soc-core.c 87.4 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
 * Copyright 2005 Openedhand Ltd.
6 7
 * Copyright (C) 2010 Slimlogic Ltd.
 * Copyright (C) 2010 Texas Instruments Inc.
8
 *
9
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 11
 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
F
Frank Mandarino 已提交
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  TODO:
 *   o Add hw rules to enforce rates, etc.
 *   o More testing with other codecs/machines.
 *   o Add more codecs and platforms to ensure good API coverage.
 *   o Support TDM on PCM and I2S
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
31
#include <linux/debugfs.h>
F
Frank Mandarino 已提交
32
#include <linux/platform_device.h>
33
#include <linux/slab.h>
34
#include <sound/ac97_codec.h>
F
Frank Mandarino 已提交
35 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>

42 43
#define NAME_SIZE	32

F
Frank Mandarino 已提交
44 45 46
static DEFINE_MUTEX(pcm_mutex);
static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);

47 48 49 50
#ifdef CONFIG_DEBUG_FS
static struct dentry *debugfs_root;
#endif

M
Mark Brown 已提交
51 52
static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(card_list);
M
Mark Brown 已提交
53
static LIST_HEAD(dai_list);
M
Mark Brown 已提交
54
static LIST_HEAD(platform_list);
M
Mark Brown 已提交
55
static LIST_HEAD(codec_list);
M
Mark Brown 已提交
56 57 58

static int snd_soc_register_card(struct snd_soc_card *card);
static int snd_soc_unregister_card(struct snd_soc_card *card);
59
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
M
Mark Brown 已提交
60

F
Frank Mandarino 已提交
61 62 63 64 65 66 67 68 69
/*
 * 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)");

70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
/*
 * 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;
}

89 90 91
/* codec register dump */
static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
{
92
	int ret, i, step = 1, count = 0;
93

94
	if (!codec->driver->reg_cache_size)
95 96
		return 0;

97 98
	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
99 100

	count += sprintf(buf, "%s registers\n", codec->name);
101 102
	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
		if (codec->driver->readable_register && !codec->driver->readable_register(i))
103 104 105 106 107 108
			continue;

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

109 110
		if (codec->driver->display_register) {
			count += codec->driver->display_register(codec, buf + count,
111
							 PAGE_SIZE - count, i);
112 113 114 115 116
		} else {
			/* If the read fails it's almost certainly due to
			 * the register being volatile and the device being
			 * powered off.
			 */
117
			ret = codec->driver->read(codec, i);
118 119 120 121 122 123 124 125 126
			if (ret >= 0)
				count += snprintf(buf + count,
						  PAGE_SIZE - count,
						  "%4x", ret);
			else
				count += snprintf(buf + count,
						  PAGE_SIZE - count,
						  "<no data: %d>", ret);
		}
127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144

		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)
{
145 146 147 148
	struct snd_soc_pcm_runtime *rtd =
			container_of(dev, struct snd_soc_pcm_runtime, dev);

	return soc_codec_reg_show(rtd->codec, buf);
149 150 151 152
}

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

153 154 155
static ssize_t pmdown_time_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
156 157
	struct snd_soc_pcm_runtime *rtd =
			container_of(dev, struct snd_soc_pcm_runtime, dev);
158

159
	return sprintf(buf, "%ld\n", rtd->pmdown_time);
160 161 162 163 164 165
}

static ssize_t pmdown_time_set(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
166 167
	struct snd_soc_pcm_runtime *rtd =
			container_of(dev, struct snd_soc_pcm_runtime, dev);
168
	int ret;
169

170 171 172
	ret = strict_strtol(buf, 10, &rtd->pmdown_time);
	if (ret)
		return ret;
173 174 175 176 177 178

	return count;
}

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

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
#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;

216 217
	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
218 219 220 221

	while (*start == ' ')
		start++;
	reg = simple_strtoul(start, &start, 16);
222
	if ((reg >= codec->driver->reg_cache_size) || (reg % step))
223 224 225 226 227
		return -EINVAL;
	while (*start == ' ')
		start++;
	if (strict_strtoul(start, 16, &value))
		return -EINVAL;
228
	codec->driver->write(codec, reg, value);
229 230 231 232 233 234 235
	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,
236
	.llseek = default_llseek,
237 238 239 240
};

static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
241
	codec->debugfs_codec_root = debugfs_create_dir(codec->name ,
242 243 244 245 246 247 248 249 250 251 252 253 254 255
						       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");

256
	codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276
						     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);
}

277 278 279 280
static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
				    size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
281
	ssize_t len, ret = 0;
282 283 284 285 286
	struct snd_soc_codec *codec;

	if (!buf)
		return -ENOMEM;

287 288 289 290 291 292 293 294 295 296
	list_for_each_entry(codec, &codec_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
			       codec->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
297 298 299 300 301 302 303 304 305 306 307 308 309 310

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

	kfree(buf);

	return ret;
}

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

M
Mark Brown 已提交
311 312 313 314
static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
				  size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
315
	ssize_t len, ret = 0;
M
Mark Brown 已提交
316 317 318 319 320
	struct snd_soc_dai *dai;

	if (!buf)
		return -ENOMEM;

321 322 323 324 325 326 327 328 329
	list_for_each_entry(dai, &dai_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
M
Mark Brown 已提交
330

331
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
M
Mark Brown 已提交
332 333 334 335 336 337 338 339 340 341 342

	kfree(buf);

	return ret;
}

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

343 344 345 346 347
static ssize_t platform_list_read_file(struct file *file,
				       char __user *user_buf,
				       size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
348
	ssize_t len, ret = 0;
349 350 351 352 353
	struct snd_soc_platform *platform;

	if (!buf)
		return -ENOMEM;

354 355 356 357 358 359 360 361 362 363
	list_for_each_entry(platform, &platform_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
			       platform->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
364

365
	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
366 367 368 369 370 371 372 373 374 375 376

	kfree(buf);

	return ret;
}

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

377 378 379 380 381 382 383 384 385 386 387
#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
388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405
#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;
406
	codec->ac97->dev.parent = codec->card->dev;
F
Frank Mandarino 已提交
407 408
	codec->ac97->dev.release = soc_ac97_device_release;

409
	dev_set_name(&codec->ac97->dev, "%d-%d:%s",
410
		     codec->card->snd_card->number, 0, codec->name);
F
Frank Mandarino 已提交
411 412 413 414 415 416 417 418 419 420
	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

421 422 423
static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
424 425
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
426 427
	int ret;

428 429 430 431
	if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
			rtd->dai_link->symmetric_rates) {
		dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
				rtd->rate);
432 433 434

		ret = snd_pcm_hw_constraint_minmax(substream->runtime,
						   SNDRV_PCM_HW_PARAM_RATE,
435 436
						   rtd->rate,
						   rtd->rate);
437
		if (ret < 0) {
438
			dev_err(&rtd->dev,
439 440 441 442 443 444 445 446
				"Unable to apply rate symmetry constraint: %d\n", ret);
			return ret;
		}
	}

	return 0;
}

F
Frank Mandarino 已提交
447 448 449 450 451 452 453 454 455
/*
 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 * then initialized and any private data can be allocated. This also calls
 * startup for the cpu DAI, platform, machine and codec DAI.
 */
static int soc_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
456 457 458 459 460
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
	struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
F
Frank Mandarino 已提交
461 462 463 464 465
	int ret = 0;

	mutex_lock(&pcm_mutex);

	/* startup the audio subsystem */
466 467
	if (cpu_dai->driver->ops->startup) {
		ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
F
Frank Mandarino 已提交
468 469
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open interface %s\n",
470
				cpu_dai->name);
F
Frank Mandarino 已提交
471 472 473 474
			goto out;
		}
	}

475 476
	if (platform->driver->ops->open) {
		ret = platform->driver->ops->open(substream);
F
Frank Mandarino 已提交
477 478 479 480 481 482
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
			goto platform_err;
		}
	}

483 484
	if (codec_dai->driver->ops->startup) {
		ret = codec_dai->driver->ops->startup(substream, codec_dai);
F
Frank Mandarino 已提交
485
		if (ret < 0) {
486 487 488
			printk(KERN_ERR "asoc: can't open codec %s\n",
				codec_dai->name);
			goto codec_dai_err;
F
Frank Mandarino 已提交
489 490 491
		}
	}

492 493
	if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
		ret = rtd->dai_link->ops->startup(substream);
F
Frank Mandarino 已提交
494
		if (ret < 0) {
495
			printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
496
			goto machine_err;
F
Frank Mandarino 已提交
497 498 499 500 501 502
		}
	}

	/* Check that the codec and cpu DAI's are compatible */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
503 504
			max(codec_dai_drv->playback.rate_min,
			    cpu_dai_drv->playback.rate_min);
F
Frank Mandarino 已提交
505
		runtime->hw.rate_max =
506 507
			min(codec_dai_drv->playback.rate_max,
			    cpu_dai_drv->playback.rate_max);
F
Frank Mandarino 已提交
508
		runtime->hw.channels_min =
509 510
			max(codec_dai_drv->playback.channels_min,
				cpu_dai_drv->playback.channels_min);
F
Frank Mandarino 已提交
511
		runtime->hw.channels_max =
512 513
			min(codec_dai_drv->playback.channels_max,
				cpu_dai_drv->playback.channels_max);
514
		runtime->hw.formats =
515
			codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
516
		runtime->hw.rates =
517 518
			codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
		if (codec_dai_drv->playback.rates
519
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
520 521
			runtime->hw.rates |= cpu_dai_drv->playback.rates;
		if (cpu_dai_drv->playback.rates
522
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
523
			runtime->hw.rates |= codec_dai_drv->playback.rates;
F
Frank Mandarino 已提交
524 525
	} else {
		runtime->hw.rate_min =
526 527
			max(codec_dai_drv->capture.rate_min,
			    cpu_dai_drv->capture.rate_min);
F
Frank Mandarino 已提交
528
		runtime->hw.rate_max =
529 530
			min(codec_dai_drv->capture.rate_max,
			    cpu_dai_drv->capture.rate_max);
F
Frank Mandarino 已提交
531
		runtime->hw.channels_min =
532 533
			max(codec_dai_drv->capture.channels_min,
				cpu_dai_drv->capture.channels_min);
F
Frank Mandarino 已提交
534
		runtime->hw.channels_max =
535 536
			min(codec_dai_drv->capture.channels_max,
				cpu_dai_drv->capture.channels_max);
537
		runtime->hw.formats =
538
			codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
539
		runtime->hw.rates =
540 541
			codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
		if (codec_dai_drv->capture.rates
542
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
543 544
			runtime->hw.rates |= cpu_dai_drv->capture.rates;
		if (cpu_dai_drv->capture.rates
545
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
546
			runtime->hw.rates |= codec_dai_drv->capture.rates;
F
Frank Mandarino 已提交
547 548 549 550 551
	}

	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
552
			codec_dai->name, cpu_dai->name);
553
		goto config_err;
F
Frank Mandarino 已提交
554 555 556
	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
557
			codec_dai->name, cpu_dai->name);
558
		goto config_err;
F
Frank Mandarino 已提交
559 560 561
	}
	if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
562
				codec_dai->name, cpu_dai->name);
563
		goto config_err;
F
Frank Mandarino 已提交
564 565
	}

566 567 568 569
	/* 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)
570
			goto config_err;
571 572
	}

573 574
	pr_debug("asoc: %s <-> %s info:\n",
			codec_dai->name, cpu_dai->name);
575 576 577 578 579
	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
580

581
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
582 583
		cpu_dai->playback_active++;
		codec_dai->playback_active++;
584
	} else {
585 586
		cpu_dai->capture_active++;
		codec_dai->capture_active++;
587 588 589
	}
	cpu_dai->active++;
	codec_dai->active++;
590
	rtd->codec->active++;
F
Frank Mandarino 已提交
591 592 593
	mutex_unlock(&pcm_mutex);
	return 0;

594
config_err:
595 596
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
597

598
machine_err:
599 600
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
601

602
codec_dai_err:
603 604
	if (platform->driver->ops->close)
		platform->driver->ops->close(substream);
F
Frank Mandarino 已提交
605 606

platform_err:
607 608
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
609 610 611 612 613 614
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
615
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
616 617 618
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
619
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
620
{
621 622 623
	struct snd_soc_pcm_runtime *rtd =
			container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
624 625

	mutex_lock(&pcm_mutex);
626 627 628 629 630 631 632 633 634 635 636 637

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

	/* are we waiting on this codec DAI stream */
	if (codec_dai->pop_wait == 1) {
		codec_dai->pop_wait = 0;
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->playback.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
638
	}
639

F
Frank Mandarino 已提交
640 641 642 643 644 645 646 647 648 649 650
	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;
651 652 653 654
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
655 656 657

	mutex_lock(&pcm_mutex);

658
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
659 660
		cpu_dai->playback_active--;
		codec_dai->playback_active--;
661
	} else {
662 663
		cpu_dai->capture_active--;
		codec_dai->capture_active--;
F
Frank Mandarino 已提交
664
	}
665 666 667

	cpu_dai->active--;
	codec_dai->active--;
F
Frank Mandarino 已提交
668 669
	codec->active--;

670 671 672 673 674 675
	/* 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);

676 677
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
678

679 680
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
681

682 683
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
684

685 686 687
	if (platform->driver->ops->close)
		platform->driver->ops->close(substream);
	cpu_dai->runtime = NULL;
F
Frank Mandarino 已提交
688 689 690

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
691
		codec_dai->pop_wait = 1;
692 693
		schedule_delayed_work(&rtd->delayed_work,
			msecs_to_jiffies(rtd->pmdown_time));
F
Frank Mandarino 已提交
694 695
	} else {
		/* capture streams can be powered down now */
696 697
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->capture.stream_name,
698
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
699 700 701 702 703 704 705 706 707 708 709 710 711 712
	}

	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;
713 714 715
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
716 717 718
	int ret = 0;

	mutex_lock(&pcm_mutex);
719

720 721
	if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
		ret = rtd->dai_link->ops->prepare(substream);
722 723 724 725 726 727
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine prepare error\n");
			goto out;
		}
	}

728 729
	if (platform->driver->ops->prepare) {
		ret = platform->driver->ops->prepare(substream);
730 731
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
732
			goto out;
733
		}
F
Frank Mandarino 已提交
734 735
	}

736 737
	if (codec_dai->driver->ops->prepare) {
		ret = codec_dai->driver->ops->prepare(substream, codec_dai);
738 739
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
740
			goto out;
741
		}
F
Frank Mandarino 已提交
742 743
	}

744 745
	if (cpu_dai->driver->ops->prepare) {
		ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
746 747 748 749 750
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
751

752 753 754 755
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
756
		cancel_delayed_work(&rtd->delayed_work);
757
	}
F
Frank Mandarino 已提交
758

759
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
760 761
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->playback.stream_name,
762 763
					  SND_SOC_DAPM_STREAM_START);
	else
764 765
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->capture.stream_name,
766
					  SND_SOC_DAPM_STREAM_START);
767

768
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
769 770 771 772 773 774 775 776 777 778 779 780 781 782 783

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;
784 785 786
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
787 788 789 790
	int ret = 0;

	mutex_lock(&pcm_mutex);

791 792
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
		ret = rtd->dai_link->ops->hw_params(substream, params);
793 794
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
Frank Mandarino 已提交
795
			goto out;
796
		}
F
Frank Mandarino 已提交
797 798
	}

799 800
	if (codec_dai->driver->ops->hw_params) {
		ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
801 802
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
803 804
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
805 806 807
		}
	}

808 809
	if (cpu_dai->driver->ops->hw_params) {
		ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
810
		if (ret < 0) {
811
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
812
				cpu_dai->name);
F
Frank Mandarino 已提交
813 814 815 816
			goto interface_err;
		}
	}

817 818
	if (platform->driver->ops->hw_params) {
		ret = platform->driver->ops->hw_params(substream, params);
F
Frank Mandarino 已提交
819
		if (ret < 0) {
820
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
821 822 823 824 825
				platform->name);
			goto platform_err;
		}
	}

826
	rtd->rate = params_rate(params);
827

F
Frank Mandarino 已提交
828 829 830 831 832
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
833 834
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
835 836

interface_err:
837 838
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
839 840

codec_err:
841 842
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
843 844 845 846 847 848 849 850 851 852 853

	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;
854 855 856 857
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
858 859 860 861

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
862 863
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
864 865

	/* free any machine hw params */
866 867
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
868 869

	/* free any DMA resources */
870 871
	if (platform->driver->ops->hw_free)
		platform->driver->ops->hw_free(substream);
F
Frank Mandarino 已提交
872 873

	/* now free hw params for the DAI's  */
874 875
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
876

877 878
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
879 880 881 882 883 884 885 886

	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;
887 888 889
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
890 891
	int ret;

892 893
	if (codec_dai->driver->ops->trigger) {
		ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
894 895 896 897
		if (ret < 0)
			return ret;
	}

898 899
	if (platform->driver->ops->trigger) {
		ret = platform->driver->ops->trigger(substream, cmd);
F
Frank Mandarino 已提交
900 901 902 903
		if (ret < 0)
			return ret;
	}

904 905
	if (cpu_dai->driver->ops->trigger) {
		ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
906 907 908 909 910 911
		if (ret < 0)
			return ret;
	}
	return 0;
}

912 913
/*
 * soc level wrapper for pointer callback
914 915
 * If cpu_dai, codec_dai, platform driver has the delay callback, than
 * the runtime->delay will be updated accordingly.
916 917 918 919
 */
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
920 921 922
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
923
	struct snd_pcm_runtime *runtime = substream->runtime;
924
	snd_pcm_uframes_t offset = 0;
925
	snd_pcm_sframes_t delay = 0;
926

927 928
	if (platform->driver->ops->pointer)
		offset = platform->driver->ops->pointer(substream);
929

930 931
	if (cpu_dai->driver->ops->delay)
		delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
932

933 934
	if (codec_dai->driver->ops->delay)
		delay += codec_dai->driver->ops->delay(substream, codec_dai);
935

936 937
	if (platform->driver->delay)
		delay += platform->driver->delay(substream, codec_dai);
938 939 940

	runtime->delay = delay;

941 942 943
	return offset;
}

F
Frank Mandarino 已提交
944 945 946 947 948 949 950 951
/* 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,
952
	.pointer	= soc_pcm_pointer,
F
Frank Mandarino 已提交
953 954 955 956
};

#ifdef CONFIG_PM
/* powers down audio subsystem for suspend */
M
Mark Brown 已提交
957
static int soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
958
{
M
Mark Brown 已提交
959
	struct platform_device *pdev = to_platform_device(dev);
960
	struct snd_soc_card *card = platform_get_drvdata(pdev);
F
Frank Mandarino 已提交
961 962
	int i;

963 964 965
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
966
	if (list_empty(&card->codec_dev_list))
967 968
		return 0;

969 970 971
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
972 973 974
	snd_power_lock(card->snd_card);
	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(card->snd_card);
975 976

	/* we're going to block userspace touching us until resume completes */
977
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
978

F
Frank Mandarino 已提交
979
	/* mute any active DAC's */
980 981 982
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *dai = card->rtd[i].codec_dai;
		struct snd_soc_dai_driver *drv = dai->driver;
983

984
		if (card->rtd[i].dai_link->ignore_suspend)
985 986
			continue;

987 988
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
989 990
	}

991
	/* suspend all pcms */
992 993
	for (i = 0; i < card->num_rtd; i++) {
		if (card->rtd[i].dai_link->ignore_suspend)
994 995
			continue;

996
		snd_pcm_suspend_all(card->rtd[i].pcm);
997
	}
998

999
	if (card->suspend_pre)
M
Mark Brown 已提交
1000
		card->suspend_pre(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
1001

1002 1003 1004
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_platform *platform = card->rtd[i].platform;
1005

1006
		if (card->rtd[i].dai_link->ignore_suspend)
1007 1008
			continue;

1009 1010 1011 1012 1013 1014
		if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
		if (platform->driver->suspend && !platform->suspended) {
			platform->driver->suspend(cpu_dai);
			platform->suspended = 1;
		}
F
Frank Mandarino 已提交
1015 1016 1017
	}

	/* close any waiting streams and save state */
1018 1019 1020 1021
	for (i = 0; i < card->num_rtd; i++) {
		run_delayed_work(&card->rtd[i].delayed_work);
		card->rtd[i].codec->suspend_bias_level = card->rtd[i].codec->bias_level;
	}
F
Frank Mandarino 已提交
1022

1023 1024
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1025

1026
		if (card->rtd[i].dai_link->ignore_suspend)
1027 1028
			continue;

1029 1030
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1031
				SND_SOC_DAPM_STREAM_SUSPEND);
1032 1033 1034

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1035 1036 1037
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053
	/* suspend all CODECs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_codec *codec = card->rtd[i].codec;
		/* If there are paths active then the CODEC will be held with
		 * bias _ON and should not be suspended. */
		if (!codec->suspended && codec->driver->suspend) {
			switch (codec->bias_level) {
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->suspend(codec, PMSG_SUSPEND);
				codec->suspended = 1;
				break;
			default:
				dev_dbg(codec->dev, "CODEC is on over suspend\n");
				break;
			}
1054 1055
		}
	}
F
Frank Mandarino 已提交
1056

1057 1058
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1059

1060
		if (card->rtd[i].dai_link->ignore_suspend)
1061 1062
			continue;

1063 1064
		if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
F
Frank Mandarino 已提交
1065 1066
	}

1067
	if (card->suspend_post)
M
Mark Brown 已提交
1068
		card->suspend_post(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
1069 1070 1071 1072

	return 0;
}

1073 1074 1075 1076
/* 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
1077
{
1078 1079 1080
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
	struct platform_device *pdev = to_platform_device(card->dev);
F
Frank Mandarino 已提交
1081 1082
	int i;

1083 1084 1085 1086
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

1087
	dev_dbg(card->dev, "starting resume work\n");
1088

1089
	/* Bring us up into D2 so that DAPM starts enabling things */
1090
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1091

1092 1093
	if (card->resume_pre)
		card->resume_pre(pdev);
F
Frank Mandarino 已提交
1094

1095 1096 1097
	/* resume AC97 DAIs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1098

1099
		if (card->rtd[i].dai_link->ignore_suspend)
1100 1101
			continue;

1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
		if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
	}

	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_codec *codec = card->rtd[i].codec;
		/* If the CODEC was idle over suspend then it will have been
		 * left with bias OFF or STANDBY and suspended so we must now
		 * resume.  Otherwise the suspend was suppressed.
		 */
		if (codec->driver->resume && codec->suspended) {
			switch (codec->bias_level) {
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->resume(codec);
				codec->suspended = 0;
				break;
			default:
				dev_dbg(codec->dev, "CODEC was on over suspend\n");
				break;
			}
1123 1124
		}
	}
F
Frank Mandarino 已提交
1125

1126 1127
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1128

1129
		if (card->rtd[i].dai_link->ignore_suspend)
1130 1131
			continue;

1132 1133
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1134
				SND_SOC_DAPM_STREAM_RESUME);
1135 1136 1137

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1138 1139 1140
				SND_SOC_DAPM_STREAM_RESUME);
	}

1141
	/* unmute any active DACs */
1142 1143 1144
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *dai = card->rtd[i].codec_dai;
		struct snd_soc_dai_driver *drv = dai->driver;
1145

1146
		if (card->rtd[i].dai_link->ignore_suspend)
1147 1148
			continue;

1149 1150
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
1151 1152
	}

1153 1154 1155
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_platform *platform = card->rtd[i].platform;
1156

1157
		if (card->rtd[i].dai_link->ignore_suspend)
1158 1159
			continue;

1160 1161 1162 1163 1164 1165
		if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
		if (platform->driver->resume && platform->suspended) {
			platform->driver->resume(cpu_dai);
			platform->suspended = 0;
		}
F
Frank Mandarino 已提交
1166 1167
	}

1168 1169
	if (card->resume_post)
		card->resume_post(pdev);
F
Frank Mandarino 已提交
1170

1171
	dev_dbg(card->dev, "resume work completed\n");
1172 1173

	/* userspace can access us now we are back as we were before */
1174
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1175 1176 1177
}

/* powers up audio subsystem after a suspend */
M
Mark Brown 已提交
1178
static int soc_resume(struct device *dev)
1179
{
M
Mark Brown 已提交
1180
	struct platform_device *pdev = to_platform_device(dev);
1181 1182
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	int i;
1183

1184 1185 1186 1187 1188
	/* 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.
	 */
1189 1190 1191 1192 1193 1194 1195 1196 1197 1198
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		if (cpu_dai->driver->ac97_control) {
			dev_dbg(dev, "Resuming AC97 immediately\n");
			soc_resume_deferred(&card->deferred_resume_work);
		} else {
			dev_dbg(dev, "Scheduling resume work\n");
			if (!schedule_work(&card->deferred_resume_work))
				dev_err(dev, "resume work item may be lost\n");
		}
1199
	}
1200

F
Frank Mandarino 已提交
1201 1202 1203 1204 1205 1206 1207
	return 0;
}
#else
#define soc_suspend	NULL
#define soc_resume	NULL
#endif

1208 1209 1210
static struct snd_soc_dai_ops null_dai_ops = {
};

1211
static int soc_bind_dai_link(struct snd_soc_card *card, int num)
F
Frank Mandarino 已提交
1212
{
1213 1214
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
M
Mark Brown 已提交
1215
	struct snd_soc_codec *codec;
1216
	struct snd_soc_platform *platform;
1217
	struct snd_soc_dai *codec_dai, *cpu_dai;
1218

1219 1220 1221
	if (rtd->complete)
		return 1;
	dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1222

1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235
	/* do we already have the CPU DAI for this link ? */
	if (rtd->cpu_dai) {
		goto find_codec;
	}
	/* no, then find CPU DAI from registered DAIs*/
	list_for_each_entry(cpu_dai, &dai_list, list) {
		if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {

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

			rtd->cpu_dai = cpu_dai;
			goto find_codec;
1236 1237
		}
	}
1238 1239
	dev_dbg(card->dev, "CPU DAI %s not registered\n",
			dai_link->cpu_dai_name);
1240

1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
find_codec:
	/* do we already have the CODEC for this link ? */
	if (rtd->codec) {
		goto find_platform;
	}

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

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

			/* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
			list_for_each_entry(codec_dai, &dai_list, list) {
				if (codec->dev == codec_dai->dev &&
						!strcmp(codec_dai->name, dai_link->codec_dai_name)) {
					rtd->codec_dai = codec_dai;
					goto find_platform;
				}
1262
			}
1263 1264 1265 1266
			dev_dbg(card->dev, "CODEC DAI %s not registered\n",
					dai_link->codec_dai_name);

			goto find_platform;
1267
		}
1268 1269 1270
	}
	dev_dbg(card->dev, "CODEC %s not registered\n",
			dai_link->codec_name);
1271

1272 1273 1274 1275
find_platform:
	/* do we already have the CODEC DAI for this link ? */
	if (rtd->platform) {
		goto out;
M
Mark Brown 已提交
1276
	}
1277 1278 1279
	/* no, then find CPU DAI from registered DAIs*/
	list_for_each_entry(platform, &platform_list, list) {
		if (!strcmp(platform->name, dai_link->platform_name)) {
M
Mark Brown 已提交
1280

1281 1282 1283 1284 1285 1286
			if (!try_module_get(platform->dev->driver->owner))
				return -ENODEV;

			rtd->platform = platform;
			goto out;
		}
1287 1288
	}

1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
	dev_dbg(card->dev, "platform %s not registered\n",
			dai_link->platform_name);
	return 0;

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

static void soc_remove_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int err;

	/* unregister the rtd device */
	if (rtd->dev_registered) {
		device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
		device_unregister(&rtd->dev);
		rtd->dev_registered = 0;
	}

	/* remove the CODEC DAI */
	if (codec_dai && codec_dai->probed) {
		if (codec_dai->driver->remove) {
			err = codec_dai->driver->remove(codec_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1323
		}
1324 1325 1326
		codec_dai->probed = 0;
		list_del(&codec_dai->card_list);
	}
1327

1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
	/* remove the platform */
	if (platform && platform->probed) {
		if (platform->driver->remove) {
			err = platform->driver->remove(platform);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
		}
		platform->probed = 0;
		list_del(&platform->card_list);
		module_put(platform->dev->driver->owner);
	}
1339

1340 1341 1342 1343 1344 1345 1346
	/* remove the CODEC */
	if (codec && codec->probed) {
		if (codec->driver->remove) {
			err = codec->driver->remove(codec);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", codec->name);
		}
1347

1348 1349
		/* Make sure all DAPM widgets are freed */
		snd_soc_dapm_free(codec);
1350

1351 1352 1353 1354 1355
		soc_cleanup_codec_debugfs(codec);
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
		codec->probed = 0;
		list_del(&codec->card_list);
		module_put(codec->dev->driver->owner);
F
Frank Mandarino 已提交
1356 1357
	}

1358 1359 1360 1361 1362 1363
	/* remove the cpu_dai */
	if (cpu_dai && cpu_dai->probed) {
		if (cpu_dai->driver->remove) {
			err = cpu_dai->driver->remove(cpu_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
F
Frank Mandarino 已提交
1364
		}
1365 1366 1367
		cpu_dai->probed = 0;
		list_del(&cpu_dai->card_list);
		module_put(cpu_dai->dev->driver->owner);
F
Frank Mandarino 已提交
1368
	}
1369
}
F
Frank Mandarino 已提交
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 1404 1405 1406 1407 1408
static void rtd_release(struct device *dev) {}

static int soc_probe_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int ret;

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

	/* config components */
	codec_dai->codec = codec;
	codec->card = card;
	cpu_dai->platform = platform;
	rtd->card = card;
	rtd->dev.parent = card->dev;
	codec_dai->card = card;
	cpu_dai->card = card;

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

	/* probe the cpu_dai */
	if (!cpu_dai->probed) {
		if (cpu_dai->driver->probe) {
			ret = cpu_dai->driver->probe(cpu_dai);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
						cpu_dai->name);
				return ret;
			}
		}
		cpu_dai->probed = 1;
		/* mark cpu_dai as probed and add to card cpu_dai list */
		list_add(&cpu_dai->card_list, &card->dai_dev_list);
F
Frank Mandarino 已提交
1409 1410
	}

1411 1412 1413 1414 1415 1416 1417 1418 1419 1420
	/* probe the CODEC */
	if (!codec->probed) {
		if (codec->driver->probe) {
			ret = codec->driver->probe(codec);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe CODEC %s\n",
						codec->name);
				return ret;
			}
		}
1421 1422 1423

		soc_init_codec_debugfs(codec);

1424 1425 1426
		/* mark codec as probed and add to card codec list */
		codec->probed = 1;
		list_add(&codec->card_list, &card->codec_dev_list);
F
Frank Mandarino 已提交
1427 1428
	}

1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442
	/* probe the platform */
	if (!platform->probed) {
		if (platform->driver->probe) {
			ret = platform->driver->probe(platform);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe platform %s\n",
						platform->name);
				return ret;
			}
		}
		/* mark platform as probed and add to card platform list */
		platform->probed = 1;
		list_add(&platform->card_list, &card->platform_dev_list);
	}
1443

1444 1445 1446 1447
	/* probe the CODEC DAI */
	if (!codec_dai->probed) {
		if (codec_dai->driver->probe) {
			ret = codec_dai->driver->probe(codec_dai);
M
Mark Brown 已提交
1448
			if (ret < 0) {
1449 1450 1451
				printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
						codec_dai->name);
				return ret;
M
Mark Brown 已提交
1452 1453
			}
		}
1454 1455 1456 1457

		/* mark cpu_dai as probed and add to card cpu_dai list */
		codec_dai->probed = 1;
		list_add(&codec_dai->card_list, &card->dai_dev_list);
M
Mark Brown 已提交
1458 1459
	}

1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470
	/* DAPM dai link stream work */
	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);

	/* now that all clients have probed, initialise the DAI link */
	if (dai_link->init) {
		ret = dai_link->init(rtd);
		if (ret < 0) {
			printk(KERN_ERR "asoc: failed to init %s\n", dai_link->stream_name);
			return ret;
		}
	}
M
Mark Brown 已提交
1471 1472 1473

	/* Make sure all DAPM widgets are instantiated */
	snd_soc_dapm_new_widgets(codec);
1474
	snd_soc_dapm_sync(codec);
M
Mark Brown 已提交
1475

1476 1477 1478 1479
	/* register the rtd device */
	rtd->dev.release = rtd_release;
	rtd->dev.init_name = dai_link->name;
	ret = device_register(&rtd->dev);
M
Mark Brown 已提交
1480
	if (ret < 0) {
1481 1482
		printk(KERN_ERR "asoc: failed to register DAI runtime device %d\n", ret);
		return ret;
M
Mark Brown 已提交
1483 1484
	}

1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513
	rtd->dev_registered = 1;
	ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");

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

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

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

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

	return 0;
}

M
Mark Brown 已提交
1514
#ifdef CONFIG_SND_SOC_AC97_BUS
1515 1516 1517 1518
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
{
	int ret;

M
Mark Brown 已提交
1519 1520 1521
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
1522
	if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1523 1524 1525 1526 1527 1528 1529 1530 1531 1532
		/*
		 * It is possible that the AC97 device is already registered to
		 * the device subsystem. This happens when the device is created
		 * via snd_ac97_mixer(). Currently only SoC codec that does so
		 * is the generic AC97 glue but others migh emerge.
		 *
		 * In those cases we don't try to register the device again.
		 */
		if (!rtd->codec->ac97_created)
			return 0;
1533 1534

		ret = soc_ac97_dev_register(rtd->codec);
M
Mark Brown 已提交
1535 1536
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
1537
			return ret;
M
Mark Brown 已提交
1538
		}
1539 1540

		rtd->codec->ac97_registered = 1;
M
Mark Brown 已提交
1541
	}
1542 1543 1544 1545 1546 1547 1548 1549 1550 1551
	return 0;
}

static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
{
	if (codec->ac97_registered) {
		soc_ac97_dev_unregister(codec);
		codec->ac97_registered = 0;
	}
}
M
Mark Brown 已提交
1552 1553
#endif

1554 1555 1556 1557
static void snd_soc_instantiate_card(struct snd_soc_card *card)
{
	struct platform_device *pdev = to_platform_device(card->dev);
	int ret, i;
M
Mark Brown 已提交
1558

1559
	mutex_lock(&card->mutex);
1560

1561 1562 1563 1564
	if (card->instantiated) {
		mutex_unlock(&card->mutex);
		return;
	}
M
Mark Brown 已提交
1565

1566 1567 1568
	/* bind DAIs */
	for (i = 0; i < card->num_links; i++)
		soc_bind_dai_link(card, i);
M
Mark Brown 已提交
1569

1570 1571 1572 1573 1574
	/* bind completed ? */
	if (card->num_rtd != card->num_links) {
		mutex_unlock(&card->mutex);
		return;
	}
1575

1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590
	/* card bind complete so register a sound card */
	ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
			card->owner, 0, &card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: can't create sound card for card %s\n",
			card->name);
		mutex_unlock(&card->mutex);
		return;
	}
	card->snd_card->dev = card->dev;

#ifdef CONFIG_PM
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1591

1592 1593 1594 1595 1596 1597
	/* initialise the sound card only once */
	if (card->probe) {
		ret = card->probe(pdev);
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1598

1599 1600 1601
	for (i = 0; i < card->num_links; i++) {
		ret = soc_probe_dai_link(card, i);
		if (ret < 0) {
1602 1603
			pr_err("asoc: failed to instantiate card %s: %d\n",
			       card->name, ret);
1604 1605 1606
			goto probe_dai_err;
		}
	}
F
Frank Mandarino 已提交
1607

1608 1609 1610 1611 1612 1613 1614 1615 1616
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s",  card->name);
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->name);

	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
		goto probe_dai_err;
F
Frank Mandarino 已提交
1617 1618
	}

1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* register any AC97 codecs */
	for (i = 0; i < card->num_rtd; i++) {
			ret = soc_register_ac97_dai_link(&card->rtd[i]);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
				goto probe_dai_err;
			}
		}
#endif

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

probe_dai_err:
	for (i = 0; i < card->num_links; i++)
		soc_remove_dai_link(card, i);

card_probe_error:
1639 1640
	if (card->remove)
		card->remove(pdev);
1641 1642 1643 1644

	snd_card_free(card->snd_card);

	mutex_unlock(&card->mutex);
1645
}
F
Frank Mandarino 已提交
1646

1647
/*
1648
 * Attempt to initialise any uninitialised cards.  Must be called with
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660
 * 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)
{
1661
	struct snd_soc_card *card = platform_get_drvdata(pdev);
1662 1663 1664 1665
	int ret = 0;

	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
1666 1667 1668 1669
	INIT_LIST_HEAD(&card->dai_dev_list);
	INIT_LIST_HEAD(&card->codec_dev_list);
	INIT_LIST_HEAD(&card->platform_dev_list);

1670 1671 1672 1673 1674 1675 1676
	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
1677 1678 1679 1680 1681
}

/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
1682
	struct snd_soc_card *card = platform_get_drvdata(pdev);
F
Frank Mandarino 已提交
1683 1684
	int i;

1685
		if (card->instantiated) {
1686

1687 1688 1689 1690
		/* make sure any delayed work runs */
		for (i = 0; i < card->num_rtd; i++) {
			struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
			run_delayed_work(&rtd->delayed_work);
1691
		}
F
Frank Mandarino 已提交
1692

1693 1694 1695 1696 1697
		/* remove and free each DAI */
		for (i = 0; i < card->num_rtd; i++)
			soc_remove_dai_link(card, i);

		/* remove the card */
1698 1699
		if (card->remove)
			card->remove(pdev);
F
Frank Mandarino 已提交
1700

1701 1702 1703
		kfree(card->rtd);
		snd_card_free(card->snd_card);
	}
M
Mark Brown 已提交
1704
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
1705 1706 1707
	return 0;
}

M
Mark Brown 已提交
1708
static int soc_poweroff(struct device *dev)
M
Mark Brown 已提交
1709
{
M
Mark Brown 已提交
1710
	struct platform_device *pdev = to_platform_device(dev);
1711 1712
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	int i;
M
Mark Brown 已提交
1713 1714

	if (!card->instantiated)
M
Mark Brown 已提交
1715
		return 0;
M
Mark Brown 已提交
1716 1717 1718

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
1719 1720 1721 1722
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
		run_delayed_work(&rtd->delayed_work);
	}
M
Mark Brown 已提交
1723

1724
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
1725 1726

	return 0;
M
Mark Brown 已提交
1727 1728
}

1729
static const struct dev_pm_ops soc_pm_ops = {
M
Mark Brown 已提交
1730 1731 1732 1733 1734
	.suspend = soc_suspend,
	.resume = soc_resume,
	.poweroff = soc_poweroff,
};

F
Frank Mandarino 已提交
1735 1736 1737 1738
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
1739
		.owner		= THIS_MODULE,
M
Mark Brown 已提交
1740
		.pm		= &soc_pm_ops,
F
Frank Mandarino 已提交
1741 1742 1743 1744 1745 1746
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/* create a new pcm */
1747 1748 1749 1750 1751 1752
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
F
Frank Mandarino 已提交
1753 1754 1755 1756 1757
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	/* check client and interface hw capabilities */
1758
	snprintf(new_name, sizeof(new_name), "%s %s-%d",
1759
			rtd->dai_link->stream_name, codec_dai->name, num);
F
Frank Mandarino 已提交
1760

1761
	if (codec_dai->driver->playback.channels_min)
F
Frank Mandarino 已提交
1762
		playback = 1;
1763
	if (codec_dai->driver->capture.channels_min)
F
Frank Mandarino 已提交
1764 1765
		capture = 1;

1766 1767 1768
	dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
	ret = snd_pcm_new(rtd->card->snd_card, new_name,
			num, playback, capture, &pcm);
F
Frank Mandarino 已提交
1769
	if (ret < 0) {
1770
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
F
Frank Mandarino 已提交
1771 1772 1773
		return ret;
	}

1774
	rtd->pcm = pcm;
F
Frank Mandarino 已提交
1775
	pcm->private_data = rtd;
1776 1777 1778 1779 1780 1781 1782
	soc_pcm_ops.mmap = platform->driver->ops->mmap;
	soc_pcm_ops.pointer = platform->driver->ops->pointer;
	soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
	soc_pcm_ops.copy = platform->driver->ops->copy;
	soc_pcm_ops.silence = platform->driver->ops->silence;
	soc_pcm_ops.ack = platform->driver->ops->ack;
	soc_pcm_ops.page = platform->driver->ops->page;
F
Frank Mandarino 已提交
1783 1784 1785 1786 1787 1788 1789

	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);

1790
	ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
F
Frank Mandarino 已提交
1791 1792 1793 1794 1795
	if (ret < 0) {
		printk(KERN_ERR "asoc: platform pcm constructor failed\n");
		return ret;
	}

1796
	pcm->private_free = platform->driver->pcm_free;
F
Frank Mandarino 已提交
1797 1798 1799 1800 1801
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

1802 1803 1804 1805 1806 1807 1808 1809 1810 1811
/**
 * 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)
{
1812 1813
	if (codec->driver->volatile_register)
		return codec->driver->volatile_register(reg);
1814 1815 1816 1817 1818
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

F
Frank Mandarino 已提交
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847
/**
 * 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;
1848 1849 1850 1851 1852 1853 1854

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

F
Frank Mandarino 已提交
1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868
	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);
1869 1870 1871
#ifdef CONFIG_SND_SOC_AC97_BUS
	soc_unregister_ac97_dai_link(codec);
#endif
F
Frank Mandarino 已提交
1872 1873 1874
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
1875
	codec->ac97_created = 0;
F
Frank Mandarino 已提交
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891
	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,
1892
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1893 1894
{
	int change;
1895
	unsigned int old, new;
F
Frank Mandarino 已提交
1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906

	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);

1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917
/**
 * 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.
 */
1918 1919 1920
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
1921 1922 1923 1924 1925 1926 1927 1928 1929
{
	int change;

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

	return change;
}
1930
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1931

F
Frank Mandarino 已提交
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944
/**
 * 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,
1945
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1946 1947
{
	int change;
1948
	unsigned int old, new;
F
Frank Mandarino 已提交
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984

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

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

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

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
M
Mark Brown 已提交
1985
 * @long_name: control long name
F
Frank Mandarino 已提交
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
 *
 * 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
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
/**
 * 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)
{
2019
	struct snd_card *card = codec->card->snd_card;
I
Ian Molton 已提交
2020 2021 2022 2023 2024 2025
	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) {
2026 2027
			dev_err(codec->dev, "%s: Failed to add %s: %d\n",
				codec->name, control->name, err);
I
Ian Molton 已提交
2028 2029 2030 2031 2032 2033 2034 2035
			return err;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_controls);

F
Frank Mandarino 已提交
2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052
/**
 * 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;
2053
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
2054

2055 2056
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
2057 2058 2059 2060 2061 2062 2063 2064 2065
	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
2066
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2067 2068 2069 2070 2071 2072 2073 2074 2075 2076
 *
 * 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;
2077
	unsigned int val, bitmask;
F
Frank Mandarino 已提交
2078

2079
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2080 2081
		;
	val = snd_soc_read(codec, e->reg);
2082 2083
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
F
Frank Mandarino 已提交
2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094
	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
2095
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2096 2097 2098 2099 2100 2101 2102 2103 2104 2105
 *
 * 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;
2106 2107
	unsigned int val;
	unsigned int mask, bitmask;
F
Frank Mandarino 已提交
2108

2109
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2110
		;
2111
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
2112 2113 2114 2115
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
2116
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
Frank Mandarino 已提交
2117 2118 2119 2120 2121
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

2122
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
F
Frank Mandarino 已提交
2123 2124 2125
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141
/**
 * 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);
2142
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2143
	unsigned int reg_val, val, mux;
P
Peter Ujfalusi 已提交
2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180

	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);
2181
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2182 2183
	unsigned int val;
	unsigned int mask;
P
Peter Ujfalusi 已提交
2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195

	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;
	}

2196
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
P
Peter Ujfalusi 已提交
2197 2198 2199
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

F
Frank Mandarino 已提交
2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216
/**
 * 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;
2217
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
2218

2219 2220
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238
	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
2239 2240
	int max = kcontrol->private_value;

2241
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2242 2243 2244
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2245 2246 2247

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
2248
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264
	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)
{
2265 2266
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2267
	int platform_max;
2268
	unsigned int shift = mc->shift;
2269
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
2270

2271 2272 2273 2274 2275
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2276 2277 2278 2279
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
Frank Mandarino 已提交
2280 2281
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
2282
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2283 2284 2285 2286 2287 2288 2289
	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
2290
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2291 2292 2293 2294 2295 2296 2297 2298
 *
 * 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)
{
2299 2300
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2301
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2302 2303 2304
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2305
	int max = mc->max;
2306 2307
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2308 2309 2310 2311 2312 2313 2314 2315

	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
2316
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2317 2318
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2319
				max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2320 2321 2322 2323 2324 2325 2326 2327 2328
	}

	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
2329
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2330 2331 2332 2333 2334 2335 2336 2337
 *
 * 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)
{
2338 2339
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2340
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2341 2342 2343
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2344
	int max = mc->max;
2345 2346
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2347
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2348 2349 2350

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
2351
		val = max - val;
F
Frank Mandarino 已提交
2352 2353 2354 2355 2356
	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
2357
			val2 = max - val2;
F
Frank Mandarino 已提交
2358 2359 2360
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
2361
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
F
Frank Mandarino 已提交
2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377
}
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)
{
2378 2379
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2380
	int platform_max;
P
Philipp Zabel 已提交
2381

2382 2383 2384 2385 2386
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2387 2388 2389
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2390 2391 2392

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2393
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2394 2395 2396 2397 2398 2399 2400
	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
2401
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2402 2403 2404 2405 2406 2407 2408 2409
 *
 * 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)
{
2410 2411
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2412
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2413 2414 2415
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2416
	int max = mc->max;
2417
	unsigned int mask = (1 << fls(max)) - 1;
2418
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2419 2420 2421 2422 2423 2424 2425

	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
2426
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2427
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2428
			max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2429 2430 2431 2432 2433 2434 2435 2436 2437
	}

	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
2438
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2439 2440 2441 2442 2443 2444 2445 2446
 *
 * 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)
{
2447 2448
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2449
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2450 2451 2452
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2453
	int max = mc->max;
2454 2455
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2456
	int err;
2457
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2458 2459 2460 2461 2462 2463

	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
2464 2465
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
2466 2467 2468 2469 2470
	}

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

2471
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2472
	if (err < 0)
F
Frank Mandarino 已提交
2473 2474
		return err;

2475
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
F
Frank Mandarino 已提交
2476 2477 2478 2479
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491
/**
 * 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)
{
2492 2493
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2494
	int platform_max;
2495
	int min = mc->min;
2496

2497 2498 2499 2500
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

2501 2502 2503
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2504
	uinfo->value.integer.max = platform_max - min;
2505 2506 2507 2508 2509 2510 2511
	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
2512
 * @ucontrol: control element information
2513 2514 2515 2516 2517 2518 2519 2520
 *
 * 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)
{
2521 2522
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2523
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2524
	unsigned int reg = mc->reg;
2525
	int min = mc->min;
2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538
	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
2539
 * @ucontrol: control element information
2540 2541 2542 2543 2544 2545 2546 2547
 *
 * 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)
{
2548 2549
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2550
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2551
	unsigned int reg = mc->reg;
2552
	int min = mc->min;
2553
	unsigned int val;
2554 2555 2556 2557

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

2558
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2559 2560 2561
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573
/**
 * snd_soc_limit_volume - Set new limit to an existing volume control.
 *
 * @codec: where to look for the control
 * @name: Name of the control
 * @max: new maximum limit
 *
 * Return 0 for success, else error.
 */
int snd_soc_limit_volume(struct snd_soc_codec *codec,
	const char *name, int max)
{
2574
	struct snd_card *card = codec->card->snd_card;
2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592
	struct snd_kcontrol *kctl;
	struct soc_mixer_control *mc;
	int found = 0;
	int ret = -EINVAL;

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

	list_for_each_entry(kctl, &card->controls, list) {
		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
			found = 1;
			break;
		}
	}
	if (found) {
		mc = (struct soc_mixer_control *)kctl->private_value;
		if (max <= mc->max) {
2593
			mc->platform_max = max;
2594 2595 2596 2597 2598 2599 2600
			ret = 0;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);

2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644
/**
 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
 *  mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_info *uinfo)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;

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

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);

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

2645 2646
	ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
	ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);

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

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

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

	ret = 0;
	if (oval != val) {
		ret = snd_soc_write(codec, mc->reg, val);
		if (ret < 0)
2682
			return ret;
2683 2684 2685 2686
	}
	if (ovalr != valr) {
		ret = snd_soc_write(codec, mc->rreg, valr);
		if (ret < 0)
2687
			return ret;
2688 2689 2690 2691 2692 2693
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);

2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705
/**
 * 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)
{
2706 2707
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2708 2709 2710 2711 2712 2713 2714 2715
	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
2716
 * @div_id: DAI specific clock divider ID
2717 2718 2719 2720 2721 2722 2723 2724 2725
 * @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)
{
2726 2727
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
2728 2729 2730 2731 2732 2733 2734 2735 2736
	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
2737
 * @source: DAI specific source for the PLL
2738 2739 2740 2741 2742
 * @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.
 */
2743 2744
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
2745
{
2746 2747
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
2748
					 freq_in, freq_out);
2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762
	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)
{
2763 2764
	if (dai->driver && dai->driver->ops->set_fmt)
		return dai->driver->ops->set_fmt(dai, fmt);
2765 2766 2767 2768 2769 2770 2771 2772
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
2773 2774
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
2775
 * @slots: Number of slots in use.
2776
 * @slot_width: Width in bits for each slot.
2777 2778 2779 2780 2781
 *
 * 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,
2782
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2783
{
2784 2785
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2786
				slots, slot_width);
2787 2788 2789 2790 2791
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807
/**
 * 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)
{
2808 2809
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2810 2811 2812 2813 2814 2815
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

2816 2817 2818 2819 2820 2821 2822 2823 2824
/**
 * 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)
{
2825 2826
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840
	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)
{
2841 2842
	if (dai->driver && dai->driver->ops->digital_mute)
		return dai->driver->ops->digital_mute(dai, mute);
2843 2844 2845 2846 2847
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
2848 2849 2850
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2851
 * @card: Card to register
M
Mark Brown 已提交
2852 2853 2854 2855 2856 2857 2858
 *
 * 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)
{
2859 2860
	int i;

M
Mark Brown 已提交
2861 2862 2863
	if (!card->name || !card->dev)
		return -EINVAL;

2864 2865 2866 2867 2868 2869 2870 2871
	card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) * card->num_links,
			GFP_KERNEL);
	if (card->rtd == NULL)
		return -ENOMEM;

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

M
Mark Brown 已提交
2872 2873
	INIT_LIST_HEAD(&card->list);
	card->instantiated = 0;
2874
	mutex_init(&card->mutex);
M
Mark Brown 已提交
2875 2876 2877

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
2878
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2879 2880 2881 2882 2883 2884 2885 2886 2887 2888
	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
2889
 * @card: Card to unregister
M
Mark Brown 已提交
2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904
 *
 * 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;
}

2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
static inline char *fmt_single_name(struct device *dev, int *id)
{
	char *found, name[NAME_SIZE];
	int id1, id2;

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

	strncpy(name, dev_name(dev), NAME_SIZE);

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

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

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

			/* create unique ID number from I2C addr and bus */
2936
			*id = ((id1 & 0xffff) << 16) + id2;
2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
			strncpy(name, tmp, NAME_SIZE);
		} else
			*id = 0;
	}

	return kstrdup(name, GFP_KERNEL);
}

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

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

M
Mark Brown 已提交
2964 2965 2966
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
2967
 * @dai: DAI to register
M
Mark Brown 已提交
2968
 */
2969 2970
int snd_soc_register_dai(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
M
Mark Brown 已提交
2971
{
2972 2973 2974
	struct snd_soc_dai *dai;

	dev_dbg(dev, "dai register %s\n", dev_name(dev));
M
Mark Brown 已提交
2975

2976 2977 2978
	dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
	if (dai == NULL)
			return -ENOMEM;
M
Mark Brown 已提交
2979

2980 2981 2982 2983 2984 2985
	/* create DAI component name */
	dai->name = fmt_single_name(dev, &dai->id);
	if (dai->name == NULL) {
		kfree(dai);
		return -ENOMEM;
	}
2986

2987 2988 2989 2990
	dai->dev = dev;
	dai->driver = dai_drv;
	if (!dai->driver->ops)
		dai->driver->ops = &null_dai_ops;
M
Mark Brown 已提交
2991 2992 2993

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
2994
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005
	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
3006
 * @dai: DAI to unregister
M
Mark Brown 已提交
3007
 */
3008
void snd_soc_unregister_dai(struct device *dev)
M
Mark Brown 已提交
3009
{
3010 3011 3012 3013 3014 3015 3016 3017 3018
	struct snd_soc_dai *dai;

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

found:
M
Mark Brown 已提交
3019 3020 3021 3022 3023
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered DAI '%s'\n", dai->name);
3024 3025
	kfree(dai->name);
	kfree(dai);
M
Mark Brown 已提交
3026 3027 3028 3029 3030 3031
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
3032 3033
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
3034
 */
3035 3036
int snd_soc_register_dais(struct device *dev,
		struct snd_soc_dai_driver *dai_drv, size_t count)
M
Mark Brown 已提交
3037
{
3038 3039 3040
	struct snd_soc_dai *dai;
	int i, ret = 0;

3041
	dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
3042 3043

	for (i = 0; i < count; i++) {
3044 3045

		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3046 3047 3048 3049
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
3050 3051 3052 3053 3054 3055

		/* create DAI component name */
		dai->name = fmt_multiple_name(dev, &dai_drv[i]);
		if (dai->name == NULL) {
			kfree(dai);
			ret = -EINVAL;
M
Mark Brown 已提交
3056
			goto err;
3057 3058 3059 3060
		}

		dai->dev = dev;
		dai->driver = &dai_drv[i];
3061 3062 3063 3064
		if (dai->driver->id)
			dai->id = dai->driver->id;
		else
			dai->id = i;
3065 3066 3067 3068 3069 3070 3071 3072
		if (!dai->driver->ops)
			dai->driver->ops = &null_dai_ops;

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

		pr_debug("Registered DAI '%s'\n", dai->name);
M
Mark Brown 已提交
3073 3074
	}

3075
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3076 3077 3078 3079
	return 0;

err:
	for (i--; i >= 0; i--)
3080
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3081 3082 3083 3084 3085 3086 3087 3088

	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
3089 3090
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
3091
 */
3092
void snd_soc_unregister_dais(struct device *dev, size_t count)
M
Mark Brown 已提交
3093 3094 3095 3096
{
	int i;

	for (i = 0; i < count; i++)
3097
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3098 3099 3100
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);

M
Mark Brown 已提交
3101 3102 3103
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
3104
 * @platform: platform to register
M
Mark Brown 已提交
3105
 */
3106 3107
int snd_soc_register_platform(struct device *dev,
		struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
3108
{
3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122
	struct snd_soc_platform *platform;

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

	platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
	if (platform == NULL)
			return -ENOMEM;

	/* create platform component name */
	platform->name = fmt_single_name(dev, &platform->id);
	if (platform->name == NULL) {
		kfree(platform);
		return -ENOMEM;
	}
M
Mark Brown 已提交
3123

3124 3125
	platform->dev = dev;
	platform->driver = platform_drv;
M
Mark Brown 已提交
3126 3127 3128

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
3129
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140
	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
3141
 * @platform: platform to unregister
M
Mark Brown 已提交
3142
 */
3143
void snd_soc_unregister_platform(struct device *dev)
M
Mark Brown 已提交
3144
{
3145 3146 3147 3148 3149 3150 3151 3152 3153
	struct snd_soc_platform *platform;

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

found:
M
Mark Brown 已提交
3154 3155 3156 3157 3158
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered platform '%s'\n", platform->name);
3159 3160
	kfree(platform->name);
	kfree(platform);
M
Mark Brown 已提交
3161 3162 3163
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196
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
3197 3198 3199
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
3200
 * @codec: codec to register
M
Mark Brown 已提交
3201
 */
3202 3203 3204
int snd_soc_register_codec(struct device *dev,
		struct snd_soc_codec_driver *codec_drv,
		struct snd_soc_dai_driver *dai_drv, int num_dai)
M
Mark Brown 已提交
3205
{
3206 3207
	struct snd_soc_codec *codec;
	int ret, i;
3208

3209 3210 3211 3212 3213
	dev_dbg(dev, "codec register %s\n", dev_name(dev));

	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;
M
Mark Brown 已提交
3214

3215 3216 3217 3218 3219 3220 3221 3222 3223
	/* create CODEC component name */
	codec->name = fmt_single_name(dev, &codec->id);
	if (codec->name == NULL) {
		kfree(codec);
		return -ENOMEM;
	}

	/* allocate CODEC register cache */
	if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
M
Mark Brown 已提交
3224

3225 3226 3227 3228 3229 3230
		if (codec_drv->reg_cache_default)
			codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
				codec_drv->reg_cache_size * codec_drv->reg_word_size, GFP_KERNEL);
		else
			codec->reg_cache = kzalloc(codec_drv->reg_cache_size *
				codec_drv->reg_word_size, GFP_KERNEL);
M
Mark Brown 已提交
3231

3232 3233 3234 3235 3236
		if (codec->reg_cache == NULL) {
			kfree(codec->name);
			kfree(codec);
			return -ENOMEM;
		}
3237 3238
	}

3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251
	codec->dev = dev;
	codec->driver = codec_drv;
	codec->bias_level = SND_SOC_BIAS_OFF;
	codec->num_dai = num_dai;
	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

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

3252 3253 3254 3255
	/* register any DAIs */
	if (num_dai) {
		ret = snd_soc_register_dais(dev, dai_drv, num_dai);
		if (ret < 0)
3256
			goto error;
3257
	}
3258

M
Mark Brown 已提交
3259 3260 3261 3262 3263 3264 3265
	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;
3266 3267 3268 3269 3270 3271 3272

error:
	if (codec->reg_cache)
		kfree(codec->reg_cache);
	kfree(codec->name);
	kfree(codec);
	return ret;
M
Mark Brown 已提交
3273 3274 3275 3276 3277 3278
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
3279
 * @codec: codec to unregister
M
Mark Brown 已提交
3280
 */
3281
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
3282
{
3283 3284 3285 3286 3287 3288 3289 3290 3291 3292
	struct snd_soc_codec *codec;
	int i;

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

found:
3293 3294 3295
	if (codec->num_dai)
		for (i = 0; i < codec->num_dai; i++)
			snd_soc_unregister_dai(dev);
3296

M
Mark Brown 已提交
3297 3298 3299 3300 3301
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered codec '%s'\n", codec->name);
3302 3303 3304

	if (codec->reg_cache)
		kfree(codec->reg_cache);
3305
	kfree(codec->name);
3306
	kfree(codec);
M
Mark Brown 已提交
3307 3308 3309
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

3310
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
3311
{
3312 3313 3314 3315 3316 3317 3318
#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;
	}
3319 3320 3321 3322 3323

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

M
Mark Brown 已提交
3324 3325 3326
	if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3327 3328 3329 3330

	if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
3331 3332
#endif

F
Frank Mandarino 已提交
3333 3334
	return platform_driver_register(&soc_driver);
}
3335
module_init(snd_soc_init);
F
Frank Mandarino 已提交
3336

M
Mark Brown 已提交
3337
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
3338
{
3339 3340 3341
#ifdef CONFIG_DEBUG_FS
	debugfs_remove_recursive(debugfs_root);
#endif
3342
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
3343 3344 3345 3346
}
module_exit(snd_soc_exit);

/* Module information */
3347
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
3348 3349
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
3350
MODULE_ALIAS("platform:soc-audio");