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 if (runtime->dma_area) 1078 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1079 1080 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1081 1082 err = 0; 1083 failure: 1084 if (err) 1085 snd_pcm_oss_release_buffers(substream); 1086 kfree(sw_params); 1087 kfree(params); 1088 kfree(sparams); 1089 return err; 1090 } 1091 1092 /* this one takes the lock by itself */ 1093 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 1094 bool trylock) 1095 { 1096 struct snd_pcm_runtime *runtime = substream->runtime; 1097 int err; 1098 1099 if (trylock) { 1100 if (!(mutex_trylock(&runtime->oss.params_lock))) 1101 return -EAGAIN; 1102 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1103 return -ERESTARTSYS; 1104 1105 err = snd_pcm_oss_change_params_locked(substream); 1106 mutex_unlock(&runtime->oss.params_lock); 1107 return err; 1108 } 1109 1110 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1111 { 1112 int idx, err; 1113 struct snd_pcm_substream *asubstream = NULL, *substream; 1114 1115 for (idx = 0; idx < 2; idx++) { 1116 substream = pcm_oss_file->streams[idx]; 1117 if (substream == NULL) 1118 continue; 1119 if (asubstream == NULL) 1120 asubstream = substream; 1121 if (substream->runtime->oss.params) { 1122 err = snd_pcm_oss_change_params(substream, false); 1123 if (err < 0) 1124 return err; 1125 } 1126 } 1127 if (!asubstream) 1128 return -EIO; 1129 if (r_substream) 1130 *r_substream = asubstream; 1131 return 0; 1132 } 1133 1134 /* call with params_lock held */ 1135 /* NOTE: this always call PREPARE unconditionally no matter whether 1136 * runtime->oss.prepare is set or not 1137 */ 1138 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1139 { 1140 int err; 1141 struct snd_pcm_runtime *runtime = substream->runtime; 1142 1143 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1144 if (err < 0) { 1145 pcm_dbg(substream->pcm, 1146 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1147 return err; 1148 } 1149 runtime->oss.prepare = 0; 1150 runtime->oss.prev_hw_ptr_period = 0; 1151 runtime->oss.period_ptr = 0; 1152 runtime->oss.buffer_used = 0; 1153 1154 return 0; 1155 } 1156 1157 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1158 { 1159 struct snd_pcm_runtime *runtime; 1160 int err; 1161 1162 runtime = substream->runtime; 1163 if (runtime->oss.params) { 1164 err = snd_pcm_oss_change_params(substream, false); 1165 if (err < 0) 1166 return err; 1167 } 1168 if (runtime->oss.prepare) { 1169 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1170 return -ERESTARTSYS; 1171 err = snd_pcm_oss_prepare(substream); 1172 mutex_unlock(&runtime->oss.params_lock); 1173 if (err < 0) 1174 return err; 1175 } 1176 return 0; 1177 } 1178 1179 /* call with params_lock held */ 1180 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) 1181 { 1182 struct snd_pcm_runtime *runtime; 1183 int err; 1184 1185 runtime = substream->runtime; 1186 if (runtime->oss.params) { 1187 err = snd_pcm_oss_change_params_locked(substream); 1188 if (err < 0) 1189 return err; 1190 } 1191 if (runtime->oss.prepare) { 1192 err = snd_pcm_oss_prepare(substream); 1193 if (err < 0) 1194 return err; 1195 } 1196 return 0; 1197 } 1198 1199 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1200 { 1201 struct snd_pcm_runtime *runtime; 1202 snd_pcm_uframes_t frames; 1203 int err = 0; 1204 1205 while (1) { 1206 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1207 if (err < 0) 1208 break; 1209 runtime = substream->runtime; 1210 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1211 break; 1212 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1213 /* until avail(delay) <= buffer_size */ 1214 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1215 frames /= runtime->period_size; 1216 frames *= runtime->period_size; 1217 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1218 if (err < 0) 1219 break; 1220 } 1221 return err; 1222 } 1223 1224 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1225 { 1226 struct snd_pcm_runtime *runtime = substream->runtime; 1227 int ret; 1228 while (1) { 1229 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1230 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1231 #ifdef OSS_DEBUG 1232 pcm_dbg(substream->pcm, 1233 "pcm_oss: write: recovering from %s\n", 1234 runtime->state == SNDRV_PCM_STATE_XRUN ? 1235 "XRUN" : "SUSPEND"); 1236 #endif 1237 ret = snd_pcm_oss_prepare(substream); 1238 if (ret < 0) 1239 break; 1240 } 1241 mutex_unlock(&runtime->oss.params_lock); 1242 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1243 frames, in_kernel); 1244 mutex_lock(&runtime->oss.params_lock); 1245 if (ret != -EPIPE && ret != -ESTRPIPE) 1246 break; 1247 /* test, if we can't store new data, because the stream */ 1248 /* has not been started */ 1249 if (runtime->state == SNDRV_PCM_STATE_PREPARED) 1250 return -EAGAIN; 1251 } 1252 return ret; 1253 } 1254 1255 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1256 { 1257 struct snd_pcm_runtime *runtime = substream->runtime; 1258 snd_pcm_sframes_t delay; 1259 int ret; 1260 while (1) { 1261 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1262 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1263 #ifdef OSS_DEBUG 1264 pcm_dbg(substream->pcm, 1265 "pcm_oss: read: recovering from %s\n", 1266 runtime->state == SNDRV_PCM_STATE_XRUN ? 1267 "XRUN" : "SUSPEND"); 1268 #endif 1269 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1270 if (ret < 0) 1271 break; 1272 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { 1273 ret = snd_pcm_oss_prepare(substream); 1274 if (ret < 0) 1275 break; 1276 } 1277 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1278 if (ret < 0) 1279 break; 1280 mutex_unlock(&runtime->oss.params_lock); 1281 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1282 frames, in_kernel); 1283 mutex_lock(&runtime->oss.params_lock); 1284 if (ret == -EPIPE) { 1285 if (runtime->state == SNDRV_PCM_STATE_DRAINING) { 1286 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1287 if (ret < 0) 1288 break; 1289 } 1290 continue; 1291 } 1292 if (ret != -ESTRPIPE) 1293 break; 1294 } 1295 return ret; 1296 } 1297 1298 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1299 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1300 { 1301 struct snd_pcm_runtime *runtime = substream->runtime; 1302 int ret; 1303 while (1) { 1304 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1305 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1306 #ifdef OSS_DEBUG 1307 pcm_dbg(substream->pcm, 1308 "pcm_oss: writev: recovering from %s\n", 1309 runtime->state == SNDRV_PCM_STATE_XRUN ? 1310 "XRUN" : "SUSPEND"); 1311 #endif 1312 ret = snd_pcm_oss_prepare(substream); 1313 if (ret < 0) 1314 break; 1315 } 1316 ret = snd_pcm_kernel_writev(substream, bufs, frames); 1317 if (ret != -EPIPE && ret != -ESTRPIPE) 1318 break; 1319 1320 /* test, if we can't store new data, because the stream */ 1321 /* has not been started */ 1322 if (runtime->state == SNDRV_PCM_STATE_PREPARED) 1323 return -EAGAIN; 1324 } 1325 return ret; 1326 } 1327 1328 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1329 { 1330 struct snd_pcm_runtime *runtime = substream->runtime; 1331 int ret; 1332 while (1) { 1333 if (runtime->state == SNDRV_PCM_STATE_XRUN || 1334 runtime->state == SNDRV_PCM_STATE_SUSPENDED) { 1335 #ifdef OSS_DEBUG 1336 pcm_dbg(substream->pcm, 1337 "pcm_oss: readv: recovering from %s\n", 1338 runtime->state == SNDRV_PCM_STATE_XRUN ? 1339 "XRUN" : "SUSPEND"); 1340 #endif 1341 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1342 if (ret < 0) 1343 break; 1344 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { 1345 ret = snd_pcm_oss_prepare(substream); 1346 if (ret < 0) 1347 break; 1348 } 1349 ret = snd_pcm_kernel_readv(substream, bufs, frames); 1350 if (ret != -EPIPE && ret != -ESTRPIPE) 1351 break; 1352 } 1353 return ret; 1354 } 1355 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 1356 1357 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1358 { 1359 struct snd_pcm_runtime *runtime = substream->runtime; 1360 snd_pcm_sframes_t frames, frames1; 1361 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1362 if (runtime->oss.plugin_first) { 1363 struct snd_pcm_plugin_channel *channels; 1364 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1365 if (!in_kernel) { 1366 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1367 return -EFAULT; 1368 buf = runtime->oss.buffer; 1369 } 1370 frames = bytes / oss_frame_bytes; 1371 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1372 if (frames1 < 0) 1373 return frames1; 1374 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1375 if (frames1 <= 0) 1376 return frames1; 1377 bytes = frames1 * oss_frame_bytes; 1378 } else 1379 #endif 1380 { 1381 frames = bytes_to_frames(runtime, bytes); 1382 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1383 if (frames1 <= 0) 1384 return frames1; 1385 bytes = frames_to_bytes(runtime, frames1); 1386 } 1387 return bytes; 1388 } 1389 1390 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1391 { 1392 size_t xfer = 0; 1393 ssize_t tmp = 0; 1394 struct snd_pcm_runtime *runtime = substream->runtime; 1395 1396 if (atomic_read(&substream->mmap_count)) 1397 return -ENXIO; 1398 1399 atomic_inc(&runtime->oss.rw_ref); 1400 while (bytes > 0) { 1401 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1402 tmp = -ERESTARTSYS; 1403 break; 1404 } 1405 tmp = snd_pcm_oss_make_ready_locked(substream); 1406 if (tmp < 0) 1407 goto err; 1408 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1409 tmp = bytes; 1410 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1411 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1412 if (tmp > 0) { 1413 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1414 tmp = -EFAULT; 1415 goto err; 1416 } 1417 } 1418 runtime->oss.buffer_used += tmp; 1419 buf += tmp; 1420 bytes -= tmp; 1421 xfer += tmp; 1422 if (substream->oss.setup.partialfrag || 1423 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1424 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1425 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1426 if (tmp <= 0) 1427 goto err; 1428 runtime->oss.bytes += tmp; 1429 runtime->oss.period_ptr += tmp; 1430 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1431 if (runtime->oss.period_ptr == 0 || 1432 runtime->oss.period_ptr == runtime->oss.buffer_used) 1433 runtime->oss.buffer_used = 0; 1434 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1435 tmp = -EAGAIN; 1436 goto err; 1437 } 1438 } 1439 } else { 1440 tmp = snd_pcm_oss_write2(substream, 1441 (const char __force *)buf, 1442 runtime->oss.period_bytes, 0); 1443 if (tmp <= 0) 1444 goto err; 1445 runtime->oss.bytes += tmp; 1446 buf += tmp; 1447 bytes -= tmp; 1448 xfer += tmp; 1449 if ((substream->f_flags & O_NONBLOCK) != 0 && 1450 tmp != runtime->oss.period_bytes) 1451 tmp = -EAGAIN; 1452 } 1453 err: 1454 mutex_unlock(&runtime->oss.params_lock); 1455 if (tmp < 0) 1456 break; 1457 if (signal_pending(current)) { 1458 tmp = -ERESTARTSYS; 1459 break; 1460 } 1461 tmp = 0; 1462 } 1463 atomic_dec(&runtime->oss.rw_ref); 1464 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1465 } 1466 1467 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1468 { 1469 struct snd_pcm_runtime *runtime = substream->runtime; 1470 snd_pcm_sframes_t frames, frames1; 1471 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1472 char __user *final_dst = (char __force __user *)buf; 1473 if (runtime->oss.plugin_first) { 1474 struct snd_pcm_plugin_channel *channels; 1475 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1476 if (!in_kernel) 1477 buf = runtime->oss.buffer; 1478 frames = bytes / oss_frame_bytes; 1479 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1480 if (frames1 < 0) 1481 return frames1; 1482 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1483 if (frames1 <= 0) 1484 return frames1; 1485 bytes = frames1 * oss_frame_bytes; 1486 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1487 return -EFAULT; 1488 } else 1489 #endif 1490 { 1491 frames = bytes_to_frames(runtime, bytes); 1492 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1493 if (frames1 <= 0) 1494 return frames1; 1495 bytes = frames_to_bytes(runtime, frames1); 1496 } 1497 return bytes; 1498 } 1499 1500 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1501 { 1502 size_t xfer = 0; 1503 ssize_t tmp = 0; 1504 struct snd_pcm_runtime *runtime = substream->runtime; 1505 1506 if (atomic_read(&substream->mmap_count)) 1507 return -ENXIO; 1508 1509 atomic_inc(&runtime->oss.rw_ref); 1510 while (bytes > 0) { 1511 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1512 tmp = -ERESTARTSYS; 1513 break; 1514 } 1515 tmp = snd_pcm_oss_make_ready_locked(substream); 1516 if (tmp < 0) 1517 goto err; 1518 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1519 if (runtime->oss.buffer_used == 0) { 1520 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1521 if (tmp <= 0) 1522 goto err; 1523 runtime->oss.bytes += tmp; 1524 runtime->oss.period_ptr = tmp; 1525 runtime->oss.buffer_used = tmp; 1526 } 1527 tmp = bytes; 1528 if ((size_t) tmp > runtime->oss.buffer_used) 1529 tmp = runtime->oss.buffer_used; 1530 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1531 tmp = -EFAULT; 1532 goto err; 1533 } 1534 buf += tmp; 1535 bytes -= tmp; 1536 xfer += tmp; 1537 runtime->oss.buffer_used -= tmp; 1538 } else { 1539 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1540 runtime->oss.period_bytes, 0); 1541 if (tmp <= 0) 1542 goto err; 1543 runtime->oss.bytes += tmp; 1544 buf += tmp; 1545 bytes -= tmp; 1546 xfer += tmp; 1547 } 1548 err: 1549 mutex_unlock(&runtime->oss.params_lock); 1550 if (tmp < 0) 1551 break; 1552 if (signal_pending(current)) { 1553 tmp = -ERESTARTSYS; 1554 break; 1555 } 1556 tmp = 0; 1557 } 1558 atomic_dec(&runtime->oss.rw_ref); 1559 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1560 } 1561 1562 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1563 { 1564 struct snd_pcm_substream *substream; 1565 struct snd_pcm_runtime *runtime; 1566 int i; 1567 1568 for (i = 0; i < 2; i++) { 1569 substream = pcm_oss_file->streams[i]; 1570 if (!substream) 1571 continue; 1572 runtime = substream->runtime; 1573 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1574 mutex_lock(&runtime->oss.params_lock); 1575 runtime->oss.prepare = 1; 1576 runtime->oss.buffer_used = 0; 1577 runtime->oss.prev_hw_ptr_period = 0; 1578 runtime->oss.period_ptr = 0; 1579 mutex_unlock(&runtime->oss.params_lock); 1580 } 1581 return 0; 1582 } 1583 1584 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1585 { 1586 struct snd_pcm_substream *substream; 1587 int err; 1588 1589 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1590 if (substream != NULL) { 1591 err = snd_pcm_oss_make_ready(substream); 1592 if (err < 0) 1593 return err; 1594 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1595 } 1596 /* note: all errors from the start action are ignored */ 1597 /* OSS apps do not know, how to handle them */ 1598 return 0; 1599 } 1600 1601 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1602 { 1603 struct snd_pcm_runtime *runtime; 1604 ssize_t result = 0; 1605 snd_pcm_state_t state; 1606 long res; 1607 wait_queue_entry_t wait; 1608 1609 runtime = substream->runtime; 1610 init_waitqueue_entry(&wait, current); 1611 add_wait_queue(&runtime->sleep, &wait); 1612 #ifdef OSS_DEBUG 1613 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1614 #endif 1615 while (1) { 1616 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1617 if (result > 0) { 1618 runtime->oss.buffer_used = 0; 1619 result = 0; 1620 break; 1621 } 1622 if (result != 0 && result != -EAGAIN) 1623 break; 1624 result = 0; 1625 set_current_state(TASK_INTERRUPTIBLE); 1626 scoped_guard(pcm_stream_lock_irq, substream) 1627 state = runtime->state; 1628 if (state != SNDRV_PCM_STATE_RUNNING) { 1629 set_current_state(TASK_RUNNING); 1630 break; 1631 } 1632 res = schedule_timeout(10 * HZ); 1633 if (signal_pending(current)) { 1634 result = -ERESTARTSYS; 1635 break; 1636 } 1637 if (res == 0) { 1638 pcm_err(substream->pcm, 1639 "OSS sync error - DMA timeout\n"); 1640 result = -EIO; 1641 break; 1642 } 1643 } 1644 remove_wait_queue(&runtime->sleep, &wait); 1645 return result; 1646 } 1647 1648 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1649 { 1650 int err = 0; 1651 unsigned int saved_f_flags; 1652 struct snd_pcm_substream *substream; 1653 struct snd_pcm_runtime *runtime; 1654 snd_pcm_format_t format; 1655 unsigned long width; 1656 size_t size; 1657 1658 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1659 if (substream != NULL) { 1660 runtime = substream->runtime; 1661 if (atomic_read(&substream->mmap_count)) 1662 goto __direct; 1663 atomic_inc(&runtime->oss.rw_ref); 1664 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1665 atomic_dec(&runtime->oss.rw_ref); 1666 return -ERESTARTSYS; 1667 } 1668 err = snd_pcm_oss_make_ready_locked(substream); 1669 if (err < 0) 1670 goto unlock; 1671 format = snd_pcm_oss_format_from(runtime->oss.format); 1672 width = snd_pcm_format_physical_width(format); 1673 if (runtime->oss.buffer_used > 0) { 1674 #ifdef OSS_DEBUG 1675 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1676 #endif 1677 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1678 snd_pcm_format_set_silence(format, 1679 runtime->oss.buffer + runtime->oss.buffer_used, 1680 size); 1681 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1682 if (err < 0) 1683 goto unlock; 1684 } else if (runtime->oss.period_ptr > 0) { 1685 #ifdef OSS_DEBUG 1686 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1687 #endif 1688 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1689 snd_pcm_format_set_silence(format, 1690 runtime->oss.buffer, 1691 size * 8 / width); 1692 err = snd_pcm_oss_sync1(substream, size); 1693 if (err < 0) 1694 goto unlock; 1695 } 1696 /* 1697 * The ALSA's period might be a bit large than OSS one. 1698 * Fill the remain portion of ALSA period with zeros. 1699 */ 1700 size = runtime->control->appl_ptr % runtime->period_size; 1701 if (size > 0) { 1702 size = runtime->period_size - size; 1703 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) 1704 snd_pcm_lib_write(substream, NULL, size); 1705 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 1706 snd_pcm_lib_writev(substream, NULL, size); 1707 } 1708 unlock: 1709 mutex_unlock(&runtime->oss.params_lock); 1710 atomic_dec(&runtime->oss.rw_ref); 1711 if (err < 0) 1712 return err; 1713 /* 1714 * finish sync: drain the buffer 1715 */ 1716 __direct: 1717 saved_f_flags = substream->f_flags; 1718 substream->f_flags &= ~O_NONBLOCK; 1719 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1720 substream->f_flags = saved_f_flags; 1721 if (err < 0) 1722 return err; 1723 mutex_lock(&runtime->oss.params_lock); 1724 runtime->oss.prepare = 1; 1725 mutex_unlock(&runtime->oss.params_lock); 1726 } 1727 1728 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1729 if (substream != NULL) { 1730 err = snd_pcm_oss_make_ready(substream); 1731 if (err < 0) 1732 return err; 1733 runtime = substream->runtime; 1734 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1735 if (err < 0) 1736 return err; 1737 mutex_lock(&runtime->oss.params_lock); 1738 runtime->oss.buffer_used = 0; 1739 runtime->oss.prepare = 1; 1740 mutex_unlock(&runtime->oss.params_lock); 1741 } 1742 return 0; 1743 } 1744 1745 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1746 { 1747 int idx; 1748 1749 for (idx = 1; idx >= 0; --idx) { 1750 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1751 struct snd_pcm_runtime *runtime; 1752 int err; 1753 1754 if (substream == NULL) 1755 continue; 1756 runtime = substream->runtime; 1757 if (rate < 1000) 1758 rate = 1000; 1759 else if (rate > 192000) 1760 rate = 192000; 1761 err = lock_params(runtime); 1762 if (err < 0) 1763 return err; 1764 if (runtime->oss.rate != rate) { 1765 runtime->oss.params = 1; 1766 runtime->oss.rate = rate; 1767 } 1768 unlock_params(runtime); 1769 } 1770 return snd_pcm_oss_get_rate(pcm_oss_file); 1771 } 1772 1773 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1774 { 1775 struct snd_pcm_substream *substream; 1776 int err; 1777 1778 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1779 if (err < 0) 1780 return err; 1781 return substream->runtime->oss.rate; 1782 } 1783 1784 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1785 { 1786 int idx; 1787 if (channels < 1) 1788 channels = 1; 1789 if (channels > 128) 1790 return -EINVAL; 1791 for (idx = 1; idx >= 0; --idx) { 1792 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1793 struct snd_pcm_runtime *runtime; 1794 int err; 1795 1796 if (substream == NULL) 1797 continue; 1798 runtime = substream->runtime; 1799 err = lock_params(runtime); 1800 if (err < 0) 1801 return err; 1802 if (runtime->oss.channels != channels) { 1803 runtime->oss.params = 1; 1804 runtime->oss.channels = channels; 1805 } 1806 unlock_params(runtime); 1807 } 1808 return snd_pcm_oss_get_channels(pcm_oss_file); 1809 } 1810 1811 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1812 { 1813 struct snd_pcm_substream *substream; 1814 int err; 1815 1816 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1817 if (err < 0) 1818 return err; 1819 return substream->runtime->oss.channels; 1820 } 1821 1822 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1823 { 1824 struct snd_pcm_substream *substream; 1825 int err; 1826 1827 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1828 if (err < 0) 1829 return err; 1830 return substream->runtime->oss.period_bytes; 1831 } 1832 1833 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1834 { 1835 struct snd_pcm_substream *substream; 1836 int err; 1837 int direct; 1838 struct snd_pcm_hw_params *params __free(kfree) = NULL; 1839 unsigned int formats = 0; 1840 const struct snd_mask *format_mask; 1841 int fmt; 1842 1843 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1844 if (err < 0) 1845 return err; 1846 if (atomic_read(&substream->mmap_count)) 1847 direct = 1; 1848 else 1849 direct = substream->oss.setup.direct; 1850 if (!direct) 1851 return AFMT_MU_LAW | AFMT_U8 | 1852 AFMT_S16_LE | AFMT_S16_BE | 1853 AFMT_S8 | AFMT_U16_LE | 1854 AFMT_U16_BE | 1855 AFMT_S32_LE | AFMT_S32_BE | 1856 AFMT_S24_LE | AFMT_S24_BE | 1857 AFMT_S24_PACKED; 1858 params = kmalloc(sizeof(*params), GFP_KERNEL); 1859 if (!params) 1860 return -ENOMEM; 1861 _snd_pcm_hw_params_any(params); 1862 err = snd_pcm_hw_refine(substream, params); 1863 if (err < 0) 1864 return err; 1865 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); 1866 for (fmt = 0; fmt < 32; ++fmt) { 1867 if (snd_mask_test(format_mask, fmt)) { 1868 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); 1869 if (f >= 0) 1870 formats |= f; 1871 } 1872 } 1873 1874 return formats; 1875 } 1876 1877 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1878 { 1879 int formats, idx; 1880 int err; 1881 1882 if (format != AFMT_QUERY) { 1883 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1884 if (formats < 0) 1885 return formats; 1886 if (!(formats & format)) 1887 format = AFMT_U8; 1888 for (idx = 1; idx >= 0; --idx) { 1889 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1890 struct snd_pcm_runtime *runtime; 1891 if (substream == NULL) 1892 continue; 1893 runtime = substream->runtime; 1894 err = lock_params(runtime); 1895 if (err < 0) 1896 return err; 1897 if (runtime->oss.format != format) { 1898 runtime->oss.params = 1; 1899 runtime->oss.format = format; 1900 } 1901 unlock_params(runtime); 1902 } 1903 } 1904 return snd_pcm_oss_get_format(pcm_oss_file); 1905 } 1906 1907 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1908 { 1909 struct snd_pcm_substream *substream; 1910 int err; 1911 1912 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1913 if (err < 0) 1914 return err; 1915 return substream->runtime->oss.format; 1916 } 1917 1918 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1919 { 1920 struct snd_pcm_runtime *runtime; 1921 1922 runtime = substream->runtime; 1923 if (subdivide == 0) { 1924 subdivide = runtime->oss.subdivision; 1925 if (subdivide == 0) 1926 subdivide = 1; 1927 return subdivide; 1928 } 1929 if (runtime->oss.subdivision || runtime->oss.fragshift) 1930 return -EINVAL; 1931 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1932 subdivide != 8 && subdivide != 16) 1933 return -EINVAL; 1934 runtime->oss.subdivision = subdivide; 1935 runtime->oss.params = 1; 1936 return subdivide; 1937 } 1938 1939 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1940 { 1941 int err = -EINVAL, idx; 1942 1943 for (idx = 1; idx >= 0; --idx) { 1944 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1945 struct snd_pcm_runtime *runtime; 1946 1947 if (substream == NULL) 1948 continue; 1949 runtime = substream->runtime; 1950 err = lock_params(runtime); 1951 if (err < 0) 1952 return err; 1953 err = snd_pcm_oss_set_subdivide1(substream, subdivide); 1954 unlock_params(runtime); 1955 if (err < 0) 1956 return err; 1957 } 1958 return err; 1959 } 1960 1961 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1962 { 1963 struct snd_pcm_runtime *runtime; 1964 int fragshift; 1965 1966 runtime = substream->runtime; 1967 if (runtime->oss.subdivision || runtime->oss.fragshift) 1968 return -EINVAL; 1969 fragshift = val & 0xffff; 1970 if (fragshift >= 25) /* should be large enough */ 1971 return -EINVAL; 1972 runtime->oss.fragshift = fragshift; 1973 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1974 if (runtime->oss.fragshift < 4) /* < 16 */ 1975 runtime->oss.fragshift = 4; 1976 if (runtime->oss.maxfrags < 2) 1977 runtime->oss.maxfrags = 2; 1978 runtime->oss.params = 1; 1979 return 0; 1980 } 1981 1982 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1983 { 1984 int err = -EINVAL, idx; 1985 1986 for (idx = 1; idx >= 0; --idx) { 1987 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1988 struct snd_pcm_runtime *runtime; 1989 1990 if (substream == NULL) 1991 continue; 1992 runtime = substream->runtime; 1993 err = lock_params(runtime); 1994 if (err < 0) 1995 return err; 1996 err = snd_pcm_oss_set_fragment1(substream, val); 1997 unlock_params(runtime); 1998 if (err < 0) 1999 return err; 2000 } 2001 return err; 2002 } 2003 2004 static int snd_pcm_oss_nonblock(struct file * file) 2005 { 2006 spin_lock(&file->f_lock); 2007 file->f_flags |= O_NONBLOCK; 2008 spin_unlock(&file->f_lock); 2009 return 0; 2010 } 2011 2012 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 2013 { 2014 2015 if (substream == NULL) { 2016 res &= ~DSP_CAP_DUPLEX; 2017 return res; 2018 } 2019 #ifdef DSP_CAP_MULTI 2020 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2021 if (substream->pstr->substream_count > 1) 2022 res |= DSP_CAP_MULTI; 2023 #endif 2024 /* DSP_CAP_REALTIME is set all times: */ 2025 /* all ALSA drivers can return actual pointer in ring buffer */ 2026 #if defined(DSP_CAP_REALTIME) && 0 2027 { 2028 struct snd_pcm_runtime *runtime = substream->runtime; 2029 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 2030 res &= ~DSP_CAP_REALTIME; 2031 } 2032 #endif 2033 return res; 2034 } 2035 2036 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 2037 { 2038 int result, idx; 2039 2040 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 2041 for (idx = 0; idx < 2; idx++) { 2042 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 2043 result = snd_pcm_oss_get_caps1(substream, result); 2044 } 2045 result |= 0x0001; /* revision - same as SB AWE 64 */ 2046 return result; 2047 } 2048 2049 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 2050 snd_pcm_uframes_t hw_ptr) 2051 { 2052 struct snd_pcm_runtime *runtime = substream->runtime; 2053 snd_pcm_uframes_t appl_ptr; 2054 appl_ptr = hw_ptr + runtime->buffer_size; 2055 appl_ptr %= runtime->boundary; 2056 runtime->control->appl_ptr = appl_ptr; 2057 } 2058 2059 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 2060 { 2061 struct snd_pcm_runtime *runtime; 2062 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2063 int err, cmd; 2064 2065 #ifdef OSS_DEBUG 2066 pr_debug("pcm_oss: trigger = 0x%x\n", trigger); 2067 #endif 2068 2069 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2070 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2071 2072 if (psubstream) { 2073 err = snd_pcm_oss_make_ready(psubstream); 2074 if (err < 0) 2075 return err; 2076 } 2077 if (csubstream) { 2078 err = snd_pcm_oss_make_ready(csubstream); 2079 if (err < 0) 2080 return err; 2081 } 2082 if (psubstream) { 2083 runtime = psubstream->runtime; 2084 cmd = 0; 2085 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2086 return -ERESTARTSYS; 2087 if (trigger & PCM_ENABLE_OUTPUT) { 2088 if (runtime->oss.trigger) 2089 goto _skip1; 2090 if (atomic_read(&psubstream->mmap_count)) 2091 snd_pcm_oss_simulate_fill(psubstream, 2092 get_hw_ptr_period(runtime)); 2093 runtime->oss.trigger = 1; 2094 runtime->start_threshold = 1; 2095 cmd = SNDRV_PCM_IOCTL_START; 2096 } else { 2097 if (!runtime->oss.trigger) 2098 goto _skip1; 2099 runtime->oss.trigger = 0; 2100 runtime->start_threshold = runtime->boundary; 2101 cmd = SNDRV_PCM_IOCTL_DROP; 2102 runtime->oss.prepare = 1; 2103 } 2104 _skip1: 2105 mutex_unlock(&runtime->oss.params_lock); 2106 if (cmd) { 2107 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2108 if (err < 0) 2109 return err; 2110 } 2111 } 2112 if (csubstream) { 2113 runtime = csubstream->runtime; 2114 cmd = 0; 2115 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2116 return -ERESTARTSYS; 2117 if (trigger & PCM_ENABLE_INPUT) { 2118 if (runtime->oss.trigger) 2119 goto _skip2; 2120 runtime->oss.trigger = 1; 2121 runtime->start_threshold = 1; 2122 cmd = SNDRV_PCM_IOCTL_START; 2123 } else { 2124 if (!runtime->oss.trigger) 2125 goto _skip2; 2126 runtime->oss.trigger = 0; 2127 runtime->start_threshold = runtime->boundary; 2128 cmd = SNDRV_PCM_IOCTL_DROP; 2129 runtime->oss.prepare = 1; 2130 } 2131 _skip2: 2132 mutex_unlock(&runtime->oss.params_lock); 2133 if (cmd) { 2134 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2135 if (err < 0) 2136 return err; 2137 } 2138 } 2139 return 0; 2140 } 2141 2142 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2143 { 2144 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2145 int result = 0; 2146 2147 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2148 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2149 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2150 result |= PCM_ENABLE_OUTPUT; 2151 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2152 result |= PCM_ENABLE_INPUT; 2153 return result; 2154 } 2155 2156 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2157 { 2158 struct snd_pcm_substream *substream; 2159 struct snd_pcm_runtime *runtime; 2160 snd_pcm_sframes_t delay; 2161 int err; 2162 2163 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2164 if (substream == NULL) 2165 return -EINVAL; 2166 err = snd_pcm_oss_make_ready(substream); 2167 if (err < 0) 2168 return err; 2169 runtime = substream->runtime; 2170 if (runtime->oss.params || runtime->oss.prepare) 2171 return 0; 2172 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2173 if (err == -EPIPE) 2174 delay = 0; /* hack for broken OSS applications */ 2175 else if (err < 0) 2176 return err; 2177 return snd_pcm_oss_bytes(substream, delay); 2178 } 2179 2180 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2181 { 2182 struct snd_pcm_substream *substream; 2183 struct snd_pcm_runtime *runtime; 2184 snd_pcm_sframes_t delay; 2185 int fixup; 2186 struct count_info info; 2187 int err; 2188 2189 if (_info == NULL) 2190 return -EFAULT; 2191 substream = pcm_oss_file->streams[stream]; 2192 if (substream == NULL) 2193 return -EINVAL; 2194 err = snd_pcm_oss_make_ready(substream); 2195 if (err < 0) 2196 return err; 2197 runtime = substream->runtime; 2198 if (runtime->oss.params || runtime->oss.prepare) { 2199 memset(&info, 0, sizeof(info)); 2200 if (copy_to_user(_info, &info, sizeof(info))) 2201 return -EFAULT; 2202 return 0; 2203 } 2204 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2205 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2206 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2207 err = 0; 2208 delay = 0; 2209 fixup = 0; 2210 } else { 2211 fixup = runtime->oss.buffer_used; 2212 } 2213 } else { 2214 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2215 fixup = -runtime->oss.buffer_used; 2216 } 2217 if (err < 0) 2218 return err; 2219 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2220 if (atomic_read(&substream->mmap_count)) { 2221 snd_pcm_sframes_t n; 2222 delay = get_hw_ptr_period(runtime); 2223 n = delay - runtime->oss.prev_hw_ptr_period; 2224 if (n < 0) 2225 n += runtime->boundary; 2226 info.blocks = n / runtime->period_size; 2227 runtime->oss.prev_hw_ptr_period = delay; 2228 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2229 snd_pcm_oss_simulate_fill(substream, delay); 2230 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2231 } else { 2232 delay = snd_pcm_oss_bytes(substream, delay); 2233 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2234 if (substream->oss.setup.buggyptr) 2235 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2236 else 2237 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2238 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2239 } else { 2240 delay += fixup; 2241 info.blocks = delay / runtime->oss.period_bytes; 2242 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2243 } 2244 } 2245 if (copy_to_user(_info, &info, sizeof(info))) 2246 return -EFAULT; 2247 return 0; 2248 } 2249 2250 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2251 { 2252 struct snd_pcm_substream *substream; 2253 struct snd_pcm_runtime *runtime; 2254 snd_pcm_sframes_t avail; 2255 int fixup; 2256 struct audio_buf_info info; 2257 int err; 2258 2259 if (_info == NULL) 2260 return -EFAULT; 2261 substream = pcm_oss_file->streams[stream]; 2262 if (substream == NULL) 2263 return -EINVAL; 2264 runtime = substream->runtime; 2265 2266 if (runtime->oss.params) { 2267 err = snd_pcm_oss_change_params(substream, false); 2268 if (err < 0) 2269 return err; 2270 } 2271 2272 info.fragsize = runtime->oss.period_bytes; 2273 info.fragstotal = runtime->periods; 2274 if (runtime->oss.prepare) { 2275 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2276 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2277 info.fragments = runtime->oss.periods; 2278 } else { 2279 info.bytes = 0; 2280 info.fragments = 0; 2281 } 2282 } else { 2283 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2284 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2285 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2286 avail = runtime->buffer_size; 2287 err = 0; 2288 fixup = 0; 2289 } else { 2290 avail = runtime->buffer_size - avail; 2291 fixup = -runtime->oss.buffer_used; 2292 } 2293 } else { 2294 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2295 fixup = runtime->oss.buffer_used; 2296 } 2297 if (err < 0) 2298 return err; 2299 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2300 info.fragments = info.bytes / runtime->oss.period_bytes; 2301 } 2302 2303 #ifdef OSS_DEBUG 2304 pcm_dbg(substream->pcm, 2305 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2306 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2307 #endif 2308 if (copy_to_user(_info, &info, sizeof(info))) 2309 return -EFAULT; 2310 return 0; 2311 } 2312 2313 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2314 { 2315 // it won't be probably implemented 2316 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2317 return -EINVAL; 2318 } 2319 2320 static const char *strip_task_path(const char *path) 2321 { 2322 const char *ptr, *ptrl = NULL; 2323 for (ptr = path; *ptr; ptr++) { 2324 if (*ptr == '/') 2325 ptrl = ptr + 1; 2326 } 2327 return ptrl; 2328 } 2329 2330 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2331 const char *task_name, 2332 struct snd_pcm_oss_setup *rsetup) 2333 { 2334 struct snd_pcm_oss_setup *setup; 2335 2336 guard(mutex)(&pcm->streams[stream].oss.setup_mutex); 2337 do { 2338 for (setup = pcm->streams[stream].oss.setup_list; setup; 2339 setup = setup->next) { 2340 if (!strcmp(setup->task_name, task_name)) 2341 goto out; 2342 } 2343 } while ((task_name = strip_task_path(task_name)) != NULL); 2344 out: 2345 if (setup) 2346 *rsetup = *setup; 2347 } 2348 2349 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2350 { 2351 snd_pcm_oss_release_buffers(substream); 2352 substream->oss.oss = 0; 2353 } 2354 2355 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2356 struct snd_pcm_oss_setup *setup, 2357 int minor) 2358 { 2359 struct snd_pcm_runtime *runtime; 2360 2361 substream->oss.oss = 1; 2362 substream->oss.setup = *setup; 2363 if (setup->nonblock) 2364 substream->f_flags |= O_NONBLOCK; 2365 else if (setup->block) 2366 substream->f_flags &= ~O_NONBLOCK; 2367 runtime = substream->runtime; 2368 runtime->oss.params = 1; 2369 runtime->oss.trigger = 1; 2370 runtime->oss.rate = 8000; 2371 mutex_init(&runtime->oss.params_lock); 2372 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2373 case SNDRV_MINOR_OSS_PCM_8: 2374 runtime->oss.format = AFMT_U8; 2375 break; 2376 case SNDRV_MINOR_OSS_PCM_16: 2377 runtime->oss.format = AFMT_S16_LE; 2378 break; 2379 default: 2380 runtime->oss.format = AFMT_MU_LAW; 2381 } 2382 runtime->oss.channels = 1; 2383 runtime->oss.fragshift = 0; 2384 runtime->oss.maxfrags = 0; 2385 runtime->oss.subdivision = 0; 2386 substream->pcm_release = snd_pcm_oss_release_substream; 2387 atomic_set(&runtime->oss.rw_ref, 0); 2388 } 2389 2390 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2391 { 2392 int cidx; 2393 if (!pcm_oss_file) 2394 return 0; 2395 for (cidx = 0; cidx < 2; ++cidx) { 2396 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2397 if (substream) 2398 snd_pcm_release_substream(substream); 2399 } 2400 kfree(pcm_oss_file); 2401 return 0; 2402 } 2403 2404 static int snd_pcm_oss_open_file(struct file *file, 2405 struct snd_pcm *pcm, 2406 struct snd_pcm_oss_file **rpcm_oss_file, 2407 int minor, 2408 struct snd_pcm_oss_setup *setup) 2409 { 2410 int idx, err; 2411 struct snd_pcm_oss_file *pcm_oss_file; 2412 struct snd_pcm_substream *substream; 2413 fmode_t f_mode = file->f_mode; 2414 2415 if (rpcm_oss_file) 2416 *rpcm_oss_file = NULL; 2417 2418 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2419 if (pcm_oss_file == NULL) 2420 return -ENOMEM; 2421 2422 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2423 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2424 f_mode = FMODE_WRITE; 2425 2426 file->f_flags &= ~O_APPEND; 2427 for (idx = 0; idx < 2; idx++) { 2428 if (setup[idx].disable) 2429 continue; 2430 if (! pcm->streams[idx].substream_count) 2431 continue; /* no matching substream */ 2432 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2433 if (! (f_mode & FMODE_WRITE)) 2434 continue; 2435 } else { 2436 if (! (f_mode & FMODE_READ)) 2437 continue; 2438 } 2439 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2440 if (err < 0) { 2441 snd_pcm_oss_release_file(pcm_oss_file); 2442 return err; 2443 } 2444 2445 pcm_oss_file->streams[idx] = substream; 2446 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2447 } 2448 2449 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2450 snd_pcm_oss_release_file(pcm_oss_file); 2451 return -EINVAL; 2452 } 2453 2454 file->private_data = pcm_oss_file; 2455 if (rpcm_oss_file) 2456 *rpcm_oss_file = pcm_oss_file; 2457 return 0; 2458 } 2459 2460 2461 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2462 { 2463 unsigned int idx; 2464 2465 if (snd_BUG_ON(!task || !name || size < 2)) 2466 return -EINVAL; 2467 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2468 name[idx] = task->comm[idx]; 2469 name[idx] = '\0'; 2470 return 0; 2471 } 2472 2473 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2474 { 2475 int err; 2476 char task_name[32]; 2477 struct snd_pcm *pcm; 2478 struct snd_pcm_oss_file *pcm_oss_file; 2479 struct snd_pcm_oss_setup setup[2]; 2480 int nonblock; 2481 wait_queue_entry_t wait; 2482 2483 err = nonseekable_open(inode, file); 2484 if (err < 0) 2485 return err; 2486 2487 pcm = snd_lookup_oss_minor_data(iminor(inode), 2488 SNDRV_OSS_DEVICE_TYPE_PCM); 2489 if (pcm == NULL) { 2490 err = -ENODEV; 2491 goto __error1; 2492 } 2493 err = snd_card_file_add(pcm->card, file); 2494 if (err < 0) 2495 goto __error1; 2496 if (!try_module_get(pcm->card->module)) { 2497 err = -EFAULT; 2498 goto __error2; 2499 } 2500 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2501 err = -EFAULT; 2502 goto __error; 2503 } 2504 memset(setup, 0, sizeof(setup)); 2505 if (file->f_mode & FMODE_WRITE) 2506 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2507 task_name, &setup[0]); 2508 if (file->f_mode & FMODE_READ) 2509 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2510 task_name, &setup[1]); 2511 2512 nonblock = !!(file->f_flags & O_NONBLOCK); 2513 if (!nonblock) 2514 nonblock = nonblock_open; 2515 2516 init_waitqueue_entry(&wait, current); 2517 add_wait_queue(&pcm->open_wait, &wait); 2518 mutex_lock(&pcm->open_mutex); 2519 while (1) { 2520 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2521 iminor(inode), setup); 2522 if (err >= 0) 2523 break; 2524 if (err == -EAGAIN) { 2525 if (nonblock) { 2526 err = -EBUSY; 2527 break; 2528 } 2529 } else 2530 break; 2531 set_current_state(TASK_INTERRUPTIBLE); 2532 mutex_unlock(&pcm->open_mutex); 2533 schedule(); 2534 mutex_lock(&pcm->open_mutex); 2535 if (pcm->card->shutdown) { 2536 err = -ENODEV; 2537 break; 2538 } 2539 if (signal_pending(current)) { 2540 err = -ERESTARTSYS; 2541 break; 2542 } 2543 } 2544 remove_wait_queue(&pcm->open_wait, &wait); 2545 mutex_unlock(&pcm->open_mutex); 2546 if (err < 0) 2547 goto __error; 2548 snd_card_unref(pcm->card); 2549 return err; 2550 2551 __error: 2552 module_put(pcm->card->module); 2553 __error2: 2554 snd_card_file_remove(pcm->card, file); 2555 __error1: 2556 if (pcm) 2557 snd_card_unref(pcm->card); 2558 return err; 2559 } 2560 2561 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2562 { 2563 struct snd_pcm *pcm; 2564 struct snd_pcm_substream *substream; 2565 struct snd_pcm_oss_file *pcm_oss_file; 2566 2567 pcm_oss_file = file->private_data; 2568 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2569 if (substream == NULL) 2570 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2571 if (snd_BUG_ON(!substream)) 2572 return -ENXIO; 2573 pcm = substream->pcm; 2574 if (!pcm->card->shutdown) 2575 snd_pcm_oss_sync(pcm_oss_file); 2576 mutex_lock(&pcm->open_mutex); 2577 snd_pcm_oss_release_file(pcm_oss_file); 2578 mutex_unlock(&pcm->open_mutex); 2579 wake_up(&pcm->open_wait); 2580 module_put(pcm->card->module); 2581 snd_card_file_remove(pcm->card, file); 2582 return 0; 2583 } 2584 2585 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2586 { 2587 struct snd_pcm_oss_file *pcm_oss_file; 2588 int __user *p = (int __user *)arg; 2589 int res; 2590 2591 pcm_oss_file = file->private_data; 2592 if (cmd == OSS_GETVERSION) 2593 return put_user(SNDRV_OSS_VERSION, p); 2594 if (cmd == OSS_ALSAEMULVER) 2595 return put_user(1, p); 2596 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2597 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2598 struct snd_pcm_substream *substream; 2599 int idx; 2600 for (idx = 0; idx < 2; ++idx) { 2601 substream = pcm_oss_file->streams[idx]; 2602 if (substream != NULL) 2603 break; 2604 } 2605 if (snd_BUG_ON(idx >= 2)) 2606 return -ENXIO; 2607 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2608 } 2609 #endif 2610 if (((cmd >> 8) & 0xff) != 'P') 2611 return -EINVAL; 2612 #ifdef OSS_DEBUG 2613 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2614 #endif 2615 switch (cmd) { 2616 case SNDCTL_DSP_RESET: 2617 return snd_pcm_oss_reset(pcm_oss_file); 2618 case SNDCTL_DSP_SYNC: 2619 return snd_pcm_oss_sync(pcm_oss_file); 2620 case SNDCTL_DSP_SPEED: 2621 if (get_user(res, p)) 2622 return -EFAULT; 2623 res = snd_pcm_oss_set_rate(pcm_oss_file, res); 2624 if (res < 0) 2625 return res; 2626 return put_user(res, p); 2627 case SOUND_PCM_READ_RATE: 2628 res = snd_pcm_oss_get_rate(pcm_oss_file); 2629 if (res < 0) 2630 return res; 2631 return put_user(res, p); 2632 case SNDCTL_DSP_STEREO: 2633 if (get_user(res, p)) 2634 return -EFAULT; 2635 res = res > 0 ? 2 : 1; 2636 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2637 if (res < 0) 2638 return res; 2639 return put_user(--res, p); 2640 case SNDCTL_DSP_GETBLKSIZE: 2641 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2642 if (res < 0) 2643 return res; 2644 return put_user(res, p); 2645 case SNDCTL_DSP_SETFMT: 2646 if (get_user(res, p)) 2647 return -EFAULT; 2648 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2649 if (res < 0) 2650 return res; 2651 return put_user(res, p); 2652 case SOUND_PCM_READ_BITS: 2653 res = snd_pcm_oss_get_format(pcm_oss_file); 2654 if (res < 0) 2655 return res; 2656 return put_user(res, p); 2657 case SNDCTL_DSP_CHANNELS: 2658 if (get_user(res, p)) 2659 return -EFAULT; 2660 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2661 if (res < 0) 2662 return res; 2663 return put_user(res, p); 2664 case SOUND_PCM_READ_CHANNELS: 2665 res = snd_pcm_oss_get_channels(pcm_oss_file); 2666 if (res < 0) 2667 return res; 2668 return put_user(res, p); 2669 case SOUND_PCM_WRITE_FILTER: 2670 case SOUND_PCM_READ_FILTER: 2671 return -EIO; 2672 case SNDCTL_DSP_POST: 2673 return snd_pcm_oss_post(pcm_oss_file); 2674 case SNDCTL_DSP_SUBDIVIDE: 2675 if (get_user(res, p)) 2676 return -EFAULT; 2677 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2678 if (res < 0) 2679 return res; 2680 return put_user(res, p); 2681 case SNDCTL_DSP_SETFRAGMENT: 2682 if (get_user(res, p)) 2683 return -EFAULT; 2684 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2685 case SNDCTL_DSP_GETFMTS: 2686 res = snd_pcm_oss_get_formats(pcm_oss_file); 2687 if (res < 0) 2688 return res; 2689 return put_user(res, p); 2690 case SNDCTL_DSP_GETOSPACE: 2691 case SNDCTL_DSP_GETISPACE: 2692 return snd_pcm_oss_get_space(pcm_oss_file, 2693 cmd == SNDCTL_DSP_GETISPACE ? 2694 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2695 (struct audio_buf_info __user *) arg); 2696 case SNDCTL_DSP_NONBLOCK: 2697 return snd_pcm_oss_nonblock(file); 2698 case SNDCTL_DSP_GETCAPS: 2699 res = snd_pcm_oss_get_caps(pcm_oss_file); 2700 if (res < 0) 2701 return res; 2702 return put_user(res, p); 2703 case SNDCTL_DSP_GETTRIGGER: 2704 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2705 if (res < 0) 2706 return res; 2707 return put_user(res, p); 2708 case SNDCTL_DSP_SETTRIGGER: 2709 if (get_user(res, p)) 2710 return -EFAULT; 2711 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2712 case SNDCTL_DSP_GETIPTR: 2713 case SNDCTL_DSP_GETOPTR: 2714 return snd_pcm_oss_get_ptr(pcm_oss_file, 2715 cmd == SNDCTL_DSP_GETIPTR ? 2716 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2717 (struct count_info __user *) arg); 2718 case SNDCTL_DSP_MAPINBUF: 2719 case SNDCTL_DSP_MAPOUTBUF: 2720 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2721 cmd == SNDCTL_DSP_MAPINBUF ? 2722 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2723 (struct buffmem_desc __user *) arg); 2724 case SNDCTL_DSP_SETSYNCRO: 2725 /* stop DMA now.. */ 2726 return 0; 2727 case SNDCTL_DSP_SETDUPLEX: 2728 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2729 return 0; 2730 return -EIO; 2731 case SNDCTL_DSP_GETODELAY: 2732 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2733 if (res < 0) { 2734 /* it's for sure, some broken apps don't check for error codes */ 2735 put_user(0, p); 2736 return res; 2737 } 2738 return put_user(res, p); 2739 case SNDCTL_DSP_PROFILE: 2740 return 0; /* silently ignore */ 2741 default: 2742 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2743 } 2744 return -EINVAL; 2745 } 2746 2747 #ifdef CONFIG_COMPAT 2748 /* all compatible */ 2749 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2750 unsigned long arg) 2751 { 2752 /* 2753 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF, 2754 * which are not implemented for the native case either 2755 */ 2756 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2757 } 2758 #else 2759 #define snd_pcm_oss_ioctl_compat NULL 2760 #endif 2761 2762 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2763 { 2764 struct snd_pcm_oss_file *pcm_oss_file; 2765 struct snd_pcm_substream *substream; 2766 2767 pcm_oss_file = file->private_data; 2768 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2769 if (substream == NULL) 2770 return -ENXIO; 2771 substream->f_flags = file->f_flags & O_NONBLOCK; 2772 #ifndef OSS_DEBUG 2773 return snd_pcm_oss_read1(substream, buf, count); 2774 #else 2775 { 2776 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2777 pcm_dbg(substream->pcm, 2778 "pcm_oss: read %li bytes (returned %li bytes)\n", 2779 (long)count, (long)res); 2780 return res; 2781 } 2782 #endif 2783 } 2784 2785 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2786 { 2787 struct snd_pcm_oss_file *pcm_oss_file; 2788 struct snd_pcm_substream *substream; 2789 long result; 2790 2791 pcm_oss_file = file->private_data; 2792 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2793 if (substream == NULL) 2794 return -ENXIO; 2795 substream->f_flags = file->f_flags & O_NONBLOCK; 2796 result = snd_pcm_oss_write1(substream, buf, count); 2797 #ifdef OSS_DEBUG 2798 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2799 (long)count, (long)result); 2800 #endif 2801 return result; 2802 } 2803 2804 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2805 { 2806 struct snd_pcm_runtime *runtime = substream->runtime; 2807 if (atomic_read(&substream->mmap_count)) 2808 return runtime->oss.prev_hw_ptr_period != 2809 get_hw_ptr_period(runtime); 2810 else 2811 return snd_pcm_playback_avail(runtime) >= 2812 runtime->oss.period_frames; 2813 } 2814 2815 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2816 { 2817 struct snd_pcm_runtime *runtime = substream->runtime; 2818 if (atomic_read(&substream->mmap_count)) 2819 return runtime->oss.prev_hw_ptr_period != 2820 get_hw_ptr_period(runtime); 2821 else 2822 return snd_pcm_capture_avail(runtime) >= 2823 runtime->oss.period_frames; 2824 } 2825 2826 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) 2827 { 2828 struct snd_pcm_oss_file *pcm_oss_file; 2829 __poll_t mask; 2830 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2831 2832 pcm_oss_file = file->private_data; 2833 2834 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2835 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2836 2837 mask = 0; 2838 if (psubstream != NULL) { 2839 struct snd_pcm_runtime *runtime = psubstream->runtime; 2840 poll_wait(file, &runtime->sleep, wait); 2841 scoped_guard(pcm_stream_lock_irq, psubstream) { 2842 if (runtime->state != SNDRV_PCM_STATE_DRAINING && 2843 (runtime->state != SNDRV_PCM_STATE_RUNNING || 2844 snd_pcm_oss_playback_ready(psubstream))) 2845 mask |= EPOLLOUT | EPOLLWRNORM; 2846 } 2847 } 2848 if (csubstream != NULL) { 2849 struct snd_pcm_runtime *runtime = csubstream->runtime; 2850 snd_pcm_state_t ostate; 2851 poll_wait(file, &runtime->sleep, wait); 2852 scoped_guard(pcm_stream_lock_irq, csubstream) { 2853 ostate = runtime->state; 2854 if (ostate != SNDRV_PCM_STATE_RUNNING || 2855 snd_pcm_oss_capture_ready(csubstream)) 2856 mask |= EPOLLIN | EPOLLRDNORM; 2857 } 2858 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2859 struct snd_pcm_oss_file ofile; 2860 memset(&ofile, 0, sizeof(ofile)); 2861 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2862 runtime->oss.trigger = 0; 2863 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2864 } 2865 } 2866 2867 return mask; 2868 } 2869 2870 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2871 { 2872 struct snd_pcm_oss_file *pcm_oss_file; 2873 struct snd_pcm_substream *substream = NULL; 2874 struct snd_pcm_runtime *runtime; 2875 int err; 2876 2877 #ifdef OSS_DEBUG 2878 pr_debug("pcm_oss: mmap begin\n"); 2879 #endif 2880 pcm_oss_file = file->private_data; 2881 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2882 case VM_READ | VM_WRITE: 2883 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2884 if (substream) 2885 break; 2886 fallthrough; 2887 case VM_READ: 2888 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2889 break; 2890 case VM_WRITE: 2891 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2892 break; 2893 default: 2894 return -EINVAL; 2895 } 2896 /* set VM_READ access as well to fix memset() routines that do 2897 reads before writes (to improve performance) */ 2898 vm_flags_set(area, VM_READ); 2899 if (substream == NULL) 2900 return -ENXIO; 2901 runtime = substream->runtime; 2902 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2903 return -EIO; 2904 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2905 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2906 else 2907 return -EIO; 2908 2909 if (runtime->oss.params) { 2910 /* use mutex_trylock() for params_lock for avoiding a deadlock 2911 * between mmap_lock and params_lock taken by 2912 * copy_from/to_user() in snd_pcm_oss_write/read() 2913 */ 2914 err = snd_pcm_oss_change_params(substream, true); 2915 if (err < 0) 2916 return err; 2917 } 2918 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2919 if (runtime->oss.plugin_first != NULL) 2920 return -EIO; 2921 #endif 2922 2923 if (area->vm_pgoff != 0) 2924 return -EINVAL; 2925 2926 err = snd_pcm_mmap_data(substream, file, area); 2927 if (err < 0) 2928 return err; 2929 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2930 runtime->silence_threshold = 0; 2931 runtime->silence_size = 0; 2932 #ifdef OSS_DEBUG 2933 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2934 runtime->oss.mmap_bytes); 2935 #endif 2936 /* In mmap mode we never stop */ 2937 runtime->stop_threshold = runtime->boundary; 2938 2939 return 0; 2940 } 2941 2942 #ifdef CONFIG_SND_VERBOSE_PROCFS 2943 /* 2944 * /proc interface 2945 */ 2946 2947 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2948 struct snd_info_buffer *buffer) 2949 { 2950 struct snd_pcm_str *pstr = entry->private_data; 2951 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2952 guard(mutex)(&pstr->oss.setup_mutex); 2953 while (setup) { 2954 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2955 setup->task_name, 2956 setup->periods, 2957 setup->period_size, 2958 setup->disable ? " disable" : "", 2959 setup->direct ? " direct" : "", 2960 setup->block ? " block" : "", 2961 setup->nonblock ? " non-block" : "", 2962 setup->partialfrag ? " partial-frag" : "", 2963 setup->nosilence ? " no-silence" : ""); 2964 setup = setup->next; 2965 } 2966 } 2967 2968 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2969 { 2970 struct snd_pcm_oss_setup *setup, *setupn; 2971 2972 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2973 setup; setup = setupn) { 2974 setupn = setup->next; 2975 kfree(setup->task_name); 2976 kfree(setup); 2977 } 2978 pstr->oss.setup_list = NULL; 2979 } 2980 2981 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2982 struct snd_info_buffer *buffer) 2983 { 2984 struct snd_pcm_str *pstr = entry->private_data; 2985 char line[128], str[32], task_name[32]; 2986 const char *ptr; 2987 int idx1; 2988 struct snd_pcm_oss_setup *setup, *setup1, template; 2989 2990 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2991 guard(mutex)(&pstr->oss.setup_mutex); 2992 memset(&template, 0, sizeof(template)); 2993 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2994 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2995 snd_pcm_oss_proc_free_setup_list(pstr); 2996 continue; 2997 } 2998 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2999 if (!strcmp(setup->task_name, task_name)) { 3000 template = *setup; 3001 break; 3002 } 3003 } 3004 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3005 template.periods = simple_strtoul(str, NULL, 10); 3006 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3007 template.period_size = simple_strtoul(str, NULL, 10); 3008 for (idx1 = 31; idx1 >= 0; idx1--) 3009 if (template.period_size & (1 << idx1)) 3010 break; 3011 for (idx1--; idx1 >= 0; idx1--) 3012 template.period_size &= ~(1 << idx1); 3013 do { 3014 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3015 if (!strcmp(str, "disable")) { 3016 template.disable = 1; 3017 } else if (!strcmp(str, "direct")) { 3018 template.direct = 1; 3019 } else if (!strcmp(str, "block")) { 3020 template.block = 1; 3021 } else if (!strcmp(str, "non-block")) { 3022 template.nonblock = 1; 3023 } else if (!strcmp(str, "partial-frag")) { 3024 template.partialfrag = 1; 3025 } else if (!strcmp(str, "no-silence")) { 3026 template.nosilence = 1; 3027 } else if (!strcmp(str, "buggy-ptr")) { 3028 template.buggyptr = 1; 3029 } 3030 } while (*str); 3031 if (setup == NULL) { 3032 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 3033 if (! setup) { 3034 buffer->error = -ENOMEM; 3035 return; 3036 } 3037 if (pstr->oss.setup_list == NULL) 3038 pstr->oss.setup_list = setup; 3039 else { 3040 for (setup1 = pstr->oss.setup_list; 3041 setup1->next; setup1 = setup1->next); 3042 setup1->next = setup; 3043 } 3044 template.task_name = kstrdup(task_name, GFP_KERNEL); 3045 if (! template.task_name) { 3046 kfree(setup); 3047 buffer->error = -ENOMEM; 3048 return; 3049 } 3050 } 3051 *setup = template; 3052 } 3053 } 3054 3055 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3056 { 3057 int stream; 3058 for (stream = 0; stream < 2; ++stream) { 3059 struct snd_info_entry *entry; 3060 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3061 if (pstr->substream_count == 0) 3062 continue; 3063 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root); 3064 if (entry) { 3065 entry->content = SNDRV_INFO_CONTENT_TEXT; 3066 entry->mode = S_IFREG | 0644; 3067 entry->c.text.read = snd_pcm_oss_proc_read; 3068 entry->c.text.write = snd_pcm_oss_proc_write; 3069 entry->private_data = pstr; 3070 if (snd_info_register(entry) < 0) { 3071 snd_info_free_entry(entry); 3072 entry = NULL; 3073 } 3074 } 3075 pstr->oss.proc_entry = entry; 3076 } 3077 } 3078 3079 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3080 { 3081 int stream; 3082 for (stream = 0; stream < 2; ++stream) { 3083 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3084 snd_info_free_entry(pstr->oss.proc_entry); 3085 pstr->oss.proc_entry = NULL; 3086 snd_pcm_oss_proc_free_setup_list(pstr); 3087 } 3088 } 3089 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 3090 static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3091 { 3092 } 3093 static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3094 { 3095 } 3096 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 3097 3098 /* 3099 * ENTRY functions 3100 */ 3101 3102 static const struct file_operations snd_pcm_oss_f_reg = 3103 { 3104 .owner = THIS_MODULE, 3105 .read = snd_pcm_oss_read, 3106 .write = snd_pcm_oss_write, 3107 .open = snd_pcm_oss_open, 3108 .release = snd_pcm_oss_release, 3109 .llseek = no_llseek, 3110 .poll = snd_pcm_oss_poll, 3111 .unlocked_ioctl = snd_pcm_oss_ioctl, 3112 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3113 .mmap = snd_pcm_oss_mmap, 3114 }; 3115 3116 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3117 { 3118 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3119 pcm->card, index, &snd_pcm_oss_f_reg, 3120 pcm) < 0) { 3121 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3122 pcm->card->number, pcm->device); 3123 } 3124 } 3125 3126 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3127 { 3128 pcm->oss.reg = 0; 3129 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3130 char name[128]; 3131 int duplex; 3132 register_oss_dsp(pcm, 0); 3133 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3134 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3135 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3136 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3137 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3138 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3139 pcm->card->number, 3140 name); 3141 #endif 3142 pcm->oss.reg++; 3143 pcm->oss.reg_mask |= 1; 3144 } 3145 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3146 register_oss_dsp(pcm, 1); 3147 pcm->oss.reg++; 3148 pcm->oss.reg_mask |= 2; 3149 } 3150 3151 if (pcm->oss.reg) 3152 snd_pcm_oss_proc_init(pcm); 3153 3154 return 0; 3155 } 3156 3157 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3158 { 3159 if (pcm->oss.reg) { 3160 if (pcm->oss.reg_mask & 1) { 3161 pcm->oss.reg_mask &= ~1; 3162 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3163 pcm->card, 0); 3164 } 3165 if (pcm->oss.reg_mask & 2) { 3166 pcm->oss.reg_mask &= ~2; 3167 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3168 pcm->card, 1); 3169 } 3170 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3171 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3172 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3173 #endif 3174 } 3175 pcm->oss.reg = 0; 3176 } 3177 return 0; 3178 } 3179 3180 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3181 { 3182 snd_pcm_oss_disconnect_minor(pcm); 3183 snd_pcm_oss_proc_done(pcm); 3184 return 0; 3185 } 3186 3187 static struct snd_pcm_notify snd_pcm_oss_notify = 3188 { 3189 .n_register = snd_pcm_oss_register_minor, 3190 .n_disconnect = snd_pcm_oss_disconnect_minor, 3191 .n_unregister = snd_pcm_oss_unregister_minor, 3192 }; 3193 3194 static int __init alsa_pcm_oss_init(void) 3195 { 3196 int i; 3197 int err; 3198 3199 /* check device map table */ 3200 for (i = 0; i < SNDRV_CARDS; i++) { 3201 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3202 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3203 i, dsp_map[i]); 3204 dsp_map[i] = 0; 3205 } 3206 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3207 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3208 i, adsp_map[i]); 3209 adsp_map[i] = 1; 3210 } 3211 } 3212 err = snd_pcm_notify(&snd_pcm_oss_notify, 0); 3213 if (err < 0) 3214 return err; 3215 return 0; 3216 } 3217 3218 static void __exit alsa_pcm_oss_exit(void) 3219 { 3220 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3221 } 3222 3223 module_init(alsa_pcm_oss_init) 3224 module_exit(alsa_pcm_oss_exit) 3225