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 #include <linux/bitops.h> 30 #include <linux/init.h> 31 #include <linux/list.h> 32 #include <linux/slab.h> 33 #include <linux/string.h> 34 #include <linux/usb.h> 35 #include <linux/usb/audio.h> 36 #include <linux/usb/audio-v2.h> 37 38 #include <sound/core.h> 39 #include <sound/control.h> 40 #include <sound/hwdep.h> 41 #include <sound/info.h> 42 #include <sound/tlv.h> 43 44 #include "usbaudio.h" 45 #include "mixer.h" 46 #include "helper.h" 47 #include "mixer_quirks.h" 48 49 #define MAX_ID_ELEMS 256 50 51 struct usb_audio_term { 52 int id; 53 int type; 54 int channels; 55 unsigned int chconfig; 56 int name; 57 }; 58 59 struct usbmix_name_map; 60 61 struct mixer_build { 62 struct snd_usb_audio *chip; 63 struct usb_mixer_interface *mixer; 64 unsigned char *buffer; 65 unsigned int buflen; 66 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS); 67 struct usb_audio_term oterm; 68 const struct usbmix_name_map *map; 69 const struct usbmix_selector_map *selector_map; 70 }; 71 72 enum { 73 USB_MIXER_BOOLEAN, 74 USB_MIXER_INV_BOOLEAN, 75 USB_MIXER_S8, 76 USB_MIXER_U8, 77 USB_MIXER_S16, 78 USB_MIXER_U16, 79 }; 80 81 enum { 82 USB_PROC_UPDOWN = 1, 83 USB_PROC_UPDOWN_SWITCH = 1, 84 USB_PROC_UPDOWN_MODE_SEL = 2, 85 86 USB_PROC_PROLOGIC = 2, 87 USB_PROC_PROLOGIC_SWITCH = 1, 88 USB_PROC_PROLOGIC_MODE_SEL = 2, 89 90 USB_PROC_3DENH = 3, 91 USB_PROC_3DENH_SWITCH = 1, 92 USB_PROC_3DENH_SPACE = 2, 93 94 USB_PROC_REVERB = 4, 95 USB_PROC_REVERB_SWITCH = 1, 96 USB_PROC_REVERB_LEVEL = 2, 97 USB_PROC_REVERB_TIME = 3, 98 USB_PROC_REVERB_DELAY = 4, 99 100 USB_PROC_CHORUS = 5, 101 USB_PROC_CHORUS_SWITCH = 1, 102 USB_PROC_CHORUS_LEVEL = 2, 103 USB_PROC_CHORUS_RATE = 3, 104 USB_PROC_CHORUS_DEPTH = 4, 105 106 USB_PROC_DCR = 6, 107 USB_PROC_DCR_SWITCH = 1, 108 USB_PROC_DCR_RATIO = 2, 109 USB_PROC_DCR_MAX_AMP = 3, 110 USB_PROC_DCR_THRESHOLD = 4, 111 USB_PROC_DCR_ATTACK = 5, 112 USB_PROC_DCR_RELEASE = 6, 113 }; 114 115 /*E-mu 0202(0404) eXtension Unit(XU) control*/ 116 enum { 117 USB_XU_CLOCK_RATE = 0xe301, 118 USB_XU_CLOCK_SOURCE = 0xe302, 119 USB_XU_DIGITAL_IO_STATUS = 0xe303, 120 USB_XU_DEVICE_OPTIONS = 0xe304, 121 USB_XU_DIRECT_MONITORING = 0xe305, 122 USB_XU_METERING = 0xe306 123 }; 124 enum { 125 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/ 126 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */ 127 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */ 128 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */ 129 }; 130 131 /* 132 * manual mapping of mixer names 133 * if the mixer topology is too complicated and the parsed names are 134 * ambiguous, add the entries in usbmixer_maps.c. 135 */ 136 #include "mixer_maps.c" 137 138 static const struct usbmix_name_map * 139 find_map(struct mixer_build *state, int unitid, int control) 140 { 141 const struct usbmix_name_map *p = state->map; 142 143 if (!p) 144 return NULL; 145 146 for (p = state->map; p->id; p++) { 147 if (p->id == unitid && 148 (!control || !p->control || control == p->control)) 149 return p; 150 } 151 return NULL; 152 } 153 154 /* get the mapped name if the unit matches */ 155 static int 156 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen) 157 { 158 if (!p || !p->name) 159 return 0; 160 161 buflen--; 162 return strlcpy(buf, p->name, buflen); 163 } 164 165 /* check whether the control should be ignored */ 166 static inline int 167 check_ignored_ctl(const struct usbmix_name_map *p) 168 { 169 if (!p || p->name || p->dB) 170 return 0; 171 return 1; 172 } 173 174 /* dB mapping */ 175 static inline void check_mapped_dB(const struct usbmix_name_map *p, 176 struct usb_mixer_elem_info *cval) 177 { 178 if (p && p->dB) { 179 cval->dBmin = p->dB->min; 180 cval->dBmax = p->dB->max; 181 } 182 } 183 184 /* get the mapped selector source name */ 185 static int check_mapped_selector_name(struct mixer_build *state, int unitid, 186 int index, char *buf, int buflen) 187 { 188 const struct usbmix_selector_map *p; 189 190 if (! state->selector_map) 191 return 0; 192 for (p = state->selector_map; p->id; p++) { 193 if (p->id == unitid && index < p->count) 194 return strlcpy(buf, p->names[index], buflen); 195 } 196 return 0; 197 } 198 199 /* 200 * find an audio control unit with the given unit id 201 * this doesn't return any clock related units, so they need to be handled elsewhere 202 */ 203 static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit) 204 { 205 unsigned char *p; 206 207 p = NULL; 208 while ((p = snd_usb_find_desc(state->buffer, state->buflen, p, 209 USB_DT_CS_INTERFACE)) != NULL) { 210 if (p[0] >= 4 && p[2] >= UAC_INPUT_TERMINAL && p[2] <= UAC2_EXTENSION_UNIT_V2 && p[3] == unit) 211 return p; 212 } 213 return NULL; 214 } 215 216 217 /* 218 * copy a string with the given id 219 */ 220 static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen) 221 { 222 int len = usb_string(state->chip->dev, index, buf, maxlen - 1); 223 buf[len] = 0; 224 return len; 225 } 226 227 /* 228 * convert from the byte/word on usb descriptor to the zero-based integer 229 */ 230 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val) 231 { 232 switch (cval->val_type) { 233 case USB_MIXER_BOOLEAN: 234 return !!val; 235 case USB_MIXER_INV_BOOLEAN: 236 return !val; 237 case USB_MIXER_U8: 238 val &= 0xff; 239 break; 240 case USB_MIXER_S8: 241 val &= 0xff; 242 if (val >= 0x80) 243 val -= 0x100; 244 break; 245 case USB_MIXER_U16: 246 val &= 0xffff; 247 break; 248 case USB_MIXER_S16: 249 val &= 0xffff; 250 if (val >= 0x8000) 251 val -= 0x10000; 252 break; 253 } 254 return val; 255 } 256 257 /* 258 * convert from the zero-based int to the byte/word for usb descriptor 259 */ 260 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val) 261 { 262 switch (cval->val_type) { 263 case USB_MIXER_BOOLEAN: 264 return !!val; 265 case USB_MIXER_INV_BOOLEAN: 266 return !val; 267 case USB_MIXER_S8: 268 case USB_MIXER_U8: 269 return val & 0xff; 270 case USB_MIXER_S16: 271 case USB_MIXER_U16: 272 return val & 0xffff; 273 } 274 return 0; /* not reached */ 275 } 276 277 static int get_relative_value(struct usb_mixer_elem_info *cval, int val) 278 { 279 if (! cval->res) 280 cval->res = 1; 281 if (val < cval->min) 282 return 0; 283 else if (val >= cval->max) 284 return (cval->max - cval->min + cval->res - 1) / cval->res; 285 else 286 return (val - cval->min) / cval->res; 287 } 288 289 static int get_abs_value(struct usb_mixer_elem_info *cval, int val) 290 { 291 if (val < 0) 292 return cval->min; 293 if (! cval->res) 294 cval->res = 1; 295 val *= cval->res; 296 val += cval->min; 297 if (val > cval->max) 298 return cval->max; 299 return val; 300 } 301 302 303 /* 304 * retrieve a mixer value 305 */ 306 307 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) 308 { 309 unsigned char buf[2]; 310 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 311 int timeout = 10; 312 313 while (timeout-- > 0) { 314 if (snd_usb_ctl_msg(cval->mixer->chip->dev, 315 usb_rcvctrlpipe(cval->mixer->chip->dev, 0), 316 request, 317 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 318 validx, cval->mixer->ctrlif | (cval->id << 8), 319 buf, val_len, 100) >= val_len) { 320 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); 321 return 0; 322 } 323 } 324 snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 325 request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type); 326 return -EINVAL; 327 } 328 329 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) 330 { 331 unsigned char buf[14]; /* enough space for one range of 4 bytes */ 332 unsigned char *val; 333 int ret; 334 __u8 bRequest; 335 336 bRequest = (request == UAC_GET_CUR) ? 337 UAC2_CS_CUR : UAC2_CS_RANGE; 338 339 ret = snd_usb_ctl_msg(cval->mixer->chip->dev, 340 usb_rcvctrlpipe(cval->mixer->chip->dev, 0), 341 bRequest, 342 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 343 validx, cval->mixer->ctrlif | (cval->id << 8), 344 buf, sizeof(buf), 1000); 345 346 if (ret < 0) { 347 snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", 348 request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type); 349 return ret; 350 } 351 352 switch (request) { 353 case UAC_GET_CUR: 354 val = buf; 355 break; 356 case UAC_GET_MIN: 357 val = buf + sizeof(__u16); 358 break; 359 case UAC_GET_MAX: 360 val = buf + sizeof(__u16) * 2; 361 break; 362 case UAC_GET_RES: 363 val = buf + sizeof(__u16) * 3; 364 break; 365 default: 366 return -EINVAL; 367 } 368 369 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16))); 370 371 return 0; 372 } 373 374 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) 375 { 376 return (cval->mixer->protocol == UAC_VERSION_1) ? 377 get_ctl_value_v1(cval, request, validx, value_ret) : 378 get_ctl_value_v2(cval, request, validx, value_ret); 379 } 380 381 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value) 382 { 383 return get_ctl_value(cval, UAC_GET_CUR, validx, value); 384 } 385 386 /* channel = 0: master, 1 = first channel */ 387 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval, 388 int channel, int *value) 389 { 390 return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value); 391 } 392 393 static int get_cur_mix_value(struct usb_mixer_elem_info *cval, 394 int channel, int index, int *value) 395 { 396 int err; 397 398 if (cval->cached & (1 << channel)) { 399 *value = cval->cache_val[index]; 400 return 0; 401 } 402 err = get_cur_mix_raw(cval, channel, value); 403 if (err < 0) { 404 if (!cval->mixer->ignore_ctl_error) 405 snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n", 406 cval->control, channel, err); 407 return err; 408 } 409 cval->cached |= 1 << channel; 410 cval->cache_val[index] = *value; 411 return 0; 412 } 413 414 415 /* 416 * set a mixer value 417 */ 418 419 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, 420 int request, int validx, int value_set) 421 { 422 unsigned char buf[2]; 423 int val_len, timeout = 10; 424 425 if (cval->mixer->protocol == UAC_VERSION_1) { 426 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; 427 } else { /* UAC_VERSION_2 */ 428 /* audio class v2 controls are always 2 bytes in size */ 429 val_len = sizeof(__u16); 430 431 /* FIXME */ 432 if (request != UAC_SET_CUR) { 433 snd_printdd(KERN_WARNING "RANGE setting not yet supported\n"); 434 return -EINVAL; 435 } 436 437 request = UAC2_CS_CUR; 438 } 439 440 value_set = convert_bytes_value(cval, value_set); 441 buf[0] = value_set & 0xff; 442 buf[1] = (value_set >> 8) & 0xff; 443 while (timeout-- > 0) 444 if (snd_usb_ctl_msg(cval->mixer->chip->dev, 445 usb_sndctrlpipe(cval->mixer->chip->dev, 0), 446 request, 447 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, 448 validx, cval->mixer->ctrlif | (cval->id << 8), 449 buf, val_len, 100) >= 0) 450 return 0; 451 snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", 452 request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]); 453 return -EINVAL; 454 } 455 456 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value) 457 { 458 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value); 459 } 460 461 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, 462 int index, int value) 463 { 464 int err; 465 err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel, 466 value); 467 if (err < 0) 468 return err; 469 cval->cached |= 1 << channel; 470 cval->cache_val[index] = value; 471 return 0; 472 } 473 474 /* 475 * TLV callback for mixer volume controls 476 */ 477 static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, 478 unsigned int size, unsigned int __user *_tlv) 479 { 480 struct usb_mixer_elem_info *cval = kcontrol->private_data; 481 DECLARE_TLV_DB_MINMAX(scale, 0, 0); 482 483 if (size < sizeof(scale)) 484 return -ENOMEM; 485 scale[2] = cval->dBmin; 486 scale[3] = cval->dBmax; 487 if (copy_to_user(_tlv, scale, sizeof(scale))) 488 return -EFAULT; 489 return 0; 490 } 491 492 /* 493 * parser routines begin here... 494 */ 495 496 static int parse_audio_unit(struct mixer_build *state, int unitid); 497 498 499 /* 500 * check if the input/output channel routing is enabled on the given bitmap. 501 * used for mixer unit parser 502 */ 503 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs) 504 { 505 int idx = ich * num_outs + och; 506 return bmap[idx >> 3] & (0x80 >> (idx & 7)); 507 } 508 509 510 /* 511 * add an alsa control element 512 * search and increment the index until an empty slot is found. 513 * 514 * if failed, give up and free the control instance. 515 */ 516 517 static int add_control_to_empty(struct mixer_build *state, struct snd_kcontrol *kctl) 518 { 519 struct usb_mixer_elem_info *cval = kctl->private_data; 520 int err; 521 522 while (snd_ctl_find_id(state->chip->card, &kctl->id)) 523 kctl->id.index++; 524 if ((err = snd_ctl_add(state->chip->card, kctl)) < 0) { 525 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err); 526 return err; 527 } 528 cval->elem_id = &kctl->id; 529 cval->next_id_elem = state->mixer->id_elems[cval->id]; 530 state->mixer->id_elems[cval->id] = cval; 531 return 0; 532 } 533 534 535 /* 536 * get a terminal name string 537 */ 538 539 static struct iterm_name_combo { 540 int type; 541 char *name; 542 } iterm_names[] = { 543 { 0x0300, "Output" }, 544 { 0x0301, "Speaker" }, 545 { 0x0302, "Headphone" }, 546 { 0x0303, "HMD Audio" }, 547 { 0x0304, "Desktop Speaker" }, 548 { 0x0305, "Room Speaker" }, 549 { 0x0306, "Com Speaker" }, 550 { 0x0307, "LFE" }, 551 { 0x0600, "External In" }, 552 { 0x0601, "Analog In" }, 553 { 0x0602, "Digital In" }, 554 { 0x0603, "Line" }, 555 { 0x0604, "Legacy In" }, 556 { 0x0605, "IEC958 In" }, 557 { 0x0606, "1394 DA Stream" }, 558 { 0x0607, "1394 DV Stream" }, 559 { 0x0700, "Embedded" }, 560 { 0x0701, "Noise Source" }, 561 { 0x0702, "Equalization Noise" }, 562 { 0x0703, "CD" }, 563 { 0x0704, "DAT" }, 564 { 0x0705, "DCC" }, 565 { 0x0706, "MiniDisk" }, 566 { 0x0707, "Analog Tape" }, 567 { 0x0708, "Phonograph" }, 568 { 0x0709, "VCR Audio" }, 569 { 0x070a, "Video Disk Audio" }, 570 { 0x070b, "DVD Audio" }, 571 { 0x070c, "TV Tuner Audio" }, 572 { 0x070d, "Satellite Rec Audio" }, 573 { 0x070e, "Cable Tuner Audio" }, 574 { 0x070f, "DSS Audio" }, 575 { 0x0710, "Radio Receiver" }, 576 { 0x0711, "Radio Transmitter" }, 577 { 0x0712, "Multi-Track Recorder" }, 578 { 0x0713, "Synthesizer" }, 579 { 0 }, 580 }; 581 582 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm, 583 unsigned char *name, int maxlen, int term_only) 584 { 585 struct iterm_name_combo *names; 586 587 if (iterm->name) 588 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen); 589 590 /* virtual type - not a real terminal */ 591 if (iterm->type >> 16) { 592 if (term_only) 593 return 0; 594 switch (iterm->type >> 16) { 595 case UAC_SELECTOR_UNIT: 596 strcpy(name, "Selector"); return 8; 597 case UAC_PROCESSING_UNIT_V1: 598 strcpy(name, "Process Unit"); return 12; 599 case UAC_EXTENSION_UNIT_V1: 600 strcpy(name, "Ext Unit"); return 8; 601 case UAC_MIXER_UNIT: 602 strcpy(name, "Mixer"); return 5; 603 default: 604 return sprintf(name, "Unit %d", iterm->id); 605 } 606 } 607 608 switch (iterm->type & 0xff00) { 609 case 0x0100: 610 strcpy(name, "PCM"); return 3; 611 case 0x0200: 612 strcpy(name, "Mic"); return 3; 613 case 0x0400: 614 strcpy(name, "Headset"); return 7; 615 case 0x0500: 616 strcpy(name, "Phone"); return 5; 617 } 618 619 for (names = iterm_names; names->type; names++) 620 if (names->type == iterm->type) { 621 strcpy(name, names->name); 622 return strlen(names->name); 623 } 624 return 0; 625 } 626 627 628 /* 629 * parse the source unit recursively until it reaches to a terminal 630 * or a branched unit. 631 */ 632 static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term) 633 { 634 void *p1; 635 636 memset(term, 0, sizeof(*term)); 637 while ((p1 = find_audio_control_unit(state, id)) != NULL) { 638 unsigned char *hdr = p1; 639 term->id = id; 640 switch (hdr[2]) { 641 case UAC_INPUT_TERMINAL: 642 if (state->mixer->protocol == UAC_VERSION_1) { 643 struct uac_input_terminal_descriptor *d = p1; 644 term->type = le16_to_cpu(d->wTerminalType); 645 term->channels = d->bNrChannels; 646 term->chconfig = le16_to_cpu(d->wChannelConfig); 647 term->name = d->iTerminal; 648 } else { /* UAC_VERSION_2 */ 649 struct uac2_input_terminal_descriptor *d = p1; 650 term->type = le16_to_cpu(d->wTerminalType); 651 term->channels = d->bNrChannels; 652 term->chconfig = le32_to_cpu(d->bmChannelConfig); 653 term->name = d->iTerminal; 654 } 655 return 0; 656 case UAC_FEATURE_UNIT: { 657 /* the header is the same for v1 and v2 */ 658 struct uac_feature_unit_descriptor *d = p1; 659 id = d->bUnitID; 660 break; /* continue to parse */ 661 } 662 case UAC_MIXER_UNIT: { 663 struct uac_mixer_unit_descriptor *d = p1; 664 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 665 term->channels = uac_mixer_unit_bNrChannels(d); 666 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol); 667 term->name = uac_mixer_unit_iMixer(d); 668 return 0; 669 } 670 case UAC_SELECTOR_UNIT: { 671 struct uac_selector_unit_descriptor *d = p1; 672 /* call recursively to retrieve the channel info */ 673 if (check_input_term(state, d->baSourceID[0], term) < 0) 674 return -ENODEV; 675 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 676 term->id = id; 677 term->name = uac_selector_unit_iSelector(d); 678 return 0; 679 } 680 case UAC_PROCESSING_UNIT_V1: 681 case UAC_EXTENSION_UNIT_V1: { 682 struct uac_processing_unit_descriptor *d = p1; 683 if (d->bNrInPins) { 684 id = d->baSourceID[0]; 685 break; /* continue to parse */ 686 } 687 term->type = d->bDescriptorSubtype << 16; /* virtual type */ 688 term->channels = uac_processing_unit_bNrChannels(d); 689 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol); 690 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol); 691 return 0; 692 } 693 default: 694 return -ENODEV; 695 } 696 } 697 return -ENODEV; 698 } 699 700 701 /* 702 * Feature Unit 703 */ 704 705 /* feature unit control information */ 706 struct usb_feature_control_info { 707 const char *name; 708 unsigned int type; /* control type (mute, volume, etc.) */ 709 }; 710 711 static struct usb_feature_control_info audio_feature_info[] = { 712 { "Mute", USB_MIXER_INV_BOOLEAN }, 713 { "Volume", USB_MIXER_S16 }, 714 { "Tone Control - Bass", USB_MIXER_S8 }, 715 { "Tone Control - Mid", USB_MIXER_S8 }, 716 { "Tone Control - Treble", USB_MIXER_S8 }, 717 { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */ 718 { "Auto Gain Control", USB_MIXER_BOOLEAN }, 719 { "Delay Control", USB_MIXER_U16 }, 720 { "Bass Boost", USB_MIXER_BOOLEAN }, 721 { "Loudness", USB_MIXER_BOOLEAN }, 722 }; 723 724 725 /* private_free callback */ 726 static void usb_mixer_elem_free(struct snd_kcontrol *kctl) 727 { 728 kfree(kctl->private_data); 729 kctl->private_data = NULL; 730 } 731 732 733 /* 734 * interface to ALSA control for feature/mixer units 735 */ 736 737 /* 738 * retrieve the minimum and maximum values for the specified control 739 */ 740 static int get_min_max(struct usb_mixer_elem_info *cval, int default_min) 741 { 742 /* for failsafe */ 743 cval->min = default_min; 744 cval->max = cval->min + 1; 745 cval->res = 1; 746 cval->dBmin = cval->dBmax = 0; 747 748 if (cval->val_type == USB_MIXER_BOOLEAN || 749 cval->val_type == USB_MIXER_INV_BOOLEAN) { 750 cval->initialized = 1; 751 } else { 752 int minchn = 0; 753 if (cval->cmask) { 754 int i; 755 for (i = 0; i < MAX_CHANNELS; i++) 756 if (cval->cmask & (1 << i)) { 757 minchn = i + 1; 758 break; 759 } 760 } 761 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 || 762 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) { 763 snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n", 764 cval->id, cval->mixer->ctrlif, cval->control, cval->id); 765 return -EINVAL; 766 } 767 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) { 768 cval->res = 1; 769 } else { 770 int last_valid_res = cval->res; 771 772 while (cval->res > 1) { 773 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES, 774 (cval->control << 8) | minchn, cval->res / 2) < 0) 775 break; 776 cval->res /= 2; 777 } 778 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) 779 cval->res = last_valid_res; 780 } 781 if (cval->res == 0) 782 cval->res = 1; 783 784 /* Additional checks for the proper resolution 785 * 786 * Some devices report smaller resolutions than actually 787 * reacting. They don't return errors but simply clip 788 * to the lower aligned value. 789 */ 790 if (cval->min + cval->res < cval->max) { 791 int last_valid_res = cval->res; 792 int saved, test, check; 793 get_cur_mix_raw(cval, minchn, &saved); 794 for (;;) { 795 test = saved; 796 if (test < cval->max) 797 test += cval->res; 798 else 799 test -= cval->res; 800 if (test < cval->min || test > cval->max || 801 set_cur_mix_value(cval, minchn, 0, test) || 802 get_cur_mix_raw(cval, minchn, &check)) { 803 cval->res = last_valid_res; 804 break; 805 } 806 if (test == check) 807 break; 808 cval->res *= 2; 809 } 810 set_cur_mix_value(cval, minchn, 0, saved); 811 } 812 813 cval->initialized = 1; 814 } 815 816 /* USB descriptions contain the dB scale in 1/256 dB unit 817 * while ALSA TLV contains in 1/100 dB unit 818 */ 819 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; 820 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; 821 if (cval->dBmin > cval->dBmax) { 822 /* something is wrong; assume it's either from/to 0dB */ 823 if (cval->dBmin < 0) 824 cval->dBmax = 0; 825 else if (cval->dBmin > 0) 826 cval->dBmin = 0; 827 if (cval->dBmin > cval->dBmax) { 828 /* totally crap, return an error */ 829 return -EINVAL; 830 } 831 } 832 833 return 0; 834 } 835 836 837 /* get a feature/mixer unit info */ 838 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 839 { 840 struct usb_mixer_elem_info *cval = kcontrol->private_data; 841 842 if (cval->val_type == USB_MIXER_BOOLEAN || 843 cval->val_type == USB_MIXER_INV_BOOLEAN) 844 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 845 else 846 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 847 uinfo->count = cval->channels; 848 if (cval->val_type == USB_MIXER_BOOLEAN || 849 cval->val_type == USB_MIXER_INV_BOOLEAN) { 850 uinfo->value.integer.min = 0; 851 uinfo->value.integer.max = 1; 852 } else { 853 if (! cval->initialized) 854 get_min_max(cval, 0); 855 uinfo->value.integer.min = 0; 856 uinfo->value.integer.max = 857 (cval->max - cval->min + cval->res - 1) / cval->res; 858 } 859 return 0; 860 } 861 862 /* get the current value from feature/mixer unit */ 863 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 864 { 865 struct usb_mixer_elem_info *cval = kcontrol->private_data; 866 int c, cnt, val, err; 867 868 ucontrol->value.integer.value[0] = cval->min; 869 if (cval->cmask) { 870 cnt = 0; 871 for (c = 0; c < MAX_CHANNELS; c++) { 872 if (!(cval->cmask & (1 << c))) 873 continue; 874 err = get_cur_mix_value(cval, c + 1, cnt, &val); 875 if (err < 0) 876 return cval->mixer->ignore_ctl_error ? 0 : err; 877 val = get_relative_value(cval, val); 878 ucontrol->value.integer.value[cnt] = val; 879 cnt++; 880 } 881 return 0; 882 } else { 883 /* master channel */ 884 err = get_cur_mix_value(cval, 0, 0, &val); 885 if (err < 0) 886 return cval->mixer->ignore_ctl_error ? 0 : err; 887 val = get_relative_value(cval, val); 888 ucontrol->value.integer.value[0] = val; 889 } 890 return 0; 891 } 892 893 /* put the current value to feature/mixer unit */ 894 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 895 { 896 struct usb_mixer_elem_info *cval = kcontrol->private_data; 897 int c, cnt, val, oval, err; 898 int changed = 0; 899 900 if (cval->cmask) { 901 cnt = 0; 902 for (c = 0; c < MAX_CHANNELS; c++) { 903 if (!(cval->cmask & (1 << c))) 904 continue; 905 err = get_cur_mix_value(cval, c + 1, cnt, &oval); 906 if (err < 0) 907 return cval->mixer->ignore_ctl_error ? 0 : err; 908 val = ucontrol->value.integer.value[cnt]; 909 val = get_abs_value(cval, val); 910 if (oval != val) { 911 set_cur_mix_value(cval, c + 1, cnt, val); 912 changed = 1; 913 } 914 cnt++; 915 } 916 } else { 917 /* master channel */ 918 err = get_cur_mix_value(cval, 0, 0, &oval); 919 if (err < 0) 920 return cval->mixer->ignore_ctl_error ? 0 : err; 921 val = ucontrol->value.integer.value[0]; 922 val = get_abs_value(cval, val); 923 if (val != oval) { 924 set_cur_mix_value(cval, 0, 0, val); 925 changed = 1; 926 } 927 } 928 return changed; 929 } 930 931 static struct snd_kcontrol_new usb_feature_unit_ctl = { 932 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 933 .name = "", /* will be filled later manually */ 934 .info = mixer_ctl_feature_info, 935 .get = mixer_ctl_feature_get, 936 .put = mixer_ctl_feature_put, 937 }; 938 939 /* the read-only variant */ 940 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = { 941 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 942 .name = "", /* will be filled later manually */ 943 .info = mixer_ctl_feature_info, 944 .get = mixer_ctl_feature_get, 945 .put = NULL, 946 }; 947 948 949 /* 950 * build a feature control 951 */ 952 953 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str) 954 { 955 return strlcat(kctl->id.name, str, sizeof(kctl->id.name)); 956 } 957 958 static void build_feature_ctl(struct mixer_build *state, void *raw_desc, 959 unsigned int ctl_mask, int control, 960 struct usb_audio_term *iterm, int unitid, 961 int read_only) 962 { 963 struct uac_feature_unit_descriptor *desc = raw_desc; 964 unsigned int len = 0; 965 int mapped_name = 0; 966 int nameid = uac_feature_unit_iFeature(desc); 967 struct snd_kcontrol *kctl; 968 struct usb_mixer_elem_info *cval; 969 const struct usbmix_name_map *map; 970 971 control++; /* change from zero-based to 1-based value */ 972 973 if (control == UAC_GRAPHIC_EQUALIZER_CONTROL) { 974 /* FIXME: not supported yet */ 975 return; 976 } 977 978 map = find_map(state, unitid, control); 979 if (check_ignored_ctl(map)) 980 return; 981 982 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 983 if (! cval) { 984 snd_printk(KERN_ERR "cannot malloc kcontrol\n"); 985 return; 986 } 987 cval->mixer = state->mixer; 988 cval->id = unitid; 989 cval->control = control; 990 cval->cmask = ctl_mask; 991 cval->val_type = audio_feature_info[control-1].type; 992 if (ctl_mask == 0) 993 cval->channels = 1; /* master channel */ 994 else { 995 int i, c = 0; 996 for (i = 0; i < 16; i++) 997 if (ctl_mask & (1 << i)) 998 c++; 999 cval->channels = c; 1000 } 1001 1002 /* get min/max values */ 1003 get_min_max(cval, 0); 1004 1005 if (read_only) 1006 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); 1007 else 1008 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1009 1010 if (! kctl) { 1011 snd_printk(KERN_ERR "cannot malloc kcontrol\n"); 1012 kfree(cval); 1013 return; 1014 } 1015 kctl->private_free = usb_mixer_elem_free; 1016 1017 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1018 mapped_name = len != 0; 1019 if (! len && nameid) 1020 len = snd_usb_copy_string_desc(state, nameid, 1021 kctl->id.name, sizeof(kctl->id.name)); 1022 1023 switch (control) { 1024 case UAC_MUTE_CONTROL: 1025 case UAC_VOLUME_CONTROL: 1026 /* determine the control name. the rule is: 1027 * - if a name id is given in descriptor, use it. 1028 * - if the connected input can be determined, then use the name 1029 * of terminal type. 1030 * - if the connected output can be determined, use it. 1031 * - otherwise, anonymous name. 1032 */ 1033 if (! len) { 1034 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1); 1035 if (! len) 1036 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1); 1037 if (! len) 1038 len = snprintf(kctl->id.name, sizeof(kctl->id.name), 1039 "Feature %d", unitid); 1040 } 1041 /* determine the stream direction: 1042 * if the connected output is USB stream, then it's likely a 1043 * capture stream. otherwise it should be playback (hopefully :) 1044 */ 1045 if (! mapped_name && ! (state->oterm.type >> 16)) { 1046 if ((state->oterm.type & 0xff00) == 0x0100) { 1047 len = append_ctl_name(kctl, " Capture"); 1048 } else { 1049 len = append_ctl_name(kctl, " Playback"); 1050 } 1051 } 1052 append_ctl_name(kctl, control == UAC_MUTE_CONTROL ? 1053 " Switch" : " Volume"); 1054 if (control == UAC_VOLUME_CONTROL) { 1055 kctl->tlv.c = mixer_vol_tlv; 1056 kctl->vd[0].access |= 1057 SNDRV_CTL_ELEM_ACCESS_TLV_READ | 1058 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; 1059 check_mapped_dB(map, cval); 1060 } 1061 break; 1062 1063 default: 1064 if (! len) 1065 strlcpy(kctl->id.name, audio_feature_info[control-1].name, 1066 sizeof(kctl->id.name)); 1067 break; 1068 } 1069 1070 /* volume control quirks */ 1071 switch (state->chip->usb_id) { 1072 case USB_ID(0x0471, 0x0101): 1073 case USB_ID(0x0471, 0x0104): 1074 case USB_ID(0x0471, 0x0105): 1075 case USB_ID(0x0672, 0x1041): 1076 /* quirk for UDA1321/N101. 1077 * note that detection between firmware 2.1.1.7 (N101) 1078 * and later 2.1.1.21 is not very clear from datasheets. 1079 * I hope that the min value is -15360 for newer firmware --jk 1080 */ 1081 if (!strcmp(kctl->id.name, "PCM Playback Volume") && 1082 cval->min == -15616) { 1083 snd_printk(KERN_INFO 1084 "set volume quirk for UDA1321/N101 chip\n"); 1085 cval->max = -256; 1086 } 1087 break; 1088 1089 case USB_ID(0x046d, 0x09a4): 1090 if (!strcmp(kctl->id.name, "Mic Capture Volume")) { 1091 snd_printk(KERN_INFO 1092 "set volume quirk for QuickCam E3500\n"); 1093 cval->min = 6080; 1094 cval->max = 8768; 1095 cval->res = 192; 1096 } 1097 break; 1098 1099 } 1100 1101 snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n", 1102 cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res); 1103 add_control_to_empty(state, kctl); 1104 } 1105 1106 1107 1108 /* 1109 * parse a feature unit 1110 * 1111 * most of controlls are defined here. 1112 */ 1113 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr) 1114 { 1115 int channels, i, j; 1116 struct usb_audio_term iterm; 1117 unsigned int master_bits, first_ch_bits; 1118 int err, csize; 1119 struct uac_feature_unit_descriptor *hdr = _ftr; 1120 __u8 *bmaControls; 1121 1122 if (state->mixer->protocol == UAC_VERSION_1) { 1123 csize = hdr->bControlSize; 1124 channels = (hdr->bLength - 7) / csize - 1; 1125 bmaControls = hdr->bmaControls; 1126 } else { 1127 struct uac2_feature_unit_descriptor *ftr = _ftr; 1128 csize = 4; 1129 channels = (hdr->bLength - 6) / 4; 1130 bmaControls = ftr->bmaControls; 1131 } 1132 1133 if (hdr->bLength < 7 || !csize || hdr->bLength < 7 + csize) { 1134 snd_printk(KERN_ERR "usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid); 1135 return -EINVAL; 1136 } 1137 1138 /* parse the source unit */ 1139 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0) 1140 return err; 1141 1142 /* determine the input source type and name */ 1143 if (check_input_term(state, hdr->bSourceID, &iterm) < 0) 1144 return -EINVAL; 1145 1146 master_bits = snd_usb_combine_bytes(bmaControls, csize); 1147 /* master configuration quirks */ 1148 switch (state->chip->usb_id) { 1149 case USB_ID(0x08bb, 0x2702): 1150 snd_printk(KERN_INFO 1151 "usbmixer: master volume quirk for PCM2702 chip\n"); 1152 /* disable non-functional volume control */ 1153 master_bits &= ~UAC_FU_VOLUME; 1154 break; 1155 } 1156 if (channels > 0) 1157 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize); 1158 else 1159 first_ch_bits = 0; 1160 1161 if (state->mixer->protocol == UAC_VERSION_1) { 1162 /* check all control types */ 1163 for (i = 0; i < 10; i++) { 1164 unsigned int ch_bits = 0; 1165 for (j = 0; j < channels; j++) { 1166 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize); 1167 if (mask & (1 << i)) 1168 ch_bits |= (1 << j); 1169 } 1170 /* audio class v1 controls are never read-only */ 1171 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */ 1172 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0); 1173 if (master_bits & (1 << i)) 1174 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0); 1175 } 1176 } else { /* UAC_VERSION_2 */ 1177 for (i = 0; i < 30/2; i++) { 1178 /* From the USB Audio spec v2.0: 1179 bmaControls() is a (ch+1)-element array of 4-byte bitmaps, 1180 each containing a set of bit pairs. If a Control is present, 1181 it must be Host readable. If a certain Control is not 1182 present then the bit pair must be set to 0b00. 1183 If a Control is present but read-only, the bit pair must be 1184 set to 0b01. If a Control is also Host programmable, the bit 1185 pair must be set to 0b11. The value 0b10 is not allowed. */ 1186 unsigned int ch_bits = 0; 1187 unsigned int ch_read_only = 0; 1188 1189 for (j = 0; j < channels; j++) { 1190 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize); 1191 if (mask & (1 << (i * 2))) { 1192 ch_bits |= (1 << j); 1193 if (~mask & (1 << ((i * 2) + 1))) 1194 ch_read_only |= (1 << j); 1195 } 1196 } 1197 1198 /* FIXME: the whole unit is read-only if any of the channels is marked read-only */ 1199 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */ 1200 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, !!ch_read_only); 1201 if (master_bits & (1 << i * 2)) 1202 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 1203 ~master_bits & (1 << ((i * 2) + 1))); 1204 } 1205 } 1206 1207 return 0; 1208 } 1209 1210 1211 /* 1212 * Mixer Unit 1213 */ 1214 1215 /* 1216 * build a mixer unit control 1217 * 1218 * the callbacks are identical with feature unit. 1219 * input channel number (zero based) is given in control field instead. 1220 */ 1221 1222 static void build_mixer_unit_ctl(struct mixer_build *state, 1223 struct uac_mixer_unit_descriptor *desc, 1224 int in_pin, int in_ch, int unitid, 1225 struct usb_audio_term *iterm) 1226 { 1227 struct usb_mixer_elem_info *cval; 1228 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc); 1229 unsigned int i, len; 1230 struct snd_kcontrol *kctl; 1231 const struct usbmix_name_map *map; 1232 1233 map = find_map(state, unitid, 0); 1234 if (check_ignored_ctl(map)) 1235 return; 1236 1237 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1238 if (! cval) 1239 return; 1240 1241 cval->mixer = state->mixer; 1242 cval->id = unitid; 1243 cval->control = in_ch + 1; /* based on 1 */ 1244 cval->val_type = USB_MIXER_S16; 1245 for (i = 0; i < num_outs; i++) { 1246 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) { 1247 cval->cmask |= (1 << i); 1248 cval->channels++; 1249 } 1250 } 1251 1252 /* get min/max values */ 1253 get_min_max(cval, 0); 1254 1255 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); 1256 if (! kctl) { 1257 snd_printk(KERN_ERR "cannot malloc kcontrol\n"); 1258 kfree(cval); 1259 return; 1260 } 1261 kctl->private_free = usb_mixer_elem_free; 1262 1263 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1264 if (! len) 1265 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0); 1266 if (! len) 1267 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1); 1268 append_ctl_name(kctl, " Volume"); 1269 1270 snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n", 1271 cval->id, kctl->id.name, cval->channels, cval->min, cval->max); 1272 add_control_to_empty(state, kctl); 1273 } 1274 1275 1276 /* 1277 * parse a mixer unit 1278 */ 1279 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc) 1280 { 1281 struct uac_mixer_unit_descriptor *desc = raw_desc; 1282 struct usb_audio_term iterm; 1283 int input_pins, num_ins, num_outs; 1284 int pin, ich, err; 1285 1286 if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) { 1287 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid); 1288 return -EINVAL; 1289 } 1290 /* no bmControls field (e.g. Maya44) -> ignore */ 1291 if (desc->bLength <= 10 + input_pins) { 1292 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid); 1293 return 0; 1294 } 1295 1296 num_ins = 0; 1297 ich = 0; 1298 for (pin = 0; pin < input_pins; pin++) { 1299 err = parse_audio_unit(state, desc->baSourceID[pin]); 1300 if (err < 0) 1301 return err; 1302 err = check_input_term(state, desc->baSourceID[pin], &iterm); 1303 if (err < 0) 1304 return err; 1305 num_ins += iterm.channels; 1306 for (; ich < num_ins; ++ich) { 1307 int och, ich_has_controls = 0; 1308 1309 for (och = 0; och < num_outs; ++och) { 1310 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), 1311 ich, och, num_outs)) { 1312 ich_has_controls = 1; 1313 break; 1314 } 1315 } 1316 if (ich_has_controls) 1317 build_mixer_unit_ctl(state, desc, pin, ich, 1318 unitid, &iterm); 1319 } 1320 } 1321 return 0; 1322 } 1323 1324 1325 /* 1326 * Processing Unit / Extension Unit 1327 */ 1328 1329 /* get callback for processing/extension unit */ 1330 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 1331 { 1332 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1333 int err, val; 1334 1335 err = get_cur_ctl_value(cval, cval->control << 8, &val); 1336 if (err < 0 && cval->mixer->ignore_ctl_error) { 1337 ucontrol->value.integer.value[0] = cval->min; 1338 return 0; 1339 } 1340 if (err < 0) 1341 return err; 1342 val = get_relative_value(cval, val); 1343 ucontrol->value.integer.value[0] = val; 1344 return 0; 1345 } 1346 1347 /* put callback for processing/extension unit */ 1348 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 1349 { 1350 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1351 int val, oval, err; 1352 1353 err = get_cur_ctl_value(cval, cval->control << 8, &oval); 1354 if (err < 0) { 1355 if (cval->mixer->ignore_ctl_error) 1356 return 0; 1357 return err; 1358 } 1359 val = ucontrol->value.integer.value[0]; 1360 val = get_abs_value(cval, val); 1361 if (val != oval) { 1362 set_cur_ctl_value(cval, cval->control << 8, val); 1363 return 1; 1364 } 1365 return 0; 1366 } 1367 1368 /* alsa control interface for processing/extension unit */ 1369 static struct snd_kcontrol_new mixer_procunit_ctl = { 1370 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1371 .name = "", /* will be filled later */ 1372 .info = mixer_ctl_feature_info, 1373 .get = mixer_ctl_procunit_get, 1374 .put = mixer_ctl_procunit_put, 1375 }; 1376 1377 1378 /* 1379 * predefined data for processing units 1380 */ 1381 struct procunit_value_info { 1382 int control; 1383 char *suffix; 1384 int val_type; 1385 int min_value; 1386 }; 1387 1388 struct procunit_info { 1389 int type; 1390 char *name; 1391 struct procunit_value_info *values; 1392 }; 1393 1394 static struct procunit_value_info updown_proc_info[] = { 1395 { USB_PROC_UPDOWN_SWITCH, "Switch", USB_MIXER_BOOLEAN }, 1396 { USB_PROC_UPDOWN_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 }, 1397 { 0 } 1398 }; 1399 static struct procunit_value_info prologic_proc_info[] = { 1400 { USB_PROC_PROLOGIC_SWITCH, "Switch", USB_MIXER_BOOLEAN }, 1401 { USB_PROC_PROLOGIC_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 }, 1402 { 0 } 1403 }; 1404 static struct procunit_value_info threed_enh_proc_info[] = { 1405 { USB_PROC_3DENH_SWITCH, "Switch", USB_MIXER_BOOLEAN }, 1406 { USB_PROC_3DENH_SPACE, "Spaciousness", USB_MIXER_U8 }, 1407 { 0 } 1408 }; 1409 static struct procunit_value_info reverb_proc_info[] = { 1410 { USB_PROC_REVERB_SWITCH, "Switch", USB_MIXER_BOOLEAN }, 1411 { USB_PROC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, 1412 { USB_PROC_REVERB_TIME, "Time", USB_MIXER_U16 }, 1413 { USB_PROC_REVERB_DELAY, "Delay", USB_MIXER_U8 }, 1414 { 0 } 1415 }; 1416 static struct procunit_value_info chorus_proc_info[] = { 1417 { USB_PROC_CHORUS_SWITCH, "Switch", USB_MIXER_BOOLEAN }, 1418 { USB_PROC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, 1419 { USB_PROC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, 1420 { USB_PROC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, 1421 { 0 } 1422 }; 1423 static struct procunit_value_info dcr_proc_info[] = { 1424 { USB_PROC_DCR_SWITCH, "Switch", USB_MIXER_BOOLEAN }, 1425 { USB_PROC_DCR_RATIO, "Ratio", USB_MIXER_U16 }, 1426 { USB_PROC_DCR_MAX_AMP, "Max Amp", USB_MIXER_S16 }, 1427 { USB_PROC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, 1428 { USB_PROC_DCR_ATTACK, "Attack Time", USB_MIXER_U16 }, 1429 { USB_PROC_DCR_RELEASE, "Release Time", USB_MIXER_U16 }, 1430 { 0 } 1431 }; 1432 1433 static struct procunit_info procunits[] = { 1434 { USB_PROC_UPDOWN, "Up Down", updown_proc_info }, 1435 { USB_PROC_PROLOGIC, "Dolby Prologic", prologic_proc_info }, 1436 { USB_PROC_3DENH, "3D Stereo Extender", threed_enh_proc_info }, 1437 { USB_PROC_REVERB, "Reverb", reverb_proc_info }, 1438 { USB_PROC_CHORUS, "Chorus", chorus_proc_info }, 1439 { USB_PROC_DCR, "DCR", dcr_proc_info }, 1440 { 0 }, 1441 }; 1442 /* 1443 * predefined data for extension units 1444 */ 1445 static struct procunit_value_info clock_rate_xu_info[] = { 1446 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, 1447 { 0 } 1448 }; 1449 static struct procunit_value_info clock_source_xu_info[] = { 1450 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, 1451 { 0 } 1452 }; 1453 static struct procunit_value_info spdif_format_xu_info[] = { 1454 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, 1455 { 0 } 1456 }; 1457 static struct procunit_value_info soft_limit_xu_info[] = { 1458 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, 1459 { 0 } 1460 }; 1461 static struct procunit_info extunits[] = { 1462 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info }, 1463 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info }, 1464 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info }, 1465 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info }, 1466 { 0 } 1467 }; 1468 /* 1469 * build a processing/extension unit 1470 */ 1471 static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name) 1472 { 1473 struct uac_processing_unit_descriptor *desc = raw_desc; 1474 int num_ins = desc->bNrInPins; 1475 struct usb_mixer_elem_info *cval; 1476 struct snd_kcontrol *kctl; 1477 int i, err, nameid, type, len; 1478 struct procunit_info *info; 1479 struct procunit_value_info *valinfo; 1480 const struct usbmix_name_map *map; 1481 static struct procunit_value_info default_value_info[] = { 1482 { 0x01, "Switch", USB_MIXER_BOOLEAN }, 1483 { 0 } 1484 }; 1485 static struct procunit_info default_info = { 1486 0, NULL, default_value_info 1487 }; 1488 1489 if (desc->bLength < 13 || desc->bLength < 13 + num_ins || 1490 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { 1491 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid); 1492 return -EINVAL; 1493 } 1494 1495 for (i = 0; i < num_ins; i++) { 1496 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 1497 return err; 1498 } 1499 1500 type = le16_to_cpu(desc->wProcessType); 1501 for (info = list; info && info->type; info++) 1502 if (info->type == type) 1503 break; 1504 if (! info || ! info->type) 1505 info = &default_info; 1506 1507 for (valinfo = info->values; valinfo->control; valinfo++) { 1508 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol); 1509 1510 if (! (controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1)))) 1511 continue; 1512 map = find_map(state, unitid, valinfo->control); 1513 if (check_ignored_ctl(map)) 1514 continue; 1515 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1516 if (! cval) { 1517 snd_printk(KERN_ERR "cannot malloc kcontrol\n"); 1518 return -ENOMEM; 1519 } 1520 cval->mixer = state->mixer; 1521 cval->id = unitid; 1522 cval->control = valinfo->control; 1523 cval->val_type = valinfo->val_type; 1524 cval->channels = 1; 1525 1526 /* get min/max values */ 1527 if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) { 1528 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol); 1529 /* FIXME: hard-coded */ 1530 cval->min = 1; 1531 cval->max = control_spec[0]; 1532 cval->res = 1; 1533 cval->initialized = 1; 1534 } else { 1535 if (type == USB_XU_CLOCK_RATE) { 1536 /* E-Mu USB 0404/0202/TrackerPre 1537 * samplerate control quirk 1538 */ 1539 cval->min = 0; 1540 cval->max = 5; 1541 cval->res = 1; 1542 cval->initialized = 1; 1543 } else 1544 get_min_max(cval, valinfo->min_value); 1545 } 1546 1547 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); 1548 if (! kctl) { 1549 snd_printk(KERN_ERR "cannot malloc kcontrol\n"); 1550 kfree(cval); 1551 return -ENOMEM; 1552 } 1553 kctl->private_free = usb_mixer_elem_free; 1554 1555 if (check_mapped_name(map, kctl->id.name, 1556 sizeof(kctl->id.name))) 1557 /* nothing */ ; 1558 else if (info->name) 1559 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name)); 1560 else { 1561 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); 1562 len = 0; 1563 if (nameid) 1564 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name)); 1565 if (! len) 1566 strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); 1567 } 1568 append_ctl_name(kctl, " "); 1569 append_ctl_name(kctl, valinfo->suffix); 1570 1571 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n", 1572 cval->id, kctl->id.name, cval->channels, cval->min, cval->max); 1573 if ((err = add_control_to_empty(state, kctl)) < 0) 1574 return err; 1575 } 1576 return 0; 1577 } 1578 1579 1580 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc) 1581 { 1582 return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit"); 1583 } 1584 1585 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc) 1586 { 1587 /* Note that we parse extension units with processing unit descriptors. 1588 * That's ok as the layout is the same */ 1589 return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit"); 1590 } 1591 1592 1593 /* 1594 * Selector Unit 1595 */ 1596 1597 /* info callback for selector unit 1598 * use an enumerator type for routing 1599 */ 1600 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 1601 { 1602 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1603 char **itemlist = (char **)kcontrol->private_value; 1604 1605 if (snd_BUG_ON(!itemlist)) 1606 return -EINVAL; 1607 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; 1608 uinfo->count = 1; 1609 uinfo->value.enumerated.items = cval->max; 1610 if ((int)uinfo->value.enumerated.item >= cval->max) 1611 uinfo->value.enumerated.item = cval->max - 1; 1612 strcpy(uinfo->value.enumerated.name, itemlist[uinfo->value.enumerated.item]); 1613 return 0; 1614 } 1615 1616 /* get callback for selector unit */ 1617 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 1618 { 1619 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1620 int val, err; 1621 1622 err = get_cur_ctl_value(cval, 0, &val); 1623 if (err < 0) { 1624 if (cval->mixer->ignore_ctl_error) { 1625 ucontrol->value.enumerated.item[0] = 0; 1626 return 0; 1627 } 1628 return err; 1629 } 1630 val = get_relative_value(cval, val); 1631 ucontrol->value.enumerated.item[0] = val; 1632 return 0; 1633 } 1634 1635 /* put callback for selector unit */ 1636 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 1637 { 1638 struct usb_mixer_elem_info *cval = kcontrol->private_data; 1639 int val, oval, err; 1640 1641 err = get_cur_ctl_value(cval, 0, &oval); 1642 if (err < 0) { 1643 if (cval->mixer->ignore_ctl_error) 1644 return 0; 1645 return err; 1646 } 1647 val = ucontrol->value.enumerated.item[0]; 1648 val = get_abs_value(cval, val); 1649 if (val != oval) { 1650 set_cur_ctl_value(cval, 0, val); 1651 return 1; 1652 } 1653 return 0; 1654 } 1655 1656 /* alsa control interface for selector unit */ 1657 static struct snd_kcontrol_new mixer_selectunit_ctl = { 1658 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1659 .name = "", /* will be filled later */ 1660 .info = mixer_ctl_selector_info, 1661 .get = mixer_ctl_selector_get, 1662 .put = mixer_ctl_selector_put, 1663 }; 1664 1665 1666 /* private free callback. 1667 * free both private_data and private_value 1668 */ 1669 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) 1670 { 1671 int i, num_ins = 0; 1672 1673 if (kctl->private_data) { 1674 struct usb_mixer_elem_info *cval = kctl->private_data; 1675 num_ins = cval->max; 1676 kfree(cval); 1677 kctl->private_data = NULL; 1678 } 1679 if (kctl->private_value) { 1680 char **itemlist = (char **)kctl->private_value; 1681 for (i = 0; i < num_ins; i++) 1682 kfree(itemlist[i]); 1683 kfree(itemlist); 1684 kctl->private_value = 0; 1685 } 1686 } 1687 1688 /* 1689 * parse a selector unit 1690 */ 1691 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc) 1692 { 1693 struct uac_selector_unit_descriptor *desc = raw_desc; 1694 unsigned int i, nameid, len; 1695 int err; 1696 struct usb_mixer_elem_info *cval; 1697 struct snd_kcontrol *kctl; 1698 const struct usbmix_name_map *map; 1699 char **namelist; 1700 1701 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) { 1702 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid); 1703 return -EINVAL; 1704 } 1705 1706 for (i = 0; i < desc->bNrInPins; i++) { 1707 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) 1708 return err; 1709 } 1710 1711 if (desc->bNrInPins == 1) /* only one ? nonsense! */ 1712 return 0; 1713 1714 map = find_map(state, unitid, 0); 1715 if (check_ignored_ctl(map)) 1716 return 0; 1717 1718 cval = kzalloc(sizeof(*cval), GFP_KERNEL); 1719 if (! cval) { 1720 snd_printk(KERN_ERR "cannot malloc kcontrol\n"); 1721 return -ENOMEM; 1722 } 1723 cval->mixer = state->mixer; 1724 cval->id = unitid; 1725 cval->val_type = USB_MIXER_U8; 1726 cval->channels = 1; 1727 cval->min = 1; 1728 cval->max = desc->bNrInPins; 1729 cval->res = 1; 1730 cval->initialized = 1; 1731 1732 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL); 1733 if (! namelist) { 1734 snd_printk(KERN_ERR "cannot malloc\n"); 1735 kfree(cval); 1736 return -ENOMEM; 1737 } 1738 #define MAX_ITEM_NAME_LEN 64 1739 for (i = 0; i < desc->bNrInPins; i++) { 1740 struct usb_audio_term iterm; 1741 len = 0; 1742 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); 1743 if (! namelist[i]) { 1744 snd_printk(KERN_ERR "cannot malloc\n"); 1745 while (i--) 1746 kfree(namelist[i]); 1747 kfree(namelist); 1748 kfree(cval); 1749 return -ENOMEM; 1750 } 1751 len = check_mapped_selector_name(state, unitid, i, namelist[i], 1752 MAX_ITEM_NAME_LEN); 1753 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0) 1754 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0); 1755 if (! len) 1756 sprintf(namelist[i], "Input %d", i); 1757 } 1758 1759 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); 1760 if (! kctl) { 1761 snd_printk(KERN_ERR "cannot malloc kcontrol\n"); 1762 kfree(namelist); 1763 kfree(cval); 1764 return -ENOMEM; 1765 } 1766 kctl->private_value = (unsigned long)namelist; 1767 kctl->private_free = usb_mixer_selector_elem_free; 1768 1769 nameid = uac_selector_unit_iSelector(desc); 1770 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); 1771 if (len) 1772 ; 1773 else if (nameid) 1774 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name)); 1775 else { 1776 len = get_term_name(state, &state->oterm, 1777 kctl->id.name, sizeof(kctl->id.name), 0); 1778 if (! len) 1779 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name)); 1780 1781 if ((state->oterm.type & 0xff00) == 0x0100) 1782 append_ctl_name(kctl, " Capture Source"); 1783 else 1784 append_ctl_name(kctl, " Playback Source"); 1785 } 1786 1787 snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n", 1788 cval->id, kctl->id.name, desc->bNrInPins); 1789 if ((err = add_control_to_empty(state, kctl)) < 0) 1790 return err; 1791 1792 return 0; 1793 } 1794 1795 1796 /* 1797 * parse an audio unit recursively 1798 */ 1799 1800 static int parse_audio_unit(struct mixer_build *state, int unitid) 1801 { 1802 unsigned char *p1; 1803 1804 if (test_and_set_bit(unitid, state->unitbitmap)) 1805 return 0; /* the unit already visited */ 1806 1807 p1 = find_audio_control_unit(state, unitid); 1808 if (!p1) { 1809 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid); 1810 return -EINVAL; 1811 } 1812 1813 switch (p1[2]) { 1814 case UAC_INPUT_TERMINAL: 1815 return 0; /* NOP */ 1816 case UAC_MIXER_UNIT: 1817 return parse_audio_mixer_unit(state, unitid, p1); 1818 case UAC_SELECTOR_UNIT: 1819 return parse_audio_selector_unit(state, unitid, p1); 1820 case UAC_FEATURE_UNIT: 1821 return parse_audio_feature_unit(state, unitid, p1); 1822 case UAC_PROCESSING_UNIT_V1: 1823 /* UAC2_EFFECT_UNIT has the same value */ 1824 if (state->mixer->protocol == UAC_VERSION_1) 1825 return parse_audio_processing_unit(state, unitid, p1); 1826 else 1827 return 0; /* FIXME - effect units not implemented yet */ 1828 case UAC_EXTENSION_UNIT_V1: 1829 /* UAC2_PROCESSING_UNIT_V2 has the same value */ 1830 if (state->mixer->protocol == UAC_VERSION_1) 1831 return parse_audio_extension_unit(state, unitid, p1); 1832 else /* UAC_VERSION_2 */ 1833 return parse_audio_processing_unit(state, unitid, p1); 1834 default: 1835 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]); 1836 return -EINVAL; 1837 } 1838 } 1839 1840 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer) 1841 { 1842 kfree(mixer->id_elems); 1843 if (mixer->urb) { 1844 kfree(mixer->urb->transfer_buffer); 1845 usb_free_urb(mixer->urb); 1846 } 1847 usb_free_urb(mixer->rc_urb); 1848 kfree(mixer->rc_setup_packet); 1849 kfree(mixer); 1850 } 1851 1852 static int snd_usb_mixer_dev_free(struct snd_device *device) 1853 { 1854 struct usb_mixer_interface *mixer = device->device_data; 1855 snd_usb_mixer_free(mixer); 1856 return 0; 1857 } 1858 1859 /* 1860 * create mixer controls 1861 * 1862 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers 1863 */ 1864 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) 1865 { 1866 struct mixer_build state; 1867 int err; 1868 const struct usbmix_ctl_map *map; 1869 struct usb_host_interface *hostif; 1870 void *p; 1871 1872 hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0]; 1873 memset(&state, 0, sizeof(state)); 1874 state.chip = mixer->chip; 1875 state.mixer = mixer; 1876 state.buffer = hostif->extra; 1877 state.buflen = hostif->extralen; 1878 1879 /* check the mapping table */ 1880 for (map = usbmix_ctl_maps; map->id; map++) { 1881 if (map->id == state.chip->usb_id) { 1882 state.map = map->map; 1883 state.selector_map = map->selector_map; 1884 mixer->ignore_ctl_error = map->ignore_ctl_error; 1885 break; 1886 } 1887 } 1888 1889 p = NULL; 1890 while ((p = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, p, UAC_OUTPUT_TERMINAL)) != NULL) { 1891 if (mixer->protocol == UAC_VERSION_1) { 1892 struct uac_output_terminal_descriptor_v1 *desc = p; 1893 1894 if (desc->bLength < sizeof(*desc)) 1895 continue; /* invalid descriptor? */ 1896 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */ 1897 state.oterm.id = desc->bTerminalID; 1898 state.oterm.type = le16_to_cpu(desc->wTerminalType); 1899 state.oterm.name = desc->iTerminal; 1900 err = parse_audio_unit(&state, desc->bSourceID); 1901 if (err < 0) 1902 return err; 1903 } else { /* UAC_VERSION_2 */ 1904 struct uac2_output_terminal_descriptor *desc = p; 1905 1906 if (desc->bLength < sizeof(*desc)) 1907 continue; /* invalid descriptor? */ 1908 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */ 1909 state.oterm.id = desc->bTerminalID; 1910 state.oterm.type = le16_to_cpu(desc->wTerminalType); 1911 state.oterm.name = desc->iTerminal; 1912 err = parse_audio_unit(&state, desc->bSourceID); 1913 if (err < 0) 1914 return err; 1915 } 1916 } 1917 1918 return 0; 1919 } 1920 1921 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) 1922 { 1923 struct usb_mixer_elem_info *info; 1924 1925 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) 1926 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, 1927 info->elem_id); 1928 } 1929 1930 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer, 1931 int unitid, 1932 struct usb_mixer_elem_info *cval) 1933 { 1934 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN", 1935 "S8", "U8", "S16", "U16"}; 1936 snd_iprintf(buffer, " Unit: %i\n", unitid); 1937 if (cval->elem_id) 1938 snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n", 1939 cval->elem_id->name, cval->elem_id->index); 1940 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, " 1941 "channels=%i, type=\"%s\"\n", cval->id, 1942 cval->control, cval->cmask, cval->channels, 1943 val_types[cval->val_type]); 1944 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n", 1945 cval->min, cval->max, cval->dBmin, cval->dBmax); 1946 } 1947 1948 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, 1949 struct snd_info_buffer *buffer) 1950 { 1951 struct snd_usb_audio *chip = entry->private_data; 1952 struct usb_mixer_interface *mixer; 1953 struct usb_mixer_elem_info *cval; 1954 int unitid; 1955 1956 list_for_each_entry(mixer, &chip->mixer_list, list) { 1957 snd_iprintf(buffer, 1958 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n", 1959 chip->usb_id, mixer->ctrlif, 1960 mixer->ignore_ctl_error); 1961 snd_iprintf(buffer, "Card: %s\n", chip->card->longname); 1962 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { 1963 for (cval = mixer->id_elems[unitid]; cval; 1964 cval = cval->next_id_elem) 1965 snd_usb_mixer_dump_cval(buffer, unitid, cval); 1966 } 1967 } 1968 } 1969 1970 static void snd_usb_mixer_status_complete(struct urb *urb) 1971 { 1972 struct usb_mixer_interface *mixer = urb->context; 1973 1974 if (urb->status == 0) { 1975 u8 *buf = urb->transfer_buffer; 1976 int i; 1977 1978 for (i = urb->actual_length; i >= 2; buf += 2, i -= 2) { 1979 snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n", 1980 buf[0], buf[1]); 1981 /* ignore any notifications not from the control interface */ 1982 if ((buf[0] & 0x0f) != 0) 1983 continue; 1984 if (!(buf[0] & 0x40)) 1985 snd_usb_mixer_notify_id(mixer, buf[1]); 1986 else 1987 snd_usb_mixer_rc_memory_change(mixer, buf[1]); 1988 } 1989 } 1990 if (urb->status != -ENOENT && urb->status != -ECONNRESET) { 1991 urb->dev = mixer->chip->dev; 1992 usb_submit_urb(urb, GFP_ATOMIC); 1993 } 1994 } 1995 1996 /* create the handler for the optional status interrupt endpoint */ 1997 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer) 1998 { 1999 struct usb_host_interface *hostif; 2000 struct usb_endpoint_descriptor *ep; 2001 void *transfer_buffer; 2002 int buffer_length; 2003 unsigned int epnum; 2004 2005 hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0]; 2006 /* we need one interrupt input endpoint */ 2007 if (get_iface_desc(hostif)->bNumEndpoints < 1) 2008 return 0; 2009 ep = get_endpoint(hostif, 0); 2010 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep)) 2011 return 0; 2012 2013 epnum = usb_endpoint_num(ep); 2014 buffer_length = le16_to_cpu(ep->wMaxPacketSize); 2015 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL); 2016 if (!transfer_buffer) 2017 return -ENOMEM; 2018 mixer->urb = usb_alloc_urb(0, GFP_KERNEL); 2019 if (!mixer->urb) { 2020 kfree(transfer_buffer); 2021 return -ENOMEM; 2022 } 2023 usb_fill_int_urb(mixer->urb, mixer->chip->dev, 2024 usb_rcvintpipe(mixer->chip->dev, epnum), 2025 transfer_buffer, buffer_length, 2026 snd_usb_mixer_status_complete, mixer, ep->bInterval); 2027 usb_submit_urb(mixer->urb, GFP_KERNEL); 2028 return 0; 2029 } 2030 2031 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, 2032 int ignore_error) 2033 { 2034 static struct snd_device_ops dev_ops = { 2035 .dev_free = snd_usb_mixer_dev_free 2036 }; 2037 struct usb_mixer_interface *mixer; 2038 struct snd_info_entry *entry; 2039 struct usb_host_interface *host_iface; 2040 int err; 2041 2042 strcpy(chip->card->mixername, "USB Mixer"); 2043 2044 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL); 2045 if (!mixer) 2046 return -ENOMEM; 2047 mixer->chip = chip; 2048 mixer->ctrlif = ctrlif; 2049 mixer->ignore_ctl_error = ignore_error; 2050 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems), 2051 GFP_KERNEL); 2052 if (!mixer->id_elems) { 2053 kfree(mixer); 2054 return -ENOMEM; 2055 } 2056 2057 host_iface = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0]; 2058 mixer->protocol = host_iface->desc.bInterfaceProtocol; 2059 2060 if ((err = snd_usb_mixer_controls(mixer)) < 0 || 2061 (err = snd_usb_mixer_status_create(mixer)) < 0) 2062 goto _error; 2063 2064 snd_usb_mixer_apply_create_quirk(mixer); 2065 2066 err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops); 2067 if (err < 0) 2068 goto _error; 2069 2070 if (list_empty(&chip->mixer_list) && 2071 !snd_card_proc_new(chip->card, "usbmixer", &entry)) 2072 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read); 2073 2074 list_add(&mixer->list, &chip->mixer_list); 2075 return 0; 2076 2077 _error: 2078 snd_usb_mixer_free(mixer); 2079 return err; 2080 } 2081 2082 void snd_usb_mixer_disconnect(struct list_head *p) 2083 { 2084 struct usb_mixer_interface *mixer; 2085 2086 mixer = list_entry(p, struct usb_mixer_interface, list); 2087 usb_kill_urb(mixer->urb); 2088 usb_kill_urb(mixer->rc_urb); 2089 } 2090