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/log2.h> 49 #include <linux/slab.h> 50 #include <linux/string.h> 51 #include <linux/usb.h> 52 #include <linux/usb/audio.h> 53 #include <linux/usb/audio-v2.h> 54 55 #include <sound/core.h> 56 #include <sound/control.h> 57 #include <sound/hwdep.h> 58 #include <sound/info.h> 59 #include <sound/tlv.h> 60 61 #include "usbaudio.h" 62 #include "mixer.h" 63 #include "helper.h" 64 #include "mixer_quirks.h" 65 #include "power.h" 66 67 #define MAX_ID_ELEMS 256 68 69 struct usb_audio_term { 70 int id; 71 int type; 72 int channels; 73 unsigned int chconfig; 74 int name; 75 }; 76 77 struct usbmix_name_map; 78 79 struct mixer_build { 80 struct snd_usb_audio *chip; 81 struct usb_mixer_interface *mixer; 82 unsigned char *buffer; 83 unsigned int buflen; 84 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS); 85 struct usb_audio_term oterm; 86 const struct usbmix_name_map *map; 87 const struct usbmix_selector_map *selector_map; 88 }; 89 90 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/ 91 enum { 92 USB_XU_CLOCK_RATE = 0xe301, 93 USB_XU_CLOCK_SOURCE = 0xe302, 94 USB_XU_DIGITAL_IO_STATUS = 0xe303, 95 USB_XU_DEVICE_OPTIONS = 0xe304, 96 USB_XU_DIRECT_MONITORING = 0xe305, 97 USB_XU_METERING = 0xe306 98 }; 99 enum { 100 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/ 101 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */ 102 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */ 103 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */ 104 }; 105 106 /* 107 * manual mapping of mixer names 108 * if the mixer topology is too complicated and the parsed names are 109 * ambiguous, add the entries in usbmixer_maps.c. 110 */ 111 #include "mixer_maps.c" 112 113 static const struct usbmix_name_map * 114 find_map(struct mixer_build *state, int unitid, int control) 115 { 116 const struct usbmix_name_map *p = state->map; 117 118 if (!p) 119 return NULL; 120 121 for (p = state->map; p->id; p++) { 122 if (p->id == unitid && 123 (!control || !p->control || control == p->control)) 124 return p; 125 } 126 return NULL; 127 } 128 129 /* get the mapped name if the unit matches */ 130 static int 131 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen) 132 { 133 if (!p || !p->name) 134 return 0; 135 136 buflen--; 137 return strlcpy(buf, p->name, buflen); 138 } 139 140 /* ignore the error value if ignore_ctl_error flag is set */ 141 #define filter_error(cval, err) \ 142 ((cval)->head.mixer->ignore_ctl_error ? 0 : (err)) 143 144 /* check whether the control should be ignored */ 145 static inline int 146 check_ignored_ctl(const struct usbmix_name_map *p) 147 { 148 if (!p || p->name || p->dB) 149 return 0; 150 return 1; 151 } 152 153 /* dB mapping */ 154 static inline void check_mapped_dB(const struct usbmix_name_map *p, 155 struct usb_mixer_elem_info *cval) 156 { 157 if (p && p->dB) { 158 cval->dBmin = p->dB->min; 159 cval->dBmax = p->dB->max; 160 cval->initialized = 1; 161 } 162 } 163 164 /* get the mapped selector source name */ 165 static int check_mapped_selector_name(struct mixer_build *state, int unitid, 166 int index, char *buf, int buflen) 167 { 168 const struct usbmix_selector_map *p; 169 170 if (!state->selector_map) 171 return 0; 172 for (p = state->selector_map; p->id; p++) { 173 if (p->id == unitid && index < p->count) 174 return strlcpy(buf, p->names[index], buflen); 175 } 176 return 0; 177 } 178 179 /* 180 * find an audio control unit with the given unit id 181 */ 182 static void *find_audio_control_unit(struct mixer_build *state, 183 unsigned char unit) 184 { 185 /* we just parse the header */ 186 struct uac_feature_unit_descriptor *hdr = NULL; 187 188 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr, 189 USB_DT_CS_INTERFACE)) != NULL) { 190 if (hdr->bLength >= 4 && 191 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL && 192 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER && 193 hdr->bUnitID == unit) 194 return hdr; 195 } 196 197 return NULL; 198 } 199 200 /* 201 * copy a string with the given id 202 */ 203 static int snd_usb_copy_string_desc(struct mixer_build *state, 204 int index, char *buf, int maxlen) 205 { 206 int len = usb_string(state->chip->dev, index, buf, maxlen - 1); 207 buf[len] = 0; 208 return len; 209 } 210 211 /* 212 * convert from the byte/word on usb descriptor to the zero-based integer 213 */ 214 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val) 215 { 216 switch (cval->val_type) { 217 case USB_MIXER_BOOLEAN: 218 return !!val; 219 case USB_MIXER_INV_BOOLEAN: 220 return !val; 221 case USB_MIXER_U8: 222 val &= 0xff; 223 break; 224 case USB_MIXER_S8: 225 val &= 0xff; 226 if (val >= 0x80) 227 val -= 0x100; 228 break; 229 case USB_MIXER_U16: 230 val &= 0xffff; 231 break; 232 case USB_MIXER_S16: 233 val &= 0xffff; 234 if (val >= 0x8000) 235 val -= 0x10000; 236 break; 237 } 238 return val; 239 } 240 241 /* 242 * convert from the zero-based int to the byte/word for usb descriptor 243 */ 244 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val) 245 { 246 switch (cval->val_type) { 247 case USB_MIXER_BOOLEAN: 248 return !!val; 249 case USB_MIXER_INV_BOOLEAN: 250 return !val; 251 case USB_MIXER_S8: 252 case USB_MIXER_U8: 253 return val & 0xff; 254 case USB_MIXER_S16: 255 case USB_MIXER_U16: 256 return val & 0xffff; 257 } 258 return 0; /* not reached */ 259 } 260 261 static int get_relative_value(struct usb_mixer_elem_info *cval, int val) 262 { 263 if (!cval->res) 264 cval->res = 1; 265 if (val < cval->min) 266 return 0; 267 else if (val >= cval->max) 268 return (cval->max - cval->min + cval->res - 1) / cval->res; 269 else 270 return (val - cval->min) / cval->res; 271 } 272 273 static int get_abs_value(struct usb_mixer_elem_info *cval, int val) 274 { 275 if (val < 0) 276 return cval->min; 277 if (!cval->res) 278 cval->res = 1; 279 val *= cval->res; 280 val += cval->min; 281 if (val > cval->max) 282 return cval->max; 283 return val; 284 } 285 286 static int uac2_ctl_value_size(int val_type) 287 { 288 switch (val_type) { 289 case USB_MIXER_S32: 290 case USB_MIXER_U32: 291 return 4; 292 case USB_MIXER_S16: 293 case USB_MIXER_U16: 294 return 2; 295 default: 296 return 1; 297 } 298 return 0; /* unreachable */ 299 } 300 301 302 /* 303 * retrieve a mixer value 304 */ 305 306 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, 307 int validx, int *value_ret) 308 { 309 struct snd_usb_audio *chip = cval->head.mixer->chip; 310 unsigned char buf[2]; 311 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 312 int timeout = 10; 313 int idx = 0, err; 314 315 err = snd_usb_lock_shutdown(chip); 316 if (err < 0) 317 return -EIO; 318 319 while (timeout-- > 0) { 320 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 321 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request, 322 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 323 validx, idx, buf, val_len) >= val_len) { 324 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); 325 err = 0; 326 goto out; 327 } 328 } 329 usb_audio_dbg(chip, 330 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 331 request, validx, idx, cval->val_type); 332 err = -EINVAL; 333 334 out: 335 snd_usb_unlock_shutdown(chip); 336 return err; 337 } 338 339 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, 340 int validx, int *value_ret) 341 { 342 struct snd_usb_audio *chip = cval->head.mixer->chip; 343 unsigned char buf[4 + 3 * sizeof(__u32)]; /* enough space for one range */ 344 unsigned char *val; 345 int idx = 0, ret, size; 346 __u8 bRequest; 347 348 if (request == UAC_GET_CUR) { 349 bRequest = UAC2_CS_CUR; 350 size = uac2_ctl_value_size(cval->val_type); 351 } else { 352 bRequest = UAC2_CS_RANGE; 353 size = sizeof(buf); 354 } 355 356 memset(buf, 0, sizeof(buf)); 357 358 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0; 359 if (ret) 360 goto error; 361 362 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 363 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest, 364 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 365 validx, idx, buf, size); 366 snd_usb_unlock_shutdown(chip); 367 368 if (ret < 0) { 369 error: 370 usb_audio_err(chip, 371 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 372 request, validx, idx, cval->val_type); 373 return ret; 374 } 375 376 /* FIXME: how should we handle multiple triplets here? */ 377 378 switch (request) { 379 case UAC_GET_CUR: 380 val = buf; 381 break; 382 case UAC_GET_MIN: 383 val = buf + sizeof(__u16); 384 break; 385 case UAC_GET_MAX: 386 val = buf + sizeof(__u16) * 2; 387 break; 388 case UAC_GET_RES: 389 val = buf + sizeof(__u16) * 3; 390 break; 391 default: 392 return -EINVAL; 393 } 394 395 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16))); 396 397 return 0; 398 } 399 400 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, 401 int validx, int *value_ret) 402 { 403 validx += cval->idx_off; 404 405 return (cval->head.mixer->protocol == UAC_VERSION_1) ? 406 get_ctl_value_v1(cval, request, validx, value_ret) : 407 get_ctl_value_v2(cval, request, validx, value_ret); 408 } 409 410 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, 411 int validx, int *value) 412 { 413 return get_ctl_value(cval, UAC_GET_CUR, validx, value); 414 } 415 416 /* channel = 0: master, 1 = first channel */ 417 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval, 418 int channel, int *value) 419 { 420 return get_ctl_value(cval, UAC_GET_CUR, 421 (cval->control << 8) | channel, 422 value); 423 } 424 425 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, 426 int channel, int index, int *value) 427 { 428 int err; 429 430 if (cval->cached & (1 << channel)) { 431 *value = cval->cache_val[index]; 432 return 0; 433 } 434 err = get_cur_mix_raw(cval, channel, value); 435 if (err < 0) { 436 if (!cval->head.mixer->ignore_ctl_error) 437 usb_audio_dbg(cval->head.mixer->chip, 438 "cannot get current value for control %d ch %d: err = %d\n", 439 cval->control, channel, err); 440 return err; 441 } 442 cval->cached |= 1 << channel; 443 cval->cache_val[index] = *value; 444 return 0; 445 } 446 447 /* 448 * set a mixer value 449 */ 450 451 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, 452 int request, int validx, int value_set) 453 { 454 struct snd_usb_audio *chip = cval->head.mixer->chip; 455 unsigned char buf[4]; 456 int idx = 0, val_len, err, timeout = 10; 457 458 validx += cval->idx_off; 459 460 if (cval->head.mixer->protocol == UAC_VERSION_1) { 461 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 462 } else { /* UAC_VERSION_2 */ 463 val_len = uac2_ctl_value_size(cval->val_type); 464 465 /* FIXME */ 466 if (request != UAC_SET_CUR) { 467 usb_audio_dbg(chip, "RANGE setting not yet supported\n"); 468 return -EINVAL; 469 } 470 471 request = UAC2_CS_CUR; 472 } 473 474 value_set = convert_bytes_value(cval, value_set); 475 buf[0] = value_set & 0xff; 476 buf[1] = (value_set >> 8) & 0xff; 477 buf[2] = (value_set >> 16) & 0xff; 478 buf[3] = (value_set >> 24) & 0xff; 479 480 err = snd_usb_lock_shutdown(chip); 481 if (err < 0) 482 return -EIO; 483 484 while (timeout-- > 0) { 485 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 486 if (snd_usb_ctl_msg(chip->dev, 487 usb_sndctrlpipe(chip->dev, 0), request, 488 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, 489 validx, idx, buf, val_len) >= 0) { 490 err = 0; 491 goto out; 492 } 493 } 494 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", 495 request, validx, idx, cval->val_type, buf[0], buf[1]); 496 err = -EINVAL; 497 498 out: 499 snd_usb_unlock_shutdown(chip); 500 return err; 501 } 502 503 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, 504 int validx, int value) 505 { 506 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value); 507 } 508 509 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, 510 int index, int value) 511 { 512 int err; 513 unsigned int read_only = (channel == 0) ? 514 cval->master_readonly : 515 cval->ch_readonly & (1 << (channel - 1)); 516 517 if (read_only) { 518 usb_audio_dbg(cval->head.mixer->chip, 519 "%s(): channel %d of control %d is read_only\n", 520 __func__, channel, cval->control); 521 return 0; 522 } 523 524 err = snd_usb_mixer_set_ctl_value(cval, 525 UAC_SET_CUR, (cval->control << 8) | channel, 526 value); 527 if (err < 0) 528 return err; 529 cval->cached |= 1 << channel; 530 cval->cache_val[index] = value; 531 return 0; 532 } 533 534 /* 535 * TLV callback for mixer volume controls 536 */ 537 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, 538 unsigned int size, unsigned int __user *_tlv) 539 { 540 struct usb_mixer_elem_info *cval = kcontrol->private_data; 541 DECLARE_TLV_DB_MINMAX(scale, 0, 0); 542 543 if (size < sizeof(scale)) 544 return -ENOMEM; 545 scale[2] = cval->dBmin; 546 scale[3] = cval->dBmax; 547 if (copy_to_user(_tlv, scale, sizeof(scale))) 548 return -EFAULT; 549 return 0; 550 } 551 552 /* 553 * parser routines begin here... 554 */ 555 556 static int parse_audio_unit(struct mixer_build *state, int unitid); 557 558 559 /* 560 * check if the input/output channel routing is enabled on the given bitmap. 561 * used for mixer unit parser 562 */ 563 static int check_matrix_bitmap(unsigned char *bmap, 564 int ich, int och, int num_outs) 565 { 566 int idx = ich * num_outs + och; 567 return bmap[idx >> 3] & (0x80 >> (idx & 7)); 568 } 569 570 /* 571 * add an alsa control element 572 * search and increment the index until an empty slot is found. 573 * 574 * if failed, give up and free the control instance. 575 */ 576 577 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list, 578 struct snd_kcontrol *kctl) 579 { 580 struct usb_mixer_interface *mixer = list->mixer; 581 int err; 582 583 while (snd_ctl_find_id(mixer->chip->card, &kctl->id)) 584 kctl->id.index++; 585 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) { 586 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n", 587 err); 588 return err; 589 } 590 list->kctl = kctl; 591 list->next_id_elem = mixer->id_elems[list->id]; 592 mixer->id_elems[list->id] = list; 593 return 0; 594 } 595 596 /* 597 * get a terminal name string 598 */ 599 600 static struct iterm_name_combo { 601 int type; 602 char *name; 603 } iterm_names[] = { 604 { 0x0300, "Output" }, 605 { 0x0301, "Speaker" }, 606 { 0x0302, "Headphone" }, 607 { 0x0303, "HMD Audio" }, 608 { 0x0304, "Desktop Speaker" }, 609 { 0x0305, "Room Speaker" }, 610 { 0x0306, "Com Speaker" }, 611 { 0x0307, "LFE" }, 612 { 0x0600, "External In" }, 613 { 0x0601, "Analog In" }, 614 { 0x0602, "Digital In" }, 615 { 0x0603, "Line" }, 616 { 0x0604, "Legacy In" }, 617 { 0x0605, "IEC958 In" }, 618 { 0x0606, "1394 DA Stream" }, 619 { 0x0607, "1394 DV Stream" }, 620 { 0x0700, "Embedded" }, 621 { 0x0701, "Noise Source" }, 622 { 0x0702, "Equalization Noise" }, 623 { 0x0703, "CD" }, 624 { 0x0704, "DAT" }, 625 { 0x0705, "DCC" }, 626 { 0x0706, "MiniDisk" }, 627 { 0x0707, "Analog Tape" }, 628 { 0x0708, "Phonograph" }, 629 { 0x0709, "VCR Audio" }, 630 { 0x070a, "Video Disk Audio" }, 631 { 0x070b, "DVD Audio" }, 632 { 0x070c, "TV Tuner Audio" }, 633 { 0x070d, "Satellite Rec Audio" }, 634 { 0x070e, "Cable Tuner Audio" }, 635 { 0x070f, "DSS Audio" }, 636 { 0x0710, "Radio Receiver" }, 637 { 0x0711, "Radio Transmitter" }, 638 { 0x0712, "Multi-Track Recorder" }, 639 { 0x0713, "Synthesizer" }, 640 { 0 }, 641 }; 642 643 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm, 644 unsigned char *name, int maxlen, int term_only) 645 { 646 struct iterm_name_combo *names; 647 648 if (iterm->name) 649 return snd_usb_copy_string_desc(state, iterm->name, 650 name, maxlen); 651 652 /* virtual type - not a real terminal */ 653 if (iterm->type >> 16) { 654 if (term_only) 655 return 0; 656 switch (iterm->type >> 16) { 657 case UAC_SELECTOR_UNIT: 658 strcpy(name, "Selector"); 659 return 8; 660 case UAC1_PROCESSING_UNIT: 661 strcpy(name, "Process Unit"); 662 return 12; 663 case UAC1_EXTENSION_UNIT: 664 strcpy(name, "Ext Unit"); 665 return 8; 666 case UAC_MIXER_UNIT: 667 strcpy(name, "Mixer"); 668 return 5; 669 default: 670 return sprintf(name, "Unit %d", iterm->id); 671 } 672 } 673 674 switch (iterm->type & 0xff00) { 675 case 0x0100: 676 strcpy(name, "PCM"); 677 return 3; 678 case 0x0200: 679 strcpy(name, "Mic"); 680 return 3; 681 case 0x0400: 682 strcpy(name, "Headset"); 683 return 7; 684 case 0x0500: 685 strcpy(name, "Phone"); 686 return 5; 687 } 688 689 for (names = iterm_names; names->type; names++) { 690 if (names->type == iterm->type) { 691 strcpy(name, names->name); 692 return strlen(names->name); 693 } 694 } 695 696 return 0; 697 } 698 699 /* 700 * parse the source unit recursively until it reaches to a terminal 701 * or a branched unit. 702 */ 703 static int check_input_term(struct mixer_build *state, int id, 704 struct usb_audio_term *term) 705 { 706 int err; 707 void *p1; 708 709 memset(term, 0, sizeof(*term)); 710 while ((p1 = find_audio_control_unit(state, id)) != NULL) { 711 unsigned char *hdr = p1; 712 term->id = id; 713 switch (hdr[2]) { 714 case UAC_INPUT_TERMINAL: 715 if (state->mixer->protocol == UAC_VERSION_1) { 716 struct uac_input_terminal_descriptor *d = p1; 717 term->type = le16_to_cpu(d->wTerminalType); 718 term->channels = d->bNrChannels; 719 term->chconfig = le16_to_cpu(d->wChannelConfig); 720 term->name = d->iTerminal; 721 } else { /* UAC_VERSION_2 */ 722 struct uac2_input_terminal_descriptor *d = p1; 723 724 /* call recursively to verify that the 725 * referenced clock entity is valid */ 726 err = check_input_term(state, d->bCSourceID, term); 727 if (err < 0) 728 return err; 729 730 /* save input term properties after recursion, 731 * to ensure they are not overriden by the 732 * recursion calls */ 733 term->id = id; 734 term->type = le16_to_cpu(d->wTerminalType); 735 term->channels = d->bNrChannels; 736 term->chconfig = le32_to_cpu(d->bmChannelConfig); 737 term->name = d->iTerminal; 738 } 739 return 0; 740 case UAC_FEATURE_UNIT: { 741 /* the header is the same for v1 and v2 */ 742 struct uac_feature_unit_descriptor *d = p1; 743 id = d->bSourceID; 744 break; /* continue to parse */ 745 } 746 case UAC_MIXER_UNIT: { 747 struct uac_mixer_unit_descriptor *d = p1; 748 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 749 term->channels = uac_mixer_unit_bNrChannels(d); 750 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol); 751 term->name = uac_mixer_unit_iMixer(d); 752 return 0; 753 } 754 case UAC_SELECTOR_UNIT: 755 case UAC2_CLOCK_SELECTOR: { 756 struct uac_selector_unit_descriptor *d = p1; 757 /* call recursively to retrieve the channel info */ 758 err = check_input_term(state, d->baSourceID[0], term); 759 if (err < 0) 760 return err; 761 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 762 term->id = id; 763 term->name = uac_selector_unit_iSelector(d); 764 return 0; 765 } 766 case UAC1_PROCESSING_UNIT: 767 case UAC1_EXTENSION_UNIT: 768 /* UAC2_PROCESSING_UNIT_V2 */ 769 /* UAC2_EFFECT_UNIT */ 770 case UAC2_EXTENSION_UNIT_V2: { 771 struct uac_processing_unit_descriptor *d = p1; 772 773 if (state->mixer->protocol == UAC_VERSION_2 && 774 hdr[2] == UAC2_EFFECT_UNIT) { 775 /* UAC2/UAC1 unit IDs overlap here in an 776 * uncompatible way. Ignore this unit for now. 777 */ 778 return 0; 779 } 780 781 if (d->bNrInPins) { 782 id = d->baSourceID[0]; 783 break; /* continue to parse */ 784 } 785 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 786 term->channels = uac_processing_unit_bNrChannels(d); 787 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol); 788 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol); 789 return 0; 790 } 791 case UAC2_CLOCK_SOURCE: { 792 struct uac_clock_source_descriptor *d = p1; 793 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 794 term->id = id; 795 term->name = d->iClockSource; 796 return 0; 797 } 798 default: 799 return -ENODEV; 800 } 801 } 802 return -ENODEV; 803 } 804 805 /* 806 * Feature Unit 807 */ 808 809 /* feature unit control information */ 810 struct usb_feature_control_info { 811 const char *name; 812 int type; /* data type for uac1 */ 813 int type_uac2; /* data type for uac2 if different from uac1, else -1 */ 814 }; 815 816 static struct usb_feature_control_info audio_feature_info[] = { 817 { "Mute", USB_MIXER_INV_BOOLEAN, -1 }, 818 { "Volume", USB_MIXER_S16, -1 }, 819 { "Tone Control - Bass", USB_MIXER_S8, -1 }, 820 { "Tone Control - Mid", USB_MIXER_S8, -1 }, 821 { "Tone Control - Treble", USB_MIXER_S8, -1 }, 822 { "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemeted yet */ 823 { "Auto Gain Control", USB_MIXER_BOOLEAN, -1 }, 824 { "Delay Control", USB_MIXER_U16, USB_MIXER_U32 }, 825 { "Bass Boost", USB_MIXER_BOOLEAN, -1 }, 826 { "Loudness", USB_MIXER_BOOLEAN, -1 }, 827 /* UAC2 specific */ 828 { "Input Gain Control", USB_MIXER_S16, -1 }, 829 { "Input Gain Pad Control", USB_MIXER_S16, -1 }, 830 { "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 }, 831 }; 832 833 /* private_free callback */ 834 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl) 835 { 836 kfree(kctl->private_data); 837 kctl->private_data = NULL; 838 } 839 840 /* 841 * interface to ALSA control for feature/mixer units 842 */ 843 844 /* volume control quirks */ 845 static void volume_control_quirks(struct usb_mixer_elem_info *cval, 846 struct snd_kcontrol *kctl) 847 { 848 struct snd_usb_audio *chip = cval->head.mixer->chip; 849 switch (chip->usb_id) { 850 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ 851 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */ 852 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 853 cval->min = 0x0000; 854 cval->max = 0xffff; 855 cval->res = 0x00e6; 856 break; 857 } 858 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 859 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 860 cval->min = 0x00; 861 cval->max = 0xff; 862 break; 863 } 864 if (strstr(kctl->id.name, "Effect Return") != NULL) { 865 cval->min = 0xb706; 866 cval->max = 0xff7b; 867 cval->res = 0x0073; 868 break; 869 } 870 if ((strstr(kctl->id.name, "Playback Volume") != NULL) || 871 (strstr(kctl->id.name, "Effect Send") != NULL)) { 872 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */ 873 cval->max = 0xfcfe; 874 cval->res = 0x0073; 875 } 876 break; 877 878 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */ 879 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */ 880 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 881 usb_audio_info(chip, 882 "set quirk for FTU Effect Duration\n"); 883 cval->min = 0x0000; 884 cval->max = 0x7f00; 885 cval->res = 0x0100; 886 break; 887 } 888 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 889 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 890 usb_audio_info(chip, 891 "set quirks for FTU Effect Feedback/Volume\n"); 892 cval->min = 0x00; 893 cval->max = 0x7f; 894 break; 895 } 896 break; 897 898 case USB_ID(0x0471, 0x0101): 899 case USB_ID(0x0471, 0x0104): 900 case USB_ID(0x0471, 0x0105): 901 case USB_ID(0x0672, 0x1041): 902 /* quirk for UDA1321/N101. 903 * note that detection between firmware 2.1.1.7 (N101) 904 * and later 2.1.1.21 is not very clear from datasheets. 905 * I hope that the min value is -15360 for newer firmware --jk 906 */ 907 if (!strcmp(kctl->id.name, "PCM Playback Volume") && 908 cval->min == -15616) { 909 usb_audio_info(chip, 910 "set volume quirk for UDA1321/N101 chip\n"); 911 cval->max = -256; 912 } 913 break; 914 915 case USB_ID(0x046d, 0x09a4): 916 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 917 usb_audio_info(chip, 918 "set volume quirk for QuickCam E3500\n"); 919 cval->min = 6080; 920 cval->max = 8768; 921 cval->res = 192; 922 } 923 break; 924 925 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */ 926 case USB_ID(0x046d, 0x0808): 927 case USB_ID(0x046d, 0x0809): 928 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */ 929 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */ 930 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */ 931 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */ 932 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */ 933 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */ 934 case USB_ID(0x046d, 0x0991): 935 case USB_ID(0x046d, 0x09a2): /* QuickCam Communicate Deluxe/S7500 */ 936 /* Most audio usb devices lie about volume resolution. 937 * Most Logitech webcams have res = 384. 938 * Probably there is some logitech magic behind this number --fishor 939 */ 940 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 941 usb_audio_info(chip, 942 "set resolution quirk: cval->res = 384\n"); 943 cval->res = 384; 944 } 945 break; 946 } 947 } 948 949 /* 950 * retrieve the minimum and maximum values for the specified control 951 */ 952 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval, 953 int default_min, struct snd_kcontrol *kctl) 954 { 955 /* for failsafe */ 956 cval->min = default_min; 957 cval->max = cval->min + 1; 958 cval->res = 1; 959 cval->dBmin = cval->dBmax = 0; 960 961 if (cval->val_type == USB_MIXER_BOOLEAN || 962 cval->val_type == USB_MIXER_INV_BOOLEAN) { 963 cval->initialized = 1; 964 } else { 965 int minchn = 0; 966 if (cval->cmask) { 967 int i; 968 for (i = 0; i < MAX_CHANNELS; i++) 969 if (cval->cmask & (1 << i)) { 970 minchn = i + 1; 971 break; 972 } 973 } 974 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 || 975 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) { 976 usb_audio_err(cval->head.mixer->chip, 977 "%d:%d: cannot get min/max values for control %d (id %d)\n", 978 cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip), 979 cval->control, cval->head.id); 980 return -EINVAL; 981 } 982 if (get_ctl_value(cval, UAC_GET_RES, 983 (cval->control << 8) | minchn, 984 &cval->res) < 0) { 985 cval->res = 1; 986 } else { 987 int last_valid_res = cval->res; 988 989 while (cval->res > 1) { 990 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES, 991 (cval->control << 8) | minchn, 992 cval->res / 2) < 0) 993 break; 994 cval->res /= 2; 995 } 996 if (get_ctl_value(cval, UAC_GET_RES, 997 (cval->control << 8) | minchn, &cval->res) < 0) 998 cval->res = last_valid_res; 999 } 1000 if (cval->res == 0) 1001 cval->res = 1; 1002 1003 /* Additional checks for the proper resolution 1004 * 1005 * Some devices report smaller resolutions than actually 1006 * reacting. They don't return errors but simply clip 1007 * to the lower aligned value. 1008 */ 1009 if (cval->min + cval->res < cval->max) { 1010 int last_valid_res = cval->res; 1011 int saved, test, check; 1012 get_cur_mix_raw(cval, minchn, &saved); 1013 for (;;) { 1014 test = saved; 1015 if (test < cval->max) 1016 test += cval->res; 1017 else 1018 test -= cval->res; 1019 if (test < cval->min || test > cval->max || 1020 snd_usb_set_cur_mix_value(cval, minchn, 0, test) || 1021 get_cur_mix_raw(cval, minchn, &check)) { 1022 cval->res = last_valid_res; 1023 break; 1024 } 1025 if (test == check) 1026 break; 1027 cval->res *= 2; 1028 } 1029 snd_usb_set_cur_mix_value(cval, minchn, 0, saved); 1030 } 1031 1032 cval->initialized = 1; 1033 } 1034 1035 if (kctl) 1036 volume_control_quirks(cval, kctl); 1037 1038 /* USB descriptions contain the dB scale in 1/256 dB unit 1039 * while ALSA TLV contains in 1/100 dB unit 1040 */ 1041 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; 1042 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; 1043 if (cval->dBmin > cval->dBmax) { 1044 /* something is wrong; assume it's either from/to 0dB */ 1045 if (cval->dBmin < 0) 1046 cval->dBmax = 0; 1047 else if (cval->dBmin > 0) 1048 cval->dBmin = 0; 1049 if (cval->dBmin > cval->dBmax) { 1050 /* totally crap, return an error */ 1051 return -EINVAL; 1052 } 1053 } 1054 1055 return 0; 1056 } 1057 1058 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL) 1059 1060 /* get a feature/mixer unit info */ 1061 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, 1062 struct snd_ctl_elem_info *uinfo) 1063 { 1064 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1065 1066 if (cval->val_type == USB_MIXER_BOOLEAN || 1067 cval->val_type == USB_MIXER_INV_BOOLEAN) 1068 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 1069 else 1070 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 1071 uinfo->count = cval->channels; 1072 if (cval->val_type == USB_MIXER_BOOLEAN || 1073 cval->val_type == USB_MIXER_INV_BOOLEAN) { 1074 uinfo->value.integer.min = 0; 1075 uinfo->value.integer.max = 1; 1076 } else { 1077 if (!cval->initialized) { 1078 get_min_max_with_quirks(cval, 0, kcontrol); 1079 if (cval->initialized && cval->dBmin >= cval->dBmax) { 1080 kcontrol->vd[0].access &= 1081 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1082 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); 1083 snd_ctl_notify(cval->head.mixer->chip->card, 1084 SNDRV_CTL_EVENT_MASK_INFO, 1085 &kcontrol->id); 1086 } 1087 } 1088 uinfo->value.integer.min = 0; 1089 uinfo->value.integer.max = 1090 (cval->max - cval->min + cval->res - 1) / cval->res; 1091 } 1092 return 0; 1093 } 1094 1095 /* get the current value from feature/mixer unit */ 1096 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, 1097 struct snd_ctl_elem_value *ucontrol) 1098 { 1099 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1100 int c, cnt, val, err; 1101 1102 ucontrol->value.integer.value[0] = cval->min; 1103 if (cval->cmask) { 1104 cnt = 0; 1105 for (c = 0; c < MAX_CHANNELS; c++) { 1106 if (!(cval->cmask & (1 << c))) 1107 continue; 1108 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val); 1109 if (err < 0) 1110 return filter_error(cval, err); 1111 val = get_relative_value(cval, val); 1112 ucontrol->value.integer.value[cnt] = val; 1113 cnt++; 1114 } 1115 return 0; 1116 } else { 1117 /* master channel */ 1118 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val); 1119 if (err < 0) 1120 return filter_error(cval, err); 1121 val = get_relative_value(cval, val); 1122 ucontrol->value.integer.value[0] = val; 1123 } 1124 return 0; 1125 } 1126 1127 /* put the current value to feature/mixer unit */ 1128 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, 1129 struct snd_ctl_elem_value *ucontrol) 1130 { 1131 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1132 int c, cnt, val, oval, err; 1133 int changed = 0; 1134 1135 if (cval->cmask) { 1136 cnt = 0; 1137 for (c = 0; c < MAX_CHANNELS; c++) { 1138 if (!(cval->cmask & (1 << c))) 1139 continue; 1140 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval); 1141 if (err < 0) 1142 return filter_error(cval, err); 1143 val = ucontrol->value.integer.value[cnt]; 1144 val = get_abs_value(cval, val); 1145 if (oval != val) { 1146 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val); 1147 changed = 1; 1148 } 1149 cnt++; 1150 } 1151 } else { 1152 /* master channel */ 1153 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval); 1154 if (err < 0) 1155 return filter_error(cval, err); 1156 val = ucontrol->value.integer.value[0]; 1157 val = get_abs_value(cval, val); 1158 if (val != oval) { 1159 snd_usb_set_cur_mix_value(cval, 0, 0, val); 1160 changed = 1; 1161 } 1162 } 1163 return changed; 1164 } 1165 1166 static struct snd_kcontrol_new usb_feature_unit_ctl = { 1167 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1168 .name = "", /* will be filled later manually */ 1169 .info = mixer_ctl_feature_info, 1170 .get = mixer_ctl_feature_get, 1171 .put = mixer_ctl_feature_put, 1172 }; 1173 1174 /* the read-only variant */ 1175 static const struct snd_kcontrol_new usb_feature_unit_ctl_ro = { 1176 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1177 .name = "", /* will be filled later manually */ 1178 .info = mixer_ctl_feature_info, 1179 .get = mixer_ctl_feature_get, 1180 .put = NULL, 1181 }; 1182 1183 /* 1184 * This symbol is exported in order to allow the mixer quirks to 1185 * hook up to the standard feature unit control mechanism 1186 */ 1187 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl; 1188 1189 /* 1190 * build a feature control 1191 */ 1192 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str) 1193 { 1194 return strlcat(kctl->id.name, str, sizeof(kctl->id.name)); 1195 } 1196 1197 /* 1198 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we 1199 * rename it to "Headphone". We determine if something is a headphone 1200 * similar to how udev determines form factor. 1201 */ 1202 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl, 1203 struct snd_card *card) 1204 { 1205 const char *names_to_check[] = { 1206 "Headset", "headset", "Headphone", "headphone", NULL}; 1207 const char **s; 1208 bool found = false; 1209 1210 if (strcmp("Speaker", kctl->id.name)) 1211 return; 1212 1213 for (s = names_to_check; *s; s++) 1214 if (strstr(card->shortname, *s)) { 1215 found = true; 1216 break; 1217 } 1218 1219 if (!found) 1220 return; 1221 1222 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name)); 1223 } 1224 1225 static void build_feature_ctl(struct mixer_build *state, void *raw_desc, 1226 unsigned int ctl_mask, int control, 1227 struct usb_audio_term *iterm, int unitid, 1228 int readonly_mask) 1229 { 1230 struct uac_feature_unit_descriptor *desc = raw_desc; 1231 struct usb_feature_control_info *ctl_info; 1232 unsigned int len = 0; 1233 int mapped_name = 0; 1234 int nameid = uac_feature_unit_iFeature(desc); 1235 struct snd_kcontrol *kctl; 1236 struct usb_mixer_elem_info *cval; 1237 const struct usbmix_name_map *map; 1238 unsigned int range; 1239 1240 control++; /* change from zero-based to 1-based value */ 1241 1242 if (control == UAC_FU_GRAPHIC_EQUALIZER) { 1243 /* FIXME: not supported yet */ 1244 return; 1245 } 1246 1247 map = find_map(state, unitid, control); 1248 if (check_ignored_ctl(map)) 1249 return; 1250 1251 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1252 if (!cval) 1253 return; 1254 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1255 cval->control = control; 1256 cval->cmask = ctl_mask; 1257 ctl_info = &audio_feature_info[control-1]; 1258 if (state->mixer->protocol == UAC_VERSION_1) 1259 cval->val_type = ctl_info->type; 1260 else /* UAC_VERSION_2 */ 1261 cval->val_type = ctl_info->type_uac2 >= 0 ? 1262 ctl_info->type_uac2 : ctl_info->type; 1263 1264 if (ctl_mask == 0) { 1265 cval->channels = 1; /* master channel */ 1266 cval->master_readonly = readonly_mask; 1267 } else { 1268 int i, c = 0; 1269 for (i = 0; i < 16; i++) 1270 if (ctl_mask & (1 << i)) 1271 c++; 1272 cval->channels = c; 1273 cval->ch_readonly = readonly_mask; 1274 } 1275 1276 /* 1277 * If all channels in the mask are marked read-only, make the control 1278 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't 1279 * issue write commands to read-only channels. 1280 */ 1281 if (cval->channels == readonly_mask) 1282 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); 1283 else 1284 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1285 1286 if (!kctl) { 1287 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 1288 kfree(cval); 1289 return; 1290 } 1291 kctl->private_free = snd_usb_mixer_elem_free; 1292 1293 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1294 mapped_name = len != 0; 1295 if (!len && nameid) 1296 len = snd_usb_copy_string_desc(state, nameid, 1297 kctl->id.name, sizeof(kctl->id.name)); 1298 1299 switch (control) { 1300 case UAC_FU_MUTE: 1301 case UAC_FU_VOLUME: 1302 /* 1303 * determine the control name. the rule is: 1304 * - if a name id is given in descriptor, use it. 1305 * - if the connected input can be determined, then use the name 1306 * of terminal type. 1307 * - if the connected output can be determined, use it. 1308 * - otherwise, anonymous name. 1309 */ 1310 if (!len) { 1311 len = get_term_name(state, iterm, kctl->id.name, 1312 sizeof(kctl->id.name), 1); 1313 if (!len) 1314 len = get_term_name(state, &state->oterm, 1315 kctl->id.name, 1316 sizeof(kctl->id.name), 1); 1317 if (!len) 1318 snprintf(kctl->id.name, sizeof(kctl->id.name), 1319 "Feature %d", unitid); 1320 } 1321 1322 if (!mapped_name) 1323 check_no_speaker_on_headset(kctl, state->mixer->chip->card); 1324 1325 /* 1326 * determine the stream direction: 1327 * if the connected output is USB stream, then it's likely a 1328 * capture stream. otherwise it should be playback (hopefully :) 1329 */ 1330 if (!mapped_name && !(state->oterm.type >> 16)) { 1331 if ((state->oterm.type & 0xff00) == 0x0100) 1332 append_ctl_name(kctl, " Capture"); 1333 else 1334 append_ctl_name(kctl, " Playback"); 1335 } 1336 append_ctl_name(kctl, control == UAC_FU_MUTE ? 1337 " Switch" : " Volume"); 1338 break; 1339 default: 1340 if (!len) 1341 strlcpy(kctl->id.name, audio_feature_info[control-1].name, 1342 sizeof(kctl->id.name)); 1343 break; 1344 } 1345 1346 /* get min/max values */ 1347 get_min_max_with_quirks(cval, 0, kctl); 1348 1349 if (control == UAC_FU_VOLUME) { 1350 check_mapped_dB(map, cval); 1351 if (cval->dBmin < cval->dBmax || !cval->initialized) { 1352 kctl->tlv.c = snd_usb_mixer_vol_tlv; 1353 kctl->vd[0].access |= 1354 SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1355 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; 1356 } 1357 } 1358 1359 snd_usb_mixer_fu_apply_quirk(state->mixer, cval, unitid, kctl); 1360 1361 range = (cval->max - cval->min) / cval->res; 1362 /* 1363 * Are there devices with volume range more than 255? I use a bit more 1364 * to be sure. 384 is a resolution magic number found on Logitech 1365 * devices. It will definitively catch all buggy Logitech devices. 1366 */ 1367 if (range > 384) { 1368 usb_audio_warn(state->chip, 1369 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.", 1370 range); 1371 usb_audio_warn(state->chip, 1372 "[%d] FU [%s] ch = %d, val = %d/%d/%d", 1373 cval->head.id, kctl->id.name, cval->channels, 1374 cval->min, cval->max, cval->res); 1375 } 1376 1377 usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n", 1378 cval->head.id, kctl->id.name, cval->channels, 1379 cval->min, cval->max, cval->res); 1380 snd_usb_mixer_add_control(&cval->head, kctl); 1381 } 1382 1383 static int parse_clock_source_unit(struct mixer_build *state, int unitid, 1384 void *_ftr) 1385 { 1386 struct uac_clock_source_descriptor *hdr = _ftr; 1387 struct usb_mixer_elem_info *cval; 1388 struct snd_kcontrol *kctl; 1389 char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; 1390 int ret; 1391 1392 if (state->mixer->protocol != UAC_VERSION_2) 1393 return -EINVAL; 1394 1395 if (hdr->bLength != sizeof(*hdr)) { 1396 usb_audio_dbg(state->chip, 1397 "Bogus clock source descriptor length of %d, ignoring.\n", 1398 hdr->bLength); 1399 return 0; 1400 } 1401 1402 /* 1403 * The only property of this unit we are interested in is the 1404 * clock source validity. If that isn't readable, just bail out. 1405 */ 1406 if (!uac2_control_is_readable(hdr->bmControls, 1407 ilog2(UAC2_CS_CONTROL_CLOCK_VALID))) 1408 return 0; 1409 1410 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1411 if (!cval) 1412 return -ENOMEM; 1413 1414 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, hdr->bClockID); 1415 1416 cval->min = 0; 1417 cval->max = 1; 1418 cval->channels = 1; 1419 cval->val_type = USB_MIXER_BOOLEAN; 1420 cval->control = UAC2_CS_CONTROL_CLOCK_VALID; 1421 1422 if (uac2_control_is_writeable(hdr->bmControls, 1423 ilog2(UAC2_CS_CONTROL_CLOCK_VALID))) 1424 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1425 else { 1426 cval->master_readonly = 1; 1427 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); 1428 } 1429 1430 if (!kctl) { 1431 kfree(cval); 1432 return -ENOMEM; 1433 } 1434 1435 kctl->private_free = snd_usb_mixer_elem_free; 1436 ret = snd_usb_copy_string_desc(state, hdr->iClockSource, 1437 name, sizeof(name)); 1438 if (ret > 0) 1439 snprintf(kctl->id.name, sizeof(kctl->id.name), 1440 "%s Validity", name); 1441 else 1442 snprintf(kctl->id.name, sizeof(kctl->id.name), 1443 "Clock Source %d Validity", hdr->bClockID); 1444 1445 return snd_usb_mixer_add_control(&cval->head, kctl); 1446 } 1447 1448 /* 1449 * parse a feature unit 1450 * 1451 * most of controls are defined here. 1452 */ 1453 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, 1454 void *_ftr) 1455 { 1456 int channels, i, j; 1457 struct usb_audio_term iterm; 1458 unsigned int master_bits, first_ch_bits; 1459 int err, csize; 1460 struct uac_feature_unit_descriptor *hdr = _ftr; 1461 __u8 *bmaControls; 1462 1463 if (state->mixer->protocol == UAC_VERSION_1) { 1464 csize = hdr->bControlSize; 1465 if (!csize) { 1466 usb_audio_dbg(state->chip, 1467 "unit %u: invalid bControlSize == 0\n", 1468 unitid); 1469 return -EINVAL; 1470 } 1471 channels = (hdr->bLength - 7) / csize - 1; 1472 bmaControls = hdr->bmaControls; 1473 if (hdr->bLength < 7 + csize) { 1474 usb_audio_err(state->chip, 1475 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", 1476 unitid); 1477 return -EINVAL; 1478 } 1479 } else { 1480 struct uac2_feature_unit_descriptor *ftr = _ftr; 1481 csize = 4; 1482 channels = (hdr->bLength - 6) / 4 - 1; 1483 bmaControls = ftr->bmaControls; 1484 if (hdr->bLength < 6 + csize) { 1485 usb_audio_err(state->chip, 1486 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", 1487 unitid); 1488 return -EINVAL; 1489 } 1490 } 1491 1492 /* parse the source unit */ 1493 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0) 1494 return err; 1495 1496 /* determine the input source type and name */ 1497 err = check_input_term(state, hdr->bSourceID, &iterm); 1498 if (err < 0) 1499 return err; 1500 1501 master_bits = snd_usb_combine_bytes(bmaControls, csize); 1502 /* master configuration quirks */ 1503 switch (state->chip->usb_id) { 1504 case USB_ID(0x08bb, 0x2702): 1505 usb_audio_info(state->chip, 1506 "usbmixer: master volume quirk for PCM2702 chip\n"); 1507 /* disable non-functional volume control */ 1508 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME); 1509 break; 1510 case USB_ID(0x1130, 0xf211): 1511 usb_audio_info(state->chip, 1512 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n"); 1513 /* disable non-functional volume control */ 1514 channels = 0; 1515 break; 1516 1517 } 1518 if (channels > 0) 1519 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize); 1520 else 1521 first_ch_bits = 0; 1522 1523 if (state->mixer->protocol == UAC_VERSION_1) { 1524 /* check all control types */ 1525 for (i = 0; i < 10; i++) { 1526 unsigned int ch_bits = 0; 1527 for (j = 0; j < channels; j++) { 1528 unsigned int mask; 1529 1530 mask = snd_usb_combine_bytes(bmaControls + 1531 csize * (j+1), csize); 1532 if (mask & (1 << i)) 1533 ch_bits |= (1 << j); 1534 } 1535 /* audio class v1 controls are never read-only */ 1536 1537 /* 1538 * The first channel must be set 1539 * (for ease of programming). 1540 */ 1541 if (ch_bits & 1) 1542 build_feature_ctl(state, _ftr, ch_bits, i, 1543 &iterm, unitid, 0); 1544 if (master_bits & (1 << i)) 1545 build_feature_ctl(state, _ftr, 0, i, &iterm, 1546 unitid, 0); 1547 } 1548 } else { /* UAC_VERSION_2 */ 1549 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) { 1550 unsigned int ch_bits = 0; 1551 unsigned int ch_read_only = 0; 1552 1553 for (j = 0; j < channels; j++) { 1554 unsigned int mask; 1555 1556 mask = snd_usb_combine_bytes(bmaControls + 1557 csize * (j+1), csize); 1558 if (uac2_control_is_readable(mask, i)) { 1559 ch_bits |= (1 << j); 1560 if (!uac2_control_is_writeable(mask, i)) 1561 ch_read_only |= (1 << j); 1562 } 1563 } 1564 1565 /* 1566 * NOTE: build_feature_ctl() will mark the control 1567 * read-only if all channels are marked read-only in 1568 * the descriptors. Otherwise, the control will be 1569 * reported as writeable, but the driver will not 1570 * actually issue a write command for read-only 1571 * channels. 1572 */ 1573 1574 /* 1575 * The first channel must be set 1576 * (for ease of programming). 1577 */ 1578 if (ch_bits & 1) 1579 build_feature_ctl(state, _ftr, ch_bits, i, 1580 &iterm, unitid, ch_read_only); 1581 if (uac2_control_is_readable(master_bits, i)) 1582 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 1583 !uac2_control_is_writeable(master_bits, i)); 1584 } 1585 } 1586 1587 return 0; 1588 } 1589 1590 /* 1591 * Mixer Unit 1592 */ 1593 1594 /* 1595 * build a mixer unit control 1596 * 1597 * the callbacks are identical with feature unit. 1598 * input channel number (zero based) is given in control field instead. 1599 */ 1600 static void build_mixer_unit_ctl(struct mixer_build *state, 1601 struct uac_mixer_unit_descriptor *desc, 1602 int in_pin, int in_ch, int unitid, 1603 struct usb_audio_term *iterm) 1604 { 1605 struct usb_mixer_elem_info *cval; 1606 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc); 1607 unsigned int i, len; 1608 struct snd_kcontrol *kctl; 1609 const struct usbmix_name_map *map; 1610 1611 map = find_map(state, unitid, 0); 1612 if (check_ignored_ctl(map)) 1613 return; 1614 1615 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1616 if (!cval) 1617 return; 1618 1619 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1620 cval->control = in_ch + 1; /* based on 1 */ 1621 cval->val_type = USB_MIXER_S16; 1622 for (i = 0; i < num_outs; i++) { 1623 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); 1624 1625 if (check_matrix_bitmap(c, in_ch, i, num_outs)) { 1626 cval->cmask |= (1 << i); 1627 cval->channels++; 1628 } 1629 } 1630 1631 /* get min/max values */ 1632 get_min_max(cval, 0); 1633 1634 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1635 if (!kctl) { 1636 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 1637 kfree(cval); 1638 return; 1639 } 1640 kctl->private_free = snd_usb_mixer_elem_free; 1641 1642 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1643 if (!len) 1644 len = get_term_name(state, iterm, kctl->id.name, 1645 sizeof(kctl->id.name), 0); 1646 if (!len) 1647 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1); 1648 append_ctl_name(kctl, " Volume"); 1649 1650 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n", 1651 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max); 1652 snd_usb_mixer_add_control(&cval->head, kctl); 1653 } 1654 1655 /* 1656 * parse a mixer unit 1657 */ 1658 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, 1659 void *raw_desc) 1660 { 1661 struct uac_mixer_unit_descriptor *desc = raw_desc; 1662 struct usb_audio_term iterm; 1663 int input_pins, num_ins, num_outs; 1664 int pin, ich, err; 1665 1666 if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) || 1667 !(num_outs = uac_mixer_unit_bNrChannels(desc))) { 1668 usb_audio_err(state->chip, 1669 "invalid MIXER UNIT descriptor %d\n", 1670 unitid); 1671 return -EINVAL; 1672 } 1673 1674 num_ins = 0; 1675 ich = 0; 1676 for (pin = 0; pin < input_pins; pin++) { 1677 err = parse_audio_unit(state, desc->baSourceID[pin]); 1678 if (err < 0) 1679 continue; 1680 /* no bmControls field (e.g. Maya44) -> ignore */ 1681 if (desc->bLength <= 10 + input_pins) 1682 continue; 1683 err = check_input_term(state, desc->baSourceID[pin], &iterm); 1684 if (err < 0) 1685 return err; 1686 num_ins += iterm.channels; 1687 for (; ich < num_ins; ich++) { 1688 int och, ich_has_controls = 0; 1689 1690 for (och = 0; och < num_outs; och++) { 1691 __u8 *c = uac_mixer_unit_bmControls(desc, 1692 state->mixer->protocol); 1693 1694 if (check_matrix_bitmap(c, ich, och, num_outs)) { 1695 ich_has_controls = 1; 1696 break; 1697 } 1698 } 1699 if (ich_has_controls) 1700 build_mixer_unit_ctl(state, desc, pin, ich, 1701 unitid, &iterm); 1702 } 1703 } 1704 return 0; 1705 } 1706 1707 /* 1708 * Processing Unit / Extension Unit 1709 */ 1710 1711 /* get callback for processing/extension unit */ 1712 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, 1713 struct snd_ctl_elem_value *ucontrol) 1714 { 1715 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1716 int err, val; 1717 1718 err = get_cur_ctl_value(cval, cval->control << 8, &val); 1719 if (err < 0) { 1720 ucontrol->value.integer.value[0] = cval->min; 1721 return filter_error(cval, err); 1722 } 1723 val = get_relative_value(cval, val); 1724 ucontrol->value.integer.value[0] = val; 1725 return 0; 1726 } 1727 1728 /* put callback for processing/extension unit */ 1729 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, 1730 struct snd_ctl_elem_value *ucontrol) 1731 { 1732 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1733 int val, oval, err; 1734 1735 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 1736 if (err < 0) 1737 return filter_error(cval, err); 1738 val = ucontrol->value.integer.value[0]; 1739 val = get_abs_value(cval, val); 1740 if (val != oval) { 1741 set_cur_ctl_value(cval, cval->control << 8, val); 1742 return 1; 1743 } 1744 return 0; 1745 } 1746 1747 /* alsa control interface for processing/extension unit */ 1748 static const struct snd_kcontrol_new mixer_procunit_ctl = { 1749 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1750 .name = "", /* will be filled later */ 1751 .info = mixer_ctl_feature_info, 1752 .get = mixer_ctl_procunit_get, 1753 .put = mixer_ctl_procunit_put, 1754 }; 1755 1756 /* 1757 * predefined data for processing units 1758 */ 1759 struct procunit_value_info { 1760 int control; 1761 char *suffix; 1762 int val_type; 1763 int min_value; 1764 }; 1765 1766 struct procunit_info { 1767 int type; 1768 char *name; 1769 struct procunit_value_info *values; 1770 }; 1771 1772 static struct procunit_value_info updown_proc_info[] = { 1773 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1774 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 1775 { 0 } 1776 }; 1777 static struct procunit_value_info prologic_proc_info[] = { 1778 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1779 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 1780 { 0 } 1781 }; 1782 static struct procunit_value_info threed_enh_proc_info[] = { 1783 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1784 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 }, 1785 { 0 } 1786 }; 1787 static struct procunit_value_info reverb_proc_info[] = { 1788 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1789 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, 1790 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 }, 1791 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 }, 1792 { 0 } 1793 }; 1794 static struct procunit_value_info chorus_proc_info[] = { 1795 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1796 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, 1797 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, 1798 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, 1799 { 0 } 1800 }; 1801 static struct procunit_value_info dcr_proc_info[] = { 1802 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1803 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 }, 1804 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 }, 1805 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, 1806 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 }, 1807 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 }, 1808 { 0 } 1809 }; 1810 1811 static struct procunit_info procunits[] = { 1812 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info }, 1813 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info }, 1814 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info }, 1815 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info }, 1816 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info }, 1817 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info }, 1818 { 0 }, 1819 }; 1820 /* 1821 * predefined data for extension units 1822 */ 1823 static struct procunit_value_info clock_rate_xu_info[] = { 1824 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, 1825 { 0 } 1826 }; 1827 static struct procunit_value_info clock_source_xu_info[] = { 1828 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, 1829 { 0 } 1830 }; 1831 static struct procunit_value_info spdif_format_xu_info[] = { 1832 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, 1833 { 0 } 1834 }; 1835 static struct procunit_value_info soft_limit_xu_info[] = { 1836 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, 1837 { 0 } 1838 }; 1839 static struct procunit_info extunits[] = { 1840 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info }, 1841 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info }, 1842 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info }, 1843 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info }, 1844 { 0 } 1845 }; 1846 1847 /* 1848 * build a processing/extension unit 1849 */ 1850 static int build_audio_procunit(struct mixer_build *state, int unitid, 1851 void *raw_desc, struct procunit_info *list, 1852 char *name) 1853 { 1854 struct uac_processing_unit_descriptor *desc = raw_desc; 1855 int num_ins = desc->bNrInPins; 1856 struct usb_mixer_elem_info *cval; 1857 struct snd_kcontrol *kctl; 1858 int i, err, nameid, type, len; 1859 struct procunit_info *info; 1860 struct procunit_value_info *valinfo; 1861 const struct usbmix_name_map *map; 1862 static struct procunit_value_info default_value_info[] = { 1863 { 0x01, "Switch", USB_MIXER_BOOLEAN }, 1864 { 0 } 1865 }; 1866 static struct procunit_info default_info = { 1867 0, NULL, default_value_info 1868 }; 1869 1870 if (desc->bLength < 13 || desc->bLength < 13 + num_ins || 1871 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { 1872 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); 1873 return -EINVAL; 1874 } 1875 1876 for (i = 0; i < num_ins; i++) { 1877 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 1878 return err; 1879 } 1880 1881 type = le16_to_cpu(desc->wProcessType); 1882 for (info = list; info && info->type; info++) 1883 if (info->type == type) 1884 break; 1885 if (!info || !info->type) 1886 info = &default_info; 1887 1888 for (valinfo = info->values; valinfo->control; valinfo++) { 1889 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol); 1890 1891 if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1)))) 1892 continue; 1893 map = find_map(state, unitid, valinfo->control); 1894 if (check_ignored_ctl(map)) 1895 continue; 1896 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1897 if (!cval) 1898 return -ENOMEM; 1899 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1900 cval->control = valinfo->control; 1901 cval->val_type = valinfo->val_type; 1902 cval->channels = 1; 1903 1904 /* get min/max values */ 1905 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) { 1906 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol); 1907 /* FIXME: hard-coded */ 1908 cval->min = 1; 1909 cval->max = control_spec[0]; 1910 cval->res = 1; 1911 cval->initialized = 1; 1912 } else { 1913 if (type == USB_XU_CLOCK_RATE) { 1914 /* 1915 * E-Mu USB 0404/0202/TrackerPre/0204 1916 * samplerate control quirk 1917 */ 1918 cval->min = 0; 1919 cval->max = 5; 1920 cval->res = 1; 1921 cval->initialized = 1; 1922 } else 1923 get_min_max(cval, valinfo->min_value); 1924 } 1925 1926 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); 1927 if (!kctl) { 1928 kfree(cval); 1929 return -ENOMEM; 1930 } 1931 kctl->private_free = snd_usb_mixer_elem_free; 1932 1933 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) { 1934 /* nothing */ ; 1935 } else if (info->name) { 1936 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name)); 1937 } else { 1938 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); 1939 len = 0; 1940 if (nameid) 1941 len = snd_usb_copy_string_desc(state, nameid, 1942 kctl->id.name, 1943 sizeof(kctl->id.name)); 1944 if (!len) 1945 strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); 1946 } 1947 append_ctl_name(kctl, " "); 1948 append_ctl_name(kctl, valinfo->suffix); 1949 1950 usb_audio_dbg(state->chip, 1951 "[%d] PU [%s] ch = %d, val = %d/%d\n", 1952 cval->head.id, kctl->id.name, cval->channels, 1953 cval->min, cval->max); 1954 1955 err = snd_usb_mixer_add_control(&cval->head, kctl); 1956 if (err < 0) 1957 return err; 1958 } 1959 return 0; 1960 } 1961 1962 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, 1963 void *raw_desc) 1964 { 1965 return build_audio_procunit(state, unitid, raw_desc, 1966 procunits, "Processing Unit"); 1967 } 1968 1969 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, 1970 void *raw_desc) 1971 { 1972 /* 1973 * Note that we parse extension units with processing unit descriptors. 1974 * That's ok as the layout is the same. 1975 */ 1976 return build_audio_procunit(state, unitid, raw_desc, 1977 extunits, "Extension Unit"); 1978 } 1979 1980 /* 1981 * Selector Unit 1982 */ 1983 1984 /* 1985 * info callback for selector unit 1986 * use an enumerator type for routing 1987 */ 1988 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, 1989 struct snd_ctl_elem_info *uinfo) 1990 { 1991 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1992 const char **itemlist = (const char **)kcontrol->private_value; 1993 1994 if (snd_BUG_ON(!itemlist)) 1995 return -EINVAL; 1996 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist); 1997 } 1998 1999 /* get callback for selector unit */ 2000 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, 2001 struct snd_ctl_elem_value *ucontrol) 2002 { 2003 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2004 int val, err; 2005 2006 err = get_cur_ctl_value(cval, cval->control << 8, &val); 2007 if (err < 0) { 2008 ucontrol->value.enumerated.item[0] = 0; 2009 return filter_error(cval, err); 2010 } 2011 val = get_relative_value(cval, val); 2012 ucontrol->value.enumerated.item[0] = val; 2013 return 0; 2014 } 2015 2016 /* put callback for selector unit */ 2017 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, 2018 struct snd_ctl_elem_value *ucontrol) 2019 { 2020 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2021 int val, oval, err; 2022 2023 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 2024 if (err < 0) 2025 return filter_error(cval, err); 2026 val = ucontrol->value.enumerated.item[0]; 2027 val = get_abs_value(cval, val); 2028 if (val != oval) { 2029 set_cur_ctl_value(cval, cval->control << 8, val); 2030 return 1; 2031 } 2032 return 0; 2033 } 2034 2035 /* alsa control interface for selector unit */ 2036 static const struct snd_kcontrol_new mixer_selectunit_ctl = { 2037 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 2038 .name = "", /* will be filled later */ 2039 .info = mixer_ctl_selector_info, 2040 .get = mixer_ctl_selector_get, 2041 .put = mixer_ctl_selector_put, 2042 }; 2043 2044 /* 2045 * private free callback. 2046 * free both private_data and private_value 2047 */ 2048 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) 2049 { 2050 int i, num_ins = 0; 2051 2052 if (kctl->private_data) { 2053 struct usb_mixer_elem_info *cval = kctl->private_data; 2054 num_ins = cval->max; 2055 kfree(cval); 2056 kctl->private_data = NULL; 2057 } 2058 if (kctl->private_value) { 2059 char **itemlist = (char **)kctl->private_value; 2060 for (i = 0; i < num_ins; i++) 2061 kfree(itemlist[i]); 2062 kfree(itemlist); 2063 kctl->private_value = 0; 2064 } 2065 } 2066 2067 /* 2068 * parse a selector unit 2069 */ 2070 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, 2071 void *raw_desc) 2072 { 2073 struct uac_selector_unit_descriptor *desc = raw_desc; 2074 unsigned int i, nameid, len; 2075 int err; 2076 struct usb_mixer_elem_info *cval; 2077 struct snd_kcontrol *kctl; 2078 const struct usbmix_name_map *map; 2079 char **namelist; 2080 2081 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) { 2082 usb_audio_err(state->chip, 2083 "invalid SELECTOR UNIT descriptor %d\n", unitid); 2084 return -EINVAL; 2085 } 2086 2087 for (i = 0; i < desc->bNrInPins; i++) { 2088 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 2089 return err; 2090 } 2091 2092 if (desc->bNrInPins == 1) /* only one ? nonsense! */ 2093 return 0; 2094 2095 map = find_map(state, unitid, 0); 2096 if (check_ignored_ctl(map)) 2097 return 0; 2098 2099 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 2100 if (!cval) 2101 return -ENOMEM; 2102 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 2103 cval->val_type = USB_MIXER_U8; 2104 cval->channels = 1; 2105 cval->min = 1; 2106 cval->max = desc->bNrInPins; 2107 cval->res = 1; 2108 cval->initialized = 1; 2109 2110 if (state->mixer->protocol == UAC_VERSION_1) 2111 cval->control = 0; 2112 else /* UAC_VERSION_2 */ 2113 cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ? 2114 UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR; 2115 2116 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL); 2117 if (!namelist) { 2118 kfree(cval); 2119 return -ENOMEM; 2120 } 2121 #define MAX_ITEM_NAME_LEN 64 2122 for (i = 0; i < desc->bNrInPins; i++) { 2123 struct usb_audio_term iterm; 2124 len = 0; 2125 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); 2126 if (!namelist[i]) { 2127 while (i--) 2128 kfree(namelist[i]); 2129 kfree(namelist); 2130 kfree(cval); 2131 return -ENOMEM; 2132 } 2133 len = check_mapped_selector_name(state, unitid, i, namelist[i], 2134 MAX_ITEM_NAME_LEN); 2135 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0) 2136 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0); 2137 if (! len) 2138 sprintf(namelist[i], "Input %u", i); 2139 } 2140 2141 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); 2142 if (! kctl) { 2143 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 2144 kfree(namelist); 2145 kfree(cval); 2146 return -ENOMEM; 2147 } 2148 kctl->private_value = (unsigned long)namelist; 2149 kctl->private_free = usb_mixer_selector_elem_free; 2150 2151 nameid = uac_selector_unit_iSelector(desc); 2152 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 2153 if (len) 2154 ; 2155 else if (nameid) 2156 snd_usb_copy_string_desc(state, nameid, kctl->id.name, 2157 sizeof(kctl->id.name)); 2158 else { 2159 len = get_term_name(state, &state->oterm, 2160 kctl->id.name, sizeof(kctl->id.name), 0); 2161 if (!len) 2162 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name)); 2163 2164 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) 2165 append_ctl_name(kctl, " Clock Source"); 2166 else if ((state->oterm.type & 0xff00) == 0x0100) 2167 append_ctl_name(kctl, " Capture Source"); 2168 else 2169 append_ctl_name(kctl, " Playback Source"); 2170 } 2171 2172 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n", 2173 cval->head.id, kctl->id.name, desc->bNrInPins); 2174 return snd_usb_mixer_add_control(&cval->head, kctl); 2175 } 2176 2177 /* 2178 * parse an audio unit recursively 2179 */ 2180 2181 static int parse_audio_unit(struct mixer_build *state, int unitid) 2182 { 2183 unsigned char *p1; 2184 2185 if (test_and_set_bit(unitid, state->unitbitmap)) 2186 return 0; /* the unit already visited */ 2187 2188 p1 = find_audio_control_unit(state, unitid); 2189 if (!p1) { 2190 usb_audio_err(state->chip, "unit %d not found!\n", unitid); 2191 return -EINVAL; 2192 } 2193 2194 switch (p1[2]) { 2195 case UAC_INPUT_TERMINAL: 2196 return 0; /* NOP */ 2197 case UAC_MIXER_UNIT: 2198 return parse_audio_mixer_unit(state, unitid, p1); 2199 case UAC2_CLOCK_SOURCE: 2200 return parse_clock_source_unit(state, unitid, p1); 2201 case UAC_SELECTOR_UNIT: 2202 case UAC2_CLOCK_SELECTOR: 2203 return parse_audio_selector_unit(state, unitid, p1); 2204 case UAC_FEATURE_UNIT: 2205 return parse_audio_feature_unit(state, unitid, p1); 2206 case UAC1_PROCESSING_UNIT: 2207 /* UAC2_EFFECT_UNIT has the same value */ 2208 if (state->mixer->protocol == UAC_VERSION_1) 2209 return parse_audio_processing_unit(state, unitid, p1); 2210 else 2211 return 0; /* FIXME - effect units not implemented yet */ 2212 case UAC1_EXTENSION_UNIT: 2213 /* UAC2_PROCESSING_UNIT_V2 has the same value */ 2214 if (state->mixer->protocol == UAC_VERSION_1) 2215 return parse_audio_extension_unit(state, unitid, p1); 2216 else /* UAC_VERSION_2 */ 2217 return parse_audio_processing_unit(state, unitid, p1); 2218 case UAC2_EXTENSION_UNIT_V2: 2219 return parse_audio_extension_unit(state, unitid, p1); 2220 default: 2221 usb_audio_err(state->chip, 2222 "unit %u: unexpected type 0x%02x\n", unitid, p1[2]); 2223 return -EINVAL; 2224 } 2225 } 2226 2227 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer) 2228 { 2229 kfree(mixer->id_elems); 2230 if (mixer->urb) { 2231 kfree(mixer->urb->transfer_buffer); 2232 usb_free_urb(mixer->urb); 2233 } 2234 usb_free_urb(mixer->rc_urb); 2235 kfree(mixer->rc_setup_packet); 2236 kfree(mixer); 2237 } 2238 2239 static int snd_usb_mixer_dev_free(struct snd_device *device) 2240 { 2241 struct usb_mixer_interface *mixer = device->device_data; 2242 snd_usb_mixer_free(mixer); 2243 return 0; 2244 } 2245 2246 /* 2247 * create mixer controls 2248 * 2249 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers 2250 */ 2251 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) 2252 { 2253 struct mixer_build state; 2254 int err; 2255 const struct usbmix_ctl_map *map; 2256 void *p; 2257 2258 memset(&state, 0, sizeof(state)); 2259 state.chip = mixer->chip; 2260 state.mixer = mixer; 2261 state.buffer = mixer->hostif->extra; 2262 state.buflen = mixer->hostif->extralen; 2263 2264 /* check the mapping table */ 2265 for (map = usbmix_ctl_maps; map->id; map++) { 2266 if (map->id == state.chip->usb_id) { 2267 state.map = map->map; 2268 state.selector_map = map->selector_map; 2269 mixer->ignore_ctl_error = map->ignore_ctl_error; 2270 break; 2271 } 2272 } 2273 2274 p = NULL; 2275 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, 2276 mixer->hostif->extralen, 2277 p, UAC_OUTPUT_TERMINAL)) != NULL) { 2278 if (mixer->protocol == UAC_VERSION_1) { 2279 struct uac1_output_terminal_descriptor *desc = p; 2280 2281 if (desc->bLength < sizeof(*desc)) 2282 continue; /* invalid descriptor? */ 2283 /* mark terminal ID as visited */ 2284 set_bit(desc->bTerminalID, state.unitbitmap); 2285 state.oterm.id = desc->bTerminalID; 2286 state.oterm.type = le16_to_cpu(desc->wTerminalType); 2287 state.oterm.name = desc->iTerminal; 2288 err = parse_audio_unit(&state, desc->bSourceID); 2289 if (err < 0 && err != -EINVAL) 2290 return err; 2291 } else { /* UAC_VERSION_2 */ 2292 struct uac2_output_terminal_descriptor *desc = p; 2293 2294 if (desc->bLength < sizeof(*desc)) 2295 continue; /* invalid descriptor? */ 2296 /* mark terminal ID as visited */ 2297 set_bit(desc->bTerminalID, state.unitbitmap); 2298 state.oterm.id = desc->bTerminalID; 2299 state.oterm.type = le16_to_cpu(desc->wTerminalType); 2300 state.oterm.name = desc->iTerminal; 2301 err = parse_audio_unit(&state, desc->bSourceID); 2302 if (err < 0 && err != -EINVAL) 2303 return err; 2304 2305 /* 2306 * For UAC2, use the same approach to also add the 2307 * clock selectors 2308 */ 2309 err = parse_audio_unit(&state, desc->bCSourceID); 2310 if (err < 0 && err != -EINVAL) 2311 return err; 2312 } 2313 } 2314 2315 return 0; 2316 } 2317 2318 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) 2319 { 2320 struct usb_mixer_elem_list *list; 2321 2322 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) 2323 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 2324 &list->kctl->id); 2325 } 2326 2327 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer, 2328 struct usb_mixer_elem_list *list) 2329 { 2330 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list; 2331 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN", 2332 "S8", "U8", "S16", "U16"}; 2333 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, " 2334 "channels=%i, type=\"%s\"\n", cval->head.id, 2335 cval->control, cval->cmask, cval->channels, 2336 val_types[cval->val_type]); 2337 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n", 2338 cval->min, cval->max, cval->dBmin, cval->dBmax); 2339 } 2340 2341 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, 2342 struct snd_info_buffer *buffer) 2343 { 2344 struct snd_usb_audio *chip = entry->private_data; 2345 struct usb_mixer_interface *mixer; 2346 struct usb_mixer_elem_list *list; 2347 int unitid; 2348 2349 list_for_each_entry(mixer, &chip->mixer_list, list) { 2350 snd_iprintf(buffer, 2351 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n", 2352 chip->usb_id, snd_usb_ctrl_intf(chip), 2353 mixer->ignore_ctl_error); 2354 snd_iprintf(buffer, "Card: %s\n", chip->card->longname); 2355 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { 2356 for (list = mixer->id_elems[unitid]; list; 2357 list = list->next_id_elem) { 2358 snd_iprintf(buffer, " Unit: %i\n", list->id); 2359 if (list->kctl) 2360 snd_iprintf(buffer, 2361 " Control: name=\"%s\", index=%i\n", 2362 list->kctl->id.name, 2363 list->kctl->id.index); 2364 if (list->dump) 2365 list->dump(buffer, list); 2366 } 2367 } 2368 } 2369 } 2370 2371 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer, 2372 int attribute, int value, int index) 2373 { 2374 struct usb_mixer_elem_list *list; 2375 __u8 unitid = (index >> 8) & 0xff; 2376 __u8 control = (value >> 8) & 0xff; 2377 __u8 channel = value & 0xff; 2378 unsigned int count = 0; 2379 2380 if (channel >= MAX_CHANNELS) { 2381 usb_audio_dbg(mixer->chip, 2382 "%s(): bogus channel number %d\n", 2383 __func__, channel); 2384 return; 2385 } 2386 2387 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) 2388 count++; 2389 2390 if (count == 0) 2391 return; 2392 2393 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) { 2394 struct usb_mixer_elem_info *info; 2395 2396 if (!list->kctl) 2397 continue; 2398 2399 info = (struct usb_mixer_elem_info *)list; 2400 if (count > 1 && info->control != control) 2401 continue; 2402 2403 switch (attribute) { 2404 case UAC2_CS_CUR: 2405 /* invalidate cache, so the value is read from the device */ 2406 if (channel) 2407 info->cached &= ~(1 << channel); 2408 else /* master channel */ 2409 info->cached = 0; 2410 2411 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 2412 &info->head.kctl->id); 2413 break; 2414 2415 case UAC2_CS_RANGE: 2416 /* TODO */ 2417 break; 2418 2419 case UAC2_CS_MEM: 2420 /* TODO */ 2421 break; 2422 2423 default: 2424 usb_audio_dbg(mixer->chip, 2425 "unknown attribute %d in interrupt\n", 2426 attribute); 2427 break; 2428 } /* switch */ 2429 } 2430 } 2431 2432 static void snd_usb_mixer_interrupt(struct urb *urb) 2433 { 2434 struct usb_mixer_interface *mixer = urb->context; 2435 int len = urb->actual_length; 2436 int ustatus = urb->status; 2437 2438 if (ustatus != 0) 2439 goto requeue; 2440 2441 if (mixer->protocol == UAC_VERSION_1) { 2442 struct uac1_status_word *status; 2443 2444 for (status = urb->transfer_buffer; 2445 len >= sizeof(*status); 2446 len -= sizeof(*status), status++) { 2447 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n", 2448 status->bStatusType, 2449 status->bOriginator); 2450 2451 /* ignore any notifications not from the control interface */ 2452 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) != 2453 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF) 2454 continue; 2455 2456 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED) 2457 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator); 2458 else 2459 snd_usb_mixer_notify_id(mixer, status->bOriginator); 2460 } 2461 } else { /* UAC_VERSION_2 */ 2462 struct uac2_interrupt_data_msg *msg; 2463 2464 for (msg = urb->transfer_buffer; 2465 len >= sizeof(*msg); 2466 len -= sizeof(*msg), msg++) { 2467 /* drop vendor specific and endpoint requests */ 2468 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) || 2469 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP)) 2470 continue; 2471 2472 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute, 2473 le16_to_cpu(msg->wValue), 2474 le16_to_cpu(msg->wIndex)); 2475 } 2476 } 2477 2478 requeue: 2479 if (ustatus != -ENOENT && 2480 ustatus != -ECONNRESET && 2481 ustatus != -ESHUTDOWN) { 2482 urb->dev = mixer->chip->dev; 2483 usb_submit_urb(urb, GFP_ATOMIC); 2484 } 2485 } 2486 2487 /* create the handler for the optional status interrupt endpoint */ 2488 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer) 2489 { 2490 struct usb_endpoint_descriptor *ep; 2491 void *transfer_buffer; 2492 int buffer_length; 2493 unsigned int epnum; 2494 2495 /* we need one interrupt input endpoint */ 2496 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1) 2497 return 0; 2498 ep = get_endpoint(mixer->hostif, 0); 2499 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep)) 2500 return 0; 2501 2502 epnum = usb_endpoint_num(ep); 2503 buffer_length = le16_to_cpu(ep->wMaxPacketSize); 2504 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL); 2505 if (!transfer_buffer) 2506 return -ENOMEM; 2507 mixer->urb = usb_alloc_urb(0, GFP_KERNEL); 2508 if (!mixer->urb) { 2509 kfree(transfer_buffer); 2510 return -ENOMEM; 2511 } 2512 usb_fill_int_urb(mixer->urb, mixer->chip->dev, 2513 usb_rcvintpipe(mixer->chip->dev, epnum), 2514 transfer_buffer, buffer_length, 2515 snd_usb_mixer_interrupt, mixer, ep->bInterval); 2516 usb_submit_urb(mixer->urb, GFP_KERNEL); 2517 return 0; 2518 } 2519 2520 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, 2521 int ignore_error) 2522 { 2523 static struct snd_device_ops dev_ops = { 2524 .dev_free = snd_usb_mixer_dev_free 2525 }; 2526 struct usb_mixer_interface *mixer; 2527 struct snd_info_entry *entry; 2528 int err; 2529 2530 strcpy(chip->card->mixername, "USB Mixer"); 2531 2532 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL); 2533 if (!mixer) 2534 return -ENOMEM; 2535 mixer->chip = chip; 2536 mixer->ignore_ctl_error = ignore_error; 2537 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems), 2538 GFP_KERNEL); 2539 if (!mixer->id_elems) { 2540 kfree(mixer); 2541 return -ENOMEM; 2542 } 2543 2544 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0]; 2545 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) { 2546 case UAC_VERSION_1: 2547 default: 2548 mixer->protocol = UAC_VERSION_1; 2549 break; 2550 case UAC_VERSION_2: 2551 mixer->protocol = UAC_VERSION_2; 2552 break; 2553 } 2554 2555 if ((err = snd_usb_mixer_controls(mixer)) < 0 || 2556 (err = snd_usb_mixer_status_create(mixer)) < 0) 2557 goto _error; 2558 2559 snd_usb_mixer_apply_create_quirk(mixer); 2560 2561 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops); 2562 if (err < 0) 2563 goto _error; 2564 2565 if (list_empty(&chip->mixer_list) && 2566 !snd_card_proc_new(chip->card, "usbmixer", &entry)) 2567 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read); 2568 2569 list_add(&mixer->list, &chip->mixer_list); 2570 return 0; 2571 2572 _error: 2573 snd_usb_mixer_free(mixer); 2574 return err; 2575 } 2576 2577 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer) 2578 { 2579 usb_kill_urb(mixer->urb); 2580 usb_kill_urb(mixer->rc_urb); 2581 } 2582 2583 #ifdef CONFIG_PM 2584 /* stop any bus activity of a mixer */ 2585 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer) 2586 { 2587 usb_kill_urb(mixer->urb); 2588 usb_kill_urb(mixer->rc_urb); 2589 } 2590 2591 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer) 2592 { 2593 int err; 2594 2595 if (mixer->urb) { 2596 err = usb_submit_urb(mixer->urb, GFP_NOIO); 2597 if (err < 0) 2598 return err; 2599 } 2600 2601 return 0; 2602 } 2603 2604 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer) 2605 { 2606 snd_usb_mixer_inactivate(mixer); 2607 return 0; 2608 } 2609 2610 static int restore_mixer_value(struct usb_mixer_elem_list *list) 2611 { 2612 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list; 2613 int c, err, idx; 2614 2615 if (cval->cmask) { 2616 idx = 0; 2617 for (c = 0; c < MAX_CHANNELS; c++) { 2618 if (!(cval->cmask & (1 << c))) 2619 continue; 2620 if (cval->cached & (1 << (c + 1))) { 2621 err = snd_usb_set_cur_mix_value(cval, c + 1, idx, 2622 cval->cache_val[idx]); 2623 if (err < 0) 2624 return err; 2625 } 2626 idx++; 2627 } 2628 } else { 2629 /* master */ 2630 if (cval->cached) { 2631 err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val); 2632 if (err < 0) 2633 return err; 2634 } 2635 } 2636 2637 return 0; 2638 } 2639 2640 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume) 2641 { 2642 struct usb_mixer_elem_list *list; 2643 int id, err; 2644 2645 if (reset_resume) { 2646 /* restore cached mixer values */ 2647 for (id = 0; id < MAX_ID_ELEMS; id++) { 2648 for (list = mixer->id_elems[id]; list; 2649 list = list->next_id_elem) { 2650 if (list->resume) { 2651 err = list->resume(list); 2652 if (err < 0) 2653 return err; 2654 } 2655 } 2656 } 2657 } 2658 2659 return snd_usb_mixer_activate(mixer); 2660 } 2661 #endif 2662 2663 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, 2664 struct usb_mixer_interface *mixer, 2665 int unitid) 2666 { 2667 list->mixer = mixer; 2668 list->id = unitid; 2669 list->dump = snd_usb_mixer_dump_cval; 2670 #ifdef CONFIG_PM 2671 list->resume = restore_mixer_value; 2672 #endif 2673 } 2674