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