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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// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Synaptics TouchPad PS/2 mouse driver
4 *
5 * 2003 Dmitry Torokhov <dtor@mail.ru>
6 * Added support for pass-through port. Special thanks to Peter Berg Larsen
7 * for explaining various Synaptics quirks.
8 *
9 * 2003 Peter Osterlund <petero2@telia.com>
10 * Ported to 2.5 input device infrastructure.
11 *
12 * Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
13 * start merging tpconfig and gpm code to a xfree-input module
14 * adding some changes and extensions (ex. 3rd and 4th button)
15 *
16 * Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
17 * Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
18 * code for the special synaptics commands (from the tpconfig-source)
19 *
20 * Trademarks are the property of their respective owners.
21 */
22
23#include <linux/module.h>
24#include <linux/delay.h>
25#include <linux/dmi.h>
26#include <linux/input/mt.h>
27#include <linux/serio.h>
28#include <linux/libps2.h>
29#include <linux/rmi.h>
30#include <linux/i2c.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 0
43#define XMAX 6143
44#define YMIN 0
45#define YMAX 6143
46#define XMIN_NOMINAL 1472
47#define XMAX_NOMINAL 5472
48#define YMIN_NOMINAL 1408
49#define YMAX_NOMINAL 4448
50
51/* Size in bits of absolute position values reported by the hardware */
52#define ABS_POS_BITS 13
53
54/*
55 * These values should represent the absolute maximum value that will
56 * be reported for a positive position value. Some Synaptics firmware
57 * uses this value to indicate a finger near the edge of the touchpad
58 * whose precise position cannot be determined.
59 *
60 * At least one touchpad is known to report positions in excess of this
61 * value which are actually negative values truncated to the 13-bit
62 * reporting range. These values have never been observed to be lower
63 * than 8184 (i.e. -8), so we treat all values greater than 8176 as
64 * negative and any other value as positive.
65 */
66#define X_MAX_POSITIVE 8176
67#define Y_MAX_POSITIVE 8176
68
69/* maximum ABS_MT_POSITION displacement (in mm) */
70#define DMAX 10
71
72/*****************************************************************************
73 * Stuff we need even when we do not want native Synaptics support
74 ****************************************************************************/
75
76/*
77 * Set the synaptics touchpad mode byte by special commands
78 */
79static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
80{
81 u8 param[1];
82 int error;
83
84 error = ps2_sliced_command(&psmouse->ps2dev, mode);
85 if (error)
86 return error;
87
88 param[0] = SYN_PS_SET_MODE2;
89 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
90 if (error)
91 return error;
92
93 return 0;
94}
95
96int synaptics_detect(struct psmouse *psmouse, bool set_properties)
97{
98 struct ps2dev *ps2dev = &psmouse->ps2dev;
99 u8 param[4] = { 0 };
100
101 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
102 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
103 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
104 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
105 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
106
107 if (param[1] != 0x47)
108 return -ENODEV;
109
110 if (set_properties) {
111 psmouse->vendor = "Synaptics";
112 psmouse->name = "TouchPad";
113 }
114
115 return 0;
116}
117
118void synaptics_reset(struct psmouse *psmouse)
119{
120 /* reset touchpad back to relative mode, gestures enabled */
121 synaptics_mode_cmd(psmouse, 0);
122}
123
124#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
125 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
126
127/* This list has been kindly provided by Synaptics. */
128static const char * const topbuttonpad_pnp_ids[] = {
129 "LEN0017",
130 "LEN0018",
131 "LEN0019",
132 "LEN0023",
133 "LEN002A",
134 "LEN002B",
135 "LEN002C",
136 "LEN002D",
137 "LEN002E",
138 "LEN0033", /* Helix */
139 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
140 "LEN0035", /* X240 */
141 "LEN0036", /* T440 */
142 "LEN0037", /* X1 Carbon 2nd */
143 "LEN0038",
144 "LEN0039", /* T440s */
145 "LEN0041",
146 "LEN0042", /* Yoga */
147 "LEN0045",
148 "LEN0047",
149 "LEN0049",
150 "LEN2000", /* S540 */
151 "LEN2001", /* Edge E431 */
152 "LEN2002", /* Edge E531 */
153 "LEN2003",
154 "LEN2004", /* L440 */
155 "LEN2005",
156 "LEN2006", /* Edge E440/E540 */
157 "LEN2007",
158 "LEN2008",
159 "LEN2009",
160 "LEN200A",
161 "LEN200B",
162 NULL
163};
164
165static const char * const smbus_pnp_ids[] = {
166 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
167 "LEN0048", /* X1 Carbon 3 */
168 "LEN0046", /* X250 */
169 "LEN004a", /* W541 */
170 "LEN005b", /* P50 */
171 "LEN005e", /* T560 */
172 "LEN0071", /* T480 */
173 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
174 "LEN0073", /* X1 Carbon G5 (Elantech) */
175 "LEN0092", /* X1 Carbon 6 */
176 "LEN0093", /* T480 */
177 "LEN0096", /* X280 */
178 "LEN0097", /* X280 -> ALPS trackpoint */
179 "LEN009b", /* T580 */
180 "LEN200f", /* T450s */
181 "LEN2054", /* E480 */
182 "LEN2055", /* E580 */
183 "SYN3052", /* HP EliteBook 840 G4 */
184 "SYN3221", /* HP 15-ay000 */
185 "SYN323d", /* HP Spectre X360 13-w013dx */
186 NULL
187};
188
189static const char * const forcepad_pnp_ids[] = {
190 "SYN300D",
191 "SYN3014",
192 NULL
193};
194
195/*
196 * Send a command to the synaptics touchpad by special commands
197 */
198static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
199{
200 int error;
201
202 error = ps2_sliced_command(&psmouse->ps2dev, cmd);
203 if (error)
204 return error;
205
206 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
207 if (error)
208 return error;
209
210 return 0;
211}
212
213static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
214{
215 int error;
216 union {
217 __be32 be_val;
218 char buf[4];
219 } resp = { 0 };
220
221 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
222 if (error)
223 return error;
224
225 *val = be32_to_cpu(resp.be_val);
226 return 0;
227}
228
229/*
230 * Identify Touchpad
231 * See also the SYN_ID_* macros
232 */
233static int synaptics_identify(struct psmouse *psmouse,
234 struct synaptics_device_info *info)
235{
236 int error;
237
238 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
239 if (error)
240 return error;
241
242 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
243}
244
245/*
246 * Read the model-id bytes from the touchpad
247 * see also SYN_MODEL_* macros
248 */
249static int synaptics_model_id(struct psmouse *psmouse,
250 struct synaptics_device_info *info)
251{
252 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
253}
254
255/*
256 * Read the firmware id from the touchpad
257 */
258static int synaptics_firmware_id(struct psmouse *psmouse,
259 struct synaptics_device_info *info)
260{
261 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
262 &info->firmware_id);
263}
264
265/*
266 * Read the board id and the "More Extended Queries" from the touchpad
267 * The board id is encoded in the "QUERY MODES" response
268 */
269static int synaptics_query_modes(struct psmouse *psmouse,
270 struct synaptics_device_info *info)
271{
272 u8 bid[3];
273 int error;
274
275 /* firmwares prior 7.5 have no board_id encoded */
276 if (SYN_ID_FULL(info->identity) < 0x705)
277 return 0;
278
279 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
280 if (error)
281 return error;
282
283 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
284
285 if (SYN_MEXT_CAP_BIT(bid[0]))
286 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
287 &info->ext_cap_10);
288
289 return 0;
290}
291
292/*
293 * Read the capability-bits from the touchpad
294 * see also the SYN_CAP_* macros
295 */
296static int synaptics_capability(struct psmouse *psmouse,
297 struct synaptics_device_info *info)
298{
299 int error;
300
301 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
302 &info->capabilities);
303 if (error)
304 return error;
305
306 info->ext_cap = info->ext_cap_0c = 0;
307
308 /*
309 * Older firmwares had submodel ID fixed to 0x47
310 */
311 if (SYN_ID_FULL(info->identity) < 0x705 &&
312 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
313 return -ENXIO;
314 }
315
316 /*
317 * Unless capExtended is set the rest of the flags should be ignored
318 */
319 if (!SYN_CAP_EXTENDED(info->capabilities))
320 info->capabilities = 0;
321
322 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
323 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
324 &info->ext_cap);
325 if (error) {
326 psmouse_warn(psmouse,
327 "device claims to have extended capabilities, but I'm not able to read them.\n");
328 } else {
329 /*
330 * if nExtBtn is greater than 8 it should be considered
331 * invalid and treated as 0
332 */
333 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
334 info->ext_cap &= ~SYN_CAP_MB_MASK;
335 }
336 }
337
338 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
339 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
340 &info->ext_cap_0c);
341 if (error)
342 psmouse_warn(psmouse,
343 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
344 }
345
346 return 0;
347}
348
349/*
350 * Read touchpad resolution and maximum reported coordinates
351 * Resolution is left zero if touchpad does not support the query
352 */
353static int synaptics_resolution(struct psmouse *psmouse,
354 struct synaptics_device_info *info)
355{
356 u8 resp[3];
357 int error;
358
359 if (SYN_ID_MAJOR(info->identity) < 4)
360 return 0;
361
362 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
363 if (!error) {
364 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
365 info->x_res = resp[0]; /* x resolution in units/mm */
366 info->y_res = resp[2]; /* y resolution in units/mm */
367 }
368 }
369
370 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
371 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
372 error = synaptics_send_cmd(psmouse,
373 SYN_QUE_EXT_MAX_COORDS, resp);
374 if (error) {
375 psmouse_warn(psmouse,
376 "device claims to have max coordinates query, but I'm not able to read it.\n");
377 } else {
378 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
379 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
380 psmouse_info(psmouse,
381 "queried max coordinates: x [..%d], y [..%d]\n",
382 info->x_max, info->y_max);
383 }
384 }
385
386 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
387 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
388 /*
389 * Firmware v8.1 does not report proper number of extended
390 * capabilities, but has been proven to report correct min
391 * coordinates.
392 */
393 SYN_ID_FULL(info->identity) == 0x801)) {
394 error = synaptics_send_cmd(psmouse,
395 SYN_QUE_EXT_MIN_COORDS, resp);
396 if (error) {
397 psmouse_warn(psmouse,
398 "device claims to have min coordinates query, but I'm not able to read it.\n");
399 } else {
400 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
401 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
402 psmouse_info(psmouse,
403 "queried min coordinates: x [%d..], y [%d..]\n",
404 info->x_min, info->y_min);
405 }
406 }
407
408 return 0;
409}
410
411static int synaptics_query_hardware(struct psmouse *psmouse,
412 struct synaptics_device_info *info)
413{
414 int error;
415
416 memset(info, 0, sizeof(*info));
417
418 error = synaptics_identify(psmouse, info);
419 if (error)
420 return error;
421
422 error = synaptics_model_id(psmouse, info);
423 if (error)
424 return error;
425
426 error = synaptics_firmware_id(psmouse, info);
427 if (error)
428 return error;
429
430 error = synaptics_query_modes(psmouse, info);
431 if (error)
432 return error;
433
434 error = synaptics_capability(psmouse, info);
435 if (error)
436 return error;
437
438 error = synaptics_resolution(psmouse, info);
439 if (error)
440 return error;
441
442 return 0;
443}
444
445#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
446
447#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
448
449static bool cr48_profile_sensor;
450
451#define ANY_BOARD_ID 0
452struct min_max_quirk {
453 const char * const *pnp_ids;
454 struct {
455 u32 min, max;
456 } board_id;
457 u32 x_min, x_max, y_min, y_max;
458};
459
460static const struct min_max_quirk min_max_pnpid_table[] = {
461 {
462 (const char * const []){"LEN0033", NULL},
463 {ANY_BOARD_ID, ANY_BOARD_ID},
464 1024, 5052, 2258, 4832
465 },
466 {
467 (const char * const []){"LEN0042", NULL},
468 {ANY_BOARD_ID, ANY_BOARD_ID},
469 1232, 5710, 1156, 4696
470 },
471 {
472 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
473 "LEN0039", "LEN2002", "LEN2004",
474 NULL},
475 {ANY_BOARD_ID, 2961},
476 1024, 5112, 2024, 4832
477 },
478 {
479 (const char * const []){"LEN2000", NULL},
480 {ANY_BOARD_ID, ANY_BOARD_ID},
481 1024, 5113, 2021, 4832
482 },
483 {
484 (const char * const []){"LEN2001", NULL},
485 {ANY_BOARD_ID, ANY_BOARD_ID},
486 1024, 5022, 2508, 4832
487 },
488 {
489 (const char * const []){"LEN2006", NULL},
490 {2691, 2691},
491 1024, 5045, 2457, 4832
492 },
493 {
494 (const char * const []){"LEN2006", NULL},
495 {ANY_BOARD_ID, ANY_BOARD_ID},
496 1264, 5675, 1171, 4688
497 },
498 { }
499};
500
501/*****************************************************************************
502 * Synaptics communications functions
503 ****************************************************************************/
504
505/*
506 * Synaptics touchpads report the y coordinate from bottom to top, which is
507 * opposite from what userspace expects.
508 * This function is used to invert y before reporting.
509 */
510static int synaptics_invert_y(int y)
511{
512 return YMAX_NOMINAL + YMIN_NOMINAL - y;
513}
514
515/*
516 * Apply quirk(s) if the hardware matches
517 */
518static void synaptics_apply_quirks(struct psmouse *psmouse,
519 struct synaptics_device_info *info)
520{
521 int i;
522
523 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
524 if (!psmouse_matches_pnp_id(psmouse,
525 min_max_pnpid_table[i].pnp_ids))
526 continue;
527
528 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
529 info->board_id < min_max_pnpid_table[i].board_id.min)
530 continue;
531
532 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
533 info->board_id > min_max_pnpid_table[i].board_id.max)
534 continue;
535
536 info->x_min = min_max_pnpid_table[i].x_min;
537 info->x_max = min_max_pnpid_table[i].x_max;
538 info->y_min = min_max_pnpid_table[i].y_min;
539 info->y_max = min_max_pnpid_table[i].y_max;
540 psmouse_info(psmouse,
541 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
542 info->x_min, info->x_max,
543 info->y_min, info->y_max);
544 break;
545 }
546}
547
548static bool synaptics_has_agm(struct synaptics_data *priv)
549{
550 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
551 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
552}
553
554static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
555{
556 static u8 param = 0xc8;
557 int error;
558
559 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
560 if (error)
561 return error;
562
563 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE);
564 if (error)
565 return error;
566
567 return 0;
568}
569
570static int synaptics_set_mode(struct psmouse *psmouse)
571{
572 struct synaptics_data *priv = psmouse->private;
573 int error;
574
575 priv->mode = 0;
576 if (priv->absolute_mode)
577 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
578 if (priv->disable_gesture)
579 priv->mode |= SYN_BIT_DISABLE_GESTURE;
580 if (psmouse->rate >= 80)
581 priv->mode |= SYN_BIT_HIGH_RATE;
582 if (SYN_CAP_EXTENDED(priv->info.capabilities))
583 priv->mode |= SYN_BIT_W_MODE;
584
585 error = synaptics_mode_cmd(psmouse, priv->mode);
586 if (error)
587 return error;
588
589 if (priv->absolute_mode && synaptics_has_agm(priv)) {
590 error = synaptics_set_advanced_gesture_mode(psmouse);
591 if (error) {
592 psmouse_err(psmouse,
593 "Advanced gesture mode init failed: %d\n",
594 error);
595 return error;
596 }
597 }
598
599 return 0;
600}
601
602static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
603{
604 struct synaptics_data *priv = psmouse->private;
605
606 if (rate >= 80) {
607 priv->mode |= SYN_BIT_HIGH_RATE;
608 psmouse->rate = 80;
609 } else {
610 priv->mode &= ~SYN_BIT_HIGH_RATE;
611 psmouse->rate = 40;
612 }
613
614 synaptics_mode_cmd(psmouse, priv->mode);
615}
616
617/*****************************************************************************
618 * Synaptics pass-through PS/2 port support
619 ****************************************************************************/
620static int synaptics_pt_write(struct serio *serio, u8 c)
621{
622 struct psmouse *parent = serio_get_drvdata(serio->parent);
623 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
624 int error;
625
626 error = ps2_sliced_command(&parent->ps2dev, c);
627 if (error)
628 return error;
629
630 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
631 if (error)
632 return error;
633
634 return 0;
635}
636
637static int synaptics_pt_start(struct serio *serio)
638{
639 struct psmouse *parent = serio_get_drvdata(serio->parent);
640 struct synaptics_data *priv = parent->private;
641
642 serio_pause_rx(parent->ps2dev.serio);
643 priv->pt_port = serio;
644 serio_continue_rx(parent->ps2dev.serio);
645
646 return 0;
647}
648
649static void synaptics_pt_stop(struct serio *serio)
650{
651 struct psmouse *parent = serio_get_drvdata(serio->parent);
652 struct synaptics_data *priv = parent->private;
653
654 serio_pause_rx(parent->ps2dev.serio);
655 priv->pt_port = NULL;
656 serio_continue_rx(parent->ps2dev.serio);
657}
658
659static int synaptics_is_pt_packet(u8 *buf)
660{
661 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
662}
663
664static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
665{
666 struct psmouse *child = serio_get_drvdata(ptport);
667
668 if (child && child->state == PSMOUSE_ACTIVATED) {
669 serio_interrupt(ptport, packet[1], 0);
670 serio_interrupt(ptport, packet[4], 0);
671 serio_interrupt(ptport, packet[5], 0);
672 if (child->pktsize == 4)
673 serio_interrupt(ptport, packet[2], 0);
674 } else {
675 serio_interrupt(ptport, packet[1], 0);
676 }
677}
678
679static void synaptics_pt_activate(struct psmouse *psmouse)
680{
681 struct synaptics_data *priv = psmouse->private;
682 struct psmouse *child = serio_get_drvdata(priv->pt_port);
683
684 /* adjust the touchpad to child's choice of protocol */
685 if (child) {
686 if (child->pktsize == 4)
687 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
688 else
689 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
690
691 if (synaptics_mode_cmd(psmouse, priv->mode))
692 psmouse_warn(psmouse,
693 "failed to switch guest protocol\n");
694 }
695}
696
697static void synaptics_pt_create(struct psmouse *psmouse)
698{
699 struct serio *serio;
700
701 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
702 if (!serio) {
703 psmouse_err(psmouse,
704 "not enough memory for pass-through port\n");
705 return;
706 }
707
708 serio->id.type = SERIO_PS_PSTHRU;
709 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
710 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
711 serio->write = synaptics_pt_write;
712 serio->start = synaptics_pt_start;
713 serio->stop = synaptics_pt_stop;
714 serio->parent = psmouse->ps2dev.serio;
715
716 psmouse->pt_activate = synaptics_pt_activate;
717
718 psmouse_info(psmouse, "serio: %s port at %s\n",
719 serio->name, psmouse->phys);
720 serio_register_port(serio);
721}
722
723/*****************************************************************************
724 * Functions to interpret the absolute mode packets
725 ****************************************************************************/
726
727static void synaptics_parse_agm(const u8 buf[],
728 struct synaptics_data *priv,
729 struct synaptics_hw_state *hw)
730{
731 struct synaptics_hw_state *agm = &priv->agm;
732 int agm_packet_type;
733
734 agm_packet_type = (buf[5] & 0x30) >> 4;
735 switch (agm_packet_type) {
736 case 1:
737 /* Gesture packet: (x, y, z) half resolution */
738 agm->w = hw->w;
739 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
740 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
741 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
742 break;
743
744 case 2:
745 /* AGM-CONTACT packet: we are only interested in the count */
746 priv->agm_count = buf[1];
747 break;
748
749 default:
750 break;
751 }
752}
753
754static void synaptics_parse_ext_buttons(const u8 buf[],
755 struct synaptics_data *priv,
756 struct synaptics_hw_state *hw)
757{
758 unsigned int ext_bits =
759 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
760 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
761
762 hw->ext_buttons = buf[4] & ext_mask;
763 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
764}
765
766static int synaptics_parse_hw_state(const u8 buf[],
767 struct synaptics_data *priv,
768 struct synaptics_hw_state *hw)
769{
770 memset(hw, 0, sizeof(struct synaptics_hw_state));
771
772 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
773 hw->w = (((buf[0] & 0x30) >> 2) |
774 ((buf[0] & 0x04) >> 1) |
775 ((buf[3] & 0x04) >> 2));
776
777 if (synaptics_has_agm(priv) && hw->w == 2) {
778 synaptics_parse_agm(buf, priv, hw);
779 return 1;
780 }
781
782 hw->x = (((buf[3] & 0x10) << 8) |
783 ((buf[1] & 0x0f) << 8) |
784 buf[4]);
785 hw->y = (((buf[3] & 0x20) << 7) |
786 ((buf[1] & 0xf0) << 4) |
787 buf[5]);
788 hw->z = buf[2];
789
790 hw->left = (buf[0] & 0x01) ? 1 : 0;
791 hw->right = (buf[0] & 0x02) ? 1 : 0;
792
793 if (priv->is_forcepad) {
794 /*
795 * ForcePads, like Clickpads, use middle button
796 * bits to report primary button clicks.
797 * Unfortunately they report primary button not
798 * only when user presses on the pad above certain
799 * threshold, but also when there are more than one
800 * finger on the touchpad, which interferes with
801 * out multi-finger gestures.
802 */
803 if (hw->z == 0) {
804 /* No contacts */
805 priv->press = priv->report_press = false;
806 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
807 /*
808 * Single-finger touch with pressure above
809 * the threshold. If pressure stays long
810 * enough, we'll start reporting primary
811 * button. We rely on the device continuing
812 * sending data even if finger does not
813 * move.
814 */
815 if (!priv->press) {
816 priv->press_start = jiffies;
817 priv->press = true;
818 } else if (time_after(jiffies,
819 priv->press_start +
820 msecs_to_jiffies(50))) {
821 priv->report_press = true;
822 }
823 } else {
824 priv->press = false;
825 }
826
827 hw->left = priv->report_press;
828
829 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
830 /*
831 * Clickpad's button is transmitted as middle button,
832 * however, since it is primary button, we will report
833 * it as BTN_LEFT.
834 */
835 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
836
837 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
838 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
839 if (hw->w == 2)
840 hw->scroll = (s8)buf[1];
841 }
842
843 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
844 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
845 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
846 }
847
848 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
849 ((buf[0] ^ buf[3]) & 0x02)) {
850 synaptics_parse_ext_buttons(buf, priv, hw);
851 }
852 } else {
853 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
854 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
855
856 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
857 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
858
859 hw->left = (buf[0] & 0x01) ? 1 : 0;
860 hw->right = (buf[0] & 0x02) ? 1 : 0;
861 }
862
863 /*
864 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
865 * is used by some firmware to indicate a finger at the edge of
866 * the touchpad whose precise position cannot be determined, so
867 * convert these values to the maximum axis value.
868 */
869 if (hw->x > X_MAX_POSITIVE)
870 hw->x -= 1 << ABS_POS_BITS;
871 else if (hw->x == X_MAX_POSITIVE)
872 hw->x = XMAX;
873
874 if (hw->y > Y_MAX_POSITIVE)
875 hw->y -= 1 << ABS_POS_BITS;
876 else if (hw->y == Y_MAX_POSITIVE)
877 hw->y = YMAX;
878
879 return 0;
880}
881
882static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
883 bool active, int x, int y)
884{
885 input_mt_slot(dev, slot);
886 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
887 if (active) {
888 input_report_abs(dev, ABS_MT_POSITION_X, x);
889 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
890 }
891}
892
893static void synaptics_report_semi_mt_data(struct input_dev *dev,
894 const struct synaptics_hw_state *a,
895 const struct synaptics_hw_state *b,
896 int num_fingers)
897{
898 if (num_fingers >= 2) {
899 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
900 min(a->y, b->y));
901 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
902 max(a->y, b->y));
903 } else if (num_fingers == 1) {
904 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
905 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
906 } else {
907 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
908 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
909 }
910}
911
912static void synaptics_report_ext_buttons(struct psmouse *psmouse,
913 const struct synaptics_hw_state *hw)
914{
915 struct input_dev *dev = psmouse->dev;
916 struct synaptics_data *priv = psmouse->private;
917 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
918 int i;
919
920 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
921 return;
922
923 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
924 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
925 SYN_ID_FULL(priv->info.identity) == 0x802) &&
926 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
927 return;
928
929 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
930 for (i = 0; i < ext_bits; i++) {
931 input_report_key(dev, BTN_0 + 2 * i,
932 hw->ext_buttons & BIT(i));
933 input_report_key(dev, BTN_1 + 2 * i,
934 hw->ext_buttons & BIT(i + ext_bits));
935 }
936 return;
937 }
938
939 /*
940 * This generation of touchpads has the trackstick buttons
941 * physically wired to the touchpad. Re-route them through
942 * the pass-through interface.
943 */
944 if (priv->pt_port) {
945 u8 pt_buttons;
946
947 /* The trackstick expects at most 3 buttons */
948 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
949 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
950 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
951
952 serio_interrupt(priv->pt_port,
953 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
954 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
955 }
956}
957
958static void synaptics_report_buttons(struct psmouse *psmouse,
959 const struct synaptics_hw_state *hw)
960{
961 struct input_dev *dev = psmouse->dev;
962 struct synaptics_data *priv = psmouse->private;
963
964 input_report_key(dev, BTN_LEFT, hw->left);
965 input_report_key(dev, BTN_RIGHT, hw->right);
966
967 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
968 input_report_key(dev, BTN_MIDDLE, hw->middle);
969
970 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
971 input_report_key(dev, BTN_FORWARD, hw->up);
972 input_report_key(dev, BTN_BACK, hw->down);
973 }
974
975 synaptics_report_ext_buttons(psmouse, hw);
976}
977
978static void synaptics_report_mt_data(struct psmouse *psmouse,
979 const struct synaptics_hw_state *sgm,
980 int num_fingers)
981{
982 struct input_dev *dev = psmouse->dev;
983 struct synaptics_data *priv = psmouse->private;
984 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
985 struct input_mt_pos pos[2];
986 int slot[2], nsemi, i;
987
988 nsemi = clamp_val(num_fingers, 0, 2);
989
990 for (i = 0; i < nsemi; i++) {
991 pos[i].x = hw[i]->x;
992 pos[i].y = synaptics_invert_y(hw[i]->y);
993 }
994
995 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
996
997 for (i = 0; i < nsemi; i++) {
998 input_mt_slot(dev, slot[i]);
999 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1000 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1001 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1002 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1003 }
1004
1005 input_mt_drop_unused(dev);
1006
1007 /* Don't use active slot count to generate BTN_TOOL events. */
1008 input_mt_report_pointer_emulation(dev, false);
1009
1010 /* Send the number of fingers reported by touchpad itself. */
1011 input_mt_report_finger_count(dev, num_fingers);
1012
1013 synaptics_report_buttons(psmouse, sgm);
1014
1015 input_sync(dev);
1016}
1017
1018static void synaptics_image_sensor_process(struct psmouse *psmouse,
1019 struct synaptics_hw_state *sgm)
1020{
1021 struct synaptics_data *priv = psmouse->private;
1022 int num_fingers;
1023
1024 /*
1025 * Update mt_state using the new finger count and current mt_state.
1026 */
1027 if (sgm->z == 0)
1028 num_fingers = 0;
1029 else if (sgm->w >= 4)
1030 num_fingers = 1;
1031 else if (sgm->w == 0)
1032 num_fingers = 2;
1033 else if (sgm->w == 1)
1034 num_fingers = priv->agm_count ? priv->agm_count : 3;
1035 else
1036 num_fingers = 4;
1037
1038 /* Send resulting input events to user space */
1039 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1040}
1041
1042static bool synaptics_has_multifinger(struct synaptics_data *priv)
1043{
1044 if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1045 return true;
1046
1047 /* Advanced gesture mode also sends multi finger data */
1048 return synaptics_has_agm(priv);
1049}
1050
1051/*
1052 * called for each full received packet from the touchpad
1053 */
1054static void synaptics_process_packet(struct psmouse *psmouse)
1055{
1056 struct input_dev *dev = psmouse->dev;
1057 struct synaptics_data *priv = psmouse->private;
1058 struct synaptics_device_info *info = &priv->info;
1059 struct synaptics_hw_state hw;
1060 int num_fingers;
1061 int finger_width;
1062
1063 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1064 return;
1065
1066 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1067 synaptics_image_sensor_process(psmouse, &hw);
1068 return;
1069 }
1070
1071 if (hw.scroll) {
1072 priv->scroll += hw.scroll;
1073
1074 while (priv->scroll >= 4) {
1075 input_report_key(dev, BTN_BACK, !hw.down);
1076 input_sync(dev);
1077 input_report_key(dev, BTN_BACK, hw.down);
1078 input_sync(dev);
1079 priv->scroll -= 4;
1080 }
1081 while (priv->scroll <= -4) {
1082 input_report_key(dev, BTN_FORWARD, !hw.up);
1083 input_sync(dev);
1084 input_report_key(dev, BTN_FORWARD, hw.up);
1085 input_sync(dev);
1086 priv->scroll += 4;
1087 }
1088 return;
1089 }
1090
1091 if (hw.z > 0 && hw.x > 1) {
1092 num_fingers = 1;
1093 finger_width = 5;
1094 if (SYN_CAP_EXTENDED(info->capabilities)) {
1095 switch (hw.w) {
1096 case 0 ... 1:
1097 if (synaptics_has_multifinger(priv))
1098 num_fingers = hw.w + 2;
1099 break;
1100 case 2:
1101 if (SYN_MODEL_PEN(info->model_id))
1102 ; /* Nothing, treat a pen as a single finger */
1103 break;
1104 case 4 ... 15:
1105 if (SYN_CAP_PALMDETECT(info->capabilities))
1106 finger_width = hw.w;
1107 break;
1108 }
1109 }
1110 } else {
1111 num_fingers = 0;
1112 finger_width = 0;
1113 }
1114
1115 if (cr48_profile_sensor) {
1116 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1117 return;
1118 }
1119
1120 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1121 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1122 num_fingers);
1123
1124 /* Post events
1125 * BTN_TOUCH has to be first as mousedev relies on it when doing
1126 * absolute -> relative conversion
1127 */
1128 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1129 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1130
1131 if (num_fingers > 0) {
1132 input_report_abs(dev, ABS_X, hw.x);
1133 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1134 }
1135 input_report_abs(dev, ABS_PRESSURE, hw.z);
1136
1137 if (SYN_CAP_PALMDETECT(info->capabilities))
1138 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1139
1140 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1141 if (synaptics_has_multifinger(priv)) {
1142 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1143 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1144 }
1145
1146 synaptics_report_buttons(psmouse, &hw);
1147
1148 input_sync(dev);
1149}
1150
1151static bool synaptics_validate_byte(struct psmouse *psmouse,
1152 int idx, enum synaptics_pkt_type pkt_type)
1153{
1154 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1155 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1156 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1157 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1158 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1159 const u8 *packet = psmouse->packet;
1160
1161 if (idx < 0 || idx > 4)
1162 return false;
1163
1164 switch (pkt_type) {
1165
1166 case SYN_NEWABS:
1167 case SYN_NEWABS_RELAXED:
1168 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1169
1170 case SYN_NEWABS_STRICT:
1171 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1172
1173 case SYN_OLDABS:
1174 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1175
1176 default:
1177 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1178 return false;
1179 }
1180}
1181
1182static enum synaptics_pkt_type
1183synaptics_detect_pkt_type(struct psmouse *psmouse)
1184{
1185 int i;
1186
1187 for (i = 0; i < 5; i++) {
1188 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1189 psmouse_info(psmouse, "using relaxed packet validation\n");
1190 return SYN_NEWABS_RELAXED;
1191 }
1192 }
1193
1194 return SYN_NEWABS_STRICT;
1195}
1196
1197static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1198{
1199 struct synaptics_data *priv = psmouse->private;
1200
1201 if (psmouse->pktcnt >= 6) { /* Full packet received */
1202 if (unlikely(priv->pkt_type == SYN_NEWABS))
1203 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1204
1205 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1206 synaptics_is_pt_packet(psmouse->packet)) {
1207 if (priv->pt_port)
1208 synaptics_pass_pt_packet(priv->pt_port,
1209 psmouse->packet);
1210 } else
1211 synaptics_process_packet(psmouse);
1212
1213 return PSMOUSE_FULL_PACKET;
1214 }
1215
1216 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1217 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1218}
1219
1220/*****************************************************************************
1221 * Driver initialization/cleanup functions
1222 ****************************************************************************/
1223static void set_abs_position_params(struct input_dev *dev,
1224 struct synaptics_device_info *info,
1225 int x_code, int y_code)
1226{
1227 int x_min = info->x_min ?: XMIN_NOMINAL;
1228 int x_max = info->x_max ?: XMAX_NOMINAL;
1229 int y_min = info->y_min ?: YMIN_NOMINAL;
1230 int y_max = info->y_max ?: YMAX_NOMINAL;
1231 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1232 SYN_REDUCED_FILTER_FUZZ : 0;
1233
1234 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1235 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1236 input_abs_set_res(dev, x_code, info->x_res);
1237 input_abs_set_res(dev, y_code, info->y_res);
1238}
1239
1240static int set_input_params(struct psmouse *psmouse,
1241 struct synaptics_data *priv)
1242{
1243 struct input_dev *dev = psmouse->dev;
1244 struct synaptics_device_info *info = &priv->info;
1245 int i;
1246 int error;
1247
1248 /* Reset default psmouse capabilities */
1249 __clear_bit(EV_REL, dev->evbit);
1250 bitmap_zero(dev->relbit, REL_CNT);
1251 bitmap_zero(dev->keybit, KEY_CNT);
1252
1253 /* Things that apply to both modes */
1254 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1255
1256 input_set_capability(dev, EV_KEY, BTN_LEFT);
1257
1258 /* Clickpads report only left button */
1259 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1260 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1261 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1262 input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1263 }
1264
1265 if (!priv->absolute_mode) {
1266 /* Relative mode */
1267 input_set_capability(dev, EV_REL, REL_X);
1268 input_set_capability(dev, EV_REL, REL_Y);
1269 return 0;
1270 }
1271
1272 /* Absolute mode */
1273 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1274 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1275
1276 if (cr48_profile_sensor)
1277 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1278
1279 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1280 set_abs_position_params(dev, info,
1281 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1282 /* Image sensors can report per-contact pressure */
1283 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1284
1285 error = input_mt_init_slots(dev, 2,
1286 INPUT_MT_POINTER | INPUT_MT_TRACK);
1287 if (error)
1288 return error;
1289
1290 /* Image sensors can signal 4 and 5 finger clicks */
1291 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1292 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1293 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1294 set_abs_position_params(dev, info,
1295 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1296 /*
1297 * Profile sensor in CR-48 tracks contacts reasonably well,
1298 * other non-image sensors with AGM use semi-mt.
1299 */
1300 error = input_mt_init_slots(dev, 2,
1301 INPUT_MT_POINTER |
1302 (cr48_profile_sensor ?
1303 INPUT_MT_TRACK :
1304 INPUT_MT_SEMI_MT));
1305 if (error)
1306 return error;
1307
1308 /*
1309 * For semi-mt devices we send ABS_X/Y ourselves instead of
1310 * input_mt_report_pointer_emulation. But
1311 * input_mt_init_slots() resets the fuzz to 0, leading to a
1312 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1313 * position. Let's re-initialize ABS_X/Y here.
1314 */
1315 if (!cr48_profile_sensor)
1316 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1317 }
1318
1319 if (SYN_CAP_PALMDETECT(info->capabilities))
1320 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1321
1322 input_set_capability(dev, EV_KEY, BTN_TOUCH);
1323 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1324
1325 if (synaptics_has_multifinger(priv)) {
1326 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1327 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1328 }
1329
1330 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1331 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1332 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1333 input_set_capability(dev, EV_KEY, BTN_BACK);
1334 }
1335
1336 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1337 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1338 input_set_capability(dev, EV_KEY, BTN_0 + i);
1339
1340 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1341 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1342 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1343 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1344 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1345 }
1346
1347 return 0;
1348}
1349
1350static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1351 void *data, char *buf)
1352{
1353 struct synaptics_data *priv = psmouse->private;
1354
1355 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1356}
1357
1358static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1359 void *data, const char *buf,
1360 size_t len)
1361{
1362 struct synaptics_data *priv = psmouse->private;
1363 unsigned int value;
1364 int err;
1365
1366 err = kstrtouint(buf, 10, &value);
1367 if (err)
1368 return err;
1369
1370 if (value > 1)
1371 return -EINVAL;
1372
1373 if (value == priv->disable_gesture)
1374 return len;
1375
1376 priv->disable_gesture = value;
1377 if (value)
1378 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1379 else
1380 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1381
1382 if (synaptics_mode_cmd(psmouse, priv->mode))
1383 return -EIO;
1384
1385 return len;
1386}
1387
1388PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1389 synaptics_show_disable_gesture,
1390 synaptics_set_disable_gesture);
1391
1392static void synaptics_disconnect(struct psmouse *psmouse)
1393{
1394 struct synaptics_data *priv = psmouse->private;
1395
1396 /*
1397 * We might have left a breadcrumb when trying to
1398 * set up SMbus companion.
1399 */
1400 psmouse_smbus_cleanup(psmouse);
1401
1402 if (!priv->absolute_mode &&
1403 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1404 device_remove_file(&psmouse->ps2dev.serio->dev,
1405 &psmouse_attr_disable_gesture.dattr);
1406
1407 synaptics_reset(psmouse);
1408 kfree(priv);
1409 psmouse->private = NULL;
1410}
1411
1412static int synaptics_reconnect(struct psmouse *psmouse)
1413{
1414 struct synaptics_data *priv = psmouse->private;
1415 struct synaptics_device_info info;
1416 u8 param[2];
1417 int retry = 0;
1418 int error;
1419
1420 do {
1421 psmouse_reset(psmouse);
1422 if (retry) {
1423 /*
1424 * On some boxes, right after resuming, the touchpad
1425 * needs some time to finish initializing (I assume
1426 * it needs time to calibrate) and start responding
1427 * to Synaptics-specific queries, so let's wait a
1428 * bit.
1429 */
1430 ssleep(1);
1431 }
1432 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1433 error = synaptics_detect(psmouse, 0);
1434 } while (error && ++retry < 3);
1435
1436 if (error)
1437 return error;
1438
1439 if (retry > 1)
1440 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1441
1442 error = synaptics_query_hardware(psmouse, &info);
1443 if (error) {
1444 psmouse_err(psmouse, "Unable to query device.\n");
1445 return error;
1446 }
1447
1448 error = synaptics_set_mode(psmouse);
1449 if (error) {
1450 psmouse_err(psmouse, "Unable to initialize device.\n");
1451 return error;
1452 }
1453
1454 if (info.identity != priv->info.identity ||
1455 info.model_id != priv->info.model_id ||
1456 info.capabilities != priv->info.capabilities ||
1457 info.ext_cap != priv->info.ext_cap) {
1458 psmouse_err(psmouse,
1459 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1460 priv->info.identity, info.identity,
1461 priv->info.model_id, info.model_id,
1462 priv->info.capabilities, info.capabilities,
1463 priv->info.ext_cap, info.ext_cap);
1464 return -ENXIO;
1465 }
1466
1467 return 0;
1468}
1469
1470static bool impaired_toshiba_kbc;
1471
1472static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1473#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1474 {
1475 /* Toshiba Satellite */
1476 .matches = {
1477 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1478 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1479 },
1480 },
1481 {
1482 /* Toshiba Dynabook */
1483 .matches = {
1484 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1485 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1486 },
1487 },
1488 {
1489 /* Toshiba Portege M300 */
1490 .matches = {
1491 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1492 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1493 },
1494
1495 },
1496 {
1497 /* Toshiba Portege M300 */
1498 .matches = {
1499 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1500 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1501 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1502 },
1503
1504 },
1505#endif
1506 { }
1507};
1508
1509static bool broken_olpc_ec;
1510
1511static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1512#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1513 {
1514 /* OLPC XO-1 or XO-1.5 */
1515 .matches = {
1516 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1517 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1518 },
1519 },
1520#endif
1521 { }
1522};
1523
1524static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1525#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1526 {
1527 /* Cr-48 Chromebook (Codename Mario) */
1528 .matches = {
1529 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1530 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1531 },
1532 },
1533#endif
1534 { }
1535};
1536
1537void __init synaptics_module_init(void)
1538{
1539 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1540 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1541 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1542}
1543
1544static int synaptics_init_ps2(struct psmouse *psmouse,
1545 struct synaptics_device_info *info,
1546 bool absolute_mode)
1547{
1548 struct synaptics_data *priv;
1549 int err;
1550
1551 synaptics_apply_quirks(psmouse, info);
1552
1553 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1554 if (!priv)
1555 return -ENOMEM;
1556
1557 priv->info = *info;
1558 priv->absolute_mode = absolute_mode;
1559 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1560 priv->disable_gesture = true;
1561
1562 /*
1563 * Unfortunately ForcePad capability is not exported over PS/2,
1564 * so we have to resort to checking PNP IDs.
1565 */
1566 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1567
1568 err = synaptics_set_mode(psmouse);
1569 if (err) {
1570 psmouse_err(psmouse, "Unable to initialize device.\n");
1571 goto init_fail;
1572 }
1573
1574 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1575 SYN_NEWABS : SYN_OLDABS;
1576
1577 psmouse_info(psmouse,
1578 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1579 SYN_ID_MODEL(info->identity),
1580 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1581 info->model_id,
1582 info->capabilities, info->ext_cap, info->ext_cap_0c,
1583 info->ext_cap_10, info->board_id, info->firmware_id);
1584
1585 err = set_input_params(psmouse, priv);
1586 if (err) {
1587 psmouse_err(psmouse,
1588 "failed to set up capabilities: %d\n", err);
1589 goto init_fail;
1590 }
1591
1592 /*
1593 * Encode touchpad model so that it can be used to set
1594 * input device->id.version and be visible to userspace.
1595 * Because version is __u16 we have to drop something.
1596 * Hardware info bits seem to be good candidates as they
1597 * are documented to be for Synaptics corp. internal use.
1598 */
1599 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1600 (info->model_id & 0x000000ff);
1601
1602 if (absolute_mode) {
1603 psmouse->protocol_handler = synaptics_process_byte;
1604 psmouse->pktsize = 6;
1605 } else {
1606 /* Relative mode follows standard PS/2 mouse protocol */
1607 psmouse->protocol_handler = psmouse_process_byte;
1608 psmouse->pktsize = 3;
1609 }
1610
1611 psmouse->set_rate = synaptics_set_rate;
1612 psmouse->disconnect = synaptics_disconnect;
1613 psmouse->reconnect = synaptics_reconnect;
1614 psmouse->cleanup = synaptics_reset;
1615 /* Synaptics can usually stay in sync without extra help */
1616 psmouse->resync_time = 0;
1617
1618 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1619 synaptics_pt_create(psmouse);
1620
1621 /*
1622 * Toshiba's KBC seems to have trouble handling data from
1623 * Synaptics at full rate. Switch to a lower rate (roughly
1624 * the same rate as a standard PS/2 mouse).
1625 */
1626 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1627 psmouse_info(psmouse,
1628 "Toshiba %s detected, limiting rate to 40pps.\n",
1629 dmi_get_system_info(DMI_PRODUCT_NAME));
1630 psmouse->rate = 40;
1631 }
1632
1633 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1634 err = device_create_file(&psmouse->ps2dev.serio->dev,
1635 &psmouse_attr_disable_gesture.dattr);
1636 if (err) {
1637 psmouse_err(psmouse,
1638 "Failed to create disable_gesture attribute (%d)",
1639 err);
1640 goto init_fail;
1641 }
1642 }
1643
1644 return 0;
1645
1646 init_fail:
1647 kfree(priv);
1648 return err;
1649}
1650
1651static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1652{
1653 struct synaptics_device_info info;
1654 int error;
1655
1656 psmouse_reset(psmouse);
1657
1658 error = synaptics_query_hardware(psmouse, &info);
1659 if (error) {
1660 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1661 return error;
1662 }
1663
1664 return synaptics_init_ps2(psmouse, &info, absolute_mode);
1665}
1666
1667int synaptics_init_absolute(struct psmouse *psmouse)
1668{
1669 return __synaptics_init(psmouse, true);
1670}
1671
1672int synaptics_init_relative(struct psmouse *psmouse)
1673{
1674 return __synaptics_init(psmouse, false);
1675}
1676
1677static int synaptics_setup_ps2(struct psmouse *psmouse,
1678 struct synaptics_device_info *info)
1679{
1680 bool absolute_mode = true;
1681 int error;
1682
1683 /*
1684 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1685 * packet spew overloads the EC such that key presses on the keyboard
1686 * are missed. Given that, don't even attempt to use Absolute mode.
1687 * Relative mode seems to work just fine.
1688 */
1689 if (broken_olpc_ec) {
1690 psmouse_info(psmouse,
1691 "OLPC XO detected, forcing relative protocol.\n");
1692 absolute_mode = false;
1693 }
1694
1695 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1696 if (error)
1697 return error;
1698
1699 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1700}
1701
1702#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1703
1704void __init synaptics_module_init(void)
1705{
1706}
1707
1708static int __maybe_unused
1709synaptics_setup_ps2(struct psmouse *psmouse,
1710 struct synaptics_device_info *info)
1711{
1712 return -ENOSYS;
1713}
1714
1715#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1716
1717#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1718
1719/*
1720 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1721 * provides a better bandwidth and allow a better control of the touchpads.
1722 * This is used to decide if we need to use this bus or not.
1723 */
1724enum {
1725 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1726 SYNAPTICS_INTERTOUCH_OFF,
1727 SYNAPTICS_INTERTOUCH_ON,
1728};
1729
1730static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1731 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1732module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1733MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1734
1735static int synaptics_create_intertouch(struct psmouse *psmouse,
1736 struct synaptics_device_info *info,
1737 bool leave_breadcrumbs)
1738{
1739 bool topbuttonpad =
1740 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1741 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1742 const struct rmi_device_platform_data pdata = {
1743 .sensor_pdata = {
1744 .sensor_type = rmi_sensor_touchpad,
1745 .axis_align.flip_y = true,
1746 .kernel_tracking = false,
1747 .topbuttonpad = topbuttonpad,
1748 },
1749 .f30_data = {
1750 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1751 .trackstick_buttons =
1752 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1753 },
1754 };
1755 const struct i2c_board_info intertouch_board = {
1756 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1757 .flags = I2C_CLIENT_HOST_NOTIFY,
1758 };
1759
1760 return psmouse_smbus_init(psmouse, &intertouch_board,
1761 &pdata, sizeof(pdata), true,
1762 leave_breadcrumbs);
1763}
1764
1765/**
1766 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1767 * and decides to instantiate a SMBus InterTouch device.
1768 */
1769static int synaptics_setup_intertouch(struct psmouse *psmouse,
1770 struct synaptics_device_info *info,
1771 bool leave_breadcrumbs)
1772{
1773 int error;
1774
1775 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1776 return -ENXIO;
1777
1778 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1779 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1780 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1781
1782 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1783 psmouse_info(psmouse,
1784 "Your touchpad (%s) says it can support a different bus. "
1785 "If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-input@vger.kernel.org.\n",
1786 psmouse->ps2dev.serio->firmware_id);
1787
1788 return -ENXIO;
1789 }
1790 }
1791
1792 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1793
1794 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1795 if (error) {
1796 if (error == -EAGAIN)
1797 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1798 else
1799 psmouse_err(psmouse, "unable to create intertouch device\n");
1800
1801 return error;
1802 }
1803
1804 return 0;
1805}
1806
1807int synaptics_init_smbus(struct psmouse *psmouse)
1808{
1809 struct synaptics_device_info info;
1810 int error;
1811
1812 psmouse_reset(psmouse);
1813
1814 error = synaptics_query_hardware(psmouse, &info);
1815 if (error) {
1816 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1817 return error;
1818 }
1819
1820 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1821 return -ENXIO;
1822
1823 return synaptics_create_intertouch(psmouse, &info, false);
1824}
1825
1826#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1827
1828static int __maybe_unused
1829synaptics_setup_intertouch(struct psmouse *psmouse,
1830 struct synaptics_device_info *info,
1831 bool leave_breadcrumbs)
1832{
1833 return -ENOSYS;
1834}
1835
1836int synaptics_init_smbus(struct psmouse *psmouse)
1837{
1838 return -ENOSYS;
1839}
1840
1841#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1842
1843#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1844 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1845
1846int synaptics_init(struct psmouse *psmouse)
1847{
1848 struct synaptics_device_info info;
1849 int error;
1850 int retval;
1851
1852 psmouse_reset(psmouse);
1853
1854 error = synaptics_query_hardware(psmouse, &info);
1855 if (error) {
1856 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1857 return error;
1858 }
1859
1860 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1861 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1862 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1863 /* Forcepads need F21, which is not ready */
1864 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1865 psmouse_warn(psmouse,
1866 "The touchpad can support a better bus than the too old PS/2 protocol. "
1867 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1868 }
1869
1870 error = synaptics_setup_intertouch(psmouse, &info, true);
1871 if (!error)
1872 return PSMOUSE_SYNAPTICS_SMBUS;
1873 }
1874
1875 retval = synaptics_setup_ps2(psmouse, &info);
1876 if (retval < 0) {
1877 /*
1878 * Not using any flavor of Synaptics support, so clean up
1879 * SMbus breadcrumbs, if any.
1880 */
1881 psmouse_smbus_cleanup(psmouse);
1882 }
1883
1884 return retval;
1885}
1886
1887#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1888
1889int synaptics_init(struct psmouse *psmouse)
1890{
1891 return -ENOSYS;
1892}
1893
1894#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */