summaryrefslogtreecommitdiff
path: root/tmk_core/protocol/vusb/vusb.c
blob: bb84ec968f1864ca1c433e695d2a43eb4f3b27f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
/*
Copyright 2011 Jun Wako <wakojun@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <avr/eeprom.h>
#include <avr/wdt.h>
#include <stdint.h>
#include "usbdrv.h"
#include "usbconfig.h"
#include "host.h"
#include "report.h"
#include "print.h"
#include "debug.h"
#include "host_driver.h"
#include "vusb.h"
#include "bootloader.h"
#include <util/delay.h>

#if defined(RAW_ENABLE)
#    include "raw_hid.h"
#endif

#if (defined(MOUSE_ENABLE) || defined(EXTRAKEY_ENABLE)) && defined(RAW_ENABLE)
#    error "Enabling Mousekeys/Extrakeys and Raw HID at the same time is not currently supported on V-USB."
#endif

static uint8_t vusb_keyboard_leds = 0;
static uint8_t vusb_idle_rate     = 0;

/* Keyboard report send buffer */
#define KBUF_SIZE 16
static report_keyboard_t kbuf[KBUF_SIZE];
static uint8_t           kbuf_head = 0;
static uint8_t           kbuf_tail = 0;

typedef struct {
    uint8_t modifier;
    uint8_t reserved;
    uint8_t keycode[6];
} keyboard_report_t;

static keyboard_report_t keyboard_report;  // sent to PC

#define VUSB_TRANSFER_KEYBOARD_MAX_TRIES 10

/* transfer keyboard report from buffer */
void vusb_transfer_keyboard(void) {
    for (int i = 0; i < VUSB_TRANSFER_KEYBOARD_MAX_TRIES; i++) {
        if (usbInterruptIsReady()) {
            if (kbuf_head != kbuf_tail) {
                usbSetInterrupt((void *)&kbuf[kbuf_tail], sizeof(report_keyboard_t));
                kbuf_tail = (kbuf_tail + 1) % KBUF_SIZE;
                if (debug_keyboard) {
                    print("V-USB: kbuf[");
                    pdec(kbuf_tail);
                    print("->");
                    pdec(kbuf_head);
                    print("](");
                    phex((kbuf_head < kbuf_tail) ? (KBUF_SIZE - kbuf_tail + kbuf_head) : (kbuf_head - kbuf_tail));
                    print(")\n");
                }
            }
            break;
        }
        usbPoll();
        _delay_ms(1);
    }
}

/*------------------------------------------------------------------*
 * RAW HID
 *------------------------------------------------------------------*/
#ifdef RAW_ENABLE
#    define RAW_BUFFER_SIZE 32
#    define RAW_EPSIZE 8

static uint8_t raw_output_buffer[RAW_BUFFER_SIZE];
static uint8_t raw_output_received_bytes = 0;

void raw_hid_send(uint8_t *data, uint8_t length) {
    if (length != RAW_BUFFER_SIZE) {
        return;
    }

    uint8_t *temp = data;
    for (uint8_t i = 0; i < 4; i++) {
        while (!usbInterruptIsReady3()) {
            usbPoll();
        }
        usbSetInterrupt3(temp, 8);
        temp += 8;
    }
    while (!usbInterruptIsReady3()) {
        usbPoll();
    }
    usbSetInterrupt3(0, 0);
}

__attribute__((weak)) void raw_hid_receive(uint8_t *data, uint8_t length) {
    // Users should #include "raw_hid.h" in their own code
    // and implement this function there. Leave this as weak linkage
    // so users can opt to not handle data coming in.
}

void raw_hid_task(void) {
    if (raw_output_received_bytes == RAW_BUFFER_SIZE) {
        raw_hid_receive(raw_output_buffer, RAW_BUFFER_SIZE);
        raw_output_received_bytes = 0;
    }
}

#endif

/*------------------------------------------------------------------*
 * Host driver
 *------------------------------------------------------------------*/
static uint8_t keyboard_leds(void);
static void    send_keyboard(report_keyboard_t *report);
static void    send_mouse(report_mouse_t *report);
static void    send_system(uint16_t data);
static void    send_consumer(uint16_t data);

static host_driver_t driver = {keyboard_leds, send_keyboard, send_mouse, send_system, send_consumer};

host_driver_t *vusb_driver(void) { return &driver; }

static uint8_t keyboard_leds(void) { return vusb_keyboard_leds; }

static void send_keyboard(report_keyboard_t *report) {
    uint8_t next = (kbuf_head + 1) % KBUF_SIZE;
    if (next != kbuf_tail) {
        kbuf[kbuf_head] = *report;
        kbuf_head       = next;
    } else {
        debug("kbuf: full\n");
    }

    // NOTE: send key strokes of Macro
    usbPoll();
    vusb_transfer_keyboard();
}

typedef struct {
    uint8_t        report_id;
    report_mouse_t report;
} __attribute__((packed)) vusb_mouse_report_t;

static void send_mouse(report_mouse_t *report) {
    vusb_mouse_report_t r = {.report_id = REPORT_ID_MOUSE, .report = *report};
    if (usbInterruptIsReady3()) {
        usbSetInterrupt3((void *)&r, sizeof(vusb_mouse_report_t));
    }
}

#ifdef EXTRAKEY_ENABLE
static void send_extra(uint8_t report_id, uint16_t data) {
    static uint8_t  last_id   = 0;
    static uint16_t last_data = 0;
    if ((report_id == last_id) && (data == last_data)) return;
    last_id   = report_id;
    last_data = data;

    report_extra_t report = {.report_id = report_id, .usage = data};
    if (usbInterruptIsReady3()) {
        usbSetInterrupt3((void *)&report, sizeof(report));
    }
}
#endif

static void send_system(uint16_t data) {
#ifdef EXTRAKEY_ENABLE
    send_extra(REPORT_ID_SYSTEM, data);
#endif
}

static void send_consumer(uint16_t data) {
#ifdef EXTRAKEY_ENABLE
    send_extra(REPORT_ID_CONSUMER, data);
#endif
}

/*------------------------------------------------------------------*
 * Request from host                                                *
 *------------------------------------------------------------------*/
static struct {
    uint16_t len;
    enum { NONE, BOOTLOADER, SET_LED } kind;
} last_req;

usbMsgLen_t usbFunctionSetup(uchar data[8]) {
    usbRequest_t *rq = (void *)data;

    if ((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS) { /* class request type */
        if (rq->bRequest == USBRQ_HID_GET_REPORT) {
            debug("GET_REPORT:");
            /* we only have one report type, so don't look at wValue */
            usbMsgPtr = (void *)&keyboard_report;
            return sizeof(keyboard_report);
        } else if (rq->bRequest == USBRQ_HID_GET_IDLE) {
            debug("GET_IDLE: ");
            // debug_hex(vusb_idle_rate);
            usbMsgPtr = &vusb_idle_rate;
            return 1;
        } else if (rq->bRequest == USBRQ_HID_SET_IDLE) {
            vusb_idle_rate = rq->wValue.bytes[1];
            debug("SET_IDLE: ");
            debug_hex(vusb_idle_rate);
        } else if (rq->bRequest == USBRQ_HID_SET_REPORT) {
            debug("SET_REPORT: ");
            // Report Type: 0x02(Out)/ReportID: 0x00(none) && Interface: 0(keyboard)
            if (rq->wValue.word == 0x0200 && rq->wIndex.word == 0) {
                debug("SET_LED: ");
                last_req.kind = SET_LED;
                last_req.len  = rq->wLength.word;
#ifdef BOOTLOADER_SIZE
            } else if (rq->wValue.word == 0x0301) {
                last_req.kind = BOOTLOADER;
                last_req.len  = rq->wLength.word;
#endif
            }
            return USB_NO_MSG;  // to get data in usbFunctionWrite
        } else {
            debug("UNKNOWN:");
        }
    } else {
        debug("VENDOR:");
        /* no vendor specific requests implemented */
    }
    debug("\n");
    return 0; /* default for not implemented requests: return no data back to host */
}

uchar usbFunctionWrite(uchar *data, uchar len) {
    if (last_req.len == 0) {
        return -1;
    }
    switch (last_req.kind) {
        case SET_LED:
            debug("SET_LED: ");
            debug_hex(data[0]);
            debug("\n");
            vusb_keyboard_leds = data[0];
            last_req.len       = 0;
            return 1;
            break;
        case BOOTLOADER:
            usbDeviceDisconnect();
            bootloader_jump();
            return 1;
            break;
        case NONE:
        default:
            return -1;
            break;
    }
    return 1;
}

void usbFunctionWriteOut(uchar *data, uchar len) {
#ifdef RAW_ENABLE
    // Data from host must be divided every 8bytes
    if (len != 8) {
        debug("RAW: invalid length");
        raw_output_received_bytes = 0;
        return;
    }

    if (raw_output_received_bytes + len > RAW_BUFFER_SIZE) {
        debug("RAW: buffer full");
        raw_output_received_bytes = 0;
    } else {
        for (uint8_t i = 0; i < 8; i++) {
            raw_output_buffer[raw_output_received_bytes + i] = data[i];
        }
        raw_output_received_bytes += len;
    }
#endif
}

/*------------------------------------------------------------------*
 * Descriptors                                                      *
 *------------------------------------------------------------------*/

const PROGMEM uchar keyboard_hid_report[] = {
    0x05, 0x01,  // Usage Page (Generic Desktop)
    0x09, 0x06,  // Usage (Keyboard)
    0xA1, 0x01,  // Collection (Application)
    // Modifiers (8 bits)
    0x05, 0x07,  //   Usage Page (Keyboard/Keypad)
    0x19, 0xE0,  //   Usage Minimum (Keyboard Left Control)
    0x29, 0xE7,  //   Usage Maximum (Keyboard Right GUI)
    0x15, 0x00,  //   Logical Minimum (0)
    0x25, 0x01,  //   Logical Maximum (1)
    0x95, 0x08,  //   Report Count (8)
    0x75, 0x01,  //   Report Size (1)
    0x81, 0x02,  //   Input (Data, Variable, Absolute)
    // Reserved (1 byte)
    0x95, 0x01,  //   Report Count (1)
    0x75, 0x08,  //   Report Size (8)
    0x81, 0x03,  //   Input (Constant)
    // Keycodes (6 bytes)
    0x05, 0x07,        //   Usage Page (Keyboard/Keypad)
    0x19, 0x00,        //   Usage Minimum (0)
    0x29, 0xFF,        //   Usage Maximum (255)
    0x15, 0x00,        //   Logical Minimum (0)
    0x26, 0xFF, 0x00,  //   Logical Maximum (255)
    0x95, 0x06,        //   Report Count (6)
    0x75, 0x08,        //   Report Size (8)
    0x81, 0x00,        //   Input (Data, Array, Absolute)

    // Status LEDs (5 bits)
    0x05, 0x08,  //   Usage Page (LED)
    0x19, 0x01,  //   Usage Minimum (Num Lock)
    0x29, 0x05,  //   Usage Maximum (Kana)
    0x95, 0x05,  //   Report Count (5)
    0x75, 0x01,  //   Report Size (1)
    0x91, 0x02,  //   Output (Data, Variable, Absolute)
    // LED padding (3 bits)
    0x95, 0x01,  //   Report Count (1)
    0x75, 0x03,  //   Report Size (3)
    0x91, 0x03,  //   Output (Constant)
    0xC0         // End Collection
};

#if defined(MOUSE_ENABLE) || defined(EXTRAKEY_ENABLE)
const PROGMEM uchar mouse_extra_hid_report[] = {
#    ifdef MOUSE_ENABLE
    // Mouse report descriptor
    0x05, 0x01,             // Usage Page (Generic Desktop)
    0x09, 0x02,             // Usage (Mouse)
    0xA1, 0x01,             // Collection (Application)
    0x85, REPORT_ID_MOUSE,  //   Report ID
    0x09, 0x01,             //   Usage (Pointer)
    0xA1, 0x00,             //   Collection (Physical)
    // Buttons (5 bits)
    0x05, 0x09,  //     Usage Page (Button)
    0x19, 0x01,  //     Usage Minimum (Button 1)
    0x29, 0x05,  //     Usage Maximum (Button 5)
    0x15, 0x00,  //     Logical Minimum (0)
    0x25, 0x01,  //     Logical Maximum (1)
    0x95, 0x05,  //     Report Count (5)
    0x75, 0x01,  //     Report Size (1)
    0x81, 0x02,  //     Input (Data, Variable, Absolute)
    // Button padding (3 bits)
    0x95, 0x01,  //     Report Count (1)
    0x75, 0x03,  //     Report Size (3)
    0x81, 0x03,  //     Input (Constant)

    // X/Y position (2 bytes)
    0x05, 0x01,  //     Usage Page (Generic Desktop)
    0x09, 0x30,  //     Usage (X)
    0x09, 0x31,  //     Usage (Y)
    0x15, 0x81,  //     Logical Minimum (-127)
    0x25, 0x7F,  //     Logical Maximum (127)
    0x95, 0x02,  //     Report Count (2)
    0x75, 0x08,  //     Report Size (8)
    0x81, 0x06,  //     Input (Data, Variable, Relative)

    // Vertical wheel (1 byte)
    0x09, 0x38,  //     Usage (Wheel)
    0x15, 0x81,  //     Logical Minimum (-127)
    0x25, 0x7F,  //     Logical Maximum (127)
    0x95, 0x01,  //     Report Count (1)
    0x75, 0x08,  //     Report Size (8)
    0x81, 0x06,  //     Input (Data, Variable, Relative)
    // Horizontal wheel (1 byte)
    0x05, 0x0C,        //     Usage Page (Consumer)
    0x0A, 0x38, 0x02,  //     Usage (AC Pan)
    0x15, 0x81,        //     Logical Minimum (-127)
    0x25, 0x7F,        //     Logical Maximum (127)
    0x95, 0x01,        //     Report Count (1)
    0x75, 0x08,        //     Report Size (8)
    0x81, 0x06,        //     Input (Data, Variable, Relative)
    0xC0,              //   End Collection
    0xC0,              // End Collection
#    endif

#    ifdef EXTRAKEY_ENABLE
    // Extrakeys report descriptor
    0x05, 0x01,              // Usage Page (Generic Desktop)
    0x09, 0x80,              // Usage (System Control)
    0xA1, 0x01,              // Collection (Application)
    0x85, REPORT_ID_SYSTEM,  //   Report ID
    0x19, 0x01,              //   Usage Minimum (Pointer)
    0x2A, 0xB7, 0x00,        //   Usage Maximum (System Display LCD Autoscale)
    0x15, 0x01,              //   Logical Minimum
    0x26, 0xB7, 0x00,        //   Logical Maximum
    0x95, 0x01,              //   Report Count (1)
    0x75, 0x10,              //   Report Size (16)
    0x81, 0x00,              //   Input (Data, Array, Absolute)
    0xC0,                    // End Collection

    0x05, 0x0C,                // Usage Page (Consumer)
    0x09, 0x01,                // Usage (Consumer Control)
    0xA1, 0x01,                // Collection (Application)
    0x85, REPORT_ID_CONSUMER,  //   Report ID
    0x19, 0x01,                //   Usage Minimum (Consumer Control)
    0x2A, 0xA0, 0x02,          //   Usage Maximum (AC Desktop Show All Applications)
    0x15, 0x01,                //   Logical Minimum
    0x26, 0xA0, 0x02,          //   Logical Maximum
    0x95, 0x01,                //   Report Count (1)
    0x75, 0x10,                //   Report Size (16)
    0x81, 0x00,                //   Input (Data, Array, Absolute)
    0xC0                       // End Collection
#    endif
};
#endif

#if defined(RAW_ENABLE)
const PROGMEM uchar raw_hid_report[] = {
    0x06, 0x60, 0xFF,  // Usage Page (Vendor Defined)
    0x09, 0x61,        // Usage (Vendor Defined)
    0xA1, 0x01,        // Collection (Application)
    // Data to host
    0x09, 0x62,             //   Usage (Vendor Defined)
    0x15, 0x00,             //   Logical Minimum (0)
    0x26, 0xFF, 0x00,       //   Logical Maximum (255)
    0x95, RAW_BUFFER_SIZE,  //   Report Count
    0x75, 0x08,             //   Report Size (8)
    0x81, 0x02,             //   Input (Data, Variable, Absolute)
    // Data from host
    0x09, 0x63,             //   Usage (Vendor Defined)
    0x15, 0x00,             //   Logical Minimum (0)
    0x26, 0xFF, 0x00,       //   Logical Maximum (255)
    0x95, RAW_BUFFER_SIZE,  //   Report Count
    0x75, 0x08,             //   Report Size (8)
    0x91, 0x02,             //   Output (Data, Variable, Absolute)
    0xC0,                   // End Collection
};
#endif

#ifndef SERIAL_NUMBER
#    define SERIAL_NUMBER 0
#endif

#ifndef USB_MAX_POWER_CONSUMPTION
#    define USB_MAX_POWER_CONSUMPTION 500
#endif

// TODO: change this to 10ms to match LUFA
#ifndef USB_POLLING_INTERVAL_MS
#    define USB_POLLING_INTERVAL_MS 1
#endif

// clang-format off
const PROGMEM usbStringDescriptor_t usbStringDescriptorZero = {
    .header = {
        .bLength         = USB_STRING_LEN(1),
        .bDescriptorType = USBDESCR_STRING
    },
    .bString             = {0x0409} // US English
};

const PROGMEM usbStringDescriptor_t usbStringDescriptorManufacturer = {
    .header = {
        .bLength         = USB_STRING_LEN(sizeof(STR(MANUFACTURER)) - 1),
        .bDescriptorType = USBDESCR_STRING
    },
    .bString             = LSTR(MANUFACTURER)
};

const PROGMEM usbStringDescriptor_t usbStringDescriptorProduct = {
    .header = {
        .bLength         = USB_STRING_LEN(sizeof(STR(PRODUCT)) - 1),
        .bDescriptorType = USBDESCR_STRING
    },
    .bString             = LSTR(PRODUCT)
};

const PROGMEM usbStringDescriptor_t usbStringDescriptorSerial = {
    .header = {
        .bLength         = USB_STRING_LEN(sizeof(STR(SERIAL_NUMBER)) - 1),
        .bDescriptorType = USBDESCR_STRING
    },
    .bString             = LSTR(SERIAL_NUMBER)
};

#if USB_CFG_DESCR_PROPS_DEVICE
/*
 * Device descriptor
 */
const PROGMEM usbDeviceDescriptor_t usbDeviceDescriptor = {
    .header = {
        .bLength         = sizeof(usbDeviceDescriptor_t),
        .bDescriptorType = USBDESCR_DEVICE
    },
    .bcdUSB              = 0x0110,
    .bDeviceClass        = USB_CFG_DEVICE_CLASS,
    .bDeviceSubClass     = USB_CFG_DEVICE_SUBCLASS,
    .bDeviceProtocol     = 0x00,
    .bMaxPacketSize0     = 8,
    .idVendor            = VENDOR_ID,
    .idProduct           = PRODUCT_ID,
    .bcdDevice           = DEVICE_VER,
    .iManufacturer       = 0x01,
    .iProduct            = 0x02,
    .iSerialNumber       = 0x03,
    .bNumConfigurations  = 1
};
#endif

#if USB_CFG_DESCR_PROPS_CONFIGURATION
/*
 * Configuration descriptors
 */
const PROGMEM usbConfigurationDescriptor_t usbConfigurationDescriptor = {
    .header = {
        .header = {
            .bLength         = sizeof(usbConfigurationDescriptorHeader_t),
            .bDescriptorType = USBDESCR_CONFIG
        },
        .wTotalLength        = sizeof(usbConfigurationDescriptor_t),
#    if defined(MOUSE_ENABLE) || defined(EXTRAKEY_ENABLE) || defined(RAW_ENABLE)
        .bNumInterfaces      = 2,
#    else
        .bNumInterfaces      = 1,
#    endif
        .bConfigurationValue = 0x01,
        .iConfiguration      = 0x00,
#    if USB_CFG_IS_SELF_POWERED
        .bmAttributes        = (1 << 7) | USBATTR_SELFPOWER,
#    else
        .bmAttributes        = (1 << 7),
#    endif
        .bMaxPower           = USB_MAX_POWER_CONSUMPTION / 2
    },

    /*
     * Keyboard
     */
    .keyboardInterface = {
        .header = {
            .bLength         = sizeof(usbInterfaceDescriptor_t),
            .bDescriptorType = USBDESCR_INTERFACE
        },
        .bInterfaceNumber    = 0,
        .bAlternateSetting   = 0x00,
        .bNumEndpoints       = USB_CFG_HAVE_INTRIN_ENDPOINT,
        .bInterfaceClass     = USB_CFG_INTERFACE_CLASS,
        .bInterfaceSubClass  = USB_CFG_INTERFACE_SUBCLASS,
        .bInterfaceProtocol  = USB_CFG_INTERFACE_PROTOCOL,
        .iInterface          = 0x00
    },
    .keyboardHID = {
        .header = {
            .bLength         = sizeof(usbHIDDescriptor_t),
            .bDescriptorType = USBDESCR_HID
        },
        .bcdHID              = 0x0101,
        .bCountryCode        = 0x00,
        .bNumDescriptors     = 1,
        .bDescriptorType     = USBDESCR_HID_REPORT,
        .wDescriptorLength   = sizeof(keyboard_hid_report)
    },
#    ifdef USB_CFG_HAVE_INTRIN_ENDPOINT
    .keyboardINEndpoint = {
        .header = {
            .bLength         = sizeof(usbEndpointDescriptor_t),
            .bDescriptorType = USBDESCR_ENDPOINT
        },
        .bEndpointAddress    = (USBRQ_DIR_DEVICE_TO_HOST | 1),
        .bmAttributes        = 0x03,
        .wMaxPacketSize      = 8,
        .bInterval           = USB_POLLING_INTERVAL_MS
    },
#    endif

#    if defined(MOUSE_ENABLE) || defined(EXTRAKEY_ENABLE)
    /*
     * Mouse/Extrakeys
     */
    .mouseExtraInterface = {
        .header = {
            .bLength         = sizeof(usbInterfaceDescriptor_t),
            .bDescriptorType = USBDESCR_INTERFACE
        },
        .bInterfaceNumber    = 1,
        .bAlternateSetting   = 0x00,
        .bNumEndpoints       = USB_CFG_HAVE_INTRIN_ENDPOINT3,
        .bInterfaceClass     = 0x03,
        .bInterfaceSubClass  = 0x00,
        .bInterfaceProtocol  = 0x00,
        .iInterface          = 0x00
    },
    .mouseExtraHID = {
        .header = {
            .bLength         = sizeof(usbHIDDescriptor_t),
            .bDescriptorType = USBDESCR_HID
        },
        .bcdHID              = 0x0101,
        .bCountryCode        = 0x00,
        .bNumDescriptors     = 1,
        .bDescriptorType     = USBDESCR_HID_REPORT,
        .wDescriptorLength   = sizeof(mouse_extra_hid_report)
    },
#        if USB_CFG_HAVE_INTRIN_ENDPOINT3
    .mouseExtraINEndpoint = {
        .header = {
            .bLength         = sizeof(usbEndpointDescriptor_t),
            .bDescriptorType = USBDESCR_ENDPOINT
        },
        .bEndpointAddress    = (USBRQ_DIR_DEVICE_TO_HOST | USB_CFG_EP3_NUMBER),
        .bmAttributes        = 0x03,
        .wMaxPacketSize      = 8,
        .bInterval           = USB_POLLING_INTERVAL_MS
    }
#        endif
#    elif defined(RAW_ENABLE)
    .rawInterface = {
        .header = {
            .bLength         = sizeof(usbInterfaceDescriptor_t),
            .bDescriptorType = USBDESCR_INTERFACE
        },
        .bInterfaceNumber    = 1,
        .bAlternateSetting   = 0x00,
        .bNumEndpoints       = 2,
        .bInterfaceClass     = 0x03,
        .bInterfaceSubClass  = 0x00,
        .bInterfaceProtocol  = 0x00,
        .iInterface          = 0x00
    },
    .rawHID = {
        .header = {
            .bLength         = sizeof(usbHIDDescriptor_t),
            .bDescriptorType = USBDESCR_HID
        },
        .bcdHID              = 0x0101,
        .bCountryCode        = 0x00,
        .bNumDescriptors     = 2,
        .bDescriptorType     = USBDESCR_HID_REPORT,
        .wDescriptorLength   = sizeof(raw_hid_report)
    },
#        if USB_CFG_HAVE_INTRIN_ENDPOINT3
    .rawINEndpoint = {
        .header = {
            .bLength         = sizeof(usbEndpointDescriptor_t),
            .bDescriptorType = USBDESCR_ENDPOINT
        },
        .bEndpointAddress    = (USBRQ_DIR_DEVICE_TO_HOST | USB_CFG_EP3_NUMBER),
        .bmAttributes        = 0x03,
        .wMaxPacketSize      = RAW_EPSIZE,
        .bInterval           = USB_POLLING_INTERVAL_MS
    },
    .rawOUTEndpoint = {
        .header = {
            .bLength         = sizeof(usbEndpointDescriptor_t),
            .bDescriptorType = USBDESCR_ENDPOINT
        },
        .bEndpointAddress    = (USBRQ_DIR_HOST_TO_DEVICE | USB_CFG_EP3_NUMBER),
        .bmAttributes        = 0x03,
        .wMaxPacketSize      = RAW_EPSIZE,
        .bInterval           = USB_POLLING_INTERVAL_MS
    }
#        endif
#    endif
};
#endif

// clang-format on

USB_PUBLIC usbMsgLen_t usbFunctionDescriptor(struct usbRequest *rq) {
    usbMsgLen_t len = 0;

    /*
        debug("usbFunctionDescriptor: ");
        debug_hex(rq->bmRequestType); debug(" ");
        debug_hex(rq->bRequest); debug(" ");
        debug_hex16(rq->wValue.word); debug(" ");
        debug_hex16(rq->wIndex.word); debug(" ");
        debug_hex16(rq->wLength.word); debug("\n");
    */
    switch (rq->wValue.bytes[1]) {
#if USB_CFG_DESCR_PROPS_DEVICE
        case USBDESCR_DEVICE:
            usbMsgPtr = (unsigned char *)&usbDeviceDescriptor;
            len       = sizeof(usbDeviceDescriptor_t);
            break;
#endif
#if USB_CFG_DESCR_PROPS_CONFIGURATION
        case USBDESCR_CONFIG:
            usbMsgPtr = (unsigned char *)&usbConfigurationDescriptor;
            len       = sizeof(usbConfigurationDescriptor_t);
            break;
#endif
        case USBDESCR_STRING:
            switch (rq->wValue.bytes[0]) {
                case 0:
                    usbMsgPtr = (unsigned char *)&usbStringDescriptorZero;
                    len       = usbStringDescriptorZero.header.bLength;
                    break;
                case 1:  // iManufacturer
                    usbMsgPtr = (unsigned char *)&usbStringDescriptorManufacturer;
                    len       = usbStringDescriptorManufacturer.header.bLength;
                    break;
                case 2:  // iProduct
                    usbMsgPtr = (unsigned char *)&usbStringDescriptorProduct;
                    len       = usbStringDescriptorProduct.header.bLength;
                    break;
                case 3:  // iSerialNumber
                    usbMsgPtr = (unsigned char *)&usbStringDescriptorSerial;
                    len       = usbStringDescriptorSerial.header.bLength;
                    break;
            }
            break;
        case USBDESCR_HID:
            switch (rq->wValue.bytes[0]) {
                case 0:
                    usbMsgPtr = (unsigned char *)&usbConfigurationDescriptor.keyboardHID;
                    len       = sizeof(usbHIDDescriptor_t);
                    break;
#if defined(MOUSE_ENABLE) || defined(EXTRAKEY_ENABLE)
                case 1:
                    usbMsgPtr = (unsigned char *)&usbConfigurationDescriptor.mouseExtraHID;
                    len       = sizeof(usbHIDDescriptor_t);
                    break;
#elif defined(RAW_ENABLE)
                case 1:
                    usbMsgPtr = (unsigned char *)&usbConfigurationDescriptor.rawHID;
                    len       = sizeof(usbHIDDescriptor_t);
                    break;
#endif
            }
            break;
        case USBDESCR_HID_REPORT:
            /* interface index */
            switch (rq->wIndex.word) {
                case 0:
                    usbMsgPtr = (unsigned char *)keyboard_hid_report;
                    len       = sizeof(keyboard_hid_report);
                    break;
#if defined(MOUSE_ENABLE) || defined(EXTRAKEY_ENABLE)
                case 1:
                    usbMsgPtr = (unsigned char *)mouse_extra_hid_report;
                    len       = sizeof(mouse_extra_hid_report);
                    break;
#elif defined(RAW_ENABLE)
                case 1:
                    usbMsgPtr = (unsigned char *)raw_hid_report;
                    len       = sizeof(raw_hid_report);
                    break;
#endif
            }
            break;
    }
    // debug("desc len: "); debug_hex(len); debug("\n");
    return len;
}