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 = 1 << ld2(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 = 1 << (ld2(min_period_size - 1) + 1); 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 = 1 << ld2(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 snd_printd("No memory\n"); 858 err = -ENOMEM; 859 goto failure; 860 } 861 862 if (atomic_read(&substream->mmap_count)) 863 direct = 1; 864 else 865 direct = substream->oss.setup.direct; 866 867 _snd_pcm_hw_params_any(sparams); 868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 870 snd_mask_none(&mask); 871 if (atomic_read(&substream->mmap_count)) 872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 873 else { 874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 875 if (!direct) 876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 877 } 878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 879 if (err < 0) { 880 snd_printd("No usable accesses\n"); 881 err = -EINVAL; 882 goto failure; 883 } 884 choose_rate(substream, sparams, runtime->oss.rate); 885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 886 887 format = snd_pcm_oss_format_from(runtime->oss.format); 888 889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 890 if (direct) 891 sformat = format; 892 else 893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 894 895 if ((__force int)sformat < 0 || 896 !snd_mask_test(&sformat_mask, (__force int)sformat)) { 897 for (sformat = (__force snd_pcm_format_t)0; 898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 900 if (snd_mask_test(&sformat_mask, (__force int)sformat) && 901 snd_pcm_oss_format_to(sformat) >= 0) 902 break; 903 } 904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 905 snd_printd("Cannot find a format!!!\n"); 906 err = -EINVAL; 907 goto failure; 908 } 909 } 910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 911 if (err < 0) 912 goto failure; 913 914 if (direct) { 915 memcpy(params, sparams, sizeof(*params)); 916 } else { 917 _snd_pcm_hw_params_any(params); 918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 923 runtime->oss.channels, 0); 924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 925 runtime->oss.rate, 0); 926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 927 params_access(params), params_format(params), 928 params_channels(params), params_rate(params)); 929 } 930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 931 params_access(sparams), params_format(sparams), 932 params_channels(sparams), params_rate(sparams)); 933 934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 935 params_channels(params) / 8; 936 937 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 938 snd_pcm_oss_plugin_clear(substream); 939 if (!direct) { 940 /* add necessary plugins */ 941 snd_pcm_oss_plugin_clear(substream); 942 if ((err = snd_pcm_plug_format_plugins(substream, 943 params, 944 sparams)) < 0) { 945 snd_printd("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 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 953 snd_pcm_oss_plugin_clear(substream); 954 goto failure; 955 } 956 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 957 err = snd_pcm_plugin_append(plugin); 958 } else { 959 err = snd_pcm_plugin_insert(plugin); 960 } 961 if (err < 0) { 962 snd_pcm_oss_plugin_clear(substream); 963 goto failure; 964 } 965 } 966 } 967 #endif 968 969 err = snd_pcm_oss_period_size(substream, params, sparams); 970 if (err < 0) 971 goto failure; 972 973 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 974 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 975 if (err < 0) 976 goto failure; 977 978 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 979 runtime->oss.periods, NULL); 980 if (err < 0) 981 goto failure; 982 983 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 984 985 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 986 snd_printd("HW_PARAMS failed: %i\n", err); 987 goto failure; 988 } 989 990 memset(sw_params, 0, sizeof(*sw_params)); 991 if (runtime->oss.trigger) { 992 sw_params->start_threshold = 1; 993 } else { 994 sw_params->start_threshold = runtime->boundary; 995 } 996 if (atomic_read(&substream->mmap_count) || 997 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 998 sw_params->stop_threshold = runtime->boundary; 999 else 1000 sw_params->stop_threshold = runtime->buffer_size; 1001 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1002 sw_params->period_step = 1; 1003 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1004 1 : runtime->period_size; 1005 if (atomic_read(&substream->mmap_count) || 1006 substream->oss.setup.nosilence) { 1007 sw_params->silence_threshold = 0; 1008 sw_params->silence_size = 0; 1009 } else { 1010 snd_pcm_uframes_t frames; 1011 frames = runtime->period_size + 16; 1012 if (frames > runtime->buffer_size) 1013 frames = runtime->buffer_size; 1014 sw_params->silence_threshold = frames; 1015 sw_params->silence_size = frames; 1016 } 1017 1018 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1019 snd_printd("SW_PARAMS failed: %i\n", err); 1020 goto failure; 1021 } 1022 1023 runtime->oss.periods = params_periods(sparams); 1024 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1025 if (oss_period_size < 0) { 1026 err = -EINVAL; 1027 goto failure; 1028 } 1029 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1030 if (runtime->oss.plugin_first) { 1031 err = snd_pcm_plug_alloc(substream, oss_period_size); 1032 if (err < 0) 1033 goto failure; 1034 } 1035 #endif 1036 oss_period_size *= oss_frame_size; 1037 1038 oss_buffer_size = oss_period_size * runtime->oss.periods; 1039 if (oss_buffer_size < 0) { 1040 err = -EINVAL; 1041 goto failure; 1042 } 1043 1044 runtime->oss.period_bytes = oss_period_size; 1045 runtime->oss.buffer_bytes = oss_buffer_size; 1046 1047 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1048 runtime->oss.period_bytes, 1049 runtime->oss.buffer_bytes); 1050 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1051 params_period_size(sparams), 1052 params_buffer_size(sparams)); 1053 1054 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1055 runtime->oss.channels = params_channels(params); 1056 runtime->oss.rate = params_rate(params); 1057 1058 vfree(runtime->oss.buffer); 1059 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1060 if (!runtime->oss.buffer) { 1061 err = -ENOMEM; 1062 goto failure; 1063 } 1064 1065 runtime->oss.params = 0; 1066 runtime->oss.prepare = 1; 1067 runtime->oss.buffer_used = 0; 1068 if (runtime->dma_area) 1069 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1070 1071 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1072 1073 err = 0; 1074 failure: 1075 kfree(sw_params); 1076 kfree(params); 1077 kfree(sparams); 1078 mutex_unlock(&runtime->oss.params_lock); 1079 return err; 1080 } 1081 1082 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1083 { 1084 int idx, err; 1085 struct snd_pcm_substream *asubstream = NULL, *substream; 1086 1087 for (idx = 0; idx < 2; idx++) { 1088 substream = pcm_oss_file->streams[idx]; 1089 if (substream == NULL) 1090 continue; 1091 if (asubstream == NULL) 1092 asubstream = substream; 1093 if (substream->runtime->oss.params) { 1094 err = snd_pcm_oss_change_params(substream); 1095 if (err < 0) 1096 return err; 1097 } 1098 } 1099 if (!asubstream) 1100 return -EIO; 1101 if (r_substream) 1102 *r_substream = asubstream; 1103 return 0; 1104 } 1105 1106 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1107 { 1108 int err; 1109 struct snd_pcm_runtime *runtime = substream->runtime; 1110 1111 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1112 if (err < 0) { 1113 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1114 return err; 1115 } 1116 runtime->oss.prepare = 0; 1117 runtime->oss.prev_hw_ptr_period = 0; 1118 runtime->oss.period_ptr = 0; 1119 runtime->oss.buffer_used = 0; 1120 1121 return 0; 1122 } 1123 1124 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1125 { 1126 struct snd_pcm_runtime *runtime; 1127 int err; 1128 1129 if (substream == NULL) 1130 return 0; 1131 runtime = substream->runtime; 1132 if (runtime->oss.params) { 1133 err = snd_pcm_oss_change_params(substream); 1134 if (err < 0) 1135 return err; 1136 } 1137 if (runtime->oss.prepare) { 1138 err = snd_pcm_oss_prepare(substream); 1139 if (err < 0) 1140 return err; 1141 } 1142 return 0; 1143 } 1144 1145 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1146 { 1147 struct snd_pcm_runtime *runtime; 1148 snd_pcm_uframes_t frames; 1149 int err = 0; 1150 1151 while (1) { 1152 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1153 if (err < 0) 1154 break; 1155 runtime = substream->runtime; 1156 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1157 break; 1158 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1159 /* until avail(delay) <= buffer_size */ 1160 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1161 frames /= runtime->period_size; 1162 frames *= runtime->period_size; 1163 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1164 if (err < 0) 1165 break; 1166 } 1167 return err; 1168 } 1169 1170 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1171 { 1172 struct snd_pcm_runtime *runtime = substream->runtime; 1173 int ret; 1174 while (1) { 1175 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1176 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1177 #ifdef OSS_DEBUG 1178 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1179 printk(KERN_DEBUG "pcm_oss: write: " 1180 "recovering from XRUN\n"); 1181 else 1182 printk(KERN_DEBUG "pcm_oss: write: " 1183 "recovering from SUSPEND\n"); 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 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1217 printk(KERN_DEBUG "pcm_oss: read: " 1218 "recovering from XRUN\n"); 1219 else 1220 printk(KERN_DEBUG "pcm_oss: read: " 1221 "recovering from SUSPEND\n"); 1222 #endif 1223 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1224 if (ret < 0) 1225 break; 1226 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1227 ret = snd_pcm_oss_prepare(substream); 1228 if (ret < 0) 1229 break; 1230 } 1231 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1232 if (ret < 0) 1233 break; 1234 if (in_kernel) { 1235 mm_segment_t fs; 1236 fs = snd_enter_user(); 1237 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1238 snd_leave_user(fs); 1239 } else { 1240 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1241 } 1242 if (ret == -EPIPE) { 1243 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1244 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1245 if (ret < 0) 1246 break; 1247 } 1248 continue; 1249 } 1250 if (ret != -ESTRPIPE) 1251 break; 1252 } 1253 return ret; 1254 } 1255 1256 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1257 { 1258 struct snd_pcm_runtime *runtime = substream->runtime; 1259 int ret; 1260 while (1) { 1261 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1262 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1263 #ifdef OSS_DEBUG 1264 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1265 printk(KERN_DEBUG "pcm_oss: writev: " 1266 "recovering from XRUN\n"); 1267 else 1268 printk(KERN_DEBUG "pcm_oss: writev: " 1269 "recovering from SUSPEND\n"); 1270 #endif 1271 ret = snd_pcm_oss_prepare(substream); 1272 if (ret < 0) 1273 break; 1274 } 1275 if (in_kernel) { 1276 mm_segment_t fs; 1277 fs = snd_enter_user(); 1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1279 snd_leave_user(fs); 1280 } else { 1281 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1282 } 1283 if (ret != -EPIPE && ret != -ESTRPIPE) 1284 break; 1285 1286 /* test, if we can't store new data, because the stream */ 1287 /* has not been started */ 1288 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1289 return -EAGAIN; 1290 } 1291 return ret; 1292 } 1293 1294 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1295 { 1296 struct snd_pcm_runtime *runtime = substream->runtime; 1297 int ret; 1298 while (1) { 1299 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1300 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1301 #ifdef OSS_DEBUG 1302 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1303 printk(KERN_DEBUG "pcm_oss: readv: " 1304 "recovering from XRUN\n"); 1305 else 1306 printk(KERN_DEBUG "pcm_oss: readv: " 1307 "recovering from SUSPEND\n"); 1308 #endif 1309 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1310 if (ret < 0) 1311 break; 1312 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1313 ret = snd_pcm_oss_prepare(substream); 1314 if (ret < 0) 1315 break; 1316 } 1317 if (in_kernel) { 1318 mm_segment_t fs; 1319 fs = snd_enter_user(); 1320 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1321 snd_leave_user(fs); 1322 } else { 1323 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1324 } 1325 if (ret != -EPIPE && ret != -ESTRPIPE) 1326 break; 1327 } 1328 return ret; 1329 } 1330 1331 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1332 { 1333 struct snd_pcm_runtime *runtime = substream->runtime; 1334 snd_pcm_sframes_t frames, frames1; 1335 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1336 if (runtime->oss.plugin_first) { 1337 struct snd_pcm_plugin_channel *channels; 1338 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1339 if (!in_kernel) { 1340 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1341 return -EFAULT; 1342 buf = runtime->oss.buffer; 1343 } 1344 frames = bytes / oss_frame_bytes; 1345 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1346 if (frames1 < 0) 1347 return frames1; 1348 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1349 if (frames1 <= 0) 1350 return frames1; 1351 bytes = frames1 * oss_frame_bytes; 1352 } else 1353 #endif 1354 { 1355 frames = bytes_to_frames(runtime, bytes); 1356 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1357 if (frames1 <= 0) 1358 return frames1; 1359 bytes = frames_to_bytes(runtime, frames1); 1360 } 1361 return bytes; 1362 } 1363 1364 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1365 { 1366 size_t xfer = 0; 1367 ssize_t tmp; 1368 struct snd_pcm_runtime *runtime = substream->runtime; 1369 1370 if (atomic_read(&substream->mmap_count)) 1371 return -ENXIO; 1372 1373 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1374 return tmp; 1375 mutex_lock(&runtime->oss.params_lock); 1376 while (bytes > 0) { 1377 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1378 tmp = bytes; 1379 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1380 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1381 if (tmp > 0) { 1382 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1383 tmp = -EFAULT; 1384 goto err; 1385 } 1386 } 1387 runtime->oss.buffer_used += tmp; 1388 buf += tmp; 1389 bytes -= tmp; 1390 xfer += tmp; 1391 if (substream->oss.setup.partialfrag || 1392 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1393 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1394 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1395 if (tmp <= 0) 1396 goto err; 1397 runtime->oss.bytes += tmp; 1398 runtime->oss.period_ptr += tmp; 1399 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1400 if (runtime->oss.period_ptr == 0 || 1401 runtime->oss.period_ptr == runtime->oss.buffer_used) 1402 runtime->oss.buffer_used = 0; 1403 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1404 tmp = -EAGAIN; 1405 goto err; 1406 } 1407 } 1408 } else { 1409 tmp = snd_pcm_oss_write2(substream, 1410 (const char __force *)buf, 1411 runtime->oss.period_bytes, 0); 1412 if (tmp <= 0) 1413 goto err; 1414 runtime->oss.bytes += tmp; 1415 buf += tmp; 1416 bytes -= tmp; 1417 xfer += tmp; 1418 if ((substream->f_flags & O_NONBLOCK) != 0 && 1419 tmp != runtime->oss.period_bytes) 1420 break; 1421 } 1422 } 1423 mutex_unlock(&runtime->oss.params_lock); 1424 return xfer; 1425 1426 err: 1427 mutex_unlock(&runtime->oss.params_lock); 1428 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1429 } 1430 1431 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1432 { 1433 struct snd_pcm_runtime *runtime = substream->runtime; 1434 snd_pcm_sframes_t frames, frames1; 1435 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1436 char __user *final_dst = (char __force __user *)buf; 1437 if (runtime->oss.plugin_first) { 1438 struct snd_pcm_plugin_channel *channels; 1439 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1440 if (!in_kernel) 1441 buf = runtime->oss.buffer; 1442 frames = bytes / oss_frame_bytes; 1443 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1444 if (frames1 < 0) 1445 return frames1; 1446 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1447 if (frames1 <= 0) 1448 return frames1; 1449 bytes = frames1 * oss_frame_bytes; 1450 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1451 return -EFAULT; 1452 } else 1453 #endif 1454 { 1455 frames = bytes_to_frames(runtime, bytes); 1456 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1457 if (frames1 <= 0) 1458 return frames1; 1459 bytes = frames_to_bytes(runtime, frames1); 1460 } 1461 return bytes; 1462 } 1463 1464 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1465 { 1466 size_t xfer = 0; 1467 ssize_t tmp; 1468 struct snd_pcm_runtime *runtime = substream->runtime; 1469 1470 if (atomic_read(&substream->mmap_count)) 1471 return -ENXIO; 1472 1473 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1474 return tmp; 1475 mutex_lock(&runtime->oss.params_lock); 1476 while (bytes > 0) { 1477 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1478 if (runtime->oss.buffer_used == 0) { 1479 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1480 if (tmp <= 0) 1481 goto err; 1482 runtime->oss.bytes += tmp; 1483 runtime->oss.period_ptr = tmp; 1484 runtime->oss.buffer_used = tmp; 1485 } 1486 tmp = bytes; 1487 if ((size_t) tmp > runtime->oss.buffer_used) 1488 tmp = runtime->oss.buffer_used; 1489 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1490 tmp = -EFAULT; 1491 goto err; 1492 } 1493 buf += tmp; 1494 bytes -= tmp; 1495 xfer += tmp; 1496 runtime->oss.buffer_used -= tmp; 1497 } else { 1498 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1499 runtime->oss.period_bytes, 0); 1500 if (tmp <= 0) 1501 goto err; 1502 runtime->oss.bytes += tmp; 1503 buf += tmp; 1504 bytes -= tmp; 1505 xfer += tmp; 1506 } 1507 } 1508 mutex_unlock(&runtime->oss.params_lock); 1509 return xfer; 1510 1511 err: 1512 mutex_unlock(&runtime->oss.params_lock); 1513 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1514 } 1515 1516 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1517 { 1518 struct snd_pcm_substream *substream; 1519 struct snd_pcm_runtime *runtime; 1520 int i; 1521 1522 for (i = 0; i < 2; i++) { 1523 substream = pcm_oss_file->streams[i]; 1524 if (!substream) 1525 continue; 1526 runtime = substream->runtime; 1527 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1528 runtime->oss.prepare = 1; 1529 runtime->oss.buffer_used = 0; 1530 runtime->oss.prev_hw_ptr_period = 0; 1531 runtime->oss.period_ptr = 0; 1532 } 1533 return 0; 1534 } 1535 1536 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1537 { 1538 struct snd_pcm_substream *substream; 1539 int err; 1540 1541 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1542 if (substream != NULL) { 1543 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1544 return err; 1545 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1546 } 1547 /* note: all errors from the start action are ignored */ 1548 /* OSS apps do not know, how to handle them */ 1549 return 0; 1550 } 1551 1552 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1553 { 1554 struct snd_pcm_runtime *runtime; 1555 ssize_t result = 0; 1556 snd_pcm_state_t state; 1557 long res; 1558 wait_queue_t wait; 1559 1560 runtime = substream->runtime; 1561 init_waitqueue_entry(&wait, current); 1562 add_wait_queue(&runtime->sleep, &wait); 1563 #ifdef OSS_DEBUG 1564 printk(KERN_DEBUG "sync1: size = %li\n", size); 1565 #endif 1566 while (1) { 1567 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1568 if (result > 0) { 1569 runtime->oss.buffer_used = 0; 1570 result = 0; 1571 break; 1572 } 1573 if (result != 0 && result != -EAGAIN) 1574 break; 1575 result = 0; 1576 set_current_state(TASK_INTERRUPTIBLE); 1577 snd_pcm_stream_lock_irq(substream); 1578 state = runtime->status->state; 1579 snd_pcm_stream_unlock_irq(substream); 1580 if (state != SNDRV_PCM_STATE_RUNNING) { 1581 set_current_state(TASK_RUNNING); 1582 break; 1583 } 1584 res = schedule_timeout(10 * HZ); 1585 if (signal_pending(current)) { 1586 result = -ERESTARTSYS; 1587 break; 1588 } 1589 if (res == 0) { 1590 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1591 result = -EIO; 1592 break; 1593 } 1594 } 1595 remove_wait_queue(&runtime->sleep, &wait); 1596 return result; 1597 } 1598 1599 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1600 { 1601 int err = 0; 1602 unsigned int saved_f_flags; 1603 struct snd_pcm_substream *substream; 1604 struct snd_pcm_runtime *runtime; 1605 snd_pcm_format_t format; 1606 unsigned long width; 1607 size_t size; 1608 1609 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1610 if (substream != NULL) { 1611 runtime = substream->runtime; 1612 if (atomic_read(&substream->mmap_count)) 1613 goto __direct; 1614 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1615 return err; 1616 format = snd_pcm_oss_format_from(runtime->oss.format); 1617 width = snd_pcm_format_physical_width(format); 1618 mutex_lock(&runtime->oss.params_lock); 1619 if (runtime->oss.buffer_used > 0) { 1620 #ifdef OSS_DEBUG 1621 printk(KERN_DEBUG "sync: buffer_used\n"); 1622 #endif 1623 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1624 snd_pcm_format_set_silence(format, 1625 runtime->oss.buffer + runtime->oss.buffer_used, 1626 size); 1627 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1628 if (err < 0) { 1629 mutex_unlock(&runtime->oss.params_lock); 1630 return err; 1631 } 1632 } else if (runtime->oss.period_ptr > 0) { 1633 #ifdef OSS_DEBUG 1634 printk(KERN_DEBUG "sync: period_ptr\n"); 1635 #endif 1636 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1637 snd_pcm_format_set_silence(format, 1638 runtime->oss.buffer, 1639 size * 8 / width); 1640 err = snd_pcm_oss_sync1(substream, size); 1641 if (err < 0) { 1642 mutex_unlock(&runtime->oss.params_lock); 1643 return err; 1644 } 1645 } 1646 /* 1647 * The ALSA's period might be a bit large than OSS one. 1648 * Fill the remain portion of ALSA period with zeros. 1649 */ 1650 size = runtime->control->appl_ptr % runtime->period_size; 1651 if (size > 0) { 1652 size = runtime->period_size - size; 1653 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1654 size = (runtime->frame_bits * size) / 8; 1655 while (size > 0) { 1656 mm_segment_t fs; 1657 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1658 size -= size1; 1659 size1 *= 8; 1660 size1 /= runtime->sample_bits; 1661 snd_pcm_format_set_silence(runtime->format, 1662 runtime->oss.buffer, 1663 size1); 1664 size1 /= runtime->channels; /* frames */ 1665 fs = snd_enter_user(); 1666 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1); 1667 snd_leave_user(fs); 1668 } 1669 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1670 void __user *buffers[runtime->channels]; 1671 memset(buffers, 0, runtime->channels * sizeof(void *)); 1672 snd_pcm_lib_writev(substream, buffers, size); 1673 } 1674 } 1675 mutex_unlock(&runtime->oss.params_lock); 1676 /* 1677 * finish sync: drain the buffer 1678 */ 1679 __direct: 1680 saved_f_flags = substream->f_flags; 1681 substream->f_flags &= ~O_NONBLOCK; 1682 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1683 substream->f_flags = saved_f_flags; 1684 if (err < 0) 1685 return err; 1686 runtime->oss.prepare = 1; 1687 } 1688 1689 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1690 if (substream != NULL) { 1691 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1692 return err; 1693 runtime = substream->runtime; 1694 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1695 if (err < 0) 1696 return err; 1697 runtime->oss.buffer_used = 0; 1698 runtime->oss.prepare = 1; 1699 } 1700 return 0; 1701 } 1702 1703 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1704 { 1705 int idx; 1706 1707 for (idx = 1; idx >= 0; --idx) { 1708 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1709 struct snd_pcm_runtime *runtime; 1710 if (substream == NULL) 1711 continue; 1712 runtime = substream->runtime; 1713 if (rate < 1000) 1714 rate = 1000; 1715 else if (rate > 192000) 1716 rate = 192000; 1717 if (runtime->oss.rate != rate) { 1718 runtime->oss.params = 1; 1719 runtime->oss.rate = rate; 1720 } 1721 } 1722 return snd_pcm_oss_get_rate(pcm_oss_file); 1723 } 1724 1725 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1726 { 1727 struct snd_pcm_substream *substream; 1728 int err; 1729 1730 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1731 return err; 1732 return substream->runtime->oss.rate; 1733 } 1734 1735 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1736 { 1737 int idx; 1738 if (channels < 1) 1739 channels = 1; 1740 if (channels > 128) 1741 return -EINVAL; 1742 for (idx = 1; idx >= 0; --idx) { 1743 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1744 struct snd_pcm_runtime *runtime; 1745 if (substream == NULL) 1746 continue; 1747 runtime = substream->runtime; 1748 if (runtime->oss.channels != channels) { 1749 runtime->oss.params = 1; 1750 runtime->oss.channels = channels; 1751 } 1752 } 1753 return snd_pcm_oss_get_channels(pcm_oss_file); 1754 } 1755 1756 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1757 { 1758 struct snd_pcm_substream *substream; 1759 int err; 1760 1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1762 return err; 1763 return substream->runtime->oss.channels; 1764 } 1765 1766 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1767 { 1768 struct snd_pcm_substream *substream; 1769 int err; 1770 1771 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1772 return err; 1773 return substream->runtime->oss.period_bytes; 1774 } 1775 1776 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1777 { 1778 struct snd_pcm_substream *substream; 1779 int err; 1780 int direct; 1781 struct snd_pcm_hw_params *params; 1782 unsigned int formats = 0; 1783 struct snd_mask format_mask; 1784 int fmt; 1785 1786 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1787 return err; 1788 if (atomic_read(&substream->mmap_count)) 1789 direct = 1; 1790 else 1791 direct = substream->oss.setup.direct; 1792 if (!direct) 1793 return AFMT_MU_LAW | AFMT_U8 | 1794 AFMT_S16_LE | AFMT_S16_BE | 1795 AFMT_S8 | AFMT_U16_LE | 1796 AFMT_U16_BE | 1797 AFMT_S32_LE | AFMT_S32_BE | 1798 AFMT_S24_LE | AFMT_S24_BE | 1799 AFMT_S24_PACKED; 1800 params = kmalloc(sizeof(*params), GFP_KERNEL); 1801 if (!params) 1802 return -ENOMEM; 1803 _snd_pcm_hw_params_any(params); 1804 err = snd_pcm_hw_refine(substream, params); 1805 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1806 kfree(params); 1807 if (err < 0) 1808 return err; 1809 for (fmt = 0; fmt < 32; ++fmt) { 1810 if (snd_mask_test(&format_mask, fmt)) { 1811 int f = snd_pcm_oss_format_to(fmt); 1812 if (f >= 0) 1813 formats |= f; 1814 } 1815 } 1816 return formats; 1817 } 1818 1819 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1820 { 1821 int formats, idx; 1822 1823 if (format != AFMT_QUERY) { 1824 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1825 if (formats < 0) 1826 return formats; 1827 if (!(formats & format)) 1828 format = AFMT_U8; 1829 for (idx = 1; idx >= 0; --idx) { 1830 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1831 struct snd_pcm_runtime *runtime; 1832 if (substream == NULL) 1833 continue; 1834 runtime = substream->runtime; 1835 if (runtime->oss.format != format) { 1836 runtime->oss.params = 1; 1837 runtime->oss.format = format; 1838 } 1839 } 1840 } 1841 return snd_pcm_oss_get_format(pcm_oss_file); 1842 } 1843 1844 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1845 { 1846 struct snd_pcm_substream *substream; 1847 int err; 1848 1849 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1850 return err; 1851 return substream->runtime->oss.format; 1852 } 1853 1854 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1855 { 1856 struct snd_pcm_runtime *runtime; 1857 1858 if (substream == NULL) 1859 return 0; 1860 runtime = substream->runtime; 1861 if (subdivide == 0) { 1862 subdivide = runtime->oss.subdivision; 1863 if (subdivide == 0) 1864 subdivide = 1; 1865 return subdivide; 1866 } 1867 if (runtime->oss.subdivision || runtime->oss.fragshift) 1868 return -EINVAL; 1869 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1870 subdivide != 8 && subdivide != 16) 1871 return -EINVAL; 1872 runtime->oss.subdivision = subdivide; 1873 runtime->oss.params = 1; 1874 return subdivide; 1875 } 1876 1877 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1878 { 1879 int err = -EINVAL, idx; 1880 1881 for (idx = 1; idx >= 0; --idx) { 1882 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1883 if (substream == NULL) 1884 continue; 1885 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1886 return err; 1887 } 1888 return err; 1889 } 1890 1891 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1892 { 1893 struct snd_pcm_runtime *runtime; 1894 1895 if (substream == NULL) 1896 return 0; 1897 runtime = substream->runtime; 1898 if (runtime->oss.subdivision || runtime->oss.fragshift) 1899 return -EINVAL; 1900 runtime->oss.fragshift = val & 0xffff; 1901 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1902 if (runtime->oss.fragshift < 4) /* < 16 */ 1903 runtime->oss.fragshift = 4; 1904 if (runtime->oss.maxfrags < 2) 1905 runtime->oss.maxfrags = 2; 1906 runtime->oss.params = 1; 1907 return 0; 1908 } 1909 1910 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1911 { 1912 int err = -EINVAL, idx; 1913 1914 for (idx = 1; idx >= 0; --idx) { 1915 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1916 if (substream == NULL) 1917 continue; 1918 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1919 return err; 1920 } 1921 return err; 1922 } 1923 1924 static int snd_pcm_oss_nonblock(struct file * file) 1925 { 1926 spin_lock(&file->f_lock); 1927 file->f_flags |= O_NONBLOCK; 1928 spin_unlock(&file->f_lock); 1929 return 0; 1930 } 1931 1932 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1933 { 1934 1935 if (substream == NULL) { 1936 res &= ~DSP_CAP_DUPLEX; 1937 return res; 1938 } 1939 #ifdef DSP_CAP_MULTI 1940 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1941 if (substream->pstr->substream_count > 1) 1942 res |= DSP_CAP_MULTI; 1943 #endif 1944 /* DSP_CAP_REALTIME is set all times: */ 1945 /* all ALSA drivers can return actual pointer in ring buffer */ 1946 #if defined(DSP_CAP_REALTIME) && 0 1947 { 1948 struct snd_pcm_runtime *runtime = substream->runtime; 1949 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1950 res &= ~DSP_CAP_REALTIME; 1951 } 1952 #endif 1953 return res; 1954 } 1955 1956 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1957 { 1958 int result, idx; 1959 1960 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1961 for (idx = 0; idx < 2; idx++) { 1962 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1963 result = snd_pcm_oss_get_caps1(substream, result); 1964 } 1965 result |= 0x0001; /* revision - same as SB AWE 64 */ 1966 return result; 1967 } 1968 1969 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 1970 snd_pcm_uframes_t hw_ptr) 1971 { 1972 struct snd_pcm_runtime *runtime = substream->runtime; 1973 snd_pcm_uframes_t appl_ptr; 1974 appl_ptr = hw_ptr + runtime->buffer_size; 1975 appl_ptr %= runtime->boundary; 1976 runtime->control->appl_ptr = appl_ptr; 1977 } 1978 1979 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1980 { 1981 struct snd_pcm_runtime *runtime; 1982 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1983 int err, cmd; 1984 1985 #ifdef OSS_DEBUG 1986 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger); 1987 #endif 1988 1989 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1990 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1991 1992 if (psubstream) { 1993 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1994 return err; 1995 } 1996 if (csubstream) { 1997 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1998 return err; 1999 } 2000 if (psubstream) { 2001 runtime = psubstream->runtime; 2002 if (trigger & PCM_ENABLE_OUTPUT) { 2003 if (runtime->oss.trigger) 2004 goto _skip1; 2005 if (atomic_read(&psubstream->mmap_count)) 2006 snd_pcm_oss_simulate_fill(psubstream, 2007 get_hw_ptr_period(runtime)); 2008 runtime->oss.trigger = 1; 2009 runtime->start_threshold = 1; 2010 cmd = SNDRV_PCM_IOCTL_START; 2011 } else { 2012 if (!runtime->oss.trigger) 2013 goto _skip1; 2014 runtime->oss.trigger = 0; 2015 runtime->start_threshold = runtime->boundary; 2016 cmd = SNDRV_PCM_IOCTL_DROP; 2017 runtime->oss.prepare = 1; 2018 } 2019 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2020 if (err < 0) 2021 return err; 2022 } 2023 _skip1: 2024 if (csubstream) { 2025 runtime = csubstream->runtime; 2026 if (trigger & PCM_ENABLE_INPUT) { 2027 if (runtime->oss.trigger) 2028 goto _skip2; 2029 runtime->oss.trigger = 1; 2030 runtime->start_threshold = 1; 2031 cmd = SNDRV_PCM_IOCTL_START; 2032 } else { 2033 if (!runtime->oss.trigger) 2034 goto _skip2; 2035 runtime->oss.trigger = 0; 2036 runtime->start_threshold = runtime->boundary; 2037 cmd = SNDRV_PCM_IOCTL_DROP; 2038 runtime->oss.prepare = 1; 2039 } 2040 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2041 if (err < 0) 2042 return err; 2043 } 2044 _skip2: 2045 return 0; 2046 } 2047 2048 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2049 { 2050 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2051 int result = 0; 2052 2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2055 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2056 result |= PCM_ENABLE_OUTPUT; 2057 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2058 result |= PCM_ENABLE_INPUT; 2059 return result; 2060 } 2061 2062 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2063 { 2064 struct snd_pcm_substream *substream; 2065 struct snd_pcm_runtime *runtime; 2066 snd_pcm_sframes_t delay; 2067 int err; 2068 2069 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2070 if (substream == NULL) 2071 return -EINVAL; 2072 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2073 return err; 2074 runtime = substream->runtime; 2075 if (runtime->oss.params || runtime->oss.prepare) 2076 return 0; 2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2078 if (err == -EPIPE) 2079 delay = 0; /* hack for broken OSS applications */ 2080 else if (err < 0) 2081 return err; 2082 return snd_pcm_oss_bytes(substream, delay); 2083 } 2084 2085 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2086 { 2087 struct snd_pcm_substream *substream; 2088 struct snd_pcm_runtime *runtime; 2089 snd_pcm_sframes_t delay; 2090 int fixup; 2091 struct count_info info; 2092 int err; 2093 2094 if (_info == NULL) 2095 return -EFAULT; 2096 substream = pcm_oss_file->streams[stream]; 2097 if (substream == NULL) 2098 return -EINVAL; 2099 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2100 return err; 2101 runtime = substream->runtime; 2102 if (runtime->oss.params || runtime->oss.prepare) { 2103 memset(&info, 0, sizeof(info)); 2104 if (copy_to_user(_info, &info, sizeof(info))) 2105 return -EFAULT; 2106 return 0; 2107 } 2108 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2110 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2111 err = 0; 2112 delay = 0; 2113 fixup = 0; 2114 } else { 2115 fixup = runtime->oss.buffer_used; 2116 } 2117 } else { 2118 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2119 fixup = -runtime->oss.buffer_used; 2120 } 2121 if (err < 0) 2122 return err; 2123 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2124 if (atomic_read(&substream->mmap_count)) { 2125 snd_pcm_sframes_t n; 2126 delay = get_hw_ptr_period(runtime); 2127 n = delay - runtime->oss.prev_hw_ptr_period; 2128 if (n < 0) 2129 n += runtime->boundary; 2130 info.blocks = n / runtime->period_size; 2131 runtime->oss.prev_hw_ptr_period = delay; 2132 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2133 snd_pcm_oss_simulate_fill(substream, delay); 2134 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2135 } else { 2136 delay = snd_pcm_oss_bytes(substream, delay); 2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2138 if (substream->oss.setup.buggyptr) 2139 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2140 else 2141 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2142 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2143 } else { 2144 delay += fixup; 2145 info.blocks = delay / runtime->oss.period_bytes; 2146 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2147 } 2148 } 2149 if (copy_to_user(_info, &info, sizeof(info))) 2150 return -EFAULT; 2151 return 0; 2152 } 2153 2154 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2155 { 2156 struct snd_pcm_substream *substream; 2157 struct snd_pcm_runtime *runtime; 2158 snd_pcm_sframes_t avail; 2159 int fixup; 2160 struct audio_buf_info info; 2161 int err; 2162 2163 if (_info == NULL) 2164 return -EFAULT; 2165 substream = pcm_oss_file->streams[stream]; 2166 if (substream == NULL) 2167 return -EINVAL; 2168 runtime = substream->runtime; 2169 2170 if (runtime->oss.params && 2171 (err = snd_pcm_oss_change_params(substream)) < 0) 2172 return err; 2173 2174 info.fragsize = runtime->oss.period_bytes; 2175 info.fragstotal = runtime->periods; 2176 if (runtime->oss.prepare) { 2177 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2178 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2179 info.fragments = runtime->oss.periods; 2180 } else { 2181 info.bytes = 0; 2182 info.fragments = 0; 2183 } 2184 } else { 2185 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2187 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2188 avail = runtime->buffer_size; 2189 err = 0; 2190 fixup = 0; 2191 } else { 2192 avail = runtime->buffer_size - avail; 2193 fixup = -runtime->oss.buffer_used; 2194 } 2195 } else { 2196 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2197 fixup = runtime->oss.buffer_used; 2198 } 2199 if (err < 0) 2200 return err; 2201 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2202 info.fragments = info.bytes / runtime->oss.period_bytes; 2203 } 2204 2205 #ifdef OSS_DEBUG 2206 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, " 2207 "fragstotal = %i, fragsize = %i\n", 2208 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2209 #endif 2210 if (copy_to_user(_info, &info, sizeof(info))) 2211 return -EFAULT; 2212 return 0; 2213 } 2214 2215 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2216 { 2217 // it won't be probably implemented 2218 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 2219 return -EINVAL; 2220 } 2221 2222 static const char *strip_task_path(const char *path) 2223 { 2224 const char *ptr, *ptrl = NULL; 2225 for (ptr = path; *ptr; ptr++) { 2226 if (*ptr == '/') 2227 ptrl = ptr + 1; 2228 } 2229 return ptrl; 2230 } 2231 2232 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2233 const char *task_name, 2234 struct snd_pcm_oss_setup *rsetup) 2235 { 2236 struct snd_pcm_oss_setup *setup; 2237 2238 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2239 do { 2240 for (setup = pcm->streams[stream].oss.setup_list; setup; 2241 setup = setup->next) { 2242 if (!strcmp(setup->task_name, task_name)) 2243 goto out; 2244 } 2245 } while ((task_name = strip_task_path(task_name)) != NULL); 2246 out: 2247 if (setup) 2248 *rsetup = *setup; 2249 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2250 } 2251 2252 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2253 { 2254 struct snd_pcm_runtime *runtime; 2255 runtime = substream->runtime; 2256 vfree(runtime->oss.buffer); 2257 runtime->oss.buffer = NULL; 2258 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2259 snd_pcm_oss_plugin_clear(substream); 2260 #endif 2261 substream->oss.oss = 0; 2262 } 2263 2264 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2265 struct snd_pcm_oss_setup *setup, 2266 int minor) 2267 { 2268 struct snd_pcm_runtime *runtime; 2269 2270 substream->oss.oss = 1; 2271 substream->oss.setup = *setup; 2272 if (setup->nonblock) 2273 substream->f_flags |= O_NONBLOCK; 2274 else if (setup->block) 2275 substream->f_flags &= ~O_NONBLOCK; 2276 runtime = substream->runtime; 2277 runtime->oss.params = 1; 2278 runtime->oss.trigger = 1; 2279 runtime->oss.rate = 8000; 2280 mutex_init(&runtime->oss.params_lock); 2281 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2282 case SNDRV_MINOR_OSS_PCM_8: 2283 runtime->oss.format = AFMT_U8; 2284 break; 2285 case SNDRV_MINOR_OSS_PCM_16: 2286 runtime->oss.format = AFMT_S16_LE; 2287 break; 2288 default: 2289 runtime->oss.format = AFMT_MU_LAW; 2290 } 2291 runtime->oss.channels = 1; 2292 runtime->oss.fragshift = 0; 2293 runtime->oss.maxfrags = 0; 2294 runtime->oss.subdivision = 0; 2295 substream->pcm_release = snd_pcm_oss_release_substream; 2296 } 2297 2298 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2299 { 2300 int cidx; 2301 if (!pcm_oss_file) 2302 return 0; 2303 for (cidx = 0; cidx < 2; ++cidx) { 2304 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2305 if (substream) 2306 snd_pcm_release_substream(substream); 2307 } 2308 kfree(pcm_oss_file); 2309 return 0; 2310 } 2311 2312 static int snd_pcm_oss_open_file(struct file *file, 2313 struct snd_pcm *pcm, 2314 struct snd_pcm_oss_file **rpcm_oss_file, 2315 int minor, 2316 struct snd_pcm_oss_setup *setup) 2317 { 2318 int idx, err; 2319 struct snd_pcm_oss_file *pcm_oss_file; 2320 struct snd_pcm_substream *substream; 2321 fmode_t f_mode = file->f_mode; 2322 2323 if (rpcm_oss_file) 2324 *rpcm_oss_file = NULL; 2325 2326 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2327 if (pcm_oss_file == NULL) 2328 return -ENOMEM; 2329 2330 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2331 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2332 f_mode = FMODE_WRITE; 2333 2334 file->f_flags &= ~O_APPEND; 2335 for (idx = 0; idx < 2; idx++) { 2336 if (setup[idx].disable) 2337 continue; 2338 if (! pcm->streams[idx].substream_count) 2339 continue; /* no matching substream */ 2340 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2341 if (! (f_mode & FMODE_WRITE)) 2342 continue; 2343 } else { 2344 if (! (f_mode & FMODE_READ)) 2345 continue; 2346 } 2347 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2348 if (err < 0) { 2349 snd_pcm_oss_release_file(pcm_oss_file); 2350 return err; 2351 } 2352 2353 pcm_oss_file->streams[idx] = substream; 2354 substream->file = pcm_oss_file; 2355 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2356 } 2357 2358 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2359 snd_pcm_oss_release_file(pcm_oss_file); 2360 return -EINVAL; 2361 } 2362 2363 file->private_data = pcm_oss_file; 2364 if (rpcm_oss_file) 2365 *rpcm_oss_file = pcm_oss_file; 2366 return 0; 2367 } 2368 2369 2370 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2371 { 2372 unsigned int idx; 2373 2374 if (snd_BUG_ON(!task || !name || size < 2)) 2375 return -EINVAL; 2376 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2377 name[idx] = task->comm[idx]; 2378 name[idx] = '\0'; 2379 return 0; 2380 } 2381 2382 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2383 { 2384 int err; 2385 char task_name[32]; 2386 struct snd_pcm *pcm; 2387 struct snd_pcm_oss_file *pcm_oss_file; 2388 struct snd_pcm_oss_setup setup[2]; 2389 int nonblock; 2390 wait_queue_t wait; 2391 2392 err = nonseekable_open(inode, file); 2393 if (err < 0) 2394 return err; 2395 2396 pcm = snd_lookup_oss_minor_data(iminor(inode), 2397 SNDRV_OSS_DEVICE_TYPE_PCM); 2398 if (pcm == NULL) { 2399 err = -ENODEV; 2400 goto __error1; 2401 } 2402 err = snd_card_file_add(pcm->card, file); 2403 if (err < 0) 2404 goto __error1; 2405 if (!try_module_get(pcm->card->module)) { 2406 err = -EFAULT; 2407 goto __error2; 2408 } 2409 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2410 err = -EFAULT; 2411 goto __error; 2412 } 2413 memset(setup, 0, sizeof(setup)); 2414 if (file->f_mode & FMODE_WRITE) 2415 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2416 task_name, &setup[0]); 2417 if (file->f_mode & FMODE_READ) 2418 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2419 task_name, &setup[1]); 2420 2421 nonblock = !!(file->f_flags & O_NONBLOCK); 2422 if (!nonblock) 2423 nonblock = nonblock_open; 2424 2425 init_waitqueue_entry(&wait, current); 2426 add_wait_queue(&pcm->open_wait, &wait); 2427 mutex_lock(&pcm->open_mutex); 2428 while (1) { 2429 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2430 iminor(inode), setup); 2431 if (err >= 0) 2432 break; 2433 if (err == -EAGAIN) { 2434 if (nonblock) { 2435 err = -EBUSY; 2436 break; 2437 } 2438 } else 2439 break; 2440 set_current_state(TASK_INTERRUPTIBLE); 2441 mutex_unlock(&pcm->open_mutex); 2442 schedule(); 2443 mutex_lock(&pcm->open_mutex); 2444 if (signal_pending(current)) { 2445 err = -ERESTARTSYS; 2446 break; 2447 } 2448 } 2449 remove_wait_queue(&pcm->open_wait, &wait); 2450 mutex_unlock(&pcm->open_mutex); 2451 if (err < 0) 2452 goto __error; 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 return err; 2461 } 2462 2463 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2464 { 2465 struct snd_pcm *pcm; 2466 struct snd_pcm_substream *substream; 2467 struct snd_pcm_oss_file *pcm_oss_file; 2468 2469 pcm_oss_file = file->private_data; 2470 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2471 if (substream == NULL) 2472 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2473 if (snd_BUG_ON(!substream)) 2474 return -ENXIO; 2475 pcm = substream->pcm; 2476 if (!pcm->card->shutdown) 2477 snd_pcm_oss_sync(pcm_oss_file); 2478 mutex_lock(&pcm->open_mutex); 2479 snd_pcm_oss_release_file(pcm_oss_file); 2480 mutex_unlock(&pcm->open_mutex); 2481 wake_up(&pcm->open_wait); 2482 module_put(pcm->card->module); 2483 snd_card_file_remove(pcm->card, file); 2484 return 0; 2485 } 2486 2487 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2488 { 2489 struct snd_pcm_oss_file *pcm_oss_file; 2490 int __user *p = (int __user *)arg; 2491 int res; 2492 2493 pcm_oss_file = file->private_data; 2494 if (cmd == OSS_GETVERSION) 2495 return put_user(SNDRV_OSS_VERSION, p); 2496 if (cmd == OSS_ALSAEMULVER) 2497 return put_user(1, p); 2498 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2499 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2500 struct snd_pcm_substream *substream; 2501 int idx; 2502 for (idx = 0; idx < 2; ++idx) { 2503 substream = pcm_oss_file->streams[idx]; 2504 if (substream != NULL) 2505 break; 2506 } 2507 if (snd_BUG_ON(idx >= 2)) 2508 return -ENXIO; 2509 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2510 } 2511 #endif 2512 if (((cmd >> 8) & 0xff) != 'P') 2513 return -EINVAL; 2514 #ifdef OSS_DEBUG 2515 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd); 2516 #endif 2517 switch (cmd) { 2518 case SNDCTL_DSP_RESET: 2519 return snd_pcm_oss_reset(pcm_oss_file); 2520 case SNDCTL_DSP_SYNC: 2521 return snd_pcm_oss_sync(pcm_oss_file); 2522 case SNDCTL_DSP_SPEED: 2523 if (get_user(res, p)) 2524 return -EFAULT; 2525 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2526 return res; 2527 return put_user(res, p); 2528 case SOUND_PCM_READ_RATE: 2529 res = snd_pcm_oss_get_rate(pcm_oss_file); 2530 if (res < 0) 2531 return res; 2532 return put_user(res, p); 2533 case SNDCTL_DSP_STEREO: 2534 if (get_user(res, p)) 2535 return -EFAULT; 2536 res = res > 0 ? 2 : 1; 2537 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2538 return res; 2539 return put_user(--res, p); 2540 case SNDCTL_DSP_GETBLKSIZE: 2541 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2542 if (res < 0) 2543 return res; 2544 return put_user(res, p); 2545 case SNDCTL_DSP_SETFMT: 2546 if (get_user(res, p)) 2547 return -EFAULT; 2548 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2549 if (res < 0) 2550 return res; 2551 return put_user(res, p); 2552 case SOUND_PCM_READ_BITS: 2553 res = snd_pcm_oss_get_format(pcm_oss_file); 2554 if (res < 0) 2555 return res; 2556 return put_user(res, p); 2557 case SNDCTL_DSP_CHANNELS: 2558 if (get_user(res, p)) 2559 return -EFAULT; 2560 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2561 if (res < 0) 2562 return res; 2563 return put_user(res, p); 2564 case SOUND_PCM_READ_CHANNELS: 2565 res = snd_pcm_oss_get_channels(pcm_oss_file); 2566 if (res < 0) 2567 return res; 2568 return put_user(res, p); 2569 case SOUND_PCM_WRITE_FILTER: 2570 case SOUND_PCM_READ_FILTER: 2571 return -EIO; 2572 case SNDCTL_DSP_POST: 2573 return snd_pcm_oss_post(pcm_oss_file); 2574 case SNDCTL_DSP_SUBDIVIDE: 2575 if (get_user(res, p)) 2576 return -EFAULT; 2577 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2578 if (res < 0) 2579 return res; 2580 return put_user(res, p); 2581 case SNDCTL_DSP_SETFRAGMENT: 2582 if (get_user(res, p)) 2583 return -EFAULT; 2584 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2585 case SNDCTL_DSP_GETFMTS: 2586 res = snd_pcm_oss_get_formats(pcm_oss_file); 2587 if (res < 0) 2588 return res; 2589 return put_user(res, p); 2590 case SNDCTL_DSP_GETOSPACE: 2591 case SNDCTL_DSP_GETISPACE: 2592 return snd_pcm_oss_get_space(pcm_oss_file, 2593 cmd == SNDCTL_DSP_GETISPACE ? 2594 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2595 (struct audio_buf_info __user *) arg); 2596 case SNDCTL_DSP_NONBLOCK: 2597 return snd_pcm_oss_nonblock(file); 2598 case SNDCTL_DSP_GETCAPS: 2599 res = snd_pcm_oss_get_caps(pcm_oss_file); 2600 if (res < 0) 2601 return res; 2602 return put_user(res, p); 2603 case SNDCTL_DSP_GETTRIGGER: 2604 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2605 if (res < 0) 2606 return res; 2607 return put_user(res, p); 2608 case SNDCTL_DSP_SETTRIGGER: 2609 if (get_user(res, p)) 2610 return -EFAULT; 2611 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2612 case SNDCTL_DSP_GETIPTR: 2613 case SNDCTL_DSP_GETOPTR: 2614 return snd_pcm_oss_get_ptr(pcm_oss_file, 2615 cmd == SNDCTL_DSP_GETIPTR ? 2616 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2617 (struct count_info __user *) arg); 2618 case SNDCTL_DSP_MAPINBUF: 2619 case SNDCTL_DSP_MAPOUTBUF: 2620 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2621 cmd == SNDCTL_DSP_MAPINBUF ? 2622 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2623 (struct buffmem_desc __user *) arg); 2624 case SNDCTL_DSP_SETSYNCRO: 2625 /* stop DMA now.. */ 2626 return 0; 2627 case SNDCTL_DSP_SETDUPLEX: 2628 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2629 return 0; 2630 return -EIO; 2631 case SNDCTL_DSP_GETODELAY: 2632 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2633 if (res < 0) { 2634 /* it's for sure, some broken apps don't check for error codes */ 2635 put_user(0, p); 2636 return res; 2637 } 2638 return put_user(res, p); 2639 case SNDCTL_DSP_PROFILE: 2640 return 0; /* silently ignore */ 2641 default: 2642 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2643 } 2644 return -EINVAL; 2645 } 2646 2647 #ifdef CONFIG_COMPAT 2648 /* all compatible */ 2649 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2650 #else 2651 #define snd_pcm_oss_ioctl_compat NULL 2652 #endif 2653 2654 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2655 { 2656 struct snd_pcm_oss_file *pcm_oss_file; 2657 struct snd_pcm_substream *substream; 2658 2659 pcm_oss_file = file->private_data; 2660 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2661 if (substream == NULL) 2662 return -ENXIO; 2663 substream->f_flags = file->f_flags & O_NONBLOCK; 2664 #ifndef OSS_DEBUG 2665 return snd_pcm_oss_read1(substream, buf, count); 2666 #else 2667 { 2668 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2669 printk(KERN_DEBUG "pcm_oss: read %li bytes " 2670 "(returned %li bytes)\n", (long)count, (long)res); 2671 return res; 2672 } 2673 #endif 2674 } 2675 2676 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2677 { 2678 struct snd_pcm_oss_file *pcm_oss_file; 2679 struct snd_pcm_substream *substream; 2680 long result; 2681 2682 pcm_oss_file = file->private_data; 2683 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2684 if (substream == NULL) 2685 return -ENXIO; 2686 substream->f_flags = file->f_flags & O_NONBLOCK; 2687 result = snd_pcm_oss_write1(substream, buf, count); 2688 #ifdef OSS_DEBUG 2689 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n", 2690 (long)count, (long)result); 2691 #endif 2692 return result; 2693 } 2694 2695 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2696 { 2697 struct snd_pcm_runtime *runtime = substream->runtime; 2698 if (atomic_read(&substream->mmap_count)) 2699 return runtime->oss.prev_hw_ptr_period != 2700 get_hw_ptr_period(runtime); 2701 else 2702 return snd_pcm_playback_avail(runtime) >= 2703 runtime->oss.period_frames; 2704 } 2705 2706 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2707 { 2708 struct snd_pcm_runtime *runtime = substream->runtime; 2709 if (atomic_read(&substream->mmap_count)) 2710 return runtime->oss.prev_hw_ptr_period != 2711 get_hw_ptr_period(runtime); 2712 else 2713 return snd_pcm_capture_avail(runtime) >= 2714 runtime->oss.period_frames; 2715 } 2716 2717 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2718 { 2719 struct snd_pcm_oss_file *pcm_oss_file; 2720 unsigned int mask; 2721 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2722 2723 pcm_oss_file = file->private_data; 2724 2725 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2726 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2727 2728 mask = 0; 2729 if (psubstream != NULL) { 2730 struct snd_pcm_runtime *runtime = psubstream->runtime; 2731 poll_wait(file, &runtime->sleep, wait); 2732 snd_pcm_stream_lock_irq(psubstream); 2733 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2734 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2735 snd_pcm_oss_playback_ready(psubstream))) 2736 mask |= POLLOUT | POLLWRNORM; 2737 snd_pcm_stream_unlock_irq(psubstream); 2738 } 2739 if (csubstream != NULL) { 2740 struct snd_pcm_runtime *runtime = csubstream->runtime; 2741 snd_pcm_state_t ostate; 2742 poll_wait(file, &runtime->sleep, wait); 2743 snd_pcm_stream_lock_irq(csubstream); 2744 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2745 snd_pcm_oss_capture_ready(csubstream)) 2746 mask |= POLLIN | POLLRDNORM; 2747 snd_pcm_stream_unlock_irq(csubstream); 2748 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2749 struct snd_pcm_oss_file ofile; 2750 memset(&ofile, 0, sizeof(ofile)); 2751 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2752 runtime->oss.trigger = 0; 2753 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2754 } 2755 } 2756 2757 return mask; 2758 } 2759 2760 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2761 { 2762 struct snd_pcm_oss_file *pcm_oss_file; 2763 struct snd_pcm_substream *substream = NULL; 2764 struct snd_pcm_runtime *runtime; 2765 int err; 2766 2767 #ifdef OSS_DEBUG 2768 printk(KERN_DEBUG "pcm_oss: mmap begin\n"); 2769 #endif 2770 pcm_oss_file = file->private_data; 2771 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2772 case VM_READ | VM_WRITE: 2773 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2774 if (substream) 2775 break; 2776 /* Fall through */ 2777 case VM_READ: 2778 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2779 break; 2780 case VM_WRITE: 2781 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2782 break; 2783 default: 2784 return -EINVAL; 2785 } 2786 /* set VM_READ access as well to fix memset() routines that do 2787 reads before writes (to improve performance) */ 2788 area->vm_flags |= VM_READ; 2789 if (substream == NULL) 2790 return -ENXIO; 2791 runtime = substream->runtime; 2792 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2793 return -EIO; 2794 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2795 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2796 else 2797 return -EIO; 2798 2799 if (runtime->oss.params) { 2800 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2801 return err; 2802 } 2803 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2804 if (runtime->oss.plugin_first != NULL) 2805 return -EIO; 2806 #endif 2807 2808 if (area->vm_pgoff != 0) 2809 return -EINVAL; 2810 2811 err = snd_pcm_mmap_data(substream, file, area); 2812 if (err < 0) 2813 return err; 2814 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2815 runtime->silence_threshold = 0; 2816 runtime->silence_size = 0; 2817 #ifdef OSS_DEBUG 2818 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n", 2819 runtime->oss.mmap_bytes); 2820 #endif 2821 /* In mmap mode we never stop */ 2822 runtime->stop_threshold = runtime->boundary; 2823 2824 return 0; 2825 } 2826 2827 #ifdef CONFIG_SND_VERBOSE_PROCFS 2828 /* 2829 * /proc interface 2830 */ 2831 2832 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2833 struct snd_info_buffer *buffer) 2834 { 2835 struct snd_pcm_str *pstr = entry->private_data; 2836 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2837 mutex_lock(&pstr->oss.setup_mutex); 2838 while (setup) { 2839 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2840 setup->task_name, 2841 setup->periods, 2842 setup->period_size, 2843 setup->disable ? " disable" : "", 2844 setup->direct ? " direct" : "", 2845 setup->block ? " block" : "", 2846 setup->nonblock ? " non-block" : "", 2847 setup->partialfrag ? " partial-frag" : "", 2848 setup->nosilence ? " no-silence" : ""); 2849 setup = setup->next; 2850 } 2851 mutex_unlock(&pstr->oss.setup_mutex); 2852 } 2853 2854 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2855 { 2856 struct snd_pcm_oss_setup *setup, *setupn; 2857 2858 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2859 setup; setup = setupn) { 2860 setupn = setup->next; 2861 kfree(setup->task_name); 2862 kfree(setup); 2863 } 2864 pstr->oss.setup_list = NULL; 2865 } 2866 2867 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2868 struct snd_info_buffer *buffer) 2869 { 2870 struct snd_pcm_str *pstr = entry->private_data; 2871 char line[128], str[32], task_name[32]; 2872 const char *ptr; 2873 int idx1; 2874 struct snd_pcm_oss_setup *setup, *setup1, template; 2875 2876 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2877 mutex_lock(&pstr->oss.setup_mutex); 2878 memset(&template, 0, sizeof(template)); 2879 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2880 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2881 snd_pcm_oss_proc_free_setup_list(pstr); 2882 mutex_unlock(&pstr->oss.setup_mutex); 2883 continue; 2884 } 2885 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2886 if (!strcmp(setup->task_name, task_name)) { 2887 template = *setup; 2888 break; 2889 } 2890 } 2891 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2892 template.periods = simple_strtoul(str, NULL, 10); 2893 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2894 template.period_size = simple_strtoul(str, NULL, 10); 2895 for (idx1 = 31; idx1 >= 0; idx1--) 2896 if (template.period_size & (1 << idx1)) 2897 break; 2898 for (idx1--; idx1 >= 0; idx1--) 2899 template.period_size &= ~(1 << idx1); 2900 do { 2901 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2902 if (!strcmp(str, "disable")) { 2903 template.disable = 1; 2904 } else if (!strcmp(str, "direct")) { 2905 template.direct = 1; 2906 } else if (!strcmp(str, "block")) { 2907 template.block = 1; 2908 } else if (!strcmp(str, "non-block")) { 2909 template.nonblock = 1; 2910 } else if (!strcmp(str, "partial-frag")) { 2911 template.partialfrag = 1; 2912 } else if (!strcmp(str, "no-silence")) { 2913 template.nosilence = 1; 2914 } else if (!strcmp(str, "buggy-ptr")) { 2915 template.buggyptr = 1; 2916 } 2917 } while (*str); 2918 if (setup == NULL) { 2919 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2920 if (! setup) { 2921 buffer->error = -ENOMEM; 2922 mutex_unlock(&pstr->oss.setup_mutex); 2923 return; 2924 } 2925 if (pstr->oss.setup_list == NULL) 2926 pstr->oss.setup_list = setup; 2927 else { 2928 for (setup1 = pstr->oss.setup_list; 2929 setup1->next; setup1 = setup1->next); 2930 setup1->next = setup; 2931 } 2932 template.task_name = kstrdup(task_name, GFP_KERNEL); 2933 if (! template.task_name) { 2934 kfree(setup); 2935 buffer->error = -ENOMEM; 2936 mutex_unlock(&pstr->oss.setup_mutex); 2937 return; 2938 } 2939 } 2940 *setup = template; 2941 mutex_unlock(&pstr->oss.setup_mutex); 2942 } 2943 } 2944 2945 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2946 { 2947 int stream; 2948 for (stream = 0; stream < 2; ++stream) { 2949 struct snd_info_entry *entry; 2950 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2951 if (pstr->substream_count == 0) 2952 continue; 2953 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2954 entry->content = SNDRV_INFO_CONTENT_TEXT; 2955 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2956 entry->c.text.read = snd_pcm_oss_proc_read; 2957 entry->c.text.write = snd_pcm_oss_proc_write; 2958 entry->private_data = pstr; 2959 if (snd_info_register(entry) < 0) { 2960 snd_info_free_entry(entry); 2961 entry = NULL; 2962 } 2963 } 2964 pstr->oss.proc_entry = entry; 2965 } 2966 } 2967 2968 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2969 { 2970 int stream; 2971 for (stream = 0; stream < 2; ++stream) { 2972 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2973 snd_info_free_entry(pstr->oss.proc_entry); 2974 pstr->oss.proc_entry = NULL; 2975 snd_pcm_oss_proc_free_setup_list(pstr); 2976 } 2977 } 2978 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2979 #define snd_pcm_oss_proc_init(pcm) 2980 #define snd_pcm_oss_proc_done(pcm) 2981 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2982 2983 /* 2984 * ENTRY functions 2985 */ 2986 2987 static const struct file_operations snd_pcm_oss_f_reg = 2988 { 2989 .owner = THIS_MODULE, 2990 .read = snd_pcm_oss_read, 2991 .write = snd_pcm_oss_write, 2992 .open = snd_pcm_oss_open, 2993 .release = snd_pcm_oss_release, 2994 .llseek = no_llseek, 2995 .poll = snd_pcm_oss_poll, 2996 .unlocked_ioctl = snd_pcm_oss_ioctl, 2997 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2998 .mmap = snd_pcm_oss_mmap, 2999 }; 3000 3001 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3002 { 3003 char name[128]; 3004 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 3005 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3006 pcm->card, index, &snd_pcm_oss_f_reg, 3007 pcm, name) < 0) { 3008 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 3009 pcm->card->number, pcm->device); 3010 } 3011 } 3012 3013 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3014 { 3015 pcm->oss.reg = 0; 3016 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3017 char name[128]; 3018 int duplex; 3019 register_oss_dsp(pcm, 0); 3020 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3021 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3022 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3023 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3024 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3025 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3026 pcm->card->number, 3027 name); 3028 #endif 3029 pcm->oss.reg++; 3030 pcm->oss.reg_mask |= 1; 3031 } 3032 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3033 register_oss_dsp(pcm, 1); 3034 pcm->oss.reg++; 3035 pcm->oss.reg_mask |= 2; 3036 } 3037 3038 if (pcm->oss.reg) 3039 snd_pcm_oss_proc_init(pcm); 3040 3041 return 0; 3042 } 3043 3044 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3045 { 3046 if (pcm->oss.reg) { 3047 if (pcm->oss.reg_mask & 1) { 3048 pcm->oss.reg_mask &= ~1; 3049 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3050 pcm->card, 0); 3051 } 3052 if (pcm->oss.reg_mask & 2) { 3053 pcm->oss.reg_mask &= ~2; 3054 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3055 pcm->card, 1); 3056 } 3057 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3058 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3059 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3060 #endif 3061 } 3062 pcm->oss.reg = 0; 3063 } 3064 return 0; 3065 } 3066 3067 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3068 { 3069 snd_pcm_oss_disconnect_minor(pcm); 3070 snd_pcm_oss_proc_done(pcm); 3071 return 0; 3072 } 3073 3074 static struct snd_pcm_notify snd_pcm_oss_notify = 3075 { 3076 .n_register = snd_pcm_oss_register_minor, 3077 .n_disconnect = snd_pcm_oss_disconnect_minor, 3078 .n_unregister = snd_pcm_oss_unregister_minor, 3079 }; 3080 3081 static int __init alsa_pcm_oss_init(void) 3082 { 3083 int i; 3084 int err; 3085 3086 /* check device map table */ 3087 for (i = 0; i < SNDRV_CARDS; i++) { 3088 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3089 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 3090 i, dsp_map[i]); 3091 dsp_map[i] = 0; 3092 } 3093 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3094 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 3095 i, adsp_map[i]); 3096 adsp_map[i] = 1; 3097 } 3098 } 3099 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3100 return err; 3101 return 0; 3102 } 3103 3104 static void __exit alsa_pcm_oss_exit(void) 3105 { 3106 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3107 } 3108 3109 module_init(alsa_pcm_oss_init) 3110 module_exit(alsa_pcm_oss_exit) 3111