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