1 /* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #if 0 23 #define PLUGIN_DEBUG 24 #endif 25 #if 0 26 #define OSS_DEBUG 27 #endif 28 29 #include <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/time.h> 32 #include <linux/vmalloc.h> 33 #include <linux/module.h> 34 #include <linux/math64.h> 35 #include <linux/string.h> 36 #include <sound/core.h> 37 #include <sound/minors.h> 38 #include <sound/pcm.h> 39 #include <sound/pcm_params.h> 40 #include "pcm_plugin.h" 41 #include <sound/info.h> 42 #include <linux/soundcard.h> 43 #include <sound/initval.h> 44 #include <sound/mixer_oss.h> 45 46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 47 48 static int dsp_map[SNDRV_CARDS]; 49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 50 static bool nonblock_open = 1; 51 52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 54 MODULE_LICENSE("GPL"); 55 module_param_array(dsp_map, int, NULL, 0444); 56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 57 module_param_array(adsp_map, int, NULL, 0444); 58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 59 module_param(nonblock_open, bool, 0644); 60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 63 64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 67 68 static inline mm_segment_t snd_enter_user(void) 69 { 70 mm_segment_t fs = get_fs(); 71 set_fs(get_ds()); 72 return fs; 73 } 74 75 static inline void snd_leave_user(mm_segment_t fs) 76 { 77 set_fs(fs); 78 } 79 80 /* 81 * helper functions to process hw_params 82 */ 83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 84 { 85 int changed = 0; 86 if (i->min < min) { 87 i->min = min; 88 i->openmin = openmin; 89 changed = 1; 90 } else if (i->min == min && !i->openmin && openmin) { 91 i->openmin = 1; 92 changed = 1; 93 } 94 if (i->integer) { 95 if (i->openmin) { 96 i->min++; 97 i->openmin = 0; 98 } 99 } 100 if (snd_interval_checkempty(i)) { 101 snd_interval_none(i); 102 return -EINVAL; 103 } 104 return changed; 105 } 106 107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 108 { 109 int changed = 0; 110 if (i->max > max) { 111 i->max = max; 112 i->openmax = openmax; 113 changed = 1; 114 } else if (i->max == max && !i->openmax && openmax) { 115 i->openmax = 1; 116 changed = 1; 117 } 118 if (i->integer) { 119 if (i->openmax) { 120 i->max--; 121 i->openmax = 0; 122 } 123 } 124 if (snd_interval_checkempty(i)) { 125 snd_interval_none(i); 126 return -EINVAL; 127 } 128 return changed; 129 } 130 131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 132 { 133 struct snd_interval t; 134 t.empty = 0; 135 t.min = t.max = val; 136 t.openmin = t.openmax = 0; 137 t.integer = 1; 138 return snd_interval_refine(i, &t); 139 } 140 141 /** 142 * snd_pcm_hw_param_value_min 143 * @params: the hw_params instance 144 * @var: parameter to retrieve 145 * @dir: pointer to the direction (-1,0,1) or NULL 146 * 147 * Return the minimum value for field PAR. 148 */ 149 static unsigned int 150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 151 snd_pcm_hw_param_t var, int *dir) 152 { 153 if (hw_is_mask(var)) { 154 if (dir) 155 *dir = 0; 156 return snd_mask_min(hw_param_mask_c(params, var)); 157 } 158 if (hw_is_interval(var)) { 159 const struct snd_interval *i = hw_param_interval_c(params, var); 160 if (dir) 161 *dir = i->openmin; 162 return snd_interval_min(i); 163 } 164 return -EINVAL; 165 } 166 167 /** 168 * snd_pcm_hw_param_value_max 169 * @params: the hw_params instance 170 * @var: parameter to retrieve 171 * @dir: pointer to the direction (-1,0,1) or NULL 172 * 173 * Return the maximum value for field PAR. 174 */ 175 static unsigned int 176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 177 snd_pcm_hw_param_t var, int *dir) 178 { 179 if (hw_is_mask(var)) { 180 if (dir) 181 *dir = 0; 182 return snd_mask_max(hw_param_mask_c(params, var)); 183 } 184 if (hw_is_interval(var)) { 185 const struct snd_interval *i = hw_param_interval_c(params, var); 186 if (dir) 187 *dir = - (int) i->openmax; 188 return snd_interval_max(i); 189 } 190 return -EINVAL; 191 } 192 193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 194 snd_pcm_hw_param_t var, 195 const struct snd_mask *val) 196 { 197 int changed; 198 changed = snd_mask_refine(hw_param_mask(params, var), val); 199 if (changed) { 200 params->cmask |= 1 << var; 201 params->rmask |= 1 << var; 202 } 203 return changed; 204 } 205 206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 207 struct snd_pcm_hw_params *params, 208 snd_pcm_hw_param_t var, 209 const struct snd_mask *val) 210 { 211 int changed = _snd_pcm_hw_param_mask(params, var, val); 212 if (changed < 0) 213 return changed; 214 if (params->rmask) { 215 int err = snd_pcm_hw_refine(pcm, params); 216 if (err < 0) 217 return err; 218 } 219 return 0; 220 } 221 222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 223 snd_pcm_hw_param_t var, unsigned int val, 224 int dir) 225 { 226 int changed; 227 int open = 0; 228 if (dir) { 229 if (dir > 0) { 230 open = 1; 231 } else if (dir < 0) { 232 if (val > 0) { 233 open = 1; 234 val--; 235 } 236 } 237 } 238 if (hw_is_mask(var)) 239 changed = snd_mask_refine_min(hw_param_mask(params, var), 240 val + !!open); 241 else if (hw_is_interval(var)) 242 changed = snd_interval_refine_min(hw_param_interval(params, var), 243 val, open); 244 else 245 return -EINVAL; 246 if (changed) { 247 params->cmask |= 1 << var; 248 params->rmask |= 1 << var; 249 } 250 return changed; 251 } 252 253 /** 254 * snd_pcm_hw_param_min 255 * @pcm: PCM instance 256 * @params: the hw_params instance 257 * @var: parameter to retrieve 258 * @val: minimal value 259 * @dir: pointer to the direction (-1,0,1) or NULL 260 * 261 * Inside configuration space defined by PARAMS remove from PAR all 262 * values < VAL. Reduce configuration space accordingly. 263 * Return new minimum or -EINVAL if the configuration space is empty 264 */ 265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 266 struct snd_pcm_hw_params *params, 267 snd_pcm_hw_param_t var, unsigned int val, 268 int *dir) 269 { 270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 271 if (changed < 0) 272 return changed; 273 if (params->rmask) { 274 int err = snd_pcm_hw_refine(pcm, params); 275 if (err < 0) 276 return err; 277 } 278 return snd_pcm_hw_param_value_min(params, var, dir); 279 } 280 281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 282 snd_pcm_hw_param_t var, unsigned int val, 283 int dir) 284 { 285 int changed; 286 int open = 0; 287 if (dir) { 288 if (dir < 0) { 289 open = 1; 290 } else if (dir > 0) { 291 open = 1; 292 val++; 293 } 294 } 295 if (hw_is_mask(var)) { 296 if (val == 0 && open) { 297 snd_mask_none(hw_param_mask(params, var)); 298 changed = -EINVAL; 299 } else 300 changed = snd_mask_refine_max(hw_param_mask(params, var), 301 val - !!open); 302 } else if (hw_is_interval(var)) 303 changed = snd_interval_refine_max(hw_param_interval(params, var), 304 val, open); 305 else 306 return -EINVAL; 307 if (changed) { 308 params->cmask |= 1 << var; 309 params->rmask |= 1 << var; 310 } 311 return changed; 312 } 313 314 /** 315 * snd_pcm_hw_param_max 316 * @pcm: PCM instance 317 * @params: the hw_params instance 318 * @var: parameter to retrieve 319 * @val: maximal value 320 * @dir: pointer to the direction (-1,0,1) or NULL 321 * 322 * Inside configuration space defined by PARAMS remove from PAR all 323 * values >= VAL + 1. Reduce configuration space accordingly. 324 * Return new maximum or -EINVAL if the configuration space is empty 325 */ 326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 327 struct snd_pcm_hw_params *params, 328 snd_pcm_hw_param_t var, unsigned int val, 329 int *dir) 330 { 331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 332 if (changed < 0) 333 return changed; 334 if (params->rmask) { 335 int err = snd_pcm_hw_refine(pcm, params); 336 if (err < 0) 337 return err; 338 } 339 return snd_pcm_hw_param_value_max(params, var, dir); 340 } 341 342 static int boundary_sub(int a, int adir, 343 int b, int bdir, 344 int *c, int *cdir) 345 { 346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 348 *c = a - b; 349 *cdir = adir - bdir; 350 if (*cdir == -2) { 351 (*c)--; 352 } else if (*cdir == 2) { 353 (*c)++; 354 } 355 return 0; 356 } 357 358 static int boundary_lt(unsigned int a, int adir, 359 unsigned int b, int bdir) 360 { 361 if (adir < 0) { 362 a--; 363 adir = 1; 364 } else if (adir > 0) 365 adir = 1; 366 if (bdir < 0) { 367 b--; 368 bdir = 1; 369 } else if (bdir > 0) 370 bdir = 1; 371 return a < b || (a == b && adir < bdir); 372 } 373 374 /* Return 1 if min is nearer to best than max */ 375 static int boundary_nearer(int min, int mindir, 376 int best, int bestdir, 377 int max, int maxdir) 378 { 379 int dmin, dmindir; 380 int dmax, dmaxdir; 381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 383 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 384 } 385 386 /** 387 * snd_pcm_hw_param_near 388 * @pcm: PCM instance 389 * @params: the hw_params instance 390 * @var: parameter to retrieve 391 * @best: value to set 392 * @dir: pointer to the direction (-1,0,1) or NULL 393 * 394 * Inside configuration space defined by PARAMS set PAR to the available value 395 * nearest to VAL. Reduce configuration space accordingly. 396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 398 * Return the value found. 399 */ 400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 401 struct snd_pcm_hw_params *params, 402 snd_pcm_hw_param_t var, unsigned int best, 403 int *dir) 404 { 405 struct snd_pcm_hw_params *save = NULL; 406 int v; 407 unsigned int saved_min; 408 int last = 0; 409 int min, max; 410 int mindir, maxdir; 411 int valdir = dir ? *dir : 0; 412 /* FIXME */ 413 if (best > INT_MAX) 414 best = INT_MAX; 415 min = max = best; 416 mindir = maxdir = valdir; 417 if (maxdir > 0) 418 maxdir = 0; 419 else if (maxdir == 0) 420 maxdir = -1; 421 else { 422 maxdir = 1; 423 max--; 424 } 425 save = kmalloc(sizeof(*save), GFP_KERNEL); 426 if (save == NULL) 427 return -ENOMEM; 428 *save = *params; 429 saved_min = min; 430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 431 if (min >= 0) { 432 struct snd_pcm_hw_params *params1; 433 if (max < 0) 434 goto _end; 435 if ((unsigned int)min == saved_min && mindir == valdir) 436 goto _end; 437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 438 if (params1 == NULL) { 439 kfree(save); 440 return -ENOMEM; 441 } 442 *params1 = *save; 443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 444 if (max < 0) { 445 kfree(params1); 446 goto _end; 447 } 448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 449 *params = *params1; 450 last = 1; 451 } 452 kfree(params1); 453 } else { 454 *params = *save; 455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 456 if (max < 0) { 457 kfree(save); 458 return max; 459 } 460 last = 1; 461 } 462 _end: 463 kfree(save); 464 if (last) 465 v = snd_pcm_hw_param_last(pcm, params, var, dir); 466 else 467 v = snd_pcm_hw_param_first(pcm, params, var, dir); 468 snd_BUG_ON(v < 0); 469 return v; 470 } 471 472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 473 snd_pcm_hw_param_t var, unsigned int val, 474 int dir) 475 { 476 int changed; 477 if (hw_is_mask(var)) { 478 struct snd_mask *m = hw_param_mask(params, var); 479 if (val == 0 && dir < 0) { 480 changed = -EINVAL; 481 snd_mask_none(m); 482 } else { 483 if (dir > 0) 484 val++; 485 else if (dir < 0) 486 val--; 487 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 488 } 489 } else if (hw_is_interval(var)) { 490 struct snd_interval *i = hw_param_interval(params, var); 491 if (val == 0 && dir < 0) { 492 changed = -EINVAL; 493 snd_interval_none(i); 494 } else if (dir == 0) 495 changed = snd_interval_refine_set(i, val); 496 else { 497 struct snd_interval t; 498 t.openmin = 1; 499 t.openmax = 1; 500 t.empty = 0; 501 t.integer = 0; 502 if (dir < 0) { 503 t.min = val - 1; 504 t.max = val; 505 } else { 506 t.min = val; 507 t.max = val+1; 508 } 509 changed = snd_interval_refine(i, &t); 510 } 511 } else 512 return -EINVAL; 513 if (changed) { 514 params->cmask |= 1 << var; 515 params->rmask |= 1 << var; 516 } 517 return changed; 518 } 519 520 /** 521 * snd_pcm_hw_param_set 522 * @pcm: PCM instance 523 * @params: the hw_params instance 524 * @var: parameter to retrieve 525 * @val: value to set 526 * @dir: pointer to the direction (-1,0,1) or NULL 527 * 528 * Inside configuration space defined by PARAMS remove from PAR all 529 * values != VAL. Reduce configuration space accordingly. 530 * Return VAL or -EINVAL if the configuration space is empty 531 */ 532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 533 struct snd_pcm_hw_params *params, 534 snd_pcm_hw_param_t var, unsigned int val, 535 int dir) 536 { 537 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 538 if (changed < 0) 539 return changed; 540 if (params->rmask) { 541 int err = snd_pcm_hw_refine(pcm, params); 542 if (err < 0) 543 return err; 544 } 545 return snd_pcm_hw_param_value(params, var, NULL); 546 } 547 548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 549 snd_pcm_hw_param_t var) 550 { 551 int changed; 552 changed = snd_interval_setinteger(hw_param_interval(params, var)); 553 if (changed) { 554 params->cmask |= 1 << var; 555 params->rmask |= 1 << var; 556 } 557 return changed; 558 } 559 560 /* 561 * plugin 562 */ 563 564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 566 { 567 struct snd_pcm_runtime *runtime = substream->runtime; 568 struct snd_pcm_plugin *plugin, *next; 569 570 plugin = runtime->oss.plugin_first; 571 while (plugin) { 572 next = plugin->next; 573 snd_pcm_plugin_free(plugin); 574 plugin = next; 575 } 576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 577 return 0; 578 } 579 580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 581 { 582 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 583 plugin->next = runtime->oss.plugin_first; 584 plugin->prev = NULL; 585 if (runtime->oss.plugin_first) { 586 runtime->oss.plugin_first->prev = plugin; 587 runtime->oss.plugin_first = plugin; 588 } else { 589 runtime->oss.plugin_last = 590 runtime->oss.plugin_first = plugin; 591 } 592 return 0; 593 } 594 595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 596 { 597 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 598 plugin->next = NULL; 599 plugin->prev = runtime->oss.plugin_last; 600 if (runtime->oss.plugin_last) { 601 runtime->oss.plugin_last->next = plugin; 602 runtime->oss.plugin_last = plugin; 603 } else { 604 runtime->oss.plugin_last = 605 runtime->oss.plugin_first = plugin; 606 } 607 return 0; 608 } 609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 610 611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 612 { 613 struct snd_pcm_runtime *runtime = substream->runtime; 614 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 615 long bytes = frames_to_bytes(runtime, frames); 616 if (buffer_size == runtime->oss.buffer_bytes) 617 return bytes; 618 #if BITS_PER_LONG >= 64 619 return runtime->oss.buffer_bytes * bytes / buffer_size; 620 #else 621 { 622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 623 return div_u64(bsize, buffer_size); 624 } 625 #endif 626 } 627 628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 629 { 630 struct snd_pcm_runtime *runtime = substream->runtime; 631 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 632 if (buffer_size == runtime->oss.buffer_bytes) 633 return bytes_to_frames(runtime, bytes); 634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 635 } 636 637 static inline 638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 639 { 640 return runtime->hw_ptr_interrupt; 641 } 642 643 /* define extended formats in the recent OSS versions (if any) */ 644 /* linear formats */ 645 #define AFMT_S32_LE 0x00001000 646 #define AFMT_S32_BE 0x00002000 647 #define AFMT_S24_LE 0x00008000 648 #define AFMT_S24_BE 0x00010000 649 #define AFMT_S24_PACKED 0x00040000 650 651 /* other supported formats */ 652 #define AFMT_FLOAT 0x00004000 653 #define AFMT_SPDIF_RAW 0x00020000 654 655 /* unsupported formats */ 656 #define AFMT_AC3 0x00000400 657 #define AFMT_VORBIS 0x00000800 658 659 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 660 { 661 switch (format) { 662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 679 default: return SNDRV_PCM_FORMAT_U8; 680 } 681 } 682 683 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 684 { 685 switch (format) { 686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 703 default: return -EINVAL; 704 } 705 } 706 707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 708 struct snd_pcm_hw_params *oss_params, 709 struct snd_pcm_hw_params *slave_params) 710 { 711 size_t s; 712 size_t oss_buffer_size, oss_period_size, oss_periods; 713 size_t min_period_size, max_period_size; 714 struct snd_pcm_runtime *runtime = substream->runtime; 715 size_t oss_frame_size; 716 717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 718 params_channels(oss_params) / 8; 719 720 oss_buffer_size = snd_pcm_plug_client_size(substream, 721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 722 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 723 if (atomic_read(&substream->mmap_count)) { 724 if (oss_buffer_size > runtime->oss.mmap_bytes) 725 oss_buffer_size = runtime->oss.mmap_bytes; 726 } 727 728 if (substream->oss.setup.period_size > 16) 729 oss_period_size = substream->oss.setup.period_size; 730 else if (runtime->oss.fragshift) { 731 oss_period_size = 1 << runtime->oss.fragshift; 732 if (oss_period_size > oss_buffer_size / 2) 733 oss_period_size = oss_buffer_size / 2; 734 } else { 735 int sd; 736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 737 738 oss_period_size = oss_buffer_size; 739 do { 740 oss_period_size /= 2; 741 } while (oss_period_size > bytes_per_sec); 742 if (runtime->oss.subdivision == 0) { 743 sd = 4; 744 if (oss_period_size / sd > 4096) 745 sd *= 2; 746 if (oss_period_size / sd < 4096) 747 sd = 1; 748 } else 749 sd = runtime->oss.subdivision; 750 oss_period_size /= sd; 751 if (oss_period_size < 16) 752 oss_period_size = 16; 753 } 754 755 min_period_size = snd_pcm_plug_client_size(substream, 756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 757 min_period_size *= oss_frame_size; 758 min_period_size = roundup_pow_of_two(min_period_size); 759 if (oss_period_size < min_period_size) 760 oss_period_size = min_period_size; 761 762 max_period_size = snd_pcm_plug_client_size(substream, 763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 764 max_period_size *= oss_frame_size; 765 max_period_size = rounddown_pow_of_two(max_period_size); 766 if (oss_period_size > max_period_size) 767 oss_period_size = max_period_size; 768 769 oss_periods = oss_buffer_size / oss_period_size; 770 771 if (substream->oss.setup.periods > 1) 772 oss_periods = substream->oss.setup.periods; 773 774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 776 s = runtime->oss.maxfrags; 777 if (oss_periods > s) 778 oss_periods = s; 779 780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 781 if (s < 2) 782 s = 2; 783 if (oss_periods < s) 784 oss_periods = s; 785 786 while (oss_period_size * oss_periods > oss_buffer_size) 787 oss_period_size /= 2; 788 789 if (oss_period_size < 16) 790 return -EINVAL; 791 runtime->oss.period_bytes = oss_period_size; 792 runtime->oss.period_frames = 1; 793 runtime->oss.periods = oss_periods; 794 return 0; 795 } 796 797 static int choose_rate(struct snd_pcm_substream *substream, 798 struct snd_pcm_hw_params *params, unsigned int best_rate) 799 { 800 struct snd_interval *it; 801 struct snd_pcm_hw_params *save; 802 unsigned int rate, prev; 803 804 save = kmalloc(sizeof(*save), GFP_KERNEL); 805 if (save == NULL) 806 return -ENOMEM; 807 *save = *params; 808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 809 810 /* try multiples of the best rate */ 811 rate = best_rate; 812 for (;;) { 813 if (it->max < rate || (it->max == rate && it->openmax)) 814 break; 815 if (it->min < rate || (it->min == rate && !it->openmin)) { 816 int ret; 817 ret = snd_pcm_hw_param_set(substream, params, 818 SNDRV_PCM_HW_PARAM_RATE, 819 rate, 0); 820 if (ret == (int)rate) { 821 kfree(save); 822 return rate; 823 } 824 *params = *save; 825 } 826 prev = rate; 827 rate += best_rate; 828 if (rate <= prev) 829 break; 830 } 831 832 /* not found, use the nearest rate */ 833 kfree(save); 834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 835 } 836 837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 838 { 839 struct snd_pcm_runtime *runtime = substream->runtime; 840 struct snd_pcm_hw_params *params, *sparams; 841 struct snd_pcm_sw_params *sw_params; 842 ssize_t oss_buffer_size, oss_period_size; 843 size_t oss_frame_size; 844 int err; 845 int direct; 846 snd_pcm_format_t format, sformat; 847 int n; 848 struct snd_mask sformat_mask; 849 struct snd_mask mask; 850 851 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 852 return -EINTR; 853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 854 params = kmalloc(sizeof(*params), GFP_KERNEL); 855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 856 if (!sw_params || !params || !sparams) { 857 pcm_dbg(substream->pcm, "No memory\n"); 858 err = -ENOMEM; 859 goto failure; 860 } 861 862 if (atomic_read(&substream->mmap_count)) 863 direct = 1; 864 else 865 direct = substream->oss.setup.direct; 866 867 _snd_pcm_hw_params_any(sparams); 868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 870 snd_mask_none(&mask); 871 if (atomic_read(&substream->mmap_count)) 872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 873 else { 874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 875 if (!direct) 876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 877 } 878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 879 if (err < 0) { 880 pcm_dbg(substream->pcm, "No usable accesses\n"); 881 err = -EINVAL; 882 goto failure; 883 } 884 choose_rate(substream, sparams, runtime->oss.rate); 885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 886 887 format = snd_pcm_oss_format_from(runtime->oss.format); 888 889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 890 if (direct) 891 sformat = format; 892 else 893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 894 895 if ((__force int)sformat < 0 || 896 !snd_mask_test(&sformat_mask, (__force int)sformat)) { 897 for (sformat = (__force snd_pcm_format_t)0; 898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 900 if (snd_mask_test(&sformat_mask, (__force int)sformat) && 901 snd_pcm_oss_format_to(sformat) >= 0) 902 break; 903 } 904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 905 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 906 err = -EINVAL; 907 goto failure; 908 } 909 } 910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 911 if (err < 0) 912 goto failure; 913 914 if (direct) { 915 memcpy(params, sparams, sizeof(*params)); 916 } else { 917 _snd_pcm_hw_params_any(params); 918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 923 runtime->oss.channels, 0); 924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 925 runtime->oss.rate, 0); 926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 927 params_access(params), params_format(params), 928 params_channels(params), params_rate(params)); 929 } 930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 931 params_access(sparams), params_format(sparams), 932 params_channels(sparams), params_rate(sparams)); 933 934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 935 params_channels(params) / 8; 936 937 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 938 snd_pcm_oss_plugin_clear(substream); 939 if (!direct) { 940 /* add necessary plugins */ 941 snd_pcm_oss_plugin_clear(substream); 942 if ((err = snd_pcm_plug_format_plugins(substream, 943 params, 944 sparams)) < 0) { 945 pcm_dbg(substream->pcm, 946 "snd_pcm_plug_format_plugins failed: %i\n", err); 947 snd_pcm_oss_plugin_clear(substream); 948 goto failure; 949 } 950 if (runtime->oss.plugin_first) { 951 struct snd_pcm_plugin *plugin; 952 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 953 pcm_dbg(substream->pcm, 954 "snd_pcm_plugin_build_io failed: %i\n", err); 955 snd_pcm_oss_plugin_clear(substream); 956 goto failure; 957 } 958 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 959 err = snd_pcm_plugin_append(plugin); 960 } else { 961 err = snd_pcm_plugin_insert(plugin); 962 } 963 if (err < 0) { 964 snd_pcm_oss_plugin_clear(substream); 965 goto failure; 966 } 967 } 968 } 969 #endif 970 971 err = snd_pcm_oss_period_size(substream, params, sparams); 972 if (err < 0) 973 goto failure; 974 975 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 976 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 977 if (err < 0) 978 goto failure; 979 980 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 981 runtime->oss.periods, NULL); 982 if (err < 0) 983 goto failure; 984 985 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 986 987 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 988 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 989 goto failure; 990 } 991 992 memset(sw_params, 0, sizeof(*sw_params)); 993 if (runtime->oss.trigger) { 994 sw_params->start_threshold = 1; 995 } else { 996 sw_params->start_threshold = runtime->boundary; 997 } 998 if (atomic_read(&substream->mmap_count) || 999 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1000 sw_params->stop_threshold = runtime->boundary; 1001 else 1002 sw_params->stop_threshold = runtime->buffer_size; 1003 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1004 sw_params->period_step = 1; 1005 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1006 1 : runtime->period_size; 1007 if (atomic_read(&substream->mmap_count) || 1008 substream->oss.setup.nosilence) { 1009 sw_params->silence_threshold = 0; 1010 sw_params->silence_size = 0; 1011 } else { 1012 snd_pcm_uframes_t frames; 1013 frames = runtime->period_size + 16; 1014 if (frames > runtime->buffer_size) 1015 frames = runtime->buffer_size; 1016 sw_params->silence_threshold = frames; 1017 sw_params->silence_size = frames; 1018 } 1019 1020 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1021 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1022 goto failure; 1023 } 1024 1025 runtime->oss.periods = params_periods(sparams); 1026 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1027 if (oss_period_size < 0) { 1028 err = -EINVAL; 1029 goto failure; 1030 } 1031 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1032 if (runtime->oss.plugin_first) { 1033 err = snd_pcm_plug_alloc(substream, oss_period_size); 1034 if (err < 0) 1035 goto failure; 1036 } 1037 #endif 1038 oss_period_size *= oss_frame_size; 1039 1040 oss_buffer_size = oss_period_size * runtime->oss.periods; 1041 if (oss_buffer_size < 0) { 1042 err = -EINVAL; 1043 goto failure; 1044 } 1045 1046 runtime->oss.period_bytes = oss_period_size; 1047 runtime->oss.buffer_bytes = oss_buffer_size; 1048 1049 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1050 runtime->oss.period_bytes, 1051 runtime->oss.buffer_bytes); 1052 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1053 params_period_size(sparams), 1054 params_buffer_size(sparams)); 1055 1056 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1057 runtime->oss.channels = params_channels(params); 1058 runtime->oss.rate = params_rate(params); 1059 1060 vfree(runtime->oss.buffer); 1061 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1062 if (!runtime->oss.buffer) { 1063 err = -ENOMEM; 1064 goto failure; 1065 } 1066 1067 runtime->oss.params = 0; 1068 runtime->oss.prepare = 1; 1069 runtime->oss.buffer_used = 0; 1070 if (runtime->dma_area) 1071 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1072 1073 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1074 1075 err = 0; 1076 failure: 1077 kfree(sw_params); 1078 kfree(params); 1079 kfree(sparams); 1080 mutex_unlock(&runtime->oss.params_lock); 1081 return err; 1082 } 1083 1084 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1085 { 1086 int idx, err; 1087 struct snd_pcm_substream *asubstream = NULL, *substream; 1088 1089 for (idx = 0; idx < 2; idx++) { 1090 substream = pcm_oss_file->streams[idx]; 1091 if (substream == NULL) 1092 continue; 1093 if (asubstream == NULL) 1094 asubstream = substream; 1095 if (substream->runtime->oss.params) { 1096 err = snd_pcm_oss_change_params(substream); 1097 if (err < 0) 1098 return err; 1099 } 1100 } 1101 if (!asubstream) 1102 return -EIO; 1103 if (r_substream) 1104 *r_substream = asubstream; 1105 return 0; 1106 } 1107 1108 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1109 { 1110 int err; 1111 struct snd_pcm_runtime *runtime = substream->runtime; 1112 1113 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1114 if (err < 0) { 1115 pcm_dbg(substream->pcm, 1116 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1117 return err; 1118 } 1119 runtime->oss.prepare = 0; 1120 runtime->oss.prev_hw_ptr_period = 0; 1121 runtime->oss.period_ptr = 0; 1122 runtime->oss.buffer_used = 0; 1123 1124 return 0; 1125 } 1126 1127 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1128 { 1129 struct snd_pcm_runtime *runtime; 1130 int err; 1131 1132 if (substream == NULL) 1133 return 0; 1134 runtime = substream->runtime; 1135 if (runtime->oss.params) { 1136 err = snd_pcm_oss_change_params(substream); 1137 if (err < 0) 1138 return err; 1139 } 1140 if (runtime->oss.prepare) { 1141 err = snd_pcm_oss_prepare(substream); 1142 if (err < 0) 1143 return err; 1144 } 1145 return 0; 1146 } 1147 1148 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1149 { 1150 struct snd_pcm_runtime *runtime; 1151 snd_pcm_uframes_t frames; 1152 int err = 0; 1153 1154 while (1) { 1155 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1156 if (err < 0) 1157 break; 1158 runtime = substream->runtime; 1159 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1160 break; 1161 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1162 /* until avail(delay) <= buffer_size */ 1163 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1164 frames /= runtime->period_size; 1165 frames *= runtime->period_size; 1166 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1167 if (err < 0) 1168 break; 1169 } 1170 return err; 1171 } 1172 1173 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1174 { 1175 struct snd_pcm_runtime *runtime = substream->runtime; 1176 int ret; 1177 while (1) { 1178 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1179 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1180 #ifdef OSS_DEBUG 1181 pcm_dbg(substream->pcm, 1182 "pcm_oss: write: recovering from %s\n", 1183 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1184 "XRUN" : "SUSPEND"); 1185 #endif 1186 ret = snd_pcm_oss_prepare(substream); 1187 if (ret < 0) 1188 break; 1189 } 1190 if (in_kernel) { 1191 mm_segment_t fs; 1192 fs = snd_enter_user(); 1193 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1194 snd_leave_user(fs); 1195 } else { 1196 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1197 } 1198 if (ret != -EPIPE && ret != -ESTRPIPE) 1199 break; 1200 /* test, if we can't store new data, because the stream */ 1201 /* has not been started */ 1202 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1203 return -EAGAIN; 1204 } 1205 return ret; 1206 } 1207 1208 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1209 { 1210 struct snd_pcm_runtime *runtime = substream->runtime; 1211 snd_pcm_sframes_t delay; 1212 int ret; 1213 while (1) { 1214 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1215 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1216 #ifdef OSS_DEBUG 1217 pcm_dbg(substream->pcm, 1218 "pcm_oss: read: recovering from %s\n", 1219 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1220 "XRUN" : "SUSPEND"); 1221 #endif 1222 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1223 if (ret < 0) 1224 break; 1225 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1226 ret = snd_pcm_oss_prepare(substream); 1227 if (ret < 0) 1228 break; 1229 } 1230 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1231 if (ret < 0) 1232 break; 1233 if (in_kernel) { 1234 mm_segment_t fs; 1235 fs = snd_enter_user(); 1236 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1237 snd_leave_user(fs); 1238 } else { 1239 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1240 } 1241 if (ret == -EPIPE) { 1242 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1243 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1244 if (ret < 0) 1245 break; 1246 } 1247 continue; 1248 } 1249 if (ret != -ESTRPIPE) 1250 break; 1251 } 1252 return ret; 1253 } 1254 1255 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1256 { 1257 struct snd_pcm_runtime *runtime = substream->runtime; 1258 int ret; 1259 while (1) { 1260 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1261 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1262 #ifdef OSS_DEBUG 1263 pcm_dbg(substream->pcm, 1264 "pcm_oss: writev: recovering from %s\n", 1265 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1266 "XRUN" : "SUSPEND"); 1267 #endif 1268 ret = snd_pcm_oss_prepare(substream); 1269 if (ret < 0) 1270 break; 1271 } 1272 if (in_kernel) { 1273 mm_segment_t fs; 1274 fs = snd_enter_user(); 1275 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1276 snd_leave_user(fs); 1277 } else { 1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1279 } 1280 if (ret != -EPIPE && ret != -ESTRPIPE) 1281 break; 1282 1283 /* test, if we can't store new data, because the stream */ 1284 /* has not been started */ 1285 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1286 return -EAGAIN; 1287 } 1288 return ret; 1289 } 1290 1291 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1292 { 1293 struct snd_pcm_runtime *runtime = substream->runtime; 1294 int ret; 1295 while (1) { 1296 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1297 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1298 #ifdef OSS_DEBUG 1299 pcm_dbg(substream->pcm, 1300 "pcm_oss: readv: recovering from %s\n", 1301 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1302 "XRUN" : "SUSPEND"); 1303 #endif 1304 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1305 if (ret < 0) 1306 break; 1307 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1308 ret = snd_pcm_oss_prepare(substream); 1309 if (ret < 0) 1310 break; 1311 } 1312 if (in_kernel) { 1313 mm_segment_t fs; 1314 fs = snd_enter_user(); 1315 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1316 snd_leave_user(fs); 1317 } else { 1318 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1319 } 1320 if (ret != -EPIPE && ret != -ESTRPIPE) 1321 break; 1322 } 1323 return ret; 1324 } 1325 1326 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1327 { 1328 struct snd_pcm_runtime *runtime = substream->runtime; 1329 snd_pcm_sframes_t frames, frames1; 1330 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1331 if (runtime->oss.plugin_first) { 1332 struct snd_pcm_plugin_channel *channels; 1333 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1334 if (!in_kernel) { 1335 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1336 return -EFAULT; 1337 buf = runtime->oss.buffer; 1338 } 1339 frames = bytes / oss_frame_bytes; 1340 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1341 if (frames1 < 0) 1342 return frames1; 1343 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1344 if (frames1 <= 0) 1345 return frames1; 1346 bytes = frames1 * oss_frame_bytes; 1347 } else 1348 #endif 1349 { 1350 frames = bytes_to_frames(runtime, bytes); 1351 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1352 if (frames1 <= 0) 1353 return frames1; 1354 bytes = frames_to_bytes(runtime, frames1); 1355 } 1356 return bytes; 1357 } 1358 1359 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1360 { 1361 size_t xfer = 0; 1362 ssize_t tmp; 1363 struct snd_pcm_runtime *runtime = substream->runtime; 1364 1365 if (atomic_read(&substream->mmap_count)) 1366 return -ENXIO; 1367 1368 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1369 return tmp; 1370 mutex_lock(&runtime->oss.params_lock); 1371 while (bytes > 0) { 1372 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1373 tmp = bytes; 1374 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1375 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1376 if (tmp > 0) { 1377 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1378 tmp = -EFAULT; 1379 goto err; 1380 } 1381 } 1382 runtime->oss.buffer_used += tmp; 1383 buf += tmp; 1384 bytes -= tmp; 1385 xfer += tmp; 1386 if (substream->oss.setup.partialfrag || 1387 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1388 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1389 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1390 if (tmp <= 0) 1391 goto err; 1392 runtime->oss.bytes += tmp; 1393 runtime->oss.period_ptr += tmp; 1394 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1395 if (runtime->oss.period_ptr == 0 || 1396 runtime->oss.period_ptr == runtime->oss.buffer_used) 1397 runtime->oss.buffer_used = 0; 1398 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1399 tmp = -EAGAIN; 1400 goto err; 1401 } 1402 } 1403 } else { 1404 tmp = snd_pcm_oss_write2(substream, 1405 (const char __force *)buf, 1406 runtime->oss.period_bytes, 0); 1407 if (tmp <= 0) 1408 goto err; 1409 runtime->oss.bytes += tmp; 1410 buf += tmp; 1411 bytes -= tmp; 1412 xfer += tmp; 1413 if ((substream->f_flags & O_NONBLOCK) != 0 && 1414 tmp != runtime->oss.period_bytes) 1415 break; 1416 } 1417 } 1418 mutex_unlock(&runtime->oss.params_lock); 1419 return xfer; 1420 1421 err: 1422 mutex_unlock(&runtime->oss.params_lock); 1423 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1424 } 1425 1426 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1427 { 1428 struct snd_pcm_runtime *runtime = substream->runtime; 1429 snd_pcm_sframes_t frames, frames1; 1430 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1431 char __user *final_dst = (char __force __user *)buf; 1432 if (runtime->oss.plugin_first) { 1433 struct snd_pcm_plugin_channel *channels; 1434 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1435 if (!in_kernel) 1436 buf = runtime->oss.buffer; 1437 frames = bytes / oss_frame_bytes; 1438 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1439 if (frames1 < 0) 1440 return frames1; 1441 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1442 if (frames1 <= 0) 1443 return frames1; 1444 bytes = frames1 * oss_frame_bytes; 1445 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1446 return -EFAULT; 1447 } else 1448 #endif 1449 { 1450 frames = bytes_to_frames(runtime, bytes); 1451 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1452 if (frames1 <= 0) 1453 return frames1; 1454 bytes = frames_to_bytes(runtime, frames1); 1455 } 1456 return bytes; 1457 } 1458 1459 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1460 { 1461 size_t xfer = 0; 1462 ssize_t tmp; 1463 struct snd_pcm_runtime *runtime = substream->runtime; 1464 1465 if (atomic_read(&substream->mmap_count)) 1466 return -ENXIO; 1467 1468 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1469 return tmp; 1470 mutex_lock(&runtime->oss.params_lock); 1471 while (bytes > 0) { 1472 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1473 if (runtime->oss.buffer_used == 0) { 1474 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1475 if (tmp <= 0) 1476 goto err; 1477 runtime->oss.bytes += tmp; 1478 runtime->oss.period_ptr = tmp; 1479 runtime->oss.buffer_used = tmp; 1480 } 1481 tmp = bytes; 1482 if ((size_t) tmp > runtime->oss.buffer_used) 1483 tmp = runtime->oss.buffer_used; 1484 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1485 tmp = -EFAULT; 1486 goto err; 1487 } 1488 buf += tmp; 1489 bytes -= tmp; 1490 xfer += tmp; 1491 runtime->oss.buffer_used -= tmp; 1492 } else { 1493 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1494 runtime->oss.period_bytes, 0); 1495 if (tmp <= 0) 1496 goto err; 1497 runtime->oss.bytes += tmp; 1498 buf += tmp; 1499 bytes -= tmp; 1500 xfer += tmp; 1501 } 1502 } 1503 mutex_unlock(&runtime->oss.params_lock); 1504 return xfer; 1505 1506 err: 1507 mutex_unlock(&runtime->oss.params_lock); 1508 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1509 } 1510 1511 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1512 { 1513 struct snd_pcm_substream *substream; 1514 struct snd_pcm_runtime *runtime; 1515 int i; 1516 1517 for (i = 0; i < 2; i++) { 1518 substream = pcm_oss_file->streams[i]; 1519 if (!substream) 1520 continue; 1521 runtime = substream->runtime; 1522 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1523 runtime->oss.prepare = 1; 1524 runtime->oss.buffer_used = 0; 1525 runtime->oss.prev_hw_ptr_period = 0; 1526 runtime->oss.period_ptr = 0; 1527 } 1528 return 0; 1529 } 1530 1531 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1532 { 1533 struct snd_pcm_substream *substream; 1534 int err; 1535 1536 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1537 if (substream != NULL) { 1538 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1539 return err; 1540 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1541 } 1542 /* note: all errors from the start action are ignored */ 1543 /* OSS apps do not know, how to handle them */ 1544 return 0; 1545 } 1546 1547 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1548 { 1549 struct snd_pcm_runtime *runtime; 1550 ssize_t result = 0; 1551 snd_pcm_state_t state; 1552 long res; 1553 wait_queue_t wait; 1554 1555 runtime = substream->runtime; 1556 init_waitqueue_entry(&wait, current); 1557 add_wait_queue(&runtime->sleep, &wait); 1558 #ifdef OSS_DEBUG 1559 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1560 #endif 1561 while (1) { 1562 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1563 if (result > 0) { 1564 runtime->oss.buffer_used = 0; 1565 result = 0; 1566 break; 1567 } 1568 if (result != 0 && result != -EAGAIN) 1569 break; 1570 result = 0; 1571 set_current_state(TASK_INTERRUPTIBLE); 1572 snd_pcm_stream_lock_irq(substream); 1573 state = runtime->status->state; 1574 snd_pcm_stream_unlock_irq(substream); 1575 if (state != SNDRV_PCM_STATE_RUNNING) { 1576 set_current_state(TASK_RUNNING); 1577 break; 1578 } 1579 res = schedule_timeout(10 * HZ); 1580 if (signal_pending(current)) { 1581 result = -ERESTARTSYS; 1582 break; 1583 } 1584 if (res == 0) { 1585 pcm_err(substream->pcm, 1586 "OSS sync error - DMA timeout\n"); 1587 result = -EIO; 1588 break; 1589 } 1590 } 1591 remove_wait_queue(&runtime->sleep, &wait); 1592 return result; 1593 } 1594 1595 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1596 { 1597 int err = 0; 1598 unsigned int saved_f_flags; 1599 struct snd_pcm_substream *substream; 1600 struct snd_pcm_runtime *runtime; 1601 snd_pcm_format_t format; 1602 unsigned long width; 1603 size_t size; 1604 1605 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1606 if (substream != NULL) { 1607 runtime = substream->runtime; 1608 if (atomic_read(&substream->mmap_count)) 1609 goto __direct; 1610 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1611 return err; 1612 format = snd_pcm_oss_format_from(runtime->oss.format); 1613 width = snd_pcm_format_physical_width(format); 1614 mutex_lock(&runtime->oss.params_lock); 1615 if (runtime->oss.buffer_used > 0) { 1616 #ifdef OSS_DEBUG 1617 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1618 #endif 1619 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1620 snd_pcm_format_set_silence(format, 1621 runtime->oss.buffer + runtime->oss.buffer_used, 1622 size); 1623 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1624 if (err < 0) { 1625 mutex_unlock(&runtime->oss.params_lock); 1626 return err; 1627 } 1628 } else if (runtime->oss.period_ptr > 0) { 1629 #ifdef OSS_DEBUG 1630 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1631 #endif 1632 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1633 snd_pcm_format_set_silence(format, 1634 runtime->oss.buffer, 1635 size * 8 / width); 1636 err = snd_pcm_oss_sync1(substream, size); 1637 if (err < 0) { 1638 mutex_unlock(&runtime->oss.params_lock); 1639 return err; 1640 } 1641 } 1642 /* 1643 * The ALSA's period might be a bit large than OSS one. 1644 * Fill the remain portion of ALSA period with zeros. 1645 */ 1646 size = runtime->control->appl_ptr % runtime->period_size; 1647 if (size > 0) { 1648 size = runtime->period_size - size; 1649 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1650 size = (runtime->frame_bits * size) / 8; 1651 while (size > 0) { 1652 mm_segment_t fs; 1653 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1654 size -= size1; 1655 size1 *= 8; 1656 size1 /= runtime->sample_bits; 1657 snd_pcm_format_set_silence(runtime->format, 1658 runtime->oss.buffer, 1659 size1); 1660 size1 /= runtime->channels; /* frames */ 1661 fs = snd_enter_user(); 1662 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1); 1663 snd_leave_user(fs); 1664 } 1665 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1666 void __user *buffers[runtime->channels]; 1667 memset(buffers, 0, runtime->channels * sizeof(void *)); 1668 snd_pcm_lib_writev(substream, buffers, size); 1669 } 1670 } 1671 mutex_unlock(&runtime->oss.params_lock); 1672 /* 1673 * finish sync: drain the buffer 1674 */ 1675 __direct: 1676 saved_f_flags = substream->f_flags; 1677 substream->f_flags &= ~O_NONBLOCK; 1678 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1679 substream->f_flags = saved_f_flags; 1680 if (err < 0) 1681 return err; 1682 runtime->oss.prepare = 1; 1683 } 1684 1685 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1686 if (substream != NULL) { 1687 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1688 return err; 1689 runtime = substream->runtime; 1690 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1691 if (err < 0) 1692 return err; 1693 runtime->oss.buffer_used = 0; 1694 runtime->oss.prepare = 1; 1695 } 1696 return 0; 1697 } 1698 1699 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1700 { 1701 int idx; 1702 1703 for (idx = 1; idx >= 0; --idx) { 1704 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1705 struct snd_pcm_runtime *runtime; 1706 if (substream == NULL) 1707 continue; 1708 runtime = substream->runtime; 1709 if (rate < 1000) 1710 rate = 1000; 1711 else if (rate > 192000) 1712 rate = 192000; 1713 if (runtime->oss.rate != rate) { 1714 runtime->oss.params = 1; 1715 runtime->oss.rate = rate; 1716 } 1717 } 1718 return snd_pcm_oss_get_rate(pcm_oss_file); 1719 } 1720 1721 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1722 { 1723 struct snd_pcm_substream *substream; 1724 int err; 1725 1726 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1727 return err; 1728 return substream->runtime->oss.rate; 1729 } 1730 1731 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1732 { 1733 int idx; 1734 if (channels < 1) 1735 channels = 1; 1736 if (channels > 128) 1737 return -EINVAL; 1738 for (idx = 1; idx >= 0; --idx) { 1739 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1740 struct snd_pcm_runtime *runtime; 1741 if (substream == NULL) 1742 continue; 1743 runtime = substream->runtime; 1744 if (runtime->oss.channels != channels) { 1745 runtime->oss.params = 1; 1746 runtime->oss.channels = channels; 1747 } 1748 } 1749 return snd_pcm_oss_get_channels(pcm_oss_file); 1750 } 1751 1752 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1753 { 1754 struct snd_pcm_substream *substream; 1755 int err; 1756 1757 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1758 return err; 1759 return substream->runtime->oss.channels; 1760 } 1761 1762 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1763 { 1764 struct snd_pcm_substream *substream; 1765 int err; 1766 1767 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1768 return err; 1769 return substream->runtime->oss.period_bytes; 1770 } 1771 1772 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1773 { 1774 struct snd_pcm_substream *substream; 1775 int err; 1776 int direct; 1777 struct snd_pcm_hw_params *params; 1778 unsigned int formats = 0; 1779 struct snd_mask format_mask; 1780 int fmt; 1781 1782 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1783 return err; 1784 if (atomic_read(&substream->mmap_count)) 1785 direct = 1; 1786 else 1787 direct = substream->oss.setup.direct; 1788 if (!direct) 1789 return AFMT_MU_LAW | AFMT_U8 | 1790 AFMT_S16_LE | AFMT_S16_BE | 1791 AFMT_S8 | AFMT_U16_LE | 1792 AFMT_U16_BE | 1793 AFMT_S32_LE | AFMT_S32_BE | 1794 AFMT_S24_LE | AFMT_S24_BE | 1795 AFMT_S24_PACKED; 1796 params = kmalloc(sizeof(*params), GFP_KERNEL); 1797 if (!params) 1798 return -ENOMEM; 1799 _snd_pcm_hw_params_any(params); 1800 err = snd_pcm_hw_refine(substream, params); 1801 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1802 kfree(params); 1803 if (err < 0) 1804 return err; 1805 for (fmt = 0; fmt < 32; ++fmt) { 1806 if (snd_mask_test(&format_mask, fmt)) { 1807 int f = snd_pcm_oss_format_to(fmt); 1808 if (f >= 0) 1809 formats |= f; 1810 } 1811 } 1812 return formats; 1813 } 1814 1815 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1816 { 1817 int formats, idx; 1818 1819 if (format != AFMT_QUERY) { 1820 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1821 if (formats < 0) 1822 return formats; 1823 if (!(formats & format)) 1824 format = AFMT_U8; 1825 for (idx = 1; idx >= 0; --idx) { 1826 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1827 struct snd_pcm_runtime *runtime; 1828 if (substream == NULL) 1829 continue; 1830 runtime = substream->runtime; 1831 if (runtime->oss.format != format) { 1832 runtime->oss.params = 1; 1833 runtime->oss.format = format; 1834 } 1835 } 1836 } 1837 return snd_pcm_oss_get_format(pcm_oss_file); 1838 } 1839 1840 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1841 { 1842 struct snd_pcm_substream *substream; 1843 int err; 1844 1845 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1846 return err; 1847 return substream->runtime->oss.format; 1848 } 1849 1850 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1851 { 1852 struct snd_pcm_runtime *runtime; 1853 1854 if (substream == NULL) 1855 return 0; 1856 runtime = substream->runtime; 1857 if (subdivide == 0) { 1858 subdivide = runtime->oss.subdivision; 1859 if (subdivide == 0) 1860 subdivide = 1; 1861 return subdivide; 1862 } 1863 if (runtime->oss.subdivision || runtime->oss.fragshift) 1864 return -EINVAL; 1865 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1866 subdivide != 8 && subdivide != 16) 1867 return -EINVAL; 1868 runtime->oss.subdivision = subdivide; 1869 runtime->oss.params = 1; 1870 return subdivide; 1871 } 1872 1873 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1874 { 1875 int err = -EINVAL, idx; 1876 1877 for (idx = 1; idx >= 0; --idx) { 1878 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1879 if (substream == NULL) 1880 continue; 1881 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1882 return err; 1883 } 1884 return err; 1885 } 1886 1887 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1888 { 1889 struct snd_pcm_runtime *runtime; 1890 1891 if (substream == NULL) 1892 return 0; 1893 runtime = substream->runtime; 1894 if (runtime->oss.subdivision || runtime->oss.fragshift) 1895 return -EINVAL; 1896 runtime->oss.fragshift = val & 0xffff; 1897 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1898 if (runtime->oss.fragshift < 4) /* < 16 */ 1899 runtime->oss.fragshift = 4; 1900 if (runtime->oss.maxfrags < 2) 1901 runtime->oss.maxfrags = 2; 1902 runtime->oss.params = 1; 1903 return 0; 1904 } 1905 1906 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1907 { 1908 int err = -EINVAL, idx; 1909 1910 for (idx = 1; idx >= 0; --idx) { 1911 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1912 if (substream == NULL) 1913 continue; 1914 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1915 return err; 1916 } 1917 return err; 1918 } 1919 1920 static int snd_pcm_oss_nonblock(struct file * file) 1921 { 1922 spin_lock(&file->f_lock); 1923 file->f_flags |= O_NONBLOCK; 1924 spin_unlock(&file->f_lock); 1925 return 0; 1926 } 1927 1928 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1929 { 1930 1931 if (substream == NULL) { 1932 res &= ~DSP_CAP_DUPLEX; 1933 return res; 1934 } 1935 #ifdef DSP_CAP_MULTI 1936 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1937 if (substream->pstr->substream_count > 1) 1938 res |= DSP_CAP_MULTI; 1939 #endif 1940 /* DSP_CAP_REALTIME is set all times: */ 1941 /* all ALSA drivers can return actual pointer in ring buffer */ 1942 #if defined(DSP_CAP_REALTIME) && 0 1943 { 1944 struct snd_pcm_runtime *runtime = substream->runtime; 1945 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1946 res &= ~DSP_CAP_REALTIME; 1947 } 1948 #endif 1949 return res; 1950 } 1951 1952 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1953 { 1954 int result, idx; 1955 1956 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1957 for (idx = 0; idx < 2; idx++) { 1958 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1959 result = snd_pcm_oss_get_caps1(substream, result); 1960 } 1961 result |= 0x0001; /* revision - same as SB AWE 64 */ 1962 return result; 1963 } 1964 1965 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 1966 snd_pcm_uframes_t hw_ptr) 1967 { 1968 struct snd_pcm_runtime *runtime = substream->runtime; 1969 snd_pcm_uframes_t appl_ptr; 1970 appl_ptr = hw_ptr + runtime->buffer_size; 1971 appl_ptr %= runtime->boundary; 1972 runtime->control->appl_ptr = appl_ptr; 1973 } 1974 1975 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1976 { 1977 struct snd_pcm_runtime *runtime; 1978 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1979 int err, cmd; 1980 1981 #ifdef OSS_DEBUG 1982 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 1983 #endif 1984 1985 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1986 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1987 1988 if (psubstream) { 1989 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1990 return err; 1991 } 1992 if (csubstream) { 1993 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1994 return err; 1995 } 1996 if (psubstream) { 1997 runtime = psubstream->runtime; 1998 if (trigger & PCM_ENABLE_OUTPUT) { 1999 if (runtime->oss.trigger) 2000 goto _skip1; 2001 if (atomic_read(&psubstream->mmap_count)) 2002 snd_pcm_oss_simulate_fill(psubstream, 2003 get_hw_ptr_period(runtime)); 2004 runtime->oss.trigger = 1; 2005 runtime->start_threshold = 1; 2006 cmd = SNDRV_PCM_IOCTL_START; 2007 } else { 2008 if (!runtime->oss.trigger) 2009 goto _skip1; 2010 runtime->oss.trigger = 0; 2011 runtime->start_threshold = runtime->boundary; 2012 cmd = SNDRV_PCM_IOCTL_DROP; 2013 runtime->oss.prepare = 1; 2014 } 2015 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2016 if (err < 0) 2017 return err; 2018 } 2019 _skip1: 2020 if (csubstream) { 2021 runtime = csubstream->runtime; 2022 if (trigger & PCM_ENABLE_INPUT) { 2023 if (runtime->oss.trigger) 2024 goto _skip2; 2025 runtime->oss.trigger = 1; 2026 runtime->start_threshold = 1; 2027 cmd = SNDRV_PCM_IOCTL_START; 2028 } else { 2029 if (!runtime->oss.trigger) 2030 goto _skip2; 2031 runtime->oss.trigger = 0; 2032 runtime->start_threshold = runtime->boundary; 2033 cmd = SNDRV_PCM_IOCTL_DROP; 2034 runtime->oss.prepare = 1; 2035 } 2036 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2037 if (err < 0) 2038 return err; 2039 } 2040 _skip2: 2041 return 0; 2042 } 2043 2044 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2045 { 2046 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2047 int result = 0; 2048 2049 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2050 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2051 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2052 result |= PCM_ENABLE_OUTPUT; 2053 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2054 result |= PCM_ENABLE_INPUT; 2055 return result; 2056 } 2057 2058 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2059 { 2060 struct snd_pcm_substream *substream; 2061 struct snd_pcm_runtime *runtime; 2062 snd_pcm_sframes_t delay; 2063 int err; 2064 2065 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2066 if (substream == NULL) 2067 return -EINVAL; 2068 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2069 return err; 2070 runtime = substream->runtime; 2071 if (runtime->oss.params || runtime->oss.prepare) 2072 return 0; 2073 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2074 if (err == -EPIPE) 2075 delay = 0; /* hack for broken OSS applications */ 2076 else if (err < 0) 2077 return err; 2078 return snd_pcm_oss_bytes(substream, delay); 2079 } 2080 2081 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2082 { 2083 struct snd_pcm_substream *substream; 2084 struct snd_pcm_runtime *runtime; 2085 snd_pcm_sframes_t delay; 2086 int fixup; 2087 struct count_info info; 2088 int err; 2089 2090 if (_info == NULL) 2091 return -EFAULT; 2092 substream = pcm_oss_file->streams[stream]; 2093 if (substream == NULL) 2094 return -EINVAL; 2095 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2096 return err; 2097 runtime = substream->runtime; 2098 if (runtime->oss.params || runtime->oss.prepare) { 2099 memset(&info, 0, sizeof(info)); 2100 if (copy_to_user(_info, &info, sizeof(info))) 2101 return -EFAULT; 2102 return 0; 2103 } 2104 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2105 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2106 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2107 err = 0; 2108 delay = 0; 2109 fixup = 0; 2110 } else { 2111 fixup = runtime->oss.buffer_used; 2112 } 2113 } else { 2114 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2115 fixup = -runtime->oss.buffer_used; 2116 } 2117 if (err < 0) 2118 return err; 2119 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2120 if (atomic_read(&substream->mmap_count)) { 2121 snd_pcm_sframes_t n; 2122 delay = get_hw_ptr_period(runtime); 2123 n = delay - runtime->oss.prev_hw_ptr_period; 2124 if (n < 0) 2125 n += runtime->boundary; 2126 info.blocks = n / runtime->period_size; 2127 runtime->oss.prev_hw_ptr_period = delay; 2128 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2129 snd_pcm_oss_simulate_fill(substream, delay); 2130 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2131 } else { 2132 delay = snd_pcm_oss_bytes(substream, delay); 2133 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2134 if (substream->oss.setup.buggyptr) 2135 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2136 else 2137 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2138 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2139 } else { 2140 delay += fixup; 2141 info.blocks = delay / runtime->oss.period_bytes; 2142 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2143 } 2144 } 2145 if (copy_to_user(_info, &info, sizeof(info))) 2146 return -EFAULT; 2147 return 0; 2148 } 2149 2150 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2151 { 2152 struct snd_pcm_substream *substream; 2153 struct snd_pcm_runtime *runtime; 2154 snd_pcm_sframes_t avail; 2155 int fixup; 2156 struct audio_buf_info info; 2157 int err; 2158 2159 if (_info == NULL) 2160 return -EFAULT; 2161 substream = pcm_oss_file->streams[stream]; 2162 if (substream == NULL) 2163 return -EINVAL; 2164 runtime = substream->runtime; 2165 2166 if (runtime->oss.params && 2167 (err = snd_pcm_oss_change_params(substream)) < 0) 2168 return err; 2169 2170 info.fragsize = runtime->oss.period_bytes; 2171 info.fragstotal = runtime->periods; 2172 if (runtime->oss.prepare) { 2173 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2174 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2175 info.fragments = runtime->oss.periods; 2176 } else { 2177 info.bytes = 0; 2178 info.fragments = 0; 2179 } 2180 } else { 2181 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2182 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2183 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2184 avail = runtime->buffer_size; 2185 err = 0; 2186 fixup = 0; 2187 } else { 2188 avail = runtime->buffer_size - avail; 2189 fixup = -runtime->oss.buffer_used; 2190 } 2191 } else { 2192 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2193 fixup = runtime->oss.buffer_used; 2194 } 2195 if (err < 0) 2196 return err; 2197 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2198 info.fragments = info.bytes / runtime->oss.period_bytes; 2199 } 2200 2201 #ifdef OSS_DEBUG 2202 pcm_dbg(substream->pcm, 2203 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2204 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2205 #endif 2206 if (copy_to_user(_info, &info, sizeof(info))) 2207 return -EFAULT; 2208 return 0; 2209 } 2210 2211 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2212 { 2213 // it won't be probably implemented 2214 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2215 return -EINVAL; 2216 } 2217 2218 static const char *strip_task_path(const char *path) 2219 { 2220 const char *ptr, *ptrl = NULL; 2221 for (ptr = path; *ptr; ptr++) { 2222 if (*ptr == '/') 2223 ptrl = ptr + 1; 2224 } 2225 return ptrl; 2226 } 2227 2228 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2229 const char *task_name, 2230 struct snd_pcm_oss_setup *rsetup) 2231 { 2232 struct snd_pcm_oss_setup *setup; 2233 2234 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2235 do { 2236 for (setup = pcm->streams[stream].oss.setup_list; setup; 2237 setup = setup->next) { 2238 if (!strcmp(setup->task_name, task_name)) 2239 goto out; 2240 } 2241 } while ((task_name = strip_task_path(task_name)) != NULL); 2242 out: 2243 if (setup) 2244 *rsetup = *setup; 2245 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2246 } 2247 2248 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2249 { 2250 struct snd_pcm_runtime *runtime; 2251 runtime = substream->runtime; 2252 vfree(runtime->oss.buffer); 2253 runtime->oss.buffer = NULL; 2254 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2255 snd_pcm_oss_plugin_clear(substream); 2256 #endif 2257 substream->oss.oss = 0; 2258 } 2259 2260 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2261 struct snd_pcm_oss_setup *setup, 2262 int minor) 2263 { 2264 struct snd_pcm_runtime *runtime; 2265 2266 substream->oss.oss = 1; 2267 substream->oss.setup = *setup; 2268 if (setup->nonblock) 2269 substream->f_flags |= O_NONBLOCK; 2270 else if (setup->block) 2271 substream->f_flags &= ~O_NONBLOCK; 2272 runtime = substream->runtime; 2273 runtime->oss.params = 1; 2274 runtime->oss.trigger = 1; 2275 runtime->oss.rate = 8000; 2276 mutex_init(&runtime->oss.params_lock); 2277 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2278 case SNDRV_MINOR_OSS_PCM_8: 2279 runtime->oss.format = AFMT_U8; 2280 break; 2281 case SNDRV_MINOR_OSS_PCM_16: 2282 runtime->oss.format = AFMT_S16_LE; 2283 break; 2284 default: 2285 runtime->oss.format = AFMT_MU_LAW; 2286 } 2287 runtime->oss.channels = 1; 2288 runtime->oss.fragshift = 0; 2289 runtime->oss.maxfrags = 0; 2290 runtime->oss.subdivision = 0; 2291 substream->pcm_release = snd_pcm_oss_release_substream; 2292 } 2293 2294 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2295 { 2296 int cidx; 2297 if (!pcm_oss_file) 2298 return 0; 2299 for (cidx = 0; cidx < 2; ++cidx) { 2300 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2301 if (substream) 2302 snd_pcm_release_substream(substream); 2303 } 2304 kfree(pcm_oss_file); 2305 return 0; 2306 } 2307 2308 static int snd_pcm_oss_open_file(struct file *file, 2309 struct snd_pcm *pcm, 2310 struct snd_pcm_oss_file **rpcm_oss_file, 2311 int minor, 2312 struct snd_pcm_oss_setup *setup) 2313 { 2314 int idx, err; 2315 struct snd_pcm_oss_file *pcm_oss_file; 2316 struct snd_pcm_substream *substream; 2317 fmode_t f_mode = file->f_mode; 2318 2319 if (rpcm_oss_file) 2320 *rpcm_oss_file = NULL; 2321 2322 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2323 if (pcm_oss_file == NULL) 2324 return -ENOMEM; 2325 2326 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2327 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2328 f_mode = FMODE_WRITE; 2329 2330 file->f_flags &= ~O_APPEND; 2331 for (idx = 0; idx < 2; idx++) { 2332 if (setup[idx].disable) 2333 continue; 2334 if (! pcm->streams[idx].substream_count) 2335 continue; /* no matching substream */ 2336 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2337 if (! (f_mode & FMODE_WRITE)) 2338 continue; 2339 } else { 2340 if (! (f_mode & FMODE_READ)) 2341 continue; 2342 } 2343 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2344 if (err < 0) { 2345 snd_pcm_oss_release_file(pcm_oss_file); 2346 return err; 2347 } 2348 2349 pcm_oss_file->streams[idx] = substream; 2350 substream->file = pcm_oss_file; 2351 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2352 } 2353 2354 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2355 snd_pcm_oss_release_file(pcm_oss_file); 2356 return -EINVAL; 2357 } 2358 2359 file->private_data = pcm_oss_file; 2360 if (rpcm_oss_file) 2361 *rpcm_oss_file = pcm_oss_file; 2362 return 0; 2363 } 2364 2365 2366 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2367 { 2368 unsigned int idx; 2369 2370 if (snd_BUG_ON(!task || !name || size < 2)) 2371 return -EINVAL; 2372 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2373 name[idx] = task->comm[idx]; 2374 name[idx] = '\0'; 2375 return 0; 2376 } 2377 2378 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2379 { 2380 int err; 2381 char task_name[32]; 2382 struct snd_pcm *pcm; 2383 struct snd_pcm_oss_file *pcm_oss_file; 2384 struct snd_pcm_oss_setup setup[2]; 2385 int nonblock; 2386 wait_queue_t wait; 2387 2388 err = nonseekable_open(inode, file); 2389 if (err < 0) 2390 return err; 2391 2392 pcm = snd_lookup_oss_minor_data(iminor(inode), 2393 SNDRV_OSS_DEVICE_TYPE_PCM); 2394 if (pcm == NULL) { 2395 err = -ENODEV; 2396 goto __error1; 2397 } 2398 err = snd_card_file_add(pcm->card, file); 2399 if (err < 0) 2400 goto __error1; 2401 if (!try_module_get(pcm->card->module)) { 2402 err = -EFAULT; 2403 goto __error2; 2404 } 2405 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2406 err = -EFAULT; 2407 goto __error; 2408 } 2409 memset(setup, 0, sizeof(setup)); 2410 if (file->f_mode & FMODE_WRITE) 2411 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2412 task_name, &setup[0]); 2413 if (file->f_mode & FMODE_READ) 2414 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2415 task_name, &setup[1]); 2416 2417 nonblock = !!(file->f_flags & O_NONBLOCK); 2418 if (!nonblock) 2419 nonblock = nonblock_open; 2420 2421 init_waitqueue_entry(&wait, current); 2422 add_wait_queue(&pcm->open_wait, &wait); 2423 mutex_lock(&pcm->open_mutex); 2424 while (1) { 2425 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2426 iminor(inode), setup); 2427 if (err >= 0) 2428 break; 2429 if (err == -EAGAIN) { 2430 if (nonblock) { 2431 err = -EBUSY; 2432 break; 2433 } 2434 } else 2435 break; 2436 set_current_state(TASK_INTERRUPTIBLE); 2437 mutex_unlock(&pcm->open_mutex); 2438 schedule(); 2439 mutex_lock(&pcm->open_mutex); 2440 if (pcm->card->shutdown) { 2441 err = -ENODEV; 2442 break; 2443 } 2444 if (signal_pending(current)) { 2445 err = -ERESTARTSYS; 2446 break; 2447 } 2448 } 2449 remove_wait_queue(&pcm->open_wait, &wait); 2450 mutex_unlock(&pcm->open_mutex); 2451 if (err < 0) 2452 goto __error; 2453 snd_card_unref(pcm->card); 2454 return err; 2455 2456 __error: 2457 module_put(pcm->card->module); 2458 __error2: 2459 snd_card_file_remove(pcm->card, file); 2460 __error1: 2461 if (pcm) 2462 snd_card_unref(pcm->card); 2463 return err; 2464 } 2465 2466 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2467 { 2468 struct snd_pcm *pcm; 2469 struct snd_pcm_substream *substream; 2470 struct snd_pcm_oss_file *pcm_oss_file; 2471 2472 pcm_oss_file = file->private_data; 2473 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2474 if (substream == NULL) 2475 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2476 if (snd_BUG_ON(!substream)) 2477 return -ENXIO; 2478 pcm = substream->pcm; 2479 if (!pcm->card->shutdown) 2480 snd_pcm_oss_sync(pcm_oss_file); 2481 mutex_lock(&pcm->open_mutex); 2482 snd_pcm_oss_release_file(pcm_oss_file); 2483 mutex_unlock(&pcm->open_mutex); 2484 wake_up(&pcm->open_wait); 2485 module_put(pcm->card->module); 2486 snd_card_file_remove(pcm->card, file); 2487 return 0; 2488 } 2489 2490 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2491 { 2492 struct snd_pcm_oss_file *pcm_oss_file; 2493 int __user *p = (int __user *)arg; 2494 int res; 2495 2496 pcm_oss_file = file->private_data; 2497 if (cmd == OSS_GETVERSION) 2498 return put_user(SNDRV_OSS_VERSION, p); 2499 if (cmd == OSS_ALSAEMULVER) 2500 return put_user(1, p); 2501 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2502 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2503 struct snd_pcm_substream *substream; 2504 int idx; 2505 for (idx = 0; idx < 2; ++idx) { 2506 substream = pcm_oss_file->streams[idx]; 2507 if (substream != NULL) 2508 break; 2509 } 2510 if (snd_BUG_ON(idx >= 2)) 2511 return -ENXIO; 2512 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2513 } 2514 #endif 2515 if (((cmd >> 8) & 0xff) != 'P') 2516 return -EINVAL; 2517 #ifdef OSS_DEBUG 2518 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2519 #endif 2520 switch (cmd) { 2521 case SNDCTL_DSP_RESET: 2522 return snd_pcm_oss_reset(pcm_oss_file); 2523 case SNDCTL_DSP_SYNC: 2524 return snd_pcm_oss_sync(pcm_oss_file); 2525 case SNDCTL_DSP_SPEED: 2526 if (get_user(res, p)) 2527 return -EFAULT; 2528 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2529 return res; 2530 return put_user(res, p); 2531 case SOUND_PCM_READ_RATE: 2532 res = snd_pcm_oss_get_rate(pcm_oss_file); 2533 if (res < 0) 2534 return res; 2535 return put_user(res, p); 2536 case SNDCTL_DSP_STEREO: 2537 if (get_user(res, p)) 2538 return -EFAULT; 2539 res = res > 0 ? 2 : 1; 2540 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2541 return res; 2542 return put_user(--res, p); 2543 case SNDCTL_DSP_GETBLKSIZE: 2544 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2545 if (res < 0) 2546 return res; 2547 return put_user(res, p); 2548 case SNDCTL_DSP_SETFMT: 2549 if (get_user(res, p)) 2550 return -EFAULT; 2551 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2552 if (res < 0) 2553 return res; 2554 return put_user(res, p); 2555 case SOUND_PCM_READ_BITS: 2556 res = snd_pcm_oss_get_format(pcm_oss_file); 2557 if (res < 0) 2558 return res; 2559 return put_user(res, p); 2560 case SNDCTL_DSP_CHANNELS: 2561 if (get_user(res, p)) 2562 return -EFAULT; 2563 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2564 if (res < 0) 2565 return res; 2566 return put_user(res, p); 2567 case SOUND_PCM_READ_CHANNELS: 2568 res = snd_pcm_oss_get_channels(pcm_oss_file); 2569 if (res < 0) 2570 return res; 2571 return put_user(res, p); 2572 case SOUND_PCM_WRITE_FILTER: 2573 case SOUND_PCM_READ_FILTER: 2574 return -EIO; 2575 case SNDCTL_DSP_POST: 2576 return snd_pcm_oss_post(pcm_oss_file); 2577 case SNDCTL_DSP_SUBDIVIDE: 2578 if (get_user(res, p)) 2579 return -EFAULT; 2580 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2581 if (res < 0) 2582 return res; 2583 return put_user(res, p); 2584 case SNDCTL_DSP_SETFRAGMENT: 2585 if (get_user(res, p)) 2586 return -EFAULT; 2587 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2588 case SNDCTL_DSP_GETFMTS: 2589 res = snd_pcm_oss_get_formats(pcm_oss_file); 2590 if (res < 0) 2591 return res; 2592 return put_user(res, p); 2593 case SNDCTL_DSP_GETOSPACE: 2594 case SNDCTL_DSP_GETISPACE: 2595 return snd_pcm_oss_get_space(pcm_oss_file, 2596 cmd == SNDCTL_DSP_GETISPACE ? 2597 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2598 (struct audio_buf_info __user *) arg); 2599 case SNDCTL_DSP_NONBLOCK: 2600 return snd_pcm_oss_nonblock(file); 2601 case SNDCTL_DSP_GETCAPS: 2602 res = snd_pcm_oss_get_caps(pcm_oss_file); 2603 if (res < 0) 2604 return res; 2605 return put_user(res, p); 2606 case SNDCTL_DSP_GETTRIGGER: 2607 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2608 if (res < 0) 2609 return res; 2610 return put_user(res, p); 2611 case SNDCTL_DSP_SETTRIGGER: 2612 if (get_user(res, p)) 2613 return -EFAULT; 2614 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2615 case SNDCTL_DSP_GETIPTR: 2616 case SNDCTL_DSP_GETOPTR: 2617 return snd_pcm_oss_get_ptr(pcm_oss_file, 2618 cmd == SNDCTL_DSP_GETIPTR ? 2619 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2620 (struct count_info __user *) arg); 2621 case SNDCTL_DSP_MAPINBUF: 2622 case SNDCTL_DSP_MAPOUTBUF: 2623 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2624 cmd == SNDCTL_DSP_MAPINBUF ? 2625 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2626 (struct buffmem_desc __user *) arg); 2627 case SNDCTL_DSP_SETSYNCRO: 2628 /* stop DMA now.. */ 2629 return 0; 2630 case SNDCTL_DSP_SETDUPLEX: 2631 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2632 return 0; 2633 return -EIO; 2634 case SNDCTL_DSP_GETODELAY: 2635 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2636 if (res < 0) { 2637 /* it's for sure, some broken apps don't check for error codes */ 2638 put_user(0, p); 2639 return res; 2640 } 2641 return put_user(res, p); 2642 case SNDCTL_DSP_PROFILE: 2643 return 0; /* silently ignore */ 2644 default: 2645 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2646 } 2647 return -EINVAL; 2648 } 2649 2650 #ifdef CONFIG_COMPAT 2651 /* all compatible */ 2652 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2653 #else 2654 #define snd_pcm_oss_ioctl_compat NULL 2655 #endif 2656 2657 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2658 { 2659 struct snd_pcm_oss_file *pcm_oss_file; 2660 struct snd_pcm_substream *substream; 2661 2662 pcm_oss_file = file->private_data; 2663 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2664 if (substream == NULL) 2665 return -ENXIO; 2666 substream->f_flags = file->f_flags & O_NONBLOCK; 2667 #ifndef OSS_DEBUG 2668 return snd_pcm_oss_read1(substream, buf, count); 2669 #else 2670 { 2671 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2672 pcm_dbg(substream->pcm, 2673 "pcm_oss: read %li bytes (returned %li bytes)\n", 2674 (long)count, (long)res); 2675 return res; 2676 } 2677 #endif 2678 } 2679 2680 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2681 { 2682 struct snd_pcm_oss_file *pcm_oss_file; 2683 struct snd_pcm_substream *substream; 2684 long result; 2685 2686 pcm_oss_file = file->private_data; 2687 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2688 if (substream == NULL) 2689 return -ENXIO; 2690 substream->f_flags = file->f_flags & O_NONBLOCK; 2691 result = snd_pcm_oss_write1(substream, buf, count); 2692 #ifdef OSS_DEBUG 2693 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2694 (long)count, (long)result); 2695 #endif 2696 return result; 2697 } 2698 2699 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2700 { 2701 struct snd_pcm_runtime *runtime = substream->runtime; 2702 if (atomic_read(&substream->mmap_count)) 2703 return runtime->oss.prev_hw_ptr_period != 2704 get_hw_ptr_period(runtime); 2705 else 2706 return snd_pcm_playback_avail(runtime) >= 2707 runtime->oss.period_frames; 2708 } 2709 2710 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2711 { 2712 struct snd_pcm_runtime *runtime = substream->runtime; 2713 if (atomic_read(&substream->mmap_count)) 2714 return runtime->oss.prev_hw_ptr_period != 2715 get_hw_ptr_period(runtime); 2716 else 2717 return snd_pcm_capture_avail(runtime) >= 2718 runtime->oss.period_frames; 2719 } 2720 2721 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2722 { 2723 struct snd_pcm_oss_file *pcm_oss_file; 2724 unsigned int mask; 2725 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2726 2727 pcm_oss_file = file->private_data; 2728 2729 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2730 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2731 2732 mask = 0; 2733 if (psubstream != NULL) { 2734 struct snd_pcm_runtime *runtime = psubstream->runtime; 2735 poll_wait(file, &runtime->sleep, wait); 2736 snd_pcm_stream_lock_irq(psubstream); 2737 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2738 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2739 snd_pcm_oss_playback_ready(psubstream))) 2740 mask |= POLLOUT | POLLWRNORM; 2741 snd_pcm_stream_unlock_irq(psubstream); 2742 } 2743 if (csubstream != NULL) { 2744 struct snd_pcm_runtime *runtime = csubstream->runtime; 2745 snd_pcm_state_t ostate; 2746 poll_wait(file, &runtime->sleep, wait); 2747 snd_pcm_stream_lock_irq(csubstream); 2748 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2749 snd_pcm_oss_capture_ready(csubstream)) 2750 mask |= POLLIN | POLLRDNORM; 2751 snd_pcm_stream_unlock_irq(csubstream); 2752 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2753 struct snd_pcm_oss_file ofile; 2754 memset(&ofile, 0, sizeof(ofile)); 2755 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2756 runtime->oss.trigger = 0; 2757 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2758 } 2759 } 2760 2761 return mask; 2762 } 2763 2764 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2765 { 2766 struct snd_pcm_oss_file *pcm_oss_file; 2767 struct snd_pcm_substream *substream = NULL; 2768 struct snd_pcm_runtime *runtime; 2769 int err; 2770 2771 #ifdef OSS_DEBUG 2772 pr_debug("pcm_oss: mmap begin\n"); 2773 #endif 2774 pcm_oss_file = file->private_data; 2775 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2776 case VM_READ | VM_WRITE: 2777 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2778 if (substream) 2779 break; 2780 /* Fall through */ 2781 case VM_READ: 2782 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2783 break; 2784 case VM_WRITE: 2785 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2786 break; 2787 default: 2788 return -EINVAL; 2789 } 2790 /* set VM_READ access as well to fix memset() routines that do 2791 reads before writes (to improve performance) */ 2792 area->vm_flags |= VM_READ; 2793 if (substream == NULL) 2794 return -ENXIO; 2795 runtime = substream->runtime; 2796 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2797 return -EIO; 2798 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2799 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2800 else 2801 return -EIO; 2802 2803 if (runtime->oss.params) { 2804 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2805 return err; 2806 } 2807 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2808 if (runtime->oss.plugin_first != NULL) 2809 return -EIO; 2810 #endif 2811 2812 if (area->vm_pgoff != 0) 2813 return -EINVAL; 2814 2815 err = snd_pcm_mmap_data(substream, file, area); 2816 if (err < 0) 2817 return err; 2818 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2819 runtime->silence_threshold = 0; 2820 runtime->silence_size = 0; 2821 #ifdef OSS_DEBUG 2822 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2823 runtime->oss.mmap_bytes); 2824 #endif 2825 /* In mmap mode we never stop */ 2826 runtime->stop_threshold = runtime->boundary; 2827 2828 return 0; 2829 } 2830 2831 #ifdef CONFIG_SND_VERBOSE_PROCFS 2832 /* 2833 * /proc interface 2834 */ 2835 2836 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2837 struct snd_info_buffer *buffer) 2838 { 2839 struct snd_pcm_str *pstr = entry->private_data; 2840 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2841 mutex_lock(&pstr->oss.setup_mutex); 2842 while (setup) { 2843 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2844 setup->task_name, 2845 setup->periods, 2846 setup->period_size, 2847 setup->disable ? " disable" : "", 2848 setup->direct ? " direct" : "", 2849 setup->block ? " block" : "", 2850 setup->nonblock ? " non-block" : "", 2851 setup->partialfrag ? " partial-frag" : "", 2852 setup->nosilence ? " no-silence" : ""); 2853 setup = setup->next; 2854 } 2855 mutex_unlock(&pstr->oss.setup_mutex); 2856 } 2857 2858 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2859 { 2860 struct snd_pcm_oss_setup *setup, *setupn; 2861 2862 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2863 setup; setup = setupn) { 2864 setupn = setup->next; 2865 kfree(setup->task_name); 2866 kfree(setup); 2867 } 2868 pstr->oss.setup_list = NULL; 2869 } 2870 2871 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2872 struct snd_info_buffer *buffer) 2873 { 2874 struct snd_pcm_str *pstr = entry->private_data; 2875 char line[128], str[32], task_name[32]; 2876 const char *ptr; 2877 int idx1; 2878 struct snd_pcm_oss_setup *setup, *setup1, template; 2879 2880 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2881 mutex_lock(&pstr->oss.setup_mutex); 2882 memset(&template, 0, sizeof(template)); 2883 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2884 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2885 snd_pcm_oss_proc_free_setup_list(pstr); 2886 mutex_unlock(&pstr->oss.setup_mutex); 2887 continue; 2888 } 2889 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2890 if (!strcmp(setup->task_name, task_name)) { 2891 template = *setup; 2892 break; 2893 } 2894 } 2895 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2896 template.periods = simple_strtoul(str, NULL, 10); 2897 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2898 template.period_size = simple_strtoul(str, NULL, 10); 2899 for (idx1 = 31; idx1 >= 0; idx1--) 2900 if (template.period_size & (1 << idx1)) 2901 break; 2902 for (idx1--; idx1 >= 0; idx1--) 2903 template.period_size &= ~(1 << idx1); 2904 do { 2905 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2906 if (!strcmp(str, "disable")) { 2907 template.disable = 1; 2908 } else if (!strcmp(str, "direct")) { 2909 template.direct = 1; 2910 } else if (!strcmp(str, "block")) { 2911 template.block = 1; 2912 } else if (!strcmp(str, "non-block")) { 2913 template.nonblock = 1; 2914 } else if (!strcmp(str, "partial-frag")) { 2915 template.partialfrag = 1; 2916 } else if (!strcmp(str, "no-silence")) { 2917 template.nosilence = 1; 2918 } else if (!strcmp(str, "buggy-ptr")) { 2919 template.buggyptr = 1; 2920 } 2921 } while (*str); 2922 if (setup == NULL) { 2923 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2924 if (! setup) { 2925 buffer->error = -ENOMEM; 2926 mutex_unlock(&pstr->oss.setup_mutex); 2927 return; 2928 } 2929 if (pstr->oss.setup_list == NULL) 2930 pstr->oss.setup_list = setup; 2931 else { 2932 for (setup1 = pstr->oss.setup_list; 2933 setup1->next; setup1 = setup1->next); 2934 setup1->next = setup; 2935 } 2936 template.task_name = kstrdup(task_name, GFP_KERNEL); 2937 if (! template.task_name) { 2938 kfree(setup); 2939 buffer->error = -ENOMEM; 2940 mutex_unlock(&pstr->oss.setup_mutex); 2941 return; 2942 } 2943 } 2944 *setup = template; 2945 mutex_unlock(&pstr->oss.setup_mutex); 2946 } 2947 } 2948 2949 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2950 { 2951 int stream; 2952 for (stream = 0; stream < 2; ++stream) { 2953 struct snd_info_entry *entry; 2954 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2955 if (pstr->substream_count == 0) 2956 continue; 2957 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2958 entry->content = SNDRV_INFO_CONTENT_TEXT; 2959 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2960 entry->c.text.read = snd_pcm_oss_proc_read; 2961 entry->c.text.write = snd_pcm_oss_proc_write; 2962 entry->private_data = pstr; 2963 if (snd_info_register(entry) < 0) { 2964 snd_info_free_entry(entry); 2965 entry = NULL; 2966 } 2967 } 2968 pstr->oss.proc_entry = entry; 2969 } 2970 } 2971 2972 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2973 { 2974 int stream; 2975 for (stream = 0; stream < 2; ++stream) { 2976 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2977 snd_info_free_entry(pstr->oss.proc_entry); 2978 pstr->oss.proc_entry = NULL; 2979 snd_pcm_oss_proc_free_setup_list(pstr); 2980 } 2981 } 2982 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2983 #define snd_pcm_oss_proc_init(pcm) 2984 #define snd_pcm_oss_proc_done(pcm) 2985 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2986 2987 /* 2988 * ENTRY functions 2989 */ 2990 2991 static const struct file_operations snd_pcm_oss_f_reg = 2992 { 2993 .owner = THIS_MODULE, 2994 .read = snd_pcm_oss_read, 2995 .write = snd_pcm_oss_write, 2996 .open = snd_pcm_oss_open, 2997 .release = snd_pcm_oss_release, 2998 .llseek = no_llseek, 2999 .poll = snd_pcm_oss_poll, 3000 .unlocked_ioctl = snd_pcm_oss_ioctl, 3001 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3002 .mmap = snd_pcm_oss_mmap, 3003 }; 3004 3005 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3006 { 3007 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3008 pcm->card, index, &snd_pcm_oss_f_reg, 3009 pcm) < 0) { 3010 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3011 pcm->card->number, pcm->device); 3012 } 3013 } 3014 3015 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3016 { 3017 pcm->oss.reg = 0; 3018 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3019 char name[128]; 3020 int duplex; 3021 register_oss_dsp(pcm, 0); 3022 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3023 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3024 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3025 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3026 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3027 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3028 pcm->card->number, 3029 name); 3030 #endif 3031 pcm->oss.reg++; 3032 pcm->oss.reg_mask |= 1; 3033 } 3034 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3035 register_oss_dsp(pcm, 1); 3036 pcm->oss.reg++; 3037 pcm->oss.reg_mask |= 2; 3038 } 3039 3040 if (pcm->oss.reg) 3041 snd_pcm_oss_proc_init(pcm); 3042 3043 return 0; 3044 } 3045 3046 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3047 { 3048 if (pcm->oss.reg) { 3049 if (pcm->oss.reg_mask & 1) { 3050 pcm->oss.reg_mask &= ~1; 3051 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3052 pcm->card, 0); 3053 } 3054 if (pcm->oss.reg_mask & 2) { 3055 pcm->oss.reg_mask &= ~2; 3056 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3057 pcm->card, 1); 3058 } 3059 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3060 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3061 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3062 #endif 3063 } 3064 pcm->oss.reg = 0; 3065 } 3066 return 0; 3067 } 3068 3069 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3070 { 3071 snd_pcm_oss_disconnect_minor(pcm); 3072 snd_pcm_oss_proc_done(pcm); 3073 return 0; 3074 } 3075 3076 static struct snd_pcm_notify snd_pcm_oss_notify = 3077 { 3078 .n_register = snd_pcm_oss_register_minor, 3079 .n_disconnect = snd_pcm_oss_disconnect_minor, 3080 .n_unregister = snd_pcm_oss_unregister_minor, 3081 }; 3082 3083 static int __init alsa_pcm_oss_init(void) 3084 { 3085 int i; 3086 int err; 3087 3088 /* check device map table */ 3089 for (i = 0; i < SNDRV_CARDS; i++) { 3090 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3091 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3092 i, dsp_map[i]); 3093 dsp_map[i] = 0; 3094 } 3095 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3096 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3097 i, adsp_map[i]); 3098 adsp_map[i] = 1; 3099 } 3100 } 3101 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3102 return err; 3103 return 0; 3104 } 3105 3106 static void __exit alsa_pcm_oss_exit(void) 3107 { 3108 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3109 } 3110 3111 module_init(alsa_pcm_oss_init) 3112 module_exit(alsa_pcm_oss_exit) 3113