1 /* 2 * (Tentative) USB Audio Driver for ALSA 3 * 4 * Mixer control part 5 * 6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> 7 * 8 * Many codes borrowed from audio.c by 9 * Alan Cox (alan@lxorguk.ukuu.org.uk) 10 * Thomas Sailer (sailer@ife.ee.ethz.ch) 11 * 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 26 * 27 */ 28 29 /* 30 * TODOs, for both the mixer and the streaming interfaces: 31 * 32 * - support for UAC2 effect units 33 * - support for graphical equalizers 34 * - RANGE and MEM set commands (UAC2) 35 * - RANGE and MEM interrupt dispatchers (UAC2) 36 * - audio channel clustering (UAC2) 37 * - audio sample rate converter units (UAC2) 38 * - proper handling of clock multipliers (UAC2) 39 * - dispatch clock change notifications (UAC2) 40 * - stop PCM streams which use a clock that became invalid 41 * - stop PCM streams which use a clock selector that has changed 42 * - parse available sample rates again when clock sources changed 43 */ 44 45 #include <linux/bitops.h> 46 #include <linux/init.h> 47 #include <linux/list.h> 48 #include <linux/log2.h> 49 #include <linux/slab.h> 50 #include <linux/string.h> 51 #include <linux/usb.h> 52 #include <linux/usb/audio.h> 53 #include <linux/usb/audio-v2.h> 54 55 #include <sound/core.h> 56 #include <sound/control.h> 57 #include <sound/hwdep.h> 58 #include <sound/info.h> 59 #include <sound/tlv.h> 60 61 #include "usbaudio.h" 62 #include "mixer.h" 63 #include "helper.h" 64 #include "mixer_quirks.h" 65 #include "power.h" 66 67 #define MAX_ID_ELEMS 256 68 69 struct usb_audio_term { 70 int id; 71 int type; 72 int channels; 73 unsigned int chconfig; 74 int name; 75 }; 76 77 struct usbmix_name_map; 78 79 struct mixer_build { 80 struct snd_usb_audio *chip; 81 struct usb_mixer_interface *mixer; 82 unsigned char *buffer; 83 unsigned int buflen; 84 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS); 85 struct usb_audio_term oterm; 86 const struct usbmix_name_map *map; 87 const struct usbmix_selector_map *selector_map; 88 }; 89 90 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/ 91 enum { 92 USB_XU_CLOCK_RATE = 0xe301, 93 USB_XU_CLOCK_SOURCE = 0xe302, 94 USB_XU_DIGITAL_IO_STATUS = 0xe303, 95 USB_XU_DEVICE_OPTIONS = 0xe304, 96 USB_XU_DIRECT_MONITORING = 0xe305, 97 USB_XU_METERING = 0xe306 98 }; 99 enum { 100 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/ 101 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */ 102 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */ 103 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */ 104 }; 105 106 /* 107 * manual mapping of mixer names 108 * if the mixer topology is too complicated and the parsed names are 109 * ambiguous, add the entries in usbmixer_maps.c. 110 */ 111 #include "mixer_maps.c" 112 113 static const struct usbmix_name_map * 114 find_map(struct mixer_build *state, int unitid, int control) 115 { 116 const struct usbmix_name_map *p = state->map; 117 118 if (!p) 119 return NULL; 120 121 for (p = state->map; p->id; p++) { 122 if (p->id == unitid && 123 (!control || !p->control || control == p->control)) 124 return p; 125 } 126 return NULL; 127 } 128 129 /* get the mapped name if the unit matches */ 130 static int 131 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen) 132 { 133 if (!p || !p->name) 134 return 0; 135 136 buflen--; 137 return strlcpy(buf, p->name, buflen); 138 } 139 140 /* ignore the error value if ignore_ctl_error flag is set */ 141 #define filter_error(cval, err) \ 142 ((cval)->head.mixer->ignore_ctl_error ? 0 : (err)) 143 144 /* check whether the control should be ignored */ 145 static inline int 146 check_ignored_ctl(const struct usbmix_name_map *p) 147 { 148 if (!p || p->name || p->dB) 149 return 0; 150 return 1; 151 } 152 153 /* dB mapping */ 154 static inline void check_mapped_dB(const struct usbmix_name_map *p, 155 struct usb_mixer_elem_info *cval) 156 { 157 if (p && p->dB) { 158 cval->dBmin = p->dB->min; 159 cval->dBmax = p->dB->max; 160 cval->initialized = 1; 161 } 162 } 163 164 /* get the mapped selector source name */ 165 static int check_mapped_selector_name(struct mixer_build *state, int unitid, 166 int index, char *buf, int buflen) 167 { 168 const struct usbmix_selector_map *p; 169 170 if (!state->selector_map) 171 return 0; 172 for (p = state->selector_map; p->id; p++) { 173 if (p->id == unitid && index < p->count) 174 return strlcpy(buf, p->names[index], buflen); 175 } 176 return 0; 177 } 178 179 /* 180 * find an audio control unit with the given unit id 181 */ 182 static void *find_audio_control_unit(struct mixer_build *state, 183 unsigned char unit) 184 { 185 /* we just parse the header */ 186 struct uac_feature_unit_descriptor *hdr = NULL; 187 188 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr, 189 USB_DT_CS_INTERFACE)) != NULL) { 190 if (hdr->bLength >= 4 && 191 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL && 192 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER && 193 hdr->bUnitID == unit) 194 return hdr; 195 } 196 197 return NULL; 198 } 199 200 /* 201 * copy a string with the given id 202 */ 203 static int snd_usb_copy_string_desc(struct mixer_build *state, 204 int index, char *buf, int maxlen) 205 { 206 int len = usb_string(state->chip->dev, index, buf, maxlen - 1); 207 buf[len] = 0; 208 return len; 209 } 210 211 /* 212 * convert from the byte/word on usb descriptor to the zero-based integer 213 */ 214 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val) 215 { 216 switch (cval->val_type) { 217 case USB_MIXER_BOOLEAN: 218 return !!val; 219 case USB_MIXER_INV_BOOLEAN: 220 return !val; 221 case USB_MIXER_U8: 222 val &= 0xff; 223 break; 224 case USB_MIXER_S8: 225 val &= 0xff; 226 if (val >= 0x80) 227 val -= 0x100; 228 break; 229 case USB_MIXER_U16: 230 val &= 0xffff; 231 break; 232 case USB_MIXER_S16: 233 val &= 0xffff; 234 if (val >= 0x8000) 235 val -= 0x10000; 236 break; 237 } 238 return val; 239 } 240 241 /* 242 * convert from the zero-based int to the byte/word for usb descriptor 243 */ 244 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val) 245 { 246 switch (cval->val_type) { 247 case USB_MIXER_BOOLEAN: 248 return !!val; 249 case USB_MIXER_INV_BOOLEAN: 250 return !val; 251 case USB_MIXER_S8: 252 case USB_MIXER_U8: 253 return val & 0xff; 254 case USB_MIXER_S16: 255 case USB_MIXER_U16: 256 return val & 0xffff; 257 } 258 return 0; /* not reached */ 259 } 260 261 static int get_relative_value(struct usb_mixer_elem_info *cval, int val) 262 { 263 if (!cval->res) 264 cval->res = 1; 265 if (val < cval->min) 266 return 0; 267 else if (val >= cval->max) 268 return (cval->max - cval->min + cval->res - 1) / cval->res; 269 else 270 return (val - cval->min) / cval->res; 271 } 272 273 static int get_abs_value(struct usb_mixer_elem_info *cval, int val) 274 { 275 if (val < 0) 276 return cval->min; 277 if (!cval->res) 278 cval->res = 1; 279 val *= cval->res; 280 val += cval->min; 281 if (val > cval->max) 282 return cval->max; 283 return val; 284 } 285 286 static int uac2_ctl_value_size(int val_type) 287 { 288 switch (val_type) { 289 case USB_MIXER_S32: 290 case USB_MIXER_U32: 291 return 4; 292 case USB_MIXER_S16: 293 case USB_MIXER_U16: 294 return 2; 295 default: 296 return 1; 297 } 298 return 0; /* unreachable */ 299 } 300 301 302 /* 303 * retrieve a mixer value 304 */ 305 306 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, 307 int validx, int *value_ret) 308 { 309 struct snd_usb_audio *chip = cval->head.mixer->chip; 310 unsigned char buf[2]; 311 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 312 int timeout = 10; 313 int idx = 0, err; 314 315 err = snd_usb_lock_shutdown(chip); 316 if (err < 0) 317 return -EIO; 318 319 while (timeout-- > 0) { 320 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 321 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request, 322 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 323 validx, idx, buf, val_len) >= val_len) { 324 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); 325 err = 0; 326 goto out; 327 } 328 } 329 usb_audio_dbg(chip, 330 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 331 request, validx, idx, cval->val_type); 332 err = -EINVAL; 333 334 out: 335 snd_usb_unlock_shutdown(chip); 336 return err; 337 } 338 339 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, 340 int validx, int *value_ret) 341 { 342 struct snd_usb_audio *chip = cval->head.mixer->chip; 343 unsigned char buf[4 + 3 * sizeof(__u32)]; /* enough space for one range */ 344 unsigned char *val; 345 int idx = 0, ret, size; 346 __u8 bRequest; 347 348 if (request == UAC_GET_CUR) { 349 bRequest = UAC2_CS_CUR; 350 size = uac2_ctl_value_size(cval->val_type); 351 } else { 352 bRequest = UAC2_CS_RANGE; 353 size = sizeof(buf); 354 } 355 356 memset(buf, 0, sizeof(buf)); 357 358 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0; 359 if (ret) 360 goto error; 361 362 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 363 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest, 364 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 365 validx, idx, buf, size); 366 snd_usb_unlock_shutdown(chip); 367 368 if (ret < 0) { 369 error: 370 usb_audio_err(chip, 371 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 372 request, validx, idx, cval->val_type); 373 return ret; 374 } 375 376 /* FIXME: how should we handle multiple triplets here? */ 377 378 switch (request) { 379 case UAC_GET_CUR: 380 val = buf; 381 break; 382 case UAC_GET_MIN: 383 val = buf + sizeof(__u16); 384 break; 385 case UAC_GET_MAX: 386 val = buf + sizeof(__u16) * 2; 387 break; 388 case UAC_GET_RES: 389 val = buf + sizeof(__u16) * 3; 390 break; 391 default: 392 return -EINVAL; 393 } 394 395 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16))); 396 397 return 0; 398 } 399 400 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, 401 int validx, int *value_ret) 402 { 403 validx += cval->idx_off; 404 405 return (cval->head.mixer->protocol == UAC_VERSION_1) ? 406 get_ctl_value_v1(cval, request, validx, value_ret) : 407 get_ctl_value_v2(cval, request, validx, value_ret); 408 } 409 410 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, 411 int validx, int *value) 412 { 413 return get_ctl_value(cval, UAC_GET_CUR, validx, value); 414 } 415 416 /* channel = 0: master, 1 = first channel */ 417 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval, 418 int channel, int *value) 419 { 420 return get_ctl_value(cval, UAC_GET_CUR, 421 (cval->control << 8) | channel, 422 value); 423 } 424 425 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, 426 int channel, int index, int *value) 427 { 428 int err; 429 430 if (cval->cached & (1 << channel)) { 431 *value = cval->cache_val[index]; 432 return 0; 433 } 434 err = get_cur_mix_raw(cval, channel, value); 435 if (err < 0) { 436 if (!cval->head.mixer->ignore_ctl_error) 437 usb_audio_dbg(cval->head.mixer->chip, 438 "cannot get current value for control %d ch %d: err = %d\n", 439 cval->control, channel, err); 440 return err; 441 } 442 cval->cached |= 1 << channel; 443 cval->cache_val[index] = *value; 444 return 0; 445 } 446 447 /* 448 * set a mixer value 449 */ 450 451 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, 452 int request, int validx, int value_set) 453 { 454 struct snd_usb_audio *chip = cval->head.mixer->chip; 455 unsigned char buf[4]; 456 int idx = 0, val_len, err, timeout = 10; 457 458 validx += cval->idx_off; 459 460 if (cval->head.mixer->protocol == UAC_VERSION_1) { 461 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 462 } else { /* UAC_VERSION_2 */ 463 val_len = uac2_ctl_value_size(cval->val_type); 464 465 /* FIXME */ 466 if (request != UAC_SET_CUR) { 467 usb_audio_dbg(chip, "RANGE setting not yet supported\n"); 468 return -EINVAL; 469 } 470 471 request = UAC2_CS_CUR; 472 } 473 474 value_set = convert_bytes_value(cval, value_set); 475 buf[0] = value_set & 0xff; 476 buf[1] = (value_set >> 8) & 0xff; 477 buf[2] = (value_set >> 16) & 0xff; 478 buf[3] = (value_set >> 24) & 0xff; 479 480 err = snd_usb_lock_shutdown(chip); 481 if (err < 0) 482 return -EIO; 483 484 while (timeout-- > 0) { 485 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8); 486 if (snd_usb_ctl_msg(chip->dev, 487 usb_sndctrlpipe(chip->dev, 0), request, 488 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, 489 validx, idx, buf, val_len) >= 0) { 490 err = 0; 491 goto out; 492 } 493 } 494 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", 495 request, validx, idx, cval->val_type, buf[0], buf[1]); 496 err = -EINVAL; 497 498 out: 499 snd_usb_unlock_shutdown(chip); 500 return err; 501 } 502 503 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, 504 int validx, int value) 505 { 506 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value); 507 } 508 509 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, 510 int index, int value) 511 { 512 int err; 513 unsigned int read_only = (channel == 0) ? 514 cval->master_readonly : 515 cval->ch_readonly & (1 << (channel - 1)); 516 517 if (read_only) { 518 usb_audio_dbg(cval->head.mixer->chip, 519 "%s(): channel %d of control %d is read_only\n", 520 __func__, channel, cval->control); 521 return 0; 522 } 523 524 err = snd_usb_mixer_set_ctl_value(cval, 525 UAC_SET_CUR, (cval->control << 8) | channel, 526 value); 527 if (err < 0) 528 return err; 529 cval->cached |= 1 << channel; 530 cval->cache_val[index] = value; 531 return 0; 532 } 533 534 /* 535 * TLV callback for mixer volume controls 536 */ 537 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, 538 unsigned int size, unsigned int __user *_tlv) 539 { 540 struct usb_mixer_elem_info *cval = kcontrol->private_data; 541 DECLARE_TLV_DB_MINMAX(scale, 0, 0); 542 543 if (size < sizeof(scale)) 544 return -ENOMEM; 545 scale[2] = cval->dBmin; 546 scale[3] = cval->dBmax; 547 if (copy_to_user(_tlv, scale, sizeof(scale))) 548 return -EFAULT; 549 return 0; 550 } 551 552 /* 553 * parser routines begin here... 554 */ 555 556 static int parse_audio_unit(struct mixer_build *state, int unitid); 557 558 559 /* 560 * check if the input/output channel routing is enabled on the given bitmap. 561 * used for mixer unit parser 562 */ 563 static int check_matrix_bitmap(unsigned char *bmap, 564 int ich, int och, int num_outs) 565 { 566 int idx = ich * num_outs + och; 567 return bmap[idx >> 3] & (0x80 >> (idx & 7)); 568 } 569 570 /* 571 * add an alsa control element 572 * search and increment the index until an empty slot is found. 573 * 574 * if failed, give up and free the control instance. 575 */ 576 577 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list, 578 struct snd_kcontrol *kctl) 579 { 580 struct usb_mixer_interface *mixer = list->mixer; 581 int err; 582 583 while (snd_ctl_find_id(mixer->chip->card, &kctl->id)) 584 kctl->id.index++; 585 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) { 586 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n", 587 err); 588 return err; 589 } 590 list->kctl = kctl; 591 list->next_id_elem = mixer->id_elems[list->id]; 592 mixer->id_elems[list->id] = list; 593 return 0; 594 } 595 596 /* 597 * get a terminal name string 598 */ 599 600 static struct iterm_name_combo { 601 int type; 602 char *name; 603 } iterm_names[] = { 604 { 0x0300, "Output" }, 605 { 0x0301, "Speaker" }, 606 { 0x0302, "Headphone" }, 607 { 0x0303, "HMD Audio" }, 608 { 0x0304, "Desktop Speaker" }, 609 { 0x0305, "Room Speaker" }, 610 { 0x0306, "Com Speaker" }, 611 { 0x0307, "LFE" }, 612 { 0x0600, "External In" }, 613 { 0x0601, "Analog In" }, 614 { 0x0602, "Digital In" }, 615 { 0x0603, "Line" }, 616 { 0x0604, "Legacy In" }, 617 { 0x0605, "IEC958 In" }, 618 { 0x0606, "1394 DA Stream" }, 619 { 0x0607, "1394 DV Stream" }, 620 { 0x0700, "Embedded" }, 621 { 0x0701, "Noise Source" }, 622 { 0x0702, "Equalization Noise" }, 623 { 0x0703, "CD" }, 624 { 0x0704, "DAT" }, 625 { 0x0705, "DCC" }, 626 { 0x0706, "MiniDisk" }, 627 { 0x0707, "Analog Tape" }, 628 { 0x0708, "Phonograph" }, 629 { 0x0709, "VCR Audio" }, 630 { 0x070a, "Video Disk Audio" }, 631 { 0x070b, "DVD Audio" }, 632 { 0x070c, "TV Tuner Audio" }, 633 { 0x070d, "Satellite Rec Audio" }, 634 { 0x070e, "Cable Tuner Audio" }, 635 { 0x070f, "DSS Audio" }, 636 { 0x0710, "Radio Receiver" }, 637 { 0x0711, "Radio Transmitter" }, 638 { 0x0712, "Multi-Track Recorder" }, 639 { 0x0713, "Synthesizer" }, 640 { 0 }, 641 }; 642 643 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm, 644 unsigned char *name, int maxlen, int term_only) 645 { 646 struct iterm_name_combo *names; 647 648 if (iterm->name) 649 return snd_usb_copy_string_desc(state, iterm->name, 650 name, maxlen); 651 652 /* virtual type - not a real terminal */ 653 if (iterm->type >> 16) { 654 if (term_only) 655 return 0; 656 switch (iterm->type >> 16) { 657 case UAC_SELECTOR_UNIT: 658 strcpy(name, "Selector"); 659 return 8; 660 case UAC1_PROCESSING_UNIT: 661 strcpy(name, "Process Unit"); 662 return 12; 663 case UAC1_EXTENSION_UNIT: 664 strcpy(name, "Ext Unit"); 665 return 8; 666 case UAC_MIXER_UNIT: 667 strcpy(name, "Mixer"); 668 return 5; 669 default: 670 return sprintf(name, "Unit %d", iterm->id); 671 } 672 } 673 674 switch (iterm->type & 0xff00) { 675 case 0x0100: 676 strcpy(name, "PCM"); 677 return 3; 678 case 0x0200: 679 strcpy(name, "Mic"); 680 return 3; 681 case 0x0400: 682 strcpy(name, "Headset"); 683 return 7; 684 case 0x0500: 685 strcpy(name, "Phone"); 686 return 5; 687 } 688 689 for (names = iterm_names; names->type; names++) { 690 if (names->type == iterm->type) { 691 strcpy(name, names->name); 692 return strlen(names->name); 693 } 694 } 695 696 return 0; 697 } 698 699 /* 700 * parse the source unit recursively until it reaches to a terminal 701 * or a branched unit. 702 */ 703 static int check_input_term(struct mixer_build *state, int id, 704 struct usb_audio_term *term) 705 { 706 int err; 707 void *p1; 708 709 memset(term, 0, sizeof(*term)); 710 while ((p1 = find_audio_control_unit(state, id)) != NULL) { 711 unsigned char *hdr = p1; 712 term->id = id; 713 switch (hdr[2]) { 714 case UAC_INPUT_TERMINAL: 715 if (state->mixer->protocol == UAC_VERSION_1) { 716 struct uac_input_terminal_descriptor *d = p1; 717 term->type = le16_to_cpu(d->wTerminalType); 718 term->channels = d->bNrChannels; 719 term->chconfig = le16_to_cpu(d->wChannelConfig); 720 term->name = d->iTerminal; 721 } else { /* UAC_VERSION_2 */ 722 struct uac2_input_terminal_descriptor *d = p1; 723 724 /* call recursively to verify that the 725 * referenced clock entity is valid */ 726 err = check_input_term(state, d->bCSourceID, term); 727 if (err < 0) 728 return err; 729 730 /* save input term properties after recursion, 731 * to ensure they are not overriden by the 732 * recursion calls */ 733 term->id = id; 734 term->type = le16_to_cpu(d->wTerminalType); 735 term->channels = d->bNrChannels; 736 term->chconfig = le32_to_cpu(d->bmChannelConfig); 737 term->name = d->iTerminal; 738 } 739 return 0; 740 case UAC_FEATURE_UNIT: { 741 /* the header is the same for v1 and v2 */ 742 struct uac_feature_unit_descriptor *d = p1; 743 id = d->bSourceID; 744 break; /* continue to parse */ 745 } 746 case UAC_MIXER_UNIT: { 747 struct uac_mixer_unit_descriptor *d = p1; 748 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 749 term->channels = uac_mixer_unit_bNrChannels(d); 750 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol); 751 term->name = uac_mixer_unit_iMixer(d); 752 return 0; 753 } 754 case UAC_SELECTOR_UNIT: 755 case UAC2_CLOCK_SELECTOR: { 756 struct uac_selector_unit_descriptor *d = p1; 757 /* call recursively to retrieve the channel info */ 758 err = check_input_term(state, d->baSourceID[0], term); 759 if (err < 0) 760 return err; 761 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 762 term->id = id; 763 term->name = uac_selector_unit_iSelector(d); 764 return 0; 765 } 766 case UAC1_PROCESSING_UNIT: 767 case UAC1_EXTENSION_UNIT: 768 /* UAC2_PROCESSING_UNIT_V2 */ 769 /* UAC2_EFFECT_UNIT */ 770 case UAC2_EXTENSION_UNIT_V2: { 771 struct uac_processing_unit_descriptor *d = p1; 772 773 if (state->mixer->protocol == UAC_VERSION_2 && 774 hdr[2] == UAC2_EFFECT_UNIT) { 775 /* UAC2/UAC1 unit IDs overlap here in an 776 * uncompatible way. Ignore this unit for now. 777 */ 778 return 0; 779 } 780 781 if (d->bNrInPins) { 782 id = d->baSourceID[0]; 783 break; /* continue to parse */ 784 } 785 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 786 term->channels = uac_processing_unit_bNrChannels(d); 787 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol); 788 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol); 789 return 0; 790 } 791 case UAC2_CLOCK_SOURCE: { 792 struct uac_clock_source_descriptor *d = p1; 793 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 794 term->id = id; 795 term->name = d->iClockSource; 796 return 0; 797 } 798 default: 799 return -ENODEV; 800 } 801 } 802 return -ENODEV; 803 } 804 805 /* 806 * Feature Unit 807 */ 808 809 /* feature unit control information */ 810 struct usb_feature_control_info { 811 const char *name; 812 int type; /* data type for uac1 */ 813 int type_uac2; /* data type for uac2 if different from uac1, else -1 */ 814 }; 815 816 static struct usb_feature_control_info audio_feature_info[] = { 817 { "Mute", USB_MIXER_INV_BOOLEAN, -1 }, 818 { "Volume", USB_MIXER_S16, -1 }, 819 { "Tone Control - Bass", USB_MIXER_S8, -1 }, 820 { "Tone Control - Mid", USB_MIXER_S8, -1 }, 821 { "Tone Control - Treble", USB_MIXER_S8, -1 }, 822 { "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemeted yet */ 823 { "Auto Gain Control", USB_MIXER_BOOLEAN, -1 }, 824 { "Delay Control", USB_MIXER_U16, USB_MIXER_U32 }, 825 { "Bass Boost", USB_MIXER_BOOLEAN, -1 }, 826 { "Loudness", USB_MIXER_BOOLEAN, -1 }, 827 /* UAC2 specific */ 828 { "Input Gain Control", USB_MIXER_S16, -1 }, 829 { "Input Gain Pad Control", USB_MIXER_S16, -1 }, 830 { "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 }, 831 }; 832 833 /* private_free callback */ 834 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl) 835 { 836 kfree(kctl->private_data); 837 kctl->private_data = NULL; 838 } 839 840 /* 841 * interface to ALSA control for feature/mixer units 842 */ 843 844 /* volume control quirks */ 845 static void volume_control_quirks(struct usb_mixer_elem_info *cval, 846 struct snd_kcontrol *kctl) 847 { 848 struct snd_usb_audio *chip = cval->head.mixer->chip; 849 switch (chip->usb_id) { 850 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ 851 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */ 852 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 853 cval->min = 0x0000; 854 cval->max = 0xffff; 855 cval->res = 0x00e6; 856 break; 857 } 858 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 859 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 860 cval->min = 0x00; 861 cval->max = 0xff; 862 break; 863 } 864 if (strstr(kctl->id.name, "Effect Return") != NULL) { 865 cval->min = 0xb706; 866 cval->max = 0xff7b; 867 cval->res = 0x0073; 868 break; 869 } 870 if ((strstr(kctl->id.name, "Playback Volume") != NULL) || 871 (strstr(kctl->id.name, "Effect Send") != NULL)) { 872 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */ 873 cval->max = 0xfcfe; 874 cval->res = 0x0073; 875 } 876 break; 877 878 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */ 879 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */ 880 if (strcmp(kctl->id.name, "Effect Duration") == 0) { 881 usb_audio_info(chip, 882 "set quirk for FTU Effect Duration\n"); 883 cval->min = 0x0000; 884 cval->max = 0x7f00; 885 cval->res = 0x0100; 886 break; 887 } 888 if (strcmp(kctl->id.name, "Effect Volume") == 0 || 889 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { 890 usb_audio_info(chip, 891 "set quirks for FTU Effect Feedback/Volume\n"); 892 cval->min = 0x00; 893 cval->max = 0x7f; 894 break; 895 } 896 break; 897 898 case USB_ID(0x0471, 0x0101): 899 case USB_ID(0x0471, 0x0104): 900 case USB_ID(0x0471, 0x0105): 901 case USB_ID(0x0672, 0x1041): 902 /* quirk for UDA1321/N101. 903 * note that detection between firmware 2.1.1.7 (N101) 904 * and later 2.1.1.21 is not very clear from datasheets. 905 * I hope that the min value is -15360 for newer firmware --jk 906 */ 907 if (!strcmp(kctl->id.name, "PCM Playback Volume") && 908 cval->min == -15616) { 909 usb_audio_info(chip, 910 "set volume quirk for UDA1321/N101 chip\n"); 911 cval->max = -256; 912 } 913 break; 914 915 case USB_ID(0x046d, 0x09a4): 916 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 917 usb_audio_info(chip, 918 "set volume quirk for QuickCam E3500\n"); 919 cval->min = 6080; 920 cval->max = 8768; 921 cval->res = 192; 922 } 923 break; 924 925 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */ 926 case USB_ID(0x046d, 0x0808): 927 case USB_ID(0x046d, 0x0809): 928 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */ 929 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */ 930 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */ 931 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */ 932 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */ 933 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */ 934 case USB_ID(0x046d, 0x0991): 935 /* Most audio usb devices lie about volume resolution. 936 * Most Logitech webcams have res = 384. 937 * Proboly there is some logitech magic behind this number --fishor 938 */ 939 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 940 usb_audio_info(chip, 941 "set resolution quirk: cval->res = 384\n"); 942 cval->res = 384; 943 } 944 break; 945 } 946 } 947 948 /* 949 * retrieve the minimum and maximum values for the specified control 950 */ 951 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval, 952 int default_min, struct snd_kcontrol *kctl) 953 { 954 /* for failsafe */ 955 cval->min = default_min; 956 cval->max = cval->min + 1; 957 cval->res = 1; 958 cval->dBmin = cval->dBmax = 0; 959 960 if (cval->val_type == USB_MIXER_BOOLEAN || 961 cval->val_type == USB_MIXER_INV_BOOLEAN) { 962 cval->initialized = 1; 963 } else { 964 int minchn = 0; 965 if (cval->cmask) { 966 int i; 967 for (i = 0; i < MAX_CHANNELS; i++) 968 if (cval->cmask & (1 << i)) { 969 minchn = i + 1; 970 break; 971 } 972 } 973 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 || 974 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) { 975 usb_audio_err(cval->head.mixer->chip, 976 "%d:%d: cannot get min/max values for control %d (id %d)\n", 977 cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip), 978 cval->control, cval->head.id); 979 return -EINVAL; 980 } 981 if (get_ctl_value(cval, UAC_GET_RES, 982 (cval->control << 8) | minchn, 983 &cval->res) < 0) { 984 cval->res = 1; 985 } else { 986 int last_valid_res = cval->res; 987 988 while (cval->res > 1) { 989 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES, 990 (cval->control << 8) | minchn, 991 cval->res / 2) < 0) 992 break; 993 cval->res /= 2; 994 } 995 if (get_ctl_value(cval, UAC_GET_RES, 996 (cval->control << 8) | minchn, &cval->res) < 0) 997 cval->res = last_valid_res; 998 } 999 if (cval->res == 0) 1000 cval->res = 1; 1001 1002 /* Additional checks for the proper resolution 1003 * 1004 * Some devices report smaller resolutions than actually 1005 * reacting. They don't return errors but simply clip 1006 * to the lower aligned value. 1007 */ 1008 if (cval->min + cval->res < cval->max) { 1009 int last_valid_res = cval->res; 1010 int saved, test, check; 1011 get_cur_mix_raw(cval, minchn, &saved); 1012 for (;;) { 1013 test = saved; 1014 if (test < cval->max) 1015 test += cval->res; 1016 else 1017 test -= cval->res; 1018 if (test < cval->min || test > cval->max || 1019 snd_usb_set_cur_mix_value(cval, minchn, 0, test) || 1020 get_cur_mix_raw(cval, minchn, &check)) { 1021 cval->res = last_valid_res; 1022 break; 1023 } 1024 if (test == check) 1025 break; 1026 cval->res *= 2; 1027 } 1028 snd_usb_set_cur_mix_value(cval, minchn, 0, saved); 1029 } 1030 1031 cval->initialized = 1; 1032 } 1033 1034 if (kctl) 1035 volume_control_quirks(cval, kctl); 1036 1037 /* USB descriptions contain the dB scale in 1/256 dB unit 1038 * while ALSA TLV contains in 1/100 dB unit 1039 */ 1040 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; 1041 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; 1042 if (cval->dBmin > cval->dBmax) { 1043 /* something is wrong; assume it's either from/to 0dB */ 1044 if (cval->dBmin < 0) 1045 cval->dBmax = 0; 1046 else if (cval->dBmin > 0) 1047 cval->dBmin = 0; 1048 if (cval->dBmin > cval->dBmax) { 1049 /* totally crap, return an error */ 1050 return -EINVAL; 1051 } 1052 } 1053 1054 return 0; 1055 } 1056 1057 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL) 1058 1059 /* get a feature/mixer unit info */ 1060 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, 1061 struct snd_ctl_elem_info *uinfo) 1062 { 1063 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1064 1065 if (cval->val_type == USB_MIXER_BOOLEAN || 1066 cval->val_type == USB_MIXER_INV_BOOLEAN) 1067 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 1068 else 1069 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 1070 uinfo->count = cval->channels; 1071 if (cval->val_type == USB_MIXER_BOOLEAN || 1072 cval->val_type == USB_MIXER_INV_BOOLEAN) { 1073 uinfo->value.integer.min = 0; 1074 uinfo->value.integer.max = 1; 1075 } else { 1076 if (!cval->initialized) { 1077 get_min_max_with_quirks(cval, 0, kcontrol); 1078 if (cval->initialized && cval->dBmin >= cval->dBmax) { 1079 kcontrol->vd[0].access &= 1080 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1081 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); 1082 snd_ctl_notify(cval->head.mixer->chip->card, 1083 SNDRV_CTL_EVENT_MASK_INFO, 1084 &kcontrol->id); 1085 } 1086 } 1087 uinfo->value.integer.min = 0; 1088 uinfo->value.integer.max = 1089 (cval->max - cval->min + cval->res - 1) / cval->res; 1090 } 1091 return 0; 1092 } 1093 1094 /* get the current value from feature/mixer unit */ 1095 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, 1096 struct snd_ctl_elem_value *ucontrol) 1097 { 1098 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1099 int c, cnt, val, err; 1100 1101 ucontrol->value.integer.value[0] = cval->min; 1102 if (cval->cmask) { 1103 cnt = 0; 1104 for (c = 0; c < MAX_CHANNELS; c++) { 1105 if (!(cval->cmask & (1 << c))) 1106 continue; 1107 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val); 1108 if (err < 0) 1109 return filter_error(cval, err); 1110 val = get_relative_value(cval, val); 1111 ucontrol->value.integer.value[cnt] = val; 1112 cnt++; 1113 } 1114 return 0; 1115 } else { 1116 /* master channel */ 1117 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val); 1118 if (err < 0) 1119 return filter_error(cval, err); 1120 val = get_relative_value(cval, val); 1121 ucontrol->value.integer.value[0] = val; 1122 } 1123 return 0; 1124 } 1125 1126 /* put the current value to feature/mixer unit */ 1127 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, 1128 struct snd_ctl_elem_value *ucontrol) 1129 { 1130 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1131 int c, cnt, val, oval, err; 1132 int changed = 0; 1133 1134 if (cval->cmask) { 1135 cnt = 0; 1136 for (c = 0; c < MAX_CHANNELS; c++) { 1137 if (!(cval->cmask & (1 << c))) 1138 continue; 1139 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval); 1140 if (err < 0) 1141 return filter_error(cval, err); 1142 val = ucontrol->value.integer.value[cnt]; 1143 val = get_abs_value(cval, val); 1144 if (oval != val) { 1145 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val); 1146 changed = 1; 1147 } 1148 cnt++; 1149 } 1150 } else { 1151 /* master channel */ 1152 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval); 1153 if (err < 0) 1154 return filter_error(cval, err); 1155 val = ucontrol->value.integer.value[0]; 1156 val = get_abs_value(cval, val); 1157 if (val != oval) { 1158 snd_usb_set_cur_mix_value(cval, 0, 0, val); 1159 changed = 1; 1160 } 1161 } 1162 return changed; 1163 } 1164 1165 static struct snd_kcontrol_new usb_feature_unit_ctl = { 1166 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1167 .name = "", /* will be filled later manually */ 1168 .info = mixer_ctl_feature_info, 1169 .get = mixer_ctl_feature_get, 1170 .put = mixer_ctl_feature_put, 1171 }; 1172 1173 /* the read-only variant */ 1174 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = { 1175 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1176 .name = "", /* will be filled later manually */ 1177 .info = mixer_ctl_feature_info, 1178 .get = mixer_ctl_feature_get, 1179 .put = NULL, 1180 }; 1181 1182 /* 1183 * This symbol is exported in order to allow the mixer quirks to 1184 * hook up to the standard feature unit control mechanism 1185 */ 1186 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl; 1187 1188 /* 1189 * build a feature control 1190 */ 1191 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str) 1192 { 1193 return strlcat(kctl->id.name, str, sizeof(kctl->id.name)); 1194 } 1195 1196 /* 1197 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we 1198 * rename it to "Headphone". We determine if something is a headphone 1199 * similar to how udev determines form factor. 1200 */ 1201 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl, 1202 struct snd_card *card) 1203 { 1204 const char *names_to_check[] = { 1205 "Headset", "headset", "Headphone", "headphone", NULL}; 1206 const char **s; 1207 bool found = false; 1208 1209 if (strcmp("Speaker", kctl->id.name)) 1210 return; 1211 1212 for (s = names_to_check; *s; s++) 1213 if (strstr(card->shortname, *s)) { 1214 found = true; 1215 break; 1216 } 1217 1218 if (!found) 1219 return; 1220 1221 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name)); 1222 } 1223 1224 static void build_feature_ctl(struct mixer_build *state, void *raw_desc, 1225 unsigned int ctl_mask, int control, 1226 struct usb_audio_term *iterm, int unitid, 1227 int readonly_mask) 1228 { 1229 struct uac_feature_unit_descriptor *desc = raw_desc; 1230 struct usb_feature_control_info *ctl_info; 1231 unsigned int len = 0; 1232 int mapped_name = 0; 1233 int nameid = uac_feature_unit_iFeature(desc); 1234 struct snd_kcontrol *kctl; 1235 struct usb_mixer_elem_info *cval; 1236 const struct usbmix_name_map *map; 1237 unsigned int range; 1238 1239 control++; /* change from zero-based to 1-based value */ 1240 1241 if (control == UAC_FU_GRAPHIC_EQUALIZER) { 1242 /* FIXME: not supported yet */ 1243 return; 1244 } 1245 1246 map = find_map(state, unitid, control); 1247 if (check_ignored_ctl(map)) 1248 return; 1249 1250 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1251 if (!cval) 1252 return; 1253 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1254 cval->control = control; 1255 cval->cmask = ctl_mask; 1256 ctl_info = &audio_feature_info[control-1]; 1257 if (state->mixer->protocol == UAC_VERSION_1) 1258 cval->val_type = ctl_info->type; 1259 else /* UAC_VERSION_2 */ 1260 cval->val_type = ctl_info->type_uac2 >= 0 ? 1261 ctl_info->type_uac2 : ctl_info->type; 1262 1263 if (ctl_mask == 0) { 1264 cval->channels = 1; /* master channel */ 1265 cval->master_readonly = readonly_mask; 1266 } else { 1267 int i, c = 0; 1268 for (i = 0; i < 16; i++) 1269 if (ctl_mask & (1 << i)) 1270 c++; 1271 cval->channels = c; 1272 cval->ch_readonly = readonly_mask; 1273 } 1274 1275 /* 1276 * If all channels in the mask are marked read-only, make the control 1277 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't 1278 * issue write commands to read-only channels. 1279 */ 1280 if (cval->channels == readonly_mask) 1281 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); 1282 else 1283 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1284 1285 if (!kctl) { 1286 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 1287 kfree(cval); 1288 return; 1289 } 1290 kctl->private_free = snd_usb_mixer_elem_free; 1291 1292 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1293 mapped_name = len != 0; 1294 if (!len && nameid) 1295 len = snd_usb_copy_string_desc(state, nameid, 1296 kctl->id.name, sizeof(kctl->id.name)); 1297 1298 switch (control) { 1299 case UAC_FU_MUTE: 1300 case UAC_FU_VOLUME: 1301 /* 1302 * determine the control name. the rule is: 1303 * - if a name id is given in descriptor, use it. 1304 * - if the connected input can be determined, then use the name 1305 * of terminal type. 1306 * - if the connected output can be determined, use it. 1307 * - otherwise, anonymous name. 1308 */ 1309 if (!len) { 1310 len = get_term_name(state, iterm, kctl->id.name, 1311 sizeof(kctl->id.name), 1); 1312 if (!len) 1313 len = get_term_name(state, &state->oterm, 1314 kctl->id.name, 1315 sizeof(kctl->id.name), 1); 1316 if (!len) 1317 snprintf(kctl->id.name, sizeof(kctl->id.name), 1318 "Feature %d", unitid); 1319 } 1320 1321 if (!mapped_name) 1322 check_no_speaker_on_headset(kctl, state->mixer->chip->card); 1323 1324 /* 1325 * determine the stream direction: 1326 * if the connected output is USB stream, then it's likely a 1327 * capture stream. otherwise it should be playback (hopefully :) 1328 */ 1329 if (!mapped_name && !(state->oterm.type >> 16)) { 1330 if ((state->oterm.type & 0xff00) == 0x0100) 1331 append_ctl_name(kctl, " Capture"); 1332 else 1333 append_ctl_name(kctl, " Playback"); 1334 } 1335 append_ctl_name(kctl, control == UAC_FU_MUTE ? 1336 " Switch" : " Volume"); 1337 break; 1338 default: 1339 if (!len) 1340 strlcpy(kctl->id.name, audio_feature_info[control-1].name, 1341 sizeof(kctl->id.name)); 1342 break; 1343 } 1344 1345 /* get min/max values */ 1346 get_min_max_with_quirks(cval, 0, kctl); 1347 1348 if (control == UAC_FU_VOLUME) { 1349 check_mapped_dB(map, cval); 1350 if (cval->dBmin < cval->dBmax || !cval->initialized) { 1351 kctl->tlv.c = snd_usb_mixer_vol_tlv; 1352 kctl->vd[0].access |= 1353 SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1354 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; 1355 } 1356 } 1357 1358 snd_usb_mixer_fu_apply_quirk(state->mixer, cval, unitid, kctl); 1359 1360 range = (cval->max - cval->min) / cval->res; 1361 /* 1362 * Are there devices with volume range more than 255? I use a bit more 1363 * to be sure. 384 is a resolution magic number found on Logitech 1364 * devices. It will definitively catch all buggy Logitech devices. 1365 */ 1366 if (range > 384) { 1367 usb_audio_warn(state->chip, 1368 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.", 1369 range); 1370 usb_audio_warn(state->chip, 1371 "[%d] FU [%s] ch = %d, val = %d/%d/%d", 1372 cval->head.id, kctl->id.name, cval->channels, 1373 cval->min, cval->max, cval->res); 1374 } 1375 1376 usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n", 1377 cval->head.id, kctl->id.name, cval->channels, 1378 cval->min, cval->max, cval->res); 1379 snd_usb_mixer_add_control(&cval->head, kctl); 1380 } 1381 1382 static int parse_clock_source_unit(struct mixer_build *state, int unitid, 1383 void *_ftr) 1384 { 1385 struct uac_clock_source_descriptor *hdr = _ftr; 1386 struct usb_mixer_elem_info *cval; 1387 struct snd_kcontrol *kctl; 1388 char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; 1389 int ret; 1390 1391 if (state->mixer->protocol != UAC_VERSION_2) 1392 return -EINVAL; 1393 1394 if (hdr->bLength != sizeof(*hdr)) { 1395 usb_audio_dbg(state->chip, 1396 "Bogus clock source descriptor length of %d, ignoring.\n", 1397 hdr->bLength); 1398 return 0; 1399 } 1400 1401 /* 1402 * The only property of this unit we are interested in is the 1403 * clock source validity. If that isn't readable, just bail out. 1404 */ 1405 if (!uac2_control_is_readable(hdr->bmControls, 1406 ilog2(UAC2_CS_CONTROL_CLOCK_VALID))) 1407 return 0; 1408 1409 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1410 if (!cval) 1411 return -ENOMEM; 1412 1413 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, hdr->bClockID); 1414 1415 cval->min = 0; 1416 cval->max = 1; 1417 cval->channels = 1; 1418 cval->val_type = USB_MIXER_BOOLEAN; 1419 cval->control = UAC2_CS_CONTROL_CLOCK_VALID; 1420 1421 if (uac2_control_is_writeable(hdr->bmControls, 1422 ilog2(UAC2_CS_CONTROL_CLOCK_VALID))) 1423 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1424 else { 1425 cval->master_readonly = 1; 1426 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); 1427 } 1428 1429 if (!kctl) { 1430 kfree(cval); 1431 return -ENOMEM; 1432 } 1433 1434 kctl->private_free = snd_usb_mixer_elem_free; 1435 ret = snd_usb_copy_string_desc(state, hdr->iClockSource, 1436 name, sizeof(name)); 1437 if (ret > 0) 1438 snprintf(kctl->id.name, sizeof(kctl->id.name), 1439 "%s Validity", name); 1440 else 1441 snprintf(kctl->id.name, sizeof(kctl->id.name), 1442 "Clock Source %d Validity", hdr->bClockID); 1443 1444 return snd_usb_mixer_add_control(&cval->head, kctl); 1445 } 1446 1447 /* 1448 * parse a feature unit 1449 * 1450 * most of controls are defined here. 1451 */ 1452 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, 1453 void *_ftr) 1454 { 1455 int channels, i, j; 1456 struct usb_audio_term iterm; 1457 unsigned int master_bits, first_ch_bits; 1458 int err, csize; 1459 struct uac_feature_unit_descriptor *hdr = _ftr; 1460 __u8 *bmaControls; 1461 1462 if (state->mixer->protocol == UAC_VERSION_1) { 1463 csize = hdr->bControlSize; 1464 if (!csize) { 1465 usb_audio_dbg(state->chip, 1466 "unit %u: invalid bControlSize == 0\n", 1467 unitid); 1468 return -EINVAL; 1469 } 1470 channels = (hdr->bLength - 7) / csize - 1; 1471 bmaControls = hdr->bmaControls; 1472 if (hdr->bLength < 7 + csize) { 1473 usb_audio_err(state->chip, 1474 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", 1475 unitid); 1476 return -EINVAL; 1477 } 1478 } else { 1479 struct uac2_feature_unit_descriptor *ftr = _ftr; 1480 csize = 4; 1481 channels = (hdr->bLength - 6) / 4 - 1; 1482 bmaControls = ftr->bmaControls; 1483 if (hdr->bLength < 6 + csize) { 1484 usb_audio_err(state->chip, 1485 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", 1486 unitid); 1487 return -EINVAL; 1488 } 1489 } 1490 1491 /* parse the source unit */ 1492 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0) 1493 return err; 1494 1495 /* determine the input source type and name */ 1496 err = check_input_term(state, hdr->bSourceID, &iterm); 1497 if (err < 0) 1498 return err; 1499 1500 master_bits = snd_usb_combine_bytes(bmaControls, csize); 1501 /* master configuration quirks */ 1502 switch (state->chip->usb_id) { 1503 case USB_ID(0x08bb, 0x2702): 1504 usb_audio_info(state->chip, 1505 "usbmixer: master volume quirk for PCM2702 chip\n"); 1506 /* disable non-functional volume control */ 1507 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME); 1508 break; 1509 case USB_ID(0x1130, 0xf211): 1510 usb_audio_info(state->chip, 1511 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n"); 1512 /* disable non-functional volume control */ 1513 channels = 0; 1514 break; 1515 1516 } 1517 if (channels > 0) 1518 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize); 1519 else 1520 first_ch_bits = 0; 1521 1522 if (state->mixer->protocol == UAC_VERSION_1) { 1523 /* check all control types */ 1524 for (i = 0; i < 10; i++) { 1525 unsigned int ch_bits = 0; 1526 for (j = 0; j < channels; j++) { 1527 unsigned int mask; 1528 1529 mask = snd_usb_combine_bytes(bmaControls + 1530 csize * (j+1), csize); 1531 if (mask & (1 << i)) 1532 ch_bits |= (1 << j); 1533 } 1534 /* audio class v1 controls are never read-only */ 1535 1536 /* 1537 * The first channel must be set 1538 * (for ease of programming). 1539 */ 1540 if (ch_bits & 1) 1541 build_feature_ctl(state, _ftr, ch_bits, i, 1542 &iterm, unitid, 0); 1543 if (master_bits & (1 << i)) 1544 build_feature_ctl(state, _ftr, 0, i, &iterm, 1545 unitid, 0); 1546 } 1547 } else { /* UAC_VERSION_2 */ 1548 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) { 1549 unsigned int ch_bits = 0; 1550 unsigned int ch_read_only = 0; 1551 1552 for (j = 0; j < channels; j++) { 1553 unsigned int mask; 1554 1555 mask = snd_usb_combine_bytes(bmaControls + 1556 csize * (j+1), csize); 1557 if (uac2_control_is_readable(mask, i)) { 1558 ch_bits |= (1 << j); 1559 if (!uac2_control_is_writeable(mask, i)) 1560 ch_read_only |= (1 << j); 1561 } 1562 } 1563 1564 /* 1565 * NOTE: build_feature_ctl() will mark the control 1566 * read-only if all channels are marked read-only in 1567 * the descriptors. Otherwise, the control will be 1568 * reported as writeable, but the driver will not 1569 * actually issue a write command for read-only 1570 * channels. 1571 */ 1572 1573 /* 1574 * The first channel must be set 1575 * (for ease of programming). 1576 */ 1577 if (ch_bits & 1) 1578 build_feature_ctl(state, _ftr, ch_bits, i, 1579 &iterm, unitid, ch_read_only); 1580 if (uac2_control_is_readable(master_bits, i)) 1581 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 1582 !uac2_control_is_writeable(master_bits, i)); 1583 } 1584 } 1585 1586 return 0; 1587 } 1588 1589 /* 1590 * Mixer Unit 1591 */ 1592 1593 /* 1594 * build a mixer unit control 1595 * 1596 * the callbacks are identical with feature unit. 1597 * input channel number (zero based) is given in control field instead. 1598 */ 1599 static void build_mixer_unit_ctl(struct mixer_build *state, 1600 struct uac_mixer_unit_descriptor *desc, 1601 int in_pin, int in_ch, int unitid, 1602 struct usb_audio_term *iterm) 1603 { 1604 struct usb_mixer_elem_info *cval; 1605 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc); 1606 unsigned int i, len; 1607 struct snd_kcontrol *kctl; 1608 const struct usbmix_name_map *map; 1609 1610 map = find_map(state, unitid, 0); 1611 if (check_ignored_ctl(map)) 1612 return; 1613 1614 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1615 if (!cval) 1616 return; 1617 1618 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1619 cval->control = in_ch + 1; /* based on 1 */ 1620 cval->val_type = USB_MIXER_S16; 1621 for (i = 0; i < num_outs; i++) { 1622 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); 1623 1624 if (check_matrix_bitmap(c, in_ch, i, num_outs)) { 1625 cval->cmask |= (1 << i); 1626 cval->channels++; 1627 } 1628 } 1629 1630 /* get min/max values */ 1631 get_min_max(cval, 0); 1632 1633 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1634 if (!kctl) { 1635 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 1636 kfree(cval); 1637 return; 1638 } 1639 kctl->private_free = snd_usb_mixer_elem_free; 1640 1641 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1642 if (!len) 1643 len = get_term_name(state, iterm, kctl->id.name, 1644 sizeof(kctl->id.name), 0); 1645 if (!len) 1646 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1); 1647 append_ctl_name(kctl, " Volume"); 1648 1649 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n", 1650 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max); 1651 snd_usb_mixer_add_control(&cval->head, kctl); 1652 } 1653 1654 /* 1655 * parse a mixer unit 1656 */ 1657 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, 1658 void *raw_desc) 1659 { 1660 struct uac_mixer_unit_descriptor *desc = raw_desc; 1661 struct usb_audio_term iterm; 1662 int input_pins, num_ins, num_outs; 1663 int pin, ich, err; 1664 1665 if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) || 1666 !(num_outs = uac_mixer_unit_bNrChannels(desc))) { 1667 usb_audio_err(state->chip, 1668 "invalid MIXER UNIT descriptor %d\n", 1669 unitid); 1670 return -EINVAL; 1671 } 1672 1673 num_ins = 0; 1674 ich = 0; 1675 for (pin = 0; pin < input_pins; pin++) { 1676 err = parse_audio_unit(state, desc->baSourceID[pin]); 1677 if (err < 0) 1678 continue; 1679 /* no bmControls field (e.g. Maya44) -> ignore */ 1680 if (desc->bLength <= 10 + input_pins) 1681 continue; 1682 err = check_input_term(state, desc->baSourceID[pin], &iterm); 1683 if (err < 0) 1684 return err; 1685 num_ins += iterm.channels; 1686 for (; ich < num_ins; ich++) { 1687 int och, ich_has_controls = 0; 1688 1689 for (och = 0; och < num_outs; och++) { 1690 __u8 *c = uac_mixer_unit_bmControls(desc, 1691 state->mixer->protocol); 1692 1693 if (check_matrix_bitmap(c, ich, och, num_outs)) { 1694 ich_has_controls = 1; 1695 break; 1696 } 1697 } 1698 if (ich_has_controls) 1699 build_mixer_unit_ctl(state, desc, pin, ich, 1700 unitid, &iterm); 1701 } 1702 } 1703 return 0; 1704 } 1705 1706 /* 1707 * Processing Unit / Extension Unit 1708 */ 1709 1710 /* get callback for processing/extension unit */ 1711 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, 1712 struct snd_ctl_elem_value *ucontrol) 1713 { 1714 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1715 int err, val; 1716 1717 err = get_cur_ctl_value(cval, cval->control << 8, &val); 1718 if (err < 0) { 1719 ucontrol->value.integer.value[0] = cval->min; 1720 return filter_error(cval, err); 1721 } 1722 val = get_relative_value(cval, val); 1723 ucontrol->value.integer.value[0] = val; 1724 return 0; 1725 } 1726 1727 /* put callback for processing/extension unit */ 1728 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, 1729 struct snd_ctl_elem_value *ucontrol) 1730 { 1731 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1732 int val, oval, err; 1733 1734 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 1735 if (err < 0) 1736 return filter_error(cval, err); 1737 val = ucontrol->value.integer.value[0]; 1738 val = get_abs_value(cval, val); 1739 if (val != oval) { 1740 set_cur_ctl_value(cval, cval->control << 8, val); 1741 return 1; 1742 } 1743 return 0; 1744 } 1745 1746 /* alsa control interface for processing/extension unit */ 1747 static struct snd_kcontrol_new mixer_procunit_ctl = { 1748 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1749 .name = "", /* will be filled later */ 1750 .info = mixer_ctl_feature_info, 1751 .get = mixer_ctl_procunit_get, 1752 .put = mixer_ctl_procunit_put, 1753 }; 1754 1755 /* 1756 * predefined data for processing units 1757 */ 1758 struct procunit_value_info { 1759 int control; 1760 char *suffix; 1761 int val_type; 1762 int min_value; 1763 }; 1764 1765 struct procunit_info { 1766 int type; 1767 char *name; 1768 struct procunit_value_info *values; 1769 }; 1770 1771 static struct procunit_value_info updown_proc_info[] = { 1772 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1773 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 1774 { 0 } 1775 }; 1776 static struct procunit_value_info prologic_proc_info[] = { 1777 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1778 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, 1779 { 0 } 1780 }; 1781 static struct procunit_value_info threed_enh_proc_info[] = { 1782 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1783 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 }, 1784 { 0 } 1785 }; 1786 static struct procunit_value_info reverb_proc_info[] = { 1787 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1788 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, 1789 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 }, 1790 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 }, 1791 { 0 } 1792 }; 1793 static struct procunit_value_info chorus_proc_info[] = { 1794 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1795 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, 1796 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, 1797 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, 1798 { 0 } 1799 }; 1800 static struct procunit_value_info dcr_proc_info[] = { 1801 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN }, 1802 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 }, 1803 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 }, 1804 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, 1805 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 }, 1806 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 }, 1807 { 0 } 1808 }; 1809 1810 static struct procunit_info procunits[] = { 1811 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info }, 1812 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info }, 1813 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info }, 1814 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info }, 1815 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info }, 1816 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info }, 1817 { 0 }, 1818 }; 1819 /* 1820 * predefined data for extension units 1821 */ 1822 static struct procunit_value_info clock_rate_xu_info[] = { 1823 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, 1824 { 0 } 1825 }; 1826 static struct procunit_value_info clock_source_xu_info[] = { 1827 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, 1828 { 0 } 1829 }; 1830 static struct procunit_value_info spdif_format_xu_info[] = { 1831 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, 1832 { 0 } 1833 }; 1834 static struct procunit_value_info soft_limit_xu_info[] = { 1835 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, 1836 { 0 } 1837 }; 1838 static struct procunit_info extunits[] = { 1839 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info }, 1840 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info }, 1841 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info }, 1842 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info }, 1843 { 0 } 1844 }; 1845 1846 /* 1847 * build a processing/extension unit 1848 */ 1849 static int build_audio_procunit(struct mixer_build *state, int unitid, 1850 void *raw_desc, struct procunit_info *list, 1851 char *name) 1852 { 1853 struct uac_processing_unit_descriptor *desc = raw_desc; 1854 int num_ins = desc->bNrInPins; 1855 struct usb_mixer_elem_info *cval; 1856 struct snd_kcontrol *kctl; 1857 int i, err, nameid, type, len; 1858 struct procunit_info *info; 1859 struct procunit_value_info *valinfo; 1860 const struct usbmix_name_map *map; 1861 static struct procunit_value_info default_value_info[] = { 1862 { 0x01, "Switch", USB_MIXER_BOOLEAN }, 1863 { 0 } 1864 }; 1865 static struct procunit_info default_info = { 1866 0, NULL, default_value_info 1867 }; 1868 1869 if (desc->bLength < 13 || desc->bLength < 13 + num_ins || 1870 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { 1871 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); 1872 return -EINVAL; 1873 } 1874 1875 for (i = 0; i < num_ins; i++) { 1876 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 1877 return err; 1878 } 1879 1880 type = le16_to_cpu(desc->wProcessType); 1881 for (info = list; info && info->type; info++) 1882 if (info->type == type) 1883 break; 1884 if (!info || !info->type) 1885 info = &default_info; 1886 1887 for (valinfo = info->values; valinfo->control; valinfo++) { 1888 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol); 1889 1890 if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1)))) 1891 continue; 1892 map = find_map(state, unitid, valinfo->control); 1893 if (check_ignored_ctl(map)) 1894 continue; 1895 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1896 if (!cval) 1897 return -ENOMEM; 1898 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 1899 cval->control = valinfo->control; 1900 cval->val_type = valinfo->val_type; 1901 cval->channels = 1; 1902 1903 /* get min/max values */ 1904 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) { 1905 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol); 1906 /* FIXME: hard-coded */ 1907 cval->min = 1; 1908 cval->max = control_spec[0]; 1909 cval->res = 1; 1910 cval->initialized = 1; 1911 } else { 1912 if (type == USB_XU_CLOCK_RATE) { 1913 /* 1914 * E-Mu USB 0404/0202/TrackerPre/0204 1915 * samplerate control quirk 1916 */ 1917 cval->min = 0; 1918 cval->max = 5; 1919 cval->res = 1; 1920 cval->initialized = 1; 1921 } else 1922 get_min_max(cval, valinfo->min_value); 1923 } 1924 1925 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); 1926 if (!kctl) { 1927 kfree(cval); 1928 return -ENOMEM; 1929 } 1930 kctl->private_free = snd_usb_mixer_elem_free; 1931 1932 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) { 1933 /* nothing */ ; 1934 } else if (info->name) { 1935 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name)); 1936 } else { 1937 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); 1938 len = 0; 1939 if (nameid) 1940 len = snd_usb_copy_string_desc(state, nameid, 1941 kctl->id.name, 1942 sizeof(kctl->id.name)); 1943 if (!len) 1944 strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); 1945 } 1946 append_ctl_name(kctl, " "); 1947 append_ctl_name(kctl, valinfo->suffix); 1948 1949 usb_audio_dbg(state->chip, 1950 "[%d] PU [%s] ch = %d, val = %d/%d\n", 1951 cval->head.id, kctl->id.name, cval->channels, 1952 cval->min, cval->max); 1953 1954 err = snd_usb_mixer_add_control(&cval->head, kctl); 1955 if (err < 0) 1956 return err; 1957 } 1958 return 0; 1959 } 1960 1961 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, 1962 void *raw_desc) 1963 { 1964 return build_audio_procunit(state, unitid, raw_desc, 1965 procunits, "Processing Unit"); 1966 } 1967 1968 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, 1969 void *raw_desc) 1970 { 1971 /* 1972 * Note that we parse extension units with processing unit descriptors. 1973 * That's ok as the layout is the same. 1974 */ 1975 return build_audio_procunit(state, unitid, raw_desc, 1976 extunits, "Extension Unit"); 1977 } 1978 1979 /* 1980 * Selector Unit 1981 */ 1982 1983 /* 1984 * info callback for selector unit 1985 * use an enumerator type for routing 1986 */ 1987 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, 1988 struct snd_ctl_elem_info *uinfo) 1989 { 1990 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1991 const char **itemlist = (const char **)kcontrol->private_value; 1992 1993 if (snd_BUG_ON(!itemlist)) 1994 return -EINVAL; 1995 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist); 1996 } 1997 1998 /* get callback for selector unit */ 1999 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, 2000 struct snd_ctl_elem_value *ucontrol) 2001 { 2002 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2003 int val, err; 2004 2005 err = get_cur_ctl_value(cval, cval->control << 8, &val); 2006 if (err < 0) { 2007 ucontrol->value.enumerated.item[0] = 0; 2008 return filter_error(cval, err); 2009 } 2010 val = get_relative_value(cval, val); 2011 ucontrol->value.enumerated.item[0] = val; 2012 return 0; 2013 } 2014 2015 /* put callback for selector unit */ 2016 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, 2017 struct snd_ctl_elem_value *ucontrol) 2018 { 2019 struct usb_mixer_elem_info *cval = kcontrol->private_data; 2020 int val, oval, err; 2021 2022 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 2023 if (err < 0) 2024 return filter_error(cval, err); 2025 val = ucontrol->value.enumerated.item[0]; 2026 val = get_abs_value(cval, val); 2027 if (val != oval) { 2028 set_cur_ctl_value(cval, cval->control << 8, val); 2029 return 1; 2030 } 2031 return 0; 2032 } 2033 2034 /* alsa control interface for selector unit */ 2035 static struct snd_kcontrol_new mixer_selectunit_ctl = { 2036 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 2037 .name = "", /* will be filled later */ 2038 .info = mixer_ctl_selector_info, 2039 .get = mixer_ctl_selector_get, 2040 .put = mixer_ctl_selector_put, 2041 }; 2042 2043 /* 2044 * private free callback. 2045 * free both private_data and private_value 2046 */ 2047 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) 2048 { 2049 int i, num_ins = 0; 2050 2051 if (kctl->private_data) { 2052 struct usb_mixer_elem_info *cval = kctl->private_data; 2053 num_ins = cval->max; 2054 kfree(cval); 2055 kctl->private_data = NULL; 2056 } 2057 if (kctl->private_value) { 2058 char **itemlist = (char **)kctl->private_value; 2059 for (i = 0; i < num_ins; i++) 2060 kfree(itemlist[i]); 2061 kfree(itemlist); 2062 kctl->private_value = 0; 2063 } 2064 } 2065 2066 /* 2067 * parse a selector unit 2068 */ 2069 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, 2070 void *raw_desc) 2071 { 2072 struct uac_selector_unit_descriptor *desc = raw_desc; 2073 unsigned int i, nameid, len; 2074 int err; 2075 struct usb_mixer_elem_info *cval; 2076 struct snd_kcontrol *kctl; 2077 const struct usbmix_name_map *map; 2078 char **namelist; 2079 2080 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) { 2081 usb_audio_err(state->chip, 2082 "invalid SELECTOR UNIT descriptor %d\n", unitid); 2083 return -EINVAL; 2084 } 2085 2086 for (i = 0; i < desc->bNrInPins; i++) { 2087 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 2088 return err; 2089 } 2090 2091 if (desc->bNrInPins == 1) /* only one ? nonsense! */ 2092 return 0; 2093 2094 map = find_map(state, unitid, 0); 2095 if (check_ignored_ctl(map)) 2096 return 0; 2097 2098 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 2099 if (!cval) 2100 return -ENOMEM; 2101 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); 2102 cval->val_type = USB_MIXER_U8; 2103 cval->channels = 1; 2104 cval->min = 1; 2105 cval->max = desc->bNrInPins; 2106 cval->res = 1; 2107 cval->initialized = 1; 2108 2109 if (state->mixer->protocol == UAC_VERSION_1) 2110 cval->control = 0; 2111 else /* UAC_VERSION_2 */ 2112 cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ? 2113 UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR; 2114 2115 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL); 2116 if (!namelist) { 2117 kfree(cval); 2118 return -ENOMEM; 2119 } 2120 #define MAX_ITEM_NAME_LEN 64 2121 for (i = 0; i < desc->bNrInPins; i++) { 2122 struct usb_audio_term iterm; 2123 len = 0; 2124 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); 2125 if (!namelist[i]) { 2126 while (i--) 2127 kfree(namelist[i]); 2128 kfree(namelist); 2129 kfree(cval); 2130 return -ENOMEM; 2131 } 2132 len = check_mapped_selector_name(state, unitid, i, namelist[i], 2133 MAX_ITEM_NAME_LEN); 2134 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0) 2135 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0); 2136 if (! len) 2137 sprintf(namelist[i], "Input %u", i); 2138 } 2139 2140 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); 2141 if (! kctl) { 2142 usb_audio_err(state->chip, "cannot malloc kcontrol\n"); 2143 kfree(namelist); 2144 kfree(cval); 2145 return -ENOMEM; 2146 } 2147 kctl->private_value = (unsigned long)namelist; 2148 kctl->private_free = usb_mixer_selector_elem_free; 2149 2150 nameid = uac_selector_unit_iSelector(desc); 2151 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 2152 if (len) 2153 ; 2154 else if (nameid) 2155 snd_usb_copy_string_desc(state, nameid, kctl->id.name, 2156 sizeof(kctl->id.name)); 2157 else { 2158 len = get_term_name(state, &state->oterm, 2159 kctl->id.name, sizeof(kctl->id.name), 0); 2160 if (!len) 2161 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name)); 2162 2163 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) 2164 append_ctl_name(kctl, " Clock Source"); 2165 else if ((state->oterm.type & 0xff00) == 0x0100) 2166 append_ctl_name(kctl, " Capture Source"); 2167 else 2168 append_ctl_name(kctl, " Playback Source"); 2169 } 2170 2171 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n", 2172 cval->head.id, kctl->id.name, desc->bNrInPins); 2173 return snd_usb_mixer_add_control(&cval->head, kctl); 2174 } 2175 2176 /* 2177 * parse an audio unit recursively 2178 */ 2179 2180 static int parse_audio_unit(struct mixer_build *state, int unitid) 2181 { 2182 unsigned char *p1; 2183 2184 if (test_and_set_bit(unitid, state->unitbitmap)) 2185 return 0; /* the unit already visited */ 2186 2187 p1 = find_audio_control_unit(state, unitid); 2188 if (!p1) { 2189 usb_audio_err(state->chip, "unit %d not found!\n", unitid); 2190 return -EINVAL; 2191 } 2192 2193 switch (p1[2]) { 2194 case UAC_INPUT_TERMINAL: 2195 return 0; /* NOP */ 2196 case UAC_MIXER_UNIT: 2197 return parse_audio_mixer_unit(state, unitid, p1); 2198 case UAC2_CLOCK_SOURCE: 2199 return parse_clock_source_unit(state, unitid, p1); 2200 case UAC_SELECTOR_UNIT: 2201 case UAC2_CLOCK_SELECTOR: 2202 return parse_audio_selector_unit(state, unitid, p1); 2203 case UAC_FEATURE_UNIT: 2204 return parse_audio_feature_unit(state, unitid, p1); 2205 case UAC1_PROCESSING_UNIT: 2206 /* UAC2_EFFECT_UNIT has the same value */ 2207 if (state->mixer->protocol == UAC_VERSION_1) 2208 return parse_audio_processing_unit(state, unitid, p1); 2209 else 2210 return 0; /* FIXME - effect units not implemented yet */ 2211 case UAC1_EXTENSION_UNIT: 2212 /* UAC2_PROCESSING_UNIT_V2 has the same value */ 2213 if (state->mixer->protocol == UAC_VERSION_1) 2214 return parse_audio_extension_unit(state, unitid, p1); 2215 else /* UAC_VERSION_2 */ 2216 return parse_audio_processing_unit(state, unitid, p1); 2217 case UAC2_EXTENSION_UNIT_V2: 2218 return parse_audio_extension_unit(state, unitid, p1); 2219 default: 2220 usb_audio_err(state->chip, 2221 "unit %u: unexpected type 0x%02x\n", unitid, p1[2]); 2222 return -EINVAL; 2223 } 2224 } 2225 2226 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer) 2227 { 2228 kfree(mixer->id_elems); 2229 if (mixer->urb) { 2230 kfree(mixer->urb->transfer_buffer); 2231 usb_free_urb(mixer->urb); 2232 } 2233 usb_free_urb(mixer->rc_urb); 2234 kfree(mixer->rc_setup_packet); 2235 kfree(mixer); 2236 } 2237 2238 static int snd_usb_mixer_dev_free(struct snd_device *device) 2239 { 2240 struct usb_mixer_interface *mixer = device->device_data; 2241 snd_usb_mixer_free(mixer); 2242 return 0; 2243 } 2244 2245 /* 2246 * create mixer controls 2247 * 2248 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers 2249 */ 2250 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) 2251 { 2252 struct mixer_build state; 2253 int err; 2254 const struct usbmix_ctl_map *map; 2255 void *p; 2256 2257 memset(&state, 0, sizeof(state)); 2258 state.chip = mixer->chip; 2259 state.mixer = mixer; 2260 state.buffer = mixer->hostif->extra; 2261 state.buflen = mixer->hostif->extralen; 2262 2263 /* check the mapping table */ 2264 for (map = usbmix_ctl_maps; map->id; map++) { 2265 if (map->id == state.chip->usb_id) { 2266 state.map = map->map; 2267 state.selector_map = map->selector_map; 2268 mixer->ignore_ctl_error = map->ignore_ctl_error; 2269 break; 2270 } 2271 } 2272 2273 p = NULL; 2274 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, 2275 mixer->hostif->extralen, 2276 p, UAC_OUTPUT_TERMINAL)) != NULL) { 2277 if (mixer->protocol == UAC_VERSION_1) { 2278 struct uac1_output_terminal_descriptor *desc = p; 2279 2280 if (desc->bLength < sizeof(*desc)) 2281 continue; /* invalid descriptor? */ 2282 /* mark terminal ID as visited */ 2283 set_bit(desc->bTerminalID, state.unitbitmap); 2284 state.oterm.id = desc->bTerminalID; 2285 state.oterm.type = le16_to_cpu(desc->wTerminalType); 2286 state.oterm.name = desc->iTerminal; 2287 err = parse_audio_unit(&state, desc->bSourceID); 2288 if (err < 0 && err != -EINVAL) 2289 return err; 2290 } else { /* UAC_VERSION_2 */ 2291 struct uac2_output_terminal_descriptor *desc = p; 2292 2293 if (desc->bLength < sizeof(*desc)) 2294 continue; /* invalid descriptor? */ 2295 /* mark terminal ID as visited */ 2296 set_bit(desc->bTerminalID, state.unitbitmap); 2297 state.oterm.id = desc->bTerminalID; 2298 state.oterm.type = le16_to_cpu(desc->wTerminalType); 2299 state.oterm.name = desc->iTerminal; 2300 err = parse_audio_unit(&state, desc->bSourceID); 2301 if (err < 0 && err != -EINVAL) 2302 return err; 2303 2304 /* 2305 * For UAC2, use the same approach to also add the 2306 * clock selectors 2307 */ 2308 err = parse_audio_unit(&state, desc->bCSourceID); 2309 if (err < 0 && err != -EINVAL) 2310 return err; 2311 } 2312 } 2313 2314 return 0; 2315 } 2316 2317 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) 2318 { 2319 struct usb_mixer_elem_list *list; 2320 2321 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) 2322 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 2323 &list->kctl->id); 2324 } 2325 2326 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer, 2327 struct usb_mixer_elem_list *list) 2328 { 2329 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list; 2330 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN", 2331 "S8", "U8", "S16", "U16"}; 2332 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, " 2333 "channels=%i, type=\"%s\"\n", cval->head.id, 2334 cval->control, cval->cmask, cval->channels, 2335 val_types[cval->val_type]); 2336 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n", 2337 cval->min, cval->max, cval->dBmin, cval->dBmax); 2338 } 2339 2340 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, 2341 struct snd_info_buffer *buffer) 2342 { 2343 struct snd_usb_audio *chip = entry->private_data; 2344 struct usb_mixer_interface *mixer; 2345 struct usb_mixer_elem_list *list; 2346 int unitid; 2347 2348 list_for_each_entry(mixer, &chip->mixer_list, list) { 2349 snd_iprintf(buffer, 2350 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n", 2351 chip->usb_id, snd_usb_ctrl_intf(chip), 2352 mixer->ignore_ctl_error); 2353 snd_iprintf(buffer, "Card: %s\n", chip->card->longname); 2354 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { 2355 for (list = mixer->id_elems[unitid]; list; 2356 list = list->next_id_elem) { 2357 snd_iprintf(buffer, " Unit: %i\n", list->id); 2358 if (list->kctl) 2359 snd_iprintf(buffer, 2360 " Control: name=\"%s\", index=%i\n", 2361 list->kctl->id.name, 2362 list->kctl->id.index); 2363 if (list->dump) 2364 list->dump(buffer, list); 2365 } 2366 } 2367 } 2368 } 2369 2370 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer, 2371 int attribute, int value, int index) 2372 { 2373 struct usb_mixer_elem_list *list; 2374 __u8 unitid = (index >> 8) & 0xff; 2375 __u8 control = (value >> 8) & 0xff; 2376 __u8 channel = value & 0xff; 2377 unsigned int count = 0; 2378 2379 if (channel >= MAX_CHANNELS) { 2380 usb_audio_dbg(mixer->chip, 2381 "%s(): bogus channel number %d\n", 2382 __func__, channel); 2383 return; 2384 } 2385 2386 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) 2387 count++; 2388 2389 if (count == 0) 2390 return; 2391 2392 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) { 2393 struct usb_mixer_elem_info *info; 2394 2395 if (!list->kctl) 2396 continue; 2397 2398 info = (struct usb_mixer_elem_info *)list; 2399 if (count > 1 && info->control != control) 2400 continue; 2401 2402 switch (attribute) { 2403 case UAC2_CS_CUR: 2404 /* invalidate cache, so the value is read from the device */ 2405 if (channel) 2406 info->cached &= ~(1 << channel); 2407 else /* master channel */ 2408 info->cached = 0; 2409 2410 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 2411 &info->head.kctl->id); 2412 break; 2413 2414 case UAC2_CS_RANGE: 2415 /* TODO */ 2416 break; 2417 2418 case UAC2_CS_MEM: 2419 /* TODO */ 2420 break; 2421 2422 default: 2423 usb_audio_dbg(mixer->chip, 2424 "unknown attribute %d in interrupt\n", 2425 attribute); 2426 break; 2427 } /* switch */ 2428 } 2429 } 2430 2431 static void snd_usb_mixer_interrupt(struct urb *urb) 2432 { 2433 struct usb_mixer_interface *mixer = urb->context; 2434 int len = urb->actual_length; 2435 int ustatus = urb->status; 2436 2437 if (ustatus != 0) 2438 goto requeue; 2439 2440 if (mixer->protocol == UAC_VERSION_1) { 2441 struct uac1_status_word *status; 2442 2443 for (status = urb->transfer_buffer; 2444 len >= sizeof(*status); 2445 len -= sizeof(*status), status++) { 2446 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n", 2447 status->bStatusType, 2448 status->bOriginator); 2449 2450 /* ignore any notifications not from the control interface */ 2451 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) != 2452 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF) 2453 continue; 2454 2455 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED) 2456 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator); 2457 else 2458 snd_usb_mixer_notify_id(mixer, status->bOriginator); 2459 } 2460 } else { /* UAC_VERSION_2 */ 2461 struct uac2_interrupt_data_msg *msg; 2462 2463 for (msg = urb->transfer_buffer; 2464 len >= sizeof(*msg); 2465 len -= sizeof(*msg), msg++) { 2466 /* drop vendor specific and endpoint requests */ 2467 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) || 2468 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP)) 2469 continue; 2470 2471 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute, 2472 le16_to_cpu(msg->wValue), 2473 le16_to_cpu(msg->wIndex)); 2474 } 2475 } 2476 2477 requeue: 2478 if (ustatus != -ENOENT && 2479 ustatus != -ECONNRESET && 2480 ustatus != -ESHUTDOWN) { 2481 urb->dev = mixer->chip->dev; 2482 usb_submit_urb(urb, GFP_ATOMIC); 2483 } 2484 } 2485 2486 /* create the handler for the optional status interrupt endpoint */ 2487 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer) 2488 { 2489 struct usb_endpoint_descriptor *ep; 2490 void *transfer_buffer; 2491 int buffer_length; 2492 unsigned int epnum; 2493 2494 /* we need one interrupt input endpoint */ 2495 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1) 2496 return 0; 2497 ep = get_endpoint(mixer->hostif, 0); 2498 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep)) 2499 return 0; 2500 2501 epnum = usb_endpoint_num(ep); 2502 buffer_length = le16_to_cpu(ep->wMaxPacketSize); 2503 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL); 2504 if (!transfer_buffer) 2505 return -ENOMEM; 2506 mixer->urb = usb_alloc_urb(0, GFP_KERNEL); 2507 if (!mixer->urb) { 2508 kfree(transfer_buffer); 2509 return -ENOMEM; 2510 } 2511 usb_fill_int_urb(mixer->urb, mixer->chip->dev, 2512 usb_rcvintpipe(mixer->chip->dev, epnum), 2513 transfer_buffer, buffer_length, 2514 snd_usb_mixer_interrupt, mixer, ep->bInterval); 2515 usb_submit_urb(mixer->urb, GFP_KERNEL); 2516 return 0; 2517 } 2518 2519 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, 2520 int ignore_error) 2521 { 2522 static struct snd_device_ops dev_ops = { 2523 .dev_free = snd_usb_mixer_dev_free 2524 }; 2525 struct usb_mixer_interface *mixer; 2526 struct snd_info_entry *entry; 2527 int err; 2528 2529 strcpy(chip->card->mixername, "USB Mixer"); 2530 2531 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL); 2532 if (!mixer) 2533 return -ENOMEM; 2534 mixer->chip = chip; 2535 mixer->ignore_ctl_error = ignore_error; 2536 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems), 2537 GFP_KERNEL); 2538 if (!mixer->id_elems) { 2539 kfree(mixer); 2540 return -ENOMEM; 2541 } 2542 2543 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0]; 2544 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) { 2545 case UAC_VERSION_1: 2546 default: 2547 mixer->protocol = UAC_VERSION_1; 2548 break; 2549 case UAC_VERSION_2: 2550 mixer->protocol = UAC_VERSION_2; 2551 break; 2552 } 2553 2554 if ((err = snd_usb_mixer_controls(mixer)) < 0 || 2555 (err = snd_usb_mixer_status_create(mixer)) < 0) 2556 goto _error; 2557 2558 snd_usb_mixer_apply_create_quirk(mixer); 2559 2560 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops); 2561 if (err < 0) 2562 goto _error; 2563 2564 if (list_empty(&chip->mixer_list) && 2565 !snd_card_proc_new(chip->card, "usbmixer", &entry)) 2566 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read); 2567 2568 list_add(&mixer->list, &chip->mixer_list); 2569 return 0; 2570 2571 _error: 2572 snd_usb_mixer_free(mixer); 2573 return err; 2574 } 2575 2576 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer) 2577 { 2578 usb_kill_urb(mixer->urb); 2579 usb_kill_urb(mixer->rc_urb); 2580 } 2581 2582 #ifdef CONFIG_PM 2583 /* stop any bus activity of a mixer */ 2584 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer) 2585 { 2586 usb_kill_urb(mixer->urb); 2587 usb_kill_urb(mixer->rc_urb); 2588 } 2589 2590 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer) 2591 { 2592 int err; 2593 2594 if (mixer->urb) { 2595 err = usb_submit_urb(mixer->urb, GFP_NOIO); 2596 if (err < 0) 2597 return err; 2598 } 2599 2600 return 0; 2601 } 2602 2603 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer) 2604 { 2605 snd_usb_mixer_inactivate(mixer); 2606 return 0; 2607 } 2608 2609 static int restore_mixer_value(struct usb_mixer_elem_list *list) 2610 { 2611 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list; 2612 int c, err, idx; 2613 2614 if (cval->cmask) { 2615 idx = 0; 2616 for (c = 0; c < MAX_CHANNELS; c++) { 2617 if (!(cval->cmask & (1 << c))) 2618 continue; 2619 if (cval->cached & (1 << (c + 1))) { 2620 err = snd_usb_set_cur_mix_value(cval, c + 1, idx, 2621 cval->cache_val[idx]); 2622 if (err < 0) 2623 return err; 2624 } 2625 idx++; 2626 } 2627 } else { 2628 /* master */ 2629 if (cval->cached) { 2630 err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val); 2631 if (err < 0) 2632 return err; 2633 } 2634 } 2635 2636 return 0; 2637 } 2638 2639 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume) 2640 { 2641 struct usb_mixer_elem_list *list; 2642 int id, err; 2643 2644 if (reset_resume) { 2645 /* restore cached mixer values */ 2646 for (id = 0; id < MAX_ID_ELEMS; id++) { 2647 for (list = mixer->id_elems[id]; list; 2648 list = list->next_id_elem) { 2649 if (list->resume) { 2650 err = list->resume(list); 2651 if (err < 0) 2652 return err; 2653 } 2654 } 2655 } 2656 } 2657 2658 return snd_usb_mixer_activate(mixer); 2659 } 2660 #endif 2661 2662 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, 2663 struct usb_mixer_interface *mixer, 2664 int unitid) 2665 { 2666 list->mixer = mixer; 2667 list->id = unitid; 2668 list->dump = snd_usb_mixer_dump_cval; 2669 #ifdef CONFIG_PM 2670 list->resume = restore_mixer_value; 2671 #endif 2672 } 2673