2 * ALPS touchpad PS/2 mouse driver
4 * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
5 * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
6 * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
7 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
9 * ALPS detection, tap switching and status querying info is taken from
10 * tpconfig utility (by C. Scott Ananian and Bruce Kall).
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published by
14 * the Free Software Foundation.
17 #include <linux/input.h>
18 #include <linux/serio.h>
19 #include <linux/libps2.h>
26 #define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
28 #define dbg(format, arg...) do {} while (0)
31 #define ALPS_DUALPOINT 0x01
32 #define ALPS_WHEEL 0x02
33 #define ALPS_FW_BK_1 0x04
34 #define ALPS_4BTN 0x08
35 #define ALPS_OLDPROTO 0x10
36 #define ALPS_PASS 0x20
37 #define ALPS_FW_BK_2 0x40
39 static const struct alps_model_info alps_model_data[] = {
40 { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO }, /* UMAX-530T */
41 { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
42 { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
43 { { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 }, /* HP ze1115 */
44 { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
45 { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
46 { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Fujitsu Siemens S6010 */
47 { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
48 { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 }, /* NEC Versa L320 */
49 { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
50 { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS }, /* Dell Latitude D800 */
51 { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
52 { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Ahtec Laptop */
53 { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
54 { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
55 { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
59 * XXX - this entry is suspicious. First byte has zero lower nibble,
60 * which is what a normal mouse would report. Also, the value 0x0e
61 * isn't valid per PS/2 spec.
65 * ALPS abolute Mode - new format
67 * byte 0: 1 ? ? ? 1 ? ? ?
68 * byte 1: 0 x6 x5 x4 x3 x2 x1 x0
69 * byte 2: 0 x10 x9 x8 x7 ? fin ges
70 * byte 3: 0 y9 y8 y7 1 M R L
71 * byte 4: 0 y6 y5 y4 y3 y2 y1 y0
72 * byte 5: 0 z6 z5 z4 z3 z2 z1 z0
74 * ?'s can have different meanings on different models,
75 * such as wheel rotation, extra buttons, stick buttons
76 * on a dualpoint, etc.
79 static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs)
81 struct alps_data *priv = psmouse->private;
82 unsigned char *packet = psmouse->packet;
83 struct input_dev *dev = psmouse->dev;
84 struct input_dev *dev2 = priv->dev2;
85 int x, y, z, ges, fin, left, right, middle;
86 int back = 0, forward = 0;
88 input_regs(dev, regs);
90 if ((packet[0] & 0xc8) == 0x08) { /* 3-byte PS/2 packet */
91 input_report_key(dev2, BTN_LEFT, packet[0] & 1);
92 input_report_key(dev2, BTN_RIGHT, packet[0] & 2);
93 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
94 input_report_rel(dev2, REL_X,
95 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
96 input_report_rel(dev2, REL_Y,
97 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
102 if (priv->i->flags & ALPS_OLDPROTO) {
103 left = packet[2] & 0x10;
104 right = packet[2] & 0x08;
106 x = packet[1] | ((packet[0] & 0x07) << 7);
107 y = packet[4] | ((packet[3] & 0x07) << 7);
110 left = packet[3] & 1;
111 right = packet[3] & 2;
112 middle = packet[3] & 4;
113 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
114 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
118 if (priv->i->flags & ALPS_FW_BK_1) {
119 back = packet[2] & 4;
120 forward = packet[0] & 0x10;
123 if (priv->i->flags & ALPS_FW_BK_2) {
124 back = packet[3] & 4;
125 forward = packet[2] & 4;
126 if ((middle = forward && back))
133 input_report_key(dev, BTN_LEFT, left);
134 input_report_key(dev, BTN_RIGHT, right);
135 input_report_key(dev, BTN_MIDDLE, middle);
137 if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
138 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
139 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
145 /* Convert hardware tap to a reasonable Z value */
146 if (ges && !fin) z = 40;
149 * A "tap and drag" operation is reported by the hardware as a transition
150 * from (!fin && ges) to (fin && ges). This should be translated to the
151 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
153 if (ges && fin && !priv->prev_fin) {
154 input_report_abs(dev, ABS_X, x);
155 input_report_abs(dev, ABS_Y, y);
156 input_report_abs(dev, ABS_PRESSURE, 0);
157 input_report_key(dev, BTN_TOOL_FINGER, 0);
160 priv->prev_fin = fin;
162 if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
163 if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
166 input_report_abs(dev, ABS_X, x);
167 input_report_abs(dev, ABS_Y, y);
170 input_report_abs(dev, ABS_PRESSURE, z);
171 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
173 if (priv->i->flags & ALPS_WHEEL)
174 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
176 if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
177 input_report_key(dev, BTN_FORWARD, forward);
178 input_report_key(dev, BTN_BACK, back);
184 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
186 struct alps_data *priv = psmouse->private;
188 if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
189 if (psmouse->pktcnt == 3) {
190 alps_process_packet(psmouse, regs);
191 return PSMOUSE_FULL_PACKET;
193 return PSMOUSE_GOOD_DATA;
196 if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
197 return PSMOUSE_BAD_DATA;
199 /* Bytes 2 - 6 should have 0 in the highest bit */
200 if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
201 (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
202 return PSMOUSE_BAD_DATA;
204 if (psmouse->pktcnt == 6) {
205 alps_process_packet(psmouse, regs);
206 return PSMOUSE_FULL_PACKET;
209 return PSMOUSE_GOOD_DATA;
212 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
214 struct ps2dev *ps2dev = &psmouse->ps2dev;
215 static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
216 unsigned char param[4];
220 * First try "E6 report".
221 * ALPS should return 0,0,10 or 0,0,100
224 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
225 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
226 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
227 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
230 param[0] = param[1] = param[2] = 0xff;
231 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
234 dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
236 if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
240 * Now try "E7 report". Allowed responses are in
241 * alps_model_data[].signature
244 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
245 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
246 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
247 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21))
250 param[0] = param[1] = param[2] = 0xff;
251 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
254 dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
256 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);
257 *version = (param[0] << 8) | (param[1] << 4) | i;
259 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
260 if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature)))
261 return alps_model_data + i;
267 * For DualPoint devices select the device that should respond to
268 * subsequent commands. It looks like glidepad is behind stickpointer,
269 * I'd thought it would be other way around...
271 static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
273 struct ps2dev *ps2dev = &psmouse->ps2dev;
274 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
276 if (ps2_command(ps2dev, NULL, cmd) ||
277 ps2_command(ps2dev, NULL, cmd) ||
278 ps2_command(ps2dev, NULL, cmd) ||
279 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
282 /* we may get 3 more bytes, just ignore them */
283 ps2_drain(ps2dev, 3, 100);
288 static int alps_absolute_mode(struct psmouse *psmouse)
290 struct ps2dev *ps2dev = &psmouse->ps2dev;
292 /* Try ALPS magic knock - 4 disable before enable */
293 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
294 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
295 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
296 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
297 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
301 * Switch mouse to poll (remote) mode so motion data will not
304 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
307 static int alps_get_status(struct psmouse *psmouse, char *param)
309 struct ps2dev *ps2dev = &psmouse->ps2dev;
311 /* Get status: 0xF5 0xF5 0xF5 0xE9 */
312 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
313 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
314 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
315 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
318 dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
324 * Turn touchpad tapping on or off. The sequences are:
325 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
326 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
327 * My guess that 0xE9 (GetInfo) is here as a sync point.
328 * For models that also have stickpointer (DualPoints) its tapping
329 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
330 * we don't fiddle with it.
332 static int alps_tap_mode(struct psmouse *psmouse, int enable)
334 struct ps2dev *ps2dev = &psmouse->ps2dev;
335 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
336 unsigned char tap_arg = enable ? 0x0A : 0x00;
337 unsigned char param[4];
339 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
340 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
341 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
342 ps2_command(ps2dev, &tap_arg, cmd))
345 if (alps_get_status(psmouse, param))
352 * alps_poll() - poll the touchpad for current motion packet.
355 static int alps_poll(struct psmouse *psmouse)
357 struct alps_data *priv = psmouse->private;
358 unsigned char buf[6];
361 if (priv->i->flags & ALPS_PASS)
362 alps_passthrough_mode(psmouse, 1);
364 poll_failed = ps2_command(&psmouse->ps2dev, buf,
365 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
367 if (priv->i->flags & ALPS_PASS)
368 alps_passthrough_mode(psmouse, 0);
370 if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
373 if ((psmouse->badbyte & 0xc8) == 0x08) {
375 * Poll the track stick ...
377 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
381 memcpy(psmouse->packet, buf, sizeof(buf));
385 static int alps_reconnect(struct psmouse *psmouse)
387 struct alps_data *priv = psmouse->private;
390 psmouse_reset(psmouse);
392 if (!(priv->i = alps_get_model(psmouse, &version)))
395 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
398 if (alps_tap_mode(psmouse, 1)) {
399 printk(KERN_WARNING "alps.c: Failed to reenable hardware tapping\n");
403 if (alps_absolute_mode(psmouse)) {
404 printk(KERN_ERR "alps.c: Failed to reenable absolute mode\n");
408 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
414 static void alps_disconnect(struct psmouse *psmouse)
416 struct alps_data *priv = psmouse->private;
418 psmouse_reset(psmouse);
419 input_unregister_device(priv->dev2);
423 int alps_init(struct psmouse *psmouse)
425 struct alps_data *priv;
426 struct input_dev *dev1 = psmouse->dev, *dev2;
429 psmouse->private = priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
430 dev2 = input_allocate_device();
436 if (!(priv->i = alps_get_model(psmouse, &version)))
439 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
442 if (alps_tap_mode(psmouse, 1))
443 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
445 if (alps_absolute_mode(psmouse)) {
446 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
450 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
453 dev1->evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
454 dev1->keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
455 dev1->keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
456 dev1->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
458 dev1->evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
459 input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
460 input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
461 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
463 if (priv->i->flags & ALPS_WHEEL) {
464 dev1->evbit[LONG(EV_REL)] |= BIT(EV_REL);
465 dev1->relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);
468 if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
469 dev1->keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
470 dev1->keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
473 snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
474 dev2->phys = priv->phys;
475 dev2->name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
476 dev2->id.bustype = BUS_I8042;
477 dev2->id.vendor = 0x0002;
478 dev2->id.product = PSMOUSE_ALPS;
479 dev2->id.version = 0x0000;
481 dev2->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
482 dev2->relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);
483 dev2->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
485 input_register_device(priv->dev2);
487 psmouse->protocol_handler = alps_process_byte;
488 psmouse->poll = alps_poll;
489 psmouse->disconnect = alps_disconnect;
490 psmouse->reconnect = alps_reconnect;
491 psmouse->pktsize = 6;
493 /* We are having trouble resyncing ALPS touchpads so disable it for now */
494 psmouse->resync_time = 0;
499 input_free_device(dev2);
504 int alps_detect(struct psmouse *psmouse, int set_properties)
507 const struct alps_model_info *model;
509 if (!(model = alps_get_model(psmouse, &version)))
512 if (set_properties) {
513 psmouse->vendor = "ALPS";
514 psmouse->name = model->flags & ALPS_DUALPOINT ?
515 "DualPoint TouchPad" : "GlidePoint";
516 psmouse->model = version;