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