1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * (Tentative) USB Audio Driver for ALSA 4 * 5 * Mixer control part 6 * 7 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> 8 * 9 * Many codes borrowed from audio.c by 10 * Alan Cox (alan@lxorguk.ukuu.org.uk) 11 * Thomas Sailer (sailer@ife.ee.ethz.ch) 12 */ 13 14 /* 15 * TODOs, for both the mixer and the streaming interfaces: 16 * 17 * - support for UAC2 effect units 18 * - support for graphical equalizers 19 * - RANGE and MEM set commands (UAC2) 20 * - RANGE and MEM interrupt dispatchers (UAC2) 21 * - audio channel clustering (UAC2) 22 * - audio sample rate converter units (UAC2) 23 * - proper handling of clock multipliers (UAC2) 24 * - dispatch clock change notifications (UAC2) 25 * - stop PCM streams which use a clock that became invalid 26 * - stop PCM streams which use a clock selector that has changed 27 * - parse available sample rates again when clock sources changed 28 */ 29 30 #include <linux/bitops.h> 31 #include <linux/init.h> 32 #include <linux/list.h> 33 #include <linux/log2.h> 34 #include <linux/slab.h> 35 #include <linux/string.h> 36 #include <linux/usb.h> 37 #include <linux/usb/audio.h> 38 #include <linux/usb/audio-v2.h> 39 #include <linux/usb/audio-v3.h> 40 41 #include <sound/core.h> 42 #include <sound/control.h> 43 #include <sound/hwdep.h> 44 #include <sound/info.h> 45 #include <sound/tlv.h> 46 47 #include "usbaudio.h" 48 #include "mixer.h" 49 #include "helper.h" 50 #include "mixer_quirks.h" 51 #include "power.h" 52 53 #define MAX_ID_ELEMS 256 54 55 struct usb_audio_term { 56 int id; 57 int type; 58 int channels; 59 unsigned int chconfig; 60 int name; 61 }; 62 63 struct usbmix_name_map; 64 65 struct mixer_build { 66 struct snd_usb_audio *chip; 67 struct usb_mixer_interface *mixer; 68 unsigned char *buffer; 69 unsigned int buflen; 70 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS); 71 DECLARE_BITMAP(termbitmap, MAX_ID_ELEMS); 72 struct usb_audio_term oterm; 73 const struct usbmix_name_map *map; 74 const struct usbmix_selector_map *selector_map; 75 }; 76 77 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/ 78 enum { 79 USB_XU_CLOCK_RATE = 0xe301, 80 USB_XU_CLOCK_SOURCE = 0xe302, 81 USB_XU_DIGITAL_IO_STATUS = 0xe303, 82 USB_XU_DEVICE_OPTIONS = 0xe304, 83 USB_XU_DIRECT_MONITORING = 0xe305, 84 USB_XU_METERING = 0xe306 85 }; 86 enum { 87 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/ 88 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */ 89 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */ 90 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */ 91 }; 92 93 /* 94 * manual mapping of mixer names 95 * if the mixer topology is too complicated and the parsed names are 96 * ambiguous, add the entries in usbmixer_maps.c. 97 */ 98 #include "mixer_maps.c" 99 100 static const struct usbmix_name_map * 101 find_map(const struct usbmix_name_map *p, int unitid, int control) 102 { 103 if (!p) 104 return NULL; 105 106 for (; p->id; p++) { 107 if (p->id == unitid && 108 (!control || !p->control || control == p->control)) 109 return p; 110 } 111 return NULL; 112 } 113 114 /* get the mapped name if the unit matches */ 115 static int 116 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen) 117 { 118 int len; 119 120 if (!p || !p->name) 121 return 0; 122 123 buflen--; 124 len = strscpy(buf, p->name, buflen); 125 return len < 0 ? buflen : len; 126 } 127 128 /* ignore the error value if ignore_ctl_error flag is set */ 129 #define filter_error(cval, err) \ 130 ((cval)->head.mixer->ignore_ctl_error ? 0 : (err)) 131 132 /* check whether the control should be ignored */ 133 static inline int 134 check_ignored_ctl(const struct usbmix_name_map *p) 135 { 136 if (!p || p->name || p->dB) 137 return 0; 138 return 1; 139 } 140 141 /* dB mapping */ 142 static inline void check_mapped_dB(const struct usbmix_name_map *p, 143 struct usb_mixer_elem_info *cval) 144 { 145 if (p && p->dB) { 146 cval->dBmin = p->dB->min; 147 cval->dBmax = p->dB->max; 148 cval->min_mute = p->dB->min_mute; 149 cval->initialized = 1; 150 } 151 } 152 153 /* get the mapped selector source name */ 154 static int check_mapped_selector_name(struct mixer_build *state, int unitid, 155 int index, char *buf, int buflen) 156 { 157 const struct usbmix_selector_map *p; 158 int len; 159 160 if (!state->selector_map) 161 return 0; 162 for (p = state->selector_map; p->id; p++) { 163 if (p->id == unitid && index < p->count) { 164 len = strscpy(buf, p->names[index], buflen); 165 return len < 0 ? buflen : len; 166 } 167 } 168 return 0; 169 } 170 171 /* 172 * find an audio control unit with the given unit id 173 */ 174 static void *find_audio_control_unit(struct mixer_build *state, 175 unsigned char unit) 176 { 177 /* we just parse the header */ 178 struct uac_feature_unit_descriptor *hdr = NULL; 179 180 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr, 181 USB_DT_CS_INTERFACE)) != NULL) { 182 if (hdr->bLength >= 4 && 183 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL && 184 hdr->bDescriptorSubtype <= UAC3_SAMPLE_RATE_CONVERTER && 185 hdr->bUnitID == unit) 186 return hdr; 187 } 188 189 return NULL; 190 } 191 192 /* 193 * copy a string with the given id 194 */ 195 static int snd_usb_copy_string_desc(struct snd_usb_audio *chip, 196 int index, char *buf, int maxlen) 197 { 198 int len = usb_string(chip->dev, index, buf, maxlen - 1); 199 200 if (len < 0) 201 return 0; 202 203 buf[len] = 0; 204 return len; 205 } 206 207 /* 208 * convert from the byte/word on usb descriptor to the zero-based integer 209 */ 210 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val) 211 { 212 switch (cval->val_type) { 213 case USB_MIXER_BOOLEAN: 214 return !!val; 215 case USB_MIXER_INV_BOOLEAN: 216 return !val; 217 case USB_MIXER_U8: 218 val &= 0xff; 219 break; 220 case USB_MIXER_S8: 221 val &= 0xff; 222 if (val >= 0x80) 223 val -= 0x100; 224 break; 225 case USB_MIXER_U16: 226 val &= 0xffff; 227 break; 228 case USB_MIXER_S16: 229 val &= 0xffff; 230 if (val >= 0x8000) 231 val -= 0x10000; 232 break; 233 } 234 return val; 235 } 236 237 /* 238 * convert from the zero-based int to the byte/word for usb descriptor 239 */ 240 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val) 241 { 242 switch (cval->val_type) { 243 case USB_MIXER_BOOLEAN: 244 return !!val; 245 case USB_MIXER_INV_BOOLEAN: 246 return !val; 247 case USB_MIXER_S8: 248 case USB_MIXER_U8: 249 return val & 0xff; 250 case USB_MIXER_S16: 251 case USB_MIXER_U16: 252 return val & 0xffff; 253 } 254 return 0; /* not reached */ 255 } 256 257 static int get_relative_value(struct usb_mixer_elem_info *cval, int val) 258 { 259 if (!cval->res) 260 cval->res = 1; 261 if (val < cval->min) 262 return 0; 263 else if (val >= cval->max) 264 return DIV_ROUND_UP(cval->max - cval->min, cval->res); 265 else 266 return (val - cval->min) / cval->res; 267 } 268 269 static int get_abs_value(struct usb_mixer_elem_info *cval, int val) 270 { 271 if (val < 0) 272 return cval->min; 273 if (!cval->res) 274 cval->res = 1; 275 val *= cval->res; 276 val += cval->min; 277 if (val > cval->max) 278 return cval->max; 279 return val; 280 } 281 282 static int uac2_ctl_value_size(int val_type) 283 { 284 switch (val_type) { 285 case USB_MIXER_S32: 286 case USB_MIXER_U32: 287 return 4; 288 case USB_MIXER_S16: 289 case USB_MIXER_U16: 290 return 2; 291 default: 292 return 1; 293 } 294 return 0; /* unreachable */ 295 } 296 297 298 /* 299 * retrieve a mixer value 300 */ 301 302 static inline int mixer_ctrl_intf(struct usb_mixer_interface *mixer) 303 { 304 return get_iface_desc(mixer->hostif)->bInterfaceNumber; 305 } 306 307 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, 308 int validx, int *value_ret) 309 { 310 struct snd_usb_audio *chip = cval->head.mixer->chip; 311 unsigned char buf[2]; 312 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 313 int timeout = 10; 314 int idx = 0, err; 315 316 err = snd_usb_lock_shutdown(chip); 317 if (err < 0) 318 return -EIO; 319 320 while (timeout-- > 0) { 321 idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8); 322 err = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request, 323 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 324 validx, idx, buf, val_len); 325 if (err >= val_len) { 326 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); 327 err = 0; 328 goto out; 329 } else if (err == -ETIMEDOUT) { 330 goto out; 331 } 332 } 333 usb_audio_dbg(chip, 334 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 335 request, validx, idx, cval->val_type); 336 err = -EINVAL; 337 338 out: 339 snd_usb_unlock_shutdown(chip); 340 return err; 341 } 342 343 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, 344 int validx, int *value_ret) 345 { 346 struct snd_usb_audio *chip = cval->head.mixer->chip; 347 /* enough space for one range */ 348 unsigned char buf[sizeof(__u16) + 3 * sizeof(__u32)]; 349 unsigned char *val; 350 int idx = 0, ret, val_size, size; 351 __u8 bRequest; 352 353 val_size = uac2_ctl_value_size(cval->val_type); 354 355 if (request == UAC_GET_CUR) { 356 bRequest = UAC2_CS_CUR; 357 size = val_size; 358 } else { 359 bRequest = UAC2_CS_RANGE; 360 size = sizeof(__u16) + 3 * val_size; 361 } 362 363 memset(buf, 0, sizeof(buf)); 364 365 if (snd_usb_lock_shutdown(chip)) 366 return -EIO; 367 368 idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8); 369 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest, 370 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 371 validx, idx, buf, size); 372 snd_usb_unlock_shutdown(chip); 373 374 if (ret < 0) { 375 usb_audio_dbg(chip, 376 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 377 request, validx, idx, cval->val_type); 378 return ret; 379 } 380 381 /* FIXME: how should we handle multiple triplets here? */ 382 383 switch (request) { 384 case UAC_GET_CUR: 385 val = buf; 386 break; 387 case UAC_GET_MIN: 388 val = buf + sizeof(__u16); 389 break; 390 case UAC_GET_MAX: 391 val = buf + sizeof(__u16) + val_size; 392 break; 393 case UAC_GET_RES: 394 val = buf + sizeof(__u16) + val_size * 2; 395 break; 396 default: 397 return -EINVAL; 398 } 399 400 *value_ret = convert_signed_value(cval, 401 snd_usb_combine_bytes(val, val_size)); 402 403 return 0; 404 } 405 406 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, 407 int validx, int *value_ret) 408 { 409 validx += cval->idx_off; 410 411 return (cval->head.mixer->protocol == UAC_VERSION_1) ? 412 get_ctl_value_v1(cval, request, validx, value_ret) : 413 get_ctl_value_v2(cval, request, validx, value_ret); 414 } 415 416 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, 417 int validx, int *value) 418 { 419 return get_ctl_value(cval, UAC_GET_CUR, validx, value); 420 } 421 422 /* channel = 0: master, 1 = first channel */ 423 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval, 424 int channel, int *value) 425 { 426 return get_ctl_value(cval, UAC_GET_CUR, 427 (cval->control << 8) | channel, 428 value); 429 } 430 431 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, 432 int channel, int index, int *value) 433 { 434 int err; 435 436 if (cval->cached & (1 << channel)) { 437 *value = cval->cache_val[index]; 438 return 0; 439 } 440 err = get_cur_mix_raw(cval, channel, value); 441 if (err < 0) { 442 if (!cval->head.mixer->ignore_ctl_error) 443 usb_audio_dbg(cval->head.mixer->chip, 444 "cannot get current value for control %d ch %d: err = %d\n", 445 cval->control, channel, err); 446 return err; 447 } 448 cval->cached |= 1 << channel; 449 cval->cache_val[index] = *value; 450 return 0; 451 } 452 453 /* 454 * set a mixer value 455 */ 456 457 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, 458 int request, int validx, int value_set) 459 { 460 struct snd_usb_audio *chip = cval->head.mixer->chip; 461 unsigned char buf[4]; 462 int idx = 0, val_len, err, timeout = 10; 463 464 validx += cval->idx_off; 465 466 467 if (cval->head.mixer->protocol == UAC_VERSION_1) { 468 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 469 } else { /* UAC_VERSION_2/3 */ 470 val_len = uac2_ctl_value_size(cval->val_type); 471 472 /* FIXME */ 473 if (request != UAC_SET_CUR) { 474 usb_audio_dbg(chip, "RANGE setting not yet supported\n"); 475 return -EINVAL; 476 } 477 478 request = UAC2_CS_CUR; 479 } 480 481 value_set = convert_bytes_value(cval, value_set); 482 buf[0] = value_set & 0xff; 483 buf[1] = (value_set >> 8) & 0xff; 484 buf[2] = (value_set >> 16) & 0xff; 485 buf[3] = (value_set >> 24) & 0xff; 486 487 err = snd_usb_lock_shutdown(chip); 488 if (err < 0) 489 return -EIO; 490 491 while (timeout-- > 0) { 492 idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8); 493 err = snd_usb_ctl_msg(chip->dev, 494 usb_sndctrlpipe(chip->dev, 0), request, 495 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, 496 validx, idx, buf, val_len); 497 if (err >= 0) { 498 err = 0; 499 goto out; 500 } else if (err == -ETIMEDOUT) { 501 goto out; 502 } 503 } 504 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", 505 request, validx, idx, cval->val_type, buf[0], buf[1]); 506 err = -EINVAL; 507 508 out: 509 snd_usb_unlock_shutdown(chip); 510 return err; 511 } 512 513 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, 514 int validx, int value) 515 { 516 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value); 517 } 518 519 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, 520 int index, int value) 521 { 522 int err; 523 unsigned int read_only = (channel == 0) ? 524 cval->master_readonly : 525 cval->ch_readonly & (1 << (channel - 1)); 526 527 if (read_only) { 528 usb_audio_dbg(cval->head.mixer->chip, 529 "%s(): channel %d of control %d is read_only\n", 530 __func__, channel, cval->control); 531 return 0; 532 } 533 534 err = snd_usb_mixer_set_ctl_value(cval, 535 UAC_SET_CUR, (cval->control << 8) | channel, 536 value); 537 if (err < 0) 538 return err; 539 cval->cached |= 1 << channel; 540 cval->cache_val[index] = value; 541 return 0; 542 } 543 544 /* 545 * TLV callback for mixer volume controls 546 */ 547 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, 548 unsigned int size, unsigned int __user *_tlv) 549 { 550 struct usb_mixer_elem_info *cval = kcontrol->private_data; 551 DECLARE_TLV_DB_MINMAX(scale, 0, 0); 552 553 if (size < sizeof(scale)) 554 return -ENOMEM; 555 if (cval->min_mute) 556 scale[0] = SNDRV_CTL_TLVT_DB_MINMAX_MUTE; 557 scale[2] = cval->dBmin; 558 scale[3] = cval->dBmax; 559 if (copy_to_user(_tlv, scale, sizeof(scale))) 560 return -EFAULT; 561 return 0; 562 } 563 564 /* 565 * parser routines begin here... 566 */ 567 568 static int parse_audio_unit(struct mixer_build *state, int unitid); 569 570 571 /* 572 * check if the input/output channel routing is enabled on the given bitmap. 573 * used for mixer unit parser 574 */ 575 static int check_matrix_bitmap(unsigned char *bmap, 576 int ich, int och, int num_outs) 577 { 578 int idx = ich * num_outs + och; 579 return bmap[idx >> 3] & (0x80 >> (idx & 7)); 580 } 581 582 /* 583 * add an alsa control element 584 * search and increment the index until an empty slot is found. 585 * 586 * if failed, give up and free the control instance. 587 */ 588 589 int snd_usb_mixer_add_list(struct usb_mixer_elem_list *list, 590 struct snd_kcontrol *kctl, 591 bool is_std_info) 592 { 593 struct usb_mixer_interface *mixer = list->mixer; 594 int err; 595 596 while (snd_ctl_find_id(mixer->chip->card, &kctl->id)) 597 kctl->id.index++; 598 err = snd_ctl_add(mixer->chip->card, kctl); 599 if (err < 0) { 600 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n", 601 err); 602 return err; 603 } 604 list->kctl = kctl; 605 list->is_std_info = is_std_info; 606 list->next_id_elem = mixer->id_elems[list->id]; 607 mixer->id_elems[list->id] = list; 608 return 0; 609 } 610 611 /* 612 * get a terminal name string 613 */ 614 615 static struct iterm_name_combo { 616 int type; 617 char *name; 618 } iterm_names[] = { 619 { 0x0300, "Output" }, 620 { 0x0301, "Speaker" }, 621 { 0x0302, "Headphone" }, 622 { 0x0303, "HMD Audio" }, 623 { 0x0304, "Desktop Speaker" }, 624 { 0x0305, "Room Speaker" }, 625 { 0x0306, "Com Speaker" }, 626 { 0x0307, "LFE" }, 627 { 0x0600, "External In" }, 628 { 0x0601, "Analog In" }, 629 { 0x0602, "Digital In" }, 630 { 0x0603, "Line" }, 631 { 0x0604, "Legacy In" }, 632 { 0x0605, "IEC958 In" }, 633 { 0x0606, "1394 DA Stream" }, 634 { 0x0607, "1394 DV Stream" }, 635 { 0x0700, "Embedded" }, 636 { 0x0701, "Noise Source" }, 637 { 0x0702, "Equalization Noise" }, 638 { 0x0703, "CD" }, 639 { 0x0704, "DAT" }, 640 { 0x0705, "DCC" }, 641 { 0x0706, "MiniDisk" }, 642 { 0x0707, "Analog Tape" }, 643 { 0x0708, "Phonograph" }, 644 { 0x0709, "VCR Audio" }, 645 { 0x070a, "Video Disk Audio" }, 646 { 0x070b, "DVD Audio" }, 647 { 0x070c, "TV Tuner Audio" }, 648 { 0x070d, "Satellite Rec Audio" }, 649 { 0x070e, "Cable Tuner Audio" }, 650 { 0x070f, "DSS Audio" }, 651 { 0x0710, "Radio Receiver" }, 652 { 0x0711, "Radio Transmitter" }, 653 { 0x0712, "Multi-Track Recorder" }, 654 { 0x0713, "Synthesizer" }, 655 { 0 }, 656 }; 657 658 static int get_term_name(struct snd_usb_audio *chip, struct usb_audio_term *iterm, 659 unsigned char *name, int maxlen, int term_only) 660 { 661 struct iterm_name_combo *names; 662 int len; 663 664 if (iterm->name) { 665 len = snd_usb_copy_string_desc(chip, iterm->name, 666 name, maxlen); 667 if (len) 668 return len; 669 } 670 671 /* virtual type - not a real terminal */ 672 if (iterm->type >> 16) { 673 if (term_only) 674 return 0; 675 switch (iterm->type >> 16) { 676 case UAC3_SELECTOR_UNIT: 677 strcpy(name, "Selector"); 678 return 8; 679 case UAC3_PROCESSING_UNIT: 680 strcpy(name, "Process Unit"); 681 return 12; 682 case UAC3_EXTENSION_UNIT: 683 strcpy(name, "Ext Unit"); 684 return 8; 685 case UAC3_MIXER_UNIT: 686 strcpy(name, "Mixer"); 687 return 5; 688 default: 689 return sprintf(name, "Unit %d", iterm->id); 690 } 691 } 692 693 switch (iterm->type & 0xff00) { 694 case 0x0100: 695 strcpy(name, "PCM"); 696 return 3; 697 case 0x0200: 698 strcpy(name, "Mic"); 699 return 3; 700 case 0x0400: 701 strcpy(name, "Headset"); 702 return 7; 703 case 0x0500: 704 strcpy(name, "Phone"); 705 return 5; 706 } 707 708 for (names = iterm_names; names->type; names++) { 709 if (names->type == iterm->type) { 710 strcpy(name, names->name); 711 return strlen(names->name); 712 } 713 } 714 715 return 0; 716 } 717 718 /* 719 * Get logical cluster information for UAC3 devices. 720 */ 721 static int get_cluster_channels_v3(struct mixer_build *state, unsigned int cluster_id) 722 { 723 struct uac3_cluster_header_descriptor c_header; 724 int err; 725 726 err = snd_usb_ctl_msg(state->chip->dev, 727 usb_rcvctrlpipe(state->chip->dev, 0), 728 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR, 729 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 730 cluster_id, 731 snd_usb_ctrl_intf(state->chip), 732 &c_header, sizeof(c_header)); 733 if (err < 0) 734 goto error; 735 if (err != sizeof(c_header)) { 736 err = -EIO; 737 goto error; 738 } 739 740 return c_header.bNrChannels; 741 742 error: 743 usb_audio_err(state->chip, "cannot request logical cluster ID: %d (err: %d)\n", cluster_id, err); 744 return err; 745 } 746 747 /* 748 * Get number of channels for a Mixer Unit. 749 */ 750 static int uac_mixer_unit_get_channels(struct mixer_build *state, 751 struct uac_mixer_unit_descriptor *desc) 752 { 753 int mu_channels; 754 755 switch (state->mixer->protocol) { 756 case UAC_VERSION_1: 757 case UAC_VERSION_2: 758 default: 759 if (desc->bLength < sizeof(*desc) + desc->bNrInPins + 1) 760 return 0; /* no bmControls -> skip */ 761 mu_channels = uac_mixer_unit_bNrChannels(desc); 762 break; 763 case UAC_VERSION_3: 764 mu_channels = get_cluster_channels_v3(state, 765 uac3_mixer_unit_wClusterDescrID(desc)); 766 break; 767 } 768 769 return mu_channels; 770 } 771 772 /* 773 * Parse Input Terminal Unit 774 */ 775 static int __check_input_term(struct mixer_build *state, int id, 776 struct usb_audio_term *term); 777 778 static int parse_term_uac1_iterm_unit(struct mixer_build *state, 779 struct usb_audio_term *term, 780 void *p1, int id) 781 { 782 struct uac_input_terminal_descriptor *d = p1; 783 784 term->type = le16_to_cpu(d->wTerminalType); 785 term->channels = d->bNrChannels; 786 term->chconfig = le16_to_cpu(d->wChannelConfig); 787 term->name = d->iTerminal; 788 return 0; 789 } 790 791 static int parse_term_uac2_iterm_unit(struct mixer_build *state, 792 struct usb_audio_term *term, 793 void *p1, int id) 794 { 795 struct uac2_input_terminal_descriptor *d = p1; 796 int err; 797 798 /* call recursively to verify the referenced clock entity */ 799 err = __check_input_term(state, d->bCSourceID, term); 800 if (err < 0) 801 return err; 802 803 /* save input term properties after recursion, 804 * to ensure they are not overriden by the recursion calls 805 */ 806 term->id = id; 807 term->type = le16_to_cpu(d->wTerminalType); 808 term->channels = d->bNrChannels; 809 term->chconfig = le32_to_cpu(d->bmChannelConfig); 810 term->name = d->iTerminal; 811 return 0; 812 } 813 814 static int parse_term_uac3_iterm_unit(struct mixer_build *state, 815 struct usb_audio_term *term, 816 void *p1, int id) 817 { 818 struct uac3_input_terminal_descriptor *d = p1; 819 int err; 820 821 /* call recursively to verify the referenced clock entity */ 822 err = __check_input_term(state, d->bCSourceID, term); 823 if (err < 0) 824 return err; 825 826 /* save input term properties after recursion, 827 * to ensure they are not overriden by the recursion calls 828 */ 829 term->id = id; 830 term->type = le16_to_cpu(d->wTerminalType); 831 832 err = get_cluster_channels_v3(state, le16_to_cpu(d->wClusterDescrID)); 833 if (err < 0) 834 return err; 835 term->channels = err; 836 837 /* REVISIT: UAC3 IT doesn't have channels cfg */ 838 term->chconfig = 0; 839 840 term->name = le16_to_cpu(d->wTerminalDescrStr); 841 return 0; 842 } 843 844 static int parse_term_mixer_unit(struct mixer_build *state, 845 struct usb_audio_term *term, 846 void *p1, int id) 847 { 848 struct uac_mixer_unit_descriptor *d = p1; 849 int protocol = state->mixer->protocol; 850 int err; 851 852 err = uac_mixer_unit_get_channels(state, d); 853 if (err <= 0) 854 return err; 855 856 term->type = UAC3_MIXER_UNIT << 16; /* virtual type */ 857 term->channels = err; 858 if (protocol != UAC_VERSION_3) { 859 term->chconfig = uac_mixer_unit_wChannelConfig(d, protocol); 860 term->name = uac_mixer_unit_iMixer(d); 861 } 862 return 0; 863 } 864 865 static int parse_term_selector_unit(struct mixer_build *state, 866 struct usb_audio_term *term, 867 void *p1, int id) 868 { 869 struct uac_selector_unit_descriptor *d = p1; 870 int err; 871 872 /* call recursively to retrieve the channel info */ 873 err = __check_input_term(state, d->baSourceID[0], term); 874 if (err < 0) 875 return err; 876 term->type = UAC3_SELECTOR_UNIT << 16; /* virtual type */ 877 term->id = id; 878 if (state->mixer->protocol != UAC_VERSION_3) 879 term->name = uac_selector_unit_iSelector(d); 880 return 0; 881 } 882 883 static int parse_term_proc_unit(struct mixer_build *state, 884 struct usb_audio_term *term, 885 void *p1, int id, int vtype) 886 { 887 struct uac_processing_unit_descriptor *d = p1; 888 int protocol = state->mixer->protocol; 889 int err; 890 891 if (d->bNrInPins) { 892 /* call recursively to retrieve the channel info */ 893 err = __check_input_term(state, d->baSourceID[0], term); 894 if (err < 0) 895 return err; 896 } 897 898 term->type = vtype << 16; /* virtual type */ 899 term->id = id; 900 901 if (protocol == UAC_VERSION_3) 902 return 0; 903 904 if (!term->channels) { 905 term->channels = uac_processing_unit_bNrChannels(d); 906 term->chconfig = uac_processing_unit_wChannelConfig(d, protocol); 907 } 908 term->name = uac_processing_unit_iProcessing(d, protocol); 909 return 0; 910 } 911 912 static int parse_term_effect_unit(struct mixer_build *state, 913 struct usb_audio_term *term, 914 void *p1, int id) 915 { 916 struct uac2_effect_unit_descriptor *d = p1; 917 int err; 918 919 err = __check_input_term(state, d->bSourceID, term); 920 if (err < 0) 921 return err; 922 term->type = UAC3_EFFECT_UNIT << 16; /* virtual type */ 923 term->id = id; 924 return 0; 925 } 926 927 static int parse_term_uac2_clock_source(struct mixer_build *state, 928 struct usb_audio_term *term, 929 void *p1, int id) 930 { 931 struct uac_clock_source_descriptor *d = p1; 932 933 term->type = UAC3_CLOCK_SOURCE << 16; /* virtual type */ 934 term->id = id; 935 term->name = d->iClockSource; 936 return 0; 937 } 938 939 static int parse_term_uac3_clock_source(struct mixer_build *state, 940 struct usb_audio_term *term, 941 void *p1, int id) 942 { 943 struct uac3_clock_source_descriptor *d = p1; 944 945 term->type = UAC3_CLOCK_SOURCE << 16; /* virtual type */ 946 term->id = id; 947 term->name = le16_to_cpu(d->wClockSourceStr); 948 return 0; 949 } 950 951 #define PTYPE(a, b) ((a) << 8 | (b)) 952 953 /* 954 * parse the source unit recursively until it reaches to a terminal 955 * or a branched unit. 956 */ 957 static int __check_input_term(struct mixer_build *state, int id, 958 struct usb_audio_term *term) 959 { 960 int protocol = state->mixer->protocol; 961 void *p1; 962 unsigned char *hdr; 963 964 for (;;) { 965 /* a loop in the terminal chain? */ 966 if (test_and_set_bit(id, state->termbitmap)) 967 return -EINVAL; 968 969 p1 = find_audio_control_unit(state, id); 970 if (!p1) 971 break; 972 if (!snd_usb_validate_audio_desc(p1, protocol)) 973 break; /* bad descriptor */ 974 975 hdr = p1; 976 term->id = id; 977 978 switch (PTYPE(protocol, hdr[2])) { 979 case PTYPE(UAC_VERSION_1, UAC_FEATURE_UNIT): 980 case PTYPE(UAC_VERSION_2, UAC_FEATURE_UNIT): 981 case PTYPE(UAC_VERSION_3, UAC3_FEATURE_UNIT): { 982 /* the header is the same for all versions */ 983 struct uac_feature_unit_descriptor *d = p1; 984 985 id = d->bSourceID; 986 break; /* continue to parse */ 987 } 988 case PTYPE(UAC_VERSION_1, UAC_INPUT_TERMINAL): 989 return parse_term_uac1_iterm_unit(state, term, p1, id); 990 case PTYPE(UAC_VERSION_2, UAC_INPUT_TERMINAL): 991 return parse_term_uac2_iterm_unit(state, term, p1, id); 992 case PTYPE(UAC_VERSION_3, UAC_INPUT_TERMINAL): 993 return parse_term_uac3_iterm_unit(state, term, p1, id); 994 case PTYPE(UAC_VERSION_1, UAC_MIXER_UNIT): 995 case PTYPE(UAC_VERSION_2, UAC_MIXER_UNIT): 996 case PTYPE(UAC_VERSION_3, UAC3_MIXER_UNIT): 997 return parse_term_mixer_unit(state, term, p1, id); 998 case PTYPE(UAC_VERSION_1, UAC_SELECTOR_UNIT): 999 case PTYPE(UAC_VERSION_2, UAC_SELECTOR_UNIT): 1000 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SELECTOR): 1001 case PTYPE(UAC_VERSION_3, UAC3_SELECTOR_UNIT): 1002 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SELECTOR): 1003 return parse_term_selector_unit(state, term, p1, id); 1004 case PTYPE(UAC_VERSION_1, UAC1_PROCESSING_UNIT): 1005 case PTYPE(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2): 1006 case PTYPE(UAC_VERSION_3, UAC3_PROCESSING_UNIT): 1007 return parse_term_proc_unit(state, term, p1, id, 1008 UAC3_PROCESSING_UNIT); 1009 case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT): 1010 case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT): 1011 return parse_term_effect_unit(state, term, p1, id); 1012 case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT): 1013 case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2): 1014 case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT): 1015 return parse_term_proc_unit(state, term, p1, id, 1016 UAC3_EXTENSION_UNIT); 1017 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SOURCE): 1018 return parse_term_uac2_clock_source(state, term, p1, id); 1019 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SOURCE): 1020 return parse_term_uac3_clock_source(state, term, p1, id); 1021 default: 1022 return -ENODEV; 1023 } 1024 } 1025 return -ENODEV; 1026 } 1027 1028 1029 static int check_input_term(struct mixer_build *state, int id, 1030 struct usb_audio_term *term) 1031 { 1032 memset(term, 0, sizeof(*term)); 1033 memset(state->termbitmap, 0, sizeof(state->termbitmap)); 1034 return __check_input_term(state, id, term); 1035 } 1036 1037 /* 1038 * Feature Unit 1039 */ 1040 1041 /* feature unit control information */ 1042 struct usb_feature_control_info { 1043 int control; 1044 const char *name; 1045 int type; /* data type for uac1 */ 1046 int type_uac2; /* data type for uac2 if different from uac1, else -1 */ 1047 }; 1048 1049 static const struct usb_feature_control_info audio_feature_info[] = { 1050 { UAC_FU_MUTE, "Mute", USB_MIXER_INV_BOOLEAN, -1 }, 1051 { UAC_FU_VOLUME, "Volume", USB_MIXER_S16, -1 }, 1052 { UAC_FU_BASS, "Tone Control - Bass", USB_MIXER_S8, -1 }, 1053 { UAC_FU_MID, "Tone Control - Mid", USB_MIXER_S8, -1 }, 1054 { UAC_FU_TREBLE, "Tone Control - Treble", USB_MIXER_S8, -1 }, 1055 { UAC_FU_GRAPHIC_EQUALIZER, "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemented yet */ 1056 { UAC_FU_AUTOMATIC_GAIN, "Auto Gain Control", USB_MIXER_BOOLEAN, -1 }, 1057 { UAC_FU_DELAY, "Delay Control", USB_MIXER_U16, USB_MIXER_U32 }, 1058 { UAC_FU_BASS_BOOST, "Bass Boost", USB_MIXER_BOOLEAN, -1 }, 1059 { UAC_FU_LOUDNESS, "Loudness", USB_MIXER_BOOLEAN, -1 }, 1060 /* UAC2 specific */ 1061 { UAC2_FU_INPUT_GAIN, "Input Gain Control", USB_MIXER_S16, -1 }, 1062 { UAC2_FU_INPUT_GAIN_PAD, "Input Gain Pad Control", USB_MIXER_S16, -1 }, 1063 { UAC2_FU_PHASE_INVERTER, "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 }, 1064 }; 1065 1066 static void usb_mixer_elem_info_free(struct usb_mixer_elem_info *cval) 1067 { 1068 kfree(cval); 1069 } 1070 1071 /* private_free callback */ 1072 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl) 1073 { 1074 usb_mixer_elem_info_free(kctl->private_data); 1075 kctl->private_data = NULL; 1076 } 1077 1078 /* 1079 * interface to ALSA control for feature/mixer units 1080 */ 1081 1082 /* volume control quirks */ 1083 static void volume_control_quirks(struct usb_mixer_elem_info *cval, 1084 struct snd_kcontrol *kctl) 1085 { 1086 struct snd_usb_audio *chip = cval->head.mixer->chip; 1087 switch (chip->usb_id) { 1088 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ 1089 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */ 1090 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 1091 cval->min = 0x0000; 1092 cval->max = 0xffff; 1093 cval->res = 0x00e6; 1094 break; 1095 } 1096 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 1097 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 1098 cval->min = 0x00; 1099 cval->max = 0xff; 1100 break; 1101 } 1102 if (strstr(kctl->id.name, "Effect Return") != NULL) { 1103 cval->min = 0xb706; 1104 cval->max = 0xff7b; 1105 cval->res = 0x0073; 1106 break; 1107 } 1108 if ((strstr(kctl->id.name, "Playback Volume") != NULL) || 1109 (strstr(kctl->id.name, "Effect Send") != NULL)) { 1110 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */ 1111 cval->max = 0xfcfe; 1112 cval->res = 0x0073; 1113 } 1114 break; 1115 1116 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */ 1117 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */ 1118 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 1119 usb_audio_info(chip, 1120 "set quirk for FTU Effect Duration\n"); 1121 cval->min = 0x0000; 1122 cval->max = 0x7f00; 1123 cval->res = 0x0100; 1124 break; 1125 } 1126 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 1127 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 1128 usb_audio_info(chip, 1129 "set quirks for FTU Effect Feedback/Volume\n"); 1130 cval->min = 0x00; 1131 cval->max = 0x7f; 1132 break; 1133 } 1134 break; 1135 1136 case USB_ID(0x0d8c, 0x0103): 1137 if (!strcmp(kctl->id.name, "PCM Playback Volume")) { 1138 usb_audio_info(chip, 1139 "set volume quirk for CM102-A+/102S+\n"); 1140 cval->min = -256; 1141 } 1142 break; 1143 1144 case USB_ID(0x0471, 0x0101): 1145 case USB_ID(0x0471, 0x0104): 1146 case USB_ID(0x0471, 0x0105): 1147 case USB_ID(0x0672, 0x1041): 1148 /* quirk for UDA1321/N101. 1149 * note that detection between firmware 2.1.1.7 (N101) 1150 * and later 2.1.1.21 is not very clear from datasheets. 1151 * I hope that the min value is -15360 for newer firmware --jk 1152 */ 1153 if (!strcmp(kctl->id.name, "PCM Playback Volume") && 1154 cval->min == -15616) { 1155 usb_audio_info(chip, 1156 "set volume quirk for UDA1321/N101 chip\n"); 1157 cval->max = -256; 1158 } 1159 break; 1160 1161 case USB_ID(0x046d, 0x09a4): 1162 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 1163 usb_audio_info(chip, 1164 "set volume quirk for QuickCam E3500\n"); 1165 cval->min = 6080; 1166 cval->max = 8768; 1167 cval->res = 192; 1168 } 1169 break; 1170 1171 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */ 1172 case USB_ID(0x046d, 0x0808): 1173 case USB_ID(0x046d, 0x0809): 1174 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */ 1175 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */ 1176 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */ 1177 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */ 1178 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */ 1179 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */ 1180 case USB_ID(0x046d, 0x0991): 1181 case USB_ID(0x046d, 0x09a2): /* QuickCam Communicate Deluxe/S7500 */ 1182 /* Most audio usb devices lie about volume resolution. 1183 * Most Logitech webcams have res = 384. 1184 * Probably there is some logitech magic behind this number --fishor 1185 */ 1186 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 1187 usb_audio_info(chip, 1188 "set resolution quirk: cval->res = 384\n"); 1189 cval->res = 384; 1190 } 1191 break; 1192 case USB_ID(0x0495, 0x3042): /* ESS Technology Asus USB DAC */ 1193 if ((strstr(kctl->id.name, "Playback Volume") != NULL) || 1194 strstr(kctl->id.name, "Capture Volume") != NULL) { 1195 cval->min >>= 8; 1196 cval->max = 0; 1197 cval->res = 1; 1198 } 1199 break; 1200 case USB_ID(0x1224, 0x2a25): /* Jieli Technology USB PHY 2.0 */ 1201 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 1202 usb_audio_info(chip, 1203 "set resolution quirk: cval->res = 16\n"); 1204 cval->res = 16; 1205 } 1206 break; 1207 } 1208 } 1209 1210 /* forcibly initialize the current mixer value; if GET_CUR fails, set to 1211 * the minimum as default 1212 */ 1213 static void init_cur_mix_raw(struct usb_mixer_elem_info *cval, int ch, int idx) 1214 { 1215 int val, err; 1216 1217 err = snd_usb_get_cur_mix_value(cval, ch, idx, &val); 1218 if (!err) 1219 return; 1220 if (!cval->head.mixer->ignore_ctl_error) 1221 usb_audio_warn(cval->head.mixer->chip, 1222 "%d:%d: failed to get current value for ch %d (%d)\n", 1223 cval->head.id, mixer_ctrl_intf(cval->head.mixer), 1224 ch, err); 1225 snd_usb_set_cur_mix_value(cval, ch, idx, cval->min); 1226 } 1227 1228 /* 1229 * retrieve the minimum and maximum values for the specified control 1230 */ 1231 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval, 1232 int default_min, struct snd_kcontrol *kctl) 1233 { 1234 int i, idx; 1235 1236 /* for failsafe */ 1237 cval->min = default_min; 1238 cval->max = cval->min + 1; 1239 cval->res = 1; 1240 cval->dBmin = cval->dBmax = 0; 1241 1242 if (cval->val_type == USB_MIXER_BOOLEAN || 1243 cval->val_type == USB_MIXER_INV_BOOLEAN) { 1244 cval->initialized = 1; 1245 } else { 1246 int minchn = 0; 1247 if (cval->cmask) { 1248 for (i = 0; i < MAX_CHANNELS; i++) 1249 if (cval->cmask & (1 << i)) { 1250 minchn = i + 1; 1251 break; 1252 } 1253 } 1254 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 || 1255 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) { 1256 usb_audio_err(cval->head.mixer->chip, 1257 "%d:%d: cannot get min/max values for control %d (id %d)\n", 1258 cval->head.id, mixer_ctrl_intf(cval->head.mixer), 1259 cval->control, cval->head.id); 1260 return -EINVAL; 1261 } 1262 if (get_ctl_value(cval, UAC_GET_RES, 1263 (cval->control << 8) | minchn, 1264 &cval->res) < 0) { 1265 cval->res = 1; 1266 } else if (cval->head.mixer->protocol == UAC_VERSION_1) { 1267 int last_valid_res = cval->res; 1268 1269 while (cval->res > 1) { 1270 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES, 1271 (cval->control << 8) | minchn, 1272 cval->res / 2) < 0) 1273 break; 1274 cval->res /= 2; 1275 } 1276 if (get_ctl_value(cval, UAC_GET_RES, 1277 (cval->control << 8) | minchn, &cval->res) < 0) 1278 cval->res = last_valid_res; 1279 } 1280 if (cval->res == 0) 1281 cval->res = 1; 1282 1283 /* Additional checks for the proper resolution 1284 * 1285 * Some devices report smaller resolutions than actually 1286 * reacting. They don't return errors but simply clip 1287 * to the lower aligned value. 1288 */ 1289 if (cval->min + cval->res < cval->max) { 1290 int last_valid_res = cval->res; 1291 int saved, test, check; 1292 if (get_cur_mix_raw(cval, minchn, &saved) < 0) 1293 goto no_res_check; 1294 for (;;) { 1295 test = saved; 1296 if (test < cval->max) 1297 test += cval->res; 1298 else 1299 test -= cval->res; 1300 if (test < cval->min || test > cval->max || 1301 snd_usb_set_cur_mix_value(cval, minchn, 0, test) || 1302 get_cur_mix_raw(cval, minchn, &check)) { 1303 cval->res = last_valid_res; 1304 break; 1305 } 1306 if (test == check) 1307 break; 1308 cval->res *= 2; 1309 } 1310 snd_usb_set_cur_mix_value(cval, minchn, 0, saved); 1311 } 1312 1313 no_res_check: 1314 cval->initialized = 1; 1315 } 1316 1317 if (kctl) 1318 volume_control_quirks(cval, kctl); 1319 1320 /* USB descriptions contain the dB scale in 1/256 dB unit 1321 * while ALSA TLV contains in 1/100 dB unit 1322 */ 1323 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; 1324 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; 1325 if (cval->dBmin > cval->dBmax) { 1326 /* something is wrong; assume it's either from/to 0dB */ 1327 if (cval->dBmin < 0) 1328 cval->dBmax = 0; 1329 else if (cval->dBmin > 0) 1330 cval->dBmin = 0; 1331 if (cval->dBmin > cval->dBmax) { 1332 /* totally crap, return an error */ 1333 return -EINVAL; 1334 } 1335 } else { 1336 /* if the max volume is too low, it's likely a bogus range; 1337 * here we use -96dB as the threshold 1338 */ 1339 if (cval->dBmax <= -9600) { 1340 usb_audio_info(cval->head.mixer->chip, 1341 "%d:%d: bogus dB values (%d/%d), disabling dB reporting\n", 1342 cval->head.id, mixer_ctrl_intf(cval->head.mixer), 1343 cval->dBmin, cval->dBmax); 1344 cval->dBmin = cval->dBmax = 0; 1345 } 1346 } 1347 1348 /* initialize all elements */ 1349 if (!cval->cmask) { 1350 init_cur_mix_raw(cval, 0, 0); 1351 } else { 1352 idx = 0; 1353 for (i = 0; i < MAX_CHANNELS; i++) { 1354 if (cval->cmask & (1 << i)) { 1355 init_cur_mix_raw(cval, i + 1, idx); 1356 idx++; 1357 } 1358 } 1359 } 1360 1361 return 0; 1362 } 1363 1364 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL) 1365 1366 /* get a feature/mixer unit info */ 1367 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, 1368 struct snd_ctl_elem_info *uinfo) 1369 { 1370 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1371 1372 if (cval->val_type == USB_MIXER_BOOLEAN || 1373 cval->val_type == USB_MIXER_INV_BOOLEAN) 1374 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 1375 else 1376 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 1377 uinfo->count = cval->channels; 1378 if (cval->val_type == USB_MIXER_BOOLEAN || 1379 cval->val_type == USB_MIXER_INV_BOOLEAN) { 1380 uinfo->value.integer.min = 0; 1381 uinfo->value.integer.max = 1; 1382 } else { 1383 if (!cval->initialized) { 1384 get_min_max_with_quirks(cval, 0, kcontrol); 1385 if (cval->initialized && cval->dBmin >= cval->dBmax) { 1386 kcontrol->vd[0].access &= 1387 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1388 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); 1389 snd_ctl_notify(cval->head.mixer->chip->card, 1390 SNDRV_CTL_EVENT_MASK_INFO, 1391 &kcontrol->id); 1392 } 1393 } 1394 uinfo->value.integer.min = 0; 1395 uinfo->value.integer.max = 1396 DIV_ROUND_UP(cval->max - cval->min, cval->res); 1397 } 1398 return 0; 1399 } 1400 1401 /* get the current value from feature/mixer unit */ 1402 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, 1403 struct snd_ctl_elem_value *ucontrol) 1404 { 1405 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1406 int c, cnt, val, err; 1407 1408 ucontrol->value.integer.value[0] = cval->min; 1409 if (cval->cmask) { 1410 cnt = 0; 1411 for (c = 0; c < MAX_CHANNELS; c++) { 1412 if (!(cval->cmask & (1 << c))) 1413 continue; 1414 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val); 1415 if (err < 0) 1416 return filter_error(cval, err); 1417 val = get_relative_value(cval, val); 1418 ucontrol->value.integer.value[cnt] = val; 1419 cnt++; 1420 } 1421 return 0; 1422 } else { 1423 /* master channel */ 1424 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val); 1425 if (err < 0) 1426 return filter_error(cval, err); 1427 val = get_relative_value(cval, val); 1428 ucontrol->value.integer.value[0] = val; 1429 } 1430 return 0; 1431 } 1432 1433 /* put the current value to feature/mixer unit */ 1434 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, 1435 struct snd_ctl_elem_value *ucontrol) 1436 { 1437 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1438 int c, cnt, val, oval, err; 1439 int changed = 0; 1440 1441 if (cval->cmask) { 1442 cnt = 0; 1443 for (c = 0; c < MAX_CHANNELS; c++) { 1444 if (!(cval->cmask & (1 << c))) 1445 continue; 1446 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval); 1447 if (err < 0) 1448 return filter_error(cval, err); 1449 val = ucontrol->value.integer.value[cnt]; 1450 val = get_abs_value(cval, val); 1451 if (oval != val) { 1452 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val); 1453 changed = 1; 1454 } 1455 cnt++; 1456 } 1457 } else { 1458 /* master channel */ 1459 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval); 1460 if (err < 0) 1461 return filter_error(cval, err); 1462 val = ucontrol->value.integer.value[0]; 1463 val = get_abs_value(cval, val); 1464 if (val != oval) { 1465 snd_usb_set_cur_mix_value(cval, 0, 0, val); 1466 changed = 1; 1467 } 1468 } 1469 return changed; 1470 } 1471 1472 /* get the boolean value from the master channel of a UAC control */ 1473 static int mixer_ctl_master_bool_get(struct snd_kcontrol *kcontrol, 1474 struct snd_ctl_elem_value *ucontrol) 1475 { 1476 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1477 int val, err; 1478 1479 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val); 1480 if (err < 0) 1481 return filter_error(cval, err); 1482 val = (val != 0); 1483 ucontrol->value.integer.value[0] = val; 1484 return 0; 1485 } 1486 1487 static int get_connector_value(struct usb_mixer_elem_info *cval, 1488 char *name, int *val) 1489 { 1490 struct snd_usb_audio *chip = cval->head.mixer->chip; 1491 int idx = 0, validx, ret; 1492 1493 validx = cval->control << 8 | 0; 1494 1495 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0; 1496 if (ret) 1497 goto error; 1498 1499 idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8); 1500 if (cval->head.mixer->protocol == UAC_VERSION_2) { 1501 struct uac2_connectors_ctl_blk uac2_conn; 1502 1503 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), UAC2_CS_CUR, 1504 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 1505 validx, idx, &uac2_conn, sizeof(uac2_conn)); 1506 if (val) 1507 *val = !!uac2_conn.bNrChannels; 1508 } else { /* UAC_VERSION_3 */ 1509 struct uac3_insertion_ctl_blk uac3_conn; 1510 1511 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), UAC2_CS_CUR, 1512 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 1513 validx, idx, &uac3_conn, sizeof(uac3_conn)); 1514 if (val) 1515 *val = !!uac3_conn.bmConInserted; 1516 } 1517 1518 snd_usb_unlock_shutdown(chip); 1519 1520 if (ret < 0) { 1521 if (name && strstr(name, "Speaker")) { 1522 if (val) 1523 *val = 1; 1524 return 0; 1525 } 1526 error: 1527 usb_audio_err(chip, 1528 "cannot get connectors status: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 1529 UAC_GET_CUR, validx, idx, cval->val_type); 1530 1531 if (val) 1532 *val = 0; 1533 1534 return filter_error(cval, ret); 1535 } 1536 1537 return ret; 1538 } 1539 1540 /* get the connectors status and report it as boolean type */ 1541 static int mixer_ctl_connector_get(struct snd_kcontrol *kcontrol, 1542 struct snd_ctl_elem_value *ucontrol) 1543 { 1544 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1545 int ret, val; 1546 1547 ret = get_connector_value(cval, kcontrol->id.name, &val); 1548 1549 if (ret < 0) 1550 return ret; 1551 1552 ucontrol->value.integer.value[0] = val; 1553 return 0; 1554 } 1555 1556 static const struct snd_kcontrol_new usb_feature_unit_ctl = { 1557 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1558 .name = "", /* will be filled later manually */ 1559 .info = mixer_ctl_feature_info, 1560 .get = mixer_ctl_feature_get, 1561 .put = mixer_ctl_feature_put, 1562 }; 1563 1564 /* the read-only variant */ 1565 static const struct snd_kcontrol_new usb_feature_unit_ctl_ro = { 1566 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1567 .name = "", /* will be filled later manually */ 1568 .info = mixer_ctl_feature_info, 1569 .get = mixer_ctl_feature_get, 1570 .put = NULL, 1571 }; 1572 1573 /* 1574 * A control which shows the boolean value from reading a UAC control on 1575 * the master channel. 1576 */ 1577 static const struct snd_kcontrol_new usb_bool_master_control_ctl_ro = { 1578 .iface = SNDRV_CTL_ELEM_IFACE_CARD, 1579 .name = "", /* will be filled later manually */ 1580 .access = SNDRV_CTL_ELEM_ACCESS_READ, 1581 .info = snd_ctl_boolean_mono_info, 1582 .get = mixer_ctl_master_bool_get, 1583 .put = NULL, 1584 }; 1585 1586 static const struct snd_kcontrol_new usb_connector_ctl_ro = { 1587 .iface = SNDRV_CTL_ELEM_IFACE_CARD, 1588 .name = "", /* will be filled later manually */ 1589 .access = SNDRV_CTL_ELEM_ACCESS_READ, 1590 .info = snd_ctl_boolean_mono_info, 1591 .get = mixer_ctl_connector_get, 1592 .put = NULL, 1593 }; 1594 1595 /* 1596 * This symbol is exported in order to allow the mixer quirks to 1597 * hook up to the standard feature unit control mechanism 1598 */ 1599 const struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl; 1600 1601 /* 1602 * build a feature control 1603 */ 1604 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str) 1605 { 1606 return strlcat(kctl->id.name, str, sizeof(kctl->id.name)); 1607 } 1608 1609 /* 1610 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we 1611 * rename it to "Headphone". We determine if something is a headphone 1612 * similar to how udev determines form factor. 1613 */ 1614 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl, 1615 struct snd_card *card) 1616 { 1617 static const char * const names_to_check[] = { 1618 "Headset", "headset", "Headphone", "headphone", NULL}; 1619 const char * const *s; 1620 bool found = false; 1621 1622 if (strcmp("Speaker", kctl->id.name)) 1623 return; 1624 1625 for (s = names_to_check; *s; s++) 1626 if (strstr(card->shortname, *s)) { 1627 found = true; 1628 break; 1629 } 1630 1631 if (!found) 1632 return; 1633 1634 snd_ctl_rename(card, kctl, "Headphone"); 1635 } 1636 1637 static const struct usb_feature_control_info *get_feature_control_info(int control) 1638 { 1639 int i; 1640 1641 for (i = 0; i < ARRAY_SIZE(audio_feature_info); ++i) { 1642 if (audio_feature_info[i].control == control) 1643 return &audio_feature_info[i]; 1644 } 1645 return NULL; 1646 } 1647 1648 static void __build_feature_ctl(struct usb_mixer_interface *mixer, 1649 const struct usbmix_name_map *imap, 1650 unsigned int ctl_mask, int control, 1651 struct usb_audio_term *iterm, 1652 struct usb_audio_term *oterm, 1653 int unitid, int nameid, int readonly_mask) 1654 { 1655 const struct usb_feature_control_info *ctl_info; 1656 unsigned int len = 0; 1657 int mapped_name = 0; 1658 struct snd_kcontrol *kctl; 1659 struct usb_mixer_elem_info *cval; 1660 const struct usbmix_name_map *map; 1661 unsigned int range; 1662 1663 if (control == UAC_FU_GRAPHIC_EQUALIZER) { 1664 /* FIXME: not supported yet */ 1665 return; 1666 } 1667 1668 map = find_map(imap, unitid, control); 1669 if (check_ignored_ctl(map)) 1670 return; 1671 1672 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1673 if (!cval) 1674 return; 1675 snd_usb_mixer_elem_init_std(&cval->head, mixer, unitid); 1676 cval->control = control; 1677 cval->cmask = ctl_mask; 1678 1679 ctl_info = get_feature_control_info(control); 1680 if (!ctl_info) { 1681 usb_mixer_elem_info_free(cval); 1682 return; 1683 } 1684 if (mixer->protocol == UAC_VERSION_1) 1685 cval->val_type = ctl_info->type; 1686 else /* UAC_VERSION_2 */ 1687 cval->val_type = ctl_info->type_uac2 >= 0 ? 1688 ctl_info->type_uac2 : ctl_info->type; 1689 1690 if (ctl_mask == 0) { 1691 cval->channels = 1; /* master channel */ 1692 cval->master_readonly = readonly_mask; 1693 } else { 1694 int i, c = 0; 1695 for (i = 0; i < 16; i++) 1696 if (ctl_mask & (1 << i)) 1697 c++; 1698 cval->channels = c; 1699 cval->ch_readonly = readonly_mask; 1700 } 1701 1702 /* 1703 * If all channels in the mask are marked read-only, make the control 1704 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't 1705 * issue write commands to read-only channels. 1706 */ 1707 if (cval->channels == readonly_mask) 1708 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); 1709 else 1710 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1711 1712 if (!kctl) { 1713 usb_audio_err(mixer->chip, "cannot malloc kcontrol\n"); 1714 usb_mixer_elem_info_free(cval); 1715 return; 1716 } 1717 kctl->private_free = snd_usb_mixer_elem_free; 1718 1719 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1720 mapped_name = len != 0; 1721 if (!len && nameid) 1722 len = snd_usb_copy_string_desc(mixer->chip, nameid, 1723 kctl->id.name, sizeof(kctl->id.name)); 1724 1725 switch (control) { 1726 case UAC_FU_MUTE: 1727 case UAC_FU_VOLUME: 1728 /* 1729 * determine the control name. the rule is: 1730 * - if a name id is given in descriptor, use it. 1731 * - if the connected input can be determined, then use the name 1732 * of terminal type. 1733 * - if the connected output can be determined, use it. 1734 * - otherwise, anonymous name. 1735 */ 1736 if (!len) { 1737 if (iterm) 1738 len = get_term_name(mixer->chip, iterm, 1739 kctl->id.name, 1740 sizeof(kctl->id.name), 1); 1741 if (!len && oterm) 1742 len = get_term_name(mixer->chip, oterm, 1743 kctl->id.name, 1744 sizeof(kctl->id.name), 1); 1745 if (!len) 1746 snprintf(kctl->id.name, sizeof(kctl->id.name), 1747 "Feature %d", unitid); 1748 } 1749 1750 if (!mapped_name) 1751 check_no_speaker_on_headset(kctl, mixer->chip->card); 1752 1753 /* 1754 * determine the stream direction: 1755 * if the connected output is USB stream, then it's likely a 1756 * capture stream. otherwise it should be playback (hopefully :) 1757 */ 1758 if (!mapped_name && oterm && !(oterm->type >> 16)) { 1759 if ((oterm->type & 0xff00) == 0x0100) 1760 append_ctl_name(kctl, " Capture"); 1761 else 1762 append_ctl_name(kctl, " Playback"); 1763 } 1764 append_ctl_name(kctl, control == UAC_FU_MUTE ? 1765 " Switch" : " Volume"); 1766 break; 1767 default: 1768 if (!len) 1769 strscpy(kctl->id.name, audio_feature_info[control-1].name, 1770 sizeof(kctl->id.name)); 1771 break; 1772 } 1773 1774 /* get min/max values */ 1775 get_min_max_with_quirks(cval, 0, kctl); 1776 1777 /* skip a bogus volume range */ 1778 if (cval->max <= cval->min) { 1779 usb_audio_dbg(mixer->chip, 1780 "[%d] FU [%s] skipped due to invalid volume\n", 1781 cval->head.id, kctl->id.name); 1782 snd_ctl_free_one(kctl); 1783 return; 1784 } 1785 1786 1787 if (control == UAC_FU_VOLUME) { 1788 check_mapped_dB(map, cval); 1789 if (cval->dBmin < cval->dBmax || !cval->initialized) { 1790 kctl->tlv.c = snd_usb_mixer_vol_tlv; 1791 kctl->vd[0].access |= 1792 SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1793 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; 1794 } 1795 } 1796 1797 snd_usb_mixer_fu_apply_quirk(mixer, cval, unitid, kctl); 1798 1799 range = (cval->max - cval->min) / cval->res; 1800 /* 1801 * Are there devices with volume range more than 255? I use a bit more 1802 * to be sure. 384 is a resolution magic number found on Logitech 1803 * devices. It will definitively catch all buggy Logitech devices. 1804 */ 1805 if (range > 384) { 1806 usb_audio_warn(mixer->chip, 1807 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.", 1808 range); 1809 usb_audio_warn(mixer->chip, 1810 "[%d] FU [%s] ch = %d, val = %d/%d/%d", 1811 cval->head.id, kctl->id.name, cval->channels, 1812 cval->min, cval->max, cval->res); 1813 } 1814 1815 usb_audio_dbg(mixer->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n", 1816 cval->head.id, kctl->id.name, cval->channels, 1817 cval->min, cval->max, cval->res); 1818 snd_usb_mixer_add_control(&cval->head, kctl); 1819 } 1820 1821 static void build_feature_ctl(struct mixer_build *state, void *raw_desc, 1822 unsigned int ctl_mask, int control, 1823 struct usb_audio_term *iterm, int unitid, 1824 int readonly_mask) 1825 { 1826 struct uac_feature_unit_descriptor *desc = raw_desc; 1827 int nameid = uac_feature_unit_iFeature(desc); 1828 1829 __build_feature_ctl(state->mixer, state->map, ctl_mask, control, 1830 iterm, &state->oterm, unitid, nameid, readonly_mask); 1831 } 1832 1833 static void build_feature_ctl_badd(struct usb_mixer_interface *mixer, 1834 unsigned int ctl_mask, int control, int unitid, 1835 const struct usbmix_name_map *badd_map) 1836 { 1837 __build_feature_ctl(mixer, badd_map, ctl_mask, control, 1838 NULL, NULL, unitid, 0, 0); 1839 } 1840 1841 static void get_connector_control_name(struct usb_mixer_interface *mixer, 1842 struct usb_audio_term *term, 1843 bool is_input, char *name, int name_size) 1844 { 1845 int name_len = get_term_name(mixer->chip, term, name, name_size, 0); 1846 1847 if (name_len == 0) 1848 strscpy(name, "Unknown", name_size); 1849 1850 /* 1851 * sound/core/ctljack.c has a convention of naming jack controls 1852 * by ending in " Jack". Make it slightly more useful by 1853 * indicating Input or Output after the terminal name. 1854 */ 1855 if (is_input) 1856 strlcat(name, " - Input Jack", name_size); 1857 else 1858 strlcat(name, " - Output Jack", name_size); 1859 } 1860 1861 /* get connector value to "wake up" the USB audio */ 1862 static int connector_mixer_resume(struct usb_mixer_elem_list *list) 1863 { 1864 struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list); 1865 1866 get_connector_value(cval, NULL, NULL); 1867 return 0; 1868 } 1869 1870 /* Build a mixer control for a UAC connector control (jack-detect) */ 1871 static void build_connector_control(struct usb_mixer_interface *mixer, 1872 const struct usbmix_name_map *imap, 1873 struct usb_audio_term *term, bool is_input) 1874 { 1875 struct snd_kcontrol *kctl; 1876 struct usb_mixer_elem_info *cval; 1877 const struct usbmix_name_map *map; 1878 1879 map = find_map(imap, term->id, 0); 1880 if (check_ignored_ctl(map)) 1881 return; 1882 1883 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1884 if (!cval) 1885 return; 1886 snd_usb_mixer_elem_init_std(&cval->head, mixer, term->id); 1887 1888 /* set up a specific resume callback */ 1889 cval->head.resume = connector_mixer_resume; 1890 1891 /* 1892 * UAC2: The first byte from reading the UAC2_TE_CONNECTOR control returns the 1893 * number of channels connected. 1894 * 1895 * UAC3: The first byte specifies size of bitmap for the inserted controls. The 1896 * following byte(s) specifies which connectors are inserted. 1897 * 1898 * This boolean ctl will simply report if any channels are connected 1899 * or not. 1900 */ 1901 if (mixer->protocol == UAC_VERSION_2) 1902 cval->control = UAC2_TE_CONNECTOR; 1903 else /* UAC_VERSION_3 */ 1904 cval->control = UAC3_TE_INSERTION; 1905 1906 cval->val_type = USB_MIXER_BOOLEAN; 1907 cval->channels = 1; /* report true if any channel is connected */ 1908 cval->min = 0; 1909 cval->max = 1; 1910 kctl = snd_ctl_new1(&usb_connector_ctl_ro, cval); 1911 if (!kctl) { 1912 usb_audio_err(mixer->chip, "cannot malloc kcontrol\n"); 1913 usb_mixer_elem_info_free(cval); 1914 return; 1915 } 1916 1917 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) 1918 strlcat(kctl->id.name, " Jack", sizeof(kctl->id.name)); 1919 else 1920 get_connector_control_name(mixer, term, is_input, kctl->id.name, 1921 sizeof(kctl->id.name)); 1922 kctl->private_free = snd_usb_mixer_elem_free; 1923 snd_usb_mixer_add_control(&cval->head, kctl); 1924 } 1925 1926 static int parse_clock_source_unit(struct mixer_build *state, int unitid, 1927 void *_ftr) 1928 { 1929 struct uac_clock_source_descriptor *hdr = _ftr; 1930 struct usb_mixer_elem_info *cval; 1931 struct snd_kcontrol *kctl; 1932 char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; 1933 int ret; 1934 1935 if (state->mixer->protocol != UAC_VERSION_2) 1936 return -EINVAL; 1937 1938 /* 1939 * The only property of this unit we are interested in is the 1940 * clock source validity. If that isn't readable, just bail out. 1941 */ 1942 if (!uac_v2v3_control_is_readable(hdr->bmControls, 1943 UAC2_CS_CONTROL_CLOCK_VALID)) 1944 return 0; 1945 1946 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1947 if (!cval) 1948 return -ENOMEM; 1949 1950 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, hdr->bClockID); 1951 1952 cval->min = 0; 1953 cval->max = 1; 1954 cval->channels = 1; 1955 cval->val_type = USB_MIXER_BOOLEAN; 1956 cval->control = UAC2_CS_CONTROL_CLOCK_VALID; 1957 1958 cval->master_readonly = 1; 1959 /* From UAC2 5.2.5.1.2 "Only the get request is supported." */ 1960 kctl = snd_ctl_new1(&usb_bool_master_control_ctl_ro, cval); 1961 1962 if (!kctl) { 1963 usb_mixer_elem_info_free(cval); 1964 return -ENOMEM; 1965 } 1966 1967 kctl->private_free = snd_usb_mixer_elem_free; 1968 ret = snd_usb_copy_string_desc(state->chip, hdr->iClockSource, 1969 name, sizeof(name)); 1970 if (ret > 0) 1971 snprintf(kctl->id.name, sizeof(kctl->id.name), 1972 "%s Validity", name); 1973 else 1974 snprintf(kctl->id.name, sizeof(kctl->id.name), 1975 "Clock Source %d Validity", hdr->bClockID); 1976 1977 return snd_usb_mixer_add_control(&cval->head, kctl); 1978 } 1979 1980 /* 1981 * parse a feature unit 1982 * 1983 * most of controls are defined here. 1984 */ 1985 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, 1986 void *_ftr) 1987 { 1988 int channels, i, j; 1989 struct usb_audio_term iterm; 1990 unsigned int master_bits; 1991 int err, csize; 1992 struct uac_feature_unit_descriptor *hdr = _ftr; 1993 __u8 *bmaControls; 1994 1995 if (state->mixer->protocol == UAC_VERSION_1) { 1996 csize = hdr->bControlSize; 1997 channels = (hdr->bLength - 7) / csize - 1; 1998 bmaControls = hdr->bmaControls; 1999 } else if (state->mixer->protocol == UAC_VERSION_2) { 2000 struct uac2_feature_unit_descriptor *ftr = _ftr; 2001 csize = 4; 2002 channels = (hdr->bLength - 6) / 4 - 1; 2003 bmaControls = ftr->bmaControls; 2004 } else { /* UAC_VERSION_3 */ 2005 struct uac3_feature_unit_descriptor *ftr = _ftr; 2006 2007 csize = 4; 2008 channels = (ftr->bLength - 7) / 4 - 1; 2009 bmaControls = ftr->bmaControls; 2010 } 2011 2012 /* parse the source unit */ 2013 err = parse_audio_unit(state, hdr->bSourceID); 2014 if (err < 0) 2015 return err; 2016 2017 /* determine the input source type and name */ 2018 err = check_input_term(state, hdr->bSourceID, &iterm); 2019 if (err < 0) 2020 return err; 2021 2022 master_bits = snd_usb_combine_bytes(bmaControls, csize); 2023 /* master configuration quirks */ 2024 switch (state->chip->usb_id) { 2025 case USB_ID(0x08bb, 0x2702): 2026 usb_audio_info(state->chip, 2027 "usbmixer: master volume quirk for PCM2702 chip\n"); 2028 /* disable non-functional volume control */ 2029 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME); 2030 break; 2031 case USB_ID(0x1130, 0xf211): 2032 usb_audio_info(state->chip, 2033 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n"); 2034 /* disable non-functional volume control */ 2035 channels = 0; 2036 break; 2037 2038 } 2039 2040 if (state->mixer->protocol == UAC_VERSION_1) { 2041 /* check all control types */ 2042 for (i = 0; i < 10; i++) { 2043 unsigned int ch_bits = 0; 2044 int control = audio_feature_info[i].control; 2045 2046 for (j = 0; j < channels; j++) { 2047 unsigned int mask; 2048 2049 mask = snd_usb_combine_bytes(bmaControls + 2050 csize * (j+1), csize); 2051 if (mask & (1 << i)) 2052 ch_bits |= (1 << j); 2053 } 2054 /* audio class v1 controls are never read-only */ 2055 2056 /* 2057 * The first channel must be set 2058 * (for ease of programming). 2059 */ 2060 if (ch_bits & 1) 2061 build_feature_ctl(state, _ftr, ch_bits, control, 2062 &iterm, unitid, 0); 2063 if (master_bits & (1 << i)) 2064 build_feature_ctl(state, _ftr, 0, control, 2065 &iterm, unitid, 0); 2066 } 2067 } else { /* UAC_VERSION_2/3 */ 2068 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) { 2069 unsigned int ch_bits = 0; 2070 unsigned int ch_read_only = 0; 2071 int control = audio_feature_info[i].control; 2072 2073 for (j = 0; j < channels; j++) { 2074 unsigned int mask; 2075 2076 mask = snd_usb_combine_bytes(bmaControls + 2077 csize * (j+1), csize); 2078 if (uac_v2v3_control_is_readable(mask, control)) { 2079 ch_bits |= (1 << j); 2080 if (!uac_v2v3_control_is_writeable(mask, control)) 2081 ch_read_only |= (1 << j); 2082 } 2083 } 2084 2085 /* 2086 * NOTE: build_feature_ctl() will mark the control 2087 * read-only if all channels are marked read-only in 2088 * the descriptors. Otherwise, the control will be 2089 * reported as writeable, but the driver will not 2090 * actually issue a write command for read-only 2091 * channels. 2092 */ 2093 2094 /* 2095 * The first channel must be set 2096 * (for ease of programming). 2097 */ 2098 if (ch_bits & 1) 2099 build_feature_ctl(state, _ftr, ch_bits, control, 2100 &iterm, unitid, ch_read_only); 2101 if (uac_v2v3_control_is_readable(master_bits, control)) 2102 build_feature_ctl(state, _ftr, 0, control, 2103 &iterm, unitid, 2104 !uac_v2v3_control_is_writeable(master_bits, 2105 control)); 2106 } 2107 } 2108 2109 return 0; 2110 } 2111 2112 /* 2113 * Mixer Unit 2114 */ 2115 2116 /* check whether the given in/out overflows bmMixerControls matrix */ 2117 static bool mixer_bitmap_overflow(struct uac_mixer_unit_descriptor *desc, 2118 int protocol, int num_ins, int num_outs) 2119 { 2120 u8 *hdr = (u8 *)desc; 2121 u8 *c = uac_mixer_unit_bmControls(desc, protocol); 2122 size_t rest; /* remaining bytes after bmMixerControls */ 2123 2124 switch (protocol) { 2125 case UAC_VERSION_1: 2126 default: 2127 rest = 1; /* iMixer */ 2128 break; 2129 case UAC_VERSION_2: 2130 rest = 2; /* bmControls + iMixer */ 2131 break; 2132 case UAC_VERSION_3: 2133 rest = 6; /* bmControls + wMixerDescrStr */ 2134 break; 2135 } 2136 2137 /* overflow? */ 2138 return c + (num_ins * num_outs + 7) / 8 + rest > hdr + hdr[0]; 2139 } 2140 2141 /* 2142 * build a mixer unit control 2143 * 2144 * the callbacks are identical with feature unit. 2145 * input channel number (zero based) is given in control field instead. 2146 */ 2147 static void build_mixer_unit_ctl(struct mixer_build *state, 2148 struct uac_mixer_unit_descriptor *desc, 2149 int in_pin, int in_ch, int num_outs, 2150 int unitid, struct usb_audio_term *iterm) 2151 { 2152 struct usb_mixer_elem_info *cval; 2153 unsigned int i, len; 2154 struct snd_kcontrol *kctl; 2155 const struct usbmix_name_map *map; 2156 2157 map = find_map(state->map, unitid, 0); 2158 if (check_ignored_ctl(map)) 2159 return; 2160 2161 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 2162 if (!cval) 2163 return; 2164 2165 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 2166 cval->control = in_ch + 1; /* based on 1 */ 2167 cval->val_type = USB_MIXER_S16; 2168 for (i = 0; i < num_outs; i++) { 2169 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); 2170 2171 if (check_matrix_bitmap(c, in_ch, i, num_outs)) { 2172 cval->cmask |= (1 << i); 2173 cval->channels++; 2174 } 2175 } 2176 2177 /* get min/max values */ 2178 get_min_max(cval, 0); 2179 2180 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 2181 if (!kctl) { 2182 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 2183 usb_mixer_elem_info_free(cval); 2184 return; 2185 } 2186 kctl->private_free = snd_usb_mixer_elem_free; 2187 2188 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 2189 if (!len) 2190 len = get_term_name(state->chip, iterm, kctl->id.name, 2191 sizeof(kctl->id.name), 0); 2192 if (!len) 2193 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1); 2194 append_ctl_name(kctl, " Volume"); 2195 2196 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n", 2197 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max); 2198 snd_usb_mixer_add_control(&cval->head, kctl); 2199 } 2200 2201 static int parse_audio_input_terminal(struct mixer_build *state, int unitid, 2202 void *raw_desc) 2203 { 2204 struct usb_audio_term iterm; 2205 unsigned int control, bmctls, term_id; 2206 2207 if (state->mixer->protocol == UAC_VERSION_2) { 2208 struct uac2_input_terminal_descriptor *d_v2 = raw_desc; 2209 control = UAC2_TE_CONNECTOR; 2210 term_id = d_v2->bTerminalID; 2211 bmctls = le16_to_cpu(d_v2->bmControls); 2212 } else if (state->mixer->protocol == UAC_VERSION_3) { 2213 struct uac3_input_terminal_descriptor *d_v3 = raw_desc; 2214 control = UAC3_TE_INSERTION; 2215 term_id = d_v3->bTerminalID; 2216 bmctls = le32_to_cpu(d_v3->bmControls); 2217 } else { 2218 return 0; /* UAC1. No Insertion control */ 2219 } 2220 2221 check_input_term(state, term_id, &iterm); 2222 2223 /* Check for jack detection. */ 2224 if ((iterm.type & 0xff00) != 0x0100 && 2225 uac_v2v3_control_is_readable(bmctls, control)) 2226 build_connector_control(state->mixer, state->map, &iterm, true); 2227 2228 return 0; 2229 } 2230 2231 /* 2232 * parse a mixer unit 2233 */ 2234 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, 2235 void *raw_desc) 2236 { 2237 struct uac_mixer_unit_descriptor *desc = raw_desc; 2238 struct usb_audio_term iterm; 2239 int input_pins, num_ins, num_outs; 2240 int pin, ich, err; 2241 2242 err = uac_mixer_unit_get_channels(state, desc); 2243 if (err < 0) { 2244 usb_audio_err(state->chip, 2245 "invalid MIXER UNIT descriptor %d\n", 2246 unitid); 2247 return err; 2248 } 2249 2250 num_outs = err; 2251 input_pins = desc->bNrInPins; 2252 2253 num_ins = 0; 2254 ich = 0; 2255 for (pin = 0; pin < input_pins; pin++) { 2256 err = parse_audio_unit(state, desc->baSourceID[pin]); 2257 if (err < 0) 2258 continue; 2259 /* no bmControls field (e.g. Maya44) -> ignore */ 2260 if (!num_outs) 2261 continue; 2262 err = check_input_term(state, desc->baSourceID[pin], &iterm); 2263 if (err < 0) 2264 return err; 2265 num_ins += iterm.channels; 2266 if (mixer_bitmap_overflow(desc, state->mixer->protocol, 2267 num_ins, num_outs)) 2268 break; 2269 for (; ich < num_ins; ich++) { 2270 int och, ich_has_controls = 0; 2271 2272 for (och = 0; och < num_outs; och++) { 2273 __u8 *c = uac_mixer_unit_bmControls(desc, 2274 state->mixer->protocol); 2275 2276 if (check_matrix_bitmap(c, ich, och, num_outs)) { 2277 ich_has_controls = 1; 2278 break; 2279 } 2280 } 2281 if (ich_has_controls) 2282 build_mixer_unit_ctl(state, desc, pin, ich, num_outs, 2283 unitid, &iterm); 2284 } 2285 } 2286 return 0; 2287 } 2288 2289 /* 2290 * Processing Unit / Extension Unit 2291 */ 2292 2293 /* get callback for processing/extension unit */ 2294 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, 2295 struct snd_ctl_elem_value *ucontrol) 2296 { 2297 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2298 int err, val; 2299 2300 err = get_cur_ctl_value(cval, cval->control << 8, &val); 2301 if (err < 0) { 2302 ucontrol->value.integer.value[0] = cval->min; 2303 return filter_error(cval, err); 2304 } 2305 val = get_relative_value(cval, val); 2306 ucontrol->value.integer.value[0] = val; 2307 return 0; 2308 } 2309 2310 /* put callback for processing/extension unit */ 2311 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, 2312 struct snd_ctl_elem_value *ucontrol) 2313 { 2314 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2315 int val, oval, err; 2316 2317 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 2318 if (err < 0) 2319 return filter_error(cval, err); 2320 val = ucontrol->value.integer.value[0]; 2321 val = get_abs_value(cval, val); 2322 if (val != oval) { 2323 set_cur_ctl_value(cval, cval->control << 8, val); 2324 return 1; 2325 } 2326 return 0; 2327 } 2328 2329 /* alsa control interface for processing/extension unit */ 2330 static const struct snd_kcontrol_new mixer_procunit_ctl = { 2331 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 2332 .name = "", /* will be filled later */ 2333 .info = mixer_ctl_feature_info, 2334 .get = mixer_ctl_procunit_get, 2335 .put = mixer_ctl_procunit_put, 2336 }; 2337 2338 /* 2339 * predefined data for processing units 2340 */ 2341 struct procunit_value_info { 2342 int control; 2343 const char *suffix; 2344 int val_type; 2345 int min_value; 2346 }; 2347 2348 struct procunit_info { 2349 int type; 2350 char *name; 2351 const struct procunit_value_info *values; 2352 }; 2353 2354 static const struct procunit_value_info undefined_proc_info[] = { 2355 { 0x00, "Control Undefined", 0 }, 2356 { 0 } 2357 }; 2358 2359 static const struct procunit_value_info updown_proc_info[] = { 2360 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 2361 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 2362 { 0 } 2363 }; 2364 static const struct procunit_value_info prologic_proc_info[] = { 2365 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 2366 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 2367 { 0 } 2368 }; 2369 static const struct procunit_value_info threed_enh_proc_info[] = { 2370 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 2371 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 }, 2372 { 0 } 2373 }; 2374 static const struct procunit_value_info reverb_proc_info[] = { 2375 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 2376 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, 2377 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 }, 2378 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 }, 2379 { 0 } 2380 }; 2381 static const struct procunit_value_info chorus_proc_info[] = { 2382 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 2383 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, 2384 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, 2385 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, 2386 { 0 } 2387 }; 2388 static const struct procunit_value_info dcr_proc_info[] = { 2389 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 2390 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 }, 2391 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 }, 2392 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, 2393 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 }, 2394 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 }, 2395 { 0 } 2396 }; 2397 2398 static const struct procunit_info procunits[] = { 2399 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info }, 2400 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info }, 2401 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info }, 2402 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info }, 2403 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info }, 2404 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info }, 2405 { 0 }, 2406 }; 2407 2408 static const struct procunit_value_info uac3_updown_proc_info[] = { 2409 { UAC3_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 2410 { 0 } 2411 }; 2412 static const struct procunit_value_info uac3_stereo_ext_proc_info[] = { 2413 { UAC3_EXT_WIDTH_CONTROL, "Width Control", USB_MIXER_U8 }, 2414 { 0 } 2415 }; 2416 2417 static const struct procunit_info uac3_procunits[] = { 2418 { UAC3_PROCESS_UP_DOWNMIX, "Up Down", uac3_updown_proc_info }, 2419 { UAC3_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", uac3_stereo_ext_proc_info }, 2420 { UAC3_PROCESS_MULTI_FUNCTION, "Multi-Function", undefined_proc_info }, 2421 { 0 }, 2422 }; 2423 2424 /* 2425 * predefined data for extension units 2426 */ 2427 static const struct procunit_value_info clock_rate_xu_info[] = { 2428 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, 2429 { 0 } 2430 }; 2431 static const struct procunit_value_info clock_source_xu_info[] = { 2432 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, 2433 { 0 } 2434 }; 2435 static const struct procunit_value_info spdif_format_xu_info[] = { 2436 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, 2437 { 0 } 2438 }; 2439 static const struct procunit_value_info soft_limit_xu_info[] = { 2440 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, 2441 { 0 } 2442 }; 2443 static const struct procunit_info extunits[] = { 2444 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info }, 2445 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info }, 2446 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info }, 2447 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info }, 2448 { 0 } 2449 }; 2450 2451 /* 2452 * build a processing/extension unit 2453 */ 2454 static int build_audio_procunit(struct mixer_build *state, int unitid, 2455 void *raw_desc, const struct procunit_info *list, 2456 bool extension_unit) 2457 { 2458 struct uac_processing_unit_descriptor *desc = raw_desc; 2459 int num_ins; 2460 struct usb_mixer_elem_info *cval; 2461 struct snd_kcontrol *kctl; 2462 int i, err, nameid, type, len, val; 2463 const struct procunit_info *info; 2464 const struct procunit_value_info *valinfo; 2465 const struct usbmix_name_map *map; 2466 static const struct procunit_value_info default_value_info[] = { 2467 { 0x01, "Switch", USB_MIXER_BOOLEAN }, 2468 { 0 } 2469 }; 2470 static const struct procunit_info default_info = { 2471 0, NULL, default_value_info 2472 }; 2473 const char *name = extension_unit ? 2474 "Extension Unit" : "Processing Unit"; 2475 2476 num_ins = desc->bNrInPins; 2477 for (i = 0; i < num_ins; i++) { 2478 err = parse_audio_unit(state, desc->baSourceID[i]); 2479 if (err < 0) 2480 return err; 2481 } 2482 2483 type = le16_to_cpu(desc->wProcessType); 2484 for (info = list; info && info->type; info++) 2485 if (info->type == type) 2486 break; 2487 if (!info || !info->type) 2488 info = &default_info; 2489 2490 for (valinfo = info->values; valinfo->control; valinfo++) { 2491 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol); 2492 2493 if (state->mixer->protocol == UAC_VERSION_1) { 2494 if (!(controls[valinfo->control / 8] & 2495 (1 << ((valinfo->control % 8) - 1)))) 2496 continue; 2497 } else { /* UAC_VERSION_2/3 */ 2498 if (!uac_v2v3_control_is_readable(controls[valinfo->control / 8], 2499 valinfo->control)) 2500 continue; 2501 } 2502 2503 map = find_map(state->map, unitid, valinfo->control); 2504 if (check_ignored_ctl(map)) 2505 continue; 2506 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 2507 if (!cval) 2508 return -ENOMEM; 2509 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 2510 cval->control = valinfo->control; 2511 cval->val_type = valinfo->val_type; 2512 cval->channels = 1; 2513 2514 if (state->mixer->protocol > UAC_VERSION_1 && 2515 !uac_v2v3_control_is_writeable(controls[valinfo->control / 8], 2516 valinfo->control)) 2517 cval->master_readonly = 1; 2518 2519 /* get min/max values */ 2520 switch (type) { 2521 case UAC_PROCESS_UP_DOWNMIX: { 2522 bool mode_sel = false; 2523 2524 switch (state->mixer->protocol) { 2525 case UAC_VERSION_1: 2526 case UAC_VERSION_2: 2527 default: 2528 if (cval->control == UAC_UD_MODE_SELECT) 2529 mode_sel = true; 2530 break; 2531 case UAC_VERSION_3: 2532 if (cval->control == UAC3_UD_MODE_SELECT) 2533 mode_sel = true; 2534 break; 2535 } 2536 2537 if (mode_sel) { 2538 __u8 *control_spec = uac_processing_unit_specific(desc, 2539 state->mixer->protocol); 2540 cval->min = 1; 2541 cval->max = control_spec[0]; 2542 cval->res = 1; 2543 cval->initialized = 1; 2544 break; 2545 } 2546 2547 get_min_max(cval, valinfo->min_value); 2548 break; 2549 } 2550 case USB_XU_CLOCK_RATE: 2551 /* 2552 * E-Mu USB 0404/0202/TrackerPre/0204 2553 * samplerate control quirk 2554 */ 2555 cval->min = 0; 2556 cval->max = 5; 2557 cval->res = 1; 2558 cval->initialized = 1; 2559 break; 2560 default: 2561 get_min_max(cval, valinfo->min_value); 2562 break; 2563 } 2564 2565 err = get_cur_ctl_value(cval, cval->control << 8, &val); 2566 if (err < 0) { 2567 usb_mixer_elem_info_free(cval); 2568 return -EINVAL; 2569 } 2570 2571 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); 2572 if (!kctl) { 2573 usb_mixer_elem_info_free(cval); 2574 return -ENOMEM; 2575 } 2576 kctl->private_free = snd_usb_mixer_elem_free; 2577 2578 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) { 2579 /* nothing */ ; 2580 } else if (info->name) { 2581 strscpy(kctl->id.name, info->name, sizeof(kctl->id.name)); 2582 } else { 2583 if (extension_unit) 2584 nameid = uac_extension_unit_iExtension(desc, state->mixer->protocol); 2585 else 2586 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); 2587 len = 0; 2588 if (nameid) 2589 len = snd_usb_copy_string_desc(state->chip, 2590 nameid, 2591 kctl->id.name, 2592 sizeof(kctl->id.name)); 2593 if (!len) 2594 strscpy(kctl->id.name, name, sizeof(kctl->id.name)); 2595 } 2596 append_ctl_name(kctl, " "); 2597 append_ctl_name(kctl, valinfo->suffix); 2598 2599 usb_audio_dbg(state->chip, 2600 "[%d] PU [%s] ch = %d, val = %d/%d\n", 2601 cval->head.id, kctl->id.name, cval->channels, 2602 cval->min, cval->max); 2603 2604 err = snd_usb_mixer_add_control(&cval->head, kctl); 2605 if (err < 0) 2606 return err; 2607 } 2608 return 0; 2609 } 2610 2611 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, 2612 void *raw_desc) 2613 { 2614 switch (state->mixer->protocol) { 2615 case UAC_VERSION_1: 2616 case UAC_VERSION_2: 2617 default: 2618 return build_audio_procunit(state, unitid, raw_desc, 2619 procunits, false); 2620 case UAC_VERSION_3: 2621 return build_audio_procunit(state, unitid, raw_desc, 2622 uac3_procunits, false); 2623 } 2624 } 2625 2626 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, 2627 void *raw_desc) 2628 { 2629 /* 2630 * Note that we parse extension units with processing unit descriptors. 2631 * That's ok as the layout is the same. 2632 */ 2633 return build_audio_procunit(state, unitid, raw_desc, extunits, true); 2634 } 2635 2636 /* 2637 * Selector Unit 2638 */ 2639 2640 /* 2641 * info callback for selector unit 2642 * use an enumerator type for routing 2643 */ 2644 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, 2645 struct snd_ctl_elem_info *uinfo) 2646 { 2647 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2648 const char **itemlist = (const char **)kcontrol->private_value; 2649 2650 if (snd_BUG_ON(!itemlist)) 2651 return -EINVAL; 2652 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist); 2653 } 2654 2655 /* get callback for selector unit */ 2656 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, 2657 struct snd_ctl_elem_value *ucontrol) 2658 { 2659 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2660 int val, err; 2661 2662 err = get_cur_ctl_value(cval, cval->control << 8, &val); 2663 if (err < 0) { 2664 ucontrol->value.enumerated.item[0] = 0; 2665 return filter_error(cval, err); 2666 } 2667 val = get_relative_value(cval, val); 2668 ucontrol->value.enumerated.item[0] = val; 2669 return 0; 2670 } 2671 2672 /* put callback for selector unit */ 2673 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, 2674 struct snd_ctl_elem_value *ucontrol) 2675 { 2676 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2677 int val, oval, err; 2678 2679 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 2680 if (err < 0) 2681 return filter_error(cval, err); 2682 val = ucontrol->value.enumerated.item[0]; 2683 val = get_abs_value(cval, val); 2684 if (val != oval) { 2685 set_cur_ctl_value(cval, cval->control << 8, val); 2686 return 1; 2687 } 2688 return 0; 2689 } 2690 2691 /* alsa control interface for selector unit */ 2692 static const struct snd_kcontrol_new mixer_selectunit_ctl = { 2693 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 2694 .name = "", /* will be filled later */ 2695 .info = mixer_ctl_selector_info, 2696 .get = mixer_ctl_selector_get, 2697 .put = mixer_ctl_selector_put, 2698 }; 2699 2700 /* 2701 * private free callback. 2702 * free both private_data and private_value 2703 */ 2704 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) 2705 { 2706 int i, num_ins = 0; 2707 2708 if (kctl->private_data) { 2709 struct usb_mixer_elem_info *cval = kctl->private_data; 2710 num_ins = cval->max; 2711 usb_mixer_elem_info_free(cval); 2712 kctl->private_data = NULL; 2713 } 2714 if (kctl->private_value) { 2715 char **itemlist = (char **)kctl->private_value; 2716 for (i = 0; i < num_ins; i++) 2717 kfree(itemlist[i]); 2718 kfree(itemlist); 2719 kctl->private_value = 0; 2720 } 2721 } 2722 2723 /* 2724 * parse a selector unit 2725 */ 2726 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, 2727 void *raw_desc) 2728 { 2729 struct uac_selector_unit_descriptor *desc = raw_desc; 2730 unsigned int i, nameid, len; 2731 int err; 2732 struct usb_mixer_elem_info *cval; 2733 struct snd_kcontrol *kctl; 2734 const struct usbmix_name_map *map; 2735 char **namelist; 2736 2737 for (i = 0; i < desc->bNrInPins; i++) { 2738 err = parse_audio_unit(state, desc->baSourceID[i]); 2739 if (err < 0) 2740 return err; 2741 } 2742 2743 if (desc->bNrInPins == 1) /* only one ? nonsense! */ 2744 return 0; 2745 2746 map = find_map(state->map, unitid, 0); 2747 if (check_ignored_ctl(map)) 2748 return 0; 2749 2750 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 2751 if (!cval) 2752 return -ENOMEM; 2753 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 2754 cval->val_type = USB_MIXER_U8; 2755 cval->channels = 1; 2756 cval->min = 1; 2757 cval->max = desc->bNrInPins; 2758 cval->res = 1; 2759 cval->initialized = 1; 2760 2761 switch (state->mixer->protocol) { 2762 case UAC_VERSION_1: 2763 default: 2764 cval->control = 0; 2765 break; 2766 case UAC_VERSION_2: 2767 case UAC_VERSION_3: 2768 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR || 2769 desc->bDescriptorSubtype == UAC3_CLOCK_SELECTOR) 2770 cval->control = UAC2_CX_CLOCK_SELECTOR; 2771 else /* UAC2/3_SELECTOR_UNIT */ 2772 cval->control = UAC2_SU_SELECTOR; 2773 break; 2774 } 2775 2776 namelist = kcalloc(desc->bNrInPins, sizeof(char *), GFP_KERNEL); 2777 if (!namelist) { 2778 err = -ENOMEM; 2779 goto error_cval; 2780 } 2781 #define MAX_ITEM_NAME_LEN 64 2782 for (i = 0; i < desc->bNrInPins; i++) { 2783 struct usb_audio_term iterm; 2784 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); 2785 if (!namelist[i]) { 2786 err = -ENOMEM; 2787 goto error_name; 2788 } 2789 len = check_mapped_selector_name(state, unitid, i, namelist[i], 2790 MAX_ITEM_NAME_LEN); 2791 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0) 2792 len = get_term_name(state->chip, &iterm, namelist[i], 2793 MAX_ITEM_NAME_LEN, 0); 2794 if (! len) 2795 sprintf(namelist[i], "Input %u", i); 2796 } 2797 2798 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); 2799 if (! kctl) { 2800 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 2801 err = -ENOMEM; 2802 goto error_name; 2803 } 2804 kctl->private_value = (unsigned long)namelist; 2805 kctl->private_free = usb_mixer_selector_elem_free; 2806 2807 /* check the static mapping table at first */ 2808 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 2809 if (!len) { 2810 /* no mapping ? */ 2811 switch (state->mixer->protocol) { 2812 case UAC_VERSION_1: 2813 case UAC_VERSION_2: 2814 default: 2815 /* if iSelector is given, use it */ 2816 nameid = uac_selector_unit_iSelector(desc); 2817 if (nameid) 2818 len = snd_usb_copy_string_desc(state->chip, 2819 nameid, kctl->id.name, 2820 sizeof(kctl->id.name)); 2821 break; 2822 case UAC_VERSION_3: 2823 /* TODO: Class-Specific strings not yet supported */ 2824 break; 2825 } 2826 2827 /* ... or pick up the terminal name at next */ 2828 if (!len) 2829 len = get_term_name(state->chip, &state->oterm, 2830 kctl->id.name, sizeof(kctl->id.name), 0); 2831 /* ... or use the fixed string "USB" as the last resort */ 2832 if (!len) 2833 strscpy(kctl->id.name, "USB", sizeof(kctl->id.name)); 2834 2835 /* and add the proper suffix */ 2836 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR || 2837 desc->bDescriptorSubtype == UAC3_CLOCK_SELECTOR) 2838 append_ctl_name(kctl, " Clock Source"); 2839 else if ((state->oterm.type & 0xff00) == 0x0100) 2840 append_ctl_name(kctl, " Capture Source"); 2841 else 2842 append_ctl_name(kctl, " Playback Source"); 2843 } 2844 2845 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n", 2846 cval->head.id, kctl->id.name, desc->bNrInPins); 2847 return snd_usb_mixer_add_control(&cval->head, kctl); 2848 2849 error_name: 2850 for (i = 0; i < desc->bNrInPins; i++) 2851 kfree(namelist[i]); 2852 kfree(namelist); 2853 error_cval: 2854 usb_mixer_elem_info_free(cval); 2855 return err; 2856 } 2857 2858 /* 2859 * parse an audio unit recursively 2860 */ 2861 2862 static int parse_audio_unit(struct mixer_build *state, int unitid) 2863 { 2864 unsigned char *p1; 2865 int protocol = state->mixer->protocol; 2866 2867 if (test_and_set_bit(unitid, state->unitbitmap)) 2868 return 0; /* the unit already visited */ 2869 2870 p1 = find_audio_control_unit(state, unitid); 2871 if (!p1) { 2872 usb_audio_err(state->chip, "unit %d not found!\n", unitid); 2873 return -EINVAL; 2874 } 2875 2876 if (!snd_usb_validate_audio_desc(p1, protocol)) { 2877 usb_audio_dbg(state->chip, "invalid unit %d\n", unitid); 2878 return 0; /* skip invalid unit */ 2879 } 2880 2881 switch (PTYPE(protocol, p1[2])) { 2882 case PTYPE(UAC_VERSION_1, UAC_INPUT_TERMINAL): 2883 case PTYPE(UAC_VERSION_2, UAC_INPUT_TERMINAL): 2884 case PTYPE(UAC_VERSION_3, UAC_INPUT_TERMINAL): 2885 return parse_audio_input_terminal(state, unitid, p1); 2886 case PTYPE(UAC_VERSION_1, UAC_MIXER_UNIT): 2887 case PTYPE(UAC_VERSION_2, UAC_MIXER_UNIT): 2888 case PTYPE(UAC_VERSION_3, UAC3_MIXER_UNIT): 2889 return parse_audio_mixer_unit(state, unitid, p1); 2890 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SOURCE): 2891 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SOURCE): 2892 return parse_clock_source_unit(state, unitid, p1); 2893 case PTYPE(UAC_VERSION_1, UAC_SELECTOR_UNIT): 2894 case PTYPE(UAC_VERSION_2, UAC_SELECTOR_UNIT): 2895 case PTYPE(UAC_VERSION_3, UAC3_SELECTOR_UNIT): 2896 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SELECTOR): 2897 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SELECTOR): 2898 return parse_audio_selector_unit(state, unitid, p1); 2899 case PTYPE(UAC_VERSION_1, UAC_FEATURE_UNIT): 2900 case PTYPE(UAC_VERSION_2, UAC_FEATURE_UNIT): 2901 case PTYPE(UAC_VERSION_3, UAC3_FEATURE_UNIT): 2902 return parse_audio_feature_unit(state, unitid, p1); 2903 case PTYPE(UAC_VERSION_1, UAC1_PROCESSING_UNIT): 2904 case PTYPE(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2): 2905 case PTYPE(UAC_VERSION_3, UAC3_PROCESSING_UNIT): 2906 return parse_audio_processing_unit(state, unitid, p1); 2907 case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT): 2908 case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2): 2909 case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT): 2910 return parse_audio_extension_unit(state, unitid, p1); 2911 case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT): 2912 case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT): 2913 return 0; /* FIXME - effect units not implemented yet */ 2914 default: 2915 usb_audio_err(state->chip, 2916 "unit %u: unexpected type 0x%02x\n", 2917 unitid, p1[2]); 2918 return -EINVAL; 2919 } 2920 } 2921 2922 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer) 2923 { 2924 /* kill pending URBs */ 2925 snd_usb_mixer_disconnect(mixer); 2926 2927 kfree(mixer->id_elems); 2928 if (mixer->urb) { 2929 kfree(mixer->urb->transfer_buffer); 2930 usb_free_urb(mixer->urb); 2931 } 2932 usb_free_urb(mixer->rc_urb); 2933 kfree(mixer->rc_setup_packet); 2934 kfree(mixer); 2935 } 2936 2937 static int snd_usb_mixer_dev_free(struct snd_device *device) 2938 { 2939 struct usb_mixer_interface *mixer = device->device_data; 2940 snd_usb_mixer_free(mixer); 2941 return 0; 2942 } 2943 2944 /* UAC3 predefined channels configuration */ 2945 struct uac3_badd_profile { 2946 int subclass; 2947 const char *name; 2948 int c_chmask; /* capture channels mask */ 2949 int p_chmask; /* playback channels mask */ 2950 int st_chmask; /* side tone mixing channel mask */ 2951 }; 2952 2953 static const struct uac3_badd_profile uac3_badd_profiles[] = { 2954 { 2955 /* 2956 * BAIF, BAOF or combination of both 2957 * IN: Mono or Stereo cfg, Mono alt possible 2958 * OUT: Mono or Stereo cfg, Mono alt possible 2959 */ 2960 .subclass = UAC3_FUNCTION_SUBCLASS_GENERIC_IO, 2961 .name = "GENERIC IO", 2962 .c_chmask = -1, /* dynamic channels */ 2963 .p_chmask = -1, /* dynamic channels */ 2964 }, 2965 { 2966 /* BAOF; Stereo only cfg, Mono alt possible */ 2967 .subclass = UAC3_FUNCTION_SUBCLASS_HEADPHONE, 2968 .name = "HEADPHONE", 2969 .p_chmask = 3, 2970 }, 2971 { 2972 /* BAOF; Mono or Stereo cfg, Mono alt possible */ 2973 .subclass = UAC3_FUNCTION_SUBCLASS_SPEAKER, 2974 .name = "SPEAKER", 2975 .p_chmask = -1, /* dynamic channels */ 2976 }, 2977 { 2978 /* BAIF; Mono or Stereo cfg, Mono alt possible */ 2979 .subclass = UAC3_FUNCTION_SUBCLASS_MICROPHONE, 2980 .name = "MICROPHONE", 2981 .c_chmask = -1, /* dynamic channels */ 2982 }, 2983 { 2984 /* 2985 * BAIOF topology 2986 * IN: Mono only 2987 * OUT: Mono or Stereo cfg, Mono alt possible 2988 */ 2989 .subclass = UAC3_FUNCTION_SUBCLASS_HEADSET, 2990 .name = "HEADSET", 2991 .c_chmask = 1, 2992 .p_chmask = -1, /* dynamic channels */ 2993 .st_chmask = 1, 2994 }, 2995 { 2996 /* BAIOF; IN: Mono only; OUT: Stereo only, Mono alt possible */ 2997 .subclass = UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER, 2998 .name = "HEADSET ADAPTER", 2999 .c_chmask = 1, 3000 .p_chmask = 3, 3001 .st_chmask = 1, 3002 }, 3003 { 3004 /* BAIF + BAOF; IN: Mono only; OUT: Mono only */ 3005 .subclass = UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE, 3006 .name = "SPEAKERPHONE", 3007 .c_chmask = 1, 3008 .p_chmask = 1, 3009 }, 3010 { 0 } /* terminator */ 3011 }; 3012 3013 static bool uac3_badd_func_has_valid_channels(struct usb_mixer_interface *mixer, 3014 const struct uac3_badd_profile *f, 3015 int c_chmask, int p_chmask) 3016 { 3017 /* 3018 * If both playback/capture channels are dynamic, make sure 3019 * at least one channel is present 3020 */ 3021 if (f->c_chmask < 0 && f->p_chmask < 0) { 3022 if (!c_chmask && !p_chmask) { 3023 usb_audio_warn(mixer->chip, "BAAD %s: no channels?", 3024 f->name); 3025 return false; 3026 } 3027 return true; 3028 } 3029 3030 if ((f->c_chmask < 0 && !c_chmask) || 3031 (f->c_chmask >= 0 && f->c_chmask != c_chmask)) { 3032 usb_audio_warn(mixer->chip, "BAAD %s c_chmask mismatch", 3033 f->name); 3034 return false; 3035 } 3036 if ((f->p_chmask < 0 && !p_chmask) || 3037 (f->p_chmask >= 0 && f->p_chmask != p_chmask)) { 3038 usb_audio_warn(mixer->chip, "BAAD %s p_chmask mismatch", 3039 f->name); 3040 return false; 3041 } 3042 return true; 3043 } 3044 3045 /* 3046 * create mixer controls for UAC3 BADD profiles 3047 * 3048 * UAC3 BADD device doesn't contain CS descriptors thus we will guess everything 3049 * 3050 * BADD device may contain Mixer Unit, which doesn't have any controls, skip it 3051 */ 3052 static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer, 3053 int ctrlif) 3054 { 3055 struct usb_device *dev = mixer->chip->dev; 3056 struct usb_interface_assoc_descriptor *assoc; 3057 int badd_profile = mixer->chip->badd_profile; 3058 const struct uac3_badd_profile *f; 3059 const struct usbmix_ctl_map *map; 3060 int p_chmask = 0, c_chmask = 0, st_chmask = 0; 3061 int i; 3062 3063 assoc = usb_ifnum_to_if(dev, ctrlif)->intf_assoc; 3064 3065 /* Detect BADD capture/playback channels from AS EP descriptors */ 3066 for (i = 0; i < assoc->bInterfaceCount; i++) { 3067 int intf = assoc->bFirstInterface + i; 3068 3069 struct usb_interface *iface; 3070 struct usb_host_interface *alts; 3071 struct usb_interface_descriptor *altsd; 3072 unsigned int maxpacksize; 3073 char dir_in; 3074 int chmask, num; 3075 3076 if (intf == ctrlif) 3077 continue; 3078 3079 iface = usb_ifnum_to_if(dev, intf); 3080 if (!iface) 3081 continue; 3082 3083 num = iface->num_altsetting; 3084 3085 if (num < 2) 3086 return -EINVAL; 3087 3088 /* 3089 * The number of Channels in an AudioStreaming interface 3090 * and the audio sample bit resolution (16 bits or 24 3091 * bits) can be derived from the wMaxPacketSize field in 3092 * the Standard AS Audio Data Endpoint descriptor in 3093 * Alternate Setting 1 3094 */ 3095 alts = &iface->altsetting[1]; 3096 altsd = get_iface_desc(alts); 3097 3098 if (altsd->bNumEndpoints < 1) 3099 return -EINVAL; 3100 3101 /* check direction */ 3102 dir_in = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); 3103 maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); 3104 3105 switch (maxpacksize) { 3106 default: 3107 usb_audio_err(mixer->chip, 3108 "incorrect wMaxPacketSize 0x%x for BADD profile\n", 3109 maxpacksize); 3110 return -EINVAL; 3111 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16: 3112 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16: 3113 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24: 3114 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24: 3115 chmask = 1; 3116 break; 3117 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16: 3118 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16: 3119 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24: 3120 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24: 3121 chmask = 3; 3122 break; 3123 } 3124 3125 if (dir_in) 3126 c_chmask = chmask; 3127 else 3128 p_chmask = chmask; 3129 } 3130 3131 usb_audio_dbg(mixer->chip, 3132 "UAC3 BADD profile 0x%x: detected c_chmask=%d p_chmask=%d\n", 3133 badd_profile, c_chmask, p_chmask); 3134 3135 /* check the mapping table */ 3136 for (map = uac3_badd_usbmix_ctl_maps; map->id; map++) { 3137 if (map->id == badd_profile) 3138 break; 3139 } 3140 3141 if (!map->id) 3142 return -EINVAL; 3143 3144 for (f = uac3_badd_profiles; f->name; f++) { 3145 if (badd_profile == f->subclass) 3146 break; 3147 } 3148 if (!f->name) 3149 return -EINVAL; 3150 if (!uac3_badd_func_has_valid_channels(mixer, f, c_chmask, p_chmask)) 3151 return -EINVAL; 3152 st_chmask = f->st_chmask; 3153 3154 /* Playback */ 3155 if (p_chmask) { 3156 /* Master channel, always writable */ 3157 build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE, 3158 UAC3_BADD_FU_ID2, map->map); 3159 /* Mono/Stereo volume channels, always writable */ 3160 build_feature_ctl_badd(mixer, p_chmask, UAC_FU_VOLUME, 3161 UAC3_BADD_FU_ID2, map->map); 3162 } 3163 3164 /* Capture */ 3165 if (c_chmask) { 3166 /* Master channel, always writable */ 3167 build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE, 3168 UAC3_BADD_FU_ID5, map->map); 3169 /* Mono/Stereo volume channels, always writable */ 3170 build_feature_ctl_badd(mixer, c_chmask, UAC_FU_VOLUME, 3171 UAC3_BADD_FU_ID5, map->map); 3172 } 3173 3174 /* Side tone-mixing */ 3175 if (st_chmask) { 3176 /* Master channel, always writable */ 3177 build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE, 3178 UAC3_BADD_FU_ID7, map->map); 3179 /* Mono volume channel, always writable */ 3180 build_feature_ctl_badd(mixer, 1, UAC_FU_VOLUME, 3181 UAC3_BADD_FU_ID7, map->map); 3182 } 3183 3184 /* Insertion Control */ 3185 if (f->subclass == UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER) { 3186 struct usb_audio_term iterm, oterm; 3187 3188 /* Input Term - Insertion control */ 3189 memset(&iterm, 0, sizeof(iterm)); 3190 iterm.id = UAC3_BADD_IT_ID4; 3191 iterm.type = UAC_BIDIR_TERMINAL_HEADSET; 3192 build_connector_control(mixer, map->map, &iterm, true); 3193 3194 /* Output Term - Insertion control */ 3195 memset(&oterm, 0, sizeof(oterm)); 3196 oterm.id = UAC3_BADD_OT_ID3; 3197 oterm.type = UAC_BIDIR_TERMINAL_HEADSET; 3198 build_connector_control(mixer, map->map, &oterm, false); 3199 } 3200 3201 return 0; 3202 } 3203 3204 /* 3205 * create mixer controls 3206 * 3207 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers 3208 */ 3209 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) 3210 { 3211 struct mixer_build state; 3212 int err; 3213 const struct usbmix_ctl_map *map; 3214 void *p; 3215 3216 memset(&state, 0, sizeof(state)); 3217 state.chip = mixer->chip; 3218 state.mixer = mixer; 3219 state.buffer = mixer->hostif->extra; 3220 state.buflen = mixer->hostif->extralen; 3221 3222 /* check the mapping table */ 3223 for (map = usbmix_ctl_maps; map->id; map++) { 3224 if (map->id == state.chip->usb_id) { 3225 state.map = map->map; 3226 state.selector_map = map->selector_map; 3227 mixer->connector_map = map->connector_map; 3228 break; 3229 } 3230 } 3231 3232 p = NULL; 3233 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, 3234 mixer->hostif->extralen, 3235 p, UAC_OUTPUT_TERMINAL)) != NULL) { 3236 if (!snd_usb_validate_audio_desc(p, mixer->protocol)) 3237 continue; /* skip invalid descriptor */ 3238 3239 if (mixer->protocol == UAC_VERSION_1) { 3240 struct uac1_output_terminal_descriptor *desc = p; 3241 3242 /* mark terminal ID as visited */ 3243 set_bit(desc->bTerminalID, state.unitbitmap); 3244 state.oterm.id = desc->bTerminalID; 3245 state.oterm.type = le16_to_cpu(desc->wTerminalType); 3246 state.oterm.name = desc->iTerminal; 3247 err = parse_audio_unit(&state, desc->bSourceID); 3248 if (err < 0 && err != -EINVAL) 3249 return err; 3250 } else if (mixer->protocol == UAC_VERSION_2) { 3251 struct uac2_output_terminal_descriptor *desc = p; 3252 3253 /* mark terminal ID as visited */ 3254 set_bit(desc->bTerminalID, state.unitbitmap); 3255 state.oterm.id = desc->bTerminalID; 3256 state.oterm.type = le16_to_cpu(desc->wTerminalType); 3257 state.oterm.name = desc->iTerminal; 3258 err = parse_audio_unit(&state, desc->bSourceID); 3259 if (err < 0 && err != -EINVAL) 3260 return err; 3261 3262 /* 3263 * For UAC2, use the same approach to also add the 3264 * clock selectors 3265 */ 3266 err = parse_audio_unit(&state, desc->bCSourceID); 3267 if (err < 0 && err != -EINVAL) 3268 return err; 3269 3270 if ((state.oterm.type & 0xff00) != 0x0100 && 3271 uac_v2v3_control_is_readable(le16_to_cpu(desc->bmControls), 3272 UAC2_TE_CONNECTOR)) { 3273 build_connector_control(state.mixer, state.map, 3274 &state.oterm, false); 3275 } 3276 } else { /* UAC_VERSION_3 */ 3277 struct uac3_output_terminal_descriptor *desc = p; 3278 3279 /* mark terminal ID as visited */ 3280 set_bit(desc->bTerminalID, state.unitbitmap); 3281 state.oterm.id = desc->bTerminalID; 3282 state.oterm.type = le16_to_cpu(desc->wTerminalType); 3283 state.oterm.name = le16_to_cpu(desc->wTerminalDescrStr); 3284 err = parse_audio_unit(&state, desc->bSourceID); 3285 if (err < 0 && err != -EINVAL) 3286 return err; 3287 3288 /* 3289 * For UAC3, use the same approach to also add the 3290 * clock selectors 3291 */ 3292 err = parse_audio_unit(&state, desc->bCSourceID); 3293 if (err < 0 && err != -EINVAL) 3294 return err; 3295 3296 if ((state.oterm.type & 0xff00) != 0x0100 && 3297 uac_v2v3_control_is_readable(le32_to_cpu(desc->bmControls), 3298 UAC3_TE_INSERTION)) { 3299 build_connector_control(state.mixer, state.map, 3300 &state.oterm, false); 3301 } 3302 } 3303 } 3304 3305 return 0; 3306 } 3307 3308 static int delegate_notify(struct usb_mixer_interface *mixer, int unitid, 3309 u8 *control, u8 *channel) 3310 { 3311 const struct usbmix_connector_map *map = mixer->connector_map; 3312 3313 if (!map) 3314 return unitid; 3315 3316 for (; map->id; map++) { 3317 if (map->id == unitid) { 3318 if (control && map->control) 3319 *control = map->control; 3320 if (channel && map->channel) 3321 *channel = map->channel; 3322 return map->delegated_id; 3323 } 3324 } 3325 return unitid; 3326 } 3327 3328 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) 3329 { 3330 struct usb_mixer_elem_list *list; 3331 3332 unitid = delegate_notify(mixer, unitid, NULL, NULL); 3333 3334 for_each_mixer_elem(list, mixer, unitid) { 3335 struct usb_mixer_elem_info *info; 3336 3337 if (!list->is_std_info) 3338 continue; 3339 info = mixer_elem_list_to_info(list); 3340 /* invalidate cache, so the value is read from the device */ 3341 info->cached = 0; 3342 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 3343 &list->kctl->id); 3344 } 3345 } 3346 3347 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer, 3348 struct usb_mixer_elem_list *list) 3349 { 3350 struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list); 3351 static const char * const val_types[] = { 3352 [USB_MIXER_BOOLEAN] = "BOOLEAN", 3353 [USB_MIXER_INV_BOOLEAN] = "INV_BOOLEAN", 3354 [USB_MIXER_S8] = "S8", 3355 [USB_MIXER_U8] = "U8", 3356 [USB_MIXER_S16] = "S16", 3357 [USB_MIXER_U16] = "U16", 3358 [USB_MIXER_S32] = "S32", 3359 [USB_MIXER_U32] = "U32", 3360 [USB_MIXER_BESPOKEN] = "BESPOKEN", 3361 }; 3362 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, " 3363 "channels=%i, type=\"%s\"\n", cval->head.id, 3364 cval->control, cval->cmask, cval->channels, 3365 val_types[cval->val_type]); 3366 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n", 3367 cval->min, cval->max, cval->dBmin, cval->dBmax); 3368 } 3369 3370 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, 3371 struct snd_info_buffer *buffer) 3372 { 3373 struct snd_usb_audio *chip = entry->private_data; 3374 struct usb_mixer_interface *mixer; 3375 struct usb_mixer_elem_list *list; 3376 int unitid; 3377 3378 list_for_each_entry(mixer, &chip->mixer_list, list) { 3379 snd_iprintf(buffer, 3380 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n", 3381 chip->usb_id, mixer_ctrl_intf(mixer), 3382 mixer->ignore_ctl_error); 3383 snd_iprintf(buffer, "Card: %s\n", chip->card->longname); 3384 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { 3385 for_each_mixer_elem(list, mixer, unitid) { 3386 snd_iprintf(buffer, " Unit: %i\n", list->id); 3387 if (list->kctl) 3388 snd_iprintf(buffer, 3389 " Control: name=\"%s\", index=%i\n", 3390 list->kctl->id.name, 3391 list->kctl->id.index); 3392 if (list->dump) 3393 list->dump(buffer, list); 3394 } 3395 } 3396 } 3397 } 3398 3399 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer, 3400 int attribute, int value, int index) 3401 { 3402 struct usb_mixer_elem_list *list; 3403 __u8 unitid = (index >> 8) & 0xff; 3404 __u8 control = (value >> 8) & 0xff; 3405 __u8 channel = value & 0xff; 3406 unsigned int count = 0; 3407 3408 if (channel >= MAX_CHANNELS) { 3409 usb_audio_dbg(mixer->chip, 3410 "%s(): bogus channel number %d\n", 3411 __func__, channel); 3412 return; 3413 } 3414 3415 unitid = delegate_notify(mixer, unitid, &control, &channel); 3416 3417 for_each_mixer_elem(list, mixer, unitid) 3418 count++; 3419 3420 if (count == 0) 3421 return; 3422 3423 for_each_mixer_elem(list, mixer, unitid) { 3424 struct usb_mixer_elem_info *info; 3425 3426 if (!list->kctl) 3427 continue; 3428 if (!list->is_std_info) 3429 continue; 3430 3431 info = mixer_elem_list_to_info(list); 3432 if (count > 1 && info->control != control) 3433 continue; 3434 3435 switch (attribute) { 3436 case UAC2_CS_CUR: 3437 /* invalidate cache, so the value is read from the device */ 3438 if (channel) 3439 info->cached &= ~(1 << channel); 3440 else /* master channel */ 3441 info->cached = 0; 3442 3443 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 3444 &info->head.kctl->id); 3445 break; 3446 3447 case UAC2_CS_RANGE: 3448 /* TODO */ 3449 break; 3450 3451 case UAC2_CS_MEM: 3452 /* TODO */ 3453 break; 3454 3455 default: 3456 usb_audio_dbg(mixer->chip, 3457 "unknown attribute %d in interrupt\n", 3458 attribute); 3459 break; 3460 } /* switch */ 3461 } 3462 } 3463 3464 static void snd_usb_mixer_interrupt(struct urb *urb) 3465 { 3466 struct usb_mixer_interface *mixer = urb->context; 3467 int len = urb->actual_length; 3468 int ustatus = urb->status; 3469 3470 if (ustatus != 0) 3471 goto requeue; 3472 3473 if (mixer->protocol == UAC_VERSION_1) { 3474 struct uac1_status_word *status; 3475 3476 for (status = urb->transfer_buffer; 3477 len >= sizeof(*status); 3478 len -= sizeof(*status), status++) { 3479 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n", 3480 status->bStatusType, 3481 status->bOriginator); 3482 3483 /* ignore any notifications not from the control interface */ 3484 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) != 3485 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF) 3486 continue; 3487 3488 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED) 3489 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator); 3490 else 3491 snd_usb_mixer_notify_id(mixer, status->bOriginator); 3492 } 3493 } else { /* UAC_VERSION_2 */ 3494 struct uac2_interrupt_data_msg *msg; 3495 3496 for (msg = urb->transfer_buffer; 3497 len >= sizeof(*msg); 3498 len -= sizeof(*msg), msg++) { 3499 /* drop vendor specific and endpoint requests */ 3500 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) || 3501 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP)) 3502 continue; 3503 3504 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute, 3505 le16_to_cpu(msg->wValue), 3506 le16_to_cpu(msg->wIndex)); 3507 } 3508 } 3509 3510 requeue: 3511 if (ustatus != -ENOENT && 3512 ustatus != -ECONNRESET && 3513 ustatus != -ESHUTDOWN) { 3514 urb->dev = mixer->chip->dev; 3515 usb_submit_urb(urb, GFP_ATOMIC); 3516 } 3517 } 3518 3519 /* create the handler for the optional status interrupt endpoint */ 3520 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer) 3521 { 3522 struct usb_endpoint_descriptor *ep; 3523 void *transfer_buffer; 3524 int buffer_length; 3525 unsigned int epnum; 3526 3527 /* we need one interrupt input endpoint */ 3528 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1) 3529 return 0; 3530 ep = get_endpoint(mixer->hostif, 0); 3531 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep)) 3532 return 0; 3533 3534 epnum = usb_endpoint_num(ep); 3535 buffer_length = le16_to_cpu(ep->wMaxPacketSize); 3536 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL); 3537 if (!transfer_buffer) 3538 return -ENOMEM; 3539 mixer->urb = usb_alloc_urb(0, GFP_KERNEL); 3540 if (!mixer->urb) { 3541 kfree(transfer_buffer); 3542 return -ENOMEM; 3543 } 3544 usb_fill_int_urb(mixer->urb, mixer->chip->dev, 3545 usb_rcvintpipe(mixer->chip->dev, epnum), 3546 transfer_buffer, buffer_length, 3547 snd_usb_mixer_interrupt, mixer, ep->bInterval); 3548 usb_submit_urb(mixer->urb, GFP_KERNEL); 3549 return 0; 3550 } 3551 3552 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif) 3553 { 3554 static const struct snd_device_ops dev_ops = { 3555 .dev_free = snd_usb_mixer_dev_free 3556 }; 3557 struct usb_mixer_interface *mixer; 3558 int err; 3559 3560 strcpy(chip->card->mixername, "USB Mixer"); 3561 3562 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL); 3563 if (!mixer) 3564 return -ENOMEM; 3565 mixer->chip = chip; 3566 mixer->ignore_ctl_error = !!(chip->quirk_flags & QUIRK_FLAG_IGNORE_CTL_ERROR); 3567 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems), 3568 GFP_KERNEL); 3569 if (!mixer->id_elems) { 3570 kfree(mixer); 3571 return -ENOMEM; 3572 } 3573 3574 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0]; 3575 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) { 3576 case UAC_VERSION_1: 3577 default: 3578 mixer->protocol = UAC_VERSION_1; 3579 break; 3580 case UAC_VERSION_2: 3581 mixer->protocol = UAC_VERSION_2; 3582 break; 3583 case UAC_VERSION_3: 3584 mixer->protocol = UAC_VERSION_3; 3585 break; 3586 } 3587 3588 if (mixer->protocol == UAC_VERSION_3 && 3589 chip->badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) { 3590 err = snd_usb_mixer_controls_badd(mixer, ctrlif); 3591 if (err < 0) 3592 goto _error; 3593 } else { 3594 err = snd_usb_mixer_controls(mixer); 3595 if (err < 0) 3596 goto _error; 3597 } 3598 3599 err = snd_usb_mixer_status_create(mixer); 3600 if (err < 0) 3601 goto _error; 3602 3603 err = snd_usb_mixer_apply_create_quirk(mixer); 3604 if (err < 0) 3605 goto _error; 3606 3607 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops); 3608 if (err < 0) 3609 goto _error; 3610 3611 if (list_empty(&chip->mixer_list)) 3612 snd_card_ro_proc_new(chip->card, "usbmixer", chip, 3613 snd_usb_mixer_proc_read); 3614 3615 list_add(&mixer->list, &chip->mixer_list); 3616 return 0; 3617 3618 _error: 3619 snd_usb_mixer_free(mixer); 3620 return err; 3621 } 3622 3623 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer) 3624 { 3625 if (mixer->disconnected) 3626 return; 3627 if (mixer->urb) 3628 usb_kill_urb(mixer->urb); 3629 if (mixer->rc_urb) 3630 usb_kill_urb(mixer->rc_urb); 3631 if (mixer->private_free) 3632 mixer->private_free(mixer); 3633 mixer->disconnected = true; 3634 } 3635 3636 /* stop any bus activity of a mixer */ 3637 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer) 3638 { 3639 usb_kill_urb(mixer->urb); 3640 usb_kill_urb(mixer->rc_urb); 3641 } 3642 3643 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer) 3644 { 3645 int err; 3646 3647 if (mixer->urb) { 3648 err = usb_submit_urb(mixer->urb, GFP_NOIO); 3649 if (err < 0) 3650 return err; 3651 } 3652 3653 return 0; 3654 } 3655 3656 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer) 3657 { 3658 snd_usb_mixer_inactivate(mixer); 3659 if (mixer->private_suspend) 3660 mixer->private_suspend(mixer); 3661 return 0; 3662 } 3663 3664 static int restore_mixer_value(struct usb_mixer_elem_list *list) 3665 { 3666 struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list); 3667 int c, err, idx; 3668 3669 if (cval->val_type == USB_MIXER_BESPOKEN) 3670 return 0; 3671 3672 if (cval->cmask) { 3673 idx = 0; 3674 for (c = 0; c < MAX_CHANNELS; c++) { 3675 if (!(cval->cmask & (1 << c))) 3676 continue; 3677 if (cval->cached & (1 << (c + 1))) { 3678 err = snd_usb_set_cur_mix_value(cval, c + 1, idx, 3679 cval->cache_val[idx]); 3680 if (err < 0) 3681 break; 3682 } 3683 idx++; 3684 } 3685 } else { 3686 /* master */ 3687 if (cval->cached) 3688 snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val); 3689 } 3690 3691 return 0; 3692 } 3693 3694 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer) 3695 { 3696 struct usb_mixer_elem_list *list; 3697 int id, err; 3698 3699 /* restore cached mixer values */ 3700 for (id = 0; id < MAX_ID_ELEMS; id++) { 3701 for_each_mixer_elem(list, mixer, id) { 3702 if (list->resume) { 3703 err = list->resume(list); 3704 if (err < 0) 3705 return err; 3706 } 3707 } 3708 } 3709 3710 snd_usb_mixer_resume_quirk(mixer); 3711 3712 return snd_usb_mixer_activate(mixer); 3713 } 3714 3715 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, 3716 struct usb_mixer_interface *mixer, 3717 int unitid) 3718 { 3719 list->mixer = mixer; 3720 list->id = unitid; 3721 list->dump = snd_usb_mixer_dump_cval; 3722 list->resume = restore_mixer_value; 3723 } 3724