1 /* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #if 0 23 #define PLUGIN_DEBUG 24 #endif 25 #if 0 26 #define OSS_DEBUG 27 #endif 28 29 #include <sound/driver.h> 30 #include <linux/init.h> 31 #include <linux/smp_lock.h> 32 #include <linux/slab.h> 33 #include <linux/time.h> 34 #include <linux/vmalloc.h> 35 #include <linux/moduleparam.h> 36 #include <linux/string.h> 37 #include <sound/core.h> 38 #include <sound/minors.h> 39 #include <sound/pcm.h> 40 #include <sound/pcm_params.h> 41 #include "pcm_plugin.h" 42 #include <sound/info.h> 43 #include <linux/soundcard.h> 44 #include <sound/initval.h> 45 46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 47 48 static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0}; 49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 50 static int nonblock_open = 1; 51 52 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 54 MODULE_LICENSE("GPL"); 55 module_param_array(dsp_map, int, NULL, 0444); 56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 57 module_param_array(adsp_map, int, NULL, 0444); 58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 59 module_param(nonblock_open, bool, 0644); 60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 63 64 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg); 65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 68 69 static inline mm_segment_t snd_enter_user(void) 70 { 71 mm_segment_t fs = get_fs(); 72 set_fs(get_ds()); 73 return fs; 74 } 75 76 static inline void snd_leave_user(mm_segment_t fs) 77 { 78 set_fs(fs); 79 } 80 81 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 82 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 83 { 84 struct snd_pcm_runtime *runtime = substream->runtime; 85 struct snd_pcm_plugin *plugin, *next; 86 87 plugin = runtime->oss.plugin_first; 88 while (plugin) { 89 next = plugin->next; 90 snd_pcm_plugin_free(plugin); 91 plugin = next; 92 } 93 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 94 return 0; 95 } 96 97 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 98 { 99 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 100 plugin->next = runtime->oss.plugin_first; 101 plugin->prev = NULL; 102 if (runtime->oss.plugin_first) { 103 runtime->oss.plugin_first->prev = plugin; 104 runtime->oss.plugin_first = plugin; 105 } else { 106 runtime->oss.plugin_last = 107 runtime->oss.plugin_first = plugin; 108 } 109 return 0; 110 } 111 112 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 113 { 114 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 115 plugin->next = NULL; 116 plugin->prev = runtime->oss.plugin_last; 117 if (runtime->oss.plugin_last) { 118 runtime->oss.plugin_last->next = plugin; 119 runtime->oss.plugin_last = plugin; 120 } else { 121 runtime->oss.plugin_last = 122 runtime->oss.plugin_first = plugin; 123 } 124 return 0; 125 } 126 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 127 128 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 129 { 130 struct snd_pcm_runtime *runtime = substream->runtime; 131 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 132 long bytes = frames_to_bytes(runtime, frames); 133 if (buffer_size == runtime->oss.buffer_bytes) 134 return bytes; 135 #if BITS_PER_LONG >= 64 136 return runtime->oss.buffer_bytes * bytes / buffer_size; 137 #else 138 { 139 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 140 u32 rem; 141 div64_32(&bsize, buffer_size, &rem); 142 return (long)bsize; 143 } 144 #endif 145 } 146 147 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 148 { 149 struct snd_pcm_runtime *runtime = substream->runtime; 150 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 151 if (buffer_size == runtime->oss.buffer_bytes) 152 return bytes_to_frames(runtime, bytes); 153 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 154 } 155 156 static int snd_pcm_oss_format_from(int format) 157 { 158 switch (format) { 159 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 160 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 161 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 162 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 163 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 164 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 165 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 166 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 167 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 168 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 169 default: return SNDRV_PCM_FORMAT_U8; 170 } 171 } 172 173 static int snd_pcm_oss_format_to(int format) 174 { 175 switch (format) { 176 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 177 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 178 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 179 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 180 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 181 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 182 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 183 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 184 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 185 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 186 default: return -EINVAL; 187 } 188 } 189 190 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 191 struct snd_pcm_hw_params *oss_params, 192 struct snd_pcm_hw_params *slave_params) 193 { 194 size_t s; 195 size_t oss_buffer_size, oss_period_size, oss_periods; 196 size_t min_period_size, max_period_size; 197 struct snd_pcm_runtime *runtime = substream->runtime; 198 size_t oss_frame_size; 199 200 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 201 params_channels(oss_params) / 8; 202 203 oss_buffer_size = snd_pcm_plug_client_size(substream, 204 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 205 oss_buffer_size = 1 << ld2(oss_buffer_size); 206 if (atomic_read(&runtime->mmap_count)) { 207 if (oss_buffer_size > runtime->oss.mmap_bytes) 208 oss_buffer_size = runtime->oss.mmap_bytes; 209 } 210 211 if (substream->oss.setup.period_size > 16) 212 oss_period_size = substream->oss.setup.period_size; 213 else if (runtime->oss.fragshift) { 214 oss_period_size = 1 << runtime->oss.fragshift; 215 if (oss_period_size > oss_buffer_size / 2) 216 oss_period_size = oss_buffer_size / 2; 217 } else { 218 int sd; 219 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 220 221 oss_period_size = oss_buffer_size; 222 do { 223 oss_period_size /= 2; 224 } while (oss_period_size > bytes_per_sec); 225 if (runtime->oss.subdivision == 0) { 226 sd = 4; 227 if (oss_period_size / sd > 4096) 228 sd *= 2; 229 if (oss_period_size / sd < 4096) 230 sd = 1; 231 } else 232 sd = runtime->oss.subdivision; 233 oss_period_size /= sd; 234 if (oss_period_size < 16) 235 oss_period_size = 16; 236 } 237 238 min_period_size = snd_pcm_plug_client_size(substream, 239 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 240 min_period_size *= oss_frame_size; 241 min_period_size = 1 << (ld2(min_period_size - 1) + 1); 242 if (oss_period_size < min_period_size) 243 oss_period_size = min_period_size; 244 245 max_period_size = snd_pcm_plug_client_size(substream, 246 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 247 max_period_size *= oss_frame_size; 248 max_period_size = 1 << ld2(max_period_size); 249 if (oss_period_size > max_period_size) 250 oss_period_size = max_period_size; 251 252 oss_periods = oss_buffer_size / oss_period_size; 253 254 if (substream->oss.setup.periods > 1) 255 oss_periods = substream->oss.setup.periods; 256 257 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 258 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 259 s = runtime->oss.maxfrags; 260 if (oss_periods > s) 261 oss_periods = s; 262 263 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 264 if (s < 2) 265 s = 2; 266 if (oss_periods < s) 267 oss_periods = s; 268 269 while (oss_period_size * oss_periods > oss_buffer_size) 270 oss_period_size /= 2; 271 272 snd_assert(oss_period_size >= 16, return -EINVAL); 273 runtime->oss.period_bytes = oss_period_size; 274 runtime->oss.period_frames = 1; 275 runtime->oss.periods = oss_periods; 276 return 0; 277 } 278 279 static int choose_rate(struct snd_pcm_substream *substream, 280 struct snd_pcm_hw_params *params, unsigned int best_rate) 281 { 282 struct snd_interval *it; 283 struct snd_pcm_hw_params *save; 284 unsigned int rate, prev; 285 286 save = kmalloc(sizeof(*save), GFP_KERNEL); 287 if (save == NULL) 288 return -ENOMEM; 289 *save = *params; 290 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 291 292 /* try multiples of the best rate */ 293 rate = best_rate; 294 for (;;) { 295 if (it->max < rate || (it->max == rate && it->openmax)) 296 break; 297 if (it->min < rate || (it->min == rate && !it->openmin)) { 298 int ret; 299 ret = snd_pcm_hw_param_set(substream, params, 300 SNDRV_PCM_HW_PARAM_RATE, 301 rate, 0); 302 if (ret == (int)rate) { 303 kfree(save); 304 return rate; 305 } 306 *params = *save; 307 } 308 prev = rate; 309 rate += best_rate; 310 if (rate <= prev) 311 break; 312 } 313 314 /* not found, use the nearest rate */ 315 kfree(save); 316 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 317 } 318 319 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 320 { 321 struct snd_pcm_runtime *runtime = substream->runtime; 322 struct snd_pcm_hw_params *params, *sparams; 323 struct snd_pcm_sw_params *sw_params; 324 ssize_t oss_buffer_size, oss_period_size; 325 size_t oss_frame_size; 326 int err; 327 int direct; 328 int format, sformat, n; 329 struct snd_mask sformat_mask; 330 struct snd_mask mask; 331 332 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 333 params = kmalloc(sizeof(*params), GFP_KERNEL); 334 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 335 if (!sw_params || !params || !sparams) { 336 snd_printd("No memory\n"); 337 err = -ENOMEM; 338 goto failure; 339 } 340 341 if (atomic_read(&runtime->mmap_count)) 342 direct = 1; 343 else 344 direct = substream->oss.setup.direct; 345 346 _snd_pcm_hw_params_any(sparams); 347 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 348 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 349 snd_mask_none(&mask); 350 if (atomic_read(&runtime->mmap_count)) 351 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 352 else { 353 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); 354 if (!direct) 355 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 356 } 357 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 358 if (err < 0) { 359 snd_printd("No usable accesses\n"); 360 err = -EINVAL; 361 goto failure; 362 } 363 choose_rate(substream, sparams, runtime->oss.rate); 364 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 365 366 format = snd_pcm_oss_format_from(runtime->oss.format); 367 368 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 369 if (direct) 370 sformat = format; 371 else 372 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 373 374 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { 375 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { 376 if (snd_mask_test(&sformat_mask, sformat) && 377 snd_pcm_oss_format_to(sformat) >= 0) 378 break; 379 } 380 if (sformat > SNDRV_PCM_FORMAT_LAST) { 381 snd_printd("Cannot find a format!!!\n"); 382 err = -EINVAL; 383 goto failure; 384 } 385 } 386 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); 387 snd_assert(err >= 0, goto failure); 388 389 if (direct) { 390 memcpy(params, sparams, sizeof(*params)); 391 } else { 392 _snd_pcm_hw_params_any(params); 393 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 394 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 395 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 396 snd_pcm_oss_format_from(runtime->oss.format), 0); 397 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 398 runtime->oss.channels, 0); 399 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 400 runtime->oss.rate, 0); 401 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 402 params_access(params), params_format(params), 403 params_channels(params), params_rate(params)); 404 } 405 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 406 params_access(sparams), params_format(sparams), 407 params_channels(sparams), params_rate(sparams)); 408 409 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 410 params_channels(params) / 8; 411 412 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 413 snd_pcm_oss_plugin_clear(substream); 414 if (!direct) { 415 /* add necessary plugins */ 416 snd_pcm_oss_plugin_clear(substream); 417 if ((err = snd_pcm_plug_format_plugins(substream, 418 params, 419 sparams)) < 0) { 420 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); 421 snd_pcm_oss_plugin_clear(substream); 422 goto failure; 423 } 424 if (runtime->oss.plugin_first) { 425 struct snd_pcm_plugin *plugin; 426 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 427 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 428 snd_pcm_oss_plugin_clear(substream); 429 goto failure; 430 } 431 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 432 err = snd_pcm_plugin_append(plugin); 433 } else { 434 err = snd_pcm_plugin_insert(plugin); 435 } 436 if (err < 0) { 437 snd_pcm_oss_plugin_clear(substream); 438 goto failure; 439 } 440 } 441 } 442 #endif 443 444 err = snd_pcm_oss_period_size(substream, params, sparams); 445 if (err < 0) 446 goto failure; 447 448 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 449 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 450 snd_assert(err >= 0, goto failure); 451 452 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 453 runtime->oss.periods, NULL); 454 snd_assert(err >= 0, goto failure); 455 456 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 457 458 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 459 snd_printd("HW_PARAMS failed: %i\n", err); 460 goto failure; 461 } 462 463 memset(sw_params, 0, sizeof(*sw_params)); 464 if (runtime->oss.trigger) { 465 sw_params->start_threshold = 1; 466 } else { 467 sw_params->start_threshold = runtime->boundary; 468 } 469 if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE) 470 sw_params->stop_threshold = runtime->boundary; 471 else 472 sw_params->stop_threshold = runtime->buffer_size; 473 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 474 sw_params->period_step = 1; 475 sw_params->sleep_min = 0; 476 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 477 1 : runtime->period_size; 478 sw_params->xfer_align = 1; 479 if (atomic_read(&runtime->mmap_count) || 480 substream->oss.setup.nosilence) { 481 sw_params->silence_threshold = 0; 482 sw_params->silence_size = 0; 483 } else { 484 snd_pcm_uframes_t frames; 485 frames = runtime->period_size + 16; 486 if (frames > runtime->buffer_size) 487 frames = runtime->buffer_size; 488 sw_params->silence_threshold = frames; 489 sw_params->silence_size = frames; 490 } 491 492 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 493 snd_printd("SW_PARAMS failed: %i\n", err); 494 goto failure; 495 } 496 497 runtime->oss.periods = params_periods(sparams); 498 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 499 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure); 500 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 501 if (runtime->oss.plugin_first) { 502 err = snd_pcm_plug_alloc(substream, oss_period_size); 503 if (err < 0) 504 goto failure; 505 } 506 #endif 507 oss_period_size *= oss_frame_size; 508 509 oss_buffer_size = oss_period_size * runtime->oss.periods; 510 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure); 511 512 runtime->oss.period_bytes = oss_period_size; 513 runtime->oss.buffer_bytes = oss_buffer_size; 514 515 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 516 runtime->oss.period_bytes, 517 runtime->oss.buffer_bytes); 518 pdprintf("slave: period_size = %i, buffer_size = %i\n", 519 params_period_size(sparams), 520 params_buffer_size(sparams)); 521 522 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 523 runtime->oss.channels = params_channels(params); 524 runtime->oss.rate = params_rate(params); 525 526 runtime->oss.params = 0; 527 runtime->oss.prepare = 1; 528 vfree(runtime->oss.buffer); 529 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 530 runtime->oss.buffer_used = 0; 531 if (runtime->dma_area) 532 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 533 534 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 535 536 err = 0; 537 failure: 538 kfree(sw_params); 539 kfree(params); 540 kfree(sparams); 541 return err; 542 } 543 544 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 545 { 546 int idx, err; 547 struct snd_pcm_substream *asubstream = NULL, *substream; 548 549 for (idx = 0; idx < 2; idx++) { 550 substream = pcm_oss_file->streams[idx]; 551 if (substream == NULL) 552 continue; 553 if (asubstream == NULL) 554 asubstream = substream; 555 if (substream->runtime->oss.params) { 556 err = snd_pcm_oss_change_params(substream); 557 if (err < 0) 558 return err; 559 } 560 } 561 snd_assert(asubstream != NULL, return -EIO); 562 if (r_substream) 563 *r_substream = asubstream; 564 return 0; 565 } 566 567 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 568 { 569 int err; 570 struct snd_pcm_runtime *runtime = substream->runtime; 571 572 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 573 if (err < 0) { 574 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 575 return err; 576 } 577 runtime->oss.prepare = 0; 578 runtime->oss.prev_hw_ptr_interrupt = 0; 579 runtime->oss.period_ptr = 0; 580 runtime->oss.buffer_used = 0; 581 582 return 0; 583 } 584 585 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 586 { 587 struct snd_pcm_runtime *runtime; 588 int err; 589 590 if (substream == NULL) 591 return 0; 592 runtime = substream->runtime; 593 if (runtime->oss.params) { 594 err = snd_pcm_oss_change_params(substream); 595 if (err < 0) 596 return err; 597 } 598 if (runtime->oss.prepare) { 599 err = snd_pcm_oss_prepare(substream); 600 if (err < 0) 601 return err; 602 } 603 return 0; 604 } 605 606 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 607 { 608 struct snd_pcm_runtime *runtime; 609 snd_pcm_uframes_t frames; 610 int err = 0; 611 612 while (1) { 613 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 614 if (err < 0) 615 break; 616 runtime = substream->runtime; 617 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 618 break; 619 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 620 /* until avail(delay) <= buffer_size */ 621 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 622 frames /= runtime->period_size; 623 frames *= runtime->period_size; 624 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 625 if (err < 0) 626 break; 627 } 628 return err; 629 } 630 631 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 632 { 633 struct snd_pcm_runtime *runtime = substream->runtime; 634 int ret; 635 while (1) { 636 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 637 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 638 #ifdef OSS_DEBUG 639 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 640 printk("pcm_oss: write: recovering from XRUN\n"); 641 else 642 printk("pcm_oss: write: recovering from SUSPEND\n"); 643 #endif 644 ret = snd_pcm_oss_prepare(substream); 645 if (ret < 0) 646 break; 647 } 648 if (in_kernel) { 649 mm_segment_t fs; 650 fs = snd_enter_user(); 651 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 652 snd_leave_user(fs); 653 } else { 654 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 655 } 656 if (ret != -EPIPE && ret != -ESTRPIPE) 657 break; 658 /* test, if we can't store new data, because the stream */ 659 /* has not been started */ 660 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 661 return -EAGAIN; 662 } 663 return ret; 664 } 665 666 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 667 { 668 struct snd_pcm_runtime *runtime = substream->runtime; 669 snd_pcm_sframes_t delay; 670 int ret; 671 while (1) { 672 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 673 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 674 #ifdef OSS_DEBUG 675 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 676 printk("pcm_oss: read: recovering from XRUN\n"); 677 else 678 printk("pcm_oss: read: recovering from SUSPEND\n"); 679 #endif 680 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 681 if (ret < 0) 682 break; 683 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 684 ret = snd_pcm_oss_prepare(substream); 685 if (ret < 0) 686 break; 687 } 688 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 689 if (ret < 0) 690 break; 691 if (in_kernel) { 692 mm_segment_t fs; 693 fs = snd_enter_user(); 694 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 695 snd_leave_user(fs); 696 } else { 697 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 698 } 699 if (ret == -EPIPE) { 700 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 701 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 702 if (ret < 0) 703 break; 704 } 705 continue; 706 } 707 if (ret != -ESTRPIPE) 708 break; 709 } 710 return ret; 711 } 712 713 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 714 { 715 struct snd_pcm_runtime *runtime = substream->runtime; 716 int ret; 717 while (1) { 718 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 719 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 720 #ifdef OSS_DEBUG 721 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 722 printk("pcm_oss: writev: recovering from XRUN\n"); 723 else 724 printk("pcm_oss: writev: recovering from SUSPEND\n"); 725 #endif 726 ret = snd_pcm_oss_prepare(substream); 727 if (ret < 0) 728 break; 729 } 730 if (in_kernel) { 731 mm_segment_t fs; 732 fs = snd_enter_user(); 733 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 734 snd_leave_user(fs); 735 } else { 736 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 737 } 738 if (ret != -EPIPE && ret != -ESTRPIPE) 739 break; 740 741 /* test, if we can't store new data, because the stream */ 742 /* has not been started */ 743 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 744 return -EAGAIN; 745 } 746 return ret; 747 } 748 749 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 750 { 751 struct snd_pcm_runtime *runtime = substream->runtime; 752 int ret; 753 while (1) { 754 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 755 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 756 #ifdef OSS_DEBUG 757 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 758 printk("pcm_oss: readv: recovering from XRUN\n"); 759 else 760 printk("pcm_oss: readv: recovering from SUSPEND\n"); 761 #endif 762 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 763 if (ret < 0) 764 break; 765 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 766 ret = snd_pcm_oss_prepare(substream); 767 if (ret < 0) 768 break; 769 } 770 if (in_kernel) { 771 mm_segment_t fs; 772 fs = snd_enter_user(); 773 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 774 snd_leave_user(fs); 775 } else { 776 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 777 } 778 if (ret != -EPIPE && ret != -ESTRPIPE) 779 break; 780 } 781 return ret; 782 } 783 784 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 785 { 786 struct snd_pcm_runtime *runtime = substream->runtime; 787 snd_pcm_sframes_t frames, frames1; 788 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 789 if (runtime->oss.plugin_first) { 790 struct snd_pcm_plugin_channel *channels; 791 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 792 if (!in_kernel) { 793 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) 794 return -EFAULT; 795 buf = runtime->oss.buffer; 796 } 797 frames = bytes / oss_frame_bytes; 798 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 799 if (frames1 < 0) 800 return frames1; 801 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 802 if (frames1 <= 0) 803 return frames1; 804 bytes = frames1 * oss_frame_bytes; 805 } else 806 #endif 807 { 808 frames = bytes_to_frames(runtime, bytes); 809 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 810 if (frames1 <= 0) 811 return frames1; 812 bytes = frames_to_bytes(runtime, frames1); 813 } 814 return bytes; 815 } 816 817 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 818 { 819 size_t xfer = 0; 820 ssize_t tmp; 821 struct snd_pcm_runtime *runtime = substream->runtime; 822 823 if (atomic_read(&runtime->mmap_count)) 824 return -ENXIO; 825 826 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 827 return tmp; 828 while (bytes > 0) { 829 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 830 tmp = bytes; 831 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 832 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 833 if (tmp > 0) { 834 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) 835 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT; 836 } 837 runtime->oss.buffer_used += tmp; 838 buf += tmp; 839 bytes -= tmp; 840 xfer += tmp; 841 if (substream->oss.setup.partialfrag || 842 runtime->oss.buffer_used == runtime->oss.period_bytes) { 843 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 844 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 845 if (tmp <= 0) 846 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 847 runtime->oss.bytes += tmp; 848 runtime->oss.period_ptr += tmp; 849 runtime->oss.period_ptr %= runtime->oss.period_bytes; 850 if (runtime->oss.period_ptr == 0 || 851 runtime->oss.period_ptr == runtime->oss.buffer_used) 852 runtime->oss.buffer_used = 0; 853 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0) 854 return xfer > 0 ? xfer : -EAGAIN; 855 } 856 } else { 857 tmp = snd_pcm_oss_write2(substream, 858 (const char __force *)buf, 859 runtime->oss.period_bytes, 0); 860 if (tmp <= 0) 861 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 862 runtime->oss.bytes += tmp; 863 buf += tmp; 864 bytes -= tmp; 865 xfer += tmp; 866 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 && 867 tmp != runtime->oss.period_bytes) 868 break; 869 } 870 } 871 return xfer; 872 } 873 874 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 875 { 876 struct snd_pcm_runtime *runtime = substream->runtime; 877 snd_pcm_sframes_t frames, frames1; 878 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 879 char __user *final_dst = (char __user *)buf; 880 if (runtime->oss.plugin_first) { 881 struct snd_pcm_plugin_channel *channels; 882 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 883 if (!in_kernel) 884 buf = runtime->oss.buffer; 885 frames = bytes / oss_frame_bytes; 886 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 887 if (frames1 < 0) 888 return frames1; 889 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 890 if (frames1 <= 0) 891 return frames1; 892 bytes = frames1 * oss_frame_bytes; 893 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 894 return -EFAULT; 895 } else 896 #endif 897 { 898 frames = bytes_to_frames(runtime, bytes); 899 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 900 if (frames1 <= 0) 901 return frames1; 902 bytes = frames_to_bytes(runtime, frames1); 903 } 904 return bytes; 905 } 906 907 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 908 { 909 size_t xfer = 0; 910 ssize_t tmp; 911 struct snd_pcm_runtime *runtime = substream->runtime; 912 913 if (atomic_read(&runtime->mmap_count)) 914 return -ENXIO; 915 916 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 917 return tmp; 918 while (bytes > 0) { 919 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 920 if (runtime->oss.buffer_used == 0) { 921 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 922 if (tmp <= 0) 923 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 924 runtime->oss.bytes += tmp; 925 runtime->oss.period_ptr = tmp; 926 runtime->oss.buffer_used = tmp; 927 } 928 tmp = bytes; 929 if ((size_t) tmp > runtime->oss.buffer_used) 930 tmp = runtime->oss.buffer_used; 931 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) 932 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT; 933 buf += tmp; 934 bytes -= tmp; 935 xfer += tmp; 936 runtime->oss.buffer_used -= tmp; 937 } else { 938 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 939 runtime->oss.period_bytes, 0); 940 if (tmp <= 0) 941 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 942 runtime->oss.bytes += tmp; 943 buf += tmp; 944 bytes -= tmp; 945 xfer += tmp; 946 } 947 } 948 return xfer; 949 } 950 951 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 952 { 953 struct snd_pcm_substream *substream; 954 955 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 956 if (substream != NULL) { 957 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 958 substream->runtime->oss.prepare = 1; 959 } 960 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 961 if (substream != NULL) { 962 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 963 substream->runtime->oss.prepare = 1; 964 } 965 return 0; 966 } 967 968 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 969 { 970 struct snd_pcm_substream *substream; 971 int err; 972 973 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 974 if (substream != NULL) { 975 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 976 return err; 977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 978 } 979 /* note: all errors from the start action are ignored */ 980 /* OSS apps do not know, how to handle them */ 981 return 0; 982 } 983 984 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 985 { 986 struct snd_pcm_runtime *runtime; 987 ssize_t result = 0; 988 long res; 989 wait_queue_t wait; 990 991 runtime = substream->runtime; 992 init_waitqueue_entry(&wait, current); 993 add_wait_queue(&runtime->sleep, &wait); 994 #ifdef OSS_DEBUG 995 printk("sync1: size = %li\n", size); 996 #endif 997 while (1) { 998 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 999 if (result > 0) { 1000 runtime->oss.buffer_used = 0; 1001 result = 0; 1002 break; 1003 } 1004 if (result != 0 && result != -EAGAIN) 1005 break; 1006 result = 0; 1007 set_current_state(TASK_INTERRUPTIBLE); 1008 snd_pcm_stream_lock_irq(substream); 1009 res = runtime->status->state; 1010 snd_pcm_stream_unlock_irq(substream); 1011 if (res != SNDRV_PCM_STATE_RUNNING) { 1012 set_current_state(TASK_RUNNING); 1013 break; 1014 } 1015 res = schedule_timeout(10 * HZ); 1016 if (signal_pending(current)) { 1017 result = -ERESTARTSYS; 1018 break; 1019 } 1020 if (res == 0) { 1021 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1022 result = -EIO; 1023 break; 1024 } 1025 } 1026 remove_wait_queue(&runtime->sleep, &wait); 1027 return result; 1028 } 1029 1030 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1031 { 1032 int err = 0; 1033 unsigned int saved_f_flags; 1034 struct snd_pcm_substream *substream; 1035 struct snd_pcm_runtime *runtime; 1036 snd_pcm_format_t format; 1037 unsigned long width; 1038 size_t size; 1039 1040 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1041 if (substream != NULL) { 1042 runtime = substream->runtime; 1043 if (atomic_read(&runtime->mmap_count)) 1044 goto __direct; 1045 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1046 return err; 1047 format = snd_pcm_oss_format_from(runtime->oss.format); 1048 width = snd_pcm_format_physical_width(format); 1049 if (runtime->oss.buffer_used > 0) { 1050 #ifdef OSS_DEBUG 1051 printk("sync: buffer_used\n"); 1052 #endif 1053 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1054 snd_pcm_format_set_silence(format, 1055 runtime->oss.buffer + runtime->oss.buffer_used, 1056 size); 1057 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1058 if (err < 0) 1059 return err; 1060 } else if (runtime->oss.period_ptr > 0) { 1061 #ifdef OSS_DEBUG 1062 printk("sync: period_ptr\n"); 1063 #endif 1064 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1065 snd_pcm_format_set_silence(format, 1066 runtime->oss.buffer, 1067 size * 8 / width); 1068 err = snd_pcm_oss_sync1(substream, size); 1069 if (err < 0) 1070 return err; 1071 } 1072 /* 1073 * The ALSA's period might be a bit large than OSS one. 1074 * Fill the remain portion of ALSA period with zeros. 1075 */ 1076 size = runtime->control->appl_ptr % runtime->period_size; 1077 if (size > 0) { 1078 size = runtime->period_size - size; 1079 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1080 size = (runtime->frame_bits * size) / 8; 1081 while (size > 0) { 1082 mm_segment_t fs; 1083 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1084 size -= size1; 1085 size1 *= 8; 1086 size1 /= runtime->sample_bits; 1087 snd_pcm_format_set_silence(runtime->format, 1088 runtime->oss.buffer, 1089 size1); 1090 fs = snd_enter_user(); 1091 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1092 snd_leave_user(fs); 1093 } 1094 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1095 void __user *buffers[runtime->channels]; 1096 memset(buffers, 0, runtime->channels * sizeof(void *)); 1097 snd_pcm_lib_writev(substream, buffers, size); 1098 } 1099 } 1100 /* 1101 * finish sync: drain the buffer 1102 */ 1103 __direct: 1104 saved_f_flags = substream->ffile->f_flags; 1105 substream->ffile->f_flags &= ~O_NONBLOCK; 1106 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1107 substream->ffile->f_flags = saved_f_flags; 1108 if (err < 0) 1109 return err; 1110 runtime->oss.prepare = 1; 1111 } 1112 1113 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1114 if (substream != NULL) { 1115 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1116 return err; 1117 runtime = substream->runtime; 1118 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1119 if (err < 0) 1120 return err; 1121 runtime->oss.buffer_used = 0; 1122 runtime->oss.prepare = 1; 1123 } 1124 return 0; 1125 } 1126 1127 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1128 { 1129 int idx; 1130 1131 for (idx = 1; idx >= 0; --idx) { 1132 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1133 struct snd_pcm_runtime *runtime; 1134 if (substream == NULL) 1135 continue; 1136 runtime = substream->runtime; 1137 if (rate < 1000) 1138 rate = 1000; 1139 else if (rate > 192000) 1140 rate = 192000; 1141 if (runtime->oss.rate != rate) { 1142 runtime->oss.params = 1; 1143 runtime->oss.rate = rate; 1144 } 1145 } 1146 return snd_pcm_oss_get_rate(pcm_oss_file); 1147 } 1148 1149 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1150 { 1151 struct snd_pcm_substream *substream; 1152 int err; 1153 1154 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1155 return err; 1156 return substream->runtime->oss.rate; 1157 } 1158 1159 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1160 { 1161 int idx; 1162 if (channels < 1) 1163 channels = 1; 1164 if (channels > 128) 1165 return -EINVAL; 1166 for (idx = 1; idx >= 0; --idx) { 1167 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1168 struct snd_pcm_runtime *runtime; 1169 if (substream == NULL) 1170 continue; 1171 runtime = substream->runtime; 1172 if (runtime->oss.channels != channels) { 1173 runtime->oss.params = 1; 1174 runtime->oss.channels = channels; 1175 } 1176 } 1177 return snd_pcm_oss_get_channels(pcm_oss_file); 1178 } 1179 1180 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1181 { 1182 struct snd_pcm_substream *substream; 1183 int err; 1184 1185 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1186 return err; 1187 return substream->runtime->oss.channels; 1188 } 1189 1190 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1191 { 1192 struct snd_pcm_substream *substream; 1193 int err; 1194 1195 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1196 return err; 1197 return substream->runtime->oss.period_bytes; 1198 } 1199 1200 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1201 { 1202 struct snd_pcm_substream *substream; 1203 int err; 1204 int direct; 1205 struct snd_pcm_hw_params *params; 1206 unsigned int formats = 0; 1207 struct snd_mask format_mask; 1208 int fmt; 1209 1210 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1211 return err; 1212 if (atomic_read(&substream->runtime->mmap_count)) 1213 direct = 1; 1214 else 1215 direct = substream->oss.setup.direct; 1216 if (!direct) 1217 return AFMT_MU_LAW | AFMT_U8 | 1218 AFMT_S16_LE | AFMT_S16_BE | 1219 AFMT_S8 | AFMT_U16_LE | 1220 AFMT_U16_BE; 1221 params = kmalloc(sizeof(*params), GFP_KERNEL); 1222 if (!params) 1223 return -ENOMEM; 1224 _snd_pcm_hw_params_any(params); 1225 err = snd_pcm_hw_refine(substream, params); 1226 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1227 kfree(params); 1228 snd_assert(err >= 0, return err); 1229 for (fmt = 0; fmt < 32; ++fmt) { 1230 if (snd_mask_test(&format_mask, fmt)) { 1231 int f = snd_pcm_oss_format_to(fmt); 1232 if (f >= 0) 1233 formats |= f; 1234 } 1235 } 1236 return formats; 1237 } 1238 1239 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1240 { 1241 int formats, idx; 1242 1243 if (format != AFMT_QUERY) { 1244 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1245 if (!(formats & format)) 1246 format = AFMT_U8; 1247 for (idx = 1; idx >= 0; --idx) { 1248 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1249 struct snd_pcm_runtime *runtime; 1250 if (substream == NULL) 1251 continue; 1252 runtime = substream->runtime; 1253 if (runtime->oss.format != format) { 1254 runtime->oss.params = 1; 1255 runtime->oss.format = format; 1256 } 1257 } 1258 } 1259 return snd_pcm_oss_get_format(pcm_oss_file); 1260 } 1261 1262 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1263 { 1264 struct snd_pcm_substream *substream; 1265 int err; 1266 1267 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1268 return err; 1269 return substream->runtime->oss.format; 1270 } 1271 1272 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1273 { 1274 struct snd_pcm_runtime *runtime; 1275 1276 if (substream == NULL) 1277 return 0; 1278 runtime = substream->runtime; 1279 if (subdivide == 0) { 1280 subdivide = runtime->oss.subdivision; 1281 if (subdivide == 0) 1282 subdivide = 1; 1283 return subdivide; 1284 } 1285 if (runtime->oss.subdivision || runtime->oss.fragshift) 1286 return -EINVAL; 1287 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1288 subdivide != 8 && subdivide != 16) 1289 return -EINVAL; 1290 runtime->oss.subdivision = subdivide; 1291 runtime->oss.params = 1; 1292 return subdivide; 1293 } 1294 1295 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1296 { 1297 int err = -EINVAL, idx; 1298 1299 for (idx = 1; idx >= 0; --idx) { 1300 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1301 if (substream == NULL) 1302 continue; 1303 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1304 return err; 1305 } 1306 return err; 1307 } 1308 1309 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1310 { 1311 struct snd_pcm_runtime *runtime; 1312 1313 if (substream == NULL) 1314 return 0; 1315 runtime = substream->runtime; 1316 if (runtime->oss.subdivision || runtime->oss.fragshift) 1317 return -EINVAL; 1318 runtime->oss.fragshift = val & 0xffff; 1319 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1320 if (runtime->oss.fragshift < 4) /* < 16 */ 1321 runtime->oss.fragshift = 4; 1322 if (runtime->oss.maxfrags < 2) 1323 runtime->oss.maxfrags = 2; 1324 runtime->oss.params = 1; 1325 return 0; 1326 } 1327 1328 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1329 { 1330 int err = -EINVAL, idx; 1331 1332 for (idx = 1; idx >= 0; --idx) { 1333 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1334 if (substream == NULL) 1335 continue; 1336 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1337 return err; 1338 } 1339 return err; 1340 } 1341 1342 static int snd_pcm_oss_nonblock(struct file * file) 1343 { 1344 file->f_flags |= O_NONBLOCK; 1345 return 0; 1346 } 1347 1348 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1349 { 1350 1351 if (substream == NULL) { 1352 res &= ~DSP_CAP_DUPLEX; 1353 return res; 1354 } 1355 #ifdef DSP_CAP_MULTI 1356 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1357 if (substream->pstr->substream_count > 1) 1358 res |= DSP_CAP_MULTI; 1359 #endif 1360 /* DSP_CAP_REALTIME is set all times: */ 1361 /* all ALSA drivers can return actual pointer in ring buffer */ 1362 #if defined(DSP_CAP_REALTIME) && 0 1363 { 1364 struct snd_pcm_runtime *runtime = substream->runtime; 1365 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1366 res &= ~DSP_CAP_REALTIME; 1367 } 1368 #endif 1369 return res; 1370 } 1371 1372 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1373 { 1374 int result, idx; 1375 1376 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1377 for (idx = 0; idx < 2; idx++) { 1378 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1379 result = snd_pcm_oss_get_caps1(substream, result); 1380 } 1381 result |= 0x0001; /* revision - same as SB AWE 64 */ 1382 return result; 1383 } 1384 1385 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr) 1386 { 1387 struct snd_pcm_runtime *runtime = substream->runtime; 1388 snd_pcm_uframes_t appl_ptr; 1389 appl_ptr = hw_ptr + runtime->buffer_size; 1390 appl_ptr %= runtime->boundary; 1391 runtime->control->appl_ptr = appl_ptr; 1392 } 1393 1394 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1395 { 1396 struct snd_pcm_runtime *runtime; 1397 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1398 int err, cmd; 1399 1400 #ifdef OSS_DEBUG 1401 printk("pcm_oss: trigger = 0x%x\n", trigger); 1402 #endif 1403 1404 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1405 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1406 1407 if (psubstream) { 1408 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1409 return err; 1410 } 1411 if (csubstream) { 1412 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1413 return err; 1414 } 1415 if (psubstream) { 1416 runtime = psubstream->runtime; 1417 if (trigger & PCM_ENABLE_OUTPUT) { 1418 if (runtime->oss.trigger) 1419 goto _skip1; 1420 if (atomic_read(&psubstream->runtime->mmap_count)) 1421 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); 1422 runtime->oss.trigger = 1; 1423 runtime->start_threshold = 1; 1424 cmd = SNDRV_PCM_IOCTL_START; 1425 } else { 1426 if (!runtime->oss.trigger) 1427 goto _skip1; 1428 runtime->oss.trigger = 0; 1429 runtime->start_threshold = runtime->boundary; 1430 cmd = SNDRV_PCM_IOCTL_DROP; 1431 runtime->oss.prepare = 1; 1432 } 1433 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 1434 if (err < 0) 1435 return err; 1436 } 1437 _skip1: 1438 if (csubstream) { 1439 runtime = csubstream->runtime; 1440 if (trigger & PCM_ENABLE_INPUT) { 1441 if (runtime->oss.trigger) 1442 goto _skip2; 1443 runtime->oss.trigger = 1; 1444 runtime->start_threshold = 1; 1445 cmd = SNDRV_PCM_IOCTL_START; 1446 } else { 1447 if (!runtime->oss.trigger) 1448 goto _skip2; 1449 runtime->oss.trigger = 0; 1450 runtime->start_threshold = runtime->boundary; 1451 cmd = SNDRV_PCM_IOCTL_DROP; 1452 runtime->oss.prepare = 1; 1453 } 1454 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 1455 if (err < 0) 1456 return err; 1457 } 1458 _skip2: 1459 return 0; 1460 } 1461 1462 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 1463 { 1464 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1465 int result = 0; 1466 1467 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1468 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1469 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 1470 result |= PCM_ENABLE_OUTPUT; 1471 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 1472 result |= PCM_ENABLE_INPUT; 1473 return result; 1474 } 1475 1476 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 1477 { 1478 struct snd_pcm_substream *substream; 1479 struct snd_pcm_runtime *runtime; 1480 snd_pcm_sframes_t delay; 1481 int err; 1482 1483 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1484 if (substream == NULL) 1485 return -EINVAL; 1486 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1487 return err; 1488 runtime = substream->runtime; 1489 if (runtime->oss.params || runtime->oss.prepare) 1490 return 0; 1491 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 1492 if (err == -EPIPE) 1493 delay = 0; /* hack for broken OSS applications */ 1494 else if (err < 0) 1495 return err; 1496 return snd_pcm_oss_bytes(substream, delay); 1497 } 1498 1499 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 1500 { 1501 struct snd_pcm_substream *substream; 1502 struct snd_pcm_runtime *runtime; 1503 snd_pcm_sframes_t delay; 1504 int fixup; 1505 struct count_info info; 1506 int err; 1507 1508 if (_info == NULL) 1509 return -EFAULT; 1510 substream = pcm_oss_file->streams[stream]; 1511 if (substream == NULL) 1512 return -EINVAL; 1513 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1514 return err; 1515 runtime = substream->runtime; 1516 if (runtime->oss.params || runtime->oss.prepare) { 1517 memset(&info, 0, sizeof(info)); 1518 if (copy_to_user(_info, &info, sizeof(info))) 1519 return -EFAULT; 1520 return 0; 1521 } 1522 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1523 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 1524 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 1525 err = 0; 1526 delay = 0; 1527 fixup = 0; 1528 } else { 1529 fixup = runtime->oss.buffer_used; 1530 } 1531 } else { 1532 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 1533 fixup = -runtime->oss.buffer_used; 1534 } 1535 if (err < 0) 1536 return err; 1537 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 1538 if (atomic_read(&runtime->mmap_count)) { 1539 snd_pcm_sframes_t n; 1540 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; 1541 if (n < 0) 1542 n += runtime->boundary; 1543 info.blocks = n / runtime->period_size; 1544 runtime->oss.prev_hw_ptr_interrupt = delay; 1545 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1546 snd_pcm_oss_simulate_fill(substream, delay); 1547 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 1548 } else { 1549 delay = snd_pcm_oss_bytes(substream, delay); 1550 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1551 if (substream->oss.setup.buggyptr) 1552 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 1553 else 1554 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 1555 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 1556 } else { 1557 delay += fixup; 1558 info.blocks = delay / runtime->oss.period_bytes; 1559 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 1560 } 1561 } 1562 if (copy_to_user(_info, &info, sizeof(info))) 1563 return -EFAULT; 1564 return 0; 1565 } 1566 1567 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 1568 { 1569 struct snd_pcm_substream *substream; 1570 struct snd_pcm_runtime *runtime; 1571 snd_pcm_sframes_t avail; 1572 int fixup; 1573 struct audio_buf_info info; 1574 int err; 1575 1576 if (_info == NULL) 1577 return -EFAULT; 1578 substream = pcm_oss_file->streams[stream]; 1579 if (substream == NULL) 1580 return -EINVAL; 1581 runtime = substream->runtime; 1582 1583 if (runtime->oss.params && 1584 (err = snd_pcm_oss_change_params(substream)) < 0) 1585 return err; 1586 1587 info.fragsize = runtime->oss.period_bytes; 1588 info.fragstotal = runtime->periods; 1589 if (runtime->oss.prepare) { 1590 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1591 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 1592 info.fragments = runtime->oss.periods; 1593 } else { 1594 info.bytes = 0; 1595 info.fragments = 0; 1596 } 1597 } else { 1598 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1599 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 1600 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 1601 avail = runtime->buffer_size; 1602 err = 0; 1603 fixup = 0; 1604 } else { 1605 avail = runtime->buffer_size - avail; 1606 fixup = -runtime->oss.buffer_used; 1607 } 1608 } else { 1609 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 1610 fixup = runtime->oss.buffer_used; 1611 } 1612 if (err < 0) 1613 return err; 1614 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 1615 info.fragments = info.bytes / runtime->oss.period_bytes; 1616 } 1617 1618 #ifdef OSS_DEBUG 1619 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); 1620 #endif 1621 if (copy_to_user(_info, &info, sizeof(info))) 1622 return -EFAULT; 1623 return 0; 1624 } 1625 1626 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 1627 { 1628 // it won't be probably implemented 1629 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 1630 return -EINVAL; 1631 } 1632 1633 static const char *strip_task_path(const char *path) 1634 { 1635 const char *ptr, *ptrl = NULL; 1636 for (ptr = path; *ptr; ptr++) { 1637 if (*ptr == '/') 1638 ptrl = ptr + 1; 1639 } 1640 return ptrl; 1641 } 1642 1643 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 1644 const char *task_name, 1645 struct snd_pcm_oss_setup *rsetup) 1646 { 1647 struct snd_pcm_oss_setup *setup; 1648 1649 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 1650 do { 1651 for (setup = pcm->streams[stream].oss.setup_list; setup; 1652 setup = setup->next) { 1653 if (!strcmp(setup->task_name, task_name)) 1654 goto out; 1655 } 1656 } while ((task_name = strip_task_path(task_name)) != NULL); 1657 out: 1658 if (setup) 1659 *rsetup = *setup; 1660 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 1661 } 1662 1663 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 1664 { 1665 struct snd_pcm_runtime *runtime; 1666 runtime = substream->runtime; 1667 vfree(runtime->oss.buffer); 1668 runtime->oss.buffer = NULL; 1669 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1670 snd_pcm_oss_plugin_clear(substream); 1671 #endif 1672 substream->oss.oss = 0; 1673 } 1674 1675 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 1676 struct snd_pcm_oss_setup *setup, 1677 int minor) 1678 { 1679 struct snd_pcm_runtime *runtime; 1680 1681 substream->oss.oss = 1; 1682 substream->oss.setup = *setup; 1683 if (setup->nonblock) 1684 substream->ffile->f_flags |= O_NONBLOCK; 1685 else 1686 substream->ffile->f_flags &= ~O_NONBLOCK; 1687 runtime = substream->runtime; 1688 runtime->oss.params = 1; 1689 runtime->oss.trigger = 1; 1690 runtime->oss.rate = 8000; 1691 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 1692 case SNDRV_MINOR_OSS_PCM_8: 1693 runtime->oss.format = AFMT_U8; 1694 break; 1695 case SNDRV_MINOR_OSS_PCM_16: 1696 runtime->oss.format = AFMT_S16_LE; 1697 break; 1698 default: 1699 runtime->oss.format = AFMT_MU_LAW; 1700 } 1701 runtime->oss.channels = 1; 1702 runtime->oss.fragshift = 0; 1703 runtime->oss.maxfrags = 0; 1704 runtime->oss.subdivision = 0; 1705 substream->pcm_release = snd_pcm_oss_release_substream; 1706 } 1707 1708 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 1709 { 1710 int cidx; 1711 snd_assert(pcm_oss_file != NULL, return -ENXIO); 1712 for (cidx = 0; cidx < 2; ++cidx) { 1713 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 1714 if (substream) 1715 snd_pcm_release_substream(substream); 1716 } 1717 kfree(pcm_oss_file); 1718 return 0; 1719 } 1720 1721 static int snd_pcm_oss_open_file(struct file *file, 1722 struct snd_pcm *pcm, 1723 struct snd_pcm_oss_file **rpcm_oss_file, 1724 int minor, 1725 struct snd_pcm_oss_setup *setup) 1726 { 1727 int idx, err; 1728 struct snd_pcm_oss_file *pcm_oss_file; 1729 struct snd_pcm_substream *substream; 1730 unsigned int f_mode = file->f_mode; 1731 1732 snd_assert(rpcm_oss_file != NULL, return -EINVAL); 1733 *rpcm_oss_file = NULL; 1734 1735 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 1736 if (pcm_oss_file == NULL) 1737 return -ENOMEM; 1738 1739 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 1740 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 1741 f_mode = FMODE_WRITE; 1742 1743 for (idx = 0; idx < 2; idx++) { 1744 if (setup[idx].disable) 1745 continue; 1746 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 1747 if (! (f_mode & FMODE_WRITE)) 1748 continue; 1749 } else { 1750 if (! (f_mode & FMODE_READ)) 1751 continue; 1752 } 1753 err = snd_pcm_open_substream(pcm, idx, file, &substream); 1754 if (err < 0) { 1755 snd_pcm_oss_release_file(pcm_oss_file); 1756 return err; 1757 } 1758 1759 pcm_oss_file->streams[idx] = substream; 1760 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 1761 } 1762 1763 if (! pcm_oss_file->streams[0] && pcm_oss_file->streams[1]) { 1764 snd_pcm_oss_release_file(pcm_oss_file); 1765 return -EINVAL; 1766 } 1767 1768 file->private_data = pcm_oss_file; 1769 *rpcm_oss_file = pcm_oss_file; 1770 return 0; 1771 } 1772 1773 1774 static int snd_task_name(struct task_struct *task, char *name, size_t size) 1775 { 1776 unsigned int idx; 1777 1778 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL); 1779 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 1780 name[idx] = task->comm[idx]; 1781 name[idx] = '\0'; 1782 return 0; 1783 } 1784 1785 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 1786 { 1787 int err; 1788 char task_name[32]; 1789 struct snd_pcm *pcm; 1790 struct snd_pcm_oss_file *pcm_oss_file; 1791 struct snd_pcm_oss_setup setup[2]; 1792 int nonblock; 1793 wait_queue_t wait; 1794 1795 pcm = snd_lookup_oss_minor_data(iminor(inode), 1796 SNDRV_OSS_DEVICE_TYPE_PCM); 1797 if (pcm == NULL) { 1798 err = -ENODEV; 1799 goto __error1; 1800 } 1801 err = snd_card_file_add(pcm->card, file); 1802 if (err < 0) 1803 goto __error1; 1804 if (!try_module_get(pcm->card->module)) { 1805 err = -EFAULT; 1806 goto __error2; 1807 } 1808 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 1809 err = -EFAULT; 1810 goto __error; 1811 } 1812 memset(setup, 0, sizeof(*setup)); 1813 if (file->f_mode & FMODE_WRITE) 1814 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 1815 task_name, &setup[0]); 1816 if (file->f_mode & FMODE_READ) 1817 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 1818 task_name, &setup[1]); 1819 1820 nonblock = !!(file->f_flags & O_NONBLOCK); 1821 if (!nonblock) 1822 nonblock = nonblock_open; 1823 1824 init_waitqueue_entry(&wait, current); 1825 add_wait_queue(&pcm->open_wait, &wait); 1826 mutex_lock(&pcm->open_mutex); 1827 while (1) { 1828 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 1829 iminor(inode), setup); 1830 if (err >= 0) 1831 break; 1832 if (err == -EAGAIN) { 1833 if (nonblock) { 1834 err = -EBUSY; 1835 break; 1836 } 1837 } else 1838 break; 1839 set_current_state(TASK_INTERRUPTIBLE); 1840 mutex_unlock(&pcm->open_mutex); 1841 schedule(); 1842 mutex_lock(&pcm->open_mutex); 1843 if (signal_pending(current)) { 1844 err = -ERESTARTSYS; 1845 break; 1846 } 1847 } 1848 remove_wait_queue(&pcm->open_wait, &wait); 1849 mutex_unlock(&pcm->open_mutex); 1850 if (err < 0) 1851 goto __error; 1852 return err; 1853 1854 __error: 1855 module_put(pcm->card->module); 1856 __error2: 1857 snd_card_file_remove(pcm->card, file); 1858 __error1: 1859 return err; 1860 } 1861 1862 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 1863 { 1864 struct snd_pcm *pcm; 1865 struct snd_pcm_substream *substream; 1866 struct snd_pcm_oss_file *pcm_oss_file; 1867 1868 pcm_oss_file = file->private_data; 1869 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1870 if (substream == NULL) 1871 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1872 snd_assert(substream != NULL, return -ENXIO); 1873 pcm = substream->pcm; 1874 snd_pcm_oss_sync(pcm_oss_file); 1875 mutex_lock(&pcm->open_mutex); 1876 snd_pcm_oss_release_file(pcm_oss_file); 1877 mutex_unlock(&pcm->open_mutex); 1878 wake_up(&pcm->open_wait); 1879 module_put(pcm->card->module); 1880 snd_card_file_remove(pcm->card, file); 1881 return 0; 1882 } 1883 1884 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1885 { 1886 struct snd_pcm_oss_file *pcm_oss_file; 1887 int __user *p = (int __user *)arg; 1888 int res; 1889 1890 pcm_oss_file = file->private_data; 1891 if (cmd == OSS_GETVERSION) 1892 return put_user(SNDRV_OSS_VERSION, p); 1893 if (cmd == OSS_ALSAEMULVER) 1894 return put_user(1, p); 1895 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 1896 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 1897 struct snd_pcm_substream *substream; 1898 int idx; 1899 for (idx = 0; idx < 2; ++idx) { 1900 substream = pcm_oss_file->streams[idx]; 1901 if (substream != NULL) 1902 break; 1903 } 1904 snd_assert(substream != NULL, return -ENXIO); 1905 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 1906 } 1907 #endif 1908 if (((cmd >> 8) & 0xff) != 'P') 1909 return -EINVAL; 1910 #ifdef OSS_DEBUG 1911 printk("pcm_oss: ioctl = 0x%x\n", cmd); 1912 #endif 1913 switch (cmd) { 1914 case SNDCTL_DSP_RESET: 1915 return snd_pcm_oss_reset(pcm_oss_file); 1916 case SNDCTL_DSP_SYNC: 1917 return snd_pcm_oss_sync(pcm_oss_file); 1918 case SNDCTL_DSP_SPEED: 1919 if (get_user(res, p)) 1920 return -EFAULT; 1921 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 1922 return res; 1923 return put_user(res, p); 1924 case SOUND_PCM_READ_RATE: 1925 res = snd_pcm_oss_get_rate(pcm_oss_file); 1926 if (res < 0) 1927 return res; 1928 return put_user(res, p); 1929 case SNDCTL_DSP_STEREO: 1930 if (get_user(res, p)) 1931 return -EFAULT; 1932 res = res > 0 ? 2 : 1; 1933 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 1934 return res; 1935 return put_user(--res, p); 1936 case SNDCTL_DSP_GETBLKSIZE: 1937 res = snd_pcm_oss_get_block_size(pcm_oss_file); 1938 if (res < 0) 1939 return res; 1940 return put_user(res, p); 1941 case SNDCTL_DSP_SETFMT: 1942 if (get_user(res, p)) 1943 return -EFAULT; 1944 res = snd_pcm_oss_set_format(pcm_oss_file, res); 1945 if (res < 0) 1946 return res; 1947 return put_user(res, p); 1948 case SOUND_PCM_READ_BITS: 1949 res = snd_pcm_oss_get_format(pcm_oss_file); 1950 if (res < 0) 1951 return res; 1952 return put_user(res, p); 1953 case SNDCTL_DSP_CHANNELS: 1954 if (get_user(res, p)) 1955 return -EFAULT; 1956 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 1957 if (res < 0) 1958 return res; 1959 return put_user(res, p); 1960 case SOUND_PCM_READ_CHANNELS: 1961 res = snd_pcm_oss_get_channels(pcm_oss_file); 1962 if (res < 0) 1963 return res; 1964 return put_user(res, p); 1965 case SOUND_PCM_WRITE_FILTER: 1966 case SOUND_PCM_READ_FILTER: 1967 return -EIO; 1968 case SNDCTL_DSP_POST: 1969 return snd_pcm_oss_post(pcm_oss_file); 1970 case SNDCTL_DSP_SUBDIVIDE: 1971 if (get_user(res, p)) 1972 return -EFAULT; 1973 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 1974 if (res < 0) 1975 return res; 1976 return put_user(res, p); 1977 case SNDCTL_DSP_SETFRAGMENT: 1978 if (get_user(res, p)) 1979 return -EFAULT; 1980 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 1981 case SNDCTL_DSP_GETFMTS: 1982 res = snd_pcm_oss_get_formats(pcm_oss_file); 1983 if (res < 0) 1984 return res; 1985 return put_user(res, p); 1986 case SNDCTL_DSP_GETOSPACE: 1987 case SNDCTL_DSP_GETISPACE: 1988 return snd_pcm_oss_get_space(pcm_oss_file, 1989 cmd == SNDCTL_DSP_GETISPACE ? 1990 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 1991 (struct audio_buf_info __user *) arg); 1992 case SNDCTL_DSP_NONBLOCK: 1993 return snd_pcm_oss_nonblock(file); 1994 case SNDCTL_DSP_GETCAPS: 1995 res = snd_pcm_oss_get_caps(pcm_oss_file); 1996 if (res < 0) 1997 return res; 1998 return put_user(res, p); 1999 case SNDCTL_DSP_GETTRIGGER: 2000 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2001 if (res < 0) 2002 return res; 2003 return put_user(res, p); 2004 case SNDCTL_DSP_SETTRIGGER: 2005 if (get_user(res, p)) 2006 return -EFAULT; 2007 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2008 case SNDCTL_DSP_GETIPTR: 2009 case SNDCTL_DSP_GETOPTR: 2010 return snd_pcm_oss_get_ptr(pcm_oss_file, 2011 cmd == SNDCTL_DSP_GETIPTR ? 2012 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2013 (struct count_info __user *) arg); 2014 case SNDCTL_DSP_MAPINBUF: 2015 case SNDCTL_DSP_MAPOUTBUF: 2016 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2017 cmd == SNDCTL_DSP_MAPINBUF ? 2018 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2019 (struct buffmem_desc __user *) arg); 2020 case SNDCTL_DSP_SETSYNCRO: 2021 /* stop DMA now.. */ 2022 return 0; 2023 case SNDCTL_DSP_SETDUPLEX: 2024 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2025 return 0; 2026 return -EIO; 2027 case SNDCTL_DSP_GETODELAY: 2028 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2029 if (res < 0) { 2030 /* it's for sure, some broken apps don't check for error codes */ 2031 put_user(0, p); 2032 return res; 2033 } 2034 return put_user(res, p); 2035 case SNDCTL_DSP_PROFILE: 2036 return 0; /* silently ignore */ 2037 default: 2038 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2039 } 2040 return -EINVAL; 2041 } 2042 2043 #ifdef CONFIG_COMPAT 2044 /* all compatible */ 2045 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2046 #else 2047 #define snd_pcm_oss_ioctl_compat NULL 2048 #endif 2049 2050 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2051 { 2052 struct snd_pcm_oss_file *pcm_oss_file; 2053 struct snd_pcm_substream *substream; 2054 2055 pcm_oss_file = file->private_data; 2056 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2057 if (substream == NULL) 2058 return -ENXIO; 2059 #ifndef OSS_DEBUG 2060 return snd_pcm_oss_read1(substream, buf, count); 2061 #else 2062 { 2063 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2064 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); 2065 return res; 2066 } 2067 #endif 2068 } 2069 2070 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2071 { 2072 struct snd_pcm_oss_file *pcm_oss_file; 2073 struct snd_pcm_substream *substream; 2074 long result; 2075 2076 pcm_oss_file = file->private_data; 2077 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2078 if (substream == NULL) 2079 return -ENXIO; 2080 result = snd_pcm_oss_write1(substream, buf, count); 2081 #ifdef OSS_DEBUG 2082 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); 2083 #endif 2084 return result; 2085 } 2086 2087 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2088 { 2089 struct snd_pcm_runtime *runtime = substream->runtime; 2090 if (atomic_read(&runtime->mmap_count)) 2091 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2092 else 2093 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; 2094 } 2095 2096 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2097 { 2098 struct snd_pcm_runtime *runtime = substream->runtime; 2099 if (atomic_read(&runtime->mmap_count)) 2100 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2101 else 2102 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; 2103 } 2104 2105 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2106 { 2107 struct snd_pcm_oss_file *pcm_oss_file; 2108 unsigned int mask; 2109 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2110 2111 pcm_oss_file = file->private_data; 2112 2113 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2114 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2115 2116 mask = 0; 2117 if (psubstream != NULL) { 2118 struct snd_pcm_runtime *runtime = psubstream->runtime; 2119 poll_wait(file, &runtime->sleep, wait); 2120 snd_pcm_stream_lock_irq(psubstream); 2121 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2122 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2123 snd_pcm_oss_playback_ready(psubstream))) 2124 mask |= POLLOUT | POLLWRNORM; 2125 snd_pcm_stream_unlock_irq(psubstream); 2126 } 2127 if (csubstream != NULL) { 2128 struct snd_pcm_runtime *runtime = csubstream->runtime; 2129 snd_pcm_state_t ostate; 2130 poll_wait(file, &runtime->sleep, wait); 2131 snd_pcm_stream_lock_irq(csubstream); 2132 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2133 snd_pcm_oss_capture_ready(csubstream)) 2134 mask |= POLLIN | POLLRDNORM; 2135 snd_pcm_stream_unlock_irq(csubstream); 2136 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2137 struct snd_pcm_oss_file ofile; 2138 memset(&ofile, 0, sizeof(ofile)); 2139 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2140 runtime->oss.trigger = 0; 2141 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2142 } 2143 } 2144 2145 return mask; 2146 } 2147 2148 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2149 { 2150 struct snd_pcm_oss_file *pcm_oss_file; 2151 struct snd_pcm_substream *substream = NULL; 2152 struct snd_pcm_runtime *runtime; 2153 int err; 2154 2155 #ifdef OSS_DEBUG 2156 printk("pcm_oss: mmap begin\n"); 2157 #endif 2158 pcm_oss_file = file->private_data; 2159 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2160 case VM_READ | VM_WRITE: 2161 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2162 if (substream) 2163 break; 2164 /* Fall through */ 2165 case VM_READ: 2166 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2167 break; 2168 case VM_WRITE: 2169 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2170 break; 2171 default: 2172 return -EINVAL; 2173 } 2174 /* set VM_READ access as well to fix memset() routines that do 2175 reads before writes (to improve performance) */ 2176 area->vm_flags |= VM_READ; 2177 if (substream == NULL) 2178 return -ENXIO; 2179 runtime = substream->runtime; 2180 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2181 return -EIO; 2182 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2183 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2184 else 2185 return -EIO; 2186 2187 if (runtime->oss.params) { 2188 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2189 return err; 2190 } 2191 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2192 if (runtime->oss.plugin_first != NULL) 2193 return -EIO; 2194 #endif 2195 2196 if (area->vm_pgoff != 0) 2197 return -EINVAL; 2198 2199 err = snd_pcm_mmap_data(substream, file, area); 2200 if (err < 0) 2201 return err; 2202 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2203 runtime->silence_threshold = 0; 2204 runtime->silence_size = 0; 2205 #ifdef OSS_DEBUG 2206 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); 2207 #endif 2208 /* In mmap mode we never stop */ 2209 runtime->stop_threshold = runtime->boundary; 2210 2211 return 0; 2212 } 2213 2214 #ifdef CONFIG_PROC_FS 2215 /* 2216 * /proc interface 2217 */ 2218 2219 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2220 struct snd_info_buffer *buffer) 2221 { 2222 struct snd_pcm_str *pstr = entry->private_data; 2223 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2224 mutex_lock(&pstr->oss.setup_mutex); 2225 while (setup) { 2226 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2227 setup->task_name, 2228 setup->periods, 2229 setup->period_size, 2230 setup->disable ? " disable" : "", 2231 setup->direct ? " direct" : "", 2232 setup->block ? " block" : "", 2233 setup->nonblock ? " non-block" : "", 2234 setup->partialfrag ? " partial-frag" : "", 2235 setup->nosilence ? " no-silence" : ""); 2236 setup = setup->next; 2237 } 2238 mutex_unlock(&pstr->oss.setup_mutex); 2239 } 2240 2241 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2242 { 2243 struct snd_pcm_oss_setup *setup, *setupn; 2244 2245 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2246 setup; setup = setupn) { 2247 setupn = setup->next; 2248 kfree(setup->task_name); 2249 kfree(setup); 2250 } 2251 pstr->oss.setup_list = NULL; 2252 } 2253 2254 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2255 struct snd_info_buffer *buffer) 2256 { 2257 struct snd_pcm_str *pstr = entry->private_data; 2258 char line[128], str[32], task_name[32], *ptr; 2259 int idx1; 2260 struct snd_pcm_oss_setup *setup, *setup1, template; 2261 2262 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2263 mutex_lock(&pstr->oss.setup_mutex); 2264 memset(&template, 0, sizeof(template)); 2265 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2266 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2267 snd_pcm_oss_proc_free_setup_list(pstr); 2268 mutex_unlock(&pstr->oss.setup_mutex); 2269 continue; 2270 } 2271 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2272 if (!strcmp(setup->task_name, task_name)) { 2273 template = *setup; 2274 break; 2275 } 2276 } 2277 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2278 template.periods = simple_strtoul(str, NULL, 10); 2279 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2280 template.period_size = simple_strtoul(str, NULL, 10); 2281 for (idx1 = 31; idx1 >= 0; idx1--) 2282 if (template.period_size & (1 << idx1)) 2283 break; 2284 for (idx1--; idx1 >= 0; idx1--) 2285 template.period_size &= ~(1 << idx1); 2286 do { 2287 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2288 if (!strcmp(str, "disable")) { 2289 template.disable = 1; 2290 } else if (!strcmp(str, "direct")) { 2291 template.direct = 1; 2292 } else if (!strcmp(str, "block")) { 2293 template.block = 1; 2294 } else if (!strcmp(str, "non-block")) { 2295 template.nonblock = 1; 2296 } else if (!strcmp(str, "partial-frag")) { 2297 template.partialfrag = 1; 2298 } else if (!strcmp(str, "no-silence")) { 2299 template.nosilence = 1; 2300 } else if (!strcmp(str, "buggy-ptr")) { 2301 template.buggyptr = 1; 2302 } 2303 } while (*str); 2304 if (setup == NULL) { 2305 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2306 if (! setup) { 2307 buffer->error = -ENOMEM; 2308 mutex_lock(&pstr->oss.setup_mutex); 2309 return; 2310 } 2311 if (pstr->oss.setup_list == NULL) 2312 pstr->oss.setup_list = setup; 2313 else { 2314 for (setup1 = pstr->oss.setup_list; 2315 setup1->next; setup1 = setup1->next); 2316 setup1->next = setup; 2317 } 2318 template.task_name = kstrdup(task_name, GFP_KERNEL); 2319 if (! template.task_name) { 2320 kfree(setup); 2321 buffer->error = -ENOMEM; 2322 mutex_lock(&pstr->oss.setup_mutex); 2323 return; 2324 } 2325 } 2326 *setup = template; 2327 mutex_unlock(&pstr->oss.setup_mutex); 2328 } 2329 } 2330 2331 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2332 { 2333 int stream; 2334 for (stream = 0; stream < 2; ++stream) { 2335 struct snd_info_entry *entry; 2336 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2337 if (pstr->substream_count == 0) 2338 continue; 2339 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2340 entry->content = SNDRV_INFO_CONTENT_TEXT; 2341 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2342 entry->c.text.read_size = 8192; 2343 entry->c.text.read = snd_pcm_oss_proc_read; 2344 entry->c.text.write_size = 8192; 2345 entry->c.text.write = snd_pcm_oss_proc_write; 2346 entry->private_data = pstr; 2347 if (snd_info_register(entry) < 0) { 2348 snd_info_free_entry(entry); 2349 entry = NULL; 2350 } 2351 } 2352 pstr->oss.proc_entry = entry; 2353 } 2354 } 2355 2356 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2357 { 2358 int stream; 2359 for (stream = 0; stream < 2; ++stream) { 2360 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2361 if (pstr->oss.proc_entry) { 2362 snd_info_unregister(pstr->oss.proc_entry); 2363 pstr->oss.proc_entry = NULL; 2364 snd_pcm_oss_proc_free_setup_list(pstr); 2365 } 2366 } 2367 } 2368 #else /* !CONFIG_PROC_FS */ 2369 #define snd_pcm_oss_proc_init(pcm) 2370 #define snd_pcm_oss_proc_done(pcm) 2371 #endif /* CONFIG_PROC_FS */ 2372 2373 /* 2374 * ENTRY functions 2375 */ 2376 2377 static struct file_operations snd_pcm_oss_f_reg = 2378 { 2379 .owner = THIS_MODULE, 2380 .read = snd_pcm_oss_read, 2381 .write = snd_pcm_oss_write, 2382 .open = snd_pcm_oss_open, 2383 .release = snd_pcm_oss_release, 2384 .poll = snd_pcm_oss_poll, 2385 .unlocked_ioctl = snd_pcm_oss_ioctl, 2386 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2387 .mmap = snd_pcm_oss_mmap, 2388 }; 2389 2390 static void register_oss_dsp(struct snd_pcm *pcm, int index) 2391 { 2392 char name[128]; 2393 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2394 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2395 pcm->card, index, &snd_pcm_oss_f_reg, 2396 pcm, name) < 0) { 2397 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 2398 pcm->card->number, pcm->device); 2399 } 2400 } 2401 2402 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 2403 { 2404 pcm->oss.reg = 0; 2405 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2406 char name[128]; 2407 int duplex; 2408 register_oss_dsp(pcm, 0); 2409 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2410 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2411 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2412 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2413 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2414 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2415 pcm->card->number, 2416 name); 2417 #endif 2418 pcm->oss.reg++; 2419 pcm->oss.reg_mask |= 1; 2420 } 2421 if (adsp_map[pcm->card->number] == (int)pcm->device) { 2422 register_oss_dsp(pcm, 1); 2423 pcm->oss.reg++; 2424 pcm->oss.reg_mask |= 2; 2425 } 2426 2427 if (pcm->oss.reg) 2428 snd_pcm_oss_proc_init(pcm); 2429 2430 return 0; 2431 } 2432 2433 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 2434 { 2435 if (pcm->oss.reg) { 2436 if (pcm->oss.reg_mask & 1) { 2437 pcm->oss.reg_mask &= ~1; 2438 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2439 pcm->card, 0); 2440 } 2441 if (pcm->oss.reg_mask & 2) { 2442 pcm->oss.reg_mask &= ~2; 2443 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2444 pcm->card, 1); 2445 } 2446 } 2447 return 0; 2448 } 2449 2450 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 2451 { 2452 snd_pcm_oss_disconnect_minor(pcm); 2453 if (pcm->oss.reg) { 2454 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2455 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2456 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 2457 #endif 2458 } 2459 pcm->oss.reg = 0; 2460 snd_pcm_oss_proc_done(pcm); 2461 } 2462 return 0; 2463 } 2464 2465 static struct snd_pcm_notify snd_pcm_oss_notify = 2466 { 2467 .n_register = snd_pcm_oss_register_minor, 2468 .n_disconnect = snd_pcm_oss_disconnect_minor, 2469 .n_unregister = snd_pcm_oss_unregister_minor, 2470 }; 2471 2472 static int __init alsa_pcm_oss_init(void) 2473 { 2474 int i; 2475 int err; 2476 2477 /* check device map table */ 2478 for (i = 0; i < SNDRV_CARDS; i++) { 2479 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 2480 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 2481 i, dsp_map[i]); 2482 dsp_map[i] = 0; 2483 } 2484 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 2485 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 2486 i, adsp_map[i]); 2487 adsp_map[i] = 1; 2488 } 2489 } 2490 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 2491 return err; 2492 return 0; 2493 } 2494 2495 static void __exit alsa_pcm_oss_exit(void) 2496 { 2497 snd_pcm_notify(&snd_pcm_oss_notify, 1); 2498 } 2499 2500 module_init(alsa_pcm_oss_init) 2501 module_exit(alsa_pcm_oss_exit) 2502