soc-core.c 59.1 KB
Newer Older
F
Frank Mandarino 已提交
1 2 3 4
/*
 * soc-core.c  --  ALSA SoC Audio Layer
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
5 6
 * Copyright 2005 Openedhand Ltd.
 *
7
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 9
 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
F
Frank Mandarino 已提交
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  TODO:
 *   o Add hw rules to enforce rates, etc.
 *   o More testing with other codecs/machines.
 *   o Add more codecs and platforms to ensure good API coverage.
 *   o Support TDM on PCM and I2S
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
29
#include <linux/debugfs.h>
F
Frank Mandarino 已提交
30 31 32 33 34 35 36 37 38 39 40 41
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

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

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

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

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

F
Frank Mandarino 已提交
55 56 57 58 59 60 61 62 63
/*
 * This is a timeout to do a DAPM powerdown after a stream is closed().
 * It can be used to eliminate pops between different playback streams, e.g.
 * between two audio tracks.
 */
static int pmdown_time = 5000;
module_param(pmdown_time, int, 0);
MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");

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

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

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

F
Frank Mandarino 已提交
83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
#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;
	codec->ac97->dev.parent = NULL;
	codec->ac97->dev.release = soc_ac97_device_release;

104 105
	dev_set_name(&codec->ac97->dev, "%d-%d:%s",
		     codec->card->number, 0, codec->name);
F
Frank Mandarino 已提交
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124
	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

/*
 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 * then initialized and any private data can be allocated. This also calls
 * startup for the cpu DAI, platform, machine and codec DAI.
 */
static int soc_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
125
	struct snd_soc_card *card = socdev->card;
F
Frank Mandarino 已提交
126
	struct snd_pcm_runtime *runtime = substream->runtime;
127
	struct snd_soc_dai_link *machine = rtd->dai;
128
	struct snd_soc_platform *platform = card->platform;
129 130
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
131 132 133 134 135
	int ret = 0;

	mutex_lock(&pcm_mutex);

	/* startup the audio subsystem */
136
	if (cpu_dai->ops.startup) {
137
		ret = cpu_dai->ops.startup(substream, cpu_dai);
F
Frank Mandarino 已提交
138 139
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open interface %s\n",
140
				cpu_dai->name);
F
Frank Mandarino 已提交
141 142 143 144 145 146 147 148 149 150 151 152
			goto out;
		}
	}

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

153
	if (codec_dai->ops.startup) {
154
		ret = codec_dai->ops.startup(substream, codec_dai);
F
Frank Mandarino 已提交
155
		if (ret < 0) {
156 157 158
			printk(KERN_ERR "asoc: can't open codec %s\n",
				codec_dai->name);
			goto codec_dai_err;
F
Frank Mandarino 已提交
159 160 161
		}
	}

162 163
	if (machine->ops && machine->ops->startup) {
		ret = machine->ops->startup(substream);
F
Frank Mandarino 已提交
164
		if (ret < 0) {
165 166
			printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
			goto machine_err;
F
Frank Mandarino 已提交
167 168 169 170 171 172
		}
	}

	/* Check that the codec and cpu DAI's are compatible */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
173 174
			max(codec_dai->playback.rate_min,
			    cpu_dai->playback.rate_min);
F
Frank Mandarino 已提交
175
		runtime->hw.rate_max =
176 177
			min(codec_dai->playback.rate_max,
			    cpu_dai->playback.rate_max);
F
Frank Mandarino 已提交
178
		runtime->hw.channels_min =
179 180
			max(codec_dai->playback.channels_min,
				cpu_dai->playback.channels_min);
F
Frank Mandarino 已提交
181
		runtime->hw.channels_max =
182 183 184 185 186 187
			min(codec_dai->playback.channels_max,
				cpu_dai->playback.channels_max);
		runtime->hw.formats =
			codec_dai->playback.formats & cpu_dai->playback.formats;
		runtime->hw.rates =
			codec_dai->playback.rates & cpu_dai->playback.rates;
F
Frank Mandarino 已提交
188 189
	} else {
		runtime->hw.rate_min =
190 191
			max(codec_dai->capture.rate_min,
			    cpu_dai->capture.rate_min);
F
Frank Mandarino 已提交
192
		runtime->hw.rate_max =
193 194
			min(codec_dai->capture.rate_max,
			    cpu_dai->capture.rate_max);
F
Frank Mandarino 已提交
195
		runtime->hw.channels_min =
196 197
			max(codec_dai->capture.channels_min,
				cpu_dai->capture.channels_min);
F
Frank Mandarino 已提交
198
		runtime->hw.channels_max =
199 200 201 202 203 204
			min(codec_dai->capture.channels_max,
				cpu_dai->capture.channels_max);
		runtime->hw.formats =
			codec_dai->capture.formats & cpu_dai->capture.formats;
		runtime->hw.rates =
			codec_dai->capture.rates & cpu_dai->capture.rates;
F
Frank Mandarino 已提交
205 206 207 208 209
	}

	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
210 211
			codec_dai->name, cpu_dai->name);
		goto machine_err;
F
Frank Mandarino 已提交
212 213 214
	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
215 216
			codec_dai->name, cpu_dai->name);
		goto machine_err;
F
Frank Mandarino 已提交
217 218 219
	}
	if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
220 221
			codec_dai->name, cpu_dai->name);
		goto machine_err;
F
Frank Mandarino 已提交
222 223
	}

224 225 226 227 228 229
	pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
	pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
	pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
		 runtime->hw.channels_max);
	pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
		 runtime->hw.rate_max);
F
Frank Mandarino 已提交
230 231

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
232
		cpu_dai->playback.active = codec_dai->playback.active = 1;
F
Frank Mandarino 已提交
233
	else
234 235 236
		cpu_dai->capture.active = codec_dai->capture.active = 1;
	cpu_dai->active = codec_dai->active = 1;
	cpu_dai->runtime = runtime;
F
Frank Mandarino 已提交
237 238 239 240
	socdev->codec->active++;
	mutex_unlock(&pcm_mutex);
	return 0;

241
machine_err:
F
Frank Mandarino 已提交
242 243 244
	if (machine->ops && machine->ops->shutdown)
		machine->ops->shutdown(substream);

245
codec_dai_err:
F
Frank Mandarino 已提交
246 247 248 249
	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);

platform_err:
250
	if (cpu_dai->ops.shutdown)
251
		cpu_dai->ops.shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
252 253 254 255 256 257
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
258
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
259 260 261
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
262
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
263
{
264 265 266
	struct snd_soc_card *card = container_of(work, struct snd_soc_card,
						 delayed_work.work);
	struct snd_soc_device *socdev = card->socdev;
F
Frank Mandarino 已提交
267
	struct snd_soc_codec *codec = socdev->codec;
268
	struct snd_soc_dai *codec_dai;
F
Frank Mandarino 已提交
269 270 271
	int i;

	mutex_lock(&pcm_mutex);
272
	for (i = 0; i < codec->num_dai; i++) {
F
Frank Mandarino 已提交
273 274
		codec_dai = &codec->dai[i];

275 276 277 278
		pr_debug("pop wq checking: %s status: %s waiting: %s\n",
			 codec_dai->playback.stream_name,
			 codec_dai->playback.active ? "active" : "inactive",
			 codec_dai->pop_wait ? "yes" : "no");
F
Frank Mandarino 已提交
279 280 281 282

		/* are we waiting on this codec DAI stream */
		if (codec_dai->pop_wait == 1) {

283
			/* Reduce power if no longer active */
284
			if (codec->active == 0) {
285 286
				pr_debug("pop wq D1 %s %s\n", codec->name,
					 codec_dai->playback.stream_name);
287 288
				snd_soc_dapm_set_bias_level(socdev,
					SND_SOC_BIAS_PREPARE);
289 290
			}

F
Frank Mandarino 已提交
291
			codec_dai->pop_wait = 0;
292 293
			snd_soc_dapm_stream_event(codec,
				codec_dai->playback.stream_name,
F
Frank Mandarino 已提交
294 295
				SND_SOC_DAPM_STREAM_STOP);

296
			/* Fall into standby if no longer active */
F
Frank Mandarino 已提交
297
			if (codec->active == 0) {
298 299
				pr_debug("pop wq D3 %s %s\n", codec->name,
					 codec_dai->playback.stream_name);
300 301
				snd_soc_dapm_set_bias_level(socdev,
					SND_SOC_BIAS_STANDBY);
F
Frank Mandarino 已提交
302 303 304 305 306 307 308 309 310 311 312 313 314 315 316
			}
		}
	}
	mutex_unlock(&pcm_mutex);
}

/*
 * Called by ALSA when a PCM substream is closed. Private data can be
 * freed here. The cpu DAI, codec DAI, machine and platform are also
 * shutdown.
 */
static int soc_codec_close(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
317
	struct snd_soc_card *card = socdev->card;
318
	struct snd_soc_dai_link *machine = rtd->dai;
319
	struct snd_soc_platform *platform = card->platform;
320 321
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
322 323 324 325 326
	struct snd_soc_codec *codec = socdev->codec;

	mutex_lock(&pcm_mutex);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
327
		cpu_dai->playback.active = codec_dai->playback.active = 0;
F
Frank Mandarino 已提交
328
	else
329
		cpu_dai->capture.active = codec_dai->capture.active = 0;
F
Frank Mandarino 已提交
330

331 332 333
	if (codec_dai->playback.active == 0 &&
		codec_dai->capture.active == 0) {
		cpu_dai->active = codec_dai->active = 0;
F
Frank Mandarino 已提交
334 335 336
	}
	codec->active--;

337 338 339 340 341 342
	/* 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);

343
	if (cpu_dai->ops.shutdown)
344
		cpu_dai->ops.shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
345

346
	if (codec_dai->ops.shutdown)
347
		codec_dai->ops.shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
348 349 350 351 352 353

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

	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);
354
	cpu_dai->runtime = NULL;
F
Frank Mandarino 已提交
355 356 357

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
358
		codec_dai->pop_wait = 1;
359
		schedule_delayed_work(&card->delayed_work,
F
Frank Mandarino 已提交
360 361 362
			msecs_to_jiffies(pmdown_time));
	} else {
		/* capture streams can be powered down now */
363
		snd_soc_dapm_stream_event(codec,
364 365
			codec_dai->capture.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
366

367
		if (codec->active == 0 && codec_dai->pop_wait == 0)
368 369
			snd_soc_dapm_set_bias_level(socdev,
						SND_SOC_BIAS_STANDBY);
F
Frank Mandarino 已提交
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384
	}

	mutex_unlock(&pcm_mutex);
	return 0;
}

/*
 * Called by ALSA when the PCM substream is prepared, can set format, sample
 * rate, etc.  This function is non atomic and can be called multiple times,
 * it can refer to the runtime info.
 */
static int soc_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
385
	struct snd_soc_card *card = socdev->card;
386
	struct snd_soc_dai_link *machine = rtd->dai;
387
	struct snd_soc_platform *platform = card->platform;
388 389
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
390 391 392 393
	struct snd_soc_codec *codec = socdev->codec;
	int ret = 0;

	mutex_lock(&pcm_mutex);
394 395 396 397 398 399 400 401 402

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

F
Frank Mandarino 已提交
403 404
	if (platform->pcm_ops->prepare) {
		ret = platform->pcm_ops->prepare(substream);
405 406
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
407
			goto out;
408
		}
F
Frank Mandarino 已提交
409 410
	}

411
	if (codec_dai->ops.prepare) {
412
		ret = codec_dai->ops.prepare(substream, codec_dai);
413 414
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
415
			goto out;
416
		}
F
Frank Mandarino 已提交
417 418
	}

419
	if (cpu_dai->ops.prepare) {
420
		ret = cpu_dai->ops.prepare(substream, cpu_dai);
421 422 423 424 425
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
426

427 428 429 430
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
431
		cancel_delayed_work(&card->delayed_work);
432
	}
F
Frank Mandarino 已提交
433

434 435 436 437
	/* do we need to power up codec */
	if (codec->bias_level != SND_SOC_BIAS_ON) {
		snd_soc_dapm_set_bias_level(socdev,
					    SND_SOC_BIAS_PREPARE);
F
Frank Mandarino 已提交
438

439 440
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			snd_soc_dapm_stream_event(codec,
441
					codec_dai->playback.stream_name,
F
Frank Mandarino 已提交
442
					SND_SOC_DAPM_STREAM_START);
443 444
		else
			snd_soc_dapm_stream_event(codec,
445
					codec_dai->capture.stream_name,
F
Frank Mandarino 已提交
446 447
					SND_SOC_DAPM_STREAM_START);

448 449
		snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_ON);
		snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
450

451 452 453 454
	} else {
		/* codec already powered - power on widgets */
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			snd_soc_dapm_stream_event(codec,
455
					codec_dai->playback.stream_name,
F
Frank Mandarino 已提交
456
					SND_SOC_DAPM_STREAM_START);
457 458
		else
			snd_soc_dapm_stream_event(codec,
459
					codec_dai->capture.stream_name,
F
Frank Mandarino 已提交
460
					SND_SOC_DAPM_STREAM_START);
461

462
		snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
	}

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

/*
 * Called by ALSA when the hardware params are set by application. This
 * function can also be called multiple times and can allocate buffers
 * (using snd_pcm_lib_* ). It's non-atomic.
 */
static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
480
	struct snd_soc_dai_link *machine = rtd->dai;
481 482
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
483 484
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
485 486 487 488
	int ret = 0;

	mutex_lock(&pcm_mutex);

489 490 491 492
	if (machine->ops && machine->ops->hw_params) {
		ret = machine->ops->hw_params(substream, params);
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
Frank Mandarino 已提交
493
			goto out;
494
		}
F
Frank Mandarino 已提交
495 496
	}

497
	if (codec_dai->ops.hw_params) {
498
		ret = codec_dai->ops.hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
499 500
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
501 502
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
503 504 505
		}
	}

506
	if (cpu_dai->ops.hw_params) {
507
		ret = cpu_dai->ops.hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
508
		if (ret < 0) {
509
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
510
				cpu_dai->name);
F
Frank Mandarino 已提交
511 512 513 514 515 516 517
			goto interface_err;
		}
	}

	if (platform->pcm_ops->hw_params) {
		ret = platform->pcm_ops->hw_params(substream, params);
		if (ret < 0) {
518
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
519 520 521 522 523 524 525 526 527 528
				platform->name);
			goto platform_err;
		}
	}

out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
529
	if (cpu_dai->ops.hw_free)
530
		cpu_dai->ops.hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
531 532

interface_err:
533
	if (codec_dai->ops.hw_free)
534
		codec_dai->ops.hw_free(substream, codec_dai);
535 536

codec_err:
537
	if (machine->ops && machine->ops->hw_free)
538
		machine->ops->hw_free(substream);
F
Frank Mandarino 已提交
539 540 541 542 543 544 545 546 547 548 549 550

	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
 * Free's resources allocated by hw_params, can be called multiple times
 */
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
551
	struct snd_soc_dai_link *machine = rtd->dai;
552 553
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
554 555
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
556 557 558 559 560
	struct snd_soc_codec *codec = socdev->codec;

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
561 562
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
563 564 565 566 567 568 569 570 571 572

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

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

	/* now free hw params for the DAI's  */
573
	if (codec_dai->ops.hw_free)
574
		codec_dai->ops.hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
575

576
	if (cpu_dai->ops.hw_free)
577
		cpu_dai->ops.hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
578 579 580 581 582 583 584 585 586

	mutex_unlock(&pcm_mutex);
	return 0;
}

static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
587
	struct snd_soc_card *card= socdev->card;
588
	struct snd_soc_dai_link *machine = rtd->dai;
589
	struct snd_soc_platform *platform = card->platform;
590 591
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
592 593
	int ret;

594
	if (codec_dai->ops.trigger) {
595
		ret = codec_dai->ops.trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
596 597 598 599 600 601 602 603 604 605
		if (ret < 0)
			return ret;
	}

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

606
	if (cpu_dai->ops.trigger) {
607
		ret = cpu_dai->ops.trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627
		if (ret < 0)
			return ret;
	}
	return 0;
}

/* ASoC PCM operations */
static struct snd_pcm_ops soc_pcm_ops = {
	.open		= soc_pcm_open,
	.close		= soc_codec_close,
	.hw_params	= soc_pcm_hw_params,
	.hw_free	= soc_pcm_hw_free,
	.prepare	= soc_pcm_prepare,
	.trigger	= soc_pcm_trigger,
};

#ifdef CONFIG_PM
/* powers down audio subsystem for suspend */
static int soc_suspend(struct platform_device *pdev, pm_message_t state)
{
628
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
629
	struct snd_soc_card *card = socdev->card;
630
	struct snd_soc_platform *platform = card->platform;
631
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
F
Frank Mandarino 已提交
632 633 634
	struct snd_soc_codec *codec = socdev->codec;
	int i;

635 636 637 638 639 640 641 642 643 644
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
	snd_power_lock(codec->card);
	snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(codec->card);

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

F
Frank Mandarino 已提交
645
	/* mute any active DAC's */
646 647 648 649
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
		if (dai->ops.digital_mute && dai->playback.active)
			dai->ops.digital_mute(dai, 1);
F
Frank Mandarino 已提交
650 651
	}

652
	/* suspend all pcms */
653 654
	for (i = 0; i < card->num_links; i++)
		snd_pcm_suspend_all(card->dai_link[i].pcm);
655

656 657
	if (card->suspend_pre)
		card->suspend_pre(pdev, state);
F
Frank Mandarino 已提交
658

659 660
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai  *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
661
		if (cpu_dai->suspend && !cpu_dai->ac97_control)
662
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
663
		if (platform->suspend)
664
			platform->suspend(cpu_dai);
F
Frank Mandarino 已提交
665 666 667
	}

	/* close any waiting streams and save state */
668
	run_delayed_work(&card->delayed_work);
669
	codec->suspend_bias_level = codec->bias_level;
F
Frank Mandarino 已提交
670

671
	for (i = 0; i < codec->num_dai; i++) {
F
Frank Mandarino 已提交
672 673 674 675 676 677 678 679 680 681 682 683 684
		char *stream = codec->dai[i].playback.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_SUSPEND);
		stream = codec->dai[i].capture.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

	if (codec_dev->suspend)
		codec_dev->suspend(pdev, state);

685 686
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
687
		if (cpu_dai->suspend && cpu_dai->ac97_control)
688
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
689 690
	}

691 692
	if (card->suspend_post)
		card->suspend_post(pdev, state);
F
Frank Mandarino 已提交
693 694 695 696

	return 0;
}

697 698 699 700
/* 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
701
{
702 703 704 705
	struct snd_soc_card *card = container_of(work,
						 struct snd_soc_card,
						 deferred_resume_work);
	struct snd_soc_device *socdev = card->socdev;
706
	struct snd_soc_platform *platform = card->platform;
707
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
F
Frank Mandarino 已提交
708
	struct snd_soc_codec *codec = socdev->codec;
709
	struct platform_device *pdev = to_platform_device(socdev->dev);
F
Frank Mandarino 已提交
710 711
	int i;

712 713 714 715
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

716
	dev_dbg(socdev->dev, "starting resume work\n");
717

718 719
	if (card->resume_pre)
		card->resume_pre(pdev);
F
Frank Mandarino 已提交
720

721 722
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
723
		if (cpu_dai->resume && cpu_dai->ac97_control)
724
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
725 726 727 728 729
	}

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

730 731
	for (i = 0; i < codec->num_dai; i++) {
		char *stream = codec->dai[i].playback.stream_name;
F
Frank Mandarino 已提交
732 733 734 735 736 737 738 739 740
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_RESUME);
		stream = codec->dai[i].capture.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_RESUME);
	}

741
	/* unmute any active DACs */
742 743 744 745
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
		if (dai->ops.digital_mute && dai->playback.active)
			dai->ops.digital_mute(dai, 0);
F
Frank Mandarino 已提交
746 747
	}

748 749
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
M
Mark Brown 已提交
750
		if (cpu_dai->resume && !cpu_dai->ac97_control)
751
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
752
		if (platform->resume)
753
			platform->resume(cpu_dai);
F
Frank Mandarino 已提交
754 755
	}

756 757
	if (card->resume_post)
		card->resume_post(pdev);
F
Frank Mandarino 已提交
758

759
	dev_dbg(socdev->dev, "resume work completed\n");
760 761 762 763 764 765 766 767 768

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

/* powers up audio subsystem after a suspend */
static int soc_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
769
	struct snd_soc_card *card = socdev->card;
770

771
	dev_dbg(socdev->dev, "scheduling resume work\n");
772

773
	if (!schedule_work(&card->deferred_resume_work))
774
		dev_err(socdev->dev, "resume work item may be lost\n");
775

F
Frank Mandarino 已提交
776 777 778 779 780 781 782 783
	return 0;
}

#else
#define soc_suspend	NULL
#define soc_resume	NULL
#endif

784
static void snd_soc_instantiate_card(struct snd_soc_card *card)
F
Frank Mandarino 已提交
785
{
786 787 788 789 790 791
	struct platform_device *pdev = container_of(card->dev,
						    struct platform_device,
						    dev);
	struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
	struct snd_soc_platform *platform;
	struct snd_soc_dai *dai;
792
	int i, found, ret, ac97;
793 794 795 796 797 798 799 800 801 802 803 804 805 806 807

	if (card->instantiated)
		return;

	found = 0;
	list_for_each_entry(platform, &platform_list, list)
		if (card->platform == platform) {
			found = 1;
			break;
		}
	if (!found) {
		dev_dbg(card->dev, "Platform %s not registered\n",
			card->platform->name);
		return;
	}
808

809
	ac97 = 0;
810 811 812 813 814 815 816 817 818 819 820 821
	for (i = 0; i < card->num_links; i++) {
		found = 0;
		list_for_each_entry(dai, &dai_list, list)
			if (card->dai_link[i].cpu_dai == dai) {
				found = 1;
				break;
			}
		if (!found) {
			dev_dbg(card->dev, "DAI %s not registered\n",
				card->dai_link[i].cpu_dai->name);
			return;
		}
822 823 824

		if (card->dai_link[i].cpu_dai->ac97_control)
			ac97 = 1;
M
Mark Brown 已提交
825 826
	}

827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847
	/* If we have AC97 in the system then don't wait for the
	 * codec.  This will need revisiting if we have to handle
	 * systems with mixed AC97 and non-AC97 parts.  Only check for
	 * DAIs currently; we can't do this per link since some AC97
	 * codecs have non-AC97 DAIs.
	 */
	if (!ac97)
		for (i = 0; i < card->num_links; i++) {
			found = 0;
			list_for_each_entry(dai, &dai_list, list)
				if (card->dai_link[i].codec_dai == dai) {
					found = 1;
					break;
				}
			if (!found) {
				dev_dbg(card->dev, "DAI %s not registered\n",
					card->dai_link[i].codec_dai->name);
				return;
			}
		}

848 849 850 851 852
	/* Note that we do not current check for codec components */

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

	/* Found everything, bring it up */
853 854
	if (card->probe) {
		ret = card->probe(pdev);
855
		if (ret < 0)
856
			return;
F
Frank Mandarino 已提交
857 858
	}

859 860
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
F
Frank Mandarino 已提交
861
		if (cpu_dai->probe) {
862
			ret = cpu_dai->probe(pdev, cpu_dai);
863
			if (ret < 0)
F
Frank Mandarino 已提交
864 865 866 867 868 869
				goto cpu_dai_err;
		}
	}

	if (codec_dev->probe) {
		ret = codec_dev->probe(pdev);
870
		if (ret < 0)
F
Frank Mandarino 已提交
871 872 873 874 875
			goto cpu_dai_err;
	}

	if (platform->probe) {
		ret = platform->probe(pdev);
876
		if (ret < 0)
F
Frank Mandarino 已提交
877 878 879 880
			goto platform_err;
	}

	/* DAPM stream work */
881
	INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
R
Randy Dunlap 已提交
882
#ifdef CONFIG_PM
883
	/* deferred resume work */
884
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
R
Randy Dunlap 已提交
885
#endif
886

887 888 889
	card->instantiated = 1;

	return;
F
Frank Mandarino 已提交
890 891 892 893 894 895

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

cpu_dai_err:
896
	for (i--; i >= 0; i--) {
897
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
F
Frank Mandarino 已提交
898
		if (cpu_dai->remove)
899
			cpu_dai->remove(pdev, cpu_dai);
F
Frank Mandarino 已提交
900 901
	}

902 903
	if (card->remove)
		card->remove(pdev);
904
}
F
Frank Mandarino 已提交
905

906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935
/*
 * Attempt to initialise any uninitalised cards.  Must be called with
 * client_mutex.
 */
static void snd_soc_instantiate_cards(void)
{
	struct snd_soc_card *card;
	list_for_each_entry(card, &card_list, list)
		snd_soc_instantiate_card(card);
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
	int ret = 0;
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_card *card = socdev->card;

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

	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
	ret = snd_soc_register_card(card);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to register card\n");
		return ret;
	}

	return 0;
F
Frank Mandarino 已提交
936 937 938 939 940 941 942
}

/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
	int i;
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
943
	struct snd_soc_card *card = socdev->card;
944
	struct snd_soc_platform *platform = card->platform;
F
Frank Mandarino 已提交
945 946
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;

947
	run_delayed_work(&card->delayed_work);
948

F
Frank Mandarino 已提交
949 950 951 952 953 954
	if (platform->remove)
		platform->remove(pdev);

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

955 956
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
F
Frank Mandarino 已提交
957
		if (cpu_dai->remove)
958
			cpu_dai->remove(pdev, cpu_dai);
F
Frank Mandarino 已提交
959 960
	}

961 962
	if (card->remove)
		card->remove(pdev);
F
Frank Mandarino 已提交
963

M
Mark Brown 已提交
964 965
	snd_soc_unregister_card(card);

F
Frank Mandarino 已提交
966 967 968 969 970 971 972
	return 0;
}

/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
973
		.owner		= THIS_MODULE,
F
Frank Mandarino 已提交
974 975 976 977 978 979 980 981 982 983 984 985
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
	.suspend	= soc_suspend,
	.resume		= soc_resume,
};

/* create a new pcm */
static int soc_new_pcm(struct snd_soc_device *socdev,
	struct snd_soc_dai_link *dai_link, int num)
{
	struct snd_soc_codec *codec = socdev->codec;
986 987
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
988 989
	struct snd_soc_dai *codec_dai = dai_link->codec_dai;
	struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
F
Frank Mandarino 已提交
990 991 992 993 994 995 996 997
	struct snd_soc_pcm_runtime *rtd;
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
	if (rtd == NULL)
		return -ENOMEM;
998 999

	rtd->dai = dai_link;
F
Frank Mandarino 已提交
1000
	rtd->socdev = socdev;
1001
	codec_dai->codec = socdev->codec;
F
Frank Mandarino 已提交
1002 1003

	/* check client and interface hw capabilities */
M
Mark Brown 已提交
1004 1005
	sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
		num);
F
Frank Mandarino 已提交
1006 1007 1008 1009 1010 1011 1012 1013 1014

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

	ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
		capture, &pcm);
	if (ret < 0) {
1015 1016
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
			codec->name);
F
Frank Mandarino 已提交
1017 1018 1019 1020
		kfree(rtd);
		return ret;
	}

1021
	dai_link->pcm = pcm;
F
Frank Mandarino 已提交
1022
	pcm->private_data = rtd;
1023 1024 1025 1026 1027 1028 1029
	soc_pcm_ops.mmap = platform->pcm_ops->mmap;
	soc_pcm_ops.pointer = platform->pcm_ops->pointer;
	soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
	soc_pcm_ops.copy = platform->pcm_ops->copy;
	soc_pcm_ops.silence = platform->pcm_ops->silence;
	soc_pcm_ops.ack = platform->pcm_ops->ack;
	soc_pcm_ops.page = platform->pcm_ops->page;
F
Frank Mandarino 已提交
1030 1031 1032 1033 1034 1035 1036

	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);

1037
	ret = platform->pcm_new(codec->card, codec_dai, pcm);
F
Frank Mandarino 已提交
1038 1039 1040 1041 1042 1043
	if (ret < 0) {
		printk(KERN_ERR "asoc: platform pcm constructor failed\n");
		kfree(rtd);
		return ret;
	}

1044
	pcm->private_free = platform->pcm_free;
F
Frank Mandarino 已提交
1045 1046 1047 1048 1049 1050
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

/* codec register dump */
1051
static ssize_t soc_codec_reg_show(struct snd_soc_device *devdata, char *buf)
F
Frank Mandarino 已提交
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
{
	struct snd_soc_codec *codec = devdata->codec;
	int i, step = 1, count = 0;

	if (!codec->reg_cache_size)
		return 0;

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

	count += sprintf(buf, "%s registers\n", codec->name);
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
	for (i = 0; i < codec->reg_cache_size; i += step) {
		count += sprintf(buf + count, "%2x: ", i);
		if (count >= PAGE_SIZE - 1)
			break;

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

		if (count >= PAGE_SIZE - 1)
			break;

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

	/* Truncate count; min() would cause a warning */
	if (count >= PAGE_SIZE)
		count = PAGE_SIZE - 1;
F
Frank Mandarino 已提交
1086 1087 1088

	return count;
}
1089 1090 1091 1092 1093 1094 1095
static ssize_t codec_reg_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct snd_soc_device *devdata = dev_get_drvdata(dev);
	return soc_codec_reg_show(devdata, buf);
}

F
Frank Mandarino 已提交
1096 1097
static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);

1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108
#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;
1109 1110 1111
	struct snd_soc_codec *codec = file->private_data;
	struct device *card_dev = codec->card->dev;
	struct snd_soc_device *devdata = card_dev->driver_data;
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	ret = soc_codec_reg_show(devdata, 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;
1130
	struct snd_soc_codec *codec = file->private_data;
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158

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

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

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

static const struct file_operations codec_reg_fops = {
	.open = codec_reg_open_file,
	.read = codec_reg_read_file,
	.write = codec_reg_write_file,
};

1159
static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1160
{
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
						 debugfs_root, codec,
						 &codec_reg_fops);
	if (!codec->debugfs_reg)
		printk(KERN_WARNING
		       "ASoC: Failed to create codec register debugfs file\n");

	codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
						     debugfs_root,
						     &codec->pop_time);
	if (!codec->debugfs_pop_time)
		printk(KERN_WARNING
		       "Failed to create pop time debugfs file\n");
1174 1175
}

1176
static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1177
{
1178 1179
	debugfs_remove(codec->debugfs_pop_time);
	debugfs_remove(codec->debugfs_reg);
1180 1181 1182 1183
}

#else

1184
static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1185 1186 1187
{
}

1188
static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1189 1190 1191 1192
{
}
#endif

F
Frank Mandarino 已提交
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307
/**
 * snd_soc_new_ac97_codec - initailise AC97 device
 * @codec: audio codec
 * @ops: AC97 bus operations
 * @num: AC97 codec number
 *
 * Initialises AC97 codec resources for use by ad-hoc devices only.
 */
int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
	struct snd_ac97_bus_ops *ops, int num)
{
	mutex_lock(&codec->mutex);

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

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

	codec->ac97->bus->ops = ops;
	codec->ac97->num = num;
	mutex_unlock(&codec->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);

/**
 * snd_soc_free_ac97_codec - free AC97 codec device
 * @codec: audio codec
 *
 * Frees AC97 codec device resources.
 */
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&codec->mutex);
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
 * Returns 1 for change else 0.
 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
				unsigned short mask, unsigned short value)
{
	int change;
	unsigned short old, new;

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

	mutex_unlock(&io_mutex);
	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);

/**
 * 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,
				unsigned short mask, unsigned short value)
{
	int change;
	unsigned short old, new;

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

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

/**
 * snd_soc_new_pcms - create new sound card and pcms
 * @socdev: the SoC audio device
 *
 * Create a new sound card based upon the codec and interface pcms.
 *
 * Returns 0 for success, else error.
 */
1308
int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
F
Frank Mandarino 已提交
1309 1310
{
	struct snd_soc_codec *codec = socdev->codec;
1311
	struct snd_soc_card *card = socdev->card;
F
Frank Mandarino 已提交
1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329
	int ret = 0, i;

	mutex_lock(&codec->mutex);

	/* register a sound card */
	codec->card = snd_card_new(idx, xid, codec->owner, 0);
	if (!codec->card) {
		printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
			codec->name);
		mutex_unlock(&codec->mutex);
		return -ENODEV;
	}

	codec->card->dev = socdev->dev;
	codec->card->private_data = codec;
	strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));

	/* create the pcms */
1330 1331
	for (i = 0; i < card->num_links; i++) {
		ret = soc_new_pcm(socdev, &card->dai_link[i], i);
F
Frank Mandarino 已提交
1332 1333
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't create pcm %s\n",
1334
				card->dai_link[i].stream_name);
F
Frank Mandarino 已提交
1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345
			mutex_unlock(&codec->mutex);
			return ret;
		}
	}

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

/**
1346
 * snd_soc_init_card - register sound card
F
Frank Mandarino 已提交
1347 1348 1349 1350 1351 1352 1353
 * @socdev: the SoC audio device
 *
 * Register a SoC sound card. Also registers an AC97 device if the
 * codec is AC97 for ad hoc devices.
 *
 * Returns 0 for success, else error.
 */
1354
int snd_soc_init_card(struct snd_soc_device *socdev)
F
Frank Mandarino 已提交
1355 1356
{
	struct snd_soc_codec *codec = socdev->codec;
1357
	struct snd_soc_card *card = socdev->card;
1358
	int ret = 0, i, ac97 = 0, err = 0;
F
Frank Mandarino 已提交
1359

1360 1361 1362
	for (i = 0; i < card->num_links; i++) {
		if (card->dai_link[i].init) {
			err = card->dai_link[i].init(codec);
1363 1364
			if (err < 0) {
				printk(KERN_ERR "asoc: failed to init %s\n",
1365
					card->dai_link[i].stream_name);
1366 1367 1368
				continue;
			}
		}
M
Mark Brown 已提交
1369
		if (card->dai_link[i].codec_dai->ac97_control)
F
Frank Mandarino 已提交
1370 1371 1372
			ac97 = 1;
	}
	snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1373
		 "%s",  card->name);
F
Frank Mandarino 已提交
1374
	snprintf(codec->card->longname, sizeof(codec->card->longname),
1375
		 "%s (%s)", card->name, codec->name);
F
Frank Mandarino 已提交
1376 1377 1378

	ret = snd_card_register(codec->card);
	if (ret < 0) {
1379
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
F
Frank Mandarino 已提交
1380
				codec->name);
1381
		goto out;
F
Frank Mandarino 已提交
1382 1383
	}

1384
	mutex_lock(&codec->mutex);
F
Frank Mandarino 已提交
1385
#ifdef CONFIG_SND_SOC_AC97_BUS
1386 1387 1388 1389 1390
	if (ac97) {
		ret = soc_ac97_dev_register(codec);
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
			snd_card_free(codec->card);
1391
			mutex_unlock(&codec->mutex);
1392 1393 1394
			goto out;
		}
	}
F
Frank Mandarino 已提交
1395 1396
#endif

1397 1398 1399 1400 1401 1402
	err = snd_soc_dapm_sys_add(socdev->dev);
	if (err < 0)
		printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");

	err = device_create_file(socdev->dev, &dev_attr_codec_reg);
	if (err < 0)
1403
		printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1404

1405
	soc_init_codec_debugfs(socdev->codec);
F
Frank Mandarino 已提交
1406
	mutex_unlock(&codec->mutex);
1407 1408

out:
F
Frank Mandarino 已提交
1409 1410
	return ret;
}
1411
EXPORT_SYMBOL_GPL(snd_soc_init_card);
F
Frank Mandarino 已提交
1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422

/**
 * snd_soc_free_pcms - free sound card and pcms
 * @socdev: the SoC audio device
 *
 * Frees sound card and pcms associated with the socdev.
 * Also unregister the codec if it is an AC97 device.
 */
void snd_soc_free_pcms(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->codec;
1423
#ifdef CONFIG_SND_SOC_AC97_BUS
1424
	struct snd_soc_dai *codec_dai;
1425 1426
	int i;
#endif
F
Frank Mandarino 已提交
1427 1428

	mutex_lock(&codec->mutex);
1429
	soc_cleanup_codec_debugfs(socdev->codec);
F
Frank Mandarino 已提交
1430
#ifdef CONFIG_SND_SOC_AC97_BUS
1431
	for (i = 0; i < codec->num_dai; i++) {
1432
		codec_dai = &codec->dai[i];
M
Mark Brown 已提交
1433
		if (codec_dai->ac97_control && codec->ac97) {
1434 1435 1436 1437 1438
			soc_ac97_dev_unregister(codec);
			goto free_card;
		}
	}
free_card:
F
Frank Mandarino 已提交
1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511
#endif

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

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

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
 * @lnng_name: control long name
 *
 * 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);

/**
 * 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;
1512
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1513

1514 1515
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537
	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
 * @uinfo: control element information
 *
 * 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;
	unsigned short val, bitmask;

1538
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1539 1540
		;
	val = snd_soc_read(codec, e->reg);
1541 1542
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
F
Frank Mandarino 已提交
1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567
	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
 * @uinfo: control element information
 *
 * 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;
	unsigned short val;
	unsigned short mask, bitmask;

1568
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1569
		;
1570
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
1571 1572 1573 1574
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
1575
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
Frank Mandarino 已提交
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

	return snd_soc_update_bits(codec, e->reg, mask, val);
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

/**
 * 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;
1602
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1603

1604 1605
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623
	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
1624 1625 1626 1627 1628 1629
	int max = kcontrol->private_value;

	if (max == 1)
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
1630 1631 1632

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1633
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649
	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)
{
1650 1651 1652
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
1653
	unsigned int shift = mc->shift;
1654
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
1655

P
Philipp Zabel 已提交
1656 1657 1658 1659 1660
	if (max == 1)
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
Frank Mandarino 已提交
1661 1662
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1663
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);

/**
 * snd_soc_get_volsw - single mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * 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)
{
1680 1681
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
1682
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1683 1684 1685
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
1686
	int max = mc->max;
1687 1688
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
1689 1690 1691 1692 1693 1694 1695 1696

	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
1697
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
1698 1699
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
1700
				max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);

/**
 * snd_soc_put_volsw - single mixer put callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * 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)
{
1719 1720
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
1721
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1722 1723 1724
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
1725
	int max = mc->max;
1726 1727
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
1728 1729 1730 1731
	unsigned short val, val2, val_mask;

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
1732
		val = max - val;
F
Frank Mandarino 已提交
1733 1734 1735 1736 1737
	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
1738
			val2 = max - val2;
F
Frank Mandarino 已提交
1739 1740 1741
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
P
Philipp Zabel 已提交
1742
	return snd_soc_update_bits(codec, reg, val_mask, val);
F
Frank Mandarino 已提交
1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758
}
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)
{
1759 1760 1761
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
P
Philipp Zabel 已提交
1762 1763 1764 1765 1766

	if (max == 1)
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
1767 1768 1769

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
1770
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);

/**
 * snd_soc_get_volsw_2r - double mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * 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)
{
1787 1788
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
1789
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1790 1791 1792
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
1793
	int max = mc->max;
1794 1795
	unsigned int mask = (1<<fls(max))-1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
1796 1797 1798 1799 1800 1801 1802

	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
1803
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
1804
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
1805
			max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);

/**
 * snd_soc_put_volsw_2r - double mixer set callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * 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)
{
1824 1825
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
1826
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1827 1828 1829
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
1830
	int max = mc->max;
1831 1832
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
1833 1834 1835 1836 1837 1838 1839 1840
	int err;
	unsigned short val, val2, val_mask;

	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
1841 1842
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
1843 1844 1845 1846 1847
	}

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

1848 1849
	err = snd_soc_update_bits(codec, reg, val_mask, val);
	if (err < 0)
F
Frank Mandarino 已提交
1850 1851 1852 1853 1854 1855 1856
		return err;

	err = snd_soc_update_bits(codec, reg2, val_mask, val2);
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868
/**
 * 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)
{
1869 1870 1871 1872
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;
1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893

	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = max-min;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);

/**
 * snd_soc_get_volsw_s8 - signed mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * 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)
{
1894 1895
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
1896
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1897
	unsigned int reg = mc->reg;
1898
	int min = mc->min;
1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920
	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
 * @uinfo: control element information
 *
 * 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)
{
1921 1922
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
1923
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1924
	unsigned int reg = mc->reg;
1925
	int min = mc->min;
1926 1927 1928 1929 1930 1931 1932 1933 1934
	unsigned short val;

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

	return snd_soc_update_bits(codec, reg, 0xffff, val);
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
/**
 * 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)
{
1947 1948
	if (dai->ops.set_sysclk)
		return dai->ops.set_sysclk(dai, clk_id, freq, dir);
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
 * @clk_id: DAI specific clock divider ID
 * @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)
{
1967 1968
	if (dai->ops.set_clkdiv)
		return dai->ops.set_clkdiv(dai, div_id, div);
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
	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
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
	int pll_id, unsigned int freq_in, unsigned int freq_out)
{
1986 1987
	if (dai->ops.set_pll)
		return dai->ops.set_pll(dai, pll_id, freq_in, freq_out);
1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
	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)
{
2002 2003
	if (dai->ops.set_fmt)
		return dai->ops.set_fmt(dai, fmt);
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
 * @mask: DAI specific mask representing used slots.
 * @slots: Number of slots in use.
 *
 * 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,
	unsigned int mask, int slots)
{
2021 2022
	if (dai->ops.set_sysclk)
		return dai->ops.set_tdm_slot(dai, mask, slots);
2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

/**
 * 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)
{
2037 2038
	if (dai->ops.set_sysclk)
		return dai->ops.set_tristate(dai, tristate);
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052
	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)
{
2053 2054
	if (dai->ops.digital_mute)
		return dai->ops.digital_mute(dai, mute);
2055 2056 2057 2058 2059
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
 * @param card Card to register
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_register_card(struct snd_soc_card *card)
{
	if (!card->name || !card->dev)
		return -EINVAL;

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

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
2079
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106
	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
 *
 * @param card Card to unregister
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_unregister_card(struct snd_soc_card *card)
{
	mutex_lock(&client_mutex);
	list_del(&card->list);
	mutex_unlock(&client_mutex);

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

	return 0;
}

M
Mark Brown 已提交
2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
 * @param dai DAI to register
 */
int snd_soc_register_dai(struct snd_soc_dai *dai)
{
	if (!dai->name)
		return -EINVAL;

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

	INIT_LIST_HEAD(&dai->list);

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
2125
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 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 2181 2182 2183 2184 2185 2186 2187 2188 2189
	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
 *
 * @param dai DAI to unregister
 */
void snd_soc_unregister_dai(struct snd_soc_dai *dai)
{
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

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

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
 * @param dai Array of DAIs to register
 * @param count Number of DAIs
 */
int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
{
	int i, ret;

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

	return 0;

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

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dais);

/**
 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
 *
 * @param dai Array of DAIs to unregister
 * @param count Number of DAIs
 */
void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
{
	int i;

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

M
Mark Brown 已提交
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
 * @param platform platform to register
 */
int snd_soc_register_platform(struct snd_soc_platform *platform)
{
	if (!platform->name)
		return -EINVAL;

	INIT_LIST_HEAD(&platform->list);

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
2204
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227
	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
 *
 * @param platform platform to unregister
 */
void snd_soc_unregister_platform(struct snd_soc_platform *platform)
{
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

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

M
Mark Brown 已提交
2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
 * @param codec codec to register
 */
int snd_soc_register_codec(struct snd_soc_codec *codec)
{
	if (!codec->name)
		return -EINVAL;

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

	INIT_LIST_HEAD(&codec->list);

	mutex_lock(&client_mutex);
	list_add(&codec->list, &codec_list);
	snd_soc_instantiate_cards();
	mutex_unlock(&client_mutex);

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

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
 * @param codec codec to unregister
 */
void snd_soc_unregister_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

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

2270
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
2271
{
2272 2273 2274 2275 2276 2277 2278 2279 2280
#ifdef CONFIG_DEBUG_FS
	debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(debugfs_root) || !debugfs_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create debugfs directory\n");
		debugfs_root = NULL;
	}
#endif

F
Frank Mandarino 已提交
2281 2282 2283
	return platform_driver_register(&soc_driver);
}

M
Mark Brown 已提交
2284
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
2285
{
2286 2287 2288
#ifdef CONFIG_DEBUG_FS
	debugfs_remove_recursive(debugfs_root);
#endif
2289
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
2290 2291 2292 2293 2294 2295
}

module_init(snd_soc_init);
module_exit(snd_soc_exit);

/* Module information */
2296
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
2297 2298
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
2299
MODULE_ALIAS("platform:soc-audio");