2 * ALPS touchpad PS/2 mouse driver
4 * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
5 * Copyright (c) 2003 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 0x04
34 #define ALPS_4BTN 0x08
35 #define ALPS_OLDPROTO 0x10
36 #define ALPS_PASS 0x20
38 static struct alps_model_info alps_model_data[] = {
39 { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO }, /* UMAX-530T */
40 { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
41 { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
42 { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
43 { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
44 { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, 0 },
45 { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
46 { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK }, /* NEC Versa L320 */
47 { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
48 { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS }, /* Dell Latitude D800 */
49 { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
50 { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
51 { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
52 { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
53 { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
57 * XXX - this entry is suspicious. First byte has zero lower nibble,
58 * which is what a normal mouse would report. Also, the value 0x0e
59 * isn't valid per PS/2 spec.
63 * ALPS abolute Mode - new format
65 * byte 0: 1 ? ? ? 1 ? ? ?
66 * byte 1: 0 x6 x5 x4 x3 x2 x1 x0
67 * byte 2: 0 x10 x9 x8 x7 ? fin ges
68 * byte 3: 0 y9 y8 y7 1 M R L
69 * byte 4: 0 y6 y5 y4 y3 y2 y1 y0
70 * byte 5: 0 z6 z5 z4 z3 z2 z1 z0
72 * ?'s can have different meanings on different models,
73 * such as wheel rotation, extra buttons, stick buttons
74 * on a dualpoint, etc.
77 static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs)
79 struct alps_data *priv = psmouse->private;
80 unsigned char *packet = psmouse->packet;
81 struct input_dev *dev = &psmouse->dev;
82 struct input_dev *dev2 = &priv->dev2;
83 int x, y, z, ges, fin, left, right, middle;
85 input_regs(dev, regs);
87 if ((packet[0] & 0xc8) == 0x08) { /* 3-byte PS/2 packet */
88 input_report_key(dev2, BTN_LEFT, packet[0] & 1);
89 input_report_key(dev2, BTN_RIGHT, packet[0] & 2);
90 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
91 input_report_rel(dev2, REL_X,
92 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
93 input_report_rel(dev2, REL_Y,
94 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
99 if (priv->i->flags & ALPS_OLDPROTO) {
100 left = packet[2] & 0x08;
101 right = packet[2] & 0x10;
103 x = packet[1] | ((packet[0] & 0x07) << 7);
104 y = packet[4] | ((packet[3] & 0x07) << 7);
107 left = packet[3] & 1;
108 right = packet[3] & 2;
109 middle = packet[3] & 4;
110 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
111 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
118 input_report_key(dev, BTN_LEFT, left);
119 input_report_key(dev, BTN_RIGHT, right);
120 input_report_key(dev, BTN_MIDDLE, middle);
122 if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
123 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
124 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
130 /* Convert hardware tap to a reasonable Z value */
131 if (ges && !fin) z = 40;
134 * A "tap and drag" operation is reported by the hardware as a transition
135 * from (!fin && ges) to (fin && ges). This should be translated to the
136 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
138 if (ges && fin && !priv->prev_fin) {
139 input_report_abs(dev, ABS_X, x);
140 input_report_abs(dev, ABS_Y, y);
141 input_report_abs(dev, ABS_PRESSURE, 0);
142 input_report_key(dev, BTN_TOOL_FINGER, 0);
145 priv->prev_fin = fin;
147 if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
148 if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
151 input_report_abs(dev, ABS_X, x);
152 input_report_abs(dev, ABS_Y, y);
155 input_report_abs(dev, ABS_PRESSURE, z);
156 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
159 if (priv->i->flags & ALPS_WHEEL)
160 input_report_rel(dev, REL_WHEEL, ((packet[0] >> 4) & 0x07) | ((packet[2] >> 2) & 0x08));
162 if (priv->i->flags & ALPS_FW_BK) {
163 input_report_key(dev, BTN_FORWARD, packet[0] & 0x10);
164 input_report_key(dev, BTN_BACK, packet[2] & 0x04);
170 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
172 struct alps_data *priv = psmouse->private;
174 if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
175 if (psmouse->pktcnt == 3) {
176 alps_process_packet(psmouse, regs);
177 return PSMOUSE_FULL_PACKET;
179 return PSMOUSE_GOOD_DATA;
182 if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
183 return PSMOUSE_BAD_DATA;
185 /* Bytes 2 - 6 should have 0 in the highest bit */
186 if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
187 (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
188 return PSMOUSE_BAD_DATA;
190 if (psmouse->pktcnt == 6) {
191 alps_process_packet(psmouse, regs);
192 return PSMOUSE_FULL_PACKET;
195 return PSMOUSE_GOOD_DATA;
198 static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
200 struct ps2dev *ps2dev = &psmouse->ps2dev;
201 unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
202 unsigned char param[4];
206 * First try "E6 report".
207 * ALPS should return 0,0,10 or 0,0,100
210 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
211 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
212 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
213 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
216 param[0] = param[1] = param[2] = 0xff;
217 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
220 dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
222 if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
226 * Now try "E7 report". Allowed responses are in
227 * alps_model_data[].signature
230 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
231 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
232 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
233 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21))
236 param[0] = param[1] = param[2] = 0xff;
237 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
240 dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
242 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);
243 *version = (param[0] << 8) | (param[1] << 4) | i;
245 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
246 if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature)))
247 return alps_model_data + i;
253 * For DualPoint devices select the device that should respond to
254 * subsequent commands. It looks like glidepad is behind stickpointer,
255 * I'd thought it would be other way around...
257 static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
259 struct ps2dev *ps2dev = &psmouse->ps2dev;
260 unsigned char param[3];
261 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
263 if (ps2_command(ps2dev, NULL, cmd) ||
264 ps2_command(ps2dev, NULL, cmd) ||
265 ps2_command(ps2dev, NULL, cmd) ||
266 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
269 /* we may get 3 more bytes, just ignore them */
270 ps2_command(ps2dev, param, 0x0300);
275 static int alps_absolute_mode(struct psmouse *psmouse)
277 struct ps2dev *ps2dev = &psmouse->ps2dev;
279 /* Try ALPS magic knock - 4 disable before enable */
280 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
281 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
282 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
283 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
284 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
288 * Switch mouse to poll (remote) mode so motion data will not
291 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
294 static int alps_get_status(struct psmouse *psmouse, char *param)
296 struct ps2dev *ps2dev = &psmouse->ps2dev;
298 /* Get status: 0xF5 0xF5 0xF5 0xE9 */
299 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
300 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
301 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
302 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
305 dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
311 * Turn touchpad tapping on or off. The sequences are:
312 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
313 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
314 * My guess that 0xE9 (GetInfo) is here as a sync point.
315 * For models that also have stickpointer (DualPoints) its tapping
316 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
317 * we don't fiddle with it.
319 static int alps_tap_mode(struct psmouse *psmouse, int enable)
321 struct ps2dev *ps2dev = &psmouse->ps2dev;
322 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
323 unsigned char tap_arg = enable ? 0x0A : 0x00;
324 unsigned char param[4];
326 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
327 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
328 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
329 ps2_command(ps2dev, &tap_arg, cmd))
332 if (alps_get_status(psmouse, param))
338 static int alps_reconnect(struct psmouse *psmouse)
340 struct alps_data *priv = psmouse->private;
341 unsigned char param[4];
344 psmouse_reset(psmouse);
346 if (!(priv->i = alps_get_model(psmouse, &version)))
349 if (priv->i->flags & ALPS_PASS && alps_passthrough_mode(psmouse, 1))
352 if (alps_get_status(psmouse, param))
356 alps_tap_mode(psmouse, 1);
358 if (alps_absolute_mode(psmouse)) {
359 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
363 if (priv->i->flags == ALPS_PASS && alps_passthrough_mode(psmouse, 0))
369 static void alps_disconnect(struct psmouse *psmouse)
371 struct alps_data *priv = psmouse->private;
372 psmouse_reset(psmouse);
373 input_unregister_device(&priv->dev2);
377 int alps_init(struct psmouse *psmouse)
379 struct alps_data *priv;
380 unsigned char param[4];
383 psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL);
386 memset(priv, 0, sizeof(struct alps_data));
388 if (!(priv->i = alps_get_model(psmouse, &version)))
391 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
394 if (alps_get_status(psmouse, param)) {
395 printk(KERN_ERR "alps.c: touchpad status report request failed\n");
399 if (param[0] & 0x04) {
400 printk(KERN_INFO "alps.c: Enabling hardware tapping\n");
401 if (alps_tap_mode(psmouse, 1))
402 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
405 if (alps_absolute_mode(psmouse)) {
406 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
410 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
413 psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
414 psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
415 psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
416 psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
418 psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
419 input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);
420 input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0);
421 input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);
423 if (priv->i->flags & ALPS_WHEEL) {
424 psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL);
425 psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);
428 if (priv->i->flags & ALPS_FW_BK) {
429 psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
430 psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
433 sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys);
434 priv->dev2.phys = priv->phys;
435 priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
436 priv->dev2.id.bustype = BUS_I8042;
437 priv->dev2.id.vendor = 0x0002;
438 priv->dev2.id.product = PSMOUSE_ALPS;
439 priv->dev2.id.version = 0x0000;
441 priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
442 priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);
443 priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
445 input_register_device(&priv->dev2);
447 printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys);
449 psmouse->protocol_handler = alps_process_byte;
450 psmouse->disconnect = alps_disconnect;
451 psmouse->reconnect = alps_reconnect;
452 psmouse->pktsize = 6;
461 int alps_detect(struct psmouse *psmouse, int set_properties)
464 struct alps_model_info *model;
466 if (!(model = alps_get_model(psmouse, &version)))
469 if (set_properties) {
470 psmouse->vendor = "ALPS";
471 if (model->flags & ALPS_DUALPOINT)
472 psmouse->name = "DualPoint TouchPad";
474 psmouse->name = "GlidePoint";
475 psmouse->model = version;