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