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/math64.h> 35 #include <linux/string.h> 36 #include <sound/core.h> 37 #include <sound/minors.h> 38 #include <sound/pcm.h> 39 #include <sound/pcm_params.h> 40 #include "pcm_plugin.h" 41 #include <sound/info.h> 42 #include <linux/soundcard.h> 43 #include <sound/initval.h> 44 45 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 46 47 static int dsp_map[SNDRV_CARDS]; 48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 49 static int nonblock_open = 1; 50 51 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 53 MODULE_LICENSE("GPL"); 54 module_param_array(dsp_map, int, NULL, 0444); 55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 56 module_param_array(adsp_map, int, NULL, 0444); 57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 58 module_param(nonblock_open, bool, 0644); 59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 62 63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg); 64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 67 68 static inline mm_segment_t snd_enter_user(void) 69 { 70 mm_segment_t fs = get_fs(); 71 set_fs(get_ds()); 72 return fs; 73 } 74 75 static inline void snd_leave_user(mm_segment_t fs) 76 { 77 set_fs(fs); 78 } 79 80 /* 81 * helper functions to process hw_params 82 */ 83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 84 { 85 int changed = 0; 86 if (i->min < min) { 87 i->min = min; 88 i->openmin = openmin; 89 changed = 1; 90 } else if (i->min == min && !i->openmin && openmin) { 91 i->openmin = 1; 92 changed = 1; 93 } 94 if (i->integer) { 95 if (i->openmin) { 96 i->min++; 97 i->openmin = 0; 98 } 99 } 100 if (snd_interval_checkempty(i)) { 101 snd_interval_none(i); 102 return -EINVAL; 103 } 104 return changed; 105 } 106 107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 108 { 109 int changed = 0; 110 if (i->max > max) { 111 i->max = max; 112 i->openmax = openmax; 113 changed = 1; 114 } else if (i->max == max && !i->openmax && openmax) { 115 i->openmax = 1; 116 changed = 1; 117 } 118 if (i->integer) { 119 if (i->openmax) { 120 i->max--; 121 i->openmax = 0; 122 } 123 } 124 if (snd_interval_checkempty(i)) { 125 snd_interval_none(i); 126 return -EINVAL; 127 } 128 return changed; 129 } 130 131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 132 { 133 struct snd_interval t; 134 t.empty = 0; 135 t.min = t.max = val; 136 t.openmin = t.openmax = 0; 137 t.integer = 1; 138 return snd_interval_refine(i, &t); 139 } 140 141 /** 142 * snd_pcm_hw_param_value_min 143 * @params: the hw_params instance 144 * @var: parameter to retrieve 145 * @dir: pointer to the direction (-1,0,1) or NULL 146 * 147 * Return the minimum value for field PAR. 148 */ 149 static unsigned int 150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 151 snd_pcm_hw_param_t var, int *dir) 152 { 153 if (hw_is_mask(var)) { 154 if (dir) 155 *dir = 0; 156 return snd_mask_min(hw_param_mask_c(params, var)); 157 } 158 if (hw_is_interval(var)) { 159 const struct snd_interval *i = hw_param_interval_c(params, var); 160 if (dir) 161 *dir = i->openmin; 162 return snd_interval_min(i); 163 } 164 return -EINVAL; 165 } 166 167 /** 168 * snd_pcm_hw_param_value_max 169 * @params: the hw_params instance 170 * @var: parameter to retrieve 171 * @dir: pointer to the direction (-1,0,1) or NULL 172 * 173 * Return the maximum value for field PAR. 174 */ 175 static unsigned int 176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 177 snd_pcm_hw_param_t var, int *dir) 178 { 179 if (hw_is_mask(var)) { 180 if (dir) 181 *dir = 0; 182 return snd_mask_max(hw_param_mask_c(params, var)); 183 } 184 if (hw_is_interval(var)) { 185 const struct snd_interval *i = hw_param_interval_c(params, var); 186 if (dir) 187 *dir = - (int) i->openmax; 188 return snd_interval_max(i); 189 } 190 return -EINVAL; 191 } 192 193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 194 snd_pcm_hw_param_t var, 195 const struct snd_mask *val) 196 { 197 int changed; 198 changed = snd_mask_refine(hw_param_mask(params, var), val); 199 if (changed) { 200 params->cmask |= 1 << var; 201 params->rmask |= 1 << var; 202 } 203 return changed; 204 } 205 206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 207 struct snd_pcm_hw_params *params, 208 snd_pcm_hw_param_t var, 209 const struct snd_mask *val) 210 { 211 int changed = _snd_pcm_hw_param_mask(params, var, val); 212 if (changed < 0) 213 return changed; 214 if (params->rmask) { 215 int err = snd_pcm_hw_refine(pcm, params); 216 if (err < 0) 217 return err; 218 } 219 return 0; 220 } 221 222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 223 snd_pcm_hw_param_t var, unsigned int val, 224 int dir) 225 { 226 int changed; 227 int open = 0; 228 if (dir) { 229 if (dir > 0) { 230 open = 1; 231 } else if (dir < 0) { 232 if (val > 0) { 233 open = 1; 234 val--; 235 } 236 } 237 } 238 if (hw_is_mask(var)) 239 changed = snd_mask_refine_min(hw_param_mask(params, var), 240 val + !!open); 241 else if (hw_is_interval(var)) 242 changed = snd_interval_refine_min(hw_param_interval(params, var), 243 val, open); 244 else 245 return -EINVAL; 246 if (changed) { 247 params->cmask |= 1 << var; 248 params->rmask |= 1 << var; 249 } 250 return changed; 251 } 252 253 /** 254 * snd_pcm_hw_param_min 255 * @pcm: PCM instance 256 * @params: the hw_params instance 257 * @var: parameter to retrieve 258 * @val: minimal value 259 * @dir: pointer to the direction (-1,0,1) or NULL 260 * 261 * Inside configuration space defined by PARAMS remove from PAR all 262 * values < VAL. Reduce configuration space accordingly. 263 * Return new minimum or -EINVAL if the configuration space is empty 264 */ 265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 266 struct snd_pcm_hw_params *params, 267 snd_pcm_hw_param_t var, unsigned int val, 268 int *dir) 269 { 270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 271 if (changed < 0) 272 return changed; 273 if (params->rmask) { 274 int err = snd_pcm_hw_refine(pcm, params); 275 if (err < 0) 276 return err; 277 } 278 return snd_pcm_hw_param_value_min(params, var, dir); 279 } 280 281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 282 snd_pcm_hw_param_t var, unsigned int val, 283 int dir) 284 { 285 int changed; 286 int open = 0; 287 if (dir) { 288 if (dir < 0) { 289 open = 1; 290 } else if (dir > 0) { 291 open = 1; 292 val++; 293 } 294 } 295 if (hw_is_mask(var)) { 296 if (val == 0 && open) { 297 snd_mask_none(hw_param_mask(params, var)); 298 changed = -EINVAL; 299 } else 300 changed = snd_mask_refine_max(hw_param_mask(params, var), 301 val - !!open); 302 } else if (hw_is_interval(var)) 303 changed = snd_interval_refine_max(hw_param_interval(params, var), 304 val, open); 305 else 306 return -EINVAL; 307 if (changed) { 308 params->cmask |= 1 << var; 309 params->rmask |= 1 << var; 310 } 311 return changed; 312 } 313 314 /** 315 * snd_pcm_hw_param_max 316 * @pcm: PCM instance 317 * @params: the hw_params instance 318 * @var: parameter to retrieve 319 * @val: maximal value 320 * @dir: pointer to the direction (-1,0,1) or NULL 321 * 322 * Inside configuration space defined by PARAMS remove from PAR all 323 * values >= VAL + 1. Reduce configuration space accordingly. 324 * Return new maximum or -EINVAL if the configuration space is empty 325 */ 326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 327 struct snd_pcm_hw_params *params, 328 snd_pcm_hw_param_t var, unsigned int val, 329 int *dir) 330 { 331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 332 if (changed < 0) 333 return changed; 334 if (params->rmask) { 335 int err = snd_pcm_hw_refine(pcm, params); 336 if (err < 0) 337 return err; 338 } 339 return snd_pcm_hw_param_value_max(params, var, dir); 340 } 341 342 static int boundary_sub(int a, int adir, 343 int b, int bdir, 344 int *c, int *cdir) 345 { 346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 348 *c = a - b; 349 *cdir = adir - bdir; 350 if (*cdir == -2) { 351 (*c)--; 352 } else if (*cdir == 2) { 353 (*c)++; 354 } 355 return 0; 356 } 357 358 static int boundary_lt(unsigned int a, int adir, 359 unsigned int b, int bdir) 360 { 361 if (adir < 0) { 362 a--; 363 adir = 1; 364 } else if (adir > 0) 365 adir = 1; 366 if (bdir < 0) { 367 b--; 368 bdir = 1; 369 } else if (bdir > 0) 370 bdir = 1; 371 return a < b || (a == b && adir < bdir); 372 } 373 374 /* Return 1 if min is nearer to best than max */ 375 static int boundary_nearer(int min, int mindir, 376 int best, int bestdir, 377 int max, int maxdir) 378 { 379 int dmin, dmindir; 380 int dmax, dmaxdir; 381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 383 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 384 } 385 386 /** 387 * snd_pcm_hw_param_near 388 * @pcm: PCM instance 389 * @params: the hw_params instance 390 * @var: parameter to retrieve 391 * @best: value to set 392 * @dir: pointer to the direction (-1,0,1) or NULL 393 * 394 * Inside configuration space defined by PARAMS set PAR to the available value 395 * nearest to VAL. Reduce configuration space accordingly. 396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 398 * Return the value found. 399 */ 400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 401 struct snd_pcm_hw_params *params, 402 snd_pcm_hw_param_t var, unsigned int best, 403 int *dir) 404 { 405 struct snd_pcm_hw_params *save = NULL; 406 int v; 407 unsigned int saved_min; 408 int last = 0; 409 int min, max; 410 int mindir, maxdir; 411 int valdir = dir ? *dir : 0; 412 /* FIXME */ 413 if (best > INT_MAX) 414 best = INT_MAX; 415 min = max = best; 416 mindir = maxdir = valdir; 417 if (maxdir > 0) 418 maxdir = 0; 419 else if (maxdir == 0) 420 maxdir = -1; 421 else { 422 maxdir = 1; 423 max--; 424 } 425 save = kmalloc(sizeof(*save), GFP_KERNEL); 426 if (save == NULL) 427 return -ENOMEM; 428 *save = *params; 429 saved_min = min; 430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 431 if (min >= 0) { 432 struct snd_pcm_hw_params *params1; 433 if (max < 0) 434 goto _end; 435 if ((unsigned int)min == saved_min && mindir == valdir) 436 goto _end; 437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 438 if (params1 == NULL) { 439 kfree(save); 440 return -ENOMEM; 441 } 442 *params1 = *save; 443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 444 if (max < 0) { 445 kfree(params1); 446 goto _end; 447 } 448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 449 *params = *params1; 450 last = 1; 451 } 452 kfree(params1); 453 } else { 454 *params = *save; 455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 456 if (max < 0) 457 return max; 458 last = 1; 459 } 460 _end: 461 kfree(save); 462 if (last) 463 v = snd_pcm_hw_param_last(pcm, params, var, dir); 464 else 465 v = snd_pcm_hw_param_first(pcm, params, var, dir); 466 snd_BUG_ON(v < 0); 467 return v; 468 } 469 470 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 471 snd_pcm_hw_param_t var, unsigned int val, 472 int dir) 473 { 474 int changed; 475 if (hw_is_mask(var)) { 476 struct snd_mask *m = hw_param_mask(params, var); 477 if (val == 0 && dir < 0) { 478 changed = -EINVAL; 479 snd_mask_none(m); 480 } else { 481 if (dir > 0) 482 val++; 483 else if (dir < 0) 484 val--; 485 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 486 } 487 } else if (hw_is_interval(var)) { 488 struct snd_interval *i = hw_param_interval(params, var); 489 if (val == 0 && dir < 0) { 490 changed = -EINVAL; 491 snd_interval_none(i); 492 } else if (dir == 0) 493 changed = snd_interval_refine_set(i, val); 494 else { 495 struct snd_interval t; 496 t.openmin = 1; 497 t.openmax = 1; 498 t.empty = 0; 499 t.integer = 0; 500 if (dir < 0) { 501 t.min = val - 1; 502 t.max = val; 503 } else { 504 t.min = val; 505 t.max = val+1; 506 } 507 changed = snd_interval_refine(i, &t); 508 } 509 } else 510 return -EINVAL; 511 if (changed) { 512 params->cmask |= 1 << var; 513 params->rmask |= 1 << var; 514 } 515 return changed; 516 } 517 518 /** 519 * snd_pcm_hw_param_set 520 * @pcm: PCM instance 521 * @params: the hw_params instance 522 * @var: parameter to retrieve 523 * @val: value to set 524 * @dir: pointer to the direction (-1,0,1) or NULL 525 * 526 * Inside configuration space defined by PARAMS remove from PAR all 527 * values != VAL. Reduce configuration space accordingly. 528 * Return VAL or -EINVAL if the configuration space is empty 529 */ 530 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 531 struct snd_pcm_hw_params *params, 532 snd_pcm_hw_param_t var, unsigned int val, 533 int dir) 534 { 535 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 536 if (changed < 0) 537 return changed; 538 if (params->rmask) { 539 int err = snd_pcm_hw_refine(pcm, params); 540 if (err < 0) 541 return err; 542 } 543 return snd_pcm_hw_param_value(params, var, NULL); 544 } 545 546 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 547 snd_pcm_hw_param_t var) 548 { 549 int changed; 550 changed = snd_interval_setinteger(hw_param_interval(params, var)); 551 if (changed) { 552 params->cmask |= 1 << var; 553 params->rmask |= 1 << var; 554 } 555 return changed; 556 } 557 558 /* 559 * plugin 560 */ 561 562 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 563 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 564 { 565 struct snd_pcm_runtime *runtime = substream->runtime; 566 struct snd_pcm_plugin *plugin, *next; 567 568 plugin = runtime->oss.plugin_first; 569 while (plugin) { 570 next = plugin->next; 571 snd_pcm_plugin_free(plugin); 572 plugin = next; 573 } 574 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 575 return 0; 576 } 577 578 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 579 { 580 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 581 plugin->next = runtime->oss.plugin_first; 582 plugin->prev = NULL; 583 if (runtime->oss.plugin_first) { 584 runtime->oss.plugin_first->prev = plugin; 585 runtime->oss.plugin_first = plugin; 586 } else { 587 runtime->oss.plugin_last = 588 runtime->oss.plugin_first = plugin; 589 } 590 return 0; 591 } 592 593 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 594 { 595 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 596 plugin->next = NULL; 597 plugin->prev = runtime->oss.plugin_last; 598 if (runtime->oss.plugin_last) { 599 runtime->oss.plugin_last->next = plugin; 600 runtime->oss.plugin_last = plugin; 601 } else { 602 runtime->oss.plugin_last = 603 runtime->oss.plugin_first = plugin; 604 } 605 return 0; 606 } 607 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 608 609 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 610 { 611 struct snd_pcm_runtime *runtime = substream->runtime; 612 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 613 long bytes = frames_to_bytes(runtime, frames); 614 if (buffer_size == runtime->oss.buffer_bytes) 615 return bytes; 616 #if BITS_PER_LONG >= 64 617 return runtime->oss.buffer_bytes * bytes / buffer_size; 618 #else 619 { 620 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 621 return div_u64(bsize, buffer_size); 622 } 623 #endif 624 } 625 626 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 627 { 628 struct snd_pcm_runtime *runtime = substream->runtime; 629 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 630 if (buffer_size == runtime->oss.buffer_bytes) 631 return bytes_to_frames(runtime, bytes); 632 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 633 } 634 635 static inline 636 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 637 { 638 return runtime->hw_ptr_interrupt; 639 } 640 641 /* define extended formats in the recent OSS versions (if any) */ 642 /* linear formats */ 643 #define AFMT_S32_LE 0x00001000 644 #define AFMT_S32_BE 0x00002000 645 #define AFMT_S24_LE 0x00008000 646 #define AFMT_S24_BE 0x00010000 647 #define AFMT_S24_PACKED 0x00040000 648 649 /* other supported formats */ 650 #define AFMT_FLOAT 0x00004000 651 #define AFMT_SPDIF_RAW 0x00020000 652 653 /* unsupported formats */ 654 #define AFMT_AC3 0x00000400 655 #define AFMT_VORBIS 0x00000800 656 657 static int snd_pcm_oss_format_from(int format) 658 { 659 switch (format) { 660 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 661 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 662 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 663 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 664 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 665 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 666 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 667 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 668 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 669 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 670 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 671 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 672 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 673 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 674 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 675 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 676 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 677 default: return SNDRV_PCM_FORMAT_U8; 678 } 679 } 680 681 static int snd_pcm_oss_format_to(int format) 682 { 683 switch (format) { 684 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 685 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 686 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 687 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 688 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 689 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 690 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 691 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 692 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 693 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 694 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 695 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 696 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 697 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 698 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 699 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 700 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 701 default: return -EINVAL; 702 } 703 } 704 705 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 706 struct snd_pcm_hw_params *oss_params, 707 struct snd_pcm_hw_params *slave_params) 708 { 709 size_t s; 710 size_t oss_buffer_size, oss_period_size, oss_periods; 711 size_t min_period_size, max_period_size; 712 struct snd_pcm_runtime *runtime = substream->runtime; 713 size_t oss_frame_size; 714 715 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 716 params_channels(oss_params) / 8; 717 718 oss_buffer_size = snd_pcm_plug_client_size(substream, 719 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 720 oss_buffer_size = 1 << ld2(oss_buffer_size); 721 if (atomic_read(&substream->mmap_count)) { 722 if (oss_buffer_size > runtime->oss.mmap_bytes) 723 oss_buffer_size = runtime->oss.mmap_bytes; 724 } 725 726 if (substream->oss.setup.period_size > 16) 727 oss_period_size = substream->oss.setup.period_size; 728 else if (runtime->oss.fragshift) { 729 oss_period_size = 1 << runtime->oss.fragshift; 730 if (oss_period_size > oss_buffer_size / 2) 731 oss_period_size = oss_buffer_size / 2; 732 } else { 733 int sd; 734 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 735 736 oss_period_size = oss_buffer_size; 737 do { 738 oss_period_size /= 2; 739 } while (oss_period_size > bytes_per_sec); 740 if (runtime->oss.subdivision == 0) { 741 sd = 4; 742 if (oss_period_size / sd > 4096) 743 sd *= 2; 744 if (oss_period_size / sd < 4096) 745 sd = 1; 746 } else 747 sd = runtime->oss.subdivision; 748 oss_period_size /= sd; 749 if (oss_period_size < 16) 750 oss_period_size = 16; 751 } 752 753 min_period_size = snd_pcm_plug_client_size(substream, 754 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 755 min_period_size *= oss_frame_size; 756 min_period_size = 1 << (ld2(min_period_size - 1) + 1); 757 if (oss_period_size < min_period_size) 758 oss_period_size = min_period_size; 759 760 max_period_size = snd_pcm_plug_client_size(substream, 761 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 762 max_period_size *= oss_frame_size; 763 max_period_size = 1 << ld2(max_period_size); 764 if (oss_period_size > max_period_size) 765 oss_period_size = max_period_size; 766 767 oss_periods = oss_buffer_size / oss_period_size; 768 769 if (substream->oss.setup.periods > 1) 770 oss_periods = substream->oss.setup.periods; 771 772 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 773 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 774 s = runtime->oss.maxfrags; 775 if (oss_periods > s) 776 oss_periods = s; 777 778 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 779 if (s < 2) 780 s = 2; 781 if (oss_periods < s) 782 oss_periods = s; 783 784 while (oss_period_size * oss_periods > oss_buffer_size) 785 oss_period_size /= 2; 786 787 if (oss_period_size < 16) 788 return -EINVAL; 789 runtime->oss.period_bytes = oss_period_size; 790 runtime->oss.period_frames = 1; 791 runtime->oss.periods = oss_periods; 792 return 0; 793 } 794 795 static int choose_rate(struct snd_pcm_substream *substream, 796 struct snd_pcm_hw_params *params, unsigned int best_rate) 797 { 798 struct snd_interval *it; 799 struct snd_pcm_hw_params *save; 800 unsigned int rate, prev; 801 802 save = kmalloc(sizeof(*save), GFP_KERNEL); 803 if (save == NULL) 804 return -ENOMEM; 805 *save = *params; 806 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 807 808 /* try multiples of the best rate */ 809 rate = best_rate; 810 for (;;) { 811 if (it->max < rate || (it->max == rate && it->openmax)) 812 break; 813 if (it->min < rate || (it->min == rate && !it->openmin)) { 814 int ret; 815 ret = snd_pcm_hw_param_set(substream, params, 816 SNDRV_PCM_HW_PARAM_RATE, 817 rate, 0); 818 if (ret == (int)rate) { 819 kfree(save); 820 return rate; 821 } 822 *params = *save; 823 } 824 prev = rate; 825 rate += best_rate; 826 if (rate <= prev) 827 break; 828 } 829 830 /* not found, use the nearest rate */ 831 kfree(save); 832 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 833 } 834 835 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 836 { 837 struct snd_pcm_runtime *runtime = substream->runtime; 838 struct snd_pcm_hw_params *params, *sparams; 839 struct snd_pcm_sw_params *sw_params; 840 ssize_t oss_buffer_size, oss_period_size; 841 size_t oss_frame_size; 842 int err; 843 int direct; 844 int format, sformat, n; 845 struct snd_mask sformat_mask; 846 struct snd_mask mask; 847 848 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 849 return -EINTR; 850 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 851 params = kmalloc(sizeof(*params), GFP_KERNEL); 852 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 853 if (!sw_params || !params || !sparams) { 854 snd_printd("No memory\n"); 855 err = -ENOMEM; 856 goto failure; 857 } 858 859 if (atomic_read(&substream->mmap_count)) 860 direct = 1; 861 else 862 direct = substream->oss.setup.direct; 863 864 _snd_pcm_hw_params_any(sparams); 865 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 866 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 867 snd_mask_none(&mask); 868 if (atomic_read(&substream->mmap_count)) 869 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 870 else { 871 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); 872 if (!direct) 873 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 874 } 875 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 876 if (err < 0) { 877 snd_printd("No usable accesses\n"); 878 err = -EINVAL; 879 goto failure; 880 } 881 choose_rate(substream, sparams, runtime->oss.rate); 882 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 883 884 format = snd_pcm_oss_format_from(runtime->oss.format); 885 886 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 887 if (direct) 888 sformat = format; 889 else 890 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 891 892 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { 893 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { 894 if (snd_mask_test(&sformat_mask, sformat) && 895 snd_pcm_oss_format_to(sformat) >= 0) 896 break; 897 } 898 if (sformat > SNDRV_PCM_FORMAT_LAST) { 899 snd_printd("Cannot find a format!!!\n"); 900 err = -EINVAL; 901 goto failure; 902 } 903 } 904 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); 905 if (err < 0) 906 goto failure; 907 908 if (direct) { 909 memcpy(params, sparams, sizeof(*params)); 910 } else { 911 _snd_pcm_hw_params_any(params); 912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 913 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 914 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 915 snd_pcm_oss_format_from(runtime->oss.format), 0); 916 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 917 runtime->oss.channels, 0); 918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 919 runtime->oss.rate, 0); 920 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 921 params_access(params), params_format(params), 922 params_channels(params), params_rate(params)); 923 } 924 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 925 params_access(sparams), params_format(sparams), 926 params_channels(sparams), params_rate(sparams)); 927 928 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 929 params_channels(params) / 8; 930 931 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 932 snd_pcm_oss_plugin_clear(substream); 933 if (!direct) { 934 /* add necessary plugins */ 935 snd_pcm_oss_plugin_clear(substream); 936 if ((err = snd_pcm_plug_format_plugins(substream, 937 params, 938 sparams)) < 0) { 939 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); 940 snd_pcm_oss_plugin_clear(substream); 941 goto failure; 942 } 943 if (runtime->oss.plugin_first) { 944 struct snd_pcm_plugin *plugin; 945 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 946 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 947 snd_pcm_oss_plugin_clear(substream); 948 goto failure; 949 } 950 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 951 err = snd_pcm_plugin_append(plugin); 952 } else { 953 err = snd_pcm_plugin_insert(plugin); 954 } 955 if (err < 0) { 956 snd_pcm_oss_plugin_clear(substream); 957 goto failure; 958 } 959 } 960 } 961 #endif 962 963 err = snd_pcm_oss_period_size(substream, params, sparams); 964 if (err < 0) 965 goto failure; 966 967 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 968 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 969 if (err < 0) 970 goto failure; 971 972 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 973 runtime->oss.periods, NULL); 974 if (err < 0) 975 goto failure; 976 977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 978 979 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 980 snd_printd("HW_PARAMS failed: %i\n", err); 981 goto failure; 982 } 983 984 memset(sw_params, 0, sizeof(*sw_params)); 985 if (runtime->oss.trigger) { 986 sw_params->start_threshold = 1; 987 } else { 988 sw_params->start_threshold = runtime->boundary; 989 } 990 if (atomic_read(&substream->mmap_count) || 991 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 992 sw_params->stop_threshold = runtime->boundary; 993 else 994 sw_params->stop_threshold = runtime->buffer_size; 995 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 996 sw_params->period_step = 1; 997 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 998 1 : runtime->period_size; 999 if (atomic_read(&substream->mmap_count) || 1000 substream->oss.setup.nosilence) { 1001 sw_params->silence_threshold = 0; 1002 sw_params->silence_size = 0; 1003 } else { 1004 snd_pcm_uframes_t frames; 1005 frames = runtime->period_size + 16; 1006 if (frames > runtime->buffer_size) 1007 frames = runtime->buffer_size; 1008 sw_params->silence_threshold = frames; 1009 sw_params->silence_size = frames; 1010 } 1011 1012 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1013 snd_printd("SW_PARAMS failed: %i\n", err); 1014 goto failure; 1015 } 1016 1017 runtime->oss.periods = params_periods(sparams); 1018 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1019 if (oss_period_size < 0) { 1020 err = -EINVAL; 1021 goto failure; 1022 } 1023 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1024 if (runtime->oss.plugin_first) { 1025 err = snd_pcm_plug_alloc(substream, oss_period_size); 1026 if (err < 0) 1027 goto failure; 1028 } 1029 #endif 1030 oss_period_size *= oss_frame_size; 1031 1032 oss_buffer_size = oss_period_size * runtime->oss.periods; 1033 if (oss_buffer_size < 0) { 1034 err = -EINVAL; 1035 goto failure; 1036 } 1037 1038 runtime->oss.period_bytes = oss_period_size; 1039 runtime->oss.buffer_bytes = oss_buffer_size; 1040 1041 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1042 runtime->oss.period_bytes, 1043 runtime->oss.buffer_bytes); 1044 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1045 params_period_size(sparams), 1046 params_buffer_size(sparams)); 1047 1048 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1049 runtime->oss.channels = params_channels(params); 1050 runtime->oss.rate = params_rate(params); 1051 1052 vfree(runtime->oss.buffer); 1053 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1054 if (!runtime->oss.buffer) { 1055 err = -ENOMEM; 1056 goto failure; 1057 } 1058 1059 runtime->oss.params = 0; 1060 runtime->oss.prepare = 1; 1061 runtime->oss.buffer_used = 0; 1062 if (runtime->dma_area) 1063 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1064 1065 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1066 1067 err = 0; 1068 failure: 1069 kfree(sw_params); 1070 kfree(params); 1071 kfree(sparams); 1072 mutex_unlock(&runtime->oss.params_lock); 1073 return err; 1074 } 1075 1076 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1077 { 1078 int idx, err; 1079 struct snd_pcm_substream *asubstream = NULL, *substream; 1080 1081 for (idx = 0; idx < 2; idx++) { 1082 substream = pcm_oss_file->streams[idx]; 1083 if (substream == NULL) 1084 continue; 1085 if (asubstream == NULL) 1086 asubstream = substream; 1087 if (substream->runtime->oss.params) { 1088 err = snd_pcm_oss_change_params(substream); 1089 if (err < 0) 1090 return err; 1091 } 1092 } 1093 if (!asubstream) 1094 return -EIO; 1095 if (r_substream) 1096 *r_substream = asubstream; 1097 return 0; 1098 } 1099 1100 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1101 { 1102 int err; 1103 struct snd_pcm_runtime *runtime = substream->runtime; 1104 1105 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1106 if (err < 0) { 1107 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1108 return err; 1109 } 1110 runtime->oss.prepare = 0; 1111 runtime->oss.prev_hw_ptr_period = 0; 1112 runtime->oss.period_ptr = 0; 1113 runtime->oss.buffer_used = 0; 1114 1115 return 0; 1116 } 1117 1118 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1119 { 1120 struct snd_pcm_runtime *runtime; 1121 int err; 1122 1123 if (substream == NULL) 1124 return 0; 1125 runtime = substream->runtime; 1126 if (runtime->oss.params) { 1127 err = snd_pcm_oss_change_params(substream); 1128 if (err < 0) 1129 return err; 1130 } 1131 if (runtime->oss.prepare) { 1132 err = snd_pcm_oss_prepare(substream); 1133 if (err < 0) 1134 return err; 1135 } 1136 return 0; 1137 } 1138 1139 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1140 { 1141 struct snd_pcm_runtime *runtime; 1142 snd_pcm_uframes_t frames; 1143 int err = 0; 1144 1145 while (1) { 1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1147 if (err < 0) 1148 break; 1149 runtime = substream->runtime; 1150 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1151 break; 1152 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1153 /* until avail(delay) <= buffer_size */ 1154 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1155 frames /= runtime->period_size; 1156 frames *= runtime->period_size; 1157 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1158 if (err < 0) 1159 break; 1160 } 1161 return err; 1162 } 1163 1164 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1165 { 1166 struct snd_pcm_runtime *runtime = substream->runtime; 1167 int ret; 1168 while (1) { 1169 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1170 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1171 #ifdef OSS_DEBUG 1172 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1173 printk(KERN_DEBUG "pcm_oss: write: " 1174 "recovering from XRUN\n"); 1175 else 1176 printk(KERN_DEBUG "pcm_oss: write: " 1177 "recovering from SUSPEND\n"); 1178 #endif 1179 ret = snd_pcm_oss_prepare(substream); 1180 if (ret < 0) 1181 break; 1182 } 1183 if (in_kernel) { 1184 mm_segment_t fs; 1185 fs = snd_enter_user(); 1186 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1187 snd_leave_user(fs); 1188 } else { 1189 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1190 } 1191 if (ret != -EPIPE && ret != -ESTRPIPE) 1192 break; 1193 /* test, if we can't store new data, because the stream */ 1194 /* has not been started */ 1195 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1196 return -EAGAIN; 1197 } 1198 return ret; 1199 } 1200 1201 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1202 { 1203 struct snd_pcm_runtime *runtime = substream->runtime; 1204 snd_pcm_sframes_t delay; 1205 int ret; 1206 while (1) { 1207 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1208 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1209 #ifdef OSS_DEBUG 1210 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1211 printk(KERN_DEBUG "pcm_oss: read: " 1212 "recovering from XRUN\n"); 1213 else 1214 printk(KERN_DEBUG "pcm_oss: read: " 1215 "recovering from SUSPEND\n"); 1216 #endif 1217 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1218 if (ret < 0) 1219 break; 1220 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1221 ret = snd_pcm_oss_prepare(substream); 1222 if (ret < 0) 1223 break; 1224 } 1225 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1226 if (ret < 0) 1227 break; 1228 if (in_kernel) { 1229 mm_segment_t fs; 1230 fs = snd_enter_user(); 1231 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1232 snd_leave_user(fs); 1233 } else { 1234 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1235 } 1236 if (ret == -EPIPE) { 1237 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1238 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1239 if (ret < 0) 1240 break; 1241 } 1242 continue; 1243 } 1244 if (ret != -ESTRPIPE) 1245 break; 1246 } 1247 return ret; 1248 } 1249 1250 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1251 { 1252 struct snd_pcm_runtime *runtime = substream->runtime; 1253 int ret; 1254 while (1) { 1255 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1256 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1257 #ifdef OSS_DEBUG 1258 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1259 printk(KERN_DEBUG "pcm_oss: writev: " 1260 "recovering from XRUN\n"); 1261 else 1262 printk(KERN_DEBUG "pcm_oss: writev: " 1263 "recovering from SUSPEND\n"); 1264 #endif 1265 ret = snd_pcm_oss_prepare(substream); 1266 if (ret < 0) 1267 break; 1268 } 1269 if (in_kernel) { 1270 mm_segment_t fs; 1271 fs = snd_enter_user(); 1272 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1273 snd_leave_user(fs); 1274 } else { 1275 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1276 } 1277 if (ret != -EPIPE && ret != -ESTRPIPE) 1278 break; 1279 1280 /* test, if we can't store new data, because the stream */ 1281 /* has not been started */ 1282 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1283 return -EAGAIN; 1284 } 1285 return ret; 1286 } 1287 1288 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1289 { 1290 struct snd_pcm_runtime *runtime = substream->runtime; 1291 int ret; 1292 while (1) { 1293 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1294 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1295 #ifdef OSS_DEBUG 1296 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1297 printk(KERN_DEBUG "pcm_oss: readv: " 1298 "recovering from XRUN\n"); 1299 else 1300 printk(KERN_DEBUG "pcm_oss: readv: " 1301 "recovering from SUSPEND\n"); 1302 #endif 1303 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1304 if (ret < 0) 1305 break; 1306 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1307 ret = snd_pcm_oss_prepare(substream); 1308 if (ret < 0) 1309 break; 1310 } 1311 if (in_kernel) { 1312 mm_segment_t fs; 1313 fs = snd_enter_user(); 1314 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1315 snd_leave_user(fs); 1316 } else { 1317 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1318 } 1319 if (ret != -EPIPE && ret != -ESTRPIPE) 1320 break; 1321 } 1322 return ret; 1323 } 1324 1325 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1326 { 1327 struct snd_pcm_runtime *runtime = substream->runtime; 1328 snd_pcm_sframes_t frames, frames1; 1329 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1330 if (runtime->oss.plugin_first) { 1331 struct snd_pcm_plugin_channel *channels; 1332 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1333 if (!in_kernel) { 1334 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) 1335 return -EFAULT; 1336 buf = runtime->oss.buffer; 1337 } 1338 frames = bytes / oss_frame_bytes; 1339 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1340 if (frames1 < 0) 1341 return frames1; 1342 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1343 if (frames1 <= 0) 1344 return frames1; 1345 bytes = frames1 * oss_frame_bytes; 1346 } else 1347 #endif 1348 { 1349 frames = bytes_to_frames(runtime, bytes); 1350 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1351 if (frames1 <= 0) 1352 return frames1; 1353 bytes = frames_to_bytes(runtime, frames1); 1354 } 1355 return bytes; 1356 } 1357 1358 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1359 { 1360 size_t xfer = 0; 1361 ssize_t tmp; 1362 struct snd_pcm_runtime *runtime = substream->runtime; 1363 1364 if (atomic_read(&substream->mmap_count)) 1365 return -ENXIO; 1366 1367 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1368 return tmp; 1369 mutex_lock(&runtime->oss.params_lock); 1370 while (bytes > 0) { 1371 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1372 tmp = bytes; 1373 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1374 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1375 if (tmp > 0) { 1376 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1377 tmp = -EFAULT; 1378 goto err; 1379 } 1380 } 1381 runtime->oss.buffer_used += tmp; 1382 buf += tmp; 1383 bytes -= tmp; 1384 xfer += tmp; 1385 if (substream->oss.setup.partialfrag || 1386 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1387 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1388 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1389 if (tmp <= 0) 1390 goto err; 1391 runtime->oss.bytes += tmp; 1392 runtime->oss.period_ptr += tmp; 1393 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1394 if (runtime->oss.period_ptr == 0 || 1395 runtime->oss.period_ptr == runtime->oss.buffer_used) 1396 runtime->oss.buffer_used = 0; 1397 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1398 tmp = -EAGAIN; 1399 goto err; 1400 } 1401 } 1402 } else { 1403 tmp = snd_pcm_oss_write2(substream, 1404 (const char __force *)buf, 1405 runtime->oss.period_bytes, 0); 1406 if (tmp <= 0) 1407 goto err; 1408 runtime->oss.bytes += tmp; 1409 buf += tmp; 1410 bytes -= tmp; 1411 xfer += tmp; 1412 if ((substream->f_flags & O_NONBLOCK) != 0 && 1413 tmp != runtime->oss.period_bytes) 1414 break; 1415 } 1416 } 1417 mutex_unlock(&runtime->oss.params_lock); 1418 return xfer; 1419 1420 err: 1421 mutex_unlock(&runtime->oss.params_lock); 1422 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1423 } 1424 1425 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1426 { 1427 struct snd_pcm_runtime *runtime = substream->runtime; 1428 snd_pcm_sframes_t frames, frames1; 1429 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1430 char __user *final_dst = (char __user *)buf; 1431 if (runtime->oss.plugin_first) { 1432 struct snd_pcm_plugin_channel *channels; 1433 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1434 if (!in_kernel) 1435 buf = runtime->oss.buffer; 1436 frames = bytes / oss_frame_bytes; 1437 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1438 if (frames1 < 0) 1439 return frames1; 1440 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1441 if (frames1 <= 0) 1442 return frames1; 1443 bytes = frames1 * oss_frame_bytes; 1444 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1445 return -EFAULT; 1446 } else 1447 #endif 1448 { 1449 frames = bytes_to_frames(runtime, bytes); 1450 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1451 if (frames1 <= 0) 1452 return frames1; 1453 bytes = frames_to_bytes(runtime, frames1); 1454 } 1455 return bytes; 1456 } 1457 1458 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1459 { 1460 size_t xfer = 0; 1461 ssize_t tmp; 1462 struct snd_pcm_runtime *runtime = substream->runtime; 1463 1464 if (atomic_read(&substream->mmap_count)) 1465 return -ENXIO; 1466 1467 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1468 return tmp; 1469 mutex_lock(&runtime->oss.params_lock); 1470 while (bytes > 0) { 1471 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1472 if (runtime->oss.buffer_used == 0) { 1473 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1474 if (tmp <= 0) 1475 goto err; 1476 runtime->oss.bytes += tmp; 1477 runtime->oss.period_ptr = tmp; 1478 runtime->oss.buffer_used = tmp; 1479 } 1480 tmp = bytes; 1481 if ((size_t) tmp > runtime->oss.buffer_used) 1482 tmp = runtime->oss.buffer_used; 1483 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1484 tmp = -EFAULT; 1485 goto err; 1486 } 1487 buf += tmp; 1488 bytes -= tmp; 1489 xfer += tmp; 1490 runtime->oss.buffer_used -= tmp; 1491 } else { 1492 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1493 runtime->oss.period_bytes, 0); 1494 if (tmp <= 0) 1495 goto err; 1496 runtime->oss.bytes += tmp; 1497 buf += tmp; 1498 bytes -= tmp; 1499 xfer += tmp; 1500 } 1501 } 1502 mutex_unlock(&runtime->oss.params_lock); 1503 return xfer; 1504 1505 err: 1506 mutex_unlock(&runtime->oss.params_lock); 1507 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1508 } 1509 1510 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1511 { 1512 struct snd_pcm_substream *substream; 1513 1514 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1515 if (substream != NULL) { 1516 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1517 substream->runtime->oss.prepare = 1; 1518 } 1519 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1520 if (substream != NULL) { 1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1522 substream->runtime->oss.prepare = 1; 1523 } 1524 return 0; 1525 } 1526 1527 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1528 { 1529 struct snd_pcm_substream *substream; 1530 int err; 1531 1532 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1533 if (substream != NULL) { 1534 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1535 return err; 1536 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1537 } 1538 /* note: all errors from the start action are ignored */ 1539 /* OSS apps do not know, how to handle them */ 1540 return 0; 1541 } 1542 1543 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1544 { 1545 struct snd_pcm_runtime *runtime; 1546 ssize_t result = 0; 1547 long res; 1548 wait_queue_t wait; 1549 1550 runtime = substream->runtime; 1551 init_waitqueue_entry(&wait, current); 1552 add_wait_queue(&runtime->sleep, &wait); 1553 #ifdef OSS_DEBUG 1554 printk(KERN_DEBUG "sync1: size = %li\n", size); 1555 #endif 1556 while (1) { 1557 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1558 if (result > 0) { 1559 runtime->oss.buffer_used = 0; 1560 result = 0; 1561 break; 1562 } 1563 if (result != 0 && result != -EAGAIN) 1564 break; 1565 result = 0; 1566 set_current_state(TASK_INTERRUPTIBLE); 1567 snd_pcm_stream_lock_irq(substream); 1568 res = runtime->status->state; 1569 snd_pcm_stream_unlock_irq(substream); 1570 if (res != SNDRV_PCM_STATE_RUNNING) { 1571 set_current_state(TASK_RUNNING); 1572 break; 1573 } 1574 res = schedule_timeout(10 * HZ); 1575 if (signal_pending(current)) { 1576 result = -ERESTARTSYS; 1577 break; 1578 } 1579 if (res == 0) { 1580 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1581 result = -EIO; 1582 break; 1583 } 1584 } 1585 remove_wait_queue(&runtime->sleep, &wait); 1586 return result; 1587 } 1588 1589 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1590 { 1591 int err = 0; 1592 unsigned int saved_f_flags; 1593 struct snd_pcm_substream *substream; 1594 struct snd_pcm_runtime *runtime; 1595 snd_pcm_format_t format; 1596 unsigned long width; 1597 size_t size; 1598 1599 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1600 if (substream != NULL) { 1601 runtime = substream->runtime; 1602 if (atomic_read(&substream->mmap_count)) 1603 goto __direct; 1604 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1605 return err; 1606 format = snd_pcm_oss_format_from(runtime->oss.format); 1607 width = snd_pcm_format_physical_width(format); 1608 mutex_lock(&runtime->oss.params_lock); 1609 if (runtime->oss.buffer_used > 0) { 1610 #ifdef OSS_DEBUG 1611 printk(KERN_DEBUG "sync: buffer_used\n"); 1612 #endif 1613 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1614 snd_pcm_format_set_silence(format, 1615 runtime->oss.buffer + runtime->oss.buffer_used, 1616 size); 1617 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1618 if (err < 0) { 1619 mutex_unlock(&runtime->oss.params_lock); 1620 return err; 1621 } 1622 } else if (runtime->oss.period_ptr > 0) { 1623 #ifdef OSS_DEBUG 1624 printk(KERN_DEBUG "sync: period_ptr\n"); 1625 #endif 1626 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1627 snd_pcm_format_set_silence(format, 1628 runtime->oss.buffer, 1629 size * 8 / width); 1630 err = snd_pcm_oss_sync1(substream, size); 1631 if (err < 0) { 1632 mutex_unlock(&runtime->oss.params_lock); 1633 return err; 1634 } 1635 } 1636 /* 1637 * The ALSA's period might be a bit large than OSS one. 1638 * Fill the remain portion of ALSA period with zeros. 1639 */ 1640 size = runtime->control->appl_ptr % runtime->period_size; 1641 if (size > 0) { 1642 size = runtime->period_size - size; 1643 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1644 size = (runtime->frame_bits * size) / 8; 1645 while (size > 0) { 1646 mm_segment_t fs; 1647 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1648 size -= size1; 1649 size1 *= 8; 1650 size1 /= runtime->sample_bits; 1651 snd_pcm_format_set_silence(runtime->format, 1652 runtime->oss.buffer, 1653 size1); 1654 size1 /= runtime->channels; /* frames */ 1655 fs = snd_enter_user(); 1656 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1657 snd_leave_user(fs); 1658 } 1659 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1660 void __user *buffers[runtime->channels]; 1661 memset(buffers, 0, runtime->channels * sizeof(void *)); 1662 snd_pcm_lib_writev(substream, buffers, size); 1663 } 1664 } 1665 mutex_unlock(&runtime->oss.params_lock); 1666 /* 1667 * finish sync: drain the buffer 1668 */ 1669 __direct: 1670 saved_f_flags = substream->f_flags; 1671 substream->f_flags &= ~O_NONBLOCK; 1672 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1673 substream->f_flags = saved_f_flags; 1674 if (err < 0) 1675 return err; 1676 runtime->oss.prepare = 1; 1677 } 1678 1679 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1680 if (substream != NULL) { 1681 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1682 return err; 1683 runtime = substream->runtime; 1684 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1685 if (err < 0) 1686 return err; 1687 runtime->oss.buffer_used = 0; 1688 runtime->oss.prepare = 1; 1689 } 1690 return 0; 1691 } 1692 1693 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1694 { 1695 int idx; 1696 1697 for (idx = 1; idx >= 0; --idx) { 1698 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1699 struct snd_pcm_runtime *runtime; 1700 if (substream == NULL) 1701 continue; 1702 runtime = substream->runtime; 1703 if (rate < 1000) 1704 rate = 1000; 1705 else if (rate > 192000) 1706 rate = 192000; 1707 if (runtime->oss.rate != rate) { 1708 runtime->oss.params = 1; 1709 runtime->oss.rate = rate; 1710 } 1711 } 1712 return snd_pcm_oss_get_rate(pcm_oss_file); 1713 } 1714 1715 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1716 { 1717 struct snd_pcm_substream *substream; 1718 int err; 1719 1720 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1721 return err; 1722 return substream->runtime->oss.rate; 1723 } 1724 1725 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1726 { 1727 int idx; 1728 if (channels < 1) 1729 channels = 1; 1730 if (channels > 128) 1731 return -EINVAL; 1732 for (idx = 1; idx >= 0; --idx) { 1733 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1734 struct snd_pcm_runtime *runtime; 1735 if (substream == NULL) 1736 continue; 1737 runtime = substream->runtime; 1738 if (runtime->oss.channels != channels) { 1739 runtime->oss.params = 1; 1740 runtime->oss.channels = channels; 1741 } 1742 } 1743 return snd_pcm_oss_get_channels(pcm_oss_file); 1744 } 1745 1746 static int snd_pcm_oss_get_channels(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.channels; 1754 } 1755 1756 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1757 { 1758 struct snd_pcm_substream *substream; 1759 int err; 1760 1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1762 return err; 1763 return substream->runtime->oss.period_bytes; 1764 } 1765 1766 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1767 { 1768 struct snd_pcm_substream *substream; 1769 int err; 1770 int direct; 1771 struct snd_pcm_hw_params *params; 1772 unsigned int formats = 0; 1773 struct snd_mask format_mask; 1774 int fmt; 1775 1776 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1777 return err; 1778 if (atomic_read(&substream->mmap_count)) 1779 direct = 1; 1780 else 1781 direct = substream->oss.setup.direct; 1782 if (!direct) 1783 return AFMT_MU_LAW | AFMT_U8 | 1784 AFMT_S16_LE | AFMT_S16_BE | 1785 AFMT_S8 | AFMT_U16_LE | 1786 AFMT_U16_BE | 1787 AFMT_S32_LE | AFMT_S32_BE | 1788 AFMT_S24_LE | AFMT_S24_BE | 1789 AFMT_S24_PACKED; 1790 params = kmalloc(sizeof(*params), GFP_KERNEL); 1791 if (!params) 1792 return -ENOMEM; 1793 _snd_pcm_hw_params_any(params); 1794 err = snd_pcm_hw_refine(substream, params); 1795 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1796 kfree(params); 1797 if (err < 0) 1798 return err; 1799 for (fmt = 0; fmt < 32; ++fmt) { 1800 if (snd_mask_test(&format_mask, fmt)) { 1801 int f = snd_pcm_oss_format_to(fmt); 1802 if (f >= 0) 1803 formats |= f; 1804 } 1805 } 1806 return formats; 1807 } 1808 1809 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1810 { 1811 int formats, idx; 1812 1813 if (format != AFMT_QUERY) { 1814 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1815 if (formats < 0) 1816 return formats; 1817 if (!(formats & format)) 1818 format = AFMT_U8; 1819 for (idx = 1; idx >= 0; --idx) { 1820 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1821 struct snd_pcm_runtime *runtime; 1822 if (substream == NULL) 1823 continue; 1824 runtime = substream->runtime; 1825 if (runtime->oss.format != format) { 1826 runtime->oss.params = 1; 1827 runtime->oss.format = format; 1828 } 1829 } 1830 } 1831 return snd_pcm_oss_get_format(pcm_oss_file); 1832 } 1833 1834 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1835 { 1836 struct snd_pcm_substream *substream; 1837 int err; 1838 1839 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1840 return err; 1841 return substream->runtime->oss.format; 1842 } 1843 1844 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1845 { 1846 struct snd_pcm_runtime *runtime; 1847 1848 if (substream == NULL) 1849 return 0; 1850 runtime = substream->runtime; 1851 if (subdivide == 0) { 1852 subdivide = runtime->oss.subdivision; 1853 if (subdivide == 0) 1854 subdivide = 1; 1855 return subdivide; 1856 } 1857 if (runtime->oss.subdivision || runtime->oss.fragshift) 1858 return -EINVAL; 1859 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1860 subdivide != 8 && subdivide != 16) 1861 return -EINVAL; 1862 runtime->oss.subdivision = subdivide; 1863 runtime->oss.params = 1; 1864 return subdivide; 1865 } 1866 1867 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1868 { 1869 int err = -EINVAL, idx; 1870 1871 for (idx = 1; idx >= 0; --idx) { 1872 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1873 if (substream == NULL) 1874 continue; 1875 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1876 return err; 1877 } 1878 return err; 1879 } 1880 1881 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1882 { 1883 struct snd_pcm_runtime *runtime; 1884 1885 if (substream == NULL) 1886 return 0; 1887 runtime = substream->runtime; 1888 if (runtime->oss.subdivision || runtime->oss.fragshift) 1889 return -EINVAL; 1890 runtime->oss.fragshift = val & 0xffff; 1891 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1892 if (runtime->oss.fragshift < 4) /* < 16 */ 1893 runtime->oss.fragshift = 4; 1894 if (runtime->oss.maxfrags < 2) 1895 runtime->oss.maxfrags = 2; 1896 runtime->oss.params = 1; 1897 return 0; 1898 } 1899 1900 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1901 { 1902 int err = -EINVAL, idx; 1903 1904 for (idx = 1; idx >= 0; --idx) { 1905 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1906 if (substream == NULL) 1907 continue; 1908 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1909 return err; 1910 } 1911 return err; 1912 } 1913 1914 static int snd_pcm_oss_nonblock(struct file * file) 1915 { 1916 spin_lock(&file->f_lock); 1917 file->f_flags |= O_NONBLOCK; 1918 spin_unlock(&file->f_lock); 1919 return 0; 1920 } 1921 1922 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1923 { 1924 1925 if (substream == NULL) { 1926 res &= ~DSP_CAP_DUPLEX; 1927 return res; 1928 } 1929 #ifdef DSP_CAP_MULTI 1930 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1931 if (substream->pstr->substream_count > 1) 1932 res |= DSP_CAP_MULTI; 1933 #endif 1934 /* DSP_CAP_REALTIME is set all times: */ 1935 /* all ALSA drivers can return actual pointer in ring buffer */ 1936 #if defined(DSP_CAP_REALTIME) && 0 1937 { 1938 struct snd_pcm_runtime *runtime = substream->runtime; 1939 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1940 res &= ~DSP_CAP_REALTIME; 1941 } 1942 #endif 1943 return res; 1944 } 1945 1946 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1947 { 1948 int result, idx; 1949 1950 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1951 for (idx = 0; idx < 2; idx++) { 1952 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1953 result = snd_pcm_oss_get_caps1(substream, result); 1954 } 1955 result |= 0x0001; /* revision - same as SB AWE 64 */ 1956 return result; 1957 } 1958 1959 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 1960 snd_pcm_uframes_t hw_ptr) 1961 { 1962 struct snd_pcm_runtime *runtime = substream->runtime; 1963 snd_pcm_uframes_t appl_ptr; 1964 appl_ptr = hw_ptr + runtime->buffer_size; 1965 appl_ptr %= runtime->boundary; 1966 runtime->control->appl_ptr = appl_ptr; 1967 } 1968 1969 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1970 { 1971 struct snd_pcm_runtime *runtime; 1972 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1973 int err, cmd; 1974 1975 #ifdef OSS_DEBUG 1976 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger); 1977 #endif 1978 1979 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1980 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1981 1982 if (psubstream) { 1983 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1984 return err; 1985 } 1986 if (csubstream) { 1987 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1988 return err; 1989 } 1990 if (psubstream) { 1991 runtime = psubstream->runtime; 1992 if (trigger & PCM_ENABLE_OUTPUT) { 1993 if (runtime->oss.trigger) 1994 goto _skip1; 1995 if (atomic_read(&psubstream->mmap_count)) 1996 snd_pcm_oss_simulate_fill(psubstream, 1997 get_hw_ptr_period(runtime)); 1998 runtime->oss.trigger = 1; 1999 runtime->start_threshold = 1; 2000 cmd = SNDRV_PCM_IOCTL_START; 2001 } else { 2002 if (!runtime->oss.trigger) 2003 goto _skip1; 2004 runtime->oss.trigger = 0; 2005 runtime->start_threshold = runtime->boundary; 2006 cmd = SNDRV_PCM_IOCTL_DROP; 2007 runtime->oss.prepare = 1; 2008 } 2009 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2010 if (err < 0) 2011 return err; 2012 } 2013 _skip1: 2014 if (csubstream) { 2015 runtime = csubstream->runtime; 2016 if (trigger & PCM_ENABLE_INPUT) { 2017 if (runtime->oss.trigger) 2018 goto _skip2; 2019 runtime->oss.trigger = 1; 2020 runtime->start_threshold = 1; 2021 cmd = SNDRV_PCM_IOCTL_START; 2022 } else { 2023 if (!runtime->oss.trigger) 2024 goto _skip2; 2025 runtime->oss.trigger = 0; 2026 runtime->start_threshold = runtime->boundary; 2027 cmd = SNDRV_PCM_IOCTL_DROP; 2028 runtime->oss.prepare = 1; 2029 } 2030 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2031 if (err < 0) 2032 return err; 2033 } 2034 _skip2: 2035 return 0; 2036 } 2037 2038 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2039 { 2040 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2041 int result = 0; 2042 2043 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2044 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2045 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2046 result |= PCM_ENABLE_OUTPUT; 2047 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2048 result |= PCM_ENABLE_INPUT; 2049 return result; 2050 } 2051 2052 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2053 { 2054 struct snd_pcm_substream *substream; 2055 struct snd_pcm_runtime *runtime; 2056 snd_pcm_sframes_t delay; 2057 int err; 2058 2059 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2060 if (substream == NULL) 2061 return -EINVAL; 2062 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2063 return err; 2064 runtime = substream->runtime; 2065 if (runtime->oss.params || runtime->oss.prepare) 2066 return 0; 2067 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2068 if (err == -EPIPE) 2069 delay = 0; /* hack for broken OSS applications */ 2070 else if (err < 0) 2071 return err; 2072 return snd_pcm_oss_bytes(substream, delay); 2073 } 2074 2075 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2076 { 2077 struct snd_pcm_substream *substream; 2078 struct snd_pcm_runtime *runtime; 2079 snd_pcm_sframes_t delay; 2080 int fixup; 2081 struct count_info info; 2082 int err; 2083 2084 if (_info == NULL) 2085 return -EFAULT; 2086 substream = pcm_oss_file->streams[stream]; 2087 if (substream == NULL) 2088 return -EINVAL; 2089 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2090 return err; 2091 runtime = substream->runtime; 2092 if (runtime->oss.params || runtime->oss.prepare) { 2093 memset(&info, 0, sizeof(info)); 2094 if (copy_to_user(_info, &info, sizeof(info))) 2095 return -EFAULT; 2096 return 0; 2097 } 2098 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2099 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2100 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2101 err = 0; 2102 delay = 0; 2103 fixup = 0; 2104 } else { 2105 fixup = runtime->oss.buffer_used; 2106 } 2107 } else { 2108 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2109 fixup = -runtime->oss.buffer_used; 2110 } 2111 if (err < 0) 2112 return err; 2113 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2114 if (atomic_read(&substream->mmap_count)) { 2115 snd_pcm_sframes_t n; 2116 delay = get_hw_ptr_period(runtime); 2117 n = delay - runtime->oss.prev_hw_ptr_period; 2118 if (n < 0) 2119 n += runtime->boundary; 2120 info.blocks = n / runtime->period_size; 2121 runtime->oss.prev_hw_ptr_period = delay; 2122 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2123 snd_pcm_oss_simulate_fill(substream, delay); 2124 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2125 } else { 2126 delay = snd_pcm_oss_bytes(substream, delay); 2127 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2128 if (substream->oss.setup.buggyptr) 2129 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2130 else 2131 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2132 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2133 } else { 2134 delay += fixup; 2135 info.blocks = delay / runtime->oss.period_bytes; 2136 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2137 } 2138 } 2139 if (copy_to_user(_info, &info, sizeof(info))) 2140 return -EFAULT; 2141 return 0; 2142 } 2143 2144 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2145 { 2146 struct snd_pcm_substream *substream; 2147 struct snd_pcm_runtime *runtime; 2148 snd_pcm_sframes_t avail; 2149 int fixup; 2150 struct audio_buf_info info; 2151 int err; 2152 2153 if (_info == NULL) 2154 return -EFAULT; 2155 substream = pcm_oss_file->streams[stream]; 2156 if (substream == NULL) 2157 return -EINVAL; 2158 runtime = substream->runtime; 2159 2160 if (runtime->oss.params && 2161 (err = snd_pcm_oss_change_params(substream)) < 0) 2162 return err; 2163 2164 info.fragsize = runtime->oss.period_bytes; 2165 info.fragstotal = runtime->periods; 2166 if (runtime->oss.prepare) { 2167 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2168 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2169 info.fragments = runtime->oss.periods; 2170 } else { 2171 info.bytes = 0; 2172 info.fragments = 0; 2173 } 2174 } else { 2175 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2176 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2177 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2178 avail = runtime->buffer_size; 2179 err = 0; 2180 fixup = 0; 2181 } else { 2182 avail = runtime->buffer_size - avail; 2183 fixup = -runtime->oss.buffer_used; 2184 } 2185 } else { 2186 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2187 fixup = runtime->oss.buffer_used; 2188 } 2189 if (err < 0) 2190 return err; 2191 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2192 info.fragments = info.bytes / runtime->oss.period_bytes; 2193 } 2194 2195 #ifdef OSS_DEBUG 2196 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, " 2197 "fragstotal = %i, fragsize = %i\n", 2198 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2199 #endif 2200 if (copy_to_user(_info, &info, sizeof(info))) 2201 return -EFAULT; 2202 return 0; 2203 } 2204 2205 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2206 { 2207 // it won't be probably implemented 2208 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 2209 return -EINVAL; 2210 } 2211 2212 static const char *strip_task_path(const char *path) 2213 { 2214 const char *ptr, *ptrl = NULL; 2215 for (ptr = path; *ptr; ptr++) { 2216 if (*ptr == '/') 2217 ptrl = ptr + 1; 2218 } 2219 return ptrl; 2220 } 2221 2222 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2223 const char *task_name, 2224 struct snd_pcm_oss_setup *rsetup) 2225 { 2226 struct snd_pcm_oss_setup *setup; 2227 2228 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2229 do { 2230 for (setup = pcm->streams[stream].oss.setup_list; setup; 2231 setup = setup->next) { 2232 if (!strcmp(setup->task_name, task_name)) 2233 goto out; 2234 } 2235 } while ((task_name = strip_task_path(task_name)) != NULL); 2236 out: 2237 if (setup) 2238 *rsetup = *setup; 2239 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2240 } 2241 2242 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2243 { 2244 struct snd_pcm_runtime *runtime; 2245 runtime = substream->runtime; 2246 vfree(runtime->oss.buffer); 2247 runtime->oss.buffer = NULL; 2248 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2249 snd_pcm_oss_plugin_clear(substream); 2250 #endif 2251 substream->oss.oss = 0; 2252 } 2253 2254 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2255 struct snd_pcm_oss_setup *setup, 2256 int minor) 2257 { 2258 struct snd_pcm_runtime *runtime; 2259 2260 substream->oss.oss = 1; 2261 substream->oss.setup = *setup; 2262 if (setup->nonblock) 2263 substream->f_flags |= O_NONBLOCK; 2264 else if (setup->block) 2265 substream->f_flags &= ~O_NONBLOCK; 2266 runtime = substream->runtime; 2267 runtime->oss.params = 1; 2268 runtime->oss.trigger = 1; 2269 runtime->oss.rate = 8000; 2270 mutex_init(&runtime->oss.params_lock); 2271 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2272 case SNDRV_MINOR_OSS_PCM_8: 2273 runtime->oss.format = AFMT_U8; 2274 break; 2275 case SNDRV_MINOR_OSS_PCM_16: 2276 runtime->oss.format = AFMT_S16_LE; 2277 break; 2278 default: 2279 runtime->oss.format = AFMT_MU_LAW; 2280 } 2281 runtime->oss.channels = 1; 2282 runtime->oss.fragshift = 0; 2283 runtime->oss.maxfrags = 0; 2284 runtime->oss.subdivision = 0; 2285 substream->pcm_release = snd_pcm_oss_release_substream; 2286 } 2287 2288 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2289 { 2290 int cidx; 2291 if (!pcm_oss_file) 2292 return 0; 2293 for (cidx = 0; cidx < 2; ++cidx) { 2294 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2295 if (substream) 2296 snd_pcm_release_substream(substream); 2297 } 2298 kfree(pcm_oss_file); 2299 return 0; 2300 } 2301 2302 static int snd_pcm_oss_open_file(struct file *file, 2303 struct snd_pcm *pcm, 2304 struct snd_pcm_oss_file **rpcm_oss_file, 2305 int minor, 2306 struct snd_pcm_oss_setup *setup) 2307 { 2308 int idx, err; 2309 struct snd_pcm_oss_file *pcm_oss_file; 2310 struct snd_pcm_substream *substream; 2311 fmode_t f_mode = file->f_mode; 2312 2313 if (rpcm_oss_file) 2314 *rpcm_oss_file = NULL; 2315 2316 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2317 if (pcm_oss_file == NULL) 2318 return -ENOMEM; 2319 2320 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2321 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2322 f_mode = FMODE_WRITE; 2323 2324 file->f_flags &= ~O_APPEND; 2325 for (idx = 0; idx < 2; idx++) { 2326 if (setup[idx].disable) 2327 continue; 2328 if (! pcm->streams[idx].substream_count) 2329 continue; /* no matching substream */ 2330 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2331 if (! (f_mode & FMODE_WRITE)) 2332 continue; 2333 } else { 2334 if (! (f_mode & FMODE_READ)) 2335 continue; 2336 } 2337 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2338 if (err < 0) { 2339 snd_pcm_oss_release_file(pcm_oss_file); 2340 return err; 2341 } 2342 2343 pcm_oss_file->streams[idx] = substream; 2344 substream->file = pcm_oss_file; 2345 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2346 } 2347 2348 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2349 snd_pcm_oss_release_file(pcm_oss_file); 2350 return -EINVAL; 2351 } 2352 2353 file->private_data = pcm_oss_file; 2354 if (rpcm_oss_file) 2355 *rpcm_oss_file = pcm_oss_file; 2356 return 0; 2357 } 2358 2359 2360 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2361 { 2362 unsigned int idx; 2363 2364 if (snd_BUG_ON(!task || !name || size < 2)) 2365 return -EINVAL; 2366 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2367 name[idx] = task->comm[idx]; 2368 name[idx] = '\0'; 2369 return 0; 2370 } 2371 2372 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2373 { 2374 int err; 2375 char task_name[32]; 2376 struct snd_pcm *pcm; 2377 struct snd_pcm_oss_file *pcm_oss_file; 2378 struct snd_pcm_oss_setup setup[2]; 2379 int nonblock; 2380 wait_queue_t wait; 2381 2382 err = nonseekable_open(inode, file); 2383 if (err < 0) 2384 return err; 2385 2386 pcm = snd_lookup_oss_minor_data(iminor(inode), 2387 SNDRV_OSS_DEVICE_TYPE_PCM); 2388 if (pcm == NULL) { 2389 err = -ENODEV; 2390 goto __error1; 2391 } 2392 err = snd_card_file_add(pcm->card, file); 2393 if (err < 0) 2394 goto __error1; 2395 if (!try_module_get(pcm->card->module)) { 2396 err = -EFAULT; 2397 goto __error2; 2398 } 2399 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2400 err = -EFAULT; 2401 goto __error; 2402 } 2403 memset(setup, 0, sizeof(setup)); 2404 if (file->f_mode & FMODE_WRITE) 2405 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2406 task_name, &setup[0]); 2407 if (file->f_mode & FMODE_READ) 2408 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2409 task_name, &setup[1]); 2410 2411 nonblock = !!(file->f_flags & O_NONBLOCK); 2412 if (!nonblock) 2413 nonblock = nonblock_open; 2414 2415 init_waitqueue_entry(&wait, current); 2416 add_wait_queue(&pcm->open_wait, &wait); 2417 mutex_lock(&pcm->open_mutex); 2418 while (1) { 2419 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2420 iminor(inode), setup); 2421 if (err >= 0) 2422 break; 2423 if (err == -EAGAIN) { 2424 if (nonblock) { 2425 err = -EBUSY; 2426 break; 2427 } 2428 } else 2429 break; 2430 set_current_state(TASK_INTERRUPTIBLE); 2431 mutex_unlock(&pcm->open_mutex); 2432 schedule(); 2433 mutex_lock(&pcm->open_mutex); 2434 if (signal_pending(current)) { 2435 err = -ERESTARTSYS; 2436 break; 2437 } 2438 } 2439 remove_wait_queue(&pcm->open_wait, &wait); 2440 mutex_unlock(&pcm->open_mutex); 2441 if (err < 0) 2442 goto __error; 2443 return err; 2444 2445 __error: 2446 module_put(pcm->card->module); 2447 __error2: 2448 snd_card_file_remove(pcm->card, file); 2449 __error1: 2450 return err; 2451 } 2452 2453 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2454 { 2455 struct snd_pcm *pcm; 2456 struct snd_pcm_substream *substream; 2457 struct snd_pcm_oss_file *pcm_oss_file; 2458 2459 pcm_oss_file = file->private_data; 2460 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2461 if (substream == NULL) 2462 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2463 if (snd_BUG_ON(!substream)) 2464 return -ENXIO; 2465 pcm = substream->pcm; 2466 if (!pcm->card->shutdown) 2467 snd_pcm_oss_sync(pcm_oss_file); 2468 mutex_lock(&pcm->open_mutex); 2469 snd_pcm_oss_release_file(pcm_oss_file); 2470 mutex_unlock(&pcm->open_mutex); 2471 wake_up(&pcm->open_wait); 2472 module_put(pcm->card->module); 2473 snd_card_file_remove(pcm->card, file); 2474 return 0; 2475 } 2476 2477 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2478 { 2479 struct snd_pcm_oss_file *pcm_oss_file; 2480 int __user *p = (int __user *)arg; 2481 int res; 2482 2483 pcm_oss_file = file->private_data; 2484 if (cmd == OSS_GETVERSION) 2485 return put_user(SNDRV_OSS_VERSION, p); 2486 if (cmd == OSS_ALSAEMULVER) 2487 return put_user(1, p); 2488 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2489 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2490 struct snd_pcm_substream *substream; 2491 int idx; 2492 for (idx = 0; idx < 2; ++idx) { 2493 substream = pcm_oss_file->streams[idx]; 2494 if (substream != NULL) 2495 break; 2496 } 2497 if (snd_BUG_ON(idx >= 2)) 2498 return -ENXIO; 2499 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2500 } 2501 #endif 2502 if (((cmd >> 8) & 0xff) != 'P') 2503 return -EINVAL; 2504 #ifdef OSS_DEBUG 2505 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd); 2506 #endif 2507 switch (cmd) { 2508 case SNDCTL_DSP_RESET: 2509 return snd_pcm_oss_reset(pcm_oss_file); 2510 case SNDCTL_DSP_SYNC: 2511 return snd_pcm_oss_sync(pcm_oss_file); 2512 case SNDCTL_DSP_SPEED: 2513 if (get_user(res, p)) 2514 return -EFAULT; 2515 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2516 return res; 2517 return put_user(res, p); 2518 case SOUND_PCM_READ_RATE: 2519 res = snd_pcm_oss_get_rate(pcm_oss_file); 2520 if (res < 0) 2521 return res; 2522 return put_user(res, p); 2523 case SNDCTL_DSP_STEREO: 2524 if (get_user(res, p)) 2525 return -EFAULT; 2526 res = res > 0 ? 2 : 1; 2527 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2528 return res; 2529 return put_user(--res, p); 2530 case SNDCTL_DSP_GETBLKSIZE: 2531 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2532 if (res < 0) 2533 return res; 2534 return put_user(res, p); 2535 case SNDCTL_DSP_SETFMT: 2536 if (get_user(res, p)) 2537 return -EFAULT; 2538 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2539 if (res < 0) 2540 return res; 2541 return put_user(res, p); 2542 case SOUND_PCM_READ_BITS: 2543 res = snd_pcm_oss_get_format(pcm_oss_file); 2544 if (res < 0) 2545 return res; 2546 return put_user(res, p); 2547 case SNDCTL_DSP_CHANNELS: 2548 if (get_user(res, p)) 2549 return -EFAULT; 2550 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2551 if (res < 0) 2552 return res; 2553 return put_user(res, p); 2554 case SOUND_PCM_READ_CHANNELS: 2555 res = snd_pcm_oss_get_channels(pcm_oss_file); 2556 if (res < 0) 2557 return res; 2558 return put_user(res, p); 2559 case SOUND_PCM_WRITE_FILTER: 2560 case SOUND_PCM_READ_FILTER: 2561 return -EIO; 2562 case SNDCTL_DSP_POST: 2563 return snd_pcm_oss_post(pcm_oss_file); 2564 case SNDCTL_DSP_SUBDIVIDE: 2565 if (get_user(res, p)) 2566 return -EFAULT; 2567 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2568 if (res < 0) 2569 return res; 2570 return put_user(res, p); 2571 case SNDCTL_DSP_SETFRAGMENT: 2572 if (get_user(res, p)) 2573 return -EFAULT; 2574 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2575 case SNDCTL_DSP_GETFMTS: 2576 res = snd_pcm_oss_get_formats(pcm_oss_file); 2577 if (res < 0) 2578 return res; 2579 return put_user(res, p); 2580 case SNDCTL_DSP_GETOSPACE: 2581 case SNDCTL_DSP_GETISPACE: 2582 return snd_pcm_oss_get_space(pcm_oss_file, 2583 cmd == SNDCTL_DSP_GETISPACE ? 2584 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2585 (struct audio_buf_info __user *) arg); 2586 case SNDCTL_DSP_NONBLOCK: 2587 return snd_pcm_oss_nonblock(file); 2588 case SNDCTL_DSP_GETCAPS: 2589 res = snd_pcm_oss_get_caps(pcm_oss_file); 2590 if (res < 0) 2591 return res; 2592 return put_user(res, p); 2593 case SNDCTL_DSP_GETTRIGGER: 2594 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2595 if (res < 0) 2596 return res; 2597 return put_user(res, p); 2598 case SNDCTL_DSP_SETTRIGGER: 2599 if (get_user(res, p)) 2600 return -EFAULT; 2601 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2602 case SNDCTL_DSP_GETIPTR: 2603 case SNDCTL_DSP_GETOPTR: 2604 return snd_pcm_oss_get_ptr(pcm_oss_file, 2605 cmd == SNDCTL_DSP_GETIPTR ? 2606 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2607 (struct count_info __user *) arg); 2608 case SNDCTL_DSP_MAPINBUF: 2609 case SNDCTL_DSP_MAPOUTBUF: 2610 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2611 cmd == SNDCTL_DSP_MAPINBUF ? 2612 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2613 (struct buffmem_desc __user *) arg); 2614 case SNDCTL_DSP_SETSYNCRO: 2615 /* stop DMA now.. */ 2616 return 0; 2617 case SNDCTL_DSP_SETDUPLEX: 2618 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2619 return 0; 2620 return -EIO; 2621 case SNDCTL_DSP_GETODELAY: 2622 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2623 if (res < 0) { 2624 /* it's for sure, some broken apps don't check for error codes */ 2625 put_user(0, p); 2626 return res; 2627 } 2628 return put_user(res, p); 2629 case SNDCTL_DSP_PROFILE: 2630 return 0; /* silently ignore */ 2631 default: 2632 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2633 } 2634 return -EINVAL; 2635 } 2636 2637 #ifdef CONFIG_COMPAT 2638 /* all compatible */ 2639 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2640 #else 2641 #define snd_pcm_oss_ioctl_compat NULL 2642 #endif 2643 2644 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2645 { 2646 struct snd_pcm_oss_file *pcm_oss_file; 2647 struct snd_pcm_substream *substream; 2648 2649 pcm_oss_file = file->private_data; 2650 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2651 if (substream == NULL) 2652 return -ENXIO; 2653 substream->f_flags = file->f_flags & O_NONBLOCK; 2654 #ifndef OSS_DEBUG 2655 return snd_pcm_oss_read1(substream, buf, count); 2656 #else 2657 { 2658 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2659 printk(KERN_DEBUG "pcm_oss: read %li bytes " 2660 "(returned %li bytes)\n", (long)count, (long)res); 2661 return res; 2662 } 2663 #endif 2664 } 2665 2666 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2667 { 2668 struct snd_pcm_oss_file *pcm_oss_file; 2669 struct snd_pcm_substream *substream; 2670 long result; 2671 2672 pcm_oss_file = file->private_data; 2673 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2674 if (substream == NULL) 2675 return -ENXIO; 2676 substream->f_flags = file->f_flags & O_NONBLOCK; 2677 result = snd_pcm_oss_write1(substream, buf, count); 2678 #ifdef OSS_DEBUG 2679 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n", 2680 (long)count, (long)result); 2681 #endif 2682 return result; 2683 } 2684 2685 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2686 { 2687 struct snd_pcm_runtime *runtime = substream->runtime; 2688 if (atomic_read(&substream->mmap_count)) 2689 return runtime->oss.prev_hw_ptr_period != 2690 get_hw_ptr_period(runtime); 2691 else 2692 return snd_pcm_playback_avail(runtime) >= 2693 runtime->oss.period_frames; 2694 } 2695 2696 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2697 { 2698 struct snd_pcm_runtime *runtime = substream->runtime; 2699 if (atomic_read(&substream->mmap_count)) 2700 return runtime->oss.prev_hw_ptr_period != 2701 get_hw_ptr_period(runtime); 2702 else 2703 return snd_pcm_capture_avail(runtime) >= 2704 runtime->oss.period_frames; 2705 } 2706 2707 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2708 { 2709 struct snd_pcm_oss_file *pcm_oss_file; 2710 unsigned int mask; 2711 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2712 2713 pcm_oss_file = file->private_data; 2714 2715 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2716 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2717 2718 mask = 0; 2719 if (psubstream != NULL) { 2720 struct snd_pcm_runtime *runtime = psubstream->runtime; 2721 poll_wait(file, &runtime->sleep, wait); 2722 snd_pcm_stream_lock_irq(psubstream); 2723 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2724 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2725 snd_pcm_oss_playback_ready(psubstream))) 2726 mask |= POLLOUT | POLLWRNORM; 2727 snd_pcm_stream_unlock_irq(psubstream); 2728 } 2729 if (csubstream != NULL) { 2730 struct snd_pcm_runtime *runtime = csubstream->runtime; 2731 snd_pcm_state_t ostate; 2732 poll_wait(file, &runtime->sleep, wait); 2733 snd_pcm_stream_lock_irq(csubstream); 2734 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2735 snd_pcm_oss_capture_ready(csubstream)) 2736 mask |= POLLIN | POLLRDNORM; 2737 snd_pcm_stream_unlock_irq(csubstream); 2738 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2739 struct snd_pcm_oss_file ofile; 2740 memset(&ofile, 0, sizeof(ofile)); 2741 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2742 runtime->oss.trigger = 0; 2743 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2744 } 2745 } 2746 2747 return mask; 2748 } 2749 2750 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2751 { 2752 struct snd_pcm_oss_file *pcm_oss_file; 2753 struct snd_pcm_substream *substream = NULL; 2754 struct snd_pcm_runtime *runtime; 2755 int err; 2756 2757 #ifdef OSS_DEBUG 2758 printk(KERN_DEBUG "pcm_oss: mmap begin\n"); 2759 #endif 2760 pcm_oss_file = file->private_data; 2761 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2762 case VM_READ | VM_WRITE: 2763 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2764 if (substream) 2765 break; 2766 /* Fall through */ 2767 case VM_READ: 2768 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2769 break; 2770 case VM_WRITE: 2771 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2772 break; 2773 default: 2774 return -EINVAL; 2775 } 2776 /* set VM_READ access as well to fix memset() routines that do 2777 reads before writes (to improve performance) */ 2778 area->vm_flags |= VM_READ; 2779 if (substream == NULL) 2780 return -ENXIO; 2781 runtime = substream->runtime; 2782 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2783 return -EIO; 2784 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2785 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2786 else 2787 return -EIO; 2788 2789 if (runtime->oss.params) { 2790 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2791 return err; 2792 } 2793 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2794 if (runtime->oss.plugin_first != NULL) 2795 return -EIO; 2796 #endif 2797 2798 if (area->vm_pgoff != 0) 2799 return -EINVAL; 2800 2801 err = snd_pcm_mmap_data(substream, file, area); 2802 if (err < 0) 2803 return err; 2804 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2805 runtime->silence_threshold = 0; 2806 runtime->silence_size = 0; 2807 #ifdef OSS_DEBUG 2808 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n", 2809 runtime->oss.mmap_bytes); 2810 #endif 2811 /* In mmap mode we never stop */ 2812 runtime->stop_threshold = runtime->boundary; 2813 2814 return 0; 2815 } 2816 2817 #ifdef CONFIG_SND_VERBOSE_PROCFS 2818 /* 2819 * /proc interface 2820 */ 2821 2822 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2823 struct snd_info_buffer *buffer) 2824 { 2825 struct snd_pcm_str *pstr = entry->private_data; 2826 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2827 mutex_lock(&pstr->oss.setup_mutex); 2828 while (setup) { 2829 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2830 setup->task_name, 2831 setup->periods, 2832 setup->period_size, 2833 setup->disable ? " disable" : "", 2834 setup->direct ? " direct" : "", 2835 setup->block ? " block" : "", 2836 setup->nonblock ? " non-block" : "", 2837 setup->partialfrag ? " partial-frag" : "", 2838 setup->nosilence ? " no-silence" : ""); 2839 setup = setup->next; 2840 } 2841 mutex_unlock(&pstr->oss.setup_mutex); 2842 } 2843 2844 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2845 { 2846 struct snd_pcm_oss_setup *setup, *setupn; 2847 2848 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2849 setup; setup = setupn) { 2850 setupn = setup->next; 2851 kfree(setup->task_name); 2852 kfree(setup); 2853 } 2854 pstr->oss.setup_list = NULL; 2855 } 2856 2857 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2858 struct snd_info_buffer *buffer) 2859 { 2860 struct snd_pcm_str *pstr = entry->private_data; 2861 char line[128], str[32], task_name[32]; 2862 const char *ptr; 2863 int idx1; 2864 struct snd_pcm_oss_setup *setup, *setup1, template; 2865 2866 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2867 mutex_lock(&pstr->oss.setup_mutex); 2868 memset(&template, 0, sizeof(template)); 2869 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2870 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2871 snd_pcm_oss_proc_free_setup_list(pstr); 2872 mutex_unlock(&pstr->oss.setup_mutex); 2873 continue; 2874 } 2875 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2876 if (!strcmp(setup->task_name, task_name)) { 2877 template = *setup; 2878 break; 2879 } 2880 } 2881 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2882 template.periods = simple_strtoul(str, NULL, 10); 2883 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2884 template.period_size = simple_strtoul(str, NULL, 10); 2885 for (idx1 = 31; idx1 >= 0; idx1--) 2886 if (template.period_size & (1 << idx1)) 2887 break; 2888 for (idx1--; idx1 >= 0; idx1--) 2889 template.period_size &= ~(1 << idx1); 2890 do { 2891 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2892 if (!strcmp(str, "disable")) { 2893 template.disable = 1; 2894 } else if (!strcmp(str, "direct")) { 2895 template.direct = 1; 2896 } else if (!strcmp(str, "block")) { 2897 template.block = 1; 2898 } else if (!strcmp(str, "non-block")) { 2899 template.nonblock = 1; 2900 } else if (!strcmp(str, "partial-frag")) { 2901 template.partialfrag = 1; 2902 } else if (!strcmp(str, "no-silence")) { 2903 template.nosilence = 1; 2904 } else if (!strcmp(str, "buggy-ptr")) { 2905 template.buggyptr = 1; 2906 } 2907 } while (*str); 2908 if (setup == NULL) { 2909 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2910 if (! setup) { 2911 buffer->error = -ENOMEM; 2912 mutex_unlock(&pstr->oss.setup_mutex); 2913 return; 2914 } 2915 if (pstr->oss.setup_list == NULL) 2916 pstr->oss.setup_list = setup; 2917 else { 2918 for (setup1 = pstr->oss.setup_list; 2919 setup1->next; setup1 = setup1->next); 2920 setup1->next = setup; 2921 } 2922 template.task_name = kstrdup(task_name, GFP_KERNEL); 2923 if (! template.task_name) { 2924 kfree(setup); 2925 buffer->error = -ENOMEM; 2926 mutex_unlock(&pstr->oss.setup_mutex); 2927 return; 2928 } 2929 } 2930 *setup = template; 2931 mutex_unlock(&pstr->oss.setup_mutex); 2932 } 2933 } 2934 2935 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2936 { 2937 int stream; 2938 for (stream = 0; stream < 2; ++stream) { 2939 struct snd_info_entry *entry; 2940 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2941 if (pstr->substream_count == 0) 2942 continue; 2943 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2944 entry->content = SNDRV_INFO_CONTENT_TEXT; 2945 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2946 entry->c.text.read = snd_pcm_oss_proc_read; 2947 entry->c.text.write = snd_pcm_oss_proc_write; 2948 entry->private_data = pstr; 2949 if (snd_info_register(entry) < 0) { 2950 snd_info_free_entry(entry); 2951 entry = NULL; 2952 } 2953 } 2954 pstr->oss.proc_entry = entry; 2955 } 2956 } 2957 2958 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2959 { 2960 int stream; 2961 for (stream = 0; stream < 2; ++stream) { 2962 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2963 snd_info_free_entry(pstr->oss.proc_entry); 2964 pstr->oss.proc_entry = NULL; 2965 snd_pcm_oss_proc_free_setup_list(pstr); 2966 } 2967 } 2968 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2969 #define snd_pcm_oss_proc_init(pcm) 2970 #define snd_pcm_oss_proc_done(pcm) 2971 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2972 2973 /* 2974 * ENTRY functions 2975 */ 2976 2977 static const struct file_operations snd_pcm_oss_f_reg = 2978 { 2979 .owner = THIS_MODULE, 2980 .read = snd_pcm_oss_read, 2981 .write = snd_pcm_oss_write, 2982 .open = snd_pcm_oss_open, 2983 .release = snd_pcm_oss_release, 2984 .llseek = no_llseek, 2985 .poll = snd_pcm_oss_poll, 2986 .unlocked_ioctl = snd_pcm_oss_ioctl, 2987 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2988 .mmap = snd_pcm_oss_mmap, 2989 }; 2990 2991 static void register_oss_dsp(struct snd_pcm *pcm, int index) 2992 { 2993 char name[128]; 2994 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2995 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2996 pcm->card, index, &snd_pcm_oss_f_reg, 2997 pcm, name) < 0) { 2998 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 2999 pcm->card->number, pcm->device); 3000 } 3001 } 3002 3003 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3004 { 3005 pcm->oss.reg = 0; 3006 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3007 char name[128]; 3008 int duplex; 3009 register_oss_dsp(pcm, 0); 3010 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3011 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3012 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3013 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3014 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3015 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3016 pcm->card->number, 3017 name); 3018 #endif 3019 pcm->oss.reg++; 3020 pcm->oss.reg_mask |= 1; 3021 } 3022 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3023 register_oss_dsp(pcm, 1); 3024 pcm->oss.reg++; 3025 pcm->oss.reg_mask |= 2; 3026 } 3027 3028 if (pcm->oss.reg) 3029 snd_pcm_oss_proc_init(pcm); 3030 3031 return 0; 3032 } 3033 3034 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3035 { 3036 if (pcm->oss.reg) { 3037 if (pcm->oss.reg_mask & 1) { 3038 pcm->oss.reg_mask &= ~1; 3039 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3040 pcm->card, 0); 3041 } 3042 if (pcm->oss.reg_mask & 2) { 3043 pcm->oss.reg_mask &= ~2; 3044 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3045 pcm->card, 1); 3046 } 3047 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3048 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3049 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3050 #endif 3051 } 3052 pcm->oss.reg = 0; 3053 } 3054 return 0; 3055 } 3056 3057 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3058 { 3059 snd_pcm_oss_disconnect_minor(pcm); 3060 snd_pcm_oss_proc_done(pcm); 3061 return 0; 3062 } 3063 3064 static struct snd_pcm_notify snd_pcm_oss_notify = 3065 { 3066 .n_register = snd_pcm_oss_register_minor, 3067 .n_disconnect = snd_pcm_oss_disconnect_minor, 3068 .n_unregister = snd_pcm_oss_unregister_minor, 3069 }; 3070 3071 static int __init alsa_pcm_oss_init(void) 3072 { 3073 int i; 3074 int err; 3075 3076 /* check device map table */ 3077 for (i = 0; i < SNDRV_CARDS; i++) { 3078 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3079 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 3080 i, dsp_map[i]); 3081 dsp_map[i] = 0; 3082 } 3083 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3084 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 3085 i, adsp_map[i]); 3086 adsp_map[i] = 1; 3087 } 3088 } 3089 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3090 return err; 3091 return 0; 3092 } 3093 3094 static void __exit alsa_pcm_oss_exit(void) 3095 { 3096 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3097 } 3098 3099 module_init(alsa_pcm_oss_init) 3100 module_exit(alsa_pcm_oss_exit) 3101