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