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
47 #define XMIN_NOMINAL 1472
48 #define XMAX_NOMINAL 5472
49 #define YMIN_NOMINAL 1408
50 #define YMAX_NOMINAL 4448
52 /* Size in bits of absolute position values reported by the hardware */
53 #define ABS_POS_BITS 13
56 * These values should represent the absolute maximum value that will
57 * be reported for a positive position value. Some Synaptics firmware
58 * uses this value to indicate a finger near the edge of the touchpad
59 * whose precise position cannot be determined.
61 * At least one touchpad is known to report positions in excess of this
62 * value which are actually negative values truncated to the 13-bit
63 * reporting range. These values have never been observed to be lower
64 * than 8184 (i.e. -8), so we treat all values greater than 8176 as
65 * negative and any other value as positive.
67 #define X_MAX_POSITIVE 8176
68 #define Y_MAX_POSITIVE 8176
71 * Synaptics touchpads report the y coordinate from bottom to top, which is
72 * opposite from what userspace expects.
73 * This function is used to invert y before reporting.
75 static int synaptics_invert_y(int y)
77 return YMAX_NOMINAL + YMIN_NOMINAL - y;
81 /*****************************************************************************
82 * Stuff we need even when we do not want native Synaptics support
83 ****************************************************************************/
86 * Set the synaptics touchpad mode byte by special commands
88 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
90 unsigned char param[1];
92 if (psmouse_sliced_command(psmouse, mode))
94 param[0] = SYN_PS_SET_MODE2;
95 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
100 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
102 struct ps2dev *ps2dev = &psmouse->ps2dev;
103 unsigned char param[4];
107 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
108 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
109 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
110 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
111 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
113 if (param[1] != 0x47)
116 if (set_properties) {
117 psmouse->vendor = "Synaptics";
118 psmouse->name = "TouchPad";
124 void synaptics_reset(struct psmouse *psmouse)
126 /* reset touchpad back to relative mode, gestures enabled */
127 synaptics_mode_cmd(psmouse, 0);
130 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
132 /*****************************************************************************
133 * Synaptics communications functions
134 ****************************************************************************/
137 * Send a command to the synpatics touchpad by special commands
139 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
141 if (psmouse_sliced_command(psmouse, c))
143 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
149 * Read the model-id bytes from the touchpad
150 * see also SYN_MODEL_* macros
152 static int synaptics_model_id(struct psmouse *psmouse)
154 struct synaptics_data *priv = psmouse->private;
157 if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
159 priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
164 * Read the capability-bits from the touchpad
165 * see also the SYN_CAP_* macros
167 static int synaptics_capability(struct psmouse *psmouse)
169 struct synaptics_data *priv = psmouse->private;
170 unsigned char cap[3];
172 if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
174 priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
175 priv->ext_cap = priv->ext_cap_0c = 0;
178 * Older firmwares had submodel ID fixed to 0x47
180 if (SYN_ID_FULL(priv->identity) < 0x705 &&
181 SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
186 * Unless capExtended is set the rest of the flags should be ignored
188 if (!SYN_CAP_EXTENDED(priv->capabilities))
189 priv->capabilities = 0;
191 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
192 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
193 psmouse_warn(psmouse,
194 "device claims to have extended capabilities, but I'm not able to read them.\n");
196 priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
199 * if nExtBtn is greater than 8 it should be considered
200 * invalid and treated as 0
202 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
203 priv->ext_cap &= 0xff0fff;
207 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
208 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
209 psmouse_warn(psmouse,
210 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
212 priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
221 * See also the SYN_ID_* macros
223 static int synaptics_identify(struct psmouse *psmouse)
225 struct synaptics_data *priv = psmouse->private;
228 if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
230 priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
231 if (SYN_ID_IS_SYNAPTICS(priv->identity))
237 * Read touchpad resolution and maximum reported coordinates
238 * Resolution is left zero if touchpad does not support the query
241 static const int *quirk_min_max;
243 static int synaptics_resolution(struct psmouse *psmouse)
245 struct synaptics_data *priv = psmouse->private;
246 unsigned char resp[3];
249 priv->x_min = quirk_min_max[0];
250 priv->x_max = quirk_min_max[1];
251 priv->y_min = quirk_min_max[2];
252 priv->y_max = quirk_min_max[3];
256 if (SYN_ID_MAJOR(priv->identity) < 4)
259 if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
260 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
261 priv->x_res = resp[0]; /* x resolution in units/mm */
262 priv->y_res = resp[2]; /* y resolution in units/mm */
266 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
267 SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
268 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
269 psmouse_warn(psmouse,
270 "device claims to have max coordinates query, but I'm not able to read it.\n");
272 priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
273 priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
277 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
278 SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
279 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
280 psmouse_warn(psmouse,
281 "device claims to have min coordinates query, but I'm not able to read it.\n");
283 priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
284 priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
291 static int synaptics_query_hardware(struct psmouse *psmouse)
293 if (synaptics_identify(psmouse))
295 if (synaptics_model_id(psmouse))
297 if (synaptics_capability(psmouse))
299 if (synaptics_resolution(psmouse))
305 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
307 struct synaptics_data *priv = psmouse->private;
309 priv->mode = SYN_BIT_ABSOLUTE_MODE;
310 if (SYN_ID_MAJOR(priv->identity) >= 4)
311 priv->mode |= SYN_BIT_DISABLE_GESTURE;
312 if (SYN_CAP_EXTENDED(priv->capabilities))
313 priv->mode |= SYN_BIT_W_MODE;
315 if (synaptics_mode_cmd(psmouse, priv->mode))
321 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
323 struct synaptics_data *priv = psmouse->private;
326 priv->mode |= SYN_BIT_HIGH_RATE;
329 priv->mode &= ~SYN_BIT_HIGH_RATE;
333 synaptics_mode_cmd(psmouse, priv->mode);
336 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
338 static unsigned char param = 0xc8;
339 struct synaptics_data *priv = psmouse->private;
341 if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
342 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
345 if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
347 if (ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE))
350 /* Advanced gesture mode also sends multi finger data */
351 priv->capabilities |= BIT(1);
356 /*****************************************************************************
357 * Synaptics pass-through PS/2 port support
358 ****************************************************************************/
359 static int synaptics_pt_write(struct serio *serio, unsigned char c)
361 struct psmouse *parent = serio_get_drvdata(serio->parent);
362 char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
364 if (psmouse_sliced_command(parent, c))
366 if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
371 static int synaptics_pt_start(struct serio *serio)
373 struct psmouse *parent = serio_get_drvdata(serio->parent);
374 struct synaptics_data *priv = parent->private;
376 serio_pause_rx(parent->ps2dev.serio);
377 priv->pt_port = serio;
378 serio_continue_rx(parent->ps2dev.serio);
383 static void synaptics_pt_stop(struct serio *serio)
385 struct psmouse *parent = serio_get_drvdata(serio->parent);
386 struct synaptics_data *priv = parent->private;
388 serio_pause_rx(parent->ps2dev.serio);
389 priv->pt_port = NULL;
390 serio_continue_rx(parent->ps2dev.serio);
393 static int synaptics_is_pt_packet(unsigned char *buf)
395 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
398 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
400 struct psmouse *child = serio_get_drvdata(ptport);
402 if (child && child->state == PSMOUSE_ACTIVATED) {
403 serio_interrupt(ptport, packet[1], 0);
404 serio_interrupt(ptport, packet[4], 0);
405 serio_interrupt(ptport, packet[5], 0);
406 if (child->pktsize == 4)
407 serio_interrupt(ptport, packet[2], 0);
409 serio_interrupt(ptport, packet[1], 0);
412 static void synaptics_pt_activate(struct psmouse *psmouse)
414 struct synaptics_data *priv = psmouse->private;
415 struct psmouse *child = serio_get_drvdata(priv->pt_port);
417 /* adjust the touchpad to child's choice of protocol */
419 if (child->pktsize == 4)
420 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
422 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
424 if (synaptics_mode_cmd(psmouse, priv->mode))
425 psmouse_warn(psmouse,
426 "failed to switch guest protocol\n");
430 static void synaptics_pt_create(struct psmouse *psmouse)
434 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
437 "not enough memory for pass-through port\n");
441 serio->id.type = SERIO_PS_PSTHRU;
442 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
443 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
444 serio->write = synaptics_pt_write;
445 serio->start = synaptics_pt_start;
446 serio->stop = synaptics_pt_stop;
447 serio->parent = psmouse->ps2dev.serio;
449 psmouse->pt_activate = synaptics_pt_activate;
451 psmouse_info(psmouse, "serio: %s port at %s\n",
452 serio->name, psmouse->phys);
453 serio_register_port(serio);
456 /*****************************************************************************
457 * Functions to interpret the absolute mode packets
458 ****************************************************************************/
460 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
463 state->count = count;
468 static void synaptics_parse_agm(const unsigned char buf[],
469 struct synaptics_data *priv,
470 struct synaptics_hw_state *hw)
472 struct synaptics_hw_state *agm = &priv->agm;
475 agm_packet_type = (buf[5] & 0x30) >> 4;
476 switch (agm_packet_type) {
478 /* Gesture packet: (x, y, z) half resolution */
480 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
481 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
482 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
486 /* AGM-CONTACT packet: (count, sgm, agm) */
487 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
494 /* Record that at least one AGM has been received since last SGM */
495 priv->agm_pending = true;
498 static int synaptics_parse_hw_state(const unsigned char buf[],
499 struct synaptics_data *priv,
500 struct synaptics_hw_state *hw)
502 memset(hw, 0, sizeof(struct synaptics_hw_state));
504 if (SYN_MODEL_NEWABS(priv->model_id)) {
505 hw->w = (((buf[0] & 0x30) >> 2) |
506 ((buf[0] & 0x04) >> 1) |
507 ((buf[3] & 0x04) >> 2));
509 hw->left = (buf[0] & 0x01) ? 1 : 0;
510 hw->right = (buf[0] & 0x02) ? 1 : 0;
512 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
514 * Clickpad's button is transmitted as middle button,
515 * however, since it is primary button, we will report
518 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
520 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
521 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
523 hw->scroll = (signed char)(buf[1]);
526 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
527 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
528 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
531 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
532 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
534 synaptics_parse_agm(buf, priv, hw);
538 hw->x = (((buf[3] & 0x10) << 8) |
539 ((buf[1] & 0x0f) << 8) |
541 hw->y = (((buf[3] & 0x20) << 7) |
542 ((buf[1] & 0xf0) << 4) |
546 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
547 ((buf[0] ^ buf[3]) & 0x02)) {
548 switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
551 * if nExtBtn is greater than 8 it should be
552 * considered invalid and treated as 0
556 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
557 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
559 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
560 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
562 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
563 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
565 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
566 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
570 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
571 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
573 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
574 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
576 hw->left = (buf[0] & 0x01) ? 1 : 0;
577 hw->right = (buf[0] & 0x02) ? 1 : 0;
581 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
582 * is used by some firmware to indicate a finger at the edge of
583 * the touchpad whose precise position cannot be determined, so
584 * convert these values to the maximum axis value.
586 if (hw->x > X_MAX_POSITIVE)
587 hw->x -= 1 << ABS_POS_BITS;
588 else if (hw->x == X_MAX_POSITIVE)
591 if (hw->y > Y_MAX_POSITIVE)
592 hw->y -= 1 << ABS_POS_BITS;
593 else if (hw->y == Y_MAX_POSITIVE)
599 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
600 bool active, int x, int y)
602 input_mt_slot(dev, slot);
603 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
605 input_report_abs(dev, ABS_MT_POSITION_X, x);
606 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
610 static void synaptics_report_semi_mt_data(struct input_dev *dev,
611 const struct synaptics_hw_state *a,
612 const struct synaptics_hw_state *b,
615 if (num_fingers >= 2) {
616 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
618 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
620 } else if (num_fingers == 1) {
621 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
622 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
624 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
625 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
629 static void synaptics_report_buttons(struct psmouse *psmouse,
630 const struct synaptics_hw_state *hw)
632 struct input_dev *dev = psmouse->dev;
633 struct synaptics_data *priv = psmouse->private;
636 input_report_key(dev, BTN_LEFT, hw->left);
637 input_report_key(dev, BTN_RIGHT, hw->right);
639 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
640 input_report_key(dev, BTN_MIDDLE, hw->middle);
642 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
643 input_report_key(dev, BTN_FORWARD, hw->up);
644 input_report_key(dev, BTN_BACK, hw->down);
647 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
648 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
651 static void synaptics_report_slot(struct input_dev *dev, int slot,
652 const struct synaptics_hw_state *hw)
654 input_mt_slot(dev, slot);
655 input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
659 input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
660 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
661 input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
664 static void synaptics_report_mt_data(struct psmouse *psmouse,
665 struct synaptics_mt_state *mt_state,
666 const struct synaptics_hw_state *sgm)
668 struct input_dev *dev = psmouse->dev;
669 struct synaptics_data *priv = psmouse->private;
670 struct synaptics_hw_state *agm = &priv->agm;
671 struct synaptics_mt_state *old = &priv->mt_state;
673 switch (mt_state->count) {
675 synaptics_report_slot(dev, 0, NULL);
676 synaptics_report_slot(dev, 1, NULL);
679 if (mt_state->sgm == -1) {
680 synaptics_report_slot(dev, 0, NULL);
681 synaptics_report_slot(dev, 1, NULL);
682 } else if (mt_state->sgm == 0) {
683 synaptics_report_slot(dev, 0, sgm);
684 synaptics_report_slot(dev, 1, NULL);
686 synaptics_report_slot(dev, 0, NULL);
687 synaptics_report_slot(dev, 1, sgm);
692 * If the finger slot contained in SGM is valid, and either
693 * hasn't changed, or is new, then report SGM in MTB slot 0.
694 * Otherwise, empty MTB slot 0.
696 if (mt_state->sgm != -1 &&
697 (mt_state->sgm == old->sgm || old->sgm == -1))
698 synaptics_report_slot(dev, 0, sgm);
700 synaptics_report_slot(dev, 0, NULL);
703 * If the finger slot contained in AGM is valid, and either
704 * hasn't changed, or is new, then report AGM in MTB slot 1.
705 * Otherwise, empty MTB slot 1.
707 if (mt_state->agm != -1 &&
708 (mt_state->agm == old->agm || old->agm == -1))
709 synaptics_report_slot(dev, 1, agm);
711 synaptics_report_slot(dev, 1, NULL);
715 /* Don't use active slot count to generate BTN_TOOL events. */
716 input_mt_report_pointer_emulation(dev, false);
718 /* Send the number of fingers reported by touchpad itself. */
719 input_mt_report_finger_count(dev, mt_state->count);
721 synaptics_report_buttons(psmouse, sgm);
726 /* Handle case where mt_state->count = 0 */
727 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
728 struct synaptics_mt_state *mt_state)
730 synaptics_mt_state_set(mt_state, 0, -1, -1);
731 priv->mt_state_lost = false;
734 /* Handle case where mt_state->count = 1 */
735 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
736 struct synaptics_mt_state *mt_state)
738 struct synaptics_hw_state *agm = &priv->agm;
739 struct synaptics_mt_state *old = &priv->mt_state;
742 * If the last AGM was (0,0,0), and there is only one finger left,
743 * then we absolutely know that SGM contains slot 0, and all other
744 * fingers have been removed.
746 if (priv->agm_pending && agm->z == 0) {
747 synaptics_mt_state_set(mt_state, 1, 0, -1);
748 priv->mt_state_lost = false;
752 switch (old->count) {
754 synaptics_mt_state_set(mt_state, 1, 0, -1);
758 * If mt_state_lost, then the previous transition was 3->1,
759 * and SGM now contains either slot 0 or 1, but we don't know
760 * which. So, we just assume that the SGM now contains slot 1.
762 * If pending AGM and either:
763 * (a) the previous SGM slot contains slot 0, or
764 * (b) there was no SGM slot
765 * then, the SGM now contains slot 1
767 * Case (a) happens with very rapid "drum roll" gestures, where
768 * slot 0 finger is lifted and a new slot 1 finger touches
769 * within one reporting interval.
771 * Case (b) happens if initially two or more fingers tap
772 * briefly, and all but one lift before the end of the first
773 * reporting interval.
775 * (In both these cases, slot 0 will becomes empty, so SGM
776 * contains slot 1 with the new finger)
778 * Else, if there was no previous SGM, it now contains slot 0.
780 * Otherwise, SGM still contains the same slot.
782 if (priv->mt_state_lost ||
783 (priv->agm_pending && old->sgm <= 0))
784 synaptics_mt_state_set(mt_state, 1, 1, -1);
785 else if (old->sgm == -1)
786 synaptics_mt_state_set(mt_state, 1, 0, -1);
790 * If mt_state_lost, we don't know which finger SGM contains.
792 * So, report 1 finger, but with both slots empty.
793 * We will use slot 1 on subsequent 1->1
795 if (priv->mt_state_lost) {
796 synaptics_mt_state_set(mt_state, 1, -1, -1);
800 * Since the last AGM was NOT (0,0,0), it was the finger in
801 * slot 0 that has been removed.
802 * So, SGM now contains previous AGM's slot, and AGM is now
805 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
809 * Since last AGM was not (0,0,0), we don't know which finger
812 * So, report 1 finger, but with both slots empty.
813 * We will use slot 1 on subsequent 1->1
815 synaptics_mt_state_set(mt_state, 1, -1, -1);
816 priv->mt_state_lost = true;
820 /* mt_state was updated by AGM-CONTACT packet */
825 /* Handle case where mt_state->count = 2 */
826 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
827 struct synaptics_mt_state *mt_state)
829 struct synaptics_mt_state *old = &priv->mt_state;
831 switch (old->count) {
833 synaptics_mt_state_set(mt_state, 2, 0, 1);
837 * If previous SGM contained slot 1 or higher, SGM now contains
838 * slot 0 (the newly touching finger) and AGM contains SGM's
841 * Otherwise, SGM still contains slot 0 and AGM now contains
845 synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
847 synaptics_mt_state_set(mt_state, 2, 0, 1);
851 * If mt_state_lost, SGM now contains either finger 1 or 2, but
852 * we don't know which.
853 * So, we just assume that the SGM contains slot 0 and AGM 1.
855 if (priv->mt_state_lost)
856 synaptics_mt_state_set(mt_state, 2, 0, 1);
858 * Otherwise, use the same mt_state, since it either hasn't
859 * changed, or was updated by a recently received AGM-CONTACT
865 * 3->2 transitions have two unsolvable problems:
866 * 1) no indication is given which finger was removed
867 * 2) no way to tell if agm packet was for finger 3
868 * before 3->2, or finger 2 after 3->2.
870 * So, report 2 fingers, but empty all slots.
871 * We will guess slots [0,1] on subsequent 2->2.
873 synaptics_mt_state_set(mt_state, 2, -1, -1);
874 priv->mt_state_lost = true;
878 /* mt_state was updated by AGM-CONTACT packet */
883 /* Handle case where mt_state->count = 3 */
884 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
885 struct synaptics_mt_state *mt_state)
887 struct synaptics_mt_state *old = &priv->mt_state;
889 switch (old->count) {
891 synaptics_mt_state_set(mt_state, 3, 0, 2);
895 * If previous SGM contained slot 2 or higher, SGM now contains
896 * slot 0 (one of the newly touching fingers) and AGM contains
897 * SGM's previous slot.
899 * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
902 synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
904 synaptics_mt_state_set(mt_state, 3, 0, 2);
908 * If the AGM previously contained slot 3 or higher, then the
909 * newly touching finger is in the lowest available slot.
911 * If SGM was previously 1 or higher, then the new SGM is
912 * now slot 0 (with a new finger), otherwise, the new finger
913 * is now in a hidden slot between 0 and AGM's slot.
915 * In all such cases, the SGM now contains slot 0, and the AGM
916 * continues to contain the same slot as before.
919 synaptics_mt_state_set(mt_state, 3, 0, old->agm);
924 * After some 3->1 and all 3->2 transitions, we lose track
925 * of which slot is reported by SGM and AGM.
927 * For 2->3 in this state, report 3 fingers, but empty all
928 * slots, and we will guess (0,2) on a subsequent 0->3.
930 * To userspace, the resulting transition will look like:
931 * 2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
933 if (priv->mt_state_lost) {
934 synaptics_mt_state_set(mt_state, 3, -1, -1);
939 * If the (SGM,AGM) really previously contained slots (0, 1),
940 * then we cannot know what slot was just reported by the AGM,
941 * because the 2->3 transition can occur either before or after
942 * the AGM packet. Thus, this most recent AGM could contain
943 * either the same old slot 1 or the new slot 2.
944 * Subsequent AGMs will be reporting slot 2.
946 * To userspace, the resulting transition will look like:
947 * 2:[0,1] -> 3:[0,-1] -> 3:[0,2]
949 synaptics_mt_state_set(mt_state, 3, 0, -1);
953 * If, for whatever reason, the previous agm was invalid,
954 * Assume SGM now contains slot 0, AGM now contains slot 2.
957 synaptics_mt_state_set(mt_state, 3, 0, 2);
959 * mt_state either hasn't changed, or was updated by a recently
960 * received AGM-CONTACT packet.
966 /* mt_state was updated by AGM-CONTACT packet */
971 /* Handle case where mt_state->count = 4, or = 5 */
972 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
973 struct synaptics_mt_state *mt_state)
975 /* mt_state was updated correctly by AGM-CONTACT packet */
976 priv->mt_state_lost = false;
979 static void synaptics_image_sensor_process(struct psmouse *psmouse,
980 struct synaptics_hw_state *sgm)
982 struct synaptics_data *priv = psmouse->private;
983 struct synaptics_hw_state *agm = &priv->agm;
984 struct synaptics_mt_state mt_state;
986 /* Initialize using current mt_state (as updated by last agm) */
987 mt_state = agm->mt_state;
990 * Update mt_state using the new finger count and current mt_state.
993 synaptics_image_sensor_0f(priv, &mt_state);
994 else if (sgm->w >= 4)
995 synaptics_image_sensor_1f(priv, &mt_state);
996 else if (sgm->w == 0)
997 synaptics_image_sensor_2f(priv, &mt_state);
998 else if (sgm->w == 1 && mt_state.count <= 3)
999 synaptics_image_sensor_3f(priv, &mt_state);
1001 synaptics_image_sensor_45f(priv, &mt_state);
1003 /* Send resulting input events to user space */
1004 synaptics_report_mt_data(psmouse, &mt_state, sgm);
1006 /* Store updated mt_state */
1007 priv->mt_state = agm->mt_state = mt_state;
1008 priv->agm_pending = false;
1012 * called for each full received packet from the touchpad
1014 static void synaptics_process_packet(struct psmouse *psmouse)
1016 struct input_dev *dev = psmouse->dev;
1017 struct synaptics_data *priv = psmouse->private;
1018 struct synaptics_hw_state hw;
1022 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1025 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1026 synaptics_image_sensor_process(psmouse, &hw);
1031 priv->scroll += hw.scroll;
1033 while (priv->scroll >= 4) {
1034 input_report_key(dev, BTN_BACK, !hw.down);
1036 input_report_key(dev, BTN_BACK, hw.down);
1040 while (priv->scroll <= -4) {
1041 input_report_key(dev, BTN_FORWARD, !hw.up);
1043 input_report_key(dev, BTN_FORWARD, hw.up);
1050 if (hw.z > 0 && hw.x > 1) {
1053 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1056 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1057 num_fingers = hw.w + 2;
1060 if (SYN_MODEL_PEN(priv->model_id))
1061 ; /* Nothing, treat a pen as a single finger */
1064 if (SYN_CAP_PALMDETECT(priv->capabilities))
1065 finger_width = hw.w;
1074 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1075 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1079 * BTN_TOUCH has to be first as mousedev relies on it when doing
1080 * absolute -> relative conversion
1082 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1083 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1085 if (num_fingers > 0) {
1086 input_report_abs(dev, ABS_X, hw.x);
1087 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1089 input_report_abs(dev, ABS_PRESSURE, hw.z);
1091 if (SYN_CAP_PALMDETECT(priv->capabilities))
1092 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1094 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1095 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1096 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1097 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1100 synaptics_report_buttons(psmouse, &hw);
1105 static int synaptics_validate_byte(struct psmouse *psmouse,
1106 int idx, unsigned char pkt_type)
1108 static const unsigned char newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1109 static const unsigned char newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1110 static const unsigned char newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1111 static const unsigned char oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1112 static const unsigned char oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1113 const char *packet = psmouse->packet;
1115 if (idx < 0 || idx > 4)
1121 case SYN_NEWABS_RELAXED:
1122 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1124 case SYN_NEWABS_STRICT:
1125 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1128 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1131 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1136 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1140 for (i = 0; i < 5; i++)
1141 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1142 psmouse_info(psmouse, "using relaxed packet validation\n");
1143 return SYN_NEWABS_RELAXED;
1146 return SYN_NEWABS_STRICT;
1149 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1151 struct synaptics_data *priv = psmouse->private;
1153 if (psmouse->pktcnt >= 6) { /* Full packet received */
1154 if (unlikely(priv->pkt_type == SYN_NEWABS))
1155 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1157 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1158 synaptics_is_pt_packet(psmouse->packet)) {
1160 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1162 synaptics_process_packet(psmouse);
1164 return PSMOUSE_FULL_PACKET;
1167 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1168 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1171 /*****************************************************************************
1172 * Driver initialization/cleanup functions
1173 ****************************************************************************/
1174 static void set_abs_position_params(struct input_dev *dev,
1175 struct synaptics_data *priv, int x_code,
1178 int x_min = priv->x_min ?: XMIN_NOMINAL;
1179 int x_max = priv->x_max ?: XMAX_NOMINAL;
1180 int y_min = priv->y_min ?: YMIN_NOMINAL;
1181 int y_max = priv->y_max ?: YMAX_NOMINAL;
1182 int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1183 SYN_REDUCED_FILTER_FUZZ : 0;
1185 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1186 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1187 input_abs_set_res(dev, x_code, priv->x_res);
1188 input_abs_set_res(dev, y_code, priv->y_res);
1191 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
1195 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1197 __set_bit(EV_ABS, dev->evbit);
1198 set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1199 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1201 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1202 input_mt_init_slots(dev, 2);
1203 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1205 /* Image sensors can report per-contact pressure */
1206 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1208 /* Image sensors can signal 4 and 5 finger clicks */
1209 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1210 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1211 } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1212 /* Non-image sensors with AGM use semi-mt */
1213 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1214 input_mt_init_slots(dev, 2);
1215 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1219 if (SYN_CAP_PALMDETECT(priv->capabilities))
1220 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1222 __set_bit(EV_KEY, dev->evbit);
1223 __set_bit(BTN_TOUCH, dev->keybit);
1224 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1225 __set_bit(BTN_LEFT, dev->keybit);
1226 __set_bit(BTN_RIGHT, dev->keybit);
1228 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1229 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1230 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1233 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1234 __set_bit(BTN_MIDDLE, dev->keybit);
1236 if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1237 SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1238 __set_bit(BTN_FORWARD, dev->keybit);
1239 __set_bit(BTN_BACK, dev->keybit);
1242 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1243 __set_bit(BTN_0 + i, dev->keybit);
1245 __clear_bit(EV_REL, dev->evbit);
1246 __clear_bit(REL_X, dev->relbit);
1247 __clear_bit(REL_Y, dev->relbit);
1249 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1250 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1251 /* Clickpads report only left button */
1252 __clear_bit(BTN_RIGHT, dev->keybit);
1253 __clear_bit(BTN_MIDDLE, dev->keybit);
1257 static void synaptics_disconnect(struct psmouse *psmouse)
1259 synaptics_reset(psmouse);
1260 kfree(psmouse->private);
1261 psmouse->private = NULL;
1264 static int synaptics_reconnect(struct psmouse *psmouse)
1266 struct synaptics_data *priv = psmouse->private;
1267 struct synaptics_data old_priv = *priv;
1272 psmouse_reset(psmouse);
1275 * On some boxes, right after resuming, the touchpad
1276 * needs some time to finish initializing (I assume
1277 * it needs time to calibrate) and start responding
1278 * to Synaptics-specific queries, so let's wait a
1283 error = synaptics_detect(psmouse, 0);
1284 } while (error && ++retry < 3);
1290 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1292 if (synaptics_query_hardware(psmouse)) {
1293 psmouse_err(psmouse, "Unable to query device.\n");
1297 if (synaptics_set_absolute_mode(psmouse)) {
1298 psmouse_err(psmouse, "Unable to initialize device.\n");
1302 if (synaptics_set_advanced_gesture_mode(psmouse)) {
1303 psmouse_err(psmouse,
1304 "Advanced gesture mode reconnect failed.\n");
1308 if (old_priv.identity != priv->identity ||
1309 old_priv.model_id != priv->model_id ||
1310 old_priv.capabilities != priv->capabilities ||
1311 old_priv.ext_cap != priv->ext_cap) {
1312 psmouse_err(psmouse,
1313 "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1314 old_priv.identity, priv->identity,
1315 old_priv.model_id, priv->model_id,
1316 old_priv.capabilities, priv->capabilities,
1317 old_priv.ext_cap, priv->ext_cap);
1324 static bool impaired_toshiba_kbc;
1326 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
1327 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1329 /* Toshiba Satellite */
1331 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1332 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1336 /* Toshiba Dynabook */
1338 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1339 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1343 /* Toshiba Portege M300 */
1345 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1346 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1351 /* Toshiba Portege M300 */
1353 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1354 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1355 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1363 static bool broken_olpc_ec;
1365 static const struct dmi_system_id __initconst olpc_dmi_table[] = {
1366 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1368 /* OLPC XO-1 or XO-1.5 */
1370 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1371 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1378 static const struct dmi_system_id min_max_dmi_table[] __initconst = {
1379 #if defined(CONFIG_DMI)
1381 /* Lenovo ThinkPad Helix */
1383 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1384 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"),
1386 .driver_data = (int []){1024, 5052, 2258, 4832},
1389 /* Lenovo ThinkPad X240 */
1391 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1392 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X240"),
1394 .driver_data = (int []){1232, 5710, 1156, 4696},
1397 /* Lenovo ThinkPad Edge E431 */
1399 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1400 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Edge E431"),
1402 .driver_data = (int []){1024, 5022, 2508, 4832},
1405 /* Lenovo ThinkPad T431s */
1407 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1408 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T431"),
1410 .driver_data = (int []){1024, 5112, 2024, 4832},
1413 /* Lenovo ThinkPad T440s */
1415 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1416 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T440"),
1418 .driver_data = (int []){1024, 5112, 2024, 4832},
1421 /* Lenovo ThinkPad L440 */
1423 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1424 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L440"),
1426 .driver_data = (int []){1024, 5112, 2024, 4832},
1429 /* Lenovo ThinkPad T540p */
1431 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1432 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T540"),
1434 .driver_data = (int []){1024, 5056, 2058, 4832},
1437 /* Lenovo ThinkPad L540 */
1439 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1440 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L540"),
1442 .driver_data = (int []){1024, 5112, 2024, 4832},
1445 /* Lenovo ThinkPad W540 */
1447 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1448 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W540"),
1450 .driver_data = (int []){1024, 5112, 2024, 4832},
1453 /* Lenovo Yoga S1 */
1455 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1456 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
1457 "ThinkPad S1 Yoga"),
1459 .driver_data = (int []){1232, 5710, 1156, 4696},
1462 /* Lenovo ThinkPad X1 Carbon Haswell (3rd generation) */
1464 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1465 DMI_MATCH(DMI_PRODUCT_VERSION,
1466 "ThinkPad X1 Carbon 2nd"),
1468 .driver_data = (int []){1024, 5112, 2024, 4832},
1474 void __init synaptics_module_init(void)
1476 const struct dmi_system_id *min_max_dmi;
1478 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1479 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1481 min_max_dmi = dmi_first_match(min_max_dmi_table);
1483 quirk_min_max = min_max_dmi->driver_data;
1486 int synaptics_init(struct psmouse *psmouse)
1488 struct synaptics_data *priv;
1491 * The OLPC XO has issues with Synaptics' absolute mode; similarly to
1492 * the HGPK, it quickly degrades and the hardware becomes jumpy and
1493 * overly sensitive. Not only that, but the constant packet spew
1494 * (even at a lowered 40pps rate) overloads the EC such that key
1495 * presses on the keyboard are missed. Given all of that, don't
1496 * even attempt to use Synaptics mode. Relative mode seems to work
1499 if (broken_olpc_ec) {
1500 psmouse_info(psmouse,
1501 "OLPC XO detected, not enabling Synaptics protocol.\n");
1505 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1509 psmouse_reset(psmouse);
1511 if (synaptics_query_hardware(psmouse)) {
1512 psmouse_err(psmouse, "Unable to query device.\n");
1516 if (synaptics_set_absolute_mode(psmouse)) {
1517 psmouse_err(psmouse, "Unable to initialize device.\n");
1521 if (synaptics_set_advanced_gesture_mode(psmouse)) {
1522 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
1526 priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1528 psmouse_info(psmouse,
1529 "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
1530 SYN_ID_MODEL(priv->identity),
1531 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1533 priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
1535 set_input_params(psmouse->dev, priv);
1538 * Encode touchpad model so that it can be used to set
1539 * input device->id.version and be visible to userspace.
1540 * Because version is __u16 we have to drop something.
1541 * Hardware info bits seem to be good candidates as they
1542 * are documented to be for Synaptics corp. internal use.
1544 psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1545 (priv->model_id & 0x000000ff);
1547 psmouse->protocol_handler = synaptics_process_byte;
1548 psmouse->set_rate = synaptics_set_rate;
1549 psmouse->disconnect = synaptics_disconnect;
1550 psmouse->reconnect = synaptics_reconnect;
1551 psmouse->cleanup = synaptics_reset;
1552 psmouse->pktsize = 6;
1553 /* Synaptics can usually stay in sync without extra help */
1554 psmouse->resync_time = 0;
1556 if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1557 synaptics_pt_create(psmouse);
1560 * Toshiba's KBC seems to have trouble handling data from
1561 * Synaptics at full rate. Switch to a lower rate (roughly
1562 * the same rate as a standard PS/2 mouse).
1564 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1565 psmouse_info(psmouse,
1566 "Toshiba %s detected, limiting rate to 40pps.\n",
1567 dmi_get_system_info(DMI_PRODUCT_NAME));
1578 bool synaptics_supported(void)
1583 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1585 void __init synaptics_module_init(void)
1589 int synaptics_init(struct psmouse *psmouse)
1594 bool synaptics_supported(void)
1599 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */