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 <linux/compat.h> 37 #include <sound/core.h> 38 #include <sound/minors.h> 39 #include <sound/pcm.h> 40 #include <sound/pcm_params.h> 41 #include "pcm_plugin.h" 42 #include <sound/info.h> 43 #include <linux/soundcard.h> 44 #include <sound/initval.h> 45 #include <sound/mixer_oss.h> 46 47 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 48 49 static int dsp_map[SNDRV_CARDS]; 50 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 51 static bool nonblock_open = 1; 52 53 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 54 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 55 MODULE_LICENSE("GPL"); 56 module_param_array(dsp_map, int, NULL, 0444); 57 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 58 module_param_array(adsp_map, int, NULL, 0444); 59 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 60 module_param(nonblock_open, bool, 0644); 61 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 64 65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 68 69 static inline mm_segment_t snd_enter_user(void) 70 { 71 mm_segment_t fs = get_fs(); 72 set_fs(get_ds()); 73 return fs; 74 } 75 76 static inline void snd_leave_user(mm_segment_t fs) 77 { 78 set_fs(fs); 79 } 80 81 /* 82 * helper functions to process hw_params 83 */ 84 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 85 { 86 int changed = 0; 87 if (i->min < min) { 88 i->min = min; 89 i->openmin = openmin; 90 changed = 1; 91 } else if (i->min == min && !i->openmin && openmin) { 92 i->openmin = 1; 93 changed = 1; 94 } 95 if (i->integer) { 96 if (i->openmin) { 97 i->min++; 98 i->openmin = 0; 99 } 100 } 101 if (snd_interval_checkempty(i)) { 102 snd_interval_none(i); 103 return -EINVAL; 104 } 105 return changed; 106 } 107 108 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 109 { 110 int changed = 0; 111 if (i->max > max) { 112 i->max = max; 113 i->openmax = openmax; 114 changed = 1; 115 } else if (i->max == max && !i->openmax && openmax) { 116 i->openmax = 1; 117 changed = 1; 118 } 119 if (i->integer) { 120 if (i->openmax) { 121 i->max--; 122 i->openmax = 0; 123 } 124 } 125 if (snd_interval_checkempty(i)) { 126 snd_interval_none(i); 127 return -EINVAL; 128 } 129 return changed; 130 } 131 132 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 133 { 134 struct snd_interval t; 135 t.empty = 0; 136 t.min = t.max = val; 137 t.openmin = t.openmax = 0; 138 t.integer = 1; 139 return snd_interval_refine(i, &t); 140 } 141 142 /** 143 * snd_pcm_hw_param_value_min 144 * @params: the hw_params instance 145 * @var: parameter to retrieve 146 * @dir: pointer to the direction (-1,0,1) or NULL 147 * 148 * Return the minimum value for field PAR. 149 */ 150 static unsigned int 151 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 152 snd_pcm_hw_param_t var, int *dir) 153 { 154 if (hw_is_mask(var)) { 155 if (dir) 156 *dir = 0; 157 return snd_mask_min(hw_param_mask_c(params, var)); 158 } 159 if (hw_is_interval(var)) { 160 const struct snd_interval *i = hw_param_interval_c(params, var); 161 if (dir) 162 *dir = i->openmin; 163 return snd_interval_min(i); 164 } 165 return -EINVAL; 166 } 167 168 /** 169 * snd_pcm_hw_param_value_max 170 * @params: the hw_params instance 171 * @var: parameter to retrieve 172 * @dir: pointer to the direction (-1,0,1) or NULL 173 * 174 * Return the maximum value for field PAR. 175 */ 176 static unsigned int 177 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 178 snd_pcm_hw_param_t var, int *dir) 179 { 180 if (hw_is_mask(var)) { 181 if (dir) 182 *dir = 0; 183 return snd_mask_max(hw_param_mask_c(params, var)); 184 } 185 if (hw_is_interval(var)) { 186 const struct snd_interval *i = hw_param_interval_c(params, var); 187 if (dir) 188 *dir = - (int) i->openmax; 189 return snd_interval_max(i); 190 } 191 return -EINVAL; 192 } 193 194 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 195 snd_pcm_hw_param_t var, 196 const struct snd_mask *val) 197 { 198 int changed; 199 changed = snd_mask_refine(hw_param_mask(params, var), val); 200 if (changed) { 201 params->cmask |= 1 << var; 202 params->rmask |= 1 << var; 203 } 204 return changed; 205 } 206 207 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 208 struct snd_pcm_hw_params *params, 209 snd_pcm_hw_param_t var, 210 const struct snd_mask *val) 211 { 212 int changed = _snd_pcm_hw_param_mask(params, var, val); 213 if (changed < 0) 214 return changed; 215 if (params->rmask) { 216 int err = snd_pcm_hw_refine(pcm, params); 217 if (err < 0) 218 return err; 219 } 220 return 0; 221 } 222 223 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 224 snd_pcm_hw_param_t var, unsigned int val, 225 int dir) 226 { 227 int changed; 228 int open = 0; 229 if (dir) { 230 if (dir > 0) { 231 open = 1; 232 } else if (dir < 0) { 233 if (val > 0) { 234 open = 1; 235 val--; 236 } 237 } 238 } 239 if (hw_is_mask(var)) 240 changed = snd_mask_refine_min(hw_param_mask(params, var), 241 val + !!open); 242 else if (hw_is_interval(var)) 243 changed = snd_interval_refine_min(hw_param_interval(params, var), 244 val, open); 245 else 246 return -EINVAL; 247 if (changed) { 248 params->cmask |= 1 << var; 249 params->rmask |= 1 << var; 250 } 251 return changed; 252 } 253 254 /** 255 * snd_pcm_hw_param_min 256 * @pcm: PCM instance 257 * @params: the hw_params instance 258 * @var: parameter to retrieve 259 * @val: minimal value 260 * @dir: pointer to the direction (-1,0,1) or NULL 261 * 262 * Inside configuration space defined by PARAMS remove from PAR all 263 * values < VAL. Reduce configuration space accordingly. 264 * Return new minimum or -EINVAL if the configuration space is empty 265 */ 266 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 267 struct snd_pcm_hw_params *params, 268 snd_pcm_hw_param_t var, unsigned int val, 269 int *dir) 270 { 271 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 272 if (changed < 0) 273 return changed; 274 if (params->rmask) { 275 int err = snd_pcm_hw_refine(pcm, params); 276 if (err < 0) 277 return err; 278 } 279 return snd_pcm_hw_param_value_min(params, var, dir); 280 } 281 282 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 283 snd_pcm_hw_param_t var, unsigned int val, 284 int dir) 285 { 286 int changed; 287 int open = 0; 288 if (dir) { 289 if (dir < 0) { 290 open = 1; 291 } else if (dir > 0) { 292 open = 1; 293 val++; 294 } 295 } 296 if (hw_is_mask(var)) { 297 if (val == 0 && open) { 298 snd_mask_none(hw_param_mask(params, var)); 299 changed = -EINVAL; 300 } else 301 changed = snd_mask_refine_max(hw_param_mask(params, var), 302 val - !!open); 303 } else if (hw_is_interval(var)) 304 changed = snd_interval_refine_max(hw_param_interval(params, var), 305 val, open); 306 else 307 return -EINVAL; 308 if (changed) { 309 params->cmask |= 1 << var; 310 params->rmask |= 1 << var; 311 } 312 return changed; 313 } 314 315 /** 316 * snd_pcm_hw_param_max 317 * @pcm: PCM instance 318 * @params: the hw_params instance 319 * @var: parameter to retrieve 320 * @val: maximal value 321 * @dir: pointer to the direction (-1,0,1) or NULL 322 * 323 * Inside configuration space defined by PARAMS remove from PAR all 324 * values >= VAL + 1. Reduce configuration space accordingly. 325 * Return new maximum or -EINVAL if the configuration space is empty 326 */ 327 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 328 struct snd_pcm_hw_params *params, 329 snd_pcm_hw_param_t var, unsigned int val, 330 int *dir) 331 { 332 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 333 if (changed < 0) 334 return changed; 335 if (params->rmask) { 336 int err = snd_pcm_hw_refine(pcm, params); 337 if (err < 0) 338 return err; 339 } 340 return snd_pcm_hw_param_value_max(params, var, dir); 341 } 342 343 static int boundary_sub(int a, int adir, 344 int b, int bdir, 345 int *c, int *cdir) 346 { 347 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 348 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 349 *c = a - b; 350 *cdir = adir - bdir; 351 if (*cdir == -2) { 352 (*c)--; 353 } else if (*cdir == 2) { 354 (*c)++; 355 } 356 return 0; 357 } 358 359 static int boundary_lt(unsigned int a, int adir, 360 unsigned int b, int bdir) 361 { 362 if (adir < 0) { 363 a--; 364 adir = 1; 365 } else if (adir > 0) 366 adir = 1; 367 if (bdir < 0) { 368 b--; 369 bdir = 1; 370 } else if (bdir > 0) 371 bdir = 1; 372 return a < b || (a == b && adir < bdir); 373 } 374 375 /* Return 1 if min is nearer to best than max */ 376 static int boundary_nearer(int min, int mindir, 377 int best, int bestdir, 378 int max, int maxdir) 379 { 380 int dmin, dmindir; 381 int dmax, dmaxdir; 382 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 383 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 384 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 385 } 386 387 /** 388 * snd_pcm_hw_param_near 389 * @pcm: PCM instance 390 * @params: the hw_params instance 391 * @var: parameter to retrieve 392 * @best: value to set 393 * @dir: pointer to the direction (-1,0,1) or NULL 394 * 395 * Inside configuration space defined by PARAMS set PAR to the available value 396 * nearest to VAL. Reduce configuration space accordingly. 397 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 398 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 399 * Return the value found. 400 */ 401 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 402 struct snd_pcm_hw_params *params, 403 snd_pcm_hw_param_t var, unsigned int best, 404 int *dir) 405 { 406 struct snd_pcm_hw_params *save = NULL; 407 int v; 408 unsigned int saved_min; 409 int last = 0; 410 int min, max; 411 int mindir, maxdir; 412 int valdir = dir ? *dir : 0; 413 /* FIXME */ 414 if (best > INT_MAX) 415 best = INT_MAX; 416 min = max = best; 417 mindir = maxdir = valdir; 418 if (maxdir > 0) 419 maxdir = 0; 420 else if (maxdir == 0) 421 maxdir = -1; 422 else { 423 maxdir = 1; 424 max--; 425 } 426 save = kmalloc(sizeof(*save), GFP_KERNEL); 427 if (save == NULL) 428 return -ENOMEM; 429 *save = *params; 430 saved_min = min; 431 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 432 if (min >= 0) { 433 struct snd_pcm_hw_params *params1; 434 if (max < 0) 435 goto _end; 436 if ((unsigned int)min == saved_min && mindir == valdir) 437 goto _end; 438 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 439 if (params1 == NULL) { 440 kfree(save); 441 return -ENOMEM; 442 } 443 *params1 = *save; 444 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 445 if (max < 0) { 446 kfree(params1); 447 goto _end; 448 } 449 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 450 *params = *params1; 451 last = 1; 452 } 453 kfree(params1); 454 } else { 455 *params = *save; 456 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 457 if (max < 0) { 458 kfree(save); 459 return max; 460 } 461 last = 1; 462 } 463 _end: 464 kfree(save); 465 if (last) 466 v = snd_pcm_hw_param_last(pcm, params, var, dir); 467 else 468 v = snd_pcm_hw_param_first(pcm, params, var, dir); 469 snd_BUG_ON(v < 0); 470 return v; 471 } 472 473 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 474 snd_pcm_hw_param_t var, unsigned int val, 475 int dir) 476 { 477 int changed; 478 if (hw_is_mask(var)) { 479 struct snd_mask *m = hw_param_mask(params, var); 480 if (val == 0 && dir < 0) { 481 changed = -EINVAL; 482 snd_mask_none(m); 483 } else { 484 if (dir > 0) 485 val++; 486 else if (dir < 0) 487 val--; 488 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 489 } 490 } else if (hw_is_interval(var)) { 491 struct snd_interval *i = hw_param_interval(params, var); 492 if (val == 0 && dir < 0) { 493 changed = -EINVAL; 494 snd_interval_none(i); 495 } else if (dir == 0) 496 changed = snd_interval_refine_set(i, val); 497 else { 498 struct snd_interval t; 499 t.openmin = 1; 500 t.openmax = 1; 501 t.empty = 0; 502 t.integer = 0; 503 if (dir < 0) { 504 t.min = val - 1; 505 t.max = val; 506 } else { 507 t.min = val; 508 t.max = val+1; 509 } 510 changed = snd_interval_refine(i, &t); 511 } 512 } else 513 return -EINVAL; 514 if (changed) { 515 params->cmask |= 1 << var; 516 params->rmask |= 1 << var; 517 } 518 return changed; 519 } 520 521 /** 522 * snd_pcm_hw_param_set 523 * @pcm: PCM instance 524 * @params: the hw_params instance 525 * @var: parameter to retrieve 526 * @val: value to set 527 * @dir: pointer to the direction (-1,0,1) or NULL 528 * 529 * Inside configuration space defined by PARAMS remove from PAR all 530 * values != VAL. Reduce configuration space accordingly. 531 * Return VAL or -EINVAL if the configuration space is empty 532 */ 533 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 534 struct snd_pcm_hw_params *params, 535 snd_pcm_hw_param_t var, unsigned int val, 536 int dir) 537 { 538 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 539 if (changed < 0) 540 return changed; 541 if (params->rmask) { 542 int err = snd_pcm_hw_refine(pcm, params); 543 if (err < 0) 544 return err; 545 } 546 return snd_pcm_hw_param_value(params, var, NULL); 547 } 548 549 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 550 snd_pcm_hw_param_t var) 551 { 552 int changed; 553 changed = snd_interval_setinteger(hw_param_interval(params, var)); 554 if (changed) { 555 params->cmask |= 1 << var; 556 params->rmask |= 1 << var; 557 } 558 return changed; 559 } 560 561 /* 562 * plugin 563 */ 564 565 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 566 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 567 { 568 struct snd_pcm_runtime *runtime = substream->runtime; 569 struct snd_pcm_plugin *plugin, *next; 570 571 plugin = runtime->oss.plugin_first; 572 while (plugin) { 573 next = plugin->next; 574 snd_pcm_plugin_free(plugin); 575 plugin = next; 576 } 577 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 578 return 0; 579 } 580 581 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 582 { 583 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 584 plugin->next = runtime->oss.plugin_first; 585 plugin->prev = NULL; 586 if (runtime->oss.plugin_first) { 587 runtime->oss.plugin_first->prev = plugin; 588 runtime->oss.plugin_first = plugin; 589 } else { 590 runtime->oss.plugin_last = 591 runtime->oss.plugin_first = plugin; 592 } 593 return 0; 594 } 595 596 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 597 { 598 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 599 plugin->next = NULL; 600 plugin->prev = runtime->oss.plugin_last; 601 if (runtime->oss.plugin_last) { 602 runtime->oss.plugin_last->next = plugin; 603 runtime->oss.plugin_last = plugin; 604 } else { 605 runtime->oss.plugin_last = 606 runtime->oss.plugin_first = plugin; 607 } 608 return 0; 609 } 610 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 611 612 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 613 { 614 struct snd_pcm_runtime *runtime = substream->runtime; 615 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 616 long bytes = frames_to_bytes(runtime, frames); 617 if (buffer_size == runtime->oss.buffer_bytes) 618 return bytes; 619 #if BITS_PER_LONG >= 64 620 return runtime->oss.buffer_bytes * bytes / buffer_size; 621 #else 622 { 623 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 624 return div_u64(bsize, buffer_size); 625 } 626 #endif 627 } 628 629 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 630 { 631 struct snd_pcm_runtime *runtime = substream->runtime; 632 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 633 if (buffer_size == runtime->oss.buffer_bytes) 634 return bytes_to_frames(runtime, bytes); 635 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 636 } 637 638 static inline 639 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 640 { 641 return runtime->hw_ptr_interrupt; 642 } 643 644 /* define extended formats in the recent OSS versions (if any) */ 645 /* linear formats */ 646 #define AFMT_S32_LE 0x00001000 647 #define AFMT_S32_BE 0x00002000 648 #define AFMT_S24_LE 0x00008000 649 #define AFMT_S24_BE 0x00010000 650 #define AFMT_S24_PACKED 0x00040000 651 652 /* other supported formats */ 653 #define AFMT_FLOAT 0x00004000 654 #define AFMT_SPDIF_RAW 0x00020000 655 656 /* unsupported formats */ 657 #define AFMT_AC3 0x00000400 658 #define AFMT_VORBIS 0x00000800 659 660 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 661 { 662 switch (format) { 663 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 664 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 665 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 666 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 667 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 668 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 669 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 670 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 671 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 672 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 673 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 674 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 675 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 676 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 677 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 678 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 679 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 680 default: return SNDRV_PCM_FORMAT_U8; 681 } 682 } 683 684 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 685 { 686 switch (format) { 687 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 688 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 689 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 690 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 691 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 692 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 693 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 694 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 695 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 696 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 697 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 698 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 699 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 700 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 701 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 702 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 703 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 704 default: return -EINVAL; 705 } 706 } 707 708 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 709 struct snd_pcm_hw_params *oss_params, 710 struct snd_pcm_hw_params *slave_params) 711 { 712 size_t s; 713 size_t oss_buffer_size, oss_period_size, oss_periods; 714 size_t min_period_size, max_period_size; 715 struct snd_pcm_runtime *runtime = substream->runtime; 716 size_t oss_frame_size; 717 718 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 719 params_channels(oss_params) / 8; 720 721 oss_buffer_size = snd_pcm_plug_client_size(substream, 722 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 723 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 724 if (atomic_read(&substream->mmap_count)) { 725 if (oss_buffer_size > runtime->oss.mmap_bytes) 726 oss_buffer_size = runtime->oss.mmap_bytes; 727 } 728 729 if (substream->oss.setup.period_size > 16) 730 oss_period_size = substream->oss.setup.period_size; 731 else if (runtime->oss.fragshift) { 732 oss_period_size = 1 << runtime->oss.fragshift; 733 if (oss_period_size > oss_buffer_size / 2) 734 oss_period_size = oss_buffer_size / 2; 735 } else { 736 int sd; 737 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 738 739 oss_period_size = oss_buffer_size; 740 do { 741 oss_period_size /= 2; 742 } while (oss_period_size > bytes_per_sec); 743 if (runtime->oss.subdivision == 0) { 744 sd = 4; 745 if (oss_period_size / sd > 4096) 746 sd *= 2; 747 if (oss_period_size / sd < 4096) 748 sd = 1; 749 } else 750 sd = runtime->oss.subdivision; 751 oss_period_size /= sd; 752 if (oss_period_size < 16) 753 oss_period_size = 16; 754 } 755 756 min_period_size = snd_pcm_plug_client_size(substream, 757 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 758 min_period_size *= oss_frame_size; 759 min_period_size = roundup_pow_of_two(min_period_size); 760 if (oss_period_size < min_period_size) 761 oss_period_size = min_period_size; 762 763 max_period_size = snd_pcm_plug_client_size(substream, 764 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 765 max_period_size *= oss_frame_size; 766 max_period_size = rounddown_pow_of_two(max_period_size); 767 if (oss_period_size > max_period_size) 768 oss_period_size = max_period_size; 769 770 oss_periods = oss_buffer_size / oss_period_size; 771 772 if (substream->oss.setup.periods > 1) 773 oss_periods = substream->oss.setup.periods; 774 775 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 776 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 777 s = runtime->oss.maxfrags; 778 if (oss_periods > s) 779 oss_periods = s; 780 781 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 782 if (s < 2) 783 s = 2; 784 if (oss_periods < s) 785 oss_periods = s; 786 787 while (oss_period_size * oss_periods > oss_buffer_size) 788 oss_period_size /= 2; 789 790 if (oss_period_size < 16) 791 return -EINVAL; 792 runtime->oss.period_bytes = oss_period_size; 793 runtime->oss.period_frames = 1; 794 runtime->oss.periods = oss_periods; 795 return 0; 796 } 797 798 static int choose_rate(struct snd_pcm_substream *substream, 799 struct snd_pcm_hw_params *params, unsigned int best_rate) 800 { 801 struct snd_interval *it; 802 struct snd_pcm_hw_params *save; 803 unsigned int rate, prev; 804 805 save = kmalloc(sizeof(*save), GFP_KERNEL); 806 if (save == NULL) 807 return -ENOMEM; 808 *save = *params; 809 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 810 811 /* try multiples of the best rate */ 812 rate = best_rate; 813 for (;;) { 814 if (it->max < rate || (it->max == rate && it->openmax)) 815 break; 816 if (it->min < rate || (it->min == rate && !it->openmin)) { 817 int ret; 818 ret = snd_pcm_hw_param_set(substream, params, 819 SNDRV_PCM_HW_PARAM_RATE, 820 rate, 0); 821 if (ret == (int)rate) { 822 kfree(save); 823 return rate; 824 } 825 *params = *save; 826 } 827 prev = rate; 828 rate += best_rate; 829 if (rate <= prev) 830 break; 831 } 832 833 /* not found, use the nearest rate */ 834 kfree(save); 835 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 836 } 837 838 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 839 bool trylock) 840 { 841 struct snd_pcm_runtime *runtime = substream->runtime; 842 struct snd_pcm_hw_params *params, *sparams; 843 struct snd_pcm_sw_params *sw_params; 844 ssize_t oss_buffer_size, oss_period_size; 845 size_t oss_frame_size; 846 int err; 847 int direct; 848 snd_pcm_format_t format, sformat; 849 int n; 850 struct snd_mask sformat_mask; 851 struct snd_mask mask; 852 853 if (trylock) { 854 if (!(mutex_trylock(&runtime->oss.params_lock))) 855 return -EAGAIN; 856 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 857 return -EINTR; 858 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 859 params = kmalloc(sizeof(*params), GFP_KERNEL); 860 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 861 if (!sw_params || !params || !sparams) { 862 err = -ENOMEM; 863 goto failure; 864 } 865 866 if (atomic_read(&substream->mmap_count)) 867 direct = 1; 868 else 869 direct = substream->oss.setup.direct; 870 871 _snd_pcm_hw_params_any(sparams); 872 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 873 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 874 snd_mask_none(&mask); 875 if (atomic_read(&substream->mmap_count)) 876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 877 else { 878 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 879 if (!direct) 880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 881 } 882 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 883 if (err < 0) { 884 pcm_dbg(substream->pcm, "No usable accesses\n"); 885 err = -EINVAL; 886 goto failure; 887 } 888 choose_rate(substream, sparams, runtime->oss.rate); 889 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 890 891 format = snd_pcm_oss_format_from(runtime->oss.format); 892 893 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 894 if (direct) 895 sformat = format; 896 else 897 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 898 899 if ((__force int)sformat < 0 || 900 !snd_mask_test(&sformat_mask, (__force int)sformat)) { 901 for (sformat = (__force snd_pcm_format_t)0; 902 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 903 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 904 if (snd_mask_test(&sformat_mask, (__force int)sformat) && 905 snd_pcm_oss_format_to(sformat) >= 0) 906 break; 907 } 908 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 909 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 910 err = -EINVAL; 911 goto failure; 912 } 913 } 914 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 915 if (err < 0) 916 goto failure; 917 918 if (direct) { 919 memcpy(params, sparams, sizeof(*params)); 920 } else { 921 _snd_pcm_hw_params_any(params); 922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 923 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 925 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 926 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 927 runtime->oss.channels, 0); 928 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 929 runtime->oss.rate, 0); 930 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 931 params_access(params), params_format(params), 932 params_channels(params), params_rate(params)); 933 } 934 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 935 params_access(sparams), params_format(sparams), 936 params_channels(sparams), params_rate(sparams)); 937 938 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 939 params_channels(params) / 8; 940 941 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 942 snd_pcm_oss_plugin_clear(substream); 943 if (!direct) { 944 /* add necessary plugins */ 945 snd_pcm_oss_plugin_clear(substream); 946 if ((err = snd_pcm_plug_format_plugins(substream, 947 params, 948 sparams)) < 0) { 949 pcm_dbg(substream->pcm, 950 "snd_pcm_plug_format_plugins failed: %i\n", err); 951 snd_pcm_oss_plugin_clear(substream); 952 goto failure; 953 } 954 if (runtime->oss.plugin_first) { 955 struct snd_pcm_plugin *plugin; 956 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 957 pcm_dbg(substream->pcm, 958 "snd_pcm_plugin_build_io failed: %i\n", err); 959 snd_pcm_oss_plugin_clear(substream); 960 goto failure; 961 } 962 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 963 err = snd_pcm_plugin_append(plugin); 964 } else { 965 err = snd_pcm_plugin_insert(plugin); 966 } 967 if (err < 0) { 968 snd_pcm_oss_plugin_clear(substream); 969 goto failure; 970 } 971 } 972 } 973 #endif 974 975 err = snd_pcm_oss_period_size(substream, params, sparams); 976 if (err < 0) 977 goto failure; 978 979 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 980 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 981 if (err < 0) 982 goto failure; 983 984 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 985 runtime->oss.periods, NULL); 986 if (err < 0) 987 goto failure; 988 989 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 990 991 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 992 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 993 goto failure; 994 } 995 996 if (runtime->oss.trigger) { 997 sw_params->start_threshold = 1; 998 } else { 999 sw_params->start_threshold = runtime->boundary; 1000 } 1001 if (atomic_read(&substream->mmap_count) || 1002 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1003 sw_params->stop_threshold = runtime->boundary; 1004 else 1005 sw_params->stop_threshold = runtime->buffer_size; 1006 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1007 sw_params->period_step = 1; 1008 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1009 1 : runtime->period_size; 1010 if (atomic_read(&substream->mmap_count) || 1011 substream->oss.setup.nosilence) { 1012 sw_params->silence_threshold = 0; 1013 sw_params->silence_size = 0; 1014 } else { 1015 snd_pcm_uframes_t frames; 1016 frames = runtime->period_size + 16; 1017 if (frames > runtime->buffer_size) 1018 frames = runtime->buffer_size; 1019 sw_params->silence_threshold = frames; 1020 sw_params->silence_size = frames; 1021 } 1022 1023 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1024 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1025 goto failure; 1026 } 1027 1028 runtime->oss.periods = params_periods(sparams); 1029 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1030 if (oss_period_size < 0) { 1031 err = -EINVAL; 1032 goto failure; 1033 } 1034 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1035 if (runtime->oss.plugin_first) { 1036 err = snd_pcm_plug_alloc(substream, oss_period_size); 1037 if (err < 0) 1038 goto failure; 1039 } 1040 #endif 1041 oss_period_size *= oss_frame_size; 1042 1043 oss_buffer_size = oss_period_size * runtime->oss.periods; 1044 if (oss_buffer_size < 0) { 1045 err = -EINVAL; 1046 goto failure; 1047 } 1048 1049 runtime->oss.period_bytes = oss_period_size; 1050 runtime->oss.buffer_bytes = oss_buffer_size; 1051 1052 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1053 runtime->oss.period_bytes, 1054 runtime->oss.buffer_bytes); 1055 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1056 params_period_size(sparams), 1057 params_buffer_size(sparams)); 1058 1059 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1060 runtime->oss.channels = params_channels(params); 1061 runtime->oss.rate = params_rate(params); 1062 1063 vfree(runtime->oss.buffer); 1064 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1065 if (!runtime->oss.buffer) { 1066 err = -ENOMEM; 1067 goto failure; 1068 } 1069 1070 runtime->oss.params = 0; 1071 runtime->oss.prepare = 1; 1072 runtime->oss.buffer_used = 0; 1073 if (runtime->dma_area) 1074 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1075 1076 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1077 1078 err = 0; 1079 failure: 1080 kfree(sw_params); 1081 kfree(params); 1082 kfree(sparams); 1083 mutex_unlock(&runtime->oss.params_lock); 1084 return err; 1085 } 1086 1087 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1088 { 1089 int idx, err; 1090 struct snd_pcm_substream *asubstream = NULL, *substream; 1091 1092 for (idx = 0; idx < 2; idx++) { 1093 substream = pcm_oss_file->streams[idx]; 1094 if (substream == NULL) 1095 continue; 1096 if (asubstream == NULL) 1097 asubstream = substream; 1098 if (substream->runtime->oss.params) { 1099 err = snd_pcm_oss_change_params(substream, false); 1100 if (err < 0) 1101 return err; 1102 } 1103 } 1104 if (!asubstream) 1105 return -EIO; 1106 if (r_substream) 1107 *r_substream = asubstream; 1108 return 0; 1109 } 1110 1111 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1112 { 1113 int err; 1114 struct snd_pcm_runtime *runtime = substream->runtime; 1115 1116 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1117 if (err < 0) { 1118 pcm_dbg(substream->pcm, 1119 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1120 return err; 1121 } 1122 runtime->oss.prepare = 0; 1123 runtime->oss.prev_hw_ptr_period = 0; 1124 runtime->oss.period_ptr = 0; 1125 runtime->oss.buffer_used = 0; 1126 1127 return 0; 1128 } 1129 1130 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1131 { 1132 struct snd_pcm_runtime *runtime; 1133 int err; 1134 1135 if (substream == NULL) 1136 return 0; 1137 runtime = substream->runtime; 1138 if (runtime->oss.params) { 1139 err = snd_pcm_oss_change_params(substream, false); 1140 if (err < 0) 1141 return err; 1142 } 1143 if (runtime->oss.prepare) { 1144 err = snd_pcm_oss_prepare(substream); 1145 if (err < 0) 1146 return err; 1147 } 1148 return 0; 1149 } 1150 1151 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1152 { 1153 struct snd_pcm_runtime *runtime; 1154 snd_pcm_uframes_t frames; 1155 int err = 0; 1156 1157 while (1) { 1158 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1159 if (err < 0) 1160 break; 1161 runtime = substream->runtime; 1162 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1163 break; 1164 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1165 /* until avail(delay) <= buffer_size */ 1166 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1167 frames /= runtime->period_size; 1168 frames *= runtime->period_size; 1169 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1170 if (err < 0) 1171 break; 1172 } 1173 return err; 1174 } 1175 1176 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1177 { 1178 struct snd_pcm_runtime *runtime = substream->runtime; 1179 int ret; 1180 while (1) { 1181 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1182 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1183 #ifdef OSS_DEBUG 1184 pcm_dbg(substream->pcm, 1185 "pcm_oss: write: recovering from %s\n", 1186 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1187 "XRUN" : "SUSPEND"); 1188 #endif 1189 ret = snd_pcm_oss_prepare(substream); 1190 if (ret < 0) 1191 break; 1192 } 1193 if (in_kernel) { 1194 mm_segment_t fs; 1195 fs = snd_enter_user(); 1196 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1197 snd_leave_user(fs); 1198 } else { 1199 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1200 } 1201 if (ret != -EPIPE && ret != -ESTRPIPE) 1202 break; 1203 /* test, if we can't store new data, because the stream */ 1204 /* has not been started */ 1205 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1206 return -EAGAIN; 1207 } 1208 return ret; 1209 } 1210 1211 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1212 { 1213 struct snd_pcm_runtime *runtime = substream->runtime; 1214 snd_pcm_sframes_t delay; 1215 int ret; 1216 while (1) { 1217 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1218 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1219 #ifdef OSS_DEBUG 1220 pcm_dbg(substream->pcm, 1221 "pcm_oss: read: recovering from %s\n", 1222 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1223 "XRUN" : "SUSPEND"); 1224 #endif 1225 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1226 if (ret < 0) 1227 break; 1228 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1229 ret = snd_pcm_oss_prepare(substream); 1230 if (ret < 0) 1231 break; 1232 } 1233 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1234 if (ret < 0) 1235 break; 1236 if (in_kernel) { 1237 mm_segment_t fs; 1238 fs = snd_enter_user(); 1239 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1240 snd_leave_user(fs); 1241 } else { 1242 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1243 } 1244 if (ret == -EPIPE) { 1245 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1246 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1247 if (ret < 0) 1248 break; 1249 } 1250 continue; 1251 } 1252 if (ret != -ESTRPIPE) 1253 break; 1254 } 1255 return ret; 1256 } 1257 1258 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1259 { 1260 struct snd_pcm_runtime *runtime = substream->runtime; 1261 int ret; 1262 while (1) { 1263 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1264 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1265 #ifdef OSS_DEBUG 1266 pcm_dbg(substream->pcm, 1267 "pcm_oss: writev: recovering from %s\n", 1268 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1269 "XRUN" : "SUSPEND"); 1270 #endif 1271 ret = snd_pcm_oss_prepare(substream); 1272 if (ret < 0) 1273 break; 1274 } 1275 if (in_kernel) { 1276 mm_segment_t fs; 1277 fs = snd_enter_user(); 1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1279 snd_leave_user(fs); 1280 } else { 1281 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1282 } 1283 if (ret != -EPIPE && ret != -ESTRPIPE) 1284 break; 1285 1286 /* test, if we can't store new data, because the stream */ 1287 /* has not been started */ 1288 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1289 return -EAGAIN; 1290 } 1291 return ret; 1292 } 1293 1294 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1295 { 1296 struct snd_pcm_runtime *runtime = substream->runtime; 1297 int ret; 1298 while (1) { 1299 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1300 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1301 #ifdef OSS_DEBUG 1302 pcm_dbg(substream->pcm, 1303 "pcm_oss: readv: recovering from %s\n", 1304 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1305 "XRUN" : "SUSPEND"); 1306 #endif 1307 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1308 if (ret < 0) 1309 break; 1310 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1311 ret = snd_pcm_oss_prepare(substream); 1312 if (ret < 0) 1313 break; 1314 } 1315 if (in_kernel) { 1316 mm_segment_t fs; 1317 fs = snd_enter_user(); 1318 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1319 snd_leave_user(fs); 1320 } else { 1321 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1322 } 1323 if (ret != -EPIPE && ret != -ESTRPIPE) 1324 break; 1325 } 1326 return ret; 1327 } 1328 1329 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1330 { 1331 struct snd_pcm_runtime *runtime = substream->runtime; 1332 snd_pcm_sframes_t frames, frames1; 1333 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1334 if (runtime->oss.plugin_first) { 1335 struct snd_pcm_plugin_channel *channels; 1336 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1337 if (!in_kernel) { 1338 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1339 return -EFAULT; 1340 buf = runtime->oss.buffer; 1341 } 1342 frames = bytes / oss_frame_bytes; 1343 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1344 if (frames1 < 0) 1345 return frames1; 1346 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1347 if (frames1 <= 0) 1348 return frames1; 1349 bytes = frames1 * oss_frame_bytes; 1350 } else 1351 #endif 1352 { 1353 frames = bytes_to_frames(runtime, bytes); 1354 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1355 if (frames1 <= 0) 1356 return frames1; 1357 bytes = frames_to_bytes(runtime, frames1); 1358 } 1359 return bytes; 1360 } 1361 1362 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1363 { 1364 size_t xfer = 0; 1365 ssize_t tmp; 1366 struct snd_pcm_runtime *runtime = substream->runtime; 1367 1368 if (atomic_read(&substream->mmap_count)) 1369 return -ENXIO; 1370 1371 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1372 return tmp; 1373 mutex_lock(&runtime->oss.params_lock); 1374 while (bytes > 0) { 1375 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1376 tmp = bytes; 1377 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1378 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1379 if (tmp > 0) { 1380 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1381 tmp = -EFAULT; 1382 goto err; 1383 } 1384 } 1385 runtime->oss.buffer_used += tmp; 1386 buf += tmp; 1387 bytes -= tmp; 1388 xfer += tmp; 1389 if (substream->oss.setup.partialfrag || 1390 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1391 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1392 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1393 if (tmp <= 0) 1394 goto err; 1395 runtime->oss.bytes += tmp; 1396 runtime->oss.period_ptr += tmp; 1397 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1398 if (runtime->oss.period_ptr == 0 || 1399 runtime->oss.period_ptr == runtime->oss.buffer_used) 1400 runtime->oss.buffer_used = 0; 1401 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1402 tmp = -EAGAIN; 1403 goto err; 1404 } 1405 } 1406 } else { 1407 tmp = snd_pcm_oss_write2(substream, 1408 (const char __force *)buf, 1409 runtime->oss.period_bytes, 0); 1410 if (tmp <= 0) 1411 goto err; 1412 runtime->oss.bytes += tmp; 1413 buf += tmp; 1414 bytes -= tmp; 1415 xfer += tmp; 1416 if ((substream->f_flags & O_NONBLOCK) != 0 && 1417 tmp != runtime->oss.period_bytes) 1418 break; 1419 } 1420 } 1421 mutex_unlock(&runtime->oss.params_lock); 1422 return xfer; 1423 1424 err: 1425 mutex_unlock(&runtime->oss.params_lock); 1426 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1427 } 1428 1429 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1430 { 1431 struct snd_pcm_runtime *runtime = substream->runtime; 1432 snd_pcm_sframes_t frames, frames1; 1433 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1434 char __user *final_dst = (char __force __user *)buf; 1435 if (runtime->oss.plugin_first) { 1436 struct snd_pcm_plugin_channel *channels; 1437 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1438 if (!in_kernel) 1439 buf = runtime->oss.buffer; 1440 frames = bytes / oss_frame_bytes; 1441 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1442 if (frames1 < 0) 1443 return frames1; 1444 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1445 if (frames1 <= 0) 1446 return frames1; 1447 bytes = frames1 * oss_frame_bytes; 1448 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1449 return -EFAULT; 1450 } else 1451 #endif 1452 { 1453 frames = bytes_to_frames(runtime, bytes); 1454 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1455 if (frames1 <= 0) 1456 return frames1; 1457 bytes = frames_to_bytes(runtime, frames1); 1458 } 1459 return bytes; 1460 } 1461 1462 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1463 { 1464 size_t xfer = 0; 1465 ssize_t tmp; 1466 struct snd_pcm_runtime *runtime = substream->runtime; 1467 1468 if (atomic_read(&substream->mmap_count)) 1469 return -ENXIO; 1470 1471 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1472 return tmp; 1473 mutex_lock(&runtime->oss.params_lock); 1474 while (bytes > 0) { 1475 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1476 if (runtime->oss.buffer_used == 0) { 1477 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1478 if (tmp <= 0) 1479 goto err; 1480 runtime->oss.bytes += tmp; 1481 runtime->oss.period_ptr = tmp; 1482 runtime->oss.buffer_used = tmp; 1483 } 1484 tmp = bytes; 1485 if ((size_t) tmp > runtime->oss.buffer_used) 1486 tmp = runtime->oss.buffer_used; 1487 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1488 tmp = -EFAULT; 1489 goto err; 1490 } 1491 buf += tmp; 1492 bytes -= tmp; 1493 xfer += tmp; 1494 runtime->oss.buffer_used -= tmp; 1495 } else { 1496 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1497 runtime->oss.period_bytes, 0); 1498 if (tmp <= 0) 1499 goto err; 1500 runtime->oss.bytes += tmp; 1501 buf += tmp; 1502 bytes -= tmp; 1503 xfer += tmp; 1504 } 1505 } 1506 mutex_unlock(&runtime->oss.params_lock); 1507 return xfer; 1508 1509 err: 1510 mutex_unlock(&runtime->oss.params_lock); 1511 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1512 } 1513 1514 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1515 { 1516 struct snd_pcm_substream *substream; 1517 struct snd_pcm_runtime *runtime; 1518 int i; 1519 1520 for (i = 0; i < 2; i++) { 1521 substream = pcm_oss_file->streams[i]; 1522 if (!substream) 1523 continue; 1524 runtime = substream->runtime; 1525 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1526 runtime->oss.prepare = 1; 1527 runtime->oss.buffer_used = 0; 1528 runtime->oss.prev_hw_ptr_period = 0; 1529 runtime->oss.period_ptr = 0; 1530 } 1531 return 0; 1532 } 1533 1534 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1535 { 1536 struct snd_pcm_substream *substream; 1537 int err; 1538 1539 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1540 if (substream != NULL) { 1541 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1542 return err; 1543 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1544 } 1545 /* note: all errors from the start action are ignored */ 1546 /* OSS apps do not know, how to handle them */ 1547 return 0; 1548 } 1549 1550 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1551 { 1552 struct snd_pcm_runtime *runtime; 1553 ssize_t result = 0; 1554 snd_pcm_state_t state; 1555 long res; 1556 wait_queue_t wait; 1557 1558 runtime = substream->runtime; 1559 init_waitqueue_entry(&wait, current); 1560 add_wait_queue(&runtime->sleep, &wait); 1561 #ifdef OSS_DEBUG 1562 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1563 #endif 1564 while (1) { 1565 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1566 if (result > 0) { 1567 runtime->oss.buffer_used = 0; 1568 result = 0; 1569 break; 1570 } 1571 if (result != 0 && result != -EAGAIN) 1572 break; 1573 result = 0; 1574 set_current_state(TASK_INTERRUPTIBLE); 1575 snd_pcm_stream_lock_irq(substream); 1576 state = runtime->status->state; 1577 snd_pcm_stream_unlock_irq(substream); 1578 if (state != SNDRV_PCM_STATE_RUNNING) { 1579 set_current_state(TASK_RUNNING); 1580 break; 1581 } 1582 res = schedule_timeout(10 * HZ); 1583 if (signal_pending(current)) { 1584 result = -ERESTARTSYS; 1585 break; 1586 } 1587 if (res == 0) { 1588 pcm_err(substream->pcm, 1589 "OSS sync error - DMA timeout\n"); 1590 result = -EIO; 1591 break; 1592 } 1593 } 1594 remove_wait_queue(&runtime->sleep, &wait); 1595 return result; 1596 } 1597 1598 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1599 { 1600 int err = 0; 1601 unsigned int saved_f_flags; 1602 struct snd_pcm_substream *substream; 1603 struct snd_pcm_runtime *runtime; 1604 snd_pcm_format_t format; 1605 unsigned long width; 1606 size_t size; 1607 1608 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1609 if (substream != NULL) { 1610 runtime = substream->runtime; 1611 if (atomic_read(&substream->mmap_count)) 1612 goto __direct; 1613 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1614 return err; 1615 format = snd_pcm_oss_format_from(runtime->oss.format); 1616 width = snd_pcm_format_physical_width(format); 1617 mutex_lock(&runtime->oss.params_lock); 1618 if (runtime->oss.buffer_used > 0) { 1619 #ifdef OSS_DEBUG 1620 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1621 #endif 1622 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1623 snd_pcm_format_set_silence(format, 1624 runtime->oss.buffer + runtime->oss.buffer_used, 1625 size); 1626 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1627 if (err < 0) { 1628 mutex_unlock(&runtime->oss.params_lock); 1629 return err; 1630 } 1631 } else if (runtime->oss.period_ptr > 0) { 1632 #ifdef OSS_DEBUG 1633 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1634 #endif 1635 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1636 snd_pcm_format_set_silence(format, 1637 runtime->oss.buffer, 1638 size * 8 / width); 1639 err = snd_pcm_oss_sync1(substream, size); 1640 if (err < 0) { 1641 mutex_unlock(&runtime->oss.params_lock); 1642 return err; 1643 } 1644 } 1645 /* 1646 * The ALSA's period might be a bit large than OSS one. 1647 * Fill the remain portion of ALSA period with zeros. 1648 */ 1649 size = runtime->control->appl_ptr % runtime->period_size; 1650 if (size > 0) { 1651 size = runtime->period_size - size; 1652 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1653 size = (runtime->frame_bits * size) / 8; 1654 while (size > 0) { 1655 mm_segment_t fs; 1656 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1657 size -= size1; 1658 size1 *= 8; 1659 size1 /= runtime->sample_bits; 1660 snd_pcm_format_set_silence(runtime->format, 1661 runtime->oss.buffer, 1662 size1); 1663 size1 /= runtime->channels; /* frames */ 1664 fs = snd_enter_user(); 1665 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1); 1666 snd_leave_user(fs); 1667 } 1668 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1669 void __user *buffers[runtime->channels]; 1670 memset(buffers, 0, runtime->channels * sizeof(void *)); 1671 snd_pcm_lib_writev(substream, buffers, size); 1672 } 1673 } 1674 mutex_unlock(&runtime->oss.params_lock); 1675 /* 1676 * finish sync: drain the buffer 1677 */ 1678 __direct: 1679 saved_f_flags = substream->f_flags; 1680 substream->f_flags &= ~O_NONBLOCK; 1681 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1682 substream->f_flags = saved_f_flags; 1683 if (err < 0) 1684 return err; 1685 runtime->oss.prepare = 1; 1686 } 1687 1688 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1689 if (substream != NULL) { 1690 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1691 return err; 1692 runtime = substream->runtime; 1693 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1694 if (err < 0) 1695 return err; 1696 runtime->oss.buffer_used = 0; 1697 runtime->oss.prepare = 1; 1698 } 1699 return 0; 1700 } 1701 1702 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1703 { 1704 int idx; 1705 1706 for (idx = 1; idx >= 0; --idx) { 1707 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1708 struct snd_pcm_runtime *runtime; 1709 if (substream == NULL) 1710 continue; 1711 runtime = substream->runtime; 1712 if (rate < 1000) 1713 rate = 1000; 1714 else if (rate > 192000) 1715 rate = 192000; 1716 if (runtime->oss.rate != rate) { 1717 runtime->oss.params = 1; 1718 runtime->oss.rate = rate; 1719 } 1720 } 1721 return snd_pcm_oss_get_rate(pcm_oss_file); 1722 } 1723 1724 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1725 { 1726 struct snd_pcm_substream *substream; 1727 int err; 1728 1729 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1730 return err; 1731 return substream->runtime->oss.rate; 1732 } 1733 1734 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1735 { 1736 int idx; 1737 if (channels < 1) 1738 channels = 1; 1739 if (channels > 128) 1740 return -EINVAL; 1741 for (idx = 1; idx >= 0; --idx) { 1742 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1743 struct snd_pcm_runtime *runtime; 1744 if (substream == NULL) 1745 continue; 1746 runtime = substream->runtime; 1747 if (runtime->oss.channels != channels) { 1748 runtime->oss.params = 1; 1749 runtime->oss.channels = channels; 1750 } 1751 } 1752 return snd_pcm_oss_get_channels(pcm_oss_file); 1753 } 1754 1755 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1756 { 1757 struct snd_pcm_substream *substream; 1758 int err; 1759 1760 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1761 return err; 1762 return substream->runtime->oss.channels; 1763 } 1764 1765 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1766 { 1767 struct snd_pcm_substream *substream; 1768 int err; 1769 1770 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1771 return err; 1772 return substream->runtime->oss.period_bytes; 1773 } 1774 1775 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1776 { 1777 struct snd_pcm_substream *substream; 1778 int err; 1779 int direct; 1780 struct snd_pcm_hw_params *params; 1781 unsigned int formats = 0; 1782 struct snd_mask format_mask; 1783 int fmt; 1784 1785 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1786 return err; 1787 if (atomic_read(&substream->mmap_count)) 1788 direct = 1; 1789 else 1790 direct = substream->oss.setup.direct; 1791 if (!direct) 1792 return AFMT_MU_LAW | AFMT_U8 | 1793 AFMT_S16_LE | AFMT_S16_BE | 1794 AFMT_S8 | AFMT_U16_LE | 1795 AFMT_U16_BE | 1796 AFMT_S32_LE | AFMT_S32_BE | 1797 AFMT_S24_LE | AFMT_S24_BE | 1798 AFMT_S24_PACKED; 1799 params = kmalloc(sizeof(*params), GFP_KERNEL); 1800 if (!params) 1801 return -ENOMEM; 1802 _snd_pcm_hw_params_any(params); 1803 err = snd_pcm_hw_refine(substream, params); 1804 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1805 kfree(params); 1806 if (err < 0) 1807 return err; 1808 for (fmt = 0; fmt < 32; ++fmt) { 1809 if (snd_mask_test(&format_mask, fmt)) { 1810 int f = snd_pcm_oss_format_to(fmt); 1811 if (f >= 0) 1812 formats |= f; 1813 } 1814 } 1815 return formats; 1816 } 1817 1818 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1819 { 1820 int formats, idx; 1821 1822 if (format != AFMT_QUERY) { 1823 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1824 if (formats < 0) 1825 return formats; 1826 if (!(formats & format)) 1827 format = AFMT_U8; 1828 for (idx = 1; idx >= 0; --idx) { 1829 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1830 struct snd_pcm_runtime *runtime; 1831 if (substream == NULL) 1832 continue; 1833 runtime = substream->runtime; 1834 if (runtime->oss.format != format) { 1835 runtime->oss.params = 1; 1836 runtime->oss.format = format; 1837 } 1838 } 1839 } 1840 return snd_pcm_oss_get_format(pcm_oss_file); 1841 } 1842 1843 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1844 { 1845 struct snd_pcm_substream *substream; 1846 int err; 1847 1848 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1849 return err; 1850 return substream->runtime->oss.format; 1851 } 1852 1853 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1854 { 1855 struct snd_pcm_runtime *runtime; 1856 1857 if (substream == NULL) 1858 return 0; 1859 runtime = substream->runtime; 1860 if (subdivide == 0) { 1861 subdivide = runtime->oss.subdivision; 1862 if (subdivide == 0) 1863 subdivide = 1; 1864 return subdivide; 1865 } 1866 if (runtime->oss.subdivision || runtime->oss.fragshift) 1867 return -EINVAL; 1868 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1869 subdivide != 8 && subdivide != 16) 1870 return -EINVAL; 1871 runtime->oss.subdivision = subdivide; 1872 runtime->oss.params = 1; 1873 return subdivide; 1874 } 1875 1876 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1877 { 1878 int err = -EINVAL, idx; 1879 1880 for (idx = 1; idx >= 0; --idx) { 1881 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1882 if (substream == NULL) 1883 continue; 1884 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1885 return err; 1886 } 1887 return err; 1888 } 1889 1890 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1891 { 1892 struct snd_pcm_runtime *runtime; 1893 1894 if (substream == NULL) 1895 return 0; 1896 runtime = substream->runtime; 1897 if (runtime->oss.subdivision || runtime->oss.fragshift) 1898 return -EINVAL; 1899 runtime->oss.fragshift = val & 0xffff; 1900 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1901 if (runtime->oss.fragshift < 4) /* < 16 */ 1902 runtime->oss.fragshift = 4; 1903 if (runtime->oss.maxfrags < 2) 1904 runtime->oss.maxfrags = 2; 1905 runtime->oss.params = 1; 1906 return 0; 1907 } 1908 1909 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1910 { 1911 int err = -EINVAL, idx; 1912 1913 for (idx = 1; idx >= 0; --idx) { 1914 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1915 if (substream == NULL) 1916 continue; 1917 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1918 return err; 1919 } 1920 return err; 1921 } 1922 1923 static int snd_pcm_oss_nonblock(struct file * file) 1924 { 1925 spin_lock(&file->f_lock); 1926 file->f_flags |= O_NONBLOCK; 1927 spin_unlock(&file->f_lock); 1928 return 0; 1929 } 1930 1931 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1932 { 1933 1934 if (substream == NULL) { 1935 res &= ~DSP_CAP_DUPLEX; 1936 return res; 1937 } 1938 #ifdef DSP_CAP_MULTI 1939 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1940 if (substream->pstr->substream_count > 1) 1941 res |= DSP_CAP_MULTI; 1942 #endif 1943 /* DSP_CAP_REALTIME is set all times: */ 1944 /* all ALSA drivers can return actual pointer in ring buffer */ 1945 #if defined(DSP_CAP_REALTIME) && 0 1946 { 1947 struct snd_pcm_runtime *runtime = substream->runtime; 1948 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1949 res &= ~DSP_CAP_REALTIME; 1950 } 1951 #endif 1952 return res; 1953 } 1954 1955 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1956 { 1957 int result, idx; 1958 1959 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1960 for (idx = 0; idx < 2; idx++) { 1961 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1962 result = snd_pcm_oss_get_caps1(substream, result); 1963 } 1964 result |= 0x0001; /* revision - same as SB AWE 64 */ 1965 return result; 1966 } 1967 1968 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 1969 snd_pcm_uframes_t hw_ptr) 1970 { 1971 struct snd_pcm_runtime *runtime = substream->runtime; 1972 snd_pcm_uframes_t appl_ptr; 1973 appl_ptr = hw_ptr + runtime->buffer_size; 1974 appl_ptr %= runtime->boundary; 1975 runtime->control->appl_ptr = appl_ptr; 1976 } 1977 1978 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1979 { 1980 struct snd_pcm_runtime *runtime; 1981 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1982 int err, cmd; 1983 1984 #ifdef OSS_DEBUG 1985 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 1986 #endif 1987 1988 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1989 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1990 1991 if (psubstream) { 1992 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1993 return err; 1994 } 1995 if (csubstream) { 1996 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1997 return err; 1998 } 1999 if (psubstream) { 2000 runtime = psubstream->runtime; 2001 if (trigger & PCM_ENABLE_OUTPUT) { 2002 if (runtime->oss.trigger) 2003 goto _skip1; 2004 if (atomic_read(&psubstream->mmap_count)) 2005 snd_pcm_oss_simulate_fill(psubstream, 2006 get_hw_ptr_period(runtime)); 2007 runtime->oss.trigger = 1; 2008 runtime->start_threshold = 1; 2009 cmd = SNDRV_PCM_IOCTL_START; 2010 } else { 2011 if (!runtime->oss.trigger) 2012 goto _skip1; 2013 runtime->oss.trigger = 0; 2014 runtime->start_threshold = runtime->boundary; 2015 cmd = SNDRV_PCM_IOCTL_DROP; 2016 runtime->oss.prepare = 1; 2017 } 2018 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2019 if (err < 0) 2020 return err; 2021 } 2022 _skip1: 2023 if (csubstream) { 2024 runtime = csubstream->runtime; 2025 if (trigger & PCM_ENABLE_INPUT) { 2026 if (runtime->oss.trigger) 2027 goto _skip2; 2028 runtime->oss.trigger = 1; 2029 runtime->start_threshold = 1; 2030 cmd = SNDRV_PCM_IOCTL_START; 2031 } else { 2032 if (!runtime->oss.trigger) 2033 goto _skip2; 2034 runtime->oss.trigger = 0; 2035 runtime->start_threshold = runtime->boundary; 2036 cmd = SNDRV_PCM_IOCTL_DROP; 2037 runtime->oss.prepare = 1; 2038 } 2039 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2040 if (err < 0) 2041 return err; 2042 } 2043 _skip2: 2044 return 0; 2045 } 2046 2047 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2048 { 2049 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2050 int result = 0; 2051 2052 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2053 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2054 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2055 result |= PCM_ENABLE_OUTPUT; 2056 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2057 result |= PCM_ENABLE_INPUT; 2058 return result; 2059 } 2060 2061 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2062 { 2063 struct snd_pcm_substream *substream; 2064 struct snd_pcm_runtime *runtime; 2065 snd_pcm_sframes_t delay; 2066 int err; 2067 2068 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2069 if (substream == NULL) 2070 return -EINVAL; 2071 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2072 return err; 2073 runtime = substream->runtime; 2074 if (runtime->oss.params || runtime->oss.prepare) 2075 return 0; 2076 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2077 if (err == -EPIPE) 2078 delay = 0; /* hack for broken OSS applications */ 2079 else if (err < 0) 2080 return err; 2081 return snd_pcm_oss_bytes(substream, delay); 2082 } 2083 2084 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2085 { 2086 struct snd_pcm_substream *substream; 2087 struct snd_pcm_runtime *runtime; 2088 snd_pcm_sframes_t delay; 2089 int fixup; 2090 struct count_info info; 2091 int err; 2092 2093 if (_info == NULL) 2094 return -EFAULT; 2095 substream = pcm_oss_file->streams[stream]; 2096 if (substream == NULL) 2097 return -EINVAL; 2098 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2099 return err; 2100 runtime = substream->runtime; 2101 if (runtime->oss.params || runtime->oss.prepare) { 2102 memset(&info, 0, sizeof(info)); 2103 if (copy_to_user(_info, &info, sizeof(info))) 2104 return -EFAULT; 2105 return 0; 2106 } 2107 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2108 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2109 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2110 err = 0; 2111 delay = 0; 2112 fixup = 0; 2113 } else { 2114 fixup = runtime->oss.buffer_used; 2115 } 2116 } else { 2117 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2118 fixup = -runtime->oss.buffer_used; 2119 } 2120 if (err < 0) 2121 return err; 2122 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2123 if (atomic_read(&substream->mmap_count)) { 2124 snd_pcm_sframes_t n; 2125 delay = get_hw_ptr_period(runtime); 2126 n = delay - runtime->oss.prev_hw_ptr_period; 2127 if (n < 0) 2128 n += runtime->boundary; 2129 info.blocks = n / runtime->period_size; 2130 runtime->oss.prev_hw_ptr_period = delay; 2131 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2132 snd_pcm_oss_simulate_fill(substream, delay); 2133 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2134 } else { 2135 delay = snd_pcm_oss_bytes(substream, delay); 2136 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2137 if (substream->oss.setup.buggyptr) 2138 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2139 else 2140 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2141 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2142 } else { 2143 delay += fixup; 2144 info.blocks = delay / runtime->oss.period_bytes; 2145 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2146 } 2147 } 2148 if (copy_to_user(_info, &info, sizeof(info))) 2149 return -EFAULT; 2150 return 0; 2151 } 2152 2153 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2154 { 2155 struct snd_pcm_substream *substream; 2156 struct snd_pcm_runtime *runtime; 2157 snd_pcm_sframes_t avail; 2158 int fixup; 2159 struct audio_buf_info info; 2160 int err; 2161 2162 if (_info == NULL) 2163 return -EFAULT; 2164 substream = pcm_oss_file->streams[stream]; 2165 if (substream == NULL) 2166 return -EINVAL; 2167 runtime = substream->runtime; 2168 2169 if (runtime->oss.params && 2170 (err = snd_pcm_oss_change_params(substream, false)) < 0) 2171 return err; 2172 2173 info.fragsize = runtime->oss.period_bytes; 2174 info.fragstotal = runtime->periods; 2175 if (runtime->oss.prepare) { 2176 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2177 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2178 info.fragments = runtime->oss.periods; 2179 } else { 2180 info.bytes = 0; 2181 info.fragments = 0; 2182 } 2183 } else { 2184 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2185 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2186 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2187 avail = runtime->buffer_size; 2188 err = 0; 2189 fixup = 0; 2190 } else { 2191 avail = runtime->buffer_size - avail; 2192 fixup = -runtime->oss.buffer_used; 2193 } 2194 } else { 2195 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2196 fixup = runtime->oss.buffer_used; 2197 } 2198 if (err < 0) 2199 return err; 2200 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2201 info.fragments = info.bytes / runtime->oss.period_bytes; 2202 } 2203 2204 #ifdef OSS_DEBUG 2205 pcm_dbg(substream->pcm, 2206 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2207 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2208 #endif 2209 if (copy_to_user(_info, &info, sizeof(info))) 2210 return -EFAULT; 2211 return 0; 2212 } 2213 2214 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2215 { 2216 // it won't be probably implemented 2217 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2218 return -EINVAL; 2219 } 2220 2221 static const char *strip_task_path(const char *path) 2222 { 2223 const char *ptr, *ptrl = NULL; 2224 for (ptr = path; *ptr; ptr++) { 2225 if (*ptr == '/') 2226 ptrl = ptr + 1; 2227 } 2228 return ptrl; 2229 } 2230 2231 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2232 const char *task_name, 2233 struct snd_pcm_oss_setup *rsetup) 2234 { 2235 struct snd_pcm_oss_setup *setup; 2236 2237 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2238 do { 2239 for (setup = pcm->streams[stream].oss.setup_list; setup; 2240 setup = setup->next) { 2241 if (!strcmp(setup->task_name, task_name)) 2242 goto out; 2243 } 2244 } while ((task_name = strip_task_path(task_name)) != NULL); 2245 out: 2246 if (setup) 2247 *rsetup = *setup; 2248 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2249 } 2250 2251 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2252 { 2253 struct snd_pcm_runtime *runtime; 2254 runtime = substream->runtime; 2255 vfree(runtime->oss.buffer); 2256 runtime->oss.buffer = NULL; 2257 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2258 snd_pcm_oss_plugin_clear(substream); 2259 #endif 2260 substream->oss.oss = 0; 2261 } 2262 2263 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2264 struct snd_pcm_oss_setup *setup, 2265 int minor) 2266 { 2267 struct snd_pcm_runtime *runtime; 2268 2269 substream->oss.oss = 1; 2270 substream->oss.setup = *setup; 2271 if (setup->nonblock) 2272 substream->f_flags |= O_NONBLOCK; 2273 else if (setup->block) 2274 substream->f_flags &= ~O_NONBLOCK; 2275 runtime = substream->runtime; 2276 runtime->oss.params = 1; 2277 runtime->oss.trigger = 1; 2278 runtime->oss.rate = 8000; 2279 mutex_init(&runtime->oss.params_lock); 2280 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2281 case SNDRV_MINOR_OSS_PCM_8: 2282 runtime->oss.format = AFMT_U8; 2283 break; 2284 case SNDRV_MINOR_OSS_PCM_16: 2285 runtime->oss.format = AFMT_S16_LE; 2286 break; 2287 default: 2288 runtime->oss.format = AFMT_MU_LAW; 2289 } 2290 runtime->oss.channels = 1; 2291 runtime->oss.fragshift = 0; 2292 runtime->oss.maxfrags = 0; 2293 runtime->oss.subdivision = 0; 2294 substream->pcm_release = snd_pcm_oss_release_substream; 2295 } 2296 2297 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2298 { 2299 int cidx; 2300 if (!pcm_oss_file) 2301 return 0; 2302 for (cidx = 0; cidx < 2; ++cidx) { 2303 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2304 if (substream) 2305 snd_pcm_release_substream(substream); 2306 } 2307 kfree(pcm_oss_file); 2308 return 0; 2309 } 2310 2311 static int snd_pcm_oss_open_file(struct file *file, 2312 struct snd_pcm *pcm, 2313 struct snd_pcm_oss_file **rpcm_oss_file, 2314 int minor, 2315 struct snd_pcm_oss_setup *setup) 2316 { 2317 int idx, err; 2318 struct snd_pcm_oss_file *pcm_oss_file; 2319 struct snd_pcm_substream *substream; 2320 fmode_t f_mode = file->f_mode; 2321 2322 if (rpcm_oss_file) 2323 *rpcm_oss_file = NULL; 2324 2325 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2326 if (pcm_oss_file == NULL) 2327 return -ENOMEM; 2328 2329 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2330 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2331 f_mode = FMODE_WRITE; 2332 2333 file->f_flags &= ~O_APPEND; 2334 for (idx = 0; idx < 2; idx++) { 2335 if (setup[idx].disable) 2336 continue; 2337 if (! pcm->streams[idx].substream_count) 2338 continue; /* no matching substream */ 2339 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2340 if (! (f_mode & FMODE_WRITE)) 2341 continue; 2342 } else { 2343 if (! (f_mode & FMODE_READ)) 2344 continue; 2345 } 2346 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2347 if (err < 0) { 2348 snd_pcm_oss_release_file(pcm_oss_file); 2349 return err; 2350 } 2351 2352 pcm_oss_file->streams[idx] = substream; 2353 substream->file = pcm_oss_file; 2354 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2355 } 2356 2357 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2358 snd_pcm_oss_release_file(pcm_oss_file); 2359 return -EINVAL; 2360 } 2361 2362 file->private_data = pcm_oss_file; 2363 if (rpcm_oss_file) 2364 *rpcm_oss_file = pcm_oss_file; 2365 return 0; 2366 } 2367 2368 2369 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2370 { 2371 unsigned int idx; 2372 2373 if (snd_BUG_ON(!task || !name || size < 2)) 2374 return -EINVAL; 2375 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2376 name[idx] = task->comm[idx]; 2377 name[idx] = '\0'; 2378 return 0; 2379 } 2380 2381 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2382 { 2383 int err; 2384 char task_name[32]; 2385 struct snd_pcm *pcm; 2386 struct snd_pcm_oss_file *pcm_oss_file; 2387 struct snd_pcm_oss_setup setup[2]; 2388 int nonblock; 2389 wait_queue_t wait; 2390 2391 err = nonseekable_open(inode, file); 2392 if (err < 0) 2393 return err; 2394 2395 pcm = snd_lookup_oss_minor_data(iminor(inode), 2396 SNDRV_OSS_DEVICE_TYPE_PCM); 2397 if (pcm == NULL) { 2398 err = -ENODEV; 2399 goto __error1; 2400 } 2401 err = snd_card_file_add(pcm->card, file); 2402 if (err < 0) 2403 goto __error1; 2404 if (!try_module_get(pcm->card->module)) { 2405 err = -EFAULT; 2406 goto __error2; 2407 } 2408 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2409 err = -EFAULT; 2410 goto __error; 2411 } 2412 memset(setup, 0, sizeof(setup)); 2413 if (file->f_mode & FMODE_WRITE) 2414 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2415 task_name, &setup[0]); 2416 if (file->f_mode & FMODE_READ) 2417 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2418 task_name, &setup[1]); 2419 2420 nonblock = !!(file->f_flags & O_NONBLOCK); 2421 if (!nonblock) 2422 nonblock = nonblock_open; 2423 2424 init_waitqueue_entry(&wait, current); 2425 add_wait_queue(&pcm->open_wait, &wait); 2426 mutex_lock(&pcm->open_mutex); 2427 while (1) { 2428 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2429 iminor(inode), setup); 2430 if (err >= 0) 2431 break; 2432 if (err == -EAGAIN) { 2433 if (nonblock) { 2434 err = -EBUSY; 2435 break; 2436 } 2437 } else 2438 break; 2439 set_current_state(TASK_INTERRUPTIBLE); 2440 mutex_unlock(&pcm->open_mutex); 2441 schedule(); 2442 mutex_lock(&pcm->open_mutex); 2443 if (pcm->card->shutdown) { 2444 err = -ENODEV; 2445 break; 2446 } 2447 if (signal_pending(current)) { 2448 err = -ERESTARTSYS; 2449 break; 2450 } 2451 } 2452 remove_wait_queue(&pcm->open_wait, &wait); 2453 mutex_unlock(&pcm->open_mutex); 2454 if (err < 0) 2455 goto __error; 2456 snd_card_unref(pcm->card); 2457 return err; 2458 2459 __error: 2460 module_put(pcm->card->module); 2461 __error2: 2462 snd_card_file_remove(pcm->card, file); 2463 __error1: 2464 if (pcm) 2465 snd_card_unref(pcm->card); 2466 return err; 2467 } 2468 2469 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2470 { 2471 struct snd_pcm *pcm; 2472 struct snd_pcm_substream *substream; 2473 struct snd_pcm_oss_file *pcm_oss_file; 2474 2475 pcm_oss_file = file->private_data; 2476 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2477 if (substream == NULL) 2478 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2479 if (snd_BUG_ON(!substream)) 2480 return -ENXIO; 2481 pcm = substream->pcm; 2482 if (!pcm->card->shutdown) 2483 snd_pcm_oss_sync(pcm_oss_file); 2484 mutex_lock(&pcm->open_mutex); 2485 snd_pcm_oss_release_file(pcm_oss_file); 2486 mutex_unlock(&pcm->open_mutex); 2487 wake_up(&pcm->open_wait); 2488 module_put(pcm->card->module); 2489 snd_card_file_remove(pcm->card, file); 2490 return 0; 2491 } 2492 2493 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2494 { 2495 struct snd_pcm_oss_file *pcm_oss_file; 2496 int __user *p = (int __user *)arg; 2497 int res; 2498 2499 pcm_oss_file = file->private_data; 2500 if (cmd == OSS_GETVERSION) 2501 return put_user(SNDRV_OSS_VERSION, p); 2502 if (cmd == OSS_ALSAEMULVER) 2503 return put_user(1, p); 2504 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2505 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2506 struct snd_pcm_substream *substream; 2507 int idx; 2508 for (idx = 0; idx < 2; ++idx) { 2509 substream = pcm_oss_file->streams[idx]; 2510 if (substream != NULL) 2511 break; 2512 } 2513 if (snd_BUG_ON(idx >= 2)) 2514 return -ENXIO; 2515 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2516 } 2517 #endif 2518 if (((cmd >> 8) & 0xff) != 'P') 2519 return -EINVAL; 2520 #ifdef OSS_DEBUG 2521 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2522 #endif 2523 switch (cmd) { 2524 case SNDCTL_DSP_RESET: 2525 return snd_pcm_oss_reset(pcm_oss_file); 2526 case SNDCTL_DSP_SYNC: 2527 return snd_pcm_oss_sync(pcm_oss_file); 2528 case SNDCTL_DSP_SPEED: 2529 if (get_user(res, p)) 2530 return -EFAULT; 2531 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2532 return res; 2533 return put_user(res, p); 2534 case SOUND_PCM_READ_RATE: 2535 res = snd_pcm_oss_get_rate(pcm_oss_file); 2536 if (res < 0) 2537 return res; 2538 return put_user(res, p); 2539 case SNDCTL_DSP_STEREO: 2540 if (get_user(res, p)) 2541 return -EFAULT; 2542 res = res > 0 ? 2 : 1; 2543 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2544 return res; 2545 return put_user(--res, p); 2546 case SNDCTL_DSP_GETBLKSIZE: 2547 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2548 if (res < 0) 2549 return res; 2550 return put_user(res, p); 2551 case SNDCTL_DSP_SETFMT: 2552 if (get_user(res, p)) 2553 return -EFAULT; 2554 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2555 if (res < 0) 2556 return res; 2557 return put_user(res, p); 2558 case SOUND_PCM_READ_BITS: 2559 res = snd_pcm_oss_get_format(pcm_oss_file); 2560 if (res < 0) 2561 return res; 2562 return put_user(res, p); 2563 case SNDCTL_DSP_CHANNELS: 2564 if (get_user(res, p)) 2565 return -EFAULT; 2566 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2567 if (res < 0) 2568 return res; 2569 return put_user(res, p); 2570 case SOUND_PCM_READ_CHANNELS: 2571 res = snd_pcm_oss_get_channels(pcm_oss_file); 2572 if (res < 0) 2573 return res; 2574 return put_user(res, p); 2575 case SOUND_PCM_WRITE_FILTER: 2576 case SOUND_PCM_READ_FILTER: 2577 return -EIO; 2578 case SNDCTL_DSP_POST: 2579 return snd_pcm_oss_post(pcm_oss_file); 2580 case SNDCTL_DSP_SUBDIVIDE: 2581 if (get_user(res, p)) 2582 return -EFAULT; 2583 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2584 if (res < 0) 2585 return res; 2586 return put_user(res, p); 2587 case SNDCTL_DSP_SETFRAGMENT: 2588 if (get_user(res, p)) 2589 return -EFAULT; 2590 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2591 case SNDCTL_DSP_GETFMTS: 2592 res = snd_pcm_oss_get_formats(pcm_oss_file); 2593 if (res < 0) 2594 return res; 2595 return put_user(res, p); 2596 case SNDCTL_DSP_GETOSPACE: 2597 case SNDCTL_DSP_GETISPACE: 2598 return snd_pcm_oss_get_space(pcm_oss_file, 2599 cmd == SNDCTL_DSP_GETISPACE ? 2600 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2601 (struct audio_buf_info __user *) arg); 2602 case SNDCTL_DSP_NONBLOCK: 2603 return snd_pcm_oss_nonblock(file); 2604 case SNDCTL_DSP_GETCAPS: 2605 res = snd_pcm_oss_get_caps(pcm_oss_file); 2606 if (res < 0) 2607 return res; 2608 return put_user(res, p); 2609 case SNDCTL_DSP_GETTRIGGER: 2610 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2611 if (res < 0) 2612 return res; 2613 return put_user(res, p); 2614 case SNDCTL_DSP_SETTRIGGER: 2615 if (get_user(res, p)) 2616 return -EFAULT; 2617 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2618 case SNDCTL_DSP_GETIPTR: 2619 case SNDCTL_DSP_GETOPTR: 2620 return snd_pcm_oss_get_ptr(pcm_oss_file, 2621 cmd == SNDCTL_DSP_GETIPTR ? 2622 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2623 (struct count_info __user *) arg); 2624 case SNDCTL_DSP_MAPINBUF: 2625 case SNDCTL_DSP_MAPOUTBUF: 2626 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2627 cmd == SNDCTL_DSP_MAPINBUF ? 2628 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2629 (struct buffmem_desc __user *) arg); 2630 case SNDCTL_DSP_SETSYNCRO: 2631 /* stop DMA now.. */ 2632 return 0; 2633 case SNDCTL_DSP_SETDUPLEX: 2634 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2635 return 0; 2636 return -EIO; 2637 case SNDCTL_DSP_GETODELAY: 2638 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2639 if (res < 0) { 2640 /* it's for sure, some broken apps don't check for error codes */ 2641 put_user(0, p); 2642 return res; 2643 } 2644 return put_user(res, p); 2645 case SNDCTL_DSP_PROFILE: 2646 return 0; /* silently ignore */ 2647 default: 2648 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2649 } 2650 return -EINVAL; 2651 } 2652 2653 #ifdef CONFIG_COMPAT 2654 /* all compatible */ 2655 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2656 unsigned long arg) 2657 { 2658 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2659 } 2660 #else 2661 #define snd_pcm_oss_ioctl_compat NULL 2662 #endif 2663 2664 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2665 { 2666 struct snd_pcm_oss_file *pcm_oss_file; 2667 struct snd_pcm_substream *substream; 2668 2669 pcm_oss_file = file->private_data; 2670 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2671 if (substream == NULL) 2672 return -ENXIO; 2673 substream->f_flags = file->f_flags & O_NONBLOCK; 2674 #ifndef OSS_DEBUG 2675 return snd_pcm_oss_read1(substream, buf, count); 2676 #else 2677 { 2678 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2679 pcm_dbg(substream->pcm, 2680 "pcm_oss: read %li bytes (returned %li bytes)\n", 2681 (long)count, (long)res); 2682 return res; 2683 } 2684 #endif 2685 } 2686 2687 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2688 { 2689 struct snd_pcm_oss_file *pcm_oss_file; 2690 struct snd_pcm_substream *substream; 2691 long result; 2692 2693 pcm_oss_file = file->private_data; 2694 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2695 if (substream == NULL) 2696 return -ENXIO; 2697 substream->f_flags = file->f_flags & O_NONBLOCK; 2698 result = snd_pcm_oss_write1(substream, buf, count); 2699 #ifdef OSS_DEBUG 2700 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2701 (long)count, (long)result); 2702 #endif 2703 return result; 2704 } 2705 2706 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2707 { 2708 struct snd_pcm_runtime *runtime = substream->runtime; 2709 if (atomic_read(&substream->mmap_count)) 2710 return runtime->oss.prev_hw_ptr_period != 2711 get_hw_ptr_period(runtime); 2712 else 2713 return snd_pcm_playback_avail(runtime) >= 2714 runtime->oss.period_frames; 2715 } 2716 2717 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2718 { 2719 struct snd_pcm_runtime *runtime = substream->runtime; 2720 if (atomic_read(&substream->mmap_count)) 2721 return runtime->oss.prev_hw_ptr_period != 2722 get_hw_ptr_period(runtime); 2723 else 2724 return snd_pcm_capture_avail(runtime) >= 2725 runtime->oss.period_frames; 2726 } 2727 2728 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2729 { 2730 struct snd_pcm_oss_file *pcm_oss_file; 2731 unsigned int mask; 2732 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2733 2734 pcm_oss_file = file->private_data; 2735 2736 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2737 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2738 2739 mask = 0; 2740 if (psubstream != NULL) { 2741 struct snd_pcm_runtime *runtime = psubstream->runtime; 2742 poll_wait(file, &runtime->sleep, wait); 2743 snd_pcm_stream_lock_irq(psubstream); 2744 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2745 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2746 snd_pcm_oss_playback_ready(psubstream))) 2747 mask |= POLLOUT | POLLWRNORM; 2748 snd_pcm_stream_unlock_irq(psubstream); 2749 } 2750 if (csubstream != NULL) { 2751 struct snd_pcm_runtime *runtime = csubstream->runtime; 2752 snd_pcm_state_t ostate; 2753 poll_wait(file, &runtime->sleep, wait); 2754 snd_pcm_stream_lock_irq(csubstream); 2755 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2756 snd_pcm_oss_capture_ready(csubstream)) 2757 mask |= POLLIN | POLLRDNORM; 2758 snd_pcm_stream_unlock_irq(csubstream); 2759 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2760 struct snd_pcm_oss_file ofile; 2761 memset(&ofile, 0, sizeof(ofile)); 2762 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2763 runtime->oss.trigger = 0; 2764 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2765 } 2766 } 2767 2768 return mask; 2769 } 2770 2771 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2772 { 2773 struct snd_pcm_oss_file *pcm_oss_file; 2774 struct snd_pcm_substream *substream = NULL; 2775 struct snd_pcm_runtime *runtime; 2776 int err; 2777 2778 #ifdef OSS_DEBUG 2779 pr_debug("pcm_oss: mmap begin\n"); 2780 #endif 2781 pcm_oss_file = file->private_data; 2782 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2783 case VM_READ | VM_WRITE: 2784 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2785 if (substream) 2786 break; 2787 /* Fall through */ 2788 case VM_READ: 2789 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2790 break; 2791 case VM_WRITE: 2792 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2793 break; 2794 default: 2795 return -EINVAL; 2796 } 2797 /* set VM_READ access as well to fix memset() routines that do 2798 reads before writes (to improve performance) */ 2799 area->vm_flags |= VM_READ; 2800 if (substream == NULL) 2801 return -ENXIO; 2802 runtime = substream->runtime; 2803 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2804 return -EIO; 2805 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2806 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2807 else 2808 return -EIO; 2809 2810 if (runtime->oss.params) { 2811 /* use mutex_trylock() for params_lock for avoiding a deadlock 2812 * between mmap_sem and params_lock taken by 2813 * copy_from/to_user() in snd_pcm_oss_write/read() 2814 */ 2815 err = snd_pcm_oss_change_params(substream, true); 2816 if (err < 0) 2817 return err; 2818 } 2819 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2820 if (runtime->oss.plugin_first != NULL) 2821 return -EIO; 2822 #endif 2823 2824 if (area->vm_pgoff != 0) 2825 return -EINVAL; 2826 2827 err = snd_pcm_mmap_data(substream, file, area); 2828 if (err < 0) 2829 return err; 2830 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2831 runtime->silence_threshold = 0; 2832 runtime->silence_size = 0; 2833 #ifdef OSS_DEBUG 2834 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2835 runtime->oss.mmap_bytes); 2836 #endif 2837 /* In mmap mode we never stop */ 2838 runtime->stop_threshold = runtime->boundary; 2839 2840 return 0; 2841 } 2842 2843 #ifdef CONFIG_SND_VERBOSE_PROCFS 2844 /* 2845 * /proc interface 2846 */ 2847 2848 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2849 struct snd_info_buffer *buffer) 2850 { 2851 struct snd_pcm_str *pstr = entry->private_data; 2852 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2853 mutex_lock(&pstr->oss.setup_mutex); 2854 while (setup) { 2855 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2856 setup->task_name, 2857 setup->periods, 2858 setup->period_size, 2859 setup->disable ? " disable" : "", 2860 setup->direct ? " direct" : "", 2861 setup->block ? " block" : "", 2862 setup->nonblock ? " non-block" : "", 2863 setup->partialfrag ? " partial-frag" : "", 2864 setup->nosilence ? " no-silence" : ""); 2865 setup = setup->next; 2866 } 2867 mutex_unlock(&pstr->oss.setup_mutex); 2868 } 2869 2870 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2871 { 2872 struct snd_pcm_oss_setup *setup, *setupn; 2873 2874 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2875 setup; setup = setupn) { 2876 setupn = setup->next; 2877 kfree(setup->task_name); 2878 kfree(setup); 2879 } 2880 pstr->oss.setup_list = NULL; 2881 } 2882 2883 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2884 struct snd_info_buffer *buffer) 2885 { 2886 struct snd_pcm_str *pstr = entry->private_data; 2887 char line[128], str[32], task_name[32]; 2888 const char *ptr; 2889 int idx1; 2890 struct snd_pcm_oss_setup *setup, *setup1, template; 2891 2892 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2893 mutex_lock(&pstr->oss.setup_mutex); 2894 memset(&template, 0, sizeof(template)); 2895 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2896 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2897 snd_pcm_oss_proc_free_setup_list(pstr); 2898 mutex_unlock(&pstr->oss.setup_mutex); 2899 continue; 2900 } 2901 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2902 if (!strcmp(setup->task_name, task_name)) { 2903 template = *setup; 2904 break; 2905 } 2906 } 2907 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2908 template.periods = simple_strtoul(str, NULL, 10); 2909 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2910 template.period_size = simple_strtoul(str, NULL, 10); 2911 for (idx1 = 31; idx1 >= 0; idx1--) 2912 if (template.period_size & (1 << idx1)) 2913 break; 2914 for (idx1--; idx1 >= 0; idx1--) 2915 template.period_size &= ~(1 << idx1); 2916 do { 2917 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2918 if (!strcmp(str, "disable")) { 2919 template.disable = 1; 2920 } else if (!strcmp(str, "direct")) { 2921 template.direct = 1; 2922 } else if (!strcmp(str, "block")) { 2923 template.block = 1; 2924 } else if (!strcmp(str, "non-block")) { 2925 template.nonblock = 1; 2926 } else if (!strcmp(str, "partial-frag")) { 2927 template.partialfrag = 1; 2928 } else if (!strcmp(str, "no-silence")) { 2929 template.nosilence = 1; 2930 } else if (!strcmp(str, "buggy-ptr")) { 2931 template.buggyptr = 1; 2932 } 2933 } while (*str); 2934 if (setup == NULL) { 2935 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2936 if (! setup) { 2937 buffer->error = -ENOMEM; 2938 mutex_unlock(&pstr->oss.setup_mutex); 2939 return; 2940 } 2941 if (pstr->oss.setup_list == NULL) 2942 pstr->oss.setup_list = setup; 2943 else { 2944 for (setup1 = pstr->oss.setup_list; 2945 setup1->next; setup1 = setup1->next); 2946 setup1->next = setup; 2947 } 2948 template.task_name = kstrdup(task_name, GFP_KERNEL); 2949 if (! template.task_name) { 2950 kfree(setup); 2951 buffer->error = -ENOMEM; 2952 mutex_unlock(&pstr->oss.setup_mutex); 2953 return; 2954 } 2955 } 2956 *setup = template; 2957 mutex_unlock(&pstr->oss.setup_mutex); 2958 } 2959 } 2960 2961 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2962 { 2963 int stream; 2964 for (stream = 0; stream < 2; ++stream) { 2965 struct snd_info_entry *entry; 2966 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2967 if (pstr->substream_count == 0) 2968 continue; 2969 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2970 entry->content = SNDRV_INFO_CONTENT_TEXT; 2971 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2972 entry->c.text.read = snd_pcm_oss_proc_read; 2973 entry->c.text.write = snd_pcm_oss_proc_write; 2974 entry->private_data = pstr; 2975 if (snd_info_register(entry) < 0) { 2976 snd_info_free_entry(entry); 2977 entry = NULL; 2978 } 2979 } 2980 pstr->oss.proc_entry = entry; 2981 } 2982 } 2983 2984 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2985 { 2986 int stream; 2987 for (stream = 0; stream < 2; ++stream) { 2988 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2989 snd_info_free_entry(pstr->oss.proc_entry); 2990 pstr->oss.proc_entry = NULL; 2991 snd_pcm_oss_proc_free_setup_list(pstr); 2992 } 2993 } 2994 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2995 #define snd_pcm_oss_proc_init(pcm) 2996 #define snd_pcm_oss_proc_done(pcm) 2997 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2998 2999 /* 3000 * ENTRY functions 3001 */ 3002 3003 static const struct file_operations snd_pcm_oss_f_reg = 3004 { 3005 .owner = THIS_MODULE, 3006 .read = snd_pcm_oss_read, 3007 .write = snd_pcm_oss_write, 3008 .open = snd_pcm_oss_open, 3009 .release = snd_pcm_oss_release, 3010 .llseek = no_llseek, 3011 .poll = snd_pcm_oss_poll, 3012 .unlocked_ioctl = snd_pcm_oss_ioctl, 3013 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3014 .mmap = snd_pcm_oss_mmap, 3015 }; 3016 3017 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3018 { 3019 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3020 pcm->card, index, &snd_pcm_oss_f_reg, 3021 pcm) < 0) { 3022 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3023 pcm->card->number, pcm->device); 3024 } 3025 } 3026 3027 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3028 { 3029 pcm->oss.reg = 0; 3030 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3031 char name[128]; 3032 int duplex; 3033 register_oss_dsp(pcm, 0); 3034 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3035 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3036 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3037 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3038 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3039 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3040 pcm->card->number, 3041 name); 3042 #endif 3043 pcm->oss.reg++; 3044 pcm->oss.reg_mask |= 1; 3045 } 3046 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3047 register_oss_dsp(pcm, 1); 3048 pcm->oss.reg++; 3049 pcm->oss.reg_mask |= 2; 3050 } 3051 3052 if (pcm->oss.reg) 3053 snd_pcm_oss_proc_init(pcm); 3054 3055 return 0; 3056 } 3057 3058 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3059 { 3060 if (pcm->oss.reg) { 3061 if (pcm->oss.reg_mask & 1) { 3062 pcm->oss.reg_mask &= ~1; 3063 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3064 pcm->card, 0); 3065 } 3066 if (pcm->oss.reg_mask & 2) { 3067 pcm->oss.reg_mask &= ~2; 3068 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3069 pcm->card, 1); 3070 } 3071 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3072 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3073 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3074 #endif 3075 } 3076 pcm->oss.reg = 0; 3077 } 3078 return 0; 3079 } 3080 3081 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3082 { 3083 snd_pcm_oss_disconnect_minor(pcm); 3084 snd_pcm_oss_proc_done(pcm); 3085 return 0; 3086 } 3087 3088 static struct snd_pcm_notify snd_pcm_oss_notify = 3089 { 3090 .n_register = snd_pcm_oss_register_minor, 3091 .n_disconnect = snd_pcm_oss_disconnect_minor, 3092 .n_unregister = snd_pcm_oss_unregister_minor, 3093 }; 3094 3095 static int __init alsa_pcm_oss_init(void) 3096 { 3097 int i; 3098 int err; 3099 3100 /* check device map table */ 3101 for (i = 0; i < SNDRV_CARDS; i++) { 3102 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3103 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3104 i, dsp_map[i]); 3105 dsp_map[i] = 0; 3106 } 3107 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3108 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3109 i, adsp_map[i]); 3110 adsp_map[i] = 1; 3111 } 3112 } 3113 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3114 return err; 3115 return 0; 3116 } 3117 3118 static void __exit alsa_pcm_oss_exit(void) 3119 { 3120 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3121 } 3122 3123 module_init(alsa_pcm_oss_init) 3124 module_exit(alsa_pcm_oss_exit) 3125