1 /* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #if 0 23 #define PLUGIN_DEBUG 24 #endif 25 #if 0 26 #define OSS_DEBUG 27 #endif 28 29 #include <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/time.h> 32 #include <linux/vmalloc.h> 33 #include <linux/moduleparam.h> 34 #include <linux/string.h> 35 #include <sound/core.h> 36 #include <sound/minors.h> 37 #include <sound/pcm.h> 38 #include <sound/pcm_params.h> 39 #include "pcm_plugin.h" 40 #include <sound/info.h> 41 #include <linux/soundcard.h> 42 #include <sound/initval.h> 43 44 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 45 46 static int dsp_map[SNDRV_CARDS]; 47 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 48 static int nonblock_open = 1; 49 50 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 51 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 52 MODULE_LICENSE("GPL"); 53 module_param_array(dsp_map, int, NULL, 0444); 54 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 55 module_param_array(adsp_map, int, NULL, 0444); 56 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 57 module_param(nonblock_open, bool, 0644); 58 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 59 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 61 62 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg); 63 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 64 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 65 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 66 67 static inline mm_segment_t snd_enter_user(void) 68 { 69 mm_segment_t fs = get_fs(); 70 set_fs(get_ds()); 71 return fs; 72 } 73 74 static inline void snd_leave_user(mm_segment_t fs) 75 { 76 set_fs(fs); 77 } 78 79 /* 80 * helper functions to process hw_params 81 */ 82 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 83 { 84 int changed = 0; 85 if (i->min < min) { 86 i->min = min; 87 i->openmin = openmin; 88 changed = 1; 89 } else if (i->min == min && !i->openmin && openmin) { 90 i->openmin = 1; 91 changed = 1; 92 } 93 if (i->integer) { 94 if (i->openmin) { 95 i->min++; 96 i->openmin = 0; 97 } 98 } 99 if (snd_interval_checkempty(i)) { 100 snd_interval_none(i); 101 return -EINVAL; 102 } 103 return changed; 104 } 105 106 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 107 { 108 int changed = 0; 109 if (i->max > max) { 110 i->max = max; 111 i->openmax = openmax; 112 changed = 1; 113 } else if (i->max == max && !i->openmax && openmax) { 114 i->openmax = 1; 115 changed = 1; 116 } 117 if (i->integer) { 118 if (i->openmax) { 119 i->max--; 120 i->openmax = 0; 121 } 122 } 123 if (snd_interval_checkempty(i)) { 124 snd_interval_none(i); 125 return -EINVAL; 126 } 127 return changed; 128 } 129 130 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 131 { 132 struct snd_interval t; 133 t.empty = 0; 134 t.min = t.max = val; 135 t.openmin = t.openmax = 0; 136 t.integer = 1; 137 return snd_interval_refine(i, &t); 138 } 139 140 /** 141 * snd_pcm_hw_param_value_min 142 * @params: the hw_params instance 143 * @var: parameter to retrieve 144 * @dir: pointer to the direction (-1,0,1) or NULL 145 * 146 * Return the minimum value for field PAR. 147 */ 148 static unsigned int 149 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 150 snd_pcm_hw_param_t var, int *dir) 151 { 152 if (hw_is_mask(var)) { 153 if (dir) 154 *dir = 0; 155 return snd_mask_min(hw_param_mask_c(params, var)); 156 } 157 if (hw_is_interval(var)) { 158 const struct snd_interval *i = hw_param_interval_c(params, var); 159 if (dir) 160 *dir = i->openmin; 161 return snd_interval_min(i); 162 } 163 return -EINVAL; 164 } 165 166 /** 167 * snd_pcm_hw_param_value_max 168 * @params: the hw_params instance 169 * @var: parameter to retrieve 170 * @dir: pointer to the direction (-1,0,1) or NULL 171 * 172 * Return the maximum value for field PAR. 173 */ 174 static unsigned int 175 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 176 snd_pcm_hw_param_t var, int *dir) 177 { 178 if (hw_is_mask(var)) { 179 if (dir) 180 *dir = 0; 181 return snd_mask_max(hw_param_mask_c(params, var)); 182 } 183 if (hw_is_interval(var)) { 184 const struct snd_interval *i = hw_param_interval_c(params, var); 185 if (dir) 186 *dir = - (int) i->openmax; 187 return snd_interval_max(i); 188 } 189 return -EINVAL; 190 } 191 192 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 193 snd_pcm_hw_param_t var, 194 const struct snd_mask *val) 195 { 196 int changed; 197 changed = snd_mask_refine(hw_param_mask(params, var), val); 198 if (changed) { 199 params->cmask |= 1 << var; 200 params->rmask |= 1 << var; 201 } 202 return changed; 203 } 204 205 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 206 struct snd_pcm_hw_params *params, 207 snd_pcm_hw_param_t var, 208 const struct snd_mask *val) 209 { 210 int changed = _snd_pcm_hw_param_mask(params, var, val); 211 if (changed < 0) 212 return changed; 213 if (params->rmask) { 214 int err = snd_pcm_hw_refine(pcm, params); 215 if (err < 0) 216 return err; 217 } 218 return 0; 219 } 220 221 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 222 snd_pcm_hw_param_t var, unsigned int val, 223 int dir) 224 { 225 int changed; 226 int open = 0; 227 if (dir) { 228 if (dir > 0) { 229 open = 1; 230 } else if (dir < 0) { 231 if (val > 0) { 232 open = 1; 233 val--; 234 } 235 } 236 } 237 if (hw_is_mask(var)) 238 changed = snd_mask_refine_min(hw_param_mask(params, var), 239 val + !!open); 240 else if (hw_is_interval(var)) 241 changed = snd_interval_refine_min(hw_param_interval(params, var), 242 val, open); 243 else 244 return -EINVAL; 245 if (changed) { 246 params->cmask |= 1 << var; 247 params->rmask |= 1 << var; 248 } 249 return changed; 250 } 251 252 /** 253 * snd_pcm_hw_param_min 254 * @pcm: PCM instance 255 * @params: the hw_params instance 256 * @var: parameter to retrieve 257 * @val: minimal value 258 * @dir: pointer to the direction (-1,0,1) or NULL 259 * 260 * Inside configuration space defined by PARAMS remove from PAR all 261 * values < VAL. Reduce configuration space accordingly. 262 * Return new minimum or -EINVAL if the configuration space is empty 263 */ 264 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 265 struct snd_pcm_hw_params *params, 266 snd_pcm_hw_param_t var, unsigned int val, 267 int *dir) 268 { 269 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 270 if (changed < 0) 271 return changed; 272 if (params->rmask) { 273 int err = snd_pcm_hw_refine(pcm, params); 274 if (err < 0) 275 return err; 276 } 277 return snd_pcm_hw_param_value_min(params, var, dir); 278 } 279 280 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 281 snd_pcm_hw_param_t var, unsigned int val, 282 int dir) 283 { 284 int changed; 285 int open = 0; 286 if (dir) { 287 if (dir < 0) { 288 open = 1; 289 } else if (dir > 0) { 290 open = 1; 291 val++; 292 } 293 } 294 if (hw_is_mask(var)) { 295 if (val == 0 && open) { 296 snd_mask_none(hw_param_mask(params, var)); 297 changed = -EINVAL; 298 } else 299 changed = snd_mask_refine_max(hw_param_mask(params, var), 300 val - !!open); 301 } else if (hw_is_interval(var)) 302 changed = snd_interval_refine_max(hw_param_interval(params, var), 303 val, open); 304 else 305 return -EINVAL; 306 if (changed) { 307 params->cmask |= 1 << var; 308 params->rmask |= 1 << var; 309 } 310 return changed; 311 } 312 313 /** 314 * snd_pcm_hw_param_max 315 * @pcm: PCM instance 316 * @params: the hw_params instance 317 * @var: parameter to retrieve 318 * @val: maximal value 319 * @dir: pointer to the direction (-1,0,1) or NULL 320 * 321 * Inside configuration space defined by PARAMS remove from PAR all 322 * values >= VAL + 1. Reduce configuration space accordingly. 323 * Return new maximum or -EINVAL if the configuration space is empty 324 */ 325 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 326 struct snd_pcm_hw_params *params, 327 snd_pcm_hw_param_t var, unsigned int val, 328 int *dir) 329 { 330 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 331 if (changed < 0) 332 return changed; 333 if (params->rmask) { 334 int err = snd_pcm_hw_refine(pcm, params); 335 if (err < 0) 336 return err; 337 } 338 return snd_pcm_hw_param_value_max(params, var, dir); 339 } 340 341 static int boundary_sub(int a, int adir, 342 int b, int bdir, 343 int *c, int *cdir) 344 { 345 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 346 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 347 *c = a - b; 348 *cdir = adir - bdir; 349 if (*cdir == -2) { 350 (*c)--; 351 } else if (*cdir == 2) { 352 (*c)++; 353 } 354 return 0; 355 } 356 357 static int boundary_lt(unsigned int a, int adir, 358 unsigned int b, int bdir) 359 { 360 if (adir < 0) { 361 a--; 362 adir = 1; 363 } else if (adir > 0) 364 adir = 1; 365 if (bdir < 0) { 366 b--; 367 bdir = 1; 368 } else if (bdir > 0) 369 bdir = 1; 370 return a < b || (a == b && adir < bdir); 371 } 372 373 /* Return 1 if min is nearer to best than max */ 374 static int boundary_nearer(int min, int mindir, 375 int best, int bestdir, 376 int max, int maxdir) 377 { 378 int dmin, dmindir; 379 int dmax, dmaxdir; 380 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 381 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 382 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 383 } 384 385 /** 386 * snd_pcm_hw_param_near 387 * @pcm: PCM instance 388 * @params: the hw_params instance 389 * @var: parameter to retrieve 390 * @best: value to set 391 * @dir: pointer to the direction (-1,0,1) or NULL 392 * 393 * Inside configuration space defined by PARAMS set PAR to the available value 394 * nearest to VAL. Reduce configuration space accordingly. 395 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 396 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 397 * Return the value found. 398 */ 399 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 400 struct snd_pcm_hw_params *params, 401 snd_pcm_hw_param_t var, unsigned int best, 402 int *dir) 403 { 404 struct snd_pcm_hw_params *save = NULL; 405 int v; 406 unsigned int saved_min; 407 int last = 0; 408 int min, max; 409 int mindir, maxdir; 410 int valdir = dir ? *dir : 0; 411 /* FIXME */ 412 if (best > INT_MAX) 413 best = INT_MAX; 414 min = max = best; 415 mindir = maxdir = valdir; 416 if (maxdir > 0) 417 maxdir = 0; 418 else if (maxdir == 0) 419 maxdir = -1; 420 else { 421 maxdir = 1; 422 max--; 423 } 424 save = kmalloc(sizeof(*save), GFP_KERNEL); 425 if (save == NULL) 426 return -ENOMEM; 427 *save = *params; 428 saved_min = min; 429 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 430 if (min >= 0) { 431 struct snd_pcm_hw_params *params1; 432 if (max < 0) 433 goto _end; 434 if ((unsigned int)min == saved_min && mindir == valdir) 435 goto _end; 436 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 437 if (params1 == NULL) { 438 kfree(save); 439 return -ENOMEM; 440 } 441 *params1 = *save; 442 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 443 if (max < 0) { 444 kfree(params1); 445 goto _end; 446 } 447 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 448 *params = *params1; 449 last = 1; 450 } 451 kfree(params1); 452 } else { 453 *params = *save; 454 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 455 if (max < 0) 456 return max; 457 last = 1; 458 } 459 _end: 460 kfree(save); 461 if (last) 462 v = snd_pcm_hw_param_last(pcm, params, var, dir); 463 else 464 v = snd_pcm_hw_param_first(pcm, params, var, dir); 465 snd_BUG_ON(v < 0); 466 return v; 467 } 468 469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 470 snd_pcm_hw_param_t var, unsigned int val, 471 int dir) 472 { 473 int changed; 474 if (hw_is_mask(var)) { 475 struct snd_mask *m = hw_param_mask(params, var); 476 if (val == 0 && dir < 0) { 477 changed = -EINVAL; 478 snd_mask_none(m); 479 } else { 480 if (dir > 0) 481 val++; 482 else if (dir < 0) 483 val--; 484 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 485 } 486 } else if (hw_is_interval(var)) { 487 struct snd_interval *i = hw_param_interval(params, var); 488 if (val == 0 && dir < 0) { 489 changed = -EINVAL; 490 snd_interval_none(i); 491 } else if (dir == 0) 492 changed = snd_interval_refine_set(i, val); 493 else { 494 struct snd_interval t; 495 t.openmin = 1; 496 t.openmax = 1; 497 t.empty = 0; 498 t.integer = 0; 499 if (dir < 0) { 500 t.min = val - 1; 501 t.max = val; 502 } else { 503 t.min = val; 504 t.max = val+1; 505 } 506 changed = snd_interval_refine(i, &t); 507 } 508 } else 509 return -EINVAL; 510 if (changed) { 511 params->cmask |= 1 << var; 512 params->rmask |= 1 << var; 513 } 514 return changed; 515 } 516 517 /** 518 * snd_pcm_hw_param_set 519 * @pcm: PCM instance 520 * @params: the hw_params instance 521 * @var: parameter to retrieve 522 * @val: value to set 523 * @dir: pointer to the direction (-1,0,1) or NULL 524 * 525 * Inside configuration space defined by PARAMS remove from PAR all 526 * values != VAL. Reduce configuration space accordingly. 527 * Return VAL or -EINVAL if the configuration space is empty 528 */ 529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 530 struct snd_pcm_hw_params *params, 531 snd_pcm_hw_param_t var, unsigned int val, 532 int dir) 533 { 534 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 535 if (changed < 0) 536 return changed; 537 if (params->rmask) { 538 int err = snd_pcm_hw_refine(pcm, params); 539 if (err < 0) 540 return err; 541 } 542 return snd_pcm_hw_param_value(params, var, NULL); 543 } 544 545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 546 snd_pcm_hw_param_t var) 547 { 548 int changed; 549 changed = snd_interval_setinteger(hw_param_interval(params, var)); 550 if (changed) { 551 params->cmask |= 1 << var; 552 params->rmask |= 1 << var; 553 } 554 return changed; 555 } 556 557 /* 558 * plugin 559 */ 560 561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 563 { 564 struct snd_pcm_runtime *runtime = substream->runtime; 565 struct snd_pcm_plugin *plugin, *next; 566 567 plugin = runtime->oss.plugin_first; 568 while (plugin) { 569 next = plugin->next; 570 snd_pcm_plugin_free(plugin); 571 plugin = next; 572 } 573 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 574 return 0; 575 } 576 577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 578 { 579 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 580 plugin->next = runtime->oss.plugin_first; 581 plugin->prev = NULL; 582 if (runtime->oss.plugin_first) { 583 runtime->oss.plugin_first->prev = plugin; 584 runtime->oss.plugin_first = plugin; 585 } else { 586 runtime->oss.plugin_last = 587 runtime->oss.plugin_first = plugin; 588 } 589 return 0; 590 } 591 592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 593 { 594 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 595 plugin->next = NULL; 596 plugin->prev = runtime->oss.plugin_last; 597 if (runtime->oss.plugin_last) { 598 runtime->oss.plugin_last->next = plugin; 599 runtime->oss.plugin_last = plugin; 600 } else { 601 runtime->oss.plugin_last = 602 runtime->oss.plugin_first = plugin; 603 } 604 return 0; 605 } 606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 607 608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 609 { 610 struct snd_pcm_runtime *runtime = substream->runtime; 611 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 612 long bytes = frames_to_bytes(runtime, frames); 613 if (buffer_size == runtime->oss.buffer_bytes) 614 return bytes; 615 #if BITS_PER_LONG >= 64 616 return runtime->oss.buffer_bytes * bytes / buffer_size; 617 #else 618 { 619 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 620 u32 rem; 621 div64_32(&bsize, buffer_size, &rem); 622 return (long)bsize; 623 } 624 #endif 625 } 626 627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 628 { 629 struct snd_pcm_runtime *runtime = substream->runtime; 630 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 631 if (buffer_size == runtime->oss.buffer_bytes) 632 return bytes_to_frames(runtime, bytes); 633 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 634 } 635 636 /* define extended formats in the recent OSS versions (if any) */ 637 /* linear formats */ 638 #define AFMT_S32_LE 0x00001000 639 #define AFMT_S32_BE 0x00002000 640 #define AFMT_S24_LE 0x00008000 641 #define AFMT_S24_BE 0x00010000 642 #define AFMT_S24_PACKED 0x00040000 643 644 /* other supported formats */ 645 #define AFMT_FLOAT 0x00004000 646 #define AFMT_SPDIF_RAW 0x00020000 647 648 /* unsupported formats */ 649 #define AFMT_AC3 0x00000400 650 #define AFMT_VORBIS 0x00000800 651 652 static int snd_pcm_oss_format_from(int format) 653 { 654 switch (format) { 655 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 656 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 657 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 658 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 659 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 660 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 661 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 662 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 663 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 664 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 665 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 666 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 667 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 668 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 669 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 670 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 671 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 672 default: return SNDRV_PCM_FORMAT_U8; 673 } 674 } 675 676 static int snd_pcm_oss_format_to(int format) 677 { 678 switch (format) { 679 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 680 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 681 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 682 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 683 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 684 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 685 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 686 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 687 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 688 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 689 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 690 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 691 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 692 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 693 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 694 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 695 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 696 default: return -EINVAL; 697 } 698 } 699 700 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 701 struct snd_pcm_hw_params *oss_params, 702 struct snd_pcm_hw_params *slave_params) 703 { 704 size_t s; 705 size_t oss_buffer_size, oss_period_size, oss_periods; 706 size_t min_period_size, max_period_size; 707 struct snd_pcm_runtime *runtime = substream->runtime; 708 size_t oss_frame_size; 709 710 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 711 params_channels(oss_params) / 8; 712 713 oss_buffer_size = snd_pcm_plug_client_size(substream, 714 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 715 oss_buffer_size = 1 << ld2(oss_buffer_size); 716 if (atomic_read(&substream->mmap_count)) { 717 if (oss_buffer_size > runtime->oss.mmap_bytes) 718 oss_buffer_size = runtime->oss.mmap_bytes; 719 } 720 721 if (substream->oss.setup.period_size > 16) 722 oss_period_size = substream->oss.setup.period_size; 723 else if (runtime->oss.fragshift) { 724 oss_period_size = 1 << runtime->oss.fragshift; 725 if (oss_period_size > oss_buffer_size / 2) 726 oss_period_size = oss_buffer_size / 2; 727 } else { 728 int sd; 729 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 730 731 oss_period_size = oss_buffer_size; 732 do { 733 oss_period_size /= 2; 734 } while (oss_period_size > bytes_per_sec); 735 if (runtime->oss.subdivision == 0) { 736 sd = 4; 737 if (oss_period_size / sd > 4096) 738 sd *= 2; 739 if (oss_period_size / sd < 4096) 740 sd = 1; 741 } else 742 sd = runtime->oss.subdivision; 743 oss_period_size /= sd; 744 if (oss_period_size < 16) 745 oss_period_size = 16; 746 } 747 748 min_period_size = snd_pcm_plug_client_size(substream, 749 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 750 min_period_size *= oss_frame_size; 751 min_period_size = 1 << (ld2(min_period_size - 1) + 1); 752 if (oss_period_size < min_period_size) 753 oss_period_size = min_period_size; 754 755 max_period_size = snd_pcm_plug_client_size(substream, 756 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 757 max_period_size *= oss_frame_size; 758 max_period_size = 1 << ld2(max_period_size); 759 if (oss_period_size > max_period_size) 760 oss_period_size = max_period_size; 761 762 oss_periods = oss_buffer_size / oss_period_size; 763 764 if (substream->oss.setup.periods > 1) 765 oss_periods = substream->oss.setup.periods; 766 767 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 768 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 769 s = runtime->oss.maxfrags; 770 if (oss_periods > s) 771 oss_periods = s; 772 773 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 774 if (s < 2) 775 s = 2; 776 if (oss_periods < s) 777 oss_periods = s; 778 779 while (oss_period_size * oss_periods > oss_buffer_size) 780 oss_period_size /= 2; 781 782 if (oss_period_size < 16) 783 return -EINVAL; 784 runtime->oss.period_bytes = oss_period_size; 785 runtime->oss.period_frames = 1; 786 runtime->oss.periods = oss_periods; 787 return 0; 788 } 789 790 static int choose_rate(struct snd_pcm_substream *substream, 791 struct snd_pcm_hw_params *params, unsigned int best_rate) 792 { 793 struct snd_interval *it; 794 struct snd_pcm_hw_params *save; 795 unsigned int rate, prev; 796 797 save = kmalloc(sizeof(*save), GFP_KERNEL); 798 if (save == NULL) 799 return -ENOMEM; 800 *save = *params; 801 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 802 803 /* try multiples of the best rate */ 804 rate = best_rate; 805 for (;;) { 806 if (it->max < rate || (it->max == rate && it->openmax)) 807 break; 808 if (it->min < rate || (it->min == rate && !it->openmin)) { 809 int ret; 810 ret = snd_pcm_hw_param_set(substream, params, 811 SNDRV_PCM_HW_PARAM_RATE, 812 rate, 0); 813 if (ret == (int)rate) { 814 kfree(save); 815 return rate; 816 } 817 *params = *save; 818 } 819 prev = rate; 820 rate += best_rate; 821 if (rate <= prev) 822 break; 823 } 824 825 /* not found, use the nearest rate */ 826 kfree(save); 827 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 828 } 829 830 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 831 { 832 struct snd_pcm_runtime *runtime = substream->runtime; 833 struct snd_pcm_hw_params *params, *sparams; 834 struct snd_pcm_sw_params *sw_params; 835 ssize_t oss_buffer_size, oss_period_size; 836 size_t oss_frame_size; 837 int err; 838 int direct; 839 int format, sformat, n; 840 struct snd_mask sformat_mask; 841 struct snd_mask mask; 842 843 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 844 return -EINTR; 845 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 846 params = kmalloc(sizeof(*params), GFP_KERNEL); 847 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 848 if (!sw_params || !params || !sparams) { 849 snd_printd("No memory\n"); 850 err = -ENOMEM; 851 goto failure; 852 } 853 854 if (atomic_read(&substream->mmap_count)) 855 direct = 1; 856 else 857 direct = substream->oss.setup.direct; 858 859 _snd_pcm_hw_params_any(sparams); 860 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 861 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 862 snd_mask_none(&mask); 863 if (atomic_read(&substream->mmap_count)) 864 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 865 else { 866 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); 867 if (!direct) 868 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 869 } 870 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 871 if (err < 0) { 872 snd_printd("No usable accesses\n"); 873 err = -EINVAL; 874 goto failure; 875 } 876 choose_rate(substream, sparams, runtime->oss.rate); 877 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 878 879 format = snd_pcm_oss_format_from(runtime->oss.format); 880 881 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 882 if (direct) 883 sformat = format; 884 else 885 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 886 887 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { 888 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { 889 if (snd_mask_test(&sformat_mask, sformat) && 890 snd_pcm_oss_format_to(sformat) >= 0) 891 break; 892 } 893 if (sformat > SNDRV_PCM_FORMAT_LAST) { 894 snd_printd("Cannot find a format!!!\n"); 895 err = -EINVAL; 896 goto failure; 897 } 898 } 899 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); 900 if (err < 0) 901 goto failure; 902 903 if (direct) { 904 memcpy(params, sparams, sizeof(*params)); 905 } else { 906 _snd_pcm_hw_params_any(params); 907 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 908 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 910 snd_pcm_oss_format_from(runtime->oss.format), 0); 911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 912 runtime->oss.channels, 0); 913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 914 runtime->oss.rate, 0); 915 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 916 params_access(params), params_format(params), 917 params_channels(params), params_rate(params)); 918 } 919 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 920 params_access(sparams), params_format(sparams), 921 params_channels(sparams), params_rate(sparams)); 922 923 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 924 params_channels(params) / 8; 925 926 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 927 snd_pcm_oss_plugin_clear(substream); 928 if (!direct) { 929 /* add necessary plugins */ 930 snd_pcm_oss_plugin_clear(substream); 931 if ((err = snd_pcm_plug_format_plugins(substream, 932 params, 933 sparams)) < 0) { 934 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); 935 snd_pcm_oss_plugin_clear(substream); 936 goto failure; 937 } 938 if (runtime->oss.plugin_first) { 939 struct snd_pcm_plugin *plugin; 940 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 941 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 942 snd_pcm_oss_plugin_clear(substream); 943 goto failure; 944 } 945 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 946 err = snd_pcm_plugin_append(plugin); 947 } else { 948 err = snd_pcm_plugin_insert(plugin); 949 } 950 if (err < 0) { 951 snd_pcm_oss_plugin_clear(substream); 952 goto failure; 953 } 954 } 955 } 956 #endif 957 958 err = snd_pcm_oss_period_size(substream, params, sparams); 959 if (err < 0) 960 goto failure; 961 962 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 963 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 964 if (err < 0) 965 goto failure; 966 967 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 968 runtime->oss.periods, NULL); 969 if (err < 0) 970 goto failure; 971 972 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 973 974 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 975 snd_printd("HW_PARAMS failed: %i\n", err); 976 goto failure; 977 } 978 979 memset(sw_params, 0, sizeof(*sw_params)); 980 if (runtime->oss.trigger) { 981 sw_params->start_threshold = 1; 982 } else { 983 sw_params->start_threshold = runtime->boundary; 984 } 985 if (atomic_read(&substream->mmap_count) || 986 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 987 sw_params->stop_threshold = runtime->boundary; 988 else 989 sw_params->stop_threshold = runtime->buffer_size; 990 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 991 sw_params->period_step = 1; 992 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 993 1 : runtime->period_size; 994 if (atomic_read(&substream->mmap_count) || 995 substream->oss.setup.nosilence) { 996 sw_params->silence_threshold = 0; 997 sw_params->silence_size = 0; 998 } else { 999 snd_pcm_uframes_t frames; 1000 frames = runtime->period_size + 16; 1001 if (frames > runtime->buffer_size) 1002 frames = runtime->buffer_size; 1003 sw_params->silence_threshold = frames; 1004 sw_params->silence_size = frames; 1005 } 1006 1007 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1008 snd_printd("SW_PARAMS failed: %i\n", err); 1009 goto failure; 1010 } 1011 1012 runtime->oss.periods = params_periods(sparams); 1013 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1014 if (oss_period_size < 0) { 1015 err = -EINVAL; 1016 goto failure; 1017 } 1018 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1019 if (runtime->oss.plugin_first) { 1020 err = snd_pcm_plug_alloc(substream, oss_period_size); 1021 if (err < 0) 1022 goto failure; 1023 } 1024 #endif 1025 oss_period_size *= oss_frame_size; 1026 1027 oss_buffer_size = oss_period_size * runtime->oss.periods; 1028 if (oss_buffer_size < 0) { 1029 err = -EINVAL; 1030 goto failure; 1031 } 1032 1033 runtime->oss.period_bytes = oss_period_size; 1034 runtime->oss.buffer_bytes = oss_buffer_size; 1035 1036 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1037 runtime->oss.period_bytes, 1038 runtime->oss.buffer_bytes); 1039 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1040 params_period_size(sparams), 1041 params_buffer_size(sparams)); 1042 1043 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1044 runtime->oss.channels = params_channels(params); 1045 runtime->oss.rate = params_rate(params); 1046 1047 runtime->oss.params = 0; 1048 runtime->oss.prepare = 1; 1049 vfree(runtime->oss.buffer); 1050 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1051 runtime->oss.buffer_used = 0; 1052 if (runtime->dma_area) 1053 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1054 1055 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1056 1057 err = 0; 1058 failure: 1059 kfree(sw_params); 1060 kfree(params); 1061 kfree(sparams); 1062 mutex_unlock(&runtime->oss.params_lock); 1063 return err; 1064 } 1065 1066 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1067 { 1068 int idx, err; 1069 struct snd_pcm_substream *asubstream = NULL, *substream; 1070 1071 for (idx = 0; idx < 2; idx++) { 1072 substream = pcm_oss_file->streams[idx]; 1073 if (substream == NULL) 1074 continue; 1075 if (asubstream == NULL) 1076 asubstream = substream; 1077 if (substream->runtime->oss.params) { 1078 err = snd_pcm_oss_change_params(substream); 1079 if (err < 0) 1080 return err; 1081 } 1082 } 1083 if (!asubstream) 1084 return -EIO; 1085 if (r_substream) 1086 *r_substream = asubstream; 1087 return 0; 1088 } 1089 1090 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1091 { 1092 int err; 1093 struct snd_pcm_runtime *runtime = substream->runtime; 1094 1095 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1096 if (err < 0) { 1097 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1098 return err; 1099 } 1100 runtime->oss.prepare = 0; 1101 runtime->oss.prev_hw_ptr_interrupt = 0; 1102 runtime->oss.period_ptr = 0; 1103 runtime->oss.buffer_used = 0; 1104 1105 return 0; 1106 } 1107 1108 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1109 { 1110 struct snd_pcm_runtime *runtime; 1111 int err; 1112 1113 if (substream == NULL) 1114 return 0; 1115 runtime = substream->runtime; 1116 if (runtime->oss.params) { 1117 err = snd_pcm_oss_change_params(substream); 1118 if (err < 0) 1119 return err; 1120 } 1121 if (runtime->oss.prepare) { 1122 err = snd_pcm_oss_prepare(substream); 1123 if (err < 0) 1124 return err; 1125 } 1126 return 0; 1127 } 1128 1129 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1130 { 1131 struct snd_pcm_runtime *runtime; 1132 snd_pcm_uframes_t frames; 1133 int err = 0; 1134 1135 while (1) { 1136 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1137 if (err < 0) 1138 break; 1139 runtime = substream->runtime; 1140 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1141 break; 1142 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1143 /* until avail(delay) <= buffer_size */ 1144 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1145 frames /= runtime->period_size; 1146 frames *= runtime->period_size; 1147 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1148 if (err < 0) 1149 break; 1150 } 1151 return err; 1152 } 1153 1154 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1155 { 1156 struct snd_pcm_runtime *runtime = substream->runtime; 1157 int ret; 1158 while (1) { 1159 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1160 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1161 #ifdef OSS_DEBUG 1162 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1163 printk(KERN_DEBUG "pcm_oss: write: " 1164 "recovering from XRUN\n"); 1165 else 1166 printk(KERN_DEBUG "pcm_oss: write: " 1167 "recovering from SUSPEND\n"); 1168 #endif 1169 ret = snd_pcm_oss_prepare(substream); 1170 if (ret < 0) 1171 break; 1172 } 1173 if (in_kernel) { 1174 mm_segment_t fs; 1175 fs = snd_enter_user(); 1176 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1177 snd_leave_user(fs); 1178 } else { 1179 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1180 } 1181 if (ret != -EPIPE && ret != -ESTRPIPE) 1182 break; 1183 /* test, if we can't store new data, because the stream */ 1184 /* has not been started */ 1185 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1186 return -EAGAIN; 1187 } 1188 return ret; 1189 } 1190 1191 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1192 { 1193 struct snd_pcm_runtime *runtime = substream->runtime; 1194 snd_pcm_sframes_t delay; 1195 int ret; 1196 while (1) { 1197 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1198 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1199 #ifdef OSS_DEBUG 1200 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1201 printk(KERN_DEBUG "pcm_oss: read: " 1202 "recovering from XRUN\n"); 1203 else 1204 printk(KERN_DEBUG "pcm_oss: read: " 1205 "recovering from SUSPEND\n"); 1206 #endif 1207 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1208 if (ret < 0) 1209 break; 1210 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1211 ret = snd_pcm_oss_prepare(substream); 1212 if (ret < 0) 1213 break; 1214 } 1215 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1216 if (ret < 0) 1217 break; 1218 if (in_kernel) { 1219 mm_segment_t fs; 1220 fs = snd_enter_user(); 1221 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1222 snd_leave_user(fs); 1223 } else { 1224 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1225 } 1226 if (ret == -EPIPE) { 1227 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1228 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1229 if (ret < 0) 1230 break; 1231 } 1232 continue; 1233 } 1234 if (ret != -ESTRPIPE) 1235 break; 1236 } 1237 return ret; 1238 } 1239 1240 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1241 { 1242 struct snd_pcm_runtime *runtime = substream->runtime; 1243 int ret; 1244 while (1) { 1245 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1246 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1247 #ifdef OSS_DEBUG 1248 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1249 printk(KERN_DEBUG "pcm_oss: writev: " 1250 "recovering from XRUN\n"); 1251 else 1252 printk(KERN_DEBUG "pcm_oss: writev: " 1253 "recovering from SUSPEND\n"); 1254 #endif 1255 ret = snd_pcm_oss_prepare(substream); 1256 if (ret < 0) 1257 break; 1258 } 1259 if (in_kernel) { 1260 mm_segment_t fs; 1261 fs = snd_enter_user(); 1262 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1263 snd_leave_user(fs); 1264 } else { 1265 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1266 } 1267 if (ret != -EPIPE && ret != -ESTRPIPE) 1268 break; 1269 1270 /* test, if we can't store new data, because the stream */ 1271 /* has not been started */ 1272 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1273 return -EAGAIN; 1274 } 1275 return ret; 1276 } 1277 1278 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1279 { 1280 struct snd_pcm_runtime *runtime = substream->runtime; 1281 int ret; 1282 while (1) { 1283 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1284 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1285 #ifdef OSS_DEBUG 1286 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1287 printk(KERN_DEBUG "pcm_oss: readv: " 1288 "recovering from XRUN\n"); 1289 else 1290 printk(KERN_DEBUG "pcm_oss: readv: " 1291 "recovering from SUSPEND\n"); 1292 #endif 1293 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1294 if (ret < 0) 1295 break; 1296 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1297 ret = snd_pcm_oss_prepare(substream); 1298 if (ret < 0) 1299 break; 1300 } 1301 if (in_kernel) { 1302 mm_segment_t fs; 1303 fs = snd_enter_user(); 1304 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1305 snd_leave_user(fs); 1306 } else { 1307 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1308 } 1309 if (ret != -EPIPE && ret != -ESTRPIPE) 1310 break; 1311 } 1312 return ret; 1313 } 1314 1315 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1316 { 1317 struct snd_pcm_runtime *runtime = substream->runtime; 1318 snd_pcm_sframes_t frames, frames1; 1319 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1320 if (runtime->oss.plugin_first) { 1321 struct snd_pcm_plugin_channel *channels; 1322 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1323 if (!in_kernel) { 1324 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) 1325 return -EFAULT; 1326 buf = runtime->oss.buffer; 1327 } 1328 frames = bytes / oss_frame_bytes; 1329 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1330 if (frames1 < 0) 1331 return frames1; 1332 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1333 if (frames1 <= 0) 1334 return frames1; 1335 bytes = frames1 * oss_frame_bytes; 1336 } else 1337 #endif 1338 { 1339 frames = bytes_to_frames(runtime, bytes); 1340 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1341 if (frames1 <= 0) 1342 return frames1; 1343 bytes = frames_to_bytes(runtime, frames1); 1344 } 1345 return bytes; 1346 } 1347 1348 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1349 { 1350 size_t xfer = 0; 1351 ssize_t tmp; 1352 struct snd_pcm_runtime *runtime = substream->runtime; 1353 1354 if (atomic_read(&substream->mmap_count)) 1355 return -ENXIO; 1356 1357 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1358 return tmp; 1359 mutex_lock(&runtime->oss.params_lock); 1360 while (bytes > 0) { 1361 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1362 tmp = bytes; 1363 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1364 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1365 if (tmp > 0) { 1366 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1367 tmp = -EFAULT; 1368 goto err; 1369 } 1370 } 1371 runtime->oss.buffer_used += tmp; 1372 buf += tmp; 1373 bytes -= tmp; 1374 xfer += tmp; 1375 if (substream->oss.setup.partialfrag || 1376 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1377 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1378 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1379 if (tmp <= 0) 1380 goto err; 1381 runtime->oss.bytes += tmp; 1382 runtime->oss.period_ptr += tmp; 1383 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1384 if (runtime->oss.period_ptr == 0 || 1385 runtime->oss.period_ptr == runtime->oss.buffer_used) 1386 runtime->oss.buffer_used = 0; 1387 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1388 tmp = -EAGAIN; 1389 goto err; 1390 } 1391 } 1392 } else { 1393 tmp = snd_pcm_oss_write2(substream, 1394 (const char __force *)buf, 1395 runtime->oss.period_bytes, 0); 1396 if (tmp <= 0) 1397 goto err; 1398 runtime->oss.bytes += tmp; 1399 buf += tmp; 1400 bytes -= tmp; 1401 xfer += tmp; 1402 if ((substream->f_flags & O_NONBLOCK) != 0 && 1403 tmp != runtime->oss.period_bytes) 1404 break; 1405 } 1406 } 1407 mutex_unlock(&runtime->oss.params_lock); 1408 return xfer; 1409 1410 err: 1411 mutex_unlock(&runtime->oss.params_lock); 1412 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1413 } 1414 1415 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1416 { 1417 struct snd_pcm_runtime *runtime = substream->runtime; 1418 snd_pcm_sframes_t frames, frames1; 1419 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1420 char __user *final_dst = (char __user *)buf; 1421 if (runtime->oss.plugin_first) { 1422 struct snd_pcm_plugin_channel *channels; 1423 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1424 if (!in_kernel) 1425 buf = runtime->oss.buffer; 1426 frames = bytes / oss_frame_bytes; 1427 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1428 if (frames1 < 0) 1429 return frames1; 1430 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1431 if (frames1 <= 0) 1432 return frames1; 1433 bytes = frames1 * oss_frame_bytes; 1434 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1435 return -EFAULT; 1436 } else 1437 #endif 1438 { 1439 frames = bytes_to_frames(runtime, bytes); 1440 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1441 if (frames1 <= 0) 1442 return frames1; 1443 bytes = frames_to_bytes(runtime, frames1); 1444 } 1445 return bytes; 1446 } 1447 1448 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1449 { 1450 size_t xfer = 0; 1451 ssize_t tmp; 1452 struct snd_pcm_runtime *runtime = substream->runtime; 1453 1454 if (atomic_read(&substream->mmap_count)) 1455 return -ENXIO; 1456 1457 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1458 return tmp; 1459 mutex_lock(&runtime->oss.params_lock); 1460 while (bytes > 0) { 1461 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1462 if (runtime->oss.buffer_used == 0) { 1463 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1464 if (tmp <= 0) 1465 goto err; 1466 runtime->oss.bytes += tmp; 1467 runtime->oss.period_ptr = tmp; 1468 runtime->oss.buffer_used = tmp; 1469 } 1470 tmp = bytes; 1471 if ((size_t) tmp > runtime->oss.buffer_used) 1472 tmp = runtime->oss.buffer_used; 1473 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1474 tmp = -EFAULT; 1475 goto err; 1476 } 1477 buf += tmp; 1478 bytes -= tmp; 1479 xfer += tmp; 1480 runtime->oss.buffer_used -= tmp; 1481 } else { 1482 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1483 runtime->oss.period_bytes, 0); 1484 if (tmp <= 0) 1485 goto err; 1486 runtime->oss.bytes += tmp; 1487 buf += tmp; 1488 bytes -= tmp; 1489 xfer += tmp; 1490 } 1491 } 1492 mutex_unlock(&runtime->oss.params_lock); 1493 return xfer; 1494 1495 err: 1496 mutex_unlock(&runtime->oss.params_lock); 1497 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1498 } 1499 1500 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1501 { 1502 struct snd_pcm_substream *substream; 1503 1504 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1505 if (substream != NULL) { 1506 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1507 substream->runtime->oss.prepare = 1; 1508 } 1509 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1510 if (substream != NULL) { 1511 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1512 substream->runtime->oss.prepare = 1; 1513 } 1514 return 0; 1515 } 1516 1517 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1518 { 1519 struct snd_pcm_substream *substream; 1520 int err; 1521 1522 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1523 if (substream != NULL) { 1524 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1525 return err; 1526 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1527 } 1528 /* note: all errors from the start action are ignored */ 1529 /* OSS apps do not know, how to handle them */ 1530 return 0; 1531 } 1532 1533 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1534 { 1535 struct snd_pcm_runtime *runtime; 1536 ssize_t result = 0; 1537 long res; 1538 wait_queue_t wait; 1539 1540 runtime = substream->runtime; 1541 init_waitqueue_entry(&wait, current); 1542 add_wait_queue(&runtime->sleep, &wait); 1543 #ifdef OSS_DEBUG 1544 printk(KERN_DEBUG "sync1: size = %li\n", size); 1545 #endif 1546 while (1) { 1547 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1548 if (result > 0) { 1549 runtime->oss.buffer_used = 0; 1550 result = 0; 1551 break; 1552 } 1553 if (result != 0 && result != -EAGAIN) 1554 break; 1555 result = 0; 1556 set_current_state(TASK_INTERRUPTIBLE); 1557 snd_pcm_stream_lock_irq(substream); 1558 res = runtime->status->state; 1559 snd_pcm_stream_unlock_irq(substream); 1560 if (res != SNDRV_PCM_STATE_RUNNING) { 1561 set_current_state(TASK_RUNNING); 1562 break; 1563 } 1564 res = schedule_timeout(10 * HZ); 1565 if (signal_pending(current)) { 1566 result = -ERESTARTSYS; 1567 break; 1568 } 1569 if (res == 0) { 1570 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1571 result = -EIO; 1572 break; 1573 } 1574 } 1575 remove_wait_queue(&runtime->sleep, &wait); 1576 return result; 1577 } 1578 1579 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1580 { 1581 int err = 0; 1582 unsigned int saved_f_flags; 1583 struct snd_pcm_substream *substream; 1584 struct snd_pcm_runtime *runtime; 1585 snd_pcm_format_t format; 1586 unsigned long width; 1587 size_t size; 1588 1589 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1590 if (substream != NULL) { 1591 runtime = substream->runtime; 1592 if (atomic_read(&substream->mmap_count)) 1593 goto __direct; 1594 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1595 return err; 1596 format = snd_pcm_oss_format_from(runtime->oss.format); 1597 width = snd_pcm_format_physical_width(format); 1598 mutex_lock(&runtime->oss.params_lock); 1599 if (runtime->oss.buffer_used > 0) { 1600 #ifdef OSS_DEBUG 1601 printk(KERN_DEBUG "sync: buffer_used\n"); 1602 #endif 1603 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1604 snd_pcm_format_set_silence(format, 1605 runtime->oss.buffer + runtime->oss.buffer_used, 1606 size); 1607 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1608 if (err < 0) { 1609 mutex_unlock(&runtime->oss.params_lock); 1610 return err; 1611 } 1612 } else if (runtime->oss.period_ptr > 0) { 1613 #ifdef OSS_DEBUG 1614 printk(KERN_DEBUG "sync: period_ptr\n"); 1615 #endif 1616 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1617 snd_pcm_format_set_silence(format, 1618 runtime->oss.buffer, 1619 size * 8 / width); 1620 err = snd_pcm_oss_sync1(substream, size); 1621 if (err < 0) { 1622 mutex_unlock(&runtime->oss.params_lock); 1623 return err; 1624 } 1625 } 1626 /* 1627 * The ALSA's period might be a bit large than OSS one. 1628 * Fill the remain portion of ALSA period with zeros. 1629 */ 1630 size = runtime->control->appl_ptr % runtime->period_size; 1631 if (size > 0) { 1632 size = runtime->period_size - size; 1633 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1634 size = (runtime->frame_bits * size) / 8; 1635 while (size > 0) { 1636 mm_segment_t fs; 1637 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1638 size -= size1; 1639 size1 *= 8; 1640 size1 /= runtime->sample_bits; 1641 snd_pcm_format_set_silence(runtime->format, 1642 runtime->oss.buffer, 1643 size1); 1644 size1 /= runtime->channels; /* frames */ 1645 fs = snd_enter_user(); 1646 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1647 snd_leave_user(fs); 1648 } 1649 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1650 void __user *buffers[runtime->channels]; 1651 memset(buffers, 0, runtime->channels * sizeof(void *)); 1652 snd_pcm_lib_writev(substream, buffers, size); 1653 } 1654 } 1655 mutex_unlock(&runtime->oss.params_lock); 1656 /* 1657 * finish sync: drain the buffer 1658 */ 1659 __direct: 1660 saved_f_flags = substream->f_flags; 1661 substream->f_flags &= ~O_NONBLOCK; 1662 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1663 substream->f_flags = saved_f_flags; 1664 if (err < 0) 1665 return err; 1666 runtime->oss.prepare = 1; 1667 } 1668 1669 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1670 if (substream != NULL) { 1671 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1672 return err; 1673 runtime = substream->runtime; 1674 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1675 if (err < 0) 1676 return err; 1677 runtime->oss.buffer_used = 0; 1678 runtime->oss.prepare = 1; 1679 } 1680 return 0; 1681 } 1682 1683 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1684 { 1685 int idx; 1686 1687 for (idx = 1; idx >= 0; --idx) { 1688 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1689 struct snd_pcm_runtime *runtime; 1690 if (substream == NULL) 1691 continue; 1692 runtime = substream->runtime; 1693 if (rate < 1000) 1694 rate = 1000; 1695 else if (rate > 192000) 1696 rate = 192000; 1697 if (runtime->oss.rate != rate) { 1698 runtime->oss.params = 1; 1699 runtime->oss.rate = rate; 1700 } 1701 } 1702 return snd_pcm_oss_get_rate(pcm_oss_file); 1703 } 1704 1705 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1706 { 1707 struct snd_pcm_substream *substream; 1708 int err; 1709 1710 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1711 return err; 1712 return substream->runtime->oss.rate; 1713 } 1714 1715 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1716 { 1717 int idx; 1718 if (channels < 1) 1719 channels = 1; 1720 if (channels > 128) 1721 return -EINVAL; 1722 for (idx = 1; idx >= 0; --idx) { 1723 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1724 struct snd_pcm_runtime *runtime; 1725 if (substream == NULL) 1726 continue; 1727 runtime = substream->runtime; 1728 if (runtime->oss.channels != channels) { 1729 runtime->oss.params = 1; 1730 runtime->oss.channels = channels; 1731 } 1732 } 1733 return snd_pcm_oss_get_channels(pcm_oss_file); 1734 } 1735 1736 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1737 { 1738 struct snd_pcm_substream *substream; 1739 int err; 1740 1741 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1742 return err; 1743 return substream->runtime->oss.channels; 1744 } 1745 1746 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1747 { 1748 struct snd_pcm_substream *substream; 1749 int err; 1750 1751 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1752 return err; 1753 return substream->runtime->oss.period_bytes; 1754 } 1755 1756 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1757 { 1758 struct snd_pcm_substream *substream; 1759 int err; 1760 int direct; 1761 struct snd_pcm_hw_params *params; 1762 unsigned int formats = 0; 1763 struct snd_mask format_mask; 1764 int fmt; 1765 1766 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1767 return err; 1768 if (atomic_read(&substream->mmap_count)) 1769 direct = 1; 1770 else 1771 direct = substream->oss.setup.direct; 1772 if (!direct) 1773 return AFMT_MU_LAW | AFMT_U8 | 1774 AFMT_S16_LE | AFMT_S16_BE | 1775 AFMT_S8 | AFMT_U16_LE | 1776 AFMT_U16_BE | 1777 AFMT_S32_LE | AFMT_S32_BE | 1778 AFMT_S24_LE | AFMT_S24_BE | 1779 AFMT_S24_PACKED; 1780 params = kmalloc(sizeof(*params), GFP_KERNEL); 1781 if (!params) 1782 return -ENOMEM; 1783 _snd_pcm_hw_params_any(params); 1784 err = snd_pcm_hw_refine(substream, params); 1785 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1786 kfree(params); 1787 if (err < 0) 1788 return err; 1789 for (fmt = 0; fmt < 32; ++fmt) { 1790 if (snd_mask_test(&format_mask, fmt)) { 1791 int f = snd_pcm_oss_format_to(fmt); 1792 if (f >= 0) 1793 formats |= f; 1794 } 1795 } 1796 return formats; 1797 } 1798 1799 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1800 { 1801 int formats, idx; 1802 1803 if (format != AFMT_QUERY) { 1804 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1805 if (formats < 0) 1806 return formats; 1807 if (!(formats & format)) 1808 format = AFMT_U8; 1809 for (idx = 1; idx >= 0; --idx) { 1810 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1811 struct snd_pcm_runtime *runtime; 1812 if (substream == NULL) 1813 continue; 1814 runtime = substream->runtime; 1815 if (runtime->oss.format != format) { 1816 runtime->oss.params = 1; 1817 runtime->oss.format = format; 1818 } 1819 } 1820 } 1821 return snd_pcm_oss_get_format(pcm_oss_file); 1822 } 1823 1824 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1825 { 1826 struct snd_pcm_substream *substream; 1827 int err; 1828 1829 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1830 return err; 1831 return substream->runtime->oss.format; 1832 } 1833 1834 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1835 { 1836 struct snd_pcm_runtime *runtime; 1837 1838 if (substream == NULL) 1839 return 0; 1840 runtime = substream->runtime; 1841 if (subdivide == 0) { 1842 subdivide = runtime->oss.subdivision; 1843 if (subdivide == 0) 1844 subdivide = 1; 1845 return subdivide; 1846 } 1847 if (runtime->oss.subdivision || runtime->oss.fragshift) 1848 return -EINVAL; 1849 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1850 subdivide != 8 && subdivide != 16) 1851 return -EINVAL; 1852 runtime->oss.subdivision = subdivide; 1853 runtime->oss.params = 1; 1854 return subdivide; 1855 } 1856 1857 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1858 { 1859 int err = -EINVAL, idx; 1860 1861 for (idx = 1; idx >= 0; --idx) { 1862 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1863 if (substream == NULL) 1864 continue; 1865 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1866 return err; 1867 } 1868 return err; 1869 } 1870 1871 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1872 { 1873 struct snd_pcm_runtime *runtime; 1874 1875 if (substream == NULL) 1876 return 0; 1877 runtime = substream->runtime; 1878 if (runtime->oss.subdivision || runtime->oss.fragshift) 1879 return -EINVAL; 1880 runtime->oss.fragshift = val & 0xffff; 1881 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1882 if (runtime->oss.fragshift < 4) /* < 16 */ 1883 runtime->oss.fragshift = 4; 1884 if (runtime->oss.maxfrags < 2) 1885 runtime->oss.maxfrags = 2; 1886 runtime->oss.params = 1; 1887 return 0; 1888 } 1889 1890 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1891 { 1892 int err = -EINVAL, idx; 1893 1894 for (idx = 1; idx >= 0; --idx) { 1895 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1896 if (substream == NULL) 1897 continue; 1898 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1899 return err; 1900 } 1901 return err; 1902 } 1903 1904 static int snd_pcm_oss_nonblock(struct file * file) 1905 { 1906 spin_lock(&file->f_lock); 1907 file->f_flags |= O_NONBLOCK; 1908 spin_unlock(&file->f_lock); 1909 return 0; 1910 } 1911 1912 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1913 { 1914 1915 if (substream == NULL) { 1916 res &= ~DSP_CAP_DUPLEX; 1917 return res; 1918 } 1919 #ifdef DSP_CAP_MULTI 1920 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1921 if (substream->pstr->substream_count > 1) 1922 res |= DSP_CAP_MULTI; 1923 #endif 1924 /* DSP_CAP_REALTIME is set all times: */ 1925 /* all ALSA drivers can return actual pointer in ring buffer */ 1926 #if defined(DSP_CAP_REALTIME) && 0 1927 { 1928 struct snd_pcm_runtime *runtime = substream->runtime; 1929 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1930 res &= ~DSP_CAP_REALTIME; 1931 } 1932 #endif 1933 return res; 1934 } 1935 1936 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1937 { 1938 int result, idx; 1939 1940 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1941 for (idx = 0; idx < 2; idx++) { 1942 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1943 result = snd_pcm_oss_get_caps1(substream, result); 1944 } 1945 result |= 0x0001; /* revision - same as SB AWE 64 */ 1946 return result; 1947 } 1948 1949 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr) 1950 { 1951 struct snd_pcm_runtime *runtime = substream->runtime; 1952 snd_pcm_uframes_t appl_ptr; 1953 appl_ptr = hw_ptr + runtime->buffer_size; 1954 appl_ptr %= runtime->boundary; 1955 runtime->control->appl_ptr = appl_ptr; 1956 } 1957 1958 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1959 { 1960 struct snd_pcm_runtime *runtime; 1961 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1962 int err, cmd; 1963 1964 #ifdef OSS_DEBUG 1965 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger); 1966 #endif 1967 1968 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1969 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1970 1971 if (psubstream) { 1972 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1973 return err; 1974 } 1975 if (csubstream) { 1976 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1977 return err; 1978 } 1979 if (psubstream) { 1980 runtime = psubstream->runtime; 1981 if (trigger & PCM_ENABLE_OUTPUT) { 1982 if (runtime->oss.trigger) 1983 goto _skip1; 1984 if (atomic_read(&psubstream->mmap_count)) 1985 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); 1986 runtime->oss.trigger = 1; 1987 runtime->start_threshold = 1; 1988 cmd = SNDRV_PCM_IOCTL_START; 1989 } else { 1990 if (!runtime->oss.trigger) 1991 goto _skip1; 1992 runtime->oss.trigger = 0; 1993 runtime->start_threshold = runtime->boundary; 1994 cmd = SNDRV_PCM_IOCTL_DROP; 1995 runtime->oss.prepare = 1; 1996 } 1997 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 1998 if (err < 0) 1999 return err; 2000 } 2001 _skip1: 2002 if (csubstream) { 2003 runtime = csubstream->runtime; 2004 if (trigger & PCM_ENABLE_INPUT) { 2005 if (runtime->oss.trigger) 2006 goto _skip2; 2007 runtime->oss.trigger = 1; 2008 runtime->start_threshold = 1; 2009 cmd = SNDRV_PCM_IOCTL_START; 2010 } else { 2011 if (!runtime->oss.trigger) 2012 goto _skip2; 2013 runtime->oss.trigger = 0; 2014 runtime->start_threshold = runtime->boundary; 2015 cmd = SNDRV_PCM_IOCTL_DROP; 2016 runtime->oss.prepare = 1; 2017 } 2018 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2019 if (err < 0) 2020 return err; 2021 } 2022 _skip2: 2023 return 0; 2024 } 2025 2026 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2027 { 2028 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2029 int result = 0; 2030 2031 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2032 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2033 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2034 result |= PCM_ENABLE_OUTPUT; 2035 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2036 result |= PCM_ENABLE_INPUT; 2037 return result; 2038 } 2039 2040 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2041 { 2042 struct snd_pcm_substream *substream; 2043 struct snd_pcm_runtime *runtime; 2044 snd_pcm_sframes_t delay; 2045 int err; 2046 2047 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2048 if (substream == NULL) 2049 return -EINVAL; 2050 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2051 return err; 2052 runtime = substream->runtime; 2053 if (runtime->oss.params || runtime->oss.prepare) 2054 return 0; 2055 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2056 if (err == -EPIPE) 2057 delay = 0; /* hack for broken OSS applications */ 2058 else if (err < 0) 2059 return err; 2060 return snd_pcm_oss_bytes(substream, delay); 2061 } 2062 2063 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2064 { 2065 struct snd_pcm_substream *substream; 2066 struct snd_pcm_runtime *runtime; 2067 snd_pcm_sframes_t delay; 2068 int fixup; 2069 struct count_info info; 2070 int err; 2071 2072 if (_info == NULL) 2073 return -EFAULT; 2074 substream = pcm_oss_file->streams[stream]; 2075 if (substream == NULL) 2076 return -EINVAL; 2077 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2078 return err; 2079 runtime = substream->runtime; 2080 if (runtime->oss.params || runtime->oss.prepare) { 2081 memset(&info, 0, sizeof(info)); 2082 if (copy_to_user(_info, &info, sizeof(info))) 2083 return -EFAULT; 2084 return 0; 2085 } 2086 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2087 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2088 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2089 err = 0; 2090 delay = 0; 2091 fixup = 0; 2092 } else { 2093 fixup = runtime->oss.buffer_used; 2094 } 2095 } else { 2096 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2097 fixup = -runtime->oss.buffer_used; 2098 } 2099 if (err < 0) 2100 return err; 2101 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2102 if (atomic_read(&substream->mmap_count)) { 2103 snd_pcm_sframes_t n; 2104 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; 2105 if (n < 0) 2106 n += runtime->boundary; 2107 info.blocks = n / runtime->period_size; 2108 runtime->oss.prev_hw_ptr_interrupt = delay; 2109 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2110 snd_pcm_oss_simulate_fill(substream, delay); 2111 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2112 } else { 2113 delay = snd_pcm_oss_bytes(substream, delay); 2114 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2115 if (substream->oss.setup.buggyptr) 2116 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2117 else 2118 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2119 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2120 } else { 2121 delay += fixup; 2122 info.blocks = delay / runtime->oss.period_bytes; 2123 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2124 } 2125 } 2126 if (copy_to_user(_info, &info, sizeof(info))) 2127 return -EFAULT; 2128 return 0; 2129 } 2130 2131 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2132 { 2133 struct snd_pcm_substream *substream; 2134 struct snd_pcm_runtime *runtime; 2135 snd_pcm_sframes_t avail; 2136 int fixup; 2137 struct audio_buf_info info; 2138 int err; 2139 2140 if (_info == NULL) 2141 return -EFAULT; 2142 substream = pcm_oss_file->streams[stream]; 2143 if (substream == NULL) 2144 return -EINVAL; 2145 runtime = substream->runtime; 2146 2147 if (runtime->oss.params && 2148 (err = snd_pcm_oss_change_params(substream)) < 0) 2149 return err; 2150 2151 info.fragsize = runtime->oss.period_bytes; 2152 info.fragstotal = runtime->periods; 2153 if (runtime->oss.prepare) { 2154 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2155 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2156 info.fragments = runtime->oss.periods; 2157 } else { 2158 info.bytes = 0; 2159 info.fragments = 0; 2160 } 2161 } else { 2162 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2163 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2164 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2165 avail = runtime->buffer_size; 2166 err = 0; 2167 fixup = 0; 2168 } else { 2169 avail = runtime->buffer_size - avail; 2170 fixup = -runtime->oss.buffer_used; 2171 } 2172 } else { 2173 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2174 fixup = runtime->oss.buffer_used; 2175 } 2176 if (err < 0) 2177 return err; 2178 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2179 info.fragments = info.bytes / runtime->oss.period_bytes; 2180 } 2181 2182 #ifdef OSS_DEBUG 2183 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, " 2184 "fragstotal = %i, fragsize = %i\n", 2185 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2186 #endif 2187 if (copy_to_user(_info, &info, sizeof(info))) 2188 return -EFAULT; 2189 return 0; 2190 } 2191 2192 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2193 { 2194 // it won't be probably implemented 2195 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 2196 return -EINVAL; 2197 } 2198 2199 static const char *strip_task_path(const char *path) 2200 { 2201 const char *ptr, *ptrl = NULL; 2202 for (ptr = path; *ptr; ptr++) { 2203 if (*ptr == '/') 2204 ptrl = ptr + 1; 2205 } 2206 return ptrl; 2207 } 2208 2209 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2210 const char *task_name, 2211 struct snd_pcm_oss_setup *rsetup) 2212 { 2213 struct snd_pcm_oss_setup *setup; 2214 2215 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2216 do { 2217 for (setup = pcm->streams[stream].oss.setup_list; setup; 2218 setup = setup->next) { 2219 if (!strcmp(setup->task_name, task_name)) 2220 goto out; 2221 } 2222 } while ((task_name = strip_task_path(task_name)) != NULL); 2223 out: 2224 if (setup) 2225 *rsetup = *setup; 2226 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2227 } 2228 2229 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2230 { 2231 struct snd_pcm_runtime *runtime; 2232 runtime = substream->runtime; 2233 vfree(runtime->oss.buffer); 2234 runtime->oss.buffer = NULL; 2235 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2236 snd_pcm_oss_plugin_clear(substream); 2237 #endif 2238 substream->oss.oss = 0; 2239 } 2240 2241 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2242 struct snd_pcm_oss_setup *setup, 2243 int minor) 2244 { 2245 struct snd_pcm_runtime *runtime; 2246 2247 substream->oss.oss = 1; 2248 substream->oss.setup = *setup; 2249 if (setup->nonblock) 2250 substream->f_flags |= O_NONBLOCK; 2251 else if (setup->block) 2252 substream->f_flags &= ~O_NONBLOCK; 2253 runtime = substream->runtime; 2254 runtime->oss.params = 1; 2255 runtime->oss.trigger = 1; 2256 runtime->oss.rate = 8000; 2257 mutex_init(&runtime->oss.params_lock); 2258 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2259 case SNDRV_MINOR_OSS_PCM_8: 2260 runtime->oss.format = AFMT_U8; 2261 break; 2262 case SNDRV_MINOR_OSS_PCM_16: 2263 runtime->oss.format = AFMT_S16_LE; 2264 break; 2265 default: 2266 runtime->oss.format = AFMT_MU_LAW; 2267 } 2268 runtime->oss.channels = 1; 2269 runtime->oss.fragshift = 0; 2270 runtime->oss.maxfrags = 0; 2271 runtime->oss.subdivision = 0; 2272 substream->pcm_release = snd_pcm_oss_release_substream; 2273 } 2274 2275 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2276 { 2277 int cidx; 2278 if (!pcm_oss_file) 2279 return 0; 2280 for (cidx = 0; cidx < 2; ++cidx) { 2281 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2282 if (substream) 2283 snd_pcm_release_substream(substream); 2284 } 2285 kfree(pcm_oss_file); 2286 return 0; 2287 } 2288 2289 static int snd_pcm_oss_open_file(struct file *file, 2290 struct snd_pcm *pcm, 2291 struct snd_pcm_oss_file **rpcm_oss_file, 2292 int minor, 2293 struct snd_pcm_oss_setup *setup) 2294 { 2295 int idx, err; 2296 struct snd_pcm_oss_file *pcm_oss_file; 2297 struct snd_pcm_substream *substream; 2298 fmode_t f_mode = file->f_mode; 2299 2300 if (rpcm_oss_file) 2301 *rpcm_oss_file = NULL; 2302 2303 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2304 if (pcm_oss_file == NULL) 2305 return -ENOMEM; 2306 2307 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2308 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2309 f_mode = FMODE_WRITE; 2310 2311 file->f_flags &= ~O_APPEND; 2312 for (idx = 0; idx < 2; idx++) { 2313 if (setup[idx].disable) 2314 continue; 2315 if (! pcm->streams[idx].substream_count) 2316 continue; /* no matching substream */ 2317 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2318 if (! (f_mode & FMODE_WRITE)) 2319 continue; 2320 } else { 2321 if (! (f_mode & FMODE_READ)) 2322 continue; 2323 } 2324 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2325 if (err < 0) { 2326 snd_pcm_oss_release_file(pcm_oss_file); 2327 return err; 2328 } 2329 2330 pcm_oss_file->streams[idx] = substream; 2331 substream->file = pcm_oss_file; 2332 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2333 } 2334 2335 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2336 snd_pcm_oss_release_file(pcm_oss_file); 2337 return -EINVAL; 2338 } 2339 2340 file->private_data = pcm_oss_file; 2341 if (rpcm_oss_file) 2342 *rpcm_oss_file = pcm_oss_file; 2343 return 0; 2344 } 2345 2346 2347 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2348 { 2349 unsigned int idx; 2350 2351 if (snd_BUG_ON(!task || !name || size < 2)) 2352 return -EINVAL; 2353 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2354 name[idx] = task->comm[idx]; 2355 name[idx] = '\0'; 2356 return 0; 2357 } 2358 2359 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2360 { 2361 int err; 2362 char task_name[32]; 2363 struct snd_pcm *pcm; 2364 struct snd_pcm_oss_file *pcm_oss_file; 2365 struct snd_pcm_oss_setup setup[2]; 2366 int nonblock; 2367 wait_queue_t wait; 2368 2369 pcm = snd_lookup_oss_minor_data(iminor(inode), 2370 SNDRV_OSS_DEVICE_TYPE_PCM); 2371 if (pcm == NULL) { 2372 err = -ENODEV; 2373 goto __error1; 2374 } 2375 err = snd_card_file_add(pcm->card, file); 2376 if (err < 0) 2377 goto __error1; 2378 if (!try_module_get(pcm->card->module)) { 2379 err = -EFAULT; 2380 goto __error2; 2381 } 2382 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2383 err = -EFAULT; 2384 goto __error; 2385 } 2386 memset(setup, 0, sizeof(setup)); 2387 if (file->f_mode & FMODE_WRITE) 2388 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2389 task_name, &setup[0]); 2390 if (file->f_mode & FMODE_READ) 2391 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2392 task_name, &setup[1]); 2393 2394 nonblock = !!(file->f_flags & O_NONBLOCK); 2395 if (!nonblock) 2396 nonblock = nonblock_open; 2397 2398 init_waitqueue_entry(&wait, current); 2399 add_wait_queue(&pcm->open_wait, &wait); 2400 mutex_lock(&pcm->open_mutex); 2401 while (1) { 2402 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2403 iminor(inode), setup); 2404 if (err >= 0) 2405 break; 2406 if (err == -EAGAIN) { 2407 if (nonblock) { 2408 err = -EBUSY; 2409 break; 2410 } 2411 } else 2412 break; 2413 set_current_state(TASK_INTERRUPTIBLE); 2414 mutex_unlock(&pcm->open_mutex); 2415 schedule(); 2416 mutex_lock(&pcm->open_mutex); 2417 if (signal_pending(current)) { 2418 err = -ERESTARTSYS; 2419 break; 2420 } 2421 } 2422 remove_wait_queue(&pcm->open_wait, &wait); 2423 mutex_unlock(&pcm->open_mutex); 2424 if (err < 0) 2425 goto __error; 2426 return err; 2427 2428 __error: 2429 module_put(pcm->card->module); 2430 __error2: 2431 snd_card_file_remove(pcm->card, file); 2432 __error1: 2433 return err; 2434 } 2435 2436 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2437 { 2438 struct snd_pcm *pcm; 2439 struct snd_pcm_substream *substream; 2440 struct snd_pcm_oss_file *pcm_oss_file; 2441 2442 pcm_oss_file = file->private_data; 2443 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2444 if (substream == NULL) 2445 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2446 if (snd_BUG_ON(!substream)) 2447 return -ENXIO; 2448 pcm = substream->pcm; 2449 if (!pcm->card->shutdown) 2450 snd_pcm_oss_sync(pcm_oss_file); 2451 mutex_lock(&pcm->open_mutex); 2452 snd_pcm_oss_release_file(pcm_oss_file); 2453 mutex_unlock(&pcm->open_mutex); 2454 wake_up(&pcm->open_wait); 2455 module_put(pcm->card->module); 2456 snd_card_file_remove(pcm->card, file); 2457 return 0; 2458 } 2459 2460 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2461 { 2462 struct snd_pcm_oss_file *pcm_oss_file; 2463 int __user *p = (int __user *)arg; 2464 int res; 2465 2466 pcm_oss_file = file->private_data; 2467 if (cmd == OSS_GETVERSION) 2468 return put_user(SNDRV_OSS_VERSION, p); 2469 if (cmd == OSS_ALSAEMULVER) 2470 return put_user(1, p); 2471 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2472 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2473 struct snd_pcm_substream *substream; 2474 int idx; 2475 for (idx = 0; idx < 2; ++idx) { 2476 substream = pcm_oss_file->streams[idx]; 2477 if (substream != NULL) 2478 break; 2479 } 2480 if (snd_BUG_ON(idx >= 2)) 2481 return -ENXIO; 2482 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2483 } 2484 #endif 2485 if (((cmd >> 8) & 0xff) != 'P') 2486 return -EINVAL; 2487 #ifdef OSS_DEBUG 2488 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd); 2489 #endif 2490 switch (cmd) { 2491 case SNDCTL_DSP_RESET: 2492 return snd_pcm_oss_reset(pcm_oss_file); 2493 case SNDCTL_DSP_SYNC: 2494 return snd_pcm_oss_sync(pcm_oss_file); 2495 case SNDCTL_DSP_SPEED: 2496 if (get_user(res, p)) 2497 return -EFAULT; 2498 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2499 return res; 2500 return put_user(res, p); 2501 case SOUND_PCM_READ_RATE: 2502 res = snd_pcm_oss_get_rate(pcm_oss_file); 2503 if (res < 0) 2504 return res; 2505 return put_user(res, p); 2506 case SNDCTL_DSP_STEREO: 2507 if (get_user(res, p)) 2508 return -EFAULT; 2509 res = res > 0 ? 2 : 1; 2510 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2511 return res; 2512 return put_user(--res, p); 2513 case SNDCTL_DSP_GETBLKSIZE: 2514 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2515 if (res < 0) 2516 return res; 2517 return put_user(res, p); 2518 case SNDCTL_DSP_SETFMT: 2519 if (get_user(res, p)) 2520 return -EFAULT; 2521 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2522 if (res < 0) 2523 return res; 2524 return put_user(res, p); 2525 case SOUND_PCM_READ_BITS: 2526 res = snd_pcm_oss_get_format(pcm_oss_file); 2527 if (res < 0) 2528 return res; 2529 return put_user(res, p); 2530 case SNDCTL_DSP_CHANNELS: 2531 if (get_user(res, p)) 2532 return -EFAULT; 2533 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2534 if (res < 0) 2535 return res; 2536 return put_user(res, p); 2537 case SOUND_PCM_READ_CHANNELS: 2538 res = snd_pcm_oss_get_channels(pcm_oss_file); 2539 if (res < 0) 2540 return res; 2541 return put_user(res, p); 2542 case SOUND_PCM_WRITE_FILTER: 2543 case SOUND_PCM_READ_FILTER: 2544 return -EIO; 2545 case SNDCTL_DSP_POST: 2546 return snd_pcm_oss_post(pcm_oss_file); 2547 case SNDCTL_DSP_SUBDIVIDE: 2548 if (get_user(res, p)) 2549 return -EFAULT; 2550 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2551 if (res < 0) 2552 return res; 2553 return put_user(res, p); 2554 case SNDCTL_DSP_SETFRAGMENT: 2555 if (get_user(res, p)) 2556 return -EFAULT; 2557 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2558 case SNDCTL_DSP_GETFMTS: 2559 res = snd_pcm_oss_get_formats(pcm_oss_file); 2560 if (res < 0) 2561 return res; 2562 return put_user(res, p); 2563 case SNDCTL_DSP_GETOSPACE: 2564 case SNDCTL_DSP_GETISPACE: 2565 return snd_pcm_oss_get_space(pcm_oss_file, 2566 cmd == SNDCTL_DSP_GETISPACE ? 2567 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2568 (struct audio_buf_info __user *) arg); 2569 case SNDCTL_DSP_NONBLOCK: 2570 return snd_pcm_oss_nonblock(file); 2571 case SNDCTL_DSP_GETCAPS: 2572 res = snd_pcm_oss_get_caps(pcm_oss_file); 2573 if (res < 0) 2574 return res; 2575 return put_user(res, p); 2576 case SNDCTL_DSP_GETTRIGGER: 2577 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2578 if (res < 0) 2579 return res; 2580 return put_user(res, p); 2581 case SNDCTL_DSP_SETTRIGGER: 2582 if (get_user(res, p)) 2583 return -EFAULT; 2584 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2585 case SNDCTL_DSP_GETIPTR: 2586 case SNDCTL_DSP_GETOPTR: 2587 return snd_pcm_oss_get_ptr(pcm_oss_file, 2588 cmd == SNDCTL_DSP_GETIPTR ? 2589 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2590 (struct count_info __user *) arg); 2591 case SNDCTL_DSP_MAPINBUF: 2592 case SNDCTL_DSP_MAPOUTBUF: 2593 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2594 cmd == SNDCTL_DSP_MAPINBUF ? 2595 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2596 (struct buffmem_desc __user *) arg); 2597 case SNDCTL_DSP_SETSYNCRO: 2598 /* stop DMA now.. */ 2599 return 0; 2600 case SNDCTL_DSP_SETDUPLEX: 2601 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2602 return 0; 2603 return -EIO; 2604 case SNDCTL_DSP_GETODELAY: 2605 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2606 if (res < 0) { 2607 /* it's for sure, some broken apps don't check for error codes */ 2608 put_user(0, p); 2609 return res; 2610 } 2611 return put_user(res, p); 2612 case SNDCTL_DSP_PROFILE: 2613 return 0; /* silently ignore */ 2614 default: 2615 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2616 } 2617 return -EINVAL; 2618 } 2619 2620 #ifdef CONFIG_COMPAT 2621 /* all compatible */ 2622 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2623 #else 2624 #define snd_pcm_oss_ioctl_compat NULL 2625 #endif 2626 2627 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2628 { 2629 struct snd_pcm_oss_file *pcm_oss_file; 2630 struct snd_pcm_substream *substream; 2631 2632 pcm_oss_file = file->private_data; 2633 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2634 if (substream == NULL) 2635 return -ENXIO; 2636 substream->f_flags = file->f_flags & O_NONBLOCK; 2637 #ifndef OSS_DEBUG 2638 return snd_pcm_oss_read1(substream, buf, count); 2639 #else 2640 { 2641 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2642 printk(KERN_DEBUG "pcm_oss: read %li bytes " 2643 "(returned %li bytes)\n", (long)count, (long)res); 2644 return res; 2645 } 2646 #endif 2647 } 2648 2649 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2650 { 2651 struct snd_pcm_oss_file *pcm_oss_file; 2652 struct snd_pcm_substream *substream; 2653 long result; 2654 2655 pcm_oss_file = file->private_data; 2656 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2657 if (substream == NULL) 2658 return -ENXIO; 2659 substream->f_flags = file->f_flags & O_NONBLOCK; 2660 result = snd_pcm_oss_write1(substream, buf, count); 2661 #ifdef OSS_DEBUG 2662 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n", 2663 (long)count, (long)result); 2664 #endif 2665 return result; 2666 } 2667 2668 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2669 { 2670 struct snd_pcm_runtime *runtime = substream->runtime; 2671 if (atomic_read(&substream->mmap_count)) 2672 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2673 else 2674 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; 2675 } 2676 2677 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2678 { 2679 struct snd_pcm_runtime *runtime = substream->runtime; 2680 if (atomic_read(&substream->mmap_count)) 2681 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2682 else 2683 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; 2684 } 2685 2686 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2687 { 2688 struct snd_pcm_oss_file *pcm_oss_file; 2689 unsigned int mask; 2690 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2691 2692 pcm_oss_file = file->private_data; 2693 2694 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2695 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2696 2697 mask = 0; 2698 if (psubstream != NULL) { 2699 struct snd_pcm_runtime *runtime = psubstream->runtime; 2700 poll_wait(file, &runtime->sleep, wait); 2701 snd_pcm_stream_lock_irq(psubstream); 2702 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2703 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2704 snd_pcm_oss_playback_ready(psubstream))) 2705 mask |= POLLOUT | POLLWRNORM; 2706 snd_pcm_stream_unlock_irq(psubstream); 2707 } 2708 if (csubstream != NULL) { 2709 struct snd_pcm_runtime *runtime = csubstream->runtime; 2710 snd_pcm_state_t ostate; 2711 poll_wait(file, &runtime->sleep, wait); 2712 snd_pcm_stream_lock_irq(csubstream); 2713 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2714 snd_pcm_oss_capture_ready(csubstream)) 2715 mask |= POLLIN | POLLRDNORM; 2716 snd_pcm_stream_unlock_irq(csubstream); 2717 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2718 struct snd_pcm_oss_file ofile; 2719 memset(&ofile, 0, sizeof(ofile)); 2720 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2721 runtime->oss.trigger = 0; 2722 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2723 } 2724 } 2725 2726 return mask; 2727 } 2728 2729 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2730 { 2731 struct snd_pcm_oss_file *pcm_oss_file; 2732 struct snd_pcm_substream *substream = NULL; 2733 struct snd_pcm_runtime *runtime; 2734 int err; 2735 2736 #ifdef OSS_DEBUG 2737 printk(KERN_DEBUG "pcm_oss: mmap begin\n"); 2738 #endif 2739 pcm_oss_file = file->private_data; 2740 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2741 case VM_READ | VM_WRITE: 2742 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2743 if (substream) 2744 break; 2745 /* Fall through */ 2746 case VM_READ: 2747 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2748 break; 2749 case VM_WRITE: 2750 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2751 break; 2752 default: 2753 return -EINVAL; 2754 } 2755 /* set VM_READ access as well to fix memset() routines that do 2756 reads before writes (to improve performance) */ 2757 area->vm_flags |= VM_READ; 2758 if (substream == NULL) 2759 return -ENXIO; 2760 runtime = substream->runtime; 2761 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2762 return -EIO; 2763 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2764 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2765 else 2766 return -EIO; 2767 2768 if (runtime->oss.params) { 2769 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2770 return err; 2771 } 2772 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2773 if (runtime->oss.plugin_first != NULL) 2774 return -EIO; 2775 #endif 2776 2777 if (area->vm_pgoff != 0) 2778 return -EINVAL; 2779 2780 err = snd_pcm_mmap_data(substream, file, area); 2781 if (err < 0) 2782 return err; 2783 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2784 runtime->silence_threshold = 0; 2785 runtime->silence_size = 0; 2786 #ifdef OSS_DEBUG 2787 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n", 2788 runtime->oss.mmap_bytes); 2789 #endif 2790 /* In mmap mode we never stop */ 2791 runtime->stop_threshold = runtime->boundary; 2792 2793 return 0; 2794 } 2795 2796 #ifdef CONFIG_SND_VERBOSE_PROCFS 2797 /* 2798 * /proc interface 2799 */ 2800 2801 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2802 struct snd_info_buffer *buffer) 2803 { 2804 struct snd_pcm_str *pstr = entry->private_data; 2805 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2806 mutex_lock(&pstr->oss.setup_mutex); 2807 while (setup) { 2808 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2809 setup->task_name, 2810 setup->periods, 2811 setup->period_size, 2812 setup->disable ? " disable" : "", 2813 setup->direct ? " direct" : "", 2814 setup->block ? " block" : "", 2815 setup->nonblock ? " non-block" : "", 2816 setup->partialfrag ? " partial-frag" : "", 2817 setup->nosilence ? " no-silence" : ""); 2818 setup = setup->next; 2819 } 2820 mutex_unlock(&pstr->oss.setup_mutex); 2821 } 2822 2823 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2824 { 2825 struct snd_pcm_oss_setup *setup, *setupn; 2826 2827 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2828 setup; setup = setupn) { 2829 setupn = setup->next; 2830 kfree(setup->task_name); 2831 kfree(setup); 2832 } 2833 pstr->oss.setup_list = NULL; 2834 } 2835 2836 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2837 struct snd_info_buffer *buffer) 2838 { 2839 struct snd_pcm_str *pstr = entry->private_data; 2840 char line[128], str[32], task_name[32], *ptr; 2841 int idx1; 2842 struct snd_pcm_oss_setup *setup, *setup1, template; 2843 2844 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2845 mutex_lock(&pstr->oss.setup_mutex); 2846 memset(&template, 0, sizeof(template)); 2847 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2848 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2849 snd_pcm_oss_proc_free_setup_list(pstr); 2850 mutex_unlock(&pstr->oss.setup_mutex); 2851 continue; 2852 } 2853 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2854 if (!strcmp(setup->task_name, task_name)) { 2855 template = *setup; 2856 break; 2857 } 2858 } 2859 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2860 template.periods = simple_strtoul(str, NULL, 10); 2861 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2862 template.period_size = simple_strtoul(str, NULL, 10); 2863 for (idx1 = 31; idx1 >= 0; idx1--) 2864 if (template.period_size & (1 << idx1)) 2865 break; 2866 for (idx1--; idx1 >= 0; idx1--) 2867 template.period_size &= ~(1 << idx1); 2868 do { 2869 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2870 if (!strcmp(str, "disable")) { 2871 template.disable = 1; 2872 } else if (!strcmp(str, "direct")) { 2873 template.direct = 1; 2874 } else if (!strcmp(str, "block")) { 2875 template.block = 1; 2876 } else if (!strcmp(str, "non-block")) { 2877 template.nonblock = 1; 2878 } else if (!strcmp(str, "partial-frag")) { 2879 template.partialfrag = 1; 2880 } else if (!strcmp(str, "no-silence")) { 2881 template.nosilence = 1; 2882 } else if (!strcmp(str, "buggy-ptr")) { 2883 template.buggyptr = 1; 2884 } 2885 } while (*str); 2886 if (setup == NULL) { 2887 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2888 if (! setup) { 2889 buffer->error = -ENOMEM; 2890 mutex_unlock(&pstr->oss.setup_mutex); 2891 return; 2892 } 2893 if (pstr->oss.setup_list == NULL) 2894 pstr->oss.setup_list = setup; 2895 else { 2896 for (setup1 = pstr->oss.setup_list; 2897 setup1->next; setup1 = setup1->next); 2898 setup1->next = setup; 2899 } 2900 template.task_name = kstrdup(task_name, GFP_KERNEL); 2901 if (! template.task_name) { 2902 kfree(setup); 2903 buffer->error = -ENOMEM; 2904 mutex_unlock(&pstr->oss.setup_mutex); 2905 return; 2906 } 2907 } 2908 *setup = template; 2909 mutex_unlock(&pstr->oss.setup_mutex); 2910 } 2911 } 2912 2913 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2914 { 2915 int stream; 2916 for (stream = 0; stream < 2; ++stream) { 2917 struct snd_info_entry *entry; 2918 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2919 if (pstr->substream_count == 0) 2920 continue; 2921 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2922 entry->content = SNDRV_INFO_CONTENT_TEXT; 2923 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2924 entry->c.text.read = snd_pcm_oss_proc_read; 2925 entry->c.text.write = snd_pcm_oss_proc_write; 2926 entry->private_data = pstr; 2927 if (snd_info_register(entry) < 0) { 2928 snd_info_free_entry(entry); 2929 entry = NULL; 2930 } 2931 } 2932 pstr->oss.proc_entry = entry; 2933 } 2934 } 2935 2936 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2937 { 2938 int stream; 2939 for (stream = 0; stream < 2; ++stream) { 2940 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2941 snd_info_free_entry(pstr->oss.proc_entry); 2942 pstr->oss.proc_entry = NULL; 2943 snd_pcm_oss_proc_free_setup_list(pstr); 2944 } 2945 } 2946 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2947 #define snd_pcm_oss_proc_init(pcm) 2948 #define snd_pcm_oss_proc_done(pcm) 2949 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2950 2951 /* 2952 * ENTRY functions 2953 */ 2954 2955 static const struct file_operations snd_pcm_oss_f_reg = 2956 { 2957 .owner = THIS_MODULE, 2958 .read = snd_pcm_oss_read, 2959 .write = snd_pcm_oss_write, 2960 .open = snd_pcm_oss_open, 2961 .release = snd_pcm_oss_release, 2962 .poll = snd_pcm_oss_poll, 2963 .unlocked_ioctl = snd_pcm_oss_ioctl, 2964 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2965 .mmap = snd_pcm_oss_mmap, 2966 }; 2967 2968 static void register_oss_dsp(struct snd_pcm *pcm, int index) 2969 { 2970 char name[128]; 2971 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2972 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2973 pcm->card, index, &snd_pcm_oss_f_reg, 2974 pcm, name) < 0) { 2975 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 2976 pcm->card->number, pcm->device); 2977 } 2978 } 2979 2980 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 2981 { 2982 pcm->oss.reg = 0; 2983 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2984 char name[128]; 2985 int duplex; 2986 register_oss_dsp(pcm, 0); 2987 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2988 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2989 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2990 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2991 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2992 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2993 pcm->card->number, 2994 name); 2995 #endif 2996 pcm->oss.reg++; 2997 pcm->oss.reg_mask |= 1; 2998 } 2999 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3000 register_oss_dsp(pcm, 1); 3001 pcm->oss.reg++; 3002 pcm->oss.reg_mask |= 2; 3003 } 3004 3005 if (pcm->oss.reg) 3006 snd_pcm_oss_proc_init(pcm); 3007 3008 return 0; 3009 } 3010 3011 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3012 { 3013 if (pcm->oss.reg) { 3014 if (pcm->oss.reg_mask & 1) { 3015 pcm->oss.reg_mask &= ~1; 3016 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3017 pcm->card, 0); 3018 } 3019 if (pcm->oss.reg_mask & 2) { 3020 pcm->oss.reg_mask &= ~2; 3021 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3022 pcm->card, 1); 3023 } 3024 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3025 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3026 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3027 #endif 3028 } 3029 pcm->oss.reg = 0; 3030 } 3031 return 0; 3032 } 3033 3034 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3035 { 3036 snd_pcm_oss_disconnect_minor(pcm); 3037 snd_pcm_oss_proc_done(pcm); 3038 return 0; 3039 } 3040 3041 static struct snd_pcm_notify snd_pcm_oss_notify = 3042 { 3043 .n_register = snd_pcm_oss_register_minor, 3044 .n_disconnect = snd_pcm_oss_disconnect_minor, 3045 .n_unregister = snd_pcm_oss_unregister_minor, 3046 }; 3047 3048 static int __init alsa_pcm_oss_init(void) 3049 { 3050 int i; 3051 int err; 3052 3053 /* check device map table */ 3054 for (i = 0; i < SNDRV_CARDS; i++) { 3055 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3056 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 3057 i, dsp_map[i]); 3058 dsp_map[i] = 0; 3059 } 3060 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3061 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 3062 i, adsp_map[i]); 3063 adsp_map[i] = 1; 3064 } 3065 } 3066 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3067 return err; 3068 return 0; 3069 } 3070 3071 static void __exit alsa_pcm_oss_exit(void) 3072 { 3073 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3074 } 3075 3076 module_init(alsa_pcm_oss_init) 3077 module_exit(alsa_pcm_oss_exit) 3078