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 22MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 23MODULE_DESCRIPTION("Mixer OSS emulation for ALSA."); 24MODULE_LICENSE("GPL"); 25MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER); 26 27static 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 69static 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 82static 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 98static 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 113static 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 125static 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 142static 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 159static 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 181static 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 212static 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 251static 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 279static 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 306static 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 374static 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 379int 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} 392EXPORT_SYMBOL(snd_mixer_oss_ioctl_card); 393 394#ifdef CONFIG_COMPAT 395/* all compatible */ 396static 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 410static 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 .llseek = no_llseek, 416 .unlocked_ioctl = snd_mixer_oss_ioctl, 417 .compat_ioctl = snd_mixer_oss_ioctl_compat, 418}; 419 420/* 421 * utilities 422 */ 423 424static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax) 425{ 426 long orange = omax - omin, nrange = nmax - nmin; 427 428 if (orange == 0) 429 return 0; 430 return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin; 431} 432 433/* convert from alsa native to oss values (0-100) */ 434static long snd_mixer_oss_conv1(long val, long min, long max, int *old) 435{ 436 if (val == snd_mixer_oss_conv(*old, 0, 100, min, max)) 437 return *old; 438 return snd_mixer_oss_conv(val, min, max, 0, 100); 439} 440 441/* convert from oss to alsa native values */ 442static long snd_mixer_oss_conv2(long val, long min, long max) 443{ 444 return snd_mixer_oss_conv(val, 0, 100, min, max); 445} 446 447#if 0 448static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot) 449{ 450 struct snd_mixer_oss *mixer = card->mixer_oss; 451 if (mixer) 452 mixer->mask_recsrc |= 1 << slot; 453} 454 455static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot) 456{ 457 struct snd_mixer_oss *mixer = card->mixer_oss; 458 if (mixer && (mixer->mask_recsrc & (1 << slot))) 459 return 1; 460 return 0; 461} 462#endif 463 464#define SNDRV_MIXER_OSS_SIGNATURE 0x65999250 465 466#define SNDRV_MIXER_OSS_ITEM_GLOBAL 0 467#define SNDRV_MIXER_OSS_ITEM_GSWITCH 1 468#define SNDRV_MIXER_OSS_ITEM_GROUTE 2 469#define SNDRV_MIXER_OSS_ITEM_GVOLUME 3 470#define SNDRV_MIXER_OSS_ITEM_PSWITCH 4 471#define SNDRV_MIXER_OSS_ITEM_PROUTE 5 472#define SNDRV_MIXER_OSS_ITEM_PVOLUME 6 473#define SNDRV_MIXER_OSS_ITEM_CSWITCH 7 474#define SNDRV_MIXER_OSS_ITEM_CROUTE 8 475#define SNDRV_MIXER_OSS_ITEM_CVOLUME 9 476#define SNDRV_MIXER_OSS_ITEM_CAPTURE 10 477 478#define SNDRV_MIXER_OSS_ITEM_COUNT 11 479 480#define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0) 481#define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1) 482#define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2) 483#define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3) 484#define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4) 485#define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5) 486#define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6) 487#define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7) 488#define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8) 489#define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9) 490#define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10) 491 492struct slot { 493 unsigned int signature; 494 unsigned int present; 495 unsigned int channels; 496 unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT]; 497 unsigned int capture_item; 498 const struct snd_mixer_oss_assign_table *assigned; 499 unsigned int allocated: 1; 500}; 501 502#define ID_UNKNOWN ((unsigned int)-1) 503 504static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index) 505{ 506 struct snd_card *card = mixer->card; 507 struct snd_ctl_elem_id id; 508 509 memset(&id, 0, sizeof(id)); 510 id.iface = SNDRV_CTL_ELEM_IFACE_MIXER; 511 strscpy(id.name, name, sizeof(id.name)); 512 id.index = index; 513 return snd_ctl_find_id_locked(card, &id); 514} 515 516static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer, 517 struct snd_mixer_oss_slot *pslot, 518 unsigned int numid, 519 int *left, int *right) 520{ 521 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 522 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 523 struct snd_kcontrol *kctl; 524 struct snd_card *card = fmixer->card; 525 526 if (numid == ID_UNKNOWN) 527 return; 528 guard(rwsem_read)(&card->controls_rwsem); 529 kctl = snd_ctl_find_numid_locked(card, numid); 530 if (!kctl) 531 return; 532 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 533 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 534 if (uinfo == NULL || uctl == NULL) 535 return; 536 if (kctl->info(kctl, uinfo)) 537 return; 538 if (kctl->get(kctl, uctl)) 539 return; 540 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN && 541 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1) 542 return; 543 *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]); 544 if (uinfo->count > 1) 545 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]); 546} 547 548static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer, 549 struct snd_mixer_oss_slot *pslot, 550 unsigned int numid, 551 int *left, int *right, 552 int route) 553{ 554 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 555 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 556 struct snd_kcontrol *kctl; 557 struct snd_card *card = fmixer->card; 558 559 if (numid == ID_UNKNOWN) 560 return; 561 guard(rwsem_read)(&card->controls_rwsem); 562 kctl = snd_ctl_find_numid_locked(card, numid); 563 if (!kctl) 564 return; 565 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 566 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 567 if (uinfo == NULL || uctl == NULL) 568 return; 569 if (kctl->info(kctl, uinfo)) 570 return; 571 if (kctl->get(kctl, uctl)) 572 return; 573 if (!uctl->value.integer.value[0]) { 574 *left = 0; 575 if (uinfo->count == 1) 576 *right = 0; 577 } 578 if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1]) 579 *right = 0; 580} 581 582static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer, 583 struct snd_mixer_oss_slot *pslot, 584 int *left, int *right) 585{ 586 struct slot *slot = pslot->private_data; 587 588 *left = *right = 100; 589 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) { 590 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right); 591 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) { 592 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right); 593 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) { 594 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right); 595 } 596 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) { 597 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0); 598 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) { 599 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0); 600 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) { 601 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1); 602 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) { 603 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1); 604 } 605 return 0; 606} 607 608static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer, 609 struct snd_mixer_oss_slot *pslot, 610 unsigned int numid, 611 int left, int right) 612{ 613 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 614 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 615 struct snd_kcontrol *kctl; 616 struct snd_card *card = fmixer->card; 617 int res; 618 619 if (numid == ID_UNKNOWN) 620 return; 621 guard(rwsem_read)(&card->controls_rwsem); 622 kctl = snd_ctl_find_numid_locked(card, numid); 623 if (!kctl) 624 return; 625 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 626 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 627 if (uinfo == NULL || uctl == NULL) 628 return; 629 if (kctl->info(kctl, uinfo)) 630 return; 631 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN && 632 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1) 633 return; 634 uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max); 635 if (uinfo->count > 1) 636 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max); 637 res = kctl->put(kctl, uctl); 638 if (res < 0) 639 return; 640 if (res > 0) 641 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); 642} 643 644static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer, 645 struct snd_mixer_oss_slot *pslot, 646 unsigned int numid, 647 int left, int right, 648 int route) 649{ 650 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 651 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 652 struct snd_kcontrol *kctl; 653 struct snd_card *card = fmixer->card; 654 int res; 655 656 if (numid == ID_UNKNOWN) 657 return; 658 guard(rwsem_read)(&card->controls_rwsem); 659 kctl = snd_ctl_find_numid_locked(card, numid); 660 if (!kctl) 661 return; 662 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 663 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 664 if (uinfo == NULL || uctl == NULL) 665 return; 666 if (kctl->info(kctl, uinfo)) 667 return; 668 if (uinfo->count > 1) { 669 uctl->value.integer.value[0] = left > 0 ? 1 : 0; 670 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0; 671 if (route) { 672 uctl->value.integer.value[1] = 673 uctl->value.integer.value[2] = 0; 674 } 675 } else { 676 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0; 677 } 678 res = kctl->put(kctl, uctl); 679 if (res < 0) 680 return; 681 if (res > 0) 682 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); 683} 684 685static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer, 686 struct snd_mixer_oss_slot *pslot, 687 int left, int right) 688{ 689 struct slot *slot = pslot->private_data; 690 691 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) { 692 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right); 693 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) 694 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right); 695 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) { 696 snd_mixer_oss_put_volume1_vol(fmixer, pslot, 697 slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right); 698 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) { 699 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right); 700 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) { 701 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right); 702 } 703 if (left || right) { 704 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) 705 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0); 706 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) 707 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0); 708 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) 709 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0); 710 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) 711 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1); 712 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) 713 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1); 714 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) 715 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1); 716 } else { 717 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) { 718 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0); 719 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) { 720 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0); 721 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) { 722 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0); 723 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) { 724 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1); 725 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) { 726 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1); 727 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) { 728 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1); 729 } 730 } 731 return 0; 732} 733 734static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer, 735 struct snd_mixer_oss_slot *pslot, 736 int *active) 737{ 738 struct slot *slot = pslot->private_data; 739 int left, right; 740 741 left = right = 1; 742 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0); 743 *active = (left || right) ? 1 : 0; 744 return 0; 745} 746 747static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer, 748 struct snd_mixer_oss_slot *pslot, 749 int *active) 750{ 751 struct slot *slot = pslot->private_data; 752 int left, right; 753 754 left = right = 1; 755 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1); 756 *active = (left || right) ? 1 : 0; 757 return 0; 758} 759 760static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer, 761 struct snd_mixer_oss_slot *pslot, 762 int active) 763{ 764 struct slot *slot = pslot->private_data; 765 766 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0); 767 return 0; 768} 769 770static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer, 771 struct snd_mixer_oss_slot *pslot, 772 int active) 773{ 774 struct slot *slot = pslot->private_data; 775 776 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1); 777 return 0; 778} 779 780static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index) 781{ 782 struct snd_card *card = fmixer->card; 783 struct snd_mixer_oss *mixer = fmixer->mixer; 784 struct snd_kcontrol *kctl; 785 struct snd_mixer_oss_slot *pslot; 786 struct slot *slot; 787 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 788 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 789 int err, idx; 790 791 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 792 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 793 if (uinfo == NULL || uctl == NULL) 794 return -ENOMEM; 795 guard(rwsem_read)(&card->controls_rwsem); 796 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); 797 if (!kctl) 798 return -ENOENT; 799 err = kctl->info(kctl, uinfo); 800 if (err < 0) 801 return err; 802 err = kctl->get(kctl, uctl); 803 if (err < 0) 804 return err; 805 for (idx = 0; idx < 32; idx++) { 806 if (!(mixer->mask_recsrc & (1 << idx))) 807 continue; 808 pslot = &mixer->slots[idx]; 809 slot = pslot->private_data; 810 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE) 811 continue; 812 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE)) 813 continue; 814 if (slot->capture_item == uctl->value.enumerated.item[0]) { 815 *active_index = idx; 816 break; 817 } 818 } 819 return 0; 820} 821 822static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index) 823{ 824 struct snd_card *card = fmixer->card; 825 struct snd_mixer_oss *mixer = fmixer->mixer; 826 struct snd_kcontrol *kctl; 827 struct snd_mixer_oss_slot *pslot; 828 struct slot *slot = NULL; 829 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 830 struct snd_ctl_elem_value *uctl __free(kfree) = NULL; 831 int err; 832 unsigned int idx; 833 834 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 835 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); 836 if (uinfo == NULL || uctl == NULL) 837 return -ENOMEM; 838 guard(rwsem_read)(&card->controls_rwsem); 839 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); 840 if (!kctl) 841 return -ENOENT; 842 err = kctl->info(kctl, uinfo); 843 if (err < 0) 844 return err; 845 for (idx = 0; idx < 32; idx++) { 846 if (!(mixer->mask_recsrc & (1 << idx))) 847 continue; 848 pslot = &mixer->slots[idx]; 849 slot = pslot->private_data; 850 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE) 851 continue; 852 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE)) 853 continue; 854 if (idx == active_index) 855 break; 856 slot = NULL; 857 } 858 if (!slot) 859 return 0; 860 for (idx = 0; idx < uinfo->count; idx++) 861 uctl->value.enumerated.item[idx] = slot->capture_item; 862 err = kctl->put(kctl, uctl); 863 if (err > 0) 864 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); 865 return 0; 866} 867 868struct snd_mixer_oss_assign_table { 869 int oss_id; 870 const char *name; 871 int index; 872}; 873 874static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item) 875{ 876 struct snd_ctl_elem_info *info __free(kfree) = NULL; 877 struct snd_kcontrol *kcontrol; 878 struct snd_card *card = mixer->card; 879 int err; 880 881 scoped_guard(rwsem_read, &card->controls_rwsem) { 882 kcontrol = snd_mixer_oss_test_id(mixer, name, index); 883 if (kcontrol == NULL) 884 return 0; 885 info = kmalloc(sizeof(*info), GFP_KERNEL); 886 if (!info) 887 return -ENOMEM; 888 err = kcontrol->info(kcontrol, info); 889 if (err < 0) 890 return err; 891 slot->numid[item] = kcontrol->id.numid; 892 } 893 if (info->count > slot->channels) 894 slot->channels = info->count; 895 slot->present |= 1 << item; 896 return 0; 897} 898 899static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn) 900{ 901 struct slot *p = chn->private_data; 902 if (p) { 903 if (p->allocated && p->assigned) { 904 kfree_const(p->assigned->name); 905 kfree_const(p->assigned); 906 } 907 kfree(p); 908 } 909} 910 911static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot) 912{ 913 int idx = rslot->number; /* remember this */ 914 if (rslot->private_free) 915 rslot->private_free(rslot); 916 memset(rslot, 0, sizeof(*rslot)); 917 rslot->number = idx; 918} 919 920/* In a separate function to keep gcc 3.2 happy - do NOT merge this in 921 snd_mixer_oss_build_input! */ 922static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer, 923 const struct snd_mixer_oss_assign_table *ptr, 924 struct slot *slot) 925{ 926 char str[64]; 927 int err; 928 929 err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index, 930 SNDRV_MIXER_OSS_ITEM_GLOBAL); 931 if (err) 932 return err; 933 sprintf(str, "%s Switch", ptr->name); 934 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 935 SNDRV_MIXER_OSS_ITEM_GSWITCH); 936 if (err) 937 return err; 938 sprintf(str, "%s Route", ptr->name); 939 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 940 SNDRV_MIXER_OSS_ITEM_GROUTE); 941 if (err) 942 return err; 943 sprintf(str, "%s Volume", ptr->name); 944 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 945 SNDRV_MIXER_OSS_ITEM_GVOLUME); 946 if (err) 947 return err; 948 sprintf(str, "%s Playback Switch", ptr->name); 949 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 950 SNDRV_MIXER_OSS_ITEM_PSWITCH); 951 if (err) 952 return err; 953 sprintf(str, "%s Playback Route", ptr->name); 954 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 955 SNDRV_MIXER_OSS_ITEM_PROUTE); 956 if (err) 957 return err; 958 sprintf(str, "%s Playback Volume", ptr->name); 959 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 960 SNDRV_MIXER_OSS_ITEM_PVOLUME); 961 if (err) 962 return err; 963 sprintf(str, "%s Capture Switch", ptr->name); 964 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 965 SNDRV_MIXER_OSS_ITEM_CSWITCH); 966 if (err) 967 return err; 968 sprintf(str, "%s Capture Route", ptr->name); 969 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 970 SNDRV_MIXER_OSS_ITEM_CROUTE); 971 if (err) 972 return err; 973 sprintf(str, "%s Capture Volume", ptr->name); 974 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index, 975 SNDRV_MIXER_OSS_ITEM_CVOLUME); 976 if (err) 977 return err; 978 979 return 0; 980} 981 982/* 983 * build an OSS mixer element. 984 * ptr_allocated means the entry is dynamically allocated (change via proc file). 985 * when replace_old = 1, the old entry is replaced with the new one. 986 */ 987static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer, 988 const struct snd_mixer_oss_assign_table *ptr, 989 int ptr_allocated, int replace_old) 990{ 991 struct slot slot; 992 struct slot *pslot; 993 struct snd_kcontrol *kctl; 994 struct snd_mixer_oss_slot *rslot; 995 char str[64]; 996 997 /* check if already assigned */ 998 if (mixer->slots[ptr->oss_id].get_volume && ! replace_old) 999 return 0; 1000 1001 memset(&slot, 0, sizeof(slot)); 1002 memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */ 1003 if (snd_mixer_oss_build_test_all(mixer, ptr, &slot)) 1004 return 0; 1005 guard(rwsem_read)(&mixer->card->controls_rwsem); 1006 kctl = NULL; 1007 if (!ptr->index) 1008 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); 1009 if (kctl) { 1010 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; 1011 1012 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); 1013 if (!uinfo) 1014 return -ENOMEM; 1015 1016 if (kctl->info(kctl, uinfo)) 1017 return 0; 1018 strcpy(str, ptr->name); 1019 if (!strcmp(str, "Master")) 1020 strcpy(str, "Mix"); 1021 if (!strcmp(str, "Master Mono")) 1022 strcpy(str, "Mix Mono"); 1023 slot.capture_item = 0; 1024 if (!strcmp(uinfo->value.enumerated.name, str)) { 1025 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE; 1026 } else { 1027 for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) { 1028 uinfo->value.enumerated.item = slot.capture_item; 1029 if (kctl->info(kctl, uinfo)) 1030 return 0; 1031 if (!strcmp(uinfo->value.enumerated.name, str)) { 1032 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE; 1033 break; 1034 } 1035 } 1036 } 1037 } 1038 if (slot.present != 0) { 1039 pslot = kmalloc(sizeof(slot), GFP_KERNEL); 1040 if (! pslot) 1041 return -ENOMEM; 1042 *pslot = slot; 1043 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE; 1044 pslot->assigned = ptr; 1045 pslot->allocated = ptr_allocated; 1046 rslot = &mixer->slots[ptr->oss_id]; 1047 mixer_slot_clear(rslot); 1048 rslot->stereo = slot.channels > 1 ? 1 : 0; 1049 rslot->get_volume = snd_mixer_oss_get_volume1; 1050 rslot->put_volume = snd_mixer_oss_put_volume1; 1051 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */ 1052 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) { 1053 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw; 1054 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw; 1055 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) { 1056 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route; 1057 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route; 1058 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) { 1059 mixer->mask_recsrc |= 1 << ptr->oss_id; 1060 } 1061 rslot->private_data = pslot; 1062 rslot->private_free = snd_mixer_oss_slot_free; 1063 return 1; 1064 } 1065 return 0; 1066} 1067 1068#ifdef CONFIG_SND_PROC_FS 1069/* 1070 */ 1071#define MIXER_VOL(name) [SOUND_MIXER_##name] = #name 1072static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = { 1073 MIXER_VOL(VOLUME), 1074 MIXER_VOL(BASS), 1075 MIXER_VOL(TREBLE), 1076 MIXER_VOL(SYNTH), 1077 MIXER_VOL(PCM), 1078 MIXER_VOL(SPEAKER), 1079 MIXER_VOL(LINE), 1080 MIXER_VOL(MIC), 1081 MIXER_VOL(CD), 1082 MIXER_VOL(IMIX), 1083 MIXER_VOL(ALTPCM), 1084 MIXER_VOL(RECLEV), 1085 MIXER_VOL(IGAIN), 1086 MIXER_VOL(OGAIN), 1087 MIXER_VOL(LINE1), 1088 MIXER_VOL(LINE2), 1089 MIXER_VOL(LINE3), 1090 MIXER_VOL(DIGITAL1), 1091 MIXER_VOL(DIGITAL2), 1092 MIXER_VOL(DIGITAL3), 1093 MIXER_VOL(PHONEIN), 1094 MIXER_VOL(PHONEOUT), 1095 MIXER_VOL(VIDEO), 1096 MIXER_VOL(RADIO), 1097 MIXER_VOL(MONITOR), 1098}; 1099 1100/* 1101 * /proc interface 1102 */ 1103 1104static void snd_mixer_oss_proc_read(struct snd_info_entry *entry, 1105 struct snd_info_buffer *buffer) 1106{ 1107 struct snd_mixer_oss *mixer = entry->private_data; 1108 int i; 1109 1110 guard(mutex)(&mixer->reg_mutex); 1111 for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) { 1112 struct slot *p; 1113 1114 if (! oss_mixer_names[i]) 1115 continue; 1116 p = (struct slot *)mixer->slots[i].private_data; 1117 snd_iprintf(buffer, "%s ", oss_mixer_names[i]); 1118 if (p && p->assigned) 1119 snd_iprintf(buffer, "\"%s\" %d\n", 1120 p->assigned->name, 1121 p->assigned->index); 1122 else 1123 snd_iprintf(buffer, "\"\" 0\n"); 1124 } 1125} 1126 1127static void snd_mixer_oss_proc_write(struct snd_info_entry *entry, 1128 struct snd_info_buffer *buffer) 1129{ 1130 struct snd_mixer_oss *mixer = entry->private_data; 1131 char line[128], str[32], idxstr[16]; 1132 const char *cptr; 1133 unsigned int idx; 1134 int ch; 1135 struct snd_mixer_oss_assign_table *tbl; 1136 struct slot *slot; 1137 1138 while (!snd_info_get_line(buffer, line, sizeof(line))) { 1139 cptr = snd_info_get_str(str, line, sizeof(str)); 1140 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++) 1141 if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0) 1142 break; 1143 if (ch >= SNDRV_OSS_MAX_MIXERS) { 1144 pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n", 1145 str); 1146 continue; 1147 } 1148 cptr = snd_info_get_str(str, cptr, sizeof(str)); 1149 if (! *str) { 1150 /* remove the entry */ 1151 scoped_guard(mutex, &mixer->reg_mutex) 1152 mixer_slot_clear(&mixer->slots[ch]); 1153 continue; 1154 } 1155 snd_info_get_str(idxstr, cptr, sizeof(idxstr)); 1156 idx = simple_strtoul(idxstr, NULL, 10); 1157 if (idx >= 0x4000) { /* too big */ 1158 pr_err("ALSA: mixer_oss: invalid index %d\n", idx); 1159 continue; 1160 } 1161 scoped_guard(mutex, &mixer->reg_mutex) { 1162 slot = (struct slot *)mixer->slots[ch].private_data; 1163 if (slot && slot->assigned && 1164 slot->assigned->index == idx && !strcmp(slot->assigned->name, str)) 1165 /* not changed */ 1166 break; 1167 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL); 1168 if (!tbl) 1169 break; 1170 tbl->oss_id = ch; 1171 tbl->name = kstrdup(str, GFP_KERNEL); 1172 if (!tbl->name) { 1173 kfree(tbl); 1174 break; 1175 } 1176 tbl->index = idx; 1177 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) { 1178 kfree(tbl->name); 1179 kfree(tbl); 1180 } 1181 } 1182 } 1183} 1184 1185static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer) 1186{ 1187 struct snd_info_entry *entry; 1188 1189 entry = snd_info_create_card_entry(mixer->card, "oss_mixer", 1190 mixer->card->proc_root); 1191 if (! entry) 1192 return; 1193 entry->content = SNDRV_INFO_CONTENT_TEXT; 1194 entry->mode = S_IFREG | 0644; 1195 entry->c.text.read = snd_mixer_oss_proc_read; 1196 entry->c.text.write = snd_mixer_oss_proc_write; 1197 entry->private_data = mixer; 1198 if (snd_info_register(entry) < 0) { 1199 snd_info_free_entry(entry); 1200 entry = NULL; 1201 } 1202 mixer->proc_entry = entry; 1203} 1204 1205static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer) 1206{ 1207 snd_info_free_entry(mixer->proc_entry); 1208 mixer->proc_entry = NULL; 1209} 1210#else /* !CONFIG_SND_PROC_FS */ 1211#define snd_mixer_oss_proc_init(mix) 1212#define snd_mixer_oss_proc_done(mix) 1213#endif /* CONFIG_SND_PROC_FS */ 1214 1215static void snd_mixer_oss_build(struct snd_mixer_oss *mixer) 1216{ 1217 static const struct snd_mixer_oss_assign_table table[] = { 1218 { SOUND_MIXER_VOLUME, "Master", 0 }, 1219 { SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */ 1220 { SOUND_MIXER_BASS, "Tone Control - Bass", 0 }, 1221 { SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 }, 1222 { SOUND_MIXER_SYNTH, "Synth", 0 }, 1223 { SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */ 1224 { SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */ 1225 { SOUND_MIXER_PCM, "PCM", 0 }, 1226 { SOUND_MIXER_SPEAKER, "Beep", 0 }, 1227 { SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */ 1228 { SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */ 1229 { SOUND_MIXER_LINE, "Line", 0 }, 1230 { SOUND_MIXER_MIC, "Mic", 0 }, 1231 { SOUND_MIXER_CD, "CD", 0 }, 1232 { SOUND_MIXER_IMIX, "Monitor Mix", 0 }, 1233 { SOUND_MIXER_ALTPCM, "PCM", 1 }, 1234 { SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */ 1235 { SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */ 1236 { SOUND_MIXER_RECLEV, "-- nothing --", 0 }, 1237 { SOUND_MIXER_IGAIN, "Capture", 0 }, 1238 { SOUND_MIXER_OGAIN, "Playback", 0 }, 1239 { SOUND_MIXER_LINE1, "Aux", 0 }, 1240 { SOUND_MIXER_LINE2, "Aux", 1 }, 1241 { SOUND_MIXER_LINE3, "Aux", 2 }, 1242 { SOUND_MIXER_DIGITAL1, "Digital", 0 }, 1243 { SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */ 1244 { SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */ 1245 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */ 1246 { SOUND_MIXER_DIGITAL2, "Digital", 1 }, 1247 { SOUND_MIXER_DIGITAL3, "Digital", 2 }, 1248 { SOUND_MIXER_PHONEIN, "Phone", 0 }, 1249 { SOUND_MIXER_PHONEOUT, "Master Mono", 0 }, 1250 { SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/ 1251 { SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/ 1252 { SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */ 1253 { SOUND_MIXER_VIDEO, "Video", 0 }, 1254 { SOUND_MIXER_RADIO, "Radio", 0 }, 1255 { SOUND_MIXER_MONITOR, "Monitor", 0 } 1256 }; 1257 unsigned int idx; 1258 1259 for (idx = 0; idx < ARRAY_SIZE(table); idx++) 1260 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0); 1261 if (mixer->mask_recsrc) { 1262 mixer->get_recsrc = snd_mixer_oss_get_recsrc2; 1263 mixer->put_recsrc = snd_mixer_oss_put_recsrc2; 1264 } 1265} 1266 1267/* 1268 * 1269 */ 1270 1271static int snd_mixer_oss_free1(void *private) 1272{ 1273 struct snd_mixer_oss *mixer = private; 1274 struct snd_card *card; 1275 int idx; 1276 1277 if (!mixer) 1278 return 0; 1279 card = mixer->card; 1280 if (snd_BUG_ON(mixer != card->mixer_oss)) 1281 return -ENXIO; 1282 card->mixer_oss = NULL; 1283 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) { 1284 struct snd_mixer_oss_slot *chn = &mixer->slots[idx]; 1285 if (chn->private_free) 1286 chn->private_free(chn); 1287 } 1288 kfree(mixer); 1289 return 0; 1290} 1291 1292static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd) 1293{ 1294 struct snd_mixer_oss *mixer; 1295 1296 if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) { 1297 int idx, err; 1298 1299 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL); 1300 if (mixer == NULL) 1301 return -ENOMEM; 1302 mutex_init(&mixer->reg_mutex); 1303 err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, 1304 card, 0, 1305 &snd_mixer_oss_f_ops, card); 1306 if (err < 0) { 1307 dev_err(card->dev, 1308 "unable to register OSS mixer device %i:%i\n", 1309 card->number, 0); 1310 kfree(mixer); 1311 return err; 1312 } 1313 mixer->oss_dev_alloc = 1; 1314 mixer->card = card; 1315 if (*card->mixername) 1316 strscpy(mixer->name, card->mixername, sizeof(mixer->name)); 1317 else 1318 snprintf(mixer->name, sizeof(mixer->name), 1319 "mixer%i", card->number); 1320#ifdef SNDRV_OSS_INFO_DEV_MIXERS 1321 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS, 1322 card->number, 1323 mixer->name); 1324#endif 1325 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) 1326 mixer->slots[idx].number = idx; 1327 card->mixer_oss = mixer; 1328 snd_mixer_oss_build(mixer); 1329 snd_mixer_oss_proc_init(mixer); 1330 } else { 1331 mixer = card->mixer_oss; 1332 if (mixer == NULL) 1333 return 0; 1334 if (mixer->oss_dev_alloc) { 1335#ifdef SNDRV_OSS_INFO_DEV_MIXERS 1336 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number); 1337#endif 1338 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0); 1339 mixer->oss_dev_alloc = 0; 1340 } 1341 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT) 1342 return 0; 1343 snd_mixer_oss_proc_done(mixer); 1344 return snd_mixer_oss_free1(mixer); 1345 } 1346 return 0; 1347} 1348 1349static int __init alsa_mixer_oss_init(void) 1350{ 1351 struct snd_card *card; 1352 int idx; 1353 1354 snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler; 1355 for (idx = 0; idx < SNDRV_CARDS; idx++) { 1356 card = snd_card_ref(idx); 1357 if (card) { 1358 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER); 1359 snd_card_unref(card); 1360 } 1361 } 1362 return 0; 1363} 1364 1365static void __exit alsa_mixer_oss_exit(void) 1366{ 1367 struct snd_card *card; 1368 int idx; 1369 1370 snd_mixer_oss_notify_callback = NULL; 1371 for (idx = 0; idx < SNDRV_CARDS; idx++) { 1372 card = snd_card_ref(idx); 1373 if (card) { 1374 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE); 1375 snd_card_unref(card); 1376 } 1377 } 1378} 1379 1380module_init(alsa_mixer_oss_init) 1381module_exit(alsa_mixer_oss_exit) 1382