1 /* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #if 0 23 #define PLUGIN_DEBUG 24 #endif 25 #if 0 26 #define OSS_DEBUG 27 #endif 28 29 #include <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/time.h> 32 #include <linux/vmalloc.h> 33 #include <linux/module.h> 34 #include <linux/math64.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 #include <sound/mixer_oss.h> 45 46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 47 48 static int dsp_map[SNDRV_CARDS]; 49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 50 static bool nonblock_open = 1; 51 52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 54 MODULE_LICENSE("GPL"); 55 module_param_array(dsp_map, int, NULL, 0444); 56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 57 module_param_array(adsp_map, int, NULL, 0444); 58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 59 module_param(nonblock_open, bool, 0644); 60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 63 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 if (max < 0) { 457 kfree(save); 458 return max; 459 } 460 last = 1; 461 } 462 _end: 463 kfree(save); 464 if (last) 465 v = snd_pcm_hw_param_last(pcm, params, var, dir); 466 else 467 v = snd_pcm_hw_param_first(pcm, params, var, dir); 468 snd_BUG_ON(v < 0); 469 return v; 470 } 471 472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 473 snd_pcm_hw_param_t var, unsigned int val, 474 int dir) 475 { 476 int changed; 477 if (hw_is_mask(var)) { 478 struct snd_mask *m = hw_param_mask(params, var); 479 if (val == 0 && dir < 0) { 480 changed = -EINVAL; 481 snd_mask_none(m); 482 } else { 483 if (dir > 0) 484 val++; 485 else if (dir < 0) 486 val--; 487 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 488 } 489 } else if (hw_is_interval(var)) { 490 struct snd_interval *i = hw_param_interval(params, var); 491 if (val == 0 && dir < 0) { 492 changed = -EINVAL; 493 snd_interval_none(i); 494 } else if (dir == 0) 495 changed = snd_interval_refine_set(i, val); 496 else { 497 struct snd_interval t; 498 t.openmin = 1; 499 t.openmax = 1; 500 t.empty = 0; 501 t.integer = 0; 502 if (dir < 0) { 503 t.min = val - 1; 504 t.max = val; 505 } else { 506 t.min = val; 507 t.max = val+1; 508 } 509 changed = snd_interval_refine(i, &t); 510 } 511 } else 512 return -EINVAL; 513 if (changed) { 514 params->cmask |= 1 << var; 515 params->rmask |= 1 << var; 516 } 517 return changed; 518 } 519 520 /** 521 * snd_pcm_hw_param_set 522 * @pcm: PCM instance 523 * @params: the hw_params instance 524 * @var: parameter to retrieve 525 * @val: value to set 526 * @dir: pointer to the direction (-1,0,1) or NULL 527 * 528 * Inside configuration space defined by PARAMS remove from PAR all 529 * values != VAL. Reduce configuration space accordingly. 530 * Return VAL or -EINVAL if the configuration space is empty 531 */ 532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 533 struct snd_pcm_hw_params *params, 534 snd_pcm_hw_param_t var, unsigned int val, 535 int dir) 536 { 537 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 538 if (changed < 0) 539 return changed; 540 if (params->rmask) { 541 int err = snd_pcm_hw_refine(pcm, params); 542 if (err < 0) 543 return err; 544 } 545 return snd_pcm_hw_param_value(params, var, NULL); 546 } 547 548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 549 snd_pcm_hw_param_t var) 550 { 551 int changed; 552 changed = snd_interval_setinteger(hw_param_interval(params, var)); 553 if (changed) { 554 params->cmask |= 1 << var; 555 params->rmask |= 1 << var; 556 } 557 return changed; 558 } 559 560 /* 561 * plugin 562 */ 563 564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 566 { 567 struct snd_pcm_runtime *runtime = substream->runtime; 568 struct snd_pcm_plugin *plugin, *next; 569 570 plugin = runtime->oss.plugin_first; 571 while (plugin) { 572 next = plugin->next; 573 snd_pcm_plugin_free(plugin); 574 plugin = next; 575 } 576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 577 return 0; 578 } 579 580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 581 { 582 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 583 plugin->next = runtime->oss.plugin_first; 584 plugin->prev = NULL; 585 if (runtime->oss.plugin_first) { 586 runtime->oss.plugin_first->prev = plugin; 587 runtime->oss.plugin_first = plugin; 588 } else { 589 runtime->oss.plugin_last = 590 runtime->oss.plugin_first = plugin; 591 } 592 return 0; 593 } 594 595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 596 { 597 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 598 plugin->next = NULL; 599 plugin->prev = runtime->oss.plugin_last; 600 if (runtime->oss.plugin_last) { 601 runtime->oss.plugin_last->next = plugin; 602 runtime->oss.plugin_last = plugin; 603 } else { 604 runtime->oss.plugin_last = 605 runtime->oss.plugin_first = plugin; 606 } 607 return 0; 608 } 609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 610 611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 612 { 613 struct snd_pcm_runtime *runtime = substream->runtime; 614 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 615 long bytes = frames_to_bytes(runtime, frames); 616 if (buffer_size == runtime->oss.buffer_bytes) 617 return bytes; 618 #if BITS_PER_LONG >= 64 619 return runtime->oss.buffer_bytes * bytes / buffer_size; 620 #else 621 { 622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 623 return div_u64(bsize, buffer_size); 624 } 625 #endif 626 } 627 628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 629 { 630 struct snd_pcm_runtime *runtime = substream->runtime; 631 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 632 if (buffer_size == runtime->oss.buffer_bytes) 633 return bytes_to_frames(runtime, bytes); 634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 635 } 636 637 static inline 638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 639 { 640 return runtime->hw_ptr_interrupt; 641 } 642 643 /* define extended formats in the recent OSS versions (if any) */ 644 /* linear formats */ 645 #define AFMT_S32_LE 0x00001000 646 #define AFMT_S32_BE 0x00002000 647 #define AFMT_S24_LE 0x00008000 648 #define AFMT_S24_BE 0x00010000 649 #define AFMT_S24_PACKED 0x00040000 650 651 /* other supported formats */ 652 #define AFMT_FLOAT 0x00004000 653 #define AFMT_SPDIF_RAW 0x00020000 654 655 /* unsupported formats */ 656 #define AFMT_AC3 0x00000400 657 #define AFMT_VORBIS 0x00000800 658 659 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 660 { 661 switch (format) { 662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 679 default: return SNDRV_PCM_FORMAT_U8; 680 } 681 } 682 683 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 684 { 685 switch (format) { 686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 703 default: return -EINVAL; 704 } 705 } 706 707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 708 struct snd_pcm_hw_params *oss_params, 709 struct snd_pcm_hw_params *slave_params) 710 { 711 size_t s; 712 size_t oss_buffer_size, oss_period_size, oss_periods; 713 size_t min_period_size, max_period_size; 714 struct snd_pcm_runtime *runtime = substream->runtime; 715 size_t oss_frame_size; 716 717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 718 params_channels(oss_params) / 8; 719 720 oss_buffer_size = snd_pcm_plug_client_size(substream, 721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 722 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 723 if (atomic_read(&substream->mmap_count)) { 724 if (oss_buffer_size > runtime->oss.mmap_bytes) 725 oss_buffer_size = runtime->oss.mmap_bytes; 726 } 727 728 if (substream->oss.setup.period_size > 16) 729 oss_period_size = substream->oss.setup.period_size; 730 else if (runtime->oss.fragshift) { 731 oss_period_size = 1 << runtime->oss.fragshift; 732 if (oss_period_size > oss_buffer_size / 2) 733 oss_period_size = oss_buffer_size / 2; 734 } else { 735 int sd; 736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 737 738 oss_period_size = oss_buffer_size; 739 do { 740 oss_period_size /= 2; 741 } while (oss_period_size > bytes_per_sec); 742 if (runtime->oss.subdivision == 0) { 743 sd = 4; 744 if (oss_period_size / sd > 4096) 745 sd *= 2; 746 if (oss_period_size / sd < 4096) 747 sd = 1; 748 } else 749 sd = runtime->oss.subdivision; 750 oss_period_size /= sd; 751 if (oss_period_size < 16) 752 oss_period_size = 16; 753 } 754 755 min_period_size = snd_pcm_plug_client_size(substream, 756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 757 min_period_size *= oss_frame_size; 758 min_period_size = roundup_pow_of_two(min_period_size); 759 if (oss_period_size < min_period_size) 760 oss_period_size = min_period_size; 761 762 max_period_size = snd_pcm_plug_client_size(substream, 763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 764 max_period_size *= oss_frame_size; 765 max_period_size = rounddown_pow_of_two(max_period_size); 766 if (oss_period_size > max_period_size) 767 oss_period_size = max_period_size; 768 769 oss_periods = oss_buffer_size / oss_period_size; 770 771 if (substream->oss.setup.periods > 1) 772 oss_periods = substream->oss.setup.periods; 773 774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 776 s = runtime->oss.maxfrags; 777 if (oss_periods > s) 778 oss_periods = s; 779 780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 781 if (s < 2) 782 s = 2; 783 if (oss_periods < s) 784 oss_periods = s; 785 786 while (oss_period_size * oss_periods > oss_buffer_size) 787 oss_period_size /= 2; 788 789 if (oss_period_size < 16) 790 return -EINVAL; 791 runtime->oss.period_bytes = oss_period_size; 792 runtime->oss.period_frames = 1; 793 runtime->oss.periods = oss_periods; 794 return 0; 795 } 796 797 static int choose_rate(struct snd_pcm_substream *substream, 798 struct snd_pcm_hw_params *params, unsigned int best_rate) 799 { 800 struct snd_interval *it; 801 struct snd_pcm_hw_params *save; 802 unsigned int rate, prev; 803 804 save = kmalloc(sizeof(*save), GFP_KERNEL); 805 if (save == NULL) 806 return -ENOMEM; 807 *save = *params; 808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 809 810 /* try multiples of the best rate */ 811 rate = best_rate; 812 for (;;) { 813 if (it->max < rate || (it->max == rate && it->openmax)) 814 break; 815 if (it->min < rate || (it->min == rate && !it->openmin)) { 816 int ret; 817 ret = snd_pcm_hw_param_set(substream, params, 818 SNDRV_PCM_HW_PARAM_RATE, 819 rate, 0); 820 if (ret == (int)rate) { 821 kfree(save); 822 return rate; 823 } 824 *params = *save; 825 } 826 prev = rate; 827 rate += best_rate; 828 if (rate <= prev) 829 break; 830 } 831 832 /* not found, use the nearest rate */ 833 kfree(save); 834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 835 } 836 837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 838 { 839 struct snd_pcm_runtime *runtime = substream->runtime; 840 struct snd_pcm_hw_params *params, *sparams; 841 struct snd_pcm_sw_params *sw_params; 842 ssize_t oss_buffer_size, oss_period_size; 843 size_t oss_frame_size; 844 int err; 845 int direct; 846 snd_pcm_format_t format, sformat; 847 int n; 848 struct snd_mask sformat_mask; 849 struct snd_mask mask; 850 851 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 852 return -EINTR; 853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 854 params = kmalloc(sizeof(*params), GFP_KERNEL); 855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 856 if (!sw_params || !params || !sparams) { 857 err = -ENOMEM; 858 goto failure; 859 } 860 861 if (atomic_read(&substream->mmap_count)) 862 direct = 1; 863 else 864 direct = substream->oss.setup.direct; 865 866 _snd_pcm_hw_params_any(sparams); 867 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 868 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 869 snd_mask_none(&mask); 870 if (atomic_read(&substream->mmap_count)) 871 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 872 else { 873 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 874 if (!direct) 875 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 876 } 877 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 878 if (err < 0) { 879 pcm_dbg(substream->pcm, "No usable accesses\n"); 880 err = -EINVAL; 881 goto failure; 882 } 883 choose_rate(substream, sparams, runtime->oss.rate); 884 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 885 886 format = snd_pcm_oss_format_from(runtime->oss.format); 887 888 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 889 if (direct) 890 sformat = format; 891 else 892 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 893 894 if ((__force int)sformat < 0 || 895 !snd_mask_test(&sformat_mask, (__force int)sformat)) { 896 for (sformat = (__force snd_pcm_format_t)0; 897 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 898 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 899 if (snd_mask_test(&sformat_mask, (__force int)sformat) && 900 snd_pcm_oss_format_to(sformat) >= 0) 901 break; 902 } 903 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 904 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 905 err = -EINVAL; 906 goto failure; 907 } 908 } 909 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 910 if (err < 0) 911 goto failure; 912 913 if (direct) { 914 memcpy(params, sparams, sizeof(*params)); 915 } else { 916 _snd_pcm_hw_params_any(params); 917 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 918 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 919 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 920 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 921 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 922 runtime->oss.channels, 0); 923 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 924 runtime->oss.rate, 0); 925 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 926 params_access(params), params_format(params), 927 params_channels(params), params_rate(params)); 928 } 929 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 930 params_access(sparams), params_format(sparams), 931 params_channels(sparams), params_rate(sparams)); 932 933 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 934 params_channels(params) / 8; 935 936 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 937 snd_pcm_oss_plugin_clear(substream); 938 if (!direct) { 939 /* add necessary plugins */ 940 snd_pcm_oss_plugin_clear(substream); 941 if ((err = snd_pcm_plug_format_plugins(substream, 942 params, 943 sparams)) < 0) { 944 pcm_dbg(substream->pcm, 945 "snd_pcm_plug_format_plugins failed: %i\n", err); 946 snd_pcm_oss_plugin_clear(substream); 947 goto failure; 948 } 949 if (runtime->oss.plugin_first) { 950 struct snd_pcm_plugin *plugin; 951 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 952 pcm_dbg(substream->pcm, 953 "snd_pcm_plugin_build_io failed: %i\n", err); 954 snd_pcm_oss_plugin_clear(substream); 955 goto failure; 956 } 957 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 958 err = snd_pcm_plugin_append(plugin); 959 } else { 960 err = snd_pcm_plugin_insert(plugin); 961 } 962 if (err < 0) { 963 snd_pcm_oss_plugin_clear(substream); 964 goto failure; 965 } 966 } 967 } 968 #endif 969 970 err = snd_pcm_oss_period_size(substream, params, sparams); 971 if (err < 0) 972 goto failure; 973 974 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 975 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 976 if (err < 0) 977 goto failure; 978 979 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 980 runtime->oss.periods, NULL); 981 if (err < 0) 982 goto failure; 983 984 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 985 986 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 987 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 988 goto failure; 989 } 990 991 memset(sw_params, 0, sizeof(*sw_params)); 992 if (runtime->oss.trigger) { 993 sw_params->start_threshold = 1; 994 } else { 995 sw_params->start_threshold = runtime->boundary; 996 } 997 if (atomic_read(&substream->mmap_count) || 998 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 999 sw_params->stop_threshold = runtime->boundary; 1000 else 1001 sw_params->stop_threshold = runtime->buffer_size; 1002 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1003 sw_params->period_step = 1; 1004 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1005 1 : runtime->period_size; 1006 if (atomic_read(&substream->mmap_count) || 1007 substream->oss.setup.nosilence) { 1008 sw_params->silence_threshold = 0; 1009 sw_params->silence_size = 0; 1010 } else { 1011 snd_pcm_uframes_t frames; 1012 frames = runtime->period_size + 16; 1013 if (frames > runtime->buffer_size) 1014 frames = runtime->buffer_size; 1015 sw_params->silence_threshold = frames; 1016 sw_params->silence_size = frames; 1017 } 1018 1019 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1020 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1021 goto failure; 1022 } 1023 1024 runtime->oss.periods = params_periods(sparams); 1025 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1026 if (oss_period_size < 0) { 1027 err = -EINVAL; 1028 goto failure; 1029 } 1030 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1031 if (runtime->oss.plugin_first) { 1032 err = snd_pcm_plug_alloc(substream, oss_period_size); 1033 if (err < 0) 1034 goto failure; 1035 } 1036 #endif 1037 oss_period_size *= oss_frame_size; 1038 1039 oss_buffer_size = oss_period_size * runtime->oss.periods; 1040 if (oss_buffer_size < 0) { 1041 err = -EINVAL; 1042 goto failure; 1043 } 1044 1045 runtime->oss.period_bytes = oss_period_size; 1046 runtime->oss.buffer_bytes = oss_buffer_size; 1047 1048 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1049 runtime->oss.period_bytes, 1050 runtime->oss.buffer_bytes); 1051 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1052 params_period_size(sparams), 1053 params_buffer_size(sparams)); 1054 1055 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1056 runtime->oss.channels = params_channels(params); 1057 runtime->oss.rate = params_rate(params); 1058 1059 vfree(runtime->oss.buffer); 1060 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1061 if (!runtime->oss.buffer) { 1062 err = -ENOMEM; 1063 goto failure; 1064 } 1065 1066 runtime->oss.params = 0; 1067 runtime->oss.prepare = 1; 1068 runtime->oss.buffer_used = 0; 1069 if (runtime->dma_area) 1070 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1071 1072 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1073 1074 err = 0; 1075 failure: 1076 kfree(sw_params); 1077 kfree(params); 1078 kfree(sparams); 1079 mutex_unlock(&runtime->oss.params_lock); 1080 return err; 1081 } 1082 1083 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1084 { 1085 int idx, err; 1086 struct snd_pcm_substream *asubstream = NULL, *substream; 1087 1088 for (idx = 0; idx < 2; idx++) { 1089 substream = pcm_oss_file->streams[idx]; 1090 if (substream == NULL) 1091 continue; 1092 if (asubstream == NULL) 1093 asubstream = substream; 1094 if (substream->runtime->oss.params) { 1095 err = snd_pcm_oss_change_params(substream); 1096 if (err < 0) 1097 return err; 1098 } 1099 } 1100 if (!asubstream) 1101 return -EIO; 1102 if (r_substream) 1103 *r_substream = asubstream; 1104 return 0; 1105 } 1106 1107 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1108 { 1109 int err; 1110 struct snd_pcm_runtime *runtime = substream->runtime; 1111 1112 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1113 if (err < 0) { 1114 pcm_dbg(substream->pcm, 1115 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1116 return err; 1117 } 1118 runtime->oss.prepare = 0; 1119 runtime->oss.prev_hw_ptr_period = 0; 1120 runtime->oss.period_ptr = 0; 1121 runtime->oss.buffer_used = 0; 1122 1123 return 0; 1124 } 1125 1126 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1127 { 1128 struct snd_pcm_runtime *runtime; 1129 int err; 1130 1131 if (substream == NULL) 1132 return 0; 1133 runtime = substream->runtime; 1134 if (runtime->oss.params) { 1135 err = snd_pcm_oss_change_params(substream); 1136 if (err < 0) 1137 return err; 1138 } 1139 if (runtime->oss.prepare) { 1140 err = snd_pcm_oss_prepare(substream); 1141 if (err < 0) 1142 return err; 1143 } 1144 return 0; 1145 } 1146 1147 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1148 { 1149 struct snd_pcm_runtime *runtime; 1150 snd_pcm_uframes_t frames; 1151 int err = 0; 1152 1153 while (1) { 1154 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1155 if (err < 0) 1156 break; 1157 runtime = substream->runtime; 1158 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1159 break; 1160 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1161 /* until avail(delay) <= buffer_size */ 1162 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1163 frames /= runtime->period_size; 1164 frames *= runtime->period_size; 1165 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1166 if (err < 0) 1167 break; 1168 } 1169 return err; 1170 } 1171 1172 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1173 { 1174 struct snd_pcm_runtime *runtime = substream->runtime; 1175 int ret; 1176 while (1) { 1177 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1178 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1179 #ifdef OSS_DEBUG 1180 pcm_dbg(substream->pcm, 1181 "pcm_oss: write: recovering from %s\n", 1182 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1183 "XRUN" : "SUSPEND"); 1184 #endif 1185 ret = snd_pcm_oss_prepare(substream); 1186 if (ret < 0) 1187 break; 1188 } 1189 if (in_kernel) { 1190 mm_segment_t fs; 1191 fs = snd_enter_user(); 1192 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1193 snd_leave_user(fs); 1194 } else { 1195 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1196 } 1197 if (ret != -EPIPE && ret != -ESTRPIPE) 1198 break; 1199 /* test, if we can't store new data, because the stream */ 1200 /* has not been started */ 1201 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1202 return -EAGAIN; 1203 } 1204 return ret; 1205 } 1206 1207 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1208 { 1209 struct snd_pcm_runtime *runtime = substream->runtime; 1210 snd_pcm_sframes_t delay; 1211 int ret; 1212 while (1) { 1213 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1214 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1215 #ifdef OSS_DEBUG 1216 pcm_dbg(substream->pcm, 1217 "pcm_oss: read: recovering from %s\n", 1218 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1219 "XRUN" : "SUSPEND"); 1220 #endif 1221 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1222 if (ret < 0) 1223 break; 1224 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1225 ret = snd_pcm_oss_prepare(substream); 1226 if (ret < 0) 1227 break; 1228 } 1229 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1230 if (ret < 0) 1231 break; 1232 if (in_kernel) { 1233 mm_segment_t fs; 1234 fs = snd_enter_user(); 1235 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1236 snd_leave_user(fs); 1237 } else { 1238 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1239 } 1240 if (ret == -EPIPE) { 1241 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1242 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1243 if (ret < 0) 1244 break; 1245 } 1246 continue; 1247 } 1248 if (ret != -ESTRPIPE) 1249 break; 1250 } 1251 return ret; 1252 } 1253 1254 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1255 { 1256 struct snd_pcm_runtime *runtime = substream->runtime; 1257 int ret; 1258 while (1) { 1259 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1260 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1261 #ifdef OSS_DEBUG 1262 pcm_dbg(substream->pcm, 1263 "pcm_oss: writev: recovering from %s\n", 1264 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1265 "XRUN" : "SUSPEND"); 1266 #endif 1267 ret = snd_pcm_oss_prepare(substream); 1268 if (ret < 0) 1269 break; 1270 } 1271 if (in_kernel) { 1272 mm_segment_t fs; 1273 fs = snd_enter_user(); 1274 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1275 snd_leave_user(fs); 1276 } else { 1277 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1278 } 1279 if (ret != -EPIPE && ret != -ESTRPIPE) 1280 break; 1281 1282 /* test, if we can't store new data, because the stream */ 1283 /* has not been started */ 1284 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1285 return -EAGAIN; 1286 } 1287 return ret; 1288 } 1289 1290 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1291 { 1292 struct snd_pcm_runtime *runtime = substream->runtime; 1293 int ret; 1294 while (1) { 1295 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1296 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1297 #ifdef OSS_DEBUG 1298 pcm_dbg(substream->pcm, 1299 "pcm_oss: readv: recovering from %s\n", 1300 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1301 "XRUN" : "SUSPEND"); 1302 #endif 1303 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1304 if (ret < 0) 1305 break; 1306 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1307 ret = snd_pcm_oss_prepare(substream); 1308 if (ret < 0) 1309 break; 1310 } 1311 if (in_kernel) { 1312 mm_segment_t fs; 1313 fs = snd_enter_user(); 1314 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1315 snd_leave_user(fs); 1316 } else { 1317 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1318 } 1319 if (ret != -EPIPE && ret != -ESTRPIPE) 1320 break; 1321 } 1322 return ret; 1323 } 1324 1325 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1326 { 1327 struct snd_pcm_runtime *runtime = substream->runtime; 1328 snd_pcm_sframes_t frames, frames1; 1329 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1330 if (runtime->oss.plugin_first) { 1331 struct snd_pcm_plugin_channel *channels; 1332 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1333 if (!in_kernel) { 1334 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1335 return -EFAULT; 1336 buf = runtime->oss.buffer; 1337 } 1338 frames = bytes / oss_frame_bytes; 1339 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1340 if (frames1 < 0) 1341 return frames1; 1342 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1343 if (frames1 <= 0) 1344 return frames1; 1345 bytes = frames1 * oss_frame_bytes; 1346 } else 1347 #endif 1348 { 1349 frames = bytes_to_frames(runtime, bytes); 1350 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1351 if (frames1 <= 0) 1352 return frames1; 1353 bytes = frames_to_bytes(runtime, frames1); 1354 } 1355 return bytes; 1356 } 1357 1358 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1359 { 1360 size_t xfer = 0; 1361 ssize_t tmp; 1362 struct snd_pcm_runtime *runtime = substream->runtime; 1363 1364 if (atomic_read(&substream->mmap_count)) 1365 return -ENXIO; 1366 1367 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1368 return tmp; 1369 mutex_lock(&runtime->oss.params_lock); 1370 while (bytes > 0) { 1371 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1372 tmp = bytes; 1373 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1374 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1375 if (tmp > 0) { 1376 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1377 tmp = -EFAULT; 1378 goto err; 1379 } 1380 } 1381 runtime->oss.buffer_used += tmp; 1382 buf += tmp; 1383 bytes -= tmp; 1384 xfer += tmp; 1385 if (substream->oss.setup.partialfrag || 1386 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1387 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1388 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1389 if (tmp <= 0) 1390 goto err; 1391 runtime->oss.bytes += tmp; 1392 runtime->oss.period_ptr += tmp; 1393 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1394 if (runtime->oss.period_ptr == 0 || 1395 runtime->oss.period_ptr == runtime->oss.buffer_used) 1396 runtime->oss.buffer_used = 0; 1397 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1398 tmp = -EAGAIN; 1399 goto err; 1400 } 1401 } 1402 } else { 1403 tmp = snd_pcm_oss_write2(substream, 1404 (const char __force *)buf, 1405 runtime->oss.period_bytes, 0); 1406 if (tmp <= 0) 1407 goto err; 1408 runtime->oss.bytes += tmp; 1409 buf += tmp; 1410 bytes -= tmp; 1411 xfer += tmp; 1412 if ((substream->f_flags & O_NONBLOCK) != 0 && 1413 tmp != runtime->oss.period_bytes) 1414 break; 1415 } 1416 } 1417 mutex_unlock(&runtime->oss.params_lock); 1418 return xfer; 1419 1420 err: 1421 mutex_unlock(&runtime->oss.params_lock); 1422 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1423 } 1424 1425 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1426 { 1427 struct snd_pcm_runtime *runtime = substream->runtime; 1428 snd_pcm_sframes_t frames, frames1; 1429 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1430 char __user *final_dst = (char __force __user *)buf; 1431 if (runtime->oss.plugin_first) { 1432 struct snd_pcm_plugin_channel *channels; 1433 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1434 if (!in_kernel) 1435 buf = runtime->oss.buffer; 1436 frames = bytes / oss_frame_bytes; 1437 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1438 if (frames1 < 0) 1439 return frames1; 1440 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1441 if (frames1 <= 0) 1442 return frames1; 1443 bytes = frames1 * oss_frame_bytes; 1444 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1445 return -EFAULT; 1446 } else 1447 #endif 1448 { 1449 frames = bytes_to_frames(runtime, bytes); 1450 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1451 if (frames1 <= 0) 1452 return frames1; 1453 bytes = frames_to_bytes(runtime, frames1); 1454 } 1455 return bytes; 1456 } 1457 1458 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1459 { 1460 size_t xfer = 0; 1461 ssize_t tmp; 1462 struct snd_pcm_runtime *runtime = substream->runtime; 1463 1464 if (atomic_read(&substream->mmap_count)) 1465 return -ENXIO; 1466 1467 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1468 return tmp; 1469 mutex_lock(&runtime->oss.params_lock); 1470 while (bytes > 0) { 1471 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1472 if (runtime->oss.buffer_used == 0) { 1473 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1474 if (tmp <= 0) 1475 goto err; 1476 runtime->oss.bytes += tmp; 1477 runtime->oss.period_ptr = tmp; 1478 runtime->oss.buffer_used = tmp; 1479 } 1480 tmp = bytes; 1481 if ((size_t) tmp > runtime->oss.buffer_used) 1482 tmp = runtime->oss.buffer_used; 1483 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1484 tmp = -EFAULT; 1485 goto err; 1486 } 1487 buf += tmp; 1488 bytes -= tmp; 1489 xfer += tmp; 1490 runtime->oss.buffer_used -= tmp; 1491 } else { 1492 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1493 runtime->oss.period_bytes, 0); 1494 if (tmp <= 0) 1495 goto err; 1496 runtime->oss.bytes += tmp; 1497 buf += tmp; 1498 bytes -= tmp; 1499 xfer += tmp; 1500 } 1501 } 1502 mutex_unlock(&runtime->oss.params_lock); 1503 return xfer; 1504 1505 err: 1506 mutex_unlock(&runtime->oss.params_lock); 1507 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1508 } 1509 1510 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1511 { 1512 struct snd_pcm_substream *substream; 1513 struct snd_pcm_runtime *runtime; 1514 int i; 1515 1516 for (i = 0; i < 2; i++) { 1517 substream = pcm_oss_file->streams[i]; 1518 if (!substream) 1519 continue; 1520 runtime = substream->runtime; 1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1522 runtime->oss.prepare = 1; 1523 runtime->oss.buffer_used = 0; 1524 runtime->oss.prev_hw_ptr_period = 0; 1525 runtime->oss.period_ptr = 0; 1526 } 1527 return 0; 1528 } 1529 1530 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1531 { 1532 struct snd_pcm_substream *substream; 1533 int err; 1534 1535 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1536 if (substream != NULL) { 1537 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1538 return err; 1539 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1540 } 1541 /* note: all errors from the start action are ignored */ 1542 /* OSS apps do not know, how to handle them */ 1543 return 0; 1544 } 1545 1546 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1547 { 1548 struct snd_pcm_runtime *runtime; 1549 ssize_t result = 0; 1550 snd_pcm_state_t state; 1551 long res; 1552 wait_queue_t wait; 1553 1554 runtime = substream->runtime; 1555 init_waitqueue_entry(&wait, current); 1556 add_wait_queue(&runtime->sleep, &wait); 1557 #ifdef OSS_DEBUG 1558 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1559 #endif 1560 while (1) { 1561 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1562 if (result > 0) { 1563 runtime->oss.buffer_used = 0; 1564 result = 0; 1565 break; 1566 } 1567 if (result != 0 && result != -EAGAIN) 1568 break; 1569 result = 0; 1570 set_current_state(TASK_INTERRUPTIBLE); 1571 snd_pcm_stream_lock_irq(substream); 1572 state = runtime->status->state; 1573 snd_pcm_stream_unlock_irq(substream); 1574 if (state != SNDRV_PCM_STATE_RUNNING) { 1575 set_current_state(TASK_RUNNING); 1576 break; 1577 } 1578 res = schedule_timeout(10 * HZ); 1579 if (signal_pending(current)) { 1580 result = -ERESTARTSYS; 1581 break; 1582 } 1583 if (res == 0) { 1584 pcm_err(substream->pcm, 1585 "OSS sync error - DMA timeout\n"); 1586 result = -EIO; 1587 break; 1588 } 1589 } 1590 remove_wait_queue(&runtime->sleep, &wait); 1591 return result; 1592 } 1593 1594 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1595 { 1596 int err = 0; 1597 unsigned int saved_f_flags; 1598 struct snd_pcm_substream *substream; 1599 struct snd_pcm_runtime *runtime; 1600 snd_pcm_format_t format; 1601 unsigned long width; 1602 size_t size; 1603 1604 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1605 if (substream != NULL) { 1606 runtime = substream->runtime; 1607 if (atomic_read(&substream->mmap_count)) 1608 goto __direct; 1609 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1610 return err; 1611 format = snd_pcm_oss_format_from(runtime->oss.format); 1612 width = snd_pcm_format_physical_width(format); 1613 mutex_lock(&runtime->oss.params_lock); 1614 if (runtime->oss.buffer_used > 0) { 1615 #ifdef OSS_DEBUG 1616 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1617 #endif 1618 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1619 snd_pcm_format_set_silence(format, 1620 runtime->oss.buffer + runtime->oss.buffer_used, 1621 size); 1622 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1623 if (err < 0) { 1624 mutex_unlock(&runtime->oss.params_lock); 1625 return err; 1626 } 1627 } else if (runtime->oss.period_ptr > 0) { 1628 #ifdef OSS_DEBUG 1629 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1630 #endif 1631 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1632 snd_pcm_format_set_silence(format, 1633 runtime->oss.buffer, 1634 size * 8 / width); 1635 err = snd_pcm_oss_sync1(substream, size); 1636 if (err < 0) { 1637 mutex_unlock(&runtime->oss.params_lock); 1638 return err; 1639 } 1640 } 1641 /* 1642 * The ALSA's period might be a bit large than OSS one. 1643 * Fill the remain portion of ALSA period with zeros. 1644 */ 1645 size = runtime->control->appl_ptr % runtime->period_size; 1646 if (size > 0) { 1647 size = runtime->period_size - size; 1648 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1649 size = (runtime->frame_bits * size) / 8; 1650 while (size > 0) { 1651 mm_segment_t fs; 1652 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1653 size -= size1; 1654 size1 *= 8; 1655 size1 /= runtime->sample_bits; 1656 snd_pcm_format_set_silence(runtime->format, 1657 runtime->oss.buffer, 1658 size1); 1659 size1 /= runtime->channels; /* frames */ 1660 fs = snd_enter_user(); 1661 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1); 1662 snd_leave_user(fs); 1663 } 1664 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1665 void __user *buffers[runtime->channels]; 1666 memset(buffers, 0, runtime->channels * sizeof(void *)); 1667 snd_pcm_lib_writev(substream, buffers, size); 1668 } 1669 } 1670 mutex_unlock(&runtime->oss.params_lock); 1671 /* 1672 * finish sync: drain the buffer 1673 */ 1674 __direct: 1675 saved_f_flags = substream->f_flags; 1676 substream->f_flags &= ~O_NONBLOCK; 1677 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1678 substream->f_flags = saved_f_flags; 1679 if (err < 0) 1680 return err; 1681 runtime->oss.prepare = 1; 1682 } 1683 1684 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1685 if (substream != NULL) { 1686 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1687 return err; 1688 runtime = substream->runtime; 1689 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1690 if (err < 0) 1691 return err; 1692 runtime->oss.buffer_used = 0; 1693 runtime->oss.prepare = 1; 1694 } 1695 return 0; 1696 } 1697 1698 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1699 { 1700 int idx; 1701 1702 for (idx = 1; idx >= 0; --idx) { 1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1704 struct snd_pcm_runtime *runtime; 1705 if (substream == NULL) 1706 continue; 1707 runtime = substream->runtime; 1708 if (rate < 1000) 1709 rate = 1000; 1710 else if (rate > 192000) 1711 rate = 192000; 1712 if (runtime->oss.rate != rate) { 1713 runtime->oss.params = 1; 1714 runtime->oss.rate = rate; 1715 } 1716 } 1717 return snd_pcm_oss_get_rate(pcm_oss_file); 1718 } 1719 1720 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1721 { 1722 struct snd_pcm_substream *substream; 1723 int err; 1724 1725 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1726 return err; 1727 return substream->runtime->oss.rate; 1728 } 1729 1730 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1731 { 1732 int idx; 1733 if (channels < 1) 1734 channels = 1; 1735 if (channels > 128) 1736 return -EINVAL; 1737 for (idx = 1; idx >= 0; --idx) { 1738 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1739 struct snd_pcm_runtime *runtime; 1740 if (substream == NULL) 1741 continue; 1742 runtime = substream->runtime; 1743 if (runtime->oss.channels != channels) { 1744 runtime->oss.params = 1; 1745 runtime->oss.channels = channels; 1746 } 1747 } 1748 return snd_pcm_oss_get_channels(pcm_oss_file); 1749 } 1750 1751 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1752 { 1753 struct snd_pcm_substream *substream; 1754 int err; 1755 1756 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1757 return err; 1758 return substream->runtime->oss.channels; 1759 } 1760 1761 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1762 { 1763 struct snd_pcm_substream *substream; 1764 int err; 1765 1766 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1767 return err; 1768 return substream->runtime->oss.period_bytes; 1769 } 1770 1771 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1772 { 1773 struct snd_pcm_substream *substream; 1774 int err; 1775 int direct; 1776 struct snd_pcm_hw_params *params; 1777 unsigned int formats = 0; 1778 struct snd_mask format_mask; 1779 int fmt; 1780 1781 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1782 return err; 1783 if (atomic_read(&substream->mmap_count)) 1784 direct = 1; 1785 else 1786 direct = substream->oss.setup.direct; 1787 if (!direct) 1788 return AFMT_MU_LAW | AFMT_U8 | 1789 AFMT_S16_LE | AFMT_S16_BE | 1790 AFMT_S8 | AFMT_U16_LE | 1791 AFMT_U16_BE | 1792 AFMT_S32_LE | AFMT_S32_BE | 1793 AFMT_S24_LE | AFMT_S24_BE | 1794 AFMT_S24_PACKED; 1795 params = kmalloc(sizeof(*params), GFP_KERNEL); 1796 if (!params) 1797 return -ENOMEM; 1798 _snd_pcm_hw_params_any(params); 1799 err = snd_pcm_hw_refine(substream, params); 1800 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1801 kfree(params); 1802 if (err < 0) 1803 return err; 1804 for (fmt = 0; fmt < 32; ++fmt) { 1805 if (snd_mask_test(&format_mask, fmt)) { 1806 int f = snd_pcm_oss_format_to(fmt); 1807 if (f >= 0) 1808 formats |= f; 1809 } 1810 } 1811 return formats; 1812 } 1813 1814 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1815 { 1816 int formats, idx; 1817 1818 if (format != AFMT_QUERY) { 1819 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1820 if (formats < 0) 1821 return formats; 1822 if (!(formats & format)) 1823 format = AFMT_U8; 1824 for (idx = 1; idx >= 0; --idx) { 1825 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1826 struct snd_pcm_runtime *runtime; 1827 if (substream == NULL) 1828 continue; 1829 runtime = substream->runtime; 1830 if (runtime->oss.format != format) { 1831 runtime->oss.params = 1; 1832 runtime->oss.format = format; 1833 } 1834 } 1835 } 1836 return snd_pcm_oss_get_format(pcm_oss_file); 1837 } 1838 1839 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1840 { 1841 struct snd_pcm_substream *substream; 1842 int err; 1843 1844 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1845 return err; 1846 return substream->runtime->oss.format; 1847 } 1848 1849 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1850 { 1851 struct snd_pcm_runtime *runtime; 1852 1853 if (substream == NULL) 1854 return 0; 1855 runtime = substream->runtime; 1856 if (subdivide == 0) { 1857 subdivide = runtime->oss.subdivision; 1858 if (subdivide == 0) 1859 subdivide = 1; 1860 return subdivide; 1861 } 1862 if (runtime->oss.subdivision || runtime->oss.fragshift) 1863 return -EINVAL; 1864 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1865 subdivide != 8 && subdivide != 16) 1866 return -EINVAL; 1867 runtime->oss.subdivision = subdivide; 1868 runtime->oss.params = 1; 1869 return subdivide; 1870 } 1871 1872 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1873 { 1874 int err = -EINVAL, idx; 1875 1876 for (idx = 1; idx >= 0; --idx) { 1877 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1878 if (substream == NULL) 1879 continue; 1880 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1881 return err; 1882 } 1883 return err; 1884 } 1885 1886 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1887 { 1888 struct snd_pcm_runtime *runtime; 1889 1890 if (substream == NULL) 1891 return 0; 1892 runtime = substream->runtime; 1893 if (runtime->oss.subdivision || runtime->oss.fragshift) 1894 return -EINVAL; 1895 runtime->oss.fragshift = val & 0xffff; 1896 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1897 if (runtime->oss.fragshift < 4) /* < 16 */ 1898 runtime->oss.fragshift = 4; 1899 if (runtime->oss.maxfrags < 2) 1900 runtime->oss.maxfrags = 2; 1901 runtime->oss.params = 1; 1902 return 0; 1903 } 1904 1905 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1906 { 1907 int err = -EINVAL, idx; 1908 1909 for (idx = 1; idx >= 0; --idx) { 1910 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1911 if (substream == NULL) 1912 continue; 1913 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1914 return err; 1915 } 1916 return err; 1917 } 1918 1919 static int snd_pcm_oss_nonblock(struct file * file) 1920 { 1921 spin_lock(&file->f_lock); 1922 file->f_flags |= O_NONBLOCK; 1923 spin_unlock(&file->f_lock); 1924 return 0; 1925 } 1926 1927 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1928 { 1929 1930 if (substream == NULL) { 1931 res &= ~DSP_CAP_DUPLEX; 1932 return res; 1933 } 1934 #ifdef DSP_CAP_MULTI 1935 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1936 if (substream->pstr->substream_count > 1) 1937 res |= DSP_CAP_MULTI; 1938 #endif 1939 /* DSP_CAP_REALTIME is set all times: */ 1940 /* all ALSA drivers can return actual pointer in ring buffer */ 1941 #if defined(DSP_CAP_REALTIME) && 0 1942 { 1943 struct snd_pcm_runtime *runtime = substream->runtime; 1944 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1945 res &= ~DSP_CAP_REALTIME; 1946 } 1947 #endif 1948 return res; 1949 } 1950 1951 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1952 { 1953 int result, idx; 1954 1955 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1956 for (idx = 0; idx < 2; idx++) { 1957 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1958 result = snd_pcm_oss_get_caps1(substream, result); 1959 } 1960 result |= 0x0001; /* revision - same as SB AWE 64 */ 1961 return result; 1962 } 1963 1964 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 1965 snd_pcm_uframes_t hw_ptr) 1966 { 1967 struct snd_pcm_runtime *runtime = substream->runtime; 1968 snd_pcm_uframes_t appl_ptr; 1969 appl_ptr = hw_ptr + runtime->buffer_size; 1970 appl_ptr %= runtime->boundary; 1971 runtime->control->appl_ptr = appl_ptr; 1972 } 1973 1974 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1975 { 1976 struct snd_pcm_runtime *runtime; 1977 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1978 int err, cmd; 1979 1980 #ifdef OSS_DEBUG 1981 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 1982 #endif 1983 1984 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1985 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1986 1987 if (psubstream) { 1988 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1989 return err; 1990 } 1991 if (csubstream) { 1992 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1993 return err; 1994 } 1995 if (psubstream) { 1996 runtime = psubstream->runtime; 1997 if (trigger & PCM_ENABLE_OUTPUT) { 1998 if (runtime->oss.trigger) 1999 goto _skip1; 2000 if (atomic_read(&psubstream->mmap_count)) 2001 snd_pcm_oss_simulate_fill(psubstream, 2002 get_hw_ptr_period(runtime)); 2003 runtime->oss.trigger = 1; 2004 runtime->start_threshold = 1; 2005 cmd = SNDRV_PCM_IOCTL_START; 2006 } else { 2007 if (!runtime->oss.trigger) 2008 goto _skip1; 2009 runtime->oss.trigger = 0; 2010 runtime->start_threshold = runtime->boundary; 2011 cmd = SNDRV_PCM_IOCTL_DROP; 2012 runtime->oss.prepare = 1; 2013 } 2014 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2015 if (err < 0) 2016 return err; 2017 } 2018 _skip1: 2019 if (csubstream) { 2020 runtime = csubstream->runtime; 2021 if (trigger & PCM_ENABLE_INPUT) { 2022 if (runtime->oss.trigger) 2023 goto _skip2; 2024 runtime->oss.trigger = 1; 2025 runtime->start_threshold = 1; 2026 cmd = SNDRV_PCM_IOCTL_START; 2027 } else { 2028 if (!runtime->oss.trigger) 2029 goto _skip2; 2030 runtime->oss.trigger = 0; 2031 runtime->start_threshold = runtime->boundary; 2032 cmd = SNDRV_PCM_IOCTL_DROP; 2033 runtime->oss.prepare = 1; 2034 } 2035 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2036 if (err < 0) 2037 return err; 2038 } 2039 _skip2: 2040 return 0; 2041 } 2042 2043 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2044 { 2045 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2046 int result = 0; 2047 2048 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2049 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2050 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2051 result |= PCM_ENABLE_OUTPUT; 2052 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2053 result |= PCM_ENABLE_INPUT; 2054 return result; 2055 } 2056 2057 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2058 { 2059 struct snd_pcm_substream *substream; 2060 struct snd_pcm_runtime *runtime; 2061 snd_pcm_sframes_t delay; 2062 int err; 2063 2064 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2065 if (substream == NULL) 2066 return -EINVAL; 2067 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2068 return err; 2069 runtime = substream->runtime; 2070 if (runtime->oss.params || runtime->oss.prepare) 2071 return 0; 2072 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2073 if (err == -EPIPE) 2074 delay = 0; /* hack for broken OSS applications */ 2075 else if (err < 0) 2076 return err; 2077 return snd_pcm_oss_bytes(substream, delay); 2078 } 2079 2080 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2081 { 2082 struct snd_pcm_substream *substream; 2083 struct snd_pcm_runtime *runtime; 2084 snd_pcm_sframes_t delay; 2085 int fixup; 2086 struct count_info info; 2087 int err; 2088 2089 if (_info == NULL) 2090 return -EFAULT; 2091 substream = pcm_oss_file->streams[stream]; 2092 if (substream == NULL) 2093 return -EINVAL; 2094 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2095 return err; 2096 runtime = substream->runtime; 2097 if (runtime->oss.params || runtime->oss.prepare) { 2098 memset(&info, 0, sizeof(info)); 2099 if (copy_to_user(_info, &info, sizeof(info))) 2100 return -EFAULT; 2101 return 0; 2102 } 2103 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2104 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2105 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2106 err = 0; 2107 delay = 0; 2108 fixup = 0; 2109 } else { 2110 fixup = runtime->oss.buffer_used; 2111 } 2112 } else { 2113 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2114 fixup = -runtime->oss.buffer_used; 2115 } 2116 if (err < 0) 2117 return err; 2118 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2119 if (atomic_read(&substream->mmap_count)) { 2120 snd_pcm_sframes_t n; 2121 delay = get_hw_ptr_period(runtime); 2122 n = delay - runtime->oss.prev_hw_ptr_period; 2123 if (n < 0) 2124 n += runtime->boundary; 2125 info.blocks = n / runtime->period_size; 2126 runtime->oss.prev_hw_ptr_period = delay; 2127 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2128 snd_pcm_oss_simulate_fill(substream, delay); 2129 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2130 } else { 2131 delay = snd_pcm_oss_bytes(substream, delay); 2132 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2133 if (substream->oss.setup.buggyptr) 2134 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2135 else 2136 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2137 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2138 } else { 2139 delay += fixup; 2140 info.blocks = delay / runtime->oss.period_bytes; 2141 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2142 } 2143 } 2144 if (copy_to_user(_info, &info, sizeof(info))) 2145 return -EFAULT; 2146 return 0; 2147 } 2148 2149 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2150 { 2151 struct snd_pcm_substream *substream; 2152 struct snd_pcm_runtime *runtime; 2153 snd_pcm_sframes_t avail; 2154 int fixup; 2155 struct audio_buf_info info; 2156 int err; 2157 2158 if (_info == NULL) 2159 return -EFAULT; 2160 substream = pcm_oss_file->streams[stream]; 2161 if (substream == NULL) 2162 return -EINVAL; 2163 runtime = substream->runtime; 2164 2165 if (runtime->oss.params && 2166 (err = snd_pcm_oss_change_params(substream)) < 0) 2167 return err; 2168 2169 info.fragsize = runtime->oss.period_bytes; 2170 info.fragstotal = runtime->periods; 2171 if (runtime->oss.prepare) { 2172 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2173 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2174 info.fragments = runtime->oss.periods; 2175 } else { 2176 info.bytes = 0; 2177 info.fragments = 0; 2178 } 2179 } else { 2180 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2181 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2182 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2183 avail = runtime->buffer_size; 2184 err = 0; 2185 fixup = 0; 2186 } else { 2187 avail = runtime->buffer_size - avail; 2188 fixup = -runtime->oss.buffer_used; 2189 } 2190 } else { 2191 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2192 fixup = runtime->oss.buffer_used; 2193 } 2194 if (err < 0) 2195 return err; 2196 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2197 info.fragments = info.bytes / runtime->oss.period_bytes; 2198 } 2199 2200 #ifdef OSS_DEBUG 2201 pcm_dbg(substream->pcm, 2202 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2203 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2204 #endif 2205 if (copy_to_user(_info, &info, sizeof(info))) 2206 return -EFAULT; 2207 return 0; 2208 } 2209 2210 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2211 { 2212 // it won't be probably implemented 2213 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2214 return -EINVAL; 2215 } 2216 2217 static const char *strip_task_path(const char *path) 2218 { 2219 const char *ptr, *ptrl = NULL; 2220 for (ptr = path; *ptr; ptr++) { 2221 if (*ptr == '/') 2222 ptrl = ptr + 1; 2223 } 2224 return ptrl; 2225 } 2226 2227 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2228 const char *task_name, 2229 struct snd_pcm_oss_setup *rsetup) 2230 { 2231 struct snd_pcm_oss_setup *setup; 2232 2233 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2234 do { 2235 for (setup = pcm->streams[stream].oss.setup_list; setup; 2236 setup = setup->next) { 2237 if (!strcmp(setup->task_name, task_name)) 2238 goto out; 2239 } 2240 } while ((task_name = strip_task_path(task_name)) != NULL); 2241 out: 2242 if (setup) 2243 *rsetup = *setup; 2244 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2245 } 2246 2247 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2248 { 2249 struct snd_pcm_runtime *runtime; 2250 runtime = substream->runtime; 2251 vfree(runtime->oss.buffer); 2252 runtime->oss.buffer = NULL; 2253 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2254 snd_pcm_oss_plugin_clear(substream); 2255 #endif 2256 substream->oss.oss = 0; 2257 } 2258 2259 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2260 struct snd_pcm_oss_setup *setup, 2261 int minor) 2262 { 2263 struct snd_pcm_runtime *runtime; 2264 2265 substream->oss.oss = 1; 2266 substream->oss.setup = *setup; 2267 if (setup->nonblock) 2268 substream->f_flags |= O_NONBLOCK; 2269 else if (setup->block) 2270 substream->f_flags &= ~O_NONBLOCK; 2271 runtime = substream->runtime; 2272 runtime->oss.params = 1; 2273 runtime->oss.trigger = 1; 2274 runtime->oss.rate = 8000; 2275 mutex_init(&runtime->oss.params_lock); 2276 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2277 case SNDRV_MINOR_OSS_PCM_8: 2278 runtime->oss.format = AFMT_U8; 2279 break; 2280 case SNDRV_MINOR_OSS_PCM_16: 2281 runtime->oss.format = AFMT_S16_LE; 2282 break; 2283 default: 2284 runtime->oss.format = AFMT_MU_LAW; 2285 } 2286 runtime->oss.channels = 1; 2287 runtime->oss.fragshift = 0; 2288 runtime->oss.maxfrags = 0; 2289 runtime->oss.subdivision = 0; 2290 substream->pcm_release = snd_pcm_oss_release_substream; 2291 } 2292 2293 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2294 { 2295 int cidx; 2296 if (!pcm_oss_file) 2297 return 0; 2298 for (cidx = 0; cidx < 2; ++cidx) { 2299 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2300 if (substream) 2301 snd_pcm_release_substream(substream); 2302 } 2303 kfree(pcm_oss_file); 2304 return 0; 2305 } 2306 2307 static int snd_pcm_oss_open_file(struct file *file, 2308 struct snd_pcm *pcm, 2309 struct snd_pcm_oss_file **rpcm_oss_file, 2310 int minor, 2311 struct snd_pcm_oss_setup *setup) 2312 { 2313 int idx, err; 2314 struct snd_pcm_oss_file *pcm_oss_file; 2315 struct snd_pcm_substream *substream; 2316 fmode_t f_mode = file->f_mode; 2317 2318 if (rpcm_oss_file) 2319 *rpcm_oss_file = NULL; 2320 2321 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2322 if (pcm_oss_file == NULL) 2323 return -ENOMEM; 2324 2325 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2326 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2327 f_mode = FMODE_WRITE; 2328 2329 file->f_flags &= ~O_APPEND; 2330 for (idx = 0; idx < 2; idx++) { 2331 if (setup[idx].disable) 2332 continue; 2333 if (! pcm->streams[idx].substream_count) 2334 continue; /* no matching substream */ 2335 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2336 if (! (f_mode & FMODE_WRITE)) 2337 continue; 2338 } else { 2339 if (! (f_mode & FMODE_READ)) 2340 continue; 2341 } 2342 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2343 if (err < 0) { 2344 snd_pcm_oss_release_file(pcm_oss_file); 2345 return err; 2346 } 2347 2348 pcm_oss_file->streams[idx] = substream; 2349 substream->file = pcm_oss_file; 2350 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2351 } 2352 2353 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2354 snd_pcm_oss_release_file(pcm_oss_file); 2355 return -EINVAL; 2356 } 2357 2358 file->private_data = pcm_oss_file; 2359 if (rpcm_oss_file) 2360 *rpcm_oss_file = pcm_oss_file; 2361 return 0; 2362 } 2363 2364 2365 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2366 { 2367 unsigned int idx; 2368 2369 if (snd_BUG_ON(!task || !name || size < 2)) 2370 return -EINVAL; 2371 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2372 name[idx] = task->comm[idx]; 2373 name[idx] = '\0'; 2374 return 0; 2375 } 2376 2377 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2378 { 2379 int err; 2380 char task_name[32]; 2381 struct snd_pcm *pcm; 2382 struct snd_pcm_oss_file *pcm_oss_file; 2383 struct snd_pcm_oss_setup setup[2]; 2384 int nonblock; 2385 wait_queue_t wait; 2386 2387 err = nonseekable_open(inode, file); 2388 if (err < 0) 2389 return err; 2390 2391 pcm = snd_lookup_oss_minor_data(iminor(inode), 2392 SNDRV_OSS_DEVICE_TYPE_PCM); 2393 if (pcm == NULL) { 2394 err = -ENODEV; 2395 goto __error1; 2396 } 2397 err = snd_card_file_add(pcm->card, file); 2398 if (err < 0) 2399 goto __error1; 2400 if (!try_module_get(pcm->card->module)) { 2401 err = -EFAULT; 2402 goto __error2; 2403 } 2404 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2405 err = -EFAULT; 2406 goto __error; 2407 } 2408 memset(setup, 0, sizeof(setup)); 2409 if (file->f_mode & FMODE_WRITE) 2410 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2411 task_name, &setup[0]); 2412 if (file->f_mode & FMODE_READ) 2413 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2414 task_name, &setup[1]); 2415 2416 nonblock = !!(file->f_flags & O_NONBLOCK); 2417 if (!nonblock) 2418 nonblock = nonblock_open; 2419 2420 init_waitqueue_entry(&wait, current); 2421 add_wait_queue(&pcm->open_wait, &wait); 2422 mutex_lock(&pcm->open_mutex); 2423 while (1) { 2424 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2425 iminor(inode), setup); 2426 if (err >= 0) 2427 break; 2428 if (err == -EAGAIN) { 2429 if (nonblock) { 2430 err = -EBUSY; 2431 break; 2432 } 2433 } else 2434 break; 2435 set_current_state(TASK_INTERRUPTIBLE); 2436 mutex_unlock(&pcm->open_mutex); 2437 schedule(); 2438 mutex_lock(&pcm->open_mutex); 2439 if (pcm->card->shutdown) { 2440 err = -ENODEV; 2441 break; 2442 } 2443 if (signal_pending(current)) { 2444 err = -ERESTARTSYS; 2445 break; 2446 } 2447 } 2448 remove_wait_queue(&pcm->open_wait, &wait); 2449 mutex_unlock(&pcm->open_mutex); 2450 if (err < 0) 2451 goto __error; 2452 snd_card_unref(pcm->card); 2453 return err; 2454 2455 __error: 2456 module_put(pcm->card->module); 2457 __error2: 2458 snd_card_file_remove(pcm->card, file); 2459 __error1: 2460 if (pcm) 2461 snd_card_unref(pcm->card); 2462 return err; 2463 } 2464 2465 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2466 { 2467 struct snd_pcm *pcm; 2468 struct snd_pcm_substream *substream; 2469 struct snd_pcm_oss_file *pcm_oss_file; 2470 2471 pcm_oss_file = file->private_data; 2472 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2473 if (substream == NULL) 2474 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2475 if (snd_BUG_ON(!substream)) 2476 return -ENXIO; 2477 pcm = substream->pcm; 2478 if (!pcm->card->shutdown) 2479 snd_pcm_oss_sync(pcm_oss_file); 2480 mutex_lock(&pcm->open_mutex); 2481 snd_pcm_oss_release_file(pcm_oss_file); 2482 mutex_unlock(&pcm->open_mutex); 2483 wake_up(&pcm->open_wait); 2484 module_put(pcm->card->module); 2485 snd_card_file_remove(pcm->card, file); 2486 return 0; 2487 } 2488 2489 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2490 { 2491 struct snd_pcm_oss_file *pcm_oss_file; 2492 int __user *p = (int __user *)arg; 2493 int res; 2494 2495 pcm_oss_file = file->private_data; 2496 if (cmd == OSS_GETVERSION) 2497 return put_user(SNDRV_OSS_VERSION, p); 2498 if (cmd == OSS_ALSAEMULVER) 2499 return put_user(1, p); 2500 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2501 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2502 struct snd_pcm_substream *substream; 2503 int idx; 2504 for (idx = 0; idx < 2; ++idx) { 2505 substream = pcm_oss_file->streams[idx]; 2506 if (substream != NULL) 2507 break; 2508 } 2509 if (snd_BUG_ON(idx >= 2)) 2510 return -ENXIO; 2511 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2512 } 2513 #endif 2514 if (((cmd >> 8) & 0xff) != 'P') 2515 return -EINVAL; 2516 #ifdef OSS_DEBUG 2517 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2518 #endif 2519 switch (cmd) { 2520 case SNDCTL_DSP_RESET: 2521 return snd_pcm_oss_reset(pcm_oss_file); 2522 case SNDCTL_DSP_SYNC: 2523 return snd_pcm_oss_sync(pcm_oss_file); 2524 case SNDCTL_DSP_SPEED: 2525 if (get_user(res, p)) 2526 return -EFAULT; 2527 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2528 return res; 2529 return put_user(res, p); 2530 case SOUND_PCM_READ_RATE: 2531 res = snd_pcm_oss_get_rate(pcm_oss_file); 2532 if (res < 0) 2533 return res; 2534 return put_user(res, p); 2535 case SNDCTL_DSP_STEREO: 2536 if (get_user(res, p)) 2537 return -EFAULT; 2538 res = res > 0 ? 2 : 1; 2539 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2540 return res; 2541 return put_user(--res, p); 2542 case SNDCTL_DSP_GETBLKSIZE: 2543 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2544 if (res < 0) 2545 return res; 2546 return put_user(res, p); 2547 case SNDCTL_DSP_SETFMT: 2548 if (get_user(res, p)) 2549 return -EFAULT; 2550 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2551 if (res < 0) 2552 return res; 2553 return put_user(res, p); 2554 case SOUND_PCM_READ_BITS: 2555 res = snd_pcm_oss_get_format(pcm_oss_file); 2556 if (res < 0) 2557 return res; 2558 return put_user(res, p); 2559 case SNDCTL_DSP_CHANNELS: 2560 if (get_user(res, p)) 2561 return -EFAULT; 2562 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2563 if (res < 0) 2564 return res; 2565 return put_user(res, p); 2566 case SOUND_PCM_READ_CHANNELS: 2567 res = snd_pcm_oss_get_channels(pcm_oss_file); 2568 if (res < 0) 2569 return res; 2570 return put_user(res, p); 2571 case SOUND_PCM_WRITE_FILTER: 2572 case SOUND_PCM_READ_FILTER: 2573 return -EIO; 2574 case SNDCTL_DSP_POST: 2575 return snd_pcm_oss_post(pcm_oss_file); 2576 case SNDCTL_DSP_SUBDIVIDE: 2577 if (get_user(res, p)) 2578 return -EFAULT; 2579 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2580 if (res < 0) 2581 return res; 2582 return put_user(res, p); 2583 case SNDCTL_DSP_SETFRAGMENT: 2584 if (get_user(res, p)) 2585 return -EFAULT; 2586 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2587 case SNDCTL_DSP_GETFMTS: 2588 res = snd_pcm_oss_get_formats(pcm_oss_file); 2589 if (res < 0) 2590 return res; 2591 return put_user(res, p); 2592 case SNDCTL_DSP_GETOSPACE: 2593 case SNDCTL_DSP_GETISPACE: 2594 return snd_pcm_oss_get_space(pcm_oss_file, 2595 cmd == SNDCTL_DSP_GETISPACE ? 2596 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2597 (struct audio_buf_info __user *) arg); 2598 case SNDCTL_DSP_NONBLOCK: 2599 return snd_pcm_oss_nonblock(file); 2600 case SNDCTL_DSP_GETCAPS: 2601 res = snd_pcm_oss_get_caps(pcm_oss_file); 2602 if (res < 0) 2603 return res; 2604 return put_user(res, p); 2605 case SNDCTL_DSP_GETTRIGGER: 2606 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2607 if (res < 0) 2608 return res; 2609 return put_user(res, p); 2610 case SNDCTL_DSP_SETTRIGGER: 2611 if (get_user(res, p)) 2612 return -EFAULT; 2613 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2614 case SNDCTL_DSP_GETIPTR: 2615 case SNDCTL_DSP_GETOPTR: 2616 return snd_pcm_oss_get_ptr(pcm_oss_file, 2617 cmd == SNDCTL_DSP_GETIPTR ? 2618 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2619 (struct count_info __user *) arg); 2620 case SNDCTL_DSP_MAPINBUF: 2621 case SNDCTL_DSP_MAPOUTBUF: 2622 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2623 cmd == SNDCTL_DSP_MAPINBUF ? 2624 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2625 (struct buffmem_desc __user *) arg); 2626 case SNDCTL_DSP_SETSYNCRO: 2627 /* stop DMA now.. */ 2628 return 0; 2629 case SNDCTL_DSP_SETDUPLEX: 2630 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2631 return 0; 2632 return -EIO; 2633 case SNDCTL_DSP_GETODELAY: 2634 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2635 if (res < 0) { 2636 /* it's for sure, some broken apps don't check for error codes */ 2637 put_user(0, p); 2638 return res; 2639 } 2640 return put_user(res, p); 2641 case SNDCTL_DSP_PROFILE: 2642 return 0; /* silently ignore */ 2643 default: 2644 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2645 } 2646 return -EINVAL; 2647 } 2648 2649 #ifdef CONFIG_COMPAT 2650 /* all compatible */ 2651 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2652 #else 2653 #define snd_pcm_oss_ioctl_compat NULL 2654 #endif 2655 2656 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2657 { 2658 struct snd_pcm_oss_file *pcm_oss_file; 2659 struct snd_pcm_substream *substream; 2660 2661 pcm_oss_file = file->private_data; 2662 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2663 if (substream == NULL) 2664 return -ENXIO; 2665 substream->f_flags = file->f_flags & O_NONBLOCK; 2666 #ifndef OSS_DEBUG 2667 return snd_pcm_oss_read1(substream, buf, count); 2668 #else 2669 { 2670 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2671 pcm_dbg(substream->pcm, 2672 "pcm_oss: read %li bytes (returned %li bytes)\n", 2673 (long)count, (long)res); 2674 return res; 2675 } 2676 #endif 2677 } 2678 2679 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2680 { 2681 struct snd_pcm_oss_file *pcm_oss_file; 2682 struct snd_pcm_substream *substream; 2683 long result; 2684 2685 pcm_oss_file = file->private_data; 2686 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2687 if (substream == NULL) 2688 return -ENXIO; 2689 substream->f_flags = file->f_flags & O_NONBLOCK; 2690 result = snd_pcm_oss_write1(substream, buf, count); 2691 #ifdef OSS_DEBUG 2692 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2693 (long)count, (long)result); 2694 #endif 2695 return result; 2696 } 2697 2698 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2699 { 2700 struct snd_pcm_runtime *runtime = substream->runtime; 2701 if (atomic_read(&substream->mmap_count)) 2702 return runtime->oss.prev_hw_ptr_period != 2703 get_hw_ptr_period(runtime); 2704 else 2705 return snd_pcm_playback_avail(runtime) >= 2706 runtime->oss.period_frames; 2707 } 2708 2709 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2710 { 2711 struct snd_pcm_runtime *runtime = substream->runtime; 2712 if (atomic_read(&substream->mmap_count)) 2713 return runtime->oss.prev_hw_ptr_period != 2714 get_hw_ptr_period(runtime); 2715 else 2716 return snd_pcm_capture_avail(runtime) >= 2717 runtime->oss.period_frames; 2718 } 2719 2720 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2721 { 2722 struct snd_pcm_oss_file *pcm_oss_file; 2723 unsigned int mask; 2724 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2725 2726 pcm_oss_file = file->private_data; 2727 2728 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2729 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2730 2731 mask = 0; 2732 if (psubstream != NULL) { 2733 struct snd_pcm_runtime *runtime = psubstream->runtime; 2734 poll_wait(file, &runtime->sleep, wait); 2735 snd_pcm_stream_lock_irq(psubstream); 2736 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2737 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2738 snd_pcm_oss_playback_ready(psubstream))) 2739 mask |= POLLOUT | POLLWRNORM; 2740 snd_pcm_stream_unlock_irq(psubstream); 2741 } 2742 if (csubstream != NULL) { 2743 struct snd_pcm_runtime *runtime = csubstream->runtime; 2744 snd_pcm_state_t ostate; 2745 poll_wait(file, &runtime->sleep, wait); 2746 snd_pcm_stream_lock_irq(csubstream); 2747 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2748 snd_pcm_oss_capture_ready(csubstream)) 2749 mask |= POLLIN | POLLRDNORM; 2750 snd_pcm_stream_unlock_irq(csubstream); 2751 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2752 struct snd_pcm_oss_file ofile; 2753 memset(&ofile, 0, sizeof(ofile)); 2754 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2755 runtime->oss.trigger = 0; 2756 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2757 } 2758 } 2759 2760 return mask; 2761 } 2762 2763 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2764 { 2765 struct snd_pcm_oss_file *pcm_oss_file; 2766 struct snd_pcm_substream *substream = NULL; 2767 struct snd_pcm_runtime *runtime; 2768 int err; 2769 2770 #ifdef OSS_DEBUG 2771 pr_debug("pcm_oss: mmap begin\n"); 2772 #endif 2773 pcm_oss_file = file->private_data; 2774 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2775 case VM_READ | VM_WRITE: 2776 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2777 if (substream) 2778 break; 2779 /* Fall through */ 2780 case VM_READ: 2781 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2782 break; 2783 case VM_WRITE: 2784 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2785 break; 2786 default: 2787 return -EINVAL; 2788 } 2789 /* set VM_READ access as well to fix memset() routines that do 2790 reads before writes (to improve performance) */ 2791 area->vm_flags |= VM_READ; 2792 if (substream == NULL) 2793 return -ENXIO; 2794 runtime = substream->runtime; 2795 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2796 return -EIO; 2797 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2798 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2799 else 2800 return -EIO; 2801 2802 if (runtime->oss.params) { 2803 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2804 return err; 2805 } 2806 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2807 if (runtime->oss.plugin_first != NULL) 2808 return -EIO; 2809 #endif 2810 2811 if (area->vm_pgoff != 0) 2812 return -EINVAL; 2813 2814 err = snd_pcm_mmap_data(substream, file, area); 2815 if (err < 0) 2816 return err; 2817 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2818 runtime->silence_threshold = 0; 2819 runtime->silence_size = 0; 2820 #ifdef OSS_DEBUG 2821 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2822 runtime->oss.mmap_bytes); 2823 #endif 2824 /* In mmap mode we never stop */ 2825 runtime->stop_threshold = runtime->boundary; 2826 2827 return 0; 2828 } 2829 2830 #ifdef CONFIG_SND_VERBOSE_PROCFS 2831 /* 2832 * /proc interface 2833 */ 2834 2835 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2836 struct snd_info_buffer *buffer) 2837 { 2838 struct snd_pcm_str *pstr = entry->private_data; 2839 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2840 mutex_lock(&pstr->oss.setup_mutex); 2841 while (setup) { 2842 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2843 setup->task_name, 2844 setup->periods, 2845 setup->period_size, 2846 setup->disable ? " disable" : "", 2847 setup->direct ? " direct" : "", 2848 setup->block ? " block" : "", 2849 setup->nonblock ? " non-block" : "", 2850 setup->partialfrag ? " partial-frag" : "", 2851 setup->nosilence ? " no-silence" : ""); 2852 setup = setup->next; 2853 } 2854 mutex_unlock(&pstr->oss.setup_mutex); 2855 } 2856 2857 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2858 { 2859 struct snd_pcm_oss_setup *setup, *setupn; 2860 2861 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2862 setup; setup = setupn) { 2863 setupn = setup->next; 2864 kfree(setup->task_name); 2865 kfree(setup); 2866 } 2867 pstr->oss.setup_list = NULL; 2868 } 2869 2870 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2871 struct snd_info_buffer *buffer) 2872 { 2873 struct snd_pcm_str *pstr = entry->private_data; 2874 char line[128], str[32], task_name[32]; 2875 const char *ptr; 2876 int idx1; 2877 struct snd_pcm_oss_setup *setup, *setup1, template; 2878 2879 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2880 mutex_lock(&pstr->oss.setup_mutex); 2881 memset(&template, 0, sizeof(template)); 2882 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2883 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2884 snd_pcm_oss_proc_free_setup_list(pstr); 2885 mutex_unlock(&pstr->oss.setup_mutex); 2886 continue; 2887 } 2888 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2889 if (!strcmp(setup->task_name, task_name)) { 2890 template = *setup; 2891 break; 2892 } 2893 } 2894 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2895 template.periods = simple_strtoul(str, NULL, 10); 2896 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2897 template.period_size = simple_strtoul(str, NULL, 10); 2898 for (idx1 = 31; idx1 >= 0; idx1--) 2899 if (template.period_size & (1 << idx1)) 2900 break; 2901 for (idx1--; idx1 >= 0; idx1--) 2902 template.period_size &= ~(1 << idx1); 2903 do { 2904 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2905 if (!strcmp(str, "disable")) { 2906 template.disable = 1; 2907 } else if (!strcmp(str, "direct")) { 2908 template.direct = 1; 2909 } else if (!strcmp(str, "block")) { 2910 template.block = 1; 2911 } else if (!strcmp(str, "non-block")) { 2912 template.nonblock = 1; 2913 } else if (!strcmp(str, "partial-frag")) { 2914 template.partialfrag = 1; 2915 } else if (!strcmp(str, "no-silence")) { 2916 template.nosilence = 1; 2917 } else if (!strcmp(str, "buggy-ptr")) { 2918 template.buggyptr = 1; 2919 } 2920 } while (*str); 2921 if (setup == NULL) { 2922 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2923 if (! setup) { 2924 buffer->error = -ENOMEM; 2925 mutex_unlock(&pstr->oss.setup_mutex); 2926 return; 2927 } 2928 if (pstr->oss.setup_list == NULL) 2929 pstr->oss.setup_list = setup; 2930 else { 2931 for (setup1 = pstr->oss.setup_list; 2932 setup1->next; setup1 = setup1->next); 2933 setup1->next = setup; 2934 } 2935 template.task_name = kstrdup(task_name, GFP_KERNEL); 2936 if (! template.task_name) { 2937 kfree(setup); 2938 buffer->error = -ENOMEM; 2939 mutex_unlock(&pstr->oss.setup_mutex); 2940 return; 2941 } 2942 } 2943 *setup = template; 2944 mutex_unlock(&pstr->oss.setup_mutex); 2945 } 2946 } 2947 2948 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2949 { 2950 int stream; 2951 for (stream = 0; stream < 2; ++stream) { 2952 struct snd_info_entry *entry; 2953 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2954 if (pstr->substream_count == 0) 2955 continue; 2956 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2957 entry->content = SNDRV_INFO_CONTENT_TEXT; 2958 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2959 entry->c.text.read = snd_pcm_oss_proc_read; 2960 entry->c.text.write = snd_pcm_oss_proc_write; 2961 entry->private_data = pstr; 2962 if (snd_info_register(entry) < 0) { 2963 snd_info_free_entry(entry); 2964 entry = NULL; 2965 } 2966 } 2967 pstr->oss.proc_entry = entry; 2968 } 2969 } 2970 2971 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2972 { 2973 int stream; 2974 for (stream = 0; stream < 2; ++stream) { 2975 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2976 snd_info_free_entry(pstr->oss.proc_entry); 2977 pstr->oss.proc_entry = NULL; 2978 snd_pcm_oss_proc_free_setup_list(pstr); 2979 } 2980 } 2981 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2982 #define snd_pcm_oss_proc_init(pcm) 2983 #define snd_pcm_oss_proc_done(pcm) 2984 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2985 2986 /* 2987 * ENTRY functions 2988 */ 2989 2990 static const struct file_operations snd_pcm_oss_f_reg = 2991 { 2992 .owner = THIS_MODULE, 2993 .read = snd_pcm_oss_read, 2994 .write = snd_pcm_oss_write, 2995 .open = snd_pcm_oss_open, 2996 .release = snd_pcm_oss_release, 2997 .llseek = no_llseek, 2998 .poll = snd_pcm_oss_poll, 2999 .unlocked_ioctl = snd_pcm_oss_ioctl, 3000 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3001 .mmap = snd_pcm_oss_mmap, 3002 }; 3003 3004 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3005 { 3006 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3007 pcm->card, index, &snd_pcm_oss_f_reg, 3008 pcm) < 0) { 3009 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3010 pcm->card->number, pcm->device); 3011 } 3012 } 3013 3014 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3015 { 3016 pcm->oss.reg = 0; 3017 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3018 char name[128]; 3019 int duplex; 3020 register_oss_dsp(pcm, 0); 3021 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3022 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3023 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3024 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3025 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3026 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3027 pcm->card->number, 3028 name); 3029 #endif 3030 pcm->oss.reg++; 3031 pcm->oss.reg_mask |= 1; 3032 } 3033 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3034 register_oss_dsp(pcm, 1); 3035 pcm->oss.reg++; 3036 pcm->oss.reg_mask |= 2; 3037 } 3038 3039 if (pcm->oss.reg) 3040 snd_pcm_oss_proc_init(pcm); 3041 3042 return 0; 3043 } 3044 3045 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3046 { 3047 if (pcm->oss.reg) { 3048 if (pcm->oss.reg_mask & 1) { 3049 pcm->oss.reg_mask &= ~1; 3050 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3051 pcm->card, 0); 3052 } 3053 if (pcm->oss.reg_mask & 2) { 3054 pcm->oss.reg_mask &= ~2; 3055 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3056 pcm->card, 1); 3057 } 3058 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3059 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3060 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3061 #endif 3062 } 3063 pcm->oss.reg = 0; 3064 } 3065 return 0; 3066 } 3067 3068 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3069 { 3070 snd_pcm_oss_disconnect_minor(pcm); 3071 snd_pcm_oss_proc_done(pcm); 3072 return 0; 3073 } 3074 3075 static struct snd_pcm_notify snd_pcm_oss_notify = 3076 { 3077 .n_register = snd_pcm_oss_register_minor, 3078 .n_disconnect = snd_pcm_oss_disconnect_minor, 3079 .n_unregister = snd_pcm_oss_unregister_minor, 3080 }; 3081 3082 static int __init alsa_pcm_oss_init(void) 3083 { 3084 int i; 3085 int err; 3086 3087 /* check device map table */ 3088 for (i = 0; i < SNDRV_CARDS; i++) { 3089 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3090 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3091 i, dsp_map[i]); 3092 dsp_map[i] = 0; 3093 } 3094 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3095 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3096 i, adsp_map[i]); 3097 adsp_map[i] = 1; 3098 } 3099 } 3100 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3101 return err; 3102 return 0; 3103 } 3104 3105 static void __exit alsa_pcm_oss_exit(void) 3106 { 3107 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3108 } 3109 3110 module_init(alsa_pcm_oss_init) 3111 module_exit(alsa_pcm_oss_exit) 3112