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