aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input/keyboard/hil_kbd.c
blob: fed31e0947a170f7a39468f97ec4ab10a3ab3181 (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
/*
 * Generic linux-input device driver for keyboard devices
 *
 * Copyright (c) 2001 Brian S. Julin
 * All rights reserved.
 *
 * 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,
 *    without modification.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL").
 *
 * 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
 *
 * References:
 * HP-HIL Technical Reference Manual.  Hewlett Packard Product No. 45918A
 *
 */

#include <linux/hil.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/completion.h>
#include <linux/slab.h>
#include <linux/pci_ids.h>

#define PREFIX "HIL: "

MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
MODULE_DESCRIPTION("HIL keyboard/mouse driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("serio:ty03pr25id00ex*"); /* HIL keyboard */
MODULE_ALIAS("serio:ty03pr25id0Fex*"); /* HIL mouse */

#define HIL_PACKET_MAX_LENGTH 16

#define HIL_KBD_SET1_UPBIT 0x01
#define HIL_KBD_SET1_SHIFT 1
static unsigned int hil_kbd_set1[HIL_KEYCODES_SET1_TBLSIZE] __read_mostly =
	{ HIL_KEYCODES_SET1 };

#define HIL_KBD_SET2_UPBIT 0x01
#define HIL_KBD_SET2_SHIFT 1
/* Set2 is user defined */

#define HIL_KBD_SET3_UPBIT 0x80
#define HIL_KBD_SET3_SHIFT 0
static unsigned int hil_kbd_set3[HIL_KEYCODES_SET3_TBLSIZE] __read_mostly =
	{ HIL_KEYCODES_SET3 };

static const char hil_language[][16] = { HIL_LOCALE_MAP };

struct hil_dev {
	struct input_dev *dev;
	struct serio *serio;

	/* Input buffer and index for packets from HIL bus. */
	hil_packet data[HIL_PACKET_MAX_LENGTH];
	int idx4; /* four counts per packet */

	/* Raw device info records from HIL bus, see hil.h for fields. */
	char	idd[HIL_PACKET_MAX_LENGTH];	/* DID byte and IDD record */
	char	rsc[HIL_PACKET_MAX_LENGTH];	/* RSC record */
	char	exd[HIL_PACKET_MAX_LENGTH];	/* EXD record */
	char	rnm[HIL_PACKET_MAX_LENGTH + 1];	/* RNM record + NULL term. */

	struct completion cmd_done;

	bool is_pointer;
	/* Extra device details needed for pointing devices. */
	unsigned int nbtn, naxes;
	unsigned int btnmap[7];
};

static bool hil_dev_is_command_response(hil_packet p)
{
	if ((p & ~HIL_CMDCT_POL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
		return false;

	if ((p & ~HIL_CMDCT_RPL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))
		return false;

	return true;
}

static void hil_dev_handle_command_response(struct hil_dev *dev)
{
	hil_packet p;
	char *buf;
	int i, idx;

	idx = dev->idx4 / 4;
	p = dev->data[idx - 1];

	switch (p & HIL_PKT_DATA_MASK) {
	case HIL_CMD_IDD:
		buf = dev->idd;
		break;

	case HIL_CMD_RSC:
		buf = dev->rsc;
		break;

	case HIL_CMD_EXD:
		buf = dev->exd;
		break;

	case HIL_CMD_RNM:
		dev->rnm[HIL_PACKET_MAX_LENGTH] = 0;
		buf = dev->rnm;
		break;

	default:
		/* These occur when device isn't present */
		if (p != (HIL_ERR_INT | HIL_PKT_CMD)) {
			/* Anything else we'd like to know about. */
			printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);
		}
		goto out;
	}

	for (i = 0; i < idx; i++)
		buf[i] = dev->data[i] & HIL_PKT_DATA_MASK;
	for (; i < HIL_PACKET_MAX_LENGTH; i++)
		buf[i] = 0;
 out:
	complete(&dev->cmd_done);
}

static void hil_dev_handle_kbd_events(struct hil_dev *kbd)
{
	struct input_dev *dev = kbd->dev;
	int idx = kbd->idx4 / 4;
	int i;

	switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) {
	case HIL_POL_CHARTYPE_NONE:
		return;

	case HIL_POL_CHARTYPE_ASCII:
		for (i = 1; i < idx - 1; i++)
			input_report_key(dev, kbd->data[i] & 0x7f, 1);
		break;

	case HIL_POL_CHARTYPE_RSVD1:
	case HIL_POL_CHARTYPE_RSVD2:
	case HIL_POL_CHARTYPE_BINARY:
		for (i = 1; i < idx - 1; i++)
			input_report_key(dev, kbd->data[i], 1);
		break;

	case HIL_POL_CHARTYPE_SET1:
		for (i = 1; i < idx - 1; i++) {
			unsigned int key = kbd->data[i];
			int up = key & HIL_KBD_SET1_UPBIT;

			key &= (~HIL_KBD_SET1_UPBIT & 0xff);
			key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT];
			input_report_key(dev, key, !up);
		}
		break;

	case HIL_POL_CHARTYPE_SET2:
		for (i = 1; i < idx - 1; i++) {
			unsigned int key = kbd->data[i];
			int up = key & HIL_KBD_SET2_UPBIT;

			key &= (~HIL_KBD_SET1_UPBIT & 0xff);
			key = key >> HIL_KBD_SET2_SHIFT;
			input_report_key(dev, key, !up);
		}
		break;

	case HIL_POL_CHARTYPE_SET3:
		for (i = 1; i < idx - 1; i++) {
			unsigned int key = kbd->data[i];
			int up = key & HIL_KBD_SET3_UPBIT;

			key &= (~HIL_KBD_SET1_UPBIT & 0xff);
			key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT];
			input_report_key(dev, key, !up);
		}
		break;
	}

	input_sync(dev);
}

static void hil_dev_handle_ptr_events(struct hil_dev *ptr)
{
	struct input_dev *dev = ptr->dev;
	int idx = ptr->idx4 / 4;
	hil_packet p = ptr->data[idx - 1];
	int i, cnt, laxis;
	bool absdev, ax16;

	if ((p & HIL_CMDCT_POL) != idx - 1) {
		printk(KERN_WARNING PREFIX
			"Malformed poll packet %x (idx = %i)\n", p, idx);
		return;
	}

	i = (p & HIL_POL_AXIS_ALT) ? 3 : 0;
	laxis = (p & HIL_POL_NUM_AXES_MASK) + i;

	ax16 = ptr->idd[1] & HIL_IDD_HEADER_16BIT; /* 8 or 16bit resolution */
	absdev = ptr->idd[1] & HIL_IDD_HEADER_ABS;

	for (cnt = 1; i < laxis; i++) {
		unsigned int lo, hi, val;

		lo = ptr->data[cnt++] & HIL_PKT_DATA_MASK;
		hi = ax16 ? (ptr->data[cnt++] & HIL_PKT_DATA_MASK) : 0;

		if (absdev) {
			val = lo + (hi << 8);
#ifdef TABLET_AUTOADJUST
			if (val < input_abs_get_min(dev, ABS_X + i))
				input_abs_set_min(dev, ABS_X + i, val);
			if (val > input_abs_get_max(dev, ABS_X + i))
				input_abs_set_max(dev, ABS_X + i, val);
#endif
			if (i % 3)
				val = input_abs_get_max(dev, ABS_X + i) - val;
			input_report_abs(dev, ABS_X + i, val);
		} else {
			val = (int) (((int8_t) lo) | ((int8_t) hi << 8));
			if (i % 3)
				val *= -1;
			input_report_rel(dev, REL_X + i, val);
		}
	}

	while (cnt < idx - 1) {
		unsigned int btn = ptr->data[cnt++];
		int up = btn & 1;

		btn &= 0xfe;
		if (btn == 0x8e)
			continue; /* TODO: proximity == touch? */
		if (btn > 0x8c || btn < 0x80)
			continue;
		btn = (btn - 0x80) >> 1;
		btn = ptr->btnmap[btn];
		input_report_key(dev, btn, !up);
	}

	input_sync(dev);
}

static void hil_dev_process_err(struct hil_dev *dev)
{
	printk(KERN_WARNING PREFIX "errored HIL packet\n");
	dev->idx4 = 0;
	complete(&dev->cmd_done); /* just in case somebody is waiting */
}

static irqreturn_t hil_dev_interrupt(struct serio *serio,
				unsigned char data, unsigned int flags)
{
	struct hil_dev *dev;
	hil_packet packet;
	int idx;

	dev = serio_get_drvdata(serio);
	BUG_ON(dev == NULL);

	if (dev->idx4 >= HIL_PACKET_MAX_LENGTH * sizeof(hil_packet)) {
		hil_dev_process_err(dev);
		goto out;
	}

	idx = dev->idx4 / 4;
	if (!(dev->idx4 % 4))
		dev->data[idx] = 0;
	packet = dev->data[idx];
	packet |= ((hil_packet)data) << ((3 - (dev->idx4 % 4)) * 8);
	dev->data[idx] = packet;

	/* Records of N 4-byte hil_packets must terminate with a command. */
	if ((++dev->idx4 % 4) == 0) {
		if ((packet & 0xffff0000) != HIL_ERR_INT) {
			hil_dev_process_err(dev);
		} else if (packet & HIL_PKT_CMD) {
			if (hil_dev_is_command_response(packet))
				hil_dev_handle_command_response(dev);
			else if (dev->is_pointer)
				hil_dev_handle_ptr_events(dev);
			else
				hil_dev_handle_kbd_events(dev);
			dev->idx4 = 0;
		}
	}
 out:
	return IRQ_HANDLED;
}

static void hil_dev_disconnect(struct serio *serio)
{
	struct hil_dev *dev = serio_get_drvdata(serio);

	BUG_ON(dev == NULL);

	serio_close(serio);
	input_unregister_device(dev->dev);
	serio_set_drvdata(serio, NULL);
	kfree(dev);
}

static void hil_dev_keyboard_setup(struct hil_dev *kbd)
{
	struct input_dev *input_dev = kbd->dev;
	uint8_t did = kbd->idd[0];
	int i;

	input_dev->evbit[0]	= BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
	input_dev->ledbit[0]	= BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
				  BIT_MASK(LED_SCROLLL);

	for (i = 0; i < 128; i++) {
		__set_bit(hil_kbd_set1[i], input_dev->keybit);
		__set_bit(hil_kbd_set3[i], input_dev->keybit);
	}
	__clear_bit(KEY_RESERVED, input_dev->keybit);

	input_dev->keycodemax	= HIL_KEYCODES_SET1_TBLSIZE;
	input_dev->keycodesize	= sizeof(hil_kbd_set1[0]);
	input_dev->keycode	= hil_kbd_set1;

	input_dev->name	= strlen(kbd->rnm) ? kbd->rnm : "HIL keyboard";
	input_dev->phys	= "hpkbd/input0";

	printk(KERN_INFO PREFIX "HIL keyboard found (did = 0x%02x, lang = %s)\n",
		did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]);
}

static void hil_dev_pointer_setup(struct hil_dev *ptr)
{
	struct input_dev *input_dev = ptr->dev;
	uint8_t did = ptr->idd[0];
	uint8_t *idd = ptr->idd + 1;
	unsigned int naxsets = HIL_IDD_NUM_AXSETS(*idd);
	unsigned int i, btntype;
	const char *txt;

	ptr->naxes = HIL_IDD_NUM_AXES_PER_SET(*idd);

	switch (did & HIL_IDD_DID_TYPE_MASK) {
	case HIL_IDD_DID_TYPE_REL:
		input_dev->evbit[0] = BIT_MASK(EV_REL);

		for (i = 0; i < ptr->naxes; i++)
			__set_bit(REL_X + i, input_dev->relbit);

		for (i = 3; naxsets > 1 && i < ptr->naxes + 3; i++)
			__set_bit(REL_X + i, input_dev->relbit);

		txt = "relative";
		break;

	case HIL_IDD_DID_TYPE_ABS:
		input_dev->evbit[0] = BIT_MASK(EV_ABS);

		for (i = 0; i < ptr->naxes; i++)
			input_set_abs_params(input_dev, ABS_X + i,
					0, HIL_IDD_AXIS_MAX(idd, i), 0, 0);

		for (i = 3; naxsets > 1 && i < ptr->naxes + 3; i++)
			input_set_abs_params(input_dev, ABS_X + i,
					0, HIL_IDD_AXIS_MAX(idd, i - 3), 0, 0);

#ifdef TABLET_AUTOADJUST
		for (i = 0; i < ABS_MAX; i++) {
			int diff = input_abs_get_max(input_dev, ABS_X + i) / 10;
			input_abs_set_min(input_dev, ABS_X + i,
				input_abs_get_min(input_dev, ABS_X + i) + diff);
			input_abs_set_max(input_dev, ABS_X + i,
				input_abs_get_max(input_dev, ABS_X + i) - diff);
		}
#endif

		txt = "absolute";
		break;

	default:
		BUG();
	}

	ptr->nbtn = HIL_IDD_NUM_BUTTONS(idd);
	if (ptr->nbtn)
		input_dev->evbit[0] |= BIT_MASK(EV_KEY);

	btntype = BTN_MISC;
	if ((did & HIL_IDD_DID_ABS_TABLET_MASK) == HIL_IDD_DID_ABS_TABLET)
#ifdef TABLET_SIMULATES_MOUSE
		btntype = BTN_TOUCH;
#else
		btntype = BTN_DIGI;
#endif
	if ((did & HIL_IDD_DID_ABS_TSCREEN_MASK) == HIL_IDD_DID_ABS_TSCREEN)
		btntype = BTN_TOUCH;

	if ((did & HIL_IDD_DID_REL_MOUSE_MASK) == HIL_IDD_DID_REL_MOUSE)
		btntype = BTN_MOUSE;

	for (i = 0; i < ptr->nbtn; i++) {
		__set_bit(btntype | i, input_dev->keybit);
		ptr->btnmap[i] = btntype | i;
	}

	if (btntype == BTN_MOUSE) {
		/* Swap buttons 2 and 3 */
		ptr->btnmap[1] = BTN_MIDDLE;
		ptr->btnmap[2] = BTN_RIGHT;
	}

	input_dev->name = strlen(ptr->rnm) ? ptr->rnm : "HIL pointer device";

	printk(KERN_INFO PREFIX
		"HIL pointer device found (did: 0x%02x, axis: %s)\n",
		did, txt);
	printk(KERN_INFO PREFIX
		"HIL pointer has %i buttons and %i sets of %i axes\n",
		ptr->nbtn, naxsets, ptr->naxes);
}

static int hil_dev_connect(struct serio *serio, struct serio_driver *drv)
{
	struct hil_dev *dev;
	struct input_dev *input_dev;
	uint8_t did, *idd;
	int error;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!dev || !input_dev) {
		error = -ENOMEM;
		goto bail0;
	}

	dev->serio = serio;
	dev->dev = input_dev;

	error = serio_open(serio, drv);
	if (error)
		goto bail0;

	serio_set_drvdata(serio, dev);

	/* Get device info.  MLC driver supplies devid/status/etc. */
	init_completion(&dev->cmd_done);
	serio_write(serio, 0);
	serio_write(serio, 0);
	serio_write(serio, HIL_PKT_CMD >> 8);
	serio_write(serio, HIL_CMD_IDD);
	error = wait_for_completion_killable(&dev->cmd_done);
	if (error)
		goto bail1;

	init_completion(&dev->cmd_done);
	serio_write(serio, 0);
	serio_write(serio, 0);
	serio_write(serio, HIL_PKT_CMD >> 8);
	serio_write(serio, HIL_CMD_RSC);
	error = wait_for_completion_killable(&dev->cmd_done);
	if (error)
		goto bail1;

	init_completion(&dev->cmd_done);
	serio_write(serio, 0);
	serio_write(serio, 0);
	serio_write(serio, HIL_PKT_CMD >> 8);
	serio_write(serio, HIL_CMD_RNM);
	error = wait_for_completion_killable(&dev->cmd_done);
	if (error)
		goto bail1;

	init_completion(&dev->cmd_done);
	serio_write(serio, 0);
	serio_write(serio, 0);
	serio_write(serio, HIL_PKT_CMD >> 8);
	serio_write(serio, HIL_CMD_EXD);
	error = wait_for_completion_killable(&dev->cmd_done);
	if (error)
		goto bail1;

	did = dev->idd[0];
	idd = dev->idd + 1;

	switch (did & HIL_IDD_DID_TYPE_MASK) {
	case HIL_IDD_DID_TYPE_KB_INTEGRAL:
	case HIL_IDD_DID_TYPE_KB_ITF:
	case HIL_IDD_DID_TYPE_KB_RSVD:
	case HIL_IDD_DID_TYPE_CHAR:
		if (HIL_IDD_NUM_BUTTONS(idd) ||
		    HIL_IDD_NUM_AXES_PER_SET(*idd)) {
			printk(KERN_INFO PREFIX
				"combo devices are not supported.\n");
			goto bail1;
		}

		dev->is_pointer = false;
		hil_dev_keyboard_setup(dev);
		break;

	case HIL_IDD_DID_TYPE_REL:
	case HIL_IDD_DID_TYPE_ABS:
		dev->is_pointer = true;
		hil_dev_pointer_setup(dev);
		break;

	default:
		goto bail1;
	}

	input_dev->id.bustype	= BUS_HIL;
	input_dev->id.vendor	= PCI_VENDOR_ID_HP;
	input_dev->id.product	= 0x0001; /* TODO: get from kbd->rsc */
	input_dev->id.version	= 0x0100; /* TODO: get from kbd->rsc */
	input_dev->dev.parent	= &serio->dev;

	if (!dev->is_pointer) {
		serio_write(serio, 0);
		serio_write(serio, 0);
		serio_write(serio, HIL_PKT_CMD >> 8);
		/* Enable Keyswitch Autorepeat 1 */
		serio_write(serio, HIL_CMD_EK1);
		/* No need to wait for completion */
	}

	error = input_register_device(input_dev);
	if (error)
		goto bail1;

	return 0;

 bail1:
	serio_close(serio);
	serio_set_drvdata(serio, NULL);
 bail0:
	input_free_device(input_dev);
	kfree(dev);
	return error;
}

static struct serio_device_id hil_dev_ids[] = {
	{
		.type = SERIO_HIL_MLC,
		.proto = SERIO_HIL,
		.id = SERIO_ANY,
		.extra = SERIO_ANY,
	},
	{ 0 }
};

MODULE_DEVICE_TABLE(serio, hil_dev_ids);

static struct serio_driver hil_serio_drv = {
	.driver		= {
		.name	= "hil_dev",
	},
	.description	= "HP HIL keyboard/mouse/tablet driver",
	.id_table	= hil_dev_ids,
	.connect	= hil_dev_connect,
	.disconnect	= hil_dev_disconnect,
	.interrupt	= hil_dev_interrupt
};

static int __init hil_dev_init(void)
{
	return serio_register_driver(&hil_serio_drv);
}

static void __exit hil_dev_exit(void)
{
	serio_unregister_driver(&hil_serio_drv);
}

module_init(hil_dev_init);
module_exit(hil_dev_exit);