1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Digital Audio (PCM) abstract layer / OSS compatible 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 5 */ 6 7 #if 0 8 #define PLUGIN_DEBUG 9 #endif 10 #if 0 11 #define OSS_DEBUG 12 #endif 13 14 #include <linux/init.h> 15 #include <linux/slab.h> 16 #include <linux/sched/signal.h> 17 #include <linux/time.h> 18 #include <linux/vmalloc.h> 19 #include <linux/module.h> 20 #include <linux/math64.h> 21 #include <linux/string.h> 22 #include <linux/compat.h> 23 #include <sound/core.h> 24 #include <sound/minors.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include "pcm_plugin.h" 28 #include <sound/info.h> 29 #include <linux/soundcard.h> 30 #include <sound/initval.h> 31 #include <sound/mixer_oss.h> 32 33 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 34 35 static int dsp_map[SNDRV_CARDS]; 36 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 37 static bool nonblock_open = 1; 38 39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 40 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 41 MODULE_LICENSE("GPL"); 42 module_param_array(dsp_map, int, NULL, 0444); 43 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 44 module_param_array(adsp_map, int, NULL, 0444); 45 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 46 module_param(nonblock_open, bool, 0644); 47 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 48 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 49 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 50 51 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 52 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 53 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 54 55 /* 56 * helper functions to process hw_params 57 */ 58 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 59 { 60 int changed = 0; 61 if (i->min < min) { 62 i->min = min; 63 i->openmin = openmin; 64 changed = 1; 65 } else if (i->min == min && !i->openmin && openmin) { 66 i->openmin = 1; 67 changed = 1; 68 } 69 if (i->integer) { 70 if (i->openmin) { 71 i->min++; 72 i->openmin = 0; 73 } 74 } 75 if (snd_interval_checkempty(i)) { 76 snd_interval_none(i); 77 return -EINVAL; 78 } 79 return changed; 80 } 81 82 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 83 { 84 int changed = 0; 85 if (i->max > max) { 86 i->max = max; 87 i->openmax = openmax; 88 changed = 1; 89 } else if (i->max == max && !i->openmax && openmax) { 90 i->openmax = 1; 91 changed = 1; 92 } 93 if (i->integer) { 94 if (i->openmax) { 95 i->max--; 96 i->openmax = 0; 97 } 98 } 99 if (snd_interval_checkempty(i)) { 100 snd_interval_none(i); 101 return -EINVAL; 102 } 103 return changed; 104 } 105 106 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 107 { 108 struct snd_interval t; 109 t.empty = 0; 110 t.min = t.max = val; 111 t.openmin = t.openmax = 0; 112 t.integer = 1; 113 return snd_interval_refine(i, &t); 114 } 115 116 /** 117 * snd_pcm_hw_param_value_min 118 * @params: the hw_params instance 119 * @var: parameter to retrieve 120 * @dir: pointer to the direction (-1,0,1) or NULL 121 * 122 * Return the minimum value for field PAR. 123 */ 124 static unsigned int 125 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 126 snd_pcm_hw_param_t var, int *dir) 127 { 128 if (hw_is_mask(var)) { 129 if (dir) 130 *dir = 0; 131 return snd_mask_min(hw_param_mask_c(params, var)); 132 } 133 if (hw_is_interval(var)) { 134 const struct snd_interval *i = hw_param_interval_c(params, var); 135 if (dir) 136 *dir = i->openmin; 137 return snd_interval_min(i); 138 } 139 return -EINVAL; 140 } 141 142 /** 143 * snd_pcm_hw_param_value_max 144 * @params: the hw_params instance 145 * @var: parameter to retrieve 146 * @dir: pointer to the direction (-1,0,1) or NULL 147 * 148 * Return the maximum value for field PAR. 149 */ 150 static int 151 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 152 snd_pcm_hw_param_t var, int *dir) 153 { 154 if (hw_is_mask(var)) { 155 if (dir) 156 *dir = 0; 157 return snd_mask_max(hw_param_mask_c(params, var)); 158 } 159 if (hw_is_interval(var)) { 160 const struct snd_interval *i = hw_param_interval_c(params, var); 161 if (dir) 162 *dir = - (int) i->openmax; 163 return snd_interval_max(i); 164 } 165 return -EINVAL; 166 } 167 168 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 169 snd_pcm_hw_param_t var, 170 const struct snd_mask *val) 171 { 172 int changed; 173 changed = snd_mask_refine(hw_param_mask(params, var), val); 174 if (changed > 0) { 175 params->cmask |= 1 << var; 176 params->rmask |= 1 << var; 177 } 178 return changed; 179 } 180 181 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 182 struct snd_pcm_hw_params *params, 183 snd_pcm_hw_param_t var, 184 const struct snd_mask *val) 185 { 186 int changed = _snd_pcm_hw_param_mask(params, var, val); 187 if (changed < 0) 188 return changed; 189 if (params->rmask) { 190 int err = snd_pcm_hw_refine(pcm, params); 191 if (err < 0) 192 return err; 193 } 194 return 0; 195 } 196 197 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 198 snd_pcm_hw_param_t var, unsigned int val, 199 int dir) 200 { 201 int changed; 202 int open = 0; 203 if (dir) { 204 if (dir > 0) { 205 open = 1; 206 } else if (dir < 0) { 207 if (val > 0) { 208 open = 1; 209 val--; 210 } 211 } 212 } 213 if (hw_is_mask(var)) 214 changed = snd_mask_refine_min(hw_param_mask(params, var), 215 val + !!open); 216 else if (hw_is_interval(var)) 217 changed = snd_interval_refine_min(hw_param_interval(params, var), 218 val, open); 219 else 220 return -EINVAL; 221 if (changed > 0) { 222 params->cmask |= 1 << var; 223 params->rmask |= 1 << var; 224 } 225 return changed; 226 } 227 228 /** 229 * snd_pcm_hw_param_min 230 * @pcm: PCM instance 231 * @params: the hw_params instance 232 * @var: parameter to retrieve 233 * @val: minimal value 234 * @dir: pointer to the direction (-1,0,1) or NULL 235 * 236 * Inside configuration space defined by PARAMS remove from PAR all 237 * values < VAL. Reduce configuration space accordingly. 238 * Return new minimum or -EINVAL if the configuration space is empty 239 */ 240 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 241 struct snd_pcm_hw_params *params, 242 snd_pcm_hw_param_t var, unsigned int val, 243 int *dir) 244 { 245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 246 if (changed < 0) 247 return changed; 248 if (params->rmask) { 249 int err = snd_pcm_hw_refine(pcm, params); 250 if (err < 0) 251 return err; 252 } 253 return snd_pcm_hw_param_value_min(params, var, dir); 254 } 255 256 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 257 snd_pcm_hw_param_t var, unsigned int val, 258 int dir) 259 { 260 int changed; 261 int open = 0; 262 if (dir) { 263 if (dir < 0) { 264 open = 1; 265 } else if (dir > 0) { 266 open = 1; 267 val++; 268 } 269 } 270 if (hw_is_mask(var)) { 271 if (val == 0 && open) { 272 snd_mask_none(hw_param_mask(params, var)); 273 changed = -EINVAL; 274 } else 275 changed = snd_mask_refine_max(hw_param_mask(params, var), 276 val - !!open); 277 } else if (hw_is_interval(var)) 278 changed = snd_interval_refine_max(hw_param_interval(params, var), 279 val, open); 280 else 281 return -EINVAL; 282 if (changed > 0) { 283 params->cmask |= 1 << var; 284 params->rmask |= 1 << var; 285 } 286 return changed; 287 } 288 289 /** 290 * snd_pcm_hw_param_max 291 * @pcm: PCM instance 292 * @params: the hw_params instance 293 * @var: parameter to retrieve 294 * @val: maximal value 295 * @dir: pointer to the direction (-1,0,1) or NULL 296 * 297 * Inside configuration space defined by PARAMS remove from PAR all 298 * values >= VAL + 1. Reduce configuration space accordingly. 299 * Return new maximum or -EINVAL if the configuration space is empty 300 */ 301 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 302 struct snd_pcm_hw_params *params, 303 snd_pcm_hw_param_t var, unsigned int val, 304 int *dir) 305 { 306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 307 if (changed < 0) 308 return changed; 309 if (params->rmask) { 310 int err = snd_pcm_hw_refine(pcm, params); 311 if (err < 0) 312 return err; 313 } 314 return snd_pcm_hw_param_value_max(params, var, dir); 315 } 316 317 static int boundary_sub(int a, int adir, 318 int b, int bdir, 319 int *c, int *cdir) 320 { 321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 323 *c = a - b; 324 *cdir = adir - bdir; 325 if (*cdir == -2) { 326 (*c)--; 327 } else if (*cdir == 2) { 328 (*c)++; 329 } 330 return 0; 331 } 332 333 static int boundary_lt(unsigned int a, int adir, 334 unsigned int b, int bdir) 335 { 336 if (adir < 0) { 337 a--; 338 adir = 1; 339 } else if (adir > 0) 340 adir = 1; 341 if (bdir < 0) { 342 b--; 343 bdir = 1; 344 } else if (bdir > 0) 345 bdir = 1; 346 return a < b || (a == b && adir < bdir); 347 } 348 349 /* Return 1 if min is nearer to best than max */ 350 static int boundary_nearer(int min, int mindir, 351 int best, int bestdir, 352 int max, int maxdir) 353 { 354 int dmin, dmindir; 355 int dmax, dmaxdir; 356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 358 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 359 } 360 361 /** 362 * snd_pcm_hw_param_near 363 * @pcm: PCM instance 364 * @params: the hw_params instance 365 * @var: parameter to retrieve 366 * @best: value to set 367 * @dir: pointer to the direction (-1,0,1) or NULL 368 * 369 * Inside configuration space defined by PARAMS set PAR to the available value 370 * nearest to VAL. Reduce configuration space accordingly. 371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 373 * Return the value found. 374 */ 375 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 376 struct snd_pcm_hw_params *params, 377 snd_pcm_hw_param_t var, unsigned int best, 378 int *dir) 379 { 380 struct snd_pcm_hw_params *save = 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 ssize_t s; 686 ssize_t oss_buffer_size; 687 ssize_t oss_period_size, oss_periods; 688 ssize_t min_period_size, max_period_size; 689 struct snd_pcm_runtime *runtime = substream->runtime; 690 size_t oss_frame_size; 691 692 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 693 params_channels(oss_params) / 8; 694 695 oss_buffer_size = snd_pcm_hw_param_value_max(slave_params, 696 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 697 NULL); 698 if (oss_buffer_size <= 0) 699 return -EINVAL; 700 oss_buffer_size = snd_pcm_plug_client_size(substream, 701 oss_buffer_size * oss_frame_size); 702 if (oss_buffer_size <= 0) 703 return -EINVAL; 704 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 705 if (atomic_read(&substream->mmap_count)) { 706 if (oss_buffer_size > runtime->oss.mmap_bytes) 707 oss_buffer_size = runtime->oss.mmap_bytes; 708 } 709 710 if (substream->oss.setup.period_size > 16) 711 oss_period_size = substream->oss.setup.period_size; 712 else if (runtime->oss.fragshift) { 713 oss_period_size = 1 << runtime->oss.fragshift; 714 if (oss_period_size > oss_buffer_size / 2) 715 oss_period_size = oss_buffer_size / 2; 716 } else { 717 int sd; 718 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 719 720 oss_period_size = oss_buffer_size; 721 do { 722 oss_period_size /= 2; 723 } while (oss_period_size > bytes_per_sec); 724 if (runtime->oss.subdivision == 0) { 725 sd = 4; 726 if (oss_period_size / sd > 4096) 727 sd *= 2; 728 if (oss_period_size / sd < 4096) 729 sd = 1; 730 } else 731 sd = runtime->oss.subdivision; 732 oss_period_size /= sd; 733 if (oss_period_size < 16) 734 oss_period_size = 16; 735 } 736 737 min_period_size = snd_pcm_plug_client_size(substream, 738 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 739 if (min_period_size > 0) { 740 min_period_size *= oss_frame_size; 741 min_period_size = roundup_pow_of_two(min_period_size); 742 if (oss_period_size < min_period_size) 743 oss_period_size = min_period_size; 744 } 745 746 max_period_size = snd_pcm_plug_client_size(substream, 747 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 748 if (max_period_size > 0) { 749 max_period_size *= oss_frame_size; 750 max_period_size = rounddown_pow_of_two(max_period_size); 751 if (oss_period_size > max_period_size) 752 oss_period_size = max_period_size; 753 } 754 755 oss_periods = oss_buffer_size / oss_period_size; 756 757 if (substream->oss.setup.periods > 1) 758 oss_periods = substream->oss.setup.periods; 759 760 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 761 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags) 762 s = runtime->oss.maxfrags; 763 if (oss_periods > s) 764 oss_periods = s; 765 766 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 767 if (s < 2) 768 s = 2; 769 if (oss_periods < s) 770 oss_periods = s; 771 772 while (oss_period_size * oss_periods > oss_buffer_size) 773 oss_period_size /= 2; 774 775 if (oss_period_size < 16) 776 return -EINVAL; 777 runtime->oss.period_bytes = oss_period_size; 778 runtime->oss.period_frames = 1; 779 runtime->oss.periods = oss_periods; 780 return 0; 781 } 782 783 static int choose_rate(struct snd_pcm_substream *substream, 784 struct snd_pcm_hw_params *params, unsigned int best_rate) 785 { 786 const struct snd_interval *it; 787 struct snd_pcm_hw_params *save; 788 unsigned int rate, prev; 789 790 save = kmalloc(sizeof(*save), GFP_KERNEL); 791 if (save == NULL) 792 return -ENOMEM; 793 *save = *params; 794 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); 795 796 /* try multiples of the best rate */ 797 rate = best_rate; 798 for (;;) { 799 if (it->max < rate || (it->max == rate && it->openmax)) 800 break; 801 if (it->min < rate || (it->min == rate && !it->openmin)) { 802 int ret; 803 ret = snd_pcm_hw_param_set(substream, params, 804 SNDRV_PCM_HW_PARAM_RATE, 805 rate, 0); 806 if (ret == (int)rate) { 807 kfree(save); 808 return rate; 809 } 810 *params = *save; 811 } 812 prev = rate; 813 rate += best_rate; 814 if (rate <= prev) 815 break; 816 } 817 818 /* not found, use the nearest rate */ 819 kfree(save); 820 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 821 } 822 823 /* parameter locking: returns immediately if tried during streaming */ 824 static int lock_params(struct snd_pcm_runtime *runtime) 825 { 826 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 827 return -ERESTARTSYS; 828 if (atomic_read(&runtime->oss.rw_ref)) { 829 mutex_unlock(&runtime->oss.params_lock); 830 return -EBUSY; 831 } 832 return 0; 833 } 834 835 static void unlock_params(struct snd_pcm_runtime *runtime) 836 { 837 mutex_unlock(&runtime->oss.params_lock); 838 } 839 840 /* call with params_lock held */ 841 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) 842 { 843 struct snd_pcm_runtime *runtime = substream->runtime; 844 struct snd_pcm_hw_params *params, *sparams; 845 struct snd_pcm_sw_params *sw_params; 846 ssize_t oss_buffer_size, oss_period_size; 847 size_t oss_frame_size; 848 int err; 849 int direct; 850 snd_pcm_format_t format, sformat; 851 int n; 852 const struct snd_mask *sformat_mask; 853 struct snd_mask mask; 854 855 if (!runtime->oss.params) 856 return 0; 857 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 858 params = kmalloc(sizeof(*params), GFP_KERNEL); 859 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 860 if (!sw_params || !params || !sparams) { 861 err = -ENOMEM; 862 goto failure; 863 } 864 865 if (atomic_read(&substream->mmap_count)) 866 direct = 1; 867 else 868 direct = substream->oss.setup.direct; 869 870 _snd_pcm_hw_params_any(sparams); 871 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 872 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 873 snd_mask_none(&mask); 874 if (atomic_read(&substream->mmap_count)) 875 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 876 else { 877 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 878 if (!direct) 879 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 880 } 881 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 882 if (err < 0) { 883 pcm_dbg(substream->pcm, "No usable accesses\n"); 884 err = -EINVAL; 885 goto failure; 886 } 887 888 err = choose_rate(substream, sparams, runtime->oss.rate); 889 if (err < 0) 890 goto failure; 891 err = snd_pcm_hw_param_near(substream, sparams, 892 SNDRV_PCM_HW_PARAM_CHANNELS, 893 runtime->oss.channels, NULL); 894 if (err < 0) 895 goto failure; 896 897 format = snd_pcm_oss_format_from(runtime->oss.format); 898 899 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 900 if (direct) 901 sformat = format; 902 else 903 sformat = snd_pcm_plug_slave_format(format, sformat_mask); 904 905 if ((__force int)sformat < 0 || 906 !snd_mask_test_format(sformat_mask, sformat)) { 907 pcm_for_each_format(sformat) { 908 if (snd_mask_test_format(sformat_mask, sformat) && 909 snd_pcm_oss_format_to(sformat) >= 0) 910 goto format_found; 911 } 912 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 913 err = -EINVAL; 914 goto failure; 915 } 916 format_found: 917 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 918 if (err < 0) 919 goto failure; 920 921 if (direct) { 922 memcpy(params, sparams, sizeof(*params)); 923 } else { 924 _snd_pcm_hw_params_any(params); 925 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 926 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 927 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 928 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 929 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 930 runtime->oss.channels, 0); 931 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 932 runtime->oss.rate, 0); 933 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 934 params_access(params), params_format(params), 935 params_channels(params), params_rate(params)); 936 } 937 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 938 params_access(sparams), params_format(sparams), 939 params_channels(sparams), params_rate(sparams)); 940 941 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 942 params_channels(params) / 8; 943 944 err = snd_pcm_oss_period_size(substream, params, sparams); 945 if (err < 0) 946 goto failure; 947 948 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 949 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 950 if (err < 0) 951 goto failure; 952 953 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 954 runtime->oss.periods, NULL); 955 if (err < 0) 956 goto failure; 957 958 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 959 960 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams); 961 if (err < 0) { 962 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 963 goto failure; 964 } 965 966 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 967 snd_pcm_oss_plugin_clear(substream); 968 if (!direct) { 969 /* add necessary plugins */ 970 snd_pcm_oss_plugin_clear(substream); 971 err = snd_pcm_plug_format_plugins(substream, params, sparams); 972 if (err < 0) { 973 pcm_dbg(substream->pcm, 974 "snd_pcm_plug_format_plugins failed: %i\n", err); 975 snd_pcm_oss_plugin_clear(substream); 976 goto failure; 977 } 978 if (runtime->oss.plugin_first) { 979 struct snd_pcm_plugin *plugin; 980 err = snd_pcm_plugin_build_io(substream, sparams, &plugin); 981 if (err < 0) { 982 pcm_dbg(substream->pcm, 983 "snd_pcm_plugin_build_io failed: %i\n", err); 984 snd_pcm_oss_plugin_clear(substream); 985 goto failure; 986 } 987 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 988 err = snd_pcm_plugin_append(plugin); 989 } else { 990 err = snd_pcm_plugin_insert(plugin); 991 } 992 if (err < 0) { 993 snd_pcm_oss_plugin_clear(substream); 994 goto failure; 995 } 996 } 997 } 998 #endif 999 1000 if (runtime->oss.trigger) { 1001 sw_params->start_threshold = 1; 1002 } else { 1003 sw_params->start_threshold = runtime->boundary; 1004 } 1005 if (atomic_read(&substream->mmap_count) || 1006 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1007 sw_params->stop_threshold = runtime->boundary; 1008 else 1009 sw_params->stop_threshold = runtime->buffer_size; 1010 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1011 sw_params->period_step = 1; 1012 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1013 1 : runtime->period_size; 1014 if (atomic_read(&substream->mmap_count) || 1015 substream->oss.setup.nosilence) { 1016 sw_params->silence_threshold = 0; 1017 sw_params->silence_size = 0; 1018 } else { 1019 snd_pcm_uframes_t frames; 1020 frames = runtime->period_size + 16; 1021 if (frames > runtime->buffer_size) 1022 frames = runtime->buffer_size; 1023 sw_params->silence_threshold = frames; 1024 sw_params->silence_size = frames; 1025 } 1026 1027 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params); 1028 if (err < 0) { 1029 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1030 goto failure; 1031 } 1032 1033 runtime->oss.periods = params_periods(sparams); 1034 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1035 if (oss_period_size < 0) { 1036 err = -EINVAL; 1037 goto failure; 1038 } 1039 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1040 if (runtime->oss.plugin_first) { 1041 err = snd_pcm_plug_alloc(substream, oss_period_size); 1042 if (err < 0) 1043 goto failure; 1044 } 1045 #endif 1046 oss_period_size *= oss_frame_size; 1047 1048 oss_buffer_size = oss_period_size * runtime->oss.periods; 1049 if (oss_buffer_size < 0) { 1050 err = -EINVAL; 1051 goto failure; 1052 } 1053 1054 runtime->oss.period_bytes = oss_period_size; 1055 runtime->oss.buffer_bytes = oss_buffer_size; 1056 1057 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1058 runtime->oss.period_bytes, 1059 runtime->oss.buffer_bytes); 1060 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1061 params_period_size(sparams), 1062 params_buffer_size(sparams)); 1063 1064 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1065 runtime->oss.channels = params_channels(params); 1066 runtime->oss.rate = params_rate(params); 1067 1068 kvfree(runtime->oss.buffer); 1069 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL); 1070 if (!runtime->oss.buffer) { 1071 err = -ENOMEM; 1072 goto failure; 1073 } 1074 1075 runtime->oss.params = 0; 1076 runtime->oss.prepare = 1; 1077 runtime->oss.buffer_used = 0; 1078 if (runtime->dma_area) 1079 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1080 1081 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1082 1083 err = 0; 1084 failure: 1085 kfree(sw_params); 1086 kfree(params); 1087 kfree(sparams); 1088 return err; 1089 } 1090 1091 /* this one takes the lock by itself */ 1092 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 1093 bool trylock) 1094 { 1095 struct snd_pcm_runtime *runtime = substream->runtime; 1096 int err; 1097 1098 if (trylock) { 1099 if (!(mutex_trylock(&runtime->oss.params_lock))) 1100 return -EAGAIN; 1101 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1102 return -ERESTARTSYS; 1103 1104 err = snd_pcm_oss_change_params_locked(substream); 1105 mutex_unlock(&runtime->oss.params_lock); 1106 return err; 1107 } 1108 1109 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1110 { 1111 int idx, err; 1112 struct snd_pcm_substream *asubstream = NULL, *substream; 1113 1114 for (idx = 0; idx < 2; idx++) { 1115 substream = pcm_oss_file->streams[idx]; 1116 if (substream == NULL) 1117 continue; 1118 if (asubstream == NULL) 1119 asubstream = substream; 1120 if (substream->runtime->oss.params) { 1121 err = snd_pcm_oss_change_params(substream, false); 1122 if (err < 0) 1123 return err; 1124 } 1125 } 1126 if (!asubstream) 1127 return -EIO; 1128 if (r_substream) 1129 *r_substream = asubstream; 1130 return 0; 1131 } 1132 1133 /* call with params_lock held */ 1134 /* NOTE: this always call PREPARE unconditionally no matter whether 1135 * runtime->oss.prepare is set or not 1136 */ 1137 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1138 { 1139 int err; 1140 struct snd_pcm_runtime *runtime = substream->runtime; 1141 1142 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1143 if (err < 0) { 1144 pcm_dbg(substream->pcm, 1145 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1146 return err; 1147 } 1148 runtime->oss.prepare = 0; 1149 runtime->oss.prev_hw_ptr_period = 0; 1150 runtime->oss.period_ptr = 0; 1151 runtime->oss.buffer_used = 0; 1152 1153 return 0; 1154 } 1155 1156 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1157 { 1158 struct snd_pcm_runtime *runtime; 1159 int err; 1160 1161 runtime = substream->runtime; 1162 if (runtime->oss.params) { 1163 err = snd_pcm_oss_change_params(substream, false); 1164 if (err < 0) 1165 return err; 1166 } 1167 if (runtime->oss.prepare) { 1168 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1169 return -ERESTARTSYS; 1170 err = snd_pcm_oss_prepare(substream); 1171 mutex_unlock(&runtime->oss.params_lock); 1172 if (err < 0) 1173 return err; 1174 } 1175 return 0; 1176 } 1177 1178 /* call with params_lock held */ 1179 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) 1180 { 1181 struct snd_pcm_runtime *runtime; 1182 int err; 1183 1184 runtime = substream->runtime; 1185 if (runtime->oss.params) { 1186 err = snd_pcm_oss_change_params_locked(substream); 1187 if (err < 0) 1188 return err; 1189 } 1190 if (runtime->oss.prepare) { 1191 err = snd_pcm_oss_prepare(substream); 1192 if (err < 0) 1193 return err; 1194 } 1195 return 0; 1196 } 1197 1198 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1199 { 1200 struct snd_pcm_runtime *runtime; 1201 snd_pcm_uframes_t frames; 1202 int err = 0; 1203 1204 while (1) { 1205 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1206 if (err < 0) 1207 break; 1208 runtime = substream->runtime; 1209 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1210 break; 1211 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1212 /* until avail(delay) <= buffer_size */ 1213 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1214 frames /= runtime->period_size; 1215 frames *= runtime->period_size; 1216 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1217 if (err < 0) 1218 break; 1219 } 1220 return err; 1221 } 1222 1223 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1224 { 1225 struct snd_pcm_runtime *runtime = substream->runtime; 1226 int ret; 1227 while (1) { 1228 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1229 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1230 #ifdef OSS_DEBUG 1231 pcm_dbg(substream->pcm, 1232 "pcm_oss: write: recovering from %s\n", 1233 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1234 "XRUN" : "SUSPEND"); 1235 #endif 1236 ret = snd_pcm_oss_prepare(substream); 1237 if (ret < 0) 1238 break; 1239 } 1240 mutex_unlock(&runtime->oss.params_lock); 1241 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1242 frames, in_kernel); 1243 mutex_lock(&runtime->oss.params_lock); 1244 if (ret != -EPIPE && ret != -ESTRPIPE) 1245 break; 1246 /* test, if we can't store new data, because the stream */ 1247 /* has not been started */ 1248 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1249 return -EAGAIN; 1250 } 1251 return ret; 1252 } 1253 1254 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1255 { 1256 struct snd_pcm_runtime *runtime = substream->runtime; 1257 snd_pcm_sframes_t delay; 1258 int ret; 1259 while (1) { 1260 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1261 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1262 #ifdef OSS_DEBUG 1263 pcm_dbg(substream->pcm, 1264 "pcm_oss: read: recovering from %s\n", 1265 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1266 "XRUN" : "SUSPEND"); 1267 #endif 1268 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1269 if (ret < 0) 1270 break; 1271 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1272 ret = snd_pcm_oss_prepare(substream); 1273 if (ret < 0) 1274 break; 1275 } 1276 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1277 if (ret < 0) 1278 break; 1279 mutex_unlock(&runtime->oss.params_lock); 1280 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1281 frames, in_kernel); 1282 mutex_lock(&runtime->oss.params_lock); 1283 if (ret == -EPIPE) { 1284 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1285 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1286 if (ret < 0) 1287 break; 1288 } 1289 continue; 1290 } 1291 if (ret != -ESTRPIPE) 1292 break; 1293 } 1294 return ret; 1295 } 1296 1297 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1298 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1299 { 1300 struct snd_pcm_runtime *runtime = substream->runtime; 1301 int ret; 1302 while (1) { 1303 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1304 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1305 #ifdef OSS_DEBUG 1306 pcm_dbg(substream->pcm, 1307 "pcm_oss: writev: recovering from %s\n", 1308 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1309 "XRUN" : "SUSPEND"); 1310 #endif 1311 ret = snd_pcm_oss_prepare(substream); 1312 if (ret < 0) 1313 break; 1314 } 1315 ret = snd_pcm_kernel_writev(substream, bufs, frames); 1316 if (ret != -EPIPE && ret != -ESTRPIPE) 1317 break; 1318 1319 /* test, if we can't store new data, because the stream */ 1320 /* has not been started */ 1321 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1322 return -EAGAIN; 1323 } 1324 return ret; 1325 } 1326 1327 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1328 { 1329 struct snd_pcm_runtime *runtime = substream->runtime; 1330 int ret; 1331 while (1) { 1332 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1333 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1334 #ifdef OSS_DEBUG 1335 pcm_dbg(substream->pcm, 1336 "pcm_oss: readv: recovering from %s\n", 1337 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1338 "XRUN" : "SUSPEND"); 1339 #endif 1340 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1341 if (ret < 0) 1342 break; 1343 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1344 ret = snd_pcm_oss_prepare(substream); 1345 if (ret < 0) 1346 break; 1347 } 1348 ret = snd_pcm_kernel_readv(substream, bufs, frames); 1349 if (ret != -EPIPE && ret != -ESTRPIPE) 1350 break; 1351 } 1352 return ret; 1353 } 1354 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 1355 1356 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1357 { 1358 struct snd_pcm_runtime *runtime = substream->runtime; 1359 snd_pcm_sframes_t frames, frames1; 1360 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1361 if (runtime->oss.plugin_first) { 1362 struct snd_pcm_plugin_channel *channels; 1363 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1364 if (!in_kernel) { 1365 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1366 return -EFAULT; 1367 buf = runtime->oss.buffer; 1368 } 1369 frames = bytes / oss_frame_bytes; 1370 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1371 if (frames1 < 0) 1372 return frames1; 1373 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1374 if (frames1 <= 0) 1375 return frames1; 1376 bytes = frames1 * oss_frame_bytes; 1377 } else 1378 #endif 1379 { 1380 frames = bytes_to_frames(runtime, bytes); 1381 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1382 if (frames1 <= 0) 1383 return frames1; 1384 bytes = frames_to_bytes(runtime, frames1); 1385 } 1386 return bytes; 1387 } 1388 1389 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1390 { 1391 size_t xfer = 0; 1392 ssize_t tmp = 0; 1393 struct snd_pcm_runtime *runtime = substream->runtime; 1394 1395 if (atomic_read(&substream->mmap_count)) 1396 return -ENXIO; 1397 1398 atomic_inc(&runtime->oss.rw_ref); 1399 while (bytes > 0) { 1400 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1401 tmp = -ERESTARTSYS; 1402 break; 1403 } 1404 tmp = snd_pcm_oss_make_ready_locked(substream); 1405 if (tmp < 0) 1406 goto err; 1407 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1408 tmp = bytes; 1409 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1410 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1411 if (tmp > 0) { 1412 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1413 tmp = -EFAULT; 1414 goto err; 1415 } 1416 } 1417 runtime->oss.buffer_used += tmp; 1418 buf += tmp; 1419 bytes -= tmp; 1420 xfer += tmp; 1421 if (substream->oss.setup.partialfrag || 1422 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1423 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1424 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1425 if (tmp <= 0) 1426 goto err; 1427 runtime->oss.bytes += tmp; 1428 runtime->oss.period_ptr += tmp; 1429 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1430 if (runtime->oss.period_ptr == 0 || 1431 runtime->oss.period_ptr == runtime->oss.buffer_used) 1432 runtime->oss.buffer_used = 0; 1433 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1434 tmp = -EAGAIN; 1435 goto err; 1436 } 1437 } 1438 } else { 1439 tmp = snd_pcm_oss_write2(substream, 1440 (const char __force *)buf, 1441 runtime->oss.period_bytes, 0); 1442 if (tmp <= 0) 1443 goto err; 1444 runtime->oss.bytes += tmp; 1445 buf += tmp; 1446 bytes -= tmp; 1447 xfer += tmp; 1448 if ((substream->f_flags & O_NONBLOCK) != 0 && 1449 tmp != runtime->oss.period_bytes) 1450 tmp = -EAGAIN; 1451 } 1452 err: 1453 mutex_unlock(&runtime->oss.params_lock); 1454 if (tmp < 0) 1455 break; 1456 if (signal_pending(current)) { 1457 tmp = -ERESTARTSYS; 1458 break; 1459 } 1460 tmp = 0; 1461 } 1462 atomic_dec(&runtime->oss.rw_ref); 1463 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1464 } 1465 1466 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1467 { 1468 struct snd_pcm_runtime *runtime = substream->runtime; 1469 snd_pcm_sframes_t frames, frames1; 1470 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1471 char __user *final_dst = (char __force __user *)buf; 1472 if (runtime->oss.plugin_first) { 1473 struct snd_pcm_plugin_channel *channels; 1474 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1475 if (!in_kernel) 1476 buf = runtime->oss.buffer; 1477 frames = bytes / oss_frame_bytes; 1478 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1479 if (frames1 < 0) 1480 return frames1; 1481 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1482 if (frames1 <= 0) 1483 return frames1; 1484 bytes = frames1 * oss_frame_bytes; 1485 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1486 return -EFAULT; 1487 } else 1488 #endif 1489 { 1490 frames = bytes_to_frames(runtime, bytes); 1491 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1492 if (frames1 <= 0) 1493 return frames1; 1494 bytes = frames_to_bytes(runtime, frames1); 1495 } 1496 return bytes; 1497 } 1498 1499 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1500 { 1501 size_t xfer = 0; 1502 ssize_t tmp = 0; 1503 struct snd_pcm_runtime *runtime = substream->runtime; 1504 1505 if (atomic_read(&substream->mmap_count)) 1506 return -ENXIO; 1507 1508 atomic_inc(&runtime->oss.rw_ref); 1509 while (bytes > 0) { 1510 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1511 tmp = -ERESTARTSYS; 1512 break; 1513 } 1514 tmp = snd_pcm_oss_make_ready_locked(substream); 1515 if (tmp < 0) 1516 goto err; 1517 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1518 if (runtime->oss.buffer_used == 0) { 1519 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1520 if (tmp <= 0) 1521 goto err; 1522 runtime->oss.bytes += tmp; 1523 runtime->oss.period_ptr = tmp; 1524 runtime->oss.buffer_used = tmp; 1525 } 1526 tmp = bytes; 1527 if ((size_t) tmp > runtime->oss.buffer_used) 1528 tmp = runtime->oss.buffer_used; 1529 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1530 tmp = -EFAULT; 1531 goto err; 1532 } 1533 buf += tmp; 1534 bytes -= tmp; 1535 xfer += tmp; 1536 runtime->oss.buffer_used -= tmp; 1537 } else { 1538 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1539 runtime->oss.period_bytes, 0); 1540 if (tmp <= 0) 1541 goto err; 1542 runtime->oss.bytes += tmp; 1543 buf += tmp; 1544 bytes -= tmp; 1545 xfer += tmp; 1546 } 1547 err: 1548 mutex_unlock(&runtime->oss.params_lock); 1549 if (tmp < 0) 1550 break; 1551 if (signal_pending(current)) { 1552 tmp = -ERESTARTSYS; 1553 break; 1554 } 1555 tmp = 0; 1556 } 1557 atomic_dec(&runtime->oss.rw_ref); 1558 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1559 } 1560 1561 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1562 { 1563 struct snd_pcm_substream *substream; 1564 struct snd_pcm_runtime *runtime; 1565 int i; 1566 1567 for (i = 0; i < 2; i++) { 1568 substream = pcm_oss_file->streams[i]; 1569 if (!substream) 1570 continue; 1571 runtime = substream->runtime; 1572 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1573 mutex_lock(&runtime->oss.params_lock); 1574 runtime->oss.prepare = 1; 1575 runtime->oss.buffer_used = 0; 1576 runtime->oss.prev_hw_ptr_period = 0; 1577 runtime->oss.period_ptr = 0; 1578 mutex_unlock(&runtime->oss.params_lock); 1579 } 1580 return 0; 1581 } 1582 1583 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1584 { 1585 struct snd_pcm_substream *substream; 1586 int err; 1587 1588 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1589 if (substream != NULL) { 1590 err = snd_pcm_oss_make_ready(substream); 1591 if (err < 0) 1592 return err; 1593 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1594 } 1595 /* note: all errors from the start action are ignored */ 1596 /* OSS apps do not know, how to handle them */ 1597 return 0; 1598 } 1599 1600 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1601 { 1602 struct snd_pcm_runtime *runtime; 1603 ssize_t result = 0; 1604 snd_pcm_state_t state; 1605 long res; 1606 wait_queue_entry_t wait; 1607 1608 runtime = substream->runtime; 1609 init_waitqueue_entry(&wait, current); 1610 add_wait_queue(&runtime->sleep, &wait); 1611 #ifdef OSS_DEBUG 1612 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1613 #endif 1614 while (1) { 1615 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1616 if (result > 0) { 1617 runtime->oss.buffer_used = 0; 1618 result = 0; 1619 break; 1620 } 1621 if (result != 0 && result != -EAGAIN) 1622 break; 1623 result = 0; 1624 set_current_state(TASK_INTERRUPTIBLE); 1625 snd_pcm_stream_lock_irq(substream); 1626 state = runtime->status->state; 1627 snd_pcm_stream_unlock_irq(substream); 1628 if (state != SNDRV_PCM_STATE_RUNNING) { 1629 set_current_state(TASK_RUNNING); 1630 break; 1631 } 1632 res = schedule_timeout(10 * HZ); 1633 if (signal_pending(current)) { 1634 result = -ERESTARTSYS; 1635 break; 1636 } 1637 if (res == 0) { 1638 pcm_err(substream->pcm, 1639 "OSS sync error - DMA timeout\n"); 1640 result = -EIO; 1641 break; 1642 } 1643 } 1644 remove_wait_queue(&runtime->sleep, &wait); 1645 return result; 1646 } 1647 1648 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1649 { 1650 int err = 0; 1651 unsigned int saved_f_flags; 1652 struct snd_pcm_substream *substream; 1653 struct snd_pcm_runtime *runtime; 1654 snd_pcm_format_t format; 1655 unsigned long width; 1656 size_t size; 1657 1658 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1659 if (substream != NULL) { 1660 runtime = substream->runtime; 1661 if (atomic_read(&substream->mmap_count)) 1662 goto __direct; 1663 err = snd_pcm_oss_make_ready(substream); 1664 if (err < 0) 1665 return err; 1666 atomic_inc(&runtime->oss.rw_ref); 1667 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1668 atomic_dec(&runtime->oss.rw_ref); 1669 return -ERESTARTSYS; 1670 } 1671 format = snd_pcm_oss_format_from(runtime->oss.format); 1672 width = snd_pcm_format_physical_width(format); 1673 if (runtime->oss.buffer_used > 0) { 1674 #ifdef OSS_DEBUG 1675 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1676 #endif 1677 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1678 snd_pcm_format_set_silence(format, 1679 runtime->oss.buffer + runtime->oss.buffer_used, 1680 size); 1681 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1682 if (err < 0) 1683 goto unlock; 1684 } else if (runtime->oss.period_ptr > 0) { 1685 #ifdef OSS_DEBUG 1686 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1687 #endif 1688 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1689 snd_pcm_format_set_silence(format, 1690 runtime->oss.buffer, 1691 size * 8 / width); 1692 err = snd_pcm_oss_sync1(substream, size); 1693 if (err < 0) 1694 goto unlock; 1695 } 1696 /* 1697 * The ALSA's period might be a bit large than OSS one. 1698 * Fill the remain portion of ALSA period with zeros. 1699 */ 1700 size = runtime->control->appl_ptr % runtime->period_size; 1701 if (size > 0) { 1702 size = runtime->period_size - size; 1703 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) 1704 snd_pcm_lib_write(substream, NULL, size); 1705 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 1706 snd_pcm_lib_writev(substream, NULL, size); 1707 } 1708 unlock: 1709 mutex_unlock(&runtime->oss.params_lock); 1710 atomic_dec(&runtime->oss.rw_ref); 1711 if (err < 0) 1712 return err; 1713 /* 1714 * finish sync: drain the buffer 1715 */ 1716 __direct: 1717 saved_f_flags = substream->f_flags; 1718 substream->f_flags &= ~O_NONBLOCK; 1719 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1720 substream->f_flags = saved_f_flags; 1721 if (err < 0) 1722 return err; 1723 mutex_lock(&runtime->oss.params_lock); 1724 runtime->oss.prepare = 1; 1725 mutex_unlock(&runtime->oss.params_lock); 1726 } 1727 1728 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1729 if (substream != NULL) { 1730 err = snd_pcm_oss_make_ready(substream); 1731 if (err < 0) 1732 return err; 1733 runtime = substream->runtime; 1734 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1735 if (err < 0) 1736 return err; 1737 mutex_lock(&runtime->oss.params_lock); 1738 runtime->oss.buffer_used = 0; 1739 runtime->oss.prepare = 1; 1740 mutex_unlock(&runtime->oss.params_lock); 1741 } 1742 return 0; 1743 } 1744 1745 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1746 { 1747 int idx; 1748 1749 for (idx = 1; idx >= 0; --idx) { 1750 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1751 struct snd_pcm_runtime *runtime; 1752 int err; 1753 1754 if (substream == NULL) 1755 continue; 1756 runtime = substream->runtime; 1757 if (rate < 1000) 1758 rate = 1000; 1759 else if (rate > 192000) 1760 rate = 192000; 1761 err = lock_params(runtime); 1762 if (err < 0) 1763 return err; 1764 if (runtime->oss.rate != rate) { 1765 runtime->oss.params = 1; 1766 runtime->oss.rate = rate; 1767 } 1768 unlock_params(runtime); 1769 } 1770 return snd_pcm_oss_get_rate(pcm_oss_file); 1771 } 1772 1773 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1774 { 1775 struct snd_pcm_substream *substream; 1776 int err; 1777 1778 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1779 if (err < 0) 1780 return err; 1781 return substream->runtime->oss.rate; 1782 } 1783 1784 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1785 { 1786 int idx; 1787 if (channels < 1) 1788 channels = 1; 1789 if (channels > 128) 1790 return -EINVAL; 1791 for (idx = 1; idx >= 0; --idx) { 1792 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1793 struct snd_pcm_runtime *runtime; 1794 int err; 1795 1796 if (substream == NULL) 1797 continue; 1798 runtime = substream->runtime; 1799 err = lock_params(runtime); 1800 if (err < 0) 1801 return err; 1802 if (runtime->oss.channels != channels) { 1803 runtime->oss.params = 1; 1804 runtime->oss.channels = channels; 1805 } 1806 unlock_params(runtime); 1807 } 1808 return snd_pcm_oss_get_channels(pcm_oss_file); 1809 } 1810 1811 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1812 { 1813 struct snd_pcm_substream *substream; 1814 int err; 1815 1816 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1817 if (err < 0) 1818 return err; 1819 return substream->runtime->oss.channels; 1820 } 1821 1822 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1823 { 1824 struct snd_pcm_substream *substream; 1825 int err; 1826 1827 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1828 if (err < 0) 1829 return err; 1830 return substream->runtime->oss.period_bytes; 1831 } 1832 1833 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1834 { 1835 struct snd_pcm_substream *substream; 1836 int err; 1837 int direct; 1838 struct snd_pcm_hw_params *params; 1839 unsigned int formats = 0; 1840 const struct snd_mask *format_mask; 1841 int fmt; 1842 1843 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1844 if (err < 0) 1845 return err; 1846 if (atomic_read(&substream->mmap_count)) 1847 direct = 1; 1848 else 1849 direct = substream->oss.setup.direct; 1850 if (!direct) 1851 return AFMT_MU_LAW | AFMT_U8 | 1852 AFMT_S16_LE | AFMT_S16_BE | 1853 AFMT_S8 | AFMT_U16_LE | 1854 AFMT_U16_BE | 1855 AFMT_S32_LE | AFMT_S32_BE | 1856 AFMT_S24_LE | AFMT_S24_BE | 1857 AFMT_S24_PACKED; 1858 params = kmalloc(sizeof(*params), GFP_KERNEL); 1859 if (!params) 1860 return -ENOMEM; 1861 _snd_pcm_hw_params_any(params); 1862 err = snd_pcm_hw_refine(substream, params); 1863 if (err < 0) 1864 goto error; 1865 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); 1866 for (fmt = 0; fmt < 32; ++fmt) { 1867 if (snd_mask_test(format_mask, fmt)) { 1868 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); 1869 if (f >= 0) 1870 formats |= f; 1871 } 1872 } 1873 1874 error: 1875 kfree(params); 1876 return err < 0 ? err : formats; 1877 } 1878 1879 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1880 { 1881 int formats, idx; 1882 int err; 1883 1884 if (format != AFMT_QUERY) { 1885 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1886 if (formats < 0) 1887 return formats; 1888 if (!(formats & format)) 1889 format = AFMT_U8; 1890 for (idx = 1; idx >= 0; --idx) { 1891 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1892 struct snd_pcm_runtime *runtime; 1893 if (substream == NULL) 1894 continue; 1895 runtime = substream->runtime; 1896 err = lock_params(runtime); 1897 if (err < 0) 1898 return err; 1899 if (runtime->oss.format != format) { 1900 runtime->oss.params = 1; 1901 runtime->oss.format = format; 1902 } 1903 unlock_params(runtime); 1904 } 1905 } 1906 return snd_pcm_oss_get_format(pcm_oss_file); 1907 } 1908 1909 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1910 { 1911 struct snd_pcm_substream *substream; 1912 int err; 1913 1914 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1915 if (err < 0) 1916 return err; 1917 return substream->runtime->oss.format; 1918 } 1919 1920 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1921 { 1922 struct snd_pcm_runtime *runtime; 1923 1924 runtime = substream->runtime; 1925 if (subdivide == 0) { 1926 subdivide = runtime->oss.subdivision; 1927 if (subdivide == 0) 1928 subdivide = 1; 1929 return subdivide; 1930 } 1931 if (runtime->oss.subdivision || runtime->oss.fragshift) 1932 return -EINVAL; 1933 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1934 subdivide != 8 && subdivide != 16) 1935 return -EINVAL; 1936 runtime->oss.subdivision = subdivide; 1937 runtime->oss.params = 1; 1938 return subdivide; 1939 } 1940 1941 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1942 { 1943 int err = -EINVAL, idx; 1944 1945 for (idx = 1; idx >= 0; --idx) { 1946 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1947 struct snd_pcm_runtime *runtime; 1948 1949 if (substream == NULL) 1950 continue; 1951 runtime = substream->runtime; 1952 err = lock_params(runtime); 1953 if (err < 0) 1954 return err; 1955 err = snd_pcm_oss_set_subdivide1(substream, subdivide); 1956 unlock_params(runtime); 1957 if (err < 0) 1958 return err; 1959 } 1960 return err; 1961 } 1962 1963 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1964 { 1965 struct snd_pcm_runtime *runtime; 1966 int fragshift; 1967 1968 runtime = substream->runtime; 1969 if (runtime->oss.subdivision || runtime->oss.fragshift) 1970 return -EINVAL; 1971 fragshift = val & 0xffff; 1972 if (fragshift >= 25) /* should be large enough */ 1973 return -EINVAL; 1974 runtime->oss.fragshift = fragshift; 1975 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1976 if (runtime->oss.fragshift < 4) /* < 16 */ 1977 runtime->oss.fragshift = 4; 1978 if (runtime->oss.maxfrags < 2) 1979 runtime->oss.maxfrags = 2; 1980 runtime->oss.params = 1; 1981 return 0; 1982 } 1983 1984 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1985 { 1986 int err = -EINVAL, idx; 1987 1988 for (idx = 1; idx >= 0; --idx) { 1989 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1990 struct snd_pcm_runtime *runtime; 1991 1992 if (substream == NULL) 1993 continue; 1994 runtime = substream->runtime; 1995 err = lock_params(runtime); 1996 if (err < 0) 1997 return err; 1998 err = snd_pcm_oss_set_fragment1(substream, val); 1999 unlock_params(runtime); 2000 if (err < 0) 2001 return err; 2002 } 2003 return err; 2004 } 2005 2006 static int snd_pcm_oss_nonblock(struct file * file) 2007 { 2008 spin_lock(&file->f_lock); 2009 file->f_flags |= O_NONBLOCK; 2010 spin_unlock(&file->f_lock); 2011 return 0; 2012 } 2013 2014 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 2015 { 2016 2017 if (substream == NULL) { 2018 res &= ~DSP_CAP_DUPLEX; 2019 return res; 2020 } 2021 #ifdef DSP_CAP_MULTI 2022 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2023 if (substream->pstr->substream_count > 1) 2024 res |= DSP_CAP_MULTI; 2025 #endif 2026 /* DSP_CAP_REALTIME is set all times: */ 2027 /* all ALSA drivers can return actual pointer in ring buffer */ 2028 #if defined(DSP_CAP_REALTIME) && 0 2029 { 2030 struct snd_pcm_runtime *runtime = substream->runtime; 2031 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 2032 res &= ~DSP_CAP_REALTIME; 2033 } 2034 #endif 2035 return res; 2036 } 2037 2038 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 2039 { 2040 int result, idx; 2041 2042 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 2043 for (idx = 0; idx < 2; idx++) { 2044 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 2045 result = snd_pcm_oss_get_caps1(substream, result); 2046 } 2047 result |= 0x0001; /* revision - same as SB AWE 64 */ 2048 return result; 2049 } 2050 2051 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 2052 snd_pcm_uframes_t hw_ptr) 2053 { 2054 struct snd_pcm_runtime *runtime = substream->runtime; 2055 snd_pcm_uframes_t appl_ptr; 2056 appl_ptr = hw_ptr + runtime->buffer_size; 2057 appl_ptr %= runtime->boundary; 2058 runtime->control->appl_ptr = appl_ptr; 2059 } 2060 2061 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 2062 { 2063 struct snd_pcm_runtime *runtime; 2064 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2065 int err, cmd; 2066 2067 #ifdef OSS_DEBUG 2068 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 2069 #endif 2070 2071 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2072 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2073 2074 if (psubstream) { 2075 err = snd_pcm_oss_make_ready(psubstream); 2076 if (err < 0) 2077 return err; 2078 } 2079 if (csubstream) { 2080 err = snd_pcm_oss_make_ready(csubstream); 2081 if (err < 0) 2082 return err; 2083 } 2084 if (psubstream) { 2085 runtime = psubstream->runtime; 2086 cmd = 0; 2087 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2088 return -ERESTARTSYS; 2089 if (trigger & PCM_ENABLE_OUTPUT) { 2090 if (runtime->oss.trigger) 2091 goto _skip1; 2092 if (atomic_read(&psubstream->mmap_count)) 2093 snd_pcm_oss_simulate_fill(psubstream, 2094 get_hw_ptr_period(runtime)); 2095 runtime->oss.trigger = 1; 2096 runtime->start_threshold = 1; 2097 cmd = SNDRV_PCM_IOCTL_START; 2098 } else { 2099 if (!runtime->oss.trigger) 2100 goto _skip1; 2101 runtime->oss.trigger = 0; 2102 runtime->start_threshold = runtime->boundary; 2103 cmd = SNDRV_PCM_IOCTL_DROP; 2104 runtime->oss.prepare = 1; 2105 } 2106 _skip1: 2107 mutex_unlock(&runtime->oss.params_lock); 2108 if (cmd) { 2109 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2110 if (err < 0) 2111 return err; 2112 } 2113 } 2114 if (csubstream) { 2115 runtime = csubstream->runtime; 2116 cmd = 0; 2117 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2118 return -ERESTARTSYS; 2119 if (trigger & PCM_ENABLE_INPUT) { 2120 if (runtime->oss.trigger) 2121 goto _skip2; 2122 runtime->oss.trigger = 1; 2123 runtime->start_threshold = 1; 2124 cmd = SNDRV_PCM_IOCTL_START; 2125 } else { 2126 if (!runtime->oss.trigger) 2127 goto _skip2; 2128 runtime->oss.trigger = 0; 2129 runtime->start_threshold = runtime->boundary; 2130 cmd = SNDRV_PCM_IOCTL_DROP; 2131 runtime->oss.prepare = 1; 2132 } 2133 _skip2: 2134 mutex_unlock(&runtime->oss.params_lock); 2135 if (cmd) { 2136 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2137 if (err < 0) 2138 return err; 2139 } 2140 } 2141 return 0; 2142 } 2143 2144 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2145 { 2146 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2147 int result = 0; 2148 2149 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2150 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2151 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2152 result |= PCM_ENABLE_OUTPUT; 2153 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2154 result |= PCM_ENABLE_INPUT; 2155 return result; 2156 } 2157 2158 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2159 { 2160 struct snd_pcm_substream *substream; 2161 struct snd_pcm_runtime *runtime; 2162 snd_pcm_sframes_t delay; 2163 int err; 2164 2165 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2166 if (substream == NULL) 2167 return -EINVAL; 2168 err = snd_pcm_oss_make_ready(substream); 2169 if (err < 0) 2170 return err; 2171 runtime = substream->runtime; 2172 if (runtime->oss.params || runtime->oss.prepare) 2173 return 0; 2174 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2175 if (err == -EPIPE) 2176 delay = 0; /* hack for broken OSS applications */ 2177 else if (err < 0) 2178 return err; 2179 return snd_pcm_oss_bytes(substream, delay); 2180 } 2181 2182 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2183 { 2184 struct snd_pcm_substream *substream; 2185 struct snd_pcm_runtime *runtime; 2186 snd_pcm_sframes_t delay; 2187 int fixup; 2188 struct count_info info; 2189 int err; 2190 2191 if (_info == NULL) 2192 return -EFAULT; 2193 substream = pcm_oss_file->streams[stream]; 2194 if (substream == NULL) 2195 return -EINVAL; 2196 err = snd_pcm_oss_make_ready(substream); 2197 if (err < 0) 2198 return err; 2199 runtime = substream->runtime; 2200 if (runtime->oss.params || runtime->oss.prepare) { 2201 memset(&info, 0, sizeof(info)); 2202 if (copy_to_user(_info, &info, sizeof(info))) 2203 return -EFAULT; 2204 return 0; 2205 } 2206 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2207 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2208 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2209 err = 0; 2210 delay = 0; 2211 fixup = 0; 2212 } else { 2213 fixup = runtime->oss.buffer_used; 2214 } 2215 } else { 2216 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2217 fixup = -runtime->oss.buffer_used; 2218 } 2219 if (err < 0) 2220 return err; 2221 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2222 if (atomic_read(&substream->mmap_count)) { 2223 snd_pcm_sframes_t n; 2224 delay = get_hw_ptr_period(runtime); 2225 n = delay - runtime->oss.prev_hw_ptr_period; 2226 if (n < 0) 2227 n += runtime->boundary; 2228 info.blocks = n / runtime->period_size; 2229 runtime->oss.prev_hw_ptr_period = delay; 2230 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2231 snd_pcm_oss_simulate_fill(substream, delay); 2232 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2233 } else { 2234 delay = snd_pcm_oss_bytes(substream, delay); 2235 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2236 if (substream->oss.setup.buggyptr) 2237 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2238 else 2239 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2240 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2241 } else { 2242 delay += fixup; 2243 info.blocks = delay / runtime->oss.period_bytes; 2244 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2245 } 2246 } 2247 if (copy_to_user(_info, &info, sizeof(info))) 2248 return -EFAULT; 2249 return 0; 2250 } 2251 2252 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2253 { 2254 struct snd_pcm_substream *substream; 2255 struct snd_pcm_runtime *runtime; 2256 snd_pcm_sframes_t avail; 2257 int fixup; 2258 struct audio_buf_info info; 2259 int err; 2260 2261 if (_info == NULL) 2262 return -EFAULT; 2263 substream = pcm_oss_file->streams[stream]; 2264 if (substream == NULL) 2265 return -EINVAL; 2266 runtime = substream->runtime; 2267 2268 if (runtime->oss.params) { 2269 err = snd_pcm_oss_change_params(substream, false); 2270 if (err < 0) 2271 return err; 2272 } 2273 2274 info.fragsize = runtime->oss.period_bytes; 2275 info.fragstotal = runtime->periods; 2276 if (runtime->oss.prepare) { 2277 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2278 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2279 info.fragments = runtime->oss.periods; 2280 } else { 2281 info.bytes = 0; 2282 info.fragments = 0; 2283 } 2284 } else { 2285 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2286 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2287 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2288 avail = runtime->buffer_size; 2289 err = 0; 2290 fixup = 0; 2291 } else { 2292 avail = runtime->buffer_size - avail; 2293 fixup = -runtime->oss.buffer_used; 2294 } 2295 } else { 2296 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2297 fixup = runtime->oss.buffer_used; 2298 } 2299 if (err < 0) 2300 return err; 2301 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2302 info.fragments = info.bytes / runtime->oss.period_bytes; 2303 } 2304 2305 #ifdef OSS_DEBUG 2306 pcm_dbg(substream->pcm, 2307 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2308 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2309 #endif 2310 if (copy_to_user(_info, &info, sizeof(info))) 2311 return -EFAULT; 2312 return 0; 2313 } 2314 2315 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2316 { 2317 // it won't be probably implemented 2318 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2319 return -EINVAL; 2320 } 2321 2322 static const char *strip_task_path(const char *path) 2323 { 2324 const char *ptr, *ptrl = NULL; 2325 for (ptr = path; *ptr; ptr++) { 2326 if (*ptr == '/') 2327 ptrl = ptr + 1; 2328 } 2329 return ptrl; 2330 } 2331 2332 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2333 const char *task_name, 2334 struct snd_pcm_oss_setup *rsetup) 2335 { 2336 struct snd_pcm_oss_setup *setup; 2337 2338 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2339 do { 2340 for (setup = pcm->streams[stream].oss.setup_list; setup; 2341 setup = setup->next) { 2342 if (!strcmp(setup->task_name, task_name)) 2343 goto out; 2344 } 2345 } while ((task_name = strip_task_path(task_name)) != NULL); 2346 out: 2347 if (setup) 2348 *rsetup = *setup; 2349 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2350 } 2351 2352 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2353 { 2354 struct snd_pcm_runtime *runtime; 2355 runtime = substream->runtime; 2356 kvfree(runtime->oss.buffer); 2357 runtime->oss.buffer = NULL; 2358 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2359 snd_pcm_oss_plugin_clear(substream); 2360 #endif 2361 substream->oss.oss = 0; 2362 } 2363 2364 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2365 struct snd_pcm_oss_setup *setup, 2366 int minor) 2367 { 2368 struct snd_pcm_runtime *runtime; 2369 2370 substream->oss.oss = 1; 2371 substream->oss.setup = *setup; 2372 if (setup->nonblock) 2373 substream->f_flags |= O_NONBLOCK; 2374 else if (setup->block) 2375 substream->f_flags &= ~O_NONBLOCK; 2376 runtime = substream->runtime; 2377 runtime->oss.params = 1; 2378 runtime->oss.trigger = 1; 2379 runtime->oss.rate = 8000; 2380 mutex_init(&runtime->oss.params_lock); 2381 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2382 case SNDRV_MINOR_OSS_PCM_8: 2383 runtime->oss.format = AFMT_U8; 2384 break; 2385 case SNDRV_MINOR_OSS_PCM_16: 2386 runtime->oss.format = AFMT_S16_LE; 2387 break; 2388 default: 2389 runtime->oss.format = AFMT_MU_LAW; 2390 } 2391 runtime->oss.channels = 1; 2392 runtime->oss.fragshift = 0; 2393 runtime->oss.maxfrags = 0; 2394 runtime->oss.subdivision = 0; 2395 substream->pcm_release = snd_pcm_oss_release_substream; 2396 atomic_set(&runtime->oss.rw_ref, 0); 2397 } 2398 2399 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2400 { 2401 int cidx; 2402 if (!pcm_oss_file) 2403 return 0; 2404 for (cidx = 0; cidx < 2; ++cidx) { 2405 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2406 if (substream) 2407 snd_pcm_release_substream(substream); 2408 } 2409 kfree(pcm_oss_file); 2410 return 0; 2411 } 2412 2413 static int snd_pcm_oss_open_file(struct file *file, 2414 struct snd_pcm *pcm, 2415 struct snd_pcm_oss_file **rpcm_oss_file, 2416 int minor, 2417 struct snd_pcm_oss_setup *setup) 2418 { 2419 int idx, err; 2420 struct snd_pcm_oss_file *pcm_oss_file; 2421 struct snd_pcm_substream *substream; 2422 fmode_t f_mode = file->f_mode; 2423 2424 if (rpcm_oss_file) 2425 *rpcm_oss_file = NULL; 2426 2427 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2428 if (pcm_oss_file == NULL) 2429 return -ENOMEM; 2430 2431 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2432 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2433 f_mode = FMODE_WRITE; 2434 2435 file->f_flags &= ~O_APPEND; 2436 for (idx = 0; idx < 2; idx++) { 2437 if (setup[idx].disable) 2438 continue; 2439 if (! pcm->streams[idx].substream_count) 2440 continue; /* no matching substream */ 2441 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2442 if (! (f_mode & FMODE_WRITE)) 2443 continue; 2444 } else { 2445 if (! (f_mode & FMODE_READ)) 2446 continue; 2447 } 2448 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2449 if (err < 0) { 2450 snd_pcm_oss_release_file(pcm_oss_file); 2451 return err; 2452 } 2453 2454 pcm_oss_file->streams[idx] = substream; 2455 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2456 } 2457 2458 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2459 snd_pcm_oss_release_file(pcm_oss_file); 2460 return -EINVAL; 2461 } 2462 2463 file->private_data = pcm_oss_file; 2464 if (rpcm_oss_file) 2465 *rpcm_oss_file = pcm_oss_file; 2466 return 0; 2467 } 2468 2469 2470 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2471 { 2472 unsigned int idx; 2473 2474 if (snd_BUG_ON(!task || !name || size < 2)) 2475 return -EINVAL; 2476 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2477 name[idx] = task->comm[idx]; 2478 name[idx] = '\0'; 2479 return 0; 2480 } 2481 2482 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2483 { 2484 int err; 2485 char task_name[32]; 2486 struct snd_pcm *pcm; 2487 struct snd_pcm_oss_file *pcm_oss_file; 2488 struct snd_pcm_oss_setup setup[2]; 2489 int nonblock; 2490 wait_queue_entry_t wait; 2491 2492 err = nonseekable_open(inode, file); 2493 if (err < 0) 2494 return err; 2495 2496 pcm = snd_lookup_oss_minor_data(iminor(inode), 2497 SNDRV_OSS_DEVICE_TYPE_PCM); 2498 if (pcm == NULL) { 2499 err = -ENODEV; 2500 goto __error1; 2501 } 2502 err = snd_card_file_add(pcm->card, file); 2503 if (err < 0) 2504 goto __error1; 2505 if (!try_module_get(pcm->card->module)) { 2506 err = -EFAULT; 2507 goto __error2; 2508 } 2509 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2510 err = -EFAULT; 2511 goto __error; 2512 } 2513 memset(setup, 0, sizeof(setup)); 2514 if (file->f_mode & FMODE_WRITE) 2515 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2516 task_name, &setup[0]); 2517 if (file->f_mode & FMODE_READ) 2518 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2519 task_name, &setup[1]); 2520 2521 nonblock = !!(file->f_flags & O_NONBLOCK); 2522 if (!nonblock) 2523 nonblock = nonblock_open; 2524 2525 init_waitqueue_entry(&wait, current); 2526 add_wait_queue(&pcm->open_wait, &wait); 2527 mutex_lock(&pcm->open_mutex); 2528 while (1) { 2529 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2530 iminor(inode), setup); 2531 if (err >= 0) 2532 break; 2533 if (err == -EAGAIN) { 2534 if (nonblock) { 2535 err = -EBUSY; 2536 break; 2537 } 2538 } else 2539 break; 2540 set_current_state(TASK_INTERRUPTIBLE); 2541 mutex_unlock(&pcm->open_mutex); 2542 schedule(); 2543 mutex_lock(&pcm->open_mutex); 2544 if (pcm->card->shutdown) { 2545 err = -ENODEV; 2546 break; 2547 } 2548 if (signal_pending(current)) { 2549 err = -ERESTARTSYS; 2550 break; 2551 } 2552 } 2553 remove_wait_queue(&pcm->open_wait, &wait); 2554 mutex_unlock(&pcm->open_mutex); 2555 if (err < 0) 2556 goto __error; 2557 snd_card_unref(pcm->card); 2558 return err; 2559 2560 __error: 2561 module_put(pcm->card->module); 2562 __error2: 2563 snd_card_file_remove(pcm->card, file); 2564 __error1: 2565 if (pcm) 2566 snd_card_unref(pcm->card); 2567 return err; 2568 } 2569 2570 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2571 { 2572 struct snd_pcm *pcm; 2573 struct snd_pcm_substream *substream; 2574 struct snd_pcm_oss_file *pcm_oss_file; 2575 2576 pcm_oss_file = file->private_data; 2577 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2578 if (substream == NULL) 2579 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2580 if (snd_BUG_ON(!substream)) 2581 return -ENXIO; 2582 pcm = substream->pcm; 2583 if (!pcm->card->shutdown) 2584 snd_pcm_oss_sync(pcm_oss_file); 2585 mutex_lock(&pcm->open_mutex); 2586 snd_pcm_oss_release_file(pcm_oss_file); 2587 mutex_unlock(&pcm->open_mutex); 2588 wake_up(&pcm->open_wait); 2589 module_put(pcm->card->module); 2590 snd_card_file_remove(pcm->card, file); 2591 return 0; 2592 } 2593 2594 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2595 { 2596 struct snd_pcm_oss_file *pcm_oss_file; 2597 int __user *p = (int __user *)arg; 2598 int res; 2599 2600 pcm_oss_file = file->private_data; 2601 if (cmd == OSS_GETVERSION) 2602 return put_user(SNDRV_OSS_VERSION, p); 2603 if (cmd == OSS_ALSAEMULVER) 2604 return put_user(1, p); 2605 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2606 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2607 struct snd_pcm_substream *substream; 2608 int idx; 2609 for (idx = 0; idx < 2; ++idx) { 2610 substream = pcm_oss_file->streams[idx]; 2611 if (substream != NULL) 2612 break; 2613 } 2614 if (snd_BUG_ON(idx >= 2)) 2615 return -ENXIO; 2616 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2617 } 2618 #endif 2619 if (((cmd >> 8) & 0xff) != 'P') 2620 return -EINVAL; 2621 #ifdef OSS_DEBUG 2622 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2623 #endif 2624 switch (cmd) { 2625 case SNDCTL_DSP_RESET: 2626 return snd_pcm_oss_reset(pcm_oss_file); 2627 case SNDCTL_DSP_SYNC: 2628 return snd_pcm_oss_sync(pcm_oss_file); 2629 case SNDCTL_DSP_SPEED: 2630 if (get_user(res, p)) 2631 return -EFAULT; 2632 res = snd_pcm_oss_set_rate(pcm_oss_file, res); 2633 if (res < 0) 2634 return res; 2635 return put_user(res, p); 2636 case SOUND_PCM_READ_RATE: 2637 res = snd_pcm_oss_get_rate(pcm_oss_file); 2638 if (res < 0) 2639 return res; 2640 return put_user(res, p); 2641 case SNDCTL_DSP_STEREO: 2642 if (get_user(res, p)) 2643 return -EFAULT; 2644 res = res > 0 ? 2 : 1; 2645 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2646 if (res < 0) 2647 return res; 2648 return put_user(--res, p); 2649 case SNDCTL_DSP_GETBLKSIZE: 2650 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2651 if (res < 0) 2652 return res; 2653 return put_user(res, p); 2654 case SNDCTL_DSP_SETFMT: 2655 if (get_user(res, p)) 2656 return -EFAULT; 2657 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2658 if (res < 0) 2659 return res; 2660 return put_user(res, p); 2661 case SOUND_PCM_READ_BITS: 2662 res = snd_pcm_oss_get_format(pcm_oss_file); 2663 if (res < 0) 2664 return res; 2665 return put_user(res, p); 2666 case SNDCTL_DSP_CHANNELS: 2667 if (get_user(res, p)) 2668 return -EFAULT; 2669 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2670 if (res < 0) 2671 return res; 2672 return put_user(res, p); 2673 case SOUND_PCM_READ_CHANNELS: 2674 res = snd_pcm_oss_get_channels(pcm_oss_file); 2675 if (res < 0) 2676 return res; 2677 return put_user(res, p); 2678 case SOUND_PCM_WRITE_FILTER: 2679 case SOUND_PCM_READ_FILTER: 2680 return -EIO; 2681 case SNDCTL_DSP_POST: 2682 return snd_pcm_oss_post(pcm_oss_file); 2683 case SNDCTL_DSP_SUBDIVIDE: 2684 if (get_user(res, p)) 2685 return -EFAULT; 2686 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2687 if (res < 0) 2688 return res; 2689 return put_user(res, p); 2690 case SNDCTL_DSP_SETFRAGMENT: 2691 if (get_user(res, p)) 2692 return -EFAULT; 2693 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2694 case SNDCTL_DSP_GETFMTS: 2695 res = snd_pcm_oss_get_formats(pcm_oss_file); 2696 if (res < 0) 2697 return res; 2698 return put_user(res, p); 2699 case SNDCTL_DSP_GETOSPACE: 2700 case SNDCTL_DSP_GETISPACE: 2701 return snd_pcm_oss_get_space(pcm_oss_file, 2702 cmd == SNDCTL_DSP_GETISPACE ? 2703 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2704 (struct audio_buf_info __user *) arg); 2705 case SNDCTL_DSP_NONBLOCK: 2706 return snd_pcm_oss_nonblock(file); 2707 case SNDCTL_DSP_GETCAPS: 2708 res = snd_pcm_oss_get_caps(pcm_oss_file); 2709 if (res < 0) 2710 return res; 2711 return put_user(res, p); 2712 case SNDCTL_DSP_GETTRIGGER: 2713 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2714 if (res < 0) 2715 return res; 2716 return put_user(res, p); 2717 case SNDCTL_DSP_SETTRIGGER: 2718 if (get_user(res, p)) 2719 return -EFAULT; 2720 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2721 case SNDCTL_DSP_GETIPTR: 2722 case SNDCTL_DSP_GETOPTR: 2723 return snd_pcm_oss_get_ptr(pcm_oss_file, 2724 cmd == SNDCTL_DSP_GETIPTR ? 2725 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2726 (struct count_info __user *) arg); 2727 case SNDCTL_DSP_MAPINBUF: 2728 case SNDCTL_DSP_MAPOUTBUF: 2729 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2730 cmd == SNDCTL_DSP_MAPINBUF ? 2731 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2732 (struct buffmem_desc __user *) arg); 2733 case SNDCTL_DSP_SETSYNCRO: 2734 /* stop DMA now.. */ 2735 return 0; 2736 case SNDCTL_DSP_SETDUPLEX: 2737 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2738 return 0; 2739 return -EIO; 2740 case SNDCTL_DSP_GETODELAY: 2741 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2742 if (res < 0) { 2743 /* it's for sure, some broken apps don't check for error codes */ 2744 put_user(0, p); 2745 return res; 2746 } 2747 return put_user(res, p); 2748 case SNDCTL_DSP_PROFILE: 2749 return 0; /* silently ignore */ 2750 default: 2751 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2752 } 2753 return -EINVAL; 2754 } 2755 2756 #ifdef CONFIG_COMPAT 2757 /* all compatible */ 2758 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2759 unsigned long arg) 2760 { 2761 /* 2762 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF, 2763 * which are not implemented for the native case either 2764 */ 2765 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2766 } 2767 #else 2768 #define snd_pcm_oss_ioctl_compat NULL 2769 #endif 2770 2771 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2772 { 2773 struct snd_pcm_oss_file *pcm_oss_file; 2774 struct snd_pcm_substream *substream; 2775 2776 pcm_oss_file = file->private_data; 2777 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2778 if (substream == NULL) 2779 return -ENXIO; 2780 substream->f_flags = file->f_flags & O_NONBLOCK; 2781 #ifndef OSS_DEBUG 2782 return snd_pcm_oss_read1(substream, buf, count); 2783 #else 2784 { 2785 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2786 pcm_dbg(substream->pcm, 2787 "pcm_oss: read %li bytes (returned %li bytes)\n", 2788 (long)count, (long)res); 2789 return res; 2790 } 2791 #endif 2792 } 2793 2794 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2795 { 2796 struct snd_pcm_oss_file *pcm_oss_file; 2797 struct snd_pcm_substream *substream; 2798 long result; 2799 2800 pcm_oss_file = file->private_data; 2801 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2802 if (substream == NULL) 2803 return -ENXIO; 2804 substream->f_flags = file->f_flags & O_NONBLOCK; 2805 result = snd_pcm_oss_write1(substream, buf, count); 2806 #ifdef OSS_DEBUG 2807 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2808 (long)count, (long)result); 2809 #endif 2810 return result; 2811 } 2812 2813 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2814 { 2815 struct snd_pcm_runtime *runtime = substream->runtime; 2816 if (atomic_read(&substream->mmap_count)) 2817 return runtime->oss.prev_hw_ptr_period != 2818 get_hw_ptr_period(runtime); 2819 else 2820 return snd_pcm_playback_avail(runtime) >= 2821 runtime->oss.period_frames; 2822 } 2823 2824 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2825 { 2826 struct snd_pcm_runtime *runtime = substream->runtime; 2827 if (atomic_read(&substream->mmap_count)) 2828 return runtime->oss.prev_hw_ptr_period != 2829 get_hw_ptr_period(runtime); 2830 else 2831 return snd_pcm_capture_avail(runtime) >= 2832 runtime->oss.period_frames; 2833 } 2834 2835 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) 2836 { 2837 struct snd_pcm_oss_file *pcm_oss_file; 2838 __poll_t mask; 2839 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2840 2841 pcm_oss_file = file->private_data; 2842 2843 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2844 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2845 2846 mask = 0; 2847 if (psubstream != NULL) { 2848 struct snd_pcm_runtime *runtime = psubstream->runtime; 2849 poll_wait(file, &runtime->sleep, wait); 2850 snd_pcm_stream_lock_irq(psubstream); 2851 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2852 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2853 snd_pcm_oss_playback_ready(psubstream))) 2854 mask |= EPOLLOUT | EPOLLWRNORM; 2855 snd_pcm_stream_unlock_irq(psubstream); 2856 } 2857 if (csubstream != NULL) { 2858 struct snd_pcm_runtime *runtime = csubstream->runtime; 2859 snd_pcm_state_t ostate; 2860 poll_wait(file, &runtime->sleep, wait); 2861 snd_pcm_stream_lock_irq(csubstream); 2862 ostate = runtime->status->state; 2863 if (ostate != SNDRV_PCM_STATE_RUNNING || 2864 snd_pcm_oss_capture_ready(csubstream)) 2865 mask |= EPOLLIN | EPOLLRDNORM; 2866 snd_pcm_stream_unlock_irq(csubstream); 2867 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2868 struct snd_pcm_oss_file ofile; 2869 memset(&ofile, 0, sizeof(ofile)); 2870 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2871 runtime->oss.trigger = 0; 2872 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2873 } 2874 } 2875 2876 return mask; 2877 } 2878 2879 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2880 { 2881 struct snd_pcm_oss_file *pcm_oss_file; 2882 struct snd_pcm_substream *substream = NULL; 2883 struct snd_pcm_runtime *runtime; 2884 int err; 2885 2886 #ifdef OSS_DEBUG 2887 pr_debug("pcm_oss: mmap begin\n"); 2888 #endif 2889 pcm_oss_file = file->private_data; 2890 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2891 case VM_READ | VM_WRITE: 2892 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2893 if (substream) 2894 break; 2895 fallthrough; 2896 case VM_READ: 2897 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2898 break; 2899 case VM_WRITE: 2900 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2901 break; 2902 default: 2903 return -EINVAL; 2904 } 2905 /* set VM_READ access as well to fix memset() routines that do 2906 reads before writes (to improve performance) */ 2907 area->vm_flags |= VM_READ; 2908 if (substream == NULL) 2909 return -ENXIO; 2910 runtime = substream->runtime; 2911 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2912 return -EIO; 2913 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2914 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2915 else 2916 return -EIO; 2917 2918 if (runtime->oss.params) { 2919 /* use mutex_trylock() for params_lock for avoiding a deadlock 2920 * between mmap_lock and params_lock taken by 2921 * copy_from/to_user() in snd_pcm_oss_write/read() 2922 */ 2923 err = snd_pcm_oss_change_params(substream, true); 2924 if (err < 0) 2925 return err; 2926 } 2927 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2928 if (runtime->oss.plugin_first != NULL) 2929 return -EIO; 2930 #endif 2931 2932 if (area->vm_pgoff != 0) 2933 return -EINVAL; 2934 2935 err = snd_pcm_mmap_data(substream, file, area); 2936 if (err < 0) 2937 return err; 2938 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2939 runtime->silence_threshold = 0; 2940 runtime->silence_size = 0; 2941 #ifdef OSS_DEBUG 2942 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2943 runtime->oss.mmap_bytes); 2944 #endif 2945 /* In mmap mode we never stop */ 2946 runtime->stop_threshold = runtime->boundary; 2947 2948 return 0; 2949 } 2950 2951 #ifdef CONFIG_SND_VERBOSE_PROCFS 2952 /* 2953 * /proc interface 2954 */ 2955 2956 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2957 struct snd_info_buffer *buffer) 2958 { 2959 struct snd_pcm_str *pstr = entry->private_data; 2960 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2961 mutex_lock(&pstr->oss.setup_mutex); 2962 while (setup) { 2963 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2964 setup->task_name, 2965 setup->periods, 2966 setup->period_size, 2967 setup->disable ? " disable" : "", 2968 setup->direct ? " direct" : "", 2969 setup->block ? " block" : "", 2970 setup->nonblock ? " non-block" : "", 2971 setup->partialfrag ? " partial-frag" : "", 2972 setup->nosilence ? " no-silence" : ""); 2973 setup = setup->next; 2974 } 2975 mutex_unlock(&pstr->oss.setup_mutex); 2976 } 2977 2978 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2979 { 2980 struct snd_pcm_oss_setup *setup, *setupn; 2981 2982 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2983 setup; setup = setupn) { 2984 setupn = setup->next; 2985 kfree(setup->task_name); 2986 kfree(setup); 2987 } 2988 pstr->oss.setup_list = NULL; 2989 } 2990 2991 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2992 struct snd_info_buffer *buffer) 2993 { 2994 struct snd_pcm_str *pstr = entry->private_data; 2995 char line[128], str[32], task_name[32]; 2996 const char *ptr; 2997 int idx1; 2998 struct snd_pcm_oss_setup *setup, *setup1, template; 2999 3000 while (!snd_info_get_line(buffer, line, sizeof(line))) { 3001 mutex_lock(&pstr->oss.setup_mutex); 3002 memset(&template, 0, sizeof(template)); 3003 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 3004 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 3005 snd_pcm_oss_proc_free_setup_list(pstr); 3006 mutex_unlock(&pstr->oss.setup_mutex); 3007 continue; 3008 } 3009 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 3010 if (!strcmp(setup->task_name, task_name)) { 3011 template = *setup; 3012 break; 3013 } 3014 } 3015 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3016 template.periods = simple_strtoul(str, NULL, 10); 3017 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3018 template.period_size = simple_strtoul(str, NULL, 10); 3019 for (idx1 = 31; idx1 >= 0; idx1--) 3020 if (template.period_size & (1 << idx1)) 3021 break; 3022 for (idx1--; idx1 >= 0; idx1--) 3023 template.period_size &= ~(1 << idx1); 3024 do { 3025 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3026 if (!strcmp(str, "disable")) { 3027 template.disable = 1; 3028 } else if (!strcmp(str, "direct")) { 3029 template.direct = 1; 3030 } else if (!strcmp(str, "block")) { 3031 template.block = 1; 3032 } else if (!strcmp(str, "non-block")) { 3033 template.nonblock = 1; 3034 } else if (!strcmp(str, "partial-frag")) { 3035 template.partialfrag = 1; 3036 } else if (!strcmp(str, "no-silence")) { 3037 template.nosilence = 1; 3038 } else if (!strcmp(str, "buggy-ptr")) { 3039 template.buggyptr = 1; 3040 } 3041 } while (*str); 3042 if (setup == NULL) { 3043 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 3044 if (! setup) { 3045 buffer->error = -ENOMEM; 3046 mutex_unlock(&pstr->oss.setup_mutex); 3047 return; 3048 } 3049 if (pstr->oss.setup_list == NULL) 3050 pstr->oss.setup_list = setup; 3051 else { 3052 for (setup1 = pstr->oss.setup_list; 3053 setup1->next; setup1 = setup1->next); 3054 setup1->next = setup; 3055 } 3056 template.task_name = kstrdup(task_name, GFP_KERNEL); 3057 if (! template.task_name) { 3058 kfree(setup); 3059 buffer->error = -ENOMEM; 3060 mutex_unlock(&pstr->oss.setup_mutex); 3061 return; 3062 } 3063 } 3064 *setup = template; 3065 mutex_unlock(&pstr->oss.setup_mutex); 3066 } 3067 } 3068 3069 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3070 { 3071 int stream; 3072 for (stream = 0; stream < 2; ++stream) { 3073 struct snd_info_entry *entry; 3074 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3075 if (pstr->substream_count == 0) 3076 continue; 3077 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root); 3078 if (entry) { 3079 entry->content = SNDRV_INFO_CONTENT_TEXT; 3080 entry->mode = S_IFREG | 0644; 3081 entry->c.text.read = snd_pcm_oss_proc_read; 3082 entry->c.text.write = snd_pcm_oss_proc_write; 3083 entry->private_data = pstr; 3084 if (snd_info_register(entry) < 0) { 3085 snd_info_free_entry(entry); 3086 entry = NULL; 3087 } 3088 } 3089 pstr->oss.proc_entry = entry; 3090 } 3091 } 3092 3093 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3094 { 3095 int stream; 3096 for (stream = 0; stream < 2; ++stream) { 3097 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3098 snd_info_free_entry(pstr->oss.proc_entry); 3099 pstr->oss.proc_entry = NULL; 3100 snd_pcm_oss_proc_free_setup_list(pstr); 3101 } 3102 } 3103 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 3104 static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3105 { 3106 } 3107 static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3108 { 3109 } 3110 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 3111 3112 /* 3113 * ENTRY functions 3114 */ 3115 3116 static const struct file_operations snd_pcm_oss_f_reg = 3117 { 3118 .owner = THIS_MODULE, 3119 .read = snd_pcm_oss_read, 3120 .write = snd_pcm_oss_write, 3121 .open = snd_pcm_oss_open, 3122 .release = snd_pcm_oss_release, 3123 .llseek = no_llseek, 3124 .poll = snd_pcm_oss_poll, 3125 .unlocked_ioctl = snd_pcm_oss_ioctl, 3126 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3127 .mmap = snd_pcm_oss_mmap, 3128 }; 3129 3130 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3131 { 3132 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3133 pcm->card, index, &snd_pcm_oss_f_reg, 3134 pcm) < 0) { 3135 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3136 pcm->card->number, pcm->device); 3137 } 3138 } 3139 3140 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3141 { 3142 pcm->oss.reg = 0; 3143 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3144 char name[128]; 3145 int duplex; 3146 register_oss_dsp(pcm, 0); 3147 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3148 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3149 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3150 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3151 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3152 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3153 pcm->card->number, 3154 name); 3155 #endif 3156 pcm->oss.reg++; 3157 pcm->oss.reg_mask |= 1; 3158 } 3159 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3160 register_oss_dsp(pcm, 1); 3161 pcm->oss.reg++; 3162 pcm->oss.reg_mask |= 2; 3163 } 3164 3165 if (pcm->oss.reg) 3166 snd_pcm_oss_proc_init(pcm); 3167 3168 return 0; 3169 } 3170 3171 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3172 { 3173 if (pcm->oss.reg) { 3174 if (pcm->oss.reg_mask & 1) { 3175 pcm->oss.reg_mask &= ~1; 3176 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3177 pcm->card, 0); 3178 } 3179 if (pcm->oss.reg_mask & 2) { 3180 pcm->oss.reg_mask &= ~2; 3181 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3182 pcm->card, 1); 3183 } 3184 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3185 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3186 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3187 #endif 3188 } 3189 pcm->oss.reg = 0; 3190 } 3191 return 0; 3192 } 3193 3194 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3195 { 3196 snd_pcm_oss_disconnect_minor(pcm); 3197 snd_pcm_oss_proc_done(pcm); 3198 return 0; 3199 } 3200 3201 static struct snd_pcm_notify snd_pcm_oss_notify = 3202 { 3203 .n_register = snd_pcm_oss_register_minor, 3204 .n_disconnect = snd_pcm_oss_disconnect_minor, 3205 .n_unregister = snd_pcm_oss_unregister_minor, 3206 }; 3207 3208 static int __init alsa_pcm_oss_init(void) 3209 { 3210 int i; 3211 int err; 3212 3213 /* check device map table */ 3214 for (i = 0; i < SNDRV_CARDS; i++) { 3215 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3216 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3217 i, dsp_map[i]); 3218 dsp_map[i] = 0; 3219 } 3220 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3221 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3222 i, adsp_map[i]); 3223 adsp_map[i] = 1; 3224 } 3225 } 3226 err = snd_pcm_notify(&snd_pcm_oss_notify, 0); 3227 if (err < 0) 3228 return err; 3229 return 0; 3230 } 3231 3232 static void __exit alsa_pcm_oss_exit(void) 3233 { 3234 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3235 } 3236 3237 module_init(alsa_pcm_oss_init) 3238 module_exit(alsa_pcm_oss_exit) 3239