1 /* 2 * Dummy soundcard 3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 * 19 */ 20 21 #include <sound/driver.h> 22 #include <linux/init.h> 23 #include <linux/jiffies.h> 24 #include <linux/slab.h> 25 #include <linux/time.h> 26 #include <linux/wait.h> 27 #include <linux/moduleparam.h> 28 #include <sound/core.h> 29 #include <sound/control.h> 30 #include <sound/pcm.h> 31 #include <sound/rawmidi.h> 32 #include <sound/initval.h> 33 34 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); 35 MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); 36 MODULE_LICENSE("GPL"); 37 MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); 38 39 #define MAX_PCM_DEVICES 4 40 #define MAX_PCM_SUBSTREAMS 16 41 #define MAX_MIDI_DEVICES 2 42 43 #if 0 /* emu10k1 emulation */ 44 #define MAX_BUFFER_SIZE (128 * 1024) 45 static int emu10k1_playback_constraints(snd_pcm_runtime_t *runtime) 46 { 47 int err; 48 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 49 return err; 50 if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) 51 return err; 52 return 0; 53 } 54 #define add_playback_constraints emu10k1_playback_constraints 55 #endif 56 57 #if 0 /* RME9652 emulation */ 58 #define MAX_BUFFER_SIZE (26 * 64 * 1024) 59 #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE 60 #define USE_CHANNELS_MIN 26 61 #define USE_CHANNELS_MAX 26 62 #define USE_PERIODS_MIN 2 63 #define USE_PERIODS_MAX 2 64 #endif 65 66 #if 0 /* ICE1712 emulation */ 67 #define MAX_BUFFER_SIZE (256 * 1024) 68 #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE 69 #define USE_CHANNELS_MIN 10 70 #define USE_CHANNELS_MAX 10 71 #define USE_PERIODS_MIN 1 72 #define USE_PERIODS_MAX 1024 73 #endif 74 75 #if 0 /* UDA1341 emulation */ 76 #define MAX_BUFFER_SIZE (16380) 77 #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE 78 #define USE_CHANNELS_MIN 2 79 #define USE_CHANNELS_MAX 2 80 #define USE_PERIODS_MIN 2 81 #define USE_PERIODS_MAX 255 82 #endif 83 84 #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */ 85 #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE 86 #define USE_CHANNELS_MIN 2 87 #define USE_CHANNELS_MAX 2 88 #define USE_RATE SNDRV_PCM_RATE_48000 89 #define USE_RATE_MIN 48000 90 #define USE_RATE_MAX 48000 91 #endif 92 93 94 /* defaults */ 95 #ifndef MAX_BUFFER_SIZE 96 #define MAX_BUFFER_SIZE (64*1024) 97 #endif 98 #ifndef USE_FORMATS 99 #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) 100 #endif 101 #ifndef USE_RATE 102 #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 103 #define USE_RATE_MIN 5500 104 #define USE_RATE_MAX 48000 105 #endif 106 #ifndef USE_CHANNELS_MIN 107 #define USE_CHANNELS_MIN 1 108 #endif 109 #ifndef USE_CHANNELS_MAX 110 #define USE_CHANNELS_MAX 2 111 #endif 112 #ifndef USE_PERIODS_MIN 113 #define USE_PERIODS_MIN 1 114 #endif 115 #ifndef USE_PERIODS_MAX 116 #define USE_PERIODS_MAX 1024 117 #endif 118 #ifndef add_playback_constraints 119 #define add_playback_constraints(x) 0 120 #endif 121 #ifndef add_capture_constraints 122 #define add_capture_constraints(x) 0 123 #endif 124 125 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 126 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 127 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; 128 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; 129 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; 130 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; 131 132 module_param_array(index, int, NULL, 0444); 133 MODULE_PARM_DESC(index, "Index value for dummy soundcard."); 134 module_param_array(id, charp, NULL, 0444); 135 MODULE_PARM_DESC(id, "ID string for dummy soundcard."); 136 module_param_array(enable, bool, NULL, 0444); 137 MODULE_PARM_DESC(enable, "Enable this dummy soundcard."); 138 module_param_array(pcm_devs, int, NULL, 0444); 139 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver."); 140 module_param_array(pcm_substreams, int, NULL, 0444); 141 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver."); 142 //module_param_array(midi_devs, int, NULL, 0444); 143 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); 144 145 #define MIXER_ADDR_MASTER 0 146 #define MIXER_ADDR_LINE 1 147 #define MIXER_ADDR_MIC 2 148 #define MIXER_ADDR_SYNTH 3 149 #define MIXER_ADDR_CD 4 150 #define MIXER_ADDR_LAST 4 151 152 typedef struct snd_card_dummy { 153 snd_card_t *card; 154 spinlock_t mixer_lock; 155 int mixer_volume[MIXER_ADDR_LAST+1][2]; 156 int capture_source[MIXER_ADDR_LAST+1][2]; 157 } snd_card_dummy_t; 158 159 typedef struct snd_card_dummy_pcm { 160 snd_card_dummy_t *dummy; 161 spinlock_t lock; 162 struct timer_list timer; 163 unsigned int pcm_size; 164 unsigned int pcm_count; 165 unsigned int pcm_bps; /* bytes per second */ 166 unsigned int pcm_jiffie; /* bytes per one jiffie */ 167 unsigned int pcm_irq_pos; /* IRQ position */ 168 unsigned int pcm_buf_pos; /* position in buffer */ 169 snd_pcm_substream_t *substream; 170 } snd_card_dummy_pcm_t; 171 172 static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; 173 174 175 static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream) 176 { 177 snd_pcm_runtime_t *runtime = substream->runtime; 178 snd_card_dummy_pcm_t *dpcm = runtime->private_data; 179 180 dpcm->timer.expires = 1 + jiffies; 181 add_timer(&dpcm->timer); 182 } 183 184 static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream) 185 { 186 snd_pcm_runtime_t *runtime = substream->runtime; 187 snd_card_dummy_pcm_t *dpcm = runtime->private_data; 188 189 del_timer(&dpcm->timer); 190 } 191 192 static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream, 193 int cmd) 194 { 195 if (cmd == SNDRV_PCM_TRIGGER_START) { 196 snd_card_dummy_pcm_timer_start(substream); 197 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { 198 snd_card_dummy_pcm_timer_stop(substream); 199 } else { 200 return -EINVAL; 201 } 202 return 0; 203 } 204 205 static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream, 206 int cmd) 207 { 208 if (cmd == SNDRV_PCM_TRIGGER_START) { 209 snd_card_dummy_pcm_timer_start(substream); 210 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { 211 snd_card_dummy_pcm_timer_stop(substream); 212 } else { 213 return -EINVAL; 214 } 215 return 0; 216 } 217 218 static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream) 219 { 220 snd_pcm_runtime_t *runtime = substream->runtime; 221 snd_card_dummy_pcm_t *dpcm = runtime->private_data; 222 unsigned int bps; 223 224 bps = runtime->rate * runtime->channels; 225 bps *= snd_pcm_format_width(runtime->format); 226 bps /= 8; 227 if (bps <= 0) 228 return -EINVAL; 229 dpcm->pcm_bps = bps; 230 dpcm->pcm_jiffie = bps / HZ; 231 dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream); 232 dpcm->pcm_count = snd_pcm_lib_period_bytes(substream); 233 dpcm->pcm_irq_pos = 0; 234 dpcm->pcm_buf_pos = 0; 235 return 0; 236 } 237 238 static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream) 239 { 240 return snd_card_dummy_pcm_prepare(substream); 241 } 242 243 static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream) 244 { 245 return snd_card_dummy_pcm_prepare(substream); 246 } 247 248 static void snd_card_dummy_pcm_timer_function(unsigned long data) 249 { 250 snd_card_dummy_pcm_t *dpcm = (snd_card_dummy_pcm_t *)data; 251 252 dpcm->timer.expires = 1 + jiffies; 253 add_timer(&dpcm->timer); 254 spin_lock_irq(&dpcm->lock); 255 dpcm->pcm_irq_pos += dpcm->pcm_jiffie; 256 dpcm->pcm_buf_pos += dpcm->pcm_jiffie; 257 dpcm->pcm_buf_pos %= dpcm->pcm_size; 258 if (dpcm->pcm_irq_pos >= dpcm->pcm_count) { 259 dpcm->pcm_irq_pos %= dpcm->pcm_count; 260 snd_pcm_period_elapsed(dpcm->substream); 261 } 262 spin_unlock_irq(&dpcm->lock); 263 } 264 265 static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream) 266 { 267 snd_pcm_runtime_t *runtime = substream->runtime; 268 snd_card_dummy_pcm_t *dpcm = runtime->private_data; 269 270 return bytes_to_frames(runtime, dpcm->pcm_buf_pos); 271 } 272 273 static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream) 274 { 275 snd_pcm_runtime_t *runtime = substream->runtime; 276 snd_card_dummy_pcm_t *dpcm = runtime->private_data; 277 278 return bytes_to_frames(runtime, dpcm->pcm_buf_pos); 279 } 280 281 static snd_pcm_hardware_t snd_card_dummy_playback = 282 { 283 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 284 SNDRV_PCM_INFO_MMAP_VALID), 285 .formats = USE_FORMATS, 286 .rates = USE_RATE, 287 .rate_min = USE_RATE_MIN, 288 .rate_max = USE_RATE_MAX, 289 .channels_min = USE_CHANNELS_MIN, 290 .channels_max = USE_CHANNELS_MAX, 291 .buffer_bytes_max = MAX_BUFFER_SIZE, 292 .period_bytes_min = 64, 293 .period_bytes_max = MAX_BUFFER_SIZE, 294 .periods_min = USE_PERIODS_MIN, 295 .periods_max = USE_PERIODS_MAX, 296 .fifo_size = 0, 297 }; 298 299 static snd_pcm_hardware_t snd_card_dummy_capture = 300 { 301 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 302 SNDRV_PCM_INFO_MMAP_VALID), 303 .formats = USE_FORMATS, 304 .rates = USE_RATE, 305 .rate_min = USE_RATE_MIN, 306 .rate_max = USE_RATE_MAX, 307 .channels_min = USE_CHANNELS_MIN, 308 .channels_max = USE_CHANNELS_MAX, 309 .buffer_bytes_max = MAX_BUFFER_SIZE, 310 .period_bytes_min = 64, 311 .period_bytes_max = MAX_BUFFER_SIZE, 312 .periods_min = USE_PERIODS_MIN, 313 .periods_max = USE_PERIODS_MAX, 314 .fifo_size = 0, 315 }; 316 317 static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime) 318 { 319 snd_card_dummy_pcm_t *dpcm = runtime->private_data; 320 kfree(dpcm); 321 } 322 323 static int snd_card_dummy_hw_params(snd_pcm_substream_t * substream, 324 snd_pcm_hw_params_t * hw_params) 325 { 326 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); 327 } 328 329 static int snd_card_dummy_hw_free(snd_pcm_substream_t * substream) 330 { 331 return snd_pcm_lib_free_pages(substream); 332 } 333 334 static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream) 335 { 336 snd_pcm_runtime_t *runtime = substream->runtime; 337 snd_card_dummy_pcm_t *dpcm; 338 int err; 339 340 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); 341 if (dpcm == NULL) 342 return -ENOMEM; 343 init_timer(&dpcm->timer); 344 dpcm->timer.data = (unsigned long) dpcm; 345 dpcm->timer.function = snd_card_dummy_pcm_timer_function; 346 spin_lock_init(&dpcm->lock); 347 dpcm->substream = substream; 348 runtime->private_data = dpcm; 349 runtime->private_free = snd_card_dummy_runtime_free; 350 runtime->hw = snd_card_dummy_playback; 351 if (substream->pcm->device & 1) { 352 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; 353 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; 354 } 355 if (substream->pcm->device & 2) 356 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); 357 if ((err = add_playback_constraints(runtime)) < 0) { 358 kfree(dpcm); 359 return err; 360 } 361 362 return 0; 363 } 364 365 static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream) 366 { 367 snd_pcm_runtime_t *runtime = substream->runtime; 368 snd_card_dummy_pcm_t *dpcm; 369 int err; 370 371 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); 372 if (dpcm == NULL) 373 return -ENOMEM; 374 init_timer(&dpcm->timer); 375 dpcm->timer.data = (unsigned long) dpcm; 376 dpcm->timer.function = snd_card_dummy_pcm_timer_function; 377 spin_lock_init(&dpcm->lock); 378 dpcm->substream = substream; 379 runtime->private_data = dpcm; 380 runtime->private_free = snd_card_dummy_runtime_free; 381 runtime->hw = snd_card_dummy_capture; 382 if (substream->pcm->device == 1) { 383 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; 384 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; 385 } 386 if (substream->pcm->device & 2) 387 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); 388 if ((err = add_capture_constraints(runtime)) < 0) { 389 kfree(dpcm); 390 return err; 391 } 392 393 return 0; 394 } 395 396 static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream) 397 { 398 return 0; 399 } 400 401 static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream) 402 { 403 return 0; 404 } 405 406 static snd_pcm_ops_t snd_card_dummy_playback_ops = { 407 .open = snd_card_dummy_playback_open, 408 .close = snd_card_dummy_playback_close, 409 .ioctl = snd_pcm_lib_ioctl, 410 .hw_params = snd_card_dummy_hw_params, 411 .hw_free = snd_card_dummy_hw_free, 412 .prepare = snd_card_dummy_playback_prepare, 413 .trigger = snd_card_dummy_playback_trigger, 414 .pointer = snd_card_dummy_playback_pointer, 415 }; 416 417 static snd_pcm_ops_t snd_card_dummy_capture_ops = { 418 .open = snd_card_dummy_capture_open, 419 .close = snd_card_dummy_capture_close, 420 .ioctl = snd_pcm_lib_ioctl, 421 .hw_params = snd_card_dummy_hw_params, 422 .hw_free = snd_card_dummy_hw_free, 423 .prepare = snd_card_dummy_capture_prepare, 424 .trigger = snd_card_dummy_capture_trigger, 425 .pointer = snd_card_dummy_capture_pointer, 426 }; 427 428 static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams) 429 { 430 snd_pcm_t *pcm; 431 int err; 432 433 if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm)) < 0) 434 return err; 435 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops); 436 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops); 437 pcm->private_data = dummy; 438 pcm->info_flags = 0; 439 strcpy(pcm->name, "Dummy PCM"); 440 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, 441 snd_dma_continuous_data(GFP_KERNEL), 442 0, 64*1024); 443 return 0; 444 } 445 446 #define DUMMY_VOLUME(xname, xindex, addr) \ 447 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 448 .info = snd_dummy_volume_info, \ 449 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ 450 .private_value = addr } 451 452 static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) 453 { 454 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 455 uinfo->count = 2; 456 uinfo->value.integer.min = -50; 457 uinfo->value.integer.max = 100; 458 return 0; 459 } 460 461 static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) 462 { 463 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); 464 unsigned long flags; 465 int addr = kcontrol->private_value; 466 467 spin_lock_irqsave(&dummy->mixer_lock, flags); 468 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; 469 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; 470 spin_unlock_irqrestore(&dummy->mixer_lock, flags); 471 return 0; 472 } 473 474 static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) 475 { 476 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); 477 unsigned long flags; 478 int change, addr = kcontrol->private_value; 479 int left, right; 480 481 left = ucontrol->value.integer.value[0]; 482 if (left < -50) 483 left = -50; 484 if (left > 100) 485 left = 100; 486 right = ucontrol->value.integer.value[1]; 487 if (right < -50) 488 right = -50; 489 if (right > 100) 490 right = 100; 491 spin_lock_irqsave(&dummy->mixer_lock, flags); 492 change = dummy->mixer_volume[addr][0] != left || 493 dummy->mixer_volume[addr][1] != right; 494 dummy->mixer_volume[addr][0] = left; 495 dummy->mixer_volume[addr][1] = right; 496 spin_unlock_irqrestore(&dummy->mixer_lock, flags); 497 return change; 498 } 499 500 #define DUMMY_CAPSRC(xname, xindex, addr) \ 501 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 502 .info = snd_dummy_capsrc_info, \ 503 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ 504 .private_value = addr } 505 506 static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) 507 { 508 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 509 uinfo->count = 2; 510 uinfo->value.integer.min = 0; 511 uinfo->value.integer.max = 1; 512 return 0; 513 } 514 515 static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) 516 { 517 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); 518 unsigned long flags; 519 int addr = kcontrol->private_value; 520 521 spin_lock_irqsave(&dummy->mixer_lock, flags); 522 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; 523 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; 524 spin_unlock_irqrestore(&dummy->mixer_lock, flags); 525 return 0; 526 } 527 528 static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) 529 { 530 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); 531 unsigned long flags; 532 int change, addr = kcontrol->private_value; 533 int left, right; 534 535 left = ucontrol->value.integer.value[0] & 1; 536 right = ucontrol->value.integer.value[1] & 1; 537 spin_lock_irqsave(&dummy->mixer_lock, flags); 538 change = dummy->capture_source[addr][0] != left && 539 dummy->capture_source[addr][1] != right; 540 dummy->capture_source[addr][0] = left; 541 dummy->capture_source[addr][1] = right; 542 spin_unlock_irqrestore(&dummy->mixer_lock, flags); 543 return change; 544 } 545 546 static snd_kcontrol_new_t snd_dummy_controls[] = { 547 DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), 548 DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), 549 DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), 550 DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER), 551 DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), 552 DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER), 553 DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), 554 DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER), 555 DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), 556 DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER) 557 }; 558 559 static int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy) 560 { 561 snd_card_t *card = dummy->card; 562 unsigned int idx; 563 int err; 564 565 snd_assert(dummy != NULL, return -EINVAL); 566 spin_lock_init(&dummy->mixer_lock); 567 strcpy(card->mixername, "Dummy Mixer"); 568 569 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { 570 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0) 571 return err; 572 } 573 return 0; 574 } 575 576 static int __init snd_card_dummy_probe(int dev) 577 { 578 snd_card_t *card; 579 struct snd_card_dummy *dummy; 580 int idx, err; 581 582 if (!enable[dev]) 583 return -ENODEV; 584 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 585 sizeof(struct snd_card_dummy)); 586 if (card == NULL) 587 return -ENOMEM; 588 dummy = (struct snd_card_dummy *)card->private_data; 589 dummy->card = card; 590 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { 591 if (pcm_substreams[dev] < 1) 592 pcm_substreams[dev] = 1; 593 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) 594 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; 595 if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0) 596 goto __nodev; 597 } 598 if ((err = snd_card_dummy_new_mixer(dummy)) < 0) 599 goto __nodev; 600 strcpy(card->driver, "Dummy"); 601 strcpy(card->shortname, "Dummy"); 602 sprintf(card->longname, "Dummy %i", dev + 1); 603 604 if ((err = snd_card_set_generic_dev(card)) < 0) 605 goto __nodev; 606 607 if ((err = snd_card_register(card)) == 0) { 608 snd_dummy_cards[dev] = card; 609 return 0; 610 } 611 __nodev: 612 snd_card_free(card); 613 return err; 614 } 615 616 static int __init alsa_card_dummy_init(void) 617 { 618 int dev, cards; 619 620 for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) { 621 if (snd_card_dummy_probe(dev) < 0) { 622 #ifdef MODULE 623 printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1); 624 #endif 625 break; 626 } 627 cards++; 628 } 629 if (!cards) { 630 #ifdef MODULE 631 printk(KERN_ERR "Dummy soundcard not found or device busy\n"); 632 #endif 633 return -ENODEV; 634 } 635 return 0; 636 } 637 638 static void __exit alsa_card_dummy_exit(void) 639 { 640 int idx; 641 642 for (idx = 0; idx < SNDRV_CARDS; idx++) 643 snd_card_free(snd_dummy_cards[idx]); 644 } 645 646 module_init(alsa_card_dummy_init) 647 module_exit(alsa_card_dummy_exit) 648