summaryrefslogtreecommitdiffstats
path: root/drivers/input/mouse/alps.c
blob: 42a9f7f6f8cb2a9b31e65404959dfbb1305be942 (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
/*
 * ALPS touchpad PS/2 mouse driver
 *
 * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
 * Copyright (c) 2003 Peter Osterlund <petero2@telia.com>
 * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
 *
 * ALPS detection, tap switching and status querying info is taken from
 * tpconfig utility (by C. Scott Ananian and Bruce Kall).
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>

#include "psmouse.h"
#include "alps.h"

#undef DEBUG
#ifdef DEBUG
#define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif

#define ALPS_DUALPOINT	0x01
#define ALPS_WHEEL	0x02
#define ALPS_FW_BK	0x04
#define ALPS_4BTN	0x08
#define ALPS_OLDPROTO	0x10
#define ALPS_PASS	0x20

static struct alps_model_info alps_model_data[] = {
	{ { 0x33, 0x02, 0x0a },	0x88, 0xf8, ALPS_OLDPROTO },		/* UMAX-530T */
	{ { 0x53, 0x02, 0x0a },	0xf8, 0xf8, 0 },
	{ { 0x53, 0x02, 0x14 },	0xf8, 0xf8, 0 },
	{ { 0x63, 0x02, 0x0a },	0xf8, 0xf8, 0 },
	{ { 0x63, 0x02, 0x14 },	0xf8, 0xf8, 0 },
	{ { 0x63, 0x02, 0x28 },	0xf8, 0xf8, 0 },
	{ { 0x63, 0x02, 0x3c },	0x8f, 0x8f, ALPS_WHEEL },		/* Toshiba Satellite S2400-103 */
	{ { 0x63, 0x02, 0x50 },	0xef, 0xef, ALPS_FW_BK },		/* NEC Versa L320 */
	{ { 0x63, 0x02, 0x64 },	0xf8, 0xf8, 0 },
	{ { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS },		/* Dell Latitude D800 */
	{ { 0x73, 0x02, 0x0a },	0xf8, 0xf8, 0 },
	{ { 0x73, 0x02, 0x14 },	0xf8, 0xf8, 0 },
	{ { 0x20, 0x02, 0x0e },	0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
	{ { 0x22, 0x02, 0x0a },	0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
	{ { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
};

/*
 * XXX - this entry is suspicious. First byte has zero lower nibble,
 * which is what a normal mouse would report. Also, the value 0x0e
 * isn't valid per PS/2 spec.
 */

/*
 * ALPS abolute Mode - new format
 * 
 * byte 0:  1    ?    ?    ?    1    ?    ?    ? 
 * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
 * byte 2:  0   x10  x9   x8   x7    ?  fin  ges
 * byte 3:  0   y9   y8   y7    1    M    R    L 
 * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
 * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
 *
 * ?'s can have different meanings on different models,
 * such as wheel rotation, extra buttons, stick buttons
 * on a dualpoint, etc.
 */

static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs)
{
	struct alps_data *priv = psmouse->private;
	unsigned char *packet = psmouse->packet;
	struct input_dev *dev = &psmouse->dev;
	struct input_dev *dev2 = &priv->dev2;
	int x, y, z, ges, fin, left, right, middle;

	input_regs(dev, regs);

	if ((packet[0] & 0xc8) == 0x08) {   /* 3-byte PS/2 packet */
		input_report_key(dev2, BTN_LEFT,   packet[0] & 1);    
		input_report_key(dev2, BTN_RIGHT,  packet[0] & 2);
		input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
		input_report_rel(dev2, REL_X,
			packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
		input_report_rel(dev2, REL_Y,
			packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
		input_sync(dev2);
		return;
	}

	if (priv->i->flags & ALPS_OLDPROTO) {
		left = packet[2] & 0x08;
		right = packet[2] & 0x10;
		middle = 0;
		x = packet[1] | ((packet[0] & 0x07) << 7);
		y = packet[4] | ((packet[3] & 0x07) << 7);
		z = packet[5];
	} else {
		left = packet[3] & 1;
		right = packet[3] & 2;
		middle = packet[3] & 4;
		x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
		y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
		z = packet[5];
	}

	ges = packet[2] & 1;
	fin = packet[2] & 2;

	input_report_key(dev, BTN_LEFT, left);
	input_report_key(dev, BTN_RIGHT, right);
	input_report_key(dev, BTN_MIDDLE, middle);

	if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
		input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
		input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
		input_sync(dev);
		input_sync(dev2);
		return;
	}

	/* Convert hardware tap to a reasonable Z value */
	if (ges && !fin) z = 40;

	/*
	 * A "tap and drag" operation is reported by the hardware as a transition
	 * from (!fin && ges) to (fin && ges). This should be translated to the
	 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
	 */
	if (ges && fin && !priv->prev_fin) {
		input_report_abs(dev, ABS_X, x);
		input_report_abs(dev, ABS_Y, y);
		input_report_abs(dev, ABS_PRESSURE, 0);
		input_report_key(dev, BTN_TOOL_FINGER, 0);
		input_sync(dev);
	}
	priv->prev_fin = fin;

	if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
	if (z < 25) input_report_key(dev, BTN_TOUCH, 0);

	if (z > 0) {
		input_report_abs(dev, ABS_X, x);
		input_report_abs(dev, ABS_Y, y);
	}

	input_report_abs(dev, ABS_PRESSURE, z);
	input_report_key(dev, BTN_TOOL_FINGER, z > 0);


	if (priv->i->flags & ALPS_WHEEL)
		input_report_rel(dev, REL_WHEEL, ((packet[0] >> 4) & 0x07) | ((packet[2] >> 2) & 0x08));

	if (priv->i->flags & ALPS_FW_BK) {
		input_report_key(dev, BTN_FORWARD, packet[0] & 0x10);
		input_report_key(dev, BTN_BACK, packet[2] & 0x04);
	}

	input_sync(dev);
}

static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
{
	struct alps_data *priv = psmouse->private;

	if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
		if (psmouse->pktcnt == 3) {
			alps_process_packet(psmouse, regs);
			return PSMOUSE_FULL_PACKET;
		}
		return PSMOUSE_GOOD_DATA;
	}

	if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
		return PSMOUSE_BAD_DATA;

	/* Bytes 2 - 6 should have 0 in the highest bit */
	if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
	    (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
		return PSMOUSE_BAD_DATA;

	if (psmouse->pktcnt == 6) {
		alps_process_packet(psmouse, regs);
		return PSMOUSE_FULL_PACKET;
	}

	return PSMOUSE_GOOD_DATA;
}

static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
	unsigned char param[4];
	int i;

	/*
	 * First try "E6 report".
	 * ALPS should return 0,0,10 or 0,0,100
	 */
	param[0] = 0;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
		return NULL;

	param[0] = param[1] = param[2] = 0xff;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
		return NULL;

	dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

	if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
		return NULL;

	/*
	 * Now try "E7 report". Allowed responses are in
	 * alps_model_data[].signature
	 */
	param[0] = 0;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
		return NULL;

	param[0] = param[1] = param[2] = 0xff;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
		return NULL;

	dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

	for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);
	*version = (param[0] << 8) | (param[1] << 4) | i;

	for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
		if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature)))
			return alps_model_data + i;

	return NULL;
}

/*
 * For DualPoint devices select the device that should respond to
 * subsequent commands. It looks like glidepad is behind stickpointer,
 * I'd thought it would be other way around...
 */
static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[3];
	int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;

	if (ps2_command(ps2dev, NULL, cmd) ||
	    ps2_command(ps2dev, NULL, cmd) ||
	    ps2_command(ps2dev, NULL, cmd) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
		return -1;

	/* we may get 3 more bytes, just ignore them */
	ps2_command(ps2dev, param, 0x0300);

	return 0;
}

static int alps_absolute_mode(struct psmouse *psmouse)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;

	/* Try ALPS magic knock - 4 disable before enable */
	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
		return -1;

	/*
	 * Switch mouse to poll (remote) mode so motion data will not
	 * get in our way
	 */
	return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
}

static int alps_get_status(struct psmouse *psmouse, char *param)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;

	/* Get status: 0xF5 0xF5 0xF5 0xE9 */
	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
		return -1;

	dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

	return 0;
}

/*
 * Turn touchpad tapping on or off. The sequences are:
 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 * My guess that 0xE9 (GetInfo) is here as a sync point.
 * For models that also have stickpointer (DualPoints) its tapping
 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 * we don't fiddle with it.
 */
static int alps_tap_mode(struct psmouse *psmouse, int enable)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
	unsigned char tap_arg = enable ? 0x0A : 0x00;
	unsigned char param[4];

	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
	    ps2_command(ps2dev, &tap_arg, cmd))
		return -1;

	if (alps_get_status(psmouse, param))
		return -1;

	return 0;
}

static int alps_reconnect(struct psmouse *psmouse)
{
	struct alps_data *priv = psmouse->private;
	unsigned char param[4];
	int version;

	psmouse_reset(psmouse);

	if (!(priv->i = alps_get_model(psmouse, &version)))
		return -1;

	if (priv->i->flags & ALPS_PASS && alps_passthrough_mode(psmouse, 1))
		return -1;

	if (alps_get_status(psmouse, param))
		return -1;

	if (param[0] & 0x04)
		alps_tap_mode(psmouse, 1);

	if (alps_absolute_mode(psmouse)) {
		printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
		return -1;
	}

	if (priv->i->flags == ALPS_PASS && alps_passthrough_mode(psmouse, 0))
		return -1;

	return 0;
}

static void alps_disconnect(struct psmouse *psmouse)
{
	struct alps_data *priv = psmouse->private;
	psmouse_reset(psmouse);
	input_unregister_device(&priv->dev2);
	kfree(priv);
}

int alps_init(struct psmouse *psmouse)
{
	struct alps_data *priv;
	unsigned char param[4];
	int version;

	psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL);
	if (!priv)
		goto init_fail;
	memset(priv, 0, sizeof(struct alps_data));

	if (!(priv->i = alps_get_model(psmouse, &version)))
		goto init_fail;

	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
		goto init_fail;

	if (alps_get_status(psmouse, param)) {
		printk(KERN_ERR "alps.c: touchpad status report request failed\n");
		goto init_fail;
	}

	if (param[0] & 0x04) {
		printk(KERN_INFO "alps.c: Enabling hardware tapping\n");
		if (alps_tap_mode(psmouse, 1))
			printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
	}

	if (alps_absolute_mode(psmouse)) {
		printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
		goto init_fail;
	}

	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
		goto init_fail;

	psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
	psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
	psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
	psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);

	psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
	input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);
	input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0);
	input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);

	if (priv->i->flags & ALPS_WHEEL) {
		psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL);
		psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);
	}

	if (priv->i->flags & ALPS_FW_BK) {
		psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
		psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
	}

	sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys);
	priv->dev2.phys = priv->phys;
	priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
	priv->dev2.id.bustype = BUS_I8042;
	priv->dev2.id.vendor = 0x0002;
	priv->dev2.id.product = PSMOUSE_ALPS;
	priv->dev2.id.version = 0x0000; 
	
	priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
	priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);
	priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);

	input_register_device(&priv->dev2);

	printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys);

	psmouse->protocol_handler = alps_process_byte;
	psmouse->disconnect = alps_disconnect;
	psmouse->reconnect = alps_reconnect;
	psmouse->pktsize = 6;

	return 0;

init_fail:
	kfree(priv);
	return -1;
}

int alps_detect(struct psmouse *psmouse, int set_properties)
{
	int version;
	struct alps_model_info *model; 

	if (!(model = alps_get_model(psmouse, &version)))
		return -1;

	if (set_properties) {
		psmouse->vendor = "ALPS";
		if (model->flags & ALPS_DUALPOINT) 
			psmouse->name = "DualPoint TouchPad";
		else
			psmouse->name = "GlidePoint";
		psmouse->model = version;
	}
	return 0;
}