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(snd_card_t *card, unsigned int cmd, unsigned long arg); 65 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file); 66 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file); 67 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *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(snd_pcm_substream_t *substream) 82 { 83 snd_pcm_runtime_t *runtime = substream->runtime; 84 snd_pcm_plugin_t *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(snd_pcm_plugin_t *plugin) 97 { 98 snd_pcm_runtime_t *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(snd_pcm_plugin_t *plugin) 112 { 113 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, long frames) 127 { 128 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, long bytes) 146 { 147 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, 189 snd_pcm_hw_params_t *oss_params, 190 snd_pcm_hw_params_t *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 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, 281 snd_pcm_hw_params_t *params, unsigned int best_rate) 282 { 283 snd_interval_t *it; 284 snd_pcm_hw_params_t *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(snd_pcm_substream_t *substream) 321 { 322 snd_pcm_runtime_t *runtime = substream->runtime; 323 snd_pcm_hw_params_t *params, *sparams; 324 snd_pcm_sw_params_t *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 snd_mask_t sformat_mask; 331 snd_mask_t 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 snd_pcm_oss_setup_t *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 snd_pcm_plugin_t *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(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream) 544 { 545 int idx, err; 546 snd_pcm_substream_t *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(snd_pcm_substream_t *substream) 567 { 568 int err; 569 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream) 585 { 586 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay) 606 { 607 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 631 { 632 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 666 { 667 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 713 { 714 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 749 { 750 snd_pcm_runtime_t *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(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel) 784 { 785 snd_pcm_runtime_t *runtime = substream->runtime; 786 snd_pcm_sframes_t frames, frames1; 787 if (runtime->oss.plugin_first) { 788 snd_pcm_plugin_channel_t *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(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes) 814 { 815 size_t xfer = 0; 816 ssize_t tmp; 817 snd_pcm_runtime_t *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, (const char *)buf, runtime->oss.period_bytes, 0); 854 if (tmp <= 0) 855 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 856 runtime->oss.bytes += tmp; 857 buf += tmp; 858 bytes -= tmp; 859 xfer += tmp; 860 if ((substream->ffile->f_flags & O_NONBLOCK) != 0 && 861 tmp != runtime->oss.period_bytes) 862 break; 863 } 864 } 865 return xfer; 866 } 867 868 static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel) 869 { 870 snd_pcm_runtime_t *runtime = substream->runtime; 871 snd_pcm_sframes_t frames, frames1; 872 char __user *final_dst = (char __user *)buf; 873 if (runtime->oss.plugin_first) { 874 snd_pcm_plugin_channel_t *channels; 875 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 876 if (!in_kernel) 877 buf = runtime->oss.buffer; 878 frames = bytes / oss_frame_bytes; 879 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 880 if (frames1 < 0) 881 return frames1; 882 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 883 if (frames1 <= 0) 884 return frames1; 885 bytes = frames1 * oss_frame_bytes; 886 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 887 return -EFAULT; 888 } else { 889 frames = bytes_to_frames(runtime, bytes); 890 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 891 if (frames1 <= 0) 892 return frames1; 893 bytes = frames_to_bytes(runtime, frames1); 894 } 895 return bytes; 896 } 897 898 static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes) 899 { 900 size_t xfer = 0; 901 ssize_t tmp; 902 snd_pcm_runtime_t *runtime = substream->runtime; 903 904 if (atomic_read(&runtime->mmap_count)) 905 return -ENXIO; 906 907 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 908 return tmp; 909 while (bytes > 0) { 910 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 911 if (runtime->oss.buffer_used == 0) { 912 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 913 if (tmp <= 0) 914 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 915 runtime->oss.bytes += tmp; 916 runtime->oss.period_ptr = tmp; 917 runtime->oss.buffer_used = tmp; 918 } 919 tmp = bytes; 920 if ((size_t) tmp > runtime->oss.buffer_used) 921 tmp = runtime->oss.buffer_used; 922 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) 923 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT; 924 buf += tmp; 925 bytes -= tmp; 926 xfer += tmp; 927 runtime->oss.buffer_used -= tmp; 928 } else { 929 tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0); 930 if (tmp <= 0) 931 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 932 runtime->oss.bytes += tmp; 933 buf += tmp; 934 bytes -= tmp; 935 xfer += tmp; 936 } 937 } 938 return xfer; 939 } 940 941 static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file) 942 { 943 snd_pcm_substream_t *substream; 944 945 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 946 if (substream != NULL) { 947 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 948 substream->runtime->oss.prepare = 1; 949 } 950 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 951 if (substream != NULL) { 952 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 953 substream->runtime->oss.prepare = 1; 954 } 955 return 0; 956 } 957 958 static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file) 959 { 960 snd_pcm_substream_t *substream; 961 int err; 962 963 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 964 if (substream != NULL) { 965 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 966 return err; 967 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 968 } 969 /* note: all errors from the start action are ignored */ 970 /* OSS apps do not know, how to handle them */ 971 return 0; 972 } 973 974 static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size) 975 { 976 snd_pcm_runtime_t *runtime; 977 ssize_t result = 0; 978 long res; 979 wait_queue_t wait; 980 981 runtime = substream->runtime; 982 init_waitqueue_entry(&wait, current); 983 add_wait_queue(&runtime->sleep, &wait); 984 #ifdef OSS_DEBUG 985 printk("sync1: size = %li\n", size); 986 #endif 987 while (1) { 988 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 989 if (result > 0) { 990 runtime->oss.buffer_used = 0; 991 result = 0; 992 break; 993 } 994 if (result != 0 && result != -EAGAIN) 995 break; 996 result = 0; 997 set_current_state(TASK_INTERRUPTIBLE); 998 snd_pcm_stream_lock_irq(substream); 999 res = runtime->status->state; 1000 snd_pcm_stream_unlock_irq(substream); 1001 if (res != SNDRV_PCM_STATE_RUNNING) { 1002 set_current_state(TASK_RUNNING); 1003 break; 1004 } 1005 res = schedule_timeout(10 * HZ); 1006 if (signal_pending(current)) { 1007 result = -ERESTARTSYS; 1008 break; 1009 } 1010 if (res == 0) { 1011 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1012 result = -EIO; 1013 break; 1014 } 1015 } 1016 remove_wait_queue(&runtime->sleep, &wait); 1017 return result; 1018 } 1019 1020 static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file) 1021 { 1022 int err = 0; 1023 unsigned int saved_f_flags; 1024 snd_pcm_substream_t *substream; 1025 snd_pcm_runtime_t *runtime; 1026 snd_pcm_format_t format; 1027 unsigned long width; 1028 size_t size; 1029 1030 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1031 if (substream != NULL) { 1032 runtime = substream->runtime; 1033 if (atomic_read(&runtime->mmap_count)) 1034 goto __direct; 1035 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1036 return err; 1037 format = snd_pcm_oss_format_from(runtime->oss.format); 1038 width = snd_pcm_format_physical_width(format); 1039 if (runtime->oss.buffer_used > 0) { 1040 #ifdef OSS_DEBUG 1041 printk("sync: buffer_used\n"); 1042 #endif 1043 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1044 snd_pcm_format_set_silence(format, 1045 runtime->oss.buffer + runtime->oss.buffer_used, 1046 size); 1047 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1048 if (err < 0) 1049 return err; 1050 } else if (runtime->oss.period_ptr > 0) { 1051 #ifdef OSS_DEBUG 1052 printk("sync: period_ptr\n"); 1053 #endif 1054 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1055 snd_pcm_format_set_silence(format, 1056 runtime->oss.buffer, 1057 size * 8 / width); 1058 err = snd_pcm_oss_sync1(substream, size); 1059 if (err < 0) 1060 return err; 1061 } 1062 /* 1063 * The ALSA's period might be a bit large than OSS one. 1064 * Fill the remain portion of ALSA period with zeros. 1065 */ 1066 size = runtime->control->appl_ptr % runtime->period_size; 1067 if (size > 0) { 1068 size = runtime->period_size - size; 1069 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1070 size = (runtime->frame_bits * size) / 8; 1071 while (size > 0) { 1072 mm_segment_t fs; 1073 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1074 size -= size1; 1075 size1 *= 8; 1076 size1 /= runtime->sample_bits; 1077 snd_pcm_format_set_silence(runtime->format, 1078 runtime->oss.buffer, 1079 size1); 1080 fs = snd_enter_user(); 1081 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1082 snd_leave_user(fs); 1083 } 1084 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1085 void __user *buffers[runtime->channels]; 1086 memset(buffers, 0, runtime->channels * sizeof(void *)); 1087 snd_pcm_lib_writev(substream, buffers, size); 1088 } 1089 } 1090 /* 1091 * finish sync: drain the buffer 1092 */ 1093 __direct: 1094 saved_f_flags = substream->ffile->f_flags; 1095 substream->ffile->f_flags &= ~O_NONBLOCK; 1096 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1097 substream->ffile->f_flags = saved_f_flags; 1098 if (err < 0) 1099 return err; 1100 runtime->oss.prepare = 1; 1101 } 1102 1103 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1104 if (substream != NULL) { 1105 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1106 return err; 1107 runtime = substream->runtime; 1108 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1109 if (err < 0) 1110 return err; 1111 runtime->oss.buffer_used = 0; 1112 runtime->oss.prepare = 1; 1113 } 1114 return 0; 1115 } 1116 1117 static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate) 1118 { 1119 int idx; 1120 1121 for (idx = 1; idx >= 0; --idx) { 1122 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; 1123 snd_pcm_runtime_t *runtime; 1124 if (substream == NULL) 1125 continue; 1126 runtime = substream->runtime; 1127 if (rate < 1000) 1128 rate = 1000; 1129 else if (rate > 192000) 1130 rate = 192000; 1131 if (runtime->oss.rate != rate) { 1132 runtime->oss.params = 1; 1133 runtime->oss.rate = rate; 1134 } 1135 } 1136 return snd_pcm_oss_get_rate(pcm_oss_file); 1137 } 1138 1139 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file) 1140 { 1141 snd_pcm_substream_t *substream; 1142 int err; 1143 1144 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1145 return err; 1146 return substream->runtime->oss.rate; 1147 } 1148 1149 static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels) 1150 { 1151 int idx; 1152 if (channels < 1) 1153 channels = 1; 1154 if (channels > 128) 1155 return -EINVAL; 1156 for (idx = 1; idx >= 0; --idx) { 1157 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; 1158 snd_pcm_runtime_t *runtime; 1159 if (substream == NULL) 1160 continue; 1161 runtime = substream->runtime; 1162 if (runtime->oss.channels != channels) { 1163 runtime->oss.params = 1; 1164 runtime->oss.channels = channels; 1165 } 1166 } 1167 return snd_pcm_oss_get_channels(pcm_oss_file); 1168 } 1169 1170 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file) 1171 { 1172 snd_pcm_substream_t *substream; 1173 int err; 1174 1175 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1176 return err; 1177 return substream->runtime->oss.channels; 1178 } 1179 1180 static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file) 1181 { 1182 snd_pcm_substream_t *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.period_bytes; 1188 } 1189 1190 static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file) 1191 { 1192 snd_pcm_substream_t *substream; 1193 int err; 1194 int direct; 1195 snd_pcm_hw_params_t *params; 1196 unsigned int formats = 0; 1197 snd_mask_t format_mask; 1198 int fmt; 1199 1200 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1201 return err; 1202 if (atomic_read(&substream->runtime->mmap_count)) { 1203 direct = 1; 1204 } else { 1205 snd_pcm_oss_setup_t *setup = substream->oss.setup; 1206 direct = (setup != NULL && setup->direct); 1207 } 1208 if (!direct) 1209 return AFMT_MU_LAW | AFMT_U8 | 1210 AFMT_S16_LE | AFMT_S16_BE | 1211 AFMT_S8 | AFMT_U16_LE | 1212 AFMT_U16_BE; 1213 params = kmalloc(sizeof(*params), GFP_KERNEL); 1214 if (!params) 1215 return -ENOMEM; 1216 _snd_pcm_hw_params_any(params); 1217 err = snd_pcm_hw_refine(substream, params); 1218 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1219 kfree(params); 1220 snd_assert(err >= 0, return err); 1221 for (fmt = 0; fmt < 32; ++fmt) { 1222 if (snd_mask_test(&format_mask, fmt)) { 1223 int f = snd_pcm_oss_format_to(fmt); 1224 if (f >= 0) 1225 formats |= f; 1226 } 1227 } 1228 return formats; 1229 } 1230 1231 static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format) 1232 { 1233 int formats, idx; 1234 1235 if (format != AFMT_QUERY) { 1236 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1237 if (!(formats & format)) 1238 format = AFMT_U8; 1239 for (idx = 1; idx >= 0; --idx) { 1240 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; 1241 snd_pcm_runtime_t *runtime; 1242 if (substream == NULL) 1243 continue; 1244 runtime = substream->runtime; 1245 if (runtime->oss.format != format) { 1246 runtime->oss.params = 1; 1247 runtime->oss.format = format; 1248 } 1249 } 1250 } 1251 return snd_pcm_oss_get_format(pcm_oss_file); 1252 } 1253 1254 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file) 1255 { 1256 snd_pcm_substream_t *substream; 1257 int err; 1258 1259 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1260 return err; 1261 return substream->runtime->oss.format; 1262 } 1263 1264 static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide) 1265 { 1266 snd_pcm_runtime_t *runtime; 1267 1268 if (substream == NULL) 1269 return 0; 1270 runtime = substream->runtime; 1271 if (subdivide == 0) { 1272 subdivide = runtime->oss.subdivision; 1273 if (subdivide == 0) 1274 subdivide = 1; 1275 return subdivide; 1276 } 1277 if (runtime->oss.subdivision || runtime->oss.fragshift) 1278 return -EINVAL; 1279 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1280 subdivide != 8 && subdivide != 16) 1281 return -EINVAL; 1282 runtime->oss.subdivision = subdivide; 1283 runtime->oss.params = 1; 1284 return subdivide; 1285 } 1286 1287 static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide) 1288 { 1289 int err = -EINVAL, idx; 1290 1291 for (idx = 1; idx >= 0; --idx) { 1292 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; 1293 if (substream == NULL) 1294 continue; 1295 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1296 return err; 1297 } 1298 return err; 1299 } 1300 1301 static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val) 1302 { 1303 snd_pcm_runtime_t *runtime; 1304 1305 if (substream == NULL) 1306 return 0; 1307 runtime = substream->runtime; 1308 if (runtime->oss.subdivision || runtime->oss.fragshift) 1309 return -EINVAL; 1310 runtime->oss.fragshift = val & 0xffff; 1311 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1312 if (runtime->oss.fragshift < 4) /* < 16 */ 1313 runtime->oss.fragshift = 4; 1314 if (runtime->oss.maxfrags < 2) 1315 runtime->oss.maxfrags = 2; 1316 runtime->oss.params = 1; 1317 return 0; 1318 } 1319 1320 static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val) 1321 { 1322 int err = -EINVAL, idx; 1323 1324 for (idx = 1; idx >= 0; --idx) { 1325 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; 1326 if (substream == NULL) 1327 continue; 1328 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1329 return err; 1330 } 1331 return err; 1332 } 1333 1334 static int snd_pcm_oss_nonblock(struct file * file) 1335 { 1336 file->f_flags |= O_NONBLOCK; 1337 return 0; 1338 } 1339 1340 static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res) 1341 { 1342 1343 if (substream == NULL) { 1344 res &= ~DSP_CAP_DUPLEX; 1345 return res; 1346 } 1347 #ifdef DSP_CAP_MULTI 1348 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1349 if (substream->pstr->substream_count > 1) 1350 res |= DSP_CAP_MULTI; 1351 #endif 1352 /* DSP_CAP_REALTIME is set all times: */ 1353 /* all ALSA drivers can return actual pointer in ring buffer */ 1354 #if defined(DSP_CAP_REALTIME) && 0 1355 { 1356 snd_pcm_runtime_t *runtime = substream->runtime; 1357 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1358 res &= ~DSP_CAP_REALTIME; 1359 } 1360 #endif 1361 return res; 1362 } 1363 1364 static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file) 1365 { 1366 int result, idx; 1367 1368 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1369 for (idx = 0; idx < 2; idx++) { 1370 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; 1371 result = snd_pcm_oss_get_caps1(substream, result); 1372 } 1373 result |= 0x0001; /* revision - same as SB AWE 64 */ 1374 return result; 1375 } 1376 1377 static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr) 1378 { 1379 snd_pcm_runtime_t *runtime = substream->runtime; 1380 snd_pcm_uframes_t appl_ptr; 1381 appl_ptr = hw_ptr + runtime->buffer_size; 1382 appl_ptr %= runtime->boundary; 1383 runtime->control->appl_ptr = appl_ptr; 1384 } 1385 1386 static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger) 1387 { 1388 snd_pcm_runtime_t *runtime; 1389 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; 1390 int err, cmd; 1391 1392 #ifdef OSS_DEBUG 1393 printk("pcm_oss: trigger = 0x%x\n", trigger); 1394 #endif 1395 1396 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1397 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1398 1399 if (psubstream) { 1400 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1401 return err; 1402 } 1403 if (csubstream) { 1404 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1405 return err; 1406 } 1407 if (psubstream) { 1408 runtime = psubstream->runtime; 1409 if (trigger & PCM_ENABLE_OUTPUT) { 1410 if (runtime->oss.trigger) 1411 goto _skip1; 1412 if (atomic_read(&psubstream->runtime->mmap_count)) 1413 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); 1414 runtime->oss.trigger = 1; 1415 runtime->start_threshold = 1; 1416 cmd = SNDRV_PCM_IOCTL_START; 1417 } else { 1418 if (!runtime->oss.trigger) 1419 goto _skip1; 1420 runtime->oss.trigger = 0; 1421 runtime->start_threshold = runtime->boundary; 1422 cmd = SNDRV_PCM_IOCTL_DROP; 1423 runtime->oss.prepare = 1; 1424 } 1425 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL); 1426 if (err < 0) 1427 return err; 1428 } 1429 _skip1: 1430 if (csubstream) { 1431 runtime = csubstream->runtime; 1432 if (trigger & PCM_ENABLE_INPUT) { 1433 if (runtime->oss.trigger) 1434 goto _skip2; 1435 runtime->oss.trigger = 1; 1436 runtime->start_threshold = 1; 1437 cmd = SNDRV_PCM_IOCTL_START; 1438 } else { 1439 if (!runtime->oss.trigger) 1440 goto _skip2; 1441 runtime->oss.trigger = 0; 1442 runtime->start_threshold = runtime->boundary; 1443 cmd = SNDRV_PCM_IOCTL_DROP; 1444 runtime->oss.prepare = 1; 1445 } 1446 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL); 1447 if (err < 0) 1448 return err; 1449 } 1450 _skip2: 1451 return 0; 1452 } 1453 1454 static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file) 1455 { 1456 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; 1457 int result = 0; 1458 1459 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1460 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1461 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 1462 result |= PCM_ENABLE_OUTPUT; 1463 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 1464 result |= PCM_ENABLE_INPUT; 1465 return result; 1466 } 1467 1468 static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file) 1469 { 1470 snd_pcm_substream_t *substream; 1471 snd_pcm_runtime_t *runtime; 1472 snd_pcm_sframes_t delay; 1473 int err; 1474 1475 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1476 if (substream == NULL) 1477 return -EINVAL; 1478 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1479 return err; 1480 runtime = substream->runtime; 1481 if (runtime->oss.params || runtime->oss.prepare) 1482 return 0; 1483 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 1484 if (err == -EPIPE) 1485 delay = 0; /* hack for broken OSS applications */ 1486 else if (err < 0) 1487 return err; 1488 return snd_pcm_oss_bytes(substream, delay); 1489 } 1490 1491 static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info) 1492 { 1493 snd_pcm_substream_t *substream; 1494 snd_pcm_runtime_t *runtime; 1495 snd_pcm_sframes_t delay; 1496 int fixup; 1497 struct count_info info; 1498 int err; 1499 1500 if (_info == NULL) 1501 return -EFAULT; 1502 substream = pcm_oss_file->streams[stream]; 1503 if (substream == NULL) 1504 return -EINVAL; 1505 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1506 return err; 1507 runtime = substream->runtime; 1508 if (runtime->oss.params || runtime->oss.prepare) { 1509 memset(&info, 0, sizeof(info)); 1510 if (copy_to_user(_info, &info, sizeof(info))) 1511 return -EFAULT; 1512 return 0; 1513 } 1514 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1515 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 1516 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 1517 err = 0; 1518 delay = 0; 1519 fixup = 0; 1520 } else { 1521 fixup = runtime->oss.buffer_used; 1522 } 1523 } else { 1524 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 1525 fixup = -runtime->oss.buffer_used; 1526 } 1527 if (err < 0) 1528 return err; 1529 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 1530 if (atomic_read(&runtime->mmap_count)) { 1531 snd_pcm_sframes_t n; 1532 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; 1533 if (n < 0) 1534 n += runtime->boundary; 1535 info.blocks = n / runtime->period_size; 1536 runtime->oss.prev_hw_ptr_interrupt = delay; 1537 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1538 snd_pcm_oss_simulate_fill(substream, delay); 1539 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 1540 } else { 1541 delay = snd_pcm_oss_bytes(substream, delay); 1542 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1543 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 1544 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 1545 } else { 1546 delay += fixup; 1547 info.blocks = delay / runtime->oss.period_bytes; 1548 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 1549 } 1550 } 1551 if (copy_to_user(_info, &info, sizeof(info))) 1552 return -EFAULT; 1553 return 0; 1554 } 1555 1556 static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 1557 { 1558 snd_pcm_substream_t *substream; 1559 snd_pcm_runtime_t *runtime; 1560 snd_pcm_sframes_t avail; 1561 int fixup; 1562 struct audio_buf_info info; 1563 int err; 1564 1565 if (_info == NULL) 1566 return -EFAULT; 1567 substream = pcm_oss_file->streams[stream]; 1568 if (substream == NULL) 1569 return -EINVAL; 1570 runtime = substream->runtime; 1571 1572 if (runtime->oss.params && 1573 (err = snd_pcm_oss_change_params(substream)) < 0) 1574 return err; 1575 1576 info.fragsize = runtime->oss.period_bytes; 1577 info.fragstotal = runtime->periods; 1578 if (runtime->oss.prepare) { 1579 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1580 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 1581 info.fragments = runtime->oss.periods; 1582 } else { 1583 info.bytes = 0; 1584 info.fragments = 0; 1585 } 1586 } else { 1587 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1588 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 1589 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 1590 avail = runtime->buffer_size; 1591 err = 0; 1592 fixup = 0; 1593 } else { 1594 avail = runtime->buffer_size - avail; 1595 fixup = -runtime->oss.buffer_used; 1596 } 1597 } else { 1598 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 1599 fixup = runtime->oss.buffer_used; 1600 } 1601 if (err < 0) 1602 return err; 1603 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 1604 info.fragments = info.bytes / runtime->oss.period_bytes; 1605 } 1606 1607 #ifdef OSS_DEBUG 1608 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); 1609 #endif 1610 if (copy_to_user(_info, &info, sizeof(info))) 1611 return -EFAULT; 1612 return 0; 1613 } 1614 1615 static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 1616 { 1617 // it won't be probably implemented 1618 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 1619 return -EINVAL; 1620 } 1621 1622 static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name) 1623 { 1624 const char *ptr, *ptrl; 1625 snd_pcm_oss_setup_t *setup; 1626 1627 down(&pcm->streams[stream].oss.setup_mutex); 1628 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { 1629 if (!strcmp(setup->task_name, task_name)) { 1630 up(&pcm->streams[stream].oss.setup_mutex); 1631 return setup; 1632 } 1633 } 1634 ptr = ptrl = task_name; 1635 while (*ptr) { 1636 if (*ptr == '/') 1637 ptrl = ptr + 1; 1638 ptr++; 1639 } 1640 if (ptrl == task_name) { 1641 goto __not_found; 1642 return NULL; 1643 } 1644 for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { 1645 if (!strcmp(setup->task_name, ptrl)) { 1646 up(&pcm->streams[stream].oss.setup_mutex); 1647 return setup; 1648 } 1649 } 1650 __not_found: 1651 up(&pcm->streams[stream].oss.setup_mutex); 1652 return NULL; 1653 } 1654 1655 static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream, 1656 snd_pcm_oss_setup_t *setup, 1657 int minor) 1658 { 1659 snd_pcm_runtime_t *runtime; 1660 1661 substream->oss.oss = 1; 1662 substream->oss.setup = setup; 1663 runtime = substream->runtime; 1664 runtime->oss.params = 1; 1665 runtime->oss.trigger = 1; 1666 runtime->oss.rate = 8000; 1667 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 1668 case SNDRV_MINOR_OSS_PCM_8: 1669 runtime->oss.format = AFMT_U8; 1670 break; 1671 case SNDRV_MINOR_OSS_PCM_16: 1672 runtime->oss.format = AFMT_S16_LE; 1673 break; 1674 default: 1675 runtime->oss.format = AFMT_MU_LAW; 1676 } 1677 runtime->oss.channels = 1; 1678 runtime->oss.fragshift = 0; 1679 runtime->oss.maxfrags = 0; 1680 runtime->oss.subdivision = 0; 1681 } 1682 1683 static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream) 1684 { 1685 snd_pcm_runtime_t *runtime; 1686 runtime = substream->runtime; 1687 vfree(runtime->oss.buffer); 1688 snd_pcm_oss_plugin_clear(substream); 1689 substream->oss.file = NULL; 1690 substream->oss.oss = 0; 1691 } 1692 1693 static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file) 1694 { 1695 int cidx; 1696 snd_assert(pcm_oss_file != NULL, return -ENXIO); 1697 for (cidx = 0; cidx < 2; ++cidx) { 1698 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx]; 1699 snd_pcm_runtime_t *runtime; 1700 if (substream == NULL) 1701 continue; 1702 runtime = substream->runtime; 1703 1704 snd_pcm_stream_lock_irq(substream); 1705 if (snd_pcm_running(substream)) 1706 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1707 snd_pcm_stream_unlock_irq(substream); 1708 if (substream->ffile != NULL) { 1709 if (substream->ops->hw_free != NULL) 1710 substream->ops->hw_free(substream); 1711 substream->ops->close(substream); 1712 substream->ffile = NULL; 1713 } 1714 snd_pcm_oss_release_substream(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 snd_pcm_t *pcm, 1723 snd_pcm_oss_file_t **rpcm_oss_file, 1724 int minor, 1725 snd_pcm_oss_setup_t *psetup, 1726 snd_pcm_oss_setup_t *csetup) 1727 { 1728 int err = 0; 1729 snd_pcm_oss_file_t *pcm_oss_file; 1730 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; 1731 unsigned int f_mode = file->f_mode; 1732 1733 snd_assert(rpcm_oss_file != NULL, return -EINVAL); 1734 *rpcm_oss_file = NULL; 1735 1736 pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL); 1737 if (pcm_oss_file == NULL) 1738 return -ENOMEM; 1739 1740 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 1741 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 1742 f_mode = FMODE_WRITE; 1743 if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) { 1744 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK, 1745 &psubstream)) < 0) { 1746 snd_pcm_oss_release_file(pcm_oss_file); 1747 return err; 1748 } 1749 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream; 1750 } 1751 if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) { 1752 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE, 1753 &csubstream)) < 0) { 1754 if (!(f_mode & FMODE_WRITE) || err != -ENODEV) { 1755 snd_pcm_oss_release_file(pcm_oss_file); 1756 return err; 1757 } else { 1758 csubstream = NULL; 1759 } 1760 } 1761 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream; 1762 } 1763 1764 if (psubstream == NULL && csubstream == NULL) { 1765 snd_pcm_oss_release_file(pcm_oss_file); 1766 return -EINVAL; 1767 } 1768 if (psubstream != NULL) { 1769 psubstream->oss.file = pcm_oss_file; 1770 err = snd_pcm_hw_constraints_init(psubstream); 1771 if (err < 0) { 1772 snd_printd("snd_pcm_hw_constraint_init failed\n"); 1773 snd_pcm_oss_release_file(pcm_oss_file); 1774 return err; 1775 } 1776 if ((err = psubstream->ops->open(psubstream)) < 0) { 1777 snd_pcm_oss_release_file(pcm_oss_file); 1778 return err; 1779 } 1780 psubstream->ffile = file; 1781 err = snd_pcm_hw_constraints_complete(psubstream); 1782 if (err < 0) { 1783 snd_printd("snd_pcm_hw_constraint_complete failed\n"); 1784 snd_pcm_oss_release_file(pcm_oss_file); 1785 return err; 1786 } 1787 snd_pcm_oss_init_substream(psubstream, psetup, minor); 1788 } 1789 if (csubstream != NULL) { 1790 csubstream->oss.file = pcm_oss_file; 1791 err = snd_pcm_hw_constraints_init(csubstream); 1792 if (err < 0) { 1793 snd_printd("snd_pcm_hw_constraint_init failed\n"); 1794 snd_pcm_oss_release_file(pcm_oss_file); 1795 return err; 1796 } 1797 if ((err = csubstream->ops->open(csubstream)) < 0) { 1798 snd_pcm_oss_release_file(pcm_oss_file); 1799 return err; 1800 } 1801 csubstream->ffile = file; 1802 err = snd_pcm_hw_constraints_complete(csubstream); 1803 if (err < 0) { 1804 snd_printd("snd_pcm_hw_constraint_complete failed\n"); 1805 snd_pcm_oss_release_file(pcm_oss_file); 1806 return err; 1807 } 1808 snd_pcm_oss_init_substream(csubstream, csetup, minor); 1809 } 1810 1811 file->private_data = pcm_oss_file; 1812 *rpcm_oss_file = pcm_oss_file; 1813 return 0; 1814 } 1815 1816 1817 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 1818 { 1819 int minor = iminor(inode); 1820 int cardnum = SNDRV_MINOR_OSS_CARD(minor); 1821 int device; 1822 int err; 1823 char task_name[32]; 1824 snd_pcm_t *pcm; 1825 snd_pcm_oss_file_t *pcm_oss_file; 1826 snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL; 1827 int nonblock; 1828 wait_queue_t wait; 1829 1830 snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO); 1831 device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ? 1832 adsp_map[cardnum] : dsp_map[cardnum]; 1833 1834 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device]; 1835 if (pcm == NULL) { 1836 err = -ENODEV; 1837 goto __error1; 1838 } 1839 err = snd_card_file_add(pcm->card, file); 1840 if (err < 0) 1841 goto __error1; 1842 if (!try_module_get(pcm->card->module)) { 1843 err = -EFAULT; 1844 goto __error2; 1845 } 1846 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 1847 err = -EFAULT; 1848 goto __error; 1849 } 1850 if (file->f_mode & FMODE_WRITE) 1851 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name); 1852 if (file->f_mode & FMODE_READ) 1853 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name); 1854 1855 nonblock = !!(file->f_flags & O_NONBLOCK); 1856 if (psetup && !psetup->disable) { 1857 if (psetup->nonblock) 1858 nonblock = 1; 1859 else if (psetup->block) 1860 nonblock = 0; 1861 } else if (csetup && !csetup->disable) { 1862 if (csetup->nonblock) 1863 nonblock = 1; 1864 else if (csetup->block) 1865 nonblock = 0; 1866 } 1867 if (!nonblock) 1868 nonblock = nonblock_open; 1869 1870 init_waitqueue_entry(&wait, current); 1871 add_wait_queue(&pcm->open_wait, &wait); 1872 down(&pcm->open_mutex); 1873 while (1) { 1874 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 1875 minor, psetup, csetup); 1876 if (err >= 0) 1877 break; 1878 if (err == -EAGAIN) { 1879 if (nonblock) { 1880 err = -EBUSY; 1881 break; 1882 } 1883 } else 1884 break; 1885 set_current_state(TASK_INTERRUPTIBLE); 1886 up(&pcm->open_mutex); 1887 schedule(); 1888 down(&pcm->open_mutex); 1889 if (signal_pending(current)) { 1890 err = -ERESTARTSYS; 1891 break; 1892 } 1893 } 1894 remove_wait_queue(&pcm->open_wait, &wait); 1895 up(&pcm->open_mutex); 1896 if (err < 0) 1897 goto __error; 1898 return err; 1899 1900 __error: 1901 module_put(pcm->card->module); 1902 __error2: 1903 snd_card_file_remove(pcm->card, file); 1904 __error1: 1905 return err; 1906 } 1907 1908 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 1909 { 1910 snd_pcm_t *pcm; 1911 snd_pcm_substream_t *substream; 1912 snd_pcm_oss_file_t *pcm_oss_file; 1913 1914 pcm_oss_file = file->private_data; 1915 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1916 if (substream == NULL) 1917 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1918 snd_assert(substream != NULL, return -ENXIO); 1919 pcm = substream->pcm; 1920 snd_pcm_oss_sync(pcm_oss_file); 1921 down(&pcm->open_mutex); 1922 snd_pcm_oss_release_file(pcm_oss_file); 1923 up(&pcm->open_mutex); 1924 wake_up(&pcm->open_wait); 1925 module_put(pcm->card->module); 1926 snd_card_file_remove(pcm->card, file); 1927 return 0; 1928 } 1929 1930 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1931 { 1932 snd_pcm_oss_file_t *pcm_oss_file; 1933 int __user *p = (int __user *)arg; 1934 int res; 1935 1936 pcm_oss_file = file->private_data; 1937 if (cmd == OSS_GETVERSION) 1938 return put_user(SNDRV_OSS_VERSION, p); 1939 if (cmd == OSS_ALSAEMULVER) 1940 return put_user(1, p); 1941 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 1942 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 1943 snd_pcm_substream_t *substream; 1944 int idx; 1945 for (idx = 0; idx < 2; ++idx) { 1946 substream = pcm_oss_file->streams[idx]; 1947 if (substream != NULL) 1948 break; 1949 } 1950 snd_assert(substream != NULL, return -ENXIO); 1951 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 1952 } 1953 #endif 1954 if (((cmd >> 8) & 0xff) != 'P') 1955 return -EINVAL; 1956 #ifdef OSS_DEBUG 1957 printk("pcm_oss: ioctl = 0x%x\n", cmd); 1958 #endif 1959 switch (cmd) { 1960 case SNDCTL_DSP_RESET: 1961 return snd_pcm_oss_reset(pcm_oss_file); 1962 case SNDCTL_DSP_SYNC: 1963 return snd_pcm_oss_sync(pcm_oss_file); 1964 case SNDCTL_DSP_SPEED: 1965 if (get_user(res, p)) 1966 return -EFAULT; 1967 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 1968 return res; 1969 return put_user(res, p); 1970 case SOUND_PCM_READ_RATE: 1971 res = snd_pcm_oss_get_rate(pcm_oss_file); 1972 if (res < 0) 1973 return res; 1974 return put_user(res, p); 1975 case SNDCTL_DSP_STEREO: 1976 if (get_user(res, p)) 1977 return -EFAULT; 1978 res = res > 0 ? 2 : 1; 1979 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 1980 return res; 1981 return put_user(--res, p); 1982 case SNDCTL_DSP_GETBLKSIZE: 1983 res = snd_pcm_oss_get_block_size(pcm_oss_file); 1984 if (res < 0) 1985 return res; 1986 return put_user(res, p); 1987 case SNDCTL_DSP_SETFMT: 1988 if (get_user(res, p)) 1989 return -EFAULT; 1990 res = snd_pcm_oss_set_format(pcm_oss_file, res); 1991 if (res < 0) 1992 return res; 1993 return put_user(res, p); 1994 case SOUND_PCM_READ_BITS: 1995 res = snd_pcm_oss_get_format(pcm_oss_file); 1996 if (res < 0) 1997 return res; 1998 return put_user(res, p); 1999 case SNDCTL_DSP_CHANNELS: 2000 if (get_user(res, p)) 2001 return -EFAULT; 2002 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2003 if (res < 0) 2004 return res; 2005 return put_user(res, p); 2006 case SOUND_PCM_READ_CHANNELS: 2007 res = snd_pcm_oss_get_channels(pcm_oss_file); 2008 if (res < 0) 2009 return res; 2010 return put_user(res, p); 2011 case SOUND_PCM_WRITE_FILTER: 2012 case SOUND_PCM_READ_FILTER: 2013 return -EIO; 2014 case SNDCTL_DSP_POST: 2015 return snd_pcm_oss_post(pcm_oss_file); 2016 case SNDCTL_DSP_SUBDIVIDE: 2017 if (get_user(res, p)) 2018 return -EFAULT; 2019 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2020 if (res < 0) 2021 return res; 2022 return put_user(res, p); 2023 case SNDCTL_DSP_SETFRAGMENT: 2024 if (get_user(res, p)) 2025 return -EFAULT; 2026 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2027 case SNDCTL_DSP_GETFMTS: 2028 res = snd_pcm_oss_get_formats(pcm_oss_file); 2029 if (res < 0) 2030 return res; 2031 return put_user(res, p); 2032 case SNDCTL_DSP_GETOSPACE: 2033 case SNDCTL_DSP_GETISPACE: 2034 return snd_pcm_oss_get_space(pcm_oss_file, 2035 cmd == SNDCTL_DSP_GETISPACE ? 2036 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2037 (struct audio_buf_info __user *) arg); 2038 case SNDCTL_DSP_NONBLOCK: 2039 return snd_pcm_oss_nonblock(file); 2040 case SNDCTL_DSP_GETCAPS: 2041 res = snd_pcm_oss_get_caps(pcm_oss_file); 2042 if (res < 0) 2043 return res; 2044 return put_user(res, p); 2045 case SNDCTL_DSP_GETTRIGGER: 2046 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2047 if (res < 0) 2048 return res; 2049 return put_user(res, p); 2050 case SNDCTL_DSP_SETTRIGGER: 2051 if (get_user(res, p)) 2052 return -EFAULT; 2053 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2054 case SNDCTL_DSP_GETIPTR: 2055 case SNDCTL_DSP_GETOPTR: 2056 return snd_pcm_oss_get_ptr(pcm_oss_file, 2057 cmd == SNDCTL_DSP_GETIPTR ? 2058 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2059 (struct count_info __user *) arg); 2060 case SNDCTL_DSP_MAPINBUF: 2061 case SNDCTL_DSP_MAPOUTBUF: 2062 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2063 cmd == SNDCTL_DSP_MAPINBUF ? 2064 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2065 (struct buffmem_desc __user *) arg); 2066 case SNDCTL_DSP_SETSYNCRO: 2067 /* stop DMA now.. */ 2068 return 0; 2069 case SNDCTL_DSP_SETDUPLEX: 2070 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2071 return 0; 2072 return -EIO; 2073 case SNDCTL_DSP_GETODELAY: 2074 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2075 if (res < 0) { 2076 /* it's for sure, some broken apps don't check for error codes */ 2077 put_user(0, p); 2078 return res; 2079 } 2080 return put_user(res, p); 2081 case SNDCTL_DSP_PROFILE: 2082 return 0; /* silently ignore */ 2083 default: 2084 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2085 } 2086 return -EINVAL; 2087 } 2088 2089 #ifdef CONFIG_COMPAT 2090 /* all compatible */ 2091 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2092 #else 2093 #define snd_pcm_oss_ioctl_compat NULL 2094 #endif 2095 2096 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2097 { 2098 snd_pcm_oss_file_t *pcm_oss_file; 2099 snd_pcm_substream_t *substream; 2100 2101 pcm_oss_file = file->private_data; 2102 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2103 if (substream == NULL) 2104 return -ENXIO; 2105 #ifndef OSS_DEBUG 2106 return snd_pcm_oss_read1(substream, buf, count); 2107 #else 2108 { 2109 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2110 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); 2111 return res; 2112 } 2113 #endif 2114 } 2115 2116 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2117 { 2118 snd_pcm_oss_file_t *pcm_oss_file; 2119 snd_pcm_substream_t *substream; 2120 long result; 2121 2122 pcm_oss_file = file->private_data; 2123 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2124 if (substream == NULL) 2125 return -ENXIO; 2126 up(&file->f_dentry->d_inode->i_sem); 2127 result = snd_pcm_oss_write1(substream, buf, count); 2128 down(&file->f_dentry->d_inode->i_sem); 2129 #ifdef OSS_DEBUG 2130 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); 2131 #endif 2132 return result; 2133 } 2134 2135 static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream) 2136 { 2137 snd_pcm_runtime_t *runtime = substream->runtime; 2138 if (atomic_read(&runtime->mmap_count)) 2139 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2140 else 2141 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; 2142 } 2143 2144 static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream) 2145 { 2146 snd_pcm_runtime_t *runtime = substream->runtime; 2147 if (atomic_read(&runtime->mmap_count)) 2148 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2149 else 2150 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; 2151 } 2152 2153 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2154 { 2155 snd_pcm_oss_file_t *pcm_oss_file; 2156 unsigned int mask; 2157 snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; 2158 2159 pcm_oss_file = file->private_data; 2160 2161 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2162 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2163 2164 mask = 0; 2165 if (psubstream != NULL) { 2166 snd_pcm_runtime_t *runtime = psubstream->runtime; 2167 poll_wait(file, &runtime->sleep, wait); 2168 snd_pcm_stream_lock_irq(psubstream); 2169 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2170 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2171 snd_pcm_oss_playback_ready(psubstream))) 2172 mask |= POLLOUT | POLLWRNORM; 2173 snd_pcm_stream_unlock_irq(psubstream); 2174 } 2175 if (csubstream != NULL) { 2176 snd_pcm_runtime_t *runtime = csubstream->runtime; 2177 enum sndrv_pcm_state ostate; 2178 poll_wait(file, &runtime->sleep, wait); 2179 snd_pcm_stream_lock_irq(csubstream); 2180 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2181 snd_pcm_oss_capture_ready(csubstream)) 2182 mask |= POLLIN | POLLRDNORM; 2183 snd_pcm_stream_unlock_irq(csubstream); 2184 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2185 snd_pcm_oss_file_t ofile; 2186 memset(&ofile, 0, sizeof(ofile)); 2187 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2188 runtime->oss.trigger = 0; 2189 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2190 } 2191 } 2192 2193 return mask; 2194 } 2195 2196 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2197 { 2198 snd_pcm_oss_file_t *pcm_oss_file; 2199 snd_pcm_substream_t *substream = NULL; 2200 snd_pcm_runtime_t *runtime; 2201 int err; 2202 2203 #ifdef OSS_DEBUG 2204 printk("pcm_oss: mmap begin\n"); 2205 #endif 2206 pcm_oss_file = file->private_data; 2207 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2208 case VM_READ | VM_WRITE: 2209 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2210 if (substream) 2211 break; 2212 /* Fall through */ 2213 case VM_READ: 2214 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2215 break; 2216 case VM_WRITE: 2217 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2218 break; 2219 default: 2220 return -EINVAL; 2221 } 2222 /* set VM_READ access as well to fix memset() routines that do 2223 reads before writes (to improve performance) */ 2224 area->vm_flags |= VM_READ; 2225 if (substream == NULL) 2226 return -ENXIO; 2227 runtime = substream->runtime; 2228 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2229 return -EIO; 2230 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2231 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2232 else 2233 return -EIO; 2234 2235 if (runtime->oss.params) { 2236 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2237 return err; 2238 } 2239 if (runtime->oss.plugin_first != NULL) 2240 return -EIO; 2241 2242 if (area->vm_pgoff != 0) 2243 return -EINVAL; 2244 2245 err = snd_pcm_mmap_data(substream, file, area); 2246 if (err < 0) 2247 return err; 2248 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2249 runtime->silence_threshold = 0; 2250 runtime->silence_size = 0; 2251 #ifdef OSS_DEBUG 2252 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); 2253 #endif 2254 /* In mmap mode we never stop */ 2255 runtime->stop_threshold = runtime->boundary; 2256 2257 return 0; 2258 } 2259 2260 /* 2261 * /proc interface 2262 */ 2263 2264 static void snd_pcm_oss_proc_read(snd_info_entry_t *entry, 2265 snd_info_buffer_t * buffer) 2266 { 2267 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; 2268 snd_pcm_oss_setup_t *setup = pstr->oss.setup_list; 2269 down(&pstr->oss.setup_mutex); 2270 while (setup) { 2271 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2272 setup->task_name, 2273 setup->periods, 2274 setup->period_size, 2275 setup->disable ? " disable" : "", 2276 setup->direct ? " direct" : "", 2277 setup->block ? " block" : "", 2278 setup->nonblock ? " non-block" : "", 2279 setup->partialfrag ? " partial-frag" : "", 2280 setup->nosilence ? " no-silence" : ""); 2281 setup = setup->next; 2282 } 2283 up(&pstr->oss.setup_mutex); 2284 } 2285 2286 static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr) 2287 { 2288 unsigned int idx; 2289 snd_pcm_substream_t *substream; 2290 snd_pcm_oss_setup_t *setup, *setupn; 2291 2292 for (idx = 0, substream = pstr->substream; 2293 idx < pstr->substream_count; idx++, substream = substream->next) 2294 substream->oss.setup = NULL; 2295 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2296 setup; setup = setupn) { 2297 setupn = setup->next; 2298 kfree(setup->task_name); 2299 kfree(setup); 2300 } 2301 pstr->oss.setup_list = NULL; 2302 } 2303 2304 static void snd_pcm_oss_proc_write(snd_info_entry_t *entry, 2305 snd_info_buffer_t * buffer) 2306 { 2307 snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; 2308 char line[128], str[32], task_name[32], *ptr; 2309 int idx1; 2310 snd_pcm_oss_setup_t *setup, *setup1, template; 2311 2312 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2313 down(&pstr->oss.setup_mutex); 2314 memset(&template, 0, sizeof(template)); 2315 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2316 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2317 snd_pcm_oss_proc_free_setup_list(pstr); 2318 up(&pstr->oss.setup_mutex); 2319 continue; 2320 } 2321 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2322 if (!strcmp(setup->task_name, task_name)) { 2323 template = *setup; 2324 break; 2325 } 2326 } 2327 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2328 template.periods = simple_strtoul(str, NULL, 10); 2329 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2330 template.period_size = simple_strtoul(str, NULL, 10); 2331 for (idx1 = 31; idx1 >= 0; idx1--) 2332 if (template.period_size & (1 << idx1)) 2333 break; 2334 for (idx1--; idx1 >= 0; idx1--) 2335 template.period_size &= ~(1 << idx1); 2336 do { 2337 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2338 if (!strcmp(str, "disable")) { 2339 template.disable = 1; 2340 } else if (!strcmp(str, "direct")) { 2341 template.direct = 1; 2342 } else if (!strcmp(str, "block")) { 2343 template.block = 1; 2344 } else if (!strcmp(str, "non-block")) { 2345 template.nonblock = 1; 2346 } else if (!strcmp(str, "partial-frag")) { 2347 template.partialfrag = 1; 2348 } else if (!strcmp(str, "no-silence")) { 2349 template.nosilence = 1; 2350 } 2351 } while (*str); 2352 if (setup == NULL) { 2353 setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL); 2354 if (setup) { 2355 if (pstr->oss.setup_list == NULL) { 2356 pstr->oss.setup_list = setup; 2357 } else { 2358 for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next); 2359 setup1->next = setup; 2360 } 2361 template.task_name = kstrdup(task_name, GFP_KERNEL); 2362 } else { 2363 buffer->error = -ENOMEM; 2364 } 2365 } 2366 if (setup) 2367 *setup = template; 2368 up(&pstr->oss.setup_mutex); 2369 } 2370 } 2371 2372 static void snd_pcm_oss_proc_init(snd_pcm_t *pcm) 2373 { 2374 int stream; 2375 for (stream = 0; stream < 2; ++stream) { 2376 snd_info_entry_t *entry; 2377 snd_pcm_str_t *pstr = &pcm->streams[stream]; 2378 if (pstr->substream_count == 0) 2379 continue; 2380 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2381 entry->content = SNDRV_INFO_CONTENT_TEXT; 2382 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2383 entry->c.text.read_size = 8192; 2384 entry->c.text.read = snd_pcm_oss_proc_read; 2385 entry->c.text.write_size = 8192; 2386 entry->c.text.write = snd_pcm_oss_proc_write; 2387 entry->private_data = pstr; 2388 if (snd_info_register(entry) < 0) { 2389 snd_info_free_entry(entry); 2390 entry = NULL; 2391 } 2392 } 2393 pstr->oss.proc_entry = entry; 2394 } 2395 } 2396 2397 static void snd_pcm_oss_proc_done(snd_pcm_t *pcm) 2398 { 2399 int stream; 2400 for (stream = 0; stream < 2; ++stream) { 2401 snd_pcm_str_t *pstr = &pcm->streams[stream]; 2402 if (pstr->oss.proc_entry) { 2403 snd_info_unregister(pstr->oss.proc_entry); 2404 pstr->oss.proc_entry = NULL; 2405 snd_pcm_oss_proc_free_setup_list(pstr); 2406 } 2407 } 2408 } 2409 2410 /* 2411 * ENTRY functions 2412 */ 2413 2414 static struct file_operations snd_pcm_oss_f_reg = 2415 { 2416 .owner = THIS_MODULE, 2417 .read = snd_pcm_oss_read, 2418 .write = snd_pcm_oss_write, 2419 .open = snd_pcm_oss_open, 2420 .release = snd_pcm_oss_release, 2421 .poll = snd_pcm_oss_poll, 2422 .unlocked_ioctl = snd_pcm_oss_ioctl, 2423 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2424 .mmap = snd_pcm_oss_mmap, 2425 }; 2426 2427 static snd_minor_t snd_pcm_oss_reg = 2428 { 2429 .comment = "digital audio", 2430 .f_ops = &snd_pcm_oss_f_reg, 2431 }; 2432 2433 static void register_oss_dsp(snd_pcm_t *pcm, int index) 2434 { 2435 char name[128]; 2436 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2437 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2438 pcm->card, index, &snd_pcm_oss_reg, 2439 name) < 0) { 2440 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device); 2441 } 2442 } 2443 2444 static int snd_pcm_oss_register_minor(snd_pcm_t * pcm) 2445 { 2446 pcm->oss.reg = 0; 2447 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2448 char name[128]; 2449 int duplex; 2450 register_oss_dsp(pcm, 0); 2451 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2452 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2453 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2454 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2455 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2456 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2457 pcm->card->number, 2458 name); 2459 #endif 2460 pcm->oss.reg++; 2461 pcm->oss.reg_mask |= 1; 2462 } 2463 if (adsp_map[pcm->card->number] == (int)pcm->device) { 2464 register_oss_dsp(pcm, 1); 2465 pcm->oss.reg++; 2466 pcm->oss.reg_mask |= 2; 2467 } 2468 2469 if (pcm->oss.reg) 2470 snd_pcm_oss_proc_init(pcm); 2471 2472 return 0; 2473 } 2474 2475 static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm) 2476 { 2477 if (pcm->oss.reg) { 2478 if (pcm->oss.reg_mask & 1) { 2479 pcm->oss.reg_mask &= ~1; 2480 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2481 pcm->card, 0); 2482 } 2483 if (pcm->oss.reg_mask & 2) { 2484 pcm->oss.reg_mask &= ~2; 2485 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2486 pcm->card, 1); 2487 } 2488 } 2489 return 0; 2490 } 2491 2492 static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm) 2493 { 2494 snd_pcm_oss_disconnect_minor(pcm); 2495 if (pcm->oss.reg) { 2496 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2497 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2498 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 2499 #endif 2500 } 2501 pcm->oss.reg = 0; 2502 snd_pcm_oss_proc_done(pcm); 2503 } 2504 return 0; 2505 } 2506 2507 static snd_pcm_notify_t snd_pcm_oss_notify = 2508 { 2509 .n_register = snd_pcm_oss_register_minor, 2510 .n_disconnect = snd_pcm_oss_disconnect_minor, 2511 .n_unregister = snd_pcm_oss_unregister_minor, 2512 }; 2513 2514 static int __init alsa_pcm_oss_init(void) 2515 { 2516 int i; 2517 int err; 2518 2519 /* check device map table */ 2520 for (i = 0; i < SNDRV_CARDS; i++) { 2521 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 2522 snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]); 2523 dsp_map[i] = 0; 2524 } 2525 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 2526 snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]); 2527 adsp_map[i] = 1; 2528 } 2529 } 2530 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 2531 return err; 2532 return 0; 2533 } 2534 2535 static void __exit alsa_pcm_oss_exit(void) 2536 { 2537 snd_pcm_notify(&snd_pcm_oss_notify, 1); 2538 } 2539 2540 module_init(alsa_pcm_oss_init) 2541 module_exit(alsa_pcm_oss_exit) 2542