1 /* 2 * (Tentative) USB Audio Driver for ALSA 3 * 4 * Mixer control part 5 * 6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> 7 * 8 * Many codes borrowed from audio.c by 9 * Alan Cox (alan@lxorguk.ukuu.org.uk) 10 * Thomas Sailer (sailer@ife.ee.ethz.ch) 11 * 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 26 * 27 */ 28 29 /* 30 * TODOs, for both the mixer and the streaming interfaces: 31 * 32 * - support for UAC2 effect units 33 * - support for graphical equalizers 34 * - RANGE and MEM set commands (UAC2) 35 * - RANGE and MEM interrupt dispatchers (UAC2) 36 * - audio channel clustering (UAC2) 37 * - audio sample rate converter units (UAC2) 38 * - proper handling of clock multipliers (UAC2) 39 * - dispatch clock change notifications (UAC2) 40 * - stop PCM streams which use a clock that became invalid 41 * - stop PCM streams which use a clock selector that has changed 42 * - parse available sample rates again when clock sources changed 43 */ 44 45 #include <linux/bitops.h> 46 #include <linux/init.h> 47 #include <linux/list.h> 48 #include <linux/slab.h> 49 #include <linux/string.h> 50 #include <linux/usb.h> 51 #include <linux/usb/audio.h> 52 #include <linux/usb/audio-v2.h> 53 54 #include <sound/core.h> 55 #include <sound/control.h> 56 #include <sound/hwdep.h> 57 #include <sound/info.h> 58 #include <sound/tlv.h> 59 60 #include "usbaudio.h" 61 #include "mixer.h" 62 #include "helper.h" 63 #include "mixer_quirks.h" 64 #include "power.h" 65 66 #define MAX_ID_ELEMS 256 67 68 struct usb_audio_term { 69 int id; 70 int type; 71 int channels; 72 unsigned int chconfig; 73 int name; 74 }; 75 76 struct usbmix_name_map; 77 78 struct mixer_build { 79 struct snd_usb_audio *chip; 80 struct usb_mixer_interface *mixer; 81 unsigned char *buffer; 82 unsigned int buflen; 83 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS); 84 struct usb_audio_term oterm; 85 const struct usbmix_name_map *map; 86 const struct usbmix_selector_map *selector_map; 87 }; 88 89 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/ 90 enum { 91 USB_XU_CLOCK_RATE = 0xe301, 92 USB_XU_CLOCK_SOURCE = 0xe302, 93 USB_XU_DIGITAL_IO_STATUS = 0xe303, 94 USB_XU_DEVICE_OPTIONS = 0xe304, 95 USB_XU_DIRECT_MONITORING = 0xe305, 96 USB_XU_METERING = 0xe306 97 }; 98 enum { 99 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/ 100 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */ 101 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */ 102 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */ 103 }; 104 105 /* 106 * manual mapping of mixer names 107 * if the mixer topology is too complicated and the parsed names are 108 * ambiguous, add the entries in usbmixer_maps.c. 109 */ 110 #include "mixer_maps.c" 111 112 static const struct usbmix_name_map * 113 find_map(struct mixer_build *state, int unitid, int control) 114 { 115 const struct usbmix_name_map *p = state->map; 116 117 if (!p) 118 return NULL; 119 120 for (p = state->map; p->id; p++) { 121 if (p->id == unitid && 122 (!control || !p->control || control == p->control)) 123 return p; 124 } 125 return NULL; 126 } 127 128 /* get the mapped name if the unit matches */ 129 static int 130 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen) 131 { 132 if (!p || !p->name) 133 return 0; 134 135 buflen--; 136 return strlcpy(buf, p->name, buflen); 137 } 138 139 /* ignore the error value if ignore_ctl_error flag is set */ 140 #define filter_error(cval, err) \ 141 ((cval)->head.mixer->ignore_ctl_error ? 0 : (err)) 142 143 /* check whether the control should be ignored */ 144 static inline int 145 check_ignored_ctl(const struct usbmix_name_map *p) 146 { 147 if (!p || p->name || p->dB) 148 return 0; 149 return 1; 150 } 151 152 /* dB mapping */ 153 static inline void check_mapped_dB(const struct usbmix_name_map *p, 154 struct usb_mixer_elem_info *cval) 155 { 156 if (p && p->dB) { 157 cval->dBmin = p->dB->min; 158 cval->dBmax = p->dB->max; 159 cval->initialized = 1; 160 } 161 } 162 163 /* get the mapped selector source name */ 164 static int check_mapped_selector_name(struct mixer_build *state, int unitid, 165 int index, char *buf, int buflen) 166 { 167 const struct usbmix_selector_map *p; 168 169 if (!state->selector_map) 170 return 0; 171 for (p = state->selector_map; p->id; p++) { 172 if (p->id == unitid && index < p->count) 173 return strlcpy(buf, p->names[index], buflen); 174 } 175 return 0; 176 } 177 178 /* 179 * find an audio control unit with the given unit id 180 */ 181 static void *find_audio_control_unit(struct mixer_build *state, 182 unsigned char unit) 183 { 184 /* we just parse the header */ 185 struct uac_feature_unit_descriptor *hdr = NULL; 186 187 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr, 188 USB_DT_CS_INTERFACE)) != NULL) { 189 if (hdr->bLength >= 4 && 190 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL && 191 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER && 192 hdr->bUnitID == unit) 193 return hdr; 194 } 195 196 return NULL; 197 } 198 199 /* 200 * copy a string with the given id 201 */ 202 static int snd_usb_copy_string_desc(struct mixer_build *state, 203 int index, char *buf, int maxlen) 204 { 205 int len = usb_string(state->chip->dev, index, buf, maxlen - 1); 206 buf[len] = 0; 207 return len; 208 } 209 210 /* 211 * convert from the byte/word on usb descriptor to the zero-based integer 212 */ 213 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val) 214 { 215 switch (cval->val_type) { 216 case USB_MIXER_BOOLEAN: 217 return !!val; 218 case USB_MIXER_INV_BOOLEAN: 219 return !val; 220 case USB_MIXER_U8: 221 val &= 0xff; 222 break; 223 case USB_MIXER_S8: 224 val &= 0xff; 225 if (val >= 0x80) 226 val -= 0x100; 227 break; 228 case USB_MIXER_U16: 229 val &= 0xffff; 230 break; 231 case USB_MIXER_S16: 232 val &= 0xffff; 233 if (val >= 0x8000) 234 val -= 0x10000; 235 break; 236 } 237 return val; 238 } 239 240 /* 241 * convert from the zero-based int to the byte/word for usb descriptor 242 */ 243 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val) 244 { 245 switch (cval->val_type) { 246 case USB_MIXER_BOOLEAN: 247 return !!val; 248 case USB_MIXER_INV_BOOLEAN: 249 return !val; 250 case USB_MIXER_S8: 251 case USB_MIXER_U8: 252 return val & 0xff; 253 case USB_MIXER_S16: 254 case USB_MIXER_U16: 255 return val & 0xffff; 256 } 257 return 0; /* not reached */ 258 } 259 260 static int get_relative_value(struct usb_mixer_elem_info *cval, int val) 261 { 262 if (!cval->res) 263 cval->res = 1; 264 if (val < cval->min) 265 return 0; 266 else if (val >= cval->max) 267 return (cval->max - cval->min + cval->res - 1) / cval->res; 268 else 269 return (val - cval->min) / cval->res; 270 } 271 272 static int get_abs_value(struct usb_mixer_elem_info *cval, int val) 273 { 274 if (val < 0) 275 return cval->min; 276 if (!cval->res) 277 cval->res = 1; 278 val *= cval->res; 279 val += cval->min; 280 if (val > cval->max) 281 return cval->max; 282 return val; 283 } 284 285 static int uac2_ctl_value_size(int val_type) 286 { 287 switch (val_type) { 288 case USB_MIXER_S32: 289 case USB_MIXER_U32: 290 return 4; 291 case USB_MIXER_S16: 292 case USB_MIXER_U16: 293 return 2; 294 default: 295 return 1; 296 } 297 return 0; /* unreachable */ 298 } 299 300 301 /* 302 * retrieve a mixer value 303 */ 304 305 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, 306 int validx, int *value_ret) 307 { 308 struct snd_usb_audio *chip = cval->head.mixer->chip; 309 unsigned char buf[2]; 310 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 311 int timeout = 10; 312 int idx = 0, err; 313 314 err = snd_usb_lock_shutdown(chip); 315 if (err < 0) 316 return -EIO; 317 318 while (timeout-- > 0) { 319 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 320 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request, 321 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 322 validx, idx, buf, val_len) >= val_len) { 323 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); 324 err = 0; 325 goto out; 326 } 327 } 328 usb_audio_dbg(chip, 329 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 330 request, validx, idx, cval->val_type); 331 err = -EINVAL; 332 333 out: 334 snd_usb_unlock_shutdown(chip); 335 return err; 336 } 337 338 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, 339 int validx, int *value_ret) 340 { 341 struct snd_usb_audio *chip = cval->head.mixer->chip; 342 unsigned char buf[4 + 3 * sizeof(__u32)]; /* enough space for one range */ 343 unsigned char *val; 344 int idx = 0, ret, size; 345 __u8 bRequest; 346 347 if (request == UAC_GET_CUR) { 348 bRequest = UAC2_CS_CUR; 349 size = uac2_ctl_value_size(cval->val_type); 350 } else { 351 bRequest = UAC2_CS_RANGE; 352 size = sizeof(buf); 353 } 354 355 memset(buf, 0, sizeof(buf)); 356 357 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0; 358 if (ret) 359 goto error; 360 361 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 362 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest, 363 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 364 validx, idx, buf, size); 365 snd_usb_unlock_shutdown(chip); 366 367 if (ret < 0) { 368 error: 369 usb_audio_err(chip, 370 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 371 request, validx, idx, cval->val_type); 372 return ret; 373 } 374 375 /* FIXME: how should we handle multiple triplets here? */ 376 377 switch (request) { 378 case UAC_GET_CUR: 379 val = buf; 380 break; 381 case UAC_GET_MIN: 382 val = buf + sizeof(__u16); 383 break; 384 case UAC_GET_MAX: 385 val = buf + sizeof(__u16) * 2; 386 break; 387 case UAC_GET_RES: 388 val = buf + sizeof(__u16) * 3; 389 break; 390 default: 391 return -EINVAL; 392 } 393 394 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16))); 395 396 return 0; 397 } 398 399 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, 400 int validx, int *value_ret) 401 { 402 validx += cval->idx_off; 403 404 return (cval->head.mixer->protocol == UAC_VERSION_1) ? 405 get_ctl_value_v1(cval, request, validx, value_ret) : 406 get_ctl_value_v2(cval, request, validx, value_ret); 407 } 408 409 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, 410 int validx, int *value) 411 { 412 return get_ctl_value(cval, UAC_GET_CUR, validx, value); 413 } 414 415 /* channel = 0: master, 1 = first channel */ 416 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval, 417 int channel, int *value) 418 { 419 return get_ctl_value(cval, UAC_GET_CUR, 420 (cval->control << 8) | channel, 421 value); 422 } 423 424 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, 425 int channel, int index, int *value) 426 { 427 int err; 428 429 if (cval->cached & (1 << channel)) { 430 *value = cval->cache_val[index]; 431 return 0; 432 } 433 err = get_cur_mix_raw(cval, channel, value); 434 if (err < 0) { 435 if (!cval->head.mixer->ignore_ctl_error) 436 usb_audio_dbg(cval->head.mixer->chip, 437 "cannot get current value for control %d ch %d: err = %d\n", 438 cval->control, channel, err); 439 return err; 440 } 441 cval->cached |= 1 << channel; 442 cval->cache_val[index] = *value; 443 return 0; 444 } 445 446 /* 447 * set a mixer value 448 */ 449 450 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, 451 int request, int validx, int value_set) 452 { 453 struct snd_usb_audio *chip = cval->head.mixer->chip; 454 unsigned char buf[4]; 455 int idx = 0, val_len, err, timeout = 10; 456 457 validx += cval->idx_off; 458 459 if (cval->head.mixer->protocol == UAC_VERSION_1) { 460 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 461 } else { /* UAC_VERSION_2 */ 462 val_len = uac2_ctl_value_size(cval->val_type); 463 464 /* FIXME */ 465 if (request != UAC_SET_CUR) { 466 usb_audio_dbg(chip, "RANGE setting not yet supported\n"); 467 return -EINVAL; 468 } 469 470 request = UAC2_CS_CUR; 471 } 472 473 value_set = convert_bytes_value(cval, value_set); 474 buf[0] = value_set & 0xff; 475 buf[1] = (value_set >> 8) & 0xff; 476 buf[2] = (value_set >> 16) & 0xff; 477 buf[3] = (value_set >> 24) & 0xff; 478 479 err = snd_usb_lock_shutdown(chip); 480 if (err < 0) 481 return -EIO; 482 483 while (timeout-- > 0) { 484 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 485 if (snd_usb_ctl_msg(chip->dev, 486 usb_sndctrlpipe(chip->dev, 0), request, 487 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, 488 validx, idx, buf, val_len) >= 0) { 489 err = 0; 490 goto out; 491 } 492 } 493 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", 494 request, validx, idx, cval->val_type, buf[0], buf[1]); 495 err = -EINVAL; 496 497 out: 498 snd_usb_unlock_shutdown(chip); 499 return err; 500 } 501 502 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, 503 int validx, int value) 504 { 505 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value); 506 } 507 508 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, 509 int index, int value) 510 { 511 int err; 512 unsigned int read_only = (channel == 0) ? 513 cval->master_readonly : 514 cval->ch_readonly & (1 << (channel - 1)); 515 516 if (read_only) { 517 usb_audio_dbg(cval->head.mixer->chip, 518 "%s(): channel %d of control %d is read_only\n", 519 __func__, channel, cval->control); 520 return 0; 521 } 522 523 err = snd_usb_mixer_set_ctl_value(cval, 524 UAC_SET_CUR, (cval->control << 8) | channel, 525 value); 526 if (err < 0) 527 return err; 528 cval->cached |= 1 << channel; 529 cval->cache_val[index] = value; 530 return 0; 531 } 532 533 /* 534 * TLV callback for mixer volume controls 535 */ 536 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, 537 unsigned int size, unsigned int __user *_tlv) 538 { 539 struct usb_mixer_elem_info *cval = kcontrol->private_data; 540 DECLARE_TLV_DB_MINMAX(scale, 0, 0); 541 542 if (size < sizeof(scale)) 543 return -ENOMEM; 544 scale[2] = cval->dBmin; 545 scale[3] = cval->dBmax; 546 if (copy_to_user(_tlv, scale, sizeof(scale))) 547 return -EFAULT; 548 return 0; 549 } 550 551 /* 552 * parser routines begin here... 553 */ 554 555 static int parse_audio_unit(struct mixer_build *state, int unitid); 556 557 558 /* 559 * check if the input/output channel routing is enabled on the given bitmap. 560 * used for mixer unit parser 561 */ 562 static int check_matrix_bitmap(unsigned char *bmap, 563 int ich, int och, int num_outs) 564 { 565 int idx = ich * num_outs + och; 566 return bmap[idx >> 3] & (0x80 >> (idx & 7)); 567 } 568 569 /* 570 * add an alsa control element 571 * search and increment the index until an empty slot is found. 572 * 573 * if failed, give up and free the control instance. 574 */ 575 576 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list, 577 struct snd_kcontrol *kctl) 578 { 579 struct usb_mixer_interface *mixer = list->mixer; 580 int err; 581 582 while (snd_ctl_find_id(mixer->chip->card, &kctl->id)) 583 kctl->id.index++; 584 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) { 585 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n", 586 err); 587 return err; 588 } 589 list->kctl = kctl; 590 list->next_id_elem = mixer->id_elems[list->id]; 591 mixer->id_elems[list->id] = list; 592 return 0; 593 } 594 595 /* 596 * get a terminal name string 597 */ 598 599 static struct iterm_name_combo { 600 int type; 601 char *name; 602 } iterm_names[] = { 603 { 0x0300, "Output" }, 604 { 0x0301, "Speaker" }, 605 { 0x0302, "Headphone" }, 606 { 0x0303, "HMD Audio" }, 607 { 0x0304, "Desktop Speaker" }, 608 { 0x0305, "Room Speaker" }, 609 { 0x0306, "Com Speaker" }, 610 { 0x0307, "LFE" }, 611 { 0x0600, "External In" }, 612 { 0x0601, "Analog In" }, 613 { 0x0602, "Digital In" }, 614 { 0x0603, "Line" }, 615 { 0x0604, "Legacy In" }, 616 { 0x0605, "IEC958 In" }, 617 { 0x0606, "1394 DA Stream" }, 618 { 0x0607, "1394 DV Stream" }, 619 { 0x0700, "Embedded" }, 620 { 0x0701, "Noise Source" }, 621 { 0x0702, "Equalization Noise" }, 622 { 0x0703, "CD" }, 623 { 0x0704, "DAT" }, 624 { 0x0705, "DCC" }, 625 { 0x0706, "MiniDisk" }, 626 { 0x0707, "Analog Tape" }, 627 { 0x0708, "Phonograph" }, 628 { 0x0709, "VCR Audio" }, 629 { 0x070a, "Video Disk Audio" }, 630 { 0x070b, "DVD Audio" }, 631 { 0x070c, "TV Tuner Audio" }, 632 { 0x070d, "Satellite Rec Audio" }, 633 { 0x070e, "Cable Tuner Audio" }, 634 { 0x070f, "DSS Audio" }, 635 { 0x0710, "Radio Receiver" }, 636 { 0x0711, "Radio Transmitter" }, 637 { 0x0712, "Multi-Track Recorder" }, 638 { 0x0713, "Synthesizer" }, 639 { 0 }, 640 }; 641 642 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm, 643 unsigned char *name, int maxlen, int term_only) 644 { 645 struct iterm_name_combo *names; 646 647 if (iterm->name) 648 return snd_usb_copy_string_desc(state, iterm->name, 649 name, maxlen); 650 651 /* virtual type - not a real terminal */ 652 if (iterm->type >> 16) { 653 if (term_only) 654 return 0; 655 switch (iterm->type >> 16) { 656 case UAC_SELECTOR_UNIT: 657 strcpy(name, "Selector"); 658 return 8; 659 case UAC1_PROCESSING_UNIT: 660 strcpy(name, "Process Unit"); 661 return 12; 662 case UAC1_EXTENSION_UNIT: 663 strcpy(name, "Ext Unit"); 664 return 8; 665 case UAC_MIXER_UNIT: 666 strcpy(name, "Mixer"); 667 return 5; 668 default: 669 return sprintf(name, "Unit %d", iterm->id); 670 } 671 } 672 673 switch (iterm->type & 0xff00) { 674 case 0x0100: 675 strcpy(name, "PCM"); 676 return 3; 677 case 0x0200: 678 strcpy(name, "Mic"); 679 return 3; 680 case 0x0400: 681 strcpy(name, "Headset"); 682 return 7; 683 case 0x0500: 684 strcpy(name, "Phone"); 685 return 5; 686 } 687 688 for (names = iterm_names; names->type; names++) { 689 if (names->type == iterm->type) { 690 strcpy(name, names->name); 691 return strlen(names->name); 692 } 693 } 694 695 return 0; 696 } 697 698 /* 699 * parse the source unit recursively until it reaches to a terminal 700 * or a branched unit. 701 */ 702 static int check_input_term(struct mixer_build *state, int id, 703 struct usb_audio_term *term) 704 { 705 int err; 706 void *p1; 707 708 memset(term, 0, sizeof(*term)); 709 while ((p1 = find_audio_control_unit(state, id)) != NULL) { 710 unsigned char *hdr = p1; 711 term->id = id; 712 switch (hdr[2]) { 713 case UAC_INPUT_TERMINAL: 714 if (state->mixer->protocol == UAC_VERSION_1) { 715 struct uac_input_terminal_descriptor *d = p1; 716 term->type = le16_to_cpu(d->wTerminalType); 717 term->channels = d->bNrChannels; 718 term->chconfig = le16_to_cpu(d->wChannelConfig); 719 term->name = d->iTerminal; 720 } else { /* UAC_VERSION_2 */ 721 struct uac2_input_terminal_descriptor *d = p1; 722 723 /* call recursively to verify that the 724 * referenced clock entity is valid */ 725 err = check_input_term(state, d->bCSourceID, term); 726 if (err < 0) 727 return err; 728 729 /* save input term properties after recursion, 730 * to ensure they are not overriden by the 731 * recursion calls */ 732 term->id = id; 733 term->type = le16_to_cpu(d->wTerminalType); 734 term->channels = d->bNrChannels; 735 term->chconfig = le32_to_cpu(d->bmChannelConfig); 736 term->name = d->iTerminal; 737 } 738 return 0; 739 case UAC_FEATURE_UNIT: { 740 /* the header is the same for v1 and v2 */ 741 struct uac_feature_unit_descriptor *d = p1; 742 id = d->bSourceID; 743 break; /* continue to parse */ 744 } 745 case UAC_MIXER_UNIT: { 746 struct uac_mixer_unit_descriptor *d = p1; 747 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 748 term->channels = uac_mixer_unit_bNrChannels(d); 749 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol); 750 term->name = uac_mixer_unit_iMixer(d); 751 return 0; 752 } 753 case UAC_SELECTOR_UNIT: 754 case UAC2_CLOCK_SELECTOR: { 755 struct uac_selector_unit_descriptor *d = p1; 756 /* call recursively to retrieve the channel info */ 757 err = check_input_term(state, d->baSourceID[0], term); 758 if (err < 0) 759 return err; 760 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 761 term->id = id; 762 term->name = uac_selector_unit_iSelector(d); 763 return 0; 764 } 765 case UAC1_PROCESSING_UNIT: 766 case UAC1_EXTENSION_UNIT: 767 /* UAC2_PROCESSING_UNIT_V2 */ 768 /* UAC2_EFFECT_UNIT */ 769 case UAC2_EXTENSION_UNIT_V2: { 770 struct uac_processing_unit_descriptor *d = p1; 771 772 if (state->mixer->protocol == UAC_VERSION_2 && 773 hdr[2] == UAC2_EFFECT_UNIT) { 774 /* UAC2/UAC1 unit IDs overlap here in an 775 * uncompatible way. Ignore this unit for now. 776 */ 777 return 0; 778 } 779 780 if (d->bNrInPins) { 781 id = d->baSourceID[0]; 782 break; /* continue to parse */ 783 } 784 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 785 term->channels = uac_processing_unit_bNrChannels(d); 786 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol); 787 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol); 788 return 0; 789 } 790 case UAC2_CLOCK_SOURCE: { 791 struct uac_clock_source_descriptor *d = p1; 792 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 793 term->id = id; 794 term->name = d->iClockSource; 795 return 0; 796 } 797 default: 798 return -ENODEV; 799 } 800 } 801 return -ENODEV; 802 } 803 804 /* 805 * Feature Unit 806 */ 807 808 /* feature unit control information */ 809 struct usb_feature_control_info { 810 const char *name; 811 int type; /* data type for uac1 */ 812 int type_uac2; /* data type for uac2 if different from uac1, else -1 */ 813 }; 814 815 static struct usb_feature_control_info audio_feature_info[] = { 816 { "Mute", USB_MIXER_INV_BOOLEAN, -1 }, 817 { "Volume", USB_MIXER_S16, -1 }, 818 { "Tone Control - Bass", USB_MIXER_S8, -1 }, 819 { "Tone Control - Mid", USB_MIXER_S8, -1 }, 820 { "Tone Control - Treble", USB_MIXER_S8, -1 }, 821 { "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemeted yet */ 822 { "Auto Gain Control", USB_MIXER_BOOLEAN, -1 }, 823 { "Delay Control", USB_MIXER_U16, USB_MIXER_U32 }, 824 { "Bass Boost", USB_MIXER_BOOLEAN, -1 }, 825 { "Loudness", USB_MIXER_BOOLEAN, -1 }, 826 /* UAC2 specific */ 827 { "Input Gain Control", USB_MIXER_S16, -1 }, 828 { "Input Gain Pad Control", USB_MIXER_S16, -1 }, 829 { "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 }, 830 }; 831 832 /* private_free callback */ 833 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl) 834 { 835 kfree(kctl->private_data); 836 kctl->private_data = NULL; 837 } 838 839 /* 840 * interface to ALSA control for feature/mixer units 841 */ 842 843 /* volume control quirks */ 844 static void volume_control_quirks(struct usb_mixer_elem_info *cval, 845 struct snd_kcontrol *kctl) 846 { 847 struct snd_usb_audio *chip = cval->head.mixer->chip; 848 switch (chip->usb_id) { 849 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ 850 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */ 851 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 852 cval->min = 0x0000; 853 cval->max = 0xffff; 854 cval->res = 0x00e6; 855 break; 856 } 857 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 858 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 859 cval->min = 0x00; 860 cval->max = 0xff; 861 break; 862 } 863 if (strstr(kctl->id.name, "Effect Return") != NULL) { 864 cval->min = 0xb706; 865 cval->max = 0xff7b; 866 cval->res = 0x0073; 867 break; 868 } 869 if ((strstr(kctl->id.name, "Playback Volume") != NULL) || 870 (strstr(kctl->id.name, "Effect Send") != NULL)) { 871 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */ 872 cval->max = 0xfcfe; 873 cval->res = 0x0073; 874 } 875 break; 876 877 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */ 878 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */ 879 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 880 usb_audio_info(chip, 881 "set quirk for FTU Effect Duration\n"); 882 cval->min = 0x0000; 883 cval->max = 0x7f00; 884 cval->res = 0x0100; 885 break; 886 } 887 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 888 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 889 usb_audio_info(chip, 890 "set quirks for FTU Effect Feedback/Volume\n"); 891 cval->min = 0x00; 892 cval->max = 0x7f; 893 break; 894 } 895 break; 896 897 case USB_ID(0x0471, 0x0101): 898 case USB_ID(0x0471, 0x0104): 899 case USB_ID(0x0471, 0x0105): 900 case USB_ID(0x0672, 0x1041): 901 /* quirk for UDA1321/N101. 902 * note that detection between firmware 2.1.1.7 (N101) 903 * and later 2.1.1.21 is not very clear from datasheets. 904 * I hope that the min value is -15360 for newer firmware --jk 905 */ 906 if (!strcmp(kctl->id.name, "PCM Playback Volume") && 907 cval->min == -15616) { 908 usb_audio_info(chip, 909 "set volume quirk for UDA1321/N101 chip\n"); 910 cval->max = -256; 911 } 912 break; 913 914 case USB_ID(0x046d, 0x09a4): 915 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 916 usb_audio_info(chip, 917 "set volume quirk for QuickCam E3500\n"); 918 cval->min = 6080; 919 cval->max = 8768; 920 cval->res = 192; 921 } 922 break; 923 924 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */ 925 case USB_ID(0x046d, 0x0808): 926 case USB_ID(0x046d, 0x0809): 927 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */ 928 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */ 929 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */ 930 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */ 931 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */ 932 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */ 933 case USB_ID(0x046d, 0x0991): 934 /* Most audio usb devices lie about volume resolution. 935 * Most Logitech webcams have res = 384. 936 * Proboly there is some logitech magic behind this number --fishor 937 */ 938 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 939 usb_audio_info(chip, 940 "set resolution quirk: cval->res = 384\n"); 941 cval->res = 384; 942 } 943 break; 944 } 945 } 946 947 /* 948 * retrieve the minimum and maximum values for the specified control 949 */ 950 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval, 951 int default_min, struct snd_kcontrol *kctl) 952 { 953 /* for failsafe */ 954 cval->min = default_min; 955 cval->max = cval->min + 1; 956 cval->res = 1; 957 cval->dBmin = cval->dBmax = 0; 958 959 if (cval->val_type == USB_MIXER_BOOLEAN || 960 cval->val_type == USB_MIXER_INV_BOOLEAN) { 961 cval->initialized = 1; 962 } else { 963 int minchn = 0; 964 if (cval->cmask) { 965 int i; 966 for (i = 0; i < MAX_CHANNELS; i++) 967 if (cval->cmask & (1 << i)) { 968 minchn = i + 1; 969 break; 970 } 971 } 972 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 || 973 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) { 974 usb_audio_err(cval->head.mixer->chip, 975 "%d:%d: cannot get min/max values for control %d (id %d)\n", 976 cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip), 977 cval->control, cval->head.id); 978 return -EINVAL; 979 } 980 if (get_ctl_value(cval, UAC_GET_RES, 981 (cval->control << 8) | minchn, 982 &cval->res) < 0) { 983 cval->res = 1; 984 } else { 985 int last_valid_res = cval->res; 986 987 while (cval->res > 1) { 988 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES, 989 (cval->control << 8) | minchn, 990 cval->res / 2) < 0) 991 break; 992 cval->res /= 2; 993 } 994 if (get_ctl_value(cval, UAC_GET_RES, 995 (cval->control << 8) | minchn, &cval->res) < 0) 996 cval->res = last_valid_res; 997 } 998 if (cval->res == 0) 999 cval->res = 1; 1000 1001 /* Additional checks for the proper resolution 1002 * 1003 * Some devices report smaller resolutions than actually 1004 * reacting. They don't return errors but simply clip 1005 * to the lower aligned value. 1006 */ 1007 if (cval->min + cval->res < cval->max) { 1008 int last_valid_res = cval->res; 1009 int saved, test, check; 1010 get_cur_mix_raw(cval, minchn, &saved); 1011 for (;;) { 1012 test = saved; 1013 if (test < cval->max) 1014 test += cval->res; 1015 else 1016 test -= cval->res; 1017 if (test < cval->min || test > cval->max || 1018 snd_usb_set_cur_mix_value(cval, minchn, 0, test) || 1019 get_cur_mix_raw(cval, minchn, &check)) { 1020 cval->res = last_valid_res; 1021 break; 1022 } 1023 if (test == check) 1024 break; 1025 cval->res *= 2; 1026 } 1027 snd_usb_set_cur_mix_value(cval, minchn, 0, saved); 1028 } 1029 1030 cval->initialized = 1; 1031 } 1032 1033 if (kctl) 1034 volume_control_quirks(cval, kctl); 1035 1036 /* USB descriptions contain the dB scale in 1/256 dB unit 1037 * while ALSA TLV contains in 1/100 dB unit 1038 */ 1039 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; 1040 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; 1041 if (cval->dBmin > cval->dBmax) { 1042 /* something is wrong; assume it's either from/to 0dB */ 1043 if (cval->dBmin < 0) 1044 cval->dBmax = 0; 1045 else if (cval->dBmin > 0) 1046 cval->dBmin = 0; 1047 if (cval->dBmin > cval->dBmax) { 1048 /* totally crap, return an error */ 1049 return -EINVAL; 1050 } 1051 } 1052 1053 return 0; 1054 } 1055 1056 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL) 1057 1058 /* get a feature/mixer unit info */ 1059 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, 1060 struct snd_ctl_elem_info *uinfo) 1061 { 1062 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1063 1064 if (cval->val_type == USB_MIXER_BOOLEAN || 1065 cval->val_type == USB_MIXER_INV_BOOLEAN) 1066 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 1067 else 1068 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 1069 uinfo->count = cval->channels; 1070 if (cval->val_type == USB_MIXER_BOOLEAN || 1071 cval->val_type == USB_MIXER_INV_BOOLEAN) { 1072 uinfo->value.integer.min = 0; 1073 uinfo->value.integer.max = 1; 1074 } else { 1075 if (!cval->initialized) { 1076 get_min_max_with_quirks(cval, 0, kcontrol); 1077 if (cval->initialized && cval->dBmin >= cval->dBmax) { 1078 kcontrol->vd[0].access &= 1079 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1080 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); 1081 snd_ctl_notify(cval->head.mixer->chip->card, 1082 SNDRV_CTL_EVENT_MASK_INFO, 1083 &kcontrol->id); 1084 } 1085 } 1086 uinfo->value.integer.min = 0; 1087 uinfo->value.integer.max = 1088 (cval->max - cval->min + cval->res - 1) / cval->res; 1089 } 1090 return 0; 1091 } 1092 1093 /* get the current value from feature/mixer unit */ 1094 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, 1095 struct snd_ctl_elem_value *ucontrol) 1096 { 1097 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1098 int c, cnt, val, err; 1099 1100 ucontrol->value.integer.value[0] = cval->min; 1101 if (cval->cmask) { 1102 cnt = 0; 1103 for (c = 0; c < MAX_CHANNELS; c++) { 1104 if (!(cval->cmask & (1 << c))) 1105 continue; 1106 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val); 1107 if (err < 0) 1108 return filter_error(cval, err); 1109 val = get_relative_value(cval, val); 1110 ucontrol->value.integer.value[cnt] = val; 1111 cnt++; 1112 } 1113 return 0; 1114 } else { 1115 /* master channel */ 1116 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val); 1117 if (err < 0) 1118 return filter_error(cval, err); 1119 val = get_relative_value(cval, val); 1120 ucontrol->value.integer.value[0] = val; 1121 } 1122 return 0; 1123 } 1124 1125 /* put the current value to feature/mixer unit */ 1126 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, 1127 struct snd_ctl_elem_value *ucontrol) 1128 { 1129 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1130 int c, cnt, val, oval, err; 1131 int changed = 0; 1132 1133 if (cval->cmask) { 1134 cnt = 0; 1135 for (c = 0; c < MAX_CHANNELS; c++) { 1136 if (!(cval->cmask & (1 << c))) 1137 continue; 1138 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval); 1139 if (err < 0) 1140 return filter_error(cval, err); 1141 val = ucontrol->value.integer.value[cnt]; 1142 val = get_abs_value(cval, val); 1143 if (oval != val) { 1144 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val); 1145 changed = 1; 1146 } 1147 cnt++; 1148 } 1149 } else { 1150 /* master channel */ 1151 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval); 1152 if (err < 0) 1153 return filter_error(cval, err); 1154 val = ucontrol->value.integer.value[0]; 1155 val = get_abs_value(cval, val); 1156 if (val != oval) { 1157 snd_usb_set_cur_mix_value(cval, 0, 0, val); 1158 changed = 1; 1159 } 1160 } 1161 return changed; 1162 } 1163 1164 static struct snd_kcontrol_new usb_feature_unit_ctl = { 1165 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1166 .name = "", /* will be filled later manually */ 1167 .info = mixer_ctl_feature_info, 1168 .get = mixer_ctl_feature_get, 1169 .put = mixer_ctl_feature_put, 1170 }; 1171 1172 /* the read-only variant */ 1173 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = { 1174 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1175 .name = "", /* will be filled later manually */ 1176 .info = mixer_ctl_feature_info, 1177 .get = mixer_ctl_feature_get, 1178 .put = NULL, 1179 }; 1180 1181 /* 1182 * This symbol is exported in order to allow the mixer quirks to 1183 * hook up to the standard feature unit control mechanism 1184 */ 1185 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl; 1186 1187 /* 1188 * build a feature control 1189 */ 1190 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str) 1191 { 1192 return strlcat(kctl->id.name, str, sizeof(kctl->id.name)); 1193 } 1194 1195 /* 1196 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we 1197 * rename it to "Headphone". We determine if something is a headphone 1198 * similar to how udev determines form factor. 1199 */ 1200 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl, 1201 struct snd_card *card) 1202 { 1203 const char *names_to_check[] = { 1204 "Headset", "headset", "Headphone", "headphone", NULL}; 1205 const char **s; 1206 bool found = false; 1207 1208 if (strcmp("Speaker", kctl->id.name)) 1209 return; 1210 1211 for (s = names_to_check; *s; s++) 1212 if (strstr(card->shortname, *s)) { 1213 found = true; 1214 break; 1215 } 1216 1217 if (!found) 1218 return; 1219 1220 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name)); 1221 } 1222 1223 static void build_feature_ctl(struct mixer_build *state, void *raw_desc, 1224 unsigned int ctl_mask, int control, 1225 struct usb_audio_term *iterm, int unitid, 1226 int readonly_mask) 1227 { 1228 struct uac_feature_unit_descriptor *desc = raw_desc; 1229 struct usb_feature_control_info *ctl_info; 1230 unsigned int len = 0; 1231 int mapped_name = 0; 1232 int nameid = uac_feature_unit_iFeature(desc); 1233 struct snd_kcontrol *kctl; 1234 struct usb_mixer_elem_info *cval; 1235 const struct usbmix_name_map *map; 1236 unsigned int range; 1237 1238 control++; /* change from zero-based to 1-based value */ 1239 1240 if (control == UAC_FU_GRAPHIC_EQUALIZER) { 1241 /* FIXME: not supported yet */ 1242 return; 1243 } 1244 1245 map = find_map(state, unitid, control); 1246 if (check_ignored_ctl(map)) 1247 return; 1248 1249 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1250 if (!cval) 1251 return; 1252 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1253 cval->control = control; 1254 cval->cmask = ctl_mask; 1255 ctl_info = &audio_feature_info[control-1]; 1256 if (state->mixer->protocol == UAC_VERSION_1) 1257 cval->val_type = ctl_info->type; 1258 else /* UAC_VERSION_2 */ 1259 cval->val_type = ctl_info->type_uac2 >= 0 ? 1260 ctl_info->type_uac2 : ctl_info->type; 1261 1262 if (ctl_mask == 0) { 1263 cval->channels = 1; /* master channel */ 1264 cval->master_readonly = readonly_mask; 1265 } else { 1266 int i, c = 0; 1267 for (i = 0; i < 16; i++) 1268 if (ctl_mask & (1 << i)) 1269 c++; 1270 cval->channels = c; 1271 cval->ch_readonly = readonly_mask; 1272 } 1273 1274 /* 1275 * If all channels in the mask are marked read-only, make the control 1276 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't 1277 * issue write commands to read-only channels. 1278 */ 1279 if (cval->channels == readonly_mask) 1280 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); 1281 else 1282 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1283 1284 if (!kctl) { 1285 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 1286 kfree(cval); 1287 return; 1288 } 1289 kctl->private_free = snd_usb_mixer_elem_free; 1290 1291 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1292 mapped_name = len != 0; 1293 if (!len && nameid) 1294 len = snd_usb_copy_string_desc(state, nameid, 1295 kctl->id.name, sizeof(kctl->id.name)); 1296 1297 switch (control) { 1298 case UAC_FU_MUTE: 1299 case UAC_FU_VOLUME: 1300 /* 1301 * determine the control name. the rule is: 1302 * - if a name id is given in descriptor, use it. 1303 * - if the connected input can be determined, then use the name 1304 * of terminal type. 1305 * - if the connected output can be determined, use it. 1306 * - otherwise, anonymous name. 1307 */ 1308 if (!len) { 1309 len = get_term_name(state, iterm, kctl->id.name, 1310 sizeof(kctl->id.name), 1); 1311 if (!len) 1312 len = get_term_name(state, &state->oterm, 1313 kctl->id.name, 1314 sizeof(kctl->id.name), 1); 1315 if (!len) 1316 snprintf(kctl->id.name, sizeof(kctl->id.name), 1317 "Feature %d", unitid); 1318 } 1319 1320 if (!mapped_name) 1321 check_no_speaker_on_headset(kctl, state->mixer->chip->card); 1322 1323 /* 1324 * determine the stream direction: 1325 * if the connected output is USB stream, then it's likely a 1326 * capture stream. otherwise it should be playback (hopefully :) 1327 */ 1328 if (!mapped_name && !(state->oterm.type >> 16)) { 1329 if ((state->oterm.type & 0xff00) == 0x0100) 1330 append_ctl_name(kctl, " Capture"); 1331 else 1332 append_ctl_name(kctl, " Playback"); 1333 } 1334 append_ctl_name(kctl, control == UAC_FU_MUTE ? 1335 " Switch" : " Volume"); 1336 break; 1337 default: 1338 if (!len) 1339 strlcpy(kctl->id.name, audio_feature_info[control-1].name, 1340 sizeof(kctl->id.name)); 1341 break; 1342 } 1343 1344 /* get min/max values */ 1345 get_min_max_with_quirks(cval, 0, kctl); 1346 1347 if (control == UAC_FU_VOLUME) { 1348 check_mapped_dB(map, cval); 1349 if (cval->dBmin < cval->dBmax || !cval->initialized) { 1350 kctl->tlv.c = snd_usb_mixer_vol_tlv; 1351 kctl->vd[0].access |= 1352 SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1353 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; 1354 } 1355 } 1356 1357 snd_usb_mixer_fu_apply_quirk(state->mixer, cval, unitid, kctl); 1358 1359 range = (cval->max - cval->min) / cval->res; 1360 /* 1361 * Are there devices with volume range more than 255? I use a bit more 1362 * to be sure. 384 is a resolution magic number found on Logitech 1363 * devices. It will definitively catch all buggy Logitech devices. 1364 */ 1365 if (range > 384) { 1366 usb_audio_warn(state->chip, 1367 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.", 1368 range); 1369 usb_audio_warn(state->chip, 1370 "[%d] FU [%s] ch = %d, val = %d/%d/%d", 1371 cval->head.id, kctl->id.name, cval->channels, 1372 cval->min, cval->max, cval->res); 1373 } 1374 1375 usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n", 1376 cval->head.id, kctl->id.name, cval->channels, 1377 cval->min, cval->max, cval->res); 1378 snd_usb_mixer_add_control(&cval->head, kctl); 1379 } 1380 1381 /* 1382 * parse a feature unit 1383 * 1384 * most of controls are defined here. 1385 */ 1386 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, 1387 void *_ftr) 1388 { 1389 int channels, i, j; 1390 struct usb_audio_term iterm; 1391 unsigned int master_bits, first_ch_bits; 1392 int err, csize; 1393 struct uac_feature_unit_descriptor *hdr = _ftr; 1394 __u8 *bmaControls; 1395 1396 if (state->mixer->protocol == UAC_VERSION_1) { 1397 csize = hdr->bControlSize; 1398 if (!csize) { 1399 usb_audio_dbg(state->chip, 1400 "unit %u: invalid bControlSize == 0\n", 1401 unitid); 1402 return -EINVAL; 1403 } 1404 channels = (hdr->bLength - 7) / csize - 1; 1405 bmaControls = hdr->bmaControls; 1406 if (hdr->bLength < 7 + csize) { 1407 usb_audio_err(state->chip, 1408 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", 1409 unitid); 1410 return -EINVAL; 1411 } 1412 } else { 1413 struct uac2_feature_unit_descriptor *ftr = _ftr; 1414 csize = 4; 1415 channels = (hdr->bLength - 6) / 4 - 1; 1416 bmaControls = ftr->bmaControls; 1417 if (hdr->bLength < 6 + csize) { 1418 usb_audio_err(state->chip, 1419 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", 1420 unitid); 1421 return -EINVAL; 1422 } 1423 } 1424 1425 /* parse the source unit */ 1426 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0) 1427 return err; 1428 1429 /* determine the input source type and name */ 1430 err = check_input_term(state, hdr->bSourceID, &iterm); 1431 if (err < 0) 1432 return err; 1433 1434 master_bits = snd_usb_combine_bytes(bmaControls, csize); 1435 /* master configuration quirks */ 1436 switch (state->chip->usb_id) { 1437 case USB_ID(0x08bb, 0x2702): 1438 usb_audio_info(state->chip, 1439 "usbmixer: master volume quirk for PCM2702 chip\n"); 1440 /* disable non-functional volume control */ 1441 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME); 1442 break; 1443 case USB_ID(0x1130, 0xf211): 1444 usb_audio_info(state->chip, 1445 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n"); 1446 /* disable non-functional volume control */ 1447 channels = 0; 1448 break; 1449 1450 } 1451 if (channels > 0) 1452 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize); 1453 else 1454 first_ch_bits = 0; 1455 1456 if (state->mixer->protocol == UAC_VERSION_1) { 1457 /* check all control types */ 1458 for (i = 0; i < 10; i++) { 1459 unsigned int ch_bits = 0; 1460 for (j = 0; j < channels; j++) { 1461 unsigned int mask; 1462 1463 mask = snd_usb_combine_bytes(bmaControls + 1464 csize * (j+1), csize); 1465 if (mask & (1 << i)) 1466 ch_bits |= (1 << j); 1467 } 1468 /* audio class v1 controls are never read-only */ 1469 1470 /* 1471 * The first channel must be set 1472 * (for ease of programming). 1473 */ 1474 if (ch_bits & 1) 1475 build_feature_ctl(state, _ftr, ch_bits, i, 1476 &iterm, unitid, 0); 1477 if (master_bits & (1 << i)) 1478 build_feature_ctl(state, _ftr, 0, i, &iterm, 1479 unitid, 0); 1480 } 1481 } else { /* UAC_VERSION_2 */ 1482 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) { 1483 unsigned int ch_bits = 0; 1484 unsigned int ch_read_only = 0; 1485 1486 for (j = 0; j < channels; j++) { 1487 unsigned int mask; 1488 1489 mask = snd_usb_combine_bytes(bmaControls + 1490 csize * (j+1), csize); 1491 if (uac2_control_is_readable(mask, i)) { 1492 ch_bits |= (1 << j); 1493 if (!uac2_control_is_writeable(mask, i)) 1494 ch_read_only |= (1 << j); 1495 } 1496 } 1497 1498 /* 1499 * NOTE: build_feature_ctl() will mark the control 1500 * read-only if all channels are marked read-only in 1501 * the descriptors. Otherwise, the control will be 1502 * reported as writeable, but the driver will not 1503 * actually issue a write command for read-only 1504 * channels. 1505 */ 1506 1507 /* 1508 * The first channel must be set 1509 * (for ease of programming). 1510 */ 1511 if (ch_bits & 1) 1512 build_feature_ctl(state, _ftr, ch_bits, i, 1513 &iterm, unitid, ch_read_only); 1514 if (uac2_control_is_readable(master_bits, i)) 1515 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 1516 !uac2_control_is_writeable(master_bits, i)); 1517 } 1518 } 1519 1520 return 0; 1521 } 1522 1523 /* 1524 * Mixer Unit 1525 */ 1526 1527 /* 1528 * build a mixer unit control 1529 * 1530 * the callbacks are identical with feature unit. 1531 * input channel number (zero based) is given in control field instead. 1532 */ 1533 static void build_mixer_unit_ctl(struct mixer_build *state, 1534 struct uac_mixer_unit_descriptor *desc, 1535 int in_pin, int in_ch, int unitid, 1536 struct usb_audio_term *iterm) 1537 { 1538 struct usb_mixer_elem_info *cval; 1539 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc); 1540 unsigned int i, len; 1541 struct snd_kcontrol *kctl; 1542 const struct usbmix_name_map *map; 1543 1544 map = find_map(state, unitid, 0); 1545 if (check_ignored_ctl(map)) 1546 return; 1547 1548 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1549 if (!cval) 1550 return; 1551 1552 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1553 cval->control = in_ch + 1; /* based on 1 */ 1554 cval->val_type = USB_MIXER_S16; 1555 for (i = 0; i < num_outs; i++) { 1556 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); 1557 1558 if (check_matrix_bitmap(c, in_ch, i, num_outs)) { 1559 cval->cmask |= (1 << i); 1560 cval->channels++; 1561 } 1562 } 1563 1564 /* get min/max values */ 1565 get_min_max(cval, 0); 1566 1567 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1568 if (!kctl) { 1569 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 1570 kfree(cval); 1571 return; 1572 } 1573 kctl->private_free = snd_usb_mixer_elem_free; 1574 1575 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1576 if (!len) 1577 len = get_term_name(state, iterm, kctl->id.name, 1578 sizeof(kctl->id.name), 0); 1579 if (!len) 1580 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1); 1581 append_ctl_name(kctl, " Volume"); 1582 1583 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n", 1584 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max); 1585 snd_usb_mixer_add_control(&cval->head, kctl); 1586 } 1587 1588 /* 1589 * parse a mixer unit 1590 */ 1591 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, 1592 void *raw_desc) 1593 { 1594 struct uac_mixer_unit_descriptor *desc = raw_desc; 1595 struct usb_audio_term iterm; 1596 int input_pins, num_ins, num_outs; 1597 int pin, ich, err; 1598 1599 if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) || 1600 !(num_outs = uac_mixer_unit_bNrChannels(desc))) { 1601 usb_audio_err(state->chip, 1602 "invalid MIXER UNIT descriptor %d\n", 1603 unitid); 1604 return -EINVAL; 1605 } 1606 1607 num_ins = 0; 1608 ich = 0; 1609 for (pin = 0; pin < input_pins; pin++) { 1610 err = parse_audio_unit(state, desc->baSourceID[pin]); 1611 if (err < 0) 1612 continue; 1613 /* no bmControls field (e.g. Maya44) -> ignore */ 1614 if (desc->bLength <= 10 + input_pins) 1615 continue; 1616 err = check_input_term(state, desc->baSourceID[pin], &iterm); 1617 if (err < 0) 1618 return err; 1619 num_ins += iterm.channels; 1620 for (; ich < num_ins; ich++) { 1621 int och, ich_has_controls = 0; 1622 1623 for (och = 0; och < num_outs; och++) { 1624 __u8 *c = uac_mixer_unit_bmControls(desc, 1625 state->mixer->protocol); 1626 1627 if (check_matrix_bitmap(c, ich, och, num_outs)) { 1628 ich_has_controls = 1; 1629 break; 1630 } 1631 } 1632 if (ich_has_controls) 1633 build_mixer_unit_ctl(state, desc, pin, ich, 1634 unitid, &iterm); 1635 } 1636 } 1637 return 0; 1638 } 1639 1640 /* 1641 * Processing Unit / Extension Unit 1642 */ 1643 1644 /* get callback for processing/extension unit */ 1645 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, 1646 struct snd_ctl_elem_value *ucontrol) 1647 { 1648 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1649 int err, val; 1650 1651 err = get_cur_ctl_value(cval, cval->control << 8, &val); 1652 if (err < 0) { 1653 ucontrol->value.integer.value[0] = cval->min; 1654 return filter_error(cval, err); 1655 } 1656 val = get_relative_value(cval, val); 1657 ucontrol->value.integer.value[0] = val; 1658 return 0; 1659 } 1660 1661 /* put callback for processing/extension unit */ 1662 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, 1663 struct snd_ctl_elem_value *ucontrol) 1664 { 1665 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1666 int val, oval, err; 1667 1668 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 1669 if (err < 0) 1670 return filter_error(cval, err); 1671 val = ucontrol->value.integer.value[0]; 1672 val = get_abs_value(cval, val); 1673 if (val != oval) { 1674 set_cur_ctl_value(cval, cval->control << 8, val); 1675 return 1; 1676 } 1677 return 0; 1678 } 1679 1680 /* alsa control interface for processing/extension unit */ 1681 static struct snd_kcontrol_new mixer_procunit_ctl = { 1682 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1683 .name = "", /* will be filled later */ 1684 .info = mixer_ctl_feature_info, 1685 .get = mixer_ctl_procunit_get, 1686 .put = mixer_ctl_procunit_put, 1687 }; 1688 1689 /* 1690 * predefined data for processing units 1691 */ 1692 struct procunit_value_info { 1693 int control; 1694 char *suffix; 1695 int val_type; 1696 int min_value; 1697 }; 1698 1699 struct procunit_info { 1700 int type; 1701 char *name; 1702 struct procunit_value_info *values; 1703 }; 1704 1705 static struct procunit_value_info updown_proc_info[] = { 1706 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1707 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 1708 { 0 } 1709 }; 1710 static struct procunit_value_info prologic_proc_info[] = { 1711 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1712 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 1713 { 0 } 1714 }; 1715 static struct procunit_value_info threed_enh_proc_info[] = { 1716 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1717 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 }, 1718 { 0 } 1719 }; 1720 static struct procunit_value_info reverb_proc_info[] = { 1721 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1722 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, 1723 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 }, 1724 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 }, 1725 { 0 } 1726 }; 1727 static struct procunit_value_info chorus_proc_info[] = { 1728 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1729 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, 1730 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, 1731 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, 1732 { 0 } 1733 }; 1734 static struct procunit_value_info dcr_proc_info[] = { 1735 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1736 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 }, 1737 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 }, 1738 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, 1739 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 }, 1740 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 }, 1741 { 0 } 1742 }; 1743 1744 static struct procunit_info procunits[] = { 1745 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info }, 1746 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info }, 1747 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info }, 1748 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info }, 1749 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info }, 1750 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info }, 1751 { 0 }, 1752 }; 1753 /* 1754 * predefined data for extension units 1755 */ 1756 static struct procunit_value_info clock_rate_xu_info[] = { 1757 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, 1758 { 0 } 1759 }; 1760 static struct procunit_value_info clock_source_xu_info[] = { 1761 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, 1762 { 0 } 1763 }; 1764 static struct procunit_value_info spdif_format_xu_info[] = { 1765 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, 1766 { 0 } 1767 }; 1768 static struct procunit_value_info soft_limit_xu_info[] = { 1769 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, 1770 { 0 } 1771 }; 1772 static struct procunit_info extunits[] = { 1773 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info }, 1774 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info }, 1775 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info }, 1776 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info }, 1777 { 0 } 1778 }; 1779 1780 /* 1781 * build a processing/extension unit 1782 */ 1783 static int build_audio_procunit(struct mixer_build *state, int unitid, 1784 void *raw_desc, struct procunit_info *list, 1785 char *name) 1786 { 1787 struct uac_processing_unit_descriptor *desc = raw_desc; 1788 int num_ins = desc->bNrInPins; 1789 struct usb_mixer_elem_info *cval; 1790 struct snd_kcontrol *kctl; 1791 int i, err, nameid, type, len; 1792 struct procunit_info *info; 1793 struct procunit_value_info *valinfo; 1794 const struct usbmix_name_map *map; 1795 static struct procunit_value_info default_value_info[] = { 1796 { 0x01, "Switch", USB_MIXER_BOOLEAN }, 1797 { 0 } 1798 }; 1799 static struct procunit_info default_info = { 1800 0, NULL, default_value_info 1801 }; 1802 1803 if (desc->bLength < 13 || desc->bLength < 13 + num_ins || 1804 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { 1805 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); 1806 return -EINVAL; 1807 } 1808 1809 for (i = 0; i < num_ins; i++) { 1810 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 1811 return err; 1812 } 1813 1814 type = le16_to_cpu(desc->wProcessType); 1815 for (info = list; info && info->type; info++) 1816 if (info->type == type) 1817 break; 1818 if (!info || !info->type) 1819 info = &default_info; 1820 1821 for (valinfo = info->values; valinfo->control; valinfo++) { 1822 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol); 1823 1824 if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1)))) 1825 continue; 1826 map = find_map(state, unitid, valinfo->control); 1827 if (check_ignored_ctl(map)) 1828 continue; 1829 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1830 if (!cval) 1831 return -ENOMEM; 1832 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1833 cval->control = valinfo->control; 1834 cval->val_type = valinfo->val_type; 1835 cval->channels = 1; 1836 1837 /* get min/max values */ 1838 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) { 1839 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol); 1840 /* FIXME: hard-coded */ 1841 cval->min = 1; 1842 cval->max = control_spec[0]; 1843 cval->res = 1; 1844 cval->initialized = 1; 1845 } else { 1846 if (type == USB_XU_CLOCK_RATE) { 1847 /* 1848 * E-Mu USB 0404/0202/TrackerPre/0204 1849 * samplerate control quirk 1850 */ 1851 cval->min = 0; 1852 cval->max = 5; 1853 cval->res = 1; 1854 cval->initialized = 1; 1855 } else 1856 get_min_max(cval, valinfo->min_value); 1857 } 1858 1859 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); 1860 if (!kctl) { 1861 kfree(cval); 1862 return -ENOMEM; 1863 } 1864 kctl->private_free = snd_usb_mixer_elem_free; 1865 1866 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) { 1867 /* nothing */ ; 1868 } else if (info->name) { 1869 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name)); 1870 } else { 1871 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); 1872 len = 0; 1873 if (nameid) 1874 len = snd_usb_copy_string_desc(state, nameid, 1875 kctl->id.name, 1876 sizeof(kctl->id.name)); 1877 if (!len) 1878 strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); 1879 } 1880 append_ctl_name(kctl, " "); 1881 append_ctl_name(kctl, valinfo->suffix); 1882 1883 usb_audio_dbg(state->chip, 1884 "[%d] PU [%s] ch = %d, val = %d/%d\n", 1885 cval->head.id, kctl->id.name, cval->channels, 1886 cval->min, cval->max); 1887 1888 err = snd_usb_mixer_add_control(&cval->head, kctl); 1889 if (err < 0) 1890 return err; 1891 } 1892 return 0; 1893 } 1894 1895 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, 1896 void *raw_desc) 1897 { 1898 return build_audio_procunit(state, unitid, raw_desc, 1899 procunits, "Processing Unit"); 1900 } 1901 1902 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, 1903 void *raw_desc) 1904 { 1905 /* 1906 * Note that we parse extension units with processing unit descriptors. 1907 * That's ok as the layout is the same. 1908 */ 1909 return build_audio_procunit(state, unitid, raw_desc, 1910 extunits, "Extension Unit"); 1911 } 1912 1913 /* 1914 * Selector Unit 1915 */ 1916 1917 /* 1918 * info callback for selector unit 1919 * use an enumerator type for routing 1920 */ 1921 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, 1922 struct snd_ctl_elem_info *uinfo) 1923 { 1924 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1925 const char **itemlist = (const char **)kcontrol->private_value; 1926 1927 if (snd_BUG_ON(!itemlist)) 1928 return -EINVAL; 1929 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist); 1930 } 1931 1932 /* get callback for selector unit */ 1933 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, 1934 struct snd_ctl_elem_value *ucontrol) 1935 { 1936 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1937 int val, err; 1938 1939 err = get_cur_ctl_value(cval, cval->control << 8, &val); 1940 if (err < 0) { 1941 ucontrol->value.enumerated.item[0] = 0; 1942 return filter_error(cval, err); 1943 } 1944 val = get_relative_value(cval, val); 1945 ucontrol->value.enumerated.item[0] = val; 1946 return 0; 1947 } 1948 1949 /* put callback for selector unit */ 1950 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, 1951 struct snd_ctl_elem_value *ucontrol) 1952 { 1953 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1954 int val, oval, err; 1955 1956 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 1957 if (err < 0) 1958 return filter_error(cval, err); 1959 val = ucontrol->value.enumerated.item[0]; 1960 val = get_abs_value(cval, val); 1961 if (val != oval) { 1962 set_cur_ctl_value(cval, cval->control << 8, val); 1963 return 1; 1964 } 1965 return 0; 1966 } 1967 1968 /* alsa control interface for selector unit */ 1969 static struct snd_kcontrol_new mixer_selectunit_ctl = { 1970 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1971 .name = "", /* will be filled later */ 1972 .info = mixer_ctl_selector_info, 1973 .get = mixer_ctl_selector_get, 1974 .put = mixer_ctl_selector_put, 1975 }; 1976 1977 /* 1978 * private free callback. 1979 * free both private_data and private_value 1980 */ 1981 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) 1982 { 1983 int i, num_ins = 0; 1984 1985 if (kctl->private_data) { 1986 struct usb_mixer_elem_info *cval = kctl->private_data; 1987 num_ins = cval->max; 1988 kfree(cval); 1989 kctl->private_data = NULL; 1990 } 1991 if (kctl->private_value) { 1992 char **itemlist = (char **)kctl->private_value; 1993 for (i = 0; i < num_ins; i++) 1994 kfree(itemlist[i]); 1995 kfree(itemlist); 1996 kctl->private_value = 0; 1997 } 1998 } 1999 2000 /* 2001 * parse a selector unit 2002 */ 2003 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, 2004 void *raw_desc) 2005 { 2006 struct uac_selector_unit_descriptor *desc = raw_desc; 2007 unsigned int i, nameid, len; 2008 int err; 2009 struct usb_mixer_elem_info *cval; 2010 struct snd_kcontrol *kctl; 2011 const struct usbmix_name_map *map; 2012 char **namelist; 2013 2014 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) { 2015 usb_audio_err(state->chip, 2016 "invalid SELECTOR UNIT descriptor %d\n", unitid); 2017 return -EINVAL; 2018 } 2019 2020 for (i = 0; i < desc->bNrInPins; i++) { 2021 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 2022 return err; 2023 } 2024 2025 if (desc->bNrInPins == 1) /* only one ? nonsense! */ 2026 return 0; 2027 2028 map = find_map(state, unitid, 0); 2029 if (check_ignored_ctl(map)) 2030 return 0; 2031 2032 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 2033 if (!cval) 2034 return -ENOMEM; 2035 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 2036 cval->val_type = USB_MIXER_U8; 2037 cval->channels = 1; 2038 cval->min = 1; 2039 cval->max = desc->bNrInPins; 2040 cval->res = 1; 2041 cval->initialized = 1; 2042 2043 if (state->mixer->protocol == UAC_VERSION_1) 2044 cval->control = 0; 2045 else /* UAC_VERSION_2 */ 2046 cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ? 2047 UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR; 2048 2049 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL); 2050 if (!namelist) { 2051 kfree(cval); 2052 return -ENOMEM; 2053 } 2054 #define MAX_ITEM_NAME_LEN 64 2055 for (i = 0; i < desc->bNrInPins; i++) { 2056 struct usb_audio_term iterm; 2057 len = 0; 2058 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); 2059 if (!namelist[i]) { 2060 while (i--) 2061 kfree(namelist[i]); 2062 kfree(namelist); 2063 kfree(cval); 2064 return -ENOMEM; 2065 } 2066 len = check_mapped_selector_name(state, unitid, i, namelist[i], 2067 MAX_ITEM_NAME_LEN); 2068 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0) 2069 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0); 2070 if (! len) 2071 sprintf(namelist[i], "Input %u", i); 2072 } 2073 2074 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); 2075 if (! kctl) { 2076 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 2077 kfree(namelist); 2078 kfree(cval); 2079 return -ENOMEM; 2080 } 2081 kctl->private_value = (unsigned long)namelist; 2082 kctl->private_free = usb_mixer_selector_elem_free; 2083 2084 nameid = uac_selector_unit_iSelector(desc); 2085 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 2086 if (len) 2087 ; 2088 else if (nameid) 2089 snd_usb_copy_string_desc(state, nameid, kctl->id.name, 2090 sizeof(kctl->id.name)); 2091 else { 2092 len = get_term_name(state, &state->oterm, 2093 kctl->id.name, sizeof(kctl->id.name), 0); 2094 if (!len) 2095 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name)); 2096 2097 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) 2098 append_ctl_name(kctl, " Clock Source"); 2099 else if ((state->oterm.type & 0xff00) == 0x0100) 2100 append_ctl_name(kctl, " Capture Source"); 2101 else 2102 append_ctl_name(kctl, " Playback Source"); 2103 } 2104 2105 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n", 2106 cval->head.id, kctl->id.name, desc->bNrInPins); 2107 return snd_usb_mixer_add_control(&cval->head, kctl); 2108 } 2109 2110 /* 2111 * parse an audio unit recursively 2112 */ 2113 2114 static int parse_audio_unit(struct mixer_build *state, int unitid) 2115 { 2116 unsigned char *p1; 2117 2118 if (test_and_set_bit(unitid, state->unitbitmap)) 2119 return 0; /* the unit already visited */ 2120 2121 p1 = find_audio_control_unit(state, unitid); 2122 if (!p1) { 2123 usb_audio_err(state->chip, "unit %d not found!\n", unitid); 2124 return -EINVAL; 2125 } 2126 2127 switch (p1[2]) { 2128 case UAC_INPUT_TERMINAL: 2129 case UAC2_CLOCK_SOURCE: 2130 return 0; /* NOP */ 2131 case UAC_MIXER_UNIT: 2132 return parse_audio_mixer_unit(state, unitid, p1); 2133 case UAC_SELECTOR_UNIT: 2134 case UAC2_CLOCK_SELECTOR: 2135 return parse_audio_selector_unit(state, unitid, p1); 2136 case UAC_FEATURE_UNIT: 2137 return parse_audio_feature_unit(state, unitid, p1); 2138 case UAC1_PROCESSING_UNIT: 2139 /* UAC2_EFFECT_UNIT has the same value */ 2140 if (state->mixer->protocol == UAC_VERSION_1) 2141 return parse_audio_processing_unit(state, unitid, p1); 2142 else 2143 return 0; /* FIXME - effect units not implemented yet */ 2144 case UAC1_EXTENSION_UNIT: 2145 /* UAC2_PROCESSING_UNIT_V2 has the same value */ 2146 if (state->mixer->protocol == UAC_VERSION_1) 2147 return parse_audio_extension_unit(state, unitid, p1); 2148 else /* UAC_VERSION_2 */ 2149 return parse_audio_processing_unit(state, unitid, p1); 2150 case UAC2_EXTENSION_UNIT_V2: 2151 return parse_audio_extension_unit(state, unitid, p1); 2152 default: 2153 usb_audio_err(state->chip, 2154 "unit %u: unexpected type 0x%02x\n", unitid, p1[2]); 2155 return -EINVAL; 2156 } 2157 } 2158 2159 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer) 2160 { 2161 kfree(mixer->id_elems); 2162 if (mixer->urb) { 2163 kfree(mixer->urb->transfer_buffer); 2164 usb_free_urb(mixer->urb); 2165 } 2166 usb_free_urb(mixer->rc_urb); 2167 kfree(mixer->rc_setup_packet); 2168 kfree(mixer); 2169 } 2170 2171 static int snd_usb_mixer_dev_free(struct snd_device *device) 2172 { 2173 struct usb_mixer_interface *mixer = device->device_data; 2174 snd_usb_mixer_free(mixer); 2175 return 0; 2176 } 2177 2178 /* 2179 * create mixer controls 2180 * 2181 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers 2182 */ 2183 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) 2184 { 2185 struct mixer_build state; 2186 int err; 2187 const struct usbmix_ctl_map *map; 2188 void *p; 2189 2190 memset(&state, 0, sizeof(state)); 2191 state.chip = mixer->chip; 2192 state.mixer = mixer; 2193 state.buffer = mixer->hostif->extra; 2194 state.buflen = mixer->hostif->extralen; 2195 2196 /* check the mapping table */ 2197 for (map = usbmix_ctl_maps; map->id; map++) { 2198 if (map->id == state.chip->usb_id) { 2199 state.map = map->map; 2200 state.selector_map = map->selector_map; 2201 mixer->ignore_ctl_error = map->ignore_ctl_error; 2202 break; 2203 } 2204 } 2205 2206 p = NULL; 2207 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, 2208 mixer->hostif->extralen, 2209 p, UAC_OUTPUT_TERMINAL)) != NULL) { 2210 if (mixer->protocol == UAC_VERSION_1) { 2211 struct uac1_output_terminal_descriptor *desc = p; 2212 2213 if (desc->bLength < sizeof(*desc)) 2214 continue; /* invalid descriptor? */ 2215 /* mark terminal ID as visited */ 2216 set_bit(desc->bTerminalID, state.unitbitmap); 2217 state.oterm.id = desc->bTerminalID; 2218 state.oterm.type = le16_to_cpu(desc->wTerminalType); 2219 state.oterm.name = desc->iTerminal; 2220 err = parse_audio_unit(&state, desc->bSourceID); 2221 if (err < 0 && err != -EINVAL) 2222 return err; 2223 } else { /* UAC_VERSION_2 */ 2224 struct uac2_output_terminal_descriptor *desc = p; 2225 2226 if (desc->bLength < sizeof(*desc)) 2227 continue; /* invalid descriptor? */ 2228 /* mark terminal ID as visited */ 2229 set_bit(desc->bTerminalID, state.unitbitmap); 2230 state.oterm.id = desc->bTerminalID; 2231 state.oterm.type = le16_to_cpu(desc->wTerminalType); 2232 state.oterm.name = desc->iTerminal; 2233 err = parse_audio_unit(&state, desc->bSourceID); 2234 if (err < 0 && err != -EINVAL) 2235 return err; 2236 2237 /* 2238 * For UAC2, use the same approach to also add the 2239 * clock selectors 2240 */ 2241 err = parse_audio_unit(&state, desc->bCSourceID); 2242 if (err < 0 && err != -EINVAL) 2243 return err; 2244 } 2245 } 2246 2247 return 0; 2248 } 2249 2250 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) 2251 { 2252 struct usb_mixer_elem_list *list; 2253 2254 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) 2255 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 2256 &list->kctl->id); 2257 } 2258 2259 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer, 2260 struct usb_mixer_elem_list *list) 2261 { 2262 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list; 2263 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN", 2264 "S8", "U8", "S16", "U16"}; 2265 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, " 2266 "channels=%i, type=\"%s\"\n", cval->head.id, 2267 cval->control, cval->cmask, cval->channels, 2268 val_types[cval->val_type]); 2269 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n", 2270 cval->min, cval->max, cval->dBmin, cval->dBmax); 2271 } 2272 2273 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, 2274 struct snd_info_buffer *buffer) 2275 { 2276 struct snd_usb_audio *chip = entry->private_data; 2277 struct usb_mixer_interface *mixer; 2278 struct usb_mixer_elem_list *list; 2279 int unitid; 2280 2281 list_for_each_entry(mixer, &chip->mixer_list, list) { 2282 snd_iprintf(buffer, 2283 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n", 2284 chip->usb_id, snd_usb_ctrl_intf(chip), 2285 mixer->ignore_ctl_error); 2286 snd_iprintf(buffer, "Card: %s\n", chip->card->longname); 2287 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { 2288 for (list = mixer->id_elems[unitid]; list; 2289 list = list->next_id_elem) { 2290 snd_iprintf(buffer, " Unit: %i\n", list->id); 2291 if (list->kctl) 2292 snd_iprintf(buffer, 2293 " Control: name=\"%s\", index=%i\n", 2294 list->kctl->id.name, 2295 list->kctl->id.index); 2296 if (list->dump) 2297 list->dump(buffer, list); 2298 } 2299 } 2300 } 2301 } 2302 2303 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer, 2304 int attribute, int value, int index) 2305 { 2306 struct usb_mixer_elem_list *list; 2307 __u8 unitid = (index >> 8) & 0xff; 2308 __u8 control = (value >> 8) & 0xff; 2309 __u8 channel = value & 0xff; 2310 2311 if (channel >= MAX_CHANNELS) { 2312 usb_audio_dbg(mixer->chip, 2313 "%s(): bogus channel number %d\n", 2314 __func__, channel); 2315 return; 2316 } 2317 2318 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) { 2319 struct usb_mixer_elem_info *info; 2320 2321 if (!list->kctl) 2322 continue; 2323 2324 info = (struct usb_mixer_elem_info *)list; 2325 if (info->control != control) 2326 continue; 2327 2328 switch (attribute) { 2329 case UAC2_CS_CUR: 2330 /* invalidate cache, so the value is read from the device */ 2331 if (channel) 2332 info->cached &= ~(1 << channel); 2333 else /* master channel */ 2334 info->cached = 0; 2335 2336 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 2337 &info->head.kctl->id); 2338 break; 2339 2340 case UAC2_CS_RANGE: 2341 /* TODO */ 2342 break; 2343 2344 case UAC2_CS_MEM: 2345 /* TODO */ 2346 break; 2347 2348 default: 2349 usb_audio_dbg(mixer->chip, 2350 "unknown attribute %d in interrupt\n", 2351 attribute); 2352 break; 2353 } /* switch */ 2354 } 2355 } 2356 2357 static void snd_usb_mixer_interrupt(struct urb *urb) 2358 { 2359 struct usb_mixer_interface *mixer = urb->context; 2360 int len = urb->actual_length; 2361 int ustatus = urb->status; 2362 2363 if (ustatus != 0) 2364 goto requeue; 2365 2366 if (mixer->protocol == UAC_VERSION_1) { 2367 struct uac1_status_word *status; 2368 2369 for (status = urb->transfer_buffer; 2370 len >= sizeof(*status); 2371 len -= sizeof(*status), status++) { 2372 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n", 2373 status->bStatusType, 2374 status->bOriginator); 2375 2376 /* ignore any notifications not from the control interface */ 2377 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) != 2378 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF) 2379 continue; 2380 2381 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED) 2382 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator); 2383 else 2384 snd_usb_mixer_notify_id(mixer, status->bOriginator); 2385 } 2386 } else { /* UAC_VERSION_2 */ 2387 struct uac2_interrupt_data_msg *msg; 2388 2389 for (msg = urb->transfer_buffer; 2390 len >= sizeof(*msg); 2391 len -= sizeof(*msg), msg++) { 2392 /* drop vendor specific and endpoint requests */ 2393 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) || 2394 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP)) 2395 continue; 2396 2397 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute, 2398 le16_to_cpu(msg->wValue), 2399 le16_to_cpu(msg->wIndex)); 2400 } 2401 } 2402 2403 requeue: 2404 if (ustatus != -ENOENT && 2405 ustatus != -ECONNRESET && 2406 ustatus != -ESHUTDOWN) { 2407 urb->dev = mixer->chip->dev; 2408 usb_submit_urb(urb, GFP_ATOMIC); 2409 } 2410 } 2411 2412 /* create the handler for the optional status interrupt endpoint */ 2413 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer) 2414 { 2415 struct usb_endpoint_descriptor *ep; 2416 void *transfer_buffer; 2417 int buffer_length; 2418 unsigned int epnum; 2419 2420 /* we need one interrupt input endpoint */ 2421 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1) 2422 return 0; 2423 ep = get_endpoint(mixer->hostif, 0); 2424 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep)) 2425 return 0; 2426 2427 epnum = usb_endpoint_num(ep); 2428 buffer_length = le16_to_cpu(ep->wMaxPacketSize); 2429 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL); 2430 if (!transfer_buffer) 2431 return -ENOMEM; 2432 mixer->urb = usb_alloc_urb(0, GFP_KERNEL); 2433 if (!mixer->urb) { 2434 kfree(transfer_buffer); 2435 return -ENOMEM; 2436 } 2437 usb_fill_int_urb(mixer->urb, mixer->chip->dev, 2438 usb_rcvintpipe(mixer->chip->dev, epnum), 2439 transfer_buffer, buffer_length, 2440 snd_usb_mixer_interrupt, mixer, ep->bInterval); 2441 usb_submit_urb(mixer->urb, GFP_KERNEL); 2442 return 0; 2443 } 2444 2445 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, 2446 int ignore_error) 2447 { 2448 static struct snd_device_ops dev_ops = { 2449 .dev_free = snd_usb_mixer_dev_free 2450 }; 2451 struct usb_mixer_interface *mixer; 2452 struct snd_info_entry *entry; 2453 int err; 2454 2455 strcpy(chip->card->mixername, "USB Mixer"); 2456 2457 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL); 2458 if (!mixer) 2459 return -ENOMEM; 2460 mixer->chip = chip; 2461 mixer->ignore_ctl_error = ignore_error; 2462 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems), 2463 GFP_KERNEL); 2464 if (!mixer->id_elems) { 2465 kfree(mixer); 2466 return -ENOMEM; 2467 } 2468 2469 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0]; 2470 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) { 2471 case UAC_VERSION_1: 2472 default: 2473 mixer->protocol = UAC_VERSION_1; 2474 break; 2475 case UAC_VERSION_2: 2476 mixer->protocol = UAC_VERSION_2; 2477 break; 2478 } 2479 2480 if ((err = snd_usb_mixer_controls(mixer)) < 0 || 2481 (err = snd_usb_mixer_status_create(mixer)) < 0) 2482 goto _error; 2483 2484 snd_usb_mixer_apply_create_quirk(mixer); 2485 2486 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops); 2487 if (err < 0) 2488 goto _error; 2489 2490 if (list_empty(&chip->mixer_list) && 2491 !snd_card_proc_new(chip->card, "usbmixer", &entry)) 2492 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read); 2493 2494 list_add(&mixer->list, &chip->mixer_list); 2495 return 0; 2496 2497 _error: 2498 snd_usb_mixer_free(mixer); 2499 return err; 2500 } 2501 2502 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer) 2503 { 2504 usb_kill_urb(mixer->urb); 2505 usb_kill_urb(mixer->rc_urb); 2506 } 2507 2508 #ifdef CONFIG_PM 2509 /* stop any bus activity of a mixer */ 2510 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer) 2511 { 2512 usb_kill_urb(mixer->urb); 2513 usb_kill_urb(mixer->rc_urb); 2514 } 2515 2516 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer) 2517 { 2518 int err; 2519 2520 if (mixer->urb) { 2521 err = usb_submit_urb(mixer->urb, GFP_NOIO); 2522 if (err < 0) 2523 return err; 2524 } 2525 2526 return 0; 2527 } 2528 2529 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer) 2530 { 2531 snd_usb_mixer_inactivate(mixer); 2532 return 0; 2533 } 2534 2535 static int restore_mixer_value(struct usb_mixer_elem_list *list) 2536 { 2537 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list; 2538 int c, err, idx; 2539 2540 if (cval->cmask) { 2541 idx = 0; 2542 for (c = 0; c < MAX_CHANNELS; c++) { 2543 if (!(cval->cmask & (1 << c))) 2544 continue; 2545 if (cval->cached & (1 << (c + 1))) { 2546 err = snd_usb_set_cur_mix_value(cval, c + 1, idx, 2547 cval->cache_val[idx]); 2548 if (err < 0) 2549 return err; 2550 } 2551 idx++; 2552 } 2553 } else { 2554 /* master */ 2555 if (cval->cached) { 2556 err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val); 2557 if (err < 0) 2558 return err; 2559 } 2560 } 2561 2562 return 0; 2563 } 2564 2565 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume) 2566 { 2567 struct usb_mixer_elem_list *list; 2568 int id, err; 2569 2570 if (reset_resume) { 2571 /* restore cached mixer values */ 2572 for (id = 0; id < MAX_ID_ELEMS; id++) { 2573 for (list = mixer->id_elems[id]; list; 2574 list = list->next_id_elem) { 2575 if (list->resume) { 2576 err = list->resume(list); 2577 if (err < 0) 2578 return err; 2579 } 2580 } 2581 } 2582 } 2583 2584 return snd_usb_mixer_activate(mixer); 2585 } 2586 #endif 2587 2588 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, 2589 struct usb_mixer_interface *mixer, 2590 int unitid) 2591 { 2592 list->mixer = mixer; 2593 list->id = unitid; 2594 list->dump = snd_usb_mixer_dump_cval; 2595 #ifdef CONFIG_PM 2596 list->resume = restore_mixer_value; 2597 #endif 2598 } 2599