Loading...
1/*
2 * Synaptics TouchPad PS/2 mouse driver
3 *
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.
7 *
8 * 2003 Peter Osterlund <petero2@telia.com>
9 * Ported to 2.5 input device infrastructure.
10 *
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)
14 *
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)
18 *
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.
22 *
23 * Trademarks are the property of their respective owners.
24 */
25
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>
33#include "psmouse.h"
34#include "synaptics.h"
35
36/*
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
41 * coordinates.
42 */
43#define XMIN 0
44#define XMAX 6143
45#define YMIN 0
46#define YMAX 6143
47#define XMIN_NOMINAL 1472
48#define XMAX_NOMINAL 5472
49#define YMIN_NOMINAL 1408
50#define YMAX_NOMINAL 4448
51
52/* Size in bits of absolute position values reported by the hardware */
53#define ABS_POS_BITS 13
54
55/*
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.
60 *
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.
66 */
67#define X_MAX_POSITIVE 8176
68#define Y_MAX_POSITIVE 8176
69
70/* maximum ABS_MT_POSITION displacement (in mm) */
71#define DMAX 10
72
73/*****************************************************************************
74 * Stuff we need even when we do not want native Synaptics support
75 ****************************************************************************/
76
77/*
78 * Set the synaptics touchpad mode byte by special commands
79 */
80static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
81{
82 unsigned char param[1];
83
84 if (psmouse_sliced_command(psmouse, mode))
85 return -1;
86 param[0] = SYN_PS_SET_MODE2;
87 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
88 return -1;
89 return 0;
90}
91
92int synaptics_detect(struct psmouse *psmouse, bool set_properties)
93{
94 struct ps2dev *ps2dev = &psmouse->ps2dev;
95 unsigned char param[4];
96
97 param[0] = 0;
98
99 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
100 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
101 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
102 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
103 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
104
105 if (param[1] != 0x47)
106 return -ENODEV;
107
108 if (set_properties) {
109 psmouse->vendor = "Synaptics";
110 psmouse->name = "TouchPad";
111 }
112
113 return 0;
114}
115
116void synaptics_reset(struct psmouse *psmouse)
117{
118 /* reset touchpad back to relative mode, gestures enabled */
119 synaptics_mode_cmd(psmouse, 0);
120}
121
122#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
123
124static bool cr48_profile_sensor;
125
126#define ANY_BOARD_ID 0
127struct min_max_quirk {
128 const char * const *pnp_ids;
129 struct {
130 unsigned long int min, max;
131 } board_id;
132 int x_min, x_max, y_min, y_max;
133};
134
135static const struct min_max_quirk min_max_pnpid_table[] = {
136 {
137 (const char * const []){"LEN0033", NULL},
138 {ANY_BOARD_ID, ANY_BOARD_ID},
139 1024, 5052, 2258, 4832
140 },
141 {
142 (const char * const []){"LEN0042", NULL},
143 {ANY_BOARD_ID, ANY_BOARD_ID},
144 1232, 5710, 1156, 4696
145 },
146 {
147 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
148 "LEN0039", "LEN2002", "LEN2004",
149 NULL},
150 {ANY_BOARD_ID, 2961},
151 1024, 5112, 2024, 4832
152 },
153 {
154 (const char * const []){"LEN2000", NULL},
155 {ANY_BOARD_ID, ANY_BOARD_ID},
156 1024, 5113, 2021, 4832
157 },
158 {
159 (const char * const []){"LEN2001", NULL},
160 {ANY_BOARD_ID, ANY_BOARD_ID},
161 1024, 5022, 2508, 4832
162 },
163 {
164 (const char * const []){"LEN2006", NULL},
165 {2691, 2691},
166 1024, 5045, 2457, 4832
167 },
168 {
169 (const char * const []){"LEN2006", NULL},
170 {ANY_BOARD_ID, ANY_BOARD_ID},
171 1264, 5675, 1171, 4688
172 },
173 { }
174};
175
176/* This list has been kindly provided by Synaptics. */
177static const char * const topbuttonpad_pnp_ids[] = {
178 "LEN0017",
179 "LEN0018",
180 "LEN0019",
181 "LEN0023",
182 "LEN002A",
183 "LEN002B",
184 "LEN002C",
185 "LEN002D",
186 "LEN002E",
187 "LEN0033", /* Helix */
188 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
189 "LEN0035", /* X240 */
190 "LEN0036", /* T440 */
191 "LEN0037", /* X1 Carbon 2nd */
192 "LEN0038",
193 "LEN0039", /* T440s */
194 "LEN0041",
195 "LEN0042", /* Yoga */
196 "LEN0045",
197 "LEN0047",
198 "LEN0049",
199 "LEN2000", /* S540 */
200 "LEN2001", /* Edge E431 */
201 "LEN2002", /* Edge E531 */
202 "LEN2003",
203 "LEN2004", /* L440 */
204 "LEN2005",
205 "LEN2006", /* Edge E440/E540 */
206 "LEN2007",
207 "LEN2008",
208 "LEN2009",
209 "LEN200A",
210 "LEN200B",
211 NULL
212};
213
214/* This list has been kindly provided by Synaptics. */
215static const char * const forcepad_pnp_ids[] = {
216 "SYN300D",
217 "SYN3014",
218 NULL
219};
220
221/*****************************************************************************
222 * Synaptics communications functions
223 ****************************************************************************/
224
225/*
226 * Synaptics touchpads report the y coordinate from bottom to top, which is
227 * opposite from what userspace expects.
228 * This function is used to invert y before reporting.
229 */
230static int synaptics_invert_y(int y)
231{
232 return YMAX_NOMINAL + YMIN_NOMINAL - y;
233}
234
235/*
236 * Send a command to the synpatics touchpad by special commands
237 */
238static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
239{
240 if (psmouse_sliced_command(psmouse, c))
241 return -1;
242 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
243 return -1;
244 return 0;
245}
246
247/*
248 * Read the model-id bytes from the touchpad
249 * see also SYN_MODEL_* macros
250 */
251static int synaptics_model_id(struct psmouse *psmouse)
252{
253 struct synaptics_data *priv = psmouse->private;
254 unsigned char mi[3];
255
256 if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
257 return -1;
258 priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
259 return 0;
260}
261
262static int synaptics_more_extended_queries(struct psmouse *psmouse)
263{
264 struct synaptics_data *priv = psmouse->private;
265 unsigned char buf[3];
266
267 if (synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf))
268 return -1;
269
270 priv->ext_cap_10 = (buf[0]<<16) | (buf[1]<<8) | buf[2];
271
272 return 0;
273}
274
275/*
276 * Read the board id and the "More Extended Queries" from the touchpad
277 * The board id is encoded in the "QUERY MODES" response
278 */
279static int synaptics_query_modes(struct psmouse *psmouse)
280{
281 struct synaptics_data *priv = psmouse->private;
282 unsigned char bid[3];
283
284 /* firmwares prior 7.5 have no board_id encoded */
285 if (SYN_ID_FULL(priv->identity) < 0x705)
286 return 0;
287
288 if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
289 return -1;
290 priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
291
292 if (SYN_MEXT_CAP_BIT(bid[0]))
293 return synaptics_more_extended_queries(psmouse);
294
295 return 0;
296}
297
298/*
299 * Read the firmware id from the touchpad
300 */
301static int synaptics_firmware_id(struct psmouse *psmouse)
302{
303 struct synaptics_data *priv = psmouse->private;
304 unsigned char fwid[3];
305
306 if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
307 return -1;
308 priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
309 return 0;
310}
311
312/*
313 * Read the capability-bits from the touchpad
314 * see also the SYN_CAP_* macros
315 */
316static int synaptics_capability(struct psmouse *psmouse)
317{
318 struct synaptics_data *priv = psmouse->private;
319 unsigned char cap[3];
320
321 if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
322 return -1;
323 priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
324 priv->ext_cap = priv->ext_cap_0c = 0;
325
326 /*
327 * Older firmwares had submodel ID fixed to 0x47
328 */
329 if (SYN_ID_FULL(priv->identity) < 0x705 &&
330 SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
331 return -1;
332 }
333
334 /*
335 * Unless capExtended is set the rest of the flags should be ignored
336 */
337 if (!SYN_CAP_EXTENDED(priv->capabilities))
338 priv->capabilities = 0;
339
340 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
341 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
342 psmouse_warn(psmouse,
343 "device claims to have extended capabilities, but I'm not able to read them.\n");
344 } else {
345 priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
346
347 /*
348 * if nExtBtn is greater than 8 it should be considered
349 * invalid and treated as 0
350 */
351 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
352 priv->ext_cap &= 0xff0fff;
353 }
354 }
355
356 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
357 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
358 psmouse_warn(psmouse,
359 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
360 } else {
361 priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
362 }
363 }
364
365 return 0;
366}
367
368/*
369 * Identify Touchpad
370 * See also the SYN_ID_* macros
371 */
372static int synaptics_identify(struct psmouse *psmouse)
373{
374 struct synaptics_data *priv = psmouse->private;
375 unsigned char id[3];
376
377 if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
378 return -1;
379 priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
380 if (SYN_ID_IS_SYNAPTICS(priv->identity))
381 return 0;
382 return -1;
383}
384
385/*
386 * Read touchpad resolution and maximum reported coordinates
387 * Resolution is left zero if touchpad does not support the query
388 */
389
390static int synaptics_resolution(struct psmouse *psmouse)
391{
392 struct synaptics_data *priv = psmouse->private;
393 unsigned char resp[3];
394
395 if (SYN_ID_MAJOR(priv->identity) < 4)
396 return 0;
397
398 if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
399 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
400 priv->x_res = resp[0]; /* x resolution in units/mm */
401 priv->y_res = resp[2]; /* y resolution in units/mm */
402 }
403 }
404
405 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
406 SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
407 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
408 psmouse_warn(psmouse,
409 "device claims to have max coordinates query, but I'm not able to read it.\n");
410 } else {
411 priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
412 priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
413 psmouse_info(psmouse,
414 "queried max coordinates: x [..%d], y [..%d]\n",
415 priv->x_max, priv->y_max);
416 }
417 }
418
419 if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
420 (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
421 /*
422 * Firmware v8.1 does not report proper number of extended
423 * capabilities, but has been proven to report correct min
424 * coordinates.
425 */
426 SYN_ID_FULL(priv->identity) == 0x801)) {
427 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
428 psmouse_warn(psmouse,
429 "device claims to have min coordinates query, but I'm not able to read it.\n");
430 } else {
431 priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
432 priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
433 psmouse_info(psmouse,
434 "queried min coordinates: x [%d..], y [%d..]\n",
435 priv->x_min, priv->y_min);
436 }
437 }
438
439 return 0;
440}
441
442/*
443 * Apply quirk(s) if the hardware matches
444 */
445
446static void synaptics_apply_quirks(struct psmouse *psmouse)
447{
448 struct synaptics_data *priv = psmouse->private;
449 int i;
450
451 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
452 if (!psmouse_matches_pnp_id(psmouse,
453 min_max_pnpid_table[i].pnp_ids))
454 continue;
455
456 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
457 priv->board_id < min_max_pnpid_table[i].board_id.min)
458 continue;
459
460 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
461 priv->board_id > min_max_pnpid_table[i].board_id.max)
462 continue;
463
464 priv->x_min = min_max_pnpid_table[i].x_min;
465 priv->x_max = min_max_pnpid_table[i].x_max;
466 priv->y_min = min_max_pnpid_table[i].y_min;
467 priv->y_max = min_max_pnpid_table[i].y_max;
468 psmouse_info(psmouse,
469 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
470 priv->x_min, priv->x_max,
471 priv->y_min, priv->y_max);
472 break;
473 }
474}
475
476static int synaptics_query_hardware(struct psmouse *psmouse)
477{
478 if (synaptics_identify(psmouse))
479 return -1;
480 if (synaptics_model_id(psmouse))
481 return -1;
482 if (synaptics_firmware_id(psmouse))
483 return -1;
484 if (synaptics_query_modes(psmouse))
485 return -1;
486 if (synaptics_capability(psmouse))
487 return -1;
488 if (synaptics_resolution(psmouse))
489 return -1;
490
491 synaptics_apply_quirks(psmouse);
492
493 return 0;
494}
495
496static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
497{
498 static unsigned char param = 0xc8;
499 struct synaptics_data *priv = psmouse->private;
500
501 if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
502 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
503 return 0;
504
505 if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
506 return -1;
507
508 if (ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE))
509 return -1;
510
511 /* Advanced gesture mode also sends multi finger data */
512 priv->capabilities |= BIT(1);
513
514 return 0;
515}
516
517static int synaptics_set_mode(struct psmouse *psmouse)
518{
519 struct synaptics_data *priv = psmouse->private;
520
521 priv->mode = 0;
522 if (priv->absolute_mode)
523 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
524 if (priv->disable_gesture)
525 priv->mode |= SYN_BIT_DISABLE_GESTURE;
526 if (psmouse->rate >= 80)
527 priv->mode |= SYN_BIT_HIGH_RATE;
528 if (SYN_CAP_EXTENDED(priv->capabilities))
529 priv->mode |= SYN_BIT_W_MODE;
530
531 if (synaptics_mode_cmd(psmouse, priv->mode))
532 return -1;
533
534 if (priv->absolute_mode &&
535 synaptics_set_advanced_gesture_mode(psmouse)) {
536 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
537 return -1;
538 }
539
540 return 0;
541}
542
543static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
544{
545 struct synaptics_data *priv = psmouse->private;
546
547 if (rate >= 80) {
548 priv->mode |= SYN_BIT_HIGH_RATE;
549 psmouse->rate = 80;
550 } else {
551 priv->mode &= ~SYN_BIT_HIGH_RATE;
552 psmouse->rate = 40;
553 }
554
555 synaptics_mode_cmd(psmouse, priv->mode);
556}
557
558/*****************************************************************************
559 * Synaptics pass-through PS/2 port support
560 ****************************************************************************/
561static int synaptics_pt_write(struct serio *serio, unsigned char c)
562{
563 struct psmouse *parent = serio_get_drvdata(serio->parent);
564 char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
565
566 if (psmouse_sliced_command(parent, c))
567 return -1;
568 if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
569 return -1;
570 return 0;
571}
572
573static int synaptics_pt_start(struct serio *serio)
574{
575 struct psmouse *parent = serio_get_drvdata(serio->parent);
576 struct synaptics_data *priv = parent->private;
577
578 serio_pause_rx(parent->ps2dev.serio);
579 priv->pt_port = serio;
580 serio_continue_rx(parent->ps2dev.serio);
581
582 return 0;
583}
584
585static void synaptics_pt_stop(struct serio *serio)
586{
587 struct psmouse *parent = serio_get_drvdata(serio->parent);
588 struct synaptics_data *priv = parent->private;
589
590 serio_pause_rx(parent->ps2dev.serio);
591 priv->pt_port = NULL;
592 serio_continue_rx(parent->ps2dev.serio);
593}
594
595static int synaptics_is_pt_packet(unsigned char *buf)
596{
597 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
598}
599
600static void synaptics_pass_pt_packet(struct psmouse *psmouse,
601 struct serio *ptport,
602 unsigned char *packet)
603{
604 struct synaptics_data *priv = psmouse->private;
605 struct psmouse *child = serio_get_drvdata(ptport);
606
607 if (child && child->state == PSMOUSE_ACTIVATED) {
608 serio_interrupt(ptport, packet[1] | priv->pt_buttons, 0);
609 serio_interrupt(ptport, packet[4], 0);
610 serio_interrupt(ptport, packet[5], 0);
611 if (child->pktsize == 4)
612 serio_interrupt(ptport, packet[2], 0);
613 } else {
614 serio_interrupt(ptport, packet[1], 0);
615 }
616}
617
618static void synaptics_pt_activate(struct psmouse *psmouse)
619{
620 struct synaptics_data *priv = psmouse->private;
621 struct psmouse *child = serio_get_drvdata(priv->pt_port);
622
623 /* adjust the touchpad to child's choice of protocol */
624 if (child) {
625 if (child->pktsize == 4)
626 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
627 else
628 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
629
630 if (synaptics_mode_cmd(psmouse, priv->mode))
631 psmouse_warn(psmouse,
632 "failed to switch guest protocol\n");
633 }
634}
635
636static void synaptics_pt_create(struct psmouse *psmouse)
637{
638 struct serio *serio;
639
640 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
641 if (!serio) {
642 psmouse_err(psmouse,
643 "not enough memory for pass-through port\n");
644 return;
645 }
646
647 serio->id.type = SERIO_PS_PSTHRU;
648 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
649 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
650 serio->write = synaptics_pt_write;
651 serio->start = synaptics_pt_start;
652 serio->stop = synaptics_pt_stop;
653 serio->parent = psmouse->ps2dev.serio;
654
655 psmouse->pt_activate = synaptics_pt_activate;
656
657 psmouse_info(psmouse, "serio: %s port at %s\n",
658 serio->name, psmouse->phys);
659 serio_register_port(serio);
660}
661
662/*****************************************************************************
663 * Functions to interpret the absolute mode packets
664 ****************************************************************************/
665
666static void synaptics_parse_agm(const unsigned char buf[],
667 struct synaptics_data *priv,
668 struct synaptics_hw_state *hw)
669{
670 struct synaptics_hw_state *agm = &priv->agm;
671 int agm_packet_type;
672
673 agm_packet_type = (buf[5] & 0x30) >> 4;
674 switch (agm_packet_type) {
675 case 1:
676 /* Gesture packet: (x, y, z) half resolution */
677 agm->w = hw->w;
678 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
679 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
680 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
681 break;
682
683 case 2:
684 /* AGM-CONTACT packet: we are only interested in the count */
685 priv->agm_count = buf[1];
686 break;
687
688 default:
689 break;
690 }
691}
692
693static void synaptics_parse_ext_buttons(const unsigned char buf[],
694 struct synaptics_data *priv,
695 struct synaptics_hw_state *hw)
696{
697 unsigned int ext_bits =
698 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
699 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
700
701 hw->ext_buttons = buf[4] & ext_mask;
702 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
703}
704
705static int synaptics_parse_hw_state(const unsigned char buf[],
706 struct synaptics_data *priv,
707 struct synaptics_hw_state *hw)
708{
709 memset(hw, 0, sizeof(struct synaptics_hw_state));
710
711 if (SYN_MODEL_NEWABS(priv->model_id)) {
712 hw->w = (((buf[0] & 0x30) >> 2) |
713 ((buf[0] & 0x04) >> 1) |
714 ((buf[3] & 0x04) >> 2));
715
716 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
717 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
718 hw->w == 2) {
719 synaptics_parse_agm(buf, priv, hw);
720 return 1;
721 }
722
723 hw->x = (((buf[3] & 0x10) << 8) |
724 ((buf[1] & 0x0f) << 8) |
725 buf[4]);
726 hw->y = (((buf[3] & 0x20) << 7) |
727 ((buf[1] & 0xf0) << 4) |
728 buf[5]);
729 hw->z = buf[2];
730
731 hw->left = (buf[0] & 0x01) ? 1 : 0;
732 hw->right = (buf[0] & 0x02) ? 1 : 0;
733
734 if (priv->is_forcepad) {
735 /*
736 * ForcePads, like Clickpads, use middle button
737 * bits to report primary button clicks.
738 * Unfortunately they report primary button not
739 * only when user presses on the pad above certain
740 * threshold, but also when there are more than one
741 * finger on the touchpad, which interferes with
742 * out multi-finger gestures.
743 */
744 if (hw->z == 0) {
745 /* No contacts */
746 priv->press = priv->report_press = false;
747 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
748 /*
749 * Single-finger touch with pressure above
750 * the threshold. If pressure stays long
751 * enough, we'll start reporting primary
752 * button. We rely on the device continuing
753 * sending data even if finger does not
754 * move.
755 */
756 if (!priv->press) {
757 priv->press_start = jiffies;
758 priv->press = true;
759 } else if (time_after(jiffies,
760 priv->press_start +
761 msecs_to_jiffies(50))) {
762 priv->report_press = true;
763 }
764 } else {
765 priv->press = false;
766 }
767
768 hw->left = priv->report_press;
769
770 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
771 /*
772 * Clickpad's button is transmitted as middle button,
773 * however, since it is primary button, we will report
774 * it as BTN_LEFT.
775 */
776 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
777
778 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
779 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
780 if (hw->w == 2)
781 hw->scroll = (signed char)(buf[1]);
782 }
783
784 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
785 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
786 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
787 }
788
789 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
790 ((buf[0] ^ buf[3]) & 0x02)) {
791 synaptics_parse_ext_buttons(buf, priv, hw);
792 }
793 } else {
794 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
795 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
796
797 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
798 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
799
800 hw->left = (buf[0] & 0x01) ? 1 : 0;
801 hw->right = (buf[0] & 0x02) ? 1 : 0;
802 }
803
804 /*
805 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
806 * is used by some firmware to indicate a finger at the edge of
807 * the touchpad whose precise position cannot be determined, so
808 * convert these values to the maximum axis value.
809 */
810 if (hw->x > X_MAX_POSITIVE)
811 hw->x -= 1 << ABS_POS_BITS;
812 else if (hw->x == X_MAX_POSITIVE)
813 hw->x = XMAX;
814
815 if (hw->y > Y_MAX_POSITIVE)
816 hw->y -= 1 << ABS_POS_BITS;
817 else if (hw->y == Y_MAX_POSITIVE)
818 hw->y = YMAX;
819
820 return 0;
821}
822
823static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
824 bool active, int x, int y)
825{
826 input_mt_slot(dev, slot);
827 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
828 if (active) {
829 input_report_abs(dev, ABS_MT_POSITION_X, x);
830 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
831 }
832}
833
834static void synaptics_report_semi_mt_data(struct input_dev *dev,
835 const struct synaptics_hw_state *a,
836 const struct synaptics_hw_state *b,
837 int num_fingers)
838{
839 if (num_fingers >= 2) {
840 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
841 min(a->y, b->y));
842 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
843 max(a->y, b->y));
844 } else if (num_fingers == 1) {
845 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
846 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
847 } else {
848 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
849 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
850 }
851}
852
853static void synaptics_report_ext_buttons(struct psmouse *psmouse,
854 const struct synaptics_hw_state *hw)
855{
856 struct input_dev *dev = psmouse->dev;
857 struct synaptics_data *priv = psmouse->private;
858 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
859 char buf[6] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
860 int i;
861
862 if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
863 return;
864
865 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
866 if ((SYN_ID_FULL(priv->identity) == 0x801 ||
867 SYN_ID_FULL(priv->identity) == 0x802) &&
868 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
869 return;
870
871 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10)) {
872 for (i = 0; i < ext_bits; i++) {
873 input_report_key(dev, BTN_0 + 2 * i,
874 hw->ext_buttons & (1 << i));
875 input_report_key(dev, BTN_1 + 2 * i,
876 hw->ext_buttons & (1 << (i + ext_bits)));
877 }
878 return;
879 }
880
881 /*
882 * This generation of touchpads has the trackstick buttons
883 * physically wired to the touchpad. Re-route them through
884 * the pass-through interface.
885 */
886 if (!priv->pt_port)
887 return;
888
889 /* The trackstick expects at most 3 buttons */
890 priv->pt_buttons = SYN_CAP_EXT_BUTTON_STICK_L(hw->ext_buttons) |
891 SYN_CAP_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
892 SYN_CAP_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
893
894 synaptics_pass_pt_packet(psmouse, priv->pt_port, buf);
895}
896
897static void synaptics_report_buttons(struct psmouse *psmouse,
898 const struct synaptics_hw_state *hw)
899{
900 struct input_dev *dev = psmouse->dev;
901 struct synaptics_data *priv = psmouse->private;
902
903 input_report_key(dev, BTN_LEFT, hw->left);
904 input_report_key(dev, BTN_RIGHT, hw->right);
905
906 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
907 input_report_key(dev, BTN_MIDDLE, hw->middle);
908
909 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
910 input_report_key(dev, BTN_FORWARD, hw->up);
911 input_report_key(dev, BTN_BACK, hw->down);
912 }
913
914 synaptics_report_ext_buttons(psmouse, hw);
915}
916
917static void synaptics_report_mt_data(struct psmouse *psmouse,
918 const struct synaptics_hw_state *sgm,
919 int num_fingers)
920{
921 struct input_dev *dev = psmouse->dev;
922 struct synaptics_data *priv = psmouse->private;
923 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
924 struct input_mt_pos pos[2];
925 int slot[2], nsemi, i;
926
927 nsemi = clamp_val(num_fingers, 0, 2);
928
929 for (i = 0; i < nsemi; i++) {
930 pos[i].x = hw[i]->x;
931 pos[i].y = synaptics_invert_y(hw[i]->y);
932 }
933
934 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->x_res);
935
936 for (i = 0; i < nsemi; i++) {
937 input_mt_slot(dev, slot[i]);
938 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
939 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
940 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
941 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
942 }
943
944 input_mt_drop_unused(dev);
945
946 /* Don't use active slot count to generate BTN_TOOL events. */
947 input_mt_report_pointer_emulation(dev, false);
948
949 /* Send the number of fingers reported by touchpad itself. */
950 input_mt_report_finger_count(dev, num_fingers);
951
952 synaptics_report_buttons(psmouse, sgm);
953
954 input_sync(dev);
955}
956
957static void synaptics_image_sensor_process(struct psmouse *psmouse,
958 struct synaptics_hw_state *sgm)
959{
960 struct synaptics_data *priv = psmouse->private;
961 int num_fingers;
962
963 /*
964 * Update mt_state using the new finger count and current mt_state.
965 */
966 if (sgm->z == 0)
967 num_fingers = 0;
968 else if (sgm->w >= 4)
969 num_fingers = 1;
970 else if (sgm->w == 0)
971 num_fingers = 2;
972 else if (sgm->w == 1)
973 num_fingers = priv->agm_count ? priv->agm_count : 3;
974 else
975 num_fingers = 4;
976
977 /* Send resulting input events to user space */
978 synaptics_report_mt_data(psmouse, sgm, num_fingers);
979}
980
981/*
982 * called for each full received packet from the touchpad
983 */
984static void synaptics_process_packet(struct psmouse *psmouse)
985{
986 struct input_dev *dev = psmouse->dev;
987 struct synaptics_data *priv = psmouse->private;
988 struct synaptics_hw_state hw;
989 int num_fingers;
990 int finger_width;
991
992 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
993 return;
994
995 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
996 synaptics_image_sensor_process(psmouse, &hw);
997 return;
998 }
999
1000 if (hw.scroll) {
1001 priv->scroll += hw.scroll;
1002
1003 while (priv->scroll >= 4) {
1004 input_report_key(dev, BTN_BACK, !hw.down);
1005 input_sync(dev);
1006 input_report_key(dev, BTN_BACK, hw.down);
1007 input_sync(dev);
1008 priv->scroll -= 4;
1009 }
1010 while (priv->scroll <= -4) {
1011 input_report_key(dev, BTN_FORWARD, !hw.up);
1012 input_sync(dev);
1013 input_report_key(dev, BTN_FORWARD, hw.up);
1014 input_sync(dev);
1015 priv->scroll += 4;
1016 }
1017 return;
1018 }
1019
1020 if (hw.z > 0 && hw.x > 1) {
1021 num_fingers = 1;
1022 finger_width = 5;
1023 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1024 switch (hw.w) {
1025 case 0 ... 1:
1026 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1027 num_fingers = hw.w + 2;
1028 break;
1029 case 2:
1030 if (SYN_MODEL_PEN(priv->model_id))
1031 ; /* Nothing, treat a pen as a single finger */
1032 break;
1033 case 4 ... 15:
1034 if (SYN_CAP_PALMDETECT(priv->capabilities))
1035 finger_width = hw.w;
1036 break;
1037 }
1038 }
1039 } else {
1040 num_fingers = 0;
1041 finger_width = 0;
1042 }
1043
1044 if (cr48_profile_sensor) {
1045 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1046 return;
1047 }
1048
1049 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1050 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1051 num_fingers);
1052
1053 /* Post events
1054 * BTN_TOUCH has to be first as mousedev relies on it when doing
1055 * absolute -> relative conversion
1056 */
1057 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1058 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1059
1060 if (num_fingers > 0) {
1061 input_report_abs(dev, ABS_X, hw.x);
1062 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1063 }
1064 input_report_abs(dev, ABS_PRESSURE, hw.z);
1065
1066 if (SYN_CAP_PALMDETECT(priv->capabilities))
1067 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1068
1069 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1070 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1071 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1072 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1073 }
1074
1075 synaptics_report_buttons(psmouse, &hw);
1076
1077 input_sync(dev);
1078}
1079
1080static int synaptics_validate_byte(struct psmouse *psmouse,
1081 int idx, unsigned char pkt_type)
1082{
1083 static const unsigned char newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1084 static const unsigned char newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1085 static const unsigned char newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1086 static const unsigned char oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1087 static const unsigned char oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1088 const char *packet = psmouse->packet;
1089
1090 if (idx < 0 || idx > 4)
1091 return 0;
1092
1093 switch (pkt_type) {
1094
1095 case SYN_NEWABS:
1096 case SYN_NEWABS_RELAXED:
1097 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1098
1099 case SYN_NEWABS_STRICT:
1100 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1101
1102 case SYN_OLDABS:
1103 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1104
1105 default:
1106 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1107 return 0;
1108 }
1109}
1110
1111static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1112{
1113 int i;
1114
1115 for (i = 0; i < 5; i++)
1116 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1117 psmouse_info(psmouse, "using relaxed packet validation\n");
1118 return SYN_NEWABS_RELAXED;
1119 }
1120
1121 return SYN_NEWABS_STRICT;
1122}
1123
1124static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1125{
1126 struct synaptics_data *priv = psmouse->private;
1127
1128 if (psmouse->pktcnt >= 6) { /* Full packet received */
1129 if (unlikely(priv->pkt_type == SYN_NEWABS))
1130 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1131
1132 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1133 synaptics_is_pt_packet(psmouse->packet)) {
1134 if (priv->pt_port)
1135 synaptics_pass_pt_packet(psmouse, priv->pt_port,
1136 psmouse->packet);
1137 } else
1138 synaptics_process_packet(psmouse);
1139
1140 return PSMOUSE_FULL_PACKET;
1141 }
1142
1143 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1144 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1145}
1146
1147/*****************************************************************************
1148 * Driver initialization/cleanup functions
1149 ****************************************************************************/
1150static void set_abs_position_params(struct input_dev *dev,
1151 struct synaptics_data *priv, int x_code,
1152 int y_code)
1153{
1154 int x_min = priv->x_min ?: XMIN_NOMINAL;
1155 int x_max = priv->x_max ?: XMAX_NOMINAL;
1156 int y_min = priv->y_min ?: YMIN_NOMINAL;
1157 int y_max = priv->y_max ?: YMAX_NOMINAL;
1158 int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1159 SYN_REDUCED_FILTER_FUZZ : 0;
1160
1161 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1162 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1163 input_abs_set_res(dev, x_code, priv->x_res);
1164 input_abs_set_res(dev, y_code, priv->y_res);
1165}
1166
1167static void set_input_params(struct psmouse *psmouse,
1168 struct synaptics_data *priv)
1169{
1170 struct input_dev *dev = psmouse->dev;
1171 int i;
1172
1173 /* Things that apply to both modes */
1174 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1175 __set_bit(EV_KEY, dev->evbit);
1176 __set_bit(BTN_LEFT, dev->keybit);
1177 __set_bit(BTN_RIGHT, dev->keybit);
1178
1179 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1180 __set_bit(BTN_MIDDLE, dev->keybit);
1181
1182 if (!priv->absolute_mode) {
1183 /* Relative mode */
1184 __set_bit(EV_REL, dev->evbit);
1185 __set_bit(REL_X, dev->relbit);
1186 __set_bit(REL_Y, dev->relbit);
1187 return;
1188 }
1189
1190 /* Absolute mode */
1191 __set_bit(EV_ABS, dev->evbit);
1192 set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1193 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1194
1195 if (cr48_profile_sensor)
1196 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1197
1198 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1199 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1200 ABS_MT_POSITION_Y);
1201 /* Image sensors can report per-contact pressure */
1202 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1203 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1204
1205 /* Image sensors can signal 4 and 5 finger clicks */
1206 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1207 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1208 } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1209 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1210 ABS_MT_POSITION_Y);
1211 /*
1212 * Profile sensor in CR-48 tracks contacts reasonably well,
1213 * other non-image sensors with AGM use semi-mt.
1214 */
1215 input_mt_init_slots(dev, 2,
1216 INPUT_MT_POINTER |
1217 (cr48_profile_sensor ?
1218 INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1219 }
1220
1221 if (SYN_CAP_PALMDETECT(priv->capabilities))
1222 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1223
1224 __set_bit(BTN_TOUCH, dev->keybit);
1225 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1226
1227 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1228 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1229 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1230 }
1231
1232 if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1233 SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1234 __set_bit(BTN_FORWARD, dev->keybit);
1235 __set_bit(BTN_BACK, dev->keybit);
1236 }
1237
1238 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1239 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1240 __set_bit(BTN_0 + i, dev->keybit);
1241
1242 __clear_bit(EV_REL, dev->evbit);
1243 __clear_bit(REL_X, dev->relbit);
1244 __clear_bit(REL_Y, dev->relbit);
1245
1246 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1247 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1248 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1249 !SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1250 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1251 /* Clickpads report only left button */
1252 __clear_bit(BTN_RIGHT, dev->keybit);
1253 __clear_bit(BTN_MIDDLE, dev->keybit);
1254 }
1255}
1256
1257static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1258 void *data, char *buf)
1259{
1260 struct synaptics_data *priv = psmouse->private;
1261
1262 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1263}
1264
1265static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1266 void *data, const char *buf,
1267 size_t len)
1268{
1269 struct synaptics_data *priv = psmouse->private;
1270 unsigned int value;
1271 int err;
1272
1273 err = kstrtouint(buf, 10, &value);
1274 if (err)
1275 return err;
1276
1277 if (value > 1)
1278 return -EINVAL;
1279
1280 if (value == priv->disable_gesture)
1281 return len;
1282
1283 priv->disable_gesture = value;
1284 if (value)
1285 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1286 else
1287 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1288
1289 if (synaptics_mode_cmd(psmouse, priv->mode))
1290 return -EIO;
1291
1292 return len;
1293}
1294
1295PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1296 synaptics_show_disable_gesture,
1297 synaptics_set_disable_gesture);
1298
1299static void synaptics_disconnect(struct psmouse *psmouse)
1300{
1301 struct synaptics_data *priv = psmouse->private;
1302
1303 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1304 device_remove_file(&psmouse->ps2dev.serio->dev,
1305 &psmouse_attr_disable_gesture.dattr);
1306
1307 synaptics_reset(psmouse);
1308 kfree(priv);
1309 psmouse->private = NULL;
1310}
1311
1312static int synaptics_reconnect(struct psmouse *psmouse)
1313{
1314 struct synaptics_data *priv = psmouse->private;
1315 struct synaptics_data old_priv = *priv;
1316 unsigned char param[2];
1317 int retry = 0;
1318 int error;
1319
1320 do {
1321 psmouse_reset(psmouse);
1322 if (retry) {
1323 /*
1324 * On some boxes, right after resuming, the touchpad
1325 * needs some time to finish initializing (I assume
1326 * it needs time to calibrate) and start responding
1327 * to Synaptics-specific queries, so let's wait a
1328 * bit.
1329 */
1330 ssleep(1);
1331 }
1332 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1333 error = synaptics_detect(psmouse, 0);
1334 } while (error && ++retry < 3);
1335
1336 if (error)
1337 return -1;
1338
1339 if (retry > 1)
1340 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1341
1342 if (synaptics_query_hardware(psmouse)) {
1343 psmouse_err(psmouse, "Unable to query device.\n");
1344 return -1;
1345 }
1346
1347 if (synaptics_set_mode(psmouse)) {
1348 psmouse_err(psmouse, "Unable to initialize device.\n");
1349 return -1;
1350 }
1351
1352 if (old_priv.identity != priv->identity ||
1353 old_priv.model_id != priv->model_id ||
1354 old_priv.capabilities != priv->capabilities ||
1355 old_priv.ext_cap != priv->ext_cap) {
1356 psmouse_err(psmouse,
1357 "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1358 old_priv.identity, priv->identity,
1359 old_priv.model_id, priv->model_id,
1360 old_priv.capabilities, priv->capabilities,
1361 old_priv.ext_cap, priv->ext_cap);
1362 return -1;
1363 }
1364
1365 return 0;
1366}
1367
1368static bool impaired_toshiba_kbc;
1369
1370static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1371#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1372 {
1373 /* Toshiba Satellite */
1374 .matches = {
1375 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1376 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1377 },
1378 },
1379 {
1380 /* Toshiba Dynabook */
1381 .matches = {
1382 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1383 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1384 },
1385 },
1386 {
1387 /* Toshiba Portege M300 */
1388 .matches = {
1389 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1390 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1391 },
1392
1393 },
1394 {
1395 /* Toshiba Portege M300 */
1396 .matches = {
1397 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1398 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1399 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1400 },
1401
1402 },
1403#endif
1404 { }
1405};
1406
1407static bool broken_olpc_ec;
1408
1409static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1410#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1411 {
1412 /* OLPC XO-1 or XO-1.5 */
1413 .matches = {
1414 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1415 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1416 },
1417 },
1418#endif
1419 { }
1420};
1421
1422static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1423#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1424 {
1425 /* Cr-48 Chromebook (Codename Mario) */
1426 .matches = {
1427 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1428 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1429 },
1430 },
1431#endif
1432 { }
1433};
1434
1435void __init synaptics_module_init(void)
1436{
1437 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1438 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1439 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1440}
1441
1442static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1443{
1444 struct synaptics_data *priv;
1445 int err = -1;
1446
1447 /*
1448 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1449 * packet spew overloads the EC such that key presses on the keyboard
1450 * are missed. Given that, don't even attempt to use Absolute mode.
1451 * Relative mode seems to work just fine.
1452 */
1453 if (absolute_mode && broken_olpc_ec) {
1454 psmouse_info(psmouse,
1455 "OLPC XO detected, not enabling Synaptics protocol.\n");
1456 return -ENODEV;
1457 }
1458
1459 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1460 if (!priv)
1461 return -ENOMEM;
1462
1463 psmouse_reset(psmouse);
1464
1465 if (synaptics_query_hardware(psmouse)) {
1466 psmouse_err(psmouse, "Unable to query device.\n");
1467 goto init_fail;
1468 }
1469
1470 priv->absolute_mode = absolute_mode;
1471 if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1472 priv->disable_gesture = true;
1473
1474 /*
1475 * Unfortunately ForcePad capability is not exported over PS/2,
1476 * so we have to resort to checking PNP IDs.
1477 */
1478 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1479
1480 if (synaptics_set_mode(psmouse)) {
1481 psmouse_err(psmouse, "Unable to initialize device.\n");
1482 goto init_fail;
1483 }
1484
1485 priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1486
1487 psmouse_info(psmouse,
1488 "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1489 SYN_ID_MODEL(priv->identity),
1490 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1491 priv->model_id,
1492 priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1493 priv->ext_cap_10, priv->board_id, priv->firmware_id);
1494
1495 set_input_params(psmouse, priv);
1496
1497 /*
1498 * Encode touchpad model so that it can be used to set
1499 * input device->id.version and be visible to userspace.
1500 * Because version is __u16 we have to drop something.
1501 * Hardware info bits seem to be good candidates as they
1502 * are documented to be for Synaptics corp. internal use.
1503 */
1504 psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1505 (priv->model_id & 0x000000ff);
1506
1507 if (absolute_mode) {
1508 psmouse->protocol_handler = synaptics_process_byte;
1509 psmouse->pktsize = 6;
1510 } else {
1511 /* Relative mode follows standard PS/2 mouse protocol */
1512 psmouse->protocol_handler = psmouse_process_byte;
1513 psmouse->pktsize = 3;
1514 }
1515
1516 psmouse->set_rate = synaptics_set_rate;
1517 psmouse->disconnect = synaptics_disconnect;
1518 psmouse->reconnect = synaptics_reconnect;
1519 psmouse->cleanup = synaptics_reset;
1520 /* Synaptics can usually stay in sync without extra help */
1521 psmouse->resync_time = 0;
1522
1523 if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1524 synaptics_pt_create(psmouse);
1525
1526 /*
1527 * Toshiba's KBC seems to have trouble handling data from
1528 * Synaptics at full rate. Switch to a lower rate (roughly
1529 * the same rate as a standard PS/2 mouse).
1530 */
1531 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1532 psmouse_info(psmouse,
1533 "Toshiba %s detected, limiting rate to 40pps.\n",
1534 dmi_get_system_info(DMI_PRODUCT_NAME));
1535 psmouse->rate = 40;
1536 }
1537
1538 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1539 err = device_create_file(&psmouse->ps2dev.serio->dev,
1540 &psmouse_attr_disable_gesture.dattr);
1541 if (err) {
1542 psmouse_err(psmouse,
1543 "Failed to create disable_gesture attribute (%d)",
1544 err);
1545 goto init_fail;
1546 }
1547 }
1548
1549 return 0;
1550
1551 init_fail:
1552 kfree(priv);
1553 return err;
1554}
1555
1556int synaptics_init(struct psmouse *psmouse)
1557{
1558 return __synaptics_init(psmouse, true);
1559}
1560
1561int synaptics_init_relative(struct psmouse *psmouse)
1562{
1563 return __synaptics_init(psmouse, false);
1564}
1565
1566#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1567
1568void __init synaptics_module_init(void)
1569{
1570}
1571
1572int synaptics_init(struct psmouse *psmouse)
1573{
1574 return -ENOSYS;
1575}
1576
1577#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1/*
2 * Synaptics TouchPad PS/2 mouse driver
3 *
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.
7 *
8 * 2003 Peter Osterlund <petero2@telia.com>
9 * Ported to 2.5 input device infrastructure.
10 *
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)
14 *
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)
18 *
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.
22 *
23 * Trademarks are the property of their respective owners.
24 */
25
26#include <linux/module.h>
27#include <linux/dmi.h>
28#include <linux/input/mt.h>
29#include <linux/serio.h>
30#include <linux/libps2.h>
31#include <linux/slab.h>
32#include "psmouse.h"
33#include "synaptics.h"
34
35/*
36 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
37 * section 2.3.2, which says that they should be valid regardless of the
38 * actual size of the sensor.
39 * Note that newer firmware allows querying device for maximum useable
40 * coordinates.
41 */
42#define XMIN_NOMINAL 1472
43#define XMAX_NOMINAL 5472
44#define YMIN_NOMINAL 1408
45#define YMAX_NOMINAL 4448
46
47
48/*****************************************************************************
49 * Stuff we need even when we do not want native Synaptics support
50 ****************************************************************************/
51
52/*
53 * Set the synaptics touchpad mode byte by special commands
54 */
55static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
56{
57 unsigned char param[1];
58
59 if (psmouse_sliced_command(psmouse, mode))
60 return -1;
61 param[0] = SYN_PS_SET_MODE2;
62 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
63 return -1;
64 return 0;
65}
66
67int synaptics_detect(struct psmouse *psmouse, bool set_properties)
68{
69 struct ps2dev *ps2dev = &psmouse->ps2dev;
70 unsigned char param[4];
71
72 param[0] = 0;
73
74 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
75 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
76 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
77 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
78 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
79
80 if (param[1] != 0x47)
81 return -ENODEV;
82
83 if (set_properties) {
84 psmouse->vendor = "Synaptics";
85 psmouse->name = "TouchPad";
86 }
87
88 return 0;
89}
90
91void synaptics_reset(struct psmouse *psmouse)
92{
93 /* reset touchpad back to relative mode, gestures enabled */
94 synaptics_mode_cmd(psmouse, 0);
95}
96
97#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
98
99/*****************************************************************************
100 * Synaptics communications functions
101 ****************************************************************************/
102
103/*
104 * Send a command to the synpatics touchpad by special commands
105 */
106static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
107{
108 if (psmouse_sliced_command(psmouse, c))
109 return -1;
110 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
111 return -1;
112 return 0;
113}
114
115/*
116 * Read the model-id bytes from the touchpad
117 * see also SYN_MODEL_* macros
118 */
119static int synaptics_model_id(struct psmouse *psmouse)
120{
121 struct synaptics_data *priv = psmouse->private;
122 unsigned char mi[3];
123
124 if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
125 return -1;
126 priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
127 return 0;
128}
129
130/*
131 * Read the capability-bits from the touchpad
132 * see also the SYN_CAP_* macros
133 */
134static int synaptics_capability(struct psmouse *psmouse)
135{
136 struct synaptics_data *priv = psmouse->private;
137 unsigned char cap[3];
138
139 if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
140 return -1;
141 priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
142 priv->ext_cap = priv->ext_cap_0c = 0;
143
144 /*
145 * Older firmwares had submodel ID fixed to 0x47
146 */
147 if (SYN_ID_FULL(priv->identity) < 0x705 &&
148 SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
149 return -1;
150 }
151
152 /*
153 * Unless capExtended is set the rest of the flags should be ignored
154 */
155 if (!SYN_CAP_EXTENDED(priv->capabilities))
156 priv->capabilities = 0;
157
158 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
159 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
160 printk(KERN_ERR "Synaptics claims to have extended capabilities,"
161 " but I'm not able to read them.\n");
162 } else {
163 priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
164
165 /*
166 * if nExtBtn is greater than 8 it should be considered
167 * invalid and treated as 0
168 */
169 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
170 priv->ext_cap &= 0xff0fff;
171 }
172 }
173
174 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
175 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
176 printk(KERN_ERR "Synaptics claims to have extended capability 0x0c,"
177 " but I'm not able to read it.\n");
178 } else {
179 priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
180 }
181 }
182
183 return 0;
184}
185
186/*
187 * Identify Touchpad
188 * See also the SYN_ID_* macros
189 */
190static int synaptics_identify(struct psmouse *psmouse)
191{
192 struct synaptics_data *priv = psmouse->private;
193 unsigned char id[3];
194
195 if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
196 return -1;
197 priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
198 if (SYN_ID_IS_SYNAPTICS(priv->identity))
199 return 0;
200 return -1;
201}
202
203/*
204 * Read touchpad resolution and maximum reported coordinates
205 * Resolution is left zero if touchpad does not support the query
206 */
207static int synaptics_resolution(struct psmouse *psmouse)
208{
209 struct synaptics_data *priv = psmouse->private;
210 unsigned char resp[3];
211
212 if (SYN_ID_MAJOR(priv->identity) < 4)
213 return 0;
214
215 if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
216 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
217 priv->x_res = resp[0]; /* x resolution in units/mm */
218 priv->y_res = resp[2]; /* y resolution in units/mm */
219 }
220 }
221
222 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
223 SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
224 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
225 printk(KERN_ERR "Synaptics claims to have max coordinates"
226 " query, but I'm not able to read it.\n");
227 } else {
228 priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
229 priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
230 }
231 }
232
233 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
234 SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
235 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
236 printk(KERN_ERR "Synaptics claims to have min coordinates"
237 " query, but I'm not able to read it.\n");
238 } else {
239 priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
240 priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
241 }
242 }
243
244 return 0;
245}
246
247static int synaptics_query_hardware(struct psmouse *psmouse)
248{
249 if (synaptics_identify(psmouse))
250 return -1;
251 if (synaptics_model_id(psmouse))
252 return -1;
253 if (synaptics_capability(psmouse))
254 return -1;
255 if (synaptics_resolution(psmouse))
256 return -1;
257
258 return 0;
259}
260
261static int synaptics_set_absolute_mode(struct psmouse *psmouse)
262{
263 struct synaptics_data *priv = psmouse->private;
264
265 priv->mode = SYN_BIT_ABSOLUTE_MODE;
266 if (SYN_ID_MAJOR(priv->identity) >= 4)
267 priv->mode |= SYN_BIT_DISABLE_GESTURE;
268 if (SYN_CAP_EXTENDED(priv->capabilities))
269 priv->mode |= SYN_BIT_W_MODE;
270
271 if (synaptics_mode_cmd(psmouse, priv->mode))
272 return -1;
273
274 return 0;
275}
276
277static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
278{
279 struct synaptics_data *priv = psmouse->private;
280
281 if (rate >= 80) {
282 priv->mode |= SYN_BIT_HIGH_RATE;
283 psmouse->rate = 80;
284 } else {
285 priv->mode &= ~SYN_BIT_HIGH_RATE;
286 psmouse->rate = 40;
287 }
288
289 synaptics_mode_cmd(psmouse, priv->mode);
290}
291
292static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
293{
294 static unsigned char param = 0xc8;
295 struct synaptics_data *priv = psmouse->private;
296
297 if (!SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
298 return 0;
299
300 if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
301 return -1;
302 if (ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE))
303 return -1;
304
305 /* Advanced gesture mode also sends multi finger data */
306 priv->capabilities |= BIT(1);
307
308 return 0;
309}
310
311/*****************************************************************************
312 * Synaptics pass-through PS/2 port support
313 ****************************************************************************/
314static int synaptics_pt_write(struct serio *serio, unsigned char c)
315{
316 struct psmouse *parent = serio_get_drvdata(serio->parent);
317 char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
318
319 if (psmouse_sliced_command(parent, c))
320 return -1;
321 if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
322 return -1;
323 return 0;
324}
325
326static int synaptics_pt_start(struct serio *serio)
327{
328 struct psmouse *parent = serio_get_drvdata(serio->parent);
329 struct synaptics_data *priv = parent->private;
330
331 serio_pause_rx(parent->ps2dev.serio);
332 priv->pt_port = serio;
333 serio_continue_rx(parent->ps2dev.serio);
334
335 return 0;
336}
337
338static void synaptics_pt_stop(struct serio *serio)
339{
340 struct psmouse *parent = serio_get_drvdata(serio->parent);
341 struct synaptics_data *priv = parent->private;
342
343 serio_pause_rx(parent->ps2dev.serio);
344 priv->pt_port = NULL;
345 serio_continue_rx(parent->ps2dev.serio);
346}
347
348static int synaptics_is_pt_packet(unsigned char *buf)
349{
350 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
351}
352
353static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
354{
355 struct psmouse *child = serio_get_drvdata(ptport);
356
357 if (child && child->state == PSMOUSE_ACTIVATED) {
358 serio_interrupt(ptport, packet[1], 0);
359 serio_interrupt(ptport, packet[4], 0);
360 serio_interrupt(ptport, packet[5], 0);
361 if (child->pktsize == 4)
362 serio_interrupt(ptport, packet[2], 0);
363 } else
364 serio_interrupt(ptport, packet[1], 0);
365}
366
367static void synaptics_pt_activate(struct psmouse *psmouse)
368{
369 struct synaptics_data *priv = psmouse->private;
370 struct psmouse *child = serio_get_drvdata(priv->pt_port);
371
372 /* adjust the touchpad to child's choice of protocol */
373 if (child) {
374 if (child->pktsize == 4)
375 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
376 else
377 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
378
379 if (synaptics_mode_cmd(psmouse, priv->mode))
380 printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
381 }
382}
383
384static void synaptics_pt_create(struct psmouse *psmouse)
385{
386 struct serio *serio;
387
388 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
389 if (!serio) {
390 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
391 return;
392 }
393
394 serio->id.type = SERIO_PS_PSTHRU;
395 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
396 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
397 serio->write = synaptics_pt_write;
398 serio->start = synaptics_pt_start;
399 serio->stop = synaptics_pt_stop;
400 serio->parent = psmouse->ps2dev.serio;
401
402 psmouse->pt_activate = synaptics_pt_activate;
403
404 printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
405 serio_register_port(serio);
406}
407
408/*****************************************************************************
409 * Functions to interpret the absolute mode packets
410 ****************************************************************************/
411
412static int synaptics_parse_hw_state(const unsigned char buf[],
413 struct synaptics_data *priv,
414 struct synaptics_hw_state *hw)
415{
416 memset(hw, 0, sizeof(struct synaptics_hw_state));
417
418 if (SYN_MODEL_NEWABS(priv->model_id)) {
419 hw->w = (((buf[0] & 0x30) >> 2) |
420 ((buf[0] & 0x04) >> 1) |
421 ((buf[3] & 0x04) >> 2));
422
423 hw->left = (buf[0] & 0x01) ? 1 : 0;
424 hw->right = (buf[0] & 0x02) ? 1 : 0;
425
426 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
427 /*
428 * Clickpad's button is transmitted as middle button,
429 * however, since it is primary button, we will report
430 * it as BTN_LEFT.
431 */
432 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
433
434 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
435 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
436 if (hw->w == 2)
437 hw->scroll = (signed char)(buf[1]);
438 }
439
440 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
441 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
442 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
443 }
444
445 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) && hw->w == 2) {
446 /* Gesture packet: (x, y, z) at half resolution */
447 priv->mt.x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
448 priv->mt.y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
449 priv->mt.z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
450 return 1;
451 }
452
453 hw->x = (((buf[3] & 0x10) << 8) |
454 ((buf[1] & 0x0f) << 8) |
455 buf[4]);
456 hw->y = (((buf[3] & 0x20) << 7) |
457 ((buf[1] & 0xf0) << 4) |
458 buf[5]);
459 hw->z = buf[2];
460
461 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
462 ((buf[0] ^ buf[3]) & 0x02)) {
463 switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
464 default:
465 /*
466 * if nExtBtn is greater than 8 it should be
467 * considered invalid and treated as 0
468 */
469 break;
470 case 8:
471 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
472 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
473 case 6:
474 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
475 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
476 case 4:
477 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
478 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
479 case 2:
480 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
481 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
482 }
483 }
484 } else {
485 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
486 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
487
488 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
489 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
490
491 hw->left = (buf[0] & 0x01) ? 1 : 0;
492 hw->right = (buf[0] & 0x02) ? 1 : 0;
493 }
494
495 return 0;
496}
497
498static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
499 bool active, int x, int y)
500{
501 input_mt_slot(dev, slot);
502 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
503 if (active) {
504 input_report_abs(dev, ABS_MT_POSITION_X, x);
505 input_report_abs(dev, ABS_MT_POSITION_Y,
506 YMAX_NOMINAL + YMIN_NOMINAL - y);
507 }
508}
509
510static void synaptics_report_semi_mt_data(struct input_dev *dev,
511 const struct synaptics_hw_state *a,
512 const struct synaptics_hw_state *b,
513 int num_fingers)
514{
515 if (num_fingers >= 2) {
516 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
517 min(a->y, b->y));
518 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
519 max(a->y, b->y));
520 } else if (num_fingers == 1) {
521 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
522 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
523 } else {
524 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
525 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
526 }
527}
528
529/*
530 * called for each full received packet from the touchpad
531 */
532static void synaptics_process_packet(struct psmouse *psmouse)
533{
534 struct input_dev *dev = psmouse->dev;
535 struct synaptics_data *priv = psmouse->private;
536 struct synaptics_hw_state hw;
537 int num_fingers;
538 int finger_width;
539 int i;
540
541 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
542 return;
543
544 if (hw.scroll) {
545 priv->scroll += hw.scroll;
546
547 while (priv->scroll >= 4) {
548 input_report_key(dev, BTN_BACK, !hw.down);
549 input_sync(dev);
550 input_report_key(dev, BTN_BACK, hw.down);
551 input_sync(dev);
552 priv->scroll -= 4;
553 }
554 while (priv->scroll <= -4) {
555 input_report_key(dev, BTN_FORWARD, !hw.up);
556 input_sync(dev);
557 input_report_key(dev, BTN_FORWARD, hw.up);
558 input_sync(dev);
559 priv->scroll += 4;
560 }
561 return;
562 }
563
564 if (hw.z > 0 && hw.x > 1) {
565 num_fingers = 1;
566 finger_width = 5;
567 if (SYN_CAP_EXTENDED(priv->capabilities)) {
568 switch (hw.w) {
569 case 0 ... 1:
570 if (SYN_CAP_MULTIFINGER(priv->capabilities))
571 num_fingers = hw.w + 2;
572 break;
573 case 2:
574 if (SYN_MODEL_PEN(priv->model_id))
575 ; /* Nothing, treat a pen as a single finger */
576 break;
577 case 4 ... 15:
578 if (SYN_CAP_PALMDETECT(priv->capabilities))
579 finger_width = hw.w;
580 break;
581 }
582 }
583 } else {
584 num_fingers = 0;
585 finger_width = 0;
586 }
587
588 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
589 synaptics_report_semi_mt_data(dev, &hw, &priv->mt, num_fingers);
590
591 /* Post events
592 * BTN_TOUCH has to be first as mousedev relies on it when doing
593 * absolute -> relative conversion
594 */
595 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
596 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
597
598 if (num_fingers > 0) {
599 input_report_abs(dev, ABS_X, hw.x);
600 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
601 }
602 input_report_abs(dev, ABS_PRESSURE, hw.z);
603
604 if (SYN_CAP_PALMDETECT(priv->capabilities))
605 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
606
607 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
608 input_report_key(dev, BTN_LEFT, hw.left);
609 input_report_key(dev, BTN_RIGHT, hw.right);
610
611 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
612 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
613 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
614 }
615
616 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
617 input_report_key(dev, BTN_MIDDLE, hw.middle);
618
619 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
620 input_report_key(dev, BTN_FORWARD, hw.up);
621 input_report_key(dev, BTN_BACK, hw.down);
622 }
623
624 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
625 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
626
627 input_sync(dev);
628}
629
630static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
631{
632 static const unsigned char newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
633 static const unsigned char newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
634 static const unsigned char newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
635 static const unsigned char oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
636 static const unsigned char oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
637
638 if (idx < 0 || idx > 4)
639 return 0;
640
641 switch (pkt_type) {
642
643 case SYN_NEWABS:
644 case SYN_NEWABS_RELAXED:
645 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
646
647 case SYN_NEWABS_STRICT:
648 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
649
650 case SYN_OLDABS:
651 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
652
653 default:
654 printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
655 return 0;
656 }
657}
658
659static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
660{
661 int i;
662
663 for (i = 0; i < 5; i++)
664 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
665 printk(KERN_INFO "synaptics: using relaxed packet validation\n");
666 return SYN_NEWABS_RELAXED;
667 }
668
669 return SYN_NEWABS_STRICT;
670}
671
672static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
673{
674 struct synaptics_data *priv = psmouse->private;
675
676 if (psmouse->pktcnt >= 6) { /* Full packet received */
677 if (unlikely(priv->pkt_type == SYN_NEWABS))
678 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
679
680 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
681 synaptics_is_pt_packet(psmouse->packet)) {
682 if (priv->pt_port)
683 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
684 } else
685 synaptics_process_packet(psmouse);
686
687 return PSMOUSE_FULL_PACKET;
688 }
689
690 return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
691 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
692}
693
694/*****************************************************************************
695 * Driver initialization/cleanup functions
696 ****************************************************************************/
697static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
698{
699 int i;
700 int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
701 SYN_REDUCED_FILTER_FUZZ : 0;
702
703 __set_bit(INPUT_PROP_POINTER, dev->propbit);
704
705 __set_bit(EV_ABS, dev->evbit);
706 input_set_abs_params(dev, ABS_X,
707 priv->x_min ?: XMIN_NOMINAL,
708 priv->x_max ?: XMAX_NOMINAL,
709 fuzz, 0);
710 input_set_abs_params(dev, ABS_Y,
711 priv->y_min ?: YMIN_NOMINAL,
712 priv->y_max ?: YMAX_NOMINAL,
713 fuzz, 0);
714 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
715
716 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
717 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
718 input_mt_init_slots(dev, 2);
719 input_set_abs_params(dev, ABS_MT_POSITION_X,
720 priv->x_min ?: XMIN_NOMINAL,
721 priv->x_max ?: XMAX_NOMINAL,
722 fuzz, 0);
723 input_set_abs_params(dev, ABS_MT_POSITION_Y,
724 priv->y_min ?: YMIN_NOMINAL,
725 priv->y_max ?: YMAX_NOMINAL,
726 fuzz, 0);
727
728 input_abs_set_res(dev, ABS_MT_POSITION_X, priv->x_res);
729 input_abs_set_res(dev, ABS_MT_POSITION_Y, priv->y_res);
730 }
731
732 if (SYN_CAP_PALMDETECT(priv->capabilities))
733 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
734
735 __set_bit(EV_KEY, dev->evbit);
736 __set_bit(BTN_TOUCH, dev->keybit);
737 __set_bit(BTN_TOOL_FINGER, dev->keybit);
738 __set_bit(BTN_LEFT, dev->keybit);
739 __set_bit(BTN_RIGHT, dev->keybit);
740
741 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
742 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
743 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
744 }
745
746 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
747 __set_bit(BTN_MIDDLE, dev->keybit);
748
749 if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
750 SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
751 __set_bit(BTN_FORWARD, dev->keybit);
752 __set_bit(BTN_BACK, dev->keybit);
753 }
754
755 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
756 __set_bit(BTN_0 + i, dev->keybit);
757
758 __clear_bit(EV_REL, dev->evbit);
759 __clear_bit(REL_X, dev->relbit);
760 __clear_bit(REL_Y, dev->relbit);
761
762 input_abs_set_res(dev, ABS_X, priv->x_res);
763 input_abs_set_res(dev, ABS_Y, priv->y_res);
764
765 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
766 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
767 /* Clickpads report only left button */
768 __clear_bit(BTN_RIGHT, dev->keybit);
769 __clear_bit(BTN_MIDDLE, dev->keybit);
770 }
771}
772
773static void synaptics_disconnect(struct psmouse *psmouse)
774{
775 synaptics_reset(psmouse);
776 kfree(psmouse->private);
777 psmouse->private = NULL;
778}
779
780static int synaptics_reconnect(struct psmouse *psmouse)
781{
782 struct synaptics_data *priv = psmouse->private;
783 struct synaptics_data old_priv = *priv;
784 int retry = 0;
785 int error;
786
787 do {
788 psmouse_reset(psmouse);
789 error = synaptics_detect(psmouse, 0);
790 } while (error && ++retry < 3);
791
792 if (error)
793 return -1;
794
795 if (retry > 1)
796 printk(KERN_DEBUG "Synaptics reconnected after %d tries\n",
797 retry);
798
799 if (synaptics_query_hardware(psmouse)) {
800 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
801 return -1;
802 }
803
804 if (synaptics_set_absolute_mode(psmouse)) {
805 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
806 return -1;
807 }
808
809 if (synaptics_set_advanced_gesture_mode(psmouse)) {
810 printk(KERN_ERR "Advanced gesture mode reconnect failed.\n");
811 return -1;
812 }
813
814 if (old_priv.identity != priv->identity ||
815 old_priv.model_id != priv->model_id ||
816 old_priv.capabilities != priv->capabilities ||
817 old_priv.ext_cap != priv->ext_cap) {
818 printk(KERN_ERR "Synaptics hardware appears to be different: "
819 "id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
820 old_priv.identity, priv->identity,
821 old_priv.model_id, priv->model_id,
822 old_priv.capabilities, priv->capabilities,
823 old_priv.ext_cap, priv->ext_cap);
824 return -1;
825 }
826
827 return 0;
828}
829
830static bool impaired_toshiba_kbc;
831
832static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
833#if defined(CONFIG_DMI) && defined(CONFIG_X86)
834 {
835 /* Toshiba Satellite */
836 .matches = {
837 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
838 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
839 },
840 },
841 {
842 /* Toshiba Dynabook */
843 .matches = {
844 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
845 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
846 },
847 },
848 {
849 /* Toshiba Portege M300 */
850 .matches = {
851 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
852 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
853 },
854
855 },
856 {
857 /* Toshiba Portege M300 */
858 .matches = {
859 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
860 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
861 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
862 },
863
864 },
865#endif
866 { }
867};
868
869static bool broken_olpc_ec;
870
871static const struct dmi_system_id __initconst olpc_dmi_table[] = {
872#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
873 {
874 /* OLPC XO-1 or XO-1.5 */
875 .matches = {
876 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
877 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
878 },
879 },
880#endif
881 { }
882};
883
884void __init synaptics_module_init(void)
885{
886 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
887 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
888}
889
890int synaptics_init(struct psmouse *psmouse)
891{
892 struct synaptics_data *priv;
893
894 /*
895 * The OLPC XO has issues with Synaptics' absolute mode; similarly to
896 * the HGPK, it quickly degrades and the hardware becomes jumpy and
897 * overly sensitive. Not only that, but the constant packet spew
898 * (even at a lowered 40pps rate) overloads the EC such that key
899 * presses on the keyboard are missed. Given all of that, don't
900 * even attempt to use Synaptics mode. Relative mode seems to work
901 * just fine.
902 */
903 if (broken_olpc_ec) {
904 printk(KERN_INFO "synaptics: OLPC XO detected, not enabling Synaptics protocol.\n");
905 return -ENODEV;
906 }
907
908 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
909 if (!priv)
910 return -ENOMEM;
911
912 psmouse_reset(psmouse);
913
914 if (synaptics_query_hardware(psmouse)) {
915 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
916 goto init_fail;
917 }
918
919 if (synaptics_set_absolute_mode(psmouse)) {
920 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
921 goto init_fail;
922 }
923
924 if (synaptics_set_advanced_gesture_mode(psmouse)) {
925 printk(KERN_ERR "Advanced gesture mode init failed.\n");
926 goto init_fail;
927 }
928
929 priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
930
931 printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
932 SYN_ID_MODEL(priv->identity),
933 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
934 priv->model_id, priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
935
936 set_input_params(psmouse->dev, priv);
937
938 /*
939 * Encode touchpad model so that it can be used to set
940 * input device->id.version and be visible to userspace.
941 * Because version is __u16 we have to drop something.
942 * Hardware info bits seem to be good candidates as they
943 * are documented to be for Synaptics corp. internal use.
944 */
945 psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
946 (priv->model_id & 0x000000ff);
947
948 psmouse->protocol_handler = synaptics_process_byte;
949 psmouse->set_rate = synaptics_set_rate;
950 psmouse->disconnect = synaptics_disconnect;
951 psmouse->reconnect = synaptics_reconnect;
952 psmouse->cleanup = synaptics_reset;
953 psmouse->pktsize = 6;
954 /* Synaptics can usually stay in sync without extra help */
955 psmouse->resync_time = 0;
956
957 if (SYN_CAP_PASS_THROUGH(priv->capabilities))
958 synaptics_pt_create(psmouse);
959
960 /*
961 * Toshiba's KBC seems to have trouble handling data from
962 * Synaptics at full rate. Switch to a lower rate (roughly
963 * the same rate as a standard PS/2 mouse).
964 */
965 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
966 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
967 dmi_get_system_info(DMI_PRODUCT_NAME));
968 psmouse->rate = 40;
969 }
970
971 return 0;
972
973 init_fail:
974 kfree(priv);
975 return -1;
976}
977
978bool synaptics_supported(void)
979{
980 return true;
981}
982
983#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
984
985void __init synaptics_module_init(void)
986{
987}
988
989int synaptics_init(struct psmouse *psmouse)
990{
991 return -ENOSYS;
992}
993
994bool synaptics_supported(void)
995{
996 return false;
997}
998
999#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */