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 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 82 { 83 struct snd_pcm_runtime *runtime = substream->runtime; 84 struct snd_pcm_plugin *plugin, *next; 85 86 plugin = runtime->oss.plugin_first; 87 while (plugin) { 88 next = plugin->next; 89 snd_pcm_plugin_free(plugin); 90 plugin = next; 91 } 92 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 93 return 0; 94 } 95 96 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 97 { 98 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 99 plugin->next = runtime->oss.plugin_first; 100 plugin->prev = NULL; 101 if (runtime->oss.plugin_first) { 102 runtime->oss.plugin_first->prev = plugin; 103 runtime->oss.plugin_first = plugin; 104 } else { 105 runtime->oss.plugin_last = 106 runtime->oss.plugin_first = plugin; 107 } 108 return 0; 109 } 110 111 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 112 { 113 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 114 plugin->next = NULL; 115 plugin->prev = runtime->oss.plugin_last; 116 if (runtime->oss.plugin_last) { 117 runtime->oss.plugin_last->next = plugin; 118 runtime->oss.plugin_last = plugin; 119 } else { 120 runtime->oss.plugin_last = 121 runtime->oss.plugin_first = plugin; 122 } 123 return 0; 124 } 125 126 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 127 { 128 struct snd_pcm_runtime *runtime = substream->runtime; 129 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 130 long bytes = frames_to_bytes(runtime, frames); 131 if (buffer_size == runtime->oss.buffer_bytes) 132 return bytes; 133 #if BITS_PER_LONG >= 64 134 return runtime->oss.buffer_bytes * bytes / buffer_size; 135 #else 136 { 137 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 138 u32 rem; 139 div64_32(&bsize, buffer_size, &rem); 140 return (long)bsize; 141 } 142 #endif 143 } 144 145 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 146 { 147 struct snd_pcm_runtime *runtime = substream->runtime; 148 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 149 if (buffer_size == runtime->oss.buffer_bytes) 150 return bytes_to_frames(runtime, bytes); 151 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 152 } 153 154 static int snd_pcm_oss_format_from(int format) 155 { 156 switch (format) { 157 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 158 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 159 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 160 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 161 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 162 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 163 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 164 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 165 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 166 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 167 default: return SNDRV_PCM_FORMAT_U8; 168 } 169 } 170 171 static int snd_pcm_oss_format_to(int format) 172 { 173 switch (format) { 174 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 175 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 176 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 177 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 178 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 179 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 180 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 181 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 182 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 183 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 184 default: return -EINVAL; 185 } 186 } 187 188 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 189 struct snd_pcm_hw_params *oss_params, 190 struct snd_pcm_hw_params *slave_params) 191 { 192 size_t s; 193 size_t oss_buffer_size, oss_period_size, oss_periods; 194 size_t min_period_size, max_period_size; 195 struct snd_pcm_runtime *runtime = substream->runtime; 196 size_t oss_frame_size; 197 198 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 199 params_channels(oss_params) / 8; 200 201 oss_buffer_size = snd_pcm_plug_client_size(substream, 202 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 203 oss_buffer_size = 1 << ld2(oss_buffer_size); 204 if (atomic_read(&runtime->mmap_count)) { 205 if (oss_buffer_size > runtime->oss.mmap_bytes) 206 oss_buffer_size = runtime->oss.mmap_bytes; 207 } 208 209 if (substream->oss.setup && 210 substream->oss.setup->period_size > 16) 211 oss_period_size = substream->oss.setup->period_size; 212 else if (runtime->oss.fragshift) { 213 oss_period_size = 1 << runtime->oss.fragshift; 214 if (oss_period_size > oss_buffer_size / 2) 215 oss_period_size = oss_buffer_size / 2; 216 } else { 217 int sd; 218 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 219 220 oss_period_size = oss_buffer_size; 221 do { 222 oss_period_size /= 2; 223 } while (oss_period_size > bytes_per_sec); 224 if (runtime->oss.subdivision == 0) { 225 sd = 4; 226 if (oss_period_size / sd > 4096) 227 sd *= 2; 228 if (oss_period_size / sd < 4096) 229 sd = 1; 230 } else 231 sd = runtime->oss.subdivision; 232 oss_period_size /= sd; 233 if (oss_period_size < 16) 234 oss_period_size = 16; 235 } 236 237 min_period_size = snd_pcm_plug_client_size(substream, 238 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 239 min_period_size *= oss_frame_size; 240 min_period_size = 1 << (ld2(min_period_size - 1) + 1); 241 if (oss_period_size < min_period_size) 242 oss_period_size = min_period_size; 243 244 max_period_size = snd_pcm_plug_client_size(substream, 245 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 246 max_period_size *= oss_frame_size; 247 max_period_size = 1 << ld2(max_period_size); 248 if (oss_period_size > max_period_size) 249 oss_period_size = max_period_size; 250 251 oss_periods = oss_buffer_size / oss_period_size; 252 253 if (substream->oss.setup) { 254 if (substream->oss.setup->periods > 1) 255 oss_periods = substream->oss.setup->periods; 256 } 257 258 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 259 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 260 s = runtime->oss.maxfrags; 261 if (oss_periods > s) 262 oss_periods = s; 263 264 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 265 if (s < 2) 266 s = 2; 267 if (oss_periods < s) 268 oss_periods = s; 269 270 while (oss_period_size * oss_periods > oss_buffer_size) 271 oss_period_size /= 2; 272 273 snd_assert(oss_period_size >= 16, return -EINVAL); 274 runtime->oss.period_bytes = oss_period_size; 275 runtime->oss.period_frames = 1; 276 runtime->oss.periods = oss_periods; 277 return 0; 278 } 279 280 static int choose_rate(struct snd_pcm_substream *substream, 281 struct snd_pcm_hw_params *params, unsigned int best_rate) 282 { 283 struct snd_interval *it; 284 struct snd_pcm_hw_params *save; 285 unsigned int rate, prev; 286 287 save = kmalloc(sizeof(*save), GFP_KERNEL); 288 if (save == NULL) 289 return -ENOMEM; 290 *save = *params; 291 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 292 293 /* try multiples of the best rate */ 294 rate = best_rate; 295 for (;;) { 296 if (it->max < rate || (it->max == rate && it->openmax)) 297 break; 298 if (it->min < rate || (it->min == rate && !it->openmin)) { 299 int ret; 300 ret = snd_pcm_hw_param_set(substream, params, 301 SNDRV_PCM_HW_PARAM_RATE, 302 rate, 0); 303 if (ret == (int)rate) { 304 kfree(save); 305 return rate; 306 } 307 *params = *save; 308 } 309 prev = rate; 310 rate += best_rate; 311 if (rate <= prev) 312 break; 313 } 314 315 /* not found, use the nearest rate */ 316 kfree(save); 317 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 318 } 319 320 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 321 { 322 struct snd_pcm_runtime *runtime = substream->runtime; 323 struct snd_pcm_hw_params *params, *sparams; 324 struct snd_pcm_sw_params *sw_params; 325 ssize_t oss_buffer_size, oss_period_size; 326 size_t oss_frame_size; 327 int err; 328 int direct; 329 int format, sformat, n; 330 struct snd_mask sformat_mask; 331 struct snd_mask mask; 332 333 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 334 params = kmalloc(sizeof(*params), GFP_KERNEL); 335 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 336 if (!sw_params || !params || !sparams) { 337 snd_printd("No memory\n"); 338 err = -ENOMEM; 339 goto failure; 340 } 341 342 if (atomic_read(&runtime->mmap_count)) { 343 direct = 1; 344 } else { 345 struct snd_pcm_oss_setup *setup = substream->oss.setup; 346 direct = (setup != NULL && setup->direct); 347 } 348 349 _snd_pcm_hw_params_any(sparams); 350 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 351 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 352 snd_mask_none(&mask); 353 if (atomic_read(&runtime->mmap_count)) 354 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 355 else { 356 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); 357 if (!direct) 358 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 359 } 360 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 361 if (err < 0) { 362 snd_printd("No usable accesses\n"); 363 err = -EINVAL; 364 goto failure; 365 } 366 choose_rate(substream, sparams, runtime->oss.rate); 367 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 368 369 format = snd_pcm_oss_format_from(runtime->oss.format); 370 371 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 372 if (direct) 373 sformat = format; 374 else 375 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 376 377 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { 378 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { 379 if (snd_mask_test(&sformat_mask, sformat) && 380 snd_pcm_oss_format_to(sformat) >= 0) 381 break; 382 } 383 if (sformat > SNDRV_PCM_FORMAT_LAST) { 384 snd_printd("Cannot find a format!!!\n"); 385 err = -EINVAL; 386 goto failure; 387 } 388 } 389 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); 390 snd_assert(err >= 0, goto failure); 391 392 if (direct) { 393 memcpy(params, sparams, sizeof(*params)); 394 } else { 395 _snd_pcm_hw_params_any(params); 396 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 397 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 398 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 399 snd_pcm_oss_format_from(runtime->oss.format), 0); 400 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 401 runtime->oss.channels, 0); 402 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 403 runtime->oss.rate, 0); 404 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 405 params_access(params), params_format(params), 406 params_channels(params), params_rate(params)); 407 } 408 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 409 params_access(sparams), params_format(sparams), 410 params_channels(sparams), params_rate(sparams)); 411 412 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 413 params_channels(params) / 8; 414 415 snd_pcm_oss_plugin_clear(substream); 416 if (!direct) { 417 /* add necessary plugins */ 418 snd_pcm_oss_plugin_clear(substream); 419 if ((err = snd_pcm_plug_format_plugins(substream, 420 params, 421 sparams)) < 0) { 422 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); 423 snd_pcm_oss_plugin_clear(substream); 424 goto failure; 425 } 426 if (runtime->oss.plugin_first) { 427 struct snd_pcm_plugin *plugin; 428 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 429 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 430 snd_pcm_oss_plugin_clear(substream); 431 goto failure; 432 } 433 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 434 err = snd_pcm_plugin_append(plugin); 435 } else { 436 err = snd_pcm_plugin_insert(plugin); 437 } 438 if (err < 0) { 439 snd_pcm_oss_plugin_clear(substream); 440 goto failure; 441 } 442 } 443 } 444 445 err = snd_pcm_oss_period_size(substream, params, sparams); 446 if (err < 0) 447 goto failure; 448 449 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 450 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 451 snd_assert(err >= 0, goto failure); 452 453 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 454 runtime->oss.periods, NULL); 455 snd_assert(err >= 0, goto failure); 456 457 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 458 459 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 460 snd_printd("HW_PARAMS failed: %i\n", err); 461 goto failure; 462 } 463 464 memset(sw_params, 0, sizeof(*sw_params)); 465 if (runtime->oss.trigger) { 466 sw_params->start_threshold = 1; 467 } else { 468 sw_params->start_threshold = runtime->boundary; 469 } 470 if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE) 471 sw_params->stop_threshold = runtime->boundary; 472 else 473 sw_params->stop_threshold = runtime->buffer_size; 474 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 475 sw_params->period_step = 1; 476 sw_params->sleep_min = 0; 477 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 478 1 : runtime->period_size; 479 sw_params->xfer_align = 1; 480 if (atomic_read(&runtime->mmap_count) || 481 (substream->oss.setup && substream->oss.setup->nosilence)) { 482 sw_params->silence_threshold = 0; 483 sw_params->silence_size = 0; 484 } else { 485 snd_pcm_uframes_t frames; 486 frames = runtime->period_size + 16; 487 if (frames > runtime->buffer_size) 488 frames = runtime->buffer_size; 489 sw_params->silence_threshold = frames; 490 sw_params->silence_size = frames; 491 } 492 493 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 494 snd_printd("SW_PARAMS failed: %i\n", err); 495 goto failure; 496 } 497 498 runtime->oss.periods = params_periods(sparams); 499 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 500 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure); 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 oss_period_size *= oss_frame_size; 507 508 oss_buffer_size = oss_period_size * runtime->oss.periods; 509 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure); 510 511 runtime->oss.period_bytes = oss_period_size; 512 runtime->oss.buffer_bytes = oss_buffer_size; 513 514 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 515 runtime->oss.period_bytes, 516 runtime->oss.buffer_bytes); 517 pdprintf("slave: period_size = %i, buffer_size = %i\n", 518 params_period_size(sparams), 519 params_buffer_size(sparams)); 520 521 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 522 runtime->oss.channels = params_channels(params); 523 runtime->oss.rate = params_rate(params); 524 525 runtime->oss.params = 0; 526 runtime->oss.prepare = 1; 527 vfree(runtime->oss.buffer); 528 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 529 runtime->oss.buffer_used = 0; 530 if (runtime->dma_area) 531 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 532 533 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 534 535 err = 0; 536 failure: 537 kfree(sw_params); 538 kfree(params); 539 kfree(sparams); 540 return err; 541 } 542 543 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 544 { 545 int idx, err; 546 struct snd_pcm_substream *asubstream = NULL, *substream; 547 548 for (idx = 0; idx < 2; idx++) { 549 substream = pcm_oss_file->streams[idx]; 550 if (substream == NULL) 551 continue; 552 if (asubstream == NULL) 553 asubstream = substream; 554 if (substream->runtime->oss.params) { 555 err = snd_pcm_oss_change_params(substream); 556 if (err < 0) 557 return err; 558 } 559 } 560 snd_assert(asubstream != NULL, return -EIO); 561 if (r_substream) 562 *r_substream = asubstream; 563 return 0; 564 } 565 566 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 567 { 568 int err; 569 struct snd_pcm_runtime *runtime = substream->runtime; 570 571 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 572 if (err < 0) { 573 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 574 return err; 575 } 576 runtime->oss.prepare = 0; 577 runtime->oss.prev_hw_ptr_interrupt = 0; 578 runtime->oss.period_ptr = 0; 579 runtime->oss.buffer_used = 0; 580 581 return 0; 582 } 583 584 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 585 { 586 struct snd_pcm_runtime *runtime; 587 int err; 588 589 if (substream == NULL) 590 return 0; 591 runtime = substream->runtime; 592 if (runtime->oss.params) { 593 err = snd_pcm_oss_change_params(substream); 594 if (err < 0) 595 return err; 596 } 597 if (runtime->oss.prepare) { 598 err = snd_pcm_oss_prepare(substream); 599 if (err < 0) 600 return err; 601 } 602 return 0; 603 } 604 605 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 606 { 607 struct snd_pcm_runtime *runtime; 608 snd_pcm_uframes_t frames; 609 int err = 0; 610 611 while (1) { 612 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 613 if (err < 0) 614 break; 615 runtime = substream->runtime; 616 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 617 break; 618 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 619 /* until avail(delay) <= buffer_size */ 620 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 621 frames /= runtime->period_size; 622 frames *= runtime->period_size; 623 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 624 if (err < 0) 625 break; 626 } 627 return err; 628 } 629 630 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 631 { 632 struct snd_pcm_runtime *runtime = substream->runtime; 633 int ret; 634 while (1) { 635 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 636 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 637 #ifdef OSS_DEBUG 638 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 639 printk("pcm_oss: write: recovering from XRUN\n"); 640 else 641 printk("pcm_oss: write: recovering from SUSPEND\n"); 642 #endif 643 ret = snd_pcm_oss_prepare(substream); 644 if (ret < 0) 645 break; 646 } 647 if (in_kernel) { 648 mm_segment_t fs; 649 fs = snd_enter_user(); 650 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 651 snd_leave_user(fs); 652 } else { 653 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 654 } 655 if (ret != -EPIPE && ret != -ESTRPIPE) 656 break; 657 /* test, if we can't store new data, because the stream */ 658 /* has not been started */ 659 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 660 return -EAGAIN; 661 } 662 return ret; 663 } 664 665 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 666 { 667 struct snd_pcm_runtime *runtime = substream->runtime; 668 snd_pcm_sframes_t delay; 669 int ret; 670 while (1) { 671 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 672 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 673 #ifdef OSS_DEBUG 674 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 675 printk("pcm_oss: read: recovering from XRUN\n"); 676 else 677 printk("pcm_oss: read: recovering from SUSPEND\n"); 678 #endif 679 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 680 if (ret < 0) 681 break; 682 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 683 ret = snd_pcm_oss_prepare(substream); 684 if (ret < 0) 685 break; 686 } 687 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 688 if (ret < 0) 689 break; 690 if (in_kernel) { 691 mm_segment_t fs; 692 fs = snd_enter_user(); 693 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 694 snd_leave_user(fs); 695 } else { 696 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 697 } 698 if (ret == -EPIPE) { 699 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 700 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 701 if (ret < 0) 702 break; 703 } 704 continue; 705 } 706 if (ret != -ESTRPIPE) 707 break; 708 } 709 return ret; 710 } 711 712 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 713 { 714 struct snd_pcm_runtime *runtime = substream->runtime; 715 int ret; 716 while (1) { 717 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 718 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 719 #ifdef OSS_DEBUG 720 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 721 printk("pcm_oss: writev: recovering from XRUN\n"); 722 else 723 printk("pcm_oss: writev: recovering from SUSPEND\n"); 724 #endif 725 ret = snd_pcm_oss_prepare(substream); 726 if (ret < 0) 727 break; 728 } 729 if (in_kernel) { 730 mm_segment_t fs; 731 fs = snd_enter_user(); 732 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 733 snd_leave_user(fs); 734 } else { 735 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 736 } 737 if (ret != -EPIPE && ret != -ESTRPIPE) 738 break; 739 740 /* test, if we can't store new data, because the stream */ 741 /* has not been started */ 742 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 743 return -EAGAIN; 744 } 745 return ret; 746 } 747 748 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 749 { 750 struct snd_pcm_runtime *runtime = substream->runtime; 751 int ret; 752 while (1) { 753 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 754 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 755 #ifdef OSS_DEBUG 756 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 757 printk("pcm_oss: readv: recovering from XRUN\n"); 758 else 759 printk("pcm_oss: readv: recovering from SUSPEND\n"); 760 #endif 761 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 762 if (ret < 0) 763 break; 764 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 765 ret = snd_pcm_oss_prepare(substream); 766 if (ret < 0) 767 break; 768 } 769 if (in_kernel) { 770 mm_segment_t fs; 771 fs = snd_enter_user(); 772 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 773 snd_leave_user(fs); 774 } else { 775 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 776 } 777 if (ret != -EPIPE && ret != -ESTRPIPE) 778 break; 779 } 780 return ret; 781 } 782 783 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 784 { 785 struct snd_pcm_runtime *runtime = substream->runtime; 786 snd_pcm_sframes_t frames, frames1; 787 if (runtime->oss.plugin_first) { 788 struct snd_pcm_plugin_channel *channels; 789 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 790 if (!in_kernel) { 791 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) 792 return -EFAULT; 793 buf = runtime->oss.buffer; 794 } 795 frames = bytes / oss_frame_bytes; 796 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 797 if (frames1 < 0) 798 return frames1; 799 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 800 if (frames1 <= 0) 801 return frames1; 802 bytes = frames1 * oss_frame_bytes; 803 } else { 804 frames = bytes_to_frames(runtime, bytes); 805 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 806 if (frames1 <= 0) 807 return frames1; 808 bytes = frames_to_bytes(runtime, frames1); 809 } 810 return bytes; 811 } 812 813 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 814 { 815 size_t xfer = 0; 816 ssize_t tmp; 817 struct snd_pcm_runtime *runtime = substream->runtime; 818 819 if (atomic_read(&runtime->mmap_count)) 820 return -ENXIO; 821 822 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 823 return tmp; 824 while (bytes > 0) { 825 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 826 tmp = bytes; 827 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 828 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 829 if (tmp > 0) { 830 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) 831 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT; 832 } 833 runtime->oss.buffer_used += tmp; 834 buf += tmp; 835 bytes -= tmp; 836 xfer += tmp; 837 if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) || 838 runtime->oss.buffer_used == runtime->oss.period_bytes) { 839 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 840 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 841 if (tmp <= 0) 842 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 843 runtime->oss.bytes += tmp; 844 runtime->oss.period_ptr += tmp; 845 runtime->oss.period_ptr %= runtime->oss.period_bytes; 846 if (runtime->oss.period_ptr == 0 || 847 runtime->oss.period_ptr == runtime->oss.buffer_used) 848 runtime->oss.buffer_used = 0; 849 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0) 850 return xfer > 0 ? xfer : -EAGAIN; 851 } 852 } else { 853 tmp = snd_pcm_oss_write2(substream, 854 (const char __force *)buf, 855 runtime->oss.period_bytes, 0); 856 if (tmp <= 0) 857 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 858 runtime->oss.bytes += tmp; 859 buf += tmp; 860 bytes -= tmp; 861 xfer += tmp; 862 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 && 863 tmp != runtime->oss.period_bytes) 864 break; 865 } 866 } 867 return xfer; 868 } 869 870 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 871 { 872 struct snd_pcm_runtime *runtime = substream->runtime; 873 snd_pcm_sframes_t frames, frames1; 874 char __user *final_dst = (char __user *)buf; 875 if (runtime->oss.plugin_first) { 876 struct snd_pcm_plugin_channel *channels; 877 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 878 if (!in_kernel) 879 buf = runtime->oss.buffer; 880 frames = bytes / oss_frame_bytes; 881 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 882 if (frames1 < 0) 883 return frames1; 884 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 885 if (frames1 <= 0) 886 return frames1; 887 bytes = frames1 * oss_frame_bytes; 888 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 889 return -EFAULT; 890 } else { 891 frames = bytes_to_frames(runtime, bytes); 892 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 893 if (frames1 <= 0) 894 return frames1; 895 bytes = frames_to_bytes(runtime, frames1); 896 } 897 return bytes; 898 } 899 900 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 901 { 902 size_t xfer = 0; 903 ssize_t tmp; 904 struct snd_pcm_runtime *runtime = substream->runtime; 905 906 if (atomic_read(&runtime->mmap_count)) 907 return -ENXIO; 908 909 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 910 return tmp; 911 while (bytes > 0) { 912 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 913 if (runtime->oss.buffer_used == 0) { 914 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 915 if (tmp <= 0) 916 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 917 runtime->oss.bytes += tmp; 918 runtime->oss.period_ptr = tmp; 919 runtime->oss.buffer_used = tmp; 920 } 921 tmp = bytes; 922 if ((size_t) tmp > runtime->oss.buffer_used) 923 tmp = runtime->oss.buffer_used; 924 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) 925 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT; 926 buf += tmp; 927 bytes -= tmp; 928 xfer += tmp; 929 runtime->oss.buffer_used -= tmp; 930 } else { 931 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 932 runtime->oss.period_bytes, 0); 933 if (tmp <= 0) 934 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 935 runtime->oss.bytes += tmp; 936 buf += tmp; 937 bytes -= tmp; 938 xfer += tmp; 939 } 940 } 941 return xfer; 942 } 943 944 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 945 { 946 struct snd_pcm_substream *substream; 947 948 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 949 if (substream != NULL) { 950 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 951 substream->runtime->oss.prepare = 1; 952 } 953 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 954 if (substream != NULL) { 955 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 956 substream->runtime->oss.prepare = 1; 957 } 958 return 0; 959 } 960 961 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 962 { 963 struct snd_pcm_substream *substream; 964 int err; 965 966 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 967 if (substream != NULL) { 968 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 969 return err; 970 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 971 } 972 /* note: all errors from the start action are ignored */ 973 /* OSS apps do not know, how to handle them */ 974 return 0; 975 } 976 977 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 978 { 979 struct snd_pcm_runtime *runtime; 980 ssize_t result = 0; 981 long res; 982 wait_queue_t wait; 983 984 runtime = substream->runtime; 985 init_waitqueue_entry(&wait, current); 986 add_wait_queue(&runtime->sleep, &wait); 987 #ifdef OSS_DEBUG 988 printk("sync1: size = %li\n", size); 989 #endif 990 while (1) { 991 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 992 if (result > 0) { 993 runtime->oss.buffer_used = 0; 994 result = 0; 995 break; 996 } 997 if (result != 0 && result != -EAGAIN) 998 break; 999 result = 0; 1000 set_current_state(TASK_INTERRUPTIBLE); 1001 snd_pcm_stream_lock_irq(substream); 1002 res = runtime->status->state; 1003 snd_pcm_stream_unlock_irq(substream); 1004 if (res != SNDRV_PCM_STATE_RUNNING) { 1005 set_current_state(TASK_RUNNING); 1006 break; 1007 } 1008 res = schedule_timeout(10 * HZ); 1009 if (signal_pending(current)) { 1010 result = -ERESTARTSYS; 1011 break; 1012 } 1013 if (res == 0) { 1014 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1015 result = -EIO; 1016 break; 1017 } 1018 } 1019 remove_wait_queue(&runtime->sleep, &wait); 1020 return result; 1021 } 1022 1023 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1024 { 1025 int err = 0; 1026 unsigned int saved_f_flags; 1027 struct snd_pcm_substream *substream; 1028 struct snd_pcm_runtime *runtime; 1029 snd_pcm_format_t format; 1030 unsigned long width; 1031 size_t size; 1032 1033 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1034 if (substream != NULL) { 1035 runtime = substream->runtime; 1036 if (atomic_read(&runtime->mmap_count)) 1037 goto __direct; 1038 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1039 return err; 1040 format = snd_pcm_oss_format_from(runtime->oss.format); 1041 width = snd_pcm_format_physical_width(format); 1042 if (runtime->oss.buffer_used > 0) { 1043 #ifdef OSS_DEBUG 1044 printk("sync: buffer_used\n"); 1045 #endif 1046 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1047 snd_pcm_format_set_silence(format, 1048 runtime->oss.buffer + runtime->oss.buffer_used, 1049 size); 1050 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1051 if (err < 0) 1052 return err; 1053 } else if (runtime->oss.period_ptr > 0) { 1054 #ifdef OSS_DEBUG 1055 printk("sync: period_ptr\n"); 1056 #endif 1057 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1058 snd_pcm_format_set_silence(format, 1059 runtime->oss.buffer, 1060 size * 8 / width); 1061 err = snd_pcm_oss_sync1(substream, size); 1062 if (err < 0) 1063 return err; 1064 } 1065 /* 1066 * The ALSA's period might be a bit large than OSS one. 1067 * Fill the remain portion of ALSA period with zeros. 1068 */ 1069 size = runtime->control->appl_ptr % runtime->period_size; 1070 if (size > 0) { 1071 size = runtime->period_size - size; 1072 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1073 size = (runtime->frame_bits * size) / 8; 1074 while (size > 0) { 1075 mm_segment_t fs; 1076 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1077 size -= size1; 1078 size1 *= 8; 1079 size1 /= runtime->sample_bits; 1080 snd_pcm_format_set_silence(runtime->format, 1081 runtime->oss.buffer, 1082 size1); 1083 fs = snd_enter_user(); 1084 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1085 snd_leave_user(fs); 1086 } 1087 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1088 void __user *buffers[runtime->channels]; 1089 memset(buffers, 0, runtime->channels * sizeof(void *)); 1090 snd_pcm_lib_writev(substream, buffers, size); 1091 } 1092 } 1093 /* 1094 * finish sync: drain the buffer 1095 */ 1096 __direct: 1097 saved_f_flags = substream->ffile->f_flags; 1098 substream->ffile->f_flags &= ~O_NONBLOCK; 1099 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1100 substream->ffile->f_flags = saved_f_flags; 1101 if (err < 0) 1102 return err; 1103 runtime->oss.prepare = 1; 1104 } 1105 1106 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1107 if (substream != NULL) { 1108 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1109 return err; 1110 runtime = substream->runtime; 1111 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1112 if (err < 0) 1113 return err; 1114 runtime->oss.buffer_used = 0; 1115 runtime->oss.prepare = 1; 1116 } 1117 return 0; 1118 } 1119 1120 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1121 { 1122 int idx; 1123 1124 for (idx = 1; idx >= 0; --idx) { 1125 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1126 struct snd_pcm_runtime *runtime; 1127 if (substream == NULL) 1128 continue; 1129 runtime = substream->runtime; 1130 if (rate < 1000) 1131 rate = 1000; 1132 else if (rate > 192000) 1133 rate = 192000; 1134 if (runtime->oss.rate != rate) { 1135 runtime->oss.params = 1; 1136 runtime->oss.rate = rate; 1137 } 1138 } 1139 return snd_pcm_oss_get_rate(pcm_oss_file); 1140 } 1141 1142 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1143 { 1144 struct snd_pcm_substream *substream; 1145 int err; 1146 1147 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1148 return err; 1149 return substream->runtime->oss.rate; 1150 } 1151 1152 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1153 { 1154 int idx; 1155 if (channels < 1) 1156 channels = 1; 1157 if (channels > 128) 1158 return -EINVAL; 1159 for (idx = 1; idx >= 0; --idx) { 1160 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1161 struct snd_pcm_runtime *runtime; 1162 if (substream == NULL) 1163 continue; 1164 runtime = substream->runtime; 1165 if (runtime->oss.channels != channels) { 1166 runtime->oss.params = 1; 1167 runtime->oss.channels = channels; 1168 } 1169 } 1170 return snd_pcm_oss_get_channels(pcm_oss_file); 1171 } 1172 1173 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1174 { 1175 struct snd_pcm_substream *substream; 1176 int err; 1177 1178 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1179 return err; 1180 return substream->runtime->oss.channels; 1181 } 1182 1183 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1184 { 1185 struct snd_pcm_substream *substream; 1186 int err; 1187 1188 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1189 return err; 1190 return substream->runtime->oss.period_bytes; 1191 } 1192 1193 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1194 { 1195 struct snd_pcm_substream *substream; 1196 int err; 1197 int direct; 1198 struct snd_pcm_hw_params *params; 1199 unsigned int formats = 0; 1200 struct snd_mask format_mask; 1201 int fmt; 1202 1203 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1204 return err; 1205 if (atomic_read(&substream->runtime->mmap_count)) { 1206 direct = 1; 1207 } else { 1208 struct snd_pcm_oss_setup *setup = substream->oss.setup; 1209 direct = (setup != NULL && setup->direct); 1210 } 1211 if (!direct) 1212 return AFMT_MU_LAW | AFMT_U8 | 1213 AFMT_S16_LE | AFMT_S16_BE | 1214 AFMT_S8 | AFMT_U16_LE | 1215 AFMT_U16_BE; 1216 params = kmalloc(sizeof(*params), GFP_KERNEL); 1217 if (!params) 1218 return -ENOMEM; 1219 _snd_pcm_hw_params_any(params); 1220 err = snd_pcm_hw_refine(substream, params); 1221 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1222 kfree(params); 1223 snd_assert(err >= 0, return err); 1224 for (fmt = 0; fmt < 32; ++fmt) { 1225 if (snd_mask_test(&format_mask, fmt)) { 1226 int f = snd_pcm_oss_format_to(fmt); 1227 if (f >= 0) 1228 formats |= f; 1229 } 1230 } 1231 return formats; 1232 } 1233 1234 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1235 { 1236 int formats, idx; 1237 1238 if (format != AFMT_QUERY) { 1239 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1240 if (!(formats & format)) 1241 format = AFMT_U8; 1242 for (idx = 1; idx >= 0; --idx) { 1243 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1244 struct snd_pcm_runtime *runtime; 1245 if (substream == NULL) 1246 continue; 1247 runtime = substream->runtime; 1248 if (runtime->oss.format != format) { 1249 runtime->oss.params = 1; 1250 runtime->oss.format = format; 1251 } 1252 } 1253 } 1254 return snd_pcm_oss_get_format(pcm_oss_file); 1255 } 1256 1257 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1258 { 1259 struct snd_pcm_substream *substream; 1260 int err; 1261 1262 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1263 return err; 1264 return substream->runtime->oss.format; 1265 } 1266 1267 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1268 { 1269 struct snd_pcm_runtime *runtime; 1270 1271 if (substream == NULL) 1272 return 0; 1273 runtime = substream->runtime; 1274 if (subdivide == 0) { 1275 subdivide = runtime->oss.subdivision; 1276 if (subdivide == 0) 1277 subdivide = 1; 1278 return subdivide; 1279 } 1280 if (runtime->oss.subdivision || runtime->oss.fragshift) 1281 return -EINVAL; 1282 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1283 subdivide != 8 && subdivide != 16) 1284 return -EINVAL; 1285 runtime->oss.subdivision = subdivide; 1286 runtime->oss.params = 1; 1287 return subdivide; 1288 } 1289 1290 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1291 { 1292 int err = -EINVAL, idx; 1293 1294 for (idx = 1; idx >= 0; --idx) { 1295 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1296 if (substream == NULL) 1297 continue; 1298 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1299 return err; 1300 } 1301 return err; 1302 } 1303 1304 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1305 { 1306 struct snd_pcm_runtime *runtime; 1307 1308 if (substream == NULL) 1309 return 0; 1310 runtime = substream->runtime; 1311 if (runtime->oss.subdivision || runtime->oss.fragshift) 1312 return -EINVAL; 1313 runtime->oss.fragshift = val & 0xffff; 1314 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1315 if (runtime->oss.fragshift < 4) /* < 16 */ 1316 runtime->oss.fragshift = 4; 1317 if (runtime->oss.maxfrags < 2) 1318 runtime->oss.maxfrags = 2; 1319 runtime->oss.params = 1; 1320 return 0; 1321 } 1322 1323 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1324 { 1325 int err = -EINVAL, idx; 1326 1327 for (idx = 1; idx >= 0; --idx) { 1328 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1329 if (substream == NULL) 1330 continue; 1331 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1332 return err; 1333 } 1334 return err; 1335 } 1336 1337 static int snd_pcm_oss_nonblock(struct file * file) 1338 { 1339 file->f_flags |= O_NONBLOCK; 1340 return 0; 1341 } 1342 1343 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1344 { 1345 1346 if (substream == NULL) { 1347 res &= ~DSP_CAP_DUPLEX; 1348 return res; 1349 } 1350 #ifdef DSP_CAP_MULTI 1351 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1352 if (substream->pstr->substream_count > 1) 1353 res |= DSP_CAP_MULTI; 1354 #endif 1355 /* DSP_CAP_REALTIME is set all times: */ 1356 /* all ALSA drivers can return actual pointer in ring buffer */ 1357 #if defined(DSP_CAP_REALTIME) && 0 1358 { 1359 struct snd_pcm_runtime *runtime = substream->runtime; 1360 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1361 res &= ~DSP_CAP_REALTIME; 1362 } 1363 #endif 1364 return res; 1365 } 1366 1367 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1368 { 1369 int result, idx; 1370 1371 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1372 for (idx = 0; idx < 2; idx++) { 1373 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1374 result = snd_pcm_oss_get_caps1(substream, result); 1375 } 1376 result |= 0x0001; /* revision - same as SB AWE 64 */ 1377 return result; 1378 } 1379 1380 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr) 1381 { 1382 struct snd_pcm_runtime *runtime = substream->runtime; 1383 snd_pcm_uframes_t appl_ptr; 1384 appl_ptr = hw_ptr + runtime->buffer_size; 1385 appl_ptr %= runtime->boundary; 1386 runtime->control->appl_ptr = appl_ptr; 1387 } 1388 1389 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1390 { 1391 struct snd_pcm_runtime *runtime; 1392 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1393 int err, cmd; 1394 1395 #ifdef OSS_DEBUG 1396 printk("pcm_oss: trigger = 0x%x\n", trigger); 1397 #endif 1398 1399 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1400 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1401 1402 if (psubstream) { 1403 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1404 return err; 1405 } 1406 if (csubstream) { 1407 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1408 return err; 1409 } 1410 if (psubstream) { 1411 runtime = psubstream->runtime; 1412 if (trigger & PCM_ENABLE_OUTPUT) { 1413 if (runtime->oss.trigger) 1414 goto _skip1; 1415 if (atomic_read(&psubstream->runtime->mmap_count)) 1416 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); 1417 runtime->oss.trigger = 1; 1418 runtime->start_threshold = 1; 1419 cmd = SNDRV_PCM_IOCTL_START; 1420 } else { 1421 if (!runtime->oss.trigger) 1422 goto _skip1; 1423 runtime->oss.trigger = 0; 1424 runtime->start_threshold = runtime->boundary; 1425 cmd = SNDRV_PCM_IOCTL_DROP; 1426 runtime->oss.prepare = 1; 1427 } 1428 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL); 1429 if (err < 0) 1430 return err; 1431 } 1432 _skip1: 1433 if (csubstream) { 1434 runtime = csubstream->runtime; 1435 if (trigger & PCM_ENABLE_INPUT) { 1436 if (runtime->oss.trigger) 1437 goto _skip2; 1438 runtime->oss.trigger = 1; 1439 runtime->start_threshold = 1; 1440 cmd = SNDRV_PCM_IOCTL_START; 1441 } else { 1442 if (!runtime->oss.trigger) 1443 goto _skip2; 1444 runtime->oss.trigger = 0; 1445 runtime->start_threshold = runtime->boundary; 1446 cmd = SNDRV_PCM_IOCTL_DROP; 1447 runtime->oss.prepare = 1; 1448 } 1449 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL); 1450 if (err < 0) 1451 return err; 1452 } 1453 _skip2: 1454 return 0; 1455 } 1456 1457 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 1458 { 1459 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1460 int result = 0; 1461 1462 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1463 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1464 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 1465 result |= PCM_ENABLE_OUTPUT; 1466 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 1467 result |= PCM_ENABLE_INPUT; 1468 return result; 1469 } 1470 1471 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 1472 { 1473 struct snd_pcm_substream *substream; 1474 struct snd_pcm_runtime *runtime; 1475 snd_pcm_sframes_t delay; 1476 int err; 1477 1478 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1479 if (substream == NULL) 1480 return -EINVAL; 1481 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1482 return err; 1483 runtime = substream->runtime; 1484 if (runtime->oss.params || runtime->oss.prepare) 1485 return 0; 1486 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 1487 if (err == -EPIPE) 1488 delay = 0; /* hack for broken OSS applications */ 1489 else if (err < 0) 1490 return err; 1491 return snd_pcm_oss_bytes(substream, delay); 1492 } 1493 1494 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 1495 { 1496 struct snd_pcm_substream *substream; 1497 struct snd_pcm_runtime *runtime; 1498 snd_pcm_sframes_t delay; 1499 int fixup; 1500 struct count_info info; 1501 int err; 1502 1503 if (_info == NULL) 1504 return -EFAULT; 1505 substream = pcm_oss_file->streams[stream]; 1506 if (substream == NULL) 1507 return -EINVAL; 1508 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1509 return err; 1510 runtime = substream->runtime; 1511 if (runtime->oss.params || runtime->oss.prepare) { 1512 memset(&info, 0, sizeof(info)); 1513 if (copy_to_user(_info, &info, sizeof(info))) 1514 return -EFAULT; 1515 return 0; 1516 } 1517 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1518 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 1519 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 1520 err = 0; 1521 delay = 0; 1522 fixup = 0; 1523 } else { 1524 fixup = runtime->oss.buffer_used; 1525 } 1526 } else { 1527 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 1528 fixup = -runtime->oss.buffer_used; 1529 } 1530 if (err < 0) 1531 return err; 1532 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 1533 if (atomic_read(&runtime->mmap_count)) { 1534 snd_pcm_sframes_t n; 1535 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; 1536 if (n < 0) 1537 n += runtime->boundary; 1538 info.blocks = n / runtime->period_size; 1539 runtime->oss.prev_hw_ptr_interrupt = delay; 1540 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1541 snd_pcm_oss_simulate_fill(substream, delay); 1542 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 1543 } else { 1544 delay = snd_pcm_oss_bytes(substream, delay); 1545 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1546 struct snd_pcm_oss_setup *setup = substream->oss.setup; 1547 if (setup && setup->buggyptr) 1548 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 1549 else 1550 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 1551 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 1552 } else { 1553 delay += fixup; 1554 info.blocks = delay / runtime->oss.period_bytes; 1555 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 1556 } 1557 } 1558 if (copy_to_user(_info, &info, sizeof(info))) 1559 return -EFAULT; 1560 return 0; 1561 } 1562 1563 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 1564 { 1565 struct snd_pcm_substream *substream; 1566 struct snd_pcm_runtime *runtime; 1567 snd_pcm_sframes_t avail; 1568 int fixup; 1569 struct audio_buf_info info; 1570 int err; 1571 1572 if (_info == NULL) 1573 return -EFAULT; 1574 substream = pcm_oss_file->streams[stream]; 1575 if (substream == NULL) 1576 return -EINVAL; 1577 runtime = substream->runtime; 1578 1579 if (runtime->oss.params && 1580 (err = snd_pcm_oss_change_params(substream)) < 0) 1581 return err; 1582 1583 info.fragsize = runtime->oss.period_bytes; 1584 info.fragstotal = runtime->periods; 1585 if (runtime->oss.prepare) { 1586 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1587 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 1588 info.fragments = runtime->oss.periods; 1589 } else { 1590 info.bytes = 0; 1591 info.fragments = 0; 1592 } 1593 } else { 1594 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1595 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 1596 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 1597 avail = runtime->buffer_size; 1598 err = 0; 1599 fixup = 0; 1600 } else { 1601 avail = runtime->buffer_size - avail; 1602 fixup = -runtime->oss.buffer_used; 1603 } 1604 } else { 1605 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 1606 fixup = runtime->oss.buffer_used; 1607 } 1608 if (err < 0) 1609 return err; 1610 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 1611 info.fragments = info.bytes / runtime->oss.period_bytes; 1612 } 1613 1614 #ifdef OSS_DEBUG 1615 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); 1616 #endif 1617 if (copy_to_user(_info, &info, sizeof(info))) 1618 return -EFAULT; 1619 return 0; 1620 } 1621 1622 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 1623 { 1624 // it won't be probably implemented 1625 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 1626 return -EINVAL; 1627 } 1628 1629 static struct snd_pcm_oss_setup *snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, const char *task_name) 1630 { 1631 const char *ptr, *ptrl; 1632 struct snd_pcm_oss_setup *setup; 1633 1634 down(&pcm->streams[stream].oss.setup_mutex); 1635 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { 1636 if (!strcmp(setup->task_name, task_name)) { 1637 up(&pcm->streams[stream].oss.setup_mutex); 1638 return setup; 1639 } 1640 } 1641 ptr = ptrl = task_name; 1642 while (*ptr) { 1643 if (*ptr == '/') 1644 ptrl = ptr + 1; 1645 ptr++; 1646 } 1647 if (ptrl == task_name) { 1648 goto __not_found; 1649 return NULL; 1650 } 1651 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { 1652 if (!strcmp(setup->task_name, ptrl)) { 1653 up(&pcm->streams[stream].oss.setup_mutex); 1654 return setup; 1655 } 1656 } 1657 __not_found: 1658 up(&pcm->streams[stream].oss.setup_mutex); 1659 return NULL; 1660 } 1661 1662 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 1663 struct snd_pcm_oss_setup *setup, 1664 int minor) 1665 { 1666 struct snd_pcm_runtime *runtime; 1667 1668 substream->oss.oss = 1; 1669 substream->oss.setup = setup; 1670 runtime = substream->runtime; 1671 runtime->oss.params = 1; 1672 runtime->oss.trigger = 1; 1673 runtime->oss.rate = 8000; 1674 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 1675 case SNDRV_MINOR_OSS_PCM_8: 1676 runtime->oss.format = AFMT_U8; 1677 break; 1678 case SNDRV_MINOR_OSS_PCM_16: 1679 runtime->oss.format = AFMT_S16_LE; 1680 break; 1681 default: 1682 runtime->oss.format = AFMT_MU_LAW; 1683 } 1684 runtime->oss.channels = 1; 1685 runtime->oss.fragshift = 0; 1686 runtime->oss.maxfrags = 0; 1687 runtime->oss.subdivision = 0; 1688 } 1689 1690 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 1691 { 1692 struct snd_pcm_runtime *runtime; 1693 runtime = substream->runtime; 1694 vfree(runtime->oss.buffer); 1695 snd_pcm_oss_plugin_clear(substream); 1696 substream->oss.file = NULL; 1697 substream->oss.oss = 0; 1698 } 1699 1700 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 1701 { 1702 int cidx; 1703 snd_assert(pcm_oss_file != NULL, return -ENXIO); 1704 for (cidx = 0; cidx < 2; ++cidx) { 1705 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 1706 struct snd_pcm_runtime *runtime; 1707 if (substream == NULL) 1708 continue; 1709 runtime = substream->runtime; 1710 1711 snd_pcm_stream_lock_irq(substream); 1712 if (snd_pcm_running(substream)) 1713 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1714 snd_pcm_stream_unlock_irq(substream); 1715 if (substream->ffile != NULL) { 1716 if (substream->ops->hw_free != NULL) 1717 substream->ops->hw_free(substream); 1718 substream->ops->close(substream); 1719 substream->ffile = NULL; 1720 } 1721 snd_pcm_oss_release_substream(substream); 1722 snd_pcm_release_substream(substream); 1723 } 1724 kfree(pcm_oss_file); 1725 return 0; 1726 } 1727 1728 static int snd_pcm_oss_open_file(struct file *file, 1729 struct snd_pcm *pcm, 1730 struct snd_pcm_oss_file **rpcm_oss_file, 1731 int minor, 1732 struct snd_pcm_oss_setup *psetup, 1733 struct snd_pcm_oss_setup *csetup) 1734 { 1735 int err = 0; 1736 struct snd_pcm_oss_file *pcm_oss_file; 1737 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1738 unsigned int f_mode = file->f_mode; 1739 1740 snd_assert(rpcm_oss_file != NULL, return -EINVAL); 1741 *rpcm_oss_file = NULL; 1742 1743 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 1744 if (pcm_oss_file == NULL) 1745 return -ENOMEM; 1746 1747 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 1748 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 1749 f_mode = FMODE_WRITE; 1750 if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) { 1751 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK, 1752 &psubstream)) < 0) { 1753 snd_pcm_oss_release_file(pcm_oss_file); 1754 return err; 1755 } 1756 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream; 1757 } 1758 if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) { 1759 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE, 1760 &csubstream)) < 0) { 1761 if (!(f_mode & FMODE_WRITE) || err != -ENODEV) { 1762 snd_pcm_oss_release_file(pcm_oss_file); 1763 return err; 1764 } else { 1765 csubstream = NULL; 1766 } 1767 } 1768 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream; 1769 } 1770 1771 if (psubstream == NULL && csubstream == NULL) { 1772 snd_pcm_oss_release_file(pcm_oss_file); 1773 return -EINVAL; 1774 } 1775 if (psubstream != NULL) { 1776 psubstream->oss.file = pcm_oss_file; 1777 err = snd_pcm_hw_constraints_init(psubstream); 1778 if (err < 0) { 1779 snd_printd("snd_pcm_hw_constraint_init failed\n"); 1780 snd_pcm_oss_release_file(pcm_oss_file); 1781 return err; 1782 } 1783 if ((err = psubstream->ops->open(psubstream)) < 0) { 1784 snd_pcm_oss_release_file(pcm_oss_file); 1785 return err; 1786 } 1787 psubstream->ffile = file; 1788 err = snd_pcm_hw_constraints_complete(psubstream); 1789 if (err < 0) { 1790 snd_printd("snd_pcm_hw_constraint_complete failed\n"); 1791 snd_pcm_oss_release_file(pcm_oss_file); 1792 return err; 1793 } 1794 snd_pcm_oss_init_substream(psubstream, psetup, minor); 1795 } 1796 if (csubstream != NULL) { 1797 csubstream->oss.file = pcm_oss_file; 1798 err = snd_pcm_hw_constraints_init(csubstream); 1799 if (err < 0) { 1800 snd_printd("snd_pcm_hw_constraint_init failed\n"); 1801 snd_pcm_oss_release_file(pcm_oss_file); 1802 return err; 1803 } 1804 if ((err = csubstream->ops->open(csubstream)) < 0) { 1805 snd_pcm_oss_release_file(pcm_oss_file); 1806 return err; 1807 } 1808 csubstream->ffile = file; 1809 err = snd_pcm_hw_constraints_complete(csubstream); 1810 if (err < 0) { 1811 snd_printd("snd_pcm_hw_constraint_complete failed\n"); 1812 snd_pcm_oss_release_file(pcm_oss_file); 1813 return err; 1814 } 1815 snd_pcm_oss_init_substream(csubstream, csetup, minor); 1816 } 1817 1818 file->private_data = pcm_oss_file; 1819 *rpcm_oss_file = pcm_oss_file; 1820 return 0; 1821 } 1822 1823 1824 static int snd_task_name(struct task_struct *task, char *name, size_t size) 1825 { 1826 unsigned int idx; 1827 1828 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL); 1829 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 1830 name[idx] = task->comm[idx]; 1831 name[idx] = '\0'; 1832 return 0; 1833 } 1834 1835 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 1836 { 1837 int err; 1838 char task_name[32]; 1839 struct snd_pcm *pcm; 1840 struct snd_pcm_oss_file *pcm_oss_file; 1841 struct snd_pcm_oss_setup *psetup = NULL, *csetup = NULL; 1842 int nonblock; 1843 wait_queue_t wait; 1844 1845 pcm = snd_lookup_oss_minor_data(iminor(inode), 1846 SNDRV_OSS_DEVICE_TYPE_PCM); 1847 if (pcm == NULL) { 1848 err = -ENODEV; 1849 goto __error1; 1850 } 1851 err = snd_card_file_add(pcm->card, file); 1852 if (err < 0) 1853 goto __error1; 1854 if (!try_module_get(pcm->card->module)) { 1855 err = -EFAULT; 1856 goto __error2; 1857 } 1858 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 1859 err = -EFAULT; 1860 goto __error; 1861 } 1862 if (file->f_mode & FMODE_WRITE) 1863 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name); 1864 if (file->f_mode & FMODE_READ) 1865 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name); 1866 1867 nonblock = !!(file->f_flags & O_NONBLOCK); 1868 if (psetup && !psetup->disable) { 1869 if (psetup->nonblock) 1870 nonblock = 1; 1871 else if (psetup->block) 1872 nonblock = 0; 1873 } else if (csetup && !csetup->disable) { 1874 if (csetup->nonblock) 1875 nonblock = 1; 1876 else if (csetup->block) 1877 nonblock = 0; 1878 } 1879 if (!nonblock) 1880 nonblock = nonblock_open; 1881 1882 init_waitqueue_entry(&wait, current); 1883 add_wait_queue(&pcm->open_wait, &wait); 1884 down(&pcm->open_mutex); 1885 while (1) { 1886 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 1887 iminor(inode), psetup, csetup); 1888 if (err >= 0) 1889 break; 1890 if (err == -EAGAIN) { 1891 if (nonblock) { 1892 err = -EBUSY; 1893 break; 1894 } 1895 } else 1896 break; 1897 set_current_state(TASK_INTERRUPTIBLE); 1898 up(&pcm->open_mutex); 1899 schedule(); 1900 down(&pcm->open_mutex); 1901 if (signal_pending(current)) { 1902 err = -ERESTARTSYS; 1903 break; 1904 } 1905 } 1906 remove_wait_queue(&pcm->open_wait, &wait); 1907 up(&pcm->open_mutex); 1908 if (err < 0) 1909 goto __error; 1910 return err; 1911 1912 __error: 1913 module_put(pcm->card->module); 1914 __error2: 1915 snd_card_file_remove(pcm->card, file); 1916 __error1: 1917 return err; 1918 } 1919 1920 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 1921 { 1922 struct snd_pcm *pcm; 1923 struct snd_pcm_substream *substream; 1924 struct snd_pcm_oss_file *pcm_oss_file; 1925 1926 pcm_oss_file = file->private_data; 1927 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1928 if (substream == NULL) 1929 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1930 snd_assert(substream != NULL, return -ENXIO); 1931 pcm = substream->pcm; 1932 snd_pcm_oss_sync(pcm_oss_file); 1933 down(&pcm->open_mutex); 1934 snd_pcm_oss_release_file(pcm_oss_file); 1935 up(&pcm->open_mutex); 1936 wake_up(&pcm->open_wait); 1937 module_put(pcm->card->module); 1938 snd_card_file_remove(pcm->card, file); 1939 return 0; 1940 } 1941 1942 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1943 { 1944 struct snd_pcm_oss_file *pcm_oss_file; 1945 int __user *p = (int __user *)arg; 1946 int res; 1947 1948 pcm_oss_file = file->private_data; 1949 if (cmd == OSS_GETVERSION) 1950 return put_user(SNDRV_OSS_VERSION, p); 1951 if (cmd == OSS_ALSAEMULVER) 1952 return put_user(1, p); 1953 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 1954 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 1955 struct snd_pcm_substream *substream; 1956 int idx; 1957 for (idx = 0; idx < 2; ++idx) { 1958 substream = pcm_oss_file->streams[idx]; 1959 if (substream != NULL) 1960 break; 1961 } 1962 snd_assert(substream != NULL, return -ENXIO); 1963 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 1964 } 1965 #endif 1966 if (((cmd >> 8) & 0xff) != 'P') 1967 return -EINVAL; 1968 #ifdef OSS_DEBUG 1969 printk("pcm_oss: ioctl = 0x%x\n", cmd); 1970 #endif 1971 switch (cmd) { 1972 case SNDCTL_DSP_RESET: 1973 return snd_pcm_oss_reset(pcm_oss_file); 1974 case SNDCTL_DSP_SYNC: 1975 return snd_pcm_oss_sync(pcm_oss_file); 1976 case SNDCTL_DSP_SPEED: 1977 if (get_user(res, p)) 1978 return -EFAULT; 1979 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 1980 return res; 1981 return put_user(res, p); 1982 case SOUND_PCM_READ_RATE: 1983 res = snd_pcm_oss_get_rate(pcm_oss_file); 1984 if (res < 0) 1985 return res; 1986 return put_user(res, p); 1987 case SNDCTL_DSP_STEREO: 1988 if (get_user(res, p)) 1989 return -EFAULT; 1990 res = res > 0 ? 2 : 1; 1991 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 1992 return res; 1993 return put_user(--res, p); 1994 case SNDCTL_DSP_GETBLKSIZE: 1995 res = snd_pcm_oss_get_block_size(pcm_oss_file); 1996 if (res < 0) 1997 return res; 1998 return put_user(res, p); 1999 case SNDCTL_DSP_SETFMT: 2000 if (get_user(res, p)) 2001 return -EFAULT; 2002 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2003 if (res < 0) 2004 return res; 2005 return put_user(res, p); 2006 case SOUND_PCM_READ_BITS: 2007 res = snd_pcm_oss_get_format(pcm_oss_file); 2008 if (res < 0) 2009 return res; 2010 return put_user(res, p); 2011 case SNDCTL_DSP_CHANNELS: 2012 if (get_user(res, p)) 2013 return -EFAULT; 2014 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2015 if (res < 0) 2016 return res; 2017 return put_user(res, p); 2018 case SOUND_PCM_READ_CHANNELS: 2019 res = snd_pcm_oss_get_channels(pcm_oss_file); 2020 if (res < 0) 2021 return res; 2022 return put_user(res, p); 2023 case SOUND_PCM_WRITE_FILTER: 2024 case SOUND_PCM_READ_FILTER: 2025 return -EIO; 2026 case SNDCTL_DSP_POST: 2027 return snd_pcm_oss_post(pcm_oss_file); 2028 case SNDCTL_DSP_SUBDIVIDE: 2029 if (get_user(res, p)) 2030 return -EFAULT; 2031 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2032 if (res < 0) 2033 return res; 2034 return put_user(res, p); 2035 case SNDCTL_DSP_SETFRAGMENT: 2036 if (get_user(res, p)) 2037 return -EFAULT; 2038 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2039 case SNDCTL_DSP_GETFMTS: 2040 res = snd_pcm_oss_get_formats(pcm_oss_file); 2041 if (res < 0) 2042 return res; 2043 return put_user(res, p); 2044 case SNDCTL_DSP_GETOSPACE: 2045 case SNDCTL_DSP_GETISPACE: 2046 return snd_pcm_oss_get_space(pcm_oss_file, 2047 cmd == SNDCTL_DSP_GETISPACE ? 2048 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2049 (struct audio_buf_info __user *) arg); 2050 case SNDCTL_DSP_NONBLOCK: 2051 return snd_pcm_oss_nonblock(file); 2052 case SNDCTL_DSP_GETCAPS: 2053 res = snd_pcm_oss_get_caps(pcm_oss_file); 2054 if (res < 0) 2055 return res; 2056 return put_user(res, p); 2057 case SNDCTL_DSP_GETTRIGGER: 2058 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2059 if (res < 0) 2060 return res; 2061 return put_user(res, p); 2062 case SNDCTL_DSP_SETTRIGGER: 2063 if (get_user(res, p)) 2064 return -EFAULT; 2065 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2066 case SNDCTL_DSP_GETIPTR: 2067 case SNDCTL_DSP_GETOPTR: 2068 return snd_pcm_oss_get_ptr(pcm_oss_file, 2069 cmd == SNDCTL_DSP_GETIPTR ? 2070 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2071 (struct count_info __user *) arg); 2072 case SNDCTL_DSP_MAPINBUF: 2073 case SNDCTL_DSP_MAPOUTBUF: 2074 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2075 cmd == SNDCTL_DSP_MAPINBUF ? 2076 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2077 (struct buffmem_desc __user *) arg); 2078 case SNDCTL_DSP_SETSYNCRO: 2079 /* stop DMA now.. */ 2080 return 0; 2081 case SNDCTL_DSP_SETDUPLEX: 2082 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2083 return 0; 2084 return -EIO; 2085 case SNDCTL_DSP_GETODELAY: 2086 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2087 if (res < 0) { 2088 /* it's for sure, some broken apps don't check for error codes */ 2089 put_user(0, p); 2090 return res; 2091 } 2092 return put_user(res, p); 2093 case SNDCTL_DSP_PROFILE: 2094 return 0; /* silently ignore */ 2095 default: 2096 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2097 } 2098 return -EINVAL; 2099 } 2100 2101 #ifdef CONFIG_COMPAT 2102 /* all compatible */ 2103 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2104 #else 2105 #define snd_pcm_oss_ioctl_compat NULL 2106 #endif 2107 2108 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2109 { 2110 struct snd_pcm_oss_file *pcm_oss_file; 2111 struct snd_pcm_substream *substream; 2112 2113 pcm_oss_file = file->private_data; 2114 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2115 if (substream == NULL) 2116 return -ENXIO; 2117 #ifndef OSS_DEBUG 2118 return snd_pcm_oss_read1(substream, buf, count); 2119 #else 2120 { 2121 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2122 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); 2123 return res; 2124 } 2125 #endif 2126 } 2127 2128 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2129 { 2130 struct snd_pcm_oss_file *pcm_oss_file; 2131 struct snd_pcm_substream *substream; 2132 long result; 2133 2134 pcm_oss_file = file->private_data; 2135 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2136 if (substream == NULL) 2137 return -ENXIO; 2138 result = snd_pcm_oss_write1(substream, buf, count); 2139 #ifdef OSS_DEBUG 2140 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); 2141 #endif 2142 return result; 2143 } 2144 2145 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2146 { 2147 struct snd_pcm_runtime *runtime = substream->runtime; 2148 if (atomic_read(&runtime->mmap_count)) 2149 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2150 else 2151 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; 2152 } 2153 2154 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2155 { 2156 struct snd_pcm_runtime *runtime = substream->runtime; 2157 if (atomic_read(&runtime->mmap_count)) 2158 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2159 else 2160 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; 2161 } 2162 2163 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2164 { 2165 struct snd_pcm_oss_file *pcm_oss_file; 2166 unsigned int mask; 2167 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2168 2169 pcm_oss_file = file->private_data; 2170 2171 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2172 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2173 2174 mask = 0; 2175 if (psubstream != NULL) { 2176 struct snd_pcm_runtime *runtime = psubstream->runtime; 2177 poll_wait(file, &runtime->sleep, wait); 2178 snd_pcm_stream_lock_irq(psubstream); 2179 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2180 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2181 snd_pcm_oss_playback_ready(psubstream))) 2182 mask |= POLLOUT | POLLWRNORM; 2183 snd_pcm_stream_unlock_irq(psubstream); 2184 } 2185 if (csubstream != NULL) { 2186 struct snd_pcm_runtime *runtime = csubstream->runtime; 2187 snd_pcm_state_t ostate; 2188 poll_wait(file, &runtime->sleep, wait); 2189 snd_pcm_stream_lock_irq(csubstream); 2190 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2191 snd_pcm_oss_capture_ready(csubstream)) 2192 mask |= POLLIN | POLLRDNORM; 2193 snd_pcm_stream_unlock_irq(csubstream); 2194 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2195 struct snd_pcm_oss_file ofile; 2196 memset(&ofile, 0, sizeof(ofile)); 2197 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2198 runtime->oss.trigger = 0; 2199 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2200 } 2201 } 2202 2203 return mask; 2204 } 2205 2206 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2207 { 2208 struct snd_pcm_oss_file *pcm_oss_file; 2209 struct snd_pcm_substream *substream = NULL; 2210 struct snd_pcm_runtime *runtime; 2211 int err; 2212 2213 #ifdef OSS_DEBUG 2214 printk("pcm_oss: mmap begin\n"); 2215 #endif 2216 pcm_oss_file = file->private_data; 2217 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2218 case VM_READ | VM_WRITE: 2219 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2220 if (substream) 2221 break; 2222 /* Fall through */ 2223 case VM_READ: 2224 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2225 break; 2226 case VM_WRITE: 2227 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2228 break; 2229 default: 2230 return -EINVAL; 2231 } 2232 /* set VM_READ access as well to fix memset() routines that do 2233 reads before writes (to improve performance) */ 2234 area->vm_flags |= VM_READ; 2235 if (substream == NULL) 2236 return -ENXIO; 2237 runtime = substream->runtime; 2238 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2239 return -EIO; 2240 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2241 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2242 else 2243 return -EIO; 2244 2245 if (runtime->oss.params) { 2246 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2247 return err; 2248 } 2249 if (runtime->oss.plugin_first != NULL) 2250 return -EIO; 2251 2252 if (area->vm_pgoff != 0) 2253 return -EINVAL; 2254 2255 err = snd_pcm_mmap_data(substream, file, area); 2256 if (err < 0) 2257 return err; 2258 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2259 runtime->silence_threshold = 0; 2260 runtime->silence_size = 0; 2261 #ifdef OSS_DEBUG 2262 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); 2263 #endif 2264 /* In mmap mode we never stop */ 2265 runtime->stop_threshold = runtime->boundary; 2266 2267 return 0; 2268 } 2269 2270 #ifdef CONFIG_PROC_FS 2271 /* 2272 * /proc interface 2273 */ 2274 2275 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2276 struct snd_info_buffer *buffer) 2277 { 2278 struct snd_pcm_str *pstr = entry->private_data; 2279 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2280 down(&pstr->oss.setup_mutex); 2281 while (setup) { 2282 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2283 setup->task_name, 2284 setup->periods, 2285 setup->period_size, 2286 setup->disable ? " disable" : "", 2287 setup->direct ? " direct" : "", 2288 setup->block ? " block" : "", 2289 setup->nonblock ? " non-block" : "", 2290 setup->partialfrag ? " partial-frag" : "", 2291 setup->nosilence ? " no-silence" : ""); 2292 setup = setup->next; 2293 } 2294 up(&pstr->oss.setup_mutex); 2295 } 2296 2297 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2298 { 2299 unsigned int idx; 2300 struct snd_pcm_substream *substream; 2301 struct snd_pcm_oss_setup *setup, *setupn; 2302 2303 for (idx = 0, substream = pstr->substream; 2304 idx < pstr->substream_count; idx++, substream = substream->next) 2305 substream->oss.setup = NULL; 2306 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2307 setup; setup = setupn) { 2308 setupn = setup->next; 2309 kfree(setup->task_name); 2310 kfree(setup); 2311 } 2312 pstr->oss.setup_list = NULL; 2313 } 2314 2315 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2316 struct snd_info_buffer *buffer) 2317 { 2318 struct snd_pcm_str *pstr = entry->private_data; 2319 char line[128], str[32], task_name[32], *ptr; 2320 int idx1; 2321 struct snd_pcm_oss_setup *setup, *setup1, template; 2322 2323 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2324 down(&pstr->oss.setup_mutex); 2325 memset(&template, 0, sizeof(template)); 2326 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2327 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2328 snd_pcm_oss_proc_free_setup_list(pstr); 2329 up(&pstr->oss.setup_mutex); 2330 continue; 2331 } 2332 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2333 if (!strcmp(setup->task_name, task_name)) { 2334 template = *setup; 2335 break; 2336 } 2337 } 2338 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2339 template.periods = simple_strtoul(str, NULL, 10); 2340 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2341 template.period_size = simple_strtoul(str, NULL, 10); 2342 for (idx1 = 31; idx1 >= 0; idx1--) 2343 if (template.period_size & (1 << idx1)) 2344 break; 2345 for (idx1--; idx1 >= 0; idx1--) 2346 template.period_size &= ~(1 << idx1); 2347 do { 2348 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2349 if (!strcmp(str, "disable")) { 2350 template.disable = 1; 2351 } else if (!strcmp(str, "direct")) { 2352 template.direct = 1; 2353 } else if (!strcmp(str, "block")) { 2354 template.block = 1; 2355 } else if (!strcmp(str, "non-block")) { 2356 template.nonblock = 1; 2357 } else if (!strcmp(str, "partial-frag")) { 2358 template.partialfrag = 1; 2359 } else if (!strcmp(str, "no-silence")) { 2360 template.nosilence = 1; 2361 } else if (!strcmp(str, "buggy-ptr")) { 2362 template.buggyptr = 1; 2363 } 2364 } while (*str); 2365 if (setup == NULL) { 2366 setup = kmalloc(sizeof(struct snd_pcm_oss_setup), GFP_KERNEL); 2367 if (setup) { 2368 if (pstr->oss.setup_list == NULL) { 2369 pstr->oss.setup_list = setup; 2370 } else { 2371 for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next); 2372 setup1->next = setup; 2373 } 2374 template.task_name = kstrdup(task_name, GFP_KERNEL); 2375 } else { 2376 buffer->error = -ENOMEM; 2377 } 2378 } 2379 if (setup) 2380 *setup = template; 2381 up(&pstr->oss.setup_mutex); 2382 } 2383 } 2384 2385 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2386 { 2387 int stream; 2388 for (stream = 0; stream < 2; ++stream) { 2389 struct snd_info_entry *entry; 2390 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2391 if (pstr->substream_count == 0) 2392 continue; 2393 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2394 entry->content = SNDRV_INFO_CONTENT_TEXT; 2395 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2396 entry->c.text.read_size = 8192; 2397 entry->c.text.read = snd_pcm_oss_proc_read; 2398 entry->c.text.write_size = 8192; 2399 entry->c.text.write = snd_pcm_oss_proc_write; 2400 entry->private_data = pstr; 2401 if (snd_info_register(entry) < 0) { 2402 snd_info_free_entry(entry); 2403 entry = NULL; 2404 } 2405 } 2406 pstr->oss.proc_entry = entry; 2407 } 2408 } 2409 2410 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2411 { 2412 int stream; 2413 for (stream = 0; stream < 2; ++stream) { 2414 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2415 if (pstr->oss.proc_entry) { 2416 snd_info_unregister(pstr->oss.proc_entry); 2417 pstr->oss.proc_entry = NULL; 2418 snd_pcm_oss_proc_free_setup_list(pstr); 2419 } 2420 } 2421 } 2422 #else /* !CONFIG_PROC_FS */ 2423 #define snd_pcm_oss_proc_init(pcm) 2424 #define snd_pcm_oss_proc_done(pcm) 2425 #endif /* CONFIG_PROC_FS */ 2426 2427 /* 2428 * ENTRY functions 2429 */ 2430 2431 static struct file_operations snd_pcm_oss_f_reg = 2432 { 2433 .owner = THIS_MODULE, 2434 .read = snd_pcm_oss_read, 2435 .write = snd_pcm_oss_write, 2436 .open = snd_pcm_oss_open, 2437 .release = snd_pcm_oss_release, 2438 .poll = snd_pcm_oss_poll, 2439 .unlocked_ioctl = snd_pcm_oss_ioctl, 2440 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2441 .mmap = snd_pcm_oss_mmap, 2442 }; 2443 2444 static void register_oss_dsp(struct snd_pcm *pcm, int index) 2445 { 2446 char name[128]; 2447 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2448 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2449 pcm->card, index, &snd_pcm_oss_f_reg, 2450 pcm, name) < 0) { 2451 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 2452 pcm->card->number, pcm->device); 2453 } 2454 } 2455 2456 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 2457 { 2458 pcm->oss.reg = 0; 2459 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2460 char name[128]; 2461 int duplex; 2462 register_oss_dsp(pcm, 0); 2463 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2464 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2465 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2466 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2467 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2468 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2469 pcm->card->number, 2470 name); 2471 #endif 2472 pcm->oss.reg++; 2473 pcm->oss.reg_mask |= 1; 2474 } 2475 if (adsp_map[pcm->card->number] == (int)pcm->device) { 2476 register_oss_dsp(pcm, 1); 2477 pcm->oss.reg++; 2478 pcm->oss.reg_mask |= 2; 2479 } 2480 2481 if (pcm->oss.reg) 2482 snd_pcm_oss_proc_init(pcm); 2483 2484 return 0; 2485 } 2486 2487 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 2488 { 2489 if (pcm->oss.reg) { 2490 if (pcm->oss.reg_mask & 1) { 2491 pcm->oss.reg_mask &= ~1; 2492 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2493 pcm->card, 0); 2494 } 2495 if (pcm->oss.reg_mask & 2) { 2496 pcm->oss.reg_mask &= ~2; 2497 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2498 pcm->card, 1); 2499 } 2500 } 2501 return 0; 2502 } 2503 2504 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 2505 { 2506 snd_pcm_oss_disconnect_minor(pcm); 2507 if (pcm->oss.reg) { 2508 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2509 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2510 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 2511 #endif 2512 } 2513 pcm->oss.reg = 0; 2514 snd_pcm_oss_proc_done(pcm); 2515 } 2516 return 0; 2517 } 2518 2519 static struct snd_pcm_notify snd_pcm_oss_notify = 2520 { 2521 .n_register = snd_pcm_oss_register_minor, 2522 .n_disconnect = snd_pcm_oss_disconnect_minor, 2523 .n_unregister = snd_pcm_oss_unregister_minor, 2524 }; 2525 2526 static int __init alsa_pcm_oss_init(void) 2527 { 2528 int i; 2529 int err; 2530 2531 /* check device map table */ 2532 for (i = 0; i < SNDRV_CARDS; i++) { 2533 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 2534 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 2535 i, dsp_map[i]); 2536 dsp_map[i] = 0; 2537 } 2538 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 2539 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 2540 i, adsp_map[i]); 2541 adsp_map[i] = 1; 2542 } 2543 } 2544 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 2545 return err; 2546 return 0; 2547 } 2548 2549 static void __exit alsa_pcm_oss_exit(void) 2550 { 2551 snd_pcm_notify(&snd_pcm_oss_notify, 1); 2552 } 2553 2554 module_init(alsa_pcm_oss_init) 2555 module_exit(alsa_pcm_oss_exit) 2556