| User: | Jiri Slaby |
| Error type: | Double Lock |
| Error type description: | Some lock is locked twice unintentionally in a sequence |
| File location: | sound/core/oss/pcm_oss.c |
| Line in file: | 2875 |
| Project: | Linux Kernel |
| Project version: | 2.6.28 |
| Confirmation: | Fixed by 91054598f794fb5d8a0b1e747ff8e2e8fc2115b3 |
| Tools: |
Stanse
(1.2)
Smatch (1.59) |
| Entered: | 2011-11-07 22:19:59 UTC |
1/* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22#if 0 23#define PLUGIN_DEBUG 24#endif 25#if 0 26#define OSS_DEBUG 27#endif 28 29#include <linux/init.h> 30#include <linux/slab.h> 31#include <linux/time.h> 32#include <linux/vmalloc.h> 33#include <linux/moduleparam.h> 34#include <linux/string.h> 35#include <sound/core.h> 36#include <sound/minors.h> 37#include <sound/pcm.h> 38#include <sound/pcm_params.h> 39#include "pcm_plugin.h" 40#include <sound/info.h> 41#include <linux/soundcard.h> 42#include <sound/initval.h> 43 44#define OSS_ALSAEMULVER _SIOR ('M', 249, int) 45 46static int dsp_map[SNDRV_CARDS]; 47static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 48static int nonblock_open = 1; 49 50MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 51MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 52MODULE_LICENSE("GPL"); 53module_param_array(dsp_map, int, NULL, 0444); 54MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 55module_param_array(adsp_map, int, NULL, 0444); 56MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 57module_param(nonblock_open, bool, 0644); 58MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 59MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 60MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 61 62extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg); 63static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 64static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 65static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 66 67static inline mm_segment_t snd_enter_user(void) 68{ 69 mm_segment_t fs = get_fs(); 70 set_fs(get_ds()); 71 return fs; 72} 73 74static inline void snd_leave_user(mm_segment_t fs) 75{ 76 set_fs(fs); 77} 78 79/* 80 * helper functions to process hw_params 81 */ 82static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 83{ 84 int changed = 0; 85 if (i->min < min) { 86 i->min = min; 87 i->openmin = openmin; 88 changed = 1; 89 } else if (i->min == min && !i->openmin && openmin) { 90 i->openmin = 1; 91 changed = 1; 92 } 93 if (i->integer) { 94 if (i->openmin) { 95 i->min++; 96 i->openmin = 0; 97 } 98 } 99 if (snd_interval_checkempty(i)) { 100 snd_interval_none(i); 101 return -EINVAL; 102 } 103 return changed; 104} 105 106static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 107{ 108 int changed = 0; 109 if (i->max > max) { 110 i->max = max; 111 i->openmax = openmax; 112 changed = 1; 113 } else if (i->max == max && !i->openmax && openmax) { 114 i->openmax = 1; 115 changed = 1; 116 } 117 if (i->integer) { 118 if (i->openmax) { 119 i->max--; 120 i->openmax = 0; 121 } 122 } 123 if (snd_interval_checkempty(i)) { 124 snd_interval_none(i); 125 return -EINVAL; 126 } 127 return changed; 128} 129 130static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 131{ 132 struct snd_interval t; 133 t.empty = 0; 134 t.min = t.max = val; 135 t.openmin = t.openmax = 0; 136 t.integer = 1; 137 return snd_interval_refine(i, &t); 138} 139 140/** 141 * snd_pcm_hw_param_value_min 142 * @params: the hw_params instance 143 * @var: parameter to retrieve 144 * @dir: pointer to the direction (-1,0,1) or NULL 145 * 146 * Return the minimum value for field PAR. 147 */ 148static unsigned int 149snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 150 snd_pcm_hw_param_t var, int *dir) 151{ 152 if (hw_is_mask(var)) { 153 if (dir) 154 *dir = 0; 155 return snd_mask_min(hw_param_mask_c(params, var)); 156 } 157 if (hw_is_interval(var)) { 158 const struct snd_interval *i = hw_param_interval_c(params, var); 159 if (dir) 160 *dir = i->openmin; 161 return snd_interval_min(i); 162 } 163 return -EINVAL; 164} 165 166/** 167 * snd_pcm_hw_param_value_max 168 * @params: the hw_params instance 169 * @var: parameter to retrieve 170 * @dir: pointer to the direction (-1,0,1) or NULL 171 * 172 * Return the maximum value for field PAR. 173 */ 174static unsigned int 175snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 176 snd_pcm_hw_param_t var, int *dir) 177{ 178 if (hw_is_mask(var)) { 179 if (dir) 180 *dir = 0; 181 return snd_mask_max(hw_param_mask_c(params, var)); 182 } 183 if (hw_is_interval(var)) { 184 const struct snd_interval *i = hw_param_interval_c(params, var); 185 if (dir) 186 *dir = - (int) i->openmax; 187 return snd_interval_max(i); 188 } 189 return -EINVAL; 190} 191 192static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 193 snd_pcm_hw_param_t var, 194 const struct snd_mask *val) 195{ 196 int changed; 197 changed = snd_mask_refine(hw_param_mask(params, var), val); 198 if (changed) { 199 params->cmask |= 1 << var; 200 params->rmask |= 1 << var; 201 } 202 return changed; 203} 204 205static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 206 struct snd_pcm_hw_params *params, 207 snd_pcm_hw_param_t var, 208 const struct snd_mask *val) 209{ 210 int changed = _snd_pcm_hw_param_mask(params, var, val); 211 if (changed < 0) 212 return changed; 213 if (params->rmask) { 214 int err = snd_pcm_hw_refine(pcm, params); 215 if (err < 0) 216 return err; 217 } 218 return 0; 219} 220 221static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 222 snd_pcm_hw_param_t var, unsigned int val, 223 int dir) 224{ 225 int changed; 226 int open = 0; 227 if (dir) { 228 if (dir > 0) { 229 open = 1; 230 } else if (dir < 0) { 231 if (val > 0) { 232 open = 1; 233 val--; 234 } 235 } 236 } 237 if (hw_is_mask(var)) 238 changed = snd_mask_refine_min(hw_param_mask(params, var), 239 val + !!open); 240 else if (hw_is_interval(var)) 241 changed = snd_interval_refine_min(hw_param_interval(params, var), 242 val, open); 243 else 244 return -EINVAL; 245 if (changed) { 246 params->cmask |= 1 << var; 247 params->rmask |= 1 << var; 248 } 249 return changed; 250} 251 252/** 253 * snd_pcm_hw_param_min 254 * @pcm: PCM instance 255 * @params: the hw_params instance 256 * @var: parameter to retrieve 257 * @val: minimal value 258 * @dir: pointer to the direction (-1,0,1) or NULL 259 * 260 * Inside configuration space defined by PARAMS remove from PAR all 261 * values < VAL. Reduce configuration space accordingly. 262 * Return new minimum or -EINVAL if the configuration space is empty 263 */ 264static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 265 struct snd_pcm_hw_params *params, 266 snd_pcm_hw_param_t var, unsigned int val, 267 int *dir) 268{ 269 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 270 if (changed < 0) 271 return changed; 272 if (params->rmask) { 273 int err = snd_pcm_hw_refine(pcm, params); 274 if (err < 0) 275 return err; 276 } 277 return snd_pcm_hw_param_value_min(params, var, dir); 278} 279 280static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 281 snd_pcm_hw_param_t var, unsigned int val, 282 int dir) 283{ 284 int changed; 285 int open = 0; 286 if (dir) { 287 if (dir < 0) { 288 open = 1; 289 } else if (dir > 0) { 290 open = 1; 291 val++; 292 } 293 } 294 if (hw_is_mask(var)) { 295 if (val == 0 && open) { 296 snd_mask_none(hw_param_mask(params, var)); 297 changed = -EINVAL; 298 } else 299 changed = snd_mask_refine_max(hw_param_mask(params, var), 300 val - !!open); 301 } else if (hw_is_interval(var)) 302 changed = snd_interval_refine_max(hw_param_interval(params, var), 303 val, open); 304 else 305 return -EINVAL; 306 if (changed) { 307 params->cmask |= 1 << var; 308 params->rmask |= 1 << var; 309 } 310 return changed; 311} 312 313/** 314 * snd_pcm_hw_param_max 315 * @pcm: PCM instance 316 * @params: the hw_params instance 317 * @var: parameter to retrieve 318 * @val: maximal value 319 * @dir: pointer to the direction (-1,0,1) or NULL 320 * 321 * Inside configuration space defined by PARAMS remove from PAR all 322 * values >= VAL + 1. Reduce configuration space accordingly. 323 * Return new maximum or -EINVAL if the configuration space is empty 324 */ 325static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 326 struct snd_pcm_hw_params *params, 327 snd_pcm_hw_param_t var, unsigned int val, 328 int *dir) 329{ 330 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 331 if (changed < 0) 332 return changed; 333 if (params->rmask) { 334 int err = snd_pcm_hw_refine(pcm, params); 335 if (err < 0) 336 return err; 337 } 338 return snd_pcm_hw_param_value_max(params, var, dir); 339} 340 341static int boundary_sub(int a, int adir, 342 int b, int bdir, 343 int *c, int *cdir) 344{ 345 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 346 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 347 *c = a - b; 348 *cdir = adir - bdir; 349 if (*cdir == -2) { 350 (*c)--; 351 } else if (*cdir == 2) { 352 (*c)++; 353 } 354 return 0; 355} 356 357static int boundary_lt(unsigned int a, int adir, 358 unsigned int b, int bdir) 359{ 360 if (adir < 0) { 361 a--; 362 adir = 1; 363 } else if (adir > 0) 364 adir = 1; 365 if (bdir < 0) { 366 b--; 367 bdir = 1; 368 } else if (bdir > 0) 369 bdir = 1; 370 return a < b || (a == b && adir < bdir); 371} 372 373/* Return 1 if min is nearer to best than max */ 374static int boundary_nearer(int min, int mindir, 375 int best, int bestdir, 376 int max, int maxdir) 377{ 378 int dmin, dmindir; 379 int dmax, dmaxdir; 380 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 381 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 382 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 383} 384 385/** 386 * snd_pcm_hw_param_near 387 * @pcm: PCM instance 388 * @params: the hw_params instance 389 * @var: parameter to retrieve 390 * @best: value to set 391 * @dir: pointer to the direction (-1,0,1) or NULL 392 * 393 * Inside configuration space defined by PARAMS set PAR to the available value 394 * nearest to VAL. Reduce configuration space accordingly. 395 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 396 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 397 * Return the value found. 398 */ 399static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 400 struct snd_pcm_hw_params *params, 401 snd_pcm_hw_param_t var, unsigned int best, 402 int *dir) 403{ 404 struct snd_pcm_hw_params *save = NULL; 405 int v; 406 unsigned int saved_min; 407 int last = 0; 408 int min, max; 409 int mindir, maxdir; 410 int valdir = dir ? *dir : 0; 411 /* FIXME */ 412 if (best > INT_MAX) 413 best = INT_MAX; 414 min = max = best; 415 mindir = maxdir = valdir; 416 if (maxdir > 0) 417 maxdir = 0; 418 else if (maxdir == 0) 419 maxdir = -1; 420 else { 421 maxdir = 1; 422 max--; 423 } 424 save = kmalloc(sizeof(*save), GFP_KERNEL); 425 if (save == NULL) 426 return -ENOMEM; 427 *save = *params; 428 saved_min = min; 429 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 430 if (min >= 0) { 431 struct snd_pcm_hw_params *params1; 432 if (max < 0) 433 goto _end; 434 if ((unsigned int)min == saved_min && mindir == valdir) 435 goto _end; 436 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 437 if (params1 == NULL) { 438 kfree(save); 439 return -ENOMEM; 440 } 441 *params1 = *save; 442 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 443 if (max < 0) { 444 kfree(params1); 445 goto _end; 446 } 447 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 448 *params = *params1; 449 last = 1; 450 } 451 kfree(params1); 452 } else { 453 *params = *save; 454 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 455 if (max < 0) 456 return max; 457 last = 1; 458 } 459 _end: 460 kfree(save); 461 if (last) 462 v = snd_pcm_hw_param_last(pcm, params, var, dir); 463 else 464 v = snd_pcm_hw_param_first(pcm, params, var, dir); 465 snd_BUG_ON(v < 0); 466 return v; 467} 468 469static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 470 snd_pcm_hw_param_t var, unsigned int val, 471 int dir) 472{ 473 int changed; 474 if (hw_is_mask(var)) { 475 struct snd_mask *m = hw_param_mask(params, var); 476 if (val == 0 && dir < 0) { 477 changed = -EINVAL; 478 snd_mask_none(m); 479 } else { 480 if (dir > 0) 481 val++; 482 else if (dir < 0) 483 val--; 484 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 485 } 486 } else if (hw_is_interval(var)) { 487 struct snd_interval *i = hw_param_interval(params, var); 488 if (val == 0 && dir < 0) { 489 changed = -EINVAL; 490 snd_interval_none(i); 491 } else if (dir == 0) 492 changed = snd_interval_refine_set(i, val); 493 else { 494 struct snd_interval t; 495 t.openmin = 1; 496 t.openmax = 1; 497 t.empty = 0; 498 t.integer = 0; 499 if (dir < 0) { 500 t.min = val - 1; 501 t.max = val; 502 } else { 503 t.min = val; 504 t.max = val+1; 505 } 506 changed = snd_interval_refine(i, &t); 507 } 508 } else 509 return -EINVAL; 510 if (changed) { 511 params->cmask |= 1 << var; 512 params->rmask |= 1 << var; 513 } 514 return changed; 515} 516 517/** 518 * snd_pcm_hw_param_set 519 * @pcm: PCM instance 520 * @params: the hw_params instance 521 * @var: parameter to retrieve 522 * @val: value to set 523 * @dir: pointer to the direction (-1,0,1) or NULL 524 * 525 * Inside configuration space defined by PARAMS remove from PAR all 526 * values != VAL. Reduce configuration space accordingly. 527 * Return VAL or -EINVAL if the configuration space is empty 528 */ 529static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 530 struct snd_pcm_hw_params *params, 531 snd_pcm_hw_param_t var, unsigned int val, 532 int dir) 533{ 534 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 535 if (changed < 0) 536 return changed; 537 if (params->rmask) { 538 int err = snd_pcm_hw_refine(pcm, params); 539 if (err < 0) 540 return err; 541 } 542 return snd_pcm_hw_param_value(params, var, NULL); 543} 544 545static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 546 snd_pcm_hw_param_t var) 547{ 548 int changed; 549 changed = snd_interval_setinteger(hw_param_interval(params, var)); 550 if (changed) { 551 params->cmask |= 1 << var; 552 params->rmask |= 1 << var; 553 } 554 return changed; 555} 556 557/* 558 * plugin 559 */ 560 561#ifdef CONFIG_SND_PCM_OSS_PLUGINS 562static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 563{ 564 struct snd_pcm_runtime *runtime = substream->runtime; 565 struct snd_pcm_plugin *plugin, *next; 566 567 plugin = runtime->oss.plugin_first; 568 while (plugin) { 569 next = plugin->next; 570 snd_pcm_plugin_free(plugin); 571 plugin = next; 572 } 573 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 574 return 0; 575} 576 577static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 578{ 579 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 580 plugin->next = runtime->oss.plugin_first; 581 plugin->prev = NULL; 582 if (runtime->oss.plugin_first) { 583 runtime->oss.plugin_first->prev = plugin; 584 runtime->oss.plugin_first = plugin; 585 } else { 586 runtime->oss.plugin_last = 587 runtime->oss.plugin_first = plugin; 588 } 589 return 0; 590} 591 592int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 593{ 594 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 595 plugin->next = NULL; 596 plugin->prev = runtime->oss.plugin_last; 597 if (runtime->oss.plugin_last) { 598 runtime->oss.plugin_last->next = plugin; 599 runtime->oss.plugin_last = plugin; 600 } else { 601 runtime->oss.plugin_last = 602 runtime->oss.plugin_first = plugin; 603 } 604 return 0; 605} 606#endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 607 608static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 609{ 610 struct snd_pcm_runtime *runtime = substream->runtime; 611 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 612 long bytes = frames_to_bytes(runtime, frames); 613 if (buffer_size == runtime->oss.buffer_bytes) 614 return bytes; 615#if BITS_PER_LONG >= 64 616 return runtime->oss.buffer_bytes * bytes / buffer_size; 617#else 618 { 619 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 620 u32 rem; 621 div64_32(&bsize, buffer_size, &rem); 622 return (long)bsize; 623 } 624#endif 625} 626 627static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 628{ 629 struct snd_pcm_runtime *runtime = substream->runtime; 630 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 631 if (buffer_size == runtime->oss.buffer_bytes) 632 return bytes_to_frames(runtime, bytes); 633 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 634} 635 636/* define extended formats in the recent OSS versions (if any) */ 637/* linear formats */ 638#define AFMT_S32_LE 0x00001000 639#define AFMT_S32_BE 0x00002000 640#define AFMT_S24_LE 0x00008000 641#define AFMT_S24_BE 0x00010000 642#define AFMT_S24_PACKED 0x00040000 643 644/* other supported formats */ 645#define AFMT_FLOAT 0x00004000 646#define AFMT_SPDIF_RAW 0x00020000 647 648/* unsupported formats */ 649#define AFMT_AC3 0x00000400 650#define AFMT_VORBIS 0x00000800 651 652static int snd_pcm_oss_format_from(int format) 653{ 654 switch (format) { 655 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 656 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 657 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 658 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 659 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 660 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 661 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 662 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 663 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 664 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 665 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 666 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 667 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 668 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 669 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 670 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 671 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 672 default: return SNDRV_PCM_FORMAT_U8; 673 } 674} 675 676static int snd_pcm_oss_format_to(int format) 677{ 678 switch (format) { 679 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 680 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 681 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 682 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 683 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 684 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 685 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 686 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 687 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 688 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 689 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 690 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 691 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 692 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 693 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 694 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 695 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 696 default: return -EINVAL; 697 } 698} 699 700static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 701 struct snd_pcm_hw_params *oss_params, 702 struct snd_pcm_hw_params *slave_params) 703{ 704 size_t s; 705 size_t oss_buffer_size, oss_period_size, oss_periods; 706 size_t min_period_size, max_period_size; 707 struct snd_pcm_runtime *runtime = substream->runtime; 708 size_t oss_frame_size; 709 710 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 711 params_channels(oss_params) / 8; 712 713 oss_buffer_size = snd_pcm_plug_client_size(substream, 714 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 715 oss_buffer_size = 1 << ld2(oss_buffer_size); 716 if (atomic_read(&substream->mmap_count)) { 717 if (oss_buffer_size > runtime->oss.mmap_bytes) 718 oss_buffer_size = runtime->oss.mmap_bytes; 719 } 720 721 if (substream->oss.setup.period_size > 16) 722 oss_period_size = substream->oss.setup.period_size; 723 else if (runtime->oss.fragshift) { 724 oss_period_size = 1 << runtime->oss.fragshift; 725 if (oss_period_size > oss_buffer_size / 2) 726 oss_period_size = oss_buffer_size / 2; 727 } else { 728 int sd; 729 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 730 731 oss_period_size = oss_buffer_size; 732 do { 733 oss_period_size /= 2; 734 } while (oss_period_size > bytes_per_sec); 735 if (runtime->oss.subdivision == 0) { 736 sd = 4; 737 if (oss_period_size / sd > 4096) 738 sd *= 2; 739 if (oss_period_size / sd < 4096) 740 sd = 1; 741 } else 742 sd = runtime->oss.subdivision; 743 oss_period_size /= sd; 744 if (oss_period_size < 16) 745 oss_period_size = 16; 746 } 747 748 min_period_size = snd_pcm_plug_client_size(substream, 749 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 750 min_period_size *= oss_frame_size; 751 min_period_size = 1 << (ld2(min_period_size - 1) + 1); 752 if (oss_period_size < min_period_size) 753 oss_period_size = min_period_size; 754 755 max_period_size = snd_pcm_plug_client_size(substream, 756 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 757 max_period_size *= oss_frame_size; 758 max_period_size = 1 << ld2(max_period_size); 759 if (oss_period_size > max_period_size) 760 oss_period_size = max_period_size; 761 762 oss_periods = oss_buffer_size / oss_period_size; 763 764 if (substream->oss.setup.periods > 1) 765 oss_periods = substream->oss.setup.periods; 766 767 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 768 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 769 s = runtime->oss.maxfrags; 770 if (oss_periods > s) 771 oss_periods = s; 772 773 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 774 if (s < 2) 775 s = 2; 776 if (oss_periods < s) 777 oss_periods = s; 778 779 while (oss_period_size * oss_periods > oss_buffer_size) 780 oss_period_size /= 2; 781 782 if (oss_period_size < 16) 783 return -EINVAL; 784 runtime->oss.period_bytes = oss_period_size; 785 runtime->oss.period_frames = 1; 786 runtime->oss.periods = oss_periods; 787 return 0; 788} 789 790static int choose_rate(struct snd_pcm_substream *substream, 791 struct snd_pcm_hw_params *params, unsigned int best_rate) 792{ 793 struct snd_interval *it; 794 struct snd_pcm_hw_params *save; 795 unsigned int rate, prev; 796 797 save = kmalloc(sizeof(*save), GFP_KERNEL); 798 if (save == NULL) 799 return -ENOMEM; 800 *save = *params; 801 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 802 803 /* try multiples of the best rate */ 804 rate = best_rate; 805 for (;;) { 806 if (it->max < rate || (it->max == rate && it->openmax)) 807 break; 808 if (it->min < rate || (it->min == rate && !it->openmin)) { 809 int ret; 810 ret = snd_pcm_hw_param_set(substream, params, 811 SNDRV_PCM_HW_PARAM_RATE, 812 rate, 0); 813 if (ret == (int)rate) { 814 kfree(save); 815 return rate; 816 } 817 *params = *save; 818 } 819 prev = rate; 820 rate += best_rate; 821 if (rate <= prev) 822 break; 823 } 824 825 /* not found, use the nearest rate */ 826 kfree(save); 827 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 828} 829 830static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 831{ 832 struct snd_pcm_runtime *runtime = substream->runtime; 833 struct snd_pcm_hw_params *params, *sparams; 834 struct snd_pcm_sw_params *sw_params; 835 ssize_t oss_buffer_size, oss_period_size; 836 size_t oss_frame_size; 837 int err; 838 int direct; 839 int format, sformat, n; 840 struct snd_mask sformat_mask; 841 struct snd_mask mask; 842 843 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 844 return -EINTR; 845 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 846 params = kmalloc(sizeof(*params), GFP_KERNEL); 847 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 848 if (!sw_params || !params || !sparams) { 849 snd_printd("No memory\n"); 850 err = -ENOMEM; 851 goto failure; 852 } 853 854 if (atomic_read(&substream->mmap_count)) 855 direct = 1; 856 else 857 direct = substream->oss.setup.direct; 858 859 _snd_pcm_hw_params_any(sparams); 860 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 861 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 862 snd_mask_none(&mask); 863 if (atomic_read(&substream->mmap_count)) 864 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 865 else { 866 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); 867 if (!direct) 868 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 869 } 870 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 871 if (err < 0) { 872 snd_printd("No usable accesses\n"); 873 err = -EINVAL; 874 goto failure; 875 } 876 choose_rate(substream, sparams, runtime->oss.rate); 877 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 878 879 format = snd_pcm_oss_format_from(runtime->oss.format); 880 881 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 882 if (direct) 883 sformat = format; 884 else 885 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 886 887 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { 888 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { 889 if (snd_mask_test(&sformat_mask, sformat) && 890 snd_pcm_oss_format_to(sformat) >= 0) 891 break; 892 } 893 if (sformat > SNDRV_PCM_FORMAT_LAST) { 894 snd_printd("Cannot find a format!!!\n"); 895 err = -EINVAL; 896 goto failure; 897 } 898 } 899 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); 900 if (err < 0) 901 goto failure; 902 903 if (direct) { 904 memcpy(params, sparams, sizeof(*params)); 905 } else { 906 _snd_pcm_hw_params_any(params); 907 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 908 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 910 snd_pcm_oss_format_from(runtime->oss.format), 0); 911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 912 runtime->oss.channels, 0); 913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 914 runtime->oss.rate, 0); 915 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 916 params_access(params), params_format(params), 917 params_channels(params), params_rate(params)); 918 } 919 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 920 params_access(sparams), params_format(sparams), 921 params_channels(sparams), params_rate(sparams)); 922 923 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 924 params_channels(params) / 8; 925 926#ifdef CONFIG_SND_PCM_OSS_PLUGINS 927 snd_pcm_oss_plugin_clear(substream); 928 if (!direct) { 929 /* add necessary plugins */ 930 snd_pcm_oss_plugin_clear(substream); 931 if ((err = snd_pcm_plug_format_plugins(substream, 932 params, 933 sparams)) < 0) { 934 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); 935 snd_pcm_oss_plugin_clear(substream); 936 goto failure; 937 } 938 if (runtime->oss.plugin_first) { 939 struct snd_pcm_plugin *plugin; 940 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 941 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 942 snd_pcm_oss_plugin_clear(substream); 943 goto failure; 944 } 945 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 946 err = snd_pcm_plugin_append(plugin); 947 } else { 948 err = snd_pcm_plugin_insert(plugin); 949 } 950 if (err < 0) { 951 snd_pcm_oss_plugin_clear(substream); 952 goto failure; 953 } 954 } 955 } 956#endif 957 958 err = snd_pcm_oss_period_size(substream, params, sparams); 959 if (err < 0) 960 goto failure; 961 962 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 963 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 964 if (err < 0) 965 goto failure; 966 967 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 968 runtime->oss.periods, NULL); 969 if (err < 0) 970 goto failure; 971 972 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 973 974 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 975 snd_printd("HW_PARAMS failed: %i\n", err); 976 goto failure; 977 } 978 979 memset(sw_params, 0, sizeof(*sw_params)); 980 if (runtime->oss.trigger) { 981 sw_params->start_threshold = 1; 982 } else { 983 sw_params->start_threshold = runtime->boundary; 984 } 985 if (atomic_read(&substream->mmap_count) || 986 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 987 sw_params->stop_threshold = runtime->boundary; 988 else 989 sw_params->stop_threshold = runtime->buffer_size; 990 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 991 sw_params->period_step = 1; 992 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 993 1 : runtime->period_size; 994 if (atomic_read(&substream->mmap_count) || 995 substream->oss.setup.nosilence) { 996 sw_params->silence_threshold = 0; 997 sw_params->silence_size = 0; 998 } else { 999 snd_pcm_uframes_t frames; 1000 frames = runtime->period_size + 16; 1001 if (frames > runtime->buffer_size) 1002 frames = runtime->buffer_size; 1003 sw_params->silence_threshold = frames; 1004 sw_params->silence_size = frames; 1005 } 1006 1007 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1008 snd_printd("SW_PARAMS failed: %i\n", err); 1009 goto failure; 1010 } 1011 1012 runtime->oss.periods = params_periods(sparams); 1013 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1014 if (oss_period_size < 0) { 1015 err = -EINVAL; 1016 goto failure; 1017 } 1018#ifdef CONFIG_SND_PCM_OSS_PLUGINS 1019 if (runtime->oss.plugin_first) { 1020 err = snd_pcm_plug_alloc(substream, oss_period_size); 1021 if (err < 0) 1022 goto failure; 1023 } 1024#endif 1025 oss_period_size *= oss_frame_size; 1026 1027 oss_buffer_size = oss_period_size * runtime->oss.periods; 1028 if (oss_buffer_size < 0) { 1029 err = -EINVAL; 1030 goto failure; 1031 } 1032 1033 runtime->oss.period_bytes = oss_period_size; 1034 runtime->oss.buffer_bytes = oss_buffer_size; 1035 1036 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1037 runtime->oss.period_bytes, 1038 runtime->oss.buffer_bytes); 1039 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1040 params_period_size(sparams), 1041 params_buffer_size(sparams)); 1042 1043 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1044 runtime->oss.channels = params_channels(params); 1045 runtime->oss.rate = params_rate(params); 1046 1047 runtime->oss.params = 0; 1048 runtime->oss.prepare = 1; 1049 vfree(runtime->oss.buffer); 1050 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1051 runtime->oss.buffer_used = 0; 1052 if (runtime->dma_area) 1053 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1054 1055 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1056 1057 err = 0; 1058failure: 1059 kfree(sw_params); 1060 kfree(params); 1061 kfree(sparams); 1062 mutex_unlock(&runtime->oss.params_lock); 1063 return err; 1064} 1065 1066static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1067{ 1068 int idx, err; 1069 struct snd_pcm_substream *asubstream = NULL, *substream; 1070 1071 for (idx = 0; idx < 2; idx++) { 1072 substream = pcm_oss_file->streams[idx]; 1073 if (substream == NULL) 1074 continue; 1075 if (asubstream == NULL) 1076 asubstream = substream; 1077 if (substream->runtime->oss.params) { 1078 err = snd_pcm_oss_change_params(substream); 1079 if (err < 0) 1080 return err; 1081 } 1082 } 1083 if (!asubstream) 1084 return -EIO; 1085 if (r_substream) 1086 *r_substream = asubstream; 1087 return 0; 1088} 1089 1090static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1091{ 1092 int err; 1093 struct snd_pcm_runtime *runtime = substream->runtime; 1094 1095 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1096 if (err < 0) { 1097 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1098 return err; 1099 } 1100 runtime->oss.prepare = 0; 1101 runtime->oss.prev_hw_ptr_interrupt = 0; 1102 runtime->oss.period_ptr = 0; 1103 runtime->oss.buffer_used = 0; 1104 1105 return 0; 1106} 1107 1108static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1109{ 1110 struct snd_pcm_runtime *runtime; 1111 int err; 1112 1113 if (substream == NULL) 1114 return 0; 1115 runtime = substream->runtime; 1116 if (runtime->oss.params) { 1117 err = snd_pcm_oss_change_params(substream); 1118 if (err < 0) 1119 return err; 1120 } 1121 if (runtime->oss.prepare) { 1122 err = snd_pcm_oss_prepare(substream); 1123 if (err < 0) 1124 return err; 1125 } 1126 return 0; 1127} 1128 1129static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1130{ 1131 struct snd_pcm_runtime *runtime; 1132 snd_pcm_uframes_t frames; 1133 int err = 0; 1134 1135 while (1) { 1136 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1137 if (err < 0) 1138 break; 1139 runtime = substream->runtime; 1140 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1141 break; 1142 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1143 /* until avail(delay) <= buffer_size */ 1144 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1145 frames /= runtime->period_size; 1146 frames *= runtime->period_size; 1147 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1148 if (err < 0) 1149 break; 1150 } 1151 return err; 1152} 1153 1154snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1155{ 1156 struct snd_pcm_runtime *runtime = substream->runtime; 1157 int ret; 1158 while (1) { 1159 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1160 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1161#ifdef OSS_DEBUG 1162 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1163 printk("pcm_oss: write: recovering from XRUN\n"); 1164 else 1165 printk("pcm_oss: write: recovering from SUSPEND\n"); 1166#endif 1167 ret = snd_pcm_oss_prepare(substream); 1168 if (ret < 0) 1169 break; 1170 } 1171 if (in_kernel) { 1172 mm_segment_t fs; 1173 fs = snd_enter_user(); 1174 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1175 snd_leave_user(fs); 1176 } else { 1177 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1178 } 1179 if (ret != -EPIPE && ret != -ESTRPIPE) 1180 break; 1181 /* test, if we can't store new data, because the stream */ 1182 /* has not been started */ 1183 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1184 return -EAGAIN; 1185 } 1186 return ret; 1187} 1188 1189snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1190{ 1191 struct snd_pcm_runtime *runtime = substream->runtime; 1192 snd_pcm_sframes_t delay; 1193 int ret; 1194 while (1) { 1195 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1196 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1197#ifdef OSS_DEBUG 1198 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1199 printk("pcm_oss: read: recovering from XRUN\n"); 1200 else 1201 printk("pcm_oss: read: recovering from SUSPEND\n"); 1202#endif 1203 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1204 if (ret < 0) 1205 break; 1206 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1207 ret = snd_pcm_oss_prepare(substream); 1208 if (ret < 0) 1209 break; 1210 } 1211 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1212 if (ret < 0) 1213 break; 1214 if (in_kernel) { 1215 mm_segment_t fs; 1216 fs = snd_enter_user(); 1217 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1218 snd_leave_user(fs); 1219 } else { 1220 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1221 } 1222 if (ret == -EPIPE) { 1223 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1224 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1225 if (ret < 0) 1226 break; 1227 } 1228 continue; 1229 } 1230 if (ret != -ESTRPIPE) 1231 break; 1232 } 1233 return ret; 1234} 1235 1236snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1237{ 1238 struct snd_pcm_runtime *runtime = substream->runtime; 1239 int ret; 1240 while (1) { 1241 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1242 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1243#ifdef OSS_DEBUG 1244 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1245 printk("pcm_oss: writev: recovering from XRUN\n"); 1246 else 1247 printk("pcm_oss: writev: recovering from SUSPEND\n"); 1248#endif 1249 ret = snd_pcm_oss_prepare(substream); 1250 if (ret < 0) 1251 break; 1252 } 1253 if (in_kernel) { 1254 mm_segment_t fs; 1255 fs = snd_enter_user(); 1256 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1257 snd_leave_user(fs); 1258 } else { 1259 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1260 } 1261 if (ret != -EPIPE && ret != -ESTRPIPE) 1262 break; 1263 1264 /* test, if we can't store new data, because the stream */ 1265 /* has not been started */ 1266 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1267 return -EAGAIN; 1268 } 1269 return ret; 1270} 1271 1272snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1273{ 1274 struct snd_pcm_runtime *runtime = substream->runtime; 1275 int ret; 1276 while (1) { 1277 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1278 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1279#ifdef OSS_DEBUG 1280 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1281 printk("pcm_oss: readv: recovering from XRUN\n"); 1282 else 1283 printk("pcm_oss: readv: recovering from SUSPEND\n"); 1284#endif 1285 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1286 if (ret < 0) 1287 break; 1288 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1289 ret = snd_pcm_oss_prepare(substream); 1290 if (ret < 0) 1291 break; 1292 } 1293 if (in_kernel) { 1294 mm_segment_t fs; 1295 fs = snd_enter_user(); 1296 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1297 snd_leave_user(fs); 1298 } else { 1299 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1300 } 1301 if (ret != -EPIPE && ret != -ESTRPIPE) 1302 break; 1303 } 1304 return ret; 1305} 1306 1307static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1308{ 1309 struct snd_pcm_runtime *runtime = substream->runtime; 1310 snd_pcm_sframes_t frames, frames1; 1311#ifdef CONFIG_SND_PCM_OSS_PLUGINS 1312 if (runtime->oss.plugin_first) { 1313 struct snd_pcm_plugin_channel *channels; 1314 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1315 if (!in_kernel) { 1316 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) 1317 return -EFAULT; 1318 buf = runtime->oss.buffer; 1319 } 1320 frames = bytes / oss_frame_bytes; 1321 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1322 if (frames1 < 0) 1323 return frames1; 1324 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1325 if (frames1 <= 0) 1326 return frames1; 1327 bytes = frames1 * oss_frame_bytes; 1328 } else 1329#endif 1330 { 1331 frames = bytes_to_frames(runtime, bytes); 1332 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1333 if (frames1 <= 0) 1334 return frames1; 1335 bytes = frames_to_bytes(runtime, frames1); 1336 } 1337 return bytes; 1338} 1339 1340static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1341{ 1342 size_t xfer = 0; 1343 ssize_t tmp; 1344 struct snd_pcm_runtime *runtime = substream->runtime; 1345 1346 if (atomic_read(&substream->mmap_count)) 1347 return -ENXIO; 1348 1349 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1350 return tmp; 1351 mutex_lock(&runtime->oss.params_lock); 1352 while (bytes > 0) { 1353 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1354 tmp = bytes; 1355 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1356 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1357 if (tmp > 0) { 1358 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1359 tmp = -EFAULT; 1360 goto err; 1361 } 1362 } 1363 runtime->oss.buffer_used += tmp; 1364 buf += tmp; 1365 bytes -= tmp; 1366 xfer += tmp; 1367 if (substream->oss.setup.partialfrag || 1368 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1369 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1370 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1371 if (tmp <= 0) 1372 goto err; 1373 runtime->oss.bytes += tmp; 1374 runtime->oss.period_ptr += tmp; 1375 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1376 if (runtime->oss.period_ptr == 0 || 1377 runtime->oss.period_ptr == runtime->oss.buffer_used) 1378 runtime->oss.buffer_used = 0; 1379 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1380 tmp = -EAGAIN; 1381 goto err; 1382 } 1383 } 1384 } else { 1385 tmp = snd_pcm_oss_write2(substream, 1386 (const char __force *)buf, 1387 runtime->oss.period_bytes, 0); 1388 if (tmp <= 0) 1389 goto err; 1390 runtime->oss.bytes += tmp; 1391 buf += tmp; 1392 bytes -= tmp; 1393 xfer += tmp; 1394 if ((substream->f_flags & O_NONBLOCK) != 0 && 1395 tmp != runtime->oss.period_bytes) 1396 break; 1397 } 1398 } 1399 mutex_unlock(&runtime->oss.params_lock); 1400 return xfer; 1401 1402 err: 1403 mutex_unlock(&runtime->oss.params_lock); 1404 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1405} 1406 1407static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1408{ 1409 struct snd_pcm_runtime *runtime = substream->runtime; 1410 snd_pcm_sframes_t frames, frames1; 1411#ifdef CONFIG_SND_PCM_OSS_PLUGINS 1412 char __user *final_dst = (char __user *)buf; 1413 if (runtime->oss.plugin_first) { 1414 struct snd_pcm_plugin_channel *channels; 1415 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1416 if (!in_kernel) 1417 buf = runtime->oss.buffer; 1418 frames = bytes / oss_frame_bytes; 1419 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1420 if (frames1 < 0) 1421 return frames1; 1422 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1423 if (frames1 <= 0) 1424 return frames1; 1425 bytes = frames1 * oss_frame_bytes; 1426 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1427 return -EFAULT; 1428 } else 1429#endif 1430 { 1431 frames = bytes_to_frames(runtime, bytes); 1432 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1433 if (frames1 <= 0) 1434 return frames1; 1435 bytes = frames_to_bytes(runtime, frames1); 1436 } 1437 return bytes; 1438} 1439 1440static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1441{ 1442 size_t xfer = 0; 1443 ssize_t tmp; 1444 struct snd_pcm_runtime *runtime = substream->runtime; 1445 1446 if (atomic_read(&substream->mmap_count)) 1447 return -ENXIO; 1448 1449 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1450 return tmp; 1451 mutex_lock(&runtime->oss.params_lock); 1452 while (bytes > 0) { 1453 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1454 if (runtime->oss.buffer_used == 0) { 1455 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1456 if (tmp <= 0) 1457 goto err; 1458 runtime->oss.bytes += tmp; 1459 runtime->oss.period_ptr = tmp; 1460 runtime->oss.buffer_used = tmp; 1461 } 1462 tmp = bytes; 1463 if ((size_t) tmp > runtime->oss.buffer_used) 1464 tmp = runtime->oss.buffer_used; 1465 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1466 tmp = -EFAULT; 1467 goto err; 1468 } 1469 buf += tmp; 1470 bytes -= tmp; 1471 xfer += tmp; 1472 runtime->oss.buffer_used -= tmp; 1473 } else { 1474 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1475 runtime->oss.period_bytes, 0); 1476 if (tmp <= 0) 1477 goto err; 1478 runtime->oss.bytes += tmp; 1479 buf += tmp; 1480 bytes -= tmp; 1481 xfer += tmp; 1482 } 1483 } 1484 mutex_unlock(&runtime->oss.params_lock); 1485 return xfer; 1486 1487 err: 1488 mutex_unlock(&runtime->oss.params_lock); 1489 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1490} 1491 1492static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1493{ 1494 struct snd_pcm_substream *substream; 1495 1496 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1497 if (substream != NULL) { 1498 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1499 substream->runtime->oss.prepare = 1; 1500 } 1501 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1502 if (substream != NULL) { 1503 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1504 substream->runtime->oss.prepare = 1; 1505 } 1506 return 0; 1507} 1508 1509static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1510{ 1511 struct snd_pcm_substream *substream; 1512 int err; 1513 1514 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1515 if (substream != NULL) { 1516 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1517 return err; 1518 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1519 } 1520 /* note: all errors from the start action are ignored */ 1521 /* OSS apps do not know, how to handle them */ 1522 return 0; 1523} 1524 1525static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1526{ 1527 struct snd_pcm_runtime *runtime; 1528 ssize_t result = 0; 1529 long res; 1530 wait_queue_t wait; 1531 1532 runtime = substream->runtime; 1533 init_waitqueue_entry(&wait, current); 1534 add_wait_queue(&runtime->sleep, &wait); 1535#ifdef OSS_DEBUG 1536 printk("sync1: size = %li\n", size); 1537#endif 1538 while (1) { 1539 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1540 if (result > 0) { 1541 runtime->oss.buffer_used = 0; 1542 result = 0; 1543 break; 1544 } 1545 if (result != 0 && result != -EAGAIN) 1546 break; 1547 result = 0; 1548 set_current_state(TASK_INTERRUPTIBLE); 1549 snd_pcm_stream_lock_irq(substream); 1550 res = runtime->status->state; 1551 snd_pcm_stream_unlock_irq(substream); 1552 if (res != SNDRV_PCM_STATE_RUNNING) { 1553 set_current_state(TASK_RUNNING); 1554 break; 1555 } 1556 res = schedule_timeout(10 * HZ); 1557 if (signal_pending(current)) { 1558 result = -ERESTARTSYS; 1559 break; 1560 } 1561 if (res == 0) { 1562 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1563 result = -EIO; 1564 break; 1565 } 1566 } 1567 remove_wait_queue(&runtime->sleep, &wait); 1568 return result; 1569} 1570 1571static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1572{ 1573 int err = 0; 1574 unsigned int saved_f_flags; 1575 struct snd_pcm_substream *substream; 1576 struct snd_pcm_runtime *runtime; 1577 snd_pcm_format_t format; 1578 unsigned long width; 1579 size_t size; 1580 1581 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1582 if (substream != NULL) { 1583 runtime = substream->runtime; 1584 if (atomic_read(&substream->mmap_count)) 1585 goto __direct; 1586 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1587 return err; 1588 format = snd_pcm_oss_format_from(runtime->oss.format); 1589 width = snd_pcm_format_physical_width(format); 1590 mutex_lock(&runtime->oss.params_lock); 1591 if (runtime->oss.buffer_used > 0) { 1592#ifdef OSS_DEBUG 1593 printk("sync: buffer_used\n"); 1594#endif 1595 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1596 snd_pcm_format_set_silence(format, 1597 runtime->oss.buffer + runtime->oss.buffer_used, 1598 size); 1599 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1600 if (err < 0) { 1601 mutex_unlock(&runtime->oss.params_lock); 1602 return err; 1603 } 1604 } else if (runtime->oss.period_ptr > 0) { 1605#ifdef OSS_DEBUG 1606 printk("sync: period_ptr\n"); 1607#endif 1608 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1609 snd_pcm_format_set_silence(format, 1610 runtime->oss.buffer, 1611 size * 8 / width); 1612 err = snd_pcm_oss_sync1(substream, size); 1613 if (err < 0) { 1614 mutex_unlock(&runtime->oss.params_lock); 1615 return err; 1616 } 1617 } 1618 /* 1619 * The ALSA's period might be a bit large than OSS one. 1620 * Fill the remain portion of ALSA period with zeros. 1621 */ 1622 size = runtime->control->appl_ptr % runtime->period_size; 1623 if (size > 0) { 1624 size = runtime->period_size - size; 1625 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1626 size = (runtime->frame_bits * size) / 8; 1627 while (size > 0) { 1628 mm_segment_t fs; 1629 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1630 size -= size1; 1631 size1 *= 8; 1632 size1 /= runtime->sample_bits; 1633 snd_pcm_format_set_silence(runtime->format, 1634 runtime->oss.buffer, 1635 size1); 1636 size1 /= runtime->channels; /* frames */ 1637 fs = snd_enter_user(); 1638 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1639 snd_leave_user(fs); 1640 } 1641 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1642 void __user *buffers[runtime->channels]; 1643 memset(buffers, 0, runtime->channels * sizeof(void *)); 1644 snd_pcm_lib_writev(substream, buffers, size); 1645 } 1646 } 1647 mutex_unlock(&runtime->oss.params_lock); 1648 /* 1649 * finish sync: drain the buffer 1650 */ 1651 __direct: 1652 saved_f_flags = substream->f_flags; 1653 substream->f_flags &= ~O_NONBLOCK; 1654 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1655 substream->f_flags = saved_f_flags; 1656 if (err < 0) 1657 return err; 1658 runtime->oss.prepare = 1; 1659 } 1660 1661 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1662 if (substream != NULL) { 1663 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1664 return err; 1665 runtime = substream->runtime; 1666 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1667 if (err < 0) 1668 return err; 1669 runtime->oss.buffer_used = 0; 1670 runtime->oss.prepare = 1; 1671 } 1672 return 0; 1673} 1674 1675static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1676{ 1677 int idx; 1678 1679 for (idx = 1; idx >= 0; --idx) { 1680 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1681 struct snd_pcm_runtime *runtime; 1682 if (substream == NULL) 1683 continue; 1684 runtime = substream->runtime; 1685 if (rate < 1000) 1686 rate = 1000; 1687 else if (rate > 192000) 1688 rate = 192000; 1689 if (runtime->oss.rate != rate) { 1690 runtime->oss.params = 1; 1691 runtime->oss.rate = rate; 1692 } 1693 } 1694 return snd_pcm_oss_get_rate(pcm_oss_file); 1695} 1696 1697static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1698{ 1699 struct snd_pcm_substream *substream; 1700 int err; 1701 1702 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1703 return err; 1704 return substream->runtime->oss.rate; 1705} 1706 1707static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1708{ 1709 int idx; 1710 if (channels < 1) 1711 channels = 1; 1712 if (channels > 128) 1713 return -EINVAL; 1714 for (idx = 1; idx >= 0; --idx) { 1715 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1716 struct snd_pcm_runtime *runtime; 1717 if (substream == NULL) 1718 continue; 1719 runtime = substream->runtime; 1720 if (runtime->oss.channels != channels) { 1721 runtime->oss.params = 1; 1722 runtime->oss.channels = channels; 1723 } 1724 } 1725 return snd_pcm_oss_get_channels(pcm_oss_file); 1726} 1727 1728static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1729{ 1730 struct snd_pcm_substream *substream; 1731 int err; 1732 1733 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1734 return err; 1735 return substream->runtime->oss.channels; 1736} 1737 1738static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1739{ 1740 struct snd_pcm_substream *substream; 1741 int err; 1742 1743 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1744 return err; 1745 return substream->runtime->oss.period_bytes; 1746} 1747 1748static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1749{ 1750 struct snd_pcm_substream *substream; 1751 int err; 1752 int direct; 1753 struct snd_pcm_hw_params *params; 1754 unsigned int formats = 0; 1755 struct snd_mask format_mask; 1756 int fmt; 1757 1758 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1759 return err; 1760 if (atomic_read(&substream->mmap_count)) 1761 direct = 1; 1762 else 1763 direct = substream->oss.setup.direct; 1764 if (!direct) 1765 return AFMT_MU_LAW | AFMT_U8 | 1766 AFMT_S16_LE | AFMT_S16_BE | 1767 AFMT_S8 | AFMT_U16_LE | 1768 AFMT_U16_BE | 1769 AFMT_S32_LE | AFMT_S32_BE | 1770 AFMT_S24_LE | AFMT_S24_LE | 1771 AFMT_S24_PACKED; 1772 params = kmalloc(sizeof(*params), GFP_KERNEL); 1773 if (!params) 1774 return -ENOMEM; 1775 _snd_pcm_hw_params_any(params); 1776 err = snd_pcm_hw_refine(substream, params); 1777 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1778 kfree(params); 1779 if (err < 0) 1780 return err; 1781 for (fmt = 0; fmt < 32; ++fmt) { 1782 if (snd_mask_test(&format_mask, fmt)) { 1783 int f = snd_pcm_oss_format_to(fmt); 1784 if (f >= 0) 1785 formats |= f; 1786 } 1787 } 1788 return formats; 1789} 1790 1791static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1792{ 1793 int formats, idx; 1794 1795 if (format != AFMT_QUERY) { 1796 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1797 if (formats < 0) 1798 return formats; 1799 if (!(formats & format)) 1800 format = AFMT_U8; 1801 for (idx = 1; idx >= 0; --idx) { 1802 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1803 struct snd_pcm_runtime *runtime; 1804 if (substream == NULL) 1805 continue; 1806 runtime = substream->runtime; 1807 if (runtime->oss.format != format) { 1808 runtime->oss.params = 1; 1809 runtime->oss.format = format; 1810 } 1811 } 1812 } 1813 return snd_pcm_oss_get_format(pcm_oss_file); 1814} 1815 1816static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1817{ 1818 struct snd_pcm_substream *substream; 1819 int err; 1820 1821 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1822 return err; 1823 return substream->runtime->oss.format; 1824} 1825 1826static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1827{ 1828 struct snd_pcm_runtime *runtime; 1829 1830 if (substream == NULL) 1831 return 0; 1832 runtime = substream->runtime; 1833 if (subdivide == 0) { 1834 subdivide = runtime->oss.subdivision; 1835 if (subdivide == 0) 1836 subdivide = 1; 1837 return subdivide; 1838 } 1839 if (runtime->oss.subdivision || runtime->oss.fragshift) 1840 return -EINVAL; 1841 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1842 subdivide != 8 && subdivide != 16) 1843 return -EINVAL; 1844 runtime->oss.subdivision = subdivide; 1845 runtime->oss.params = 1; 1846 return subdivide; 1847} 1848 1849static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1850{ 1851 int err = -EINVAL, idx; 1852 1853 for (idx = 1; idx >= 0; --idx) { 1854 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1855 if (substream == NULL) 1856 continue; 1857 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1858 return err; 1859 } 1860 return err; 1861} 1862 1863static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1864{ 1865 struct snd_pcm_runtime *runtime; 1866 1867 if (substream == NULL) 1868 return 0; 1869 runtime = substream->runtime; 1870 if (runtime->oss.subdivision || runtime->oss.fragshift) 1871 return -EINVAL; 1872 runtime->oss.fragshift = val & 0xffff; 1873 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1874 if (runtime->oss.fragshift < 4) /* < 16 */ 1875 runtime->oss.fragshift = 4; 1876 if (runtime->oss.maxfrags < 2) 1877 runtime->oss.maxfrags = 2; 1878 runtime->oss.params = 1; 1879 return 0; 1880} 1881 1882static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1883{ 1884 int err = -EINVAL, idx; 1885 1886 for (idx = 1; idx >= 0; --idx) { 1887 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1888 if (substream == NULL) 1889 continue; 1890 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1891 return err; 1892 } 1893 return err; 1894} 1895 1896static int snd_pcm_oss_nonblock(struct file * file) 1897{ 1898 file->f_flags |= O_NONBLOCK; 1899 return 0; 1900} 1901 1902static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1903{ 1904 1905 if (substream == NULL) { 1906 res &= ~DSP_CAP_DUPLEX; 1907 return res; 1908 } 1909#ifdef DSP_CAP_MULTI 1910 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1911 if (substream->pstr->substream_count > 1) 1912 res |= DSP_CAP_MULTI; 1913#endif 1914 /* DSP_CAP_REALTIME is set all times: */ 1915 /* all ALSA drivers can return actual pointer in ring buffer */ 1916#if defined(DSP_CAP_REALTIME) && 0 1917 { 1918 struct snd_pcm_runtime *runtime = substream->runtime; 1919 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1920 res &= ~DSP_CAP_REALTIME; 1921 } 1922#endif 1923 return res; 1924} 1925 1926static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1927{ 1928 int result, idx; 1929 1930 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1931 for (idx = 0; idx < 2; idx++) { 1932 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1933 result = snd_pcm_oss_get_caps1(substream, result); 1934 } 1935 result |= 0x0001; /* revision - same as SB AWE 64 */ 1936 return result; 1937} 1938 1939static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr) 1940{ 1941 struct snd_pcm_runtime *runtime = substream->runtime; 1942 snd_pcm_uframes_t appl_ptr; 1943 appl_ptr = hw_ptr + runtime->buffer_size; 1944 appl_ptr %= runtime->boundary; 1945 runtime->control->appl_ptr = appl_ptr; 1946} 1947 1948static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1949{ 1950 struct snd_pcm_runtime *runtime; 1951 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1952 int err, cmd; 1953 1954#ifdef OSS_DEBUG 1955 printk("pcm_oss: trigger = 0x%x\n", trigger); 1956#endif 1957 1958 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1959 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1960 1961 if (psubstream) { 1962 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1963 return err; 1964 } 1965 if (csubstream) { 1966 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1967 return err; 1968 } 1969 if (psubstream) { 1970 runtime = psubstream->runtime; 1971 if (trigger & PCM_ENABLE_OUTPUT) { 1972 if (runtime->oss.trigger) 1973 goto _skip1; 1974 if (atomic_read(&psubstream->mmap_count)) 1975 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); 1976 runtime->oss.trigger = 1; 1977 runtime->start_threshold = 1; 1978 cmd = SNDRV_PCM_IOCTL_START; 1979 } else { 1980 if (!runtime->oss.trigger) 1981 goto _skip1; 1982 runtime->oss.trigger = 0; 1983 runtime->start_threshold = runtime->boundary; 1984 cmd = SNDRV_PCM_IOCTL_DROP; 1985 runtime->oss.prepare = 1; 1986 } 1987 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 1988 if (err < 0) 1989 return err; 1990 } 1991 _skip1: 1992 if (csubstream) { 1993 runtime = csubstream->runtime; 1994 if (trigger & PCM_ENABLE_INPUT) { 1995 if (runtime->oss.trigger) 1996 goto _skip2; 1997 runtime->oss.trigger = 1; 1998 runtime->start_threshold = 1; 1999 cmd = SNDRV_PCM_IOCTL_START; 2000 } else { 2001 if (!runtime->oss.trigger) 2002 goto _skip2; 2003 runtime->oss.trigger = 0; 2004 runtime->start_threshold = runtime->boundary; 2005 cmd = SNDRV_PCM_IOCTL_DROP; 2006 runtime->oss.prepare = 1; 2007 } 2008 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2009 if (err < 0) 2010 return err; 2011 } 2012 _skip2: 2013 return 0; 2014} 2015 2016static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2017{ 2018 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2019 int result = 0; 2020 2021 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2022 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2023 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2024 result |= PCM_ENABLE_OUTPUT; 2025 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2026 result |= PCM_ENABLE_INPUT; 2027 return result; 2028} 2029 2030static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2031{ 2032 struct snd_pcm_substream *substream; 2033 struct snd_pcm_runtime *runtime; 2034 snd_pcm_sframes_t delay; 2035 int err; 2036 2037 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2038 if (substream == NULL) 2039 return -EINVAL; 2040 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2041 return err; 2042 runtime = substream->runtime; 2043 if (runtime->oss.params || runtime->oss.prepare) 2044 return 0; 2045 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2046 if (err == -EPIPE) 2047 delay = 0; /* hack for broken OSS applications */ 2048 else if (err < 0) 2049 return err; 2050 return snd_pcm_oss_bytes(substream, delay); 2051} 2052 2053static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2054{ 2055 struct snd_pcm_substream *substream; 2056 struct snd_pcm_runtime *runtime; 2057 snd_pcm_sframes_t delay; 2058 int fixup; 2059 struct count_info info; 2060 int err; 2061 2062 if (_info == NULL) 2063 return -EFAULT; 2064 substream = pcm_oss_file->streams[stream]; 2065 if (substream == NULL) 2066 return -EINVAL; 2067 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2068 return err; 2069 runtime = substream->runtime; 2070 if (runtime->oss.params || runtime->oss.prepare) { 2071 memset(&info, 0, sizeof(info)); 2072 if (copy_to_user(_info, &info, sizeof(info))) 2073 return -EFAULT; 2074 return 0; 2075 } 2076 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2078 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2079 err = 0; 2080 delay = 0; 2081 fixup = 0; 2082 } else { 2083 fixup = runtime->oss.buffer_used; 2084 } 2085 } else { 2086 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2087 fixup = -runtime->oss.buffer_used; 2088 } 2089 if (err < 0) 2090 return err; 2091 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2092 if (atomic_read(&substream->mmap_count)) { 2093 snd_pcm_sframes_t n; 2094 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; 2095 if (n < 0) 2096 n += runtime->boundary; 2097 info.blocks = n / runtime->period_size; 2098 runtime->oss.prev_hw_ptr_interrupt = delay; 2099 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2100 snd_pcm_oss_simulate_fill(substream, delay); 2101 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2102 } else { 2103 delay = snd_pcm_oss_bytes(substream, delay); 2104 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2105 if (substream->oss.setup.buggyptr) 2106 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2107 else 2108 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2109 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2110 } else { 2111 delay += fixup; 2112 info.blocks = delay / runtime->oss.period_bytes; 2113 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2114 } 2115 } 2116 if (copy_to_user(_info, &info, sizeof(info))) 2117 return -EFAULT; 2118 return 0; 2119} 2120 2121static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2122{ 2123 struct snd_pcm_substream *substream; 2124 struct snd_pcm_runtime *runtime; 2125 snd_pcm_sframes_t avail; 2126 int fixup; 2127 struct audio_buf_info info; 2128 int err; 2129 2130 if (_info == NULL) 2131 return -EFAULT; 2132 substream = pcm_oss_file->streams[stream]; 2133 if (substream == NULL) 2134 return -EINVAL; 2135 runtime = substream->runtime; 2136 2137 if (runtime->oss.params && 2138 (err = snd_pcm_oss_change_params(substream)) < 0) 2139 return err; 2140 2141 info.fragsize = runtime->oss.period_bytes; 2142 info.fragstotal = runtime->periods; 2143 if (runtime->oss.prepare) { 2144 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2145 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2146 info.fragments = runtime->oss.periods; 2147 } else { 2148 info.bytes = 0; 2149 info.fragments = 0; 2150 } 2151 } else { 2152 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2153 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2154 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2155 avail = runtime->buffer_size; 2156 err = 0; 2157 fixup = 0; 2158 } else { 2159 avail = runtime->buffer_size - avail; 2160 fixup = -runtime->oss.buffer_used; 2161 } 2162 } else { 2163 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2164 fixup = runtime->oss.buffer_used; 2165 } 2166 if (err < 0) 2167 return err; 2168 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2169 info.fragments = info.bytes / runtime->oss.period_bytes; 2170 } 2171 2172#ifdef OSS_DEBUG 2173 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); 2174#endif 2175 if (copy_to_user(_info, &info, sizeof(info))) 2176 return -EFAULT; 2177 return 0; 2178} 2179 2180static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2181{ 2182 // it won't be probably implemented 2183 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 2184 return -EINVAL; 2185} 2186 2187static const char *strip_task_path(const char *path) 2188{ 2189 const char *ptr, *ptrl = NULL; 2190 for (ptr = path; *ptr; ptr++) { 2191 if (*ptr == '/') 2192 ptrl = ptr + 1; 2193 } 2194 return ptrl; 2195} 2196 2197static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2198 const char *task_name, 2199 struct snd_pcm_oss_setup *rsetup) 2200{ 2201 struct snd_pcm_oss_setup *setup; 2202 2203 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2204 do { 2205 for (setup = pcm->streams[stream].oss.setup_list; setup; 2206 setup = setup->next) { 2207 if (!strcmp(setup->task_name, task_name)) 2208 goto out; 2209 } 2210 } while ((task_name = strip_task_path(task_name)) != NULL); 2211 out: 2212 if (setup) 2213 *rsetup = *setup; 2214 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2215} 2216 2217static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2218{ 2219 struct snd_pcm_runtime *runtime; 2220 runtime = substream->runtime; 2221 vfree(runtime->oss.buffer); 2222 runtime->oss.buffer = NULL; 2223#ifdef CONFIG_SND_PCM_OSS_PLUGINS 2224 snd_pcm_oss_plugin_clear(substream); 2225#endif 2226 substream->oss.oss = 0; 2227} 2228 2229static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2230 struct snd_pcm_oss_setup *setup, 2231 int minor) 2232{ 2233 struct snd_pcm_runtime *runtime; 2234 2235 substream->oss.oss = 1; 2236 substream->oss.setup = *setup; 2237 if (setup->nonblock) 2238 substream->f_flags |= O_NONBLOCK; 2239 else if (setup->block) 2240 substream->f_flags &= ~O_NONBLOCK; 2241 runtime = substream->runtime; 2242 runtime->oss.params = 1; 2243 runtime->oss.trigger = 1; 2244 runtime->oss.rate = 8000; 2245 mutex_init(&runtime->oss.params_lock); 2246 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2247 case SNDRV_MINOR_OSS_PCM_8: 2248 runtime->oss.format = AFMT_U8; 2249 break; 2250 case SNDRV_MINOR_OSS_PCM_16: 2251 runtime->oss.format = AFMT_S16_LE; 2252 break; 2253 default: 2254 runtime->oss.format = AFMT_MU_LAW; 2255 } 2256 runtime->oss.channels = 1; 2257 runtime->oss.fragshift = 0; 2258 runtime->oss.maxfrags = 0; 2259 runtime->oss.subdivision = 0; 2260 substream->pcm_release = snd_pcm_oss_release_substream; 2261} 2262 2263static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2264{ 2265 int cidx; 2266 if (!pcm_oss_file) 2267 return 0; 2268 for (cidx = 0; cidx < 2; ++cidx) { 2269 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2270 if (substream) 2271 snd_pcm_release_substream(substream); 2272 } 2273 kfree(pcm_oss_file); 2274 return 0; 2275} 2276 2277static int snd_pcm_oss_open_file(struct file *file, 2278 struct snd_pcm *pcm, 2279 struct snd_pcm_oss_file **rpcm_oss_file, 2280 int minor, 2281 struct snd_pcm_oss_setup *setup) 2282{ 2283 int idx, err; 2284 struct snd_pcm_oss_file *pcm_oss_file; 2285 struct snd_pcm_substream *substream; 2286 fmode_t f_mode = file->f_mode; 2287 2288 if (rpcm_oss_file) 2289 *rpcm_oss_file = NULL; 2290 2291 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2292 if (pcm_oss_file == NULL) 2293 return -ENOMEM; 2294 2295 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2296 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2297 f_mode = FMODE_WRITE; 2298 2299 file->f_flags &= ~O_APPEND; 2300 for (idx = 0; idx < 2; idx++) { 2301 if (setup[idx].disable) 2302 continue; 2303 if (! pcm->streams[idx].substream_count) 2304 continue; /* no matching substream */ 2305 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2306 if (! (f_mode & FMODE_WRITE)) 2307 continue; 2308 } else { 2309 if (! (f_mode & FMODE_READ)) 2310 continue; 2311 } 2312 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2313 if (err < 0) { 2314 snd_pcm_oss_release_file(pcm_oss_file); 2315 return err; 2316 } 2317 2318 pcm_oss_file->streams[idx] = substream; 2319 substream->file = pcm_oss_file; 2320 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2321 } 2322 2323 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2324 snd_pcm_oss_release_file(pcm_oss_file); 2325 return -EINVAL; 2326 } 2327 2328 file->private_data = pcm_oss_file; 2329 if (rpcm_oss_file) 2330 *rpcm_oss_file = pcm_oss_file; 2331 return 0; 2332} 2333 2334 2335static int snd_task_name(struct task_struct *task, char *name, size_t size) 2336{ 2337 unsigned int idx; 2338 2339 if (snd_BUG_ON(!task || !name || size < 2)) 2340 return -EINVAL; 2341 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2342 name[idx] = task->comm[idx]; 2343 name[idx] = '\0'; 2344 return 0; 2345} 2346 2347static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2348{ 2349 int err; 2350 char task_name[32]; 2351 struct snd_pcm *pcm; 2352 struct snd_pcm_oss_file *pcm_oss_file; 2353 struct snd_pcm_oss_setup setup[2]; 2354 int nonblock; 2355 wait_queue_t wait; 2356 2357 pcm = snd_lookup_oss_minor_data(iminor(inode), 2358 SNDRV_OSS_DEVICE_TYPE_PCM); 2359 if (pcm == NULL) { 2360 err = -ENODEV; 2361 goto __error1; 2362 } 2363 err = snd_card_file_add(pcm->card, file); 2364 if (err < 0) 2365 goto __error1; 2366 if (!try_module_get(pcm->card->module)) { 2367 err = -EFAULT; 2368 goto __error2; 2369 } 2370 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2371 err = -EFAULT; 2372 goto __error; 2373 } 2374 memset(setup, 0, sizeof(setup)); 2375 if (file->f_mode & FMODE_WRITE) 2376 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2377 task_name, &setup[0]); 2378 if (file->f_mode & FMODE_READ) 2379 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2380 task_name, &setup[1]); 2381 2382 nonblock = !!(file->f_flags & O_NONBLOCK); 2383 if (!nonblock) 2384 nonblock = nonblock_open; 2385 2386 init_waitqueue_entry(&wait, current); 2387 add_wait_queue(&pcm->open_wait, &wait); 2388 mutex_lock(&pcm->open_mutex); 2389 while (1) { 2390 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2391 iminor(inode), setup); 2392 if (err >= 0) 2393 break; 2394 if (err == -EAGAIN) { 2395 if (nonblock) { 2396 err = -EBUSY; 2397 break; 2398 } 2399 } else 2400 break; 2401 set_current_state(TASK_INTERRUPTIBLE); 2402 mutex_unlock(&pcm->open_mutex); 2403 schedule(); 2404 mutex_lock(&pcm->open_mutex); 2405 if (signal_pending(current)) { 2406 err = -ERESTARTSYS; 2407 break; 2408 } 2409 } 2410 remove_wait_queue(&pcm->open_wait, &wait); 2411 mutex_unlock(&pcm->open_mutex); 2412 if (err < 0) 2413 goto __error; 2414 return err; 2415 2416 __error: 2417 module_put(pcm->card->module); 2418 __error2: 2419 snd_card_file_remove(pcm->card, file); 2420 __error1: 2421 return err; 2422} 2423 2424static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2425{ 2426 struct snd_pcm *pcm; 2427 struct snd_pcm_substream *substream; 2428 struct snd_pcm_oss_file *pcm_oss_file; 2429 2430 pcm_oss_file = file->private_data; 2431 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2432 if (substream == NULL) 2433 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2434 if (snd_BUG_ON(!substream)) 2435 return -ENXIO; 2436 pcm = substream->pcm; 2437 if (!pcm->card->shutdown) 2438 snd_pcm_oss_sync(pcm_oss_file); 2439 mutex_lock(&pcm->open_mutex); 2440 snd_pcm_oss_release_file(pcm_oss_file); 2441 mutex_unlock(&pcm->open_mutex); 2442 wake_up(&pcm->open_wait); 2443 module_put(pcm->card->module); 2444 snd_card_file_remove(pcm->card, file); 2445 return 0; 2446} 2447 2448static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2449{ 2450 struct snd_pcm_oss_file *pcm_oss_file; 2451 int __user *p = (int __user *)arg; 2452 int res; 2453 2454 pcm_oss_file = file->private_data; 2455 if (cmd == OSS_GETVERSION) 2456 return put_user(SNDRV_OSS_VERSION, p); 2457 if (cmd == OSS_ALSAEMULVER) 2458 return put_user(1, p); 2459#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2460 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2461 struct snd_pcm_substream *substream; 2462 int idx; 2463 for (idx = 0; idx < 2; ++idx) { 2464 substream = pcm_oss_file->streams[idx]; 2465 if (substream != NULL) 2466 break; 2467 } 2468 if (snd_BUG_ON(idx >= 2)) 2469 return -ENXIO; 2470 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2471 } 2472#endif 2473 if (((cmd >> 8) & 0xff) != 'P') 2474 return -EINVAL; 2475#ifdef OSS_DEBUG 2476 printk("pcm_oss: ioctl = 0x%x\n", cmd); 2477#endif 2478 switch (cmd) { 2479 case SNDCTL_DSP_RESET: 2480 return snd_pcm_oss_reset(pcm_oss_file); 2481 case SNDCTL_DSP_SYNC: 2482 return snd_pcm_oss_sync(pcm_oss_file); 2483 case SNDCTL_DSP_SPEED: 2484 if (get_user(res, p)) 2485 return -EFAULT; 2486 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2487 return res; 2488 return put_user(res, p); 2489 case SOUND_PCM_READ_RATE: 2490 res = snd_pcm_oss_get_rate(pcm_oss_file); 2491 if (res < 0) 2492 return res; 2493 return put_user(res, p); 2494 case SNDCTL_DSP_STEREO: 2495 if (get_user(res, p)) 2496 return -EFAULT; 2497 res = res > 0 ? 2 : 1; 2498 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2499 return res; 2500 return put_user(--res, p); 2501 case SNDCTL_DSP_GETBLKSIZE: 2502 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2503 if (res < 0) 2504 return res; 2505 return put_user(res, p); 2506 case SNDCTL_DSP_SETFMT: 2507 if (get_user(res, p)) 2508 return -EFAULT; 2509 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2510 if (res < 0) 2511 return res; 2512 return put_user(res, p); 2513 case SOUND_PCM_READ_BITS: 2514 res = snd_pcm_oss_get_format(pcm_oss_file); 2515 if (res < 0) 2516 return res; 2517 return put_user(res, p); 2518 case SNDCTL_DSP_CHANNELS: 2519 if (get_user(res, p)) 2520 return -EFAULT; 2521 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2522 if (res < 0) 2523 return res; 2524 return put_user(res, p); 2525 case SOUND_PCM_READ_CHANNELS: 2526 res = snd_pcm_oss_get_channels(pcm_oss_file); 2527 if (res < 0) 2528 return res; 2529 return put_user(res, p); 2530 case SOUND_PCM_WRITE_FILTER: 2531 case SOUND_PCM_READ_FILTER: 2532 return -EIO; 2533 case SNDCTL_DSP_POST: 2534 return snd_pcm_oss_post(pcm_oss_file); 2535 case SNDCTL_DSP_SUBDIVIDE: 2536 if (get_user(res, p)) 2537 return -EFAULT; 2538 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2539 if (res < 0) 2540 return res; 2541 return put_user(res, p); 2542 case SNDCTL_DSP_SETFRAGMENT: 2543 if (get_user(res, p)) 2544 return -EFAULT; 2545 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2546 case SNDCTL_DSP_GETFMTS: 2547 res = snd_pcm_oss_get_formats(pcm_oss_file); 2548 if (res < 0) 2549 return res; 2550 return put_user(res, p); 2551 case SNDCTL_DSP_GETOSPACE: 2552 case SNDCTL_DSP_GETISPACE: 2553 return snd_pcm_oss_get_space(pcm_oss_file, 2554 cmd == SNDCTL_DSP_GETISPACE ? 2555 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2556 (struct audio_buf_info __user *) arg); 2557 case SNDCTL_DSP_NONBLOCK: 2558 return snd_pcm_oss_nonblock(file); 2559 case SNDCTL_DSP_GETCAPS: 2560 res = snd_pcm_oss_get_caps(pcm_oss_file); 2561 if (res < 0) 2562 return res; 2563 return put_user(res, p); 2564 case SNDCTL_DSP_GETTRIGGER: 2565 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2566 if (res < 0) 2567 return res; 2568 return put_user(res, p); 2569 case SNDCTL_DSP_SETTRIGGER: 2570 if (get_user(res, p)) 2571 return -EFAULT; 2572 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2573 case SNDCTL_DSP_GETIPTR: 2574 case SNDCTL_DSP_GETOPTR: 2575 return snd_pcm_oss_get_ptr(pcm_oss_file, 2576 cmd == SNDCTL_DSP_GETIPTR ? 2577 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2578 (struct count_info __user *) arg); 2579 case SNDCTL_DSP_MAPINBUF: 2580 case SNDCTL_DSP_MAPOUTBUF: 2581 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2582 cmd == SNDCTL_DSP_MAPINBUF ? 2583 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2584 (struct buffmem_desc __user *) arg); 2585 case SNDCTL_DSP_SETSYNCRO: 2586 /* stop DMA now.. */ 2587 return 0; 2588 case SNDCTL_DSP_SETDUPLEX: 2589 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2590 return 0; 2591 return -EIO; 2592 case SNDCTL_DSP_GETODELAY: 2593 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2594 if (res < 0) { 2595 /* it's for sure, some broken apps don't check for error codes */ 2596 put_user(0, p); 2597 return res; 2598 } 2599 return put_user(res, p); 2600 case SNDCTL_DSP_PROFILE: 2601 return 0; /* silently ignore */ 2602 default: 2603 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2604 } 2605 return -EINVAL; 2606} 2607 2608#ifdef CONFIG_COMPAT 2609/* all compatible */ 2610#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2611#else 2612#define snd_pcm_oss_ioctl_compat NULL 2613#endif 2614 2615static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2616{ 2617 struct snd_pcm_oss_file *pcm_oss_file; 2618 struct snd_pcm_substream *substream; 2619 2620 pcm_oss_file = file->private_data; 2621 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2622 if (substream == NULL) 2623 return -ENXIO; 2624 substream->f_flags = file->f_flags & O_NONBLOCK; 2625#ifndef OSS_DEBUG 2626 return snd_pcm_oss_read1(substream, buf, count); 2627#else 2628 { 2629 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2630 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); 2631 return res; 2632 } 2633#endif 2634} 2635 2636static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2637{ 2638 struct snd_pcm_oss_file *pcm_oss_file; 2639 struct snd_pcm_substream *substream; 2640 long result; 2641 2642 pcm_oss_file = file->private_data; 2643 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2644 if (substream == NULL) 2645 return -ENXIO; 2646 substream->f_flags = file->f_flags & O_NONBLOCK; 2647 result = snd_pcm_oss_write1(substream, buf, count); 2648#ifdef OSS_DEBUG 2649 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); 2650#endif 2651 return result; 2652} 2653 2654static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2655{ 2656 struct snd_pcm_runtime *runtime = substream->runtime; 2657 if (atomic_read(&substream->mmap_count)) 2658 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2659 else 2660 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; 2661} 2662 2663static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2664{ 2665 struct snd_pcm_runtime *runtime = substream->runtime; 2666 if (atomic_read(&substream->mmap_count)) 2667 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2668 else 2669 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; 2670} 2671 2672static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2673{ 2674 struct snd_pcm_oss_file *pcm_oss_file; 2675 unsigned int mask; 2676 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2677 2678 pcm_oss_file = file->private_data; 2679 2680 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2681 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2682 2683 mask = 0; 2684 if (psubstream != NULL) { 2685 struct snd_pcm_runtime *runtime = psubstream->runtime; 2686 poll_wait(file, &runtime->sleep, wait); 2687 snd_pcm_stream_lock_irq(psubstream); 2688 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2689 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2690 snd_pcm_oss_playback_ready(psubstream))) 2691 mask |= POLLOUT | POLLWRNORM; 2692 snd_pcm_stream_unlock_irq(psubstream); 2693 } 2694 if (csubstream != NULL) { 2695 struct snd_pcm_runtime *runtime = csubstream->runtime; 2696 snd_pcm_state_t ostate; 2697 poll_wait(file, &runtime->sleep, wait); 2698 snd_pcm_stream_lock_irq(csubstream); 2699 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2700 snd_pcm_oss_capture_ready(csubstream)) 2701 mask |= POLLIN | POLLRDNORM; 2702 snd_pcm_stream_unlock_irq(csubstream); 2703 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2704 struct snd_pcm_oss_file ofile; 2705 memset(&ofile, 0, sizeof(ofile)); 2706 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2707 runtime->oss.trigger = 0; 2708 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2709 } 2710 } 2711 2712 return mask; 2713} 2714 2715static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2716{ 2717 struct snd_pcm_oss_file *pcm_oss_file; 2718 struct snd_pcm_substream *substream = NULL; 2719 struct snd_pcm_runtime *runtime; 2720 int err; 2721 2722#ifdef OSS_DEBUG 2723 printk("pcm_oss: mmap begin\n"); 2724#endif 2725 pcm_oss_file = file->private_data; 2726 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2727 case VM_READ | VM_WRITE: 2728 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2729 if (substream) 2730 break; 2731 /* Fall through */ 2732 case VM_READ: 2733 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2734 break; 2735 case VM_WRITE: 2736 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2737 break; 2738 default: 2739 return -EINVAL; 2740 } 2741 /* set VM_READ access as well to fix memset() routines that do 2742 reads before writes (to improve performance) */ 2743 area->vm_flags |= VM_READ; 2744 if (substream == NULL) 2745 return -ENXIO; 2746 runtime = substream->runtime; 2747 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2748 return -EIO; 2749 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2750 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2751 else 2752 return -EIO; 2753 2754 if (runtime->oss.params) { 2755 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2756 return err; 2757 } 2758#ifdef CONFIG_SND_PCM_OSS_PLUGINS 2759 if (runtime->oss.plugin_first != NULL) 2760 return -EIO; 2761#endif 2762 2763 if (area->vm_pgoff != 0) 2764 return -EINVAL; 2765 2766 err = snd_pcm_mmap_data(substream, file, area); 2767 if (err < 0) 2768 return err; 2769 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2770 runtime->silence_threshold = 0; 2771 runtime->silence_size = 0; 2772#ifdef OSS_DEBUG 2773 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); 2774#endif 2775 /* In mmap mode we never stop */ 2776 runtime->stop_threshold = runtime->boundary; 2777 2778 return 0; 2779} 2780 2781#ifdef CONFIG_SND_VERBOSE_PROCFS 2782/* 2783 * /proc interface 2784 */ 2785 2786static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2787 struct snd_info_buffer *buffer) 2788{ 2789 struct snd_pcm_str *pstr = entry->private_data; 2790 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2791 mutex_lock(&pstr->oss.setup_mutex); 2792 while (setup) { 2793 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2794 setup->task_name, 2795 setup->periods, 2796 setup->period_size, 2797 setup->disable ? " disable" : "", 2798 setup->direct ? " direct" : "", 2799 setup->block ? " block" : "", 2800 setup->nonblock ? " non-block" : "", 2801 setup->partialfrag ? " partial-frag" : "", 2802 setup->nosilence ? " no-silence" : ""); 2803 setup = setup->next; 2804 } 2805 mutex_unlock(&pstr->oss.setup_mutex); 2806} 2807 2808static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2809{ 2810 struct snd_pcm_oss_setup *setup, *setupn; 2811 2812 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2813 setup; setup = setupn) { 2814 setupn = setup->next; 2815 kfree(setup->task_name); 2816 kfree(setup); 2817 } 2818 pstr->oss.setup_list = NULL; 2819} 2820 2821static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2822 struct snd_info_buffer *buffer) 2823{ 2824 struct snd_pcm_str *pstr = entry->private_data; 2825 char line[128], str[32], task_name[32], *ptr; 2826 int idx1; 2827 struct snd_pcm_oss_setup *setup, *setup1, template; 2828 2829 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2830 mutex_lock(&pstr->oss.setup_mutex); 2831 memset(&template, 0, sizeof(template)); 2832 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2833 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2834 snd_pcm_oss_proc_free_setup_list(pstr); 2835 mutex_unlock(&pstr->oss.setup_mutex); 2836 continue; 2837 } 2838 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2839 if (!strcmp(setup->task_name, task_name)) { 2840 template = *setup; 2841 break; 2842 } 2843 } 2844 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2845 template.periods = simple_strtoul(str, NULL, 10); 2846 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2847 template.period_size = simple_strtoul(str, NULL, 10); 2848 for (idx1 = 31; idx1 >= 0; idx1--) 2849 if (template.period_size & (1 << idx1)) 2850 break; 2851 for (idx1--; idx1 >= 0; idx1--) 2852 template.period_size &= ~(1 << idx1); 2853 do { 2854 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2855 if (!strcmp(str, "disable")) { 2856 template.disable = 1; 2857 } else if (!strcmp(str, "direct")) { 2858 template.direct = 1; 2859 } else if (!strcmp(str, "block")) { 2860 template.block = 1; 2861 } else if (!strcmp(str, "non-block")) { 2862 template.nonblock = 1; 2863 } else if (!strcmp(str, "partial-frag")) { 2864 template.partialfrag = 1; 2865 } else if (!strcmp(str, "no-silence")) { 2866 template.nosilence = 1; 2867 } else if (!strcmp(str, "buggy-ptr")) { 2868 template.buggyptr = 1; 2869 } 2870 } while (*str); 2871 if (setup == NULL) { 2872 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2873 if (! setup) { 2874 buffer->error = -ENOMEM; 2875 mutex_lock(&pstr->oss.setup_mutex); 2876 return; 2877 } 2878 if (pstr->oss.setup_list == NULL) 2879 pstr->oss.setup_list = setup; 2880 else { 2881 for (setup1 = pstr->oss.setup_list; 2882 setup1->next; setup1 = setup1->next); 2883 setup1->next = setup; 2884 } 2885 template.task_name = kstrdup(task_name, GFP_KERNEL); 2886 if (! template.task_name) { 2887 kfree(setup); 2888 buffer->error = -ENOMEM; 2889 mutex_lock(&pstr->oss.setup_mutex); 2890 return; 2891 } 2892 } 2893 *setup = template; 2894 mutex_unlock(&pstr->oss.setup_mutex); 2895 } 2896} 2897 2898static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2899{ 2900 int stream; 2901 for (stream = 0; stream < 2; ++stream) { 2902 struct snd_info_entry *entry; 2903 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2904 if (pstr->substream_count == 0) 2905 continue; 2906 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2907 entry->content = SNDRV_INFO_CONTENT_TEXT; 2908 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2909 entry->c.text.read = snd_pcm_oss_proc_read; 2910 entry->c.text.write = snd_pcm_oss_proc_write; 2911 entry->private_data = pstr; 2912 if (snd_info_register(entry) < 0) { 2913 snd_info_free_entry(entry); 2914 entry = NULL; 2915 } 2916 } 2917 pstr->oss.proc_entry = entry; 2918 } 2919} 2920 2921static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2922{ 2923 int stream; 2924 for (stream = 0; stream < 2; ++stream) { 2925 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2926 snd_info_free_entry(pstr->oss.proc_entry); 2927 pstr->oss.proc_entry = NULL; 2928 snd_pcm_oss_proc_free_setup_list(pstr); 2929 } 2930} 2931#else /* !CONFIG_SND_VERBOSE_PROCFS */ 2932#define snd_pcm_oss_proc_init(pcm) 2933#define snd_pcm_oss_proc_done(pcm) 2934#endif /* CONFIG_SND_VERBOSE_PROCFS */ 2935 2936/* 2937 * ENTRY functions 2938 */ 2939 2940static const struct file_operations snd_pcm_oss_f_reg = 2941{ 2942 .owner = THIS_MODULE, 2943 .read = snd_pcm_oss_read, 2944 .write = snd_pcm_oss_write, 2945 .open = snd_pcm_oss_open, 2946 .release = snd_pcm_oss_release, 2947 .poll = snd_pcm_oss_poll, 2948 .unlocked_ioctl = snd_pcm_oss_ioctl, 2949 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2950 .mmap = snd_pcm_oss_mmap, 2951}; 2952 2953static void register_oss_dsp(struct snd_pcm *pcm, int index) 2954{ 2955 char name[128]; 2956 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2957 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2958 pcm->card, index, &snd_pcm_oss_f_reg, 2959 pcm, name) < 0) { 2960 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 2961 pcm->card->number, pcm->device); 2962 } 2963} 2964 2965static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 2966{ 2967 pcm->oss.reg = 0; 2968 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2969 char name[128]; 2970 int duplex; 2971 register_oss_dsp(pcm, 0); 2972 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2973 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2974 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2975 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2976#ifdef SNDRV_OSS_INFO_DEV_AUDIO 2977 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2978 pcm->card->number, 2979 name); 2980#endif 2981 pcm->oss.reg++; 2982 pcm->oss.reg_mask |= 1; 2983 } 2984 if (adsp_map[pcm->card->number] == (int)pcm->device) { 2985 register_oss_dsp(pcm, 1); 2986 pcm->oss.reg++; 2987 pcm->oss.reg_mask |= 2; 2988 } 2989 2990 if (pcm->oss.reg) 2991 snd_pcm_oss_proc_init(pcm); 2992 2993 return 0; 2994} 2995 2996static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 2997{ 2998 if (pcm->oss.reg) { 2999 if (pcm->oss.reg_mask & 1) { 3000 pcm->oss.reg_mask &= ~1; 3001 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3002 pcm->card, 0); 3003 } 3004 if (pcm->oss.reg_mask & 2) { 3005 pcm->oss.reg_mask &= ~2; 3006 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3007 pcm->card, 1); 3008 } 3009 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3010#ifdef SNDRV_OSS_INFO_DEV_AUDIO 3011 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3012#endif 3013 } 3014 pcm->oss.reg = 0; 3015 } 3016 return 0; 3017} 3018 3019static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3020{ 3021 snd_pcm_oss_disconnect_minor(pcm); 3022 snd_pcm_oss_proc_done(pcm); 3023 return 0; 3024} 3025 3026static struct snd_pcm_notify snd_pcm_oss_notify = 3027{ 3028 .n_register = snd_pcm_oss_register_minor, 3029 .n_disconnect = snd_pcm_oss_disconnect_minor, 3030 .n_unregister = snd_pcm_oss_unregister_minor, 3031}; 3032 3033static int __init alsa_pcm_oss_init(void) 3034{ 3035 int i; 3036 int err; 3037 3038 /* check device map table */ 3039 for (i = 0; i < SNDRV_CARDS; i++) { 3040 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3041 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 3042 i, dsp_map[i]); 3043 dsp_map[i] = 0; 3044 } 3045 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3046 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 3047 i, adsp_map[i]); 3048 adsp_map[i] = 1; 3049 } 3050 } 3051 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3052 return err; 3053 return 0; 3054} 3055 3056static void __exit alsa_pcm_oss_exit(void) 3057{ 3058 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3059} 3060 3061module_init(alsa_pcm_oss_init) 3062module_exit(alsa_pcm_oss_exit)