1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * OSS emulation layer for the mixer interface 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 5 */ 6 7 #include <linux/init.h> 8 #include <linux/slab.h> 9 #include <linux/time.h> 10 #include <linux/string.h> 11 #include <linux/module.h> 12 #include <linux/compat.h> 13 #include <sound/core.h> 14 #include <sound/minors.h> 15 #include <sound/control.h> 16 #include <sound/info.h> 17 #include <sound/mixer_oss.h> 18 #include <linux/soundcard.h> 19 20 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 21 22 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 23 MODULE_DESCRIPTION("Mixer OSS emulation for ALSA."); 24 MODULE_LICENSE("GPL"); 25 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER); 26 27 static int snd_mixer_oss_open(struct inode *inode, struct file *file) 28 { 29 struct snd_card *card; 30 struct snd_mixer_oss_file *fmixer; 31 int err; 32 33 err = nonseekable_open(inode, file); 34 if (err < 0) 35 return err; 36 37 card = snd_lookup_oss_minor_data(iminor(inode), 38 SNDRV_OSS_DEVICE_TYPE_MIXER); 39 if (card == NULL) 40 return -ENODEV; 41 if (card->mixer_oss == NULL) { 42 snd_card_unref(card); 43 return -ENODEV; 44 } 45 err = snd_card_file_add(card, file); 46 if (err < 0) { 47 snd_card_unref(card); 48 return err; 49 } 50 fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL); 51 if (fmixer == NULL) { 52 snd_card_file_remove(card, file); 53 snd_card_unref(card); 54 return -ENOMEM; 55 } 56 fmixer->card = card; 57 fmixer->mixer = card->mixer_oss; 58 file->private_data = fmixer; 59 if (!try_module_get(card->module)) { 60 kfree(fmixer); 61 snd_card_file_remove(card, file); 62 snd_card_unref(card); 63 return -EFAULT; 64 } 65 snd_card_unref(card); 66 return 0; 67 } 68 69 static int snd_mixer_oss_release(struct inode *inode, struct file *file) 70 { 71 struct snd_mixer_oss_file *fmixer; 72 73 if (file->private_data) { 74 fmixer = file->private_data; 75 module_put(fmixer->card->module); 76 snd_card_file_remove(fmixer->card, file); 77 kfree(fmixer); 78 } 79 return 0; 80 } 81 82 static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer, 83 mixer_info __user *_info) 84 { 85 struct snd_card *card = fmixer->card; 86 struct snd_mixer_oss *mixer = fmixer->mixer; 87 struct mixer_info info; 88 89 memset(&info, 0, sizeof(info)); 90 strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id)); 91 strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name)); 92 info.modify_counter = card->mixer_oss_change_count; 93 if (copy_to_user(_info, &info, sizeof(info))) 94 return -EFAULT; 95 return 0; 96 } 97 98 static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer, 99 _old_mixer_info __user *_info) 100 { 101 struct snd_card *card = fmixer->card; 102 struct snd_mixer_oss *mixer = fmixer->mixer; 103 _old_mixer_info info; 104 105 memset(&info, 0, sizeof(info)); 106 strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id)); 107 strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name)); 108 if (copy_to_user(_info, &info, sizeof(info))) 109 return -EFAULT; 110 return 0; 111 } 112 113 static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer) 114 { 115 struct snd_mixer_oss *mixer = fmixer->mixer; 116 int result = 0; 117 118 if (mixer == NULL) 119 return -EIO; 120 if (mixer->get_recsrc && mixer->put_recsrc) 121 result |= SOUND_CAP_EXCL_INPUT; 122 return result; 123 } 124 125 static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer) 126 { 127 struct snd_mixer_oss *mixer = fmixer->mixer; 128 struct snd_mixer_oss_slot *pslot; 129 int result = 0, chn; 130 131 if (mixer == NULL) 132 return -EIO; 133 guard(mutex)(&mixer->reg_mutex); 134 for (chn = 0; chn < 31; chn++) { 135 pslot = &mixer->slots[chn]; 136 if (pslot->put_volume || pslot->put_recsrc) 137 result |= 1 << chn; 138 } 139 return result; 140 } 141 142 static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer) 143 { 144 struct snd_mixer_oss *mixer = fmixer->mixer; 145 struct snd_mixer_oss_slot *pslot; 146 int result = 0, chn; 147 148 if (mixer == NULL) 149 return -EIO; 150 guard(mutex)(&mixer->reg_mutex); 151 for (chn = 0; chn < 31; chn++) { 152 pslot = &mixer->slots[chn]; 153 if (pslot->put_volume && pslot->stereo) 154 result |= 1 << chn; 155 } 156 return result; 157 } 158 159 static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer) 160 { 161 struct snd_mixer_oss *mixer = fmixer->mixer; 162 int result = 0; 163 164 if (mixer == NULL) 165 return -EIO; 166 guard(mutex)(&mixer->reg_mutex); 167 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */ 168 result = mixer->mask_recsrc; 169 } else { 170 struct snd_mixer_oss_slot *pslot; 171 int chn; 172 for (chn = 0; chn < 31; chn++) { 173 pslot = &mixer->slots[chn]; 174 if (pslot->put_recsrc) 175 result |= 1 << chn; 176 } 177 } 178 return result; 179 } 180 181 static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer) 182 { 183 struct snd_mixer_oss *mixer = fmixer->mixer; 184 int result = 0; 185 186 if (mixer == NULL) 187 return -EIO; 188 guard(mutex)(&mixer->reg_mutex); 189 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */ 190 unsigned int index; 191 result = mixer->get_recsrc(fmixer, &index); 192 if (result < 0) 193 return result; 194 result = 1 << index; 195 } else { 196 struct snd_mixer_oss_slot *pslot; 197 int chn; 198 for (chn = 0; chn < 31; chn++) { 199 pslot = &mixer->slots[chn]; 200 if (pslot->get_recsrc) { 201 int active = 0; 202 pslot->get_recsrc(fmixer, pslot, &active); 203 if (active) 204 result |= 1 << chn; 205 } 206 } 207 } 208 mixer->oss_recsrc = result; 209 return result; 210 } 211 212 static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc) 213 { 214 struct snd_mixer_oss *mixer = fmixer->mixer; 215 struct snd_mixer_oss_slot *pslot; 216 int chn, active; 217 unsigned int index; 218 int result = 0; 219 220 if (mixer == NULL) 221 return -EIO; 222 guard(mutex)(&mixer->reg_mutex); 223 if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */ 224 if (recsrc & ~mixer->oss_recsrc) 225 recsrc &= ~mixer->oss_recsrc; 226 mixer->put_recsrc(fmixer, ffz(~recsrc)); 227 mixer->get_recsrc(fmixer, &index); 228 result = 1 << index; 229 } 230 for (chn = 0; chn < 31; chn++) { 231 pslot = &mixer->slots[chn]; 232 if (pslot->put_recsrc) { 233 active = (recsrc & (1 << chn)) ? 1 : 0; 234 pslot->put_recsrc(fmixer, pslot, active); 235 } 236 } 237 if (! result) { 238 for (chn = 0; chn < 31; chn++) { 239 pslot = &mixer->slots[chn]; 240 if (pslot->get_recsrc) { 241 active = 0; 242 pslot->get_recsrc(fmixer, pslot, &active); 243 if (active) 244 result |= 1 << chn; 245 } 246 } 247 } 248 return result; 249 } 250 251 static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot) 252 { 253 struct snd_mixer_oss *mixer = fmixer->mixer; 254 struct snd_mixer_oss_slot *pslot; 255 int result = 0, left, right; 256 257 if (mixer == NULL || slot > 30) 258 return -EIO; 259 guard(mutex)(&mixer->reg_mutex); 260 pslot = &mixer->slots[slot]; 261 left = pslot->volume[0]; 262 right = pslot->volume[1]; 263 if (pslot->get_volume) 264 result = pslot->get_volume(fmixer, pslot, &left, &right); 265 if (!pslot->stereo) 266 right = left; 267 if (snd_BUG_ON(left < 0 || left > 100)) 268 return -EIO; 269 if (snd_BUG_ON(right < 0 || right > 100)) 270 return -EIO; 271 if (result >= 0) { 272 pslot->volume[0] = left; 273 pslot->volume[1] = right; 274 result = (left & 0xff) | ((right & 0xff) << 8); 275 } 276 return result; 277 } 278 279 static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer, 280 int slot, int volume) 281 { 282 struct snd_mixer_oss *mixer = fmixer->mixer; 283 struct snd_mixer_oss_slot *pslot; 284 int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff; 285 286 if (mixer == NULL || slot > 30) 287 return -EIO; 288 guard(mutex)(&mixer->reg_mutex); 289 pslot = &mixer->slots[slot]; 290 if (left > 100) 291 left = 100; 292 if (right > 100) 293 right = 100; 294 if (!pslot->stereo) 295 right = left; 296 if (pslot->put_volume) 297 result = pslot->put_volume(fmixer, pslot, left, right); 298 if (result < 0) 299 return result; 300 pslot->volume[0] = left; 301 pslot->volume[1] = right; 302 result = (left & 0xff) | ((right & 0xff) << 8); 303 return result; 304 } 305 306 static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg) 307 { 308 void __user *argp = (void __user *)arg; 309 int __user *p = argp; 310 int tmp; 311 312 if (snd_BUG_ON(!fmixer)) 313 return -ENXIO; 314 if (((cmd >> 8) & 0xff) == 'M') { 315 switch (cmd) { 316 case SOUND_MIXER_INFO: 317 return snd_mixer_oss_info(fmixer, argp); 318 case SOUND_OLD_MIXER_INFO: 319 return snd_mixer_oss_info_obsolete(fmixer, argp); 320 case SOUND_MIXER_WRITE_RECSRC: 321 if (get_user(tmp, p)) 322 return -EFAULT; 323 tmp = snd_mixer_oss_set_recsrc(fmixer, tmp); 324 if (tmp < 0) 325 return tmp; 326 return put_user(tmp, p); 327 case OSS_GETVERSION: 328 return put_user(SNDRV_OSS_VERSION, p); 329 case OSS_ALSAEMULVER: 330 return put_user(1, p); 331 case SOUND_MIXER_READ_DEVMASK: 332 tmp = snd_mixer_oss_devmask(fmixer); 333 if (tmp < 0) 334 return tmp; 335 return put_user(tmp, p); 336 case SOUND_MIXER_READ_STEREODEVS: 337 tmp = snd_mixer_oss_stereodevs(fmixer); 338 if (tmp < 0) 339 return tmp; 340 return put_user(tmp, p); 341 case SOUND_MIXER_READ_RECMASK: 342 tmp = snd_mixer_oss_recmask(fmixer); 343 if (tmp < 0) 344 return tmp; 345 return put_user(tmp, p); 346 case SOUND_MIXER_READ_CAPS: 347 tmp = snd_mixer_oss_caps(fmixer); 348 if (tmp < 0) 349 return tmp; 350 return put_user(tmp, p); 351 case SOUND_MIXER_READ_RECSRC: 352 tmp = snd_mixer_oss_get_recsrc(fmixer); 353 if (tmp < 0) 354 return tmp; 355 return put_user(tmp, p); 356 } 357 } 358 if (cmd & SIOC_IN) { 359 if (get_user(tmp, p)) 360 return -EFAULT; 361 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp); 362 if (tmp < 0) 363 return tmp; 364 return put_user(tmp, p); 365 } else if (cmd & SIOC_OUT) { 366 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff); 367 if (tmp < 0) 368 return tmp; 369 return put_user(tmp, p); 370 } 371 return -ENXIO; 372 } 373 374 static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 375 { 376 return snd_mixer_oss_ioctl1(file->private_data, cmd, arg); 377 } 378 379 int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg) 380 { 381 struct snd_mixer_oss_file fmixer; 382 383 if (snd_BUG_ON(!card)) 384 return -ENXIO; 385 if (card->mixer_oss == NULL) 386 return -ENXIO; 387 memset(&fmixer, 0, sizeof(fmixer)); 388 fmixer.card = card; 389 fmixer.mixer = card->mixer_oss; 390 return snd_mixer_oss_ioctl1(&fmixer, cmd, arg); 391 } 392 EXPORT_SYMBOL(snd_mixer_oss_ioctl_card); 393 394 #ifdef CONFIG_COMPAT 395 /* all compatible */ 396 static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd, 397 unsigned long arg) 398 { 399 return snd_mixer_oss_ioctl1(file->private_data, cmd, 400 (unsigned long)compat_ptr(arg)); 401 } 402 #else 403 #define snd_mixer_oss_ioctl_compat NULL 404 #endif 405 406 /* 407 * REGISTRATION PART 408 */ 409 410 static const struct file_operations snd_mixer_oss_f_ops = 411 { 412 .owner = THIS_MODULE, 413 .open = snd_mixer_oss_open, 414 .release = snd_mixer_oss_release, 415 .unlocked_ioctl = snd_mixer_oss_ioctl, 416 .compat_ioctl = snd_mixer_oss_ioctl_compat, 417 }; 418 419 /* 420 * utilities 421 */ 422 423 static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax) 424 { 425 long orange = omax - omin, nrange = nmax - nmin; 426 427 if (orange == 0) 428 return 0; 429 return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin; 430 } 431 432 /* convert from alsa native to oss values (0-100) */ 433 static long snd_mixer_oss_conv1(long val, long min, long max, int *old) 434 { 435 if (val == snd_mixer_oss_conv(*old, 0, 100, min, max)) 436 return *old; 437 return snd_mixer_oss_conv(val, min, max, 0, 100); 438 } 439 440 /* convert from oss to alsa native values */ 441 static long snd_mixer_oss_conv2(long val, long min, long max) 442 { 443 return snd_mixer_oss_conv(val, 0, 100, min, max); 444 } 445 446 #if 0 447 static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot) 448 { 449 struct snd_mixer_oss *mixer = card->mixer_oss; 450 if (mixer) 451 mixer->mask_recsrc |= 1 << slot; 452 } 453 454 static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot) 455 { 456 struct snd_mixer_oss *mixer = card->mixer_oss; 457 if (mixer && (mixer->mask_recsrc & (1 << slot))) 458 return 1; 459 return 0; 460 } 461 #endif 462 463 #define SNDRV_MIXER_OSS_SIGNATURE 0x65999250 464 465 #define SNDRV_MIXER_OSS_ITEM_GLOBAL 0 466 #define SNDRV_MIXER_OSS_ITEM_GSWITCH 1 467 #define SNDRV_MIXER_OSS_ITEM_GROUTE 2 468 #define SNDRV_MIXER_OSS_ITEM_GVOLUME 3 469 #define SNDRV_MIXER_OSS_ITEM_PSWITCH 4 470 #define SNDRV_MIXER_OSS_ITEM_PROUTE 5 471 #define SNDRV_MIXER_OSS_ITEM_PVOLUME 6 472 #define SNDRV_MIXER_OSS_ITEM_CSWITCH 7 473 #define SNDRV_MIXER_OSS_ITEM_CROUTE 8 474 #define SNDRV_MIXER_OSS_ITEM_CVOLUME 9 475 #define SNDRV_MIXER_OSS_ITEM_CAPTURE 10 476 477 #define SNDRV_MIXER_OSS_ITEM_COUNT 11 478 479 #define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0) 480 #define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1) 481 #define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2) 482 #define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3) 483 #define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4) 484 #define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5) 485 #define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6) 486 #define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7) 487 #define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8) 488 #define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9) 489 #define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10) 490 491 struct slot { 492 unsigned int signature; 493 unsigned int present; 494 unsigned int channels; 495 unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT]; 496 unsigned int capture_item; 497 const struct snd_mixer_oss_assign_table *assigned; 498 unsigned int allocated: 1; 499 }; 500 501 #define ID_UNKNOWN ((unsigned int)-1) 502 503 static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index) 504 { 505 struct snd_card *card = mixer->card; 506 struct snd_ctl_elem_id id; 507 508 memset(&id, 0, sizeof(id)); 509 id.iface = SNDRV_CTL_ELEM_IFACE_MIXER; 510 strscpy(id.name, name, sizeof(id.name)); 511 id.index = index; 512 return snd_ctl_find_id(card, &id); 513 } 514 515 static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer, 516 struct snd_mixer_oss_slot *pslot, 517 unsigned int numid, 518 int *left, int *right) 519 { 520 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 521 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 522 struct snd_kcontrol *kctl; 523 struct snd_card *card = fmixer->card; 524 525 if (numid == ID_UNKNOWN) 526 return; 527 guard(rwsem_read)(&card->controls_rwsem); 528 kctl = snd_ctl_find_numid(card, numid); 529 if (!kctl) 530 return; 531 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 532 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 533 if (uinfo == NULL || uctl == NULL) 534 return; 535 if (kctl->info(kctl, uinfo)) 536 return; 537 if (kctl->get(kctl, uctl)) 538 return; 539 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN && 540 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1) 541 return; 542 *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]); 543 if (uinfo->count > 1) 544 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]); 545 } 546 547 static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer, 548 struct snd_mixer_oss_slot *pslot, 549 unsigned int numid, 550 int *left, int *right, 551 int route) 552 { 553 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 554 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 555 struct snd_kcontrol *kctl; 556 struct snd_card *card = fmixer->card; 557 558 if (numid == ID_UNKNOWN) 559 return; 560 guard(rwsem_read)(&card->controls_rwsem); 561 kctl = snd_ctl_find_numid(card, numid); 562 if (!kctl) 563 return; 564 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 565 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 566 if (uinfo == NULL || uctl == NULL) 567 return; 568 if (kctl->info(kctl, uinfo)) 569 return; 570 if (kctl->get(kctl, uctl)) 571 return; 572 if (!uctl->value.integer.value[0]) { 573 *left = 0; 574 if (uinfo->count == 1) 575 *right = 0; 576 } 577 if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1]) 578 *right = 0; 579 } 580 581 static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer, 582 struct snd_mixer_oss_slot *pslot, 583 int *left, int *right) 584 { 585 struct slot *slot = pslot->private_data; 586 587 *left = *right = 100; 588 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) { 589 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right); 590 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) { 591 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right); 592 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) { 593 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right); 594 } 595 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) { 596 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0); 597 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) { 598 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0); 599 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) { 600 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1); 601 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) { 602 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1); 603 } 604 return 0; 605 } 606 607 static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer, 608 struct snd_mixer_oss_slot *pslot, 609 unsigned int numid, 610 int left, int right) 611 { 612 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 613 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 614 struct snd_kcontrol *kctl; 615 struct snd_card *card = fmixer->card; 616 int res; 617 618 if (numid == ID_UNKNOWN) 619 return; 620 guard(rwsem_read)(&card->controls_rwsem); 621 kctl = snd_ctl_find_numid(card, numid); 622 if (!kctl) 623 return; 624 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 625 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 626 if (uinfo == NULL || uctl == NULL) 627 return; 628 if (kctl->info(kctl, uinfo)) 629 return; 630 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN && 631 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1) 632 return; 633 uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max); 634 if (uinfo->count > 1) 635 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max); 636 res = kctl->put(kctl, uctl); 637 if (res < 0) 638 return; 639 if (res > 0) 640 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); 641 } 642 643 static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer, 644 struct snd_mixer_oss_slot *pslot, 645 unsigned int numid, 646 int left, int right, 647 int route) 648 { 649 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 650 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 651 struct snd_kcontrol *kctl; 652 struct snd_card *card = fmixer->card; 653 int res; 654 655 if (numid == ID_UNKNOWN) 656 return; 657 guard(rwsem_read)(&card->controls_rwsem); 658 kctl = snd_ctl_find_numid(card, numid); 659 if (!kctl) 660 return; 661 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 662 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 663 if (uinfo == NULL || uctl == NULL) 664 return; 665 if (kctl->info(kctl, uinfo)) 666 return; 667 if (uinfo->count > 1) { 668 uctl->value.integer.value[0] = left > 0 ? 1 : 0; 669 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0; 670 if (route) { 671 uctl->value.integer.value[1] = 672 uctl->value.integer.value[2] = 0; 673 } 674 } else { 675 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0; 676 } 677 res = kctl->put(kctl, uctl); 678 if (res < 0) 679 return; 680 if (res > 0) 681 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); 682 } 683 684 static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer, 685 struct snd_mixer_oss_slot *pslot, 686 int left, int right) 687 { 688 struct slot *slot = pslot->private_data; 689 690 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) { 691 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right); 692 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) 693 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right); 694 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) { 695 snd_mixer_oss_put_volume1_vol(fmixer, pslot, 696 slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right); 697 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) { 698 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right); 699 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) { 700 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right); 701 } 702 if (left || right) { 703 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) 704 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0); 705 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) 706 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0); 707 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) 708 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0); 709 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) 710 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1); 711 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) 712 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1); 713 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) 714 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1); 715 } else { 716 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) { 717 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0); 718 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) { 719 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0); 720 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) { 721 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0); 722 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) { 723 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1); 724 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) { 725 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1); 726 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) { 727 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1); 728 } 729 } 730 return 0; 731 } 732 733 static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer, 734 struct snd_mixer_oss_slot *pslot, 735 int *active) 736 { 737 struct slot *slot = pslot->private_data; 738 int left, right; 739 740 left = right = 1; 741 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0); 742 *active = (left || right) ? 1 : 0; 743 return 0; 744 } 745 746 static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer, 747 struct snd_mixer_oss_slot *pslot, 748 int *active) 749 { 750 struct slot *slot = pslot->private_data; 751 int left, right; 752 753 left = right = 1; 754 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1); 755 *active = (left || right) ? 1 : 0; 756 return 0; 757 } 758 759 static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer, 760 struct snd_mixer_oss_slot *pslot, 761 int active) 762 { 763 struct slot *slot = pslot->private_data; 764 765 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0); 766 return 0; 767 } 768 769 static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer, 770 struct snd_mixer_oss_slot *pslot, 771 int active) 772 { 773 struct slot *slot = pslot->private_data; 774 775 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1); 776 return 0; 777 } 778 779 static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index) 780 { 781 struct snd_card *card = fmixer->card; 782 struct snd_mixer_oss *mixer = fmixer->mixer; 783 struct snd_kcontrol *kctl; 784 struct snd_mixer_oss_slot *pslot; 785 struct slot *slot; 786 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 787 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 788 int err, idx; 789 790 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 791 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 792 if (uinfo == NULL || uctl == NULL) 793 return -ENOMEM; 794 guard(rwsem_read)(&card->controls_rwsem); 795 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); 796 if (!kctl) 797 return -ENOENT; 798 err = kctl->info(kctl, uinfo); 799 if (err < 0) 800 return err; 801 err = kctl->get(kctl, uctl); 802 if (err < 0) 803 return err; 804 for (idx = 0; idx < 32; idx++) { 805 if (!(mixer->mask_recsrc & (1 << idx))) 806 continue; 807 pslot = &mixer->slots[idx]; 808 slot = pslot->private_data; 809 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE) 810 continue; 811 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE)) 812 continue; 813 if (slot->capture_item == uctl->value.enumerated.item[0]) { 814 *active_index = idx; 815 break; 816 } 817 } 818 return 0; 819 } 820 821 static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index) 822 { 823 struct snd_card *card = fmixer->card; 824 struct snd_mixer_oss *mixer = fmixer->mixer; 825 struct snd_kcontrol *kctl; 826 struct snd_mixer_oss_slot *pslot; 827 struct slot *slot = NULL; 828 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 829 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 830 int err; 831 unsigned int idx; 832 833 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 834 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 835 if (uinfo == NULL || uctl == NULL) 836 return -ENOMEM; 837 guard(rwsem_read)(&card->controls_rwsem); 838 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); 839 if (!kctl) 840 return -ENOENT; 841 err = kctl->info(kctl, uinfo); 842 if (err < 0) 843 return err; 844 for (idx = 0; idx < 32; idx++) { 845 if (!(mixer->mask_recsrc & (1 << idx))) 846 continue; 847 pslot = &mixer->slots[idx]; 848 slot = pslot->private_data; 849 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE) 850 continue; 851 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE)) 852 continue; 853 if (idx == active_index) 854 break; 855 slot = NULL; 856 } 857 if (!slot) 858 return 0; 859 for (idx = 0; idx < uinfo->count; idx++) 860 uctl->value.enumerated.item[idx] = slot->capture_item; 861 err = kctl->put(kctl, uctl); 862 if (err > 0) 863 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); 864 return 0; 865 } 866 867 struct snd_mixer_oss_assign_table { 868 int oss_id; 869 const char *name; 870 int index; 871 }; 872 873 static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item) 874 { 875 struct snd_ctl_elem_info *info __free(kfree) = NULL; 876 struct snd_kcontrol *kcontrol; 877 struct snd_card *card = mixer->card; 878 int err; 879 880 scoped_guard(rwsem_read, &card->controls_rwsem) { 881 kcontrol = snd_mixer_oss_test_id(mixer, name, index); 882 if (kcontrol == NULL) 883 return 0; 884 info = kmalloc(sizeof(*info), GFP_KERNEL); 885 if (!info) 886 return -ENOMEM; 887 err = kcontrol->info(kcontrol, info); 888 if (err < 0) 889 return err; 890 slot->numid[item] = kcontrol->id.numid; 891 } 892 if (info->count > slot->channels) 893 slot->channels = info->count; 894 slot->present |= 1 << item; 895 return 0; 896 } 897 898 static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn) 899 { 900 struct slot *p = chn->private_data; 901 if (p) { 902 if (p->allocated && p->assigned) { 903 kfree(p->assigned->name); 904 kfree(p->assigned); 905 } 906 kfree(p); 907 } 908 } 909 910 static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot) 911 { 912 int idx = rslot->number; /* remember this */ 913 if (rslot->private_free) 914 rslot->private_free(rslot); 915 memset(rslot, 0, sizeof(*rslot)); 916 rslot->number = idx; 917 } 918 919 /* In a separate function to keep gcc 3.2 happy - do NOT merge this in 920 snd_mixer_oss_build_input! */ 921 static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer, 922 const struct snd_mixer_oss_assign_table *ptr, 923 struct slot *slot) 924 { 925 char str[64]; 926 int err; 927 928 err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index, 929 SNDRV_MIXER_OSS_ITEM_GLOBAL); 930 if (err) 931 return err; 932 sprintf(str, "%s Switch", ptr->name); 933 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 934 SNDRV_MIXER_OSS_ITEM_GSWITCH); 935 if (err) 936 return err; 937 sprintf(str, "%s Route", ptr->name); 938 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 939 SNDRV_MIXER_OSS_ITEM_GROUTE); 940 if (err) 941 return err; 942 sprintf(str, "%s Volume", ptr->name); 943 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 944 SNDRV_MIXER_OSS_ITEM_GVOLUME); 945 if (err) 946 return err; 947 sprintf(str, "%s Playback Switch", ptr->name); 948 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 949 SNDRV_MIXER_OSS_ITEM_PSWITCH); 950 if (err) 951 return err; 952 sprintf(str, "%s Playback Route", ptr->name); 953 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 954 SNDRV_MIXER_OSS_ITEM_PROUTE); 955 if (err) 956 return err; 957 sprintf(str, "%s Playback Volume", ptr->name); 958 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 959 SNDRV_MIXER_OSS_ITEM_PVOLUME); 960 if (err) 961 return err; 962 sprintf(str, "%s Capture Switch", ptr->name); 963 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 964 SNDRV_MIXER_OSS_ITEM_CSWITCH); 965 if (err) 966 return err; 967 sprintf(str, "%s Capture Route", ptr->name); 968 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 969 SNDRV_MIXER_OSS_ITEM_CROUTE); 970 if (err) 971 return err; 972 sprintf(str, "%s Capture Volume", ptr->name); 973 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 974 SNDRV_MIXER_OSS_ITEM_CVOLUME); 975 if (err) 976 return err; 977 978 return 0; 979 } 980 981 /* 982 * build an OSS mixer element. 983 * ptr_allocated means the entry is dynamically allocated (change via proc file). 984 * when replace_old = 1, the old entry is replaced with the new one. 985 */ 986 static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer, 987 const struct snd_mixer_oss_assign_table *ptr, 988 int ptr_allocated, int replace_old) 989 { 990 struct slot slot; 991 struct slot *pslot; 992 struct snd_kcontrol *kctl; 993 struct snd_mixer_oss_slot *rslot; 994 char str[64]; 995 996 /* check if already assigned */ 997 if (mixer->slots[ptr->oss_id].get_volume && ! replace_old) 998 return 0; 999 1000 memset(&slot, 0, sizeof(slot)); 1001 memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */ 1002 if (snd_mixer_oss_build_test_all(mixer, ptr, &slot)) 1003 return 0; 1004 guard(rwsem_read)(&mixer->card->controls_rwsem); 1005 kctl = NULL; 1006 if (!ptr->index) 1007 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); 1008 if (kctl) { 1009 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 1010 1011 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 1012 if (!uinfo) 1013 return -ENOMEM; 1014 1015 if (kctl->info(kctl, uinfo)) 1016 return 0; 1017 strcpy(str, ptr->name); 1018 if (!strcmp(str, "Master")) 1019 strcpy(str, "Mix"); 1020 if (!strcmp(str, "Master Mono")) 1021 strcpy(str, "Mix Mono"); 1022 slot.capture_item = 0; 1023 if (!strcmp(uinfo->value.enumerated.name, str)) { 1024 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE; 1025 } else { 1026 for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) { 1027 uinfo->value.enumerated.item = slot.capture_item; 1028 if (kctl->info(kctl, uinfo)) 1029 return 0; 1030 if (!strcmp(uinfo->value.enumerated.name, str)) { 1031 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE; 1032 break; 1033 } 1034 } 1035 } 1036 } 1037 if (slot.present != 0) { 1038 pslot = kmalloc(sizeof(slot), GFP_KERNEL); 1039 if (! pslot) 1040 return -ENOMEM; 1041 *pslot = slot; 1042 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE; 1043 pslot->assigned = ptr; 1044 pslot->allocated = ptr_allocated; 1045 rslot = &mixer->slots[ptr->oss_id]; 1046 mixer_slot_clear(rslot); 1047 rslot->stereo = slot.channels > 1 ? 1 : 0; 1048 rslot->get_volume = snd_mixer_oss_get_volume1; 1049 rslot->put_volume = snd_mixer_oss_put_volume1; 1050 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */ 1051 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) { 1052 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw; 1053 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw; 1054 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) { 1055 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route; 1056 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route; 1057 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) { 1058 mixer->mask_recsrc |= 1 << ptr->oss_id; 1059 } 1060 rslot->private_data = pslot; 1061 rslot->private_free = snd_mixer_oss_slot_free; 1062 return 1; 1063 } 1064 return 0; 1065 } 1066 1067 #ifdef CONFIG_SND_PROC_FS 1068 /* 1069 */ 1070 #define MIXER_VOL(name) [SOUND_MIXER_##name] = #name 1071 static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = { 1072 MIXER_VOL(VOLUME), 1073 MIXER_VOL(BASS), 1074 MIXER_VOL(TREBLE), 1075 MIXER_VOL(SYNTH), 1076 MIXER_VOL(PCM), 1077 MIXER_VOL(SPEAKER), 1078 MIXER_VOL(LINE), 1079 MIXER_VOL(MIC), 1080 MIXER_VOL(CD), 1081 MIXER_VOL(IMIX), 1082 MIXER_VOL(ALTPCM), 1083 MIXER_VOL(RECLEV), 1084 MIXER_VOL(IGAIN), 1085 MIXER_VOL(OGAIN), 1086 MIXER_VOL(LINE1), 1087 MIXER_VOL(LINE2), 1088 MIXER_VOL(LINE3), 1089 MIXER_VOL(DIGITAL1), 1090 MIXER_VOL(DIGITAL2), 1091 MIXER_VOL(DIGITAL3), 1092 MIXER_VOL(PHONEIN), 1093 MIXER_VOL(PHONEOUT), 1094 MIXER_VOL(VIDEO), 1095 MIXER_VOL(RADIO), 1096 MIXER_VOL(MONITOR), 1097 }; 1098 1099 /* 1100 * /proc interface 1101 */ 1102 1103 static void snd_mixer_oss_proc_read(struct snd_info_entry *entry, 1104 struct snd_info_buffer *buffer) 1105 { 1106 struct snd_mixer_oss *mixer = entry->private_data; 1107 int i; 1108 1109 guard(mutex)(&mixer->reg_mutex); 1110 for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) { 1111 struct slot *p; 1112 1113 if (! oss_mixer_names[i]) 1114 continue; 1115 p = (struct slot *)mixer->slots[i].private_data; 1116 snd_iprintf(buffer, "%s ", oss_mixer_names[i]); 1117 if (p && p->assigned) 1118 snd_iprintf(buffer, "\"%s\" %d\n", 1119 p->assigned->name, 1120 p->assigned->index); 1121 else 1122 snd_iprintf(buffer, "\"\" 0\n"); 1123 } 1124 } 1125 1126 static void snd_mixer_oss_proc_write(struct snd_info_entry *entry, 1127 struct snd_info_buffer *buffer) 1128 { 1129 struct snd_mixer_oss *mixer = entry->private_data; 1130 char line[128], str[32], idxstr[16]; 1131 const char *cptr; 1132 unsigned int idx; 1133 int ch; 1134 struct snd_mixer_oss_assign_table *tbl; 1135 struct slot *slot; 1136 1137 while (!snd_info_get_line(buffer, line, sizeof(line))) { 1138 cptr = snd_info_get_str(str, line, sizeof(str)); 1139 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++) 1140 if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0) 1141 break; 1142 if (ch >= SNDRV_OSS_MAX_MIXERS) { 1143 pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n", 1144 str); 1145 continue; 1146 } 1147 cptr = snd_info_get_str(str, cptr, sizeof(str)); 1148 if (! *str) { 1149 /* remove the entry */ 1150 scoped_guard(mutex, &mixer->reg_mutex) 1151 mixer_slot_clear(&mixer->slots[ch]); 1152 continue; 1153 } 1154 snd_info_get_str(idxstr, cptr, sizeof(idxstr)); 1155 idx = simple_strtoul(idxstr, NULL, 10); 1156 if (idx >= 0x4000) { /* too big */ 1157 pr_err("ALSA: mixer_oss: invalid index %d\n", idx); 1158 continue; 1159 } 1160 scoped_guard(mutex, &mixer->reg_mutex) { 1161 slot = (struct slot *)mixer->slots[ch].private_data; 1162 if (slot && slot->assigned && 1163 slot->assigned->index == idx && !strcmp(slot->assigned->name, str)) 1164 /* not changed */ 1165 break; 1166 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL); 1167 if (!tbl) 1168 break; 1169 tbl->oss_id = ch; 1170 tbl->name = kstrdup(str, GFP_KERNEL); 1171 if (!tbl->name) { 1172 kfree(tbl); 1173 break; 1174 } 1175 tbl->index = idx; 1176 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) { 1177 kfree(tbl->name); 1178 kfree(tbl); 1179 } 1180 } 1181 } 1182 } 1183 1184 static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer) 1185 { 1186 struct snd_info_entry *entry; 1187 1188 entry = snd_info_create_card_entry(mixer->card, "oss_mixer", 1189 mixer->card->proc_root); 1190 if (! entry) 1191 return; 1192 entry->content = SNDRV_INFO_CONTENT_TEXT; 1193 entry->mode = S_IFREG | 0644; 1194 entry->c.text.read = snd_mixer_oss_proc_read; 1195 entry->c.text.write = snd_mixer_oss_proc_write; 1196 entry->private_data = mixer; 1197 if (snd_info_register(entry) < 0) { 1198 snd_info_free_entry(entry); 1199 entry = NULL; 1200 } 1201 mixer->proc_entry = entry; 1202 } 1203 1204 static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer) 1205 { 1206 snd_info_free_entry(mixer->proc_entry); 1207 mixer->proc_entry = NULL; 1208 } 1209 #else /* !CONFIG_SND_PROC_FS */ 1210 #define snd_mixer_oss_proc_init(mix) 1211 #define snd_mixer_oss_proc_done(mix) 1212 #endif /* CONFIG_SND_PROC_FS */ 1213 1214 static void snd_mixer_oss_build(struct snd_mixer_oss *mixer) 1215 { 1216 static const struct snd_mixer_oss_assign_table table[] = { 1217 { SOUND_MIXER_VOLUME, "Master", 0 }, 1218 { SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */ 1219 { SOUND_MIXER_BASS, "Tone Control - Bass", 0 }, 1220 { SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 }, 1221 { SOUND_MIXER_SYNTH, "Synth", 0 }, 1222 { SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */ 1223 { SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */ 1224 { SOUND_MIXER_PCM, "PCM", 0 }, 1225 { SOUND_MIXER_SPEAKER, "Beep", 0 }, 1226 { SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */ 1227 { SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */ 1228 { SOUND_MIXER_LINE, "Line", 0 }, 1229 { SOUND_MIXER_MIC, "Mic", 0 }, 1230 { SOUND_MIXER_CD, "CD", 0 }, 1231 { SOUND_MIXER_IMIX, "Monitor Mix", 0 }, 1232 { SOUND_MIXER_ALTPCM, "PCM", 1 }, 1233 { SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */ 1234 { SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */ 1235 { SOUND_MIXER_RECLEV, "-- nothing --", 0 }, 1236 { SOUND_MIXER_IGAIN, "Capture", 0 }, 1237 { SOUND_MIXER_OGAIN, "Playback", 0 }, 1238 { SOUND_MIXER_LINE1, "Aux", 0 }, 1239 { SOUND_MIXER_LINE2, "Aux", 1 }, 1240 { SOUND_MIXER_LINE3, "Aux", 2 }, 1241 { SOUND_MIXER_DIGITAL1, "Digital", 0 }, 1242 { SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */ 1243 { SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */ 1244 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */ 1245 { SOUND_MIXER_DIGITAL2, "Digital", 1 }, 1246 { SOUND_MIXER_DIGITAL3, "Digital", 2 }, 1247 { SOUND_MIXER_PHONEIN, "Phone", 0 }, 1248 { SOUND_MIXER_PHONEOUT, "Master Mono", 0 }, 1249 { SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/ 1250 { SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/ 1251 { SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */ 1252 { SOUND_MIXER_VIDEO, "Video", 0 }, 1253 { SOUND_MIXER_RADIO, "Radio", 0 }, 1254 { SOUND_MIXER_MONITOR, "Monitor", 0 } 1255 }; 1256 unsigned int idx; 1257 1258 for (idx = 0; idx < ARRAY_SIZE(table); idx++) 1259 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0); 1260 if (mixer->mask_recsrc) { 1261 mixer->get_recsrc = snd_mixer_oss_get_recsrc2; 1262 mixer->put_recsrc = snd_mixer_oss_put_recsrc2; 1263 } 1264 } 1265 1266 /* 1267 * 1268 */ 1269 1270 static int snd_mixer_oss_free1(void *private) 1271 { 1272 struct snd_mixer_oss *mixer = private; 1273 struct snd_card *card; 1274 int idx; 1275 1276 if (!mixer) 1277 return 0; 1278 card = mixer->card; 1279 if (snd_BUG_ON(mixer != card->mixer_oss)) 1280 return -ENXIO; 1281 card->mixer_oss = NULL; 1282 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) { 1283 struct snd_mixer_oss_slot *chn = &mixer->slots[idx]; 1284 if (chn->private_free) 1285 chn->private_free(chn); 1286 } 1287 kfree(mixer); 1288 return 0; 1289 } 1290 1291 static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd) 1292 { 1293 struct snd_mixer_oss *mixer; 1294 1295 if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) { 1296 int idx, err; 1297 1298 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL); 1299 if (mixer == NULL) 1300 return -ENOMEM; 1301 mutex_init(&mixer->reg_mutex); 1302 err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, 1303 card, 0, 1304 &snd_mixer_oss_f_ops, card); 1305 if (err < 0) { 1306 dev_err(card->dev, 1307 "unable to register OSS mixer device %i:%i\n", 1308 card->number, 0); 1309 kfree(mixer); 1310 return err; 1311 } 1312 mixer->oss_dev_alloc = 1; 1313 mixer->card = card; 1314 if (*card->mixername) 1315 strscpy(mixer->name, card->mixername, sizeof(mixer->name)); 1316 else 1317 snprintf(mixer->name, sizeof(mixer->name), 1318 "mixer%i", card->number); 1319 #ifdef SNDRV_OSS_INFO_DEV_MIXERS 1320 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS, 1321 card->number, 1322 mixer->name); 1323 #endif 1324 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) 1325 mixer->slots[idx].number = idx; 1326 card->mixer_oss = mixer; 1327 snd_mixer_oss_build(mixer); 1328 snd_mixer_oss_proc_init(mixer); 1329 } else { 1330 mixer = card->mixer_oss; 1331 if (mixer == NULL) 1332 return 0; 1333 if (mixer->oss_dev_alloc) { 1334 #ifdef SNDRV_OSS_INFO_DEV_MIXERS 1335 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number); 1336 #endif 1337 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0); 1338 mixer->oss_dev_alloc = 0; 1339 } 1340 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT) 1341 return 0; 1342 snd_mixer_oss_proc_done(mixer); 1343 return snd_mixer_oss_free1(mixer); 1344 } 1345 return 0; 1346 } 1347 1348 static int __init alsa_mixer_oss_init(void) 1349 { 1350 struct snd_card *card; 1351 int idx; 1352 1353 snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler; 1354 for (idx = 0; idx < SNDRV_CARDS; idx++) { 1355 card = snd_card_ref(idx); 1356 if (card) { 1357 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER); 1358 snd_card_unref(card); 1359 } 1360 } 1361 return 0; 1362 } 1363 1364 static void __exit alsa_mixer_oss_exit(void) 1365 { 1366 struct snd_card *card; 1367 int idx; 1368 1369 snd_mixer_oss_notify_callback = NULL; 1370 for (idx = 0; idx < SNDRV_CARDS; idx++) { 1371 card = snd_card_ref(idx); 1372 if (card) { 1373 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE); 1374 snd_card_unref(card); 1375 } 1376 } 1377 } 1378 1379 module_init(alsa_mixer_oss_init) 1380 module_exit(alsa_mixer_oss_exit) 1381