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/sched/signal.h> 32 #include <linux/time.h> 33 #include <linux/vmalloc.h> 34 #include <linux/module.h> 35 #include <linux/math64.h> 36 #include <linux/string.h> 37 #include <linux/compat.h> 38 #include <sound/core.h> 39 #include <sound/minors.h> 40 #include <sound/pcm.h> 41 #include <sound/pcm_params.h> 42 #include "pcm_plugin.h" 43 #include <sound/info.h> 44 #include <linux/soundcard.h> 45 #include <sound/initval.h> 46 #include <sound/mixer_oss.h> 47 48 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 49 50 static int dsp_map[SNDRV_CARDS]; 51 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 52 static bool nonblock_open = 1; 53 54 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 55 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 56 MODULE_LICENSE("GPL"); 57 module_param_array(dsp_map, int, NULL, 0444); 58 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 59 module_param_array(adsp_map, int, NULL, 0444); 60 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 61 module_param(nonblock_open, bool, 0644); 62 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 64 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 65 66 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 67 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 68 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 69 70 static inline mm_segment_t snd_enter_user(void) 71 { 72 mm_segment_t fs = get_fs(); 73 set_fs(get_ds()); 74 return fs; 75 } 76 77 static inline void snd_leave_user(mm_segment_t fs) 78 { 79 set_fs(fs); 80 } 81 82 /* 83 * helper functions to process hw_params 84 */ 85 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 86 { 87 int changed = 0; 88 if (i->min < min) { 89 i->min = min; 90 i->openmin = openmin; 91 changed = 1; 92 } else if (i->min == min && !i->openmin && openmin) { 93 i->openmin = 1; 94 changed = 1; 95 } 96 if (i->integer) { 97 if (i->openmin) { 98 i->min++; 99 i->openmin = 0; 100 } 101 } 102 if (snd_interval_checkempty(i)) { 103 snd_interval_none(i); 104 return -EINVAL; 105 } 106 return changed; 107 } 108 109 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 110 { 111 int changed = 0; 112 if (i->max > max) { 113 i->max = max; 114 i->openmax = openmax; 115 changed = 1; 116 } else if (i->max == max && !i->openmax && openmax) { 117 i->openmax = 1; 118 changed = 1; 119 } 120 if (i->integer) { 121 if (i->openmax) { 122 i->max--; 123 i->openmax = 0; 124 } 125 } 126 if (snd_interval_checkempty(i)) { 127 snd_interval_none(i); 128 return -EINVAL; 129 } 130 return changed; 131 } 132 133 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 134 { 135 struct snd_interval t; 136 t.empty = 0; 137 t.min = t.max = val; 138 t.openmin = t.openmax = 0; 139 t.integer = 1; 140 return snd_interval_refine(i, &t); 141 } 142 143 /** 144 * snd_pcm_hw_param_value_min 145 * @params: the hw_params instance 146 * @var: parameter to retrieve 147 * @dir: pointer to the direction (-1,0,1) or NULL 148 * 149 * Return the minimum value for field PAR. 150 */ 151 static unsigned int 152 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 153 snd_pcm_hw_param_t var, int *dir) 154 { 155 if (hw_is_mask(var)) { 156 if (dir) 157 *dir = 0; 158 return snd_mask_min(hw_param_mask_c(params, var)); 159 } 160 if (hw_is_interval(var)) { 161 const struct snd_interval *i = hw_param_interval_c(params, var); 162 if (dir) 163 *dir = i->openmin; 164 return snd_interval_min(i); 165 } 166 return -EINVAL; 167 } 168 169 /** 170 * snd_pcm_hw_param_value_max 171 * @params: the hw_params instance 172 * @var: parameter to retrieve 173 * @dir: pointer to the direction (-1,0,1) or NULL 174 * 175 * Return the maximum value for field PAR. 176 */ 177 static unsigned int 178 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 179 snd_pcm_hw_param_t var, int *dir) 180 { 181 if (hw_is_mask(var)) { 182 if (dir) 183 *dir = 0; 184 return snd_mask_max(hw_param_mask_c(params, var)); 185 } 186 if (hw_is_interval(var)) { 187 const struct snd_interval *i = hw_param_interval_c(params, var); 188 if (dir) 189 *dir = - (int) i->openmax; 190 return snd_interval_max(i); 191 } 192 return -EINVAL; 193 } 194 195 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 196 snd_pcm_hw_param_t var, 197 const struct snd_mask *val) 198 { 199 int changed; 200 changed = snd_mask_refine(hw_param_mask(params, var), val); 201 if (changed) { 202 params->cmask |= 1 << var; 203 params->rmask |= 1 << var; 204 } 205 return changed; 206 } 207 208 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 209 struct snd_pcm_hw_params *params, 210 snd_pcm_hw_param_t var, 211 const struct snd_mask *val) 212 { 213 int changed = _snd_pcm_hw_param_mask(params, var, val); 214 if (changed < 0) 215 return changed; 216 if (params->rmask) { 217 int err = snd_pcm_hw_refine(pcm, params); 218 if (err < 0) 219 return err; 220 } 221 return 0; 222 } 223 224 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 225 snd_pcm_hw_param_t var, unsigned int val, 226 int dir) 227 { 228 int changed; 229 int open = 0; 230 if (dir) { 231 if (dir > 0) { 232 open = 1; 233 } else if (dir < 0) { 234 if (val > 0) { 235 open = 1; 236 val--; 237 } 238 } 239 } 240 if (hw_is_mask(var)) 241 changed = snd_mask_refine_min(hw_param_mask(params, var), 242 val + !!open); 243 else if (hw_is_interval(var)) 244 changed = snd_interval_refine_min(hw_param_interval(params, var), 245 val, open); 246 else 247 return -EINVAL; 248 if (changed) { 249 params->cmask |= 1 << var; 250 params->rmask |= 1 << var; 251 } 252 return changed; 253 } 254 255 /** 256 * snd_pcm_hw_param_min 257 * @pcm: PCM instance 258 * @params: the hw_params instance 259 * @var: parameter to retrieve 260 * @val: minimal value 261 * @dir: pointer to the direction (-1,0,1) or NULL 262 * 263 * Inside configuration space defined by PARAMS remove from PAR all 264 * values < VAL. Reduce configuration space accordingly. 265 * Return new minimum or -EINVAL if the configuration space is empty 266 */ 267 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 268 struct snd_pcm_hw_params *params, 269 snd_pcm_hw_param_t var, unsigned int val, 270 int *dir) 271 { 272 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 273 if (changed < 0) 274 return changed; 275 if (params->rmask) { 276 int err = snd_pcm_hw_refine(pcm, params); 277 if (err < 0) 278 return err; 279 } 280 return snd_pcm_hw_param_value_min(params, var, dir); 281 } 282 283 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 284 snd_pcm_hw_param_t var, unsigned int val, 285 int dir) 286 { 287 int changed; 288 int open = 0; 289 if (dir) { 290 if (dir < 0) { 291 open = 1; 292 } else if (dir > 0) { 293 open = 1; 294 val++; 295 } 296 } 297 if (hw_is_mask(var)) { 298 if (val == 0 && open) { 299 snd_mask_none(hw_param_mask(params, var)); 300 changed = -EINVAL; 301 } else 302 changed = snd_mask_refine_max(hw_param_mask(params, var), 303 val - !!open); 304 } else if (hw_is_interval(var)) 305 changed = snd_interval_refine_max(hw_param_interval(params, var), 306 val, open); 307 else 308 return -EINVAL; 309 if (changed) { 310 params->cmask |= 1 << var; 311 params->rmask |= 1 << var; 312 } 313 return changed; 314 } 315 316 /** 317 * snd_pcm_hw_param_max 318 * @pcm: PCM instance 319 * @params: the hw_params instance 320 * @var: parameter to retrieve 321 * @val: maximal value 322 * @dir: pointer to the direction (-1,0,1) or NULL 323 * 324 * Inside configuration space defined by PARAMS remove from PAR all 325 * values >= VAL + 1. Reduce configuration space accordingly. 326 * Return new maximum or -EINVAL if the configuration space is empty 327 */ 328 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 329 struct snd_pcm_hw_params *params, 330 snd_pcm_hw_param_t var, unsigned int val, 331 int *dir) 332 { 333 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 334 if (changed < 0) 335 return changed; 336 if (params->rmask) { 337 int err = snd_pcm_hw_refine(pcm, params); 338 if (err < 0) 339 return err; 340 } 341 return snd_pcm_hw_param_value_max(params, var, dir); 342 } 343 344 static int boundary_sub(int a, int adir, 345 int b, int bdir, 346 int *c, int *cdir) 347 { 348 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 349 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 350 *c = a - b; 351 *cdir = adir - bdir; 352 if (*cdir == -2) { 353 (*c)--; 354 } else if (*cdir == 2) { 355 (*c)++; 356 } 357 return 0; 358 } 359 360 static int boundary_lt(unsigned int a, int adir, 361 unsigned int b, int bdir) 362 { 363 if (adir < 0) { 364 a--; 365 adir = 1; 366 } else if (adir > 0) 367 adir = 1; 368 if (bdir < 0) { 369 b--; 370 bdir = 1; 371 } else if (bdir > 0) 372 bdir = 1; 373 return a < b || (a == b && adir < bdir); 374 } 375 376 /* Return 1 if min is nearer to best than max */ 377 static int boundary_nearer(int min, int mindir, 378 int best, int bestdir, 379 int max, int maxdir) 380 { 381 int dmin, dmindir; 382 int dmax, dmaxdir; 383 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 384 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 385 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 386 } 387 388 /** 389 * snd_pcm_hw_param_near 390 * @pcm: PCM instance 391 * @params: the hw_params instance 392 * @var: parameter to retrieve 393 * @best: value to set 394 * @dir: pointer to the direction (-1,0,1) or NULL 395 * 396 * Inside configuration space defined by PARAMS set PAR to the available value 397 * nearest to VAL. Reduce configuration space accordingly. 398 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 399 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 400 * Return the value found. 401 */ 402 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 403 struct snd_pcm_hw_params *params, 404 snd_pcm_hw_param_t var, unsigned int best, 405 int *dir) 406 { 407 struct snd_pcm_hw_params *save = NULL; 408 int v; 409 unsigned int saved_min; 410 int last = 0; 411 int min, max; 412 int mindir, maxdir; 413 int valdir = dir ? *dir : 0; 414 /* FIXME */ 415 if (best > INT_MAX) 416 best = INT_MAX; 417 min = max = best; 418 mindir = maxdir = valdir; 419 if (maxdir > 0) 420 maxdir = 0; 421 else if (maxdir == 0) 422 maxdir = -1; 423 else { 424 maxdir = 1; 425 max--; 426 } 427 save = kmalloc(sizeof(*save), GFP_KERNEL); 428 if (save == NULL) 429 return -ENOMEM; 430 *save = *params; 431 saved_min = min; 432 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 433 if (min >= 0) { 434 struct snd_pcm_hw_params *params1; 435 if (max < 0) 436 goto _end; 437 if ((unsigned int)min == saved_min && mindir == valdir) 438 goto _end; 439 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 440 if (params1 == NULL) { 441 kfree(save); 442 return -ENOMEM; 443 } 444 *params1 = *save; 445 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 446 if (max < 0) { 447 kfree(params1); 448 goto _end; 449 } 450 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 451 *params = *params1; 452 last = 1; 453 } 454 kfree(params1); 455 } else { 456 *params = *save; 457 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 458 if (max < 0) { 459 kfree(save); 460 return max; 461 } 462 last = 1; 463 } 464 _end: 465 kfree(save); 466 if (last) 467 v = snd_pcm_hw_param_last(pcm, params, var, dir); 468 else 469 v = snd_pcm_hw_param_first(pcm, params, var, dir); 470 snd_BUG_ON(v < 0); 471 return v; 472 } 473 474 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 475 snd_pcm_hw_param_t var, unsigned int val, 476 int dir) 477 { 478 int changed; 479 if (hw_is_mask(var)) { 480 struct snd_mask *m = hw_param_mask(params, var); 481 if (val == 0 && dir < 0) { 482 changed = -EINVAL; 483 snd_mask_none(m); 484 } else { 485 if (dir > 0) 486 val++; 487 else if (dir < 0) 488 val--; 489 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 490 } 491 } else if (hw_is_interval(var)) { 492 struct snd_interval *i = hw_param_interval(params, var); 493 if (val == 0 && dir < 0) { 494 changed = -EINVAL; 495 snd_interval_none(i); 496 } else if (dir == 0) 497 changed = snd_interval_refine_set(i, val); 498 else { 499 struct snd_interval t; 500 t.openmin = 1; 501 t.openmax = 1; 502 t.empty = 0; 503 t.integer = 0; 504 if (dir < 0) { 505 t.min = val - 1; 506 t.max = val; 507 } else { 508 t.min = val; 509 t.max = val+1; 510 } 511 changed = snd_interval_refine(i, &t); 512 } 513 } else 514 return -EINVAL; 515 if (changed) { 516 params->cmask |= 1 << var; 517 params->rmask |= 1 << var; 518 } 519 return changed; 520 } 521 522 /** 523 * snd_pcm_hw_param_set 524 * @pcm: PCM instance 525 * @params: the hw_params instance 526 * @var: parameter to retrieve 527 * @val: value to set 528 * @dir: pointer to the direction (-1,0,1) or NULL 529 * 530 * Inside configuration space defined by PARAMS remove from PAR all 531 * values != VAL. Reduce configuration space accordingly. 532 * Return VAL or -EINVAL if the configuration space is empty 533 */ 534 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 535 struct snd_pcm_hw_params *params, 536 snd_pcm_hw_param_t var, unsigned int val, 537 int dir) 538 { 539 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 540 if (changed < 0) 541 return changed; 542 if (params->rmask) { 543 int err = snd_pcm_hw_refine(pcm, params); 544 if (err < 0) 545 return err; 546 } 547 return snd_pcm_hw_param_value(params, var, NULL); 548 } 549 550 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 551 snd_pcm_hw_param_t var) 552 { 553 int changed; 554 changed = snd_interval_setinteger(hw_param_interval(params, var)); 555 if (changed) { 556 params->cmask |= 1 << var; 557 params->rmask |= 1 << var; 558 } 559 return changed; 560 } 561 562 /* 563 * plugin 564 */ 565 566 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 567 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 568 { 569 struct snd_pcm_runtime *runtime = substream->runtime; 570 struct snd_pcm_plugin *plugin, *next; 571 572 plugin = runtime->oss.plugin_first; 573 while (plugin) { 574 next = plugin->next; 575 snd_pcm_plugin_free(plugin); 576 plugin = next; 577 } 578 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 579 return 0; 580 } 581 582 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 583 { 584 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 585 plugin->next = runtime->oss.plugin_first; 586 plugin->prev = NULL; 587 if (runtime->oss.plugin_first) { 588 runtime->oss.plugin_first->prev = plugin; 589 runtime->oss.plugin_first = plugin; 590 } else { 591 runtime->oss.plugin_last = 592 runtime->oss.plugin_first = plugin; 593 } 594 return 0; 595 } 596 597 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 598 { 599 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 600 plugin->next = NULL; 601 plugin->prev = runtime->oss.plugin_last; 602 if (runtime->oss.plugin_last) { 603 runtime->oss.plugin_last->next = plugin; 604 runtime->oss.plugin_last = plugin; 605 } else { 606 runtime->oss.plugin_last = 607 runtime->oss.plugin_first = plugin; 608 } 609 return 0; 610 } 611 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 612 613 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 614 { 615 struct snd_pcm_runtime *runtime = substream->runtime; 616 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 617 long bytes = frames_to_bytes(runtime, frames); 618 if (buffer_size == runtime->oss.buffer_bytes) 619 return bytes; 620 #if BITS_PER_LONG >= 64 621 return runtime->oss.buffer_bytes * bytes / buffer_size; 622 #else 623 { 624 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 625 return div_u64(bsize, buffer_size); 626 } 627 #endif 628 } 629 630 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 631 { 632 struct snd_pcm_runtime *runtime = substream->runtime; 633 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 634 if (buffer_size == runtime->oss.buffer_bytes) 635 return bytes_to_frames(runtime, bytes); 636 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 637 } 638 639 static inline 640 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 641 { 642 return runtime->hw_ptr_interrupt; 643 } 644 645 /* define extended formats in the recent OSS versions (if any) */ 646 /* linear formats */ 647 #define AFMT_S32_LE 0x00001000 648 #define AFMT_S32_BE 0x00002000 649 #define AFMT_S24_LE 0x00008000 650 #define AFMT_S24_BE 0x00010000 651 #define AFMT_S24_PACKED 0x00040000 652 653 /* other supported formats */ 654 #define AFMT_FLOAT 0x00004000 655 #define AFMT_SPDIF_RAW 0x00020000 656 657 /* unsupported formats */ 658 #define AFMT_AC3 0x00000400 659 #define AFMT_VORBIS 0x00000800 660 661 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 662 { 663 switch (format) { 664 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 665 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 666 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 667 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 668 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 669 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 670 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 671 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 672 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 673 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 674 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 675 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 676 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 677 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 678 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 679 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 680 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 681 default: return SNDRV_PCM_FORMAT_U8; 682 } 683 } 684 685 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 686 { 687 switch (format) { 688 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 689 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 690 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 691 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 692 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 693 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 694 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 695 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 696 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 697 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 698 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 699 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 700 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 701 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 702 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 703 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 704 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 705 default: return -EINVAL; 706 } 707 } 708 709 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 710 struct snd_pcm_hw_params *oss_params, 711 struct snd_pcm_hw_params *slave_params) 712 { 713 size_t s; 714 size_t oss_buffer_size, oss_period_size, oss_periods; 715 size_t min_period_size, max_period_size; 716 struct snd_pcm_runtime *runtime = substream->runtime; 717 size_t oss_frame_size; 718 719 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 720 params_channels(oss_params) / 8; 721 722 oss_buffer_size = snd_pcm_plug_client_size(substream, 723 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 724 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 725 if (atomic_read(&substream->mmap_count)) { 726 if (oss_buffer_size > runtime->oss.mmap_bytes) 727 oss_buffer_size = runtime->oss.mmap_bytes; 728 } 729 730 if (substream->oss.setup.period_size > 16) 731 oss_period_size = substream->oss.setup.period_size; 732 else if (runtime->oss.fragshift) { 733 oss_period_size = 1 << runtime->oss.fragshift; 734 if (oss_period_size > oss_buffer_size / 2) 735 oss_period_size = oss_buffer_size / 2; 736 } else { 737 int sd; 738 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 739 740 oss_period_size = oss_buffer_size; 741 do { 742 oss_period_size /= 2; 743 } while (oss_period_size > bytes_per_sec); 744 if (runtime->oss.subdivision == 0) { 745 sd = 4; 746 if (oss_period_size / sd > 4096) 747 sd *= 2; 748 if (oss_period_size / sd < 4096) 749 sd = 1; 750 } else 751 sd = runtime->oss.subdivision; 752 oss_period_size /= sd; 753 if (oss_period_size < 16) 754 oss_period_size = 16; 755 } 756 757 min_period_size = snd_pcm_plug_client_size(substream, 758 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 759 min_period_size *= oss_frame_size; 760 min_period_size = roundup_pow_of_two(min_period_size); 761 if (oss_period_size < min_period_size) 762 oss_period_size = min_period_size; 763 764 max_period_size = snd_pcm_plug_client_size(substream, 765 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 766 max_period_size *= oss_frame_size; 767 max_period_size = rounddown_pow_of_two(max_period_size); 768 if (oss_period_size > max_period_size) 769 oss_period_size = max_period_size; 770 771 oss_periods = oss_buffer_size / oss_period_size; 772 773 if (substream->oss.setup.periods > 1) 774 oss_periods = substream->oss.setup.periods; 775 776 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 777 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 778 s = runtime->oss.maxfrags; 779 if (oss_periods > s) 780 oss_periods = s; 781 782 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 783 if (s < 2) 784 s = 2; 785 if (oss_periods < s) 786 oss_periods = s; 787 788 while (oss_period_size * oss_periods > oss_buffer_size) 789 oss_period_size /= 2; 790 791 if (oss_period_size < 16) 792 return -EINVAL; 793 runtime->oss.period_bytes = oss_period_size; 794 runtime->oss.period_frames = 1; 795 runtime->oss.periods = oss_periods; 796 return 0; 797 } 798 799 static int choose_rate(struct snd_pcm_substream *substream, 800 struct snd_pcm_hw_params *params, unsigned int best_rate) 801 { 802 struct snd_interval *it; 803 struct snd_pcm_hw_params *save; 804 unsigned int rate, prev; 805 806 save = kmalloc(sizeof(*save), GFP_KERNEL); 807 if (save == NULL) 808 return -ENOMEM; 809 *save = *params; 810 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 811 812 /* try multiples of the best rate */ 813 rate = best_rate; 814 for (;;) { 815 if (it->max < rate || (it->max == rate && it->openmax)) 816 break; 817 if (it->min < rate || (it->min == rate && !it->openmin)) { 818 int ret; 819 ret = snd_pcm_hw_param_set(substream, params, 820 SNDRV_PCM_HW_PARAM_RATE, 821 rate, 0); 822 if (ret == (int)rate) { 823 kfree(save); 824 return rate; 825 } 826 *params = *save; 827 } 828 prev = rate; 829 rate += best_rate; 830 if (rate <= prev) 831 break; 832 } 833 834 /* not found, use the nearest rate */ 835 kfree(save); 836 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 837 } 838 839 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 840 bool trylock) 841 { 842 struct snd_pcm_runtime *runtime = substream->runtime; 843 struct snd_pcm_hw_params *params, *sparams; 844 struct snd_pcm_sw_params *sw_params; 845 ssize_t oss_buffer_size, oss_period_size; 846 size_t oss_frame_size; 847 int err; 848 int direct; 849 snd_pcm_format_t format, sformat; 850 int n; 851 struct snd_mask sformat_mask; 852 struct snd_mask mask; 853 854 if (trylock) { 855 if (!(mutex_trylock(&runtime->oss.params_lock))) 856 return -EAGAIN; 857 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 858 return -EINTR; 859 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 860 params = kmalloc(sizeof(*params), GFP_KERNEL); 861 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 862 if (!sw_params || !params || !sparams) { 863 err = -ENOMEM; 864 goto failure; 865 } 866 867 if (atomic_read(&substream->mmap_count)) 868 direct = 1; 869 else 870 direct = substream->oss.setup.direct; 871 872 _snd_pcm_hw_params_any(sparams); 873 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 874 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 875 snd_mask_none(&mask); 876 if (atomic_read(&substream->mmap_count)) 877 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 878 else { 879 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 880 if (!direct) 881 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 882 } 883 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 884 if (err < 0) { 885 pcm_dbg(substream->pcm, "No usable accesses\n"); 886 err = -EINVAL; 887 goto failure; 888 } 889 choose_rate(substream, sparams, runtime->oss.rate); 890 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 891 892 format = snd_pcm_oss_format_from(runtime->oss.format); 893 894 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 895 if (direct) 896 sformat = format; 897 else 898 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 899 900 if ((__force int)sformat < 0 || 901 !snd_mask_test(&sformat_mask, (__force int)sformat)) { 902 for (sformat = (__force snd_pcm_format_t)0; 903 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 904 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 905 if (snd_mask_test(&sformat_mask, (__force int)sformat) && 906 snd_pcm_oss_format_to(sformat) >= 0) 907 break; 908 } 909 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 910 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 911 err = -EINVAL; 912 goto failure; 913 } 914 } 915 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 916 if (err < 0) 917 goto failure; 918 919 if (direct) { 920 memcpy(params, sparams, sizeof(*params)); 921 } else { 922 _snd_pcm_hw_params_any(params); 923 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 924 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 925 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 926 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 927 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 928 runtime->oss.channels, 0); 929 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 930 runtime->oss.rate, 0); 931 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 932 params_access(params), params_format(params), 933 params_channels(params), params_rate(params)); 934 } 935 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 936 params_access(sparams), params_format(sparams), 937 params_channels(sparams), params_rate(sparams)); 938 939 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 940 params_channels(params) / 8; 941 942 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 943 snd_pcm_oss_plugin_clear(substream); 944 if (!direct) { 945 /* add necessary plugins */ 946 snd_pcm_oss_plugin_clear(substream); 947 if ((err = snd_pcm_plug_format_plugins(substream, 948 params, 949 sparams)) < 0) { 950 pcm_dbg(substream->pcm, 951 "snd_pcm_plug_format_plugins failed: %i\n", err); 952 snd_pcm_oss_plugin_clear(substream); 953 goto failure; 954 } 955 if (runtime->oss.plugin_first) { 956 struct snd_pcm_plugin *plugin; 957 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 958 pcm_dbg(substream->pcm, 959 "snd_pcm_plugin_build_io failed: %i\n", err); 960 snd_pcm_oss_plugin_clear(substream); 961 goto failure; 962 } 963 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 964 err = snd_pcm_plugin_append(plugin); 965 } else { 966 err = snd_pcm_plugin_insert(plugin); 967 } 968 if (err < 0) { 969 snd_pcm_oss_plugin_clear(substream); 970 goto failure; 971 } 972 } 973 } 974 #endif 975 976 err = snd_pcm_oss_period_size(substream, params, sparams); 977 if (err < 0) 978 goto failure; 979 980 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 981 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 982 if (err < 0) 983 goto failure; 984 985 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 986 runtime->oss.periods, NULL); 987 if (err < 0) 988 goto failure; 989 990 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 991 992 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 993 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 994 goto failure; 995 } 996 997 if (runtime->oss.trigger) { 998 sw_params->start_threshold = 1; 999 } else { 1000 sw_params->start_threshold = runtime->boundary; 1001 } 1002 if (atomic_read(&substream->mmap_count) || 1003 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1004 sw_params->stop_threshold = runtime->boundary; 1005 else 1006 sw_params->stop_threshold = runtime->buffer_size; 1007 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1008 sw_params->period_step = 1; 1009 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1010 1 : runtime->period_size; 1011 if (atomic_read(&substream->mmap_count) || 1012 substream->oss.setup.nosilence) { 1013 sw_params->silence_threshold = 0; 1014 sw_params->silence_size = 0; 1015 } else { 1016 snd_pcm_uframes_t frames; 1017 frames = runtime->period_size + 16; 1018 if (frames > runtime->buffer_size) 1019 frames = runtime->buffer_size; 1020 sw_params->silence_threshold = frames; 1021 sw_params->silence_size = frames; 1022 } 1023 1024 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1025 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1026 goto failure; 1027 } 1028 1029 runtime->oss.periods = params_periods(sparams); 1030 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1031 if (oss_period_size < 0) { 1032 err = -EINVAL; 1033 goto failure; 1034 } 1035 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1036 if (runtime->oss.plugin_first) { 1037 err = snd_pcm_plug_alloc(substream, oss_period_size); 1038 if (err < 0) 1039 goto failure; 1040 } 1041 #endif 1042 oss_period_size *= oss_frame_size; 1043 1044 oss_buffer_size = oss_period_size * runtime->oss.periods; 1045 if (oss_buffer_size < 0) { 1046 err = -EINVAL; 1047 goto failure; 1048 } 1049 1050 runtime->oss.period_bytes = oss_period_size; 1051 runtime->oss.buffer_bytes = oss_buffer_size; 1052 1053 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1054 runtime->oss.period_bytes, 1055 runtime->oss.buffer_bytes); 1056 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1057 params_period_size(sparams), 1058 params_buffer_size(sparams)); 1059 1060 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1061 runtime->oss.channels = params_channels(params); 1062 runtime->oss.rate = params_rate(params); 1063 1064 vfree(runtime->oss.buffer); 1065 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1066 if (!runtime->oss.buffer) { 1067 err = -ENOMEM; 1068 goto failure; 1069 } 1070 1071 runtime->oss.params = 0; 1072 runtime->oss.prepare = 1; 1073 runtime->oss.buffer_used = 0; 1074 if (runtime->dma_area) 1075 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1076 1077 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1078 1079 err = 0; 1080 failure: 1081 kfree(sw_params); 1082 kfree(params); 1083 kfree(sparams); 1084 mutex_unlock(&runtime->oss.params_lock); 1085 return err; 1086 } 1087 1088 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1089 { 1090 int idx, err; 1091 struct snd_pcm_substream *asubstream = NULL, *substream; 1092 1093 for (idx = 0; idx < 2; idx++) { 1094 substream = pcm_oss_file->streams[idx]; 1095 if (substream == NULL) 1096 continue; 1097 if (asubstream == NULL) 1098 asubstream = substream; 1099 if (substream->runtime->oss.params) { 1100 err = snd_pcm_oss_change_params(substream, false); 1101 if (err < 0) 1102 return err; 1103 } 1104 } 1105 if (!asubstream) 1106 return -EIO; 1107 if (r_substream) 1108 *r_substream = asubstream; 1109 return 0; 1110 } 1111 1112 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1113 { 1114 int err; 1115 struct snd_pcm_runtime *runtime = substream->runtime; 1116 1117 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1118 if (err < 0) { 1119 pcm_dbg(substream->pcm, 1120 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1121 return err; 1122 } 1123 runtime->oss.prepare = 0; 1124 runtime->oss.prev_hw_ptr_period = 0; 1125 runtime->oss.period_ptr = 0; 1126 runtime->oss.buffer_used = 0; 1127 1128 return 0; 1129 } 1130 1131 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1132 { 1133 struct snd_pcm_runtime *runtime; 1134 int err; 1135 1136 if (substream == NULL) 1137 return 0; 1138 runtime = substream->runtime; 1139 if (runtime->oss.params) { 1140 err = snd_pcm_oss_change_params(substream, false); 1141 if (err < 0) 1142 return err; 1143 } 1144 if (runtime->oss.prepare) { 1145 err = snd_pcm_oss_prepare(substream); 1146 if (err < 0) 1147 return err; 1148 } 1149 return 0; 1150 } 1151 1152 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1153 { 1154 struct snd_pcm_runtime *runtime; 1155 snd_pcm_uframes_t frames; 1156 int err = 0; 1157 1158 while (1) { 1159 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1160 if (err < 0) 1161 break; 1162 runtime = substream->runtime; 1163 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1164 break; 1165 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1166 /* until avail(delay) <= buffer_size */ 1167 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1168 frames /= runtime->period_size; 1169 frames *= runtime->period_size; 1170 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1171 if (err < 0) 1172 break; 1173 } 1174 return err; 1175 } 1176 1177 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1178 { 1179 struct snd_pcm_runtime *runtime = substream->runtime; 1180 int ret; 1181 while (1) { 1182 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1183 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1184 #ifdef OSS_DEBUG 1185 pcm_dbg(substream->pcm, 1186 "pcm_oss: write: recovering from %s\n", 1187 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1188 "XRUN" : "SUSPEND"); 1189 #endif 1190 ret = snd_pcm_oss_prepare(substream); 1191 if (ret < 0) 1192 break; 1193 } 1194 if (in_kernel) { 1195 mm_segment_t fs; 1196 fs = snd_enter_user(); 1197 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1198 snd_leave_user(fs); 1199 } else { 1200 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); 1201 } 1202 if (ret != -EPIPE && ret != -ESTRPIPE) 1203 break; 1204 /* test, if we can't store new data, because the stream */ 1205 /* has not been started */ 1206 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1207 return -EAGAIN; 1208 } 1209 return ret; 1210 } 1211 1212 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1213 { 1214 struct snd_pcm_runtime *runtime = substream->runtime; 1215 snd_pcm_sframes_t delay; 1216 int ret; 1217 while (1) { 1218 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1219 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1220 #ifdef OSS_DEBUG 1221 pcm_dbg(substream->pcm, 1222 "pcm_oss: read: recovering from %s\n", 1223 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1224 "XRUN" : "SUSPEND"); 1225 #endif 1226 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1227 if (ret < 0) 1228 break; 1229 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1230 ret = snd_pcm_oss_prepare(substream); 1231 if (ret < 0) 1232 break; 1233 } 1234 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1235 if (ret < 0) 1236 break; 1237 if (in_kernel) { 1238 mm_segment_t fs; 1239 fs = snd_enter_user(); 1240 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1241 snd_leave_user(fs); 1242 } else { 1243 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); 1244 } 1245 if (ret == -EPIPE) { 1246 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1247 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1248 if (ret < 0) 1249 break; 1250 } 1251 continue; 1252 } 1253 if (ret != -ESTRPIPE) 1254 break; 1255 } 1256 return ret; 1257 } 1258 1259 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1260 { 1261 struct snd_pcm_runtime *runtime = substream->runtime; 1262 int ret; 1263 while (1) { 1264 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1265 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1266 #ifdef OSS_DEBUG 1267 pcm_dbg(substream->pcm, 1268 "pcm_oss: writev: recovering from %s\n", 1269 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1270 "XRUN" : "SUSPEND"); 1271 #endif 1272 ret = snd_pcm_oss_prepare(substream); 1273 if (ret < 0) 1274 break; 1275 } 1276 if (in_kernel) { 1277 mm_segment_t fs; 1278 fs = snd_enter_user(); 1279 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1280 snd_leave_user(fs); 1281 } else { 1282 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1283 } 1284 if (ret != -EPIPE && ret != -ESTRPIPE) 1285 break; 1286 1287 /* test, if we can't store new data, because the stream */ 1288 /* has not been started */ 1289 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1290 return -EAGAIN; 1291 } 1292 return ret; 1293 } 1294 1295 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1296 { 1297 struct snd_pcm_runtime *runtime = substream->runtime; 1298 int ret; 1299 while (1) { 1300 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1301 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1302 #ifdef OSS_DEBUG 1303 pcm_dbg(substream->pcm, 1304 "pcm_oss: readv: recovering from %s\n", 1305 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1306 "XRUN" : "SUSPEND"); 1307 #endif 1308 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1309 if (ret < 0) 1310 break; 1311 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1312 ret = snd_pcm_oss_prepare(substream); 1313 if (ret < 0) 1314 break; 1315 } 1316 if (in_kernel) { 1317 mm_segment_t fs; 1318 fs = snd_enter_user(); 1319 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1320 snd_leave_user(fs); 1321 } else { 1322 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1323 } 1324 if (ret != -EPIPE && ret != -ESTRPIPE) 1325 break; 1326 } 1327 return ret; 1328 } 1329 1330 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1331 { 1332 struct snd_pcm_runtime *runtime = substream->runtime; 1333 snd_pcm_sframes_t frames, frames1; 1334 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1335 if (runtime->oss.plugin_first) { 1336 struct snd_pcm_plugin_channel *channels; 1337 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1338 if (!in_kernel) { 1339 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1340 return -EFAULT; 1341 buf = runtime->oss.buffer; 1342 } 1343 frames = bytes / oss_frame_bytes; 1344 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1345 if (frames1 < 0) 1346 return frames1; 1347 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1348 if (frames1 <= 0) 1349 return frames1; 1350 bytes = frames1 * oss_frame_bytes; 1351 } else 1352 #endif 1353 { 1354 frames = bytes_to_frames(runtime, bytes); 1355 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1356 if (frames1 <= 0) 1357 return frames1; 1358 bytes = frames_to_bytes(runtime, frames1); 1359 } 1360 return bytes; 1361 } 1362 1363 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1364 { 1365 size_t xfer = 0; 1366 ssize_t tmp; 1367 struct snd_pcm_runtime *runtime = substream->runtime; 1368 1369 if (atomic_read(&substream->mmap_count)) 1370 return -ENXIO; 1371 1372 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1373 return tmp; 1374 mutex_lock(&runtime->oss.params_lock); 1375 while (bytes > 0) { 1376 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1377 tmp = bytes; 1378 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1379 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1380 if (tmp > 0) { 1381 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1382 tmp = -EFAULT; 1383 goto err; 1384 } 1385 } 1386 runtime->oss.buffer_used += tmp; 1387 buf += tmp; 1388 bytes -= tmp; 1389 xfer += tmp; 1390 if (substream->oss.setup.partialfrag || 1391 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1392 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1393 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1394 if (tmp <= 0) 1395 goto err; 1396 runtime->oss.bytes += tmp; 1397 runtime->oss.period_ptr += tmp; 1398 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1399 if (runtime->oss.period_ptr == 0 || 1400 runtime->oss.period_ptr == runtime->oss.buffer_used) 1401 runtime->oss.buffer_used = 0; 1402 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1403 tmp = -EAGAIN; 1404 goto err; 1405 } 1406 } 1407 } else { 1408 tmp = snd_pcm_oss_write2(substream, 1409 (const char __force *)buf, 1410 runtime->oss.period_bytes, 0); 1411 if (tmp <= 0) 1412 goto err; 1413 runtime->oss.bytes += tmp; 1414 buf += tmp; 1415 bytes -= tmp; 1416 xfer += tmp; 1417 if ((substream->f_flags & O_NONBLOCK) != 0 && 1418 tmp != runtime->oss.period_bytes) 1419 break; 1420 } 1421 } 1422 mutex_unlock(&runtime->oss.params_lock); 1423 return xfer; 1424 1425 err: 1426 mutex_unlock(&runtime->oss.params_lock); 1427 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1428 } 1429 1430 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1431 { 1432 struct snd_pcm_runtime *runtime = substream->runtime; 1433 snd_pcm_sframes_t frames, frames1; 1434 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1435 char __user *final_dst = (char __force __user *)buf; 1436 if (runtime->oss.plugin_first) { 1437 struct snd_pcm_plugin_channel *channels; 1438 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1439 if (!in_kernel) 1440 buf = runtime->oss.buffer; 1441 frames = bytes / oss_frame_bytes; 1442 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1443 if (frames1 < 0) 1444 return frames1; 1445 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1446 if (frames1 <= 0) 1447 return frames1; 1448 bytes = frames1 * oss_frame_bytes; 1449 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1450 return -EFAULT; 1451 } else 1452 #endif 1453 { 1454 frames = bytes_to_frames(runtime, bytes); 1455 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1456 if (frames1 <= 0) 1457 return frames1; 1458 bytes = frames_to_bytes(runtime, frames1); 1459 } 1460 return bytes; 1461 } 1462 1463 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1464 { 1465 size_t xfer = 0; 1466 ssize_t tmp; 1467 struct snd_pcm_runtime *runtime = substream->runtime; 1468 1469 if (atomic_read(&substream->mmap_count)) 1470 return -ENXIO; 1471 1472 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1473 return tmp; 1474 mutex_lock(&runtime->oss.params_lock); 1475 while (bytes > 0) { 1476 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1477 if (runtime->oss.buffer_used == 0) { 1478 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1479 if (tmp <= 0) 1480 goto err; 1481 runtime->oss.bytes += tmp; 1482 runtime->oss.period_ptr = tmp; 1483 runtime->oss.buffer_used = tmp; 1484 } 1485 tmp = bytes; 1486 if ((size_t) tmp > runtime->oss.buffer_used) 1487 tmp = runtime->oss.buffer_used; 1488 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1489 tmp = -EFAULT; 1490 goto err; 1491 } 1492 buf += tmp; 1493 bytes -= tmp; 1494 xfer += tmp; 1495 runtime->oss.buffer_used -= tmp; 1496 } else { 1497 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1498 runtime->oss.period_bytes, 0); 1499 if (tmp <= 0) 1500 goto err; 1501 runtime->oss.bytes += tmp; 1502 buf += tmp; 1503 bytes -= tmp; 1504 xfer += tmp; 1505 } 1506 } 1507 mutex_unlock(&runtime->oss.params_lock); 1508 return xfer; 1509 1510 err: 1511 mutex_unlock(&runtime->oss.params_lock); 1512 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1513 } 1514 1515 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1516 { 1517 struct snd_pcm_substream *substream; 1518 struct snd_pcm_runtime *runtime; 1519 int i; 1520 1521 for (i = 0; i < 2; i++) { 1522 substream = pcm_oss_file->streams[i]; 1523 if (!substream) 1524 continue; 1525 runtime = substream->runtime; 1526 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1527 runtime->oss.prepare = 1; 1528 runtime->oss.buffer_used = 0; 1529 runtime->oss.prev_hw_ptr_period = 0; 1530 runtime->oss.period_ptr = 0; 1531 } 1532 return 0; 1533 } 1534 1535 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1536 { 1537 struct snd_pcm_substream *substream; 1538 int err; 1539 1540 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1541 if (substream != NULL) { 1542 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1543 return err; 1544 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1545 } 1546 /* note: all errors from the start action are ignored */ 1547 /* OSS apps do not know, how to handle them */ 1548 return 0; 1549 } 1550 1551 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1552 { 1553 struct snd_pcm_runtime *runtime; 1554 ssize_t result = 0; 1555 snd_pcm_state_t state; 1556 long res; 1557 wait_queue_t wait; 1558 1559 runtime = substream->runtime; 1560 init_waitqueue_entry(&wait, current); 1561 add_wait_queue(&runtime->sleep, &wait); 1562 #ifdef OSS_DEBUG 1563 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1564 #endif 1565 while (1) { 1566 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1567 if (result > 0) { 1568 runtime->oss.buffer_used = 0; 1569 result = 0; 1570 break; 1571 } 1572 if (result != 0 && result != -EAGAIN) 1573 break; 1574 result = 0; 1575 set_current_state(TASK_INTERRUPTIBLE); 1576 snd_pcm_stream_lock_irq(substream); 1577 state = runtime->status->state; 1578 snd_pcm_stream_unlock_irq(substream); 1579 if (state != SNDRV_PCM_STATE_RUNNING) { 1580 set_current_state(TASK_RUNNING); 1581 break; 1582 } 1583 res = schedule_timeout(10 * HZ); 1584 if (signal_pending(current)) { 1585 result = -ERESTARTSYS; 1586 break; 1587 } 1588 if (res == 0) { 1589 pcm_err(substream->pcm, 1590 "OSS sync error - DMA timeout\n"); 1591 result = -EIO; 1592 break; 1593 } 1594 } 1595 remove_wait_queue(&runtime->sleep, &wait); 1596 return result; 1597 } 1598 1599 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1600 { 1601 int err = 0; 1602 unsigned int saved_f_flags; 1603 struct snd_pcm_substream *substream; 1604 struct snd_pcm_runtime *runtime; 1605 snd_pcm_format_t format; 1606 unsigned long width; 1607 size_t size; 1608 1609 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1610 if (substream != NULL) { 1611 runtime = substream->runtime; 1612 if (atomic_read(&substream->mmap_count)) 1613 goto __direct; 1614 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1615 return err; 1616 format = snd_pcm_oss_format_from(runtime->oss.format); 1617 width = snd_pcm_format_physical_width(format); 1618 mutex_lock(&runtime->oss.params_lock); 1619 if (runtime->oss.buffer_used > 0) { 1620 #ifdef OSS_DEBUG 1621 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1622 #endif 1623 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1624 snd_pcm_format_set_silence(format, 1625 runtime->oss.buffer + runtime->oss.buffer_used, 1626 size); 1627 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1628 if (err < 0) { 1629 mutex_unlock(&runtime->oss.params_lock); 1630 return err; 1631 } 1632 } else if (runtime->oss.period_ptr > 0) { 1633 #ifdef OSS_DEBUG 1634 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1635 #endif 1636 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1637 snd_pcm_format_set_silence(format, 1638 runtime->oss.buffer, 1639 size * 8 / width); 1640 err = snd_pcm_oss_sync1(substream, size); 1641 if (err < 0) { 1642 mutex_unlock(&runtime->oss.params_lock); 1643 return err; 1644 } 1645 } 1646 /* 1647 * The ALSA's period might be a bit large than OSS one. 1648 * Fill the remain portion of ALSA period with zeros. 1649 */ 1650 size = runtime->control->appl_ptr % runtime->period_size; 1651 if (size > 0) { 1652 size = runtime->period_size - size; 1653 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1654 size = (runtime->frame_bits * size) / 8; 1655 while (size > 0) { 1656 mm_segment_t fs; 1657 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1658 size -= size1; 1659 size1 *= 8; 1660 size1 /= runtime->sample_bits; 1661 snd_pcm_format_set_silence(runtime->format, 1662 runtime->oss.buffer, 1663 size1); 1664 size1 /= runtime->channels; /* frames */ 1665 fs = snd_enter_user(); 1666 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1); 1667 snd_leave_user(fs); 1668 } 1669 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1670 void __user *buffers[runtime->channels]; 1671 memset(buffers, 0, runtime->channels * sizeof(void *)); 1672 snd_pcm_lib_writev(substream, buffers, size); 1673 } 1674 } 1675 mutex_unlock(&runtime->oss.params_lock); 1676 /* 1677 * finish sync: drain the buffer 1678 */ 1679 __direct: 1680 saved_f_flags = substream->f_flags; 1681 substream->f_flags &= ~O_NONBLOCK; 1682 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1683 substream->f_flags = saved_f_flags; 1684 if (err < 0) 1685 return err; 1686 runtime->oss.prepare = 1; 1687 } 1688 1689 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1690 if (substream != NULL) { 1691 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1692 return err; 1693 runtime = substream->runtime; 1694 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1695 if (err < 0) 1696 return err; 1697 runtime->oss.buffer_used = 0; 1698 runtime->oss.prepare = 1; 1699 } 1700 return 0; 1701 } 1702 1703 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1704 { 1705 int idx; 1706 1707 for (idx = 1; idx >= 0; --idx) { 1708 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1709 struct snd_pcm_runtime *runtime; 1710 if (substream == NULL) 1711 continue; 1712 runtime = substream->runtime; 1713 if (rate < 1000) 1714 rate = 1000; 1715 else if (rate > 192000) 1716 rate = 192000; 1717 if (runtime->oss.rate != rate) { 1718 runtime->oss.params = 1; 1719 runtime->oss.rate = rate; 1720 } 1721 } 1722 return snd_pcm_oss_get_rate(pcm_oss_file); 1723 } 1724 1725 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1726 { 1727 struct snd_pcm_substream *substream; 1728 int err; 1729 1730 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1731 return err; 1732 return substream->runtime->oss.rate; 1733 } 1734 1735 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1736 { 1737 int idx; 1738 if (channels < 1) 1739 channels = 1; 1740 if (channels > 128) 1741 return -EINVAL; 1742 for (idx = 1; idx >= 0; --idx) { 1743 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1744 struct snd_pcm_runtime *runtime; 1745 if (substream == NULL) 1746 continue; 1747 runtime = substream->runtime; 1748 if (runtime->oss.channels != channels) { 1749 runtime->oss.params = 1; 1750 runtime->oss.channels = channels; 1751 } 1752 } 1753 return snd_pcm_oss_get_channels(pcm_oss_file); 1754 } 1755 1756 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1757 { 1758 struct snd_pcm_substream *substream; 1759 int err; 1760 1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1762 return err; 1763 return substream->runtime->oss.channels; 1764 } 1765 1766 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1767 { 1768 struct snd_pcm_substream *substream; 1769 int err; 1770 1771 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1772 return err; 1773 return substream->runtime->oss.period_bytes; 1774 } 1775 1776 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1777 { 1778 struct snd_pcm_substream *substream; 1779 int err; 1780 int direct; 1781 struct snd_pcm_hw_params *params; 1782 unsigned int formats = 0; 1783 struct snd_mask format_mask; 1784 int fmt; 1785 1786 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1787 return err; 1788 if (atomic_read(&substream->mmap_count)) 1789 direct = 1; 1790 else 1791 direct = substream->oss.setup.direct; 1792 if (!direct) 1793 return AFMT_MU_LAW | AFMT_U8 | 1794 AFMT_S16_LE | AFMT_S16_BE | 1795 AFMT_S8 | AFMT_U16_LE | 1796 AFMT_U16_BE | 1797 AFMT_S32_LE | AFMT_S32_BE | 1798 AFMT_S24_LE | AFMT_S24_BE | 1799 AFMT_S24_PACKED; 1800 params = kmalloc(sizeof(*params), GFP_KERNEL); 1801 if (!params) 1802 return -ENOMEM; 1803 _snd_pcm_hw_params_any(params); 1804 err = snd_pcm_hw_refine(substream, params); 1805 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1806 kfree(params); 1807 if (err < 0) 1808 return err; 1809 for (fmt = 0; fmt < 32; ++fmt) { 1810 if (snd_mask_test(&format_mask, fmt)) { 1811 int f = snd_pcm_oss_format_to(fmt); 1812 if (f >= 0) 1813 formats |= f; 1814 } 1815 } 1816 return formats; 1817 } 1818 1819 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1820 { 1821 int formats, idx; 1822 1823 if (format != AFMT_QUERY) { 1824 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1825 if (formats < 0) 1826 return formats; 1827 if (!(formats & format)) 1828 format = AFMT_U8; 1829 for (idx = 1; idx >= 0; --idx) { 1830 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1831 struct snd_pcm_runtime *runtime; 1832 if (substream == NULL) 1833 continue; 1834 runtime = substream->runtime; 1835 if (runtime->oss.format != format) { 1836 runtime->oss.params = 1; 1837 runtime->oss.format = format; 1838 } 1839 } 1840 } 1841 return snd_pcm_oss_get_format(pcm_oss_file); 1842 } 1843 1844 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1845 { 1846 struct snd_pcm_substream *substream; 1847 int err; 1848 1849 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1850 return err; 1851 return substream->runtime->oss.format; 1852 } 1853 1854 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1855 { 1856 struct snd_pcm_runtime *runtime; 1857 1858 if (substream == NULL) 1859 return 0; 1860 runtime = substream->runtime; 1861 if (subdivide == 0) { 1862 subdivide = runtime->oss.subdivision; 1863 if (subdivide == 0) 1864 subdivide = 1; 1865 return subdivide; 1866 } 1867 if (runtime->oss.subdivision || runtime->oss.fragshift) 1868 return -EINVAL; 1869 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1870 subdivide != 8 && subdivide != 16) 1871 return -EINVAL; 1872 runtime->oss.subdivision = subdivide; 1873 runtime->oss.params = 1; 1874 return subdivide; 1875 } 1876 1877 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1878 { 1879 int err = -EINVAL, idx; 1880 1881 for (idx = 1; idx >= 0; --idx) { 1882 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1883 if (substream == NULL) 1884 continue; 1885 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1886 return err; 1887 } 1888 return err; 1889 } 1890 1891 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1892 { 1893 struct snd_pcm_runtime *runtime; 1894 1895 if (substream == NULL) 1896 return 0; 1897 runtime = substream->runtime; 1898 if (runtime->oss.subdivision || runtime->oss.fragshift) 1899 return -EINVAL; 1900 runtime->oss.fragshift = val & 0xffff; 1901 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1902 if (runtime->oss.fragshift < 4) /* < 16 */ 1903 runtime->oss.fragshift = 4; 1904 if (runtime->oss.maxfrags < 2) 1905 runtime->oss.maxfrags = 2; 1906 runtime->oss.params = 1; 1907 return 0; 1908 } 1909 1910 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1911 { 1912 int err = -EINVAL, idx; 1913 1914 for (idx = 1; idx >= 0; --idx) { 1915 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1916 if (substream == NULL) 1917 continue; 1918 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1919 return err; 1920 } 1921 return err; 1922 } 1923 1924 static int snd_pcm_oss_nonblock(struct file * file) 1925 { 1926 spin_lock(&file->f_lock); 1927 file->f_flags |= O_NONBLOCK; 1928 spin_unlock(&file->f_lock); 1929 return 0; 1930 } 1931 1932 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1933 { 1934 1935 if (substream == NULL) { 1936 res &= ~DSP_CAP_DUPLEX; 1937 return res; 1938 } 1939 #ifdef DSP_CAP_MULTI 1940 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1941 if (substream->pstr->substream_count > 1) 1942 res |= DSP_CAP_MULTI; 1943 #endif 1944 /* DSP_CAP_REALTIME is set all times: */ 1945 /* all ALSA drivers can return actual pointer in ring buffer */ 1946 #if defined(DSP_CAP_REALTIME) && 0 1947 { 1948 struct snd_pcm_runtime *runtime = substream->runtime; 1949 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1950 res &= ~DSP_CAP_REALTIME; 1951 } 1952 #endif 1953 return res; 1954 } 1955 1956 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1957 { 1958 int result, idx; 1959 1960 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1961 for (idx = 0; idx < 2; idx++) { 1962 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1963 result = snd_pcm_oss_get_caps1(substream, result); 1964 } 1965 result |= 0x0001; /* revision - same as SB AWE 64 */ 1966 return result; 1967 } 1968 1969 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 1970 snd_pcm_uframes_t hw_ptr) 1971 { 1972 struct snd_pcm_runtime *runtime = substream->runtime; 1973 snd_pcm_uframes_t appl_ptr; 1974 appl_ptr = hw_ptr + runtime->buffer_size; 1975 appl_ptr %= runtime->boundary; 1976 runtime->control->appl_ptr = appl_ptr; 1977 } 1978 1979 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1980 { 1981 struct snd_pcm_runtime *runtime; 1982 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1983 int err, cmd; 1984 1985 #ifdef OSS_DEBUG 1986 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 1987 #endif 1988 1989 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1990 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1991 1992 if (psubstream) { 1993 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1994 return err; 1995 } 1996 if (csubstream) { 1997 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1998 return err; 1999 } 2000 if (psubstream) { 2001 runtime = psubstream->runtime; 2002 if (trigger & PCM_ENABLE_OUTPUT) { 2003 if (runtime->oss.trigger) 2004 goto _skip1; 2005 if (atomic_read(&psubstream->mmap_count)) 2006 snd_pcm_oss_simulate_fill(psubstream, 2007 get_hw_ptr_period(runtime)); 2008 runtime->oss.trigger = 1; 2009 runtime->start_threshold = 1; 2010 cmd = SNDRV_PCM_IOCTL_START; 2011 } else { 2012 if (!runtime->oss.trigger) 2013 goto _skip1; 2014 runtime->oss.trigger = 0; 2015 runtime->start_threshold = runtime->boundary; 2016 cmd = SNDRV_PCM_IOCTL_DROP; 2017 runtime->oss.prepare = 1; 2018 } 2019 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2020 if (err < 0) 2021 return err; 2022 } 2023 _skip1: 2024 if (csubstream) { 2025 runtime = csubstream->runtime; 2026 if (trigger & PCM_ENABLE_INPUT) { 2027 if (runtime->oss.trigger) 2028 goto _skip2; 2029 runtime->oss.trigger = 1; 2030 runtime->start_threshold = 1; 2031 cmd = SNDRV_PCM_IOCTL_START; 2032 } else { 2033 if (!runtime->oss.trigger) 2034 goto _skip2; 2035 runtime->oss.trigger = 0; 2036 runtime->start_threshold = runtime->boundary; 2037 cmd = SNDRV_PCM_IOCTL_DROP; 2038 runtime->oss.prepare = 1; 2039 } 2040 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2041 if (err < 0) 2042 return err; 2043 } 2044 _skip2: 2045 return 0; 2046 } 2047 2048 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2049 { 2050 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2051 int result = 0; 2052 2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2055 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2056 result |= PCM_ENABLE_OUTPUT; 2057 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2058 result |= PCM_ENABLE_INPUT; 2059 return result; 2060 } 2061 2062 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2063 { 2064 struct snd_pcm_substream *substream; 2065 struct snd_pcm_runtime *runtime; 2066 snd_pcm_sframes_t delay; 2067 int err; 2068 2069 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2070 if (substream == NULL) 2071 return -EINVAL; 2072 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2073 return err; 2074 runtime = substream->runtime; 2075 if (runtime->oss.params || runtime->oss.prepare) 2076 return 0; 2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2078 if (err == -EPIPE) 2079 delay = 0; /* hack for broken OSS applications */ 2080 else if (err < 0) 2081 return err; 2082 return snd_pcm_oss_bytes(substream, delay); 2083 } 2084 2085 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2086 { 2087 struct snd_pcm_substream *substream; 2088 struct snd_pcm_runtime *runtime; 2089 snd_pcm_sframes_t delay; 2090 int fixup; 2091 struct count_info info; 2092 int err; 2093 2094 if (_info == NULL) 2095 return -EFAULT; 2096 substream = pcm_oss_file->streams[stream]; 2097 if (substream == NULL) 2098 return -EINVAL; 2099 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2100 return err; 2101 runtime = substream->runtime; 2102 if (runtime->oss.params || runtime->oss.prepare) { 2103 memset(&info, 0, sizeof(info)); 2104 if (copy_to_user(_info, &info, sizeof(info))) 2105 return -EFAULT; 2106 return 0; 2107 } 2108 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2110 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2111 err = 0; 2112 delay = 0; 2113 fixup = 0; 2114 } else { 2115 fixup = runtime->oss.buffer_used; 2116 } 2117 } else { 2118 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2119 fixup = -runtime->oss.buffer_used; 2120 } 2121 if (err < 0) 2122 return err; 2123 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2124 if (atomic_read(&substream->mmap_count)) { 2125 snd_pcm_sframes_t n; 2126 delay = get_hw_ptr_period(runtime); 2127 n = delay - runtime->oss.prev_hw_ptr_period; 2128 if (n < 0) 2129 n += runtime->boundary; 2130 info.blocks = n / runtime->period_size; 2131 runtime->oss.prev_hw_ptr_period = delay; 2132 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2133 snd_pcm_oss_simulate_fill(substream, delay); 2134 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2135 } else { 2136 delay = snd_pcm_oss_bytes(substream, delay); 2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2138 if (substream->oss.setup.buggyptr) 2139 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2140 else 2141 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2142 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2143 } else { 2144 delay += fixup; 2145 info.blocks = delay / runtime->oss.period_bytes; 2146 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2147 } 2148 } 2149 if (copy_to_user(_info, &info, sizeof(info))) 2150 return -EFAULT; 2151 return 0; 2152 } 2153 2154 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2155 { 2156 struct snd_pcm_substream *substream; 2157 struct snd_pcm_runtime *runtime; 2158 snd_pcm_sframes_t avail; 2159 int fixup; 2160 struct audio_buf_info info; 2161 int err; 2162 2163 if (_info == NULL) 2164 return -EFAULT; 2165 substream = pcm_oss_file->streams[stream]; 2166 if (substream == NULL) 2167 return -EINVAL; 2168 runtime = substream->runtime; 2169 2170 if (runtime->oss.params && 2171 (err = snd_pcm_oss_change_params(substream, false)) < 0) 2172 return err; 2173 2174 info.fragsize = runtime->oss.period_bytes; 2175 info.fragstotal = runtime->periods; 2176 if (runtime->oss.prepare) { 2177 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2178 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2179 info.fragments = runtime->oss.periods; 2180 } else { 2181 info.bytes = 0; 2182 info.fragments = 0; 2183 } 2184 } else { 2185 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2187 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2188 avail = runtime->buffer_size; 2189 err = 0; 2190 fixup = 0; 2191 } else { 2192 avail = runtime->buffer_size - avail; 2193 fixup = -runtime->oss.buffer_used; 2194 } 2195 } else { 2196 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2197 fixup = runtime->oss.buffer_used; 2198 } 2199 if (err < 0) 2200 return err; 2201 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2202 info.fragments = info.bytes / runtime->oss.period_bytes; 2203 } 2204 2205 #ifdef OSS_DEBUG 2206 pcm_dbg(substream->pcm, 2207 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2208 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2209 #endif 2210 if (copy_to_user(_info, &info, sizeof(info))) 2211 return -EFAULT; 2212 return 0; 2213 } 2214 2215 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2216 { 2217 // it won't be probably implemented 2218 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2219 return -EINVAL; 2220 } 2221 2222 static const char *strip_task_path(const char *path) 2223 { 2224 const char *ptr, *ptrl = NULL; 2225 for (ptr = path; *ptr; ptr++) { 2226 if (*ptr == '/') 2227 ptrl = ptr + 1; 2228 } 2229 return ptrl; 2230 } 2231 2232 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2233 const char *task_name, 2234 struct snd_pcm_oss_setup *rsetup) 2235 { 2236 struct snd_pcm_oss_setup *setup; 2237 2238 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2239 do { 2240 for (setup = pcm->streams[stream].oss.setup_list; setup; 2241 setup = setup->next) { 2242 if (!strcmp(setup->task_name, task_name)) 2243 goto out; 2244 } 2245 } while ((task_name = strip_task_path(task_name)) != NULL); 2246 out: 2247 if (setup) 2248 *rsetup = *setup; 2249 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2250 } 2251 2252 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2253 { 2254 struct snd_pcm_runtime *runtime; 2255 runtime = substream->runtime; 2256 vfree(runtime->oss.buffer); 2257 runtime->oss.buffer = NULL; 2258 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2259 snd_pcm_oss_plugin_clear(substream); 2260 #endif 2261 substream->oss.oss = 0; 2262 } 2263 2264 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2265 struct snd_pcm_oss_setup *setup, 2266 int minor) 2267 { 2268 struct snd_pcm_runtime *runtime; 2269 2270 substream->oss.oss = 1; 2271 substream->oss.setup = *setup; 2272 if (setup->nonblock) 2273 substream->f_flags |= O_NONBLOCK; 2274 else if (setup->block) 2275 substream->f_flags &= ~O_NONBLOCK; 2276 runtime = substream->runtime; 2277 runtime->oss.params = 1; 2278 runtime->oss.trigger = 1; 2279 runtime->oss.rate = 8000; 2280 mutex_init(&runtime->oss.params_lock); 2281 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2282 case SNDRV_MINOR_OSS_PCM_8: 2283 runtime->oss.format = AFMT_U8; 2284 break; 2285 case SNDRV_MINOR_OSS_PCM_16: 2286 runtime->oss.format = AFMT_S16_LE; 2287 break; 2288 default: 2289 runtime->oss.format = AFMT_MU_LAW; 2290 } 2291 runtime->oss.channels = 1; 2292 runtime->oss.fragshift = 0; 2293 runtime->oss.maxfrags = 0; 2294 runtime->oss.subdivision = 0; 2295 substream->pcm_release = snd_pcm_oss_release_substream; 2296 } 2297 2298 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2299 { 2300 int cidx; 2301 if (!pcm_oss_file) 2302 return 0; 2303 for (cidx = 0; cidx < 2; ++cidx) { 2304 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2305 if (substream) 2306 snd_pcm_release_substream(substream); 2307 } 2308 kfree(pcm_oss_file); 2309 return 0; 2310 } 2311 2312 static int snd_pcm_oss_open_file(struct file *file, 2313 struct snd_pcm *pcm, 2314 struct snd_pcm_oss_file **rpcm_oss_file, 2315 int minor, 2316 struct snd_pcm_oss_setup *setup) 2317 { 2318 int idx, err; 2319 struct snd_pcm_oss_file *pcm_oss_file; 2320 struct snd_pcm_substream *substream; 2321 fmode_t f_mode = file->f_mode; 2322 2323 if (rpcm_oss_file) 2324 *rpcm_oss_file = NULL; 2325 2326 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2327 if (pcm_oss_file == NULL) 2328 return -ENOMEM; 2329 2330 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2331 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2332 f_mode = FMODE_WRITE; 2333 2334 file->f_flags &= ~O_APPEND; 2335 for (idx = 0; idx < 2; idx++) { 2336 if (setup[idx].disable) 2337 continue; 2338 if (! pcm->streams[idx].substream_count) 2339 continue; /* no matching substream */ 2340 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2341 if (! (f_mode & FMODE_WRITE)) 2342 continue; 2343 } else { 2344 if (! (f_mode & FMODE_READ)) 2345 continue; 2346 } 2347 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2348 if (err < 0) { 2349 snd_pcm_oss_release_file(pcm_oss_file); 2350 return err; 2351 } 2352 2353 pcm_oss_file->streams[idx] = substream; 2354 substream->file = pcm_oss_file; 2355 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2356 } 2357 2358 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2359 snd_pcm_oss_release_file(pcm_oss_file); 2360 return -EINVAL; 2361 } 2362 2363 file->private_data = pcm_oss_file; 2364 if (rpcm_oss_file) 2365 *rpcm_oss_file = pcm_oss_file; 2366 return 0; 2367 } 2368 2369 2370 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2371 { 2372 unsigned int idx; 2373 2374 if (snd_BUG_ON(!task || !name || size < 2)) 2375 return -EINVAL; 2376 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2377 name[idx] = task->comm[idx]; 2378 name[idx] = '\0'; 2379 return 0; 2380 } 2381 2382 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2383 { 2384 int err; 2385 char task_name[32]; 2386 struct snd_pcm *pcm; 2387 struct snd_pcm_oss_file *pcm_oss_file; 2388 struct snd_pcm_oss_setup setup[2]; 2389 int nonblock; 2390 wait_queue_t wait; 2391 2392 err = nonseekable_open(inode, file); 2393 if (err < 0) 2394 return err; 2395 2396 pcm = snd_lookup_oss_minor_data(iminor(inode), 2397 SNDRV_OSS_DEVICE_TYPE_PCM); 2398 if (pcm == NULL) { 2399 err = -ENODEV; 2400 goto __error1; 2401 } 2402 err = snd_card_file_add(pcm->card, file); 2403 if (err < 0) 2404 goto __error1; 2405 if (!try_module_get(pcm->card->module)) { 2406 err = -EFAULT; 2407 goto __error2; 2408 } 2409 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2410 err = -EFAULT; 2411 goto __error; 2412 } 2413 memset(setup, 0, sizeof(setup)); 2414 if (file->f_mode & FMODE_WRITE) 2415 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2416 task_name, &setup[0]); 2417 if (file->f_mode & FMODE_READ) 2418 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2419 task_name, &setup[1]); 2420 2421 nonblock = !!(file->f_flags & O_NONBLOCK); 2422 if (!nonblock) 2423 nonblock = nonblock_open; 2424 2425 init_waitqueue_entry(&wait, current); 2426 add_wait_queue(&pcm->open_wait, &wait); 2427 mutex_lock(&pcm->open_mutex); 2428 while (1) { 2429 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2430 iminor(inode), setup); 2431 if (err >= 0) 2432 break; 2433 if (err == -EAGAIN) { 2434 if (nonblock) { 2435 err = -EBUSY; 2436 break; 2437 } 2438 } else 2439 break; 2440 set_current_state(TASK_INTERRUPTIBLE); 2441 mutex_unlock(&pcm->open_mutex); 2442 schedule(); 2443 mutex_lock(&pcm->open_mutex); 2444 if (pcm->card->shutdown) { 2445 err = -ENODEV; 2446 break; 2447 } 2448 if (signal_pending(current)) { 2449 err = -ERESTARTSYS; 2450 break; 2451 } 2452 } 2453 remove_wait_queue(&pcm->open_wait, &wait); 2454 mutex_unlock(&pcm->open_mutex); 2455 if (err < 0) 2456 goto __error; 2457 snd_card_unref(pcm->card); 2458 return err; 2459 2460 __error: 2461 module_put(pcm->card->module); 2462 __error2: 2463 snd_card_file_remove(pcm->card, file); 2464 __error1: 2465 if (pcm) 2466 snd_card_unref(pcm->card); 2467 return err; 2468 } 2469 2470 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2471 { 2472 struct snd_pcm *pcm; 2473 struct snd_pcm_substream *substream; 2474 struct snd_pcm_oss_file *pcm_oss_file; 2475 2476 pcm_oss_file = file->private_data; 2477 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2478 if (substream == NULL) 2479 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2480 if (snd_BUG_ON(!substream)) 2481 return -ENXIO; 2482 pcm = substream->pcm; 2483 if (!pcm->card->shutdown) 2484 snd_pcm_oss_sync(pcm_oss_file); 2485 mutex_lock(&pcm->open_mutex); 2486 snd_pcm_oss_release_file(pcm_oss_file); 2487 mutex_unlock(&pcm->open_mutex); 2488 wake_up(&pcm->open_wait); 2489 module_put(pcm->card->module); 2490 snd_card_file_remove(pcm->card, file); 2491 return 0; 2492 } 2493 2494 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2495 { 2496 struct snd_pcm_oss_file *pcm_oss_file; 2497 int __user *p = (int __user *)arg; 2498 int res; 2499 2500 pcm_oss_file = file->private_data; 2501 if (cmd == OSS_GETVERSION) 2502 return put_user(SNDRV_OSS_VERSION, p); 2503 if (cmd == OSS_ALSAEMULVER) 2504 return put_user(1, p); 2505 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2506 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2507 struct snd_pcm_substream *substream; 2508 int idx; 2509 for (idx = 0; idx < 2; ++idx) { 2510 substream = pcm_oss_file->streams[idx]; 2511 if (substream != NULL) 2512 break; 2513 } 2514 if (snd_BUG_ON(idx >= 2)) 2515 return -ENXIO; 2516 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2517 } 2518 #endif 2519 if (((cmd >> 8) & 0xff) != 'P') 2520 return -EINVAL; 2521 #ifdef OSS_DEBUG 2522 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2523 #endif 2524 switch (cmd) { 2525 case SNDCTL_DSP_RESET: 2526 return snd_pcm_oss_reset(pcm_oss_file); 2527 case SNDCTL_DSP_SYNC: 2528 return snd_pcm_oss_sync(pcm_oss_file); 2529 case SNDCTL_DSP_SPEED: 2530 if (get_user(res, p)) 2531 return -EFAULT; 2532 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2533 return res; 2534 return put_user(res, p); 2535 case SOUND_PCM_READ_RATE: 2536 res = snd_pcm_oss_get_rate(pcm_oss_file); 2537 if (res < 0) 2538 return res; 2539 return put_user(res, p); 2540 case SNDCTL_DSP_STEREO: 2541 if (get_user(res, p)) 2542 return -EFAULT; 2543 res = res > 0 ? 2 : 1; 2544 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2545 return res; 2546 return put_user(--res, p); 2547 case SNDCTL_DSP_GETBLKSIZE: 2548 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2549 if (res < 0) 2550 return res; 2551 return put_user(res, p); 2552 case SNDCTL_DSP_SETFMT: 2553 if (get_user(res, p)) 2554 return -EFAULT; 2555 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2556 if (res < 0) 2557 return res; 2558 return put_user(res, p); 2559 case SOUND_PCM_READ_BITS: 2560 res = snd_pcm_oss_get_format(pcm_oss_file); 2561 if (res < 0) 2562 return res; 2563 return put_user(res, p); 2564 case SNDCTL_DSP_CHANNELS: 2565 if (get_user(res, p)) 2566 return -EFAULT; 2567 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2568 if (res < 0) 2569 return res; 2570 return put_user(res, p); 2571 case SOUND_PCM_READ_CHANNELS: 2572 res = snd_pcm_oss_get_channels(pcm_oss_file); 2573 if (res < 0) 2574 return res; 2575 return put_user(res, p); 2576 case SOUND_PCM_WRITE_FILTER: 2577 case SOUND_PCM_READ_FILTER: 2578 return -EIO; 2579 case SNDCTL_DSP_POST: 2580 return snd_pcm_oss_post(pcm_oss_file); 2581 case SNDCTL_DSP_SUBDIVIDE: 2582 if (get_user(res, p)) 2583 return -EFAULT; 2584 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2585 if (res < 0) 2586 return res; 2587 return put_user(res, p); 2588 case SNDCTL_DSP_SETFRAGMENT: 2589 if (get_user(res, p)) 2590 return -EFAULT; 2591 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2592 case SNDCTL_DSP_GETFMTS: 2593 res = snd_pcm_oss_get_formats(pcm_oss_file); 2594 if (res < 0) 2595 return res; 2596 return put_user(res, p); 2597 case SNDCTL_DSP_GETOSPACE: 2598 case SNDCTL_DSP_GETISPACE: 2599 return snd_pcm_oss_get_space(pcm_oss_file, 2600 cmd == SNDCTL_DSP_GETISPACE ? 2601 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2602 (struct audio_buf_info __user *) arg); 2603 case SNDCTL_DSP_NONBLOCK: 2604 return snd_pcm_oss_nonblock(file); 2605 case SNDCTL_DSP_GETCAPS: 2606 res = snd_pcm_oss_get_caps(pcm_oss_file); 2607 if (res < 0) 2608 return res; 2609 return put_user(res, p); 2610 case SNDCTL_DSP_GETTRIGGER: 2611 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2612 if (res < 0) 2613 return res; 2614 return put_user(res, p); 2615 case SNDCTL_DSP_SETTRIGGER: 2616 if (get_user(res, p)) 2617 return -EFAULT; 2618 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2619 case SNDCTL_DSP_GETIPTR: 2620 case SNDCTL_DSP_GETOPTR: 2621 return snd_pcm_oss_get_ptr(pcm_oss_file, 2622 cmd == SNDCTL_DSP_GETIPTR ? 2623 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2624 (struct count_info __user *) arg); 2625 case SNDCTL_DSP_MAPINBUF: 2626 case SNDCTL_DSP_MAPOUTBUF: 2627 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2628 cmd == SNDCTL_DSP_MAPINBUF ? 2629 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2630 (struct buffmem_desc __user *) arg); 2631 case SNDCTL_DSP_SETSYNCRO: 2632 /* stop DMA now.. */ 2633 return 0; 2634 case SNDCTL_DSP_SETDUPLEX: 2635 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2636 return 0; 2637 return -EIO; 2638 case SNDCTL_DSP_GETODELAY: 2639 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2640 if (res < 0) { 2641 /* it's for sure, some broken apps don't check for error codes */ 2642 put_user(0, p); 2643 return res; 2644 } 2645 return put_user(res, p); 2646 case SNDCTL_DSP_PROFILE: 2647 return 0; /* silently ignore */ 2648 default: 2649 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2650 } 2651 return -EINVAL; 2652 } 2653 2654 #ifdef CONFIG_COMPAT 2655 /* all compatible */ 2656 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2657 unsigned long arg) 2658 { 2659 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2660 } 2661 #else 2662 #define snd_pcm_oss_ioctl_compat NULL 2663 #endif 2664 2665 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2666 { 2667 struct snd_pcm_oss_file *pcm_oss_file; 2668 struct snd_pcm_substream *substream; 2669 2670 pcm_oss_file = file->private_data; 2671 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2672 if (substream == NULL) 2673 return -ENXIO; 2674 substream->f_flags = file->f_flags & O_NONBLOCK; 2675 #ifndef OSS_DEBUG 2676 return snd_pcm_oss_read1(substream, buf, count); 2677 #else 2678 { 2679 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2680 pcm_dbg(substream->pcm, 2681 "pcm_oss: read %li bytes (returned %li bytes)\n", 2682 (long)count, (long)res); 2683 return res; 2684 } 2685 #endif 2686 } 2687 2688 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2689 { 2690 struct snd_pcm_oss_file *pcm_oss_file; 2691 struct snd_pcm_substream *substream; 2692 long result; 2693 2694 pcm_oss_file = file->private_data; 2695 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2696 if (substream == NULL) 2697 return -ENXIO; 2698 substream->f_flags = file->f_flags & O_NONBLOCK; 2699 result = snd_pcm_oss_write1(substream, buf, count); 2700 #ifdef OSS_DEBUG 2701 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2702 (long)count, (long)result); 2703 #endif 2704 return result; 2705 } 2706 2707 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2708 { 2709 struct snd_pcm_runtime *runtime = substream->runtime; 2710 if (atomic_read(&substream->mmap_count)) 2711 return runtime->oss.prev_hw_ptr_period != 2712 get_hw_ptr_period(runtime); 2713 else 2714 return snd_pcm_playback_avail(runtime) >= 2715 runtime->oss.period_frames; 2716 } 2717 2718 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2719 { 2720 struct snd_pcm_runtime *runtime = substream->runtime; 2721 if (atomic_read(&substream->mmap_count)) 2722 return runtime->oss.prev_hw_ptr_period != 2723 get_hw_ptr_period(runtime); 2724 else 2725 return snd_pcm_capture_avail(runtime) >= 2726 runtime->oss.period_frames; 2727 } 2728 2729 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2730 { 2731 struct snd_pcm_oss_file *pcm_oss_file; 2732 unsigned int mask; 2733 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2734 2735 pcm_oss_file = file->private_data; 2736 2737 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2738 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2739 2740 mask = 0; 2741 if (psubstream != NULL) { 2742 struct snd_pcm_runtime *runtime = psubstream->runtime; 2743 poll_wait(file, &runtime->sleep, wait); 2744 snd_pcm_stream_lock_irq(psubstream); 2745 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2746 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2747 snd_pcm_oss_playback_ready(psubstream))) 2748 mask |= POLLOUT | POLLWRNORM; 2749 snd_pcm_stream_unlock_irq(psubstream); 2750 } 2751 if (csubstream != NULL) { 2752 struct snd_pcm_runtime *runtime = csubstream->runtime; 2753 snd_pcm_state_t ostate; 2754 poll_wait(file, &runtime->sleep, wait); 2755 snd_pcm_stream_lock_irq(csubstream); 2756 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2757 snd_pcm_oss_capture_ready(csubstream)) 2758 mask |= POLLIN | POLLRDNORM; 2759 snd_pcm_stream_unlock_irq(csubstream); 2760 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2761 struct snd_pcm_oss_file ofile; 2762 memset(&ofile, 0, sizeof(ofile)); 2763 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2764 runtime->oss.trigger = 0; 2765 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2766 } 2767 } 2768 2769 return mask; 2770 } 2771 2772 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2773 { 2774 struct snd_pcm_oss_file *pcm_oss_file; 2775 struct snd_pcm_substream *substream = NULL; 2776 struct snd_pcm_runtime *runtime; 2777 int err; 2778 2779 #ifdef OSS_DEBUG 2780 pr_debug("pcm_oss: mmap begin\n"); 2781 #endif 2782 pcm_oss_file = file->private_data; 2783 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2784 case VM_READ | VM_WRITE: 2785 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2786 if (substream) 2787 break; 2788 /* Fall through */ 2789 case VM_READ: 2790 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2791 break; 2792 case VM_WRITE: 2793 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2794 break; 2795 default: 2796 return -EINVAL; 2797 } 2798 /* set VM_READ access as well to fix memset() routines that do 2799 reads before writes (to improve performance) */ 2800 area->vm_flags |= VM_READ; 2801 if (substream == NULL) 2802 return -ENXIO; 2803 runtime = substream->runtime; 2804 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2805 return -EIO; 2806 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2807 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2808 else 2809 return -EIO; 2810 2811 if (runtime->oss.params) { 2812 /* use mutex_trylock() for params_lock for avoiding a deadlock 2813 * between mmap_sem and params_lock taken by 2814 * copy_from/to_user() in snd_pcm_oss_write/read() 2815 */ 2816 err = snd_pcm_oss_change_params(substream, true); 2817 if (err < 0) 2818 return err; 2819 } 2820 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2821 if (runtime->oss.plugin_first != NULL) 2822 return -EIO; 2823 #endif 2824 2825 if (area->vm_pgoff != 0) 2826 return -EINVAL; 2827 2828 err = snd_pcm_mmap_data(substream, file, area); 2829 if (err < 0) 2830 return err; 2831 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2832 runtime->silence_threshold = 0; 2833 runtime->silence_size = 0; 2834 #ifdef OSS_DEBUG 2835 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2836 runtime->oss.mmap_bytes); 2837 #endif 2838 /* In mmap mode we never stop */ 2839 runtime->stop_threshold = runtime->boundary; 2840 2841 return 0; 2842 } 2843 2844 #ifdef CONFIG_SND_VERBOSE_PROCFS 2845 /* 2846 * /proc interface 2847 */ 2848 2849 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2850 struct snd_info_buffer *buffer) 2851 { 2852 struct snd_pcm_str *pstr = entry->private_data; 2853 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2854 mutex_lock(&pstr->oss.setup_mutex); 2855 while (setup) { 2856 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2857 setup->task_name, 2858 setup->periods, 2859 setup->period_size, 2860 setup->disable ? " disable" : "", 2861 setup->direct ? " direct" : "", 2862 setup->block ? " block" : "", 2863 setup->nonblock ? " non-block" : "", 2864 setup->partialfrag ? " partial-frag" : "", 2865 setup->nosilence ? " no-silence" : ""); 2866 setup = setup->next; 2867 } 2868 mutex_unlock(&pstr->oss.setup_mutex); 2869 } 2870 2871 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2872 { 2873 struct snd_pcm_oss_setup *setup, *setupn; 2874 2875 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2876 setup; setup = setupn) { 2877 setupn = setup->next; 2878 kfree(setup->task_name); 2879 kfree(setup); 2880 } 2881 pstr->oss.setup_list = NULL; 2882 } 2883 2884 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2885 struct snd_info_buffer *buffer) 2886 { 2887 struct snd_pcm_str *pstr = entry->private_data; 2888 char line[128], str[32], task_name[32]; 2889 const char *ptr; 2890 int idx1; 2891 struct snd_pcm_oss_setup *setup, *setup1, template; 2892 2893 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2894 mutex_lock(&pstr->oss.setup_mutex); 2895 memset(&template, 0, sizeof(template)); 2896 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2897 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2898 snd_pcm_oss_proc_free_setup_list(pstr); 2899 mutex_unlock(&pstr->oss.setup_mutex); 2900 continue; 2901 } 2902 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2903 if (!strcmp(setup->task_name, task_name)) { 2904 template = *setup; 2905 break; 2906 } 2907 } 2908 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2909 template.periods = simple_strtoul(str, NULL, 10); 2910 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2911 template.period_size = simple_strtoul(str, NULL, 10); 2912 for (idx1 = 31; idx1 >= 0; idx1--) 2913 if (template.period_size & (1 << idx1)) 2914 break; 2915 for (idx1--; idx1 >= 0; idx1--) 2916 template.period_size &= ~(1 << idx1); 2917 do { 2918 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2919 if (!strcmp(str, "disable")) { 2920 template.disable = 1; 2921 } else if (!strcmp(str, "direct")) { 2922 template.direct = 1; 2923 } else if (!strcmp(str, "block")) { 2924 template.block = 1; 2925 } else if (!strcmp(str, "non-block")) { 2926 template.nonblock = 1; 2927 } else if (!strcmp(str, "partial-frag")) { 2928 template.partialfrag = 1; 2929 } else if (!strcmp(str, "no-silence")) { 2930 template.nosilence = 1; 2931 } else if (!strcmp(str, "buggy-ptr")) { 2932 template.buggyptr = 1; 2933 } 2934 } while (*str); 2935 if (setup == NULL) { 2936 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2937 if (! setup) { 2938 buffer->error = -ENOMEM; 2939 mutex_unlock(&pstr->oss.setup_mutex); 2940 return; 2941 } 2942 if (pstr->oss.setup_list == NULL) 2943 pstr->oss.setup_list = setup; 2944 else { 2945 for (setup1 = pstr->oss.setup_list; 2946 setup1->next; setup1 = setup1->next); 2947 setup1->next = setup; 2948 } 2949 template.task_name = kstrdup(task_name, GFP_KERNEL); 2950 if (! template.task_name) { 2951 kfree(setup); 2952 buffer->error = -ENOMEM; 2953 mutex_unlock(&pstr->oss.setup_mutex); 2954 return; 2955 } 2956 } 2957 *setup = template; 2958 mutex_unlock(&pstr->oss.setup_mutex); 2959 } 2960 } 2961 2962 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2963 { 2964 int stream; 2965 for (stream = 0; stream < 2; ++stream) { 2966 struct snd_info_entry *entry; 2967 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2968 if (pstr->substream_count == 0) 2969 continue; 2970 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2971 entry->content = SNDRV_INFO_CONTENT_TEXT; 2972 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2973 entry->c.text.read = snd_pcm_oss_proc_read; 2974 entry->c.text.write = snd_pcm_oss_proc_write; 2975 entry->private_data = pstr; 2976 if (snd_info_register(entry) < 0) { 2977 snd_info_free_entry(entry); 2978 entry = NULL; 2979 } 2980 } 2981 pstr->oss.proc_entry = entry; 2982 } 2983 } 2984 2985 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2986 { 2987 int stream; 2988 for (stream = 0; stream < 2; ++stream) { 2989 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2990 snd_info_free_entry(pstr->oss.proc_entry); 2991 pstr->oss.proc_entry = NULL; 2992 snd_pcm_oss_proc_free_setup_list(pstr); 2993 } 2994 } 2995 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2996 #define snd_pcm_oss_proc_init(pcm) 2997 #define snd_pcm_oss_proc_done(pcm) 2998 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2999 3000 /* 3001 * ENTRY functions 3002 */ 3003 3004 static const struct file_operations snd_pcm_oss_f_reg = 3005 { 3006 .owner = THIS_MODULE, 3007 .read = snd_pcm_oss_read, 3008 .write = snd_pcm_oss_write, 3009 .open = snd_pcm_oss_open, 3010 .release = snd_pcm_oss_release, 3011 .llseek = no_llseek, 3012 .poll = snd_pcm_oss_poll, 3013 .unlocked_ioctl = snd_pcm_oss_ioctl, 3014 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3015 .mmap = snd_pcm_oss_mmap, 3016 }; 3017 3018 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3019 { 3020 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3021 pcm->card, index, &snd_pcm_oss_f_reg, 3022 pcm) < 0) { 3023 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3024 pcm->card->number, pcm->device); 3025 } 3026 } 3027 3028 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3029 { 3030 pcm->oss.reg = 0; 3031 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3032 char name[128]; 3033 int duplex; 3034 register_oss_dsp(pcm, 0); 3035 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3036 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3037 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3038 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3039 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3040 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3041 pcm->card->number, 3042 name); 3043 #endif 3044 pcm->oss.reg++; 3045 pcm->oss.reg_mask |= 1; 3046 } 3047 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3048 register_oss_dsp(pcm, 1); 3049 pcm->oss.reg++; 3050 pcm->oss.reg_mask |= 2; 3051 } 3052 3053 if (pcm->oss.reg) 3054 snd_pcm_oss_proc_init(pcm); 3055 3056 return 0; 3057 } 3058 3059 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3060 { 3061 if (pcm->oss.reg) { 3062 if (pcm->oss.reg_mask & 1) { 3063 pcm->oss.reg_mask &= ~1; 3064 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3065 pcm->card, 0); 3066 } 3067 if (pcm->oss.reg_mask & 2) { 3068 pcm->oss.reg_mask &= ~2; 3069 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3070 pcm->card, 1); 3071 } 3072 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3073 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3074 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3075 #endif 3076 } 3077 pcm->oss.reg = 0; 3078 } 3079 return 0; 3080 } 3081 3082 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3083 { 3084 snd_pcm_oss_disconnect_minor(pcm); 3085 snd_pcm_oss_proc_done(pcm); 3086 return 0; 3087 } 3088 3089 static struct snd_pcm_notify snd_pcm_oss_notify = 3090 { 3091 .n_register = snd_pcm_oss_register_minor, 3092 .n_disconnect = snd_pcm_oss_disconnect_minor, 3093 .n_unregister = snd_pcm_oss_unregister_minor, 3094 }; 3095 3096 static int __init alsa_pcm_oss_init(void) 3097 { 3098 int i; 3099 int err; 3100 3101 /* check device map table */ 3102 for (i = 0; i < SNDRV_CARDS; i++) { 3103 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3104 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3105 i, dsp_map[i]); 3106 dsp_map[i] = 0; 3107 } 3108 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3109 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3110 i, adsp_map[i]); 3111 adsp_map[i] = 1; 3112 } 3113 } 3114 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3115 return err; 3116 return 0; 3117 } 3118 3119 static void __exit alsa_pcm_oss_exit(void) 3120 { 3121 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3122 } 3123 3124 module_init(alsa_pcm_oss_init) 3125 module_exit(alsa_pcm_oss_exit) 3126