1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Digital Audio (PCM) abstract layer / OSS compatible 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 5 */ 6 7 #if 0 8 #define PLUGIN_DEBUG 9 #endif 10 #if 0 11 #define OSS_DEBUG 12 #endif 13 14 #include <linux/init.h> 15 #include <linux/slab.h> 16 #include <linux/sched/signal.h> 17 #include <linux/time.h> 18 #include <linux/vmalloc.h> 19 #include <linux/module.h> 20 #include <linux/math64.h> 21 #include <linux/string.h> 22 #include <linux/compat.h> 23 #include <sound/core.h> 24 #include <sound/minors.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include "pcm_plugin.h" 28 #include <sound/info.h> 29 #include <linux/soundcard.h> 30 #include <sound/initval.h> 31 #include <sound/mixer_oss.h> 32 33 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 34 35 static int dsp_map[SNDRV_CARDS]; 36 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 37 static bool nonblock_open = 1; 38 39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 40 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 41 MODULE_LICENSE("GPL"); 42 module_param_array(dsp_map, int, NULL, 0444); 43 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 44 module_param_array(adsp_map, int, NULL, 0444); 45 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 46 module_param(nonblock_open, bool, 0644); 47 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 48 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 49 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 50 51 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 52 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 53 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 54 55 /* 56 * helper functions to process hw_params 57 */ 58 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 59 { 60 int changed = 0; 61 if (i->min < min) { 62 i->min = min; 63 i->openmin = openmin; 64 changed = 1; 65 } else if (i->min == min && !i->openmin && openmin) { 66 i->openmin = 1; 67 changed = 1; 68 } 69 if (i->integer) { 70 if (i->openmin) { 71 i->min++; 72 i->openmin = 0; 73 } 74 } 75 if (snd_interval_checkempty(i)) { 76 snd_interval_none(i); 77 return -EINVAL; 78 } 79 return changed; 80 } 81 82 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 83 { 84 int changed = 0; 85 if (i->max > max) { 86 i->max = max; 87 i->openmax = openmax; 88 changed = 1; 89 } else if (i->max == max && !i->openmax && openmax) { 90 i->openmax = 1; 91 changed = 1; 92 } 93 if (i->integer) { 94 if (i->openmax) { 95 i->max--; 96 i->openmax = 0; 97 } 98 } 99 if (snd_interval_checkempty(i)) { 100 snd_interval_none(i); 101 return -EINVAL; 102 } 103 return changed; 104 } 105 106 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 107 { 108 struct snd_interval t; 109 t.empty = 0; 110 t.min = t.max = val; 111 t.openmin = t.openmax = 0; 112 t.integer = 1; 113 return snd_interval_refine(i, &t); 114 } 115 116 /** 117 * snd_pcm_hw_param_value_min 118 * @params: the hw_params instance 119 * @var: parameter to retrieve 120 * @dir: pointer to the direction (-1,0,1) or NULL 121 * 122 * Return the minimum value for field PAR. 123 */ 124 static unsigned int 125 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 126 snd_pcm_hw_param_t var, int *dir) 127 { 128 if (hw_is_mask(var)) { 129 if (dir) 130 *dir = 0; 131 return snd_mask_min(hw_param_mask_c(params, var)); 132 } 133 if (hw_is_interval(var)) { 134 const struct snd_interval *i = hw_param_interval_c(params, var); 135 if (dir) 136 *dir = i->openmin; 137 return snd_interval_min(i); 138 } 139 return -EINVAL; 140 } 141 142 /** 143 * snd_pcm_hw_param_value_max 144 * @params: the hw_params instance 145 * @var: parameter to retrieve 146 * @dir: pointer to the direction (-1,0,1) or NULL 147 * 148 * Return the maximum value for field PAR. 149 */ 150 static int 151 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 152 snd_pcm_hw_param_t var, int *dir) 153 { 154 if (hw_is_mask(var)) { 155 if (dir) 156 *dir = 0; 157 return snd_mask_max(hw_param_mask_c(params, var)); 158 } 159 if (hw_is_interval(var)) { 160 const struct snd_interval *i = hw_param_interval_c(params, var); 161 if (dir) 162 *dir = - (int) i->openmax; 163 return snd_interval_max(i); 164 } 165 return -EINVAL; 166 } 167 168 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 169 snd_pcm_hw_param_t var, 170 const struct snd_mask *val) 171 { 172 int changed; 173 changed = snd_mask_refine(hw_param_mask(params, var), val); 174 if (changed > 0) { 175 params->cmask |= 1 << var; 176 params->rmask |= 1 << var; 177 } 178 return changed; 179 } 180 181 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 182 struct snd_pcm_hw_params *params, 183 snd_pcm_hw_param_t var, 184 const struct snd_mask *val) 185 { 186 int changed = _snd_pcm_hw_param_mask(params, var, val); 187 if (changed < 0) 188 return changed; 189 if (params->rmask) { 190 int err = snd_pcm_hw_refine(pcm, params); 191 if (err < 0) 192 return err; 193 } 194 return 0; 195 } 196 197 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 198 snd_pcm_hw_param_t var, unsigned int val, 199 int dir) 200 { 201 int changed; 202 int open = 0; 203 if (dir) { 204 if (dir > 0) { 205 open = 1; 206 } else if (dir < 0) { 207 if (val > 0) { 208 open = 1; 209 val--; 210 } 211 } 212 } 213 if (hw_is_mask(var)) 214 changed = snd_mask_refine_min(hw_param_mask(params, var), 215 val + !!open); 216 else if (hw_is_interval(var)) 217 changed = snd_interval_refine_min(hw_param_interval(params, var), 218 val, open); 219 else 220 return -EINVAL; 221 if (changed > 0) { 222 params->cmask |= 1 << var; 223 params->rmask |= 1 << var; 224 } 225 return changed; 226 } 227 228 /** 229 * snd_pcm_hw_param_min 230 * @pcm: PCM instance 231 * @params: the hw_params instance 232 * @var: parameter to retrieve 233 * @val: minimal value 234 * @dir: pointer to the direction (-1,0,1) or NULL 235 * 236 * Inside configuration space defined by PARAMS remove from PAR all 237 * values < VAL. Reduce configuration space accordingly. 238 * Return new minimum or -EINVAL if the configuration space is empty 239 */ 240 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 241 struct snd_pcm_hw_params *params, 242 snd_pcm_hw_param_t var, unsigned int val, 243 int *dir) 244 { 245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 246 if (changed < 0) 247 return changed; 248 if (params->rmask) { 249 int err = snd_pcm_hw_refine(pcm, params); 250 if (err < 0) 251 return err; 252 } 253 return snd_pcm_hw_param_value_min(params, var, dir); 254 } 255 256 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 257 snd_pcm_hw_param_t var, unsigned int val, 258 int dir) 259 { 260 int changed; 261 int open = 0; 262 if (dir) { 263 if (dir < 0) { 264 open = 1; 265 } else if (dir > 0) { 266 open = 1; 267 val++; 268 } 269 } 270 if (hw_is_mask(var)) { 271 if (val == 0 && open) { 272 snd_mask_none(hw_param_mask(params, var)); 273 changed = -EINVAL; 274 } else 275 changed = snd_mask_refine_max(hw_param_mask(params, var), 276 val - !!open); 277 } else if (hw_is_interval(var)) 278 changed = snd_interval_refine_max(hw_param_interval(params, var), 279 val, open); 280 else 281 return -EINVAL; 282 if (changed > 0) { 283 params->cmask |= 1 << var; 284 params->rmask |= 1 << var; 285 } 286 return changed; 287 } 288 289 /** 290 * snd_pcm_hw_param_max 291 * @pcm: PCM instance 292 * @params: the hw_params instance 293 * @var: parameter to retrieve 294 * @val: maximal value 295 * @dir: pointer to the direction (-1,0,1) or NULL 296 * 297 * Inside configuration space defined by PARAMS remove from PAR all 298 * values >= VAL + 1. Reduce configuration space accordingly. 299 * Return new maximum or -EINVAL if the configuration space is empty 300 */ 301 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 302 struct snd_pcm_hw_params *params, 303 snd_pcm_hw_param_t var, unsigned int val, 304 int *dir) 305 { 306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 307 if (changed < 0) 308 return changed; 309 if (params->rmask) { 310 int err = snd_pcm_hw_refine(pcm, params); 311 if (err < 0) 312 return err; 313 } 314 return snd_pcm_hw_param_value_max(params, var, dir); 315 } 316 317 static int boundary_sub(int a, int adir, 318 int b, int bdir, 319 int *c, int *cdir) 320 { 321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 323 *c = a - b; 324 *cdir = adir - bdir; 325 if (*cdir == -2) { 326 (*c)--; 327 } else if (*cdir == 2) { 328 (*c)++; 329 } 330 return 0; 331 } 332 333 static int boundary_lt(unsigned int a, int adir, 334 unsigned int b, int bdir) 335 { 336 if (adir < 0) { 337 a--; 338 adir = 1; 339 } else if (adir > 0) 340 adir = 1; 341 if (bdir < 0) { 342 b--; 343 bdir = 1; 344 } else if (bdir > 0) 345 bdir = 1; 346 return a < b || (a == b && adir < bdir); 347 } 348 349 /* Return 1 if min is nearer to best than max */ 350 static int boundary_nearer(int min, int mindir, 351 int best, int bestdir, 352 int max, int maxdir) 353 { 354 int dmin, dmindir; 355 int dmax, dmaxdir; 356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 358 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 359 } 360 361 /** 362 * snd_pcm_hw_param_near 363 * @pcm: PCM instance 364 * @params: the hw_params instance 365 * @var: parameter to retrieve 366 * @best: value to set 367 * @dir: pointer to the direction (-1,0,1) or NULL 368 * 369 * Inside configuration space defined by PARAMS set PAR to the available value 370 * nearest to VAL. Reduce configuration space accordingly. 371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 373 * Return the value found. 374 */ 375 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 376 struct snd_pcm_hw_params *params, 377 snd_pcm_hw_param_t var, unsigned int best, 378 int *dir) 379 { 380 int v; 381 unsigned int saved_min; 382 int last = 0; 383 int min, max; 384 int mindir, maxdir; 385 int valdir = dir ? *dir : 0; 386 /* FIXME */ 387 if (best > INT_MAX) 388 best = INT_MAX; 389 min = max = best; 390 mindir = maxdir = valdir; 391 if (maxdir > 0) 392 maxdir = 0; 393 else if (maxdir == 0) 394 maxdir = -1; 395 else { 396 maxdir = 1; 397 max--; 398 } 399 400 struct snd_pcm_hw_params *save __free(kfree) = 401 kmalloc(sizeof(*save), GFP_KERNEL); 402 if (save == NULL) 403 return -ENOMEM; 404 *save = *params; 405 saved_min = min; 406 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 407 if (min >= 0) { 408 if (max < 0) 409 goto _end; 410 if ((unsigned int)min == saved_min && mindir == valdir) 411 goto _end; 412 413 struct snd_pcm_hw_params *params1 __free(kfree) = 414 kmalloc(sizeof(*params1), GFP_KERNEL); 415 if (params1 == NULL) 416 return -ENOMEM; 417 *params1 = *save; 418 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 419 if (max < 0) 420 goto _end; 421 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 422 *params = *params1; 423 last = 1; 424 } 425 } else { 426 *params = *save; 427 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 428 if (max < 0) 429 return max; 430 last = 1; 431 } 432 _end: 433 if (last) 434 v = snd_pcm_hw_param_last(pcm, params, var, dir); 435 else 436 v = snd_pcm_hw_param_first(pcm, params, var, dir); 437 return v; 438 } 439 440 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 441 snd_pcm_hw_param_t var, unsigned int val, 442 int dir) 443 { 444 int changed; 445 if (hw_is_mask(var)) { 446 struct snd_mask *m = hw_param_mask(params, var); 447 if (val == 0 && dir < 0) { 448 changed = -EINVAL; 449 snd_mask_none(m); 450 } else { 451 if (dir > 0) 452 val++; 453 else if (dir < 0) 454 val--; 455 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 456 } 457 } else if (hw_is_interval(var)) { 458 struct snd_interval *i = hw_param_interval(params, var); 459 if (val == 0 && dir < 0) { 460 changed = -EINVAL; 461 snd_interval_none(i); 462 } else if (dir == 0) 463 changed = snd_interval_refine_set(i, val); 464 else { 465 struct snd_interval t; 466 t.openmin = 1; 467 t.openmax = 1; 468 t.empty = 0; 469 t.integer = 0; 470 if (dir < 0) { 471 t.min = val - 1; 472 t.max = val; 473 } else { 474 t.min = val; 475 t.max = val+1; 476 } 477 changed = snd_interval_refine(i, &t); 478 } 479 } else 480 return -EINVAL; 481 if (changed > 0) { 482 params->cmask |= 1 << var; 483 params->rmask |= 1 << var; 484 } 485 return changed; 486 } 487 488 /** 489 * snd_pcm_hw_param_set 490 * @pcm: PCM instance 491 * @params: the hw_params instance 492 * @var: parameter to retrieve 493 * @val: value to set 494 * @dir: pointer to the direction (-1,0,1) or NULL 495 * 496 * Inside configuration space defined by PARAMS remove from PAR all 497 * values != VAL. Reduce configuration space accordingly. 498 * Return VAL or -EINVAL if the configuration space is empty 499 */ 500 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 501 struct snd_pcm_hw_params *params, 502 snd_pcm_hw_param_t var, unsigned int val, 503 int dir) 504 { 505 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 506 if (changed < 0) 507 return changed; 508 if (params->rmask) { 509 int err = snd_pcm_hw_refine(pcm, params); 510 if (err < 0) 511 return err; 512 } 513 return snd_pcm_hw_param_value(params, var, NULL); 514 } 515 516 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 517 snd_pcm_hw_param_t var) 518 { 519 int changed; 520 changed = snd_interval_setinteger(hw_param_interval(params, var)); 521 if (changed > 0) { 522 params->cmask |= 1 << var; 523 params->rmask |= 1 << var; 524 } 525 return changed; 526 } 527 528 /* 529 * plugin 530 */ 531 532 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 533 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 534 { 535 struct snd_pcm_runtime *runtime = substream->runtime; 536 struct snd_pcm_plugin *plugin, *next; 537 538 plugin = runtime->oss.plugin_first; 539 while (plugin) { 540 next = plugin->next; 541 snd_pcm_plugin_free(plugin); 542 plugin = next; 543 } 544 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 545 return 0; 546 } 547 548 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 549 { 550 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 551 plugin->next = runtime->oss.plugin_first; 552 plugin->prev = NULL; 553 if (runtime->oss.plugin_first) { 554 runtime->oss.plugin_first->prev = plugin; 555 runtime->oss.plugin_first = plugin; 556 } else { 557 runtime->oss.plugin_last = 558 runtime->oss.plugin_first = plugin; 559 } 560 return 0; 561 } 562 563 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 564 { 565 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 566 plugin->next = NULL; 567 plugin->prev = runtime->oss.plugin_last; 568 if (runtime->oss.plugin_last) { 569 runtime->oss.plugin_last->next = plugin; 570 runtime->oss.plugin_last = plugin; 571 } else { 572 runtime->oss.plugin_last = 573 runtime->oss.plugin_first = plugin; 574 } 575 return 0; 576 } 577 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 578 579 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 580 { 581 struct snd_pcm_runtime *runtime = substream->runtime; 582 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 583 long bytes = frames_to_bytes(runtime, frames); 584 if (buffer_size == runtime->oss.buffer_bytes) 585 return bytes; 586 #if BITS_PER_LONG >= 64 587 return runtime->oss.buffer_bytes * bytes / buffer_size; 588 #else 589 { 590 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 591 return div_u64(bsize, buffer_size); 592 } 593 #endif 594 } 595 596 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 597 { 598 struct snd_pcm_runtime *runtime = substream->runtime; 599 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 600 if (buffer_size == runtime->oss.buffer_bytes) 601 return bytes_to_frames(runtime, bytes); 602 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 603 } 604 605 static inline 606 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 607 { 608 return runtime->hw_ptr_interrupt; 609 } 610 611 /* define extended formats in the recent OSS versions (if any) */ 612 /* linear formats */ 613 #define AFMT_S32_LE 0x00001000 614 #define AFMT_S32_BE 0x00002000 615 #define AFMT_S24_LE 0x00008000 616 #define AFMT_S24_BE 0x00010000 617 #define AFMT_S24_PACKED 0x00040000 618 619 /* other supported formats */ 620 #define AFMT_FLOAT 0x00004000 621 #define AFMT_SPDIF_RAW 0x00020000 622 623 /* unsupported formats */ 624 #define AFMT_AC3 0x00000400 625 #define AFMT_VORBIS 0x00000800 626 627 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 628 { 629 switch (format) { 630 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 631 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 632 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 633 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 634 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 635 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 636 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 637 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 638 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 639 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 640 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 641 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 642 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 643 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 644 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 645 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 646 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 647 default: return SNDRV_PCM_FORMAT_U8; 648 } 649 } 650 651 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 652 { 653 switch (format) { 654 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 655 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 656 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 657 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 658 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 659 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 660 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 661 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 662 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 663 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 664 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 665 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 666 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 667 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 668 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 669 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 670 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 671 default: return -EINVAL; 672 } 673 } 674 675 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 676 struct snd_pcm_hw_params *oss_params, 677 struct snd_pcm_hw_params *slave_params) 678 { 679 ssize_t s; 680 ssize_t oss_buffer_size; 681 ssize_t oss_period_size, oss_periods; 682 ssize_t min_period_size, max_period_size; 683 struct snd_pcm_runtime *runtime = substream->runtime; 684 size_t oss_frame_size; 685 686 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 687 params_channels(oss_params) / 8; 688 689 oss_buffer_size = snd_pcm_hw_param_value_max(slave_params, 690 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 691 NULL); 692 if (oss_buffer_size <= 0) 693 return -EINVAL; 694 oss_buffer_size = snd_pcm_plug_client_size(substream, 695 oss_buffer_size * oss_frame_size); 696 if (oss_buffer_size <= 0) 697 return -EINVAL; 698 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 699 if (atomic_read(&substream->mmap_count)) { 700 if (oss_buffer_size > runtime->oss.mmap_bytes) 701 oss_buffer_size = runtime->oss.mmap_bytes; 702 } 703 704 if (substream->oss.setup.period_size > 16) 705 oss_period_size = substream->oss.setup.period_size; 706 else if (runtime->oss.fragshift) { 707 oss_period_size = 1 << runtime->oss.fragshift; 708 if (oss_period_size > oss_buffer_size / 2) 709 oss_period_size = oss_buffer_size / 2; 710 } else { 711 int sd; 712 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 713 714 oss_period_size = oss_buffer_size; 715 do { 716 oss_period_size /= 2; 717 } while (oss_period_size > bytes_per_sec); 718 if (runtime->oss.subdivision == 0) { 719 sd = 4; 720 if (oss_period_size / sd > 4096) 721 sd *= 2; 722 if (oss_period_size / sd < 4096) 723 sd = 1; 724 } else 725 sd = runtime->oss.subdivision; 726 oss_period_size /= sd; 727 if (oss_period_size < 16) 728 oss_period_size = 16; 729 } 730 731 min_period_size = snd_pcm_plug_client_size(substream, 732 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 733 if (min_period_size > 0) { 734 min_period_size *= oss_frame_size; 735 min_period_size = roundup_pow_of_two(min_period_size); 736 if (oss_period_size < min_period_size) 737 oss_period_size = min_period_size; 738 } 739 740 max_period_size = snd_pcm_plug_client_size(substream, 741 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 742 if (max_period_size > 0) { 743 max_period_size *= oss_frame_size; 744 max_period_size = rounddown_pow_of_two(max_period_size); 745 if (oss_period_size > max_period_size) 746 oss_period_size = max_period_size; 747 } 748 749 oss_periods = oss_buffer_size / oss_period_size; 750 751 if (substream->oss.setup.periods > 1) 752 oss_periods = substream->oss.setup.periods; 753 754 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 755 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags) 756 s = runtime->oss.maxfrags; 757 if (oss_periods > s) 758 oss_periods = s; 759 760 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 761 if (s < 2) 762 s = 2; 763 if (oss_periods < s) 764 oss_periods = s; 765 766 while (oss_period_size * oss_periods > oss_buffer_size) 767 oss_period_size /= 2; 768 769 if (oss_period_size < 16) 770 return -EINVAL; 771 772 /* don't allocate too large period; 1MB period must be enough */ 773 if (oss_period_size > 1024 * 1024) 774 return -ENOMEM; 775 776 runtime->oss.period_bytes = oss_period_size; 777 runtime->oss.period_frames = 1; 778 runtime->oss.periods = oss_periods; 779 return 0; 780 } 781 782 static int choose_rate(struct snd_pcm_substream *substream, 783 struct snd_pcm_hw_params *params, unsigned int best_rate) 784 { 785 const struct snd_interval *it; 786 unsigned int rate, prev; 787 788 struct snd_pcm_hw_params *save __free(kfree) = 789 kmalloc(sizeof(*save), GFP_KERNEL); 790 if (save == NULL) 791 return -ENOMEM; 792 *save = *params; 793 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); 794 795 /* try multiples of the best rate */ 796 rate = best_rate; 797 for (;;) { 798 if (it->max < rate || (it->max == rate && it->openmax)) 799 break; 800 if (it->min < rate || (it->min == rate && !it->openmin)) { 801 int ret; 802 ret = snd_pcm_hw_param_set(substream, params, 803 SNDRV_PCM_HW_PARAM_RATE, 804 rate, 0); 805 if (ret == (int)rate) 806 return rate; 807 *params = *save; 808 } 809 prev = rate; 810 rate += best_rate; 811 if (rate <= prev) 812 break; 813 } 814 815 /* not found, use the nearest rate */ 816 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 817 } 818 819 /* parameter locking: returns immediately if tried during streaming */ 820 static int lock_params(struct snd_pcm_runtime *runtime) 821 { 822 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 823 return -ERESTARTSYS; 824 if (atomic_read(&runtime->oss.rw_ref)) { 825 mutex_unlock(&runtime->oss.params_lock); 826 return -EBUSY; 827 } 828 return 0; 829 } 830 831 static void unlock_params(struct snd_pcm_runtime *runtime) 832 { 833 mutex_unlock(&runtime->oss.params_lock); 834 } 835 836 static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream) 837 { 838 struct snd_pcm_runtime *runtime = substream->runtime; 839 840 kvfree(runtime->oss.buffer); 841 runtime->oss.buffer = NULL; 842 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 843 snd_pcm_oss_plugin_clear(substream); 844 #endif 845 } 846 847 /* call with params_lock held */ 848 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) 849 { 850 struct snd_pcm_runtime *runtime = substream->runtime; 851 struct snd_pcm_hw_params *params, *sparams; 852 struct snd_pcm_sw_params *sw_params; 853 ssize_t oss_buffer_size, oss_period_size; 854 size_t oss_frame_size; 855 int err; 856 int direct; 857 snd_pcm_format_t format, sformat; 858 int n; 859 const struct snd_mask *sformat_mask; 860 struct snd_mask mask; 861 862 if (!runtime->oss.params) 863 return 0; 864 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 865 params = kmalloc(sizeof(*params), GFP_KERNEL); 866 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 867 if (!sw_params || !params || !sparams) { 868 err = -ENOMEM; 869 goto failure; 870 } 871 872 if (atomic_read(&substream->mmap_count)) 873 direct = 1; 874 else 875 direct = substream->oss.setup.direct; 876 877 _snd_pcm_hw_params_any(sparams); 878 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 879 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 880 snd_mask_none(&mask); 881 if (atomic_read(&substream->mmap_count)) 882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 883 else { 884 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 885 if (!direct) 886 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 887 } 888 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 889 if (err < 0) { 890 pcm_dbg(substream->pcm, "No usable accesses\n"); 891 err = -EINVAL; 892 goto failure; 893 } 894 895 err = choose_rate(substream, sparams, runtime->oss.rate); 896 if (err < 0) 897 goto failure; 898 err = snd_pcm_hw_param_near(substream, sparams, 899 SNDRV_PCM_HW_PARAM_CHANNELS, 900 runtime->oss.channels, NULL); 901 if (err < 0) 902 goto failure; 903 904 format = snd_pcm_oss_format_from(runtime->oss.format); 905 906 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 907 if (direct) 908 sformat = format; 909 else 910 sformat = snd_pcm_plug_slave_format(format, sformat_mask); 911 912 if ((__force int)sformat < 0 || 913 !snd_mask_test_format(sformat_mask, sformat)) { 914 pcm_for_each_format(sformat) { 915 if (snd_mask_test_format(sformat_mask, sformat) && 916 snd_pcm_oss_format_to(sformat) >= 0) 917 goto format_found; 918 } 919 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 920 err = -EINVAL; 921 goto failure; 922 } 923 format_found: 924 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 925 if (err < 0) 926 goto failure; 927 928 if (direct) { 929 memcpy(params, sparams, sizeof(*params)); 930 } else { 931 _snd_pcm_hw_params_any(params); 932 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 933 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 934 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 935 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 936 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 937 runtime->oss.channels, 0); 938 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 939 runtime->oss.rate, 0); 940 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 941 params_access(params), params_format(params), 942 params_channels(params), params_rate(params)); 943 } 944 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 945 params_access(sparams), params_format(sparams), 946 params_channels(sparams), params_rate(sparams)); 947 948 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 949 params_channels(params) / 8; 950 951 err = snd_pcm_oss_period_size(substream, params, sparams); 952 if (err < 0) 953 goto failure; 954 955 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 956 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 957 if (err < 0) 958 goto failure; 959 960 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 961 runtime->oss.periods, NULL); 962 if (err < 0) 963 goto failure; 964 965 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 966 967 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams); 968 if (err < 0) { 969 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 970 goto failure; 971 } 972 973 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 974 snd_pcm_oss_plugin_clear(substream); 975 if (!direct) { 976 /* add necessary plugins */ 977 err = snd_pcm_plug_format_plugins(substream, params, sparams); 978 if (err < 0) { 979 pcm_dbg(substream->pcm, 980 "snd_pcm_plug_format_plugins failed: %i\n", err); 981 goto failure; 982 } 983 if (runtime->oss.plugin_first) { 984 struct snd_pcm_plugin *plugin; 985 err = snd_pcm_plugin_build_io(substream, sparams, &plugin); 986 if (err < 0) { 987 pcm_dbg(substream->pcm, 988 "snd_pcm_plugin_build_io failed: %i\n", err); 989 goto failure; 990 } 991 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 992 err = snd_pcm_plugin_append(plugin); 993 } else { 994 err = snd_pcm_plugin_insert(plugin); 995 } 996 if (err < 0) 997 goto failure; 998 } 999 } 1000 #endif 1001 1002 if (runtime->oss.trigger) { 1003 sw_params->start_threshold = 1; 1004 } else { 1005 sw_params->start_threshold = runtime->boundary; 1006 } 1007 if (atomic_read(&substream->mmap_count) || 1008 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1009 sw_params->stop_threshold = runtime->boundary; 1010 else 1011 sw_params->stop_threshold = runtime->buffer_size; 1012 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1013 sw_params->period_step = 1; 1014 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1015 1 : runtime->period_size; 1016 if (atomic_read(&substream->mmap_count) || 1017 substream->oss.setup.nosilence) { 1018 sw_params->silence_threshold = 0; 1019 sw_params->silence_size = 0; 1020 } else { 1021 snd_pcm_uframes_t frames; 1022 frames = runtime->period_size + 16; 1023 if (frames > runtime->buffer_size) 1024 frames = runtime->buffer_size; 1025 sw_params->silence_threshold = frames; 1026 sw_params->silence_size = frames; 1027 } 1028 1029 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params); 1030 if (err < 0) { 1031 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1032 goto failure; 1033 } 1034 1035 runtime->oss.periods = params_periods(sparams); 1036 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1037 if (oss_period_size < 0) { 1038 err = -EINVAL; 1039 goto failure; 1040 } 1041 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1042 if (runtime->oss.plugin_first) { 1043 err = snd_pcm_plug_alloc(substream, oss_period_size); 1044 if (err < 0) 1045 goto failure; 1046 } 1047 #endif 1048 oss_period_size = array_size(oss_period_size, oss_frame_size); 1049 oss_buffer_size = array_size(oss_period_size, runtime->oss.periods); 1050 if (oss_buffer_size <= 0) { 1051 err = -EINVAL; 1052 goto failure; 1053 } 1054 1055 runtime->oss.period_bytes = oss_period_size; 1056 runtime->oss.buffer_bytes = oss_buffer_size; 1057 1058 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1059 runtime->oss.period_bytes, 1060 runtime->oss.buffer_bytes); 1061 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1062 params_period_size(sparams), 1063 params_buffer_size(sparams)); 1064 1065 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1066 runtime->oss.channels = params_channels(params); 1067 runtime->oss.rate = params_rate(params); 1068 1069 kvfree(runtime->oss.buffer); 1070 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL); 1071 if (!runtime->oss.buffer) { 1072 err = -ENOMEM; 1073 goto failure; 1074 } 1075 1076 runtime->oss.params = 0; 1077 runtime->oss.prepare = 1; 1078 runtime->oss.buffer_used = 0; 1079 err = snd_pcm_runtime_buffer_set_silence(runtime); 1080 if (err < 0) 1081 goto failure; 1082 1083 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1084 1085 err = 0; 1086 failure: 1087 if (err) 1088 snd_pcm_oss_release_buffers(substream); 1089 kfree(sw_params); 1090 kfree(params); 1091 kfree(sparams); 1092 return err; 1093 } 1094 1095 /* this one takes the lock by itself */ 1096 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 1097 bool trylock) 1098 { 1099 struct snd_pcm_runtime *runtime = substream->runtime; 1100 int err; 1101 1102 if (trylock) { 1103 if (!(mutex_trylock(&runtime->oss.params_lock))) 1104 return -EAGAIN; 1105 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1106 return -ERESTARTSYS; 1107 1108 err = snd_pcm_oss_change_params_locked(substream); 1109 mutex_unlock(&runtime->oss.params_lock); 1110 return err; 1111 } 1112 1113 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1114 { 1115 int idx, err; 1116 struct snd_pcm_substream *asubstream = NULL, *substream; 1117 1118 for (idx = 0; idx < 2; idx++) { 1119 substream = pcm_oss_file->streams[idx]; 1120 if (substream == NULL) 1121 continue; 1122 if (asubstream == NULL) 1123 asubstream = substream; 1124 if (substream->runtime->oss.params) { 1125 err = snd_pcm_oss_change_params(substream, false); 1126 if (err < 0) 1127 return err; 1128 } 1129 } 1130 if (!asubstream) 1131 return -EIO; 1132 if (r_substream) 1133 *r_substream = asubstream; 1134 return 0; 1135 } 1136 1137 /* call with params_lock held */ 1138 /* NOTE: this always call PREPARE unconditionally no matter whether 1139 * runtime->oss.prepare is set or not 1140 */ 1141 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1142 { 1143 int err; 1144 struct snd_pcm_runtime *runtime = substream->runtime; 1145 1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1147 if (err < 0) { 1148 pcm_dbg(substream->pcm, 1149 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1150 return err; 1151 } 1152 runtime->oss.prepare = 0; 1153 runtime->oss.prev_hw_ptr_period = 0; 1154 runtime->oss.period_ptr = 0; 1155 runtime->oss.buffer_used = 0; 1156 1157 return 0; 1158 } 1159 1160 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1161 { 1162 struct snd_pcm_runtime *runtime; 1163 int err; 1164 1165 runtime = substream->runtime; 1166 if (runtime->oss.params) { 1167 err = snd_pcm_oss_change_params(substream, false); 1168 if (err < 0) 1169 return err; 1170 } 1171 if (runtime->oss.prepare) { 1172 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1173 return -ERESTARTSYS; 1174 err = snd_pcm_oss_prepare(substream); 1175 mutex_unlock(&runtime->oss.params_lock); 1176 if (err < 0) 1177 return err; 1178 } 1179 return 0; 1180 } 1181 1182 /* call with params_lock held */ 1183 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) 1184 { 1185 struct snd_pcm_runtime *runtime; 1186 int err; 1187 1188 runtime = substream->runtime; 1189 if (runtime->oss.params) { 1190 err = snd_pcm_oss_change_params_locked(substream); 1191 if (err < 0) 1192 return err; 1193 } 1194 if (runtime->oss.prepare) { 1195 err = snd_pcm_oss_prepare(substream); 1196 if (err < 0) 1197 return err; 1198 } 1199 return 0; 1200 } 1201 1202 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1203 { 1204 struct snd_pcm_runtime *runtime; 1205 snd_pcm_uframes_t frames; 1206 int err = 0; 1207 1208 while (1) { 1209 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1210 if (err < 0) 1211 break; 1212 runtime = substream->runtime; 1213 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1214 break; 1215 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1216 /* until avail(delay) <= buffer_size */ 1217 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1218 frames /= runtime->period_size; 1219 frames *= runtime->period_size; 1220 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1221 if (err < 0) 1222 break; 1223 } 1224 return err; 1225 } 1226 1227 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1228 { 1229 struct snd_pcm_runtime *runtime = substream->runtime; 1230 int ret; 1231 while (1) { 1232 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1233 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1234 #ifdef OSS_DEBUG 1235 pcm_dbg(substream->pcm, 1236 "pcm_oss: write: recovering from %s\n", 1237 runtime->state == SNDRV_PCM_STATE_XRUN ? 1238 "XRUN" : "SUSPEND"); 1239 #endif 1240 ret = snd_pcm_oss_prepare(substream); 1241 if (ret < 0) 1242 break; 1243 } 1244 mutex_unlock(&runtime->oss.params_lock); 1245 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1246 frames, in_kernel); 1247 mutex_lock(&runtime->oss.params_lock); 1248 if (ret != -EPIPE && ret != -ESTRPIPE) 1249 break; 1250 /* test, if we can't store new data, because the stream */ 1251 /* has not been started */ 1252 if (runtime->state == SNDRV_PCM_STATE_PREPARED) 1253 return -EAGAIN; 1254 } 1255 return ret; 1256 } 1257 1258 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1259 { 1260 struct snd_pcm_runtime *runtime = substream->runtime; 1261 snd_pcm_sframes_t delay; 1262 int ret; 1263 while (1) { 1264 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1265 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1266 #ifdef OSS_DEBUG 1267 pcm_dbg(substream->pcm, 1268 "pcm_oss: read: recovering from %s\n", 1269 runtime->state == SNDRV_PCM_STATE_XRUN ? 1270 "XRUN" : "SUSPEND"); 1271 #endif 1272 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1273 if (ret < 0) 1274 break; 1275 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { 1276 ret = snd_pcm_oss_prepare(substream); 1277 if (ret < 0) 1278 break; 1279 } 1280 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1281 if (ret < 0) 1282 break; 1283 mutex_unlock(&runtime->oss.params_lock); 1284 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1285 frames, in_kernel); 1286 mutex_lock(&runtime->oss.params_lock); 1287 if (ret == -EPIPE) { 1288 if (runtime->state == SNDRV_PCM_STATE_DRAINING) { 1289 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1290 if (ret < 0) 1291 break; 1292 } 1293 continue; 1294 } 1295 if (ret != -ESTRPIPE) 1296 break; 1297 } 1298 return ret; 1299 } 1300 1301 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1302 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1303 { 1304 struct snd_pcm_runtime *runtime = substream->runtime; 1305 int ret; 1306 while (1) { 1307 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1308 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1309 #ifdef OSS_DEBUG 1310 pcm_dbg(substream->pcm, 1311 "pcm_oss: writev: recovering from %s\n", 1312 runtime->state == SNDRV_PCM_STATE_XRUN ? 1313 "XRUN" : "SUSPEND"); 1314 #endif 1315 ret = snd_pcm_oss_prepare(substream); 1316 if (ret < 0) 1317 break; 1318 } 1319 ret = snd_pcm_kernel_writev(substream, bufs, frames); 1320 if (ret != -EPIPE && ret != -ESTRPIPE) 1321 break; 1322 1323 /* test, if we can't store new data, because the stream */ 1324 /* has not been started */ 1325 if (runtime->state == SNDRV_PCM_STATE_PREPARED) 1326 return -EAGAIN; 1327 } 1328 return ret; 1329 } 1330 1331 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1332 { 1333 struct snd_pcm_runtime *runtime = substream->runtime; 1334 int ret; 1335 while (1) { 1336 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1337 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1338 #ifdef OSS_DEBUG 1339 pcm_dbg(substream->pcm, 1340 "pcm_oss: readv: recovering from %s\n", 1341 runtime->state == SNDRV_PCM_STATE_XRUN ? 1342 "XRUN" : "SUSPEND"); 1343 #endif 1344 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1345 if (ret < 0) 1346 break; 1347 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { 1348 ret = snd_pcm_oss_prepare(substream); 1349 if (ret < 0) 1350 break; 1351 } 1352 ret = snd_pcm_kernel_readv(substream, bufs, frames); 1353 if (ret != -EPIPE && ret != -ESTRPIPE) 1354 break; 1355 } 1356 return ret; 1357 } 1358 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 1359 1360 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1361 { 1362 struct snd_pcm_runtime *runtime = substream->runtime; 1363 snd_pcm_sframes_t frames, frames1; 1364 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1365 if (runtime->oss.plugin_first) { 1366 struct snd_pcm_plugin_channel *channels; 1367 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1368 if (!in_kernel) { 1369 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1370 return -EFAULT; 1371 buf = runtime->oss.buffer; 1372 } 1373 frames = bytes / oss_frame_bytes; 1374 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1375 if (frames1 < 0) 1376 return frames1; 1377 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1378 if (frames1 <= 0) 1379 return frames1; 1380 bytes = frames1 * oss_frame_bytes; 1381 } else 1382 #endif 1383 { 1384 frames = bytes_to_frames(runtime, bytes); 1385 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1386 if (frames1 <= 0) 1387 return frames1; 1388 bytes = frames_to_bytes(runtime, frames1); 1389 } 1390 return bytes; 1391 } 1392 1393 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1394 { 1395 size_t xfer = 0; 1396 ssize_t tmp = 0; 1397 struct snd_pcm_runtime *runtime = substream->runtime; 1398 1399 if (atomic_read(&substream->mmap_count)) 1400 return -ENXIO; 1401 1402 atomic_inc(&runtime->oss.rw_ref); 1403 while (bytes > 0) { 1404 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1405 tmp = -ERESTARTSYS; 1406 break; 1407 } 1408 tmp = snd_pcm_oss_make_ready_locked(substream); 1409 if (tmp < 0) 1410 goto err; 1411 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1412 tmp = bytes; 1413 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1414 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1415 if (tmp > 0) { 1416 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1417 tmp = -EFAULT; 1418 goto err; 1419 } 1420 } 1421 runtime->oss.buffer_used += tmp; 1422 buf += tmp; 1423 bytes -= tmp; 1424 xfer += tmp; 1425 if (substream->oss.setup.partialfrag || 1426 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1427 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1428 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1429 if (tmp <= 0) 1430 goto err; 1431 runtime->oss.bytes += tmp; 1432 runtime->oss.period_ptr += tmp; 1433 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1434 if (runtime->oss.period_ptr == 0 || 1435 runtime->oss.period_ptr == runtime->oss.buffer_used) 1436 runtime->oss.buffer_used = 0; 1437 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1438 tmp = -EAGAIN; 1439 goto err; 1440 } 1441 } 1442 } else { 1443 tmp = snd_pcm_oss_write2(substream, 1444 (const char __force *)buf, 1445 runtime->oss.period_bytes, 0); 1446 if (tmp <= 0) 1447 goto err; 1448 runtime->oss.bytes += tmp; 1449 buf += tmp; 1450 bytes -= tmp; 1451 xfer += tmp; 1452 if ((substream->f_flags & O_NONBLOCK) != 0 && 1453 tmp != runtime->oss.period_bytes) 1454 tmp = -EAGAIN; 1455 } 1456 err: 1457 mutex_unlock(&runtime->oss.params_lock); 1458 if (tmp < 0) 1459 break; 1460 if (signal_pending(current)) { 1461 tmp = -ERESTARTSYS; 1462 break; 1463 } 1464 tmp = 0; 1465 } 1466 atomic_dec(&runtime->oss.rw_ref); 1467 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1468 } 1469 1470 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1471 { 1472 struct snd_pcm_runtime *runtime = substream->runtime; 1473 snd_pcm_sframes_t frames, frames1; 1474 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1475 char __user *final_dst = (char __force __user *)buf; 1476 if (runtime->oss.plugin_first) { 1477 struct snd_pcm_plugin_channel *channels; 1478 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1479 if (!in_kernel) 1480 buf = runtime->oss.buffer; 1481 frames = bytes / oss_frame_bytes; 1482 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1483 if (frames1 < 0) 1484 return frames1; 1485 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1486 if (frames1 <= 0) 1487 return frames1; 1488 bytes = frames1 * oss_frame_bytes; 1489 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1490 return -EFAULT; 1491 } else 1492 #endif 1493 { 1494 frames = bytes_to_frames(runtime, bytes); 1495 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1496 if (frames1 <= 0) 1497 return frames1; 1498 bytes = frames_to_bytes(runtime, frames1); 1499 } 1500 return bytes; 1501 } 1502 1503 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1504 { 1505 size_t xfer = 0; 1506 ssize_t tmp = 0; 1507 struct snd_pcm_runtime *runtime = substream->runtime; 1508 1509 if (atomic_read(&substream->mmap_count)) 1510 return -ENXIO; 1511 1512 atomic_inc(&runtime->oss.rw_ref); 1513 while (bytes > 0) { 1514 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1515 tmp = -ERESTARTSYS; 1516 break; 1517 } 1518 tmp = snd_pcm_oss_make_ready_locked(substream); 1519 if (tmp < 0) 1520 goto err; 1521 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1522 if (runtime->oss.buffer_used == 0) { 1523 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1524 if (tmp <= 0) 1525 goto err; 1526 runtime->oss.bytes += tmp; 1527 runtime->oss.period_ptr = tmp; 1528 runtime->oss.buffer_used = tmp; 1529 } 1530 tmp = bytes; 1531 if ((size_t) tmp > runtime->oss.buffer_used) 1532 tmp = runtime->oss.buffer_used; 1533 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1534 tmp = -EFAULT; 1535 goto err; 1536 } 1537 buf += tmp; 1538 bytes -= tmp; 1539 xfer += tmp; 1540 runtime->oss.buffer_used -= tmp; 1541 } else { 1542 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1543 runtime->oss.period_bytes, 0); 1544 if (tmp <= 0) 1545 goto err; 1546 runtime->oss.bytes += tmp; 1547 buf += tmp; 1548 bytes -= tmp; 1549 xfer += tmp; 1550 } 1551 err: 1552 mutex_unlock(&runtime->oss.params_lock); 1553 if (tmp < 0) 1554 break; 1555 if (signal_pending(current)) { 1556 tmp = -ERESTARTSYS; 1557 break; 1558 } 1559 tmp = 0; 1560 } 1561 atomic_dec(&runtime->oss.rw_ref); 1562 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1563 } 1564 1565 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1566 { 1567 struct snd_pcm_substream *substream; 1568 struct snd_pcm_runtime *runtime; 1569 int i; 1570 1571 for (i = 0; i < 2; i++) { 1572 substream = pcm_oss_file->streams[i]; 1573 if (!substream) 1574 continue; 1575 runtime = substream->runtime; 1576 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1577 mutex_lock(&runtime->oss.params_lock); 1578 runtime->oss.prepare = 1; 1579 runtime->oss.buffer_used = 0; 1580 runtime->oss.prev_hw_ptr_period = 0; 1581 runtime->oss.period_ptr = 0; 1582 mutex_unlock(&runtime->oss.params_lock); 1583 } 1584 return 0; 1585 } 1586 1587 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1588 { 1589 struct snd_pcm_substream *substream; 1590 int err; 1591 1592 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1593 if (substream != NULL) { 1594 err = snd_pcm_oss_make_ready(substream); 1595 if (err < 0) 1596 return err; 1597 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1598 } 1599 /* note: all errors from the start action are ignored */ 1600 /* OSS apps do not know, how to handle them */ 1601 return 0; 1602 } 1603 1604 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1605 { 1606 struct snd_pcm_runtime *runtime; 1607 ssize_t result = 0; 1608 snd_pcm_state_t state; 1609 long res; 1610 wait_queue_entry_t wait; 1611 1612 runtime = substream->runtime; 1613 init_waitqueue_entry(&wait, current); 1614 add_wait_queue(&runtime->sleep, &wait); 1615 #ifdef OSS_DEBUG 1616 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1617 #endif 1618 while (1) { 1619 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1620 if (result > 0) { 1621 runtime->oss.buffer_used = 0; 1622 result = 0; 1623 break; 1624 } 1625 if (result != 0 && result != -EAGAIN) 1626 break; 1627 result = 0; 1628 set_current_state(TASK_INTERRUPTIBLE); 1629 scoped_guard(pcm_stream_lock_irq, substream) 1630 state = runtime->state; 1631 if (state != SNDRV_PCM_STATE_RUNNING) { 1632 set_current_state(TASK_RUNNING); 1633 break; 1634 } 1635 res = schedule_timeout(10 * HZ); 1636 if (signal_pending(current)) { 1637 result = -ERESTARTSYS; 1638 break; 1639 } 1640 if (res == 0) { 1641 pcm_err(substream->pcm, 1642 "OSS sync error - DMA timeout\n"); 1643 result = -EIO; 1644 break; 1645 } 1646 } 1647 remove_wait_queue(&runtime->sleep, &wait); 1648 return result; 1649 } 1650 1651 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1652 { 1653 int err = 0; 1654 unsigned int saved_f_flags; 1655 struct snd_pcm_substream *substream; 1656 struct snd_pcm_runtime *runtime; 1657 snd_pcm_format_t format; 1658 unsigned long width; 1659 size_t size; 1660 1661 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1662 if (substream != NULL) { 1663 runtime = substream->runtime; 1664 if (atomic_read(&substream->mmap_count)) 1665 goto __direct; 1666 atomic_inc(&runtime->oss.rw_ref); 1667 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1668 atomic_dec(&runtime->oss.rw_ref); 1669 return -ERESTARTSYS; 1670 } 1671 err = snd_pcm_oss_make_ready_locked(substream); 1672 if (err < 0) 1673 goto unlock; 1674 format = snd_pcm_oss_format_from(runtime->oss.format); 1675 width = snd_pcm_format_physical_width(format); 1676 if (runtime->oss.buffer_used > 0) { 1677 #ifdef OSS_DEBUG 1678 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1679 #endif 1680 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1681 snd_pcm_format_set_silence(format, 1682 runtime->oss.buffer + runtime->oss.buffer_used, 1683 size); 1684 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1685 if (err < 0) 1686 goto unlock; 1687 } else if (runtime->oss.period_ptr > 0) { 1688 #ifdef OSS_DEBUG 1689 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1690 #endif 1691 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1692 snd_pcm_format_set_silence(format, 1693 runtime->oss.buffer, 1694 size * 8 / width); 1695 err = snd_pcm_oss_sync1(substream, size); 1696 if (err < 0) 1697 goto unlock; 1698 } 1699 /* 1700 * The ALSA's period might be a bit large than OSS one. 1701 * Fill the remain portion of ALSA period with zeros. 1702 */ 1703 size = runtime->control->appl_ptr % runtime->period_size; 1704 if (size > 0) { 1705 size = runtime->period_size - size; 1706 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) 1707 snd_pcm_lib_write(substream, NULL, size); 1708 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 1709 snd_pcm_lib_writev(substream, NULL, size); 1710 } 1711 unlock: 1712 mutex_unlock(&runtime->oss.params_lock); 1713 atomic_dec(&runtime->oss.rw_ref); 1714 if (err < 0) 1715 return err; 1716 /* 1717 * finish sync: drain the buffer 1718 */ 1719 __direct: 1720 saved_f_flags = substream->f_flags; 1721 substream->f_flags &= ~O_NONBLOCK; 1722 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1723 substream->f_flags = saved_f_flags; 1724 if (err < 0) 1725 return err; 1726 mutex_lock(&runtime->oss.params_lock); 1727 runtime->oss.prepare = 1; 1728 mutex_unlock(&runtime->oss.params_lock); 1729 } 1730 1731 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1732 if (substream != NULL) { 1733 err = snd_pcm_oss_make_ready(substream); 1734 if (err < 0) 1735 return err; 1736 runtime = substream->runtime; 1737 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1738 if (err < 0) 1739 return err; 1740 mutex_lock(&runtime->oss.params_lock); 1741 runtime->oss.buffer_used = 0; 1742 runtime->oss.prepare = 1; 1743 mutex_unlock(&runtime->oss.params_lock); 1744 } 1745 return 0; 1746 } 1747 1748 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1749 { 1750 int idx; 1751 1752 for (idx = 1; idx >= 0; --idx) { 1753 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1754 struct snd_pcm_runtime *runtime; 1755 int err; 1756 1757 if (substream == NULL) 1758 continue; 1759 runtime = substream->runtime; 1760 if (rate < 1000) 1761 rate = 1000; 1762 else if (rate > 192000) 1763 rate = 192000; 1764 err = lock_params(runtime); 1765 if (err < 0) 1766 return err; 1767 if (runtime->oss.rate != rate) { 1768 runtime->oss.params = 1; 1769 runtime->oss.rate = rate; 1770 } 1771 unlock_params(runtime); 1772 } 1773 return snd_pcm_oss_get_rate(pcm_oss_file); 1774 } 1775 1776 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1777 { 1778 struct snd_pcm_substream *substream; 1779 int err; 1780 1781 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1782 if (err < 0) 1783 return err; 1784 return substream->runtime->oss.rate; 1785 } 1786 1787 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1788 { 1789 int idx; 1790 if (channels < 1) 1791 channels = 1; 1792 if (channels > 128) 1793 return -EINVAL; 1794 for (idx = 1; idx >= 0; --idx) { 1795 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1796 struct snd_pcm_runtime *runtime; 1797 int err; 1798 1799 if (substream == NULL) 1800 continue; 1801 runtime = substream->runtime; 1802 err = lock_params(runtime); 1803 if (err < 0) 1804 return err; 1805 if (runtime->oss.channels != channels) { 1806 runtime->oss.params = 1; 1807 runtime->oss.channels = channels; 1808 } 1809 unlock_params(runtime); 1810 } 1811 return snd_pcm_oss_get_channels(pcm_oss_file); 1812 } 1813 1814 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1815 { 1816 struct snd_pcm_substream *substream; 1817 int err; 1818 1819 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1820 if (err < 0) 1821 return err; 1822 return substream->runtime->oss.channels; 1823 } 1824 1825 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1826 { 1827 struct snd_pcm_substream *substream; 1828 int err; 1829 1830 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1831 if (err < 0) 1832 return err; 1833 return substream->runtime->oss.period_bytes; 1834 } 1835 1836 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1837 { 1838 struct snd_pcm_substream *substream; 1839 int err; 1840 int direct; 1841 unsigned int formats = 0; 1842 const struct snd_mask *format_mask; 1843 int fmt; 1844 1845 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1846 if (err < 0) 1847 return err; 1848 if (atomic_read(&substream->mmap_count)) 1849 direct = 1; 1850 else 1851 direct = substream->oss.setup.direct; 1852 if (!direct) 1853 return AFMT_MU_LAW | AFMT_U8 | 1854 AFMT_S16_LE | AFMT_S16_BE | 1855 AFMT_S8 | AFMT_U16_LE | 1856 AFMT_U16_BE | 1857 AFMT_S32_LE | AFMT_S32_BE | 1858 AFMT_S24_LE | AFMT_S24_BE | 1859 AFMT_S24_PACKED; 1860 1861 struct snd_pcm_hw_params *params __free(kfree) = 1862 kmalloc(sizeof(*params), GFP_KERNEL); 1863 if (!params) 1864 return -ENOMEM; 1865 _snd_pcm_hw_params_any(params); 1866 err = snd_pcm_hw_refine(substream, params); 1867 if (err < 0) 1868 return err; 1869 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); 1870 for (fmt = 0; fmt < 32; ++fmt) { 1871 if (snd_mask_test(format_mask, fmt)) { 1872 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); 1873 if (f >= 0) 1874 formats |= f; 1875 } 1876 } 1877 1878 return formats; 1879 } 1880 1881 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1882 { 1883 int formats, idx; 1884 int err; 1885 1886 if (format != AFMT_QUERY) { 1887 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1888 if (formats < 0) 1889 return formats; 1890 if (!(formats & format)) 1891 format = AFMT_U8; 1892 for (idx = 1; idx >= 0; --idx) { 1893 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1894 struct snd_pcm_runtime *runtime; 1895 if (substream == NULL) 1896 continue; 1897 runtime = substream->runtime; 1898 err = lock_params(runtime); 1899 if (err < 0) 1900 return err; 1901 if (runtime->oss.format != format) { 1902 runtime->oss.params = 1; 1903 runtime->oss.format = format; 1904 } 1905 unlock_params(runtime); 1906 } 1907 } 1908 return snd_pcm_oss_get_format(pcm_oss_file); 1909 } 1910 1911 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1912 { 1913 struct snd_pcm_substream *substream; 1914 int err; 1915 1916 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1917 if (err < 0) 1918 return err; 1919 return substream->runtime->oss.format; 1920 } 1921 1922 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1923 { 1924 struct snd_pcm_runtime *runtime; 1925 1926 runtime = substream->runtime; 1927 if (subdivide == 0) { 1928 subdivide = runtime->oss.subdivision; 1929 if (subdivide == 0) 1930 subdivide = 1; 1931 return subdivide; 1932 } 1933 if (runtime->oss.subdivision || runtime->oss.fragshift) 1934 return -EINVAL; 1935 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1936 subdivide != 8 && subdivide != 16) 1937 return -EINVAL; 1938 runtime->oss.subdivision = subdivide; 1939 runtime->oss.params = 1; 1940 return subdivide; 1941 } 1942 1943 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1944 { 1945 int err = -EINVAL, idx; 1946 1947 for (idx = 1; idx >= 0; --idx) { 1948 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1949 struct snd_pcm_runtime *runtime; 1950 1951 if (substream == NULL) 1952 continue; 1953 runtime = substream->runtime; 1954 err = lock_params(runtime); 1955 if (err < 0) 1956 return err; 1957 err = snd_pcm_oss_set_subdivide1(substream, subdivide); 1958 unlock_params(runtime); 1959 if (err < 0) 1960 return err; 1961 } 1962 return err; 1963 } 1964 1965 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1966 { 1967 struct snd_pcm_runtime *runtime; 1968 int fragshift; 1969 1970 runtime = substream->runtime; 1971 if (runtime->oss.subdivision || runtime->oss.fragshift) 1972 return -EINVAL; 1973 fragshift = val & 0xffff; 1974 if (fragshift >= 25) /* should be large enough */ 1975 return -EINVAL; 1976 runtime->oss.fragshift = fragshift; 1977 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1978 if (runtime->oss.fragshift < 4) /* < 16 */ 1979 runtime->oss.fragshift = 4; 1980 if (runtime->oss.maxfrags < 2) 1981 runtime->oss.maxfrags = 2; 1982 runtime->oss.params = 1; 1983 return 0; 1984 } 1985 1986 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1987 { 1988 int err = -EINVAL, idx; 1989 1990 for (idx = 1; idx >= 0; --idx) { 1991 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1992 struct snd_pcm_runtime *runtime; 1993 1994 if (substream == NULL) 1995 continue; 1996 runtime = substream->runtime; 1997 err = lock_params(runtime); 1998 if (err < 0) 1999 return err; 2000 err = snd_pcm_oss_set_fragment1(substream, val); 2001 unlock_params(runtime); 2002 if (err < 0) 2003 return err; 2004 } 2005 return err; 2006 } 2007 2008 static int snd_pcm_oss_nonblock(struct file * file) 2009 { 2010 guard(spinlock)(&file->f_lock); 2011 file->f_flags |= O_NONBLOCK; 2012 return 0; 2013 } 2014 2015 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 2016 { 2017 2018 if (substream == NULL) { 2019 res &= ~DSP_CAP_DUPLEX; 2020 return res; 2021 } 2022 #ifdef DSP_CAP_MULTI 2023 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2024 if (substream->pstr->substream_count > 1) 2025 res |= DSP_CAP_MULTI; 2026 #endif 2027 /* DSP_CAP_REALTIME is set all times: */ 2028 /* all ALSA drivers can return actual pointer in ring buffer */ 2029 #if defined(DSP_CAP_REALTIME) && 0 2030 { 2031 struct snd_pcm_runtime *runtime = substream->runtime; 2032 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 2033 res &= ~DSP_CAP_REALTIME; 2034 } 2035 #endif 2036 return res; 2037 } 2038 2039 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 2040 { 2041 int result, idx; 2042 2043 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 2044 for (idx = 0; idx < 2; idx++) { 2045 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 2046 result = snd_pcm_oss_get_caps1(substream, result); 2047 } 2048 result |= 0x0001; /* revision - same as SB AWE 64 */ 2049 return result; 2050 } 2051 2052 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 2053 snd_pcm_uframes_t hw_ptr) 2054 { 2055 struct snd_pcm_runtime *runtime = substream->runtime; 2056 snd_pcm_uframes_t appl_ptr; 2057 appl_ptr = hw_ptr + runtime->buffer_size; 2058 appl_ptr %= runtime->boundary; 2059 runtime->control->appl_ptr = appl_ptr; 2060 } 2061 2062 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 2063 { 2064 struct snd_pcm_runtime *runtime; 2065 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2066 int err, cmd; 2067 2068 #ifdef OSS_DEBUG 2069 pr_debug("pcm_oss: trigger = 0x%x\n", trigger); 2070 #endif 2071 2072 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2073 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2074 2075 if (psubstream) { 2076 err = snd_pcm_oss_make_ready(psubstream); 2077 if (err < 0) 2078 return err; 2079 } 2080 if (csubstream) { 2081 err = snd_pcm_oss_make_ready(csubstream); 2082 if (err < 0) 2083 return err; 2084 } 2085 if (psubstream) { 2086 runtime = psubstream->runtime; 2087 cmd = 0; 2088 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2089 return -ERESTARTSYS; 2090 if (trigger & PCM_ENABLE_OUTPUT) { 2091 if (runtime->oss.trigger) 2092 goto _skip1; 2093 if (atomic_read(&psubstream->mmap_count)) 2094 snd_pcm_oss_simulate_fill(psubstream, 2095 get_hw_ptr_period(runtime)); 2096 runtime->oss.trigger = 1; 2097 runtime->start_threshold = 1; 2098 cmd = SNDRV_PCM_IOCTL_START; 2099 } else { 2100 if (!runtime->oss.trigger) 2101 goto _skip1; 2102 runtime->oss.trigger = 0; 2103 runtime->start_threshold = runtime->boundary; 2104 cmd = SNDRV_PCM_IOCTL_DROP; 2105 runtime->oss.prepare = 1; 2106 } 2107 _skip1: 2108 mutex_unlock(&runtime->oss.params_lock); 2109 if (cmd) { 2110 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2111 if (err < 0) 2112 return err; 2113 } 2114 } 2115 if (csubstream) { 2116 runtime = csubstream->runtime; 2117 cmd = 0; 2118 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2119 return -ERESTARTSYS; 2120 if (trigger & PCM_ENABLE_INPUT) { 2121 if (runtime->oss.trigger) 2122 goto _skip2; 2123 runtime->oss.trigger = 1; 2124 runtime->start_threshold = 1; 2125 cmd = SNDRV_PCM_IOCTL_START; 2126 } else { 2127 if (!runtime->oss.trigger) 2128 goto _skip2; 2129 runtime->oss.trigger = 0; 2130 runtime->start_threshold = runtime->boundary; 2131 cmd = SNDRV_PCM_IOCTL_DROP; 2132 runtime->oss.prepare = 1; 2133 } 2134 _skip2: 2135 mutex_unlock(&runtime->oss.params_lock); 2136 if (cmd) { 2137 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2138 if (err < 0) 2139 return err; 2140 } 2141 } 2142 return 0; 2143 } 2144 2145 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2146 { 2147 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2148 int result = 0; 2149 2150 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2151 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2152 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2153 result |= PCM_ENABLE_OUTPUT; 2154 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2155 result |= PCM_ENABLE_INPUT; 2156 return result; 2157 } 2158 2159 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2160 { 2161 struct snd_pcm_substream *substream; 2162 struct snd_pcm_runtime *runtime; 2163 snd_pcm_sframes_t delay; 2164 int err; 2165 2166 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2167 if (substream == NULL) 2168 return -EINVAL; 2169 err = snd_pcm_oss_make_ready(substream); 2170 if (err < 0) 2171 return err; 2172 runtime = substream->runtime; 2173 if (runtime->oss.params || runtime->oss.prepare) 2174 return 0; 2175 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2176 if (err == -EPIPE) 2177 delay = 0; /* hack for broken OSS applications */ 2178 else if (err < 0) 2179 return err; 2180 return snd_pcm_oss_bytes(substream, delay); 2181 } 2182 2183 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2184 { 2185 struct snd_pcm_substream *substream; 2186 struct snd_pcm_runtime *runtime; 2187 snd_pcm_sframes_t delay; 2188 int fixup; 2189 struct count_info info; 2190 int err; 2191 2192 if (_info == NULL) 2193 return -EFAULT; 2194 substream = pcm_oss_file->streams[stream]; 2195 if (substream == NULL) 2196 return -EINVAL; 2197 err = snd_pcm_oss_make_ready(substream); 2198 if (err < 0) 2199 return err; 2200 runtime = substream->runtime; 2201 if (runtime->oss.params || runtime->oss.prepare) { 2202 memset(&info, 0, sizeof(info)); 2203 if (copy_to_user(_info, &info, sizeof(info))) 2204 return -EFAULT; 2205 return 0; 2206 } 2207 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2208 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2209 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2210 err = 0; 2211 delay = 0; 2212 fixup = 0; 2213 } else { 2214 fixup = runtime->oss.buffer_used; 2215 } 2216 } else { 2217 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2218 fixup = -runtime->oss.buffer_used; 2219 } 2220 if (err < 0) 2221 return err; 2222 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2223 if (atomic_read(&substream->mmap_count)) { 2224 snd_pcm_sframes_t n; 2225 delay = get_hw_ptr_period(runtime); 2226 n = delay - runtime->oss.prev_hw_ptr_period; 2227 if (n < 0) 2228 n += runtime->boundary; 2229 info.blocks = n / runtime->period_size; 2230 runtime->oss.prev_hw_ptr_period = delay; 2231 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2232 snd_pcm_oss_simulate_fill(substream, delay); 2233 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2234 } else { 2235 delay = snd_pcm_oss_bytes(substream, delay); 2236 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2237 if (substream->oss.setup.buggyptr) 2238 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2239 else 2240 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2241 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2242 } else { 2243 delay += fixup; 2244 info.blocks = delay / runtime->oss.period_bytes; 2245 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2246 } 2247 } 2248 if (copy_to_user(_info, &info, sizeof(info))) 2249 return -EFAULT; 2250 return 0; 2251 } 2252 2253 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2254 { 2255 struct snd_pcm_substream *substream; 2256 struct snd_pcm_runtime *runtime; 2257 snd_pcm_sframes_t avail; 2258 int fixup; 2259 struct audio_buf_info info; 2260 int err; 2261 2262 if (_info == NULL) 2263 return -EFAULT; 2264 substream = pcm_oss_file->streams[stream]; 2265 if (substream == NULL) 2266 return -EINVAL; 2267 runtime = substream->runtime; 2268 2269 if (runtime->oss.params) { 2270 err = snd_pcm_oss_change_params(substream, false); 2271 if (err < 0) 2272 return err; 2273 } 2274 2275 info.fragsize = runtime->oss.period_bytes; 2276 info.fragstotal = runtime->periods; 2277 if (runtime->oss.prepare) { 2278 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2279 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2280 info.fragments = runtime->oss.periods; 2281 } else { 2282 info.bytes = 0; 2283 info.fragments = 0; 2284 } 2285 } else { 2286 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2287 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2288 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2289 avail = runtime->buffer_size; 2290 err = 0; 2291 fixup = 0; 2292 } else { 2293 avail = runtime->buffer_size - avail; 2294 fixup = -runtime->oss.buffer_used; 2295 } 2296 } else { 2297 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2298 fixup = runtime->oss.buffer_used; 2299 } 2300 if (err < 0) 2301 return err; 2302 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2303 info.fragments = info.bytes / runtime->oss.period_bytes; 2304 } 2305 2306 #ifdef OSS_DEBUG 2307 pcm_dbg(substream->pcm, 2308 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2309 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2310 #endif 2311 if (copy_to_user(_info, &info, sizeof(info))) 2312 return -EFAULT; 2313 return 0; 2314 } 2315 2316 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2317 { 2318 // it won't be probably implemented 2319 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2320 return -EINVAL; 2321 } 2322 2323 static const char *strip_task_path(const char *path) 2324 { 2325 const char *ptr, *ptrl = NULL; 2326 for (ptr = path; *ptr; ptr++) { 2327 if (*ptr == '/') 2328 ptrl = ptr + 1; 2329 } 2330 return ptrl; 2331 } 2332 2333 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2334 const char *task_name, 2335 struct snd_pcm_oss_setup *rsetup) 2336 { 2337 struct snd_pcm_oss_setup *setup; 2338 2339 guard(mutex)(&pcm->streams[stream].oss.setup_mutex); 2340 do { 2341 for (setup = pcm->streams[stream].oss.setup_list; setup; 2342 setup = setup->next) { 2343 if (!strcmp(setup->task_name, task_name)) 2344 goto out; 2345 } 2346 } while ((task_name = strip_task_path(task_name)) != NULL); 2347 out: 2348 if (setup) 2349 *rsetup = *setup; 2350 } 2351 2352 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2353 { 2354 snd_pcm_oss_release_buffers(substream); 2355 substream->oss.oss = 0; 2356 } 2357 2358 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2359 struct snd_pcm_oss_setup *setup, 2360 int minor) 2361 { 2362 struct snd_pcm_runtime *runtime; 2363 2364 substream->oss.oss = 1; 2365 substream->oss.setup = *setup; 2366 if (setup->nonblock) 2367 substream->f_flags |= O_NONBLOCK; 2368 else if (setup->block) 2369 substream->f_flags &= ~O_NONBLOCK; 2370 runtime = substream->runtime; 2371 runtime->oss.params = 1; 2372 runtime->oss.trigger = 1; 2373 runtime->oss.rate = 8000; 2374 mutex_init(&runtime->oss.params_lock); 2375 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2376 case SNDRV_MINOR_OSS_PCM_8: 2377 runtime->oss.format = AFMT_U8; 2378 break; 2379 case SNDRV_MINOR_OSS_PCM_16: 2380 runtime->oss.format = AFMT_S16_LE; 2381 break; 2382 default: 2383 runtime->oss.format = AFMT_MU_LAW; 2384 } 2385 runtime->oss.channels = 1; 2386 runtime->oss.fragshift = 0; 2387 runtime->oss.maxfrags = 0; 2388 runtime->oss.subdivision = 0; 2389 substream->pcm_release = snd_pcm_oss_release_substream; 2390 atomic_set(&runtime->oss.rw_ref, 0); 2391 } 2392 2393 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2394 { 2395 int cidx; 2396 if (!pcm_oss_file) 2397 return 0; 2398 for (cidx = 0; cidx < 2; ++cidx) { 2399 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2400 if (substream) 2401 snd_pcm_release_substream(substream); 2402 } 2403 kfree(pcm_oss_file); 2404 return 0; 2405 } 2406 2407 static int snd_pcm_oss_open_file(struct file *file, 2408 struct snd_pcm *pcm, 2409 struct snd_pcm_oss_file **rpcm_oss_file, 2410 int minor, 2411 struct snd_pcm_oss_setup *setup) 2412 { 2413 int idx, err; 2414 struct snd_pcm_oss_file *pcm_oss_file; 2415 struct snd_pcm_substream *substream; 2416 fmode_t f_mode = file->f_mode; 2417 2418 if (rpcm_oss_file) 2419 *rpcm_oss_file = NULL; 2420 2421 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2422 if (pcm_oss_file == NULL) 2423 return -ENOMEM; 2424 2425 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2426 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2427 f_mode = FMODE_WRITE; 2428 2429 file->f_flags &= ~O_APPEND; 2430 for (idx = 0; idx < 2; idx++) { 2431 if (setup[idx].disable) 2432 continue; 2433 if (! pcm->streams[idx].substream_count) 2434 continue; /* no matching substream */ 2435 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2436 if (! (f_mode & FMODE_WRITE)) 2437 continue; 2438 } else { 2439 if (! (f_mode & FMODE_READ)) 2440 continue; 2441 } 2442 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2443 if (err < 0) { 2444 snd_pcm_oss_release_file(pcm_oss_file); 2445 return err; 2446 } 2447 2448 pcm_oss_file->streams[idx] = substream; 2449 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2450 } 2451 2452 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2453 snd_pcm_oss_release_file(pcm_oss_file); 2454 return -EINVAL; 2455 } 2456 2457 file->private_data = pcm_oss_file; 2458 if (rpcm_oss_file) 2459 *rpcm_oss_file = pcm_oss_file; 2460 return 0; 2461 } 2462 2463 2464 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2465 { 2466 unsigned int idx; 2467 2468 if (snd_BUG_ON(!task || !name || size < 2)) 2469 return -EINVAL; 2470 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2471 name[idx] = task->comm[idx]; 2472 name[idx] = '\0'; 2473 return 0; 2474 } 2475 2476 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2477 { 2478 int err; 2479 char task_name[32]; 2480 struct snd_pcm *pcm; 2481 struct snd_pcm_oss_file *pcm_oss_file; 2482 struct snd_pcm_oss_setup setup[2]; 2483 int nonblock; 2484 wait_queue_entry_t wait; 2485 2486 err = nonseekable_open(inode, file); 2487 if (err < 0) 2488 return err; 2489 2490 pcm = snd_lookup_oss_minor_data(iminor(inode), 2491 SNDRV_OSS_DEVICE_TYPE_PCM); 2492 if (pcm == NULL) { 2493 err = -ENODEV; 2494 goto __error1; 2495 } 2496 err = snd_card_file_add(pcm->card, file); 2497 if (err < 0) 2498 goto __error1; 2499 if (!try_module_get(pcm->card->module)) { 2500 err = -EFAULT; 2501 goto __error2; 2502 } 2503 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2504 err = -EFAULT; 2505 goto __error; 2506 } 2507 memset(setup, 0, sizeof(setup)); 2508 if (file->f_mode & FMODE_WRITE) 2509 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2510 task_name, &setup[0]); 2511 if (file->f_mode & FMODE_READ) 2512 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2513 task_name, &setup[1]); 2514 2515 nonblock = !!(file->f_flags & O_NONBLOCK); 2516 if (!nonblock) 2517 nonblock = nonblock_open; 2518 2519 init_waitqueue_entry(&wait, current); 2520 add_wait_queue(&pcm->open_wait, &wait); 2521 mutex_lock(&pcm->open_mutex); 2522 while (1) { 2523 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2524 iminor(inode), setup); 2525 if (err >= 0) 2526 break; 2527 if (err == -EAGAIN) { 2528 if (nonblock) { 2529 err = -EBUSY; 2530 break; 2531 } 2532 } else 2533 break; 2534 set_current_state(TASK_INTERRUPTIBLE); 2535 mutex_unlock(&pcm->open_mutex); 2536 schedule(); 2537 mutex_lock(&pcm->open_mutex); 2538 if (pcm->card->shutdown) { 2539 err = -ENODEV; 2540 break; 2541 } 2542 if (signal_pending(current)) { 2543 err = -ERESTARTSYS; 2544 break; 2545 } 2546 } 2547 remove_wait_queue(&pcm->open_wait, &wait); 2548 mutex_unlock(&pcm->open_mutex); 2549 if (err < 0) 2550 goto __error; 2551 snd_card_unref(pcm->card); 2552 return err; 2553 2554 __error: 2555 module_put(pcm->card->module); 2556 __error2: 2557 snd_card_file_remove(pcm->card, file); 2558 __error1: 2559 if (pcm) 2560 snd_card_unref(pcm->card); 2561 return err; 2562 } 2563 2564 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2565 { 2566 struct snd_pcm *pcm; 2567 struct snd_pcm_substream *substream; 2568 struct snd_pcm_oss_file *pcm_oss_file; 2569 2570 pcm_oss_file = file->private_data; 2571 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2572 if (substream == NULL) 2573 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2574 if (snd_BUG_ON(!substream)) 2575 return -ENXIO; 2576 pcm = substream->pcm; 2577 if (!pcm->card->shutdown) 2578 snd_pcm_oss_sync(pcm_oss_file); 2579 mutex_lock(&pcm->open_mutex); 2580 snd_pcm_oss_release_file(pcm_oss_file); 2581 mutex_unlock(&pcm->open_mutex); 2582 wake_up(&pcm->open_wait); 2583 module_put(pcm->card->module); 2584 snd_card_file_remove(pcm->card, file); 2585 return 0; 2586 } 2587 2588 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2589 { 2590 struct snd_pcm_oss_file *pcm_oss_file; 2591 int __user *p = (int __user *)arg; 2592 int res; 2593 2594 pcm_oss_file = file->private_data; 2595 if (cmd == OSS_GETVERSION) 2596 return put_user(SNDRV_OSS_VERSION, p); 2597 if (cmd == OSS_ALSAEMULVER) 2598 return put_user(1, p); 2599 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2600 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2601 struct snd_pcm_substream *substream; 2602 int idx; 2603 for (idx = 0; idx < 2; ++idx) { 2604 substream = pcm_oss_file->streams[idx]; 2605 if (substream != NULL) 2606 break; 2607 } 2608 if (snd_BUG_ON(idx >= 2)) 2609 return -ENXIO; 2610 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2611 } 2612 #endif 2613 if (((cmd >> 8) & 0xff) != 'P') 2614 return -EINVAL; 2615 #ifdef OSS_DEBUG 2616 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2617 #endif 2618 switch (cmd) { 2619 case SNDCTL_DSP_RESET: 2620 return snd_pcm_oss_reset(pcm_oss_file); 2621 case SNDCTL_DSP_SYNC: 2622 return snd_pcm_oss_sync(pcm_oss_file); 2623 case SNDCTL_DSP_SPEED: 2624 if (get_user(res, p)) 2625 return -EFAULT; 2626 res = snd_pcm_oss_set_rate(pcm_oss_file, res); 2627 if (res < 0) 2628 return res; 2629 return put_user(res, p); 2630 case SOUND_PCM_READ_RATE: 2631 res = snd_pcm_oss_get_rate(pcm_oss_file); 2632 if (res < 0) 2633 return res; 2634 return put_user(res, p); 2635 case SNDCTL_DSP_STEREO: 2636 if (get_user(res, p)) 2637 return -EFAULT; 2638 res = res > 0 ? 2 : 1; 2639 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2640 if (res < 0) 2641 return res; 2642 return put_user(--res, p); 2643 case SNDCTL_DSP_GETBLKSIZE: 2644 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2645 if (res < 0) 2646 return res; 2647 return put_user(res, p); 2648 case SNDCTL_DSP_SETFMT: 2649 if (get_user(res, p)) 2650 return -EFAULT; 2651 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2652 if (res < 0) 2653 return res; 2654 return put_user(res, p); 2655 case SOUND_PCM_READ_BITS: 2656 res = snd_pcm_oss_get_format(pcm_oss_file); 2657 if (res < 0) 2658 return res; 2659 return put_user(res, p); 2660 case SNDCTL_DSP_CHANNELS: 2661 if (get_user(res, p)) 2662 return -EFAULT; 2663 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2664 if (res < 0) 2665 return res; 2666 return put_user(res, p); 2667 case SOUND_PCM_READ_CHANNELS: 2668 res = snd_pcm_oss_get_channels(pcm_oss_file); 2669 if (res < 0) 2670 return res; 2671 return put_user(res, p); 2672 case SOUND_PCM_WRITE_FILTER: 2673 case SOUND_PCM_READ_FILTER: 2674 return -EIO; 2675 case SNDCTL_DSP_POST: 2676 return snd_pcm_oss_post(pcm_oss_file); 2677 case SNDCTL_DSP_SUBDIVIDE: 2678 if (get_user(res, p)) 2679 return -EFAULT; 2680 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2681 if (res < 0) 2682 return res; 2683 return put_user(res, p); 2684 case SNDCTL_DSP_SETFRAGMENT: 2685 if (get_user(res, p)) 2686 return -EFAULT; 2687 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2688 case SNDCTL_DSP_GETFMTS: 2689 res = snd_pcm_oss_get_formats(pcm_oss_file); 2690 if (res < 0) 2691 return res; 2692 return put_user(res, p); 2693 case SNDCTL_DSP_GETOSPACE: 2694 case SNDCTL_DSP_GETISPACE: 2695 return snd_pcm_oss_get_space(pcm_oss_file, 2696 cmd == SNDCTL_DSP_GETISPACE ? 2697 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2698 (struct audio_buf_info __user *) arg); 2699 case SNDCTL_DSP_NONBLOCK: 2700 return snd_pcm_oss_nonblock(file); 2701 case SNDCTL_DSP_GETCAPS: 2702 res = snd_pcm_oss_get_caps(pcm_oss_file); 2703 if (res < 0) 2704 return res; 2705 return put_user(res, p); 2706 case SNDCTL_DSP_GETTRIGGER: 2707 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2708 if (res < 0) 2709 return res; 2710 return put_user(res, p); 2711 case SNDCTL_DSP_SETTRIGGER: 2712 if (get_user(res, p)) 2713 return -EFAULT; 2714 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2715 case SNDCTL_DSP_GETIPTR: 2716 case SNDCTL_DSP_GETOPTR: 2717 return snd_pcm_oss_get_ptr(pcm_oss_file, 2718 cmd == SNDCTL_DSP_GETIPTR ? 2719 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2720 (struct count_info __user *) arg); 2721 case SNDCTL_DSP_MAPINBUF: 2722 case SNDCTL_DSP_MAPOUTBUF: 2723 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2724 cmd == SNDCTL_DSP_MAPINBUF ? 2725 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2726 (struct buffmem_desc __user *) arg); 2727 case SNDCTL_DSP_SETSYNCRO: 2728 /* stop DMA now.. */ 2729 return 0; 2730 case SNDCTL_DSP_SETDUPLEX: 2731 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2732 return 0; 2733 return -EIO; 2734 case SNDCTL_DSP_GETODELAY: 2735 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2736 if (res < 0) { 2737 /* it's for sure, some broken apps don't check for error codes */ 2738 put_user(0, p); 2739 return res; 2740 } 2741 return put_user(res, p); 2742 case SNDCTL_DSP_PROFILE: 2743 return 0; /* silently ignore */ 2744 default: 2745 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2746 } 2747 return -EINVAL; 2748 } 2749 2750 #ifdef CONFIG_COMPAT 2751 /* all compatible */ 2752 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2753 unsigned long arg) 2754 { 2755 /* 2756 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF, 2757 * which are not implemented for the native case either 2758 */ 2759 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2760 } 2761 #else 2762 #define snd_pcm_oss_ioctl_compat NULL 2763 #endif 2764 2765 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2766 { 2767 struct snd_pcm_oss_file *pcm_oss_file; 2768 struct snd_pcm_substream *substream; 2769 2770 pcm_oss_file = file->private_data; 2771 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2772 if (substream == NULL) 2773 return -ENXIO; 2774 substream->f_flags = file->f_flags & O_NONBLOCK; 2775 #ifndef OSS_DEBUG 2776 return snd_pcm_oss_read1(substream, buf, count); 2777 #else 2778 { 2779 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2780 pcm_dbg(substream->pcm, 2781 "pcm_oss: read %li bytes (returned %li bytes)\n", 2782 (long)count, (long)res); 2783 return res; 2784 } 2785 #endif 2786 } 2787 2788 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2789 { 2790 struct snd_pcm_oss_file *pcm_oss_file; 2791 struct snd_pcm_substream *substream; 2792 long result; 2793 2794 pcm_oss_file = file->private_data; 2795 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2796 if (substream == NULL) 2797 return -ENXIO; 2798 substream->f_flags = file->f_flags & O_NONBLOCK; 2799 result = snd_pcm_oss_write1(substream, buf, count); 2800 #ifdef OSS_DEBUG 2801 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2802 (long)count, (long)result); 2803 #endif 2804 return result; 2805 } 2806 2807 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2808 { 2809 struct snd_pcm_runtime *runtime = substream->runtime; 2810 if (atomic_read(&substream->mmap_count)) 2811 return runtime->oss.prev_hw_ptr_period != 2812 get_hw_ptr_period(runtime); 2813 else 2814 return snd_pcm_playback_avail(runtime) >= 2815 runtime->oss.period_frames; 2816 } 2817 2818 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2819 { 2820 struct snd_pcm_runtime *runtime = substream->runtime; 2821 if (atomic_read(&substream->mmap_count)) 2822 return runtime->oss.prev_hw_ptr_period != 2823 get_hw_ptr_period(runtime); 2824 else 2825 return snd_pcm_capture_avail(runtime) >= 2826 runtime->oss.period_frames; 2827 } 2828 2829 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) 2830 { 2831 struct snd_pcm_oss_file *pcm_oss_file; 2832 __poll_t mask; 2833 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2834 2835 pcm_oss_file = file->private_data; 2836 2837 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2838 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2839 2840 mask = 0; 2841 if (psubstream != NULL) { 2842 struct snd_pcm_runtime *runtime = psubstream->runtime; 2843 poll_wait(file, &runtime->sleep, wait); 2844 scoped_guard(pcm_stream_lock_irq, psubstream) { 2845 if (runtime->state != SNDRV_PCM_STATE_DRAINING && 2846 (runtime->state != SNDRV_PCM_STATE_RUNNING || 2847 snd_pcm_oss_playback_ready(psubstream))) 2848 mask |= EPOLLOUT | EPOLLWRNORM; 2849 } 2850 } 2851 if (csubstream != NULL) { 2852 struct snd_pcm_runtime *runtime = csubstream->runtime; 2853 snd_pcm_state_t ostate; 2854 poll_wait(file, &runtime->sleep, wait); 2855 scoped_guard(pcm_stream_lock_irq, csubstream) { 2856 ostate = runtime->state; 2857 if (ostate != SNDRV_PCM_STATE_RUNNING || 2858 snd_pcm_oss_capture_ready(csubstream)) 2859 mask |= EPOLLIN | EPOLLRDNORM; 2860 } 2861 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2862 struct snd_pcm_oss_file ofile; 2863 memset(&ofile, 0, sizeof(ofile)); 2864 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2865 runtime->oss.trigger = 0; 2866 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2867 } 2868 } 2869 2870 return mask; 2871 } 2872 2873 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2874 { 2875 struct snd_pcm_oss_file *pcm_oss_file; 2876 struct snd_pcm_substream *substream = NULL; 2877 struct snd_pcm_runtime *runtime; 2878 int err; 2879 2880 #ifdef OSS_DEBUG 2881 pr_debug("pcm_oss: mmap begin\n"); 2882 #endif 2883 pcm_oss_file = file->private_data; 2884 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2885 case VM_READ | VM_WRITE: 2886 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2887 if (substream) 2888 break; 2889 fallthrough; 2890 case VM_READ: 2891 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2892 break; 2893 case VM_WRITE: 2894 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2895 break; 2896 default: 2897 return -EINVAL; 2898 } 2899 /* set VM_READ access as well to fix memset() routines that do 2900 reads before writes (to improve performance) */ 2901 vm_flags_set(area, VM_READ); 2902 if (substream == NULL) 2903 return -ENXIO; 2904 runtime = substream->runtime; 2905 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2906 return -EIO; 2907 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2908 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2909 else 2910 return -EIO; 2911 2912 if (runtime->oss.params) { 2913 /* use mutex_trylock() for params_lock for avoiding a deadlock 2914 * between mmap_lock and params_lock taken by 2915 * copy_from/to_user() in snd_pcm_oss_write/read() 2916 */ 2917 err = snd_pcm_oss_change_params(substream, true); 2918 if (err < 0) 2919 return err; 2920 } 2921 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2922 if (runtime->oss.plugin_first != NULL) 2923 return -EIO; 2924 #endif 2925 2926 if (area->vm_pgoff != 0) 2927 return -EINVAL; 2928 2929 err = snd_pcm_mmap_data(substream, file, area); 2930 if (err < 0) 2931 return err; 2932 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2933 runtime->silence_threshold = 0; 2934 runtime->silence_size = 0; 2935 #ifdef OSS_DEBUG 2936 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2937 runtime->oss.mmap_bytes); 2938 #endif 2939 /* In mmap mode we never stop */ 2940 runtime->stop_threshold = runtime->boundary; 2941 2942 return 0; 2943 } 2944 2945 #ifdef CONFIG_SND_VERBOSE_PROCFS 2946 /* 2947 * /proc interface 2948 */ 2949 2950 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2951 struct snd_info_buffer *buffer) 2952 { 2953 struct snd_pcm_str *pstr = entry->private_data; 2954 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2955 guard(mutex)(&pstr->oss.setup_mutex); 2956 while (setup) { 2957 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2958 setup->task_name, 2959 setup->periods, 2960 setup->period_size, 2961 setup->disable ? " disable" : "", 2962 setup->direct ? " direct" : "", 2963 setup->block ? " block" : "", 2964 setup->nonblock ? " non-block" : "", 2965 setup->partialfrag ? " partial-frag" : "", 2966 setup->nosilence ? " no-silence" : ""); 2967 setup = setup->next; 2968 } 2969 } 2970 2971 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2972 { 2973 struct snd_pcm_oss_setup *setup, *setupn; 2974 2975 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2976 setup; setup = setupn) { 2977 setupn = setup->next; 2978 kfree(setup->task_name); 2979 kfree(setup); 2980 } 2981 pstr->oss.setup_list = NULL; 2982 } 2983 2984 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2985 struct snd_info_buffer *buffer) 2986 { 2987 struct snd_pcm_str *pstr = entry->private_data; 2988 char line[128], str[32], task_name[32]; 2989 const char *ptr; 2990 int idx1; 2991 struct snd_pcm_oss_setup *setup, *setup1, template; 2992 2993 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2994 guard(mutex)(&pstr->oss.setup_mutex); 2995 memset(&template, 0, sizeof(template)); 2996 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2997 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2998 snd_pcm_oss_proc_free_setup_list(pstr); 2999 continue; 3000 } 3001 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 3002 if (!strcmp(setup->task_name, task_name)) { 3003 template = *setup; 3004 break; 3005 } 3006 } 3007 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3008 template.periods = simple_strtoul(str, NULL, 10); 3009 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3010 template.period_size = simple_strtoul(str, NULL, 10); 3011 for (idx1 = 31; idx1 >= 0; idx1--) 3012 if (template.period_size & (1 << idx1)) 3013 break; 3014 for (idx1--; idx1 >= 0; idx1--) 3015 template.period_size &= ~(1 << idx1); 3016 do { 3017 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3018 if (!strcmp(str, "disable")) { 3019 template.disable = 1; 3020 } else if (!strcmp(str, "direct")) { 3021 template.direct = 1; 3022 } else if (!strcmp(str, "block")) { 3023 template.block = 1; 3024 } else if (!strcmp(str, "non-block")) { 3025 template.nonblock = 1; 3026 } else if (!strcmp(str, "partial-frag")) { 3027 template.partialfrag = 1; 3028 } else if (!strcmp(str, "no-silence")) { 3029 template.nosilence = 1; 3030 } else if (!strcmp(str, "buggy-ptr")) { 3031 template.buggyptr = 1; 3032 } 3033 } while (*str); 3034 if (setup == NULL) { 3035 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 3036 if (! setup) { 3037 buffer->error = -ENOMEM; 3038 return; 3039 } 3040 if (pstr->oss.setup_list == NULL) 3041 pstr->oss.setup_list = setup; 3042 else { 3043 for (setup1 = pstr->oss.setup_list; 3044 setup1->next; setup1 = setup1->next); 3045 setup1->next = setup; 3046 } 3047 template.task_name = kstrdup(task_name, GFP_KERNEL); 3048 if (! template.task_name) { 3049 kfree(setup); 3050 buffer->error = -ENOMEM; 3051 return; 3052 } 3053 } 3054 *setup = template; 3055 } 3056 } 3057 3058 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3059 { 3060 int stream; 3061 for (stream = 0; stream < 2; ++stream) { 3062 struct snd_info_entry *entry; 3063 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3064 if (pstr->substream_count == 0) 3065 continue; 3066 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root); 3067 if (entry) { 3068 entry->content = SNDRV_INFO_CONTENT_TEXT; 3069 entry->mode = S_IFREG | 0644; 3070 entry->c.text.read = snd_pcm_oss_proc_read; 3071 entry->c.text.write = snd_pcm_oss_proc_write; 3072 entry->private_data = pstr; 3073 if (snd_info_register(entry) < 0) { 3074 snd_info_free_entry(entry); 3075 entry = NULL; 3076 } 3077 } 3078 pstr->oss.proc_entry = entry; 3079 } 3080 } 3081 3082 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3083 { 3084 int stream; 3085 for (stream = 0; stream < 2; ++stream) { 3086 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3087 snd_info_free_entry(pstr->oss.proc_entry); 3088 pstr->oss.proc_entry = NULL; 3089 snd_pcm_oss_proc_free_setup_list(pstr); 3090 } 3091 } 3092 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 3093 static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3094 { 3095 } 3096 static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3097 { 3098 } 3099 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 3100 3101 /* 3102 * ENTRY functions 3103 */ 3104 3105 static const struct file_operations snd_pcm_oss_f_reg = 3106 { 3107 .owner = THIS_MODULE, 3108 .read = snd_pcm_oss_read, 3109 .write = snd_pcm_oss_write, 3110 .open = snd_pcm_oss_open, 3111 .release = snd_pcm_oss_release, 3112 .poll = snd_pcm_oss_poll, 3113 .unlocked_ioctl = snd_pcm_oss_ioctl, 3114 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3115 .mmap = snd_pcm_oss_mmap, 3116 }; 3117 3118 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3119 { 3120 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3121 pcm->card, index, &snd_pcm_oss_f_reg, 3122 pcm) < 0) { 3123 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3124 pcm->card->number, pcm->device); 3125 } 3126 } 3127 3128 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3129 { 3130 pcm->oss.reg = 0; 3131 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3132 char name[128]; 3133 int duplex; 3134 register_oss_dsp(pcm, 0); 3135 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3136 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3137 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3138 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3139 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3140 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3141 pcm->card->number, 3142 name); 3143 #endif 3144 pcm->oss.reg++; 3145 pcm->oss.reg_mask |= 1; 3146 } 3147 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3148 register_oss_dsp(pcm, 1); 3149 pcm->oss.reg++; 3150 pcm->oss.reg_mask |= 2; 3151 } 3152 3153 if (pcm->oss.reg) 3154 snd_pcm_oss_proc_init(pcm); 3155 3156 return 0; 3157 } 3158 3159 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3160 { 3161 if (pcm->oss.reg) { 3162 if (pcm->oss.reg_mask & 1) { 3163 pcm->oss.reg_mask &= ~1; 3164 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3165 pcm->card, 0); 3166 } 3167 if (pcm->oss.reg_mask & 2) { 3168 pcm->oss.reg_mask &= ~2; 3169 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3170 pcm->card, 1); 3171 } 3172 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3173 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3174 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3175 #endif 3176 } 3177 pcm->oss.reg = 0; 3178 } 3179 return 0; 3180 } 3181 3182 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3183 { 3184 snd_pcm_oss_disconnect_minor(pcm); 3185 snd_pcm_oss_proc_done(pcm); 3186 return 0; 3187 } 3188 3189 static struct snd_pcm_notify snd_pcm_oss_notify = 3190 { 3191 .n_register = snd_pcm_oss_register_minor, 3192 .n_disconnect = snd_pcm_oss_disconnect_minor, 3193 .n_unregister = snd_pcm_oss_unregister_minor, 3194 }; 3195 3196 static int __init alsa_pcm_oss_init(void) 3197 { 3198 int i; 3199 int err; 3200 3201 /* check device map table */ 3202 for (i = 0; i < SNDRV_CARDS; i++) { 3203 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3204 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3205 i, dsp_map[i]); 3206 dsp_map[i] = 0; 3207 } 3208 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3209 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3210 i, adsp_map[i]); 3211 adsp_map[i] = 1; 3212 } 3213 } 3214 err = snd_pcm_notify(&snd_pcm_oss_notify, 0); 3215 if (err < 0) 3216 return err; 3217 return 0; 3218 } 3219 3220 static void __exit alsa_pcm_oss_exit(void) 3221 { 3222 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3223 } 3224 3225 module_init(alsa_pcm_oss_init) 3226 module_exit(alsa_pcm_oss_exit) 3227