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