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 /* 71 * helper functions to process hw_params 72 */ 73 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 74 { 75 int changed = 0; 76 if (i->min < min) { 77 i->min = min; 78 i->openmin = openmin; 79 changed = 1; 80 } else if (i->min == min && !i->openmin && openmin) { 81 i->openmin = 1; 82 changed = 1; 83 } 84 if (i->integer) { 85 if (i->openmin) { 86 i->min++; 87 i->openmin = 0; 88 } 89 } 90 if (snd_interval_checkempty(i)) { 91 snd_interval_none(i); 92 return -EINVAL; 93 } 94 return changed; 95 } 96 97 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 98 { 99 int changed = 0; 100 if (i->max > max) { 101 i->max = max; 102 i->openmax = openmax; 103 changed = 1; 104 } else if (i->max == max && !i->openmax && openmax) { 105 i->openmax = 1; 106 changed = 1; 107 } 108 if (i->integer) { 109 if (i->openmax) { 110 i->max--; 111 i->openmax = 0; 112 } 113 } 114 if (snd_interval_checkempty(i)) { 115 snd_interval_none(i); 116 return -EINVAL; 117 } 118 return changed; 119 } 120 121 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 122 { 123 struct snd_interval t; 124 t.empty = 0; 125 t.min = t.max = val; 126 t.openmin = t.openmax = 0; 127 t.integer = 1; 128 return snd_interval_refine(i, &t); 129 } 130 131 /** 132 * snd_pcm_hw_param_value_min 133 * @params: the hw_params instance 134 * @var: parameter to retrieve 135 * @dir: pointer to the direction (-1,0,1) or NULL 136 * 137 * Return the minimum value for field PAR. 138 */ 139 static unsigned int 140 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 141 snd_pcm_hw_param_t var, int *dir) 142 { 143 if (hw_is_mask(var)) { 144 if (dir) 145 *dir = 0; 146 return snd_mask_min(hw_param_mask_c(params, var)); 147 } 148 if (hw_is_interval(var)) { 149 const struct snd_interval *i = hw_param_interval_c(params, var); 150 if (dir) 151 *dir = i->openmin; 152 return snd_interval_min(i); 153 } 154 return -EINVAL; 155 } 156 157 /** 158 * snd_pcm_hw_param_value_max 159 * @params: the hw_params instance 160 * @var: parameter to retrieve 161 * @dir: pointer to the direction (-1,0,1) or NULL 162 * 163 * Return the maximum value for field PAR. 164 */ 165 static unsigned int 166 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 167 snd_pcm_hw_param_t var, int *dir) 168 { 169 if (hw_is_mask(var)) { 170 if (dir) 171 *dir = 0; 172 return snd_mask_max(hw_param_mask_c(params, var)); 173 } 174 if (hw_is_interval(var)) { 175 const struct snd_interval *i = hw_param_interval_c(params, var); 176 if (dir) 177 *dir = - (int) i->openmax; 178 return snd_interval_max(i); 179 } 180 return -EINVAL; 181 } 182 183 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 184 snd_pcm_hw_param_t var, 185 const struct snd_mask *val) 186 { 187 int changed; 188 changed = snd_mask_refine(hw_param_mask(params, var), val); 189 if (changed > 0) { 190 params->cmask |= 1 << var; 191 params->rmask |= 1 << var; 192 } 193 return changed; 194 } 195 196 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 197 struct snd_pcm_hw_params *params, 198 snd_pcm_hw_param_t var, 199 const struct snd_mask *val) 200 { 201 int changed = _snd_pcm_hw_param_mask(params, var, val); 202 if (changed < 0) 203 return changed; 204 if (params->rmask) { 205 int err = snd_pcm_hw_refine(pcm, params); 206 if (err < 0) 207 return err; 208 } 209 return 0; 210 } 211 212 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 213 snd_pcm_hw_param_t var, unsigned int val, 214 int dir) 215 { 216 int changed; 217 int open = 0; 218 if (dir) { 219 if (dir > 0) { 220 open = 1; 221 } else if (dir < 0) { 222 if (val > 0) { 223 open = 1; 224 val--; 225 } 226 } 227 } 228 if (hw_is_mask(var)) 229 changed = snd_mask_refine_min(hw_param_mask(params, var), 230 val + !!open); 231 else if (hw_is_interval(var)) 232 changed = snd_interval_refine_min(hw_param_interval(params, var), 233 val, open); 234 else 235 return -EINVAL; 236 if (changed > 0) { 237 params->cmask |= 1 << var; 238 params->rmask |= 1 << var; 239 } 240 return changed; 241 } 242 243 /** 244 * snd_pcm_hw_param_min 245 * @pcm: PCM instance 246 * @params: the hw_params instance 247 * @var: parameter to retrieve 248 * @val: minimal value 249 * @dir: pointer to the direction (-1,0,1) or NULL 250 * 251 * Inside configuration space defined by PARAMS remove from PAR all 252 * values < VAL. Reduce configuration space accordingly. 253 * Return new minimum or -EINVAL if the configuration space is empty 254 */ 255 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 256 struct snd_pcm_hw_params *params, 257 snd_pcm_hw_param_t var, unsigned int val, 258 int *dir) 259 { 260 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 261 if (changed < 0) 262 return changed; 263 if (params->rmask) { 264 int err = snd_pcm_hw_refine(pcm, params); 265 if (err < 0) 266 return err; 267 } 268 return snd_pcm_hw_param_value_min(params, var, dir); 269 } 270 271 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 272 snd_pcm_hw_param_t var, unsigned int val, 273 int dir) 274 { 275 int changed; 276 int open = 0; 277 if (dir) { 278 if (dir < 0) { 279 open = 1; 280 } else if (dir > 0) { 281 open = 1; 282 val++; 283 } 284 } 285 if (hw_is_mask(var)) { 286 if (val == 0 && open) { 287 snd_mask_none(hw_param_mask(params, var)); 288 changed = -EINVAL; 289 } else 290 changed = snd_mask_refine_max(hw_param_mask(params, var), 291 val - !!open); 292 } else if (hw_is_interval(var)) 293 changed = snd_interval_refine_max(hw_param_interval(params, var), 294 val, open); 295 else 296 return -EINVAL; 297 if (changed > 0) { 298 params->cmask |= 1 << var; 299 params->rmask |= 1 << var; 300 } 301 return changed; 302 } 303 304 /** 305 * snd_pcm_hw_param_max 306 * @pcm: PCM instance 307 * @params: the hw_params instance 308 * @var: parameter to retrieve 309 * @val: maximal value 310 * @dir: pointer to the direction (-1,0,1) or NULL 311 * 312 * Inside configuration space defined by PARAMS remove from PAR all 313 * values >= VAL + 1. Reduce configuration space accordingly. 314 * Return new maximum or -EINVAL if the configuration space is empty 315 */ 316 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 317 struct snd_pcm_hw_params *params, 318 snd_pcm_hw_param_t var, unsigned int val, 319 int *dir) 320 { 321 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 322 if (changed < 0) 323 return changed; 324 if (params->rmask) { 325 int err = snd_pcm_hw_refine(pcm, params); 326 if (err < 0) 327 return err; 328 } 329 return snd_pcm_hw_param_value_max(params, var, dir); 330 } 331 332 static int boundary_sub(int a, int adir, 333 int b, int bdir, 334 int *c, int *cdir) 335 { 336 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 337 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 338 *c = a - b; 339 *cdir = adir - bdir; 340 if (*cdir == -2) { 341 (*c)--; 342 } else if (*cdir == 2) { 343 (*c)++; 344 } 345 return 0; 346 } 347 348 static int boundary_lt(unsigned int a, int adir, 349 unsigned int b, int bdir) 350 { 351 if (adir < 0) { 352 a--; 353 adir = 1; 354 } else if (adir > 0) 355 adir = 1; 356 if (bdir < 0) { 357 b--; 358 bdir = 1; 359 } else if (bdir > 0) 360 bdir = 1; 361 return a < b || (a == b && adir < bdir); 362 } 363 364 /* Return 1 if min is nearer to best than max */ 365 static int boundary_nearer(int min, int mindir, 366 int best, int bestdir, 367 int max, int maxdir) 368 { 369 int dmin, dmindir; 370 int dmax, dmaxdir; 371 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 372 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 373 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 374 } 375 376 /** 377 * snd_pcm_hw_param_near 378 * @pcm: PCM instance 379 * @params: the hw_params instance 380 * @var: parameter to retrieve 381 * @best: value to set 382 * @dir: pointer to the direction (-1,0,1) or NULL 383 * 384 * Inside configuration space defined by PARAMS set PAR to the available value 385 * nearest to VAL. Reduce configuration space accordingly. 386 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 387 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 388 * Return the value found. 389 */ 390 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 391 struct snd_pcm_hw_params *params, 392 snd_pcm_hw_param_t var, unsigned int best, 393 int *dir) 394 { 395 struct snd_pcm_hw_params *save = NULL; 396 int v; 397 unsigned int saved_min; 398 int last = 0; 399 int min, max; 400 int mindir, maxdir; 401 int valdir = dir ? *dir : 0; 402 /* FIXME */ 403 if (best > INT_MAX) 404 best = INT_MAX; 405 min = max = best; 406 mindir = maxdir = valdir; 407 if (maxdir > 0) 408 maxdir = 0; 409 else if (maxdir == 0) 410 maxdir = -1; 411 else { 412 maxdir = 1; 413 max--; 414 } 415 save = kmalloc(sizeof(*save), GFP_KERNEL); 416 if (save == NULL) 417 return -ENOMEM; 418 *save = *params; 419 saved_min = min; 420 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 421 if (min >= 0) { 422 struct snd_pcm_hw_params *params1; 423 if (max < 0) 424 goto _end; 425 if ((unsigned int)min == saved_min && mindir == valdir) 426 goto _end; 427 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 428 if (params1 == NULL) { 429 kfree(save); 430 return -ENOMEM; 431 } 432 *params1 = *save; 433 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 434 if (max < 0) { 435 kfree(params1); 436 goto _end; 437 } 438 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 439 *params = *params1; 440 last = 1; 441 } 442 kfree(params1); 443 } else { 444 *params = *save; 445 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 446 if (max < 0) { 447 kfree(save); 448 return max; 449 } 450 last = 1; 451 } 452 _end: 453 kfree(save); 454 if (last) 455 v = snd_pcm_hw_param_last(pcm, params, var, dir); 456 else 457 v = snd_pcm_hw_param_first(pcm, params, var, dir); 458 return v; 459 } 460 461 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 462 snd_pcm_hw_param_t var, unsigned int val, 463 int dir) 464 { 465 int changed; 466 if (hw_is_mask(var)) { 467 struct snd_mask *m = hw_param_mask(params, var); 468 if (val == 0 && dir < 0) { 469 changed = -EINVAL; 470 snd_mask_none(m); 471 } else { 472 if (dir > 0) 473 val++; 474 else if (dir < 0) 475 val--; 476 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 477 } 478 } else if (hw_is_interval(var)) { 479 struct snd_interval *i = hw_param_interval(params, var); 480 if (val == 0 && dir < 0) { 481 changed = -EINVAL; 482 snd_interval_none(i); 483 } else if (dir == 0) 484 changed = snd_interval_refine_set(i, val); 485 else { 486 struct snd_interval t; 487 t.openmin = 1; 488 t.openmax = 1; 489 t.empty = 0; 490 t.integer = 0; 491 if (dir < 0) { 492 t.min = val - 1; 493 t.max = val; 494 } else { 495 t.min = val; 496 t.max = val+1; 497 } 498 changed = snd_interval_refine(i, &t); 499 } 500 } else 501 return -EINVAL; 502 if (changed > 0) { 503 params->cmask |= 1 << var; 504 params->rmask |= 1 << var; 505 } 506 return changed; 507 } 508 509 /** 510 * snd_pcm_hw_param_set 511 * @pcm: PCM instance 512 * @params: the hw_params instance 513 * @var: parameter to retrieve 514 * @val: value to set 515 * @dir: pointer to the direction (-1,0,1) or NULL 516 * 517 * Inside configuration space defined by PARAMS remove from PAR all 518 * values != VAL. Reduce configuration space accordingly. 519 * Return VAL or -EINVAL if the configuration space is empty 520 */ 521 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 522 struct snd_pcm_hw_params *params, 523 snd_pcm_hw_param_t var, unsigned int val, 524 int dir) 525 { 526 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 527 if (changed < 0) 528 return changed; 529 if (params->rmask) { 530 int err = snd_pcm_hw_refine(pcm, params); 531 if (err < 0) 532 return err; 533 } 534 return snd_pcm_hw_param_value(params, var, NULL); 535 } 536 537 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 538 snd_pcm_hw_param_t var) 539 { 540 int changed; 541 changed = snd_interval_setinteger(hw_param_interval(params, var)); 542 if (changed > 0) { 543 params->cmask |= 1 << var; 544 params->rmask |= 1 << var; 545 } 546 return changed; 547 } 548 549 /* 550 * plugin 551 */ 552 553 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 554 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 555 { 556 struct snd_pcm_runtime *runtime = substream->runtime; 557 struct snd_pcm_plugin *plugin, *next; 558 559 plugin = runtime->oss.plugin_first; 560 while (plugin) { 561 next = plugin->next; 562 snd_pcm_plugin_free(plugin); 563 plugin = next; 564 } 565 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 566 return 0; 567 } 568 569 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 570 { 571 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 572 plugin->next = runtime->oss.plugin_first; 573 plugin->prev = NULL; 574 if (runtime->oss.plugin_first) { 575 runtime->oss.plugin_first->prev = plugin; 576 runtime->oss.plugin_first = plugin; 577 } else { 578 runtime->oss.plugin_last = 579 runtime->oss.plugin_first = plugin; 580 } 581 return 0; 582 } 583 584 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 585 { 586 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 587 plugin->next = NULL; 588 plugin->prev = runtime->oss.plugin_last; 589 if (runtime->oss.plugin_last) { 590 runtime->oss.plugin_last->next = plugin; 591 runtime->oss.plugin_last = plugin; 592 } else { 593 runtime->oss.plugin_last = 594 runtime->oss.plugin_first = plugin; 595 } 596 return 0; 597 } 598 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 599 600 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 601 { 602 struct snd_pcm_runtime *runtime = substream->runtime; 603 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 604 long bytes = frames_to_bytes(runtime, frames); 605 if (buffer_size == runtime->oss.buffer_bytes) 606 return bytes; 607 #if BITS_PER_LONG >= 64 608 return runtime->oss.buffer_bytes * bytes / buffer_size; 609 #else 610 { 611 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 612 return div_u64(bsize, buffer_size); 613 } 614 #endif 615 } 616 617 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 618 { 619 struct snd_pcm_runtime *runtime = substream->runtime; 620 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 621 if (buffer_size == runtime->oss.buffer_bytes) 622 return bytes_to_frames(runtime, bytes); 623 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 624 } 625 626 static inline 627 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 628 { 629 return runtime->hw_ptr_interrupt; 630 } 631 632 /* define extended formats in the recent OSS versions (if any) */ 633 /* linear formats */ 634 #define AFMT_S32_LE 0x00001000 635 #define AFMT_S32_BE 0x00002000 636 #define AFMT_S24_LE 0x00008000 637 #define AFMT_S24_BE 0x00010000 638 #define AFMT_S24_PACKED 0x00040000 639 640 /* other supported formats */ 641 #define AFMT_FLOAT 0x00004000 642 #define AFMT_SPDIF_RAW 0x00020000 643 644 /* unsupported formats */ 645 #define AFMT_AC3 0x00000400 646 #define AFMT_VORBIS 0x00000800 647 648 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 649 { 650 switch (format) { 651 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 652 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 653 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 654 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 655 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 656 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 657 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 658 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 659 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 660 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 661 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 662 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 663 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 664 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 665 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 666 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 667 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 668 default: return SNDRV_PCM_FORMAT_U8; 669 } 670 } 671 672 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 673 { 674 switch (format) { 675 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 676 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 677 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 678 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 679 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 680 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 681 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 682 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 683 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 684 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 685 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 686 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 687 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 688 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 689 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 690 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 691 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 692 default: return -EINVAL; 693 } 694 } 695 696 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 697 struct snd_pcm_hw_params *oss_params, 698 struct snd_pcm_hw_params *slave_params) 699 { 700 size_t s; 701 size_t oss_buffer_size, oss_period_size, oss_periods; 702 size_t min_period_size, max_period_size; 703 struct snd_pcm_runtime *runtime = substream->runtime; 704 size_t oss_frame_size; 705 706 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 707 params_channels(oss_params) / 8; 708 709 oss_buffer_size = snd_pcm_plug_client_size(substream, 710 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 711 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 712 if (atomic_read(&substream->mmap_count)) { 713 if (oss_buffer_size > runtime->oss.mmap_bytes) 714 oss_buffer_size = runtime->oss.mmap_bytes; 715 } 716 717 if (substream->oss.setup.period_size > 16) 718 oss_period_size = substream->oss.setup.period_size; 719 else if (runtime->oss.fragshift) { 720 oss_period_size = 1 << runtime->oss.fragshift; 721 if (oss_period_size > oss_buffer_size / 2) 722 oss_period_size = oss_buffer_size / 2; 723 } else { 724 int sd; 725 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 726 727 oss_period_size = oss_buffer_size; 728 do { 729 oss_period_size /= 2; 730 } while (oss_period_size > bytes_per_sec); 731 if (runtime->oss.subdivision == 0) { 732 sd = 4; 733 if (oss_period_size / sd > 4096) 734 sd *= 2; 735 if (oss_period_size / sd < 4096) 736 sd = 1; 737 } else 738 sd = runtime->oss.subdivision; 739 oss_period_size /= sd; 740 if (oss_period_size < 16) 741 oss_period_size = 16; 742 } 743 744 min_period_size = snd_pcm_plug_client_size(substream, 745 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 746 min_period_size *= oss_frame_size; 747 min_period_size = roundup_pow_of_two(min_period_size); 748 if (oss_period_size < min_period_size) 749 oss_period_size = min_period_size; 750 751 max_period_size = snd_pcm_plug_client_size(substream, 752 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 753 max_period_size *= oss_frame_size; 754 max_period_size = rounddown_pow_of_two(max_period_size); 755 if (oss_period_size > max_period_size) 756 oss_period_size = max_period_size; 757 758 oss_periods = oss_buffer_size / oss_period_size; 759 760 if (substream->oss.setup.periods > 1) 761 oss_periods = substream->oss.setup.periods; 762 763 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 764 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 765 s = runtime->oss.maxfrags; 766 if (oss_periods > s) 767 oss_periods = s; 768 769 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 770 if (s < 2) 771 s = 2; 772 if (oss_periods < s) 773 oss_periods = s; 774 775 while (oss_period_size * oss_periods > oss_buffer_size) 776 oss_period_size /= 2; 777 778 if (oss_period_size < 16) 779 return -EINVAL; 780 runtime->oss.period_bytes = oss_period_size; 781 runtime->oss.period_frames = 1; 782 runtime->oss.periods = oss_periods; 783 return 0; 784 } 785 786 static int choose_rate(struct snd_pcm_substream *substream, 787 struct snd_pcm_hw_params *params, unsigned int best_rate) 788 { 789 const struct snd_interval *it; 790 struct snd_pcm_hw_params *save; 791 unsigned int rate, prev; 792 793 save = kmalloc(sizeof(*save), GFP_KERNEL); 794 if (save == NULL) 795 return -ENOMEM; 796 *save = *params; 797 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); 798 799 /* try multiples of the best rate */ 800 rate = best_rate; 801 for (;;) { 802 if (it->max < rate || (it->max == rate && it->openmax)) 803 break; 804 if (it->min < rate || (it->min == rate && !it->openmin)) { 805 int ret; 806 ret = snd_pcm_hw_param_set(substream, params, 807 SNDRV_PCM_HW_PARAM_RATE, 808 rate, 0); 809 if (ret == (int)rate) { 810 kfree(save); 811 return rate; 812 } 813 *params = *save; 814 } 815 prev = rate; 816 rate += best_rate; 817 if (rate <= prev) 818 break; 819 } 820 821 /* not found, use the nearest rate */ 822 kfree(save); 823 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 824 } 825 826 /* parameter locking: returns immediately if tried during streaming */ 827 static int lock_params(struct snd_pcm_runtime *runtime) 828 { 829 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 830 return -ERESTARTSYS; 831 if (atomic_read(&runtime->oss.rw_ref)) { 832 mutex_unlock(&runtime->oss.params_lock); 833 return -EBUSY; 834 } 835 return 0; 836 } 837 838 static void unlock_params(struct snd_pcm_runtime *runtime) 839 { 840 mutex_unlock(&runtime->oss.params_lock); 841 } 842 843 /* call with params_lock held */ 844 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) 845 { 846 struct snd_pcm_runtime *runtime = substream->runtime; 847 struct snd_pcm_hw_params *params, *sparams; 848 struct snd_pcm_sw_params *sw_params; 849 ssize_t oss_buffer_size, oss_period_size; 850 size_t oss_frame_size; 851 int err; 852 int direct; 853 snd_pcm_format_t format, sformat; 854 int n; 855 const struct snd_mask *sformat_mask; 856 struct snd_mask mask; 857 858 if (!runtime->oss.params) 859 return 0; 860 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 861 params = kmalloc(sizeof(*params), GFP_KERNEL); 862 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 863 if (!sw_params || !params || !sparams) { 864 err = -ENOMEM; 865 goto failure; 866 } 867 868 if (atomic_read(&substream->mmap_count)) 869 direct = 1; 870 else 871 direct = substream->oss.setup.direct; 872 873 _snd_pcm_hw_params_any(sparams); 874 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 875 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 876 snd_mask_none(&mask); 877 if (atomic_read(&substream->mmap_count)) 878 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 879 else { 880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 881 if (!direct) 882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 883 } 884 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 885 if (err < 0) { 886 pcm_dbg(substream->pcm, "No usable accesses\n"); 887 err = -EINVAL; 888 goto failure; 889 } 890 choose_rate(substream, sparams, runtime->oss.rate); 891 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 892 893 format = snd_pcm_oss_format_from(runtime->oss.format); 894 895 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 896 if (direct) 897 sformat = format; 898 else 899 sformat = snd_pcm_plug_slave_format(format, sformat_mask); 900 901 if ((__force int)sformat < 0 || 902 !snd_mask_test(sformat_mask, (__force int)sformat)) { 903 for (sformat = (__force snd_pcm_format_t)0; 904 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 905 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 906 if (snd_mask_test(sformat_mask, (__force int)sformat) && 907 snd_pcm_oss_format_to(sformat) >= 0) 908 break; 909 } 910 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 911 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 912 err = -EINVAL; 913 goto failure; 914 } 915 } 916 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 917 if (err < 0) 918 goto failure; 919 920 if (direct) { 921 memcpy(params, sparams, sizeof(*params)); 922 } else { 923 _snd_pcm_hw_params_any(params); 924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 925 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 926 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 927 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 928 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 929 runtime->oss.channels, 0); 930 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 931 runtime->oss.rate, 0); 932 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 933 params_access(params), params_format(params), 934 params_channels(params), params_rate(params)); 935 } 936 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 937 params_access(sparams), params_format(sparams), 938 params_channels(sparams), params_rate(sparams)); 939 940 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 941 params_channels(params) / 8; 942 943 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 944 snd_pcm_oss_plugin_clear(substream); 945 if (!direct) { 946 /* add necessary plugins */ 947 snd_pcm_oss_plugin_clear(substream); 948 if ((err = snd_pcm_plug_format_plugins(substream, 949 params, 950 sparams)) < 0) { 951 pcm_dbg(substream->pcm, 952 "snd_pcm_plug_format_plugins failed: %i\n", err); 953 snd_pcm_oss_plugin_clear(substream); 954 goto failure; 955 } 956 if (runtime->oss.plugin_first) { 957 struct snd_pcm_plugin *plugin; 958 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 959 pcm_dbg(substream->pcm, 960 "snd_pcm_plugin_build_io failed: %i\n", err); 961 snd_pcm_oss_plugin_clear(substream); 962 goto failure; 963 } 964 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 965 err = snd_pcm_plugin_append(plugin); 966 } else { 967 err = snd_pcm_plugin_insert(plugin); 968 } 969 if (err < 0) { 970 snd_pcm_oss_plugin_clear(substream); 971 goto failure; 972 } 973 } 974 } 975 #endif 976 977 err = snd_pcm_oss_period_size(substream, params, sparams); 978 if (err < 0) 979 goto failure; 980 981 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 982 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 983 if (err < 0) 984 goto failure; 985 986 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 987 runtime->oss.periods, NULL); 988 if (err < 0) 989 goto failure; 990 991 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 992 993 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 994 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 995 goto failure; 996 } 997 998 if (runtime->oss.trigger) { 999 sw_params->start_threshold = 1; 1000 } else { 1001 sw_params->start_threshold = runtime->boundary; 1002 } 1003 if (atomic_read(&substream->mmap_count) || 1004 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1005 sw_params->stop_threshold = runtime->boundary; 1006 else 1007 sw_params->stop_threshold = runtime->buffer_size; 1008 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1009 sw_params->period_step = 1; 1010 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1011 1 : runtime->period_size; 1012 if (atomic_read(&substream->mmap_count) || 1013 substream->oss.setup.nosilence) { 1014 sw_params->silence_threshold = 0; 1015 sw_params->silence_size = 0; 1016 } else { 1017 snd_pcm_uframes_t frames; 1018 frames = runtime->period_size + 16; 1019 if (frames > runtime->buffer_size) 1020 frames = runtime->buffer_size; 1021 sw_params->silence_threshold = frames; 1022 sw_params->silence_size = frames; 1023 } 1024 1025 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1026 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1027 goto failure; 1028 } 1029 1030 runtime->oss.periods = params_periods(sparams); 1031 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1032 if (oss_period_size < 0) { 1033 err = -EINVAL; 1034 goto failure; 1035 } 1036 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1037 if (runtime->oss.plugin_first) { 1038 err = snd_pcm_plug_alloc(substream, oss_period_size); 1039 if (err < 0) 1040 goto failure; 1041 } 1042 #endif 1043 oss_period_size *= oss_frame_size; 1044 1045 oss_buffer_size = oss_period_size * runtime->oss.periods; 1046 if (oss_buffer_size < 0) { 1047 err = -EINVAL; 1048 goto failure; 1049 } 1050 1051 runtime->oss.period_bytes = oss_period_size; 1052 runtime->oss.buffer_bytes = oss_buffer_size; 1053 1054 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1055 runtime->oss.period_bytes, 1056 runtime->oss.buffer_bytes); 1057 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1058 params_period_size(sparams), 1059 params_buffer_size(sparams)); 1060 1061 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1062 runtime->oss.channels = params_channels(params); 1063 runtime->oss.rate = params_rate(params); 1064 1065 vfree(runtime->oss.buffer); 1066 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1067 if (!runtime->oss.buffer) { 1068 err = -ENOMEM; 1069 goto failure; 1070 } 1071 1072 runtime->oss.params = 0; 1073 runtime->oss.prepare = 1; 1074 runtime->oss.buffer_used = 0; 1075 if (runtime->dma_area) 1076 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1077 1078 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1079 1080 err = 0; 1081 failure: 1082 kfree(sw_params); 1083 kfree(params); 1084 kfree(sparams); 1085 return err; 1086 } 1087 1088 /* this one takes the lock by itself */ 1089 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 1090 bool trylock) 1091 { 1092 struct snd_pcm_runtime *runtime = substream->runtime; 1093 int err; 1094 1095 if (trylock) { 1096 if (!(mutex_trylock(&runtime->oss.params_lock))) 1097 return -EAGAIN; 1098 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1099 return -ERESTARTSYS; 1100 1101 err = snd_pcm_oss_change_params_locked(substream); 1102 mutex_unlock(&runtime->oss.params_lock); 1103 return err; 1104 } 1105 1106 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1107 { 1108 int idx, err; 1109 struct snd_pcm_substream *asubstream = NULL, *substream; 1110 1111 for (idx = 0; idx < 2; idx++) { 1112 substream = pcm_oss_file->streams[idx]; 1113 if (substream == NULL) 1114 continue; 1115 if (asubstream == NULL) 1116 asubstream = substream; 1117 if (substream->runtime->oss.params) { 1118 err = snd_pcm_oss_change_params(substream, false); 1119 if (err < 0) 1120 return err; 1121 } 1122 } 1123 if (!asubstream) 1124 return -EIO; 1125 if (r_substream) 1126 *r_substream = asubstream; 1127 return 0; 1128 } 1129 1130 /* call with params_lock held */ 1131 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1132 { 1133 int err; 1134 struct snd_pcm_runtime *runtime = substream->runtime; 1135 1136 if (!runtime->oss.prepare) 1137 return 0; 1138 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1139 if (err < 0) { 1140 pcm_dbg(substream->pcm, 1141 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1142 return err; 1143 } 1144 runtime->oss.prepare = 0; 1145 runtime->oss.prev_hw_ptr_period = 0; 1146 runtime->oss.period_ptr = 0; 1147 runtime->oss.buffer_used = 0; 1148 1149 return 0; 1150 } 1151 1152 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1153 { 1154 struct snd_pcm_runtime *runtime; 1155 int err; 1156 1157 runtime = substream->runtime; 1158 if (runtime->oss.params) { 1159 err = snd_pcm_oss_change_params(substream, false); 1160 if (err < 0) 1161 return err; 1162 } 1163 if (runtime->oss.prepare) { 1164 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1165 return -ERESTARTSYS; 1166 err = snd_pcm_oss_prepare(substream); 1167 mutex_unlock(&runtime->oss.params_lock); 1168 if (err < 0) 1169 return err; 1170 } 1171 return 0; 1172 } 1173 1174 /* call with params_lock held */ 1175 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) 1176 { 1177 struct snd_pcm_runtime *runtime; 1178 int err; 1179 1180 runtime = substream->runtime; 1181 if (runtime->oss.params) { 1182 err = snd_pcm_oss_change_params_locked(substream); 1183 if (err < 0) 1184 return err; 1185 } 1186 if (runtime->oss.prepare) { 1187 err = snd_pcm_oss_prepare(substream); 1188 if (err < 0) 1189 return err; 1190 } 1191 return 0; 1192 } 1193 1194 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1195 { 1196 struct snd_pcm_runtime *runtime; 1197 snd_pcm_uframes_t frames; 1198 int err = 0; 1199 1200 while (1) { 1201 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1202 if (err < 0) 1203 break; 1204 runtime = substream->runtime; 1205 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1206 break; 1207 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1208 /* until avail(delay) <= buffer_size */ 1209 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1210 frames /= runtime->period_size; 1211 frames *= runtime->period_size; 1212 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1213 if (err < 0) 1214 break; 1215 } 1216 return err; 1217 } 1218 1219 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1220 { 1221 struct snd_pcm_runtime *runtime = substream->runtime; 1222 int ret; 1223 while (1) { 1224 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1225 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1226 #ifdef OSS_DEBUG 1227 pcm_dbg(substream->pcm, 1228 "pcm_oss: write: recovering from %s\n", 1229 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1230 "XRUN" : "SUSPEND"); 1231 #endif 1232 ret = snd_pcm_oss_prepare(substream); 1233 if (ret < 0) 1234 break; 1235 } 1236 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1237 frames, in_kernel); 1238 if (ret != -EPIPE && ret != -ESTRPIPE) 1239 break; 1240 /* test, if we can't store new data, because the stream */ 1241 /* has not been started */ 1242 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1243 return -EAGAIN; 1244 } 1245 return ret; 1246 } 1247 1248 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1249 { 1250 struct snd_pcm_runtime *runtime = substream->runtime; 1251 snd_pcm_sframes_t delay; 1252 int ret; 1253 while (1) { 1254 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1255 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1256 #ifdef OSS_DEBUG 1257 pcm_dbg(substream->pcm, 1258 "pcm_oss: read: recovering from %s\n", 1259 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1260 "XRUN" : "SUSPEND"); 1261 #endif 1262 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1263 if (ret < 0) 1264 break; 1265 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1266 ret = snd_pcm_oss_prepare(substream); 1267 if (ret < 0) 1268 break; 1269 } 1270 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1271 if (ret < 0) 1272 break; 1273 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1274 frames, in_kernel); 1275 if (ret == -EPIPE) { 1276 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1277 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1278 if (ret < 0) 1279 break; 1280 } 1281 continue; 1282 } 1283 if (ret != -ESTRPIPE) 1284 break; 1285 } 1286 return ret; 1287 } 1288 1289 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1290 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1291 { 1292 struct snd_pcm_runtime *runtime = substream->runtime; 1293 int ret; 1294 while (1) { 1295 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1296 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1297 #ifdef OSS_DEBUG 1298 pcm_dbg(substream->pcm, 1299 "pcm_oss: writev: recovering from %s\n", 1300 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1301 "XRUN" : "SUSPEND"); 1302 #endif 1303 ret = snd_pcm_oss_prepare(substream); 1304 if (ret < 0) 1305 break; 1306 } 1307 ret = snd_pcm_kernel_writev(substream, bufs, frames); 1308 if (ret != -EPIPE && ret != -ESTRPIPE) 1309 break; 1310 1311 /* test, if we can't store new data, because the stream */ 1312 /* has not been started */ 1313 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1314 return -EAGAIN; 1315 } 1316 return ret; 1317 } 1318 1319 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1320 { 1321 struct snd_pcm_runtime *runtime = substream->runtime; 1322 int ret; 1323 while (1) { 1324 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1325 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1326 #ifdef OSS_DEBUG 1327 pcm_dbg(substream->pcm, 1328 "pcm_oss: readv: recovering from %s\n", 1329 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1330 "XRUN" : "SUSPEND"); 1331 #endif 1332 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1333 if (ret < 0) 1334 break; 1335 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1336 ret = snd_pcm_oss_prepare(substream); 1337 if (ret < 0) 1338 break; 1339 } 1340 ret = snd_pcm_kernel_readv(substream, bufs, frames); 1341 if (ret != -EPIPE && ret != -ESTRPIPE) 1342 break; 1343 } 1344 return ret; 1345 } 1346 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 1347 1348 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1349 { 1350 struct snd_pcm_runtime *runtime = substream->runtime; 1351 snd_pcm_sframes_t frames, frames1; 1352 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1353 if (runtime->oss.plugin_first) { 1354 struct snd_pcm_plugin_channel *channels; 1355 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1356 if (!in_kernel) { 1357 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1358 return -EFAULT; 1359 buf = runtime->oss.buffer; 1360 } 1361 frames = bytes / oss_frame_bytes; 1362 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1363 if (frames1 < 0) 1364 return frames1; 1365 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1366 if (frames1 <= 0) 1367 return frames1; 1368 bytes = frames1 * oss_frame_bytes; 1369 } else 1370 #endif 1371 { 1372 frames = bytes_to_frames(runtime, bytes); 1373 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1374 if (frames1 <= 0) 1375 return frames1; 1376 bytes = frames_to_bytes(runtime, frames1); 1377 } 1378 return bytes; 1379 } 1380 1381 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1382 { 1383 size_t xfer = 0; 1384 ssize_t tmp = 0; 1385 struct snd_pcm_runtime *runtime = substream->runtime; 1386 1387 if (atomic_read(&substream->mmap_count)) 1388 return -ENXIO; 1389 1390 atomic_inc(&runtime->oss.rw_ref); 1391 while (bytes > 0) { 1392 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1393 tmp = -ERESTARTSYS; 1394 break; 1395 } 1396 tmp = snd_pcm_oss_make_ready_locked(substream); 1397 if (tmp < 0) 1398 goto err; 1399 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1400 tmp = bytes; 1401 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1402 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1403 if (tmp > 0) { 1404 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1405 tmp = -EFAULT; 1406 goto err; 1407 } 1408 } 1409 runtime->oss.buffer_used += tmp; 1410 buf += tmp; 1411 bytes -= tmp; 1412 xfer += tmp; 1413 if (substream->oss.setup.partialfrag || 1414 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1415 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1416 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1417 if (tmp <= 0) 1418 goto err; 1419 runtime->oss.bytes += tmp; 1420 runtime->oss.period_ptr += tmp; 1421 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1422 if (runtime->oss.period_ptr == 0 || 1423 runtime->oss.period_ptr == runtime->oss.buffer_used) 1424 runtime->oss.buffer_used = 0; 1425 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1426 tmp = -EAGAIN; 1427 goto err; 1428 } 1429 } 1430 } else { 1431 tmp = snd_pcm_oss_write2(substream, 1432 (const char __force *)buf, 1433 runtime->oss.period_bytes, 0); 1434 if (tmp <= 0) 1435 goto err; 1436 runtime->oss.bytes += tmp; 1437 buf += tmp; 1438 bytes -= tmp; 1439 xfer += tmp; 1440 if ((substream->f_flags & O_NONBLOCK) != 0 && 1441 tmp != runtime->oss.period_bytes) 1442 tmp = -EAGAIN; 1443 } 1444 err: 1445 mutex_unlock(&runtime->oss.params_lock); 1446 if (tmp < 0) 1447 break; 1448 if (signal_pending(current)) { 1449 tmp = -ERESTARTSYS; 1450 break; 1451 } 1452 tmp = 0; 1453 } 1454 atomic_dec(&runtime->oss.rw_ref); 1455 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1456 } 1457 1458 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1459 { 1460 struct snd_pcm_runtime *runtime = substream->runtime; 1461 snd_pcm_sframes_t frames, frames1; 1462 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1463 char __user *final_dst = (char __force __user *)buf; 1464 if (runtime->oss.plugin_first) { 1465 struct snd_pcm_plugin_channel *channels; 1466 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1467 if (!in_kernel) 1468 buf = runtime->oss.buffer; 1469 frames = bytes / oss_frame_bytes; 1470 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1471 if (frames1 < 0) 1472 return frames1; 1473 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1474 if (frames1 <= 0) 1475 return frames1; 1476 bytes = frames1 * oss_frame_bytes; 1477 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1478 return -EFAULT; 1479 } else 1480 #endif 1481 { 1482 frames = bytes_to_frames(runtime, bytes); 1483 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1484 if (frames1 <= 0) 1485 return frames1; 1486 bytes = frames_to_bytes(runtime, frames1); 1487 } 1488 return bytes; 1489 } 1490 1491 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1492 { 1493 size_t xfer = 0; 1494 ssize_t tmp = 0; 1495 struct snd_pcm_runtime *runtime = substream->runtime; 1496 1497 if (atomic_read(&substream->mmap_count)) 1498 return -ENXIO; 1499 1500 atomic_inc(&runtime->oss.rw_ref); 1501 while (bytes > 0) { 1502 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1503 tmp = -ERESTARTSYS; 1504 break; 1505 } 1506 tmp = snd_pcm_oss_make_ready_locked(substream); 1507 if (tmp < 0) 1508 goto err; 1509 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1510 if (runtime->oss.buffer_used == 0) { 1511 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1512 if (tmp <= 0) 1513 goto err; 1514 runtime->oss.bytes += tmp; 1515 runtime->oss.period_ptr = tmp; 1516 runtime->oss.buffer_used = tmp; 1517 } 1518 tmp = bytes; 1519 if ((size_t) tmp > runtime->oss.buffer_used) 1520 tmp = runtime->oss.buffer_used; 1521 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1522 tmp = -EFAULT; 1523 goto err; 1524 } 1525 buf += tmp; 1526 bytes -= tmp; 1527 xfer += tmp; 1528 runtime->oss.buffer_used -= tmp; 1529 } else { 1530 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1531 runtime->oss.period_bytes, 0); 1532 if (tmp <= 0) 1533 goto err; 1534 runtime->oss.bytes += tmp; 1535 buf += tmp; 1536 bytes -= tmp; 1537 xfer += tmp; 1538 } 1539 err: 1540 mutex_unlock(&runtime->oss.params_lock); 1541 if (tmp < 0) 1542 break; 1543 if (signal_pending(current)) { 1544 tmp = -ERESTARTSYS; 1545 break; 1546 } 1547 tmp = 0; 1548 } 1549 atomic_dec(&runtime->oss.rw_ref); 1550 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1551 } 1552 1553 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1554 { 1555 struct snd_pcm_substream *substream; 1556 struct snd_pcm_runtime *runtime; 1557 int i; 1558 1559 for (i = 0; i < 2; i++) { 1560 substream = pcm_oss_file->streams[i]; 1561 if (!substream) 1562 continue; 1563 runtime = substream->runtime; 1564 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1565 mutex_lock(&runtime->oss.params_lock); 1566 runtime->oss.prepare = 1; 1567 runtime->oss.buffer_used = 0; 1568 runtime->oss.prev_hw_ptr_period = 0; 1569 runtime->oss.period_ptr = 0; 1570 mutex_unlock(&runtime->oss.params_lock); 1571 } 1572 return 0; 1573 } 1574 1575 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1576 { 1577 struct snd_pcm_substream *substream; 1578 int err; 1579 1580 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1581 if (substream != NULL) { 1582 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1583 return err; 1584 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1585 } 1586 /* note: all errors from the start action are ignored */ 1587 /* OSS apps do not know, how to handle them */ 1588 return 0; 1589 } 1590 1591 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1592 { 1593 struct snd_pcm_runtime *runtime; 1594 ssize_t result = 0; 1595 snd_pcm_state_t state; 1596 long res; 1597 wait_queue_entry_t wait; 1598 1599 runtime = substream->runtime; 1600 init_waitqueue_entry(&wait, current); 1601 add_wait_queue(&runtime->sleep, &wait); 1602 #ifdef OSS_DEBUG 1603 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1604 #endif 1605 while (1) { 1606 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1607 if (result > 0) { 1608 runtime->oss.buffer_used = 0; 1609 result = 0; 1610 break; 1611 } 1612 if (result != 0 && result != -EAGAIN) 1613 break; 1614 result = 0; 1615 set_current_state(TASK_INTERRUPTIBLE); 1616 snd_pcm_stream_lock_irq(substream); 1617 state = runtime->status->state; 1618 snd_pcm_stream_unlock_irq(substream); 1619 if (state != SNDRV_PCM_STATE_RUNNING) { 1620 set_current_state(TASK_RUNNING); 1621 break; 1622 } 1623 res = schedule_timeout(10 * HZ); 1624 if (signal_pending(current)) { 1625 result = -ERESTARTSYS; 1626 break; 1627 } 1628 if (res == 0) { 1629 pcm_err(substream->pcm, 1630 "OSS sync error - DMA timeout\n"); 1631 result = -EIO; 1632 break; 1633 } 1634 } 1635 remove_wait_queue(&runtime->sleep, &wait); 1636 return result; 1637 } 1638 1639 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1640 { 1641 int err = 0; 1642 unsigned int saved_f_flags; 1643 struct snd_pcm_substream *substream; 1644 struct snd_pcm_runtime *runtime; 1645 snd_pcm_format_t format; 1646 unsigned long width; 1647 size_t size; 1648 1649 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1650 if (substream != NULL) { 1651 runtime = substream->runtime; 1652 if (atomic_read(&substream->mmap_count)) 1653 goto __direct; 1654 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1655 return err; 1656 atomic_inc(&runtime->oss.rw_ref); 1657 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1658 atomic_dec(&runtime->oss.rw_ref); 1659 return -ERESTARTSYS; 1660 } 1661 format = snd_pcm_oss_format_from(runtime->oss.format); 1662 width = snd_pcm_format_physical_width(format); 1663 if (runtime->oss.buffer_used > 0) { 1664 #ifdef OSS_DEBUG 1665 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1666 #endif 1667 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1668 snd_pcm_format_set_silence(format, 1669 runtime->oss.buffer + runtime->oss.buffer_used, 1670 size); 1671 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1672 if (err < 0) 1673 goto unlock; 1674 } else if (runtime->oss.period_ptr > 0) { 1675 #ifdef OSS_DEBUG 1676 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1677 #endif 1678 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1679 snd_pcm_format_set_silence(format, 1680 runtime->oss.buffer, 1681 size * 8 / width); 1682 err = snd_pcm_oss_sync1(substream, size); 1683 if (err < 0) 1684 goto unlock; 1685 } 1686 /* 1687 * The ALSA's period might be a bit large than OSS one. 1688 * Fill the remain portion of ALSA period with zeros. 1689 */ 1690 size = runtime->control->appl_ptr % runtime->period_size; 1691 if (size > 0) { 1692 size = runtime->period_size - size; 1693 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) 1694 snd_pcm_lib_write(substream, NULL, size); 1695 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 1696 snd_pcm_lib_writev(substream, NULL, size); 1697 } 1698 unlock: 1699 mutex_unlock(&runtime->oss.params_lock); 1700 atomic_dec(&runtime->oss.rw_ref); 1701 if (err < 0) 1702 return err; 1703 /* 1704 * finish sync: drain the buffer 1705 */ 1706 __direct: 1707 saved_f_flags = substream->f_flags; 1708 substream->f_flags &= ~O_NONBLOCK; 1709 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1710 substream->f_flags = saved_f_flags; 1711 if (err < 0) 1712 return err; 1713 mutex_lock(&runtime->oss.params_lock); 1714 runtime->oss.prepare = 1; 1715 mutex_unlock(&runtime->oss.params_lock); 1716 } 1717 1718 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1719 if (substream != NULL) { 1720 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1721 return err; 1722 runtime = substream->runtime; 1723 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1724 if (err < 0) 1725 return err; 1726 mutex_lock(&runtime->oss.params_lock); 1727 runtime->oss.buffer_used = 0; 1728 runtime->oss.prepare = 1; 1729 mutex_unlock(&runtime->oss.params_lock); 1730 } 1731 return 0; 1732 } 1733 1734 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1735 { 1736 int idx; 1737 1738 for (idx = 1; idx >= 0; --idx) { 1739 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1740 struct snd_pcm_runtime *runtime; 1741 int err; 1742 1743 if (substream == NULL) 1744 continue; 1745 runtime = substream->runtime; 1746 if (rate < 1000) 1747 rate = 1000; 1748 else if (rate > 192000) 1749 rate = 192000; 1750 err = lock_params(runtime); 1751 if (err < 0) 1752 return err; 1753 if (runtime->oss.rate != rate) { 1754 runtime->oss.params = 1; 1755 runtime->oss.rate = rate; 1756 } 1757 unlock_params(runtime); 1758 } 1759 return snd_pcm_oss_get_rate(pcm_oss_file); 1760 } 1761 1762 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1763 { 1764 struct snd_pcm_substream *substream; 1765 int err; 1766 1767 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1768 return err; 1769 return substream->runtime->oss.rate; 1770 } 1771 1772 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1773 { 1774 int idx; 1775 if (channels < 1) 1776 channels = 1; 1777 if (channels > 128) 1778 return -EINVAL; 1779 for (idx = 1; idx >= 0; --idx) { 1780 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1781 struct snd_pcm_runtime *runtime; 1782 int err; 1783 1784 if (substream == NULL) 1785 continue; 1786 runtime = substream->runtime; 1787 err = lock_params(runtime); 1788 if (err < 0) 1789 return err; 1790 if (runtime->oss.channels != channels) { 1791 runtime->oss.params = 1; 1792 runtime->oss.channels = channels; 1793 } 1794 unlock_params(runtime); 1795 } 1796 return snd_pcm_oss_get_channels(pcm_oss_file); 1797 } 1798 1799 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1800 { 1801 struct snd_pcm_substream *substream; 1802 int err; 1803 1804 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1805 return err; 1806 return substream->runtime->oss.channels; 1807 } 1808 1809 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1810 { 1811 struct snd_pcm_substream *substream; 1812 int err; 1813 1814 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1815 return err; 1816 return substream->runtime->oss.period_bytes; 1817 } 1818 1819 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1820 { 1821 struct snd_pcm_substream *substream; 1822 int err; 1823 int direct; 1824 struct snd_pcm_hw_params *params; 1825 unsigned int formats = 0; 1826 const struct snd_mask *format_mask; 1827 int fmt; 1828 1829 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1830 return err; 1831 if (atomic_read(&substream->mmap_count)) 1832 direct = 1; 1833 else 1834 direct = substream->oss.setup.direct; 1835 if (!direct) 1836 return AFMT_MU_LAW | AFMT_U8 | 1837 AFMT_S16_LE | AFMT_S16_BE | 1838 AFMT_S8 | AFMT_U16_LE | 1839 AFMT_U16_BE | 1840 AFMT_S32_LE | AFMT_S32_BE | 1841 AFMT_S24_LE | AFMT_S24_BE | 1842 AFMT_S24_PACKED; 1843 params = kmalloc(sizeof(*params), GFP_KERNEL); 1844 if (!params) 1845 return -ENOMEM; 1846 _snd_pcm_hw_params_any(params); 1847 err = snd_pcm_hw_refine(substream, params); 1848 if (err < 0) 1849 goto error; 1850 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); 1851 for (fmt = 0; fmt < 32; ++fmt) { 1852 if (snd_mask_test(format_mask, fmt)) { 1853 int f = snd_pcm_oss_format_to(fmt); 1854 if (f >= 0) 1855 formats |= f; 1856 } 1857 } 1858 1859 error: 1860 kfree(params); 1861 return err < 0 ? err : formats; 1862 } 1863 1864 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1865 { 1866 int formats, idx; 1867 int err; 1868 1869 if (format != AFMT_QUERY) { 1870 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1871 if (formats < 0) 1872 return formats; 1873 if (!(formats & format)) 1874 format = AFMT_U8; 1875 for (idx = 1; idx >= 0; --idx) { 1876 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1877 struct snd_pcm_runtime *runtime; 1878 if (substream == NULL) 1879 continue; 1880 runtime = substream->runtime; 1881 err = lock_params(runtime); 1882 if (err < 0) 1883 return err; 1884 if (runtime->oss.format != format) { 1885 runtime->oss.params = 1; 1886 runtime->oss.format = format; 1887 } 1888 unlock_params(runtime); 1889 } 1890 } 1891 return snd_pcm_oss_get_format(pcm_oss_file); 1892 } 1893 1894 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1895 { 1896 struct snd_pcm_substream *substream; 1897 int err; 1898 1899 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1900 return err; 1901 return substream->runtime->oss.format; 1902 } 1903 1904 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1905 { 1906 struct snd_pcm_runtime *runtime; 1907 1908 runtime = substream->runtime; 1909 if (subdivide == 0) { 1910 subdivide = runtime->oss.subdivision; 1911 if (subdivide == 0) 1912 subdivide = 1; 1913 return subdivide; 1914 } 1915 if (runtime->oss.subdivision || runtime->oss.fragshift) 1916 return -EINVAL; 1917 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1918 subdivide != 8 && subdivide != 16) 1919 return -EINVAL; 1920 runtime->oss.subdivision = subdivide; 1921 runtime->oss.params = 1; 1922 return subdivide; 1923 } 1924 1925 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1926 { 1927 int err = -EINVAL, idx; 1928 1929 for (idx = 1; idx >= 0; --idx) { 1930 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1931 struct snd_pcm_runtime *runtime; 1932 1933 if (substream == NULL) 1934 continue; 1935 runtime = substream->runtime; 1936 err = lock_params(runtime); 1937 if (err < 0) 1938 return err; 1939 err = snd_pcm_oss_set_subdivide1(substream, subdivide); 1940 unlock_params(runtime); 1941 if (err < 0) 1942 return err; 1943 } 1944 return err; 1945 } 1946 1947 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1948 { 1949 struct snd_pcm_runtime *runtime; 1950 1951 runtime = substream->runtime; 1952 if (runtime->oss.subdivision || runtime->oss.fragshift) 1953 return -EINVAL; 1954 runtime->oss.fragshift = val & 0xffff; 1955 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1956 if (runtime->oss.fragshift < 4) /* < 16 */ 1957 runtime->oss.fragshift = 4; 1958 if (runtime->oss.maxfrags < 2) 1959 runtime->oss.maxfrags = 2; 1960 runtime->oss.params = 1; 1961 return 0; 1962 } 1963 1964 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1965 { 1966 int err = -EINVAL, idx; 1967 1968 for (idx = 1; idx >= 0; --idx) { 1969 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1970 struct snd_pcm_runtime *runtime; 1971 1972 if (substream == NULL) 1973 continue; 1974 runtime = substream->runtime; 1975 err = lock_params(runtime); 1976 if (err < 0) 1977 return err; 1978 err = snd_pcm_oss_set_fragment1(substream, val); 1979 unlock_params(runtime); 1980 if (err < 0) 1981 return err; 1982 } 1983 return err; 1984 } 1985 1986 static int snd_pcm_oss_nonblock(struct file * file) 1987 { 1988 spin_lock(&file->f_lock); 1989 file->f_flags |= O_NONBLOCK; 1990 spin_unlock(&file->f_lock); 1991 return 0; 1992 } 1993 1994 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1995 { 1996 1997 if (substream == NULL) { 1998 res &= ~DSP_CAP_DUPLEX; 1999 return res; 2000 } 2001 #ifdef DSP_CAP_MULTI 2002 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2003 if (substream->pstr->substream_count > 1) 2004 res |= DSP_CAP_MULTI; 2005 #endif 2006 /* DSP_CAP_REALTIME is set all times: */ 2007 /* all ALSA drivers can return actual pointer in ring buffer */ 2008 #if defined(DSP_CAP_REALTIME) && 0 2009 { 2010 struct snd_pcm_runtime *runtime = substream->runtime; 2011 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 2012 res &= ~DSP_CAP_REALTIME; 2013 } 2014 #endif 2015 return res; 2016 } 2017 2018 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 2019 { 2020 int result, idx; 2021 2022 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 2023 for (idx = 0; idx < 2; idx++) { 2024 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 2025 result = snd_pcm_oss_get_caps1(substream, result); 2026 } 2027 result |= 0x0001; /* revision - same as SB AWE 64 */ 2028 return result; 2029 } 2030 2031 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 2032 snd_pcm_uframes_t hw_ptr) 2033 { 2034 struct snd_pcm_runtime *runtime = substream->runtime; 2035 snd_pcm_uframes_t appl_ptr; 2036 appl_ptr = hw_ptr + runtime->buffer_size; 2037 appl_ptr %= runtime->boundary; 2038 runtime->control->appl_ptr = appl_ptr; 2039 } 2040 2041 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 2042 { 2043 struct snd_pcm_runtime *runtime; 2044 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2045 int err, cmd; 2046 2047 #ifdef OSS_DEBUG 2048 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 2049 #endif 2050 2051 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2052 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2053 2054 if (psubstream) { 2055 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 2056 return err; 2057 } 2058 if (csubstream) { 2059 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 2060 return err; 2061 } 2062 if (psubstream) { 2063 runtime = psubstream->runtime; 2064 cmd = 0; 2065 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2066 return -ERESTARTSYS; 2067 if (trigger & PCM_ENABLE_OUTPUT) { 2068 if (runtime->oss.trigger) 2069 goto _skip1; 2070 if (atomic_read(&psubstream->mmap_count)) 2071 snd_pcm_oss_simulate_fill(psubstream, 2072 get_hw_ptr_period(runtime)); 2073 runtime->oss.trigger = 1; 2074 runtime->start_threshold = 1; 2075 cmd = SNDRV_PCM_IOCTL_START; 2076 } else { 2077 if (!runtime->oss.trigger) 2078 goto _skip1; 2079 runtime->oss.trigger = 0; 2080 runtime->start_threshold = runtime->boundary; 2081 cmd = SNDRV_PCM_IOCTL_DROP; 2082 runtime->oss.prepare = 1; 2083 } 2084 _skip1: 2085 mutex_unlock(&runtime->oss.params_lock); 2086 if (cmd) { 2087 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2088 if (err < 0) 2089 return err; 2090 } 2091 } 2092 if (csubstream) { 2093 runtime = csubstream->runtime; 2094 cmd = 0; 2095 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2096 return -ERESTARTSYS; 2097 if (trigger & PCM_ENABLE_INPUT) { 2098 if (runtime->oss.trigger) 2099 goto _skip2; 2100 runtime->oss.trigger = 1; 2101 runtime->start_threshold = 1; 2102 cmd = SNDRV_PCM_IOCTL_START; 2103 } else { 2104 if (!runtime->oss.trigger) 2105 goto _skip2; 2106 runtime->oss.trigger = 0; 2107 runtime->start_threshold = runtime->boundary; 2108 cmd = SNDRV_PCM_IOCTL_DROP; 2109 runtime->oss.prepare = 1; 2110 } 2111 _skip2: 2112 mutex_unlock(&runtime->oss.params_lock); 2113 if (cmd) { 2114 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2115 if (err < 0) 2116 return err; 2117 } 2118 } 2119 return 0; 2120 } 2121 2122 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2123 { 2124 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2125 int result = 0; 2126 2127 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2128 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2129 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2130 result |= PCM_ENABLE_OUTPUT; 2131 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2132 result |= PCM_ENABLE_INPUT; 2133 return result; 2134 } 2135 2136 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2137 { 2138 struct snd_pcm_substream *substream; 2139 struct snd_pcm_runtime *runtime; 2140 snd_pcm_sframes_t delay; 2141 int err; 2142 2143 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2144 if (substream == NULL) 2145 return -EINVAL; 2146 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2147 return err; 2148 runtime = substream->runtime; 2149 if (runtime->oss.params || runtime->oss.prepare) 2150 return 0; 2151 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2152 if (err == -EPIPE) 2153 delay = 0; /* hack for broken OSS applications */ 2154 else if (err < 0) 2155 return err; 2156 return snd_pcm_oss_bytes(substream, delay); 2157 } 2158 2159 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2160 { 2161 struct snd_pcm_substream *substream; 2162 struct snd_pcm_runtime *runtime; 2163 snd_pcm_sframes_t delay; 2164 int fixup; 2165 struct count_info info; 2166 int err; 2167 2168 if (_info == NULL) 2169 return -EFAULT; 2170 substream = pcm_oss_file->streams[stream]; 2171 if (substream == NULL) 2172 return -EINVAL; 2173 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2174 return err; 2175 runtime = substream->runtime; 2176 if (runtime->oss.params || runtime->oss.prepare) { 2177 memset(&info, 0, sizeof(info)); 2178 if (copy_to_user(_info, &info, sizeof(info))) 2179 return -EFAULT; 2180 return 0; 2181 } 2182 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2183 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2184 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2185 err = 0; 2186 delay = 0; 2187 fixup = 0; 2188 } else { 2189 fixup = runtime->oss.buffer_used; 2190 } 2191 } else { 2192 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2193 fixup = -runtime->oss.buffer_used; 2194 } 2195 if (err < 0) 2196 return err; 2197 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2198 if (atomic_read(&substream->mmap_count)) { 2199 snd_pcm_sframes_t n; 2200 delay = get_hw_ptr_period(runtime); 2201 n = delay - runtime->oss.prev_hw_ptr_period; 2202 if (n < 0) 2203 n += runtime->boundary; 2204 info.blocks = n / runtime->period_size; 2205 runtime->oss.prev_hw_ptr_period = delay; 2206 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2207 snd_pcm_oss_simulate_fill(substream, delay); 2208 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2209 } else { 2210 delay = snd_pcm_oss_bytes(substream, delay); 2211 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2212 if (substream->oss.setup.buggyptr) 2213 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2214 else 2215 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2216 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2217 } else { 2218 delay += fixup; 2219 info.blocks = delay / runtime->oss.period_bytes; 2220 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2221 } 2222 } 2223 if (copy_to_user(_info, &info, sizeof(info))) 2224 return -EFAULT; 2225 return 0; 2226 } 2227 2228 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2229 { 2230 struct snd_pcm_substream *substream; 2231 struct snd_pcm_runtime *runtime; 2232 snd_pcm_sframes_t avail; 2233 int fixup; 2234 struct audio_buf_info info; 2235 int err; 2236 2237 if (_info == NULL) 2238 return -EFAULT; 2239 substream = pcm_oss_file->streams[stream]; 2240 if (substream == NULL) 2241 return -EINVAL; 2242 runtime = substream->runtime; 2243 2244 if (runtime->oss.params && 2245 (err = snd_pcm_oss_change_params(substream, false)) < 0) 2246 return err; 2247 2248 info.fragsize = runtime->oss.period_bytes; 2249 info.fragstotal = runtime->periods; 2250 if (runtime->oss.prepare) { 2251 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2252 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2253 info.fragments = runtime->oss.periods; 2254 } else { 2255 info.bytes = 0; 2256 info.fragments = 0; 2257 } 2258 } else { 2259 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2260 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2261 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2262 avail = runtime->buffer_size; 2263 err = 0; 2264 fixup = 0; 2265 } else { 2266 avail = runtime->buffer_size - avail; 2267 fixup = -runtime->oss.buffer_used; 2268 } 2269 } else { 2270 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2271 fixup = runtime->oss.buffer_used; 2272 } 2273 if (err < 0) 2274 return err; 2275 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2276 info.fragments = info.bytes / runtime->oss.period_bytes; 2277 } 2278 2279 #ifdef OSS_DEBUG 2280 pcm_dbg(substream->pcm, 2281 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2282 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2283 #endif 2284 if (copy_to_user(_info, &info, sizeof(info))) 2285 return -EFAULT; 2286 return 0; 2287 } 2288 2289 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2290 { 2291 // it won't be probably implemented 2292 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2293 return -EINVAL; 2294 } 2295 2296 static const char *strip_task_path(const char *path) 2297 { 2298 const char *ptr, *ptrl = NULL; 2299 for (ptr = path; *ptr; ptr++) { 2300 if (*ptr == '/') 2301 ptrl = ptr + 1; 2302 } 2303 return ptrl; 2304 } 2305 2306 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2307 const char *task_name, 2308 struct snd_pcm_oss_setup *rsetup) 2309 { 2310 struct snd_pcm_oss_setup *setup; 2311 2312 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2313 do { 2314 for (setup = pcm->streams[stream].oss.setup_list; setup; 2315 setup = setup->next) { 2316 if (!strcmp(setup->task_name, task_name)) 2317 goto out; 2318 } 2319 } while ((task_name = strip_task_path(task_name)) != NULL); 2320 out: 2321 if (setup) 2322 *rsetup = *setup; 2323 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2324 } 2325 2326 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2327 { 2328 struct snd_pcm_runtime *runtime; 2329 runtime = substream->runtime; 2330 vfree(runtime->oss.buffer); 2331 runtime->oss.buffer = NULL; 2332 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2333 snd_pcm_oss_plugin_clear(substream); 2334 #endif 2335 substream->oss.oss = 0; 2336 } 2337 2338 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2339 struct snd_pcm_oss_setup *setup, 2340 int minor) 2341 { 2342 struct snd_pcm_runtime *runtime; 2343 2344 substream->oss.oss = 1; 2345 substream->oss.setup = *setup; 2346 if (setup->nonblock) 2347 substream->f_flags |= O_NONBLOCK; 2348 else if (setup->block) 2349 substream->f_flags &= ~O_NONBLOCK; 2350 runtime = substream->runtime; 2351 runtime->oss.params = 1; 2352 runtime->oss.trigger = 1; 2353 runtime->oss.rate = 8000; 2354 mutex_init(&runtime->oss.params_lock); 2355 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2356 case SNDRV_MINOR_OSS_PCM_8: 2357 runtime->oss.format = AFMT_U8; 2358 break; 2359 case SNDRV_MINOR_OSS_PCM_16: 2360 runtime->oss.format = AFMT_S16_LE; 2361 break; 2362 default: 2363 runtime->oss.format = AFMT_MU_LAW; 2364 } 2365 runtime->oss.channels = 1; 2366 runtime->oss.fragshift = 0; 2367 runtime->oss.maxfrags = 0; 2368 runtime->oss.subdivision = 0; 2369 substream->pcm_release = snd_pcm_oss_release_substream; 2370 atomic_set(&runtime->oss.rw_ref, 0); 2371 } 2372 2373 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2374 { 2375 int cidx; 2376 if (!pcm_oss_file) 2377 return 0; 2378 for (cidx = 0; cidx < 2; ++cidx) { 2379 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2380 if (substream) 2381 snd_pcm_release_substream(substream); 2382 } 2383 kfree(pcm_oss_file); 2384 return 0; 2385 } 2386 2387 static int snd_pcm_oss_open_file(struct file *file, 2388 struct snd_pcm *pcm, 2389 struct snd_pcm_oss_file **rpcm_oss_file, 2390 int minor, 2391 struct snd_pcm_oss_setup *setup) 2392 { 2393 int idx, err; 2394 struct snd_pcm_oss_file *pcm_oss_file; 2395 struct snd_pcm_substream *substream; 2396 fmode_t f_mode = file->f_mode; 2397 2398 if (rpcm_oss_file) 2399 *rpcm_oss_file = NULL; 2400 2401 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2402 if (pcm_oss_file == NULL) 2403 return -ENOMEM; 2404 2405 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2406 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2407 f_mode = FMODE_WRITE; 2408 2409 file->f_flags &= ~O_APPEND; 2410 for (idx = 0; idx < 2; idx++) { 2411 if (setup[idx].disable) 2412 continue; 2413 if (! pcm->streams[idx].substream_count) 2414 continue; /* no matching substream */ 2415 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2416 if (! (f_mode & FMODE_WRITE)) 2417 continue; 2418 } else { 2419 if (! (f_mode & FMODE_READ)) 2420 continue; 2421 } 2422 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2423 if (err < 0) { 2424 snd_pcm_oss_release_file(pcm_oss_file); 2425 return err; 2426 } 2427 2428 pcm_oss_file->streams[idx] = substream; 2429 substream->file = pcm_oss_file; 2430 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2431 } 2432 2433 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2434 snd_pcm_oss_release_file(pcm_oss_file); 2435 return -EINVAL; 2436 } 2437 2438 file->private_data = pcm_oss_file; 2439 if (rpcm_oss_file) 2440 *rpcm_oss_file = pcm_oss_file; 2441 return 0; 2442 } 2443 2444 2445 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2446 { 2447 unsigned int idx; 2448 2449 if (snd_BUG_ON(!task || !name || size < 2)) 2450 return -EINVAL; 2451 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2452 name[idx] = task->comm[idx]; 2453 name[idx] = '\0'; 2454 return 0; 2455 } 2456 2457 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2458 { 2459 int err; 2460 char task_name[32]; 2461 struct snd_pcm *pcm; 2462 struct snd_pcm_oss_file *pcm_oss_file; 2463 struct snd_pcm_oss_setup setup[2]; 2464 int nonblock; 2465 wait_queue_entry_t wait; 2466 2467 err = nonseekable_open(inode, file); 2468 if (err < 0) 2469 return err; 2470 2471 pcm = snd_lookup_oss_minor_data(iminor(inode), 2472 SNDRV_OSS_DEVICE_TYPE_PCM); 2473 if (pcm == NULL) { 2474 err = -ENODEV; 2475 goto __error1; 2476 } 2477 err = snd_card_file_add(pcm->card, file); 2478 if (err < 0) 2479 goto __error1; 2480 if (!try_module_get(pcm->card->module)) { 2481 err = -EFAULT; 2482 goto __error2; 2483 } 2484 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2485 err = -EFAULT; 2486 goto __error; 2487 } 2488 memset(setup, 0, sizeof(setup)); 2489 if (file->f_mode & FMODE_WRITE) 2490 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2491 task_name, &setup[0]); 2492 if (file->f_mode & FMODE_READ) 2493 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2494 task_name, &setup[1]); 2495 2496 nonblock = !!(file->f_flags & O_NONBLOCK); 2497 if (!nonblock) 2498 nonblock = nonblock_open; 2499 2500 init_waitqueue_entry(&wait, current); 2501 add_wait_queue(&pcm->open_wait, &wait); 2502 mutex_lock(&pcm->open_mutex); 2503 while (1) { 2504 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2505 iminor(inode), setup); 2506 if (err >= 0) 2507 break; 2508 if (err == -EAGAIN) { 2509 if (nonblock) { 2510 err = -EBUSY; 2511 break; 2512 } 2513 } else 2514 break; 2515 set_current_state(TASK_INTERRUPTIBLE); 2516 mutex_unlock(&pcm->open_mutex); 2517 schedule(); 2518 mutex_lock(&pcm->open_mutex); 2519 if (pcm->card->shutdown) { 2520 err = -ENODEV; 2521 break; 2522 } 2523 if (signal_pending(current)) { 2524 err = -ERESTARTSYS; 2525 break; 2526 } 2527 } 2528 remove_wait_queue(&pcm->open_wait, &wait); 2529 mutex_unlock(&pcm->open_mutex); 2530 if (err < 0) 2531 goto __error; 2532 snd_card_unref(pcm->card); 2533 return err; 2534 2535 __error: 2536 module_put(pcm->card->module); 2537 __error2: 2538 snd_card_file_remove(pcm->card, file); 2539 __error1: 2540 if (pcm) 2541 snd_card_unref(pcm->card); 2542 return err; 2543 } 2544 2545 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2546 { 2547 struct snd_pcm *pcm; 2548 struct snd_pcm_substream *substream; 2549 struct snd_pcm_oss_file *pcm_oss_file; 2550 2551 pcm_oss_file = file->private_data; 2552 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2553 if (substream == NULL) 2554 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2555 if (snd_BUG_ON(!substream)) 2556 return -ENXIO; 2557 pcm = substream->pcm; 2558 if (!pcm->card->shutdown) 2559 snd_pcm_oss_sync(pcm_oss_file); 2560 mutex_lock(&pcm->open_mutex); 2561 snd_pcm_oss_release_file(pcm_oss_file); 2562 mutex_unlock(&pcm->open_mutex); 2563 wake_up(&pcm->open_wait); 2564 module_put(pcm->card->module); 2565 snd_card_file_remove(pcm->card, file); 2566 return 0; 2567 } 2568 2569 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2570 { 2571 struct snd_pcm_oss_file *pcm_oss_file; 2572 int __user *p = (int __user *)arg; 2573 int res; 2574 2575 pcm_oss_file = file->private_data; 2576 if (cmd == OSS_GETVERSION) 2577 return put_user(SNDRV_OSS_VERSION, p); 2578 if (cmd == OSS_ALSAEMULVER) 2579 return put_user(1, p); 2580 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2581 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2582 struct snd_pcm_substream *substream; 2583 int idx; 2584 for (idx = 0; idx < 2; ++idx) { 2585 substream = pcm_oss_file->streams[idx]; 2586 if (substream != NULL) 2587 break; 2588 } 2589 if (snd_BUG_ON(idx >= 2)) 2590 return -ENXIO; 2591 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2592 } 2593 #endif 2594 if (((cmd >> 8) & 0xff) != 'P') 2595 return -EINVAL; 2596 #ifdef OSS_DEBUG 2597 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2598 #endif 2599 switch (cmd) { 2600 case SNDCTL_DSP_RESET: 2601 return snd_pcm_oss_reset(pcm_oss_file); 2602 case SNDCTL_DSP_SYNC: 2603 return snd_pcm_oss_sync(pcm_oss_file); 2604 case SNDCTL_DSP_SPEED: 2605 if (get_user(res, p)) 2606 return -EFAULT; 2607 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2608 return res; 2609 return put_user(res, p); 2610 case SOUND_PCM_READ_RATE: 2611 res = snd_pcm_oss_get_rate(pcm_oss_file); 2612 if (res < 0) 2613 return res; 2614 return put_user(res, p); 2615 case SNDCTL_DSP_STEREO: 2616 if (get_user(res, p)) 2617 return -EFAULT; 2618 res = res > 0 ? 2 : 1; 2619 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2620 return res; 2621 return put_user(--res, p); 2622 case SNDCTL_DSP_GETBLKSIZE: 2623 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2624 if (res < 0) 2625 return res; 2626 return put_user(res, p); 2627 case SNDCTL_DSP_SETFMT: 2628 if (get_user(res, p)) 2629 return -EFAULT; 2630 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2631 if (res < 0) 2632 return res; 2633 return put_user(res, p); 2634 case SOUND_PCM_READ_BITS: 2635 res = snd_pcm_oss_get_format(pcm_oss_file); 2636 if (res < 0) 2637 return res; 2638 return put_user(res, p); 2639 case SNDCTL_DSP_CHANNELS: 2640 if (get_user(res, p)) 2641 return -EFAULT; 2642 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2643 if (res < 0) 2644 return res; 2645 return put_user(res, p); 2646 case SOUND_PCM_READ_CHANNELS: 2647 res = snd_pcm_oss_get_channels(pcm_oss_file); 2648 if (res < 0) 2649 return res; 2650 return put_user(res, p); 2651 case SOUND_PCM_WRITE_FILTER: 2652 case SOUND_PCM_READ_FILTER: 2653 return -EIO; 2654 case SNDCTL_DSP_POST: 2655 return snd_pcm_oss_post(pcm_oss_file); 2656 case SNDCTL_DSP_SUBDIVIDE: 2657 if (get_user(res, p)) 2658 return -EFAULT; 2659 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2660 if (res < 0) 2661 return res; 2662 return put_user(res, p); 2663 case SNDCTL_DSP_SETFRAGMENT: 2664 if (get_user(res, p)) 2665 return -EFAULT; 2666 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2667 case SNDCTL_DSP_GETFMTS: 2668 res = snd_pcm_oss_get_formats(pcm_oss_file); 2669 if (res < 0) 2670 return res; 2671 return put_user(res, p); 2672 case SNDCTL_DSP_GETOSPACE: 2673 case SNDCTL_DSP_GETISPACE: 2674 return snd_pcm_oss_get_space(pcm_oss_file, 2675 cmd == SNDCTL_DSP_GETISPACE ? 2676 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2677 (struct audio_buf_info __user *) arg); 2678 case SNDCTL_DSP_NONBLOCK: 2679 return snd_pcm_oss_nonblock(file); 2680 case SNDCTL_DSP_GETCAPS: 2681 res = snd_pcm_oss_get_caps(pcm_oss_file); 2682 if (res < 0) 2683 return res; 2684 return put_user(res, p); 2685 case SNDCTL_DSP_GETTRIGGER: 2686 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2687 if (res < 0) 2688 return res; 2689 return put_user(res, p); 2690 case SNDCTL_DSP_SETTRIGGER: 2691 if (get_user(res, p)) 2692 return -EFAULT; 2693 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2694 case SNDCTL_DSP_GETIPTR: 2695 case SNDCTL_DSP_GETOPTR: 2696 return snd_pcm_oss_get_ptr(pcm_oss_file, 2697 cmd == SNDCTL_DSP_GETIPTR ? 2698 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2699 (struct count_info __user *) arg); 2700 case SNDCTL_DSP_MAPINBUF: 2701 case SNDCTL_DSP_MAPOUTBUF: 2702 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2703 cmd == SNDCTL_DSP_MAPINBUF ? 2704 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2705 (struct buffmem_desc __user *) arg); 2706 case SNDCTL_DSP_SETSYNCRO: 2707 /* stop DMA now.. */ 2708 return 0; 2709 case SNDCTL_DSP_SETDUPLEX: 2710 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2711 return 0; 2712 return -EIO; 2713 case SNDCTL_DSP_GETODELAY: 2714 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2715 if (res < 0) { 2716 /* it's for sure, some broken apps don't check for error codes */ 2717 put_user(0, p); 2718 return res; 2719 } 2720 return put_user(res, p); 2721 case SNDCTL_DSP_PROFILE: 2722 return 0; /* silently ignore */ 2723 default: 2724 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2725 } 2726 return -EINVAL; 2727 } 2728 2729 #ifdef CONFIG_COMPAT 2730 /* all compatible */ 2731 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2732 unsigned long arg) 2733 { 2734 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2735 } 2736 #else 2737 #define snd_pcm_oss_ioctl_compat NULL 2738 #endif 2739 2740 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2741 { 2742 struct snd_pcm_oss_file *pcm_oss_file; 2743 struct snd_pcm_substream *substream; 2744 2745 pcm_oss_file = file->private_data; 2746 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2747 if (substream == NULL) 2748 return -ENXIO; 2749 substream->f_flags = file->f_flags & O_NONBLOCK; 2750 #ifndef OSS_DEBUG 2751 return snd_pcm_oss_read1(substream, buf, count); 2752 #else 2753 { 2754 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2755 pcm_dbg(substream->pcm, 2756 "pcm_oss: read %li bytes (returned %li bytes)\n", 2757 (long)count, (long)res); 2758 return res; 2759 } 2760 #endif 2761 } 2762 2763 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2764 { 2765 struct snd_pcm_oss_file *pcm_oss_file; 2766 struct snd_pcm_substream *substream; 2767 long result; 2768 2769 pcm_oss_file = file->private_data; 2770 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2771 if (substream == NULL) 2772 return -ENXIO; 2773 substream->f_flags = file->f_flags & O_NONBLOCK; 2774 result = snd_pcm_oss_write1(substream, buf, count); 2775 #ifdef OSS_DEBUG 2776 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2777 (long)count, (long)result); 2778 #endif 2779 return result; 2780 } 2781 2782 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2783 { 2784 struct snd_pcm_runtime *runtime = substream->runtime; 2785 if (atomic_read(&substream->mmap_count)) 2786 return runtime->oss.prev_hw_ptr_period != 2787 get_hw_ptr_period(runtime); 2788 else 2789 return snd_pcm_playback_avail(runtime) >= 2790 runtime->oss.period_frames; 2791 } 2792 2793 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2794 { 2795 struct snd_pcm_runtime *runtime = substream->runtime; 2796 if (atomic_read(&substream->mmap_count)) 2797 return runtime->oss.prev_hw_ptr_period != 2798 get_hw_ptr_period(runtime); 2799 else 2800 return snd_pcm_capture_avail(runtime) >= 2801 runtime->oss.period_frames; 2802 } 2803 2804 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) 2805 { 2806 struct snd_pcm_oss_file *pcm_oss_file; 2807 __poll_t mask; 2808 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2809 2810 pcm_oss_file = file->private_data; 2811 2812 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2813 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2814 2815 mask = 0; 2816 if (psubstream != NULL) { 2817 struct snd_pcm_runtime *runtime = psubstream->runtime; 2818 poll_wait(file, &runtime->sleep, wait); 2819 snd_pcm_stream_lock_irq(psubstream); 2820 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2821 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2822 snd_pcm_oss_playback_ready(psubstream))) 2823 mask |= EPOLLOUT | EPOLLWRNORM; 2824 snd_pcm_stream_unlock_irq(psubstream); 2825 } 2826 if (csubstream != NULL) { 2827 struct snd_pcm_runtime *runtime = csubstream->runtime; 2828 snd_pcm_state_t ostate; 2829 poll_wait(file, &runtime->sleep, wait); 2830 snd_pcm_stream_lock_irq(csubstream); 2831 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2832 snd_pcm_oss_capture_ready(csubstream)) 2833 mask |= EPOLLIN | EPOLLRDNORM; 2834 snd_pcm_stream_unlock_irq(csubstream); 2835 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2836 struct snd_pcm_oss_file ofile; 2837 memset(&ofile, 0, sizeof(ofile)); 2838 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2839 runtime->oss.trigger = 0; 2840 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2841 } 2842 } 2843 2844 return mask; 2845 } 2846 2847 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2848 { 2849 struct snd_pcm_oss_file *pcm_oss_file; 2850 struct snd_pcm_substream *substream = NULL; 2851 struct snd_pcm_runtime *runtime; 2852 int err; 2853 2854 #ifdef OSS_DEBUG 2855 pr_debug("pcm_oss: mmap begin\n"); 2856 #endif 2857 pcm_oss_file = file->private_data; 2858 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2859 case VM_READ | VM_WRITE: 2860 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2861 if (substream) 2862 break; 2863 /* Fall through */ 2864 case VM_READ: 2865 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2866 break; 2867 case VM_WRITE: 2868 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2869 break; 2870 default: 2871 return -EINVAL; 2872 } 2873 /* set VM_READ access as well to fix memset() routines that do 2874 reads before writes (to improve performance) */ 2875 area->vm_flags |= VM_READ; 2876 if (substream == NULL) 2877 return -ENXIO; 2878 runtime = substream->runtime; 2879 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2880 return -EIO; 2881 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2882 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2883 else 2884 return -EIO; 2885 2886 if (runtime->oss.params) { 2887 /* use mutex_trylock() for params_lock for avoiding a deadlock 2888 * between mmap_sem and params_lock taken by 2889 * copy_from/to_user() in snd_pcm_oss_write/read() 2890 */ 2891 err = snd_pcm_oss_change_params(substream, true); 2892 if (err < 0) 2893 return err; 2894 } 2895 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2896 if (runtime->oss.plugin_first != NULL) 2897 return -EIO; 2898 #endif 2899 2900 if (area->vm_pgoff != 0) 2901 return -EINVAL; 2902 2903 err = snd_pcm_mmap_data(substream, file, area); 2904 if (err < 0) 2905 return err; 2906 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2907 runtime->silence_threshold = 0; 2908 runtime->silence_size = 0; 2909 #ifdef OSS_DEBUG 2910 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2911 runtime->oss.mmap_bytes); 2912 #endif 2913 /* In mmap mode we never stop */ 2914 runtime->stop_threshold = runtime->boundary; 2915 2916 return 0; 2917 } 2918 2919 #ifdef CONFIG_SND_VERBOSE_PROCFS 2920 /* 2921 * /proc interface 2922 */ 2923 2924 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2925 struct snd_info_buffer *buffer) 2926 { 2927 struct snd_pcm_str *pstr = entry->private_data; 2928 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2929 mutex_lock(&pstr->oss.setup_mutex); 2930 while (setup) { 2931 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2932 setup->task_name, 2933 setup->periods, 2934 setup->period_size, 2935 setup->disable ? " disable" : "", 2936 setup->direct ? " direct" : "", 2937 setup->block ? " block" : "", 2938 setup->nonblock ? " non-block" : "", 2939 setup->partialfrag ? " partial-frag" : "", 2940 setup->nosilence ? " no-silence" : ""); 2941 setup = setup->next; 2942 } 2943 mutex_unlock(&pstr->oss.setup_mutex); 2944 } 2945 2946 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2947 { 2948 struct snd_pcm_oss_setup *setup, *setupn; 2949 2950 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2951 setup; setup = setupn) { 2952 setupn = setup->next; 2953 kfree(setup->task_name); 2954 kfree(setup); 2955 } 2956 pstr->oss.setup_list = NULL; 2957 } 2958 2959 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2960 struct snd_info_buffer *buffer) 2961 { 2962 struct snd_pcm_str *pstr = entry->private_data; 2963 char line[128], str[32], task_name[32]; 2964 const char *ptr; 2965 int idx1; 2966 struct snd_pcm_oss_setup *setup, *setup1, template; 2967 2968 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2969 mutex_lock(&pstr->oss.setup_mutex); 2970 memset(&template, 0, sizeof(template)); 2971 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2972 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2973 snd_pcm_oss_proc_free_setup_list(pstr); 2974 mutex_unlock(&pstr->oss.setup_mutex); 2975 continue; 2976 } 2977 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2978 if (!strcmp(setup->task_name, task_name)) { 2979 template = *setup; 2980 break; 2981 } 2982 } 2983 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2984 template.periods = simple_strtoul(str, NULL, 10); 2985 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2986 template.period_size = simple_strtoul(str, NULL, 10); 2987 for (idx1 = 31; idx1 >= 0; idx1--) 2988 if (template.period_size & (1 << idx1)) 2989 break; 2990 for (idx1--; idx1 >= 0; idx1--) 2991 template.period_size &= ~(1 << idx1); 2992 do { 2993 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2994 if (!strcmp(str, "disable")) { 2995 template.disable = 1; 2996 } else if (!strcmp(str, "direct")) { 2997 template.direct = 1; 2998 } else if (!strcmp(str, "block")) { 2999 template.block = 1; 3000 } else if (!strcmp(str, "non-block")) { 3001 template.nonblock = 1; 3002 } else if (!strcmp(str, "partial-frag")) { 3003 template.partialfrag = 1; 3004 } else if (!strcmp(str, "no-silence")) { 3005 template.nosilence = 1; 3006 } else if (!strcmp(str, "buggy-ptr")) { 3007 template.buggyptr = 1; 3008 } 3009 } while (*str); 3010 if (setup == NULL) { 3011 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 3012 if (! setup) { 3013 buffer->error = -ENOMEM; 3014 mutex_unlock(&pstr->oss.setup_mutex); 3015 return; 3016 } 3017 if (pstr->oss.setup_list == NULL) 3018 pstr->oss.setup_list = setup; 3019 else { 3020 for (setup1 = pstr->oss.setup_list; 3021 setup1->next; setup1 = setup1->next); 3022 setup1->next = setup; 3023 } 3024 template.task_name = kstrdup(task_name, GFP_KERNEL); 3025 if (! template.task_name) { 3026 kfree(setup); 3027 buffer->error = -ENOMEM; 3028 mutex_unlock(&pstr->oss.setup_mutex); 3029 return; 3030 } 3031 } 3032 *setup = template; 3033 mutex_unlock(&pstr->oss.setup_mutex); 3034 } 3035 } 3036 3037 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3038 { 3039 int stream; 3040 for (stream = 0; stream < 2; ++stream) { 3041 struct snd_info_entry *entry; 3042 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3043 if (pstr->substream_count == 0) 3044 continue; 3045 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 3046 entry->content = SNDRV_INFO_CONTENT_TEXT; 3047 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 3048 entry->c.text.read = snd_pcm_oss_proc_read; 3049 entry->c.text.write = snd_pcm_oss_proc_write; 3050 entry->private_data = pstr; 3051 if (snd_info_register(entry) < 0) { 3052 snd_info_free_entry(entry); 3053 entry = NULL; 3054 } 3055 } 3056 pstr->oss.proc_entry = entry; 3057 } 3058 } 3059 3060 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3061 { 3062 int stream; 3063 for (stream = 0; stream < 2; ++stream) { 3064 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3065 snd_info_free_entry(pstr->oss.proc_entry); 3066 pstr->oss.proc_entry = NULL; 3067 snd_pcm_oss_proc_free_setup_list(pstr); 3068 } 3069 } 3070 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 3071 #define snd_pcm_oss_proc_init(pcm) 3072 #define snd_pcm_oss_proc_done(pcm) 3073 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 3074 3075 /* 3076 * ENTRY functions 3077 */ 3078 3079 static const struct file_operations snd_pcm_oss_f_reg = 3080 { 3081 .owner = THIS_MODULE, 3082 .read = snd_pcm_oss_read, 3083 .write = snd_pcm_oss_write, 3084 .open = snd_pcm_oss_open, 3085 .release = snd_pcm_oss_release, 3086 .llseek = no_llseek, 3087 .poll = snd_pcm_oss_poll, 3088 .unlocked_ioctl = snd_pcm_oss_ioctl, 3089 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3090 .mmap = snd_pcm_oss_mmap, 3091 }; 3092 3093 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3094 { 3095 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3096 pcm->card, index, &snd_pcm_oss_f_reg, 3097 pcm) < 0) { 3098 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3099 pcm->card->number, pcm->device); 3100 } 3101 } 3102 3103 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3104 { 3105 pcm->oss.reg = 0; 3106 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3107 char name[128]; 3108 int duplex; 3109 register_oss_dsp(pcm, 0); 3110 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3111 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3112 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3113 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3114 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3115 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3116 pcm->card->number, 3117 name); 3118 #endif 3119 pcm->oss.reg++; 3120 pcm->oss.reg_mask |= 1; 3121 } 3122 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3123 register_oss_dsp(pcm, 1); 3124 pcm->oss.reg++; 3125 pcm->oss.reg_mask |= 2; 3126 } 3127 3128 if (pcm->oss.reg) 3129 snd_pcm_oss_proc_init(pcm); 3130 3131 return 0; 3132 } 3133 3134 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3135 { 3136 if (pcm->oss.reg) { 3137 if (pcm->oss.reg_mask & 1) { 3138 pcm->oss.reg_mask &= ~1; 3139 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3140 pcm->card, 0); 3141 } 3142 if (pcm->oss.reg_mask & 2) { 3143 pcm->oss.reg_mask &= ~2; 3144 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3145 pcm->card, 1); 3146 } 3147 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3148 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3149 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3150 #endif 3151 } 3152 pcm->oss.reg = 0; 3153 } 3154 return 0; 3155 } 3156 3157 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3158 { 3159 snd_pcm_oss_disconnect_minor(pcm); 3160 snd_pcm_oss_proc_done(pcm); 3161 return 0; 3162 } 3163 3164 static struct snd_pcm_notify snd_pcm_oss_notify = 3165 { 3166 .n_register = snd_pcm_oss_register_minor, 3167 .n_disconnect = snd_pcm_oss_disconnect_minor, 3168 .n_unregister = snd_pcm_oss_unregister_minor, 3169 }; 3170 3171 static int __init alsa_pcm_oss_init(void) 3172 { 3173 int i; 3174 int err; 3175 3176 /* check device map table */ 3177 for (i = 0; i < SNDRV_CARDS; i++) { 3178 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3179 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3180 i, dsp_map[i]); 3181 dsp_map[i] = 0; 3182 } 3183 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3184 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3185 i, adsp_map[i]); 3186 adsp_map[i] = 1; 3187 } 3188 } 3189 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3190 return err; 3191 return 0; 3192 } 3193 3194 static void __exit alsa_pcm_oss_exit(void) 3195 { 3196 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3197 } 3198 3199 module_init(alsa_pcm_oss_init) 3200 module_exit(alsa_pcm_oss_exit) 3201