1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Digital Audio (PCM) abstract layer / OSS compatible 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 5 */ 6 7 #if 0 8 #define PLUGIN_DEBUG 9 #endif 10 #if 0 11 #define OSS_DEBUG 12 #endif 13 14 #include <linux/init.h> 15 #include <linux/slab.h> 16 #include <linux/sched/signal.h> 17 #include <linux/time.h> 18 #include <linux/vmalloc.h> 19 #include <linux/module.h> 20 #include <linux/math64.h> 21 #include <linux/string.h> 22 #include <linux/compat.h> 23 #include <sound/core.h> 24 #include <sound/minors.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include "pcm_plugin.h" 28 #include <sound/info.h> 29 #include <linux/soundcard.h> 30 #include <sound/initval.h> 31 #include <sound/mixer_oss.h> 32 33 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 34 35 static int dsp_map[SNDRV_CARDS]; 36 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 37 static bool nonblock_open = 1; 38 39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 40 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 41 MODULE_LICENSE("GPL"); 42 module_param_array(dsp_map, int, NULL, 0444); 43 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 44 module_param_array(adsp_map, int, NULL, 0444); 45 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 46 module_param(nonblock_open, bool, 0644); 47 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 48 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 49 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 50 51 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 52 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 53 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 54 55 /* 56 * helper functions to process hw_params 57 */ 58 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 59 { 60 int changed = 0; 61 if (i->min < min) { 62 i->min = min; 63 i->openmin = openmin; 64 changed = 1; 65 } else if (i->min == min && !i->openmin && openmin) { 66 i->openmin = 1; 67 changed = 1; 68 } 69 if (i->integer) { 70 if (i->openmin) { 71 i->min++; 72 i->openmin = 0; 73 } 74 } 75 if (snd_interval_checkempty(i)) { 76 snd_interval_none(i); 77 return -EINVAL; 78 } 79 return changed; 80 } 81 82 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 83 { 84 int changed = 0; 85 if (i->max > max) { 86 i->max = max; 87 i->openmax = openmax; 88 changed = 1; 89 } else if (i->max == max && !i->openmax && openmax) { 90 i->openmax = 1; 91 changed = 1; 92 } 93 if (i->integer) { 94 if (i->openmax) { 95 i->max--; 96 i->openmax = 0; 97 } 98 } 99 if (snd_interval_checkempty(i)) { 100 snd_interval_none(i); 101 return -EINVAL; 102 } 103 return changed; 104 } 105 106 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 107 { 108 struct snd_interval t; 109 t.empty = 0; 110 t.min = t.max = val; 111 t.openmin = t.openmax = 0; 112 t.integer = 1; 113 return snd_interval_refine(i, &t); 114 } 115 116 /** 117 * snd_pcm_hw_param_value_min 118 * @params: the hw_params instance 119 * @var: parameter to retrieve 120 * @dir: pointer to the direction (-1,0,1) or NULL 121 * 122 * Return the minimum value for field PAR. 123 */ 124 static unsigned int 125 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 126 snd_pcm_hw_param_t var, int *dir) 127 { 128 if (hw_is_mask(var)) { 129 if (dir) 130 *dir = 0; 131 return snd_mask_min(hw_param_mask_c(params, var)); 132 } 133 if (hw_is_interval(var)) { 134 const struct snd_interval *i = hw_param_interval_c(params, var); 135 if (dir) 136 *dir = i->openmin; 137 return snd_interval_min(i); 138 } 139 return -EINVAL; 140 } 141 142 /** 143 * snd_pcm_hw_param_value_max 144 * @params: the hw_params instance 145 * @var: parameter to retrieve 146 * @dir: pointer to the direction (-1,0,1) or NULL 147 * 148 * Return the maximum value for field PAR. 149 */ 150 static int 151 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 152 snd_pcm_hw_param_t var, int *dir) 153 { 154 if (hw_is_mask(var)) { 155 if (dir) 156 *dir = 0; 157 return snd_mask_max(hw_param_mask_c(params, var)); 158 } 159 if (hw_is_interval(var)) { 160 const struct snd_interval *i = hw_param_interval_c(params, var); 161 if (dir) 162 *dir = - (int) i->openmax; 163 return snd_interval_max(i); 164 } 165 return -EINVAL; 166 } 167 168 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 169 snd_pcm_hw_param_t var, 170 const struct snd_mask *val) 171 { 172 int changed; 173 changed = snd_mask_refine(hw_param_mask(params, var), val); 174 if (changed > 0) { 175 params->cmask |= 1 << var; 176 params->rmask |= 1 << var; 177 } 178 return changed; 179 } 180 181 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 182 struct snd_pcm_hw_params *params, 183 snd_pcm_hw_param_t var, 184 const struct snd_mask *val) 185 { 186 int changed = _snd_pcm_hw_param_mask(params, var, val); 187 if (changed < 0) 188 return changed; 189 if (params->rmask) { 190 int err = snd_pcm_hw_refine(pcm, params); 191 if (err < 0) 192 return err; 193 } 194 return 0; 195 } 196 197 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 198 snd_pcm_hw_param_t var, unsigned int val, 199 int dir) 200 { 201 int changed; 202 int open = 0; 203 if (dir) { 204 if (dir > 0) { 205 open = 1; 206 } else if (dir < 0) { 207 if (val > 0) { 208 open = 1; 209 val--; 210 } 211 } 212 } 213 if (hw_is_mask(var)) 214 changed = snd_mask_refine_min(hw_param_mask(params, var), 215 val + !!open); 216 else if (hw_is_interval(var)) 217 changed = snd_interval_refine_min(hw_param_interval(params, var), 218 val, open); 219 else 220 return -EINVAL; 221 if (changed > 0) { 222 params->cmask |= 1 << var; 223 params->rmask |= 1 << var; 224 } 225 return changed; 226 } 227 228 /** 229 * snd_pcm_hw_param_min 230 * @pcm: PCM instance 231 * @params: the hw_params instance 232 * @var: parameter to retrieve 233 * @val: minimal value 234 * @dir: pointer to the direction (-1,0,1) or NULL 235 * 236 * Inside configuration space defined by PARAMS remove from PAR all 237 * values < VAL. Reduce configuration space accordingly. 238 * Return new minimum or -EINVAL if the configuration space is empty 239 */ 240 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 241 struct snd_pcm_hw_params *params, 242 snd_pcm_hw_param_t var, unsigned int val, 243 int *dir) 244 { 245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 246 if (changed < 0) 247 return changed; 248 if (params->rmask) { 249 int err = snd_pcm_hw_refine(pcm, params); 250 if (err < 0) 251 return err; 252 } 253 return snd_pcm_hw_param_value_min(params, var, dir); 254 } 255 256 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 257 snd_pcm_hw_param_t var, unsigned int val, 258 int dir) 259 { 260 int changed; 261 int open = 0; 262 if (dir) { 263 if (dir < 0) { 264 open = 1; 265 } else if (dir > 0) { 266 open = 1; 267 val++; 268 } 269 } 270 if (hw_is_mask(var)) { 271 if (val == 0 && open) { 272 snd_mask_none(hw_param_mask(params, var)); 273 changed = -EINVAL; 274 } else 275 changed = snd_mask_refine_max(hw_param_mask(params, var), 276 val - !!open); 277 } else if (hw_is_interval(var)) 278 changed = snd_interval_refine_max(hw_param_interval(params, var), 279 val, open); 280 else 281 return -EINVAL; 282 if (changed > 0) { 283 params->cmask |= 1 << var; 284 params->rmask |= 1 << var; 285 } 286 return changed; 287 } 288 289 /** 290 * snd_pcm_hw_param_max 291 * @pcm: PCM instance 292 * @params: the hw_params instance 293 * @var: parameter to retrieve 294 * @val: maximal value 295 * @dir: pointer to the direction (-1,0,1) or NULL 296 * 297 * Inside configuration space defined by PARAMS remove from PAR all 298 * values >= VAL + 1. Reduce configuration space accordingly. 299 * Return new maximum or -EINVAL if the configuration space is empty 300 */ 301 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 302 struct snd_pcm_hw_params *params, 303 snd_pcm_hw_param_t var, unsigned int val, 304 int *dir) 305 { 306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 307 if (changed < 0) 308 return changed; 309 if (params->rmask) { 310 int err = snd_pcm_hw_refine(pcm, params); 311 if (err < 0) 312 return err; 313 } 314 return snd_pcm_hw_param_value_max(params, var, dir); 315 } 316 317 static int boundary_sub(int a, int adir, 318 int b, int bdir, 319 int *c, int *cdir) 320 { 321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 323 *c = a - b; 324 *cdir = adir - bdir; 325 if (*cdir == -2) { 326 (*c)--; 327 } else if (*cdir == 2) { 328 (*c)++; 329 } 330 return 0; 331 } 332 333 static int boundary_lt(unsigned int a, int adir, 334 unsigned int b, int bdir) 335 { 336 if (adir < 0) { 337 a--; 338 adir = 1; 339 } else if (adir > 0) 340 adir = 1; 341 if (bdir < 0) { 342 b--; 343 bdir = 1; 344 } else if (bdir > 0) 345 bdir = 1; 346 return a < b || (a == b && adir < bdir); 347 } 348 349 /* Return 1 if min is nearer to best than max */ 350 static int boundary_nearer(int min, int mindir, 351 int best, int bestdir, 352 int max, int maxdir) 353 { 354 int dmin, dmindir; 355 int dmax, dmaxdir; 356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 358 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 359 } 360 361 /** 362 * snd_pcm_hw_param_near 363 * @pcm: PCM instance 364 * @params: the hw_params instance 365 * @var: parameter to retrieve 366 * @best: value to set 367 * @dir: pointer to the direction (-1,0,1) or NULL 368 * 369 * Inside configuration space defined by PARAMS set PAR to the available value 370 * nearest to VAL. Reduce configuration space accordingly. 371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 373 * Return the value found. 374 */ 375 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 376 struct snd_pcm_hw_params *params, 377 snd_pcm_hw_param_t var, unsigned int best, 378 int *dir) 379 { 380 struct snd_pcm_hw_params *save = NULL; 381 int v; 382 unsigned int saved_min; 383 int last = 0; 384 int min, max; 385 int mindir, maxdir; 386 int valdir = dir ? *dir : 0; 387 /* FIXME */ 388 if (best > INT_MAX) 389 best = INT_MAX; 390 min = max = best; 391 mindir = maxdir = valdir; 392 if (maxdir > 0) 393 maxdir = 0; 394 else if (maxdir == 0) 395 maxdir = -1; 396 else { 397 maxdir = 1; 398 max--; 399 } 400 save = kmalloc(sizeof(*save), GFP_KERNEL); 401 if (save == NULL) 402 return -ENOMEM; 403 *save = *params; 404 saved_min = min; 405 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 406 if (min >= 0) { 407 struct snd_pcm_hw_params *params1; 408 if (max < 0) 409 goto _end; 410 if ((unsigned int)min == saved_min && mindir == valdir) 411 goto _end; 412 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 413 if (params1 == NULL) { 414 kfree(save); 415 return -ENOMEM; 416 } 417 *params1 = *save; 418 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 419 if (max < 0) { 420 kfree(params1); 421 goto _end; 422 } 423 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 424 *params = *params1; 425 last = 1; 426 } 427 kfree(params1); 428 } else { 429 *params = *save; 430 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 431 if (max < 0) { 432 kfree(save); 433 return max; 434 } 435 last = 1; 436 } 437 _end: 438 kfree(save); 439 if (last) 440 v = snd_pcm_hw_param_last(pcm, params, var, dir); 441 else 442 v = snd_pcm_hw_param_first(pcm, params, var, dir); 443 return v; 444 } 445 446 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 447 snd_pcm_hw_param_t var, unsigned int val, 448 int dir) 449 { 450 int changed; 451 if (hw_is_mask(var)) { 452 struct snd_mask *m = hw_param_mask(params, var); 453 if (val == 0 && dir < 0) { 454 changed = -EINVAL; 455 snd_mask_none(m); 456 } else { 457 if (dir > 0) 458 val++; 459 else if (dir < 0) 460 val--; 461 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 462 } 463 } else if (hw_is_interval(var)) { 464 struct snd_interval *i = hw_param_interval(params, var); 465 if (val == 0 && dir < 0) { 466 changed = -EINVAL; 467 snd_interval_none(i); 468 } else if (dir == 0) 469 changed = snd_interval_refine_set(i, val); 470 else { 471 struct snd_interval t; 472 t.openmin = 1; 473 t.openmax = 1; 474 t.empty = 0; 475 t.integer = 0; 476 if (dir < 0) { 477 t.min = val - 1; 478 t.max = val; 479 } else { 480 t.min = val; 481 t.max = val+1; 482 } 483 changed = snd_interval_refine(i, &t); 484 } 485 } else 486 return -EINVAL; 487 if (changed > 0) { 488 params->cmask |= 1 << var; 489 params->rmask |= 1 << var; 490 } 491 return changed; 492 } 493 494 /** 495 * snd_pcm_hw_param_set 496 * @pcm: PCM instance 497 * @params: the hw_params instance 498 * @var: parameter to retrieve 499 * @val: value to set 500 * @dir: pointer to the direction (-1,0,1) or NULL 501 * 502 * Inside configuration space defined by PARAMS remove from PAR all 503 * values != VAL. Reduce configuration space accordingly. 504 * Return VAL or -EINVAL if the configuration space is empty 505 */ 506 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 507 struct snd_pcm_hw_params *params, 508 snd_pcm_hw_param_t var, unsigned int val, 509 int dir) 510 { 511 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 512 if (changed < 0) 513 return changed; 514 if (params->rmask) { 515 int err = snd_pcm_hw_refine(pcm, params); 516 if (err < 0) 517 return err; 518 } 519 return snd_pcm_hw_param_value(params, var, NULL); 520 } 521 522 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 523 snd_pcm_hw_param_t var) 524 { 525 int changed; 526 changed = snd_interval_setinteger(hw_param_interval(params, var)); 527 if (changed > 0) { 528 params->cmask |= 1 << var; 529 params->rmask |= 1 << var; 530 } 531 return changed; 532 } 533 534 /* 535 * plugin 536 */ 537 538 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 539 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 540 { 541 struct snd_pcm_runtime *runtime = substream->runtime; 542 struct snd_pcm_plugin *plugin, *next; 543 544 plugin = runtime->oss.plugin_first; 545 while (plugin) { 546 next = plugin->next; 547 snd_pcm_plugin_free(plugin); 548 plugin = next; 549 } 550 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 551 return 0; 552 } 553 554 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 555 { 556 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 557 plugin->next = runtime->oss.plugin_first; 558 plugin->prev = NULL; 559 if (runtime->oss.plugin_first) { 560 runtime->oss.plugin_first->prev = plugin; 561 runtime->oss.plugin_first = plugin; 562 } else { 563 runtime->oss.plugin_last = 564 runtime->oss.plugin_first = plugin; 565 } 566 return 0; 567 } 568 569 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 570 { 571 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 572 plugin->next = NULL; 573 plugin->prev = runtime->oss.plugin_last; 574 if (runtime->oss.plugin_last) { 575 runtime->oss.plugin_last->next = plugin; 576 runtime->oss.plugin_last = plugin; 577 } else { 578 runtime->oss.plugin_last = 579 runtime->oss.plugin_first = plugin; 580 } 581 return 0; 582 } 583 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 584 585 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 586 { 587 struct snd_pcm_runtime *runtime = substream->runtime; 588 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 589 long bytes = frames_to_bytes(runtime, frames); 590 if (buffer_size == runtime->oss.buffer_bytes) 591 return bytes; 592 #if BITS_PER_LONG >= 64 593 return runtime->oss.buffer_bytes * bytes / buffer_size; 594 #else 595 { 596 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 597 return div_u64(bsize, buffer_size); 598 } 599 #endif 600 } 601 602 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 603 { 604 struct snd_pcm_runtime *runtime = substream->runtime; 605 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 606 if (buffer_size == runtime->oss.buffer_bytes) 607 return bytes_to_frames(runtime, bytes); 608 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 609 } 610 611 static inline 612 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 613 { 614 return runtime->hw_ptr_interrupt; 615 } 616 617 /* define extended formats in the recent OSS versions (if any) */ 618 /* linear formats */ 619 #define AFMT_S32_LE 0x00001000 620 #define AFMT_S32_BE 0x00002000 621 #define AFMT_S24_LE 0x00008000 622 #define AFMT_S24_BE 0x00010000 623 #define AFMT_S24_PACKED 0x00040000 624 625 /* other supported formats */ 626 #define AFMT_FLOAT 0x00004000 627 #define AFMT_SPDIF_RAW 0x00020000 628 629 /* unsupported formats */ 630 #define AFMT_AC3 0x00000400 631 #define AFMT_VORBIS 0x00000800 632 633 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 634 { 635 switch (format) { 636 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 637 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 638 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 639 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 640 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 641 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 642 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 643 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 644 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 645 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 646 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 647 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 648 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 649 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 650 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 651 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 652 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 653 default: return SNDRV_PCM_FORMAT_U8; 654 } 655 } 656 657 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 658 { 659 switch (format) { 660 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 661 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 662 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 663 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 664 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 665 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 666 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 667 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 668 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 669 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 670 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 671 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 672 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 673 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 674 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 675 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 676 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 677 default: return -EINVAL; 678 } 679 } 680 681 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 682 struct snd_pcm_hw_params *oss_params, 683 struct snd_pcm_hw_params *slave_params) 684 { 685 ssize_t s; 686 ssize_t oss_buffer_size; 687 ssize_t oss_period_size, oss_periods; 688 ssize_t min_period_size, max_period_size; 689 struct snd_pcm_runtime *runtime = substream->runtime; 690 size_t oss_frame_size; 691 692 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 693 params_channels(oss_params) / 8; 694 695 oss_buffer_size = snd_pcm_hw_param_value_max(slave_params, 696 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 697 NULL); 698 if (oss_buffer_size <= 0) 699 return -EINVAL; 700 oss_buffer_size = snd_pcm_plug_client_size(substream, 701 oss_buffer_size * oss_frame_size); 702 if (oss_buffer_size <= 0) 703 return -EINVAL; 704 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 705 if (atomic_read(&substream->mmap_count)) { 706 if (oss_buffer_size > runtime->oss.mmap_bytes) 707 oss_buffer_size = runtime->oss.mmap_bytes; 708 } 709 710 if (substream->oss.setup.period_size > 16) 711 oss_period_size = substream->oss.setup.period_size; 712 else if (runtime->oss.fragshift) { 713 oss_period_size = 1 << runtime->oss.fragshift; 714 if (oss_period_size > oss_buffer_size / 2) 715 oss_period_size = oss_buffer_size / 2; 716 } else { 717 int sd; 718 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 719 720 oss_period_size = oss_buffer_size; 721 do { 722 oss_period_size /= 2; 723 } while (oss_period_size > bytes_per_sec); 724 if (runtime->oss.subdivision == 0) { 725 sd = 4; 726 if (oss_period_size / sd > 4096) 727 sd *= 2; 728 if (oss_period_size / sd < 4096) 729 sd = 1; 730 } else 731 sd = runtime->oss.subdivision; 732 oss_period_size /= sd; 733 if (oss_period_size < 16) 734 oss_period_size = 16; 735 } 736 737 min_period_size = snd_pcm_plug_client_size(substream, 738 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 739 if (min_period_size > 0) { 740 min_period_size *= oss_frame_size; 741 min_period_size = roundup_pow_of_two(min_period_size); 742 if (oss_period_size < min_period_size) 743 oss_period_size = min_period_size; 744 } 745 746 max_period_size = snd_pcm_plug_client_size(substream, 747 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 748 if (max_period_size > 0) { 749 max_period_size *= oss_frame_size; 750 max_period_size = rounddown_pow_of_two(max_period_size); 751 if (oss_period_size > max_period_size) 752 oss_period_size = max_period_size; 753 } 754 755 oss_periods = oss_buffer_size / oss_period_size; 756 757 if (substream->oss.setup.periods > 1) 758 oss_periods = substream->oss.setup.periods; 759 760 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 761 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags) 762 s = runtime->oss.maxfrags; 763 if (oss_periods > s) 764 oss_periods = s; 765 766 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 767 if (s < 2) 768 s = 2; 769 if (oss_periods < s) 770 oss_periods = s; 771 772 while (oss_period_size * oss_periods > oss_buffer_size) 773 oss_period_size /= 2; 774 775 if (oss_period_size < 16) 776 return -EINVAL; 777 778 /* don't allocate too large period; 1MB period must be enough */ 779 if (oss_period_size > 1024 * 1024) 780 return -ENOMEM; 781 782 runtime->oss.period_bytes = oss_period_size; 783 runtime->oss.period_frames = 1; 784 runtime->oss.periods = oss_periods; 785 return 0; 786 } 787 788 static int choose_rate(struct snd_pcm_substream *substream, 789 struct snd_pcm_hw_params *params, unsigned int best_rate) 790 { 791 const struct snd_interval *it; 792 struct snd_pcm_hw_params *save; 793 unsigned int rate, prev; 794 795 save = kmalloc(sizeof(*save), GFP_KERNEL); 796 if (save == NULL) 797 return -ENOMEM; 798 *save = *params; 799 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); 800 801 /* try multiples of the best rate */ 802 rate = best_rate; 803 for (;;) { 804 if (it->max < rate || (it->max == rate && it->openmax)) 805 break; 806 if (it->min < rate || (it->min == rate && !it->openmin)) { 807 int ret; 808 ret = snd_pcm_hw_param_set(substream, params, 809 SNDRV_PCM_HW_PARAM_RATE, 810 rate, 0); 811 if (ret == (int)rate) { 812 kfree(save); 813 return rate; 814 } 815 *params = *save; 816 } 817 prev = rate; 818 rate += best_rate; 819 if (rate <= prev) 820 break; 821 } 822 823 /* not found, use the nearest rate */ 824 kfree(save); 825 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 826 } 827 828 /* parameter locking: returns immediately if tried during streaming */ 829 static int lock_params(struct snd_pcm_runtime *runtime) 830 { 831 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 832 return -ERESTARTSYS; 833 if (atomic_read(&runtime->oss.rw_ref)) { 834 mutex_unlock(&runtime->oss.params_lock); 835 return -EBUSY; 836 } 837 return 0; 838 } 839 840 static void unlock_params(struct snd_pcm_runtime *runtime) 841 { 842 mutex_unlock(&runtime->oss.params_lock); 843 } 844 845 static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream) 846 { 847 struct snd_pcm_runtime *runtime = substream->runtime; 848 849 kvfree(runtime->oss.buffer); 850 runtime->oss.buffer = NULL; 851 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 852 snd_pcm_oss_plugin_clear(substream); 853 #endif 854 } 855 856 /* call with params_lock held */ 857 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) 858 { 859 struct snd_pcm_runtime *runtime = substream->runtime; 860 struct snd_pcm_hw_params *params, *sparams; 861 struct snd_pcm_sw_params *sw_params; 862 ssize_t oss_buffer_size, oss_period_size; 863 size_t oss_frame_size; 864 int err; 865 int direct; 866 snd_pcm_format_t format, sformat; 867 int n; 868 const struct snd_mask *sformat_mask; 869 struct snd_mask mask; 870 871 if (!runtime->oss.params) 872 return 0; 873 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 874 params = kmalloc(sizeof(*params), GFP_KERNEL); 875 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 876 if (!sw_params || !params || !sparams) { 877 err = -ENOMEM; 878 goto failure; 879 } 880 881 if (atomic_read(&substream->mmap_count)) 882 direct = 1; 883 else 884 direct = substream->oss.setup.direct; 885 886 _snd_pcm_hw_params_any(sparams); 887 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 888 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 889 snd_mask_none(&mask); 890 if (atomic_read(&substream->mmap_count)) 891 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 892 else { 893 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 894 if (!direct) 895 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 896 } 897 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 898 if (err < 0) { 899 pcm_dbg(substream->pcm, "No usable accesses\n"); 900 err = -EINVAL; 901 goto failure; 902 } 903 904 err = choose_rate(substream, sparams, runtime->oss.rate); 905 if (err < 0) 906 goto failure; 907 err = snd_pcm_hw_param_near(substream, sparams, 908 SNDRV_PCM_HW_PARAM_CHANNELS, 909 runtime->oss.channels, NULL); 910 if (err < 0) 911 goto failure; 912 913 format = snd_pcm_oss_format_from(runtime->oss.format); 914 915 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 916 if (direct) 917 sformat = format; 918 else 919 sformat = snd_pcm_plug_slave_format(format, sformat_mask); 920 921 if ((__force int)sformat < 0 || 922 !snd_mask_test_format(sformat_mask, sformat)) { 923 pcm_for_each_format(sformat) { 924 if (snd_mask_test_format(sformat_mask, sformat) && 925 snd_pcm_oss_format_to(sformat) >= 0) 926 goto format_found; 927 } 928 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 929 err = -EINVAL; 930 goto failure; 931 } 932 format_found: 933 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 934 if (err < 0) 935 goto failure; 936 937 if (direct) { 938 memcpy(params, sparams, sizeof(*params)); 939 } else { 940 _snd_pcm_hw_params_any(params); 941 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 942 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 943 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 944 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 945 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 946 runtime->oss.channels, 0); 947 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 948 runtime->oss.rate, 0); 949 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 950 params_access(params), params_format(params), 951 params_channels(params), params_rate(params)); 952 } 953 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 954 params_access(sparams), params_format(sparams), 955 params_channels(sparams), params_rate(sparams)); 956 957 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 958 params_channels(params) / 8; 959 960 err = snd_pcm_oss_period_size(substream, params, sparams); 961 if (err < 0) 962 goto failure; 963 964 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 965 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 966 if (err < 0) 967 goto failure; 968 969 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 970 runtime->oss.periods, NULL); 971 if (err < 0) 972 goto failure; 973 974 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 975 976 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams); 977 if (err < 0) { 978 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 979 goto failure; 980 } 981 982 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 983 snd_pcm_oss_plugin_clear(substream); 984 if (!direct) { 985 /* add necessary plugins */ 986 err = snd_pcm_plug_format_plugins(substream, params, sparams); 987 if (err < 0) { 988 pcm_dbg(substream->pcm, 989 "snd_pcm_plug_format_plugins failed: %i\n", err); 990 goto failure; 991 } 992 if (runtime->oss.plugin_first) { 993 struct snd_pcm_plugin *plugin; 994 err = snd_pcm_plugin_build_io(substream, sparams, &plugin); 995 if (err < 0) { 996 pcm_dbg(substream->pcm, 997 "snd_pcm_plugin_build_io failed: %i\n", err); 998 goto failure; 999 } 1000 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1001 err = snd_pcm_plugin_append(plugin); 1002 } else { 1003 err = snd_pcm_plugin_insert(plugin); 1004 } 1005 if (err < 0) 1006 goto failure; 1007 } 1008 } 1009 #endif 1010 1011 if (runtime->oss.trigger) { 1012 sw_params->start_threshold = 1; 1013 } else { 1014 sw_params->start_threshold = runtime->boundary; 1015 } 1016 if (atomic_read(&substream->mmap_count) || 1017 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1018 sw_params->stop_threshold = runtime->boundary; 1019 else 1020 sw_params->stop_threshold = runtime->buffer_size; 1021 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1022 sw_params->period_step = 1; 1023 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1024 1 : runtime->period_size; 1025 if (atomic_read(&substream->mmap_count) || 1026 substream->oss.setup.nosilence) { 1027 sw_params->silence_threshold = 0; 1028 sw_params->silence_size = 0; 1029 } else { 1030 snd_pcm_uframes_t frames; 1031 frames = runtime->period_size + 16; 1032 if (frames > runtime->buffer_size) 1033 frames = runtime->buffer_size; 1034 sw_params->silence_threshold = frames; 1035 sw_params->silence_size = frames; 1036 } 1037 1038 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params); 1039 if (err < 0) { 1040 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1041 goto failure; 1042 } 1043 1044 runtime->oss.periods = params_periods(sparams); 1045 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1046 if (oss_period_size < 0) { 1047 err = -EINVAL; 1048 goto failure; 1049 } 1050 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1051 if (runtime->oss.plugin_first) { 1052 err = snd_pcm_plug_alloc(substream, oss_period_size); 1053 if (err < 0) 1054 goto failure; 1055 } 1056 #endif 1057 oss_period_size = array_size(oss_period_size, oss_frame_size); 1058 oss_buffer_size = array_size(oss_period_size, runtime->oss.periods); 1059 if (oss_buffer_size <= 0) { 1060 err = -EINVAL; 1061 goto failure; 1062 } 1063 1064 runtime->oss.period_bytes = oss_period_size; 1065 runtime->oss.buffer_bytes = oss_buffer_size; 1066 1067 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1068 runtime->oss.period_bytes, 1069 runtime->oss.buffer_bytes); 1070 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1071 params_period_size(sparams), 1072 params_buffer_size(sparams)); 1073 1074 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1075 runtime->oss.channels = params_channels(params); 1076 runtime->oss.rate = params_rate(params); 1077 1078 kvfree(runtime->oss.buffer); 1079 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL); 1080 if (!runtime->oss.buffer) { 1081 err = -ENOMEM; 1082 goto failure; 1083 } 1084 1085 runtime->oss.params = 0; 1086 runtime->oss.prepare = 1; 1087 runtime->oss.buffer_used = 0; 1088 if (runtime->dma_area) 1089 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1090 1091 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1092 1093 err = 0; 1094 failure: 1095 if (err) 1096 snd_pcm_oss_release_buffers(substream); 1097 kfree(sw_params); 1098 kfree(params); 1099 kfree(sparams); 1100 return err; 1101 } 1102 1103 /* this one takes the lock by itself */ 1104 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 1105 bool trylock) 1106 { 1107 struct snd_pcm_runtime *runtime = substream->runtime; 1108 int err; 1109 1110 if (trylock) { 1111 if (!(mutex_trylock(&runtime->oss.params_lock))) 1112 return -EAGAIN; 1113 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1114 return -ERESTARTSYS; 1115 1116 err = snd_pcm_oss_change_params_locked(substream); 1117 mutex_unlock(&runtime->oss.params_lock); 1118 return err; 1119 } 1120 1121 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1122 { 1123 int idx, err; 1124 struct snd_pcm_substream *asubstream = NULL, *substream; 1125 1126 for (idx = 0; idx < 2; idx++) { 1127 substream = pcm_oss_file->streams[idx]; 1128 if (substream == NULL) 1129 continue; 1130 if (asubstream == NULL) 1131 asubstream = substream; 1132 if (substream->runtime->oss.params) { 1133 err = snd_pcm_oss_change_params(substream, false); 1134 if (err < 0) 1135 return err; 1136 } 1137 } 1138 if (!asubstream) 1139 return -EIO; 1140 if (r_substream) 1141 *r_substream = asubstream; 1142 return 0; 1143 } 1144 1145 /* call with params_lock held */ 1146 /* NOTE: this always call PREPARE unconditionally no matter whether 1147 * runtime->oss.prepare is set or not 1148 */ 1149 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1150 { 1151 int err; 1152 struct snd_pcm_runtime *runtime = substream->runtime; 1153 1154 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1155 if (err < 0) { 1156 pcm_dbg(substream->pcm, 1157 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1158 return err; 1159 } 1160 runtime->oss.prepare = 0; 1161 runtime->oss.prev_hw_ptr_period = 0; 1162 runtime->oss.period_ptr = 0; 1163 runtime->oss.buffer_used = 0; 1164 1165 return 0; 1166 } 1167 1168 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1169 { 1170 struct snd_pcm_runtime *runtime; 1171 int err; 1172 1173 runtime = substream->runtime; 1174 if (runtime->oss.params) { 1175 err = snd_pcm_oss_change_params(substream, false); 1176 if (err < 0) 1177 return err; 1178 } 1179 if (runtime->oss.prepare) { 1180 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1181 return -ERESTARTSYS; 1182 err = snd_pcm_oss_prepare(substream); 1183 mutex_unlock(&runtime->oss.params_lock); 1184 if (err < 0) 1185 return err; 1186 } 1187 return 0; 1188 } 1189 1190 /* call with params_lock held */ 1191 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) 1192 { 1193 struct snd_pcm_runtime *runtime; 1194 int err; 1195 1196 runtime = substream->runtime; 1197 if (runtime->oss.params) { 1198 err = snd_pcm_oss_change_params_locked(substream); 1199 if (err < 0) 1200 return err; 1201 } 1202 if (runtime->oss.prepare) { 1203 err = snd_pcm_oss_prepare(substream); 1204 if (err < 0) 1205 return err; 1206 } 1207 return 0; 1208 } 1209 1210 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1211 { 1212 struct snd_pcm_runtime *runtime; 1213 snd_pcm_uframes_t frames; 1214 int err = 0; 1215 1216 while (1) { 1217 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1218 if (err < 0) 1219 break; 1220 runtime = substream->runtime; 1221 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1222 break; 1223 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1224 /* until avail(delay) <= buffer_size */ 1225 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1226 frames /= runtime->period_size; 1227 frames *= runtime->period_size; 1228 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1229 if (err < 0) 1230 break; 1231 } 1232 return err; 1233 } 1234 1235 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1236 { 1237 struct snd_pcm_runtime *runtime = substream->runtime; 1238 int ret; 1239 while (1) { 1240 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1241 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1242 #ifdef OSS_DEBUG 1243 pcm_dbg(substream->pcm, 1244 "pcm_oss: write: recovering from %s\n", 1245 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1246 "XRUN" : "SUSPEND"); 1247 #endif 1248 ret = snd_pcm_oss_prepare(substream); 1249 if (ret < 0) 1250 break; 1251 } 1252 mutex_unlock(&runtime->oss.params_lock); 1253 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1254 frames, in_kernel); 1255 mutex_lock(&runtime->oss.params_lock); 1256 if (ret != -EPIPE && ret != -ESTRPIPE) 1257 break; 1258 /* test, if we can't store new data, because the stream */ 1259 /* has not been started */ 1260 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1261 return -EAGAIN; 1262 } 1263 return ret; 1264 } 1265 1266 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1267 { 1268 struct snd_pcm_runtime *runtime = substream->runtime; 1269 snd_pcm_sframes_t delay; 1270 int ret; 1271 while (1) { 1272 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1273 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1274 #ifdef OSS_DEBUG 1275 pcm_dbg(substream->pcm, 1276 "pcm_oss: read: recovering from %s\n", 1277 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1278 "XRUN" : "SUSPEND"); 1279 #endif 1280 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1281 if (ret < 0) 1282 break; 1283 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1284 ret = snd_pcm_oss_prepare(substream); 1285 if (ret < 0) 1286 break; 1287 } 1288 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1289 if (ret < 0) 1290 break; 1291 mutex_unlock(&runtime->oss.params_lock); 1292 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1293 frames, in_kernel); 1294 mutex_lock(&runtime->oss.params_lock); 1295 if (ret == -EPIPE) { 1296 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1297 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1298 if (ret < 0) 1299 break; 1300 } 1301 continue; 1302 } 1303 if (ret != -ESTRPIPE) 1304 break; 1305 } 1306 return ret; 1307 } 1308 1309 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1310 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1311 { 1312 struct snd_pcm_runtime *runtime = substream->runtime; 1313 int ret; 1314 while (1) { 1315 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1316 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1317 #ifdef OSS_DEBUG 1318 pcm_dbg(substream->pcm, 1319 "pcm_oss: writev: recovering from %s\n", 1320 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1321 "XRUN" : "SUSPEND"); 1322 #endif 1323 ret = snd_pcm_oss_prepare(substream); 1324 if (ret < 0) 1325 break; 1326 } 1327 ret = snd_pcm_kernel_writev(substream, bufs, frames); 1328 if (ret != -EPIPE && ret != -ESTRPIPE) 1329 break; 1330 1331 /* test, if we can't store new data, because the stream */ 1332 /* has not been started */ 1333 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1334 return -EAGAIN; 1335 } 1336 return ret; 1337 } 1338 1339 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1340 { 1341 struct snd_pcm_runtime *runtime = substream->runtime; 1342 int ret; 1343 while (1) { 1344 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1345 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1346 #ifdef OSS_DEBUG 1347 pcm_dbg(substream->pcm, 1348 "pcm_oss: readv: recovering from %s\n", 1349 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1350 "XRUN" : "SUSPEND"); 1351 #endif 1352 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1353 if (ret < 0) 1354 break; 1355 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1356 ret = snd_pcm_oss_prepare(substream); 1357 if (ret < 0) 1358 break; 1359 } 1360 ret = snd_pcm_kernel_readv(substream, bufs, frames); 1361 if (ret != -EPIPE && ret != -ESTRPIPE) 1362 break; 1363 } 1364 return ret; 1365 } 1366 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 1367 1368 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1369 { 1370 struct snd_pcm_runtime *runtime = substream->runtime; 1371 snd_pcm_sframes_t frames, frames1; 1372 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1373 if (runtime->oss.plugin_first) { 1374 struct snd_pcm_plugin_channel *channels; 1375 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1376 if (!in_kernel) { 1377 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1378 return -EFAULT; 1379 buf = runtime->oss.buffer; 1380 } 1381 frames = bytes / oss_frame_bytes; 1382 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1383 if (frames1 < 0) 1384 return frames1; 1385 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1386 if (frames1 <= 0) 1387 return frames1; 1388 bytes = frames1 * oss_frame_bytes; 1389 } else 1390 #endif 1391 { 1392 frames = bytes_to_frames(runtime, bytes); 1393 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1394 if (frames1 <= 0) 1395 return frames1; 1396 bytes = frames_to_bytes(runtime, frames1); 1397 } 1398 return bytes; 1399 } 1400 1401 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1402 { 1403 size_t xfer = 0; 1404 ssize_t tmp = 0; 1405 struct snd_pcm_runtime *runtime = substream->runtime; 1406 1407 if (atomic_read(&substream->mmap_count)) 1408 return -ENXIO; 1409 1410 atomic_inc(&runtime->oss.rw_ref); 1411 while (bytes > 0) { 1412 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1413 tmp = -ERESTARTSYS; 1414 break; 1415 } 1416 tmp = snd_pcm_oss_make_ready_locked(substream); 1417 if (tmp < 0) 1418 goto err; 1419 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1420 tmp = bytes; 1421 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1422 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1423 if (tmp > 0) { 1424 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1425 tmp = -EFAULT; 1426 goto err; 1427 } 1428 } 1429 runtime->oss.buffer_used += tmp; 1430 buf += tmp; 1431 bytes -= tmp; 1432 xfer += tmp; 1433 if (substream->oss.setup.partialfrag || 1434 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1435 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1436 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1437 if (tmp <= 0) 1438 goto err; 1439 runtime->oss.bytes += tmp; 1440 runtime->oss.period_ptr += tmp; 1441 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1442 if (runtime->oss.period_ptr == 0 || 1443 runtime->oss.period_ptr == runtime->oss.buffer_used) 1444 runtime->oss.buffer_used = 0; 1445 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1446 tmp = -EAGAIN; 1447 goto err; 1448 } 1449 } 1450 } else { 1451 tmp = snd_pcm_oss_write2(substream, 1452 (const char __force *)buf, 1453 runtime->oss.period_bytes, 0); 1454 if (tmp <= 0) 1455 goto err; 1456 runtime->oss.bytes += tmp; 1457 buf += tmp; 1458 bytes -= tmp; 1459 xfer += tmp; 1460 if ((substream->f_flags & O_NONBLOCK) != 0 && 1461 tmp != runtime->oss.period_bytes) 1462 tmp = -EAGAIN; 1463 } 1464 err: 1465 mutex_unlock(&runtime->oss.params_lock); 1466 if (tmp < 0) 1467 break; 1468 if (signal_pending(current)) { 1469 tmp = -ERESTARTSYS; 1470 break; 1471 } 1472 tmp = 0; 1473 } 1474 atomic_dec(&runtime->oss.rw_ref); 1475 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1476 } 1477 1478 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1479 { 1480 struct snd_pcm_runtime *runtime = substream->runtime; 1481 snd_pcm_sframes_t frames, frames1; 1482 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1483 char __user *final_dst = (char __force __user *)buf; 1484 if (runtime->oss.plugin_first) { 1485 struct snd_pcm_plugin_channel *channels; 1486 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1487 if (!in_kernel) 1488 buf = runtime->oss.buffer; 1489 frames = bytes / oss_frame_bytes; 1490 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1491 if (frames1 < 0) 1492 return frames1; 1493 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1494 if (frames1 <= 0) 1495 return frames1; 1496 bytes = frames1 * oss_frame_bytes; 1497 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1498 return -EFAULT; 1499 } else 1500 #endif 1501 { 1502 frames = bytes_to_frames(runtime, bytes); 1503 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1504 if (frames1 <= 0) 1505 return frames1; 1506 bytes = frames_to_bytes(runtime, frames1); 1507 } 1508 return bytes; 1509 } 1510 1511 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1512 { 1513 size_t xfer = 0; 1514 ssize_t tmp = 0; 1515 struct snd_pcm_runtime *runtime = substream->runtime; 1516 1517 if (atomic_read(&substream->mmap_count)) 1518 return -ENXIO; 1519 1520 atomic_inc(&runtime->oss.rw_ref); 1521 while (bytes > 0) { 1522 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1523 tmp = -ERESTARTSYS; 1524 break; 1525 } 1526 tmp = snd_pcm_oss_make_ready_locked(substream); 1527 if (tmp < 0) 1528 goto err; 1529 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1530 if (runtime->oss.buffer_used == 0) { 1531 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1532 if (tmp <= 0) 1533 goto err; 1534 runtime->oss.bytes += tmp; 1535 runtime->oss.period_ptr = tmp; 1536 runtime->oss.buffer_used = tmp; 1537 } 1538 tmp = bytes; 1539 if ((size_t) tmp > runtime->oss.buffer_used) 1540 tmp = runtime->oss.buffer_used; 1541 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1542 tmp = -EFAULT; 1543 goto err; 1544 } 1545 buf += tmp; 1546 bytes -= tmp; 1547 xfer += tmp; 1548 runtime->oss.buffer_used -= tmp; 1549 } else { 1550 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1551 runtime->oss.period_bytes, 0); 1552 if (tmp <= 0) 1553 goto err; 1554 runtime->oss.bytes += tmp; 1555 buf += tmp; 1556 bytes -= tmp; 1557 xfer += tmp; 1558 } 1559 err: 1560 mutex_unlock(&runtime->oss.params_lock); 1561 if (tmp < 0) 1562 break; 1563 if (signal_pending(current)) { 1564 tmp = -ERESTARTSYS; 1565 break; 1566 } 1567 tmp = 0; 1568 } 1569 atomic_dec(&runtime->oss.rw_ref); 1570 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1571 } 1572 1573 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1574 { 1575 struct snd_pcm_substream *substream; 1576 struct snd_pcm_runtime *runtime; 1577 int i; 1578 1579 for (i = 0; i < 2; i++) { 1580 substream = pcm_oss_file->streams[i]; 1581 if (!substream) 1582 continue; 1583 runtime = substream->runtime; 1584 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1585 mutex_lock(&runtime->oss.params_lock); 1586 runtime->oss.prepare = 1; 1587 runtime->oss.buffer_used = 0; 1588 runtime->oss.prev_hw_ptr_period = 0; 1589 runtime->oss.period_ptr = 0; 1590 mutex_unlock(&runtime->oss.params_lock); 1591 } 1592 return 0; 1593 } 1594 1595 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1596 { 1597 struct snd_pcm_substream *substream; 1598 int err; 1599 1600 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1601 if (substream != NULL) { 1602 err = snd_pcm_oss_make_ready(substream); 1603 if (err < 0) 1604 return err; 1605 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1606 } 1607 /* note: all errors from the start action are ignored */ 1608 /* OSS apps do not know, how to handle them */ 1609 return 0; 1610 } 1611 1612 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1613 { 1614 struct snd_pcm_runtime *runtime; 1615 ssize_t result = 0; 1616 snd_pcm_state_t state; 1617 long res; 1618 wait_queue_entry_t wait; 1619 1620 runtime = substream->runtime; 1621 init_waitqueue_entry(&wait, current); 1622 add_wait_queue(&runtime->sleep, &wait); 1623 #ifdef OSS_DEBUG 1624 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1625 #endif 1626 while (1) { 1627 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1628 if (result > 0) { 1629 runtime->oss.buffer_used = 0; 1630 result = 0; 1631 break; 1632 } 1633 if (result != 0 && result != -EAGAIN) 1634 break; 1635 result = 0; 1636 set_current_state(TASK_INTERRUPTIBLE); 1637 snd_pcm_stream_lock_irq(substream); 1638 state = runtime->status->state; 1639 snd_pcm_stream_unlock_irq(substream); 1640 if (state != SNDRV_PCM_STATE_RUNNING) { 1641 set_current_state(TASK_RUNNING); 1642 break; 1643 } 1644 res = schedule_timeout(10 * HZ); 1645 if (signal_pending(current)) { 1646 result = -ERESTARTSYS; 1647 break; 1648 } 1649 if (res == 0) { 1650 pcm_err(substream->pcm, 1651 "OSS sync error - DMA timeout\n"); 1652 result = -EIO; 1653 break; 1654 } 1655 } 1656 remove_wait_queue(&runtime->sleep, &wait); 1657 return result; 1658 } 1659 1660 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1661 { 1662 int err = 0; 1663 unsigned int saved_f_flags; 1664 struct snd_pcm_substream *substream; 1665 struct snd_pcm_runtime *runtime; 1666 snd_pcm_format_t format; 1667 unsigned long width; 1668 size_t size; 1669 1670 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1671 if (substream != NULL) { 1672 runtime = substream->runtime; 1673 if (atomic_read(&substream->mmap_count)) 1674 goto __direct; 1675 atomic_inc(&runtime->oss.rw_ref); 1676 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1677 atomic_dec(&runtime->oss.rw_ref); 1678 return -ERESTARTSYS; 1679 } 1680 err = snd_pcm_oss_make_ready_locked(substream); 1681 if (err < 0) 1682 goto unlock; 1683 format = snd_pcm_oss_format_from(runtime->oss.format); 1684 width = snd_pcm_format_physical_width(format); 1685 if (runtime->oss.buffer_used > 0) { 1686 #ifdef OSS_DEBUG 1687 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1688 #endif 1689 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1690 snd_pcm_format_set_silence(format, 1691 runtime->oss.buffer + runtime->oss.buffer_used, 1692 size); 1693 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1694 if (err < 0) 1695 goto unlock; 1696 } else if (runtime->oss.period_ptr > 0) { 1697 #ifdef OSS_DEBUG 1698 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1699 #endif 1700 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1701 snd_pcm_format_set_silence(format, 1702 runtime->oss.buffer, 1703 size * 8 / width); 1704 err = snd_pcm_oss_sync1(substream, size); 1705 if (err < 0) 1706 goto unlock; 1707 } 1708 /* 1709 * The ALSA's period might be a bit large than OSS one. 1710 * Fill the remain portion of ALSA period with zeros. 1711 */ 1712 size = runtime->control->appl_ptr % runtime->period_size; 1713 if (size > 0) { 1714 size = runtime->period_size - size; 1715 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) 1716 snd_pcm_lib_write(substream, NULL, size); 1717 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 1718 snd_pcm_lib_writev(substream, NULL, size); 1719 } 1720 unlock: 1721 mutex_unlock(&runtime->oss.params_lock); 1722 atomic_dec(&runtime->oss.rw_ref); 1723 if (err < 0) 1724 return err; 1725 /* 1726 * finish sync: drain the buffer 1727 */ 1728 __direct: 1729 saved_f_flags = substream->f_flags; 1730 substream->f_flags &= ~O_NONBLOCK; 1731 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1732 substream->f_flags = saved_f_flags; 1733 if (err < 0) 1734 return err; 1735 mutex_lock(&runtime->oss.params_lock); 1736 runtime->oss.prepare = 1; 1737 mutex_unlock(&runtime->oss.params_lock); 1738 } 1739 1740 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1741 if (substream != NULL) { 1742 err = snd_pcm_oss_make_ready(substream); 1743 if (err < 0) 1744 return err; 1745 runtime = substream->runtime; 1746 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1747 if (err < 0) 1748 return err; 1749 mutex_lock(&runtime->oss.params_lock); 1750 runtime->oss.buffer_used = 0; 1751 runtime->oss.prepare = 1; 1752 mutex_unlock(&runtime->oss.params_lock); 1753 } 1754 return 0; 1755 } 1756 1757 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1758 { 1759 int idx; 1760 1761 for (idx = 1; idx >= 0; --idx) { 1762 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1763 struct snd_pcm_runtime *runtime; 1764 int err; 1765 1766 if (substream == NULL) 1767 continue; 1768 runtime = substream->runtime; 1769 if (rate < 1000) 1770 rate = 1000; 1771 else if (rate > 192000) 1772 rate = 192000; 1773 err = lock_params(runtime); 1774 if (err < 0) 1775 return err; 1776 if (runtime->oss.rate != rate) { 1777 runtime->oss.params = 1; 1778 runtime->oss.rate = rate; 1779 } 1780 unlock_params(runtime); 1781 } 1782 return snd_pcm_oss_get_rate(pcm_oss_file); 1783 } 1784 1785 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1786 { 1787 struct snd_pcm_substream *substream; 1788 int err; 1789 1790 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1791 if (err < 0) 1792 return err; 1793 return substream->runtime->oss.rate; 1794 } 1795 1796 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1797 { 1798 int idx; 1799 if (channels < 1) 1800 channels = 1; 1801 if (channels > 128) 1802 return -EINVAL; 1803 for (idx = 1; idx >= 0; --idx) { 1804 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1805 struct snd_pcm_runtime *runtime; 1806 int err; 1807 1808 if (substream == NULL) 1809 continue; 1810 runtime = substream->runtime; 1811 err = lock_params(runtime); 1812 if (err < 0) 1813 return err; 1814 if (runtime->oss.channels != channels) { 1815 runtime->oss.params = 1; 1816 runtime->oss.channels = channels; 1817 } 1818 unlock_params(runtime); 1819 } 1820 return snd_pcm_oss_get_channels(pcm_oss_file); 1821 } 1822 1823 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1824 { 1825 struct snd_pcm_substream *substream; 1826 int err; 1827 1828 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1829 if (err < 0) 1830 return err; 1831 return substream->runtime->oss.channels; 1832 } 1833 1834 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1835 { 1836 struct snd_pcm_substream *substream; 1837 int err; 1838 1839 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1840 if (err < 0) 1841 return err; 1842 return substream->runtime->oss.period_bytes; 1843 } 1844 1845 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1846 { 1847 struct snd_pcm_substream *substream; 1848 int err; 1849 int direct; 1850 struct snd_pcm_hw_params *params; 1851 unsigned int formats = 0; 1852 const struct snd_mask *format_mask; 1853 int fmt; 1854 1855 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1856 if (err < 0) 1857 return err; 1858 if (atomic_read(&substream->mmap_count)) 1859 direct = 1; 1860 else 1861 direct = substream->oss.setup.direct; 1862 if (!direct) 1863 return AFMT_MU_LAW | AFMT_U8 | 1864 AFMT_S16_LE | AFMT_S16_BE | 1865 AFMT_S8 | AFMT_U16_LE | 1866 AFMT_U16_BE | 1867 AFMT_S32_LE | AFMT_S32_BE | 1868 AFMT_S24_LE | AFMT_S24_BE | 1869 AFMT_S24_PACKED; 1870 params = kmalloc(sizeof(*params), GFP_KERNEL); 1871 if (!params) 1872 return -ENOMEM; 1873 _snd_pcm_hw_params_any(params); 1874 err = snd_pcm_hw_refine(substream, params); 1875 if (err < 0) 1876 goto error; 1877 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); 1878 for (fmt = 0; fmt < 32; ++fmt) { 1879 if (snd_mask_test(format_mask, fmt)) { 1880 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); 1881 if (f >= 0) 1882 formats |= f; 1883 } 1884 } 1885 1886 error: 1887 kfree(params); 1888 return err < 0 ? err : formats; 1889 } 1890 1891 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1892 { 1893 int formats, idx; 1894 int err; 1895 1896 if (format != AFMT_QUERY) { 1897 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1898 if (formats < 0) 1899 return formats; 1900 if (!(formats & format)) 1901 format = AFMT_U8; 1902 for (idx = 1; idx >= 0; --idx) { 1903 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1904 struct snd_pcm_runtime *runtime; 1905 if (substream == NULL) 1906 continue; 1907 runtime = substream->runtime; 1908 err = lock_params(runtime); 1909 if (err < 0) 1910 return err; 1911 if (runtime->oss.format != format) { 1912 runtime->oss.params = 1; 1913 runtime->oss.format = format; 1914 } 1915 unlock_params(runtime); 1916 } 1917 } 1918 return snd_pcm_oss_get_format(pcm_oss_file); 1919 } 1920 1921 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1922 { 1923 struct snd_pcm_substream *substream; 1924 int err; 1925 1926 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream); 1927 if (err < 0) 1928 return err; 1929 return substream->runtime->oss.format; 1930 } 1931 1932 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1933 { 1934 struct snd_pcm_runtime *runtime; 1935 1936 runtime = substream->runtime; 1937 if (subdivide == 0) { 1938 subdivide = runtime->oss.subdivision; 1939 if (subdivide == 0) 1940 subdivide = 1; 1941 return subdivide; 1942 } 1943 if (runtime->oss.subdivision || runtime->oss.fragshift) 1944 return -EINVAL; 1945 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1946 subdivide != 8 && subdivide != 16) 1947 return -EINVAL; 1948 runtime->oss.subdivision = subdivide; 1949 runtime->oss.params = 1; 1950 return subdivide; 1951 } 1952 1953 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1954 { 1955 int err = -EINVAL, idx; 1956 1957 for (idx = 1; idx >= 0; --idx) { 1958 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1959 struct snd_pcm_runtime *runtime; 1960 1961 if (substream == NULL) 1962 continue; 1963 runtime = substream->runtime; 1964 err = lock_params(runtime); 1965 if (err < 0) 1966 return err; 1967 err = snd_pcm_oss_set_subdivide1(substream, subdivide); 1968 unlock_params(runtime); 1969 if (err < 0) 1970 return err; 1971 } 1972 return err; 1973 } 1974 1975 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1976 { 1977 struct snd_pcm_runtime *runtime; 1978 int fragshift; 1979 1980 runtime = substream->runtime; 1981 if (runtime->oss.subdivision || runtime->oss.fragshift) 1982 return -EINVAL; 1983 fragshift = val & 0xffff; 1984 if (fragshift >= 25) /* should be large enough */ 1985 return -EINVAL; 1986 runtime->oss.fragshift = fragshift; 1987 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1988 if (runtime->oss.fragshift < 4) /* < 16 */ 1989 runtime->oss.fragshift = 4; 1990 if (runtime->oss.maxfrags < 2) 1991 runtime->oss.maxfrags = 2; 1992 runtime->oss.params = 1; 1993 return 0; 1994 } 1995 1996 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1997 { 1998 int err = -EINVAL, idx; 1999 2000 for (idx = 1; idx >= 0; --idx) { 2001 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 2002 struct snd_pcm_runtime *runtime; 2003 2004 if (substream == NULL) 2005 continue; 2006 runtime = substream->runtime; 2007 err = lock_params(runtime); 2008 if (err < 0) 2009 return err; 2010 err = snd_pcm_oss_set_fragment1(substream, val); 2011 unlock_params(runtime); 2012 if (err < 0) 2013 return err; 2014 } 2015 return err; 2016 } 2017 2018 static int snd_pcm_oss_nonblock(struct file * file) 2019 { 2020 spin_lock(&file->f_lock); 2021 file->f_flags |= O_NONBLOCK; 2022 spin_unlock(&file->f_lock); 2023 return 0; 2024 } 2025 2026 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 2027 { 2028 2029 if (substream == NULL) { 2030 res &= ~DSP_CAP_DUPLEX; 2031 return res; 2032 } 2033 #ifdef DSP_CAP_MULTI 2034 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2035 if (substream->pstr->substream_count > 1) 2036 res |= DSP_CAP_MULTI; 2037 #endif 2038 /* DSP_CAP_REALTIME is set all times: */ 2039 /* all ALSA drivers can return actual pointer in ring buffer */ 2040 #if defined(DSP_CAP_REALTIME) && 0 2041 { 2042 struct snd_pcm_runtime *runtime = substream->runtime; 2043 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 2044 res &= ~DSP_CAP_REALTIME; 2045 } 2046 #endif 2047 return res; 2048 } 2049 2050 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 2051 { 2052 int result, idx; 2053 2054 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 2055 for (idx = 0; idx < 2; idx++) { 2056 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 2057 result = snd_pcm_oss_get_caps1(substream, result); 2058 } 2059 result |= 0x0001; /* revision - same as SB AWE 64 */ 2060 return result; 2061 } 2062 2063 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 2064 snd_pcm_uframes_t hw_ptr) 2065 { 2066 struct snd_pcm_runtime *runtime = substream->runtime; 2067 snd_pcm_uframes_t appl_ptr; 2068 appl_ptr = hw_ptr + runtime->buffer_size; 2069 appl_ptr %= runtime->boundary; 2070 runtime->control->appl_ptr = appl_ptr; 2071 } 2072 2073 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 2074 { 2075 struct snd_pcm_runtime *runtime; 2076 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2077 int err, cmd; 2078 2079 #ifdef OSS_DEBUG 2080 pr_debug("pcm_oss: trigger = 0x%x\n", trigger); 2081 #endif 2082 2083 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2084 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2085 2086 if (psubstream) { 2087 err = snd_pcm_oss_make_ready(psubstream); 2088 if (err < 0) 2089 return err; 2090 } 2091 if (csubstream) { 2092 err = snd_pcm_oss_make_ready(csubstream); 2093 if (err < 0) 2094 return err; 2095 } 2096 if (psubstream) { 2097 runtime = psubstream->runtime; 2098 cmd = 0; 2099 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2100 return -ERESTARTSYS; 2101 if (trigger & PCM_ENABLE_OUTPUT) { 2102 if (runtime->oss.trigger) 2103 goto _skip1; 2104 if (atomic_read(&psubstream->mmap_count)) 2105 snd_pcm_oss_simulate_fill(psubstream, 2106 get_hw_ptr_period(runtime)); 2107 runtime->oss.trigger = 1; 2108 runtime->start_threshold = 1; 2109 cmd = SNDRV_PCM_IOCTL_START; 2110 } else { 2111 if (!runtime->oss.trigger) 2112 goto _skip1; 2113 runtime->oss.trigger = 0; 2114 runtime->start_threshold = runtime->boundary; 2115 cmd = SNDRV_PCM_IOCTL_DROP; 2116 runtime->oss.prepare = 1; 2117 } 2118 _skip1: 2119 mutex_unlock(&runtime->oss.params_lock); 2120 if (cmd) { 2121 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2122 if (err < 0) 2123 return err; 2124 } 2125 } 2126 if (csubstream) { 2127 runtime = csubstream->runtime; 2128 cmd = 0; 2129 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2130 return -ERESTARTSYS; 2131 if (trigger & PCM_ENABLE_INPUT) { 2132 if (runtime->oss.trigger) 2133 goto _skip2; 2134 runtime->oss.trigger = 1; 2135 runtime->start_threshold = 1; 2136 cmd = SNDRV_PCM_IOCTL_START; 2137 } else { 2138 if (!runtime->oss.trigger) 2139 goto _skip2; 2140 runtime->oss.trigger = 0; 2141 runtime->start_threshold = runtime->boundary; 2142 cmd = SNDRV_PCM_IOCTL_DROP; 2143 runtime->oss.prepare = 1; 2144 } 2145 _skip2: 2146 mutex_unlock(&runtime->oss.params_lock); 2147 if (cmd) { 2148 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2149 if (err < 0) 2150 return err; 2151 } 2152 } 2153 return 0; 2154 } 2155 2156 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2157 { 2158 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2159 int result = 0; 2160 2161 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2162 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2163 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2164 result |= PCM_ENABLE_OUTPUT; 2165 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2166 result |= PCM_ENABLE_INPUT; 2167 return result; 2168 } 2169 2170 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2171 { 2172 struct snd_pcm_substream *substream; 2173 struct snd_pcm_runtime *runtime; 2174 snd_pcm_sframes_t delay; 2175 int err; 2176 2177 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2178 if (substream == NULL) 2179 return -EINVAL; 2180 err = snd_pcm_oss_make_ready(substream); 2181 if (err < 0) 2182 return err; 2183 runtime = substream->runtime; 2184 if (runtime->oss.params || runtime->oss.prepare) 2185 return 0; 2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2187 if (err == -EPIPE) 2188 delay = 0; /* hack for broken OSS applications */ 2189 else if (err < 0) 2190 return err; 2191 return snd_pcm_oss_bytes(substream, delay); 2192 } 2193 2194 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2195 { 2196 struct snd_pcm_substream *substream; 2197 struct snd_pcm_runtime *runtime; 2198 snd_pcm_sframes_t delay; 2199 int fixup; 2200 struct count_info info; 2201 int err; 2202 2203 if (_info == NULL) 2204 return -EFAULT; 2205 substream = pcm_oss_file->streams[stream]; 2206 if (substream == NULL) 2207 return -EINVAL; 2208 err = snd_pcm_oss_make_ready(substream); 2209 if (err < 0) 2210 return err; 2211 runtime = substream->runtime; 2212 if (runtime->oss.params || runtime->oss.prepare) { 2213 memset(&info, 0, sizeof(info)); 2214 if (copy_to_user(_info, &info, sizeof(info))) 2215 return -EFAULT; 2216 return 0; 2217 } 2218 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2219 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2220 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2221 err = 0; 2222 delay = 0; 2223 fixup = 0; 2224 } else { 2225 fixup = runtime->oss.buffer_used; 2226 } 2227 } else { 2228 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2229 fixup = -runtime->oss.buffer_used; 2230 } 2231 if (err < 0) 2232 return err; 2233 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2234 if (atomic_read(&substream->mmap_count)) { 2235 snd_pcm_sframes_t n; 2236 delay = get_hw_ptr_period(runtime); 2237 n = delay - runtime->oss.prev_hw_ptr_period; 2238 if (n < 0) 2239 n += runtime->boundary; 2240 info.blocks = n / runtime->period_size; 2241 runtime->oss.prev_hw_ptr_period = delay; 2242 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2243 snd_pcm_oss_simulate_fill(substream, delay); 2244 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2245 } else { 2246 delay = snd_pcm_oss_bytes(substream, delay); 2247 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2248 if (substream->oss.setup.buggyptr) 2249 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2250 else 2251 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2252 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2253 } else { 2254 delay += fixup; 2255 info.blocks = delay / runtime->oss.period_bytes; 2256 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2257 } 2258 } 2259 if (copy_to_user(_info, &info, sizeof(info))) 2260 return -EFAULT; 2261 return 0; 2262 } 2263 2264 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2265 { 2266 struct snd_pcm_substream *substream; 2267 struct snd_pcm_runtime *runtime; 2268 snd_pcm_sframes_t avail; 2269 int fixup; 2270 struct audio_buf_info info; 2271 int err; 2272 2273 if (_info == NULL) 2274 return -EFAULT; 2275 substream = pcm_oss_file->streams[stream]; 2276 if (substream == NULL) 2277 return -EINVAL; 2278 runtime = substream->runtime; 2279 2280 if (runtime->oss.params) { 2281 err = snd_pcm_oss_change_params(substream, false); 2282 if (err < 0) 2283 return err; 2284 } 2285 2286 info.fragsize = runtime->oss.period_bytes; 2287 info.fragstotal = runtime->periods; 2288 if (runtime->oss.prepare) { 2289 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2290 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2291 info.fragments = runtime->oss.periods; 2292 } else { 2293 info.bytes = 0; 2294 info.fragments = 0; 2295 } 2296 } else { 2297 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2298 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2299 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2300 avail = runtime->buffer_size; 2301 err = 0; 2302 fixup = 0; 2303 } else { 2304 avail = runtime->buffer_size - avail; 2305 fixup = -runtime->oss.buffer_used; 2306 } 2307 } else { 2308 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2309 fixup = runtime->oss.buffer_used; 2310 } 2311 if (err < 0) 2312 return err; 2313 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2314 info.fragments = info.bytes / runtime->oss.period_bytes; 2315 } 2316 2317 #ifdef OSS_DEBUG 2318 pcm_dbg(substream->pcm, 2319 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2320 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2321 #endif 2322 if (copy_to_user(_info, &info, sizeof(info))) 2323 return -EFAULT; 2324 return 0; 2325 } 2326 2327 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2328 { 2329 // it won't be probably implemented 2330 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2331 return -EINVAL; 2332 } 2333 2334 static const char *strip_task_path(const char *path) 2335 { 2336 const char *ptr, *ptrl = NULL; 2337 for (ptr = path; *ptr; ptr++) { 2338 if (*ptr == '/') 2339 ptrl = ptr + 1; 2340 } 2341 return ptrl; 2342 } 2343 2344 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2345 const char *task_name, 2346 struct snd_pcm_oss_setup *rsetup) 2347 { 2348 struct snd_pcm_oss_setup *setup; 2349 2350 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2351 do { 2352 for (setup = pcm->streams[stream].oss.setup_list; setup; 2353 setup = setup->next) { 2354 if (!strcmp(setup->task_name, task_name)) 2355 goto out; 2356 } 2357 } while ((task_name = strip_task_path(task_name)) != NULL); 2358 out: 2359 if (setup) 2360 *rsetup = *setup; 2361 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2362 } 2363 2364 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2365 { 2366 snd_pcm_oss_release_buffers(substream); 2367 substream->oss.oss = 0; 2368 } 2369 2370 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2371 struct snd_pcm_oss_setup *setup, 2372 int minor) 2373 { 2374 struct snd_pcm_runtime *runtime; 2375 2376 substream->oss.oss = 1; 2377 substream->oss.setup = *setup; 2378 if (setup->nonblock) 2379 substream->f_flags |= O_NONBLOCK; 2380 else if (setup->block) 2381 substream->f_flags &= ~O_NONBLOCK; 2382 runtime = substream->runtime; 2383 runtime->oss.params = 1; 2384 runtime->oss.trigger = 1; 2385 runtime->oss.rate = 8000; 2386 mutex_init(&runtime->oss.params_lock); 2387 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2388 case SNDRV_MINOR_OSS_PCM_8: 2389 runtime->oss.format = AFMT_U8; 2390 break; 2391 case SNDRV_MINOR_OSS_PCM_16: 2392 runtime->oss.format = AFMT_S16_LE; 2393 break; 2394 default: 2395 runtime->oss.format = AFMT_MU_LAW; 2396 } 2397 runtime->oss.channels = 1; 2398 runtime->oss.fragshift = 0; 2399 runtime->oss.maxfrags = 0; 2400 runtime->oss.subdivision = 0; 2401 substream->pcm_release = snd_pcm_oss_release_substream; 2402 atomic_set(&runtime->oss.rw_ref, 0); 2403 } 2404 2405 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2406 { 2407 int cidx; 2408 if (!pcm_oss_file) 2409 return 0; 2410 for (cidx = 0; cidx < 2; ++cidx) { 2411 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2412 if (substream) 2413 snd_pcm_release_substream(substream); 2414 } 2415 kfree(pcm_oss_file); 2416 return 0; 2417 } 2418 2419 static int snd_pcm_oss_open_file(struct file *file, 2420 struct snd_pcm *pcm, 2421 struct snd_pcm_oss_file **rpcm_oss_file, 2422 int minor, 2423 struct snd_pcm_oss_setup *setup) 2424 { 2425 int idx, err; 2426 struct snd_pcm_oss_file *pcm_oss_file; 2427 struct snd_pcm_substream *substream; 2428 fmode_t f_mode = file->f_mode; 2429 2430 if (rpcm_oss_file) 2431 *rpcm_oss_file = NULL; 2432 2433 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2434 if (pcm_oss_file == NULL) 2435 return -ENOMEM; 2436 2437 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2438 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2439 f_mode = FMODE_WRITE; 2440 2441 file->f_flags &= ~O_APPEND; 2442 for (idx = 0; idx < 2; idx++) { 2443 if (setup[idx].disable) 2444 continue; 2445 if (! pcm->streams[idx].substream_count) 2446 continue; /* no matching substream */ 2447 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2448 if (! (f_mode & FMODE_WRITE)) 2449 continue; 2450 } else { 2451 if (! (f_mode & FMODE_READ)) 2452 continue; 2453 } 2454 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2455 if (err < 0) { 2456 snd_pcm_oss_release_file(pcm_oss_file); 2457 return err; 2458 } 2459 2460 pcm_oss_file->streams[idx] = substream; 2461 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2462 } 2463 2464 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2465 snd_pcm_oss_release_file(pcm_oss_file); 2466 return -EINVAL; 2467 } 2468 2469 file->private_data = pcm_oss_file; 2470 if (rpcm_oss_file) 2471 *rpcm_oss_file = pcm_oss_file; 2472 return 0; 2473 } 2474 2475 2476 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2477 { 2478 unsigned int idx; 2479 2480 if (snd_BUG_ON(!task || !name || size < 2)) 2481 return -EINVAL; 2482 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2483 name[idx] = task->comm[idx]; 2484 name[idx] = '\0'; 2485 return 0; 2486 } 2487 2488 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2489 { 2490 int err; 2491 char task_name[32]; 2492 struct snd_pcm *pcm; 2493 struct snd_pcm_oss_file *pcm_oss_file; 2494 struct snd_pcm_oss_setup setup[2]; 2495 int nonblock; 2496 wait_queue_entry_t wait; 2497 2498 err = nonseekable_open(inode, file); 2499 if (err < 0) 2500 return err; 2501 2502 pcm = snd_lookup_oss_minor_data(iminor(inode), 2503 SNDRV_OSS_DEVICE_TYPE_PCM); 2504 if (pcm == NULL) { 2505 err = -ENODEV; 2506 goto __error1; 2507 } 2508 err = snd_card_file_add(pcm->card, file); 2509 if (err < 0) 2510 goto __error1; 2511 if (!try_module_get(pcm->card->module)) { 2512 err = -EFAULT; 2513 goto __error2; 2514 } 2515 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2516 err = -EFAULT; 2517 goto __error; 2518 } 2519 memset(setup, 0, sizeof(setup)); 2520 if (file->f_mode & FMODE_WRITE) 2521 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2522 task_name, &setup[0]); 2523 if (file->f_mode & FMODE_READ) 2524 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2525 task_name, &setup[1]); 2526 2527 nonblock = !!(file->f_flags & O_NONBLOCK); 2528 if (!nonblock) 2529 nonblock = nonblock_open; 2530 2531 init_waitqueue_entry(&wait, current); 2532 add_wait_queue(&pcm->open_wait, &wait); 2533 mutex_lock(&pcm->open_mutex); 2534 while (1) { 2535 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2536 iminor(inode), setup); 2537 if (err >= 0) 2538 break; 2539 if (err == -EAGAIN) { 2540 if (nonblock) { 2541 err = -EBUSY; 2542 break; 2543 } 2544 } else 2545 break; 2546 set_current_state(TASK_INTERRUPTIBLE); 2547 mutex_unlock(&pcm->open_mutex); 2548 schedule(); 2549 mutex_lock(&pcm->open_mutex); 2550 if (pcm->card->shutdown) { 2551 err = -ENODEV; 2552 break; 2553 } 2554 if (signal_pending(current)) { 2555 err = -ERESTARTSYS; 2556 break; 2557 } 2558 } 2559 remove_wait_queue(&pcm->open_wait, &wait); 2560 mutex_unlock(&pcm->open_mutex); 2561 if (err < 0) 2562 goto __error; 2563 snd_card_unref(pcm->card); 2564 return err; 2565 2566 __error: 2567 module_put(pcm->card->module); 2568 __error2: 2569 snd_card_file_remove(pcm->card, file); 2570 __error1: 2571 if (pcm) 2572 snd_card_unref(pcm->card); 2573 return err; 2574 } 2575 2576 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2577 { 2578 struct snd_pcm *pcm; 2579 struct snd_pcm_substream *substream; 2580 struct snd_pcm_oss_file *pcm_oss_file; 2581 2582 pcm_oss_file = file->private_data; 2583 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2584 if (substream == NULL) 2585 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2586 if (snd_BUG_ON(!substream)) 2587 return -ENXIO; 2588 pcm = substream->pcm; 2589 if (!pcm->card->shutdown) 2590 snd_pcm_oss_sync(pcm_oss_file); 2591 mutex_lock(&pcm->open_mutex); 2592 snd_pcm_oss_release_file(pcm_oss_file); 2593 mutex_unlock(&pcm->open_mutex); 2594 wake_up(&pcm->open_wait); 2595 module_put(pcm->card->module); 2596 snd_card_file_remove(pcm->card, file); 2597 return 0; 2598 } 2599 2600 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2601 { 2602 struct snd_pcm_oss_file *pcm_oss_file; 2603 int __user *p = (int __user *)arg; 2604 int res; 2605 2606 pcm_oss_file = file->private_data; 2607 if (cmd == OSS_GETVERSION) 2608 return put_user(SNDRV_OSS_VERSION, p); 2609 if (cmd == OSS_ALSAEMULVER) 2610 return put_user(1, p); 2611 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2612 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2613 struct snd_pcm_substream *substream; 2614 int idx; 2615 for (idx = 0; idx < 2; ++idx) { 2616 substream = pcm_oss_file->streams[idx]; 2617 if (substream != NULL) 2618 break; 2619 } 2620 if (snd_BUG_ON(idx >= 2)) 2621 return -ENXIO; 2622 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2623 } 2624 #endif 2625 if (((cmd >> 8) & 0xff) != 'P') 2626 return -EINVAL; 2627 #ifdef OSS_DEBUG 2628 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2629 #endif 2630 switch (cmd) { 2631 case SNDCTL_DSP_RESET: 2632 return snd_pcm_oss_reset(pcm_oss_file); 2633 case SNDCTL_DSP_SYNC: 2634 return snd_pcm_oss_sync(pcm_oss_file); 2635 case SNDCTL_DSP_SPEED: 2636 if (get_user(res, p)) 2637 return -EFAULT; 2638 res = snd_pcm_oss_set_rate(pcm_oss_file, res); 2639 if (res < 0) 2640 return res; 2641 return put_user(res, p); 2642 case SOUND_PCM_READ_RATE: 2643 res = snd_pcm_oss_get_rate(pcm_oss_file); 2644 if (res < 0) 2645 return res; 2646 return put_user(res, p); 2647 case SNDCTL_DSP_STEREO: 2648 if (get_user(res, p)) 2649 return -EFAULT; 2650 res = res > 0 ? 2 : 1; 2651 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2652 if (res < 0) 2653 return res; 2654 return put_user(--res, p); 2655 case SNDCTL_DSP_GETBLKSIZE: 2656 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2657 if (res < 0) 2658 return res; 2659 return put_user(res, p); 2660 case SNDCTL_DSP_SETFMT: 2661 if (get_user(res, p)) 2662 return -EFAULT; 2663 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2664 if (res < 0) 2665 return res; 2666 return put_user(res, p); 2667 case SOUND_PCM_READ_BITS: 2668 res = snd_pcm_oss_get_format(pcm_oss_file); 2669 if (res < 0) 2670 return res; 2671 return put_user(res, p); 2672 case SNDCTL_DSP_CHANNELS: 2673 if (get_user(res, p)) 2674 return -EFAULT; 2675 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2676 if (res < 0) 2677 return res; 2678 return put_user(res, p); 2679 case SOUND_PCM_READ_CHANNELS: 2680 res = snd_pcm_oss_get_channels(pcm_oss_file); 2681 if (res < 0) 2682 return res; 2683 return put_user(res, p); 2684 case SOUND_PCM_WRITE_FILTER: 2685 case SOUND_PCM_READ_FILTER: 2686 return -EIO; 2687 case SNDCTL_DSP_POST: 2688 return snd_pcm_oss_post(pcm_oss_file); 2689 case SNDCTL_DSP_SUBDIVIDE: 2690 if (get_user(res, p)) 2691 return -EFAULT; 2692 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2693 if (res < 0) 2694 return res; 2695 return put_user(res, p); 2696 case SNDCTL_DSP_SETFRAGMENT: 2697 if (get_user(res, p)) 2698 return -EFAULT; 2699 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2700 case SNDCTL_DSP_GETFMTS: 2701 res = snd_pcm_oss_get_formats(pcm_oss_file); 2702 if (res < 0) 2703 return res; 2704 return put_user(res, p); 2705 case SNDCTL_DSP_GETOSPACE: 2706 case SNDCTL_DSP_GETISPACE: 2707 return snd_pcm_oss_get_space(pcm_oss_file, 2708 cmd == SNDCTL_DSP_GETISPACE ? 2709 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2710 (struct audio_buf_info __user *) arg); 2711 case SNDCTL_DSP_NONBLOCK: 2712 return snd_pcm_oss_nonblock(file); 2713 case SNDCTL_DSP_GETCAPS: 2714 res = snd_pcm_oss_get_caps(pcm_oss_file); 2715 if (res < 0) 2716 return res; 2717 return put_user(res, p); 2718 case SNDCTL_DSP_GETTRIGGER: 2719 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2720 if (res < 0) 2721 return res; 2722 return put_user(res, p); 2723 case SNDCTL_DSP_SETTRIGGER: 2724 if (get_user(res, p)) 2725 return -EFAULT; 2726 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2727 case SNDCTL_DSP_GETIPTR: 2728 case SNDCTL_DSP_GETOPTR: 2729 return snd_pcm_oss_get_ptr(pcm_oss_file, 2730 cmd == SNDCTL_DSP_GETIPTR ? 2731 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2732 (struct count_info __user *) arg); 2733 case SNDCTL_DSP_MAPINBUF: 2734 case SNDCTL_DSP_MAPOUTBUF: 2735 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2736 cmd == SNDCTL_DSP_MAPINBUF ? 2737 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2738 (struct buffmem_desc __user *) arg); 2739 case SNDCTL_DSP_SETSYNCRO: 2740 /* stop DMA now.. */ 2741 return 0; 2742 case SNDCTL_DSP_SETDUPLEX: 2743 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2744 return 0; 2745 return -EIO; 2746 case SNDCTL_DSP_GETODELAY: 2747 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2748 if (res < 0) { 2749 /* it's for sure, some broken apps don't check for error codes */ 2750 put_user(0, p); 2751 return res; 2752 } 2753 return put_user(res, p); 2754 case SNDCTL_DSP_PROFILE: 2755 return 0; /* silently ignore */ 2756 default: 2757 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2758 } 2759 return -EINVAL; 2760 } 2761 2762 #ifdef CONFIG_COMPAT 2763 /* all compatible */ 2764 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2765 unsigned long arg) 2766 { 2767 /* 2768 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF, 2769 * which are not implemented for the native case either 2770 */ 2771 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2772 } 2773 #else 2774 #define snd_pcm_oss_ioctl_compat NULL 2775 #endif 2776 2777 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2778 { 2779 struct snd_pcm_oss_file *pcm_oss_file; 2780 struct snd_pcm_substream *substream; 2781 2782 pcm_oss_file = file->private_data; 2783 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2784 if (substream == NULL) 2785 return -ENXIO; 2786 substream->f_flags = file->f_flags & O_NONBLOCK; 2787 #ifndef OSS_DEBUG 2788 return snd_pcm_oss_read1(substream, buf, count); 2789 #else 2790 { 2791 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2792 pcm_dbg(substream->pcm, 2793 "pcm_oss: read %li bytes (returned %li bytes)\n", 2794 (long)count, (long)res); 2795 return res; 2796 } 2797 #endif 2798 } 2799 2800 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2801 { 2802 struct snd_pcm_oss_file *pcm_oss_file; 2803 struct snd_pcm_substream *substream; 2804 long result; 2805 2806 pcm_oss_file = file->private_data; 2807 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2808 if (substream == NULL) 2809 return -ENXIO; 2810 substream->f_flags = file->f_flags & O_NONBLOCK; 2811 result = snd_pcm_oss_write1(substream, buf, count); 2812 #ifdef OSS_DEBUG 2813 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2814 (long)count, (long)result); 2815 #endif 2816 return result; 2817 } 2818 2819 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2820 { 2821 struct snd_pcm_runtime *runtime = substream->runtime; 2822 if (atomic_read(&substream->mmap_count)) 2823 return runtime->oss.prev_hw_ptr_period != 2824 get_hw_ptr_period(runtime); 2825 else 2826 return snd_pcm_playback_avail(runtime) >= 2827 runtime->oss.period_frames; 2828 } 2829 2830 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2831 { 2832 struct snd_pcm_runtime *runtime = substream->runtime; 2833 if (atomic_read(&substream->mmap_count)) 2834 return runtime->oss.prev_hw_ptr_period != 2835 get_hw_ptr_period(runtime); 2836 else 2837 return snd_pcm_capture_avail(runtime) >= 2838 runtime->oss.period_frames; 2839 } 2840 2841 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) 2842 { 2843 struct snd_pcm_oss_file *pcm_oss_file; 2844 __poll_t mask; 2845 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2846 2847 pcm_oss_file = file->private_data; 2848 2849 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2850 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2851 2852 mask = 0; 2853 if (psubstream != NULL) { 2854 struct snd_pcm_runtime *runtime = psubstream->runtime; 2855 poll_wait(file, &runtime->sleep, wait); 2856 snd_pcm_stream_lock_irq(psubstream); 2857 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2858 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2859 snd_pcm_oss_playback_ready(psubstream))) 2860 mask |= EPOLLOUT | EPOLLWRNORM; 2861 snd_pcm_stream_unlock_irq(psubstream); 2862 } 2863 if (csubstream != NULL) { 2864 struct snd_pcm_runtime *runtime = csubstream->runtime; 2865 snd_pcm_state_t ostate; 2866 poll_wait(file, &runtime->sleep, wait); 2867 snd_pcm_stream_lock_irq(csubstream); 2868 ostate = runtime->status->state; 2869 if (ostate != SNDRV_PCM_STATE_RUNNING || 2870 snd_pcm_oss_capture_ready(csubstream)) 2871 mask |= EPOLLIN | EPOLLRDNORM; 2872 snd_pcm_stream_unlock_irq(csubstream); 2873 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2874 struct snd_pcm_oss_file ofile; 2875 memset(&ofile, 0, sizeof(ofile)); 2876 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2877 runtime->oss.trigger = 0; 2878 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2879 } 2880 } 2881 2882 return mask; 2883 } 2884 2885 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2886 { 2887 struct snd_pcm_oss_file *pcm_oss_file; 2888 struct snd_pcm_substream *substream = NULL; 2889 struct snd_pcm_runtime *runtime; 2890 int err; 2891 2892 #ifdef OSS_DEBUG 2893 pr_debug("pcm_oss: mmap begin\n"); 2894 #endif 2895 pcm_oss_file = file->private_data; 2896 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2897 case VM_READ | VM_WRITE: 2898 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2899 if (substream) 2900 break; 2901 fallthrough; 2902 case VM_READ: 2903 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2904 break; 2905 case VM_WRITE: 2906 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2907 break; 2908 default: 2909 return -EINVAL; 2910 } 2911 /* set VM_READ access as well to fix memset() routines that do 2912 reads before writes (to improve performance) */ 2913 area->vm_flags |= VM_READ; 2914 if (substream == NULL) 2915 return -ENXIO; 2916 runtime = substream->runtime; 2917 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2918 return -EIO; 2919 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2920 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2921 else 2922 return -EIO; 2923 2924 if (runtime->oss.params) { 2925 /* use mutex_trylock() for params_lock for avoiding a deadlock 2926 * between mmap_lock and params_lock taken by 2927 * copy_from/to_user() in snd_pcm_oss_write/read() 2928 */ 2929 err = snd_pcm_oss_change_params(substream, true); 2930 if (err < 0) 2931 return err; 2932 } 2933 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2934 if (runtime->oss.plugin_first != NULL) 2935 return -EIO; 2936 #endif 2937 2938 if (area->vm_pgoff != 0) 2939 return -EINVAL; 2940 2941 err = snd_pcm_mmap_data(substream, file, area); 2942 if (err < 0) 2943 return err; 2944 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2945 runtime->silence_threshold = 0; 2946 runtime->silence_size = 0; 2947 #ifdef OSS_DEBUG 2948 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2949 runtime->oss.mmap_bytes); 2950 #endif 2951 /* In mmap mode we never stop */ 2952 runtime->stop_threshold = runtime->boundary; 2953 2954 return 0; 2955 } 2956 2957 #ifdef CONFIG_SND_VERBOSE_PROCFS 2958 /* 2959 * /proc interface 2960 */ 2961 2962 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2963 struct snd_info_buffer *buffer) 2964 { 2965 struct snd_pcm_str *pstr = entry->private_data; 2966 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2967 mutex_lock(&pstr->oss.setup_mutex); 2968 while (setup) { 2969 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2970 setup->task_name, 2971 setup->periods, 2972 setup->period_size, 2973 setup->disable ? " disable" : "", 2974 setup->direct ? " direct" : "", 2975 setup->block ? " block" : "", 2976 setup->nonblock ? " non-block" : "", 2977 setup->partialfrag ? " partial-frag" : "", 2978 setup->nosilence ? " no-silence" : ""); 2979 setup = setup->next; 2980 } 2981 mutex_unlock(&pstr->oss.setup_mutex); 2982 } 2983 2984 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2985 { 2986 struct snd_pcm_oss_setup *setup, *setupn; 2987 2988 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2989 setup; setup = setupn) { 2990 setupn = setup->next; 2991 kfree(setup->task_name); 2992 kfree(setup); 2993 } 2994 pstr->oss.setup_list = NULL; 2995 } 2996 2997 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2998 struct snd_info_buffer *buffer) 2999 { 3000 struct snd_pcm_str *pstr = entry->private_data; 3001 char line[128], str[32], task_name[32]; 3002 const char *ptr; 3003 int idx1; 3004 struct snd_pcm_oss_setup *setup, *setup1, template; 3005 3006 while (!snd_info_get_line(buffer, line, sizeof(line))) { 3007 mutex_lock(&pstr->oss.setup_mutex); 3008 memset(&template, 0, sizeof(template)); 3009 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 3010 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 3011 snd_pcm_oss_proc_free_setup_list(pstr); 3012 mutex_unlock(&pstr->oss.setup_mutex); 3013 continue; 3014 } 3015 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 3016 if (!strcmp(setup->task_name, task_name)) { 3017 template = *setup; 3018 break; 3019 } 3020 } 3021 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3022 template.periods = simple_strtoul(str, NULL, 10); 3023 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3024 template.period_size = simple_strtoul(str, NULL, 10); 3025 for (idx1 = 31; idx1 >= 0; idx1--) 3026 if (template.period_size & (1 << idx1)) 3027 break; 3028 for (idx1--; idx1 >= 0; idx1--) 3029 template.period_size &= ~(1 << idx1); 3030 do { 3031 ptr = snd_info_get_str(str, ptr, sizeof(str)); 3032 if (!strcmp(str, "disable")) { 3033 template.disable = 1; 3034 } else if (!strcmp(str, "direct")) { 3035 template.direct = 1; 3036 } else if (!strcmp(str, "block")) { 3037 template.block = 1; 3038 } else if (!strcmp(str, "non-block")) { 3039 template.nonblock = 1; 3040 } else if (!strcmp(str, "partial-frag")) { 3041 template.partialfrag = 1; 3042 } else if (!strcmp(str, "no-silence")) { 3043 template.nosilence = 1; 3044 } else if (!strcmp(str, "buggy-ptr")) { 3045 template.buggyptr = 1; 3046 } 3047 } while (*str); 3048 if (setup == NULL) { 3049 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 3050 if (! setup) { 3051 buffer->error = -ENOMEM; 3052 mutex_unlock(&pstr->oss.setup_mutex); 3053 return; 3054 } 3055 if (pstr->oss.setup_list == NULL) 3056 pstr->oss.setup_list = setup; 3057 else { 3058 for (setup1 = pstr->oss.setup_list; 3059 setup1->next; setup1 = setup1->next); 3060 setup1->next = setup; 3061 } 3062 template.task_name = kstrdup(task_name, GFP_KERNEL); 3063 if (! template.task_name) { 3064 kfree(setup); 3065 buffer->error = -ENOMEM; 3066 mutex_unlock(&pstr->oss.setup_mutex); 3067 return; 3068 } 3069 } 3070 *setup = template; 3071 mutex_unlock(&pstr->oss.setup_mutex); 3072 } 3073 } 3074 3075 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3076 { 3077 int stream; 3078 for (stream = 0; stream < 2; ++stream) { 3079 struct snd_info_entry *entry; 3080 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3081 if (pstr->substream_count == 0) 3082 continue; 3083 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root); 3084 if (entry) { 3085 entry->content = SNDRV_INFO_CONTENT_TEXT; 3086 entry->mode = S_IFREG | 0644; 3087 entry->c.text.read = snd_pcm_oss_proc_read; 3088 entry->c.text.write = snd_pcm_oss_proc_write; 3089 entry->private_data = pstr; 3090 if (snd_info_register(entry) < 0) { 3091 snd_info_free_entry(entry); 3092 entry = NULL; 3093 } 3094 } 3095 pstr->oss.proc_entry = entry; 3096 } 3097 } 3098 3099 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3100 { 3101 int stream; 3102 for (stream = 0; stream < 2; ++stream) { 3103 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3104 snd_info_free_entry(pstr->oss.proc_entry); 3105 pstr->oss.proc_entry = NULL; 3106 snd_pcm_oss_proc_free_setup_list(pstr); 3107 } 3108 } 3109 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 3110 static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3111 { 3112 } 3113 static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3114 { 3115 } 3116 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 3117 3118 /* 3119 * ENTRY functions 3120 */ 3121 3122 static const struct file_operations snd_pcm_oss_f_reg = 3123 { 3124 .owner = THIS_MODULE, 3125 .read = snd_pcm_oss_read, 3126 .write = snd_pcm_oss_write, 3127 .open = snd_pcm_oss_open, 3128 .release = snd_pcm_oss_release, 3129 .llseek = no_llseek, 3130 .poll = snd_pcm_oss_poll, 3131 .unlocked_ioctl = snd_pcm_oss_ioctl, 3132 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3133 .mmap = snd_pcm_oss_mmap, 3134 }; 3135 3136 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3137 { 3138 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3139 pcm->card, index, &snd_pcm_oss_f_reg, 3140 pcm) < 0) { 3141 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3142 pcm->card->number, pcm->device); 3143 } 3144 } 3145 3146 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3147 { 3148 pcm->oss.reg = 0; 3149 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3150 char name[128]; 3151 int duplex; 3152 register_oss_dsp(pcm, 0); 3153 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3154 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3155 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3156 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3157 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3158 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3159 pcm->card->number, 3160 name); 3161 #endif 3162 pcm->oss.reg++; 3163 pcm->oss.reg_mask |= 1; 3164 } 3165 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3166 register_oss_dsp(pcm, 1); 3167 pcm->oss.reg++; 3168 pcm->oss.reg_mask |= 2; 3169 } 3170 3171 if (pcm->oss.reg) 3172 snd_pcm_oss_proc_init(pcm); 3173 3174 return 0; 3175 } 3176 3177 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3178 { 3179 if (pcm->oss.reg) { 3180 if (pcm->oss.reg_mask & 1) { 3181 pcm->oss.reg_mask &= ~1; 3182 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3183 pcm->card, 0); 3184 } 3185 if (pcm->oss.reg_mask & 2) { 3186 pcm->oss.reg_mask &= ~2; 3187 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3188 pcm->card, 1); 3189 } 3190 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3191 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3192 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3193 #endif 3194 } 3195 pcm->oss.reg = 0; 3196 } 3197 return 0; 3198 } 3199 3200 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3201 { 3202 snd_pcm_oss_disconnect_minor(pcm); 3203 snd_pcm_oss_proc_done(pcm); 3204 return 0; 3205 } 3206 3207 static struct snd_pcm_notify snd_pcm_oss_notify = 3208 { 3209 .n_register = snd_pcm_oss_register_minor, 3210 .n_disconnect = snd_pcm_oss_disconnect_minor, 3211 .n_unregister = snd_pcm_oss_unregister_minor, 3212 }; 3213 3214 static int __init alsa_pcm_oss_init(void) 3215 { 3216 int i; 3217 int err; 3218 3219 /* check device map table */ 3220 for (i = 0; i < SNDRV_CARDS; i++) { 3221 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3222 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3223 i, dsp_map[i]); 3224 dsp_map[i] = 0; 3225 } 3226 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3227 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3228 i, adsp_map[i]); 3229 adsp_map[i] = 1; 3230 } 3231 } 3232 err = snd_pcm_notify(&snd_pcm_oss_notify, 0); 3233 if (err < 0) 3234 return err; 3235 return 0; 3236 } 3237 3238 static void __exit alsa_pcm_oss_exit(void) 3239 { 3240 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3241 } 3242 3243 module_init(alsa_pcm_oss_init) 3244 module_exit(alsa_pcm_oss_exit) 3245