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(ps2dev: &psmouse->ps2dev, command: mode);
85 if (error)
86 return error;
87
88 param[0] = SYN_PS_SET_MODE2;
89 error = ps2_command(ps2dev: &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, mode: 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 "LEN2000", /* S540 */
150 "LEN2001", /* Edge E431 */
151 "LEN2002", /* Edge E531 */
152 "LEN2003",
153 "LEN2004", /* L440 */
154 "LEN2005",
155 "LEN2006", /* Edge E440/E540 */
156 "LEN2007",
157 "LEN2008",
158 "LEN2009",
159 "LEN200A",
160 "LEN200B",
161 NULL
162};
163
164#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
165static const char * const smbus_pnp_ids[] = {
166 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
167 "DLL060d", /* Dell Precision M3800 */
168 "LEN0048", /* X1 Carbon 3 */
169 "LEN0046", /* X250 */
170 "LEN0049", /* Yoga 11e */
171 "LEN004a", /* W541 */
172 "LEN005b", /* P50 */
173 "LEN005e", /* T560 */
174 "LEN006c", /* T470s */
175 "LEN007a", /* T470s */
176 "LEN0071", /* T480 */
177 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
178 "LEN0073", /* X1 Carbon G5 (Elantech) */
179 "LEN0091", /* X1 Carbon 6 */
180 "LEN0092", /* X1 Carbon 6 */
181 "LEN0093", /* T480 */
182 "LEN0096", /* X280 */
183 "LEN0097", /* X280 -> ALPS trackpoint */
184 "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
185 "LEN009b", /* T580 */
186 "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
187 "LEN040f", /* P1 Gen 3 */
188 "LEN0411", /* L14 Gen 1 */
189 "LEN200f", /* T450s */
190 "LEN2044", /* L470 */
191 "LEN2054", /* E480 */
192 "LEN2055", /* E580 */
193 "LEN2068", /* T14 Gen 1 */
194 "SYN1221", /* TUXEDO InfinityBook Pro 14 v5 */
195 "SYN3003", /* HP EliteBook 850 G1 */
196 "SYN3015", /* HP EliteBook 840 G2 */
197 "SYN3052", /* HP EliteBook 840 G4 */
198 "SYN3221", /* HP 15-ay000 */
199 "SYN323d", /* HP Spectre X360 13-w013dx */
200 "SYN3257", /* HP Envy 13-ad105ng */
201 "TOS01f6", /* Dynabook Portege X30L-G */
202 "TOS0213", /* Dynabook Portege X30-D */
203 NULL
204};
205#endif
206
207static const char * const forcepad_pnp_ids[] = {
208 "SYN300D",
209 "SYN3014",
210 NULL
211};
212
213/*
214 * Send a command to the synaptics touchpad by special commands
215 */
216static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
217{
218 int error;
219
220 error = ps2_sliced_command(ps2dev: &psmouse->ps2dev, command: cmd);
221 if (error)
222 return error;
223
224 error = ps2_command(ps2dev: &psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
225 if (error)
226 return error;
227
228 return 0;
229}
230
231static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
232{
233 int error;
234 union {
235 __be32 be_val;
236 char buf[4];
237 } resp = { 0 };
238
239 error = synaptics_send_cmd(psmouse, cmd: query_cmd, param: resp.buf + 1);
240 if (error)
241 return error;
242
243 *val = be32_to_cpu(resp.be_val);
244 return 0;
245}
246
247/*
248 * Identify Touchpad
249 * See also the SYN_ID_* macros
250 */
251static int synaptics_identify(struct psmouse *psmouse,
252 struct synaptics_device_info *info)
253{
254 int error;
255
256 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, val: &info->identity);
257 if (error)
258 return error;
259
260 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
261}
262
263/*
264 * Read the model-id bytes from the touchpad
265 * see also SYN_MODEL_* macros
266 */
267static int synaptics_model_id(struct psmouse *psmouse,
268 struct synaptics_device_info *info)
269{
270 return synaptics_query_int(psmouse, SYN_QUE_MODEL, val: &info->model_id);
271}
272
273/*
274 * Read the firmware id from the touchpad
275 */
276static int synaptics_firmware_id(struct psmouse *psmouse,
277 struct synaptics_device_info *info)
278{
279 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
280 val: &info->firmware_id);
281}
282
283/*
284 * Read the board id and the "More Extended Queries" from the touchpad
285 * The board id is encoded in the "QUERY MODES" response
286 */
287static int synaptics_query_modes(struct psmouse *psmouse,
288 struct synaptics_device_info *info)
289{
290 u8 bid[3];
291 int error;
292
293 /* firmwares prior 7.5 have no board_id encoded */
294 if (SYN_ID_FULL(info->identity) < 0x705)
295 return 0;
296
297 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, param: bid);
298 if (error)
299 return error;
300
301 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
302
303 if (SYN_MEXT_CAP_BIT(bid[0]))
304 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
305 val: &info->ext_cap_10);
306
307 return 0;
308}
309
310/*
311 * Read the capability-bits from the touchpad
312 * see also the SYN_CAP_* macros
313 */
314static int synaptics_capability(struct psmouse *psmouse,
315 struct synaptics_device_info *info)
316{
317 int error;
318
319 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
320 val: &info->capabilities);
321 if (error)
322 return error;
323
324 info->ext_cap = info->ext_cap_0c = 0;
325
326 /*
327 * Older firmwares had submodel ID fixed to 0x47
328 */
329 if (SYN_ID_FULL(info->identity) < 0x705 &&
330 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
331 return -ENXIO;
332 }
333
334 /*
335 * Unless capExtended is set the rest of the flags should be ignored
336 */
337 if (!SYN_CAP_EXTENDED(info->capabilities))
338 info->capabilities = 0;
339
340 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
341 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
342 val: &info->ext_cap);
343 if (error) {
344 psmouse_warn(psmouse,
345 "device claims to have extended capabilities, but I'm not able to read them.\n");
346 } else {
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(info->ext_cap) > 8)
352 info->ext_cap &= ~SYN_CAP_MB_MASK;
353 }
354 }
355
356 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
357 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
358 val: &info->ext_cap_0c);
359 if (error)
360 psmouse_warn(psmouse,
361 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
362 }
363
364 return 0;
365}
366
367/*
368 * Read touchpad resolution and maximum reported coordinates
369 * Resolution is left zero if touchpad does not support the query
370 */
371static int synaptics_resolution(struct psmouse *psmouse,
372 struct synaptics_device_info *info)
373{
374 u8 resp[3];
375 int error;
376
377 if (SYN_ID_MAJOR(info->identity) < 4)
378 return 0;
379
380 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, param: resp);
381 if (!error) {
382 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
383 info->x_res = resp[0]; /* x resolution in units/mm */
384 info->y_res = resp[2]; /* y resolution in units/mm */
385 }
386 }
387
388 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
389 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
390 error = synaptics_send_cmd(psmouse,
391 SYN_QUE_EXT_MAX_COORDS, param: resp);
392 if (error) {
393 psmouse_warn(psmouse,
394 "device claims to have max coordinates query, but I'm not able to read it.\n");
395 } else {
396 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
397 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
398 psmouse_info(psmouse,
399 "queried max coordinates: x [..%d], y [..%d]\n",
400 info->x_max, info->y_max);
401 }
402 }
403
404 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
405 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
406 /*
407 * Firmware v8.1 does not report proper number of extended
408 * capabilities, but has been proven to report correct min
409 * coordinates.
410 */
411 SYN_ID_FULL(info->identity) == 0x801)) {
412 error = synaptics_send_cmd(psmouse,
413 SYN_QUE_EXT_MIN_COORDS, param: resp);
414 if (error) {
415 psmouse_warn(psmouse,
416 "device claims to have min coordinates query, but I'm not able to read it.\n");
417 } else {
418 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
419 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
420 psmouse_info(psmouse,
421 "queried min coordinates: x [%d..], y [%d..]\n",
422 info->x_min, info->y_min);
423 }
424 }
425
426 return 0;
427}
428
429static int synaptics_query_hardware(struct psmouse *psmouse,
430 struct synaptics_device_info *info)
431{
432 int error;
433
434 memset(s: info, c: 0, n: sizeof(*info));
435
436 error = synaptics_identify(psmouse, info);
437 if (error)
438 return error;
439
440 error = synaptics_model_id(psmouse, info);
441 if (error)
442 return error;
443
444 error = synaptics_firmware_id(psmouse, info);
445 if (error)
446 return error;
447
448 error = synaptics_query_modes(psmouse, info);
449 if (error)
450 return error;
451
452 error = synaptics_capability(psmouse, info);
453 if (error)
454 return error;
455
456 error = synaptics_resolution(psmouse, info);
457 if (error)
458 return error;
459
460 return 0;
461}
462
463#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
464
465#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
466
467static bool cr48_profile_sensor;
468
469#define ANY_BOARD_ID 0
470struct min_max_quirk {
471 const char * const *pnp_ids;
472 struct {
473 u32 min, max;
474 } board_id;
475 u32 x_min, x_max, y_min, y_max;
476};
477
478static const struct min_max_quirk min_max_pnpid_table[] = {
479 {
480 (const char * const []){"LEN0033", NULL},
481 {ANY_BOARD_ID, ANY_BOARD_ID},
482 1024, 5052, 2258, 4832
483 },
484 {
485 (const char * const []){"LEN0042", NULL},
486 {ANY_BOARD_ID, ANY_BOARD_ID},
487 1232, 5710, 1156, 4696
488 },
489 {
490 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
491 "LEN0039", "LEN2002", "LEN2004",
492 NULL},
493 {ANY_BOARD_ID, .max: 2961},
494 1024, 5112, 2024, 4832
495 },
496 {
497 (const char * const []){"LEN2000", NULL},
498 {ANY_BOARD_ID, ANY_BOARD_ID},
499 1024, 5113, 2021, 4832
500 },
501 {
502 (const char * const []){"LEN2001", NULL},
503 {ANY_BOARD_ID, ANY_BOARD_ID},
504 1024, 5022, 2508, 4832
505 },
506 {
507 (const char * const []){"LEN2006", NULL},
508 {.min: 2691, .max: 2691},
509 1024, 5045, 2457, 4832
510 },
511 {
512 (const char * const []){"LEN2006", NULL},
513 {ANY_BOARD_ID, ANY_BOARD_ID},
514 1264, 5675, 1171, 4688
515 },
516 { }
517};
518
519/*****************************************************************************
520 * Synaptics communications functions
521 ****************************************************************************/
522
523/*
524 * Synaptics touchpads report the y coordinate from bottom to top, which is
525 * opposite from what userspace expects.
526 * This function is used to invert y before reporting.
527 */
528static int synaptics_invert_y(int y)
529{
530 return YMAX_NOMINAL + YMIN_NOMINAL - y;
531}
532
533/*
534 * Apply quirk(s) if the hardware matches
535 */
536static void synaptics_apply_quirks(struct psmouse *psmouse,
537 struct synaptics_device_info *info)
538{
539 int i;
540
541 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
542 if (!psmouse_matches_pnp_id(psmouse,
543 ids: min_max_pnpid_table[i].pnp_ids))
544 continue;
545
546 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
547 info->board_id < min_max_pnpid_table[i].board_id.min)
548 continue;
549
550 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
551 info->board_id > min_max_pnpid_table[i].board_id.max)
552 continue;
553
554 info->x_min = min_max_pnpid_table[i].x_min;
555 info->x_max = min_max_pnpid_table[i].x_max;
556 info->y_min = min_max_pnpid_table[i].y_min;
557 info->y_max = min_max_pnpid_table[i].y_max;
558 psmouse_info(psmouse,
559 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
560 info->x_min, info->x_max,
561 info->y_min, info->y_max);
562 break;
563 }
564}
565
566static bool synaptics_has_agm(struct synaptics_data *priv)
567{
568 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
569 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
570}
571
572static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
573{
574 static u8 param = 0xc8;
575 int error;
576
577 error = ps2_sliced_command(ps2dev: &psmouse->ps2dev, SYN_QUE_MODEL);
578 if (error)
579 return error;
580
581 error = ps2_command(ps2dev: &psmouse->ps2dev, param: &param, PSMOUSE_CMD_SETRATE);
582 if (error)
583 return error;
584
585 return 0;
586}
587
588static int synaptics_set_mode(struct psmouse *psmouse)
589{
590 struct synaptics_data *priv = psmouse->private;
591 int error;
592
593 priv->mode = 0;
594 if (priv->absolute_mode)
595 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
596 if (priv->disable_gesture)
597 priv->mode |= SYN_BIT_DISABLE_GESTURE;
598 if (psmouse->rate >= 80)
599 priv->mode |= SYN_BIT_HIGH_RATE;
600 if (SYN_CAP_EXTENDED(priv->info.capabilities))
601 priv->mode |= SYN_BIT_W_MODE;
602
603 error = synaptics_mode_cmd(psmouse, mode: priv->mode);
604 if (error)
605 return error;
606
607 if (priv->absolute_mode && synaptics_has_agm(priv)) {
608 error = synaptics_set_advanced_gesture_mode(psmouse);
609 if (error) {
610 psmouse_err(psmouse,
611 "Advanced gesture mode init failed: %d\n",
612 error);
613 return error;
614 }
615 }
616
617 return 0;
618}
619
620static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
621{
622 struct synaptics_data *priv = psmouse->private;
623
624 if (rate >= 80) {
625 priv->mode |= SYN_BIT_HIGH_RATE;
626 psmouse->rate = 80;
627 } else {
628 priv->mode &= ~SYN_BIT_HIGH_RATE;
629 psmouse->rate = 40;
630 }
631
632 synaptics_mode_cmd(psmouse, mode: priv->mode);
633}
634
635/*****************************************************************************
636 * Synaptics pass-through PS/2 port support
637 ****************************************************************************/
638static int synaptics_pt_write(struct serio *serio, u8 c)
639{
640 struct psmouse *parent = psmouse_from_serio(serio: serio->parent);
641 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
642 int error;
643
644 error = ps2_sliced_command(ps2dev: &parent->ps2dev, command: c);
645 if (error)
646 return error;
647
648 error = ps2_command(ps2dev: &parent->ps2dev, param: &rate_param, PSMOUSE_CMD_SETRATE);
649 if (error)
650 return error;
651
652 return 0;
653}
654
655static int synaptics_pt_start(struct serio *serio)
656{
657 struct psmouse *parent = psmouse_from_serio(serio: serio->parent);
658 struct synaptics_data *priv = parent->private;
659
660 guard(serio_pause_rx)(T: parent->ps2dev.serio);
661 priv->pt_port = serio;
662
663 return 0;
664}
665
666static void synaptics_pt_stop(struct serio *serio)
667{
668 struct psmouse *parent = psmouse_from_serio(serio: serio->parent);
669 struct synaptics_data *priv = parent->private;
670
671 guard(serio_pause_rx)(T: parent->ps2dev.serio);
672 priv->pt_port = NULL;
673}
674
675static int synaptics_pt_open(struct serio *serio)
676{
677 struct psmouse *parent = psmouse_from_serio(serio: serio->parent);
678 struct synaptics_data *priv = parent->private;
679
680 guard(serio_pause_rx)(T: parent->ps2dev.serio);
681 priv->pt_port_open = true;
682
683 return 0;
684}
685
686static void synaptics_pt_close(struct serio *serio)
687{
688 struct psmouse *parent = psmouse_from_serio(serio: serio->parent);
689 struct synaptics_data *priv = parent->private;
690
691 guard(serio_pause_rx)(T: parent->ps2dev.serio);
692 priv->pt_port_open = false;
693}
694
695static int synaptics_is_pt_packet(u8 *buf)
696{
697 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
698}
699
700static void synaptics_pass_pt_packet(struct synaptics_data *priv, u8 *packet)
701{
702 struct serio *ptport;
703
704 ptport = priv->pt_port;
705 if (!ptport)
706 return;
707
708 serio_interrupt(serio: ptport, data: packet[1], flags: 0);
709
710 if (priv->pt_port_open) {
711 struct psmouse *child = psmouse_from_serio(serio: ptport);
712
713 if (child->state == PSMOUSE_ACTIVATED) {
714 serio_interrupt(serio: ptport, data: packet[4], flags: 0);
715 serio_interrupt(serio: ptport, data: packet[5], flags: 0);
716 if (child->pktsize == 4)
717 serio_interrupt(serio: ptport, data: packet[2], flags: 0);
718 }
719 }
720}
721
722static void synaptics_pt_activate(struct psmouse *psmouse)
723{
724 struct synaptics_data *priv = psmouse->private;
725 struct psmouse *child = psmouse_from_serio(serio: priv->pt_port);
726
727 /* adjust the touchpad to child's choice of protocol */
728 if (child) {
729 if (child->pktsize == 4)
730 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
731 else
732 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
733
734 if (synaptics_mode_cmd(psmouse, mode: priv->mode))
735 psmouse_warn(psmouse,
736 "failed to switch guest protocol\n");
737 }
738}
739
740static void synaptics_pt_create(struct psmouse *psmouse)
741{
742 struct serio *serio;
743
744 serio = kzalloc(sizeof(*serio), GFP_KERNEL);
745 if (!serio) {
746 psmouse_err(psmouse,
747 "not enough memory for pass-through port\n");
748 return;
749 }
750
751 serio->id.type = SERIO_PS_PSTHRU;
752 strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
753 strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
754 serio->write = synaptics_pt_write;
755 serio->start = synaptics_pt_start;
756 serio->stop = synaptics_pt_stop;
757 serio->open = synaptics_pt_open;
758 serio->close = synaptics_pt_close;
759 serio->parent = psmouse->ps2dev.serio;
760
761 psmouse->pt_activate = synaptics_pt_activate;
762
763 psmouse_info(psmouse, "serio: %s port at %s\n",
764 serio->name, psmouse->phys);
765 serio_register_port(serio);
766}
767
768/*****************************************************************************
769 * Functions to interpret the absolute mode packets
770 ****************************************************************************/
771
772static void synaptics_parse_agm(const u8 buf[],
773 struct synaptics_data *priv,
774 struct synaptics_hw_state *hw)
775{
776 struct synaptics_hw_state *agm = &priv->agm;
777 int agm_packet_type;
778
779 agm_packet_type = (buf[5] & 0x30) >> 4;
780 switch (agm_packet_type) {
781 case 1:
782 /* Gesture packet: (x, y, z) half resolution */
783 agm->w = hw->w;
784 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
785 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
786 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
787 break;
788
789 case 2:
790 /* AGM-CONTACT packet: we are only interested in the count */
791 priv->agm_count = buf[1];
792 break;
793
794 default:
795 break;
796 }
797}
798
799static void synaptics_parse_ext_buttons(const u8 buf[],
800 struct synaptics_data *priv,
801 struct synaptics_hw_state *hw)
802{
803 unsigned int ext_bits =
804 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
805 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
806
807 hw->ext_buttons = buf[4] & ext_mask;
808 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
809}
810
811static int synaptics_parse_hw_state(const u8 buf[],
812 struct synaptics_data *priv,
813 struct synaptics_hw_state *hw)
814{
815 memset(s: hw, c: 0, n: sizeof(struct synaptics_hw_state));
816
817 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
818 hw->w = (((buf[0] & 0x30) >> 2) |
819 ((buf[0] & 0x04) >> 1) |
820 ((buf[3] & 0x04) >> 2));
821
822 if (synaptics_has_agm(priv) && hw->w == 2) {
823 synaptics_parse_agm(buf, priv, hw);
824 return 1;
825 }
826
827 hw->x = (((buf[3] & 0x10) << 8) |
828 ((buf[1] & 0x0f) << 8) |
829 buf[4]);
830 hw->y = (((buf[3] & 0x20) << 7) |
831 ((buf[1] & 0xf0) << 4) |
832 buf[5]);
833 hw->z = buf[2];
834
835 hw->left = (buf[0] & 0x01) ? 1 : 0;
836 hw->right = (buf[0] & 0x02) ? 1 : 0;
837
838 if (priv->is_forcepad) {
839 /*
840 * ForcePads, like Clickpads, use middle button
841 * bits to report primary button clicks.
842 * Unfortunately they report primary button not
843 * only when user presses on the pad above certain
844 * threshold, but also when there are more than one
845 * finger on the touchpad, which interferes with
846 * out multi-finger gestures.
847 */
848 if (hw->z == 0) {
849 /* No contacts */
850 priv->press = priv->report_press = false;
851 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
852 /*
853 * Single-finger touch with pressure above
854 * the threshold. If pressure stays long
855 * enough, we'll start reporting primary
856 * button. We rely on the device continuing
857 * sending data even if finger does not
858 * move.
859 */
860 if (!priv->press) {
861 priv->press_start = jiffies;
862 priv->press = true;
863 } else if (time_after(jiffies,
864 priv->press_start +
865 msecs_to_jiffies(50))) {
866 priv->report_press = true;
867 }
868 } else {
869 priv->press = false;
870 }
871
872 hw->left = priv->report_press;
873
874 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
875 /*
876 * Clickpad's button is transmitted as middle button,
877 * however, since it is primary button, we will report
878 * it as BTN_LEFT.
879 */
880 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
881
882 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
883 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
884 if (hw->w == 2)
885 hw->scroll = (s8)buf[1];
886 }
887
888 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
889 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
890 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
891 }
892
893 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
894 ((buf[0] ^ buf[3]) & 0x02)) {
895 synaptics_parse_ext_buttons(buf, priv, hw);
896 }
897 } else {
898 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
899 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
900
901 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
902 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
903
904 hw->left = (buf[0] & 0x01) ? 1 : 0;
905 hw->right = (buf[0] & 0x02) ? 1 : 0;
906 }
907
908 /*
909 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
910 * is used by some firmware to indicate a finger at the edge of
911 * the touchpad whose precise position cannot be determined, so
912 * convert these values to the maximum axis value.
913 */
914 if (hw->x > X_MAX_POSITIVE)
915 hw->x -= 1 << ABS_POS_BITS;
916 else if (hw->x == X_MAX_POSITIVE)
917 hw->x = XMAX;
918
919 if (hw->y > Y_MAX_POSITIVE)
920 hw->y -= 1 << ABS_POS_BITS;
921 else if (hw->y == Y_MAX_POSITIVE)
922 hw->y = YMAX;
923
924 return 0;
925}
926
927static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
928 bool active, int x, int y)
929{
930 input_mt_slot(dev, slot);
931 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
932 if (active) {
933 input_report_abs(dev, ABS_MT_POSITION_X, value: x);
934 input_report_abs(dev, ABS_MT_POSITION_Y, value: synaptics_invert_y(y));
935 }
936}
937
938static void synaptics_report_semi_mt_data(struct input_dev *dev,
939 const struct synaptics_hw_state *a,
940 const struct synaptics_hw_state *b,
941 int num_fingers)
942{
943 if (num_fingers >= 2) {
944 synaptics_report_semi_mt_slot(dev, slot: 0, active: true, min(a->x, b->x),
945 min(a->y, b->y));
946 synaptics_report_semi_mt_slot(dev, slot: 1, active: true, max(a->x, b->x),
947 max(a->y, b->y));
948 } else if (num_fingers == 1) {
949 synaptics_report_semi_mt_slot(dev, slot: 0, active: true, x: a->x, y: a->y);
950 synaptics_report_semi_mt_slot(dev, slot: 1, active: false, x: 0, y: 0);
951 } else {
952 synaptics_report_semi_mt_slot(dev, slot: 0, active: false, x: 0, y: 0);
953 synaptics_report_semi_mt_slot(dev, slot: 1, active: false, x: 0, y: 0);
954 }
955}
956
957static void synaptics_report_ext_buttons(struct psmouse *psmouse,
958 const struct synaptics_hw_state *hw)
959{
960 struct input_dev *dev = psmouse->dev;
961 struct synaptics_data *priv = psmouse->private;
962 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
963 int i;
964
965 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
966 return;
967
968 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
969 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
970 SYN_ID_FULL(priv->info.identity) == 0x802) &&
971 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
972 return;
973
974 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
975 for (i = 0; i < ext_bits; i++) {
976 input_report_key(dev, BTN_0 + 2 * i,
977 value: hw->ext_buttons & BIT(i));
978 input_report_key(dev, BTN_1 + 2 * i,
979 value: hw->ext_buttons & BIT(i + ext_bits));
980 }
981 return;
982 }
983
984 /*
985 * This generation of touchpads has the trackstick buttons
986 * physically wired to the touchpad. Re-route them through
987 * the pass-through interface.
988 */
989 if (priv->pt_port) {
990 u8 pt_buttons;
991
992 /* The trackstick expects at most 3 buttons */
993 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
994 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
995 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
996
997 serio_interrupt(serio: priv->pt_port,
998 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
999 serio_interrupt(serio: priv->pt_port, data: pt_buttons, SERIO_OOB_DATA);
1000 }
1001}
1002
1003static void synaptics_report_buttons(struct psmouse *psmouse,
1004 const struct synaptics_hw_state *hw)
1005{
1006 struct input_dev *dev = psmouse->dev;
1007 struct synaptics_data *priv = psmouse->private;
1008
1009 input_report_key(dev, BTN_LEFT, value: hw->left);
1010 input_report_key(dev, BTN_RIGHT, value: hw->right);
1011
1012 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
1013 input_report_key(dev, BTN_MIDDLE, value: hw->middle);
1014
1015 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
1016 input_report_key(dev, BTN_FORWARD, value: hw->up);
1017 input_report_key(dev, BTN_BACK, value: hw->down);
1018 }
1019
1020 synaptics_report_ext_buttons(psmouse, hw);
1021}
1022
1023static void synaptics_report_mt_data(struct psmouse *psmouse,
1024 const struct synaptics_hw_state *sgm,
1025 int num_fingers)
1026{
1027 struct input_dev *dev = psmouse->dev;
1028 struct synaptics_data *priv = psmouse->private;
1029 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1030 struct input_mt_pos pos[2];
1031 int slot[2], nsemi, i;
1032
1033 nsemi = clamp_val(num_fingers, 0, 2);
1034
1035 for (i = 0; i < nsemi; i++) {
1036 pos[i].x = hw[i]->x;
1037 pos[i].y = synaptics_invert_y(y: hw[i]->y);
1038 }
1039
1040 input_mt_assign_slots(dev, slots: slot, pos, num_pos: nsemi, DMAX * priv->info.x_res);
1041
1042 for (i = 0; i < nsemi; i++) {
1043 input_mt_slot(dev, slot: slot[i]);
1044 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active: true);
1045 input_report_abs(dev, ABS_MT_POSITION_X, value: pos[i].x);
1046 input_report_abs(dev, ABS_MT_POSITION_Y, value: pos[i].y);
1047 input_report_abs(dev, ABS_MT_PRESSURE, value: hw[i]->z);
1048 }
1049
1050 input_mt_drop_unused(dev);
1051
1052 /* Don't use active slot count to generate BTN_TOOL events. */
1053 input_mt_report_pointer_emulation(dev, use_count: false);
1054
1055 /* Send the number of fingers reported by touchpad itself. */
1056 input_mt_report_finger_count(dev, count: num_fingers);
1057
1058 synaptics_report_buttons(psmouse, hw: sgm);
1059
1060 input_sync(dev);
1061}
1062
1063static void synaptics_image_sensor_process(struct psmouse *psmouse,
1064 struct synaptics_hw_state *sgm)
1065{
1066 struct synaptics_data *priv = psmouse->private;
1067 int num_fingers;
1068
1069 /*
1070 * Update mt_state using the new finger count and current mt_state.
1071 */
1072 if (sgm->z == 0)
1073 num_fingers = 0;
1074 else if (sgm->w >= 4)
1075 num_fingers = 1;
1076 else if (sgm->w == 0)
1077 num_fingers = 2;
1078 else if (sgm->w == 1)
1079 num_fingers = priv->agm_count ? priv->agm_count : 3;
1080 else
1081 num_fingers = 4;
1082
1083 /* Send resulting input events to user space */
1084 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1085}
1086
1087static bool synaptics_has_multifinger(struct synaptics_data *priv)
1088{
1089 if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1090 return true;
1091
1092 /* Advanced gesture mode also sends multi finger data */
1093 return synaptics_has_agm(priv);
1094}
1095
1096/*
1097 * called for each full received packet from the touchpad
1098 */
1099static void synaptics_process_packet(struct psmouse *psmouse)
1100{
1101 struct input_dev *dev = psmouse->dev;
1102 struct synaptics_data *priv = psmouse->private;
1103 struct synaptics_device_info *info = &priv->info;
1104 struct synaptics_hw_state hw;
1105 int num_fingers;
1106 int finger_width;
1107
1108 if (synaptics_parse_hw_state(buf: psmouse->packet, priv, hw: &hw))
1109 return;
1110
1111 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1112 synaptics_image_sensor_process(psmouse, sgm: &hw);
1113 return;
1114 }
1115
1116 if (hw.scroll) {
1117 priv->scroll += hw.scroll;
1118
1119 while (priv->scroll >= 4) {
1120 input_report_key(dev, BTN_BACK, value: !hw.down);
1121 input_sync(dev);
1122 input_report_key(dev, BTN_BACK, value: hw.down);
1123 input_sync(dev);
1124 priv->scroll -= 4;
1125 }
1126 while (priv->scroll <= -4) {
1127 input_report_key(dev, BTN_FORWARD, value: !hw.up);
1128 input_sync(dev);
1129 input_report_key(dev, BTN_FORWARD, value: hw.up);
1130 input_sync(dev);
1131 priv->scroll += 4;
1132 }
1133 return;
1134 }
1135
1136 if (hw.z > 0 && hw.x > 1) {
1137 num_fingers = 1;
1138 finger_width = 5;
1139 if (SYN_CAP_EXTENDED(info->capabilities)) {
1140 switch (hw.w) {
1141 case 0 ... 1:
1142 if (synaptics_has_multifinger(priv))
1143 num_fingers = hw.w + 2;
1144 break;
1145 case 2:
1146 /*
1147 * SYN_MODEL_PEN(info->model_id): even if
1148 * the device supports pen, we treat it as
1149 * a single finger.
1150 */
1151 break;
1152 case 4 ... 15:
1153 if (SYN_CAP_PALMDETECT(info->capabilities))
1154 finger_width = hw.w;
1155 break;
1156 }
1157 }
1158 } else {
1159 num_fingers = 0;
1160 finger_width = 0;
1161 }
1162
1163 if (cr48_profile_sensor) {
1164 synaptics_report_mt_data(psmouse, sgm: &hw, num_fingers);
1165 return;
1166 }
1167
1168 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1169 synaptics_report_semi_mt_data(dev, a: &hw, b: &priv->agm,
1170 num_fingers);
1171
1172 /* Post events
1173 * BTN_TOUCH has to be first as mousedev relies on it when doing
1174 * absolute -> relative conversion
1175 */
1176 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, value: 1);
1177 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, value: 0);
1178
1179 if (num_fingers > 0) {
1180 input_report_abs(dev, ABS_X, value: hw.x);
1181 input_report_abs(dev, ABS_Y, value: synaptics_invert_y(y: hw.y));
1182 }
1183 input_report_abs(dev, ABS_PRESSURE, value: hw.z);
1184
1185 if (SYN_CAP_PALMDETECT(info->capabilities))
1186 input_report_abs(dev, ABS_TOOL_WIDTH, value: finger_width);
1187
1188 input_report_key(dev, BTN_TOOL_FINGER, value: num_fingers == 1);
1189 if (synaptics_has_multifinger(priv)) {
1190 input_report_key(dev, BTN_TOOL_DOUBLETAP, value: num_fingers == 2);
1191 input_report_key(dev, BTN_TOOL_TRIPLETAP, value: num_fingers == 3);
1192 }
1193
1194 synaptics_report_buttons(psmouse, hw: &hw);
1195
1196 input_sync(dev);
1197}
1198
1199static bool synaptics_validate_byte(struct psmouse *psmouse,
1200 int idx, enum synaptics_pkt_type pkt_type)
1201{
1202 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1203 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1204 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1205 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1206 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1207 const u8 *packet = psmouse->packet;
1208
1209 if (idx < 0 || idx > 4)
1210 return false;
1211
1212 switch (pkt_type) {
1213
1214 case SYN_NEWABS:
1215 case SYN_NEWABS_RELAXED:
1216 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1217
1218 case SYN_NEWABS_STRICT:
1219 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1220
1221 case SYN_OLDABS:
1222 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1223
1224 default:
1225 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1226 return false;
1227 }
1228}
1229
1230static enum synaptics_pkt_type
1231synaptics_detect_pkt_type(struct psmouse *psmouse)
1232{
1233 int i;
1234
1235 for (i = 0; i < 5; i++) {
1236 if (!synaptics_validate_byte(psmouse, idx: i, pkt_type: SYN_NEWABS_STRICT)) {
1237 psmouse_info(psmouse, "using relaxed packet validation\n");
1238 return SYN_NEWABS_RELAXED;
1239 }
1240 }
1241
1242 return SYN_NEWABS_STRICT;
1243}
1244
1245static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1246{
1247 struct synaptics_data *priv = psmouse->private;
1248
1249 if (psmouse->pktcnt >= 6) { /* Full packet received */
1250 if (unlikely(priv->pkt_type == SYN_NEWABS))
1251 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1252
1253 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1254 synaptics_is_pt_packet(buf: psmouse->packet)) {
1255 synaptics_pass_pt_packet(priv, packet: psmouse->packet);
1256 } else {
1257 synaptics_process_packet(psmouse);
1258 }
1259
1260 return PSMOUSE_FULL_PACKET;
1261 }
1262
1263 return synaptics_validate_byte(psmouse, idx: psmouse->pktcnt - 1, pkt_type: priv->pkt_type) ?
1264 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1265}
1266
1267/*****************************************************************************
1268 * Driver initialization/cleanup functions
1269 ****************************************************************************/
1270static void set_abs_position_params(struct input_dev *dev,
1271 struct synaptics_device_info *info,
1272 int x_code, int y_code)
1273{
1274 int x_min = info->x_min ?: XMIN_NOMINAL;
1275 int x_max = info->x_max ?: XMAX_NOMINAL;
1276 int y_min = info->y_min ?: YMIN_NOMINAL;
1277 int y_max = info->y_max ?: YMAX_NOMINAL;
1278 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1279 SYN_REDUCED_FILTER_FUZZ : 0;
1280
1281 input_set_abs_params(dev, axis: x_code, min: x_min, max: x_max, fuzz, flat: 0);
1282 input_set_abs_params(dev, axis: y_code, min: y_min, max: y_max, fuzz, flat: 0);
1283 input_abs_set_res(dev, axis: x_code, val: info->x_res);
1284 input_abs_set_res(dev, axis: y_code, val: info->y_res);
1285}
1286
1287static int set_input_params(struct psmouse *psmouse,
1288 struct synaptics_data *priv)
1289{
1290 struct input_dev *dev = psmouse->dev;
1291 struct synaptics_device_info *info = &priv->info;
1292 int i;
1293 int error;
1294
1295 /* Reset default psmouse capabilities */
1296 __clear_bit(EV_REL, dev->evbit);
1297 bitmap_zero(dst: dev->relbit, REL_CNT);
1298 bitmap_zero(dst: dev->keybit, KEY_CNT);
1299
1300 /* Things that apply to both modes */
1301 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1302
1303 input_set_capability(dev, EV_KEY, BTN_LEFT);
1304
1305 /* Clickpads report only left button */
1306 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1307 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1308 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1309 input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1310 }
1311
1312 if (!priv->absolute_mode) {
1313 /* Relative mode */
1314 input_set_capability(dev, EV_REL, REL_X);
1315 input_set_capability(dev, EV_REL, REL_Y);
1316 return 0;
1317 }
1318
1319 /* Absolute mode */
1320 set_abs_position_params(dev, info: &priv->info, ABS_X, ABS_Y);
1321 input_set_abs_params(dev, ABS_PRESSURE, min: 0, max: 255, fuzz: 0, flat: 0);
1322
1323 if (cr48_profile_sensor)
1324 input_set_abs_params(dev, ABS_MT_PRESSURE, min: 0, max: 255, fuzz: 0, flat: 0);
1325
1326 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1327 set_abs_position_params(dev, info,
1328 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1329 /* Image sensors can report per-contact pressure */
1330 input_set_abs_params(dev, ABS_MT_PRESSURE, min: 0, max: 255, fuzz: 0, flat: 0);
1331
1332 error = input_mt_init_slots(dev, num_slots: 2,
1333 INPUT_MT_POINTER | INPUT_MT_TRACK);
1334 if (error)
1335 return error;
1336
1337 /* Image sensors can signal 4 and 5 finger clicks */
1338 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1339 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1340 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1341 set_abs_position_params(dev, info,
1342 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1343 /*
1344 * Profile sensor in CR-48 tracks contacts reasonably well,
1345 * other non-image sensors with AGM use semi-mt.
1346 */
1347 error = input_mt_init_slots(dev, num_slots: 2,
1348 INPUT_MT_POINTER |
1349 (cr48_profile_sensor ?
1350 INPUT_MT_TRACK :
1351 INPUT_MT_SEMI_MT));
1352 if (error)
1353 return error;
1354
1355 /*
1356 * For semi-mt devices we send ABS_X/Y ourselves instead of
1357 * input_mt_report_pointer_emulation. But
1358 * input_mt_init_slots() resets the fuzz to 0, leading to a
1359 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1360 * position. Let's re-initialize ABS_X/Y here.
1361 */
1362 if (!cr48_profile_sensor)
1363 set_abs_position_params(dev, info: &priv->info, ABS_X, ABS_Y);
1364 }
1365
1366 if (SYN_CAP_PALMDETECT(info->capabilities))
1367 input_set_abs_params(dev, ABS_TOOL_WIDTH, min: 0, max: 15, fuzz: 0, flat: 0);
1368
1369 input_set_capability(dev, EV_KEY, BTN_TOUCH);
1370 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1371
1372 if (synaptics_has_multifinger(priv)) {
1373 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1374 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1375 }
1376
1377 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1378 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1379 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1380 input_set_capability(dev, EV_KEY, BTN_BACK);
1381 }
1382
1383 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1384 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1385 input_set_capability(dev, EV_KEY, BTN_0 + i);
1386
1387 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1388 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1389 if (psmouse_matches_pnp_id(psmouse, ids: topbuttonpad_pnp_ids) &&
1390 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1391 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1392 }
1393
1394 return 0;
1395}
1396
1397static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1398 void *data, char *buf)
1399{
1400 struct synaptics_data *priv = psmouse->private;
1401
1402 return sprintf(buf, fmt: "%c\n", priv->disable_gesture ? '1' : '0');
1403}
1404
1405static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1406 void *data, const char *buf,
1407 size_t len)
1408{
1409 struct synaptics_data *priv = psmouse->private;
1410 unsigned int value;
1411 int err;
1412
1413 err = kstrtouint(s: buf, base: 10, res: &value);
1414 if (err)
1415 return err;
1416
1417 if (value > 1)
1418 return -EINVAL;
1419
1420 if (value == priv->disable_gesture)
1421 return len;
1422
1423 priv->disable_gesture = value;
1424 if (value)
1425 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1426 else
1427 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1428
1429 if (synaptics_mode_cmd(psmouse, mode: priv->mode))
1430 return -EIO;
1431
1432 return len;
1433}
1434
1435PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1436 synaptics_show_disable_gesture,
1437 synaptics_set_disable_gesture);
1438
1439static void synaptics_disconnect(struct psmouse *psmouse)
1440{
1441 struct synaptics_data *priv = psmouse->private;
1442
1443 /*
1444 * We might have left a breadcrumb when trying to
1445 * set up SMbus companion.
1446 */
1447 psmouse_smbus_cleanup(psmouse);
1448
1449 if (!priv->absolute_mode &&
1450 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1451 device_remove_file(dev: &psmouse->ps2dev.serio->dev,
1452 attr: &psmouse_attr_disable_gesture.dattr);
1453
1454 synaptics_reset(psmouse);
1455 kfree(objp: priv);
1456 psmouse->private = NULL;
1457}
1458
1459static int synaptics_reconnect(struct psmouse *psmouse)
1460{
1461 struct synaptics_data *priv = psmouse->private;
1462 struct synaptics_device_info info;
1463 u8 param[2];
1464 int retry = 0;
1465 int error;
1466
1467 do {
1468 psmouse_reset(psmouse);
1469 if (retry) {
1470 /*
1471 * On some boxes, right after resuming, the touchpad
1472 * needs some time to finish initializing (I assume
1473 * it needs time to calibrate) and start responding
1474 * to Synaptics-specific queries, so let's wait a
1475 * bit.
1476 */
1477 ssleep(seconds: 1);
1478 }
1479 ps2_command(ps2dev: &psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1480 error = synaptics_detect(psmouse, set_properties: 0);
1481 } while (error && ++retry < 3);
1482
1483 if (error)
1484 return error;
1485
1486 if (retry > 1)
1487 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1488
1489 error = synaptics_query_hardware(psmouse, info: &info);
1490 if (error) {
1491 psmouse_err(psmouse, "Unable to query device.\n");
1492 return error;
1493 }
1494
1495 error = synaptics_set_mode(psmouse);
1496 if (error) {
1497 psmouse_err(psmouse, "Unable to initialize device.\n");
1498 return error;
1499 }
1500
1501 if (info.identity != priv->info.identity ||
1502 info.model_id != priv->info.model_id ||
1503 info.capabilities != priv->info.capabilities ||
1504 info.ext_cap != priv->info.ext_cap) {
1505 psmouse_err(psmouse,
1506 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1507 priv->info.identity, info.identity,
1508 priv->info.model_id, info.model_id,
1509 priv->info.capabilities, info.capabilities,
1510 priv->info.ext_cap, info.ext_cap);
1511 return -ENXIO;
1512 }
1513
1514 return 0;
1515}
1516
1517static bool impaired_toshiba_kbc;
1518
1519static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1520#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1521 {
1522 /* Toshiba Satellite */
1523 .matches = {
1524 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1525 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1526 },
1527 },
1528 {
1529 /* Toshiba Dynabook */
1530 .matches = {
1531 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1532 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1533 },
1534 },
1535 {
1536 /* Toshiba Portege M300 */
1537 .matches = {
1538 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1539 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1540 },
1541
1542 },
1543 {
1544 /* Toshiba Portege M300 */
1545 .matches = {
1546 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1547 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1548 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1549 },
1550
1551 },
1552#endif
1553 { }
1554};
1555
1556static bool broken_olpc_ec;
1557
1558static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1559#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1560 {
1561 /* OLPC XO-1 or XO-1.5 */
1562 .matches = {
1563 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1564 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1565 },
1566 },
1567#endif
1568 { }
1569};
1570
1571static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1572#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1573 {
1574 /* Cr-48 Chromebook (Codename Mario) */
1575 .matches = {
1576 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1577 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1578 },
1579 },
1580#endif
1581 { }
1582};
1583
1584void __init synaptics_module_init(void)
1585{
1586 impaired_toshiba_kbc = dmi_check_system(list: toshiba_dmi_table);
1587 broken_olpc_ec = dmi_check_system(list: olpc_dmi_table);
1588 cr48_profile_sensor = dmi_check_system(list: cr48_dmi_table);
1589}
1590
1591static int synaptics_init_ps2(struct psmouse *psmouse,
1592 struct synaptics_device_info *info,
1593 bool absolute_mode)
1594{
1595 struct synaptics_data *priv;
1596 int err;
1597
1598 synaptics_apply_quirks(psmouse, info);
1599
1600 psmouse->private = priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1601 if (!priv)
1602 return -ENOMEM;
1603
1604 priv->info = *info;
1605 priv->absolute_mode = absolute_mode;
1606 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1607 priv->disable_gesture = true;
1608
1609 /*
1610 * Unfortunately ForcePad capability is not exported over PS/2,
1611 * so we have to resort to checking PNP IDs.
1612 */
1613 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, ids: forcepad_pnp_ids);
1614
1615 err = synaptics_set_mode(psmouse);
1616 if (err) {
1617 psmouse_err(psmouse, "Unable to initialize device.\n");
1618 goto init_fail;
1619 }
1620
1621 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1622 SYN_NEWABS : SYN_OLDABS;
1623
1624 psmouse_info(psmouse,
1625 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1626 SYN_ID_MODEL(info->identity),
1627 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1628 info->model_id,
1629 info->capabilities, info->ext_cap, info->ext_cap_0c,
1630 info->ext_cap_10, info->board_id, info->firmware_id);
1631
1632 err = set_input_params(psmouse, priv);
1633 if (err) {
1634 psmouse_err(psmouse,
1635 "failed to set up capabilities: %d\n", err);
1636 goto init_fail;
1637 }
1638
1639 /*
1640 * Encode touchpad model so that it can be used to set
1641 * input device->id.version and be visible to userspace.
1642 * Because version is __u16 we have to drop something.
1643 * Hardware info bits seem to be good candidates as they
1644 * are documented to be for Synaptics corp. internal use.
1645 */
1646 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1647 (info->model_id & 0x000000ff);
1648
1649 if (absolute_mode) {
1650 psmouse->protocol_handler = synaptics_process_byte;
1651 psmouse->pktsize = 6;
1652 } else {
1653 /* Relative mode follows standard PS/2 mouse protocol */
1654 psmouse->protocol_handler = psmouse_process_byte;
1655 psmouse->pktsize = 3;
1656 }
1657
1658 psmouse->set_rate = synaptics_set_rate;
1659 psmouse->disconnect = synaptics_disconnect;
1660 psmouse->reconnect = synaptics_reconnect;
1661 psmouse->fast_reconnect = NULL;
1662 psmouse->cleanup = synaptics_reset;
1663 /* Synaptics can usually stay in sync without extra help */
1664 psmouse->resync_time = 0;
1665
1666 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1667 synaptics_pt_create(psmouse);
1668
1669 /*
1670 * Toshiba's KBC seems to have trouble handling data from
1671 * Synaptics at full rate. Switch to a lower rate (roughly
1672 * the same rate as a standard PS/2 mouse).
1673 */
1674 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1675 psmouse_info(psmouse,
1676 "Toshiba %s detected, limiting rate to 40pps.\n",
1677 dmi_get_system_info(DMI_PRODUCT_NAME));
1678 psmouse->rate = 40;
1679 }
1680
1681 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1682 err = device_create_file(device: &psmouse->ps2dev.serio->dev,
1683 entry: &psmouse_attr_disable_gesture.dattr);
1684 if (err) {
1685 psmouse_err(psmouse,
1686 "Failed to create disable_gesture attribute (%d)",
1687 err);
1688 goto init_fail;
1689 }
1690 }
1691
1692 return 0;
1693
1694 init_fail:
1695 kfree(objp: priv);
1696 return err;
1697}
1698
1699static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1700{
1701 struct synaptics_device_info info;
1702 int error;
1703
1704 psmouse_reset(psmouse);
1705
1706 error = synaptics_query_hardware(psmouse, info: &info);
1707 if (error) {
1708 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1709 return error;
1710 }
1711
1712 return synaptics_init_ps2(psmouse, info: &info, absolute_mode);
1713}
1714
1715int synaptics_init_absolute(struct psmouse *psmouse)
1716{
1717 return __synaptics_init(psmouse, absolute_mode: true);
1718}
1719
1720int synaptics_init_relative(struct psmouse *psmouse)
1721{
1722 return __synaptics_init(psmouse, absolute_mode: false);
1723}
1724
1725static int synaptics_setup_ps2(struct psmouse *psmouse,
1726 struct synaptics_device_info *info)
1727{
1728 bool absolute_mode = true;
1729 int error;
1730
1731 /*
1732 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1733 * packet spew overloads the EC such that key presses on the keyboard
1734 * are missed. Given that, don't even attempt to use Absolute mode.
1735 * Relative mode seems to work just fine.
1736 */
1737 if (broken_olpc_ec) {
1738 psmouse_info(psmouse,
1739 "OLPC XO detected, forcing relative protocol.\n");
1740 absolute_mode = false;
1741 }
1742
1743 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1744 if (error)
1745 return error;
1746
1747 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1748}
1749
1750#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1751
1752void __init synaptics_module_init(void)
1753{
1754}
1755
1756static int __maybe_unused
1757synaptics_setup_ps2(struct psmouse *psmouse,
1758 struct synaptics_device_info *info)
1759{
1760 return -ENOSYS;
1761}
1762
1763#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1764
1765#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1766
1767/*
1768 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1769 * provides a better bandwidth and allow a better control of the touchpads.
1770 * This is used to decide if we need to use this bus or not.
1771 */
1772enum {
1773 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1774 SYNAPTICS_INTERTOUCH_OFF,
1775 SYNAPTICS_INTERTOUCH_ON,
1776};
1777
1778static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1779 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1780module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1781MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1782
1783static int synaptics_create_intertouch(struct psmouse *psmouse,
1784 struct synaptics_device_info *info,
1785 bool leave_breadcrumbs)
1786{
1787 bool topbuttonpad =
1788 psmouse_matches_pnp_id(psmouse, ids: topbuttonpad_pnp_ids) &&
1789 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1790 const struct rmi_device_platform_data pdata = {
1791 .reset_delay_ms = 30,
1792 .sensor_pdata = {
1793 .sensor_type = rmi_sensor_touchpad,
1794 .axis_align.flip_y = true,
1795 .kernel_tracking = false,
1796 .topbuttonpad = topbuttonpad,
1797 },
1798 .gpio_data = {
1799 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1800 .trackstick_buttons =
1801 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1802 },
1803 };
1804 const struct i2c_board_info intertouch_board = {
1805 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1806 .flags = I2C_CLIENT_HOST_NOTIFY,
1807 };
1808
1809 return psmouse_smbus_init(psmouse, board: &intertouch_board,
1810 pdata: &pdata, pdata_size: sizeof(pdata), need_deactivate: true,
1811 leave_breadcrumbs);
1812}
1813
1814/*
1815 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1816 * and decides to instantiate a SMBus InterTouch device.
1817 */
1818static int synaptics_setup_intertouch(struct psmouse *psmouse,
1819 struct synaptics_device_info *info,
1820 bool leave_breadcrumbs)
1821{
1822 int error;
1823
1824 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1825 return -ENXIO;
1826
1827 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1828 if (!psmouse_matches_pnp_id(psmouse, ids: topbuttonpad_pnp_ids) &&
1829 !psmouse_matches_pnp_id(psmouse, ids: smbus_pnp_ids)) {
1830
1831 if (!psmouse_matches_pnp_id(psmouse, ids: forcepad_pnp_ids))
1832 psmouse_info(psmouse,
1833 "Your touchpad (%s) says it can support a different bus. "
1834 "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",
1835 psmouse->ps2dev.serio->firmware_id);
1836
1837 return -ENXIO;
1838 }
1839 }
1840
1841 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1842
1843 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1844 if (error) {
1845 if (error == -EAGAIN)
1846 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1847 else
1848 psmouse_err(psmouse, "unable to create intertouch device\n");
1849
1850 return error;
1851 }
1852
1853 return 0;
1854}
1855
1856int synaptics_init_smbus(struct psmouse *psmouse)
1857{
1858 struct synaptics_device_info info;
1859 int error;
1860
1861 psmouse_reset(psmouse);
1862
1863 error = synaptics_query_hardware(psmouse, info: &info);
1864 if (error) {
1865 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1866 return error;
1867 }
1868
1869 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1870 return -ENXIO;
1871
1872 return synaptics_create_intertouch(psmouse, info: &info, leave_breadcrumbs: false);
1873}
1874
1875#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1876
1877static int __maybe_unused
1878synaptics_setup_intertouch(struct psmouse *psmouse,
1879 struct synaptics_device_info *info,
1880 bool leave_breadcrumbs)
1881{
1882 return -ENOSYS;
1883}
1884
1885int synaptics_init_smbus(struct psmouse *psmouse)
1886{
1887 return -ENOSYS;
1888}
1889
1890#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1891
1892#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1893 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1894
1895int synaptics_init(struct psmouse *psmouse)
1896{
1897 struct synaptics_device_info info;
1898 int error;
1899 int retval;
1900
1901 psmouse_reset(psmouse);
1902
1903 error = synaptics_query_hardware(psmouse, info: &info);
1904 if (error) {
1905 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1906 return error;
1907 }
1908
1909 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1910 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1911 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1912 /* Forcepads need F21, which is not ready */
1913 !psmouse_matches_pnp_id(psmouse, ids: forcepad_pnp_ids)) {
1914 psmouse_warn(psmouse,
1915 "The touchpad can support a better bus than the too old PS/2 protocol. "
1916 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1917 }
1918
1919 error = synaptics_setup_intertouch(psmouse, info: &info, leave_breadcrumbs: true);
1920 if (!error)
1921 return PSMOUSE_SYNAPTICS_SMBUS;
1922 }
1923
1924 retval = synaptics_setup_ps2(psmouse, info: &info);
1925 if (retval < 0) {
1926 /*
1927 * Not using any flavor of Synaptics support, so clean up
1928 * SMbus breadcrumbs, if any.
1929 */
1930 psmouse_smbus_cleanup(psmouse);
1931 }
1932
1933 return retval;
1934}
1935
1936#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1937
1938int synaptics_init(struct psmouse *psmouse)
1939{
1940 return -ENOSYS;
1941}
1942
1943#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1944