| 1 | /* |
| 2 | * soc-core.c -- ALSA SoC Audio Layer |
| 3 | * |
| 4 | * Copyright 2005 Wolfson Microelectronics PLC. |
| 5 | * Copyright 2005 Openedhand Ltd. |
| 6 | * |
| 7 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
| 8 | * with code, comments and ideas from :- |
| 9 | * Richard Purdie <richard@openedhand.com> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify it |
| 12 | * under the terms of the GNU General Public License as published by the |
| 13 | * Free Software Foundation; either version 2 of the License, or (at your |
| 14 | * option) any later version. |
| 15 | * |
| 16 | * TODO: |
| 17 | * o Add hw rules to enforce rates, etc. |
| 18 | * o More testing with other codecs/machines. |
| 19 | * o Add more codecs and platforms to ensure good API coverage. |
| 20 | * o Support TDM on PCM and I2S |
| 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/moduleparam.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/pm.h> |
| 28 | #include <linux/bitops.h> |
| 29 | #include <linux/debugfs.h> |
| 30 | #include <linux/platform_device.h> |
| 31 | #include <sound/core.h> |
| 32 | #include <sound/pcm.h> |
| 33 | #include <sound/pcm_params.h> |
| 34 | #include <sound/soc.h> |
| 35 | #include <sound/soc-dapm.h> |
| 36 | #include <sound/initval.h> |
| 37 | |
| 38 | static DEFINE_MUTEX(pcm_mutex); |
| 39 | static DEFINE_MUTEX(io_mutex); |
| 40 | static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq); |
| 41 | |
| 42 | #ifdef CONFIG_DEBUG_FS |
| 43 | static struct dentry *debugfs_root; |
| 44 | #endif |
| 45 | |
| 46 | static DEFINE_MUTEX(client_mutex); |
| 47 | static LIST_HEAD(card_list); |
| 48 | static LIST_HEAD(dai_list); |
| 49 | static LIST_HEAD(platform_list); |
| 50 | static LIST_HEAD(codec_list); |
| 51 | |
| 52 | static int snd_soc_register_card(struct snd_soc_card *card); |
| 53 | static int snd_soc_unregister_card(struct snd_soc_card *card); |
| 54 | |
| 55 | /* |
| 56 | * This is a timeout to do a DAPM powerdown after a stream is closed(). |
| 57 | * It can be used to eliminate pops between different playback streams, e.g. |
| 58 | * between two audio tracks. |
| 59 | */ |
| 60 | static int pmdown_time = 5000; |
| 61 | module_param(pmdown_time, int, 0); |
| 62 | MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)"); |
| 63 | |
| 64 | /* |
| 65 | * This function forces any delayed work to be queued and run. |
| 66 | */ |
| 67 | static int run_delayed_work(struct delayed_work *dwork) |
| 68 | { |
| 69 | int ret; |
| 70 | |
| 71 | /* cancel any work waiting to be queued. */ |
| 72 | ret = cancel_delayed_work(dwork); |
| 73 | |
| 74 | /* if there was any work waiting then we run it now and |
| 75 | * wait for it's completion */ |
| 76 | if (ret) { |
| 77 | schedule_delayed_work(dwork, 0); |
| 78 | flush_scheduled_work(); |
| 79 | } |
| 80 | return ret; |
| 81 | } |
| 82 | |
| 83 | #ifdef CONFIG_SND_SOC_AC97_BUS |
| 84 | /* unregister ac97 codec */ |
| 85 | static int soc_ac97_dev_unregister(struct snd_soc_codec *codec) |
| 86 | { |
| 87 | if (codec->ac97->dev.bus) |
| 88 | device_unregister(&codec->ac97->dev); |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | /* stop no dev release warning */ |
| 93 | static void soc_ac97_device_release(struct device *dev){} |
| 94 | |
| 95 | /* register ac97 codec to bus */ |
| 96 | static int soc_ac97_dev_register(struct snd_soc_codec *codec) |
| 97 | { |
| 98 | int err; |
| 99 | |
| 100 | codec->ac97->dev.bus = &ac97_bus_type; |
| 101 | codec->ac97->dev.parent = codec->card->dev; |
| 102 | codec->ac97->dev.release = soc_ac97_device_release; |
| 103 | |
| 104 | dev_set_name(&codec->ac97->dev, "%d-%d:%s", |
| 105 | codec->card->number, 0, codec->name); |
| 106 | err = device_register(&codec->ac97->dev); |
| 107 | if (err < 0) { |
| 108 | snd_printk(KERN_ERR "Can't register ac97 bus\n"); |
| 109 | codec->ac97->dev.bus = NULL; |
| 110 | return err; |
| 111 | } |
| 112 | return 0; |
| 113 | } |
| 114 | #endif |
| 115 | |
| 116 | static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream) |
| 117 | { |
| 118 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 119 | struct snd_soc_device *socdev = rtd->socdev; |
| 120 | struct snd_soc_card *card = socdev->card; |
| 121 | struct snd_soc_dai_link *machine = rtd->dai; |
| 122 | struct snd_soc_dai *cpu_dai = machine->cpu_dai; |
| 123 | struct snd_soc_dai *codec_dai = machine->codec_dai; |
| 124 | int ret; |
| 125 | |
| 126 | if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates || |
| 127 | machine->symmetric_rates) { |
| 128 | dev_dbg(card->dev, "Symmetry forces %dHz rate\n", |
| 129 | machine->rate); |
| 130 | |
| 131 | ret = snd_pcm_hw_constraint_minmax(substream->runtime, |
| 132 | SNDRV_PCM_HW_PARAM_RATE, |
| 133 | machine->rate, |
| 134 | machine->rate); |
| 135 | if (ret < 0) { |
| 136 | dev_err(card->dev, |
| 137 | "Unable to apply rate symmetry constraint: %d\n", ret); |
| 138 | return ret; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * Called by ALSA when a PCM substream is opened, the runtime->hw record is |
| 147 | * then initialized and any private data can be allocated. This also calls |
| 148 | * startup for the cpu DAI, platform, machine and codec DAI. |
| 149 | */ |
| 150 | static int soc_pcm_open(struct snd_pcm_substream *substream) |
| 151 | { |
| 152 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 153 | struct snd_soc_device *socdev = rtd->socdev; |
| 154 | struct snd_soc_card *card = socdev->card; |
| 155 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 156 | struct snd_soc_dai_link *machine = rtd->dai; |
| 157 | struct snd_soc_platform *platform = card->platform; |
| 158 | struct snd_soc_dai *cpu_dai = machine->cpu_dai; |
| 159 | struct snd_soc_dai *codec_dai = machine->codec_dai; |
| 160 | int ret = 0; |
| 161 | |
| 162 | mutex_lock(&pcm_mutex); |
| 163 | |
| 164 | /* startup the audio subsystem */ |
| 165 | if (cpu_dai->ops->startup) { |
| 166 | ret = cpu_dai->ops->startup(substream, cpu_dai); |
| 167 | if (ret < 0) { |
| 168 | printk(KERN_ERR "asoc: can't open interface %s\n", |
| 169 | cpu_dai->name); |
| 170 | goto out; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | if (platform->pcm_ops->open) { |
| 175 | ret = platform->pcm_ops->open(substream); |
| 176 | if (ret < 0) { |
| 177 | printk(KERN_ERR "asoc: can't open platform %s\n", platform->name); |
| 178 | goto platform_err; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | if (codec_dai->ops->startup) { |
| 183 | ret = codec_dai->ops->startup(substream, codec_dai); |
| 184 | if (ret < 0) { |
| 185 | printk(KERN_ERR "asoc: can't open codec %s\n", |
| 186 | codec_dai->name); |
| 187 | goto codec_dai_err; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | if (machine->ops && machine->ops->startup) { |
| 192 | ret = machine->ops->startup(substream); |
| 193 | if (ret < 0) { |
| 194 | printk(KERN_ERR "asoc: %s startup failed\n", machine->name); |
| 195 | goto machine_err; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | /* Check that the codec and cpu DAI's are compatible */ |
| 200 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 201 | runtime->hw.rate_min = |
| 202 | max(codec_dai->playback.rate_min, |
| 203 | cpu_dai->playback.rate_min); |
| 204 | runtime->hw.rate_max = |
| 205 | min(codec_dai->playback.rate_max, |
| 206 | cpu_dai->playback.rate_max); |
| 207 | runtime->hw.channels_min = |
| 208 | max(codec_dai->playback.channels_min, |
| 209 | cpu_dai->playback.channels_min); |
| 210 | runtime->hw.channels_max = |
| 211 | min(codec_dai->playback.channels_max, |
| 212 | cpu_dai->playback.channels_max); |
| 213 | runtime->hw.formats = |
| 214 | codec_dai->playback.formats & cpu_dai->playback.formats; |
| 215 | runtime->hw.rates = |
| 216 | codec_dai->playback.rates & cpu_dai->playback.rates; |
| 217 | } else { |
| 218 | runtime->hw.rate_min = |
| 219 | max(codec_dai->capture.rate_min, |
| 220 | cpu_dai->capture.rate_min); |
| 221 | runtime->hw.rate_max = |
| 222 | min(codec_dai->capture.rate_max, |
| 223 | cpu_dai->capture.rate_max); |
| 224 | runtime->hw.channels_min = |
| 225 | max(codec_dai->capture.channels_min, |
| 226 | cpu_dai->capture.channels_min); |
| 227 | runtime->hw.channels_max = |
| 228 | min(codec_dai->capture.channels_max, |
| 229 | cpu_dai->capture.channels_max); |
| 230 | runtime->hw.formats = |
| 231 | codec_dai->capture.formats & cpu_dai->capture.formats; |
| 232 | runtime->hw.rates = |
| 233 | codec_dai->capture.rates & cpu_dai->capture.rates; |
| 234 | } |
| 235 | |
| 236 | snd_pcm_limit_hw_rates(runtime); |
| 237 | if (!runtime->hw.rates) { |
| 238 | printk(KERN_ERR "asoc: %s <-> %s No matching rates\n", |
| 239 | codec_dai->name, cpu_dai->name); |
| 240 | goto machine_err; |
| 241 | } |
| 242 | if (!runtime->hw.formats) { |
| 243 | printk(KERN_ERR "asoc: %s <-> %s No matching formats\n", |
| 244 | codec_dai->name, cpu_dai->name); |
| 245 | goto machine_err; |
| 246 | } |
| 247 | if (!runtime->hw.channels_min || !runtime->hw.channels_max) { |
| 248 | printk(KERN_ERR "asoc: %s <-> %s No matching channels\n", |
| 249 | codec_dai->name, cpu_dai->name); |
| 250 | goto machine_err; |
| 251 | } |
| 252 | |
| 253 | /* Symmetry only applies if we've already got an active stream. */ |
| 254 | if (cpu_dai->active || codec_dai->active) { |
| 255 | ret = soc_pcm_apply_symmetry(substream); |
| 256 | if (ret != 0) |
| 257 | goto machine_err; |
| 258 | } |
| 259 | |
| 260 | pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name); |
| 261 | pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates); |
| 262 | pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min, |
| 263 | runtime->hw.channels_max); |
| 264 | pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min, |
| 265 | runtime->hw.rate_max); |
| 266 | |
| 267 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 268 | cpu_dai->playback.active = codec_dai->playback.active = 1; |
| 269 | else |
| 270 | cpu_dai->capture.active = codec_dai->capture.active = 1; |
| 271 | cpu_dai->active = codec_dai->active = 1; |
| 272 | cpu_dai->runtime = runtime; |
| 273 | card->codec->active++; |
| 274 | mutex_unlock(&pcm_mutex); |
| 275 | return 0; |
| 276 | |
| 277 | machine_err: |
| 278 | if (machine->ops && machine->ops->shutdown) |
| 279 | machine->ops->shutdown(substream); |
| 280 | |
| 281 | codec_dai_err: |
| 282 | if (platform->pcm_ops->close) |
| 283 | platform->pcm_ops->close(substream); |
| 284 | |
| 285 | platform_err: |
| 286 | if (cpu_dai->ops->shutdown) |
| 287 | cpu_dai->ops->shutdown(substream, cpu_dai); |
| 288 | out: |
| 289 | mutex_unlock(&pcm_mutex); |
| 290 | return ret; |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * Power down the audio subsystem pmdown_time msecs after close is called. |
| 295 | * This is to ensure there are no pops or clicks in between any music tracks |
| 296 | * due to DAPM power cycling. |
| 297 | */ |
| 298 | static void close_delayed_work(struct work_struct *work) |
| 299 | { |
| 300 | struct snd_soc_card *card = container_of(work, struct snd_soc_card, |
| 301 | delayed_work.work); |
| 302 | struct snd_soc_codec *codec = card->codec; |
| 303 | struct snd_soc_dai *codec_dai; |
| 304 | int i; |
| 305 | |
| 306 | mutex_lock(&pcm_mutex); |
| 307 | for (i = 0; i < codec->num_dai; i++) { |
| 308 | codec_dai = &codec->dai[i]; |
| 309 | |
| 310 | pr_debug("pop wq checking: %s status: %s waiting: %s\n", |
| 311 | codec_dai->playback.stream_name, |
| 312 | codec_dai->playback.active ? "active" : "inactive", |
| 313 | codec_dai->pop_wait ? "yes" : "no"); |
| 314 | |
| 315 | /* are we waiting on this codec DAI stream */ |
| 316 | if (codec_dai->pop_wait == 1) { |
| 317 | codec_dai->pop_wait = 0; |
| 318 | snd_soc_dapm_stream_event(codec, |
| 319 | codec_dai->playback.stream_name, |
| 320 | SND_SOC_DAPM_STREAM_STOP); |
| 321 | } |
| 322 | } |
| 323 | mutex_unlock(&pcm_mutex); |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * Called by ALSA when a PCM substream is closed. Private data can be |
| 328 | * freed here. The cpu DAI, codec DAI, machine and platform are also |
| 329 | * shutdown. |
| 330 | */ |
| 331 | static int soc_codec_close(struct snd_pcm_substream *substream) |
| 332 | { |
| 333 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 334 | struct snd_soc_device *socdev = rtd->socdev; |
| 335 | struct snd_soc_card *card = socdev->card; |
| 336 | struct snd_soc_dai_link *machine = rtd->dai; |
| 337 | struct snd_soc_platform *platform = card->platform; |
| 338 | struct snd_soc_dai *cpu_dai = machine->cpu_dai; |
| 339 | struct snd_soc_dai *codec_dai = machine->codec_dai; |
| 340 | struct snd_soc_codec *codec = card->codec; |
| 341 | |
| 342 | mutex_lock(&pcm_mutex); |
| 343 | |
| 344 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 345 | cpu_dai->playback.active = codec_dai->playback.active = 0; |
| 346 | else |
| 347 | cpu_dai->capture.active = codec_dai->capture.active = 0; |
| 348 | |
| 349 | if (codec_dai->playback.active == 0 && |
| 350 | codec_dai->capture.active == 0) { |
| 351 | cpu_dai->active = codec_dai->active = 0; |
| 352 | } |
| 353 | codec->active--; |
| 354 | |
| 355 | /* Muting the DAC suppresses artifacts caused during digital |
| 356 | * shutdown, for example from stopping clocks. |
| 357 | */ |
| 358 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 359 | snd_soc_dai_digital_mute(codec_dai, 1); |
| 360 | |
| 361 | if (cpu_dai->ops->shutdown) |
| 362 | cpu_dai->ops->shutdown(substream, cpu_dai); |
| 363 | |
| 364 | if (codec_dai->ops->shutdown) |
| 365 | codec_dai->ops->shutdown(substream, codec_dai); |
| 366 | |
| 367 | if (machine->ops && machine->ops->shutdown) |
| 368 | machine->ops->shutdown(substream); |
| 369 | |
| 370 | if (platform->pcm_ops->close) |
| 371 | platform->pcm_ops->close(substream); |
| 372 | cpu_dai->runtime = NULL; |
| 373 | |
| 374 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 375 | /* start delayed pop wq here for playback streams */ |
| 376 | codec_dai->pop_wait = 1; |
| 377 | schedule_delayed_work(&card->delayed_work, |
| 378 | msecs_to_jiffies(pmdown_time)); |
| 379 | } else { |
| 380 | /* capture streams can be powered down now */ |
| 381 | snd_soc_dapm_stream_event(codec, |
| 382 | codec_dai->capture.stream_name, |
| 383 | SND_SOC_DAPM_STREAM_STOP); |
| 384 | } |
| 385 | |
| 386 | mutex_unlock(&pcm_mutex); |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | /* |
| 391 | * Called by ALSA when the PCM substream is prepared, can set format, sample |
| 392 | * rate, etc. This function is non atomic and can be called multiple times, |
| 393 | * it can refer to the runtime info. |
| 394 | */ |
| 395 | static int soc_pcm_prepare(struct snd_pcm_substream *substream) |
| 396 | { |
| 397 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 398 | struct snd_soc_device *socdev = rtd->socdev; |
| 399 | struct snd_soc_card *card = socdev->card; |
| 400 | struct snd_soc_dai_link *machine = rtd->dai; |
| 401 | struct snd_soc_platform *platform = card->platform; |
| 402 | struct snd_soc_dai *cpu_dai = machine->cpu_dai; |
| 403 | struct snd_soc_dai *codec_dai = machine->codec_dai; |
| 404 | struct snd_soc_codec *codec = card->codec; |
| 405 | int ret = 0; |
| 406 | |
| 407 | mutex_lock(&pcm_mutex); |
| 408 | |
| 409 | if (machine->ops && machine->ops->prepare) { |
| 410 | ret = machine->ops->prepare(substream); |
| 411 | if (ret < 0) { |
| 412 | printk(KERN_ERR "asoc: machine prepare error\n"); |
| 413 | goto out; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | if (platform->pcm_ops->prepare) { |
| 418 | ret = platform->pcm_ops->prepare(substream); |
| 419 | if (ret < 0) { |
| 420 | printk(KERN_ERR "asoc: platform prepare error\n"); |
| 421 | goto out; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | if (codec_dai->ops->prepare) { |
| 426 | ret = codec_dai->ops->prepare(substream, codec_dai); |
| 427 | if (ret < 0) { |
| 428 | printk(KERN_ERR "asoc: codec DAI prepare error\n"); |
| 429 | goto out; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | if (cpu_dai->ops->prepare) { |
| 434 | ret = cpu_dai->ops->prepare(substream, cpu_dai); |
| 435 | if (ret < 0) { |
| 436 | printk(KERN_ERR "asoc: cpu DAI prepare error\n"); |
| 437 | goto out; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | /* cancel any delayed stream shutdown that is pending */ |
| 442 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 443 | codec_dai->pop_wait) { |
| 444 | codec_dai->pop_wait = 0; |
| 445 | cancel_delayed_work(&card->delayed_work); |
| 446 | } |
| 447 | |
| 448 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 449 | snd_soc_dapm_stream_event(codec, |
| 450 | codec_dai->playback.stream_name, |
| 451 | SND_SOC_DAPM_STREAM_START); |
| 452 | else |
| 453 | snd_soc_dapm_stream_event(codec, |
| 454 | codec_dai->capture.stream_name, |
| 455 | SND_SOC_DAPM_STREAM_START); |
| 456 | |
| 457 | snd_soc_dai_digital_mute(codec_dai, 0); |
| 458 | |
| 459 | out: |
| 460 | mutex_unlock(&pcm_mutex); |
| 461 | return ret; |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * Called by ALSA when the hardware params are set by application. This |
| 466 | * function can also be called multiple times and can allocate buffers |
| 467 | * (using snd_pcm_lib_* ). It's non-atomic. |
| 468 | */ |
| 469 | static int soc_pcm_hw_params(struct snd_pcm_substream *substream, |
| 470 | struct snd_pcm_hw_params *params) |
| 471 | { |
| 472 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 473 | struct snd_soc_device *socdev = rtd->socdev; |
| 474 | struct snd_soc_dai_link *machine = rtd->dai; |
| 475 | struct snd_soc_card *card = socdev->card; |
| 476 | struct snd_soc_platform *platform = card->platform; |
| 477 | struct snd_soc_dai *cpu_dai = machine->cpu_dai; |
| 478 | struct snd_soc_dai *codec_dai = machine->codec_dai; |
| 479 | int ret = 0; |
| 480 | |
| 481 | mutex_lock(&pcm_mutex); |
| 482 | |
| 483 | if (machine->ops && machine->ops->hw_params) { |
| 484 | ret = machine->ops->hw_params(substream, params); |
| 485 | if (ret < 0) { |
| 486 | printk(KERN_ERR "asoc: machine hw_params failed\n"); |
| 487 | goto out; |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | if (codec_dai->ops->hw_params) { |
| 492 | ret = codec_dai->ops->hw_params(substream, params, codec_dai); |
| 493 | if (ret < 0) { |
| 494 | printk(KERN_ERR "asoc: can't set codec %s hw params\n", |
| 495 | codec_dai->name); |
| 496 | goto codec_err; |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | if (cpu_dai->ops->hw_params) { |
| 501 | ret = cpu_dai->ops->hw_params(substream, params, cpu_dai); |
| 502 | if (ret < 0) { |
| 503 | printk(KERN_ERR "asoc: interface %s hw params failed\n", |
| 504 | cpu_dai->name); |
| 505 | goto interface_err; |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | if (platform->pcm_ops->hw_params) { |
| 510 | ret = platform->pcm_ops->hw_params(substream, params); |
| 511 | if (ret < 0) { |
| 512 | printk(KERN_ERR "asoc: platform %s hw params failed\n", |
| 513 | platform->name); |
| 514 | goto platform_err; |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | machine->rate = params_rate(params); |
| 519 | |
| 520 | out: |
| 521 | mutex_unlock(&pcm_mutex); |
| 522 | return ret; |
| 523 | |
| 524 | platform_err: |
| 525 | if (cpu_dai->ops->hw_free) |
| 526 | cpu_dai->ops->hw_free(substream, cpu_dai); |
| 527 | |
| 528 | interface_err: |
| 529 | if (codec_dai->ops->hw_free) |
| 530 | codec_dai->ops->hw_free(substream, codec_dai); |
| 531 | |
| 532 | codec_err: |
| 533 | if (machine->ops && machine->ops->hw_free) |
| 534 | machine->ops->hw_free(substream); |
| 535 | |
| 536 | mutex_unlock(&pcm_mutex); |
| 537 | return ret; |
| 538 | } |
| 539 | |
| 540 | /* |
| 541 | * Free's resources allocated by hw_params, can be called multiple times |
| 542 | */ |
| 543 | static int soc_pcm_hw_free(struct snd_pcm_substream *substream) |
| 544 | { |
| 545 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 546 | struct snd_soc_device *socdev = rtd->socdev; |
| 547 | struct snd_soc_dai_link *machine = rtd->dai; |
| 548 | struct snd_soc_card *card = socdev->card; |
| 549 | struct snd_soc_platform *platform = card->platform; |
| 550 | struct snd_soc_dai *cpu_dai = machine->cpu_dai; |
| 551 | struct snd_soc_dai *codec_dai = machine->codec_dai; |
| 552 | struct snd_soc_codec *codec = card->codec; |
| 553 | |
| 554 | mutex_lock(&pcm_mutex); |
| 555 | |
| 556 | /* apply codec digital mute */ |
| 557 | if (!codec->active) |
| 558 | snd_soc_dai_digital_mute(codec_dai, 1); |
| 559 | |
| 560 | /* free any machine hw params */ |
| 561 | if (machine->ops && machine->ops->hw_free) |
| 562 | machine->ops->hw_free(substream); |
| 563 | |
| 564 | /* free any DMA resources */ |
| 565 | if (platform->pcm_ops->hw_free) |
| 566 | platform->pcm_ops->hw_free(substream); |
| 567 | |
| 568 | /* now free hw params for the DAI's */ |
| 569 | if (codec_dai->ops->hw_free) |
| 570 | codec_dai->ops->hw_free(substream, codec_dai); |
| 571 | |
| 572 | if (cpu_dai->ops->hw_free) |
| 573 | cpu_dai->ops->hw_free(substream, cpu_dai); |
| 574 | |
| 575 | mutex_unlock(&pcm_mutex); |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 580 | { |
| 581 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 582 | struct snd_soc_device *socdev = rtd->socdev; |
| 583 | struct snd_soc_card *card= socdev->card; |
| 584 | struct snd_soc_dai_link *machine = rtd->dai; |
| 585 | struct snd_soc_platform *platform = card->platform; |
| 586 | struct snd_soc_dai *cpu_dai = machine->cpu_dai; |
| 587 | struct snd_soc_dai *codec_dai = machine->codec_dai; |
| 588 | int ret; |
| 589 | |
| 590 | if (codec_dai->ops->trigger) { |
| 591 | ret = codec_dai->ops->trigger(substream, cmd, codec_dai); |
| 592 | if (ret < 0) |
| 593 | return ret; |
| 594 | } |
| 595 | |
| 596 | if (platform->pcm_ops->trigger) { |
| 597 | ret = platform->pcm_ops->trigger(substream, cmd); |
| 598 | if (ret < 0) |
| 599 | return ret; |
| 600 | } |
| 601 | |
| 602 | if (cpu_dai->ops->trigger) { |
| 603 | ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai); |
| 604 | if (ret < 0) |
| 605 | return ret; |
| 606 | } |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | /* ASoC PCM operations */ |
| 611 | static struct snd_pcm_ops soc_pcm_ops = { |
| 612 | .open = soc_pcm_open, |
| 613 | .close = soc_codec_close, |
| 614 | .hw_params = soc_pcm_hw_params, |
| 615 | .hw_free = soc_pcm_hw_free, |
| 616 | .prepare = soc_pcm_prepare, |
| 617 | .trigger = soc_pcm_trigger, |
| 618 | }; |
| 619 | |
| 620 | #ifdef CONFIG_PM |
| 621 | /* powers down audio subsystem for suspend */ |
| 622 | static int soc_suspend(struct platform_device *pdev, pm_message_t state) |
| 623 | { |
| 624 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 625 | struct snd_soc_card *card = socdev->card; |
| 626 | struct snd_soc_platform *platform = card->platform; |
| 627 | struct snd_soc_codec_device *codec_dev = socdev->codec_dev; |
| 628 | struct snd_soc_codec *codec = card->codec; |
| 629 | int i; |
| 630 | |
| 631 | /* If the initialization of this soc device failed, there is no codec |
| 632 | * associated with it. Just bail out in this case. |
| 633 | */ |
| 634 | if (!codec) |
| 635 | return 0; |
| 636 | |
| 637 | /* Due to the resume being scheduled into a workqueue we could |
| 638 | * suspend before that's finished - wait for it to complete. |
| 639 | */ |
| 640 | snd_power_lock(codec->card); |
| 641 | snd_power_wait(codec->card, SNDRV_CTL_POWER_D0); |
| 642 | snd_power_unlock(codec->card); |
| 643 | |
| 644 | /* we're going to block userspace touching us until resume completes */ |
| 645 | snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot); |
| 646 | |
| 647 | /* mute any active DAC's */ |
| 648 | for (i = 0; i < card->num_links; i++) { |
| 649 | struct snd_soc_dai *dai = card->dai_link[i].codec_dai; |
| 650 | if (dai->ops->digital_mute && dai->playback.active) |
| 651 | dai->ops->digital_mute(dai, 1); |
| 652 | } |
| 653 | |
| 654 | /* suspend all pcms */ |
| 655 | for (i = 0; i < card->num_links; i++) |
| 656 | snd_pcm_suspend_all(card->dai_link[i].pcm); |
| 657 | |
| 658 | if (card->suspend_pre) |
| 659 | card->suspend_pre(pdev, state); |
| 660 | |
| 661 | for (i = 0; i < card->num_links; i++) { |
| 662 | struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; |
| 663 | if (cpu_dai->suspend && !cpu_dai->ac97_control) |
| 664 | cpu_dai->suspend(cpu_dai); |
| 665 | if (platform->suspend) |
| 666 | platform->suspend(cpu_dai); |
| 667 | } |
| 668 | |
| 669 | /* close any waiting streams and save state */ |
| 670 | run_delayed_work(&card->delayed_work); |
| 671 | codec->suspend_bias_level = codec->bias_level; |
| 672 | |
| 673 | for (i = 0; i < codec->num_dai; i++) { |
| 674 | char *stream = codec->dai[i].playback.stream_name; |
| 675 | if (stream != NULL) |
| 676 | snd_soc_dapm_stream_event(codec, stream, |
| 677 | SND_SOC_DAPM_STREAM_SUSPEND); |
| 678 | stream = codec->dai[i].capture.stream_name; |
| 679 | if (stream != NULL) |
| 680 | snd_soc_dapm_stream_event(codec, stream, |
| 681 | SND_SOC_DAPM_STREAM_SUSPEND); |
| 682 | } |
| 683 | |
| 684 | if (codec_dev->suspend) |
| 685 | codec_dev->suspend(pdev, state); |
| 686 | |
| 687 | for (i = 0; i < card->num_links; i++) { |
| 688 | struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; |
| 689 | if (cpu_dai->suspend && cpu_dai->ac97_control) |
| 690 | cpu_dai->suspend(cpu_dai); |
| 691 | } |
| 692 | |
| 693 | if (card->suspend_post) |
| 694 | card->suspend_post(pdev, state); |
| 695 | |
| 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | /* deferred resume work, so resume can complete before we finished |
| 700 | * setting our codec back up, which can be very slow on I2C |
| 701 | */ |
| 702 | static void soc_resume_deferred(struct work_struct *work) |
| 703 | { |
| 704 | struct snd_soc_card *card = container_of(work, |
| 705 | struct snd_soc_card, |
| 706 | deferred_resume_work); |
| 707 | struct snd_soc_device *socdev = card->socdev; |
| 708 | struct snd_soc_platform *platform = card->platform; |
| 709 | struct snd_soc_codec_device *codec_dev = socdev->codec_dev; |
| 710 | struct snd_soc_codec *codec = card->codec; |
| 711 | struct platform_device *pdev = to_platform_device(socdev->dev); |
| 712 | int i; |
| 713 | |
| 714 | /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time, |
| 715 | * so userspace apps are blocked from touching us |
| 716 | */ |
| 717 | |
| 718 | dev_dbg(socdev->dev, "starting resume work\n"); |
| 719 | |
| 720 | if (card->resume_pre) |
| 721 | card->resume_pre(pdev); |
| 722 | |
| 723 | for (i = 0; i < card->num_links; i++) { |
| 724 | struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; |
| 725 | if (cpu_dai->resume && cpu_dai->ac97_control) |
| 726 | cpu_dai->resume(cpu_dai); |
| 727 | } |
| 728 | |
| 729 | if (codec_dev->resume) |
| 730 | codec_dev->resume(pdev); |
| 731 | |
| 732 | for (i = 0; i < codec->num_dai; i++) { |
| 733 | char *stream = codec->dai[i].playback.stream_name; |
| 734 | if (stream != NULL) |
| 735 | snd_soc_dapm_stream_event(codec, stream, |
| 736 | SND_SOC_DAPM_STREAM_RESUME); |
| 737 | stream = codec->dai[i].capture.stream_name; |
| 738 | if (stream != NULL) |
| 739 | snd_soc_dapm_stream_event(codec, stream, |
| 740 | SND_SOC_DAPM_STREAM_RESUME); |
| 741 | } |
| 742 | |
| 743 | /* unmute any active DACs */ |
| 744 | for (i = 0; i < card->num_links; i++) { |
| 745 | struct snd_soc_dai *dai = card->dai_link[i].codec_dai; |
| 746 | if (dai->ops->digital_mute && dai->playback.active) |
| 747 | dai->ops->digital_mute(dai, 0); |
| 748 | } |
| 749 | |
| 750 | for (i = 0; i < card->num_links; i++) { |
| 751 | struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; |
| 752 | if (cpu_dai->resume && !cpu_dai->ac97_control) |
| 753 | cpu_dai->resume(cpu_dai); |
| 754 | if (platform->resume) |
| 755 | platform->resume(cpu_dai); |
| 756 | } |
| 757 | |
| 758 | if (card->resume_post) |
| 759 | card->resume_post(pdev); |
| 760 | |
| 761 | dev_dbg(socdev->dev, "resume work completed\n"); |
| 762 | |
| 763 | /* userspace can access us now we are back as we were before */ |
| 764 | snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0); |
| 765 | } |
| 766 | |
| 767 | /* powers up audio subsystem after a suspend */ |
| 768 | static int soc_resume(struct platform_device *pdev) |
| 769 | { |
| 770 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 771 | struct snd_soc_card *card = socdev->card; |
| 772 | struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai; |
| 773 | |
| 774 | /* AC97 devices might have other drivers hanging off them so |
| 775 | * need to resume immediately. Other drivers don't have that |
| 776 | * problem and may take a substantial amount of time to resume |
| 777 | * due to I/O costs and anti-pop so handle them out of line. |
| 778 | */ |
| 779 | if (cpu_dai->ac97_control) { |
| 780 | dev_dbg(socdev->dev, "Resuming AC97 immediately\n"); |
| 781 | soc_resume_deferred(&card->deferred_resume_work); |
| 782 | } else { |
| 783 | dev_dbg(socdev->dev, "Scheduling resume work\n"); |
| 784 | if (!schedule_work(&card->deferred_resume_work)) |
| 785 | dev_err(socdev->dev, "resume work item may be lost\n"); |
| 786 | } |
| 787 | |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | #else |
| 792 | #define soc_suspend NULL |
| 793 | #define soc_resume NULL |
| 794 | #endif |
| 795 | |
| 796 | static void snd_soc_instantiate_card(struct snd_soc_card *card) |
| 797 | { |
| 798 | struct platform_device *pdev = container_of(card->dev, |
| 799 | struct platform_device, |
| 800 | dev); |
| 801 | struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev; |
| 802 | struct snd_soc_platform *platform; |
| 803 | struct snd_soc_dai *dai; |
| 804 | int i, found, ret, ac97; |
| 805 | |
| 806 | if (card->instantiated) |
| 807 | return; |
| 808 | |
| 809 | found = 0; |
| 810 | list_for_each_entry(platform, &platform_list, list) |
| 811 | if (card->platform == platform) { |
| 812 | found = 1; |
| 813 | break; |
| 814 | } |
| 815 | if (!found) { |
| 816 | dev_dbg(card->dev, "Platform %s not registered\n", |
| 817 | card->platform->name); |
| 818 | return; |
| 819 | } |
| 820 | |
| 821 | ac97 = 0; |
| 822 | for (i = 0; i < card->num_links; i++) { |
| 823 | found = 0; |
| 824 | list_for_each_entry(dai, &dai_list, list) |
| 825 | if (card->dai_link[i].cpu_dai == dai) { |
| 826 | found = 1; |
| 827 | break; |
| 828 | } |
| 829 | if (!found) { |
| 830 | dev_dbg(card->dev, "DAI %s not registered\n", |
| 831 | card->dai_link[i].cpu_dai->name); |
| 832 | return; |
| 833 | } |
| 834 | |
| 835 | if (card->dai_link[i].cpu_dai->ac97_control) |
| 836 | ac97 = 1; |
| 837 | } |
| 838 | |
| 839 | /* If we have AC97 in the system then don't wait for the |
| 840 | * codec. This will need revisiting if we have to handle |
| 841 | * systems with mixed AC97 and non-AC97 parts. Only check for |
| 842 | * DAIs currently; we can't do this per link since some AC97 |
| 843 | * codecs have non-AC97 DAIs. |
| 844 | */ |
| 845 | if (!ac97) |
| 846 | for (i = 0; i < card->num_links; i++) { |
| 847 | found = 0; |
| 848 | list_for_each_entry(dai, &dai_list, list) |
| 849 | if (card->dai_link[i].codec_dai == dai) { |
| 850 | found = 1; |
| 851 | break; |
| 852 | } |
| 853 | if (!found) { |
| 854 | dev_dbg(card->dev, "DAI %s not registered\n", |
| 855 | card->dai_link[i].codec_dai->name); |
| 856 | return; |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | /* Note that we do not current check for codec components */ |
| 861 | |
| 862 | dev_dbg(card->dev, "All components present, instantiating\n"); |
| 863 | |
| 864 | /* Found everything, bring it up */ |
| 865 | if (card->probe) { |
| 866 | ret = card->probe(pdev); |
| 867 | if (ret < 0) |
| 868 | return; |
| 869 | } |
| 870 | |
| 871 | for (i = 0; i < card->num_links; i++) { |
| 872 | struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; |
| 873 | if (cpu_dai->probe) { |
| 874 | ret = cpu_dai->probe(pdev, cpu_dai); |
| 875 | if (ret < 0) |
| 876 | goto cpu_dai_err; |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | if (codec_dev->probe) { |
| 881 | ret = codec_dev->probe(pdev); |
| 882 | if (ret < 0) |
| 883 | goto cpu_dai_err; |
| 884 | } |
| 885 | |
| 886 | if (platform->probe) { |
| 887 | ret = platform->probe(pdev); |
| 888 | if (ret < 0) |
| 889 | goto platform_err; |
| 890 | } |
| 891 | |
| 892 | /* DAPM stream work */ |
| 893 | INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work); |
| 894 | #ifdef CONFIG_PM |
| 895 | /* deferred resume work */ |
| 896 | INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); |
| 897 | #endif |
| 898 | |
| 899 | card->instantiated = 1; |
| 900 | |
| 901 | return; |
| 902 | |
| 903 | platform_err: |
| 904 | if (codec_dev->remove) |
| 905 | codec_dev->remove(pdev); |
| 906 | |
| 907 | cpu_dai_err: |
| 908 | for (i--; i >= 0; i--) { |
| 909 | struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; |
| 910 | if (cpu_dai->remove) |
| 911 | cpu_dai->remove(pdev, cpu_dai); |
| 912 | } |
| 913 | |
| 914 | if (card->remove) |
| 915 | card->remove(pdev); |
| 916 | } |
| 917 | |
| 918 | /* |
| 919 | * Attempt to initialise any uninitalised cards. Must be called with |
| 920 | * client_mutex. |
| 921 | */ |
| 922 | static void snd_soc_instantiate_cards(void) |
| 923 | { |
| 924 | struct snd_soc_card *card; |
| 925 | list_for_each_entry(card, &card_list, list) |
| 926 | snd_soc_instantiate_card(card); |
| 927 | } |
| 928 | |
| 929 | /* probes a new socdev */ |
| 930 | static int soc_probe(struct platform_device *pdev) |
| 931 | { |
| 932 | int ret = 0; |
| 933 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 934 | struct snd_soc_card *card = socdev->card; |
| 935 | |
| 936 | /* Bodge while we push things out of socdev */ |
| 937 | card->socdev = socdev; |
| 938 | |
| 939 | /* Bodge while we unpick instantiation */ |
| 940 | card->dev = &pdev->dev; |
| 941 | ret = snd_soc_register_card(card); |
| 942 | if (ret != 0) { |
| 943 | dev_err(&pdev->dev, "Failed to register card\n"); |
| 944 | return ret; |
| 945 | } |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | /* removes a socdev */ |
| 951 | static int soc_remove(struct platform_device *pdev) |
| 952 | { |
| 953 | int i; |
| 954 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 955 | struct snd_soc_card *card = socdev->card; |
| 956 | struct snd_soc_platform *platform = card->platform; |
| 957 | struct snd_soc_codec_device *codec_dev = socdev->codec_dev; |
| 958 | |
| 959 | if (!card->instantiated) |
| 960 | return 0; |
| 961 | |
| 962 | run_delayed_work(&card->delayed_work); |
| 963 | |
| 964 | if (platform->remove) |
| 965 | platform->remove(pdev); |
| 966 | |
| 967 | if (codec_dev->remove) |
| 968 | codec_dev->remove(pdev); |
| 969 | |
| 970 | for (i = 0; i < card->num_links; i++) { |
| 971 | struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai; |
| 972 | if (cpu_dai->remove) |
| 973 | cpu_dai->remove(pdev, cpu_dai); |
| 974 | } |
| 975 | |
| 976 | if (card->remove) |
| 977 | card->remove(pdev); |
| 978 | |
| 979 | snd_soc_unregister_card(card); |
| 980 | |
| 981 | return 0; |
| 982 | } |
| 983 | |
| 984 | /* ASoC platform driver */ |
| 985 | static struct platform_driver soc_driver = { |
| 986 | .driver = { |
| 987 | .name = "soc-audio", |
| 988 | .owner = THIS_MODULE, |
| 989 | }, |
| 990 | .probe = soc_probe, |
| 991 | .remove = soc_remove, |
| 992 | .suspend = soc_suspend, |
| 993 | .resume = soc_resume, |
| 994 | }; |
| 995 | |
| 996 | /* create a new pcm */ |
| 997 | static int soc_new_pcm(struct snd_soc_device *socdev, |
| 998 | struct snd_soc_dai_link *dai_link, int num) |
| 999 | { |
| 1000 | struct snd_soc_card *card = socdev->card; |
| 1001 | struct snd_soc_codec *codec = card->codec; |
| 1002 | struct snd_soc_platform *platform = card->platform; |
| 1003 | struct snd_soc_dai *codec_dai = dai_link->codec_dai; |
| 1004 | struct snd_soc_dai *cpu_dai = dai_link->cpu_dai; |
| 1005 | struct snd_soc_pcm_runtime *rtd; |
| 1006 | struct snd_pcm *pcm; |
| 1007 | char new_name[64]; |
| 1008 | int ret = 0, playback = 0, capture = 0; |
| 1009 | |
| 1010 | rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL); |
| 1011 | if (rtd == NULL) |
| 1012 | return -ENOMEM; |
| 1013 | |
| 1014 | rtd->dai = dai_link; |
| 1015 | rtd->socdev = socdev; |
| 1016 | codec_dai->codec = card->codec; |
| 1017 | |
| 1018 | /* check client and interface hw capabilities */ |
| 1019 | sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name, |
| 1020 | num); |
| 1021 | |
| 1022 | if (codec_dai->playback.channels_min) |
| 1023 | playback = 1; |
| 1024 | if (codec_dai->capture.channels_min) |
| 1025 | capture = 1; |
| 1026 | |
| 1027 | ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback, |
| 1028 | capture, &pcm); |
| 1029 | if (ret < 0) { |
| 1030 | printk(KERN_ERR "asoc: can't create pcm for codec %s\n", |
| 1031 | codec->name); |
| 1032 | kfree(rtd); |
| 1033 | return ret; |
| 1034 | } |
| 1035 | |
| 1036 | dai_link->pcm = pcm; |
| 1037 | pcm->private_data = rtd; |
| 1038 | soc_pcm_ops.mmap = platform->pcm_ops->mmap; |
| 1039 | soc_pcm_ops.pointer = platform->pcm_ops->pointer; |
| 1040 | soc_pcm_ops.ioctl = platform->pcm_ops->ioctl; |
| 1041 | soc_pcm_ops.copy = platform->pcm_ops->copy; |
| 1042 | soc_pcm_ops.silence = platform->pcm_ops->silence; |
| 1043 | soc_pcm_ops.ack = platform->pcm_ops->ack; |
| 1044 | soc_pcm_ops.page = platform->pcm_ops->page; |
| 1045 | |
| 1046 | if (playback) |
| 1047 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops); |
| 1048 | |
| 1049 | if (capture) |
| 1050 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops); |
| 1051 | |
| 1052 | ret = platform->pcm_new(codec->card, codec_dai, pcm); |
| 1053 | if (ret < 0) { |
| 1054 | printk(KERN_ERR "asoc: platform pcm constructor failed\n"); |
| 1055 | kfree(rtd); |
| 1056 | return ret; |
| 1057 | } |
| 1058 | |
| 1059 | pcm->private_free = platform->pcm_free; |
| 1060 | printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name, |
| 1061 | cpu_dai->name); |
| 1062 | return ret; |
| 1063 | } |
| 1064 | |
| 1065 | /* codec register dump */ |
| 1066 | static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf) |
| 1067 | { |
| 1068 | int i, step = 1, count = 0; |
| 1069 | |
| 1070 | if (!codec->reg_cache_size) |
| 1071 | return 0; |
| 1072 | |
| 1073 | if (codec->reg_cache_step) |
| 1074 | step = codec->reg_cache_step; |
| 1075 | |
| 1076 | count += sprintf(buf, "%s registers\n", codec->name); |
| 1077 | for (i = 0; i < codec->reg_cache_size; i += step) { |
| 1078 | count += sprintf(buf + count, "%2x: ", i); |
| 1079 | if (count >= PAGE_SIZE - 1) |
| 1080 | break; |
| 1081 | |
| 1082 | if (codec->display_register) |
| 1083 | count += codec->display_register(codec, buf + count, |
| 1084 | PAGE_SIZE - count, i); |
| 1085 | else |
| 1086 | count += snprintf(buf + count, PAGE_SIZE - count, |
| 1087 | "%4x", codec->read(codec, i)); |
| 1088 | |
| 1089 | if (count >= PAGE_SIZE - 1) |
| 1090 | break; |
| 1091 | |
| 1092 | count += snprintf(buf + count, PAGE_SIZE - count, "\n"); |
| 1093 | if (count >= PAGE_SIZE - 1) |
| 1094 | break; |
| 1095 | } |
| 1096 | |
| 1097 | /* Truncate count; min() would cause a warning */ |
| 1098 | if (count >= PAGE_SIZE) |
| 1099 | count = PAGE_SIZE - 1; |
| 1100 | |
| 1101 | return count; |
| 1102 | } |
| 1103 | static ssize_t codec_reg_show(struct device *dev, |
| 1104 | struct device_attribute *attr, char *buf) |
| 1105 | { |
| 1106 | struct snd_soc_device *devdata = dev_get_drvdata(dev); |
| 1107 | return soc_codec_reg_show(devdata->card->codec, buf); |
| 1108 | } |
| 1109 | |
| 1110 | static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL); |
| 1111 | |
| 1112 | #ifdef CONFIG_DEBUG_FS |
| 1113 | static int codec_reg_open_file(struct inode *inode, struct file *file) |
| 1114 | { |
| 1115 | file->private_data = inode->i_private; |
| 1116 | return 0; |
| 1117 | } |
| 1118 | |
| 1119 | static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf, |
| 1120 | size_t count, loff_t *ppos) |
| 1121 | { |
| 1122 | ssize_t ret; |
| 1123 | struct snd_soc_codec *codec = file->private_data; |
| 1124 | char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 1125 | if (!buf) |
| 1126 | return -ENOMEM; |
| 1127 | ret = soc_codec_reg_show(codec, buf); |
| 1128 | if (ret >= 0) |
| 1129 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); |
| 1130 | kfree(buf); |
| 1131 | return ret; |
| 1132 | } |
| 1133 | |
| 1134 | static ssize_t codec_reg_write_file(struct file *file, |
| 1135 | const char __user *user_buf, size_t count, loff_t *ppos) |
| 1136 | { |
| 1137 | char buf[32]; |
| 1138 | int buf_size; |
| 1139 | char *start = buf; |
| 1140 | unsigned long reg, value; |
| 1141 | int step = 1; |
| 1142 | struct snd_soc_codec *codec = file->private_data; |
| 1143 | |
| 1144 | buf_size = min(count, (sizeof(buf)-1)); |
| 1145 | if (copy_from_user(buf, user_buf, buf_size)) |
| 1146 | return -EFAULT; |
| 1147 | buf[buf_size] = 0; |
| 1148 | |
| 1149 | if (codec->reg_cache_step) |
| 1150 | step = codec->reg_cache_step; |
| 1151 | |
| 1152 | while (*start == ' ') |
| 1153 | start++; |
| 1154 | reg = simple_strtoul(start, &start, 16); |
| 1155 | if ((reg >= codec->reg_cache_size) || (reg % step)) |
| 1156 | return -EINVAL; |
| 1157 | while (*start == ' ') |
| 1158 | start++; |
| 1159 | if (strict_strtoul(start, 16, &value)) |
| 1160 | return -EINVAL; |
| 1161 | codec->write(codec, reg, value); |
| 1162 | return buf_size; |
| 1163 | } |
| 1164 | |
| 1165 | static const struct file_operations codec_reg_fops = { |
| 1166 | .open = codec_reg_open_file, |
| 1167 | .read = codec_reg_read_file, |
| 1168 | .write = codec_reg_write_file, |
| 1169 | }; |
| 1170 | |
| 1171 | static void soc_init_codec_debugfs(struct snd_soc_codec *codec) |
| 1172 | { |
| 1173 | codec->debugfs_reg = debugfs_create_file("codec_reg", 0644, |
| 1174 | debugfs_root, codec, |
| 1175 | &codec_reg_fops); |
| 1176 | if (!codec->debugfs_reg) |
| 1177 | printk(KERN_WARNING |
| 1178 | "ASoC: Failed to create codec register debugfs file\n"); |
| 1179 | |
| 1180 | codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744, |
| 1181 | debugfs_root, |
| 1182 | &codec->pop_time); |
| 1183 | if (!codec->debugfs_pop_time) |
| 1184 | printk(KERN_WARNING |
| 1185 | "Failed to create pop time debugfs file\n"); |
| 1186 | } |
| 1187 | |
| 1188 | static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) |
| 1189 | { |
| 1190 | debugfs_remove(codec->debugfs_pop_time); |
| 1191 | debugfs_remove(codec->debugfs_reg); |
| 1192 | } |
| 1193 | |
| 1194 | #else |
| 1195 | |
| 1196 | static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec) |
| 1197 | { |
| 1198 | } |
| 1199 | |
| 1200 | static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) |
| 1201 | { |
| 1202 | } |
| 1203 | #endif |
| 1204 | |
| 1205 | /** |
| 1206 | * snd_soc_new_ac97_codec - initailise AC97 device |
| 1207 | * @codec: audio codec |
| 1208 | * @ops: AC97 bus operations |
| 1209 | * @num: AC97 codec number |
| 1210 | * |
| 1211 | * Initialises AC97 codec resources for use by ad-hoc devices only. |
| 1212 | */ |
| 1213 | int snd_soc_new_ac97_codec(struct snd_soc_codec *codec, |
| 1214 | struct snd_ac97_bus_ops *ops, int num) |
| 1215 | { |
| 1216 | mutex_lock(&codec->mutex); |
| 1217 | |
| 1218 | codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL); |
| 1219 | if (codec->ac97 == NULL) { |
| 1220 | mutex_unlock(&codec->mutex); |
| 1221 | return -ENOMEM; |
| 1222 | } |
| 1223 | |
| 1224 | codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL); |
| 1225 | if (codec->ac97->bus == NULL) { |
| 1226 | kfree(codec->ac97); |
| 1227 | codec->ac97 = NULL; |
| 1228 | mutex_unlock(&codec->mutex); |
| 1229 | return -ENOMEM; |
| 1230 | } |
| 1231 | |
| 1232 | codec->ac97->bus->ops = ops; |
| 1233 | codec->ac97->num = num; |
| 1234 | mutex_unlock(&codec->mutex); |
| 1235 | return 0; |
| 1236 | } |
| 1237 | EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec); |
| 1238 | |
| 1239 | /** |
| 1240 | * snd_soc_free_ac97_codec - free AC97 codec device |
| 1241 | * @codec: audio codec |
| 1242 | * |
| 1243 | * Frees AC97 codec device resources. |
| 1244 | */ |
| 1245 | void snd_soc_free_ac97_codec(struct snd_soc_codec *codec) |
| 1246 | { |
| 1247 | mutex_lock(&codec->mutex); |
| 1248 | kfree(codec->ac97->bus); |
| 1249 | kfree(codec->ac97); |
| 1250 | codec->ac97 = NULL; |
| 1251 | mutex_unlock(&codec->mutex); |
| 1252 | } |
| 1253 | EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec); |
| 1254 | |
| 1255 | /** |
| 1256 | * snd_soc_update_bits - update codec register bits |
| 1257 | * @codec: audio codec |
| 1258 | * @reg: codec register |
| 1259 | * @mask: register mask |
| 1260 | * @value: new value |
| 1261 | * |
| 1262 | * Writes new register value. |
| 1263 | * |
| 1264 | * Returns 1 for change else 0. |
| 1265 | */ |
| 1266 | int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg, |
| 1267 | unsigned int mask, unsigned int value) |
| 1268 | { |
| 1269 | int change; |
| 1270 | unsigned int old, new; |
| 1271 | |
| 1272 | mutex_lock(&io_mutex); |
| 1273 | old = snd_soc_read(codec, reg); |
| 1274 | new = (old & ~mask) | value; |
| 1275 | change = old != new; |
| 1276 | if (change) |
| 1277 | snd_soc_write(codec, reg, new); |
| 1278 | |
| 1279 | mutex_unlock(&io_mutex); |
| 1280 | return change; |
| 1281 | } |
| 1282 | EXPORT_SYMBOL_GPL(snd_soc_update_bits); |
| 1283 | |
| 1284 | /** |
| 1285 | * snd_soc_test_bits - test register for change |
| 1286 | * @codec: audio codec |
| 1287 | * @reg: codec register |
| 1288 | * @mask: register mask |
| 1289 | * @value: new value |
| 1290 | * |
| 1291 | * Tests a register with a new value and checks if the new value is |
| 1292 | * different from the old value. |
| 1293 | * |
| 1294 | * Returns 1 for change else 0. |
| 1295 | */ |
| 1296 | int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg, |
| 1297 | unsigned int mask, unsigned int value) |
| 1298 | { |
| 1299 | int change; |
| 1300 | unsigned int old, new; |
| 1301 | |
| 1302 | mutex_lock(&io_mutex); |
| 1303 | old = snd_soc_read(codec, reg); |
| 1304 | new = (old & ~mask) | value; |
| 1305 | change = old != new; |
| 1306 | mutex_unlock(&io_mutex); |
| 1307 | |
| 1308 | return change; |
| 1309 | } |
| 1310 | EXPORT_SYMBOL_GPL(snd_soc_test_bits); |
| 1311 | |
| 1312 | /** |
| 1313 | * snd_soc_new_pcms - create new sound card and pcms |
| 1314 | * @socdev: the SoC audio device |
| 1315 | * @idx: ALSA card index |
| 1316 | * @xid: card identification |
| 1317 | * |
| 1318 | * Create a new sound card based upon the codec and interface pcms. |
| 1319 | * |
| 1320 | * Returns 0 for success, else error. |
| 1321 | */ |
| 1322 | int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid) |
| 1323 | { |
| 1324 | struct snd_soc_card *card = socdev->card; |
| 1325 | struct snd_soc_codec *codec = card->codec; |
| 1326 | int ret, i; |
| 1327 | |
| 1328 | mutex_lock(&codec->mutex); |
| 1329 | |
| 1330 | /* register a sound card */ |
| 1331 | ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card); |
| 1332 | if (ret < 0) { |
| 1333 | printk(KERN_ERR "asoc: can't create sound card for codec %s\n", |
| 1334 | codec->name); |
| 1335 | mutex_unlock(&codec->mutex); |
| 1336 | return ret; |
| 1337 | } |
| 1338 | |
| 1339 | codec->socdev = socdev; |
| 1340 | codec->card->dev = socdev->dev; |
| 1341 | codec->card->private_data = codec; |
| 1342 | strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver)); |
| 1343 | |
| 1344 | /* create the pcms */ |
| 1345 | for (i = 0; i < card->num_links; i++) { |
| 1346 | ret = soc_new_pcm(socdev, &card->dai_link[i], i); |
| 1347 | if (ret < 0) { |
| 1348 | printk(KERN_ERR "asoc: can't create pcm %s\n", |
| 1349 | card->dai_link[i].stream_name); |
| 1350 | mutex_unlock(&codec->mutex); |
| 1351 | return ret; |
| 1352 | } |
| 1353 | } |
| 1354 | |
| 1355 | mutex_unlock(&codec->mutex); |
| 1356 | return ret; |
| 1357 | } |
| 1358 | EXPORT_SYMBOL_GPL(snd_soc_new_pcms); |
| 1359 | |
| 1360 | /** |
| 1361 | * snd_soc_init_card - register sound card |
| 1362 | * @socdev: the SoC audio device |
| 1363 | * |
| 1364 | * Register a SoC sound card. Also registers an AC97 device if the |
| 1365 | * codec is AC97 for ad hoc devices. |
| 1366 | * |
| 1367 | * Returns 0 for success, else error. |
| 1368 | */ |
| 1369 | int snd_soc_init_card(struct snd_soc_device *socdev) |
| 1370 | { |
| 1371 | struct snd_soc_card *card = socdev->card; |
| 1372 | struct snd_soc_codec *codec = card->codec; |
| 1373 | int ret = 0, i, ac97 = 0, err = 0; |
| 1374 | |
| 1375 | for (i = 0; i < card->num_links; i++) { |
| 1376 | if (card->dai_link[i].init) { |
| 1377 | err = card->dai_link[i].init(codec); |
| 1378 | if (err < 0) { |
| 1379 | printk(KERN_ERR "asoc: failed to init %s\n", |
| 1380 | card->dai_link[i].stream_name); |
| 1381 | continue; |
| 1382 | } |
| 1383 | } |
| 1384 | if (card->dai_link[i].codec_dai->ac97_control) |
| 1385 | ac97 = 1; |
| 1386 | } |
| 1387 | snprintf(codec->card->shortname, sizeof(codec->card->shortname), |
| 1388 | "%s", card->name); |
| 1389 | snprintf(codec->card->longname, sizeof(codec->card->longname), |
| 1390 | "%s (%s)", card->name, codec->name); |
| 1391 | |
| 1392 | ret = snd_card_register(codec->card); |
| 1393 | if (ret < 0) { |
| 1394 | printk(KERN_ERR "asoc: failed to register soundcard for %s\n", |
| 1395 | codec->name); |
| 1396 | goto out; |
| 1397 | } |
| 1398 | |
| 1399 | mutex_lock(&codec->mutex); |
| 1400 | #ifdef CONFIG_SND_SOC_AC97_BUS |
| 1401 | /* Only instantiate AC97 if not already done by the adaptor |
| 1402 | * for the generic AC97 subsystem. |
| 1403 | */ |
| 1404 | if (ac97 && strcmp(codec->name, "AC97") != 0) { |
| 1405 | ret = soc_ac97_dev_register(codec); |
| 1406 | if (ret < 0) { |
| 1407 | printk(KERN_ERR "asoc: AC97 device register failed\n"); |
| 1408 | snd_card_free(codec->card); |
| 1409 | mutex_unlock(&codec->mutex); |
| 1410 | goto out; |
| 1411 | } |
| 1412 | } |
| 1413 | #endif |
| 1414 | |
| 1415 | err = snd_soc_dapm_sys_add(socdev->dev); |
| 1416 | if (err < 0) |
| 1417 | printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n"); |
| 1418 | |
| 1419 | err = device_create_file(socdev->dev, &dev_attr_codec_reg); |
| 1420 | if (err < 0) |
| 1421 | printk(KERN_WARNING "asoc: failed to add codec sysfs files\n"); |
| 1422 | |
| 1423 | soc_init_codec_debugfs(codec); |
| 1424 | mutex_unlock(&codec->mutex); |
| 1425 | |
| 1426 | out: |
| 1427 | return ret; |
| 1428 | } |
| 1429 | EXPORT_SYMBOL_GPL(snd_soc_init_card); |
| 1430 | |
| 1431 | /** |
| 1432 | * snd_soc_free_pcms - free sound card and pcms |
| 1433 | * @socdev: the SoC audio device |
| 1434 | * |
| 1435 | * Frees sound card and pcms associated with the socdev. |
| 1436 | * Also unregister the codec if it is an AC97 device. |
| 1437 | */ |
| 1438 | void snd_soc_free_pcms(struct snd_soc_device *socdev) |
| 1439 | { |
| 1440 | struct snd_soc_codec *codec = socdev->card->codec; |
| 1441 | #ifdef CONFIG_SND_SOC_AC97_BUS |
| 1442 | struct snd_soc_dai *codec_dai; |
| 1443 | int i; |
| 1444 | #endif |
| 1445 | |
| 1446 | mutex_lock(&codec->mutex); |
| 1447 | soc_cleanup_codec_debugfs(codec); |
| 1448 | #ifdef CONFIG_SND_SOC_AC97_BUS |
| 1449 | for (i = 0; i < codec->num_dai; i++) { |
| 1450 | codec_dai = &codec->dai[i]; |
| 1451 | if (codec_dai->ac97_control && codec->ac97 && |
| 1452 | strcmp(codec->name, "AC97") != 0) { |
| 1453 | soc_ac97_dev_unregister(codec); |
| 1454 | goto free_card; |
| 1455 | } |
| 1456 | } |
| 1457 | free_card: |
| 1458 | #endif |
| 1459 | |
| 1460 | if (codec->card) |
| 1461 | snd_card_free(codec->card); |
| 1462 | device_remove_file(socdev->dev, &dev_attr_codec_reg); |
| 1463 | mutex_unlock(&codec->mutex); |
| 1464 | } |
| 1465 | EXPORT_SYMBOL_GPL(snd_soc_free_pcms); |
| 1466 | |
| 1467 | /** |
| 1468 | * snd_soc_set_runtime_hwparams - set the runtime hardware parameters |
| 1469 | * @substream: the pcm substream |
| 1470 | * @hw: the hardware parameters |
| 1471 | * |
| 1472 | * Sets the substream runtime hardware parameters. |
| 1473 | */ |
| 1474 | int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, |
| 1475 | const struct snd_pcm_hardware *hw) |
| 1476 | { |
| 1477 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 1478 | runtime->hw.info = hw->info; |
| 1479 | runtime->hw.formats = hw->formats; |
| 1480 | runtime->hw.period_bytes_min = hw->period_bytes_min; |
| 1481 | runtime->hw.period_bytes_max = hw->period_bytes_max; |
| 1482 | runtime->hw.periods_min = hw->periods_min; |
| 1483 | runtime->hw.periods_max = hw->periods_max; |
| 1484 | runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; |
| 1485 | runtime->hw.fifo_size = hw->fifo_size; |
| 1486 | return 0; |
| 1487 | } |
| 1488 | EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); |
| 1489 | |
| 1490 | /** |
| 1491 | * snd_soc_cnew - create new control |
| 1492 | * @_template: control template |
| 1493 | * @data: control private data |
| 1494 | * @long_name: control long name |
| 1495 | * |
| 1496 | * Create a new mixer control from a template control. |
| 1497 | * |
| 1498 | * Returns 0 for success, else error. |
| 1499 | */ |
| 1500 | struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, |
| 1501 | void *data, char *long_name) |
| 1502 | { |
| 1503 | struct snd_kcontrol_new template; |
| 1504 | |
| 1505 | memcpy(&template, _template, sizeof(template)); |
| 1506 | if (long_name) |
| 1507 | template.name = long_name; |
| 1508 | template.index = 0; |
| 1509 | |
| 1510 | return snd_ctl_new1(&template, data); |
| 1511 | } |
| 1512 | EXPORT_SYMBOL_GPL(snd_soc_cnew); |
| 1513 | |
| 1514 | /** |
| 1515 | * snd_soc_add_controls - add an array of controls to a codec. |
| 1516 | * Convienience function to add a list of controls. Many codecs were |
| 1517 | * duplicating this code. |
| 1518 | * |
| 1519 | * @codec: codec to add controls to |
| 1520 | * @controls: array of controls to add |
| 1521 | * @num_controls: number of elements in the array |
| 1522 | * |
| 1523 | * Return 0 for success, else error. |
| 1524 | */ |
| 1525 | int snd_soc_add_controls(struct snd_soc_codec *codec, |
| 1526 | const struct snd_kcontrol_new *controls, int num_controls) |
| 1527 | { |
| 1528 | struct snd_card *card = codec->card; |
| 1529 | int err, i; |
| 1530 | |
| 1531 | for (i = 0; i < num_controls; i++) { |
| 1532 | const struct snd_kcontrol_new *control = &controls[i]; |
| 1533 | err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL)); |
| 1534 | if (err < 0) { |
| 1535 | dev_err(codec->dev, "%s: Failed to add %s\n", |
| 1536 | codec->name, control->name); |
| 1537 | return err; |
| 1538 | } |
| 1539 | } |
| 1540 | |
| 1541 | return 0; |
| 1542 | } |
| 1543 | EXPORT_SYMBOL_GPL(snd_soc_add_controls); |
| 1544 | |
| 1545 | /** |
| 1546 | * snd_soc_info_enum_double - enumerated double mixer info callback |
| 1547 | * @kcontrol: mixer control |
| 1548 | * @uinfo: control element information |
| 1549 | * |
| 1550 | * Callback to provide information about a double enumerated |
| 1551 | * mixer control. |
| 1552 | * |
| 1553 | * Returns 0 for success. |
| 1554 | */ |
| 1555 | int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol, |
| 1556 | struct snd_ctl_elem_info *uinfo) |
| 1557 | { |
| 1558 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| 1559 | |
| 1560 | uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; |
| 1561 | uinfo->count = e->shift_l == e->shift_r ? 1 : 2; |
| 1562 | uinfo->value.enumerated.items = e->max; |
| 1563 | |
| 1564 | if (uinfo->value.enumerated.item > e->max - 1) |
| 1565 | uinfo->value.enumerated.item = e->max - 1; |
| 1566 | strcpy(uinfo->value.enumerated.name, |
| 1567 | e->texts[uinfo->value.enumerated.item]); |
| 1568 | return 0; |
| 1569 | } |
| 1570 | EXPORT_SYMBOL_GPL(snd_soc_info_enum_double); |
| 1571 | |
| 1572 | /** |
| 1573 | * snd_soc_get_enum_double - enumerated double mixer get callback |
| 1574 | * @kcontrol: mixer control |
| 1575 | * @ucontrol: control element information |
| 1576 | * |
| 1577 | * Callback to get the value of a double enumerated mixer. |
| 1578 | * |
| 1579 | * Returns 0 for success. |
| 1580 | */ |
| 1581 | int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol, |
| 1582 | struct snd_ctl_elem_value *ucontrol) |
| 1583 | { |
| 1584 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1585 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| 1586 | unsigned int val, bitmask; |
| 1587 | |
| 1588 | for (bitmask = 1; bitmask < e->max; bitmask <<= 1) |
| 1589 | ; |
| 1590 | val = snd_soc_read(codec, e->reg); |
| 1591 | ucontrol->value.enumerated.item[0] |
| 1592 | = (val >> e->shift_l) & (bitmask - 1); |
| 1593 | if (e->shift_l != e->shift_r) |
| 1594 | ucontrol->value.enumerated.item[1] = |
| 1595 | (val >> e->shift_r) & (bitmask - 1); |
| 1596 | |
| 1597 | return 0; |
| 1598 | } |
| 1599 | EXPORT_SYMBOL_GPL(snd_soc_get_enum_double); |
| 1600 | |
| 1601 | /** |
| 1602 | * snd_soc_put_enum_double - enumerated double mixer put callback |
| 1603 | * @kcontrol: mixer control |
| 1604 | * @ucontrol: control element information |
| 1605 | * |
| 1606 | * Callback to set the value of a double enumerated mixer. |
| 1607 | * |
| 1608 | * Returns 0 for success. |
| 1609 | */ |
| 1610 | int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol, |
| 1611 | struct snd_ctl_elem_value *ucontrol) |
| 1612 | { |
| 1613 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1614 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| 1615 | unsigned int val; |
| 1616 | unsigned int mask, bitmask; |
| 1617 | |
| 1618 | for (bitmask = 1; bitmask < e->max; bitmask <<= 1) |
| 1619 | ; |
| 1620 | if (ucontrol->value.enumerated.item[0] > e->max - 1) |
| 1621 | return -EINVAL; |
| 1622 | val = ucontrol->value.enumerated.item[0] << e->shift_l; |
| 1623 | mask = (bitmask - 1) << e->shift_l; |
| 1624 | if (e->shift_l != e->shift_r) { |
| 1625 | if (ucontrol->value.enumerated.item[1] > e->max - 1) |
| 1626 | return -EINVAL; |
| 1627 | val |= ucontrol->value.enumerated.item[1] << e->shift_r; |
| 1628 | mask |= (bitmask - 1) << e->shift_r; |
| 1629 | } |
| 1630 | |
| 1631 | return snd_soc_update_bits(codec, e->reg, mask, val); |
| 1632 | } |
| 1633 | EXPORT_SYMBOL_GPL(snd_soc_put_enum_double); |
| 1634 | |
| 1635 | /** |
| 1636 | * snd_soc_get_value_enum_double - semi enumerated double mixer get callback |
| 1637 | * @kcontrol: mixer control |
| 1638 | * @ucontrol: control element information |
| 1639 | * |
| 1640 | * Callback to get the value of a double semi enumerated mixer. |
| 1641 | * |
| 1642 | * Semi enumerated mixer: the enumerated items are referred as values. Can be |
| 1643 | * used for handling bitfield coded enumeration for example. |
| 1644 | * |
| 1645 | * Returns 0 for success. |
| 1646 | */ |
| 1647 | int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol, |
| 1648 | struct snd_ctl_elem_value *ucontrol) |
| 1649 | { |
| 1650 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1651 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| 1652 | unsigned int reg_val, val, mux; |
| 1653 | |
| 1654 | reg_val = snd_soc_read(codec, e->reg); |
| 1655 | val = (reg_val >> e->shift_l) & e->mask; |
| 1656 | for (mux = 0; mux < e->max; mux++) { |
| 1657 | if (val == e->values[mux]) |
| 1658 | break; |
| 1659 | } |
| 1660 | ucontrol->value.enumerated.item[0] = mux; |
| 1661 | if (e->shift_l != e->shift_r) { |
| 1662 | val = (reg_val >> e->shift_r) & e->mask; |
| 1663 | for (mux = 0; mux < e->max; mux++) { |
| 1664 | if (val == e->values[mux]) |
| 1665 | break; |
| 1666 | } |
| 1667 | ucontrol->value.enumerated.item[1] = mux; |
| 1668 | } |
| 1669 | |
| 1670 | return 0; |
| 1671 | } |
| 1672 | EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double); |
| 1673 | |
| 1674 | /** |
| 1675 | * snd_soc_put_value_enum_double - semi enumerated double mixer put callback |
| 1676 | * @kcontrol: mixer control |
| 1677 | * @ucontrol: control element information |
| 1678 | * |
| 1679 | * Callback to set the value of a double semi enumerated mixer. |
| 1680 | * |
| 1681 | * Semi enumerated mixer: the enumerated items are referred as values. Can be |
| 1682 | * used for handling bitfield coded enumeration for example. |
| 1683 | * |
| 1684 | * Returns 0 for success. |
| 1685 | */ |
| 1686 | int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol, |
| 1687 | struct snd_ctl_elem_value *ucontrol) |
| 1688 | { |
| 1689 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1690 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| 1691 | unsigned int val; |
| 1692 | unsigned int mask; |
| 1693 | |
| 1694 | if (ucontrol->value.enumerated.item[0] > e->max - 1) |
| 1695 | return -EINVAL; |
| 1696 | val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l; |
| 1697 | mask = e->mask << e->shift_l; |
| 1698 | if (e->shift_l != e->shift_r) { |
| 1699 | if (ucontrol->value.enumerated.item[1] > e->max - 1) |
| 1700 | return -EINVAL; |
| 1701 | val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r; |
| 1702 | mask |= e->mask << e->shift_r; |
| 1703 | } |
| 1704 | |
| 1705 | return snd_soc_update_bits(codec, e->reg, mask, val); |
| 1706 | } |
| 1707 | EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double); |
| 1708 | |
| 1709 | /** |
| 1710 | * snd_soc_info_enum_ext - external enumerated single mixer info callback |
| 1711 | * @kcontrol: mixer control |
| 1712 | * @uinfo: control element information |
| 1713 | * |
| 1714 | * Callback to provide information about an external enumerated |
| 1715 | * single mixer. |
| 1716 | * |
| 1717 | * Returns 0 for success. |
| 1718 | */ |
| 1719 | int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol, |
| 1720 | struct snd_ctl_elem_info *uinfo) |
| 1721 | { |
| 1722 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
| 1723 | |
| 1724 | uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; |
| 1725 | uinfo->count = 1; |
| 1726 | uinfo->value.enumerated.items = e->max; |
| 1727 | |
| 1728 | if (uinfo->value.enumerated.item > e->max - 1) |
| 1729 | uinfo->value.enumerated.item = e->max - 1; |
| 1730 | strcpy(uinfo->value.enumerated.name, |
| 1731 | e->texts[uinfo->value.enumerated.item]); |
| 1732 | return 0; |
| 1733 | } |
| 1734 | EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext); |
| 1735 | |
| 1736 | /** |
| 1737 | * snd_soc_info_volsw_ext - external single mixer info callback |
| 1738 | * @kcontrol: mixer control |
| 1739 | * @uinfo: control element information |
| 1740 | * |
| 1741 | * Callback to provide information about a single external mixer control. |
| 1742 | * |
| 1743 | * Returns 0 for success. |
| 1744 | */ |
| 1745 | int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol, |
| 1746 | struct snd_ctl_elem_info *uinfo) |
| 1747 | { |
| 1748 | int max = kcontrol->private_value; |
| 1749 | |
| 1750 | if (max == 1 && !strstr(kcontrol->id.name, " Volume")) |
| 1751 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| 1752 | else |
| 1753 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 1754 | |
| 1755 | uinfo->count = 1; |
| 1756 | uinfo->value.integer.min = 0; |
| 1757 | uinfo->value.integer.max = max; |
| 1758 | return 0; |
| 1759 | } |
| 1760 | EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext); |
| 1761 | |
| 1762 | /** |
| 1763 | * snd_soc_info_volsw - single mixer info callback |
| 1764 | * @kcontrol: mixer control |
| 1765 | * @uinfo: control element information |
| 1766 | * |
| 1767 | * Callback to provide information about a single mixer control. |
| 1768 | * |
| 1769 | * Returns 0 for success. |
| 1770 | */ |
| 1771 | int snd_soc_info_volsw(struct snd_kcontrol *kcontrol, |
| 1772 | struct snd_ctl_elem_info *uinfo) |
| 1773 | { |
| 1774 | struct soc_mixer_control *mc = |
| 1775 | (struct soc_mixer_control *)kcontrol->private_value; |
| 1776 | int max = mc->max; |
| 1777 | unsigned int shift = mc->shift; |
| 1778 | unsigned int rshift = mc->rshift; |
| 1779 | |
| 1780 | if (max == 1 && !strstr(kcontrol->id.name, " Volume")) |
| 1781 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| 1782 | else |
| 1783 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 1784 | |
| 1785 | uinfo->count = shift == rshift ? 1 : 2; |
| 1786 | uinfo->value.integer.min = 0; |
| 1787 | uinfo->value.integer.max = max; |
| 1788 | return 0; |
| 1789 | } |
| 1790 | EXPORT_SYMBOL_GPL(snd_soc_info_volsw); |
| 1791 | |
| 1792 | /** |
| 1793 | * snd_soc_get_volsw - single mixer get callback |
| 1794 | * @kcontrol: mixer control |
| 1795 | * @ucontrol: control element information |
| 1796 | * |
| 1797 | * Callback to get the value of a single mixer control. |
| 1798 | * |
| 1799 | * Returns 0 for success. |
| 1800 | */ |
| 1801 | int snd_soc_get_volsw(struct snd_kcontrol *kcontrol, |
| 1802 | struct snd_ctl_elem_value *ucontrol) |
| 1803 | { |
| 1804 | struct soc_mixer_control *mc = |
| 1805 | (struct soc_mixer_control *)kcontrol->private_value; |
| 1806 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1807 | unsigned int reg = mc->reg; |
| 1808 | unsigned int shift = mc->shift; |
| 1809 | unsigned int rshift = mc->rshift; |
| 1810 | int max = mc->max; |
| 1811 | unsigned int mask = (1 << fls(max)) - 1; |
| 1812 | unsigned int invert = mc->invert; |
| 1813 | |
| 1814 | ucontrol->value.integer.value[0] = |
| 1815 | (snd_soc_read(codec, reg) >> shift) & mask; |
| 1816 | if (shift != rshift) |
| 1817 | ucontrol->value.integer.value[1] = |
| 1818 | (snd_soc_read(codec, reg) >> rshift) & mask; |
| 1819 | if (invert) { |
| 1820 | ucontrol->value.integer.value[0] = |
| 1821 | max - ucontrol->value.integer.value[0]; |
| 1822 | if (shift != rshift) |
| 1823 | ucontrol->value.integer.value[1] = |
| 1824 | max - ucontrol->value.integer.value[1]; |
| 1825 | } |
| 1826 | |
| 1827 | return 0; |
| 1828 | } |
| 1829 | EXPORT_SYMBOL_GPL(snd_soc_get_volsw); |
| 1830 | |
| 1831 | /** |
| 1832 | * snd_soc_put_volsw - single mixer put callback |
| 1833 | * @kcontrol: mixer control |
| 1834 | * @ucontrol: control element information |
| 1835 | * |
| 1836 | * Callback to set the value of a single mixer control. |
| 1837 | * |
| 1838 | * Returns 0 for success. |
| 1839 | */ |
| 1840 | int snd_soc_put_volsw(struct snd_kcontrol *kcontrol, |
| 1841 | struct snd_ctl_elem_value *ucontrol) |
| 1842 | { |
| 1843 | struct soc_mixer_control *mc = |
| 1844 | (struct soc_mixer_control *)kcontrol->private_value; |
| 1845 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1846 | unsigned int reg = mc->reg; |
| 1847 | unsigned int shift = mc->shift; |
| 1848 | unsigned int rshift = mc->rshift; |
| 1849 | int max = mc->max; |
| 1850 | unsigned int mask = (1 << fls(max)) - 1; |
| 1851 | unsigned int invert = mc->invert; |
| 1852 | unsigned int val, val2, val_mask; |
| 1853 | |
| 1854 | val = (ucontrol->value.integer.value[0] & mask); |
| 1855 | if (invert) |
| 1856 | val = max - val; |
| 1857 | val_mask = mask << shift; |
| 1858 | val = val << shift; |
| 1859 | if (shift != rshift) { |
| 1860 | val2 = (ucontrol->value.integer.value[1] & mask); |
| 1861 | if (invert) |
| 1862 | val2 = max - val2; |
| 1863 | val_mask |= mask << rshift; |
| 1864 | val |= val2 << rshift; |
| 1865 | } |
| 1866 | return snd_soc_update_bits(codec, reg, val_mask, val); |
| 1867 | } |
| 1868 | EXPORT_SYMBOL_GPL(snd_soc_put_volsw); |
| 1869 | |
| 1870 | /** |
| 1871 | * snd_soc_info_volsw_2r - double mixer info callback |
| 1872 | * @kcontrol: mixer control |
| 1873 | * @uinfo: control element information |
| 1874 | * |
| 1875 | * Callback to provide information about a double mixer control that |
| 1876 | * spans 2 codec registers. |
| 1877 | * |
| 1878 | * Returns 0 for success. |
| 1879 | */ |
| 1880 | int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol, |
| 1881 | struct snd_ctl_elem_info *uinfo) |
| 1882 | { |
| 1883 | struct soc_mixer_control *mc = |
| 1884 | (struct soc_mixer_control *)kcontrol->private_value; |
| 1885 | int max = mc->max; |
| 1886 | |
| 1887 | if (max == 1 && !strstr(kcontrol->id.name, " Volume")) |
| 1888 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| 1889 | else |
| 1890 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 1891 | |
| 1892 | uinfo->count = 2; |
| 1893 | uinfo->value.integer.min = 0; |
| 1894 | uinfo->value.integer.max = max; |
| 1895 | return 0; |
| 1896 | } |
| 1897 | EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r); |
| 1898 | |
| 1899 | /** |
| 1900 | * snd_soc_get_volsw_2r - double mixer get callback |
| 1901 | * @kcontrol: mixer control |
| 1902 | * @ucontrol: control element information |
| 1903 | * |
| 1904 | * Callback to get the value of a double mixer control that spans 2 registers. |
| 1905 | * |
| 1906 | * Returns 0 for success. |
| 1907 | */ |
| 1908 | int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol, |
| 1909 | struct snd_ctl_elem_value *ucontrol) |
| 1910 | { |
| 1911 | struct soc_mixer_control *mc = |
| 1912 | (struct soc_mixer_control *)kcontrol->private_value; |
| 1913 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1914 | unsigned int reg = mc->reg; |
| 1915 | unsigned int reg2 = mc->rreg; |
| 1916 | unsigned int shift = mc->shift; |
| 1917 | int max = mc->max; |
| 1918 | unsigned int mask = (1 << fls(max)) - 1; |
| 1919 | unsigned int invert = mc->invert; |
| 1920 | |
| 1921 | ucontrol->value.integer.value[0] = |
| 1922 | (snd_soc_read(codec, reg) >> shift) & mask; |
| 1923 | ucontrol->value.integer.value[1] = |
| 1924 | (snd_soc_read(codec, reg2) >> shift) & mask; |
| 1925 | if (invert) { |
| 1926 | ucontrol->value.integer.value[0] = |
| 1927 | max - ucontrol->value.integer.value[0]; |
| 1928 | ucontrol->value.integer.value[1] = |
| 1929 | max - ucontrol->value.integer.value[1]; |
| 1930 | } |
| 1931 | |
| 1932 | return 0; |
| 1933 | } |
| 1934 | EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r); |
| 1935 | |
| 1936 | /** |
| 1937 | * snd_soc_put_volsw_2r - double mixer set callback |
| 1938 | * @kcontrol: mixer control |
| 1939 | * @ucontrol: control element information |
| 1940 | * |
| 1941 | * Callback to set the value of a double mixer control that spans 2 registers. |
| 1942 | * |
| 1943 | * Returns 0 for success. |
| 1944 | */ |
| 1945 | int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol, |
| 1946 | struct snd_ctl_elem_value *ucontrol) |
| 1947 | { |
| 1948 | struct soc_mixer_control *mc = |
| 1949 | (struct soc_mixer_control *)kcontrol->private_value; |
| 1950 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 1951 | unsigned int reg = mc->reg; |
| 1952 | unsigned int reg2 = mc->rreg; |
| 1953 | unsigned int shift = mc->shift; |
| 1954 | int max = mc->max; |
| 1955 | unsigned int mask = (1 << fls(max)) - 1; |
| 1956 | unsigned int invert = mc->invert; |
| 1957 | int err; |
| 1958 | unsigned int val, val2, val_mask; |
| 1959 | |
| 1960 | val_mask = mask << shift; |
| 1961 | val = (ucontrol->value.integer.value[0] & mask); |
| 1962 | val2 = (ucontrol->value.integer.value[1] & mask); |
| 1963 | |
| 1964 | if (invert) { |
| 1965 | val = max - val; |
| 1966 | val2 = max - val2; |
| 1967 | } |
| 1968 | |
| 1969 | val = val << shift; |
| 1970 | val2 = val2 << shift; |
| 1971 | |
| 1972 | err = snd_soc_update_bits(codec, reg, val_mask, val); |
| 1973 | if (err < 0) |
| 1974 | return err; |
| 1975 | |
| 1976 | err = snd_soc_update_bits(codec, reg2, val_mask, val2); |
| 1977 | return err; |
| 1978 | } |
| 1979 | EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r); |
| 1980 | |
| 1981 | /** |
| 1982 | * snd_soc_info_volsw_s8 - signed mixer info callback |
| 1983 | * @kcontrol: mixer control |
| 1984 | * @uinfo: control element information |
| 1985 | * |
| 1986 | * Callback to provide information about a signed mixer control. |
| 1987 | * |
| 1988 | * Returns 0 for success. |
| 1989 | */ |
| 1990 | int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol, |
| 1991 | struct snd_ctl_elem_info *uinfo) |
| 1992 | { |
| 1993 | struct soc_mixer_control *mc = |
| 1994 | (struct soc_mixer_control *)kcontrol->private_value; |
| 1995 | int max = mc->max; |
| 1996 | int min = mc->min; |
| 1997 | |
| 1998 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 1999 | uinfo->count = 2; |
| 2000 | uinfo->value.integer.min = 0; |
| 2001 | uinfo->value.integer.max = max-min; |
| 2002 | return 0; |
| 2003 | } |
| 2004 | EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8); |
| 2005 | |
| 2006 | /** |
| 2007 | * snd_soc_get_volsw_s8 - signed mixer get callback |
| 2008 | * @kcontrol: mixer control |
| 2009 | * @ucontrol: control element information |
| 2010 | * |
| 2011 | * Callback to get the value of a signed mixer control. |
| 2012 | * |
| 2013 | * Returns 0 for success. |
| 2014 | */ |
| 2015 | int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol, |
| 2016 | struct snd_ctl_elem_value *ucontrol) |
| 2017 | { |
| 2018 | struct soc_mixer_control *mc = |
| 2019 | (struct soc_mixer_control *)kcontrol->private_value; |
| 2020 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 2021 | unsigned int reg = mc->reg; |
| 2022 | int min = mc->min; |
| 2023 | int val = snd_soc_read(codec, reg); |
| 2024 | |
| 2025 | ucontrol->value.integer.value[0] = |
| 2026 | ((signed char)(val & 0xff))-min; |
| 2027 | ucontrol->value.integer.value[1] = |
| 2028 | ((signed char)((val >> 8) & 0xff))-min; |
| 2029 | return 0; |
| 2030 | } |
| 2031 | EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8); |
| 2032 | |
| 2033 | /** |
| 2034 | * snd_soc_put_volsw_sgn - signed mixer put callback |
| 2035 | * @kcontrol: mixer control |
| 2036 | * @ucontrol: control element information |
| 2037 | * |
| 2038 | * Callback to set the value of a signed mixer control. |
| 2039 | * |
| 2040 | * Returns 0 for success. |
| 2041 | */ |
| 2042 | int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol, |
| 2043 | struct snd_ctl_elem_value *ucontrol) |
| 2044 | { |
| 2045 | struct soc_mixer_control *mc = |
| 2046 | (struct soc_mixer_control *)kcontrol->private_value; |
| 2047 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 2048 | unsigned int reg = mc->reg; |
| 2049 | int min = mc->min; |
| 2050 | unsigned int val; |
| 2051 | |
| 2052 | val = (ucontrol->value.integer.value[0]+min) & 0xff; |
| 2053 | val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8; |
| 2054 | |
| 2055 | return snd_soc_update_bits(codec, reg, 0xffff, val); |
| 2056 | } |
| 2057 | EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8); |
| 2058 | |
| 2059 | /** |
| 2060 | * snd_soc_dai_set_sysclk - configure DAI system or master clock. |
| 2061 | * @dai: DAI |
| 2062 | * @clk_id: DAI specific clock ID |
| 2063 | * @freq: new clock frequency in Hz |
| 2064 | * @dir: new clock direction - input/output. |
| 2065 | * |
| 2066 | * Configures the DAI master (MCLK) or system (SYSCLK) clocking. |
| 2067 | */ |
| 2068 | int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, |
| 2069 | unsigned int freq, int dir) |
| 2070 | { |
| 2071 | if (dai->ops && dai->ops->set_sysclk) |
| 2072 | return dai->ops->set_sysclk(dai, clk_id, freq, dir); |
| 2073 | else |
| 2074 | return -EINVAL; |
| 2075 | } |
| 2076 | EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); |
| 2077 | |
| 2078 | /** |
| 2079 | * snd_soc_dai_set_clkdiv - configure DAI clock dividers. |
| 2080 | * @dai: DAI |
| 2081 | * @div_id: DAI specific clock divider ID |
| 2082 | * @div: new clock divisor. |
| 2083 | * |
| 2084 | * Configures the clock dividers. This is used to derive the best DAI bit and |
| 2085 | * frame clocks from the system or master clock. It's best to set the DAI bit |
| 2086 | * and frame clocks as low as possible to save system power. |
| 2087 | */ |
| 2088 | int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, |
| 2089 | int div_id, int div) |
| 2090 | { |
| 2091 | if (dai->ops && dai->ops->set_clkdiv) |
| 2092 | return dai->ops->set_clkdiv(dai, div_id, div); |
| 2093 | else |
| 2094 | return -EINVAL; |
| 2095 | } |
| 2096 | EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); |
| 2097 | |
| 2098 | /** |
| 2099 | * snd_soc_dai_set_pll - configure DAI PLL. |
| 2100 | * @dai: DAI |
| 2101 | * @pll_id: DAI specific PLL ID |
| 2102 | * @freq_in: PLL input clock frequency in Hz |
| 2103 | * @freq_out: requested PLL output clock frequency in Hz |
| 2104 | * |
| 2105 | * Configures and enables PLL to generate output clock based on input clock. |
| 2106 | */ |
| 2107 | int snd_soc_dai_set_pll(struct snd_soc_dai *dai, |
| 2108 | int pll_id, unsigned int freq_in, unsigned int freq_out) |
| 2109 | { |
| 2110 | if (dai->ops && dai->ops->set_pll) |
| 2111 | return dai->ops->set_pll(dai, pll_id, freq_in, freq_out); |
| 2112 | else |
| 2113 | return -EINVAL; |
| 2114 | } |
| 2115 | EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); |
| 2116 | |
| 2117 | /** |
| 2118 | * snd_soc_dai_set_fmt - configure DAI hardware audio format. |
| 2119 | * @dai: DAI |
| 2120 | * @fmt: SND_SOC_DAIFMT_ format value. |
| 2121 | * |
| 2122 | * Configures the DAI hardware format and clocking. |
| 2123 | */ |
| 2124 | int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
| 2125 | { |
| 2126 | if (dai->ops && dai->ops->set_fmt) |
| 2127 | return dai->ops->set_fmt(dai, fmt); |
| 2128 | else |
| 2129 | return -EINVAL; |
| 2130 | } |
| 2131 | EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); |
| 2132 | |
| 2133 | /** |
| 2134 | * snd_soc_dai_set_tdm_slot - configure DAI TDM. |
| 2135 | * @dai: DAI |
| 2136 | * @mask: DAI specific mask representing used slots. |
| 2137 | * @slots: Number of slots in use. |
| 2138 | * |
| 2139 | * Configures a DAI for TDM operation. Both mask and slots are codec and DAI |
| 2140 | * specific. |
| 2141 | */ |
| 2142 | int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, |
| 2143 | unsigned int mask, int slots) |
| 2144 | { |
| 2145 | if (dai->ops && dai->ops->set_tdm_slot) |
| 2146 | return dai->ops->set_tdm_slot(dai, mask, slots); |
| 2147 | else |
| 2148 | return -EINVAL; |
| 2149 | } |
| 2150 | EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); |
| 2151 | |
| 2152 | /** |
| 2153 | * snd_soc_dai_set_tristate - configure DAI system or master clock. |
| 2154 | * @dai: DAI |
| 2155 | * @tristate: tristate enable |
| 2156 | * |
| 2157 | * Tristates the DAI so that others can use it. |
| 2158 | */ |
| 2159 | int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) |
| 2160 | { |
| 2161 | if (dai->ops && dai->ops->set_tristate) |
| 2162 | return dai->ops->set_tristate(dai, tristate); |
| 2163 | else |
| 2164 | return -EINVAL; |
| 2165 | } |
| 2166 | EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); |
| 2167 | |
| 2168 | /** |
| 2169 | * snd_soc_dai_digital_mute - configure DAI system or master clock. |
| 2170 | * @dai: DAI |
| 2171 | * @mute: mute enable |
| 2172 | * |
| 2173 | * Mutes the DAI DAC. |
| 2174 | */ |
| 2175 | int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute) |
| 2176 | { |
| 2177 | if (dai->ops && dai->ops->digital_mute) |
| 2178 | return dai->ops->digital_mute(dai, mute); |
| 2179 | else |
| 2180 | return -EINVAL; |
| 2181 | } |
| 2182 | EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); |
| 2183 | |
| 2184 | /** |
| 2185 | * snd_soc_register_card - Register a card with the ASoC core |
| 2186 | * |
| 2187 | * @card: Card to register |
| 2188 | * |
| 2189 | * Note that currently this is an internal only function: it will be |
| 2190 | * exposed to machine drivers after further backporting of ASoC v2 |
| 2191 | * registration APIs. |
| 2192 | */ |
| 2193 | static int snd_soc_register_card(struct snd_soc_card *card) |
| 2194 | { |
| 2195 | if (!card->name || !card->dev) |
| 2196 | return -EINVAL; |
| 2197 | |
| 2198 | INIT_LIST_HEAD(&card->list); |
| 2199 | card->instantiated = 0; |
| 2200 | |
| 2201 | mutex_lock(&client_mutex); |
| 2202 | list_add(&card->list, &card_list); |
| 2203 | snd_soc_instantiate_cards(); |
| 2204 | mutex_unlock(&client_mutex); |
| 2205 | |
| 2206 | dev_dbg(card->dev, "Registered card '%s'\n", card->name); |
| 2207 | |
| 2208 | return 0; |
| 2209 | } |
| 2210 | |
| 2211 | /** |
| 2212 | * snd_soc_unregister_card - Unregister a card with the ASoC core |
| 2213 | * |
| 2214 | * @card: Card to unregister |
| 2215 | * |
| 2216 | * Note that currently this is an internal only function: it will be |
| 2217 | * exposed to machine drivers after further backporting of ASoC v2 |
| 2218 | * registration APIs. |
| 2219 | */ |
| 2220 | static int snd_soc_unregister_card(struct snd_soc_card *card) |
| 2221 | { |
| 2222 | mutex_lock(&client_mutex); |
| 2223 | list_del(&card->list); |
| 2224 | mutex_unlock(&client_mutex); |
| 2225 | |
| 2226 | dev_dbg(card->dev, "Unregistered card '%s'\n", card->name); |
| 2227 | |
| 2228 | return 0; |
| 2229 | } |
| 2230 | |
| 2231 | static struct snd_soc_dai_ops null_dai_ops = { |
| 2232 | }; |
| 2233 | |
| 2234 | /** |
| 2235 | * snd_soc_register_dai - Register a DAI with the ASoC core |
| 2236 | * |
| 2237 | * @dai: DAI to register |
| 2238 | */ |
| 2239 | int snd_soc_register_dai(struct snd_soc_dai *dai) |
| 2240 | { |
| 2241 | if (!dai->name) |
| 2242 | return -EINVAL; |
| 2243 | |
| 2244 | /* The device should become mandatory over time */ |
| 2245 | if (!dai->dev) |
| 2246 | printk(KERN_WARNING "No device for DAI %s\n", dai->name); |
| 2247 | |
| 2248 | if (!dai->ops) |
| 2249 | dai->ops = &null_dai_ops; |
| 2250 | |
| 2251 | INIT_LIST_HEAD(&dai->list); |
| 2252 | |
| 2253 | mutex_lock(&client_mutex); |
| 2254 | list_add(&dai->list, &dai_list); |
| 2255 | snd_soc_instantiate_cards(); |
| 2256 | mutex_unlock(&client_mutex); |
| 2257 | |
| 2258 | pr_debug("Registered DAI '%s'\n", dai->name); |
| 2259 | |
| 2260 | return 0; |
| 2261 | } |
| 2262 | EXPORT_SYMBOL_GPL(snd_soc_register_dai); |
| 2263 | |
| 2264 | /** |
| 2265 | * snd_soc_unregister_dai - Unregister a DAI from the ASoC core |
| 2266 | * |
| 2267 | * @dai: DAI to unregister |
| 2268 | */ |
| 2269 | void snd_soc_unregister_dai(struct snd_soc_dai *dai) |
| 2270 | { |
| 2271 | mutex_lock(&client_mutex); |
| 2272 | list_del(&dai->list); |
| 2273 | mutex_unlock(&client_mutex); |
| 2274 | |
| 2275 | pr_debug("Unregistered DAI '%s'\n", dai->name); |
| 2276 | } |
| 2277 | EXPORT_SYMBOL_GPL(snd_soc_unregister_dai); |
| 2278 | |
| 2279 | /** |
| 2280 | * snd_soc_register_dais - Register multiple DAIs with the ASoC core |
| 2281 | * |
| 2282 | * @dai: Array of DAIs to register |
| 2283 | * @count: Number of DAIs |
| 2284 | */ |
| 2285 | int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count) |
| 2286 | { |
| 2287 | int i, ret; |
| 2288 | |
| 2289 | for (i = 0; i < count; i++) { |
| 2290 | ret = snd_soc_register_dai(&dai[i]); |
| 2291 | if (ret != 0) |
| 2292 | goto err; |
| 2293 | } |
| 2294 | |
| 2295 | return 0; |
| 2296 | |
| 2297 | err: |
| 2298 | for (i--; i >= 0; i--) |
| 2299 | snd_soc_unregister_dai(&dai[i]); |
| 2300 | |
| 2301 | return ret; |
| 2302 | } |
| 2303 | EXPORT_SYMBOL_GPL(snd_soc_register_dais); |
| 2304 | |
| 2305 | /** |
| 2306 | * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core |
| 2307 | * |
| 2308 | * @dai: Array of DAIs to unregister |
| 2309 | * @count: Number of DAIs |
| 2310 | */ |
| 2311 | void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count) |
| 2312 | { |
| 2313 | int i; |
| 2314 | |
| 2315 | for (i = 0; i < count; i++) |
| 2316 | snd_soc_unregister_dai(&dai[i]); |
| 2317 | } |
| 2318 | EXPORT_SYMBOL_GPL(snd_soc_unregister_dais); |
| 2319 | |
| 2320 | /** |
| 2321 | * snd_soc_register_platform - Register a platform with the ASoC core |
| 2322 | * |
| 2323 | * @platform: platform to register |
| 2324 | */ |
| 2325 | int snd_soc_register_platform(struct snd_soc_platform *platform) |
| 2326 | { |
| 2327 | if (!platform->name) |
| 2328 | return -EINVAL; |
| 2329 | |
| 2330 | INIT_LIST_HEAD(&platform->list); |
| 2331 | |
| 2332 | mutex_lock(&client_mutex); |
| 2333 | list_add(&platform->list, &platform_list); |
| 2334 | snd_soc_instantiate_cards(); |
| 2335 | mutex_unlock(&client_mutex); |
| 2336 | |
| 2337 | pr_debug("Registered platform '%s'\n", platform->name); |
| 2338 | |
| 2339 | return 0; |
| 2340 | } |
| 2341 | EXPORT_SYMBOL_GPL(snd_soc_register_platform); |
| 2342 | |
| 2343 | /** |
| 2344 | * snd_soc_unregister_platform - Unregister a platform from the ASoC core |
| 2345 | * |
| 2346 | * @platform: platform to unregister |
| 2347 | */ |
| 2348 | void snd_soc_unregister_platform(struct snd_soc_platform *platform) |
| 2349 | { |
| 2350 | mutex_lock(&client_mutex); |
| 2351 | list_del(&platform->list); |
| 2352 | mutex_unlock(&client_mutex); |
| 2353 | |
| 2354 | pr_debug("Unregistered platform '%s'\n", platform->name); |
| 2355 | } |
| 2356 | EXPORT_SYMBOL_GPL(snd_soc_unregister_platform); |
| 2357 | |
| 2358 | static u64 codec_format_map[] = { |
| 2359 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE, |
| 2360 | SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE, |
| 2361 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE, |
| 2362 | SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE, |
| 2363 | SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, |
| 2364 | SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE, |
| 2365 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, |
| 2366 | SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE, |
| 2367 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE, |
| 2368 | SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE, |
| 2369 | SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE, |
| 2370 | SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE, |
| 2371 | SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE, |
| 2372 | SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE, |
| 2373 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE |
| 2374 | | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE, |
| 2375 | }; |
| 2376 | |
| 2377 | /* Fix up the DAI formats for endianness: codecs don't actually see |
| 2378 | * the endianness of the data but we're using the CPU format |
| 2379 | * definitions which do need to include endianness so we ensure that |
| 2380 | * codec DAIs always have both big and little endian variants set. |
| 2381 | */ |
| 2382 | static void fixup_codec_formats(struct snd_soc_pcm_stream *stream) |
| 2383 | { |
| 2384 | int i; |
| 2385 | |
| 2386 | for (i = 0; i < ARRAY_SIZE(codec_format_map); i++) |
| 2387 | if (stream->formats & codec_format_map[i]) |
| 2388 | stream->formats |= codec_format_map[i]; |
| 2389 | } |
| 2390 | |
| 2391 | /** |
| 2392 | * snd_soc_register_codec - Register a codec with the ASoC core |
| 2393 | * |
| 2394 | * @codec: codec to register |
| 2395 | */ |
| 2396 | int snd_soc_register_codec(struct snd_soc_codec *codec) |
| 2397 | { |
| 2398 | int i; |
| 2399 | |
| 2400 | if (!codec->name) |
| 2401 | return -EINVAL; |
| 2402 | |
| 2403 | /* The device should become mandatory over time */ |
| 2404 | if (!codec->dev) |
| 2405 | printk(KERN_WARNING "No device for codec %s\n", codec->name); |
| 2406 | |
| 2407 | INIT_LIST_HEAD(&codec->list); |
| 2408 | |
| 2409 | for (i = 0; i < codec->num_dai; i++) { |
| 2410 | fixup_codec_formats(&codec->dai[i].playback); |
| 2411 | fixup_codec_formats(&codec->dai[i].capture); |
| 2412 | } |
| 2413 | |
| 2414 | mutex_lock(&client_mutex); |
| 2415 | list_add(&codec->list, &codec_list); |
| 2416 | snd_soc_instantiate_cards(); |
| 2417 | mutex_unlock(&client_mutex); |
| 2418 | |
| 2419 | pr_debug("Registered codec '%s'\n", codec->name); |
| 2420 | |
| 2421 | return 0; |
| 2422 | } |
| 2423 | EXPORT_SYMBOL_GPL(snd_soc_register_codec); |
| 2424 | |
| 2425 | /** |
| 2426 | * snd_soc_unregister_codec - Unregister a codec from the ASoC core |
| 2427 | * |
| 2428 | * @codec: codec to unregister |
| 2429 | */ |
| 2430 | void snd_soc_unregister_codec(struct snd_soc_codec *codec) |
| 2431 | { |
| 2432 | mutex_lock(&client_mutex); |
| 2433 | list_del(&codec->list); |
| 2434 | mutex_unlock(&client_mutex); |
| 2435 | |
| 2436 | pr_debug("Unregistered codec '%s'\n", codec->name); |
| 2437 | } |
| 2438 | EXPORT_SYMBOL_GPL(snd_soc_unregister_codec); |
| 2439 | |
| 2440 | static int __init snd_soc_init(void) |
| 2441 | { |
| 2442 | #ifdef CONFIG_DEBUG_FS |
| 2443 | debugfs_root = debugfs_create_dir("asoc", NULL); |
| 2444 | if (IS_ERR(debugfs_root) || !debugfs_root) { |
| 2445 | printk(KERN_WARNING |
| 2446 | "ASoC: Failed to create debugfs directory\n"); |
| 2447 | debugfs_root = NULL; |
| 2448 | } |
| 2449 | #endif |
| 2450 | |
| 2451 | return platform_driver_register(&soc_driver); |
| 2452 | } |
| 2453 | |
| 2454 | static void __exit snd_soc_exit(void) |
| 2455 | { |
| 2456 | #ifdef CONFIG_DEBUG_FS |
| 2457 | debugfs_remove_recursive(debugfs_root); |
| 2458 | #endif |
| 2459 | platform_driver_unregister(&soc_driver); |
| 2460 | } |
| 2461 | |
| 2462 | module_init(snd_soc_init); |
| 2463 | module_exit(snd_soc_exit); |
| 2464 | |
| 2465 | /* Module information */ |
| 2466 | MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); |
| 2467 | MODULE_DESCRIPTION("ALSA SoC Core"); |
| 2468 | MODULE_LICENSE("GPL"); |
| 2469 | MODULE_ALIAS("platform:soc-audio"); |