2 * Synaptics TouchPad PS/2 mouse driver
4 * 2003 Dmitry Torokhov <dtor@mail.ru>
5 * Added support for pass-through port. Special thanks to Peter Berg Larsen
6 * for explaining various Synaptics quirks.
8 * 2003 Peter Osterlund <petero2@telia.com>
9 * Ported to 2.5 input device infrastructure.
11 * Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
12 * start merging tpconfig and gpm code to a xfree-input module
13 * adding some changes and extensions (ex. 3rd and 4th button)
15 * Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
16 * Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
17 * code for the special synaptics commands (from the tpconfig-source)
19 * This program is free software; you can redistribute it and/or modify it
20 * under the terms of the GNU General Public License version 2 as published by
21 * the Free Software Foundation.
23 * Trademarks are the property of their respective owners.
26 #include <linux/module.h>
27 #include <linux/delay.h>
28 #include <linux/dmi.h>
29 #include <linux/input/mt.h>
30 #include <linux/serio.h>
31 #include <linux/libps2.h>
32 #include <linux/slab.h>
34 #include "synaptics.h"
37 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
38 * section 2.3.2, which says that they should be valid regardless of the
39 * actual size of the sensor.
40 * Note that newer firmware allows querying device for maximum useable
43 #define XMIN_NOMINAL 1472
44 #define XMAX_NOMINAL 5472
45 #define YMIN_NOMINAL 1408
46 #define YMAX_NOMINAL 4448
49 * Synaptics touchpads report the y coordinate from bottom to top, which is
50 * opposite from what userspace expects.
51 * This function is used to invert y before reporting.
53 static int synaptics_invert_y(int y)
55 return YMAX_NOMINAL + YMIN_NOMINAL - y;
59 /*****************************************************************************
60 * Stuff we need even when we do not want native Synaptics support
61 ****************************************************************************/
64 * Set the synaptics touchpad mode byte by special commands
66 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
68 unsigned char param[1];
70 if (psmouse_sliced_command(psmouse, mode))
72 param[0] = SYN_PS_SET_MODE2;
73 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
78 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
80 struct ps2dev *ps2dev = &psmouse->ps2dev;
81 unsigned char param[4];
85 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
86 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
87 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
88 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
89 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
95 psmouse->vendor = "Synaptics";
96 psmouse->name = "TouchPad";
102 void synaptics_reset(struct psmouse *psmouse)
104 /* reset touchpad back to relative mode, gestures enabled */
105 synaptics_mode_cmd(psmouse, 0);
108 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
110 /*****************************************************************************
111 * Synaptics communications functions
112 ****************************************************************************/
115 * Send a command to the synpatics touchpad by special commands
117 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
119 if (psmouse_sliced_command(psmouse, c))
121 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
127 * Read the model-id bytes from the touchpad
128 * see also SYN_MODEL_* macros
130 static int synaptics_model_id(struct psmouse *psmouse)
132 struct synaptics_data *priv = psmouse->private;
135 if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
137 priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
142 * Read the capability-bits from the touchpad
143 * see also the SYN_CAP_* macros
145 static int synaptics_capability(struct psmouse *psmouse)
147 struct synaptics_data *priv = psmouse->private;
148 unsigned char cap[3];
150 if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
152 priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
153 priv->ext_cap = priv->ext_cap_0c = 0;
156 * Older firmwares had submodel ID fixed to 0x47
158 if (SYN_ID_FULL(priv->identity) < 0x705 &&
159 SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
164 * Unless capExtended is set the rest of the flags should be ignored
166 if (!SYN_CAP_EXTENDED(priv->capabilities))
167 priv->capabilities = 0;
169 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
170 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
171 psmouse_warn(psmouse,
172 "device claims to have extended capabilities, but I'm not able to read them.\n");
174 priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
177 * if nExtBtn is greater than 8 it should be considered
178 * invalid and treated as 0
180 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
181 priv->ext_cap &= 0xff0fff;
185 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
186 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
187 psmouse_warn(psmouse,
188 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
190 priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
199 * See also the SYN_ID_* macros
201 static int synaptics_identify(struct psmouse *psmouse)
203 struct synaptics_data *priv = psmouse->private;
206 if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
208 priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
209 if (SYN_ID_IS_SYNAPTICS(priv->identity))
215 * Read touchpad resolution and maximum reported coordinates
216 * Resolution is left zero if touchpad does not support the query
218 static int synaptics_resolution(struct psmouse *psmouse)
220 struct synaptics_data *priv = psmouse->private;
221 unsigned char resp[3];
223 if (SYN_ID_MAJOR(priv->identity) < 4)
226 if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
227 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
228 priv->x_res = resp[0]; /* x resolution in units/mm */
229 priv->y_res = resp[2]; /* y resolution in units/mm */
233 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
234 SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
235 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
236 psmouse_warn(psmouse,
237 "device claims to have max coordinates query, but I'm not able to read it.\n");
239 priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
240 priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
244 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
245 SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
246 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
247 psmouse_warn(psmouse,
248 "device claims to have min coordinates query, but I'm not able to read it.\n");
250 priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
251 priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
258 static int synaptics_query_hardware(struct psmouse *psmouse)
260 if (synaptics_identify(psmouse))
262 if (synaptics_model_id(psmouse))
264 if (synaptics_capability(psmouse))
266 if (synaptics_resolution(psmouse))
272 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
274 static unsigned char param = 0xc8;
275 struct synaptics_data *priv = psmouse->private;
277 if (!SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
280 if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
283 if (ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE))
286 /* Advanced gesture mode also sends multi finger data */
287 priv->capabilities |= BIT(1);
292 static int synaptics_set_mode(struct psmouse *psmouse)
294 struct synaptics_data *priv = psmouse->private;
297 if (priv->absolute_mode)
298 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
299 if (priv->disable_gesture)
300 priv->mode |= SYN_BIT_DISABLE_GESTURE;
301 if (psmouse->rate >= 80)
302 priv->mode |= SYN_BIT_HIGH_RATE;
303 if (SYN_CAP_EXTENDED(priv->capabilities))
304 priv->mode |= SYN_BIT_W_MODE;
306 if (synaptics_mode_cmd(psmouse, priv->mode))
309 if (priv->absolute_mode &&
310 synaptics_set_advanced_gesture_mode(psmouse)) {
311 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
318 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
320 struct synaptics_data *priv = psmouse->private;
323 priv->mode |= SYN_BIT_HIGH_RATE;
326 priv->mode &= ~SYN_BIT_HIGH_RATE;
330 synaptics_mode_cmd(psmouse, priv->mode);
333 /*****************************************************************************
334 * Synaptics pass-through PS/2 port support
335 ****************************************************************************/
336 static int synaptics_pt_write(struct serio *serio, unsigned char c)
338 struct psmouse *parent = serio_get_drvdata(serio->parent);
339 char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
341 if (psmouse_sliced_command(parent, c))
343 if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
348 static int synaptics_pt_start(struct serio *serio)
350 struct psmouse *parent = serio_get_drvdata(serio->parent);
351 struct synaptics_data *priv = parent->private;
353 serio_pause_rx(parent->ps2dev.serio);
354 priv->pt_port = serio;
355 serio_continue_rx(parent->ps2dev.serio);
360 static void synaptics_pt_stop(struct serio *serio)
362 struct psmouse *parent = serio_get_drvdata(serio->parent);
363 struct synaptics_data *priv = parent->private;
365 serio_pause_rx(parent->ps2dev.serio);
366 priv->pt_port = NULL;
367 serio_continue_rx(parent->ps2dev.serio);
370 static int synaptics_is_pt_packet(unsigned char *buf)
372 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
375 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
377 struct psmouse *child = serio_get_drvdata(ptport);
379 if (child && child->state == PSMOUSE_ACTIVATED) {
380 serio_interrupt(ptport, packet[1], 0);
381 serio_interrupt(ptport, packet[4], 0);
382 serio_interrupt(ptport, packet[5], 0);
383 if (child->pktsize == 4)
384 serio_interrupt(ptport, packet[2], 0);
386 serio_interrupt(ptport, packet[1], 0);
389 static void synaptics_pt_activate(struct psmouse *psmouse)
391 struct synaptics_data *priv = psmouse->private;
392 struct psmouse *child = serio_get_drvdata(priv->pt_port);
394 /* adjust the touchpad to child's choice of protocol */
396 if (child->pktsize == 4)
397 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
399 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
401 if (synaptics_mode_cmd(psmouse, priv->mode))
402 psmouse_warn(psmouse,
403 "failed to switch guest protocol\n");
407 static void synaptics_pt_create(struct psmouse *psmouse)
411 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
414 "not enough memory for pass-through port\n");
418 serio->id.type = SERIO_PS_PSTHRU;
419 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
420 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
421 serio->write = synaptics_pt_write;
422 serio->start = synaptics_pt_start;
423 serio->stop = synaptics_pt_stop;
424 serio->parent = psmouse->ps2dev.serio;
426 psmouse->pt_activate = synaptics_pt_activate;
428 psmouse_info(psmouse, "serio: %s port at %s\n",
429 serio->name, psmouse->phys);
430 serio_register_port(serio);
433 /*****************************************************************************
434 * Functions to interpret the absolute mode packets
435 ****************************************************************************/
437 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
440 state->count = count;
445 static void synaptics_parse_agm(const unsigned char buf[],
446 struct synaptics_data *priv,
447 struct synaptics_hw_state *hw)
449 struct synaptics_hw_state *agm = &priv->agm;
452 agm_packet_type = (buf[5] & 0x30) >> 4;
453 switch (agm_packet_type) {
455 /* Gesture packet: (x, y, z) half resolution */
457 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
458 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
459 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
463 /* AGM-CONTACT packet: (count, sgm, agm) */
464 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
471 /* Record that at least one AGM has been received since last SGM */
472 priv->agm_pending = true;
475 static int synaptics_parse_hw_state(const unsigned char buf[],
476 struct synaptics_data *priv,
477 struct synaptics_hw_state *hw)
479 memset(hw, 0, sizeof(struct synaptics_hw_state));
481 if (SYN_MODEL_NEWABS(priv->model_id)) {
482 hw->w = (((buf[0] & 0x30) >> 2) |
483 ((buf[0] & 0x04) >> 1) |
484 ((buf[3] & 0x04) >> 2));
486 hw->left = (buf[0] & 0x01) ? 1 : 0;
487 hw->right = (buf[0] & 0x02) ? 1 : 0;
489 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
491 * Clickpad's button is transmitted as middle button,
492 * however, since it is primary button, we will report
495 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
497 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
498 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
500 hw->scroll = (signed char)(buf[1]);
503 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
504 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
505 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
508 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
509 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
511 synaptics_parse_agm(buf, priv, hw);
515 hw->x = (((buf[3] & 0x10) << 8) |
516 ((buf[1] & 0x0f) << 8) |
518 hw->y = (((buf[3] & 0x20) << 7) |
519 ((buf[1] & 0xf0) << 4) |
523 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
524 ((buf[0] ^ buf[3]) & 0x02)) {
525 switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
528 * if nExtBtn is greater than 8 it should be
529 * considered invalid and treated as 0
533 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
534 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
536 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
537 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
539 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
540 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
542 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
543 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
547 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
548 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
550 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
551 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
553 hw->left = (buf[0] & 0x01) ? 1 : 0;
554 hw->right = (buf[0] & 0x02) ? 1 : 0;
560 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
561 bool active, int x, int y)
563 input_mt_slot(dev, slot);
564 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
566 input_report_abs(dev, ABS_MT_POSITION_X, x);
567 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
571 static void synaptics_report_semi_mt_data(struct input_dev *dev,
572 const struct synaptics_hw_state *a,
573 const struct synaptics_hw_state *b,
576 if (num_fingers >= 2) {
577 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
579 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
581 } else if (num_fingers == 1) {
582 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
583 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
585 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
586 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
590 static void synaptics_report_buttons(struct psmouse *psmouse,
591 const struct synaptics_hw_state *hw)
593 struct input_dev *dev = psmouse->dev;
594 struct synaptics_data *priv = psmouse->private;
597 input_report_key(dev, BTN_LEFT, hw->left);
598 input_report_key(dev, BTN_RIGHT, hw->right);
600 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
601 input_report_key(dev, BTN_MIDDLE, hw->middle);
603 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
604 input_report_key(dev, BTN_FORWARD, hw->up);
605 input_report_key(dev, BTN_BACK, hw->down);
608 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
609 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
612 static void synaptics_report_slot(struct input_dev *dev, int slot,
613 const struct synaptics_hw_state *hw)
615 input_mt_slot(dev, slot);
616 input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
620 input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
621 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
622 input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
625 static void synaptics_report_mt_data(struct psmouse *psmouse,
626 struct synaptics_mt_state *mt_state,
627 const struct synaptics_hw_state *sgm)
629 struct input_dev *dev = psmouse->dev;
630 struct synaptics_data *priv = psmouse->private;
631 struct synaptics_hw_state *agm = &priv->agm;
632 struct synaptics_mt_state *old = &priv->mt_state;
634 switch (mt_state->count) {
636 synaptics_report_slot(dev, 0, NULL);
637 synaptics_report_slot(dev, 1, NULL);
640 if (mt_state->sgm == -1) {
641 synaptics_report_slot(dev, 0, NULL);
642 synaptics_report_slot(dev, 1, NULL);
643 } else if (mt_state->sgm == 0) {
644 synaptics_report_slot(dev, 0, sgm);
645 synaptics_report_slot(dev, 1, NULL);
647 synaptics_report_slot(dev, 0, NULL);
648 synaptics_report_slot(dev, 1, sgm);
653 * If the finger slot contained in SGM is valid, and either
654 * hasn't changed, or is new, then report SGM in MTB slot 0.
655 * Otherwise, empty MTB slot 0.
657 if (mt_state->sgm != -1 &&
658 (mt_state->sgm == old->sgm || old->sgm == -1))
659 synaptics_report_slot(dev, 0, sgm);
661 synaptics_report_slot(dev, 0, NULL);
664 * If the finger slot contained in AGM is valid, and either
665 * hasn't changed, or is new, then report AGM in MTB slot 1.
666 * Otherwise, empty MTB slot 1.
668 if (mt_state->agm != -1 &&
669 (mt_state->agm == old->agm || old->agm == -1))
670 synaptics_report_slot(dev, 1, agm);
672 synaptics_report_slot(dev, 1, NULL);
676 /* Don't use active slot count to generate BTN_TOOL events. */
677 input_mt_report_pointer_emulation(dev, false);
679 /* Send the number of fingers reported by touchpad itself. */
680 input_mt_report_finger_count(dev, mt_state->count);
682 synaptics_report_buttons(psmouse, sgm);
687 /* Handle case where mt_state->count = 0 */
688 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
689 struct synaptics_mt_state *mt_state)
691 synaptics_mt_state_set(mt_state, 0, -1, -1);
692 priv->mt_state_lost = false;
695 /* Handle case where mt_state->count = 1 */
696 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
697 struct synaptics_mt_state *mt_state)
699 struct synaptics_hw_state *agm = &priv->agm;
700 struct synaptics_mt_state *old = &priv->mt_state;
703 * If the last AGM was (0,0,0), and there is only one finger left,
704 * then we absolutely know that SGM contains slot 0, and all other
705 * fingers have been removed.
707 if (priv->agm_pending && agm->z == 0) {
708 synaptics_mt_state_set(mt_state, 1, 0, -1);
709 priv->mt_state_lost = false;
713 switch (old->count) {
715 synaptics_mt_state_set(mt_state, 1, 0, -1);
719 * If mt_state_lost, then the previous transition was 3->1,
720 * and SGM now contains either slot 0 or 1, but we don't know
721 * which. So, we just assume that the SGM now contains slot 1.
723 * If pending AGM and either:
724 * (a) the previous SGM slot contains slot 0, or
725 * (b) there was no SGM slot
726 * then, the SGM now contains slot 1
728 * Case (a) happens with very rapid "drum roll" gestures, where
729 * slot 0 finger is lifted and a new slot 1 finger touches
730 * within one reporting interval.
732 * Case (b) happens if initially two or more fingers tap
733 * briefly, and all but one lift before the end of the first
734 * reporting interval.
736 * (In both these cases, slot 0 will becomes empty, so SGM
737 * contains slot 1 with the new finger)
739 * Else, if there was no previous SGM, it now contains slot 0.
741 * Otherwise, SGM still contains the same slot.
743 if (priv->mt_state_lost ||
744 (priv->agm_pending && old->sgm <= 0))
745 synaptics_mt_state_set(mt_state, 1, 1, -1);
746 else if (old->sgm == -1)
747 synaptics_mt_state_set(mt_state, 1, 0, -1);
751 * If mt_state_lost, we don't know which finger SGM contains.
753 * So, report 1 finger, but with both slots empty.
754 * We will use slot 1 on subsequent 1->1
756 if (priv->mt_state_lost) {
757 synaptics_mt_state_set(mt_state, 1, -1, -1);
761 * Since the last AGM was NOT (0,0,0), it was the finger in
762 * slot 0 that has been removed.
763 * So, SGM now contains previous AGM's slot, and AGM is now
766 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
770 * Since last AGM was not (0,0,0), we don't know which finger
773 * So, report 1 finger, but with both slots empty.
774 * We will use slot 1 on subsequent 1->1
776 synaptics_mt_state_set(mt_state, 1, -1, -1);
777 priv->mt_state_lost = true;
781 /* mt_state was updated by AGM-CONTACT packet */
786 /* Handle case where mt_state->count = 2 */
787 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
788 struct synaptics_mt_state *mt_state)
790 struct synaptics_mt_state *old = &priv->mt_state;
792 switch (old->count) {
794 synaptics_mt_state_set(mt_state, 2, 0, 1);
798 * If previous SGM contained slot 1 or higher, SGM now contains
799 * slot 0 (the newly touching finger) and AGM contains SGM's
802 * Otherwise, SGM still contains slot 0 and AGM now contains
806 synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
808 synaptics_mt_state_set(mt_state, 2, 0, 1);
812 * If mt_state_lost, SGM now contains either finger 1 or 2, but
813 * we don't know which.
814 * So, we just assume that the SGM contains slot 0 and AGM 1.
816 if (priv->mt_state_lost)
817 synaptics_mt_state_set(mt_state, 2, 0, 1);
819 * Otherwise, use the same mt_state, since it either hasn't
820 * changed, or was updated by a recently received AGM-CONTACT
826 * 3->2 transitions have two unsolvable problems:
827 * 1) no indication is given which finger was removed
828 * 2) no way to tell if agm packet was for finger 3
829 * before 3->2, or finger 2 after 3->2.
831 * So, report 2 fingers, but empty all slots.
832 * We will guess slots [0,1] on subsequent 2->2.
834 synaptics_mt_state_set(mt_state, 2, -1, -1);
835 priv->mt_state_lost = true;
839 /* mt_state was updated by AGM-CONTACT packet */
844 /* Handle case where mt_state->count = 3 */
845 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
846 struct synaptics_mt_state *mt_state)
848 struct synaptics_mt_state *old = &priv->mt_state;
850 switch (old->count) {
852 synaptics_mt_state_set(mt_state, 3, 0, 2);
856 * If previous SGM contained slot 2 or higher, SGM now contains
857 * slot 0 (one of the newly touching fingers) and AGM contains
858 * SGM's previous slot.
860 * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
863 synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
865 synaptics_mt_state_set(mt_state, 3, 0, 2);
869 * If the AGM previously contained slot 3 or higher, then the
870 * newly touching finger is in the lowest available slot.
872 * If SGM was previously 1 or higher, then the new SGM is
873 * now slot 0 (with a new finger), otherwise, the new finger
874 * is now in a hidden slot between 0 and AGM's slot.
876 * In all such cases, the SGM now contains slot 0, and the AGM
877 * continues to contain the same slot as before.
880 synaptics_mt_state_set(mt_state, 3, 0, old->agm);
885 * After some 3->1 and all 3->2 transitions, we lose track
886 * of which slot is reported by SGM and AGM.
888 * For 2->3 in this state, report 3 fingers, but empty all
889 * slots, and we will guess (0,2) on a subsequent 0->3.
891 * To userspace, the resulting transition will look like:
892 * 2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
894 if (priv->mt_state_lost) {
895 synaptics_mt_state_set(mt_state, 3, -1, -1);
900 * If the (SGM,AGM) really previously contained slots (0, 1),
901 * then we cannot know what slot was just reported by the AGM,
902 * because the 2->3 transition can occur either before or after
903 * the AGM packet. Thus, this most recent AGM could contain
904 * either the same old slot 1 or the new slot 2.
905 * Subsequent AGMs will be reporting slot 2.
907 * To userspace, the resulting transition will look like:
908 * 2:[0,1] -> 3:[0,-1] -> 3:[0,2]
910 synaptics_mt_state_set(mt_state, 3, 0, -1);
914 * If, for whatever reason, the previous agm was invalid,
915 * Assume SGM now contains slot 0, AGM now contains slot 2.
918 synaptics_mt_state_set(mt_state, 3, 0, 2);
920 * mt_state either hasn't changed, or was updated by a recently
921 * received AGM-CONTACT packet.
927 /* mt_state was updated by AGM-CONTACT packet */
932 /* Handle case where mt_state->count = 4, or = 5 */
933 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
934 struct synaptics_mt_state *mt_state)
936 /* mt_state was updated correctly by AGM-CONTACT packet */
937 priv->mt_state_lost = false;
940 static void synaptics_image_sensor_process(struct psmouse *psmouse,
941 struct synaptics_hw_state *sgm)
943 struct synaptics_data *priv = psmouse->private;
944 struct synaptics_hw_state *agm = &priv->agm;
945 struct synaptics_mt_state mt_state;
947 /* Initialize using current mt_state (as updated by last agm) */
948 mt_state = agm->mt_state;
951 * Update mt_state using the new finger count and current mt_state.
954 synaptics_image_sensor_0f(priv, &mt_state);
955 else if (sgm->w >= 4)
956 synaptics_image_sensor_1f(priv, &mt_state);
957 else if (sgm->w == 0)
958 synaptics_image_sensor_2f(priv, &mt_state);
959 else if (sgm->w == 1 && mt_state.count <= 3)
960 synaptics_image_sensor_3f(priv, &mt_state);
962 synaptics_image_sensor_45f(priv, &mt_state);
964 /* Send resulting input events to user space */
965 synaptics_report_mt_data(psmouse, &mt_state, sgm);
967 /* Store updated mt_state */
968 priv->mt_state = agm->mt_state = mt_state;
969 priv->agm_pending = false;
973 * called for each full received packet from the touchpad
975 static void synaptics_process_packet(struct psmouse *psmouse)
977 struct input_dev *dev = psmouse->dev;
978 struct synaptics_data *priv = psmouse->private;
979 struct synaptics_hw_state hw;
983 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
986 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
987 synaptics_image_sensor_process(psmouse, &hw);
992 priv->scroll += hw.scroll;
994 while (priv->scroll >= 4) {
995 input_report_key(dev, BTN_BACK, !hw.down);
997 input_report_key(dev, BTN_BACK, hw.down);
1001 while (priv->scroll <= -4) {
1002 input_report_key(dev, BTN_FORWARD, !hw.up);
1004 input_report_key(dev, BTN_FORWARD, hw.up);
1011 if (hw.z > 0 && hw.x > 1) {
1014 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1017 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1018 num_fingers = hw.w + 2;
1021 if (SYN_MODEL_PEN(priv->model_id))
1022 ; /* Nothing, treat a pen as a single finger */
1025 if (SYN_CAP_PALMDETECT(priv->capabilities))
1026 finger_width = hw.w;
1035 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1036 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1040 * BTN_TOUCH has to be first as mousedev relies on it when doing
1041 * absolute -> relative conversion
1043 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1044 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1046 if (num_fingers > 0) {
1047 input_report_abs(dev, ABS_X, hw.x);
1048 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1050 input_report_abs(dev, ABS_PRESSURE, hw.z);
1052 if (SYN_CAP_PALMDETECT(priv->capabilities))
1053 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1055 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1056 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1057 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1058 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1061 synaptics_report_buttons(psmouse, &hw);
1066 static int synaptics_validate_byte(struct psmouse *psmouse,
1067 int idx, unsigned char pkt_type)
1069 static const unsigned char newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1070 static const unsigned char newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1071 static const unsigned char newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1072 static const unsigned char oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1073 static const unsigned char oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1074 const char *packet = psmouse->packet;
1076 if (idx < 0 || idx > 4)
1082 case SYN_NEWABS_RELAXED:
1083 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1085 case SYN_NEWABS_STRICT:
1086 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1089 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1092 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1097 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1101 for (i = 0; i < 5; i++)
1102 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1103 psmouse_info(psmouse, "using relaxed packet validation\n");
1104 return SYN_NEWABS_RELAXED;
1107 return SYN_NEWABS_STRICT;
1110 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1112 struct synaptics_data *priv = psmouse->private;
1114 if (psmouse->pktcnt >= 6) { /* Full packet received */
1115 if (unlikely(priv->pkt_type == SYN_NEWABS))
1116 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1118 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1119 synaptics_is_pt_packet(psmouse->packet)) {
1121 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1123 synaptics_process_packet(psmouse);
1125 return PSMOUSE_FULL_PACKET;
1128 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1129 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1132 /*****************************************************************************
1133 * Driver initialization/cleanup functions
1134 ****************************************************************************/
1135 static void set_abs_position_params(struct input_dev *dev,
1136 struct synaptics_data *priv, int x_code,
1139 int x_min = priv->x_min ?: XMIN_NOMINAL;
1140 int x_max = priv->x_max ?: XMAX_NOMINAL;
1141 int y_min = priv->y_min ?: YMIN_NOMINAL;
1142 int y_max = priv->y_max ?: YMAX_NOMINAL;
1143 int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1144 SYN_REDUCED_FILTER_FUZZ : 0;
1146 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1147 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1148 input_abs_set_res(dev, x_code, priv->x_res);
1149 input_abs_set_res(dev, y_code, priv->y_res);
1152 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
1156 /* Things that apply to both modes */
1157 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1158 __set_bit(EV_KEY, dev->evbit);
1159 __set_bit(BTN_LEFT, dev->keybit);
1160 __set_bit(BTN_RIGHT, dev->keybit);
1162 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1163 __set_bit(BTN_MIDDLE, dev->keybit);
1165 if (!priv->absolute_mode) {
1167 __set_bit(EV_REL, dev->evbit);
1168 __set_bit(REL_X, dev->relbit);
1169 __set_bit(REL_Y, dev->relbit);
1174 __set_bit(EV_ABS, dev->evbit);
1175 set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1176 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1178 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1179 input_mt_init_slots(dev, 2);
1180 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1182 /* Image sensors can report per-contact pressure */
1183 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1185 /* Image sensors can signal 4 and 5 finger clicks */
1186 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1187 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1188 } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1189 /* Non-image sensors with AGM use semi-mt */
1190 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1191 input_mt_init_slots(dev, 2);
1192 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1196 if (SYN_CAP_PALMDETECT(priv->capabilities))
1197 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1199 __set_bit(BTN_TOUCH, dev->keybit);
1200 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1202 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1203 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1204 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1207 if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1208 SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1209 __set_bit(BTN_FORWARD, dev->keybit);
1210 __set_bit(BTN_BACK, dev->keybit);
1213 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1214 __set_bit(BTN_0 + i, dev->keybit);
1216 __clear_bit(EV_REL, dev->evbit);
1217 __clear_bit(REL_X, dev->relbit);
1218 __clear_bit(REL_Y, dev->relbit);
1220 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1221 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1222 /* Clickpads report only left button */
1223 __clear_bit(BTN_RIGHT, dev->keybit);
1224 __clear_bit(BTN_MIDDLE, dev->keybit);
1228 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1229 void *data, char *buf)
1231 struct synaptics_data *priv = psmouse->private;
1233 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1236 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1237 void *data, const char *buf,
1240 struct synaptics_data *priv = psmouse->private;
1244 err = kstrtouint(buf, 10, &value);
1251 if (value == priv->disable_gesture)
1254 priv->disable_gesture = value;
1256 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1258 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1260 if (synaptics_mode_cmd(psmouse, priv->mode))
1266 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1267 synaptics_show_disable_gesture,
1268 synaptics_set_disable_gesture);
1270 static void synaptics_disconnect(struct psmouse *psmouse)
1272 struct synaptics_data *priv = psmouse->private;
1274 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1275 device_remove_file(&psmouse->ps2dev.serio->dev,
1276 &psmouse_attr_disable_gesture.dattr);
1278 synaptics_reset(psmouse);
1280 psmouse->private = NULL;
1283 static int synaptics_reconnect(struct psmouse *psmouse)
1285 struct synaptics_data *priv = psmouse->private;
1286 struct synaptics_data old_priv = *priv;
1291 psmouse_reset(psmouse);
1294 * On some boxes, right after resuming, the touchpad
1295 * needs some time to finish initializing (I assume
1296 * it needs time to calibrate) and start responding
1297 * to Synaptics-specific queries, so let's wait a
1302 error = synaptics_detect(psmouse, 0);
1303 } while (error && ++retry < 3);
1309 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1311 if (synaptics_query_hardware(psmouse)) {
1312 psmouse_err(psmouse, "Unable to query device.\n");
1316 if (synaptics_set_mode(psmouse)) {
1317 psmouse_err(psmouse, "Unable to initialize device.\n");
1321 if (old_priv.identity != priv->identity ||
1322 old_priv.model_id != priv->model_id ||
1323 old_priv.capabilities != priv->capabilities ||
1324 old_priv.ext_cap != priv->ext_cap) {
1325 psmouse_err(psmouse,
1326 "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1327 old_priv.identity, priv->identity,
1328 old_priv.model_id, priv->model_id,
1329 old_priv.capabilities, priv->capabilities,
1330 old_priv.ext_cap, priv->ext_cap);
1337 static bool impaired_toshiba_kbc;
1339 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
1340 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1342 /* Toshiba Satellite */
1344 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1345 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1349 /* Toshiba Dynabook */
1351 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1352 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1356 /* Toshiba Portege M300 */
1358 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1359 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1364 /* Toshiba Portege M300 */
1366 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1367 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1368 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1376 static bool broken_olpc_ec;
1378 static const struct dmi_system_id __initconst olpc_dmi_table[] = {
1379 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1381 /* OLPC XO-1 or XO-1.5 */
1383 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1384 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1391 void __init synaptics_module_init(void)
1393 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1394 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1397 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1399 struct synaptics_data *priv;
1403 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1404 * packet spew overloads the EC such that key presses on the keyboard
1405 * are missed. Given that, don't even attempt to use Absolute mode.
1406 * Relative mode seems to work just fine.
1408 if (absolute_mode && broken_olpc_ec) {
1409 psmouse_info(psmouse,
1410 "OLPC XO detected, not enabling Synaptics protocol.\n");
1414 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1418 psmouse_reset(psmouse);
1420 if (synaptics_query_hardware(psmouse)) {
1421 psmouse_err(psmouse, "Unable to query device.\n");
1425 priv->absolute_mode = absolute_mode;
1426 if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1427 priv->disable_gesture = true;
1429 if (synaptics_set_mode(psmouse)) {
1430 psmouse_err(psmouse, "Unable to initialize device.\n");
1434 priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1436 psmouse_info(psmouse,
1437 "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
1438 SYN_ID_MODEL(priv->identity),
1439 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1441 priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
1443 set_input_params(psmouse->dev, priv);
1446 * Encode touchpad model so that it can be used to set
1447 * input device->id.version and be visible to userspace.
1448 * Because version is __u16 we have to drop something.
1449 * Hardware info bits seem to be good candidates as they
1450 * are documented to be for Synaptics corp. internal use.
1452 psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1453 (priv->model_id & 0x000000ff);
1455 if (absolute_mode) {
1456 psmouse->protocol_handler = synaptics_process_byte;
1457 psmouse->pktsize = 6;
1459 /* Relative mode follows standard PS/2 mouse protocol */
1460 psmouse->protocol_handler = psmouse_process_byte;
1461 psmouse->pktsize = 3;
1464 psmouse->set_rate = synaptics_set_rate;
1465 psmouse->disconnect = synaptics_disconnect;
1466 psmouse->reconnect = synaptics_reconnect;
1467 psmouse->cleanup = synaptics_reset;
1468 /* Synaptics can usually stay in sync without extra help */
1469 psmouse->resync_time = 0;
1471 if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1472 synaptics_pt_create(psmouse);
1475 * Toshiba's KBC seems to have trouble handling data from
1476 * Synaptics at full rate. Switch to a lower rate (roughly
1477 * the same rate as a standard PS/2 mouse).
1479 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1480 psmouse_info(psmouse,
1481 "Toshiba %s detected, limiting rate to 40pps.\n",
1482 dmi_get_system_info(DMI_PRODUCT_NAME));
1486 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1487 err = device_create_file(&psmouse->ps2dev.serio->dev,
1488 &psmouse_attr_disable_gesture.dattr);
1490 psmouse_err(psmouse,
1491 "Failed to create disable_gesture attribute (%d)",
1504 int synaptics_init(struct psmouse *psmouse)
1506 return __synaptics_init(psmouse, true);
1509 int synaptics_init_relative(struct psmouse *psmouse)
1511 return __synaptics_init(psmouse, false);
1514 bool synaptics_supported(void)
1519 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1521 void __init synaptics_module_init(void)
1525 int synaptics_init(struct psmouse *psmouse)
1530 bool synaptics_supported(void)
1535 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */