summaryrefslogtreecommitdiff
path: root/payloads/libpayload/drivers/usb/usbhid.c
blob: 68130f80b025afd2694cf6e0613e4f0ec61c8236 (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
/*
 * This file is part of the libpayload project.
 *
 * Copyright (C) 2008-2010 coresystems GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

// #define USB_DEBUG

#include <keycodes.h>
#include <usb/usb.h>

enum { hid_subclass_none = 0, hid_subclass_boot = 1 };
typedef enum { hid_proto_boot = 0, hid_proto_report = 1 } hid_proto;
enum { hid_boot_proto_none = 0, hid_boot_proto_keyboard =
		1, hid_boot_proto_mouse = 2
};
static const char *boot_protos[3] = { "(none)", "keyboard", "mouse" };
enum { GET_REPORT = 0x1, GET_IDLE = 0x2, GET_PROTOCOL = 0x3, SET_REPORT =
		0x9, SET_IDLE = 0xa, SET_PROTOCOL = 0xb
};

typedef union {
	struct {
		u8 modifiers;
		u8 repeats;
		u8 keys[6];
	};
	u8 buffer[8];
} usb_hid_keyboard_event_t;

typedef struct {
	void* queue;
	hid_descriptor_t *descriptor;

	usb_hid_keyboard_event_t previous;
	int lastkeypress;
	int repeat_delay;
} usbhid_inst_t;

#define HID_INST(dev) ((usbhid_inst_t*)(dev)->data)

static void
usb_hid_destroy (usbdev_t *dev)
{
	if (HID_INST(dev)->queue) {
		int i;
		for (i = 0; i <= dev->num_endp; i++) {
			if (dev->endpoints[i].endpoint == 0)
				continue;
			if (dev->endpoints[i].type != INTERRUPT)
				continue;
			if (dev->endpoints[i].direction != IN)
				continue;
			break;
		}
		dev->controller->destroy_intr_queue(
				&dev->endpoints[i], HID_INST(dev)->queue);
		HID_INST(dev)->queue = NULL;
	}
	free (dev->data);
}

/* keybuffer is global to all USB keyboards */
static int keycount;
#define KEYBOARD_BUFFER_SIZE 16
static short keybuffer[KEYBOARD_BUFFER_SIZE];

const char *countries[36][2] = {
	{ "not supported", "us" },
	{ "Arabic", "ae" },
	{ "Belgian", "be" },
	{ "Canadian-Bilingual", "ca" },
	{ "Canadian-French", "ca" },
	{ "Czech Republic", "cz" },
	{ "Danish", "dk" },
	{ "Finnish", "fi" },
	{ "French", "fr" },
	{ "German", "de" },
	{ "Greek", "gr" },
	{ "Hebrew", "il" },
	{ "Hungary", "hu" },
	{ "International (ISO)", "iso" },
	{ "Italian", "it" },
	{ "Japan (Katakana)", "jp" },
	{ "Korean", "us" },
	{ "Latin American", "us" },
	{ "Netherlands/Dutch", "nl" },
	{ "Norwegian", "no" },
	{ "Persian (Farsi)", "ir" },
	{ "Poland", "pl" },
	{ "Portuguese", "pt" },
	{ "Russia", "ru" },
	{ "Slovakia", "sl" },
	{ "Spanish", "es" },
	{ "Swedish", "se" },
	{ "Swiss/French", "ch" },
	{ "Swiss/German", "ch" },
	{ "Switzerland", "ch" },
	{ "Taiwan", "tw" },
	{ "Turkish-Q", "tr" },
	{ "UK", "uk" },
	{ "US", "us" },
	{ "Yugoslavia", "yu" },
	{ "Turkish-F", "tr" },
	/* 36 - 255: Reserved */
};



struct layout_maps {
	const char *country;
	const short map[4][0x80];
};

static const struct layout_maps *map;

static const struct layout_maps keyboard_layouts[] = {
// #if IS_ENABLED(CONFIG_LP_PC_KEYBOARD_LAYOUT_US)
{ .country = "us", .map = {
	{ /* No modifier */
	-1, -1, -1, -1, 'a', 'b', 'c', 'd',
	'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
	/* 0x10 */
	'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
	'u', 'v', 'w', 'x', 'y', 'z', '1', '2',
	/* 0x20 */
	'3', '4', '5', '6', '7', '8', '9', '0',
	'\n', '\e', '\b', '\t', ' ', '-', '=', '[',
	/* 0x30 */
	']', '\\', -1, ';', '\'', '`', ',', '.',
	'/', -1 /* CapsLk */, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6),
	/* 0x40 */
	KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), KEY_F(11), KEY_F(12), KEY_PRINT, -1 /* ScrLk */,
	KEY_BREAK, KEY_IC, KEY_HOME, KEY_PPAGE, KEY_DC, KEY_END, KEY_NPAGE, KEY_RIGHT,
	/* 50 */
	KEY_LEFT, KEY_DOWN, KEY_UP, -1 /*NumLck*/, '/', '*', '-' /* = ? */, '+',
	KEY_ENTER, KEY_END, KEY_DOWN, KEY_NPAGE, KEY_LEFT, -1, KEY_RIGHT, KEY_HOME,
	/* 60 */
	KEY_UP, KEY_PPAGE, -1, KEY_DC, -1 /* < > | */, -1 /* Win Key Right */, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	/* 70 */
	-1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	 },
	{ /* Shift modifier */
	-1, -1, -1, -1, 'A', 'B', 'C', 'D',
	'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
	/* 0x10 */
	'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
	'U', 'V', 'W', 'X', 'Y', 'Z', '!', '@',
	/* 0x20 */
	'#', '$', '%', '^', '&', '*', '(', ')',
	'\n', '\e', '\b', '\t', ' ', '_', '+', '[',
	/* 0x30 */
	']', '\\', -1, ':', '\'', '`', ',', '.',
	'/', -1 /* CapsLk */, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6),
	/* 0x40 */
	KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), KEY_F(11), KEY_F(12), KEY_PRINT, -1 /* ScrLk */,
	KEY_BREAK, KEY_IC, KEY_HOME, KEY_PPAGE, KEY_DC, KEY_END, KEY_NPAGE, KEY_RIGHT,
	/* 50 */
	KEY_LEFT, KEY_DOWN, KEY_UP, -1 /*NumLck*/, '/', '*', '-' /* = ? */, '+',
	KEY_ENTER, KEY_END, KEY_DOWN, KEY_NPAGE, KEY_LEFT, -1, KEY_RIGHT, KEY_HOME,
	/* 60 */
	KEY_UP, KEY_PPAGE, -1, KEY_DC, -1 /* < > | */, -1 /* Win Key Right */, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	/* 70 */
	-1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	 },
	{ /* Alt */
	-1, -1, -1, -1, 'a', 'b', 'c', 'd',
	'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
	/* 0x10 */
	'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
	'u', 'v', 'w', 'x', 'y', 'z', '1', '2',
	/* 0x20 */
	'3', '4', '5', '6', '7', '8', '9', '0',
	'\n', '\e', '\b', '\t', ' ', '-', '=', '[',
	/* 0x30 */
	']', '\\', -1, ';', '\'', '`', ',', '.',
	'/', -1 /* CapsLk */, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6),
	/* 0x40 */
	KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), KEY_F(11), KEY_F(12), KEY_PRINT, -1 /* ScrLk */,
	KEY_BREAK, KEY_IC, KEY_HOME, KEY_PPAGE, KEY_DC, KEY_END, KEY_NPAGE, KEY_RIGHT,
	/* 50 */
	KEY_LEFT, KEY_DOWN, KEY_UP, -1 /*NumLck*/, '/', '*', '-' /* = ? */, '+',
	KEY_ENTER, KEY_END, KEY_DOWN, KEY_NPAGE, KEY_LEFT, -1, KEY_RIGHT, KEY_HOME,
	/* 60 */
	KEY_UP, KEY_PPAGE, -1, KEY_DC, -1 /* < > | */, -1 /* Win Key Right */, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	/* 70 */
	-1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	 },
	{ /* Shift+Alt modifier */
	-1, -1, -1, -1, 'A', 'B', 'C', 'D',
	'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
	/* 0x10 */
	'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
	'U', 'V', 'W', 'X', 'Y', 'Z', '!', '@',
	/* 0x20 */
	'#', '$', '%', '^', '&', '*', '(', ')',
	'\n', '\e', '\b', '\t', ' ', '-', '=', '[',
	/* 0x30 */
	']', '\\', -1, ':', '\'', '`', ',', '.',
	'/', -1 /* CapsLk */, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6),
	/* 0x40 */
	KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), KEY_F(11), KEY_F(12), KEY_PRINT, -1 /* ScrLk */,
	KEY_BREAK, KEY_IC, KEY_HOME, KEY_PPAGE, KEY_DC, KEY_END, KEY_NPAGE, KEY_RIGHT,
	/* 50 */
	KEY_LEFT, KEY_DOWN, KEY_UP, -1 /*NumLck*/, '/', '*', '-' /* = ? */, '+',
	KEY_ENTER, KEY_END, KEY_DOWN, KEY_NPAGE, KEY_LEFT, -1, KEY_RIGHT, KEY_HOME,
	/* 60 */
	KEY_UP, KEY_PPAGE, -1, KEY_DC, -1 /* < > | */, -1 /* Win Key Right */, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	/* 70 */
	-1, -1, -1, -1, -1, -1, -1, -1,
	-1, -1, -1, -1, -1, -1, -1, -1,
	 }
}},
//#endif
};

#define MOD_SHIFT    (1 << 0)
#define MOD_ALT      (1 << 1)
#define MOD_CTRL     (1 << 2)

static void usb_hid_keyboard_queue(int ch) {
	/* ignore key presses if buffer full */
	if (keycount < KEYBOARD_BUFFER_SIZE)
		keybuffer[keycount++] = ch;
}

#define KEYBOARD_REPEAT_MS	30
#define INITIAL_REPEAT_DELAY	10
#define REPEAT_DELAY		 2

static void
usb_hid_process_keyboard_event(usbhid_inst_t *const inst,
		const usb_hid_keyboard_event_t *const current)
{
	const usb_hid_keyboard_event_t *const previous = &inst->previous;

	int i, keypress = 0, modifiers = 0;

	if (current->modifiers & 0x01) /* Left-Ctrl */   modifiers |= MOD_CTRL;
	if (current->modifiers & 0x02) /* Left-Shift */  modifiers |= MOD_SHIFT;
	if (current->modifiers & 0x04) /* Left-Alt */    modifiers |= MOD_ALT;
	if (current->modifiers & 0x08) /* Left-GUI */    ;
	if (current->modifiers & 0x10) /* Right-Ctrl */  modifiers |= MOD_CTRL;
	if (current->modifiers & 0x20) /* Right-Shift */ modifiers |= MOD_SHIFT;
	if (current->modifiers & 0x40) /* Right-AltGr */ modifiers |= MOD_ALT;
	if (current->modifiers & 0x80) /* Right-GUI */   ;

	if ((current->modifiers & 0x05) && ((current->keys[0] == 0x4c) ||
				(current->keys[0]==0x63))) {
		/* vulcan nerve pinch */
		if (reset_handler)
			reset_handler();
	}

	/* Did the event change at all? */
	if (inst->lastkeypress &&
			!memcmp(current, previous, sizeof(*current))) {
		/* No. Then it's a key repeat event. */
		if (inst->repeat_delay) {
			inst->repeat_delay--;
		} else {
			usb_hid_keyboard_queue(inst->lastkeypress);
			inst->repeat_delay = REPEAT_DELAY;
		}

		return;
	}

	inst->lastkeypress = 0;

	for (i=0; i<6; i++) {
		int j;
		int skip = 0;
		// No more keys? skip
		if (current->keys[i] == 0)
			return;

		for (j=0; j<6; j++) {
			if (current->keys[i] == previous->keys[j]) {
				skip = 1;
				break;
			}
		}
		if (skip)
			continue;


		/* Mask off MOD_CTRL */
		keypress = map->map[modifiers & 0x03][current->keys[i]];

		if (modifiers & MOD_CTRL) {
			switch (keypress) {
			case 'a' ... 'z':
				keypress &= 0x1f;
				break;
			default:
				continue;
			}
		}

		if (keypress == -1) {
			/* Debug: Print unknown keys */
			usb_debug ("usbhid: <%x> %x [ %x %x %x %x %x %x ] %d\n",
				current->modifiers, current->repeats,
			current->keys[0], current->keys[1],
			current->keys[2], current->keys[3],
			current->keys[4], current->keys[5], i);

			/* Unknown key? Try next one in the queue */
			continue;
		}

		usb_hid_keyboard_queue(keypress);

		/* Remember for authentic key repeat */
		inst->lastkeypress = keypress;
		inst->repeat_delay = INITIAL_REPEAT_DELAY;
	}
}

static void
usb_hid_poll (usbdev_t *dev)
{
	usb_hid_keyboard_event_t current;
	const u8 *buf;

	while ((buf=dev->controller->poll_intr_queue (HID_INST(dev)->queue))) {
		memcpy(&current.buffer, buf, 8);
		usb_hid_process_keyboard_event(HID_INST(dev), &current);
		HID_INST(dev)->previous = current;
	}
}

static void
usb_hid_set_idle (usbdev_t *dev, interface_descriptor_t *interface, u16 duration)
{
	dev_req_t dr;
	dr.data_dir = host_to_device;
	dr.req_type = class_type;
	dr.req_recp = iface_recp;
	dr.bRequest = SET_IDLE;
	dr.wValue = (duration >> 2) << 8;
	dr.wIndex = interface->bInterfaceNumber;
	dr.wLength = 0;
	dev->controller->control (dev, OUT, sizeof (dev_req_t), &dr, 0, 0);
}

static void
usb_hid_set_protocol (usbdev_t *dev, interface_descriptor_t *interface, hid_proto proto)
{
	dev_req_t dr;
	dr.data_dir = host_to_device;
	dr.req_type = class_type;
	dr.req_recp = iface_recp;
	dr.bRequest = SET_PROTOCOL;
	dr.wValue = proto;
	dr.wIndex = interface->bInterfaceNumber;
	dr.wLength = 0;
	dev->controller->control (dev, OUT, sizeof (dev_req_t), &dr, 0, 0);
}

static struct console_input_driver cons = {
	.havekey = usbhid_havechar,
	.getchar = usbhid_getchar,
	.input_type = CONSOLE_INPUT_TYPE_USB,
};


static int usb_hid_set_layout (const char *country)
{
	/* FIXME should be per keyboard */
	int i;

	for (i=0; i<ARRAY_SIZE(keyboard_layouts); i++) {
		if (strncmp(keyboard_layouts[i].country, country,
					strlen(keyboard_layouts[i].country)))
			continue;

		/* Found, changing keyboard layout */
		map = &keyboard_layouts[i];
		usb_debug("  Keyboard layout '%s'\n", map->country);
		return 0;
	}

	usb_debug("  Keyboard layout '%s' not found, using '%s'\n",
			country, map->country);

	/* Nothing found, not changed */
	return -1;
}

void
usb_hid_init (usbdev_t *dev)
{

	static int installed = 0;
	if (!installed) {
		installed = 1;
		console_add_input_driver (&cons);
	}

	configuration_descriptor_t *cd = (configuration_descriptor_t*)dev->configuration;
	interface_descriptor_t *interface = (interface_descriptor_t*)(((char *) cd) + cd->bLength);

	if (interface->bInterfaceSubClass == hid_subclass_boot) {
		u8 countrycode;
		usb_debug ("  supports boot interface..\n");
		usb_debug ("  it's a %s\n",
			boot_protos[interface->bInterfaceProtocol]);
		switch (interface->bInterfaceProtocol) {
		case hid_boot_proto_keyboard:
			dev->data = xzalloc (sizeof (usbhid_inst_t));
			usb_debug ("  configuring...\n");
			usb_hid_set_protocol(dev, interface, hid_proto_boot);
			usb_hid_set_idle(dev, interface, KEYBOARD_REPEAT_MS);
			usb_debug ("  activating...\n");

			hid_descriptor_t *desc = malloc(sizeof(hid_descriptor_t));
			if (!desc || get_descriptor(dev, gen_bmRequestType(
				device_to_host, standard_type, iface_recp),
				0x21, 0, desc, sizeof(*desc)) != sizeof(*desc)) {
				usb_debug ("get_descriptor(HID) failed\n");
				usb_detach_device (dev->controller, dev->address);
				return;
			}
			HID_INST (dev)->descriptor = desc;
			countrycode = desc->bCountryCode;
			/* 35 countries defined: */
			if (countrycode >= ARRAY_SIZE(countries))
				countrycode = 0;
			usb_debug ("  Keyboard has %s layout (country code %02x)\n",
					countries[countrycode][0], countrycode);

			/* Set keyboard layout accordingly */
			usb_hid_set_layout(countries[countrycode][1]);

			// only add here, because we only support boot-keyboard HID devices
			dev->destroy = usb_hid_destroy;
			dev->poll = usb_hid_poll;
			int i;
			for (i = 1; i < dev->num_endp; i++) {
				if (dev->endpoints[i].type != INTERRUPT)
					continue;
				if (dev->endpoints[i].direction != IN)
					continue;
				break;
			}
			if (i >= dev->num_endp) {
				usb_debug ("Could not find HID endpoint\n");
				usb_detach_device (dev->controller, dev->address);
				return;
			}
			usb_debug ("  found endpoint %x for interrupt-in\n", i);
			/* 20 buffers of 8 bytes, for every 10 msecs */
			HID_INST(dev)->queue = dev->controller->create_intr_queue (&dev->endpoints[i], 8, 20, 10);
			keycount = 0;
			usb_debug ("  configuration done.\n");
			break;
		case hid_boot_proto_mouse:
			usb_debug("NOTICE: USB mice are not supported.\n");
			break;
		}
	}
}

int usbhid_havechar (void)
{
	return (keycount != 0);
}

int usbhid_getchar (void)
{
	short ret;

	if (keycount == 0)
		return 0;
	ret = keybuffer[0];
	memmove(keybuffer, keybuffer + 1, --keycount);

	return (int)ret;
}