1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Scarlett Driver for ALSA 4 * 5 * Copyright (c) 2013 by Tobias Hoffmann 6 * Copyright (c) 2013 by Robin Gareus <robin at gareus.org> 7 * Copyright (c) 2002 by Takashi Iwai <tiwai at suse.de> 8 * Copyright (c) 2014 by Chris J Arges <chris.j.arges at canonical.com> 9 * 10 * Many codes borrowed from audio.c by 11 * Alan Cox (alan at lxorguk.ukuu.org.uk) 12 * Thomas Sailer (sailer at ife.ee.ethz.ch) 13 * 14 * Code cleanup: 15 * David Henningsson <david.henningsson at canonical.com> 16 */ 17 18 /* 19 * Rewritten and extended to support more models, e.g. Scarlett 18i8. 20 * 21 * Auto-detection via UAC2 is not feasible to properly discover the vast 22 * majority of features. It's related to both Linux/ALSA's UAC2 as well as 23 * Focusrite's implementation of it. Eventually quirks may be sufficient but 24 * right now it's a major headache to work arount these things. 25 * 26 * NB. Neither the OSX nor the win driver provided by Focusrite performs 27 * discovery, they seem to operate the same as this driver. 28 */ 29 30 /* Mixer Interface for the Focusrite Scarlett 18i6 audio interface. 31 * 32 * The protocol was reverse engineered by looking at communication between 33 * Scarlett MixControl (v 1.2.128.0) and the Focusrite(R) Scarlett 18i6 34 * (firmware v305) using wireshark and usbmon in January 2013. 35 * Extended in July 2013. 36 * 37 * this mixer gives complete access to all features of the device: 38 * - change Impedance of inputs (Line-in, Mic / Instrument, Hi-Z) 39 * - select clock source 40 * - dynamic input to mixer-matrix assignment 41 * - 18 x 6 mixer-matrix gain stages 42 * - bus routing & volume control 43 * - automatic re-initialization on connect if device was power-cycled 44 * 45 * USB URB commands overview (bRequest = 0x01 = UAC2_CS_CUR) 46 * wIndex 47 * 0x01 Analog Input line/instrument impedance switch, wValue=0x0901 + 48 * channel, data=Line/Inst (2bytes) 49 * pad (-10dB) switch, wValue=0x0b01 + channel, data=Off/On (2bytes) 50 * ?? wValue=0x0803/04, ?? (2bytes) 51 * 0x0a Master Volume, wValue=0x0200+bus[0:all + only 1..4?] data(2bytes) 52 * Bus Mute/Unmute wValue=0x0100+bus[0:all + only 1..4?], data(2bytes) 53 * 0x28 Clock source, wValue=0x0100, data={1:int,2:spdif,3:adat} (1byte) 54 * 0x29 Set Sample-rate, wValue=0x0100, data=sample-rate(4bytes) 55 * 0x32 Mixer mux, wValue=0x0600 + mixer-channel, data=input-to-connect(2bytes) 56 * 0x33 Output mux, wValue=bus, data=input-to-connect(2bytes) 57 * 0x34 Capture mux, wValue=0...18, data=input-to-connect(2bytes) 58 * 0x3c Matrix Mixer gains, wValue=mixer-node data=gain(2bytes) 59 * ?? [sometimes](4bytes, e.g 0x000003be 0x000003bf ...03ff) 60 * 61 * USB reads: (i.e. actually issued by original software) 62 * 0x01 wValue=0x0901+channel (1byte!!), wValue=0x0b01+channed (1byte!!) 63 * 0x29 wValue=0x0100 sample-rate(4bytes) 64 * wValue=0x0200 ?? 1byte (only once) 65 * 0x2a wValue=0x0100 ?? 4bytes, sample-rate2 ?? 66 * 67 * USB reads with bRequest = 0x03 = UAC2_CS_MEM 68 * 0x3c wValue=0x0002 1byte: sync status (locked=1) 69 * wValue=0x0000 18*2byte: peak meter (inputs) 70 * wValue=0x0001 8(?)*2byte: peak meter (mix) 71 * wValue=0x0003 6*2byte: peak meter (pcm/daw) 72 * 73 * USB write with bRequest = 0x03 74 * 0x3c Save settings to hardware: wValue=0x005a, data=0xa5 75 * 76 * 77 * <ditaa> 78 * /--------------\ 18chn 6chn /--------------\ 79 * | Hardware in +--+-------\ /------+--+ ALSA PCM out | 80 * \--------------/ | | | | \--------------/ 81 * | | | | 82 * | v v | 83 * | +---------------+ | 84 * | \ Matrix Mux / | 85 * | +-----+-----+ | 86 * | | | 87 * | | 18chn | 88 * | v | 89 * | +-----------+ | 90 * | | Mixer | | 91 * | | Matrix | | 92 * | | | | 93 * | | 18x6 Gain | | 94 * | | stages | | 95 * | +-----+-----+ | 96 * | | | 97 * | | | 98 * | 18chn | 6chn | 6chn 99 * v v v 100 * ========================= 101 * +---------------+ +--—------------+ 102 * \ Output Mux / \ Capture Mux / 103 * +-----+-----+ +-----+-----+ 104 * | | 105 * | 6chn | 106 * v | 107 * +-------------+ | 108 * | Master Gain | | 109 * +------+------+ | 110 * | | 111 * | 6chn | 18chn 112 * | (3 stereo pairs) | 113 * /--------------\ | | /--------------\ 114 * | Hardware out |<--/ \-->| ALSA PCM in | 115 * \--------------/ \--------------/ 116 * </ditaa> 117 * 118 */ 119 120 #include <linux/slab.h> 121 #include <linux/usb.h> 122 #include <linux/usb/audio-v2.h> 123 124 #include <sound/core.h> 125 #include <sound/control.h> 126 #include <sound/tlv.h> 127 128 #include "usbaudio.h" 129 #include "mixer.h" 130 #include "helper.h" 131 #include "power.h" 132 133 #include "mixer_scarlett.h" 134 135 /* some gui mixers can't handle negative ctl values */ 136 #define SND_SCARLETT_LEVEL_BIAS 128 137 #define SND_SCARLETT_MATRIX_IN_MAX 18 138 #define SND_SCARLETT_CONTROLS_MAX 10 139 #define SND_SCARLETT_OFFSETS_MAX 5 140 141 enum { 142 SCARLETT_OUTPUTS, 143 SCARLETT_SWITCH_IMPEDANCE, 144 SCARLETT_SWITCH_PAD, 145 SCARLETT_SWITCH_GAIN, 146 }; 147 148 enum { 149 SCARLETT_OFFSET_PCM = 0, 150 SCARLETT_OFFSET_ANALOG = 1, 151 SCARLETT_OFFSET_SPDIF = 2, 152 SCARLETT_OFFSET_ADAT = 3, 153 SCARLETT_OFFSET_MIX = 4, 154 }; 155 156 struct scarlett_mixer_elem_enum_info { 157 int start; 158 int len; 159 int offsets[SND_SCARLETT_OFFSETS_MAX]; 160 char const * const *names; 161 }; 162 163 struct scarlett_mixer_control { 164 unsigned char num; 165 unsigned char type; 166 const char *name; 167 }; 168 169 struct scarlett_device_info { 170 int matrix_in; 171 int matrix_out; 172 int input_len; 173 int output_len; 174 175 struct scarlett_mixer_elem_enum_info opt_master; 176 struct scarlett_mixer_elem_enum_info opt_matrix; 177 178 /* initial values for matrix mux */ 179 int matrix_mux_init[SND_SCARLETT_MATRIX_IN_MAX]; 180 181 int num_controls; /* number of items in controls */ 182 const struct scarlett_mixer_control controls[SND_SCARLETT_CONTROLS_MAX]; 183 }; 184 185 /********************** Enum Strings *************************/ 186 187 static const struct scarlett_mixer_elem_enum_info opt_pad = { 188 .start = 0, 189 .len = 2, 190 .offsets = {}, 191 .names = (char const * const []){ 192 "0dB", "-10dB" 193 } 194 }; 195 196 static const struct scarlett_mixer_elem_enum_info opt_gain = { 197 .start = 0, 198 .len = 2, 199 .offsets = {}, 200 .names = (char const * const []){ 201 "Lo", "Hi" 202 } 203 }; 204 205 static const struct scarlett_mixer_elem_enum_info opt_impedance = { 206 .start = 0, 207 .len = 2, 208 .offsets = {}, 209 .names = (char const * const []){ 210 "Line", "Hi-Z" 211 } 212 }; 213 214 static const struct scarlett_mixer_elem_enum_info opt_clock = { 215 .start = 1, 216 .len = 3, 217 .offsets = {}, 218 .names = (char const * const []){ 219 "Internal", "SPDIF", "ADAT" 220 } 221 }; 222 223 static const struct scarlett_mixer_elem_enum_info opt_sync = { 224 .start = 0, 225 .len = 2, 226 .offsets = {}, 227 .names = (char const * const []){ 228 "No Lock", "Locked" 229 } 230 }; 231 232 static int scarlett_ctl_switch_info(struct snd_kcontrol *kctl, 233 struct snd_ctl_elem_info *uinfo) 234 { 235 struct usb_mixer_elem_info *elem = kctl->private_data; 236 237 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 238 uinfo->count = elem->channels; 239 uinfo->value.integer.min = 0; 240 uinfo->value.integer.max = 1; 241 return 0; 242 } 243 244 static int scarlett_ctl_switch_get(struct snd_kcontrol *kctl, 245 struct snd_ctl_elem_value *ucontrol) 246 { 247 struct usb_mixer_elem_info *elem = kctl->private_data; 248 int i, err, val; 249 250 for (i = 0; i < elem->channels; i++) { 251 err = snd_usb_get_cur_mix_value(elem, i, i, &val); 252 if (err < 0) 253 return err; 254 255 val = !val; /* invert mute logic for mixer */ 256 ucontrol->value.integer.value[i] = val; 257 } 258 259 return 0; 260 } 261 262 static int scarlett_ctl_switch_put(struct snd_kcontrol *kctl, 263 struct snd_ctl_elem_value *ucontrol) 264 { 265 struct usb_mixer_elem_info *elem = kctl->private_data; 266 int i, changed = 0; 267 int err, oval, val; 268 269 for (i = 0; i < elem->channels; i++) { 270 err = snd_usb_get_cur_mix_value(elem, i, i, &oval); 271 if (err < 0) 272 return err; 273 274 val = ucontrol->value.integer.value[i]; 275 val = !val; 276 if (oval != val) { 277 err = snd_usb_set_cur_mix_value(elem, i, i, val); 278 if (err < 0) 279 return err; 280 281 changed = 1; 282 } 283 } 284 285 return changed; 286 } 287 288 static int scarlett_ctl_resume(struct usb_mixer_elem_list *list) 289 { 290 struct usb_mixer_elem_info *elem = mixer_elem_list_to_info(list); 291 int i; 292 293 for (i = 0; i < elem->channels; i++) 294 if (elem->cached & (1 << i)) 295 snd_usb_set_cur_mix_value(elem, i, i, 296 elem->cache_val[i]); 297 return 0; 298 } 299 300 static int scarlett_ctl_info(struct snd_kcontrol *kctl, 301 struct snd_ctl_elem_info *uinfo) 302 { 303 struct usb_mixer_elem_info *elem = kctl->private_data; 304 305 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 306 uinfo->count = elem->channels; 307 uinfo->value.integer.min = 0; 308 uinfo->value.integer.max = (int)kctl->private_value + 309 SND_SCARLETT_LEVEL_BIAS; 310 uinfo->value.integer.step = 1; 311 return 0; 312 } 313 314 static int scarlett_ctl_get(struct snd_kcontrol *kctl, 315 struct snd_ctl_elem_value *ucontrol) 316 { 317 struct usb_mixer_elem_info *elem = kctl->private_data; 318 int i, err, val; 319 320 for (i = 0; i < elem->channels; i++) { 321 err = snd_usb_get_cur_mix_value(elem, i, i, &val); 322 if (err < 0) 323 return err; 324 325 val = clamp(val / 256, -128, (int)kctl->private_value) + 326 SND_SCARLETT_LEVEL_BIAS; 327 ucontrol->value.integer.value[i] = val; 328 } 329 330 return 0; 331 } 332 333 static int scarlett_ctl_put(struct snd_kcontrol *kctl, 334 struct snd_ctl_elem_value *ucontrol) 335 { 336 struct usb_mixer_elem_info *elem = kctl->private_data; 337 int i, changed = 0; 338 int err, oval, val; 339 340 for (i = 0; i < elem->channels; i++) { 341 err = snd_usb_get_cur_mix_value(elem, i, i, &oval); 342 if (err < 0) 343 return err; 344 345 val = ucontrol->value.integer.value[i] - 346 SND_SCARLETT_LEVEL_BIAS; 347 val = val * 256; 348 if (oval != val) { 349 err = snd_usb_set_cur_mix_value(elem, i, i, val); 350 if (err < 0) 351 return err; 352 353 changed = 1; 354 } 355 } 356 357 return changed; 358 } 359 360 static void scarlett_generate_name(int i, char *dst, int offsets[]) 361 { 362 if (i > offsets[SCARLETT_OFFSET_MIX]) 363 sprintf(dst, "Mix %c", 364 'A'+(i - offsets[SCARLETT_OFFSET_MIX] - 1)); 365 else if (i > offsets[SCARLETT_OFFSET_ADAT]) 366 sprintf(dst, "ADAT %d", i - offsets[SCARLETT_OFFSET_ADAT]); 367 else if (i > offsets[SCARLETT_OFFSET_SPDIF]) 368 sprintf(dst, "SPDIF %d", i - offsets[SCARLETT_OFFSET_SPDIF]); 369 else if (i > offsets[SCARLETT_OFFSET_ANALOG]) 370 sprintf(dst, "Analog %d", i - offsets[SCARLETT_OFFSET_ANALOG]); 371 else if (i > offsets[SCARLETT_OFFSET_PCM]) 372 sprintf(dst, "PCM %d", i - offsets[SCARLETT_OFFSET_PCM]); 373 else 374 sprintf(dst, "Off"); 375 } 376 377 static int scarlett_ctl_enum_dynamic_info(struct snd_kcontrol *kctl, 378 struct snd_ctl_elem_info *uinfo) 379 { 380 struct usb_mixer_elem_info *elem = kctl->private_data; 381 struct scarlett_mixer_elem_enum_info *opt = elem->private_data; 382 unsigned int items = opt->len; 383 384 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; 385 uinfo->count = elem->channels; 386 uinfo->value.enumerated.items = items; 387 388 if (uinfo->value.enumerated.item >= items) 389 uinfo->value.enumerated.item = items - 1; 390 391 /* generate name dynamically based on item number and offset info */ 392 scarlett_generate_name(uinfo->value.enumerated.item, 393 uinfo->value.enumerated.name, 394 opt->offsets); 395 396 return 0; 397 } 398 399 static int scarlett_ctl_enum_info(struct snd_kcontrol *kctl, 400 struct snd_ctl_elem_info *uinfo) 401 { 402 struct usb_mixer_elem_info *elem = kctl->private_data; 403 struct scarlett_mixer_elem_enum_info *opt = elem->private_data; 404 405 return snd_ctl_enum_info(uinfo, elem->channels, opt->len, 406 (const char * const *)opt->names); 407 } 408 409 static int scarlett_ctl_enum_get(struct snd_kcontrol *kctl, 410 struct snd_ctl_elem_value *ucontrol) 411 { 412 struct usb_mixer_elem_info *elem = kctl->private_data; 413 struct scarlett_mixer_elem_enum_info *opt = elem->private_data; 414 int err, val; 415 416 err = snd_usb_get_cur_mix_value(elem, 0, 0, &val); 417 if (err < 0) 418 return err; 419 420 val = clamp(val - opt->start, 0, opt->len-1); 421 422 ucontrol->value.enumerated.item[0] = val; 423 424 return 0; 425 } 426 427 static int scarlett_ctl_enum_put(struct snd_kcontrol *kctl, 428 struct snd_ctl_elem_value *ucontrol) 429 { 430 struct usb_mixer_elem_info *elem = kctl->private_data; 431 struct scarlett_mixer_elem_enum_info *opt = elem->private_data; 432 int err, oval, val; 433 434 err = snd_usb_get_cur_mix_value(elem, 0, 0, &oval); 435 if (err < 0) 436 return err; 437 438 val = ucontrol->value.integer.value[0]; 439 val = val + opt->start; 440 if (val != oval) { 441 snd_usb_set_cur_mix_value(elem, 0, 0, val); 442 return 1; 443 } 444 return 0; 445 } 446 447 static int scarlett_ctl_enum_resume(struct usb_mixer_elem_list *list) 448 { 449 struct usb_mixer_elem_info *elem = mixer_elem_list_to_info(list); 450 451 if (elem->cached) 452 snd_usb_set_cur_mix_value(elem, 0, 0, *elem->cache_val); 453 return 0; 454 } 455 456 static int scarlett_ctl_meter_get(struct snd_kcontrol *kctl, 457 struct snd_ctl_elem_value *ucontrol) 458 { 459 struct usb_mixer_elem_info *elem = kctl->private_data; 460 struct snd_usb_audio *chip = elem->head.mixer->chip; 461 unsigned char buf[2 * MAX_CHANNELS] = {0, }; 462 int wValue = (elem->control << 8) | elem->idx_off; 463 int idx = snd_usb_ctrl_intf(chip) | (elem->head.id << 8); 464 int err; 465 466 err = snd_usb_ctl_msg(chip->dev, 467 usb_rcvctrlpipe(chip->dev, 0), 468 UAC2_CS_MEM, 469 USB_RECIP_INTERFACE | USB_TYPE_CLASS | 470 USB_DIR_IN, wValue, idx, buf, elem->channels); 471 if (err < 0) 472 return err; 473 474 ucontrol->value.enumerated.item[0] = clamp((int)buf[0], 0, 1); 475 return 0; 476 } 477 478 static const struct snd_kcontrol_new usb_scarlett_ctl_switch = { 479 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 480 .name = "", 481 .info = scarlett_ctl_switch_info, 482 .get = scarlett_ctl_switch_get, 483 .put = scarlett_ctl_switch_put, 484 }; 485 486 static const DECLARE_TLV_DB_SCALE(db_scale_scarlett_gain, -12800, 100, 0); 487 488 static const struct snd_kcontrol_new usb_scarlett_ctl = { 489 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 490 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | 491 SNDRV_CTL_ELEM_ACCESS_TLV_READ, 492 .name = "", 493 .info = scarlett_ctl_info, 494 .get = scarlett_ctl_get, 495 .put = scarlett_ctl_put, 496 .private_value = 6, /* max value */ 497 .tlv = { .p = db_scale_scarlett_gain } 498 }; 499 500 static const struct snd_kcontrol_new usb_scarlett_ctl_master = { 501 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 502 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | 503 SNDRV_CTL_ELEM_ACCESS_TLV_READ, 504 .name = "", 505 .info = scarlett_ctl_info, 506 .get = scarlett_ctl_get, 507 .put = scarlett_ctl_put, 508 .private_value = 6, /* max value */ 509 .tlv = { .p = db_scale_scarlett_gain } 510 }; 511 512 static const struct snd_kcontrol_new usb_scarlett_ctl_enum = { 513 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 514 .name = "", 515 .info = scarlett_ctl_enum_info, 516 .get = scarlett_ctl_enum_get, 517 .put = scarlett_ctl_enum_put, 518 }; 519 520 static const struct snd_kcontrol_new usb_scarlett_ctl_dynamic_enum = { 521 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 522 .name = "", 523 .info = scarlett_ctl_enum_dynamic_info, 524 .get = scarlett_ctl_enum_get, 525 .put = scarlett_ctl_enum_put, 526 }; 527 528 static const struct snd_kcontrol_new usb_scarlett_ctl_sync = { 529 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 530 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, 531 .name = "", 532 .info = scarlett_ctl_enum_info, 533 .get = scarlett_ctl_meter_get, 534 }; 535 536 static int add_new_ctl(struct usb_mixer_interface *mixer, 537 const struct snd_kcontrol_new *ncontrol, 538 usb_mixer_elem_resume_func_t resume, 539 int index, int offset, int num, 540 int val_type, int channels, const char *name, 541 const struct scarlett_mixer_elem_enum_info *opt, 542 struct usb_mixer_elem_info **elem_ret 543 ) 544 { 545 struct snd_kcontrol *kctl; 546 struct usb_mixer_elem_info *elem; 547 int err; 548 549 elem = kzalloc(sizeof(*elem), GFP_KERNEL); 550 if (!elem) 551 return -ENOMEM; 552 553 elem->head.mixer = mixer; 554 elem->head.resume = resume; 555 elem->control = offset; 556 elem->idx_off = num; 557 elem->head.id = index; 558 elem->val_type = val_type; 559 560 elem->channels = channels; 561 562 /* add scarlett_mixer_elem_enum_info struct */ 563 elem->private_data = (void *)opt; 564 565 kctl = snd_ctl_new1(ncontrol, elem); 566 if (!kctl) { 567 kfree(elem); 568 return -ENOMEM; 569 } 570 kctl->private_free = snd_usb_mixer_elem_free; 571 572 strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); 573 574 err = snd_usb_mixer_add_control(&elem->head, kctl); 575 if (err < 0) 576 return err; 577 578 if (elem_ret) 579 *elem_ret = elem; 580 581 return 0; 582 } 583 584 static int add_output_ctls(struct usb_mixer_interface *mixer, 585 int index, const char *name, 586 const struct scarlett_device_info *info) 587 { 588 int err; 589 char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; 590 struct usb_mixer_elem_info *elem; 591 592 /* Add mute switch */ 593 snprintf(mx, sizeof(mx), "Master %d (%s) Playback Switch", 594 index + 1, name); 595 err = add_new_ctl(mixer, &usb_scarlett_ctl_switch, 596 scarlett_ctl_resume, 0x0a, 0x01, 597 2*index+1, USB_MIXER_S16, 2, mx, NULL, &elem); 598 if (err < 0) 599 return err; 600 601 /* Add volume control and initialize to 0 */ 602 snprintf(mx, sizeof(mx), "Master %d (%s) Playback Volume", 603 index + 1, name); 604 err = add_new_ctl(mixer, &usb_scarlett_ctl_master, 605 scarlett_ctl_resume, 0x0a, 0x02, 606 2*index+1, USB_MIXER_S16, 2, mx, NULL, &elem); 607 if (err < 0) 608 return err; 609 610 /* Add L channel source playback enumeration */ 611 snprintf(mx, sizeof(mx), "Master %dL (%s) Source Playback Enum", 612 index + 1, name); 613 err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum, 614 scarlett_ctl_enum_resume, 0x33, 0x00, 615 2*index, USB_MIXER_S16, 1, mx, &info->opt_master, 616 &elem); 617 if (err < 0) 618 return err; 619 620 /* Add R channel source playback enumeration */ 621 snprintf(mx, sizeof(mx), "Master %dR (%s) Source Playback Enum", 622 index + 1, name); 623 err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum, 624 scarlett_ctl_enum_resume, 0x33, 0x00, 625 2*index+1, USB_MIXER_S16, 1, mx, &info->opt_master, 626 &elem); 627 if (err < 0) 628 return err; 629 630 return 0; 631 } 632 633 /********************** device-specific config *************************/ 634 635 /* untested... */ 636 static const struct scarlett_device_info s6i6_info = { 637 .matrix_in = 18, 638 .matrix_out = 8, 639 .input_len = 6, 640 .output_len = 6, 641 642 .opt_master = { 643 .start = -1, 644 .len = 27, 645 .offsets = {0, 12, 16, 18, 18}, 646 .names = NULL 647 }, 648 649 .opt_matrix = { 650 .start = -1, 651 .len = 19, 652 .offsets = {0, 12, 16, 18, 18}, 653 .names = NULL 654 }, 655 656 .num_controls = 9, 657 .controls = { 658 { .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" }, 659 { .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone" }, 660 { .num = 2, .type = SCARLETT_OUTPUTS, .name = "SPDIF" }, 661 { .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 662 { .num = 1, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 663 { .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 664 { .num = 2, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 665 { .num = 3, .type = SCARLETT_SWITCH_GAIN, .name = NULL}, 666 { .num = 4, .type = SCARLETT_SWITCH_GAIN, .name = NULL}, 667 }, 668 669 .matrix_mux_init = { 670 12, 13, 14, 15, /* Analog -> 1..4 */ 671 16, 17, /* SPDIF -> 5,6 */ 672 0, 1, 2, 3, 4, 5, 6, 7, /* PCM[1..12] -> 7..18 */ 673 8, 9, 10, 11 674 } 675 }; 676 677 /* untested... */ 678 static const struct scarlett_device_info s8i6_info = { 679 .matrix_in = 18, 680 .matrix_out = 6, 681 .input_len = 8, 682 .output_len = 6, 683 684 .opt_master = { 685 .start = -1, 686 .len = 25, 687 .offsets = {0, 12, 16, 18, 18}, 688 .names = NULL 689 }, 690 691 .opt_matrix = { 692 .start = -1, 693 .len = 19, 694 .offsets = {0, 12, 16, 18, 18}, 695 .names = NULL 696 }, 697 698 .num_controls = 7, 699 .controls = { 700 { .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" }, 701 { .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone" }, 702 { .num = 2, .type = SCARLETT_OUTPUTS, .name = "SPDIF" }, 703 { .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 704 { .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 705 { .num = 3, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 706 { .num = 4, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 707 }, 708 709 .matrix_mux_init = { 710 12, 13, 14, 15, /* Analog -> 1..4 */ 711 16, 17, /* SPDIF -> 5,6 */ 712 0, 1, 2, 3, 4, 5, 6, 7, /* PCM[1..12] -> 7..18 */ 713 8, 9, 10, 11 714 } 715 }; 716 717 static const struct scarlett_device_info s18i6_info = { 718 .matrix_in = 18, 719 .matrix_out = 6, 720 .input_len = 18, 721 .output_len = 6, 722 723 .opt_master = { 724 .start = -1, 725 .len = 31, 726 .offsets = {0, 6, 14, 16, 24}, 727 .names = NULL, 728 }, 729 730 .opt_matrix = { 731 .start = -1, 732 .len = 25, 733 .offsets = {0, 6, 14, 16, 24}, 734 .names = NULL, 735 }, 736 737 .num_controls = 5, 738 .controls = { 739 { .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" }, 740 { .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone" }, 741 { .num = 2, .type = SCARLETT_OUTPUTS, .name = "SPDIF" }, 742 { .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 743 { .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 744 }, 745 746 .matrix_mux_init = { 747 6, 7, 8, 9, 10, 11, 12, 13, /* Analog -> 1..8 */ 748 16, 17, 18, 19, 20, 21, /* ADAT[1..6] -> 9..14 */ 749 14, 15, /* SPDIF -> 15,16 */ 750 0, 1 /* PCM[1,2] -> 17,18 */ 751 } 752 }; 753 754 static const struct scarlett_device_info s18i8_info = { 755 .matrix_in = 18, 756 .matrix_out = 8, 757 .input_len = 18, 758 .output_len = 8, 759 760 .opt_master = { 761 .start = -1, 762 .len = 35, 763 .offsets = {0, 8, 16, 18, 26}, 764 .names = NULL 765 }, 766 767 .opt_matrix = { 768 .start = -1, 769 .len = 27, 770 .offsets = {0, 8, 16, 18, 26}, 771 .names = NULL 772 }, 773 774 .num_controls = 10, 775 .controls = { 776 { .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" }, 777 { .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone 1" }, 778 { .num = 2, .type = SCARLETT_OUTPUTS, .name = "Headphone 2" }, 779 { .num = 3, .type = SCARLETT_OUTPUTS, .name = "SPDIF" }, 780 { .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 781 { .num = 1, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 782 { .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 783 { .num = 2, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 784 { .num = 3, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 785 { .num = 4, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 786 }, 787 788 .matrix_mux_init = { 789 8, 9, 10, 11, 12, 13, 14, 15, /* Analog -> 1..8 */ 790 18, 19, 20, 21, 22, 23, /* ADAT[1..6] -> 9..14 */ 791 16, 17, /* SPDIF -> 15,16 */ 792 0, 1 /* PCM[1,2] -> 17,18 */ 793 } 794 }; 795 796 static const struct scarlett_device_info s18i20_info = { 797 .matrix_in = 18, 798 .matrix_out = 8, 799 .input_len = 18, 800 .output_len = 20, 801 802 .opt_master = { 803 .start = -1, 804 .len = 47, 805 .offsets = {0, 20, 28, 30, 38}, 806 .names = NULL 807 }, 808 809 .opt_matrix = { 810 .start = -1, 811 .len = 39, 812 .offsets = {0, 20, 28, 30, 38}, 813 .names = NULL 814 }, 815 816 .num_controls = 10, 817 .controls = { 818 { .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" }, 819 { .num = 1, .type = SCARLETT_OUTPUTS, .name = "Line 3/4" }, 820 { .num = 2, .type = SCARLETT_OUTPUTS, .name = "Line 5/6" }, 821 { .num = 3, .type = SCARLETT_OUTPUTS, .name = "Line 7/8" }, 822 { .num = 4, .type = SCARLETT_OUTPUTS, .name = "Line 9/10" }, 823 { .num = 5, .type = SCARLETT_OUTPUTS, .name = "SPDIF" }, 824 { .num = 6, .type = SCARLETT_OUTPUTS, .name = "ADAT 1/2" }, 825 { .num = 7, .type = SCARLETT_OUTPUTS, .name = "ADAT 3/4" }, 826 { .num = 8, .type = SCARLETT_OUTPUTS, .name = "ADAT 5/6" }, 827 { .num = 9, .type = SCARLETT_OUTPUTS, .name = "ADAT 7/8" }, 828 /*{ .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 829 { .num = 1, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 830 { .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL}, 831 { .num = 2, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 832 { .num = 3, .type = SCARLETT_SWITCH_PAD, .name = NULL}, 833 { .num = 4, .type = SCARLETT_SWITCH_PAD, .name = NULL},*/ 834 }, 835 836 .matrix_mux_init = { 837 20, 21, 22, 23, 24, 25, 26, 27, /* Analog -> 1..8 */ 838 30, 31, 32, 33, 34, 35, /* ADAT[1..6] -> 9..14 */ 839 28, 29, /* SPDIF -> 15,16 */ 840 0, 1 /* PCM[1,2] -> 17,18 */ 841 } 842 }; 843 844 845 static int scarlett_controls_create_generic(struct usb_mixer_interface *mixer, 846 const struct scarlett_device_info *info) 847 { 848 int i, err; 849 char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; 850 const struct scarlett_mixer_control *ctl; 851 struct usb_mixer_elem_info *elem; 852 853 /* create master switch and playback volume */ 854 err = add_new_ctl(mixer, &usb_scarlett_ctl_switch, 855 scarlett_ctl_resume, 0x0a, 0x01, 0, 856 USB_MIXER_S16, 1, "Master Playback Switch", NULL, 857 &elem); 858 if (err < 0) 859 return err; 860 861 err = add_new_ctl(mixer, &usb_scarlett_ctl_master, 862 scarlett_ctl_resume, 0x0a, 0x02, 0, 863 USB_MIXER_S16, 1, "Master Playback Volume", NULL, 864 &elem); 865 if (err < 0) 866 return err; 867 868 /* iterate through controls in info struct and create each one */ 869 for (i = 0; i < info->num_controls; i++) { 870 ctl = &info->controls[i]; 871 872 switch (ctl->type) { 873 case SCARLETT_OUTPUTS: 874 err = add_output_ctls(mixer, ctl->num, ctl->name, info); 875 if (err < 0) 876 return err; 877 break; 878 case SCARLETT_SWITCH_IMPEDANCE: 879 sprintf(mx, "Input %d Impedance Switch", ctl->num); 880 err = add_new_ctl(mixer, &usb_scarlett_ctl_enum, 881 scarlett_ctl_enum_resume, 0x01, 882 0x09, ctl->num, USB_MIXER_S16, 1, mx, 883 &opt_impedance, &elem); 884 if (err < 0) 885 return err; 886 break; 887 case SCARLETT_SWITCH_PAD: 888 sprintf(mx, "Input %d Pad Switch", ctl->num); 889 err = add_new_ctl(mixer, &usb_scarlett_ctl_enum, 890 scarlett_ctl_enum_resume, 0x01, 891 0x0b, ctl->num, USB_MIXER_S16, 1, mx, 892 &opt_pad, &elem); 893 if (err < 0) 894 return err; 895 break; 896 case SCARLETT_SWITCH_GAIN: 897 sprintf(mx, "Input %d Gain Switch", ctl->num); 898 err = add_new_ctl(mixer, &usb_scarlett_ctl_enum, 899 scarlett_ctl_enum_resume, 0x01, 900 0x08, ctl->num, USB_MIXER_S16, 1, mx, 901 &opt_gain, &elem); 902 if (err < 0) 903 return err; 904 break; 905 } 906 } 907 908 return 0; 909 } 910 911 /* 912 * Create and initialize a mixer for the Focusrite(R) Scarlett 913 */ 914 int snd_scarlett_controls_create(struct usb_mixer_interface *mixer) 915 { 916 int err, i, o; 917 char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; 918 const struct scarlett_device_info *info; 919 struct usb_mixer_elem_info *elem; 920 static char sample_rate_buffer[4] = { '\x80', '\xbb', '\x00', '\x00' }; 921 922 /* only use UAC_VERSION_2 */ 923 if (!mixer->protocol) 924 return 0; 925 926 switch (mixer->chip->usb_id) { 927 case USB_ID(0x1235, 0x8012): 928 info = &s6i6_info; 929 break; 930 case USB_ID(0x1235, 0x8002): 931 info = &s8i6_info; 932 break; 933 case USB_ID(0x1235, 0x8004): 934 info = &s18i6_info; 935 break; 936 case USB_ID(0x1235, 0x8014): 937 info = &s18i8_info; 938 break; 939 case USB_ID(0x1235, 0x800c): 940 info = &s18i20_info; 941 break; 942 default: /* device not (yet) supported */ 943 return -EINVAL; 944 } 945 946 /* generic function to create controls */ 947 err = scarlett_controls_create_generic(mixer, info); 948 if (err < 0) 949 return err; 950 951 /* setup matrix controls */ 952 for (i = 0; i < info->matrix_in; i++) { 953 snprintf(mx, sizeof(mx), "Matrix %02d Input Playback Route", 954 i+1); 955 err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum, 956 scarlett_ctl_enum_resume, 0x32, 957 0x06, i, USB_MIXER_S16, 1, mx, 958 &info->opt_matrix, &elem); 959 if (err < 0) 960 return err; 961 962 for (o = 0; o < info->matrix_out; o++) { 963 sprintf(mx, "Matrix %02d Mix %c Playback Volume", i+1, 964 o+'A'); 965 err = add_new_ctl(mixer, &usb_scarlett_ctl, 966 scarlett_ctl_resume, 0x3c, 0x00, 967 (i << 3) + (o & 0x07), USB_MIXER_S16, 968 1, mx, NULL, &elem); 969 if (err < 0) 970 return err; 971 972 } 973 } 974 975 for (i = 0; i < info->input_len; i++) { 976 snprintf(mx, sizeof(mx), "Input Source %02d Capture Route", 977 i+1); 978 err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum, 979 scarlett_ctl_enum_resume, 0x34, 980 0x00, i, USB_MIXER_S16, 1, mx, 981 &info->opt_master, &elem); 982 if (err < 0) 983 return err; 984 } 985 986 /* val_len == 1 needed here */ 987 err = add_new_ctl(mixer, &usb_scarlett_ctl_enum, 988 scarlett_ctl_enum_resume, 0x28, 0x01, 0, 989 USB_MIXER_U8, 1, "Sample Clock Source", 990 &opt_clock, &elem); 991 if (err < 0) 992 return err; 993 994 /* val_len == 1 and UAC2_CS_MEM */ 995 err = add_new_ctl(mixer, &usb_scarlett_ctl_sync, NULL, 0x3c, 0x00, 2, 996 USB_MIXER_U8, 1, "Sample Clock Sync Status", 997 &opt_sync, &elem); 998 if (err < 0) 999 return err; 1000 1001 /* initialize sampling rate to 48000 */ 1002 err = snd_usb_ctl_msg(mixer->chip->dev, 1003 usb_sndctrlpipe(mixer->chip->dev, 0), UAC2_CS_CUR, 1004 USB_RECIP_INTERFACE | USB_TYPE_CLASS | 1005 USB_DIR_OUT, 0x0100, snd_usb_ctrl_intf(mixer->chip) | 1006 (0x29 << 8), sample_rate_buffer, 4); 1007 if (err < 0) 1008 return err; 1009 1010 return err; 1011 } 1012