soc-core.c 67.7 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249
/* 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);

#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
250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
#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;
268
	codec->ac97->dev.parent = codec->card->dev;
F
Frank Mandarino 已提交
269 270
	codec->ac97->dev.release = soc_ac97_device_release;

271 272
	dev_set_name(&codec->ac97->dev, "%d-%d:%s",
		     codec->card->number, 0, codec->name);
F
Frank Mandarino 已提交
273 274 275 276 277 278 279 280 281 282
	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

283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
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) {
		dev_dbg(card->dev, "Symmetry forces %dHz rate\n", 
			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
312 313 314 315 316 317 318 319 320
/*
 * 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;
321
	struct snd_soc_card *card = socdev->card;
F
Frank Mandarino 已提交
322
	struct snd_pcm_runtime *runtime = substream->runtime;
323
	struct snd_soc_dai_link *machine = rtd->dai;
324
	struct snd_soc_platform *platform = card->platform;
325 326
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
327 328 329 330 331
	int ret = 0;

	mutex_lock(&pcm_mutex);

	/* startup the audio subsystem */
332 333
	if (cpu_dai->ops->startup) {
		ret = cpu_dai->ops->startup(substream, cpu_dai);
F
Frank Mandarino 已提交
334 335
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open interface %s\n",
336
				cpu_dai->name);
F
Frank Mandarino 已提交
337 338 339 340 341 342 343 344 345 346 347 348
			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;
		}
	}

349 350
	if (codec_dai->ops->startup) {
		ret = codec_dai->ops->startup(substream, codec_dai);
F
Frank Mandarino 已提交
351
		if (ret < 0) {
352 353 354
			printk(KERN_ERR "asoc: can't open codec %s\n",
				codec_dai->name);
			goto codec_dai_err;
F
Frank Mandarino 已提交
355 356 357
		}
	}

358 359
	if (machine->ops && machine->ops->startup) {
		ret = machine->ops->startup(substream);
F
Frank Mandarino 已提交
360
		if (ret < 0) {
361 362
			printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
			goto machine_err;
F
Frank Mandarino 已提交
363 364 365 366 367 368
		}
	}

	/* Check that the codec and cpu DAI's are compatible */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
369 370
			max(codec_dai->playback.rate_min,
			    cpu_dai->playback.rate_min);
F
Frank Mandarino 已提交
371
		runtime->hw.rate_max =
372 373
			min(codec_dai->playback.rate_max,
			    cpu_dai->playback.rate_max);
F
Frank Mandarino 已提交
374
		runtime->hw.channels_min =
375 376
			max(codec_dai->playback.channels_min,
				cpu_dai->playback.channels_min);
F
Frank Mandarino 已提交
377
		runtime->hw.channels_max =
378 379 380 381 382 383
			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;
F
Frank Mandarino 已提交
384 385
	} else {
		runtime->hw.rate_min =
386 387
			max(codec_dai->capture.rate_min,
			    cpu_dai->capture.rate_min);
F
Frank Mandarino 已提交
388
		runtime->hw.rate_max =
389 390
			min(codec_dai->capture.rate_max,
			    cpu_dai->capture.rate_max);
F
Frank Mandarino 已提交
391
		runtime->hw.channels_min =
392 393
			max(codec_dai->capture.channels_min,
				cpu_dai->capture.channels_min);
F
Frank Mandarino 已提交
394
		runtime->hw.channels_max =
395 396 397 398 399 400
			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;
F
Frank Mandarino 已提交
401 402 403 404 405
	}

	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
406 407
			codec_dai->name, cpu_dai->name);
		goto machine_err;
F
Frank Mandarino 已提交
408 409 410
	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
411 412
			codec_dai->name, cpu_dai->name);
		goto machine_err;
F
Frank Mandarino 已提交
413 414 415
	}
	if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
416 417
			codec_dai->name, cpu_dai->name);
		goto machine_err;
F
Frank Mandarino 已提交
418 419
	}

420 421 422 423 424 425 426
	/* 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)
			goto machine_err;
	}

427 428 429 430 431 432
	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
433 434

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
435
		cpu_dai->playback.active = codec_dai->playback.active = 1;
F
Frank Mandarino 已提交
436
	else
437 438 439
		cpu_dai->capture.active = codec_dai->capture.active = 1;
	cpu_dai->active = codec_dai->active = 1;
	cpu_dai->runtime = runtime;
440
	card->codec->active++;
F
Frank Mandarino 已提交
441 442 443
	mutex_unlock(&pcm_mutex);
	return 0;

444
machine_err:
F
Frank Mandarino 已提交
445 446 447
	if (machine->ops && machine->ops->shutdown)
		machine->ops->shutdown(substream);

448
codec_dai_err:
F
Frank Mandarino 已提交
449 450 451 452
	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);

platform_err:
453 454
	if (cpu_dai->ops->shutdown)
		cpu_dai->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
455 456 457 458 459 460
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
461
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
462 463 464
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
465
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
466
{
467 468
	struct snd_soc_card *card = container_of(work, struct snd_soc_card,
						 delayed_work.work);
469
	struct snd_soc_codec *codec = card->codec;
470
	struct snd_soc_dai *codec_dai;
F
Frank Mandarino 已提交
471 472 473
	int i;

	mutex_lock(&pcm_mutex);
474
	for (i = 0; i < codec->num_dai; i++) {
F
Frank Mandarino 已提交
475 476
		codec_dai = &codec->dai[i];

477 478 479 480
		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
481 482 483 484

		/* are we waiting on this codec DAI stream */
		if (codec_dai->pop_wait == 1) {
			codec_dai->pop_wait = 0;
485 486
			snd_soc_dapm_stream_event(codec,
				codec_dai->playback.stream_name,
F
Frank Mandarino 已提交
487 488 489 490 491 492 493 494 495 496 497 498 499 500 501
				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;
502
	struct snd_soc_card *card = socdev->card;
503
	struct snd_soc_dai_link *machine = rtd->dai;
504
	struct snd_soc_platform *platform = card->platform;
505 506
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
507
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
508 509 510 511

	mutex_lock(&pcm_mutex);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
512
		cpu_dai->playback.active = codec_dai->playback.active = 0;
F
Frank Mandarino 已提交
513
	else
514
		cpu_dai->capture.active = codec_dai->capture.active = 0;
F
Frank Mandarino 已提交
515

516 517 518
	if (codec_dai->playback.active == 0 &&
		codec_dai->capture.active == 0) {
		cpu_dai->active = codec_dai->active = 0;
F
Frank Mandarino 已提交
519 520 521
	}
	codec->active--;

522 523 524 525 526 527
	/* 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);

528 529
	if (cpu_dai->ops->shutdown)
		cpu_dai->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
530

531 532
	if (codec_dai->ops->shutdown)
		codec_dai->ops->shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
533 534 535 536 537 538

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

	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);
539
	cpu_dai->runtime = NULL;
F
Frank Mandarino 已提交
540 541 542

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
543
		codec_dai->pop_wait = 1;
544
		schedule_delayed_work(&card->delayed_work,
F
Frank Mandarino 已提交
545 546 547
			msecs_to_jiffies(pmdown_time));
	} else {
		/* capture streams can be powered down now */
548
		snd_soc_dapm_stream_event(codec,
549 550
			codec_dai->capture.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
551 552 553 554 555 556 557 558 559 560 561 562 563 564 565
	}

	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;
566
	struct snd_soc_card *card = socdev->card;
567
	struct snd_soc_dai_link *machine = rtd->dai;
568
	struct snd_soc_platform *platform = card->platform;
569 570
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
571
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
572 573 574
	int ret = 0;

	mutex_lock(&pcm_mutex);
575 576 577 578 579 580 581 582 583

	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
584 585
	if (platform->pcm_ops->prepare) {
		ret = platform->pcm_ops->prepare(substream);
586 587
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
588
			goto out;
589
		}
F
Frank Mandarino 已提交
590 591
	}

592 593
	if (codec_dai->ops->prepare) {
		ret = codec_dai->ops->prepare(substream, codec_dai);
594 595
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
596
			goto out;
597
		}
F
Frank Mandarino 已提交
598 599
	}

600 601
	if (cpu_dai->ops->prepare) {
		ret = cpu_dai->ops->prepare(substream, cpu_dai);
602 603 604 605 606
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
607

608 609 610 611
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
612
		cancel_delayed_work(&card->delayed_work);
613
	}
F
Frank Mandarino 已提交
614

615 616 617 618 619 620 621 622
	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);
623

624
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640

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;
641
	struct snd_soc_dai_link *machine = rtd->dai;
642 643
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
644 645
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
646 647 648 649
	int ret = 0;

	mutex_lock(&pcm_mutex);

650 651 652 653
	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
654
			goto out;
655
		}
F
Frank Mandarino 已提交
656 657
	}

658 659
	if (codec_dai->ops->hw_params) {
		ret = codec_dai->ops->hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
660 661
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
662 663
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
664 665 666
		}
	}

667 668
	if (cpu_dai->ops->hw_params) {
		ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
669
		if (ret < 0) {
670
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
671
				cpu_dai->name);
F
Frank Mandarino 已提交
672 673 674 675 676 677 678
			goto interface_err;
		}
	}

	if (platform->pcm_ops->hw_params) {
		ret = platform->pcm_ops->hw_params(substream, params);
		if (ret < 0) {
679
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
680 681 682 683 684
				platform->name);
			goto platform_err;
		}
	}

685 686
	machine->rate = params_rate(params);

F
Frank Mandarino 已提交
687 688 689 690 691
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
692 693
	if (cpu_dai->ops->hw_free)
		cpu_dai->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
694 695

interface_err:
696 697
	if (codec_dai->ops->hw_free)
		codec_dai->ops->hw_free(substream, codec_dai);
698 699

codec_err:
700
	if (machine->ops && machine->ops->hw_free)
701
		machine->ops->hw_free(substream);
F
Frank Mandarino 已提交
702 703 704 705 706 707 708 709 710 711 712 713

	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;
714
	struct snd_soc_dai_link *machine = rtd->dai;
715 716
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
717 718
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
719
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
720 721 722 723

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
724 725
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
726 727 728 729 730 731 732 733 734 735

	/* 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  */
736 737
	if (codec_dai->ops->hw_free)
		codec_dai->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
738

739 740
	if (cpu_dai->ops->hw_free)
		cpu_dai->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
741 742 743 744 745 746 747 748 749

	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;
750
	struct snd_soc_card *card= socdev->card;
751
	struct snd_soc_dai_link *machine = rtd->dai;
752
	struct snd_soc_platform *platform = card->platform;
753 754
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
755 756
	int ret;

757 758
	if (codec_dai->ops->trigger) {
		ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
759 760 761 762 763 764 765 766 767 768
		if (ret < 0)
			return ret;
	}

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

769 770
	if (cpu_dai->ops->trigger) {
		ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
		if (ret < 0)
			return ret;
	}
	return 0;
}

/* 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,
};

#ifdef CONFIG_PM
/* powers down audio subsystem for suspend */
M
Mark Brown 已提交
789
static int soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
790
{
M
Mark Brown 已提交
791
	struct platform_device *pdev = to_platform_device(dev);
792
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
793
	struct snd_soc_card *card = socdev->card;
794
	struct snd_soc_platform *platform = card->platform;
795
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
796
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
797 798
	int i;

799 800 801 802 803 804
	/* 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;

805 806 807 808 809 810 811 812 813 814
	/* 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
815
	/* mute any active DAC's */
816 817
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
818 819
		if (dai->ops->digital_mute && dai->playback.active)
			dai->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
820 821
	}

822
	/* suspend all pcms */
823 824
	for (i = 0; i < card->num_links; i++)
		snd_pcm_suspend_all(card->dai_link[i].pcm);
825

826
	if (card->suspend_pre)
M
Mark Brown 已提交
827
		card->suspend_pre(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
828

829 830
	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
831
		if (cpu_dai->suspend && !cpu_dai->ac97_control)
832
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
833
		if (platform->suspend)
834
			platform->suspend(cpu_dai);
F
Frank Mandarino 已提交
835 836 837
	}

	/* close any waiting streams and save state */
838
	run_delayed_work(&card->delayed_work);
839
	codec->suspend_bias_level = codec->bias_level;
F
Frank Mandarino 已提交
840

841
	for (i = 0; i < codec->num_dai; i++) {
F
Frank Mandarino 已提交
842 843 844 845 846 847 848 849 850 851 852
		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
853
		codec_dev->suspend(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
854

855 856
	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
857
		if (cpu_dai->suspend && cpu_dai->ac97_control)
858
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
859 860
	}

861
	if (card->suspend_post)
M
Mark Brown 已提交
862
		card->suspend_post(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
863 864 865 866

	return 0;
}

867 868 869 870
/* 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
871
{
872 873 874 875
	struct snd_soc_card *card = container_of(work,
						 struct snd_soc_card,
						 deferred_resume_work);
	struct snd_soc_device *socdev = card->socdev;
876
	struct snd_soc_platform *platform = card->platform;
877
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
878
	struct snd_soc_codec *codec = card->codec;
879
	struct platform_device *pdev = to_platform_device(socdev->dev);
F
Frank Mandarino 已提交
880 881
	int i;

882 883 884 885
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

886
	dev_dbg(socdev->dev, "starting resume work\n");
887

888 889
	if (card->resume_pre)
		card->resume_pre(pdev);
F
Frank Mandarino 已提交
890

891 892
	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
893
		if (cpu_dai->resume && cpu_dai->ac97_control)
894
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
895 896 897 898 899
	}

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

900 901
	for (i = 0; i < codec->num_dai; i++) {
		char *stream = codec->dai[i].playback.stream_name;
F
Frank Mandarino 已提交
902 903 904 905 906 907 908 909 910
		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);
	}

911
	/* unmute any active DACs */
912 913
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
914 915
		if (dai->ops->digital_mute && dai->playback.active)
			dai->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
916 917
	}

918 919
	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
920
		if (cpu_dai->resume && !cpu_dai->ac97_control)
921
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
922
		if (platform->resume)
923
			platform->resume(cpu_dai);
F
Frank Mandarino 已提交
924 925
	}

926 927
	if (card->resume_post)
		card->resume_post(pdev);
F
Frank Mandarino 已提交
928

929
	dev_dbg(socdev->dev, "resume work completed\n");
930 931 932 933 934 935

	/* 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
936
static int soc_resume(struct device *dev)
937
{
M
Mark Brown 已提交
938
	struct platform_device *pdev = to_platform_device(dev);
939
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
940
	struct snd_soc_card *card = socdev->card;
941
	struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
942

943 944 945 946 947 948 949 950 951 952 953 954 955
	/* 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");
	}
956

F
Frank Mandarino 已提交
957 958 959 960 961 962 963
	return 0;
}
#else
#define soc_suspend	NULL
#define soc_resume	NULL
#endif

964 965 966
static struct snd_soc_dai_ops null_dai_ops = {
};

967
static void snd_soc_instantiate_card(struct snd_soc_card *card)
F
Frank Mandarino 已提交
968
{
969 970 971 972
	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
973
	struct snd_soc_codec *codec;
974 975
	struct snd_soc_platform *platform;
	struct snd_soc_dai *dai;
976
	int i, found, ret, ac97;
977 978 979 980 981 982 983 984 985 986 987 988 989 990 991

	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;
	}
992

993
	ac97 = 0;
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005
	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;
		}
1006 1007 1008

		if (card->dai_link[i].cpu_dai->ac97_control)
			ac97 = 1;
M
Mark Brown 已提交
1009 1010
	}

1011 1012 1013 1014 1015
	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;
	}

1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
	/* 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;
			}
		}

1037 1038 1039 1040 1041
	/* Note that we do not current check for codec components */

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

	/* Found everything, bring it up */
1042 1043
	if (card->probe) {
		ret = card->probe(pdev);
1044
		if (ret < 0)
1045
			return;
F
Frank Mandarino 已提交
1046 1047
	}

1048 1049
	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
1050
		if (cpu_dai->probe) {
1051
			ret = cpu_dai->probe(pdev, cpu_dai);
1052
			if (ret < 0)
F
Frank Mandarino 已提交
1053 1054 1055 1056 1057 1058
				goto cpu_dai_err;
		}
	}

	if (codec_dev->probe) {
		ret = codec_dev->probe(pdev);
1059
		if (ret < 0)
F
Frank Mandarino 已提交
1060 1061
			goto cpu_dai_err;
	}
M
Mark Brown 已提交
1062
	codec = card->codec;
F
Frank Mandarino 已提交
1063 1064 1065

	if (platform->probe) {
		ret = platform->probe(pdev);
1066
		if (ret < 0)
F
Frank Mandarino 已提交
1067 1068 1069 1070
			goto platform_err;
	}

	/* DAPM stream work */
1071
	INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
R
Randy Dunlap 已提交
1072
#ifdef CONFIG_PM
1073
	/* deferred resume work */
1074
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
R
Randy Dunlap 已提交
1075
#endif
1076

M
Mark Brown 已提交
1077 1078 1079 1080 1081 1082 1083 1084 1085
	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;
			}
		}
1086
		if (card->dai_link[i].codec_dai->ac97_control)
M
Mark Brown 已提交
1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
			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");

	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);

1132 1133 1134
	card->instantiated = 1;

	return;
F
Frank Mandarino 已提交
1135

M
Mark Brown 已提交
1136 1137 1138 1139
card_err:
	if (platform->remove)
		platform->remove(pdev);

F
Frank Mandarino 已提交
1140 1141 1142 1143 1144
platform_err:
	if (codec_dev->remove)
		codec_dev->remove(pdev);

cpu_dai_err:
1145
	for (i--; i >= 0; i--) {
1146
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
F
Frank Mandarino 已提交
1147
		if (cpu_dai->remove)
1148
			cpu_dai->remove(pdev, cpu_dai);
F
Frank Mandarino 已提交
1149 1150
	}

1151 1152
	if (card->remove)
		card->remove(pdev);
1153
}
F
Frank Mandarino 已提交
1154

1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
/*
 * 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
1185 1186 1187 1188 1189 1190 1191
}

/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
	int i;
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1192
	struct snd_soc_card *card = socdev->card;
1193
	struct snd_soc_platform *platform = card->platform;
F
Frank Mandarino 已提交
1194 1195
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;

1196 1197 1198
	if (!card->instantiated)
		return 0;

1199
	run_delayed_work(&card->delayed_work);
1200

F
Frank Mandarino 已提交
1201 1202 1203 1204 1205 1206
	if (platform->remove)
		platform->remove(pdev);

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

1207 1208
	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
1209
		if (cpu_dai->remove)
1210
			cpu_dai->remove(pdev, cpu_dai);
F
Frank Mandarino 已提交
1211 1212
	}

1213 1214
	if (card->remove)
		card->remove(pdev);
F
Frank Mandarino 已提交
1215

M
Mark Brown 已提交
1216 1217
	snd_soc_unregister_card(card);

F
Frank Mandarino 已提交
1218 1219 1220
	return 0;
}

M
Mark Brown 已提交
1221
static int soc_poweroff(struct device *dev)
M
Mark Brown 已提交
1222
{
M
Mark Brown 已提交
1223
	struct platform_device *pdev = to_platform_device(dev);
M
Mark Brown 已提交
1224 1225 1226 1227
	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
1228
		return 0;
M
Mark Brown 已提交
1229 1230 1231 1232 1233 1234

	/* 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
1235 1236

	return 0;
M
Mark Brown 已提交
1237 1238
}

M
Mark Brown 已提交
1239 1240 1241 1242 1243 1244
static struct dev_pm_ops soc_pm_ops = {
	.suspend = soc_suspend,
	.resume = soc_resume,
	.poweroff = soc_poweroff,
};

F
Frank Mandarino 已提交
1245 1246 1247 1248
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
1249
		.owner		= THIS_MODULE,
M
Mark Brown 已提交
1250
		.pm		= &soc_pm_ops,
F
Frank Mandarino 已提交
1251 1252 1253 1254 1255 1256 1257 1258 1259
	},
	.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)
{
1260
	struct snd_soc_card *card = socdev->card;
1261
	struct snd_soc_codec *codec = card->codec;
1262
	struct snd_soc_platform *platform = card->platform;
1263 1264
	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
1265 1266 1267 1268 1269 1270 1271 1272
	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;
1273 1274

	rtd->dai = dai_link;
F
Frank Mandarino 已提交
1275
	rtd->socdev = socdev;
1276
	codec_dai->codec = card->codec;
F
Frank Mandarino 已提交
1277 1278

	/* check client and interface hw capabilities */
M
Mark Brown 已提交
1279 1280
	sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
		num);
F
Frank Mandarino 已提交
1281 1282 1283 1284 1285 1286 1287 1288 1289

	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) {
1290 1291
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
			codec->name);
F
Frank Mandarino 已提交
1292 1293 1294 1295
		kfree(rtd);
		return ret;
	}

1296
	dai_link->pcm = pcm;
F
Frank Mandarino 已提交
1297
	pcm->private_data = rtd;
1298 1299 1300 1301 1302 1303 1304
	soc_pcm_ops.mmap = platform->pcm_ops->mmap;
	soc_pcm_ops.pointer = platform->pcm_ops->pointer;
	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
1305 1306 1307 1308 1309 1310 1311

	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);

1312
	ret = platform->pcm_new(codec->card, codec_dai, pcm);
F
Frank Mandarino 已提交
1313 1314 1315 1316 1317 1318
	if (ret < 0) {
		printk(KERN_ERR "asoc: platform pcm constructor failed\n");
		kfree(rtd);
		return ret;
	}

1319
	pcm->private_free = platform->pcm_free;
F
Frank Mandarino 已提交
1320 1321 1322 1323 1324
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
/**
 * 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
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403
/**
 * 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;
	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,
1404
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1405 1406
{
	int change;
1407
	unsigned int old, new;
F
Frank Mandarino 已提交
1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418

	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);

1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442
/**
 * 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.
 */
static int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
				unsigned short reg, unsigned int mask,
				unsigned int value)
{
	int change;

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

	return change;
}

F
Frank Mandarino 已提交
1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455
/**
 * 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,
1456
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1457 1458
{
	int change;
1459
	unsigned int old, new;
F
Frank Mandarino 已提交
1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471

	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
1472 1473
 * @idx: ALSA card index
 * @xid: card identification
F
Frank Mandarino 已提交
1474 1475 1476 1477 1478
 *
 * Create a new sound card based upon the codec and interface pcms.
 *
 * Returns 0 for success, else error.
 */
1479
int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
F
Frank Mandarino 已提交
1480
{
1481
	struct snd_soc_card *card = socdev->card;
1482
	struct snd_soc_codec *codec = card->codec;
1483
	int ret, i;
F
Frank Mandarino 已提交
1484 1485 1486 1487

	mutex_lock(&codec->mutex);

	/* register a sound card */
1488 1489
	ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
	if (ret < 0) {
F
Frank Mandarino 已提交
1490 1491 1492
		printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
			codec->name);
		mutex_unlock(&codec->mutex);
1493
		return ret;
F
Frank Mandarino 已提交
1494 1495
	}

1496
	codec->socdev = socdev;
F
Frank Mandarino 已提交
1497 1498 1499 1500 1501
	codec->card->dev = socdev->dev;
	codec->card->private_data = codec;
	strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));

	/* create the pcms */
1502 1503
	for (i = 0; i < card->num_links; i++) {
		ret = soc_new_pcm(socdev, &card->dai_link[i], i);
F
Frank Mandarino 已提交
1504 1505
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't create pcm %s\n",
1506
				card->dai_link[i].stream_name);
F
Frank Mandarino 已提交
1507 1508 1509
			mutex_unlock(&codec->mutex);
			return ret;
		}
1510 1511 1512 1513
		if (card->dai_link[i].codec_dai->ac97_control) {
			snd_ac97_dev_add_pdata(codec->ac97,
				card->dai_link[i].cpu_dai->ac97_pdata);
		}
F
Frank Mandarino 已提交
1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529
	}

	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)
{
1530
	struct snd_soc_codec *codec = socdev->card->codec;
1531
#ifdef CONFIG_SND_SOC_AC97_BUS
1532
	struct snd_soc_dai *codec_dai;
1533 1534
	int i;
#endif
F
Frank Mandarino 已提交
1535 1536

	mutex_lock(&codec->mutex);
1537
	soc_cleanup_codec_debugfs(codec);
F
Frank Mandarino 已提交
1538
#ifdef CONFIG_SND_SOC_AC97_BUS
1539
	for (i = 0; i < codec->num_dai; i++) {
1540
		codec_dai = &codec->dai[i];
1541 1542
		if (codec_dai->ac97_control && codec->ac97 &&
		    strcmp(codec->name, "AC97") != 0) {
1543 1544 1545 1546 1547
			soc_ac97_dev_unregister(codec);
			goto free_card;
		}
	}
free_card:
F
Frank Mandarino 已提交
1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 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
#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
1584
 * @long_name: control long name
F
Frank Mandarino 已提交
1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
 *
 * 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
1604 1605 1606 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
/**
 * 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
1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651
/**
 * 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;
1652
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1653

1654 1655
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1656 1657 1658 1659 1660 1661 1662 1663 1664
	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
1665
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
 *
 * 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;
1676
	unsigned int val, bitmask;
F
Frank Mandarino 已提交
1677

1678
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1679 1680
		;
	val = snd_soc_read(codec, e->reg);
1681 1682
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
F
Frank Mandarino 已提交
1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693
	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
1694
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1695 1696 1697 1698 1699 1700 1701 1702 1703 1704
 *
 * 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;
1705 1706
	unsigned int val;
	unsigned int mask, bitmask;
F
Frank Mandarino 已提交
1707

1708
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1709
		;
1710
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
1711 1712 1713 1714
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
1715
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
Frank Mandarino 已提交
1716 1717 1718 1719 1720
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

1721
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
F
Frank Mandarino 已提交
1722 1723 1724
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740
/**
 * 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);
1741
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1742
	unsigned int reg_val, val, mux;
P
Peter Ujfalusi 已提交
1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779

	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);
1780
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1781 1782
	unsigned int val;
	unsigned int mask;
P
Peter Ujfalusi 已提交
1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794

	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;
	}

1795
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
P
Peter Ujfalusi 已提交
1796 1797 1798
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

F
Frank Mandarino 已提交
1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815
/**
 * 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;
1816
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1817

1818 1819
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837
	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
1838 1839
	int max = kcontrol->private_value;

1840
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
1841 1842 1843
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
1844 1845 1846

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1847
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863
	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)
{
1864 1865 1866
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
1867
	unsigned int shift = mc->shift;
1868
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
1869

1870
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
1871 1872 1873 1874
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
Frank Mandarino 已提交
1875 1876
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1877
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1878 1879 1880 1881 1882 1883 1884
	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
1885
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1886 1887 1888 1889 1890 1891 1892 1893
 *
 * 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)
{
1894 1895
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
1896
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1897 1898 1899
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
1900
	int max = mc->max;
1901 1902
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
1903 1904 1905 1906 1907 1908 1909 1910

	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
1911
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
1912 1913
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
1914
				max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
1915 1916 1917 1918 1919 1920 1921 1922 1923
	}

	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
1924
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1925 1926 1927 1928 1929 1930 1931 1932
 *
 * 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)
{
1933 1934
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
1935
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1936 1937 1938
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
1939
	int max = mc->max;
1940 1941
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
1942
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
1943 1944 1945

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
1946
		val = max - val;
F
Frank Mandarino 已提交
1947 1948 1949 1950 1951
	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
1952
			val2 = max - val2;
F
Frank Mandarino 已提交
1953 1954 1955
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
1956
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
F
Frank Mandarino 已提交
1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
}
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)
{
1973 1974 1975
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
P
Philipp Zabel 已提交
1976

1977
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
1978 1979 1980
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
1981 1982 1983

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1984
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1985 1986 1987 1988 1989 1990 1991
	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
1992
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1993 1994 1995 1996 1997 1998 1999 2000
 *
 * 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)
{
2001 2002
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2003
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2004 2005 2006
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2007
	int max = mc->max;
2008
	unsigned int mask = (1 << fls(max)) - 1;
2009
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2010 2011 2012 2013 2014 2015 2016

	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
2017
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2018
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2019
			max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2020 2021 2022 2023 2024 2025 2026 2027 2028
	}

	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
2029
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2030 2031 2032 2033 2034 2035 2036 2037
 *
 * 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)
{
2038 2039
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2040
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2041 2042 2043
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2044
	int max = mc->max;
2045 2046
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2047
	int err;
2048
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2049 2050 2051 2052 2053 2054

	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
2055 2056
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
2057 2058 2059 2060 2061
	}

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

2062
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2063
	if (err < 0)
F
Frank Mandarino 已提交
2064 2065
		return err;

2066
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
F
Frank Mandarino 已提交
2067 2068 2069 2070
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082
/**
 * 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)
{
2083 2084 2085 2086
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;
2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098

	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
2099
 * @ucontrol: control element information
2100 2101 2102 2103 2104 2105 2106 2107
 *
 * 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)
{
2108 2109
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2110
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2111
	unsigned int reg = mc->reg;
2112
	int min = mc->min;
2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125
	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
2126
 * @ucontrol: control element information
2127 2128 2129 2130 2131 2132 2133 2134
 *
 * 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)
{
2135 2136
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2137
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2138
	unsigned int reg = mc->reg;
2139
	int min = mc->min;
2140
	unsigned int val;
2141 2142 2143 2144

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

2145
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2146 2147 2148
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160
/**
 * 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)
{
2161
	if (dai->ops && dai->ops->set_sysclk)
2162
		return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2163 2164 2165 2166 2167 2168 2169 2170
	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
2171
 * @div_id: DAI specific clock divider ID
2172 2173 2174 2175 2176 2177 2178 2179 2180
 * @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)
{
2181
	if (dai->ops && dai->ops->set_clkdiv)
2182
		return dai->ops->set_clkdiv(dai, div_id, div);
2183 2184 2185 2186 2187 2188 2189 2190 2191
	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
2192
 * @source: DAI specific source for the PLL
2193 2194 2195 2196 2197
 * @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.
 */
2198 2199
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
2200
{
2201
	if (dai->ops && dai->ops->set_pll)
2202 2203
		return dai->ops->set_pll(dai, pll_id, source,
					 freq_in, freq_out);
2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217
	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)
{
2218
	if (dai->ops && dai->ops->set_fmt)
2219
		return dai->ops->set_fmt(dai, fmt);
2220 2221 2222 2223 2224 2225 2226 2227
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
2228 2229
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
2230
 * @slots: Number of slots in use.
2231
 * @slot_width: Width in bits for each slot.
2232 2233 2234 2235 2236
 *
 * 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,
2237
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2238
{
2239
	if (dai->ops && dai->ops->set_tdm_slot)
2240 2241
		return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
				slots, slot_width);
2242 2243 2244 2245 2246
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270
/**
 * 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);

2271 2272 2273 2274 2275 2276 2277 2278 2279
/**
 * 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)
{
2280
	if (dai->ops && dai->ops->set_tristate)
2281
		return dai->ops->set_tristate(dai, tristate);
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295
	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)
{
2296
	if (dai->ops && dai->ops->digital_mute)
2297
		return dai->ops->digital_mute(dai, mute);
2298 2299 2300 2301 2302
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
2303 2304 2305
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2306
 * @card: Card to register
M
Mark Brown 已提交
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321
 *
 * 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);
2322
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2323 2324 2325 2326 2327 2328 2329 2330 2331 2332
	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
2333
 * @card: Card to unregister
M
Mark Brown 已提交
2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349
 *
 * 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
2350 2351 2352
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
2353
 * @dai: DAI to register
M
Mark Brown 已提交
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363
 */
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);

2364 2365 2366
	if (!dai->ops)
		dai->ops = &null_dai_ops;

M
Mark Brown 已提交
2367 2368 2369 2370
	INIT_LIST_HEAD(&dai->list);

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
2371
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382
	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
2383
 * @dai: DAI to unregister
M
Mark Brown 已提交
2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397
 */
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
2398 2399
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423
 */
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
2424 2425
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
2426 2427 2428 2429 2430 2431 2432 2433 2434 2435
 */
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
2436 2437 2438
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
2439
 * @platform: platform to register
M
Mark Brown 已提交
2440 2441 2442 2443 2444 2445 2446 2447 2448 2449
 */
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);
2450
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461
	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
2462
 * @platform: platform to unregister
M
Mark Brown 已提交
2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473
 */
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);

2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506
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
2507 2508 2509
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
2510
 * @codec: codec to register
M
Mark Brown 已提交
2511 2512 2513
 */
int snd_soc_register_codec(struct snd_soc_codec *codec)
{
2514 2515
	int i;

M
Mark Brown 已提交
2516 2517 2518 2519 2520 2521 2522 2523 2524
	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);

2525 2526 2527 2528 2529
	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
2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543
	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
2544
 * @codec: codec to unregister
M
Mark Brown 已提交
2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555
 */
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);

2556
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
2557
{
2558 2559 2560 2561 2562 2563 2564 2565 2566
#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
2567 2568 2569
	return platform_driver_register(&soc_driver);
}

M
Mark Brown 已提交
2570
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
2571
{
2572 2573 2574
#ifdef CONFIG_DEBUG_FS
	debugfs_remove_recursive(debugfs_root);
#endif
2575
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
2576 2577 2578 2579 2580 2581
}

module_init(snd_soc_init);
module_exit(snd_soc_exit);

/* Module information */
2582
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
2583 2584
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
2585
MODULE_ALIAS("platform:soc-audio");