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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Focusrite Scarlett 6i6/18i8/18i20 Gen 2 Driver for ALSA
4 *
5 * Copyright (c) 2018-2019 by Geoffrey D. Bennett <g at b4.vu>
6 *
7 * Based on the Scarlett (Gen 1) Driver for ALSA:
8 *
9 * Copyright (c) 2013 by Tobias Hoffmann
10 * Copyright (c) 2013 by Robin Gareus <robin at gareus.org>
11 * Copyright (c) 2002 by Takashi Iwai <tiwai at suse.de>
12 * Copyright (c) 2014 by Chris J Arges <chris.j.arges at canonical.com>
13 *
14 * Many codes borrowed from audio.c by
15 * Alan Cox (alan at lxorguk.ukuu.org.uk)
16 * Thomas Sailer (sailer at ife.ee.ethz.ch)
17 *
18 * Code cleanup:
19 * David Henningsson <david.henningsson at canonical.com>
20 */
21
22/* Mixer Interface for the Focusrite Scarlett 6i6/18i8/18i20 Gen 2 audio
23 * interface. Based on the Gen 1 driver and rewritten.
24 */
25
26/* The protocol was reverse engineered by looking at the communication
27 * between Focusrite Control 2.3.4 and the Focusrite(R) Scarlett 18i20
28 * (firmware 1083) using usbmon in July-August 2018.
29 *
30 * Scarlett 18i8 support added in April 2019.
31 *
32 * Scarlett 6i6 support added in June 2019 (thanks to Martin Wittmann
33 * for providing usbmon output and testing).
34 *
35 * This ALSA mixer gives access to:
36 * - input, output, mixer-matrix muxes
37 * - 18x10 mixer-matrix gain stages
38 * - gain/volume controls
39 * - level meters
40 * - line/inst level and pad controls
41 *
42 * <ditaa>
43 * /--------------\ 18chn 20chn /--------------\
44 * | Hardware in +--+------\ /-------------+--+ ALSA PCM out |
45 * \--------------/ | | | | \--------------/
46 * | | | /-----\ |
47 * | | | | | |
48 * | v v v | |
49 * | +---------------+ | |
50 * | \ Matrix Mux / | |
51 * | +-----+-----+ | |
52 * | | | |
53 * | |18chn | |
54 * | | | |
55 * | | 10chn| |
56 * | v | |
57 * | +------------+ | |
58 * | | Mixer | | |
59 * | | Matrix | | |
60 * | | | | |
61 * | | 18x10 Gain | | |
62 * | | stages | | |
63 * | +-----+------+ | |
64 * | | | |
65 * |18chn |10chn | |20chn
66 * | | | |
67 * | +----------/ |
68 * | | |
69 * v v v
70 * ===========================
71 * +---------------+ +--—------------+
72 * \ Output Mux / \ Capture Mux /
73 * +---+---+---+ +-----+-----+
74 * | | |
75 * 10chn| | |18chn
76 * | | |
77 * /--------------\ | | | /--------------\
78 * | S/PDIF, ADAT |<--/ |10chn \-->| ALSA PCM in |
79 * | Hardware out | | \--------------/
80 * \--------------/ |
81 * v
82 * +-------------+ Software gain per channel.
83 * | Master Gain |<-- 18i20 only: Switch per channel
84 * +------+------+ to select HW or SW gain control.
85 * |
86 * |10chn
87 * /--------------\ |
88 * | Analogue |<------/
89 * | Hardware out |
90 * \--------------/
91 * </ditaa>
92 *
93 */
94
95#include <linux/slab.h>
96#include <linux/usb.h>
97#include <linux/moduleparam.h>
98
99#include <sound/control.h>
100#include <sound/tlv.h>
101
102#include "usbaudio.h"
103#include "mixer.h"
104#include "helper.h"
105
106#include "mixer_scarlett_gen2.h"
107
108/* device_setup value to enable */
109#define SCARLETT2_ENABLE 0x01
110
111/* some gui mixers can't handle negative ctl values */
112#define SCARLETT2_VOLUME_BIAS 127
113
114/* mixer range from -80dB to +6dB in 0.5dB steps */
115#define SCARLETT2_MIXER_MIN_DB -80
116#define SCARLETT2_MIXER_BIAS (-SCARLETT2_MIXER_MIN_DB * 2)
117#define SCARLETT2_MIXER_MAX_DB 6
118#define SCARLETT2_MIXER_MAX_VALUE \
119 ((SCARLETT2_MIXER_MAX_DB - SCARLETT2_MIXER_MIN_DB) * 2)
120
121/* map from (dB + 80) * 2 to mixer value
122 * for dB in 0 .. 172: int(8192 * pow(10, ((dB - 160) / 2 / 20)))
123 */
124static const u16 scarlett2_mixer_values[173] = {
125 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
126 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 8, 8,
127 9, 9, 10, 10, 11, 12, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
128 23, 24, 25, 27, 29, 30, 32, 34, 36, 38, 41, 43, 46, 48, 51,
129 54, 57, 61, 65, 68, 73, 77, 81, 86, 91, 97, 103, 109, 115,
130 122, 129, 137, 145, 154, 163, 173, 183, 194, 205, 217, 230,
131 244, 259, 274, 290, 307, 326, 345, 365, 387, 410, 434, 460,
132 487, 516, 547, 579, 614, 650, 689, 730, 773, 819, 867, 919,
133 973, 1031, 1092, 1157, 1225, 1298, 1375, 1456, 1543, 1634,
134 1731, 1833, 1942, 2057, 2179, 2308, 2445, 2590, 2744, 2906,
135 3078, 3261, 3454, 3659, 3876, 4105, 4349, 4606, 4879, 5168,
136 5475, 5799, 6143, 6507, 6892, 7301, 7733, 8192, 8677, 9191,
137 9736, 10313, 10924, 11571, 12257, 12983, 13752, 14567, 15430,
138 16345
139};
140
141/* Maximum number of analogue outputs */
142#define SCARLETT2_ANALOGUE_MAX 10
143
144/* Maximum number of level and pad switches */
145#define SCARLETT2_LEVEL_SWITCH_MAX 2
146#define SCARLETT2_PAD_SWITCH_MAX 4
147
148/* Maximum number of inputs to the mixer */
149#define SCARLETT2_INPUT_MIX_MAX 18
150
151/* Maximum number of outputs from the mixer */
152#define SCARLETT2_OUTPUT_MIX_MAX 10
153
154/* Maximum size of the data in the USB mux assignment message:
155 * 18 inputs, 20 outputs, 18 matrix inputs, 8 spare
156 */
157#define SCARLETT2_MUX_MAX 64
158
159/* Number of meters:
160 * 18 inputs, 20 outputs, 18 matrix inputs
161 */
162#define SCARLETT2_NUM_METERS 56
163
164/* Hardware port types:
165 * - None (no input to mux)
166 * - Analogue I/O
167 * - S/PDIF I/O
168 * - ADAT I/O
169 * - Mixer I/O
170 * - PCM I/O
171 */
172enum {
173 SCARLETT2_PORT_TYPE_NONE = 0,
174 SCARLETT2_PORT_TYPE_ANALOGUE = 1,
175 SCARLETT2_PORT_TYPE_SPDIF = 2,
176 SCARLETT2_PORT_TYPE_ADAT = 3,
177 SCARLETT2_PORT_TYPE_MIX = 4,
178 SCARLETT2_PORT_TYPE_PCM = 5,
179 SCARLETT2_PORT_TYPE_COUNT = 6,
180};
181
182/* Count of total I/O and number available at each sample rate */
183enum {
184 SCARLETT2_PORT_IN = 0,
185 SCARLETT2_PORT_OUT = 1,
186 SCARLETT2_PORT_OUT_44 = 2,
187 SCARLETT2_PORT_OUT_88 = 3,
188 SCARLETT2_PORT_OUT_176 = 4,
189 SCARLETT2_PORT_DIRECTIONS = 5,
190};
191
192/* Hardware buttons on the 18i20 */
193#define SCARLETT2_BUTTON_MAX 2
194
195static const char *const scarlett2_button_names[SCARLETT2_BUTTON_MAX] = {
196 "Mute", "Dim"
197};
198
199/* Description of each hardware port type:
200 * - id: hardware ID for this port type
201 * - num: number of sources/destinations of this port type
202 * - src_descr: printf format string for mux input selections
203 * - src_num_offset: added to channel number for the fprintf
204 * - dst_descr: printf format string for mixer controls
205 */
206struct scarlett2_ports {
207 u16 id;
208 int num[SCARLETT2_PORT_DIRECTIONS];
209 const char * const src_descr;
210 int src_num_offset;
211 const char * const dst_descr;
212};
213
214struct scarlett2_device_info {
215 u8 line_out_hw_vol; /* line out hw volume is sw controlled */
216 u8 button_count; /* number of buttons */
217 u8 level_input_count; /* inputs with level selectable */
218 u8 pad_input_count; /* inputs with pad selectable */
219 const char * const line_out_descrs[SCARLETT2_ANALOGUE_MAX];
220 struct scarlett2_ports ports[SCARLETT2_PORT_TYPE_COUNT];
221};
222
223struct scarlett2_mixer_data {
224 struct usb_mixer_interface *mixer;
225 struct mutex usb_mutex; /* prevent sending concurrent USB requests */
226 struct mutex data_mutex; /* lock access to this data */
227 struct delayed_work work;
228 const struct scarlett2_device_info *info;
229 int num_mux_srcs;
230 u16 scarlett2_seq;
231 u8 vol_updated;
232 u8 master_vol;
233 u8 vol[SCARLETT2_ANALOGUE_MAX];
234 u8 vol_sw_hw_switch[SCARLETT2_ANALOGUE_MAX];
235 u8 level_switch[SCARLETT2_LEVEL_SWITCH_MAX];
236 u8 pad_switch[SCARLETT2_PAD_SWITCH_MAX];
237 u8 buttons[SCARLETT2_BUTTON_MAX];
238 struct snd_kcontrol *master_vol_ctl;
239 struct snd_kcontrol *vol_ctls[SCARLETT2_ANALOGUE_MAX];
240 struct snd_kcontrol *button_ctls[SCARLETT2_BUTTON_MAX];
241 u8 mux[SCARLETT2_MUX_MAX];
242 u8 mix[SCARLETT2_INPUT_MIX_MAX * SCARLETT2_OUTPUT_MIX_MAX];
243};
244
245/*** Model-specific data ***/
246
247static const struct scarlett2_device_info s6i6_gen2_info = {
248 /* The first two analogue inputs can be switched between line
249 * and instrument levels.
250 */
251 .level_input_count = 2,
252
253 /* The first two analogue inputs have an optional pad. */
254 .pad_input_count = 2,
255
256 .line_out_descrs = {
257 "Monitor L",
258 "Monitor R",
259 "Headphones L",
260 "Headphones R",
261 },
262
263 .ports = {
264 {
265 .id = 0x000,
266 .num = { 1, 0, 8, 8, 8 },
267 .src_descr = "Off",
268 .src_num_offset = 0,
269 },
270 {
271 .id = 0x080,
272 .num = { 4, 4, 4, 4, 4 },
273 .src_descr = "Analogue %d",
274 .src_num_offset = 1,
275 .dst_descr = "Analogue Output %02d Playback"
276 },
277 {
278 .id = 0x180,
279 .num = { 2, 2, 2, 2, 2 },
280 .src_descr = "S/PDIF %d",
281 .src_num_offset = 1,
282 .dst_descr = "S/PDIF Output %d Playback"
283 },
284 {
285 .id = 0x300,
286 .num = { 10, 18, 18, 18, 18 },
287 .src_descr = "Mix %c",
288 .src_num_offset = 65,
289 .dst_descr = "Mixer Input %02d Capture"
290 },
291 {
292 .id = 0x600,
293 .num = { 6, 6, 6, 6, 6 },
294 .src_descr = "PCM %d",
295 .src_num_offset = 1,
296 .dst_descr = "PCM %02d Capture"
297 },
298 },
299};
300
301static const struct scarlett2_device_info s18i8_gen2_info = {
302 /* The first two analogue inputs can be switched between line
303 * and instrument levels.
304 */
305 .level_input_count = 2,
306
307 /* The first four analogue inputs have an optional pad. */
308 .pad_input_count = 4,
309
310 .line_out_descrs = {
311 "Monitor L",
312 "Monitor R",
313 "Headphones 1 L",
314 "Headphones 1 R",
315 "Headphones 2 L",
316 "Headphones 2 R",
317 },
318
319 .ports = {
320 {
321 .id = 0x000,
322 .num = { 1, 0, 8, 8, 4 },
323 .src_descr = "Off",
324 .src_num_offset = 0,
325 },
326 {
327 .id = 0x080,
328 .num = { 8, 6, 6, 6, 6 },
329 .src_descr = "Analogue %d",
330 .src_num_offset = 1,
331 .dst_descr = "Analogue Output %02d Playback"
332 },
333 {
334 /* S/PDIF outputs aren't available at 192KHz
335 * but are included in the USB mux I/O
336 * assignment message anyway
337 */
338 .id = 0x180,
339 .num = { 2, 2, 2, 2, 2 },
340 .src_descr = "S/PDIF %d",
341 .src_num_offset = 1,
342 .dst_descr = "S/PDIF Output %d Playback"
343 },
344 {
345 .id = 0x200,
346 .num = { 8, 0, 0, 0, 0 },
347 .src_descr = "ADAT %d",
348 .src_num_offset = 1,
349 },
350 {
351 .id = 0x300,
352 .num = { 10, 18, 18, 18, 18 },
353 .src_descr = "Mix %c",
354 .src_num_offset = 65,
355 .dst_descr = "Mixer Input %02d Capture"
356 },
357 {
358 .id = 0x600,
359 .num = { 20, 18, 18, 14, 10 },
360 .src_descr = "PCM %d",
361 .src_num_offset = 1,
362 .dst_descr = "PCM %02d Capture"
363 },
364 },
365};
366
367static const struct scarlett2_device_info s18i20_gen2_info = {
368 /* The analogue line outputs on the 18i20 can be switched
369 * between software and hardware volume control
370 */
371 .line_out_hw_vol = 1,
372
373 /* Mute and dim buttons */
374 .button_count = 2,
375
376 .line_out_descrs = {
377 "Monitor L",
378 "Monitor R",
379 NULL,
380 NULL,
381 NULL,
382 NULL,
383 "Headphones 1 L",
384 "Headphones 1 R",
385 "Headphones 2 L",
386 "Headphones 2 R",
387 },
388
389 .ports = {
390 {
391 .id = 0x000,
392 .num = { 1, 0, 8, 8, 6 },
393 .src_descr = "Off",
394 .src_num_offset = 0,
395 },
396 {
397 .id = 0x080,
398 .num = { 8, 10, 10, 10, 10 },
399 .src_descr = "Analogue %d",
400 .src_num_offset = 1,
401 .dst_descr = "Analogue Output %02d Playback"
402 },
403 {
404 /* S/PDIF outputs aren't available at 192KHz
405 * but are included in the USB mux I/O
406 * assignment message anyway
407 */
408 .id = 0x180,
409 .num = { 2, 2, 2, 2, 2 },
410 .src_descr = "S/PDIF %d",
411 .src_num_offset = 1,
412 .dst_descr = "S/PDIF Output %d Playback"
413 },
414 {
415 .id = 0x200,
416 .num = { 8, 8, 8, 4, 0 },
417 .src_descr = "ADAT %d",
418 .src_num_offset = 1,
419 .dst_descr = "ADAT Output %d Playback"
420 },
421 {
422 .id = 0x300,
423 .num = { 10, 18, 18, 18, 18 },
424 .src_descr = "Mix %c",
425 .src_num_offset = 65,
426 .dst_descr = "Mixer Input %02d Capture"
427 },
428 {
429 .id = 0x600,
430 .num = { 20, 18, 18, 14, 10 },
431 .src_descr = "PCM %d",
432 .src_num_offset = 1,
433 .dst_descr = "PCM %02d Capture"
434 },
435 },
436};
437
438/* get the starting port index number for a given port type/direction */
439static int scarlett2_get_port_start_num(const struct scarlett2_ports *ports,
440 int direction, int port_type)
441{
442 int i, num = 0;
443
444 for (i = 0; i < port_type; i++)
445 num += ports[i].num[direction];
446
447 return num;
448}
449
450/*** USB Interactions ***/
451
452/* Vendor-Specific Interface, Endpoint, MaxPacketSize, Interval */
453#define SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE 5
454#define SCARLETT2_USB_INTERRUPT_ENDPOINT 4
455#define SCARLETT2_USB_INTERRUPT_MAX_DATA 64
456#define SCARLETT2_USB_INTERRUPT_INTERVAL 3
457
458/* Interrupt flags for volume and mute/dim button changes */
459#define SCARLETT2_USB_INTERRUPT_VOL_CHANGE 0x400000
460#define SCARLETT2_USB_INTERRUPT_BUTTON_CHANGE 0x200000
461
462/* Commands for sending/receiving requests/responses */
463#define SCARLETT2_USB_VENDOR_SPECIFIC_CMD_REQ 2
464#define SCARLETT2_USB_VENDOR_SPECIFIC_CMD_RESP 3
465
466#define SCARLETT2_USB_INIT_SEQ 0x00000000
467#define SCARLETT2_USB_GET_METER_LEVELS 0x00001001
468#define SCARLETT2_USB_SET_MIX 0x00002002
469#define SCARLETT2_USB_SET_MUX 0x00003002
470#define SCARLETT2_USB_GET_DATA 0x00800000
471#define SCARLETT2_USB_SET_DATA 0x00800001
472#define SCARLETT2_USB_DATA_CMD 0x00800002
473#define SCARLETT2_USB_CONFIG_SAVE 6
474
475#define SCARLETT2_USB_VOLUME_STATUS_OFFSET 0x31
476#define SCARLETT2_USB_METER_LEVELS_GET_MAGIC 1
477
478/* volume status is read together (matches scarlett2_config_items[]) */
479struct scarlett2_usb_volume_status {
480 /* mute & dim buttons */
481 u8 buttons[SCARLETT2_BUTTON_MAX];
482
483 u8 pad1;
484
485 /* software volume setting */
486 s16 sw_vol[SCARLETT2_ANALOGUE_MAX];
487
488 /* actual volume of output inc. dim (-18dB) */
489 s16 hw_vol[SCARLETT2_ANALOGUE_MAX];
490
491 u8 pad2[SCARLETT2_ANALOGUE_MAX];
492
493 /* sw (0) or hw (1) controlled */
494 u8 sw_hw_switch[SCARLETT2_ANALOGUE_MAX];
495
496 u8 pad3[6];
497
498 /* front panel volume knob */
499 s16 master_vol;
500} __packed;
501
502/* Configuration parameters that can be read and written */
503enum {
504 SCARLETT2_CONFIG_BUTTONS = 0,
505 SCARLETT2_CONFIG_LINE_OUT_VOLUME = 1,
506 SCARLETT2_CONFIG_SW_HW_SWITCH = 2,
507 SCARLETT2_CONFIG_LEVEL_SWITCH = 3,
508 SCARLETT2_CONFIG_PAD_SWITCH = 4,
509 SCARLETT2_CONFIG_COUNT = 5
510};
511
512/* Location, size, and activation command number for the configuration
513 * parameters
514 */
515struct scarlett2_config {
516 u8 offset;
517 u8 size;
518 u8 activate;
519};
520
521static const struct scarlett2_config
522 scarlett2_config_items[SCARLETT2_CONFIG_COUNT] = {
523 /* Mute/Dim Buttons */
524 {
525 .offset = 0x31,
526 .size = 1,
527 .activate = 2
528 },
529
530 /* Line Out Volume */
531 {
532 .offset = 0x34,
533 .size = 2,
534 .activate = 1
535 },
536
537 /* SW/HW Volume Switch */
538 {
539 .offset = 0x66,
540 .size = 1,
541 .activate = 3
542 },
543
544 /* Level Switch */
545 {
546 .offset = 0x7c,
547 .size = 1,
548 .activate = 7
549 },
550
551 /* Pad Switch */
552 {
553 .offset = 0x84,
554 .size = 1,
555 .activate = 8
556 }
557};
558
559/* proprietary request/response format */
560struct scarlett2_usb_packet {
561 u32 cmd;
562 u16 size;
563 u16 seq;
564 u32 error;
565 u32 pad;
566 u8 data[];
567};
568
569#define SCARLETT2_USB_PACKET_LEN (sizeof(struct scarlett2_usb_packet))
570
571static void scarlett2_fill_request_header(struct scarlett2_mixer_data *private,
572 struct scarlett2_usb_packet *req,
573 u32 cmd, u16 req_size)
574{
575 /* sequence must go up by 1 for each request */
576 u16 seq = private->scarlett2_seq++;
577
578 req->cmd = cpu_to_le32(cmd);
579 req->size = cpu_to_le16(req_size);
580 req->seq = cpu_to_le16(seq);
581 req->error = 0;
582 req->pad = 0;
583}
584
585/* Send a proprietary format request to the Scarlett interface */
586static int scarlett2_usb(
587 struct usb_mixer_interface *mixer, u32 cmd,
588 void *req_data, u16 req_size, void *resp_data, u16 resp_size)
589{
590 struct scarlett2_mixer_data *private = mixer->private_data;
591 u16 req_buf_size = sizeof(struct scarlett2_usb_packet) + req_size;
592 u16 resp_buf_size = sizeof(struct scarlett2_usb_packet) + resp_size;
593 struct scarlett2_usb_packet *req = NULL, *resp = NULL;
594 int err = 0;
595
596 req = kmalloc(req_buf_size, GFP_KERNEL);
597 if (!req) {
598 err = -ENOMEM;
599 goto error;
600 }
601
602 resp = kmalloc(resp_buf_size, GFP_KERNEL);
603 if (!resp) {
604 err = -ENOMEM;
605 goto error;
606 }
607
608 mutex_lock(&private->usb_mutex);
609
610 /* build request message and send it */
611
612 scarlett2_fill_request_header(private, req, cmd, req_size);
613
614 if (req_size)
615 memcpy(req->data, req_data, req_size);
616
617 err = snd_usb_ctl_msg(mixer->chip->dev,
618 usb_sndctrlpipe(mixer->chip->dev, 0),
619 SCARLETT2_USB_VENDOR_SPECIFIC_CMD_REQ,
620 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
621 0,
622 SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE,
623 req,
624 req_buf_size);
625
626 if (err != req_buf_size) {
627 usb_audio_err(
628 mixer->chip,
629 "Scarlett Gen 2 USB request result cmd %x was %d\n",
630 cmd, err);
631 err = -EINVAL;
632 goto unlock;
633 }
634
635 /* send a second message to get the response */
636
637 err = snd_usb_ctl_msg(mixer->chip->dev,
638 usb_sndctrlpipe(mixer->chip->dev, 0),
639 SCARLETT2_USB_VENDOR_SPECIFIC_CMD_RESP,
640 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
641 0,
642 SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE,
643 resp,
644 resp_buf_size);
645
646 /* validate the response */
647
648 if (err != resp_buf_size) {
649 usb_audio_err(
650 mixer->chip,
651 "Scarlett Gen 2 USB response result cmd %x was %d\n",
652 cmd, err);
653 err = -EINVAL;
654 goto unlock;
655 }
656
657 if (resp->cmd != req->cmd ||
658 resp->seq != req->seq ||
659 resp_size != le16_to_cpu(resp->size) ||
660 resp->error ||
661 resp->pad) {
662 usb_audio_err(
663 mixer->chip,
664 "Scarlett Gen 2 USB invalid response; "
665 "cmd tx/rx %d/%d seq %d/%d size %d/%d "
666 "error %d pad %d\n",
667 le16_to_cpu(req->cmd), le16_to_cpu(resp->cmd),
668 le16_to_cpu(req->seq), le16_to_cpu(resp->seq),
669 resp_size, le16_to_cpu(resp->size),
670 le16_to_cpu(resp->error),
671 le16_to_cpu(resp->pad));
672 err = -EINVAL;
673 goto unlock;
674 }
675
676 if (resp_size > 0)
677 memcpy(resp_data, resp->data, resp_size);
678
679unlock:
680 mutex_unlock(&private->usb_mutex);
681error:
682 kfree(req);
683 kfree(resp);
684 return err;
685}
686
687/* Send SCARLETT2_USB_DATA_CMD SCARLETT2_USB_CONFIG_SAVE */
688static void scarlett2_config_save(struct usb_mixer_interface *mixer)
689{
690 u32 req = cpu_to_le32(SCARLETT2_USB_CONFIG_SAVE);
691
692 scarlett2_usb(mixer, SCARLETT2_USB_DATA_CMD,
693 &req, sizeof(u32),
694 NULL, 0);
695}
696
697/* Delayed work to save config */
698static void scarlett2_config_save_work(struct work_struct *work)
699{
700 struct scarlett2_mixer_data *private =
701 container_of(work, struct scarlett2_mixer_data, work.work);
702
703 scarlett2_config_save(private->mixer);
704}
705
706/* Send a USB message to set a configuration parameter (volume level,
707 * sw/hw volume switch, line/inst level switch, or pad switch)
708 */
709static int scarlett2_usb_set_config(
710 struct usb_mixer_interface *mixer,
711 int config_item_num, int index, int value)
712{
713 const struct scarlett2_config config_item =
714 scarlett2_config_items[config_item_num];
715 struct {
716 u32 offset;
717 u32 bytes;
718 s32 value;
719 } __packed req;
720 u32 req2;
721 int err;
722 struct scarlett2_mixer_data *private = mixer->private_data;
723
724 /* Cancel any pending NVRAM save */
725 cancel_delayed_work_sync(&private->work);
726
727 /* Send the configuration parameter data */
728 req.offset = cpu_to_le32(config_item.offset + index * config_item.size);
729 req.bytes = cpu_to_le32(config_item.size);
730 req.value = cpu_to_le32(value);
731 err = scarlett2_usb(mixer, SCARLETT2_USB_SET_DATA,
732 &req, sizeof(u32) * 2 + config_item.size,
733 NULL, 0);
734 if (err < 0)
735 return err;
736
737 /* Activate the change */
738 req2 = cpu_to_le32(config_item.activate);
739 err = scarlett2_usb(mixer, SCARLETT2_USB_DATA_CMD,
740 &req2, sizeof(req2), NULL, 0);
741 if (err < 0)
742 return err;
743
744 /* Schedule the change to be written to NVRAM */
745 schedule_delayed_work(&private->work, msecs_to_jiffies(2000));
746
747 return 0;
748}
749
750/* Send a USB message to get data; result placed in *buf */
751static int scarlett2_usb_get(
752 struct usb_mixer_interface *mixer,
753 int offset, void *buf, int size)
754{
755 struct {
756 u32 offset;
757 u32 size;
758 } __packed req;
759
760 req.offset = cpu_to_le32(offset);
761 req.size = cpu_to_le32(size);
762 return scarlett2_usb(mixer, SCARLETT2_USB_GET_DATA,
763 &req, sizeof(req), buf, size);
764}
765
766/* Send a USB message to get configuration parameters; result placed in *buf */
767static int scarlett2_usb_get_config(
768 struct usb_mixer_interface *mixer,
769 int config_item_num, int count, void *buf)
770{
771 const struct scarlett2_config config_item =
772 scarlett2_config_items[config_item_num];
773 int size = config_item.size * count;
774
775 return scarlett2_usb_get(mixer, config_item.offset, buf, size);
776}
777
778/* Send a USB message to get volume status; result placed in *buf */
779static int scarlett2_usb_get_volume_status(
780 struct usb_mixer_interface *mixer,
781 struct scarlett2_usb_volume_status *buf)
782{
783 return scarlett2_usb_get(mixer, SCARLETT2_USB_VOLUME_STATUS_OFFSET,
784 buf, sizeof(*buf));
785}
786
787/* Send a USB message to set the volumes for all inputs of one mix
788 * (values obtained from private->mix[])
789 */
790static int scarlett2_usb_set_mix(struct usb_mixer_interface *mixer,
791 int mix_num)
792{
793 struct scarlett2_mixer_data *private = mixer->private_data;
794 const struct scarlett2_device_info *info = private->info;
795
796 struct {
797 u16 mix_num;
798 u16 data[SCARLETT2_INPUT_MIX_MAX];
799 } __packed req;
800
801 int i, j;
802 int num_mixer_in =
803 info->ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT];
804
805 req.mix_num = cpu_to_le16(mix_num);
806
807 for (i = 0, j = mix_num * num_mixer_in; i < num_mixer_in; i++, j++)
808 req.data[i] = cpu_to_le16(
809 scarlett2_mixer_values[private->mix[j]]
810 );
811
812 return scarlett2_usb(mixer, SCARLETT2_USB_SET_MIX,
813 &req, (num_mixer_in + 1) * sizeof(u16),
814 NULL, 0);
815}
816
817/* Convert a port number index (per info->ports) to a hardware ID */
818static u32 scarlett2_mux_src_num_to_id(const struct scarlett2_ports *ports,
819 int num)
820{
821 int port_type;
822
823 for (port_type = 0;
824 port_type < SCARLETT2_PORT_TYPE_COUNT;
825 port_type++) {
826 if (num < ports[port_type].num[SCARLETT2_PORT_IN])
827 return ports[port_type].id | num;
828 num -= ports[port_type].num[SCARLETT2_PORT_IN];
829 }
830
831 /* Oops */
832 return 0;
833}
834
835/* Send USB messages to set mux inputs */
836static int scarlett2_usb_set_mux(struct usb_mixer_interface *mixer)
837{
838 struct scarlett2_mixer_data *private = mixer->private_data;
839 const struct scarlett2_device_info *info = private->info;
840 const struct scarlett2_ports *ports = info->ports;
841 int rate, port_dir_rate;
842
843 static const int assignment_order[SCARLETT2_PORT_TYPE_COUNT] = {
844 SCARLETT2_PORT_TYPE_PCM,
845 SCARLETT2_PORT_TYPE_ANALOGUE,
846 SCARLETT2_PORT_TYPE_SPDIF,
847 SCARLETT2_PORT_TYPE_ADAT,
848 SCARLETT2_PORT_TYPE_MIX,
849 SCARLETT2_PORT_TYPE_NONE,
850 };
851
852 struct {
853 u16 pad;
854 u16 num;
855 u32 data[SCARLETT2_MUX_MAX];
856 } __packed req;
857
858 req.pad = 0;
859
860 /* mux settings for each rate */
861 for (rate = 0, port_dir_rate = SCARLETT2_PORT_OUT_44;
862 port_dir_rate <= SCARLETT2_PORT_OUT_176;
863 rate++, port_dir_rate++) {
864 int order_num, i, err;
865
866 req.num = cpu_to_le16(rate);
867
868 for (order_num = 0, i = 0;
869 order_num < SCARLETT2_PORT_TYPE_COUNT;
870 order_num++) {
871 int port_type = assignment_order[order_num];
872 int j = scarlett2_get_port_start_num(ports,
873 SCARLETT2_PORT_OUT,
874 port_type);
875 int port_id = ports[port_type].id;
876 int channel;
877
878 for (channel = 0;
879 channel < ports[port_type].num[port_dir_rate];
880 channel++, i++, j++)
881 /* lower 12 bits for the destination and
882 * next 12 bits for the source
883 */
884 req.data[i] = !port_id
885 ? 0
886 : cpu_to_le32(
887 port_id |
888 channel |
889 scarlett2_mux_src_num_to_id(
890 ports, private->mux[j]
891 ) << 12
892 );
893
894 /* skip private->mux[j] entries not output */
895 j += ports[port_type].num[SCARLETT2_PORT_OUT] -
896 ports[port_type].num[port_dir_rate];
897 }
898
899 err = scarlett2_usb(mixer, SCARLETT2_USB_SET_MUX,
900 &req, (i + 1) * sizeof(u32),
901 NULL, 0);
902 if (err < 0)
903 return err;
904 }
905
906 return 0;
907}
908
909/* Send USB message to get meter levels */
910static int scarlett2_usb_get_meter_levels(struct usb_mixer_interface *mixer,
911 u16 *levels)
912{
913 struct {
914 u16 pad;
915 u16 num_meters;
916 u32 magic;
917 } __packed req;
918 u32 resp[SCARLETT2_NUM_METERS];
919 int i, err;
920
921 req.pad = 0;
922 req.num_meters = cpu_to_le16(SCARLETT2_NUM_METERS);
923 req.magic = cpu_to_le32(SCARLETT2_USB_METER_LEVELS_GET_MAGIC);
924 err = scarlett2_usb(mixer, SCARLETT2_USB_GET_METER_LEVELS,
925 &req, sizeof(req), resp, sizeof(resp));
926 if (err < 0)
927 return err;
928
929 /* copy, convert to u16 */
930 for (i = 0; i < SCARLETT2_NUM_METERS; i++)
931 levels[i] = resp[i];
932
933 return 0;
934}
935
936/*** Control Functions ***/
937
938/* helper function to create a new control */
939static int scarlett2_add_new_ctl(struct usb_mixer_interface *mixer,
940 const struct snd_kcontrol_new *ncontrol,
941 int index, int channels, const char *name,
942 struct snd_kcontrol **kctl_return)
943{
944 struct snd_kcontrol *kctl;
945 struct usb_mixer_elem_info *elem;
946 int err;
947
948 elem = kzalloc(sizeof(*elem), GFP_KERNEL);
949 if (!elem)
950 return -ENOMEM;
951
952 elem->head.mixer = mixer;
953 elem->control = index;
954 elem->head.id = index;
955 elem->channels = channels;
956
957 kctl = snd_ctl_new1(ncontrol, elem);
958 if (!kctl) {
959 kfree(elem);
960 return -ENOMEM;
961 }
962 kctl->private_free = snd_usb_mixer_elem_free;
963
964 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
965
966 err = snd_usb_mixer_add_control(&elem->head, kctl);
967 if (err < 0)
968 return err;
969
970 if (kctl_return)
971 *kctl_return = kctl;
972
973 return 0;
974}
975
976/*** Analogue Line Out Volume Controls ***/
977
978/* Update hardware volume controls after receiving notification that
979 * they have changed
980 */
981static int scarlett2_update_volumes(struct usb_mixer_interface *mixer)
982{
983 struct scarlett2_mixer_data *private = mixer->private_data;
984 const struct scarlett2_ports *ports = private->info->ports;
985 struct scarlett2_usb_volume_status volume_status;
986 int num_line_out =
987 ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT];
988 int err, i;
989
990 private->vol_updated = 0;
991
992 err = scarlett2_usb_get_volume_status(mixer, &volume_status);
993 if (err < 0)
994 return err;
995
996 private->master_vol = clamp(
997 volume_status.master_vol + SCARLETT2_VOLUME_BIAS,
998 0, SCARLETT2_VOLUME_BIAS);
999
1000 for (i = 0; i < num_line_out; i++) {
1001 if (private->vol_sw_hw_switch[i])
1002 private->vol[i] = private->master_vol;
1003 }
1004
1005 for (i = 0; i < private->info->button_count; i++)
1006 private->buttons[i] = !!volume_status.buttons[i];
1007
1008 return 0;
1009}
1010
1011static int scarlett2_volume_ctl_info(struct snd_kcontrol *kctl,
1012 struct snd_ctl_elem_info *uinfo)
1013{
1014 struct usb_mixer_elem_info *elem = kctl->private_data;
1015
1016 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1017 uinfo->count = elem->channels;
1018 uinfo->value.integer.min = 0;
1019 uinfo->value.integer.max = SCARLETT2_VOLUME_BIAS;
1020 uinfo->value.integer.step = 1;
1021 return 0;
1022}
1023
1024static int scarlett2_master_volume_ctl_get(struct snd_kcontrol *kctl,
1025 struct snd_ctl_elem_value *ucontrol)
1026{
1027 struct usb_mixer_elem_info *elem = kctl->private_data;
1028 struct usb_mixer_interface *mixer = elem->head.mixer;
1029 struct scarlett2_mixer_data *private = mixer->private_data;
1030
1031 if (private->vol_updated) {
1032 mutex_lock(&private->data_mutex);
1033 scarlett2_update_volumes(mixer);
1034 mutex_unlock(&private->data_mutex);
1035 }
1036
1037 ucontrol->value.integer.value[0] = private->master_vol;
1038 return 0;
1039}
1040
1041static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl,
1042 struct snd_ctl_elem_value *ucontrol)
1043{
1044 struct usb_mixer_elem_info *elem = kctl->private_data;
1045 struct usb_mixer_interface *mixer = elem->head.mixer;
1046 struct scarlett2_mixer_data *private = mixer->private_data;
1047 int index = elem->control;
1048
1049 if (private->vol_updated) {
1050 mutex_lock(&private->data_mutex);
1051 scarlett2_update_volumes(mixer);
1052 mutex_unlock(&private->data_mutex);
1053 }
1054
1055 ucontrol->value.integer.value[0] = private->vol[index];
1056 return 0;
1057}
1058
1059static int scarlett2_volume_ctl_put(struct snd_kcontrol *kctl,
1060 struct snd_ctl_elem_value *ucontrol)
1061{
1062 struct usb_mixer_elem_info *elem = kctl->private_data;
1063 struct usb_mixer_interface *mixer = elem->head.mixer;
1064 struct scarlett2_mixer_data *private = mixer->private_data;
1065 int index = elem->control;
1066 int oval, val, err = 0;
1067
1068 mutex_lock(&private->data_mutex);
1069
1070 oval = private->vol[index];
1071 val = ucontrol->value.integer.value[0];
1072
1073 if (oval == val)
1074 goto unlock;
1075
1076 private->vol[index] = val;
1077 err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_LINE_OUT_VOLUME,
1078 index, val - SCARLETT2_VOLUME_BIAS);
1079 if (err == 0)
1080 err = 1;
1081
1082unlock:
1083 mutex_unlock(&private->data_mutex);
1084 return err;
1085}
1086
1087static const DECLARE_TLV_DB_MINMAX(
1088 db_scale_scarlett2_gain, -SCARLETT2_VOLUME_BIAS * 100, 0
1089);
1090
1091static const struct snd_kcontrol_new scarlett2_master_volume_ctl = {
1092 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1093 .access = SNDRV_CTL_ELEM_ACCESS_READ |
1094 SNDRV_CTL_ELEM_ACCESS_TLV_READ,
1095 .name = "",
1096 .info = scarlett2_volume_ctl_info,
1097 .get = scarlett2_master_volume_ctl_get,
1098 .private_value = 0, /* max value */
1099 .tlv = { .p = db_scale_scarlett2_gain }
1100};
1101
1102static const struct snd_kcontrol_new scarlett2_line_out_volume_ctl = {
1103 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1104 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
1105 SNDRV_CTL_ELEM_ACCESS_TLV_READ,
1106 .name = "",
1107 .info = scarlett2_volume_ctl_info,
1108 .get = scarlett2_volume_ctl_get,
1109 .put = scarlett2_volume_ctl_put,
1110 .private_value = 0, /* max value */
1111 .tlv = { .p = db_scale_scarlett2_gain }
1112};
1113
1114/*** HW/SW Volume Switch Controls ***/
1115
1116static int scarlett2_sw_hw_enum_ctl_info(struct snd_kcontrol *kctl,
1117 struct snd_ctl_elem_info *uinfo)
1118{
1119 static const char *const values[2] = {
1120 "SW", "HW"
1121 };
1122
1123 return snd_ctl_enum_info(uinfo, 1, 2, values);
1124}
1125
1126static int scarlett2_sw_hw_enum_ctl_get(struct snd_kcontrol *kctl,
1127 struct snd_ctl_elem_value *ucontrol)
1128{
1129 struct usb_mixer_elem_info *elem = kctl->private_data;
1130 struct scarlett2_mixer_data *private = elem->head.mixer->private_data;
1131
1132 ucontrol->value.enumerated.item[0] =
1133 private->vol_sw_hw_switch[elem->control];
1134 return 0;
1135}
1136
1137static int scarlett2_sw_hw_enum_ctl_put(struct snd_kcontrol *kctl,
1138 struct snd_ctl_elem_value *ucontrol)
1139{
1140 struct usb_mixer_elem_info *elem = kctl->private_data;
1141 struct usb_mixer_interface *mixer = elem->head.mixer;
1142 struct scarlett2_mixer_data *private = mixer->private_data;
1143
1144 int index = elem->control;
1145 int oval, val, err = 0;
1146
1147 mutex_lock(&private->data_mutex);
1148
1149 oval = private->vol_sw_hw_switch[index];
1150 val = !!ucontrol->value.integer.value[0];
1151
1152 if (oval == val)
1153 goto unlock;
1154
1155 private->vol_sw_hw_switch[index] = val;
1156
1157 /* Change access mode to RO (hardware controlled volume)
1158 * or RW (software controlled volume)
1159 */
1160 if (val)
1161 private->vol_ctls[index]->vd[0].access &=
1162 ~SNDRV_CTL_ELEM_ACCESS_WRITE;
1163 else
1164 private->vol_ctls[index]->vd[0].access |=
1165 SNDRV_CTL_ELEM_ACCESS_WRITE;
1166
1167 /* Reset volume to master volume */
1168 private->vol[index] = private->master_vol;
1169
1170 /* Set SW volume to current HW volume */
1171 err = scarlett2_usb_set_config(
1172 mixer, SCARLETT2_CONFIG_LINE_OUT_VOLUME,
1173 index, private->master_vol - SCARLETT2_VOLUME_BIAS);
1174 if (err < 0)
1175 goto unlock;
1176
1177 /* Notify of RO/RW change */
1178 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_INFO,
1179 &private->vol_ctls[index]->id);
1180
1181 /* Send SW/HW switch change to the device */
1182 err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_SW_HW_SWITCH,
1183 index, val);
1184
1185unlock:
1186 mutex_unlock(&private->data_mutex);
1187 return err;
1188}
1189
1190static const struct snd_kcontrol_new scarlett2_sw_hw_enum_ctl = {
1191 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1192 .name = "",
1193 .info = scarlett2_sw_hw_enum_ctl_info,
1194 .get = scarlett2_sw_hw_enum_ctl_get,
1195 .put = scarlett2_sw_hw_enum_ctl_put,
1196};
1197
1198/*** Line Level/Instrument Level Switch Controls ***/
1199
1200static int scarlett2_level_enum_ctl_info(struct snd_kcontrol *kctl,
1201 struct snd_ctl_elem_info *uinfo)
1202{
1203 static const char *const values[2] = {
1204 "Line", "Inst"
1205 };
1206
1207 return snd_ctl_enum_info(uinfo, 1, 2, values);
1208}
1209
1210static int scarlett2_level_enum_ctl_get(struct snd_kcontrol *kctl,
1211 struct snd_ctl_elem_value *ucontrol)
1212{
1213 struct usb_mixer_elem_info *elem = kctl->private_data;
1214 struct scarlett2_mixer_data *private = elem->head.mixer->private_data;
1215
1216 ucontrol->value.enumerated.item[0] =
1217 private->level_switch[elem->control];
1218 return 0;
1219}
1220
1221static int scarlett2_level_enum_ctl_put(struct snd_kcontrol *kctl,
1222 struct snd_ctl_elem_value *ucontrol)
1223{
1224 struct usb_mixer_elem_info *elem = kctl->private_data;
1225 struct usb_mixer_interface *mixer = elem->head.mixer;
1226 struct scarlett2_mixer_data *private = mixer->private_data;
1227
1228 int index = elem->control;
1229 int oval, val, err = 0;
1230
1231 mutex_lock(&private->data_mutex);
1232
1233 oval = private->level_switch[index];
1234 val = !!ucontrol->value.integer.value[0];
1235
1236 if (oval == val)
1237 goto unlock;
1238
1239 private->level_switch[index] = val;
1240
1241 /* Send switch change to the device */
1242 err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_LEVEL_SWITCH,
1243 index, val);
1244
1245unlock:
1246 mutex_unlock(&private->data_mutex);
1247 return err;
1248}
1249
1250static const struct snd_kcontrol_new scarlett2_level_enum_ctl = {
1251 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1252 .name = "",
1253 .info = scarlett2_level_enum_ctl_info,
1254 .get = scarlett2_level_enum_ctl_get,
1255 .put = scarlett2_level_enum_ctl_put,
1256};
1257
1258/*** Pad Switch Controls ***/
1259
1260static int scarlett2_pad_ctl_get(struct snd_kcontrol *kctl,
1261 struct snd_ctl_elem_value *ucontrol)
1262{
1263 struct usb_mixer_elem_info *elem = kctl->private_data;
1264 struct scarlett2_mixer_data *private = elem->head.mixer->private_data;
1265
1266 ucontrol->value.enumerated.item[0] =
1267 private->pad_switch[elem->control];
1268 return 0;
1269}
1270
1271static int scarlett2_pad_ctl_put(struct snd_kcontrol *kctl,
1272 struct snd_ctl_elem_value *ucontrol)
1273{
1274 struct usb_mixer_elem_info *elem = kctl->private_data;
1275 struct usb_mixer_interface *mixer = elem->head.mixer;
1276 struct scarlett2_mixer_data *private = mixer->private_data;
1277
1278 int index = elem->control;
1279 int oval, val, err = 0;
1280
1281 mutex_lock(&private->data_mutex);
1282
1283 oval = private->pad_switch[index];
1284 val = !!ucontrol->value.integer.value[0];
1285
1286 if (oval == val)
1287 goto unlock;
1288
1289 private->pad_switch[index] = val;
1290
1291 /* Send switch change to the device */
1292 err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_PAD_SWITCH,
1293 index, val);
1294
1295unlock:
1296 mutex_unlock(&private->data_mutex);
1297 return err;
1298}
1299
1300static const struct snd_kcontrol_new scarlett2_pad_ctl = {
1301 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1302 .name = "",
1303 .info = snd_ctl_boolean_mono_info,
1304 .get = scarlett2_pad_ctl_get,
1305 .put = scarlett2_pad_ctl_put,
1306};
1307
1308/*** Mute/Dim Controls ***/
1309
1310static int scarlett2_button_ctl_get(struct snd_kcontrol *kctl,
1311 struct snd_ctl_elem_value *ucontrol)
1312{
1313 struct usb_mixer_elem_info *elem = kctl->private_data;
1314 struct usb_mixer_interface *mixer = elem->head.mixer;
1315 struct scarlett2_mixer_data *private = mixer->private_data;
1316
1317 if (private->vol_updated) {
1318 mutex_lock(&private->data_mutex);
1319 scarlett2_update_volumes(mixer);
1320 mutex_unlock(&private->data_mutex);
1321 }
1322
1323 ucontrol->value.enumerated.item[0] = private->buttons[elem->control];
1324 return 0;
1325}
1326
1327static int scarlett2_button_ctl_put(struct snd_kcontrol *kctl,
1328 struct snd_ctl_elem_value *ucontrol)
1329{
1330 struct usb_mixer_elem_info *elem = kctl->private_data;
1331 struct usb_mixer_interface *mixer = elem->head.mixer;
1332 struct scarlett2_mixer_data *private = mixer->private_data;
1333
1334 int index = elem->control;
1335 int oval, val, err = 0;
1336
1337 mutex_lock(&private->data_mutex);
1338
1339 oval = private->buttons[index];
1340 val = !!ucontrol->value.integer.value[0];
1341
1342 if (oval == val)
1343 goto unlock;
1344
1345 private->buttons[index] = val;
1346
1347 /* Send switch change to the device */
1348 err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_BUTTONS,
1349 index, val);
1350
1351unlock:
1352 mutex_unlock(&private->data_mutex);
1353 return err;
1354}
1355
1356static const struct snd_kcontrol_new scarlett2_button_ctl = {
1357 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1358 .name = "",
1359 .info = snd_ctl_boolean_mono_info,
1360 .get = scarlett2_button_ctl_get,
1361 .put = scarlett2_button_ctl_put
1362};
1363
1364/*** Create the analogue output controls ***/
1365
1366static int scarlett2_add_line_out_ctls(struct usb_mixer_interface *mixer)
1367{
1368 struct scarlett2_mixer_data *private = mixer->private_data;
1369 const struct scarlett2_device_info *info = private->info;
1370 const struct scarlett2_ports *ports = info->ports;
1371 int num_line_out =
1372 ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT];
1373 int err, i;
1374 char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
1375
1376 /* Add R/O HW volume control */
1377 if (info->line_out_hw_vol) {
1378 snprintf(s, sizeof(s), "Master HW Playback Volume");
1379 err = scarlett2_add_new_ctl(mixer,
1380 &scarlett2_master_volume_ctl,
1381 0, 1, s, &private->master_vol_ctl);
1382 if (err < 0)
1383 return err;
1384 }
1385
1386 /* Add volume controls */
1387 for (i = 0; i < num_line_out; i++) {
1388
1389 /* Fader */
1390 if (info->line_out_descrs[i])
1391 snprintf(s, sizeof(s),
1392 "Line %02d (%s) Playback Volume",
1393 i + 1, info->line_out_descrs[i]);
1394 else
1395 snprintf(s, sizeof(s),
1396 "Line %02d Playback Volume",
1397 i + 1);
1398 err = scarlett2_add_new_ctl(mixer,
1399 &scarlett2_line_out_volume_ctl,
1400 i, 1, s, &private->vol_ctls[i]);
1401 if (err < 0)
1402 return err;
1403
1404 /* Make the fader read-only if the SW/HW switch is set to HW */
1405 if (private->vol_sw_hw_switch[i])
1406 private->vol_ctls[i]->vd[0].access &=
1407 ~SNDRV_CTL_ELEM_ACCESS_WRITE;
1408
1409 /* SW/HW Switch */
1410 if (info->line_out_hw_vol) {
1411 snprintf(s, sizeof(s),
1412 "Line Out %02d Volume Control Playback Enum",
1413 i + 1);
1414 err = scarlett2_add_new_ctl(mixer,
1415 &scarlett2_sw_hw_enum_ctl,
1416 i, 1, s, NULL);
1417 if (err < 0)
1418 return err;
1419 }
1420 }
1421
1422 /* Add HW button controls */
1423 for (i = 0; i < private->info->button_count; i++) {
1424 err = scarlett2_add_new_ctl(mixer, &scarlett2_button_ctl,
1425 i, 1, scarlett2_button_names[i],
1426 &private->button_ctls[i]);
1427 if (err < 0)
1428 return err;
1429 }
1430
1431 return 0;
1432}
1433
1434/*** Create the analogue input controls ***/
1435
1436static int scarlett2_add_line_in_ctls(struct usb_mixer_interface *mixer)
1437{
1438 struct scarlett2_mixer_data *private = mixer->private_data;
1439 const struct scarlett2_device_info *info = private->info;
1440 int err, i;
1441 char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
1442
1443 /* Add input level (line/inst) controls */
1444 for (i = 0; i < info->level_input_count; i++) {
1445 snprintf(s, sizeof(s), "Line In %d Level Capture Enum", i + 1);
1446 err = scarlett2_add_new_ctl(mixer, &scarlett2_level_enum_ctl,
1447 i, 1, s, NULL);
1448 if (err < 0)
1449 return err;
1450 }
1451
1452 /* Add input pad controls */
1453 for (i = 0; i < info->pad_input_count; i++) {
1454 snprintf(s, sizeof(s), "Line In %d Pad Capture Switch", i + 1);
1455 err = scarlett2_add_new_ctl(mixer, &scarlett2_pad_ctl,
1456 i, 1, s, NULL);
1457 if (err < 0)
1458 return err;
1459 }
1460
1461 return 0;
1462}
1463
1464/*** Mixer Volume Controls ***/
1465
1466static int scarlett2_mixer_ctl_info(struct snd_kcontrol *kctl,
1467 struct snd_ctl_elem_info *uinfo)
1468{
1469 struct usb_mixer_elem_info *elem = kctl->private_data;
1470
1471 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1472 uinfo->count = elem->channels;
1473 uinfo->value.integer.min = 0;
1474 uinfo->value.integer.max = SCARLETT2_MIXER_MAX_VALUE;
1475 uinfo->value.integer.step = 1;
1476 return 0;
1477}
1478
1479static int scarlett2_mixer_ctl_get(struct snd_kcontrol *kctl,
1480 struct snd_ctl_elem_value *ucontrol)
1481{
1482 struct usb_mixer_elem_info *elem = kctl->private_data;
1483 struct scarlett2_mixer_data *private = elem->head.mixer->private_data;
1484
1485 ucontrol->value.integer.value[0] = private->mix[elem->control];
1486 return 0;
1487}
1488
1489static int scarlett2_mixer_ctl_put(struct snd_kcontrol *kctl,
1490 struct snd_ctl_elem_value *ucontrol)
1491{
1492 struct usb_mixer_elem_info *elem = kctl->private_data;
1493 struct usb_mixer_interface *mixer = elem->head.mixer;
1494 struct scarlett2_mixer_data *private = mixer->private_data;
1495 const struct scarlett2_device_info *info = private->info;
1496 const struct scarlett2_ports *ports = info->ports;
1497 int oval, val, num_mixer_in, mix_num, err = 0;
1498
1499 mutex_lock(&private->data_mutex);
1500
1501 oval = private->mix[elem->control];
1502 val = ucontrol->value.integer.value[0];
1503 num_mixer_in = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT];
1504 mix_num = elem->control / num_mixer_in;
1505
1506 if (oval == val)
1507 goto unlock;
1508
1509 private->mix[elem->control] = val;
1510 err = scarlett2_usb_set_mix(mixer, mix_num);
1511 if (err == 0)
1512 err = 1;
1513
1514unlock:
1515 mutex_unlock(&private->data_mutex);
1516 return err;
1517}
1518
1519static const DECLARE_TLV_DB_MINMAX(
1520 db_scale_scarlett2_mixer,
1521 SCARLETT2_MIXER_MIN_DB * 100,
1522 SCARLETT2_MIXER_MAX_DB * 100
1523);
1524
1525static const struct snd_kcontrol_new scarlett2_mixer_ctl = {
1526 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1527 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
1528 SNDRV_CTL_ELEM_ACCESS_TLV_READ,
1529 .name = "",
1530 .info = scarlett2_mixer_ctl_info,
1531 .get = scarlett2_mixer_ctl_get,
1532 .put = scarlett2_mixer_ctl_put,
1533 .private_value = SCARLETT2_MIXER_MAX_DB, /* max value */
1534 .tlv = { .p = db_scale_scarlett2_mixer }
1535};
1536
1537static int scarlett2_add_mixer_ctls(struct usb_mixer_interface *mixer)
1538{
1539 struct scarlett2_mixer_data *private = mixer->private_data;
1540 const struct scarlett2_ports *ports = private->info->ports;
1541 int err, i, j;
1542 int index;
1543 char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
1544
1545 int num_inputs = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT];
1546 int num_outputs = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_IN];
1547
1548 for (i = 0, index = 0; i < num_outputs; i++) {
1549 for (j = 0; j < num_inputs; j++, index++) {
1550 snprintf(s, sizeof(s),
1551 "Mix %c Input %02d Playback Volume",
1552 'A' + i, j + 1);
1553 err = scarlett2_add_new_ctl(mixer, &scarlett2_mixer_ctl,
1554 index, 1, s, NULL);
1555 if (err < 0)
1556 return err;
1557 }
1558 }
1559
1560 return 0;
1561}
1562
1563/*** Mux Source Selection Controls ***/
1564
1565static int scarlett2_mux_src_enum_ctl_info(struct snd_kcontrol *kctl,
1566 struct snd_ctl_elem_info *uinfo)
1567{
1568 struct usb_mixer_elem_info *elem = kctl->private_data;
1569 struct scarlett2_mixer_data *private = elem->head.mixer->private_data;
1570 const struct scarlett2_ports *ports = private->info->ports;
1571 unsigned int item = uinfo->value.enumerated.item;
1572 int items = private->num_mux_srcs;
1573 int port_type;
1574
1575 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1576 uinfo->count = elem->channels;
1577 uinfo->value.enumerated.items = items;
1578
1579 if (item >= items)
1580 item = uinfo->value.enumerated.item = items - 1;
1581
1582 for (port_type = 0;
1583 port_type < SCARLETT2_PORT_TYPE_COUNT;
1584 port_type++) {
1585 if (item < ports[port_type].num[SCARLETT2_PORT_IN]) {
1586 sprintf(uinfo->value.enumerated.name,
1587 ports[port_type].src_descr,
1588 item + ports[port_type].src_num_offset);
1589 return 0;
1590 }
1591 item -= ports[port_type].num[SCARLETT2_PORT_IN];
1592 }
1593
1594 return -EINVAL;
1595}
1596
1597static int scarlett2_mux_src_enum_ctl_get(struct snd_kcontrol *kctl,
1598 struct snd_ctl_elem_value *ucontrol)
1599{
1600 struct usb_mixer_elem_info *elem = kctl->private_data;
1601 struct scarlett2_mixer_data *private = elem->head.mixer->private_data;
1602
1603 ucontrol->value.enumerated.item[0] = private->mux[elem->control];
1604 return 0;
1605}
1606
1607static int scarlett2_mux_src_enum_ctl_put(struct snd_kcontrol *kctl,
1608 struct snd_ctl_elem_value *ucontrol)
1609{
1610 struct usb_mixer_elem_info *elem = kctl->private_data;
1611 struct usb_mixer_interface *mixer = elem->head.mixer;
1612 struct scarlett2_mixer_data *private = mixer->private_data;
1613 int index = elem->control;
1614 int oval, val, err = 0;
1615
1616 mutex_lock(&private->data_mutex);
1617
1618 oval = private->mux[index];
1619 val = clamp(ucontrol->value.integer.value[0],
1620 0L, private->num_mux_srcs - 1L);
1621
1622 if (oval == val)
1623 goto unlock;
1624
1625 private->mux[index] = val;
1626 err = scarlett2_usb_set_mux(mixer);
1627 if (err == 0)
1628 err = 1;
1629
1630unlock:
1631 mutex_unlock(&private->data_mutex);
1632 return err;
1633}
1634
1635static const struct snd_kcontrol_new scarlett2_mux_src_enum_ctl = {
1636 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1637 .name = "",
1638 .info = scarlett2_mux_src_enum_ctl_info,
1639 .get = scarlett2_mux_src_enum_ctl_get,
1640 .put = scarlett2_mux_src_enum_ctl_put,
1641};
1642
1643static int scarlett2_add_mux_enums(struct usb_mixer_interface *mixer)
1644{
1645 struct scarlett2_mixer_data *private = mixer->private_data;
1646 const struct scarlett2_ports *ports = private->info->ports;
1647 int port_type, channel, i;
1648
1649 for (i = 0, port_type = 0;
1650 port_type < SCARLETT2_PORT_TYPE_COUNT;
1651 port_type++) {
1652 for (channel = 0;
1653 channel < ports[port_type].num[SCARLETT2_PORT_OUT];
1654 channel++, i++) {
1655 int err;
1656 char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
1657 const char *const descr = ports[port_type].dst_descr;
1658
1659 snprintf(s, sizeof(s) - 5, descr, channel + 1);
1660 strcat(s, " Enum");
1661
1662 err = scarlett2_add_new_ctl(mixer,
1663 &scarlett2_mux_src_enum_ctl,
1664 i, 1, s, NULL);
1665 if (err < 0)
1666 return err;
1667 }
1668 }
1669
1670 return 0;
1671}
1672
1673/*** Meter Controls ***/
1674
1675static int scarlett2_meter_ctl_info(struct snd_kcontrol *kctl,
1676 struct snd_ctl_elem_info *uinfo)
1677{
1678 struct usb_mixer_elem_info *elem = kctl->private_data;
1679
1680 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1681 uinfo->count = elem->channels;
1682 uinfo->value.integer.min = 0;
1683 uinfo->value.integer.max = 4095;
1684 uinfo->value.integer.step = 1;
1685 return 0;
1686}
1687
1688static int scarlett2_meter_ctl_get(struct snd_kcontrol *kctl,
1689 struct snd_ctl_elem_value *ucontrol)
1690{
1691 struct usb_mixer_elem_info *elem = kctl->private_data;
1692 u16 meter_levels[SCARLETT2_NUM_METERS];
1693 int i, err;
1694
1695 err = scarlett2_usb_get_meter_levels(elem->head.mixer, meter_levels);
1696 if (err < 0)
1697 return err;
1698
1699 for (i = 0; i < elem->channels; i++)
1700 ucontrol->value.integer.value[i] = meter_levels[i];
1701
1702 return 0;
1703}
1704
1705static const struct snd_kcontrol_new scarlett2_meter_ctl = {
1706 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
1707 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1708 .name = "",
1709 .info = scarlett2_meter_ctl_info,
1710 .get = scarlett2_meter_ctl_get
1711};
1712
1713static int scarlett2_add_meter_ctl(struct usb_mixer_interface *mixer)
1714{
1715 return scarlett2_add_new_ctl(mixer, &scarlett2_meter_ctl,
1716 0, SCARLETT2_NUM_METERS,
1717 "Level Meter", NULL);
1718}
1719
1720/*** Cleanup/Suspend Callbacks ***/
1721
1722static void scarlett2_private_free(struct usb_mixer_interface *mixer)
1723{
1724 struct scarlett2_mixer_data *private = mixer->private_data;
1725
1726 cancel_delayed_work_sync(&private->work);
1727 kfree(private);
1728 mixer->private_data = NULL;
1729}
1730
1731static void scarlett2_private_suspend(struct usb_mixer_interface *mixer)
1732{
1733 struct scarlett2_mixer_data *private = mixer->private_data;
1734
1735 if (cancel_delayed_work_sync(&private->work))
1736 scarlett2_config_save(private->mixer);
1737}
1738
1739/*** Initialisation ***/
1740
1741static int scarlett2_count_mux_srcs(const struct scarlett2_ports *ports)
1742{
1743 int port_type, count = 0;
1744
1745 for (port_type = 0;
1746 port_type < SCARLETT2_PORT_TYPE_COUNT;
1747 port_type++)
1748 count += ports[port_type].num[SCARLETT2_PORT_IN];
1749
1750 return count;
1751}
1752
1753/* Default routing connects PCM outputs and inputs to Analogue,
1754 * S/PDIF, then ADAT
1755 */
1756static void scarlett2_init_routing(u8 *mux,
1757 const struct scarlett2_ports *ports)
1758{
1759 int i, input_num, input_count, port_type;
1760 int output_num, output_count, port_type_connect_num;
1761
1762 static const int connect_order[] = {
1763 SCARLETT2_PORT_TYPE_ANALOGUE,
1764 SCARLETT2_PORT_TYPE_SPDIF,
1765 SCARLETT2_PORT_TYPE_ADAT,
1766 -1
1767 };
1768
1769 /* Assign PCM inputs (routing outputs) */
1770 output_num = scarlett2_get_port_start_num(ports,
1771 SCARLETT2_PORT_OUT,
1772 SCARLETT2_PORT_TYPE_PCM);
1773 output_count = ports[SCARLETT2_PORT_TYPE_PCM].num[SCARLETT2_PORT_OUT];
1774
1775 for (port_type = connect_order[port_type_connect_num = 0];
1776 port_type >= 0;
1777 port_type = connect_order[++port_type_connect_num]) {
1778 input_num = scarlett2_get_port_start_num(
1779 ports, SCARLETT2_PORT_IN, port_type);
1780 input_count = ports[port_type].num[SCARLETT2_PORT_IN];
1781 for (i = 0;
1782 i < input_count && output_count;
1783 i++, output_count--)
1784 mux[output_num++] = input_num++;
1785 }
1786
1787 /* Assign PCM outputs (routing inputs) */
1788 input_num = scarlett2_get_port_start_num(ports,
1789 SCARLETT2_PORT_IN,
1790 SCARLETT2_PORT_TYPE_PCM);
1791 input_count = ports[SCARLETT2_PORT_TYPE_PCM].num[SCARLETT2_PORT_IN];
1792
1793 for (port_type = connect_order[port_type_connect_num = 0];
1794 port_type >= 0;
1795 port_type = connect_order[++port_type_connect_num]) {
1796 output_num = scarlett2_get_port_start_num(
1797 ports, SCARLETT2_PORT_OUT, port_type);
1798 output_count = ports[port_type].num[SCARLETT2_PORT_OUT];
1799 for (i = 0;
1800 i < output_count && input_count;
1801 i++, input_count--)
1802 mux[output_num++] = input_num++;
1803 }
1804}
1805
1806/* Initialise private data, routing, sequence number */
1807static int scarlett2_init_private(struct usb_mixer_interface *mixer,
1808 const struct scarlett2_device_info *info)
1809{
1810 struct scarlett2_mixer_data *private =
1811 kzalloc(sizeof(struct scarlett2_mixer_data), GFP_KERNEL);
1812
1813 if (!private)
1814 return -ENOMEM;
1815
1816 mutex_init(&private->usb_mutex);
1817 mutex_init(&private->data_mutex);
1818 INIT_DELAYED_WORK(&private->work, scarlett2_config_save_work);
1819 private->info = info;
1820 private->num_mux_srcs = scarlett2_count_mux_srcs(info->ports);
1821 private->scarlett2_seq = 0;
1822 private->mixer = mixer;
1823 mixer->private_data = private;
1824 mixer->private_free = scarlett2_private_free;
1825 mixer->private_suspend = scarlett2_private_suspend;
1826
1827 /* Setup default routing */
1828 scarlett2_init_routing(private->mux, info->ports);
1829
1830 /* Initialise the sequence number used for the proprietary commands */
1831 return scarlett2_usb(mixer, SCARLETT2_USB_INIT_SEQ, NULL, 0, NULL, 0);
1832}
1833
1834/* Read line-in config and line-out volume settings on start */
1835static int scarlett2_read_configs(struct usb_mixer_interface *mixer)
1836{
1837 struct scarlett2_mixer_data *private = mixer->private_data;
1838 const struct scarlett2_device_info *info = private->info;
1839 const struct scarlett2_ports *ports = info->ports;
1840 int num_line_out =
1841 ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT];
1842 u8 level_switches[SCARLETT2_LEVEL_SWITCH_MAX];
1843 u8 pad_switches[SCARLETT2_PAD_SWITCH_MAX];
1844 struct scarlett2_usb_volume_status volume_status;
1845 int err, i;
1846
1847 if (info->level_input_count) {
1848 err = scarlett2_usb_get_config(
1849 mixer,
1850 SCARLETT2_CONFIG_LEVEL_SWITCH,
1851 info->level_input_count,
1852 level_switches);
1853 if (err < 0)
1854 return err;
1855 for (i = 0; i < info->level_input_count; i++)
1856 private->level_switch[i] = level_switches[i];
1857 }
1858
1859 if (info->pad_input_count) {
1860 err = scarlett2_usb_get_config(
1861 mixer,
1862 SCARLETT2_CONFIG_PAD_SWITCH,
1863 info->pad_input_count,
1864 pad_switches);
1865 if (err < 0)
1866 return err;
1867 for (i = 0; i < info->pad_input_count; i++)
1868 private->pad_switch[i] = pad_switches[i];
1869 }
1870
1871 err = scarlett2_usb_get_volume_status(mixer, &volume_status);
1872 if (err < 0)
1873 return err;
1874
1875 private->master_vol = clamp(
1876 volume_status.master_vol + SCARLETT2_VOLUME_BIAS,
1877 0, SCARLETT2_VOLUME_BIAS);
1878
1879 for (i = 0; i < num_line_out; i++) {
1880 int volume;
1881
1882 private->vol_sw_hw_switch[i] =
1883 info->line_out_hw_vol
1884 && volume_status.sw_hw_switch[i];
1885
1886 volume = private->vol_sw_hw_switch[i]
1887 ? volume_status.master_vol
1888 : volume_status.sw_vol[i];
1889 volume = clamp(volume + SCARLETT2_VOLUME_BIAS,
1890 0, SCARLETT2_VOLUME_BIAS);
1891 private->vol[i] = volume;
1892 }
1893
1894 for (i = 0; i < info->button_count; i++)
1895 private->buttons[i] = !!volume_status.buttons[i];
1896
1897 return 0;
1898}
1899
1900/* Notify on volume change */
1901static void scarlett2_mixer_interrupt_vol_change(
1902 struct usb_mixer_interface *mixer)
1903{
1904 struct scarlett2_mixer_data *private = mixer->private_data;
1905 const struct scarlett2_ports *ports = private->info->ports;
1906 int num_line_out =
1907 ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT];
1908 int i;
1909
1910 private->vol_updated = 1;
1911
1912 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1913 &private->master_vol_ctl->id);
1914
1915 for (i = 0; i < num_line_out; i++) {
1916 if (!private->vol_sw_hw_switch[i])
1917 continue;
1918 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1919 &private->vol_ctls[i]->id);
1920 }
1921}
1922
1923/* Notify on button change */
1924static void scarlett2_mixer_interrupt_button_change(
1925 struct usb_mixer_interface *mixer)
1926{
1927 struct scarlett2_mixer_data *private = mixer->private_data;
1928 int i;
1929
1930 private->vol_updated = 1;
1931
1932 for (i = 0; i < private->info->button_count; i++)
1933 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1934 &private->button_ctls[i]->id);
1935}
1936
1937/* Interrupt callback */
1938static void scarlett2_mixer_interrupt(struct urb *urb)
1939{
1940 struct usb_mixer_interface *mixer = urb->context;
1941 int len = urb->actual_length;
1942 int ustatus = urb->status;
1943 u32 data;
1944
1945 if (ustatus != 0)
1946 goto requeue;
1947
1948 if (len == 8) {
1949 data = le32_to_cpu(*(u32 *)urb->transfer_buffer);
1950 if (data & SCARLETT2_USB_INTERRUPT_VOL_CHANGE)
1951 scarlett2_mixer_interrupt_vol_change(mixer);
1952 if (data & SCARLETT2_USB_INTERRUPT_BUTTON_CHANGE)
1953 scarlett2_mixer_interrupt_button_change(mixer);
1954 } else {
1955 usb_audio_err(mixer->chip,
1956 "scarlett mixer interrupt length %d\n", len);
1957 }
1958
1959requeue:
1960 if (ustatus != -ENOENT &&
1961 ustatus != -ECONNRESET &&
1962 ustatus != -ESHUTDOWN) {
1963 urb->dev = mixer->chip->dev;
1964 usb_submit_urb(urb, GFP_ATOMIC);
1965 }
1966}
1967
1968static int scarlett2_mixer_status_create(struct usb_mixer_interface *mixer)
1969{
1970 struct usb_device *dev = mixer->chip->dev;
1971 unsigned int pipe = usb_rcvintpipe(dev,
1972 SCARLETT2_USB_INTERRUPT_ENDPOINT);
1973 void *transfer_buffer;
1974
1975 if (mixer->urb) {
1976 usb_audio_err(mixer->chip,
1977 "%s: mixer urb already in use!\n", __func__);
1978 return 0;
1979 }
1980
1981 if (snd_usb_pipe_sanity_check(dev, pipe))
1982 return -EINVAL;
1983
1984 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
1985 if (!mixer->urb)
1986 return -ENOMEM;
1987
1988 transfer_buffer = kmalloc(SCARLETT2_USB_INTERRUPT_MAX_DATA, GFP_KERNEL);
1989 if (!transfer_buffer)
1990 return -ENOMEM;
1991
1992 usb_fill_int_urb(mixer->urb, dev, pipe,
1993 transfer_buffer, SCARLETT2_USB_INTERRUPT_MAX_DATA,
1994 scarlett2_mixer_interrupt, mixer,
1995 SCARLETT2_USB_INTERRUPT_INTERVAL);
1996
1997 return usb_submit_urb(mixer->urb, GFP_KERNEL);
1998}
1999
2000/* Entry point */
2001int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer)
2002{
2003 const struct scarlett2_device_info *info;
2004 int err;
2005
2006 /* only use UAC_VERSION_2 */
2007 if (!mixer->protocol)
2008 return 0;
2009
2010 switch (mixer->chip->usb_id) {
2011 case USB_ID(0x1235, 0x8203):
2012 info = &s6i6_gen2_info;
2013 break;
2014 case USB_ID(0x1235, 0x8204):
2015 info = &s18i8_gen2_info;
2016 break;
2017 case USB_ID(0x1235, 0x8201):
2018 info = &s18i20_gen2_info;
2019 break;
2020 default: /* device not (yet) supported */
2021 return -EINVAL;
2022 }
2023
2024 if (!(mixer->chip->setup & SCARLETT2_ENABLE)) {
2025 usb_audio_err(mixer->chip,
2026 "Focusrite Scarlett Gen 2 Mixer Driver disabled; "
2027 "use options snd_usb_audio device_setup=1 "
2028 "to enable and report any issues to g@b4.vu");
2029 return 0;
2030 }
2031
2032 /* Initialise private data, routing, sequence number */
2033 err = scarlett2_init_private(mixer, info);
2034 if (err < 0)
2035 return err;
2036
2037 /* Read volume levels and controls from the interface */
2038 err = scarlett2_read_configs(mixer);
2039 if (err < 0)
2040 return err;
2041
2042 /* Create the analogue output controls */
2043 err = scarlett2_add_line_out_ctls(mixer);
2044 if (err < 0)
2045 return err;
2046
2047 /* Create the analogue input controls */
2048 err = scarlett2_add_line_in_ctls(mixer);
2049 if (err < 0)
2050 return err;
2051
2052 /* Create the input, output, and mixer mux input selections */
2053 err = scarlett2_add_mux_enums(mixer);
2054 if (err < 0)
2055 return err;
2056
2057 /* Create the matrix mixer controls */
2058 err = scarlett2_add_mixer_ctls(mixer);
2059 if (err < 0)
2060 return err;
2061
2062 /* Create the level meter controls */
2063 err = scarlett2_add_meter_ctl(mixer);
2064 if (err < 0)
2065 return err;
2066
2067 /* Set up the interrupt polling if there are hardware buttons */
2068 if (info->button_count) {
2069 err = scarlett2_mixer_status_create(mixer);
2070 if (err < 0)
2071 return err;
2072 }
2073
2074 return 0;
2075}