev_dbg(card->dev, "Platform %s not registered\n",
			card->platform->name);
		return;
	}
1076

1077
	ac97 = 0;
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
	for (i = 0; i < card->num_links; i++) {
		found = 0;
		list_for_each_entry(dai, &dai_list, list)
			if (card->dai_link[i].cpu_dai == dai) {
				found = 1;
				break;
			}
		if (!found) {
			dev_dbg(card->dev, "DAI %s not registered\n",
				card->dai_link[i].cpu_dai->name);
			return;
		}
1090 1091 1092

		if (card->dai_link[i].cpu_dai->ac97_control)
			ac97 = 1;
M
Mark Brown 已提交
1093 1094
	}

1095 1096 1097 1098 1099
	for (i = 0; i < card->num_links; i++) {
		if (!card->dai_link[i].codec_dai->ops)
			card->dai_link[i].codec_dai->ops = &null_dai_ops;
	}

1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
	/* If we have AC97 in the system then don't wait for the
	 * codec.  This will need revisiting if we have to handle
	 * systems with mixed AC97 and non-AC97 parts.  Only check for
	 * DAIs currently; we can't do this per link since some AC97
	 * codecs have non-AC97 DAIs.
	 */
	if (!ac97)
		for (i = 0; i < card->num_links; i++) {
			found = 0;
			list_for_each_entry(dai, &dai_list, list)
				if (card->dai_link[i].codec_dai == dai) {
					found = 1;
					break;
				}
			if (!found) {
				dev_dbg(card->dev, "DAI %s not registered\n",
					card->dai_link[i].codec_dai->name);
				return;
			}
		}

1121 1122 1123 1124 1125
	/* Note that we do not current check for codec components */

	dev_dbg(card->dev, "All components present, instantiating\n");

	/* Found everything, bring it up */
1126 1127
	card->pmdown_time = pmdown_time;

1128 1129
	if (card->probe) {
		ret = card->probe(pdev);
1130
		if (ret < 0)
1131
			return;
F
Frank Mandarino 已提交
1132 1133
	}

1134 1135
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
F
Frank Mandarino 已提交
1136
		if (cpu_dai->probe) {
1137
			ret = cpu_dai->probe(pdev, cpu_dai);
1138
			if (ret < 0)
F
Frank Mandarino 已提交
1139 1140 1141 1142 1143 1144
				goto cpu_dai_err;
		}
	}

	if (codec_dev->probe) {
		ret = codec_dev->probe(pdev);
1145
		if (ret < 0)
F
Frank Mandarino 已提交
1146 1147
			goto cpu_dai_err;
	}
M
Mark Brown 已提交
1148
	codec = card->codec;
F
Frank Mandarino 已提交
1149 1150 1151

	if (platform->probe) {
		ret = platform->probe(pdev);
1152
		if (ret < 0)
F
Frank Mandarino 已提交
1153 1154 1155 1156
			goto platform_err;
	}

	/* DAPM stream work */
1157
	INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
R
Randy Dunlap 已提交
1158
#ifdef CONFIG_PM
1159
	/* deferred resume work */
1160
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
R
Randy Dunlap 已提交
1161
#endif
1162

M
Mark Brown 已提交
1163 1164 1165 1166 1167 1168 1169 1170 1171
	for (i = 0; i < card->num_links; i++) {
		if (card->dai_link[i].init) {
			ret = card->dai_link[i].init(codec);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to init %s\n",
					card->dai_link[i].stream_name);
				continue;
			}
		}
1172
		if (card->dai_link[i].codec_dai->ac97_control)
M
Mark Brown 已提交
1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210
			ac97 = 1;
	}

	snprintf(codec->card->shortname, sizeof(codec->card->shortname),
		 "%s",  card->name);
	snprintf(codec->card->longname, sizeof(codec->card->longname),
		 "%s (%s)", card->name, codec->name);

	/* Make sure all DAPM widgets are instantiated */
	snd_soc_dapm_new_widgets(codec);

	ret = snd_card_register(codec->card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
				codec->name);
		goto card_err;
	}

	mutex_lock(&codec->mutex);
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
	if (ac97 && strcmp(codec->name, "AC97") != 0) {
		ret = soc_ac97_dev_register(codec);
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
			snd_card_free(codec->card);
			mutex_unlock(&codec->mutex);
			goto card_err;
		}
	}
#endif

	ret = snd_soc_dapm_sys_add(card->socdev->dev);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");

1211 1212 1213 1214
	ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");

M
Mark Brown 已提交
1215 1216 1217 1218 1219 1220 1221
	ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");

	soc_init_codec_debugfs(codec);
	mutex_unlock(&codec->mutex);

1222 1223 1224
	card->instantiated = 1;

	return;
F
Frank Mandarino 已提交
1225

M
Mark Brown 已提交
1226 1227 1228 1229
card_err:
	if (platform->remove)
		platform->remove(pdev);

F
Frank Mandarino 已提交
1230 1231 1232 1233 1234
platform_err:
	if (codec_dev->remove)
		codec_dev->remove(pdev);

cpu_dai_err:
1235
	for (i--; i >= 0; i--) {
1236
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
F
Frank Mandarino 已提交
1237
		if (cpu_dai->remove)
1238
			cpu_dai->remove(pdev, cpu_dai);
F
Frank Mandarino 已提交
1239 1240
	}

1241 1242
	if (card->remove)
		card->remove(pdev);
1243
}
F
Frank Mandarino 已提交
1244

1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274
/*
 * Attempt to initialise any uninitalised cards.  Must be called with
 * 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)
{
	int ret = 0;
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_card *card = socdev->card;

	/* Bodge while we push things out of socdev */
	card->socdev = socdev;

	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
	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
1275 1276 1277 1278 1279 1280 1281
}

/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
	int i;
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1282
	struct snd_soc_card *card = socdev->card;
1283
	struct snd_soc_platform *platform = card->platform;
F
Frank Mandarino 已提交
1284 1285
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;

1286 1287
	if (card->instantiated) {
		run_delayed_work(&card->delayed_work);
1288

1289 1290
		if (platform->remove)
			platform->remove(pdev);
1291

1292 1293
		if (codec_dev->remove)
			codec_dev->remove(pdev);
F
Frank Mandarino 已提交
1294

1295 1296 1297 1298 1299
		for (i = 0; i < card->num_links; i++) {
			struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
			if (cpu_dai->remove)
				cpu_dai->remove(pdev, cpu_dai);
		}
F
Frank Mandarino 已提交
1300

1301 1302
		if (card->remove)
			card->remove(pdev);
F
Frank Mandarino 已提交
1303 1304
	}

M
Mark Brown 已提交
1305 1306
	snd_soc_unregister_card(card);

F
Frank Mandarino 已提交
1307 1308 1309
	return 0;
}

M
Mark Brown 已提交
1310
static int soc_poweroff(struct device *dev)
M
Mark Brown 已提交
1311
{
M
Mark Brown 已提交
1312
	struct platform_device *pdev = to_platform_device(dev);
M
Mark Brown 已提交
1313 1314 1315 1316
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_card *card = socdev->card;

	if (!card->instantiated)
M
Mark Brown 已提交
1317
		return 0;
M
Mark Brown 已提交
1318 1319 1320 1321 1322 1323

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
	run_delayed_work(&card->delayed_work);

	snd_soc_dapm_shutdown(socdev);
M
Mark Brown 已提交
1324 1325

	return 0;
M
Mark Brown 已提交
1326 1327
}

1328
static const struct dev_pm_ops soc_pm_ops = {
M
Mark Brown 已提交
1329 1330 1331 1332 1333
	.suspend = soc_suspend,
	.resume = soc_resume,
	.poweroff = soc_poweroff,
};

F
Frank Mandarino 已提交
1334 1335 1336 1337
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
1338
		.owner		= THIS_MODULE,
M
Mark Brown 已提交
1339
		.pm		= &soc_pm_ops,
F
Frank Mandarino 已提交
1340 1341 1342 1343 1344 1345 1346 1347 1348
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/* create a new pcm */
static int soc_new_pcm(struct snd_soc_device *socdev,
	struct snd_soc_dai_link *dai_link, int num)
{
1349
	struct snd_soc_card *card = socdev->card;
1350
	struct snd_soc_codec *codec = card->codec;
1351
	struct snd_soc_platform *platform = card->platform;
1352 1353
	struct snd_soc_dai *codec_dai = dai_link->codec_dai;
	struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
F
Frank Mandarino 已提交
1354 1355 1356 1357 1358 1359 1360 1361
	struct snd_soc_pcm_runtime *rtd;
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
	if (rtd == NULL)
		return -ENOMEM;
1362 1363

	rtd->dai = dai_link;
F
Frank Mandarino 已提交
1364
	rtd->socdev = socdev;
1365
	codec_dai->codec = card->codec;
F
Frank Mandarino 已提交
1366 1367

	/* check client and interface hw capabilities */
1368 1369
	snprintf(new_name, sizeof(new_name), "%s %s-%d",
		 dai_link->stream_name, codec_dai->name, num);
F
Frank Mandarino 已提交
1370 1371 1372 1373 1374 1375 1376 1377 1378

	if (codec_dai->playback.channels_min)
		playback = 1;
	if (codec_dai->capture.channels_min)
		capture = 1;

	ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
		capture, &pcm);
	if (ret < 0) {
1379 1380
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
			codec->name);
F
Frank Mandarino 已提交
1381 1382 1383 1384
		kfree(rtd);
		return ret;
	}

1385
	dai_link->pcm = pcm;
F
Frank Mandarino 已提交
1386
	pcm->private_data = rtd;
1387 1388 1389 1390 1391 1392
	soc_pcm_ops.mmap = platform->pcm_ops->mmap;
	soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
	soc_pcm_ops.copy = platform->pcm_ops->copy;
	soc_pcm_ops.silence = platform->pcm_ops->silence;
	soc_pcm_ops.ack = platform->pcm_ops->ack;
	soc_pcm_ops.page = platform->pcm_ops->page;
F
Frank Mandarino 已提交
1393 1394 1395 1396 1397 1398 1399

	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);

1400
	ret = platform->pcm_new(codec->card, codec_dai, pcm);
F
Frank Mandarino 已提交
1401 1402 1403 1404 1405 1406
	if (ret < 0) {
		printk(KERN_ERR "asoc: platform pcm constructor failed\n");
		kfree(rtd);
		return ret;
	}

1407
	pcm->private_free = platform->pcm_free;
F
Frank Mandarino 已提交
1408 1409 1410 1411 1412
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429
/**
 * 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.
 */
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
{
	if (codec->volatile_register)
		return codec->volatile_register(reg);
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

F
Frank Mandarino 已提交
1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458
/**
 * 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;
1459
	codec->dev = &codec->ac97->dev;
F
Frank Mandarino 已提交
1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492
	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);
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
 * Returns 1 for change else 0.
 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1493
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1494 1495
{
	int change;
1496
	unsigned int old, new;
F
Frank Mandarino 已提交
1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507

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

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);

1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518
/**
 * 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.
 */
1519 1520 1521
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
1522 1523 1524 1525 1526 1527 1528 1529 1530
{
	int change;

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

	return change;
}
1531
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1532

F
Frank Mandarino 已提交
1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
/**
 * 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,
1546
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1547 1548
{
	int change;
1549
	unsigned int old, new;
F
Frank Mandarino 已提交
1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561

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

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

/**
 * snd_soc_new_pcms - create new sound card and pcms
 * @socdev: the SoC audio device
M
Mark Brown 已提交
1562 1563
 * @idx: ALSA card index
 * @xid: card identification
F
Frank Mandarino 已提交
1564 1565 1566 1567 1568
 *
 * Create a new sound card based upon the codec and interface pcms.
 *
 * Returns 0 for success, else error.
 */
1569
int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
F
Frank Mandarino 已提交
1570
{
1571
	struct snd_soc_card *card = socdev->card;
1572
	struct snd_soc_codec *codec = card->codec;
1573
	int ret, i;
F
Frank Mandarino 已提交
1574 1575 1576 1577

	mutex_lock(&codec->mutex);

	/* register a sound card */
1578 1579
	ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
	if (ret < 0) {
F
Frank Mandarino 已提交
1580 1581 1582
		printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
			codec->name);
		mutex_unlock(&codec->mutex);
1583
		return ret;
F
Frank Mandarino 已提交
1584 1585
	}

1586
	codec->socdev = socdev;
F
Frank Mandarino 已提交
1587 1588 1589 1590 1591
	codec->card->dev = socdev->dev;
	codec->card->private_data = codec;
	strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));

	/* create the pcms */
1592 1593
	for (i = 0; i < card->num_links; i++) {
		ret = soc_new_pcm(socdev, &card->dai_link[i], i);
F
Frank Mandarino 已提交
1594 1595
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't create pcm %s\n",
1596
				card->dai_link[i].stream_name);
F
Frank Mandarino 已提交
1597 1598 1599
			mutex_unlock(&codec->mutex);
			return ret;
		}
1600 1601
		/* Check for codec->ac97 to handle the ac97.c fun */
		if (card->dai_link[i].codec_dai->ac97_control && codec->ac97) {
1602 1603 1604
			snd_ac97_dev_add_pdata(codec->ac97,
				card->dai_link[i].cpu_dai->ac97_pdata);
		}
F
Frank Mandarino 已提交
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
	}

	mutex_unlock(&codec->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_new_pcms);

/**
 * snd_soc_free_pcms - free sound card and pcms
 * @socdev: the SoC audio device
 *
 * Frees sound card and pcms associated with the socdev.
 * Also unregister the codec if it is an AC97 device.
 */
void snd_soc_free_pcms(struct snd_soc_device *socdev)
{
1621
	struct snd_soc_codec *codec = socdev->card->codec;
1622
#ifdef CONFIG_SND_SOC_AC97_BUS
1623
	struct snd_soc_dai *codec_dai;
1624 1625
	int i;
#endif
F
Frank Mandarino 已提交
1626 1627

	mutex_lock(&codec->mutex);
1628
	soc_cleanup_codec_debugfs(codec);
F
Frank Mandarino 已提交
1629
#ifdef CONFIG_SND_SOC_AC97_BUS
1630
	for (i = 0; i < codec->num_dai; i++) {
1631
		codec_dai = &codec->dai[i];
1632 1633
		if (codec_dai->ac97_control && codec->ac97 &&
		    strcmp(codec->name, "AC97") != 0) {
1634 1635 1636 1637 1638
			soc_ac97_dev_unregister(codec);
			goto free_card;
		}
	}
free_card:
F
Frank Mandarino 已提交
1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674
#endif

	if (codec->card)
		snd_card_free(codec->card);
	device_remove_file(socdev->dev, &dev_attr_codec_reg);
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_pcms);

/**
 * 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
1675
 * @long_name: control long name
F
Frank Mandarino 已提交
1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694
 *
 * 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,
	void *data, char *long_name)
{
	struct snd_kcontrol_new template;

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

	return snd_ctl_new1(&template, data);
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

I
Ian Molton 已提交
1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725
/**
 * 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)
{
	struct snd_card *card = codec->card;
	int err, i;

	for (i = 0; i < num_controls; i++) {
		const struct snd_kcontrol_new *control = &controls[i];
		err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
		if (err < 0) {
			dev_err(codec->dev, "%s: Failed to add %s\n",
				codec->name, control->name);
			return err;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_controls);

F
Frank Mandarino 已提交
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742
/**
 * 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;
1743
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1744

1745 1746
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1747 1748 1749 1750 1751 1752 1753 1754 1755
	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
1756
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1757 1758 1759 1760 1761 1762 1763 1764 1765 1766
 *
 * 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;
1767
	unsigned int val, bitmask;
F
Frank Mandarino 已提交
1768

1769
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1770 1771
		;
	val = snd_soc_read(codec, e->reg);
1772 1773
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
F
Frank Mandarino 已提交
1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784
	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
1785
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1786 1787 1788 1789 1790 1791 1792 1793 1794 1795
 *
 * 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;
1796 1797
	unsigned int val;
	unsigned int mask, bitmask;
F
Frank Mandarino 已提交
1798

1799
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1800
		;
1801
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
1802 1803 1804 1805
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
1806
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
Frank Mandarino 已提交
1807 1808 1809 1810 1811
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

1812
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
F
Frank Mandarino 已提交
1813 1814 1815
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831
/**
 * 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);
1832
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1833
	unsigned int reg_val, val, mux;
P
Peter Ujfalusi 已提交
1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870

	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);
1871
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1872 1873
	unsigned int val;
	unsigned int mask;
P
Peter Ujfalusi 已提交
1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885

	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;
	}

1886
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
P
Peter Ujfalusi 已提交
1887 1888 1889
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

F
Frank Mandarino 已提交
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906
/**
 * 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;
1907
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1908

1909 1910
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928
	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
1929 1930
	int max = kcontrol->private_value;

1931
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
1932 1933 1934
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
1935 1936 1937

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1938
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954
	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)
{
1955 1956 1957
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
1958
	unsigned int shift = mc->shift;
1959
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
1960

1961
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
1962 1963 1964 1965
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
Frank Mandarino 已提交
1966 1967
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1968
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1969 1970 1971 1972 1973 1974 1975
	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
1976
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1977 1978 1979 1980 1981 1982 1983 1984
 *
 * 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)
{
1985 1986
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
1987
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1988 1989 1990
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
1991
	int max = mc->max;
1992 1993
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
1994 1995 1996 1997 1998 1999 2000 2001

	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
2002
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2003 2004
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2005
				max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2006 2007 2008 2009 2010 2011 2012 2013 2014
	}

	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
2015
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2016 2017 2018 2019 2020 2021 2022 2023
 *
 * 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)
{
2024 2025
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2026
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2027 2028 2029
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2030
	int max = mc->max;
2031 2032
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2033
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2034 2035 2036

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
2037
		val = max - val;
F
Frank Mandarino 已提交
2038 2039 2040 2041 2042
	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
2043
			val2 = max - val2;
F
Frank Mandarino 已提交
2044 2045 2046
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
2047
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
F
Frank Mandarino 已提交
2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063
}
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)
{
2064 2065 2066
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
P
Philipp Zabel 已提交
2067

2068
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2069 2070 2071
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2072 2073 2074

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
2075
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
2076 2077 2078 2079 2080 2081 2082
	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
2083
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2084 2085 2086 2087 2088 2089 2090 2091
 *
 * 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)
{
2092 2093
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2094
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2095 2096 2097
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2098
	int max = mc->max;
2099
	unsigned int mask = (1 << fls(max)) - 1;
2100
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2101 2102 2103 2104 2105 2106 2107

	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
2108
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2109
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2110
			max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2111 2112 2113 2114 2115 2116 2117 2118 2119
	}

	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
2120
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2121 2122 2123 2124 2125 2126 2127 2128
 *
 * 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)
{
2129 2130
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2131
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2132 2133 2134
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2135
	int max = mc->max;
2136 2137
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2138
	int err;
2139
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2140 2141 2142 2143 2144 2145

	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
2146 2147
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
2148 2149 2150 2151 2152
	}

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

2153
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2154
	if (err < 0)
F
Frank Mandarino 已提交
2155 2156
		return err;

2157
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
F
Frank Mandarino 已提交
2158 2159 2160 2161
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173
/**
 * 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)
{
2174 2175 2176 2177
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;
2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189

	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_s8);

/**
 * snd_soc_get_volsw_s8 - signed mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2190
 * @ucontrol: control element information
2191 2192 2193 2194 2195 2196 2197 2198
 *
 * 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)
{
2199 2200
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2201
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2202
	unsigned int reg = mc->reg;
2203
	int min = mc->min;
2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216
	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
2217
 * @ucontrol: control element information
2218 2219 2220 2221 2222 2223 2224 2225
 *
 * 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)
{
2226 2227
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2228
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2229
	unsigned int reg = mc->reg;
2230
	int min = mc->min;
2231
	unsigned int val;
2232 2233 2234 2235

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

2236
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2237 2238 2239
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251
/**
 * 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)
{
2252
	if (dai->ops && dai->ops->set_sysclk)
2253
		return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2254 2255 2256 2257 2258 2259 2260 2261
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
2262
 * @div_id: DAI specific clock divider ID
2263 2264 2265 2266 2267 2268 2269 2270 2271
 * @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)
{
2272
	if (dai->ops && dai->ops->set_clkdiv)
2273
		return dai->ops->set_clkdiv(dai, div_id, div);
2274 2275 2276 2277 2278 2279 2280 2281 2282
	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
2283
 * @source: DAI specific source for the PLL
2284 2285 2286 2287 2288
 * @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.
 */
2289 2290
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
2291
{
2292
	if (dai->ops && dai->ops->set_pll)
2293 2294
		return dai->ops->set_pll(dai, pll_id, source,
					 freq_in, freq_out);
2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

/**
 * 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)
{
2309
	if (dai->ops && dai->ops->set_fmt)
2310
		return dai->ops->set_fmt(dai, fmt);
2311 2312 2313 2314 2315 2316 2317 2318
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
2319 2320
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
2321
 * @slots: Number of slots in use.
2322
 * @slot_width: Width in bits for each slot.
2323 2324 2325 2326 2327
 *
 * 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,
2328
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2329
{
2330
	if (dai->ops && dai->ops->set_tdm_slot)
2331 2332
		return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
				slots, slot_width);
2333 2334 2335 2336 2337
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361
/**
 * 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)
{
	if (dai->ops && dai->ops->set_channel_map)
		return dai->ops->set_channel_map(dai, tx_num, tx_slot,
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

2362 2363 2364 2365 2366 2367 2368 2369 2370
/**
 * 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)
{
2371
	if (dai->ops && dai->ops->set_tristate)
2372
		return dai->ops->set_tristate(dai, tristate);
2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386
	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)
{
2387
	if (dai->ops && dai->ops->digital_mute)
2388
		return dai->ops->digital_mute(dai, mute);
2389 2390 2391 2392 2393
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
2394 2395 2396
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2397
 * @card: Card to register
M
Mark Brown 已提交
2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_register_card(struct snd_soc_card *card)
{
	if (!card->name || !card->dev)
		return -EINVAL;

	INIT_LIST_HEAD(&card->list);
	card->instantiated = 0;

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
2413
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2414 2415 2416 2417 2418 2419 2420 2421 2422 2423
	mutex_unlock(&client_mutex);

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

	return 0;
}

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
2424
 * @card: Card to unregister
M
Mark Brown 已提交
2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_unregister_card(struct snd_soc_card *card)
{
	mutex_lock(&client_mutex);
	list_del(&card->list);
	mutex_unlock(&client_mutex);

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

	return 0;
}

M
Mark Brown 已提交
2441 2442 2443
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
2444
 * @dai: DAI to register
M
Mark Brown 已提交
2445 2446 2447 2448 2449 2450 2451 2452 2453 2454
 */
int snd_soc_register_dai(struct snd_soc_dai *dai)
{
	if (!dai->name)
		return -EINVAL;

	/* The device should become mandatory over time */
	if (!dai->dev)
		printk(KERN_WARNING "No device for DAI %s\n", dai->name);

2455 2456 2457
	if (!dai->ops)
		dai->ops = &null_dai_ops;

M
Mark Brown 已提交
2458 2459 2460 2461
	INIT_LIST_HEAD(&dai->list);

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
2462
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473
	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
2474
 * @dai: DAI to unregister
M
Mark Brown 已提交
2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488
 */
void snd_soc_unregister_dai(struct snd_soc_dai *dai)
{
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered DAI '%s'\n", dai->name);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
2489 2490
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514
 */
int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
{
	int i, ret;

	for (i = 0; i < count; i++) {
		ret = snd_soc_register_dai(&dai[i]);
		if (ret != 0)
			goto err;
	}

	return 0;

err:
	for (i--; i >= 0; i--)
		snd_soc_unregister_dai(&dai[i]);

	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
2515 2516
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
2517 2518 2519 2520 2521 2522 2523 2524 2525 2526
 */
void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
{
	int i;

	for (i = 0; i < count; i++)
		snd_soc_unregister_dai(&dai[i]);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);

M
Mark Brown 已提交
2527 2528 2529
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
2530
 * @platform: platform to register
M
Mark Brown 已提交
2531 2532 2533 2534 2535 2536 2537 2538 2539 2540
 */
int snd_soc_register_platform(struct snd_soc_platform *platform)
{
	if (!platform->name)
		return -EINVAL;

	INIT_LIST_HEAD(&platform->list);

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
2541
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552
	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
2553
 * @platform: platform to unregister
M
Mark Brown 已提交
2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564
 */
void snd_soc_unregister_platform(struct snd_soc_platform *platform)
{
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered platform '%s'\n", platform->name);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597
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
2598 2599 2600
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
2601
 * @codec: codec to register
M
Mark Brown 已提交
2602 2603 2604
 */
int snd_soc_register_codec(struct snd_soc_codec *codec)
{
2605 2606
	int i;

M
Mark Brown 已提交
2607 2608 2609 2610 2611 2612 2613 2614 2615
	if (!codec->name)
		return -EINVAL;

	/* The device should become mandatory over time */
	if (!codec->dev)
		printk(KERN_WARNING "No device for codec %s\n", codec->name);

	INIT_LIST_HEAD(&codec->list);

2616 2617 2618 2619 2620
	for (i = 0; i < codec->num_dai; i++) {
		fixup_codec_formats(&codec->dai[i].playback);
		fixup_codec_formats(&codec->dai[i].capture);
	}

M
Mark Brown 已提交
2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634
	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;
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
2635
 * @codec: codec to unregister
M
Mark Brown 已提交
2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646
 */
void snd_soc_unregister_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

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

2647
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
2648
{
2649 2650 2651 2652 2653 2654 2655 2656 2657
#ifdef CONFIG_DEBUG_FS
	debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(debugfs_root) || !debugfs_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create debugfs directory\n");
		debugfs_root = NULL;
	}
#endif

F
Frank Mandarino 已提交
2658 2659 2660
	return platform_driver_register(&soc_driver);
}

M
Mark Brown 已提交
2661
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
2662
{
2663 2664 2665
#ifdef CONFIG_DEBUG_FS
	debugfs_remove_recursive(debugfs_root);
#endif
2666
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
2667 2668 2669 2670 2671 2672
}

module_init(snd_soc_init);
module_exit(snd_soc_exit);

/* Module information */
2673
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
2674 2675
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
2676
MODULE_ALIAS("platform:soc-audio");