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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 "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
164static const char * const smbus_pnp_ids[] = {
165 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
166 "LEN0048", /* X1 Carbon 3 */
167 "LEN0046", /* X250 */
168 "LEN0049", /* Yoga 11e */
169 "LEN004a", /* W541 */
170 "LEN005b", /* P50 */
171 "LEN005e", /* T560 */
172 "LEN006c", /* T470s */
173 "LEN007a", /* T470s */
174 "LEN0071", /* T480 */
175 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
176 "LEN0073", /* X1 Carbon G5 (Elantech) */
177 "LEN0091", /* X1 Carbon 6 */
178 "LEN0092", /* X1 Carbon 6 */
179 "LEN0093", /* T480 */
180 "LEN0096", /* X280 */
181 "LEN0097", /* X280 -> ALPS trackpoint */
182 "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
183 "LEN009b", /* T580 */
184 "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
185 "LEN040f", /* P1 Gen 3 */
186 "LEN0411", /* L14 Gen 1 */
187 "LEN200f", /* T450s */
188 "LEN2044", /* L470 */
189 "LEN2054", /* E480 */
190 "LEN2055", /* E580 */
191 "LEN2068", /* T14 Gen 1 */
192 "SYN3052", /* HP EliteBook 840 G4 */
193 "SYN3221", /* HP 15-ay000 */
194 "SYN323d", /* HP Spectre X360 13-w013dx */
195 "SYN3257", /* HP Envy 13-ad105ng */
196 NULL
197};
198
199static const char * const forcepad_pnp_ids[] = {
200 "SYN300D",
201 "SYN3014",
202 NULL
203};
204
205/*
206 * Send a command to the synaptics touchpad by special commands
207 */
208static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
209{
210 int error;
211
212 error = ps2_sliced_command(&psmouse->ps2dev, cmd);
213 if (error)
214 return error;
215
216 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
217 if (error)
218 return error;
219
220 return 0;
221}
222
223static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
224{
225 int error;
226 union {
227 __be32 be_val;
228 char buf[4];
229 } resp = { 0 };
230
231 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
232 if (error)
233 return error;
234
235 *val = be32_to_cpu(resp.be_val);
236 return 0;
237}
238
239/*
240 * Identify Touchpad
241 * See also the SYN_ID_* macros
242 */
243static int synaptics_identify(struct psmouse *psmouse,
244 struct synaptics_device_info *info)
245{
246 int error;
247
248 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
249 if (error)
250 return error;
251
252 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
253}
254
255/*
256 * Read the model-id bytes from the touchpad
257 * see also SYN_MODEL_* macros
258 */
259static int synaptics_model_id(struct psmouse *psmouse,
260 struct synaptics_device_info *info)
261{
262 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
263}
264
265/*
266 * Read the firmware id from the touchpad
267 */
268static int synaptics_firmware_id(struct psmouse *psmouse,
269 struct synaptics_device_info *info)
270{
271 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
272 &info->firmware_id);
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 struct synaptics_device_info *info)
281{
282 u8 bid[3];
283 int error;
284
285 /* firmwares prior 7.5 have no board_id encoded */
286 if (SYN_ID_FULL(info->identity) < 0x705)
287 return 0;
288
289 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
290 if (error)
291 return error;
292
293 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
294
295 if (SYN_MEXT_CAP_BIT(bid[0]))
296 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
297 &info->ext_cap_10);
298
299 return 0;
300}
301
302/*
303 * Read the capability-bits from the touchpad
304 * see also the SYN_CAP_* macros
305 */
306static int synaptics_capability(struct psmouse *psmouse,
307 struct synaptics_device_info *info)
308{
309 int error;
310
311 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
312 &info->capabilities);
313 if (error)
314 return error;
315
316 info->ext_cap = info->ext_cap_0c = 0;
317
318 /*
319 * Older firmwares had submodel ID fixed to 0x47
320 */
321 if (SYN_ID_FULL(info->identity) < 0x705 &&
322 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
323 return -ENXIO;
324 }
325
326 /*
327 * Unless capExtended is set the rest of the flags should be ignored
328 */
329 if (!SYN_CAP_EXTENDED(info->capabilities))
330 info->capabilities = 0;
331
332 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
333 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
334 &info->ext_cap);
335 if (error) {
336 psmouse_warn(psmouse,
337 "device claims to have extended capabilities, but I'm not able to read them.\n");
338 } else {
339 /*
340 * if nExtBtn is greater than 8 it should be considered
341 * invalid and treated as 0
342 */
343 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
344 info->ext_cap &= ~SYN_CAP_MB_MASK;
345 }
346 }
347
348 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
349 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
350 &info->ext_cap_0c);
351 if (error)
352 psmouse_warn(psmouse,
353 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
354 }
355
356 return 0;
357}
358
359/*
360 * Read touchpad resolution and maximum reported coordinates
361 * Resolution is left zero if touchpad does not support the query
362 */
363static int synaptics_resolution(struct psmouse *psmouse,
364 struct synaptics_device_info *info)
365{
366 u8 resp[3];
367 int error;
368
369 if (SYN_ID_MAJOR(info->identity) < 4)
370 return 0;
371
372 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
373 if (!error) {
374 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
375 info->x_res = resp[0]; /* x resolution in units/mm */
376 info->y_res = resp[2]; /* y resolution in units/mm */
377 }
378 }
379
380 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
381 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
382 error = synaptics_send_cmd(psmouse,
383 SYN_QUE_EXT_MAX_COORDS, resp);
384 if (error) {
385 psmouse_warn(psmouse,
386 "device claims to have max coordinates query, but I'm not able to read it.\n");
387 } else {
388 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
389 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
390 psmouse_info(psmouse,
391 "queried max coordinates: x [..%d], y [..%d]\n",
392 info->x_max, info->y_max);
393 }
394 }
395
396 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
397 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
398 /*
399 * Firmware v8.1 does not report proper number of extended
400 * capabilities, but has been proven to report correct min
401 * coordinates.
402 */
403 SYN_ID_FULL(info->identity) == 0x801)) {
404 error = synaptics_send_cmd(psmouse,
405 SYN_QUE_EXT_MIN_COORDS, resp);
406 if (error) {
407 psmouse_warn(psmouse,
408 "device claims to have min coordinates query, but I'm not able to read it.\n");
409 } else {
410 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
411 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
412 psmouse_info(psmouse,
413 "queried min coordinates: x [%d..], y [%d..]\n",
414 info->x_min, info->y_min);
415 }
416 }
417
418 return 0;
419}
420
421static int synaptics_query_hardware(struct psmouse *psmouse,
422 struct synaptics_device_info *info)
423{
424 int error;
425
426 memset(info, 0, sizeof(*info));
427
428 error = synaptics_identify(psmouse, info);
429 if (error)
430 return error;
431
432 error = synaptics_model_id(psmouse, info);
433 if (error)
434 return error;
435
436 error = synaptics_firmware_id(psmouse, info);
437 if (error)
438 return error;
439
440 error = synaptics_query_modes(psmouse, info);
441 if (error)
442 return error;
443
444 error = synaptics_capability(psmouse, info);
445 if (error)
446 return error;
447
448 error = synaptics_resolution(psmouse, info);
449 if (error)
450 return error;
451
452 return 0;
453}
454
455#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
456
457#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
458
459static bool cr48_profile_sensor;
460
461#define ANY_BOARD_ID 0
462struct min_max_quirk {
463 const char * const *pnp_ids;
464 struct {
465 u32 min, max;
466 } board_id;
467 u32 x_min, x_max, y_min, y_max;
468};
469
470static const struct min_max_quirk min_max_pnpid_table[] = {
471 {
472 (const char * const []){"LEN0033", NULL},
473 {ANY_BOARD_ID, ANY_BOARD_ID},
474 1024, 5052, 2258, 4832
475 },
476 {
477 (const char * const []){"LEN0042", NULL},
478 {ANY_BOARD_ID, ANY_BOARD_ID},
479 1232, 5710, 1156, 4696
480 },
481 {
482 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
483 "LEN0039", "LEN2002", "LEN2004",
484 NULL},
485 {ANY_BOARD_ID, 2961},
486 1024, 5112, 2024, 4832
487 },
488 {
489 (const char * const []){"LEN2000", NULL},
490 {ANY_BOARD_ID, ANY_BOARD_ID},
491 1024, 5113, 2021, 4832
492 },
493 {
494 (const char * const []){"LEN2001", NULL},
495 {ANY_BOARD_ID, ANY_BOARD_ID},
496 1024, 5022, 2508, 4832
497 },
498 {
499 (const char * const []){"LEN2006", NULL},
500 {2691, 2691},
501 1024, 5045, 2457, 4832
502 },
503 {
504 (const char * const []){"LEN2006", NULL},
505 {ANY_BOARD_ID, ANY_BOARD_ID},
506 1264, 5675, 1171, 4688
507 },
508 { }
509};
510
511/*****************************************************************************
512 * Synaptics communications functions
513 ****************************************************************************/
514
515/*
516 * Synaptics touchpads report the y coordinate from bottom to top, which is
517 * opposite from what userspace expects.
518 * This function is used to invert y before reporting.
519 */
520static int synaptics_invert_y(int y)
521{
522 return YMAX_NOMINAL + YMIN_NOMINAL - y;
523}
524
525/*
526 * Apply quirk(s) if the hardware matches
527 */
528static void synaptics_apply_quirks(struct psmouse *psmouse,
529 struct synaptics_device_info *info)
530{
531 int i;
532
533 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
534 if (!psmouse_matches_pnp_id(psmouse,
535 min_max_pnpid_table[i].pnp_ids))
536 continue;
537
538 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
539 info->board_id < min_max_pnpid_table[i].board_id.min)
540 continue;
541
542 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
543 info->board_id > min_max_pnpid_table[i].board_id.max)
544 continue;
545
546 info->x_min = min_max_pnpid_table[i].x_min;
547 info->x_max = min_max_pnpid_table[i].x_max;
548 info->y_min = min_max_pnpid_table[i].y_min;
549 info->y_max = min_max_pnpid_table[i].y_max;
550 psmouse_info(psmouse,
551 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
552 info->x_min, info->x_max,
553 info->y_min, info->y_max);
554 break;
555 }
556}
557
558static bool synaptics_has_agm(struct synaptics_data *priv)
559{
560 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
561 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
562}
563
564static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
565{
566 static u8 param = 0xc8;
567 int error;
568
569 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
570 if (error)
571 return error;
572
573 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE);
574 if (error)
575 return error;
576
577 return 0;
578}
579
580static int synaptics_set_mode(struct psmouse *psmouse)
581{
582 struct synaptics_data *priv = psmouse->private;
583 int error;
584
585 priv->mode = 0;
586 if (priv->absolute_mode)
587 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
588 if (priv->disable_gesture)
589 priv->mode |= SYN_BIT_DISABLE_GESTURE;
590 if (psmouse->rate >= 80)
591 priv->mode |= SYN_BIT_HIGH_RATE;
592 if (SYN_CAP_EXTENDED(priv->info.capabilities))
593 priv->mode |= SYN_BIT_W_MODE;
594
595 error = synaptics_mode_cmd(psmouse, priv->mode);
596 if (error)
597 return error;
598
599 if (priv->absolute_mode && synaptics_has_agm(priv)) {
600 error = synaptics_set_advanced_gesture_mode(psmouse);
601 if (error) {
602 psmouse_err(psmouse,
603 "Advanced gesture mode init failed: %d\n",
604 error);
605 return error;
606 }
607 }
608
609 return 0;
610}
611
612static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
613{
614 struct synaptics_data *priv = psmouse->private;
615
616 if (rate >= 80) {
617 priv->mode |= SYN_BIT_HIGH_RATE;
618 psmouse->rate = 80;
619 } else {
620 priv->mode &= ~SYN_BIT_HIGH_RATE;
621 psmouse->rate = 40;
622 }
623
624 synaptics_mode_cmd(psmouse, priv->mode);
625}
626
627/*****************************************************************************
628 * Synaptics pass-through PS/2 port support
629 ****************************************************************************/
630static int synaptics_pt_write(struct serio *serio, u8 c)
631{
632 struct psmouse *parent = psmouse_from_serio(serio->parent);
633 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
634 int error;
635
636 error = ps2_sliced_command(&parent->ps2dev, c);
637 if (error)
638 return error;
639
640 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
641 if (error)
642 return error;
643
644 return 0;
645}
646
647static int synaptics_pt_start(struct serio *serio)
648{
649 struct psmouse *parent = psmouse_from_serio(serio->parent);
650 struct synaptics_data *priv = parent->private;
651
652 serio_pause_rx(parent->ps2dev.serio);
653 priv->pt_port = serio;
654 serio_continue_rx(parent->ps2dev.serio);
655
656 return 0;
657}
658
659static void synaptics_pt_stop(struct serio *serio)
660{
661 struct psmouse *parent = psmouse_from_serio(serio->parent);
662 struct synaptics_data *priv = parent->private;
663
664 serio_pause_rx(parent->ps2dev.serio);
665 priv->pt_port = NULL;
666 serio_continue_rx(parent->ps2dev.serio);
667}
668
669static int synaptics_is_pt_packet(u8 *buf)
670{
671 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
672}
673
674static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
675{
676 struct psmouse *child = psmouse_from_serio(ptport);
677
678 if (child && child->state == PSMOUSE_ACTIVATED) {
679 serio_interrupt(ptport, packet[1], 0);
680 serio_interrupt(ptport, packet[4], 0);
681 serio_interrupt(ptport, packet[5], 0);
682 if (child->pktsize == 4)
683 serio_interrupt(ptport, packet[2], 0);
684 } else {
685 serio_interrupt(ptport, packet[1], 0);
686 }
687}
688
689static void synaptics_pt_activate(struct psmouse *psmouse)
690{
691 struct synaptics_data *priv = psmouse->private;
692 struct psmouse *child = psmouse_from_serio(priv->pt_port);
693
694 /* adjust the touchpad to child's choice of protocol */
695 if (child) {
696 if (child->pktsize == 4)
697 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
698 else
699 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
700
701 if (synaptics_mode_cmd(psmouse, priv->mode))
702 psmouse_warn(psmouse,
703 "failed to switch guest protocol\n");
704 }
705}
706
707static void synaptics_pt_create(struct psmouse *psmouse)
708{
709 struct serio *serio;
710
711 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
712 if (!serio) {
713 psmouse_err(psmouse,
714 "not enough memory for pass-through port\n");
715 return;
716 }
717
718 serio->id.type = SERIO_PS_PSTHRU;
719 strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
720 strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
721 serio->write = synaptics_pt_write;
722 serio->start = synaptics_pt_start;
723 serio->stop = synaptics_pt_stop;
724 serio->parent = psmouse->ps2dev.serio;
725
726 psmouse->pt_activate = synaptics_pt_activate;
727
728 psmouse_info(psmouse, "serio: %s port at %s\n",
729 serio->name, psmouse->phys);
730 serio_register_port(serio);
731}
732
733/*****************************************************************************
734 * Functions to interpret the absolute mode packets
735 ****************************************************************************/
736
737static void synaptics_parse_agm(const u8 buf[],
738 struct synaptics_data *priv,
739 struct synaptics_hw_state *hw)
740{
741 struct synaptics_hw_state *agm = &priv->agm;
742 int agm_packet_type;
743
744 agm_packet_type = (buf[5] & 0x30) >> 4;
745 switch (agm_packet_type) {
746 case 1:
747 /* Gesture packet: (x, y, z) half resolution */
748 agm->w = hw->w;
749 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
750 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
751 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
752 break;
753
754 case 2:
755 /* AGM-CONTACT packet: we are only interested in the count */
756 priv->agm_count = buf[1];
757 break;
758
759 default:
760 break;
761 }
762}
763
764static void synaptics_parse_ext_buttons(const u8 buf[],
765 struct synaptics_data *priv,
766 struct synaptics_hw_state *hw)
767{
768 unsigned int ext_bits =
769 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
770 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
771
772 hw->ext_buttons = buf[4] & ext_mask;
773 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
774}
775
776static int synaptics_parse_hw_state(const u8 buf[],
777 struct synaptics_data *priv,
778 struct synaptics_hw_state *hw)
779{
780 memset(hw, 0, sizeof(struct synaptics_hw_state));
781
782 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
783 hw->w = (((buf[0] & 0x30) >> 2) |
784 ((buf[0] & 0x04) >> 1) |
785 ((buf[3] & 0x04) >> 2));
786
787 if (synaptics_has_agm(priv) && hw->w == 2) {
788 synaptics_parse_agm(buf, priv, hw);
789 return 1;
790 }
791
792 hw->x = (((buf[3] & 0x10) << 8) |
793 ((buf[1] & 0x0f) << 8) |
794 buf[4]);
795 hw->y = (((buf[3] & 0x20) << 7) |
796 ((buf[1] & 0xf0) << 4) |
797 buf[5]);
798 hw->z = buf[2];
799
800 hw->left = (buf[0] & 0x01) ? 1 : 0;
801 hw->right = (buf[0] & 0x02) ? 1 : 0;
802
803 if (priv->is_forcepad) {
804 /*
805 * ForcePads, like Clickpads, use middle button
806 * bits to report primary button clicks.
807 * Unfortunately they report primary button not
808 * only when user presses on the pad above certain
809 * threshold, but also when there are more than one
810 * finger on the touchpad, which interferes with
811 * out multi-finger gestures.
812 */
813 if (hw->z == 0) {
814 /* No contacts */
815 priv->press = priv->report_press = false;
816 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
817 /*
818 * Single-finger touch with pressure above
819 * the threshold. If pressure stays long
820 * enough, we'll start reporting primary
821 * button. We rely on the device continuing
822 * sending data even if finger does not
823 * move.
824 */
825 if (!priv->press) {
826 priv->press_start = jiffies;
827 priv->press = true;
828 } else if (time_after(jiffies,
829 priv->press_start +
830 msecs_to_jiffies(50))) {
831 priv->report_press = true;
832 }
833 } else {
834 priv->press = false;
835 }
836
837 hw->left = priv->report_press;
838
839 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
840 /*
841 * Clickpad's button is transmitted as middle button,
842 * however, since it is primary button, we will report
843 * it as BTN_LEFT.
844 */
845 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
846
847 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
848 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
849 if (hw->w == 2)
850 hw->scroll = (s8)buf[1];
851 }
852
853 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
854 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
855 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
856 }
857
858 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
859 ((buf[0] ^ buf[3]) & 0x02)) {
860 synaptics_parse_ext_buttons(buf, priv, hw);
861 }
862 } else {
863 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
864 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
865
866 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
867 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
868
869 hw->left = (buf[0] & 0x01) ? 1 : 0;
870 hw->right = (buf[0] & 0x02) ? 1 : 0;
871 }
872
873 /*
874 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
875 * is used by some firmware to indicate a finger at the edge of
876 * the touchpad whose precise position cannot be determined, so
877 * convert these values to the maximum axis value.
878 */
879 if (hw->x > X_MAX_POSITIVE)
880 hw->x -= 1 << ABS_POS_BITS;
881 else if (hw->x == X_MAX_POSITIVE)
882 hw->x = XMAX;
883
884 if (hw->y > Y_MAX_POSITIVE)
885 hw->y -= 1 << ABS_POS_BITS;
886 else if (hw->y == Y_MAX_POSITIVE)
887 hw->y = YMAX;
888
889 return 0;
890}
891
892static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
893 bool active, int x, int y)
894{
895 input_mt_slot(dev, slot);
896 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
897 if (active) {
898 input_report_abs(dev, ABS_MT_POSITION_X, x);
899 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
900 }
901}
902
903static void synaptics_report_semi_mt_data(struct input_dev *dev,
904 const struct synaptics_hw_state *a,
905 const struct synaptics_hw_state *b,
906 int num_fingers)
907{
908 if (num_fingers >= 2) {
909 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
910 min(a->y, b->y));
911 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
912 max(a->y, b->y));
913 } else if (num_fingers == 1) {
914 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
915 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
916 } else {
917 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
918 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
919 }
920}
921
922static void synaptics_report_ext_buttons(struct psmouse *psmouse,
923 const struct synaptics_hw_state *hw)
924{
925 struct input_dev *dev = psmouse->dev;
926 struct synaptics_data *priv = psmouse->private;
927 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
928 int i;
929
930 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
931 return;
932
933 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
934 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
935 SYN_ID_FULL(priv->info.identity) == 0x802) &&
936 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
937 return;
938
939 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
940 for (i = 0; i < ext_bits; i++) {
941 input_report_key(dev, BTN_0 + 2 * i,
942 hw->ext_buttons & BIT(i));
943 input_report_key(dev, BTN_1 + 2 * i,
944 hw->ext_buttons & BIT(i + ext_bits));
945 }
946 return;
947 }
948
949 /*
950 * This generation of touchpads has the trackstick buttons
951 * physically wired to the touchpad. Re-route them through
952 * the pass-through interface.
953 */
954 if (priv->pt_port) {
955 u8 pt_buttons;
956
957 /* The trackstick expects at most 3 buttons */
958 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
959 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
960 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
961
962 serio_interrupt(priv->pt_port,
963 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
964 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
965 }
966}
967
968static void synaptics_report_buttons(struct psmouse *psmouse,
969 const struct synaptics_hw_state *hw)
970{
971 struct input_dev *dev = psmouse->dev;
972 struct synaptics_data *priv = psmouse->private;
973
974 input_report_key(dev, BTN_LEFT, hw->left);
975 input_report_key(dev, BTN_RIGHT, hw->right);
976
977 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
978 input_report_key(dev, BTN_MIDDLE, hw->middle);
979
980 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
981 input_report_key(dev, BTN_FORWARD, hw->up);
982 input_report_key(dev, BTN_BACK, hw->down);
983 }
984
985 synaptics_report_ext_buttons(psmouse, hw);
986}
987
988static void synaptics_report_mt_data(struct psmouse *psmouse,
989 const struct synaptics_hw_state *sgm,
990 int num_fingers)
991{
992 struct input_dev *dev = psmouse->dev;
993 struct synaptics_data *priv = psmouse->private;
994 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
995 struct input_mt_pos pos[2];
996 int slot[2], nsemi, i;
997
998 nsemi = clamp_val(num_fingers, 0, 2);
999
1000 for (i = 0; i < nsemi; i++) {
1001 pos[i].x = hw[i]->x;
1002 pos[i].y = synaptics_invert_y(hw[i]->y);
1003 }
1004
1005 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1006
1007 for (i = 0; i < nsemi; i++) {
1008 input_mt_slot(dev, slot[i]);
1009 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1010 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1011 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1012 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1013 }
1014
1015 input_mt_drop_unused(dev);
1016
1017 /* Don't use active slot count to generate BTN_TOOL events. */
1018 input_mt_report_pointer_emulation(dev, false);
1019
1020 /* Send the number of fingers reported by touchpad itself. */
1021 input_mt_report_finger_count(dev, num_fingers);
1022
1023 synaptics_report_buttons(psmouse, sgm);
1024
1025 input_sync(dev);
1026}
1027
1028static void synaptics_image_sensor_process(struct psmouse *psmouse,
1029 struct synaptics_hw_state *sgm)
1030{
1031 struct synaptics_data *priv = psmouse->private;
1032 int num_fingers;
1033
1034 /*
1035 * Update mt_state using the new finger count and current mt_state.
1036 */
1037 if (sgm->z == 0)
1038 num_fingers = 0;
1039 else if (sgm->w >= 4)
1040 num_fingers = 1;
1041 else if (sgm->w == 0)
1042 num_fingers = 2;
1043 else if (sgm->w == 1)
1044 num_fingers = priv->agm_count ? priv->agm_count : 3;
1045 else
1046 num_fingers = 4;
1047
1048 /* Send resulting input events to user space */
1049 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1050}
1051
1052static bool synaptics_has_multifinger(struct synaptics_data *priv)
1053{
1054 if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1055 return true;
1056
1057 /* Advanced gesture mode also sends multi finger data */
1058 return synaptics_has_agm(priv);
1059}
1060
1061/*
1062 * called for each full received packet from the touchpad
1063 */
1064static void synaptics_process_packet(struct psmouse *psmouse)
1065{
1066 struct input_dev *dev = psmouse->dev;
1067 struct synaptics_data *priv = psmouse->private;
1068 struct synaptics_device_info *info = &priv->info;
1069 struct synaptics_hw_state hw;
1070 int num_fingers;
1071 int finger_width;
1072
1073 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1074 return;
1075
1076 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1077 synaptics_image_sensor_process(psmouse, &hw);
1078 return;
1079 }
1080
1081 if (hw.scroll) {
1082 priv->scroll += hw.scroll;
1083
1084 while (priv->scroll >= 4) {
1085 input_report_key(dev, BTN_BACK, !hw.down);
1086 input_sync(dev);
1087 input_report_key(dev, BTN_BACK, hw.down);
1088 input_sync(dev);
1089 priv->scroll -= 4;
1090 }
1091 while (priv->scroll <= -4) {
1092 input_report_key(dev, BTN_FORWARD, !hw.up);
1093 input_sync(dev);
1094 input_report_key(dev, BTN_FORWARD, hw.up);
1095 input_sync(dev);
1096 priv->scroll += 4;
1097 }
1098 return;
1099 }
1100
1101 if (hw.z > 0 && hw.x > 1) {
1102 num_fingers = 1;
1103 finger_width = 5;
1104 if (SYN_CAP_EXTENDED(info->capabilities)) {
1105 switch (hw.w) {
1106 case 0 ... 1:
1107 if (synaptics_has_multifinger(priv))
1108 num_fingers = hw.w + 2;
1109 break;
1110 case 2:
1111 /*
1112 * SYN_MODEL_PEN(info->model_id): even if
1113 * the device supports pen, we treat it as
1114 * a single finger.
1115 */
1116 break;
1117 case 4 ... 15:
1118 if (SYN_CAP_PALMDETECT(info->capabilities))
1119 finger_width = hw.w;
1120 break;
1121 }
1122 }
1123 } else {
1124 num_fingers = 0;
1125 finger_width = 0;
1126 }
1127
1128 if (cr48_profile_sensor) {
1129 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1130 return;
1131 }
1132
1133 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1134 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1135 num_fingers);
1136
1137 /* Post events
1138 * BTN_TOUCH has to be first as mousedev relies on it when doing
1139 * absolute -> relative conversion
1140 */
1141 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1142 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1143
1144 if (num_fingers > 0) {
1145 input_report_abs(dev, ABS_X, hw.x);
1146 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1147 }
1148 input_report_abs(dev, ABS_PRESSURE, hw.z);
1149
1150 if (SYN_CAP_PALMDETECT(info->capabilities))
1151 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1152
1153 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1154 if (synaptics_has_multifinger(priv)) {
1155 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1156 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1157 }
1158
1159 synaptics_report_buttons(psmouse, &hw);
1160
1161 input_sync(dev);
1162}
1163
1164static bool synaptics_validate_byte(struct psmouse *psmouse,
1165 int idx, enum synaptics_pkt_type pkt_type)
1166{
1167 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1168 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1169 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1170 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1171 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1172 const u8 *packet = psmouse->packet;
1173
1174 if (idx < 0 || idx > 4)
1175 return false;
1176
1177 switch (pkt_type) {
1178
1179 case SYN_NEWABS:
1180 case SYN_NEWABS_RELAXED:
1181 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1182
1183 case SYN_NEWABS_STRICT:
1184 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1185
1186 case SYN_OLDABS:
1187 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1188
1189 default:
1190 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1191 return false;
1192 }
1193}
1194
1195static enum synaptics_pkt_type
1196synaptics_detect_pkt_type(struct psmouse *psmouse)
1197{
1198 int i;
1199
1200 for (i = 0; i < 5; i++) {
1201 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1202 psmouse_info(psmouse, "using relaxed packet validation\n");
1203 return SYN_NEWABS_RELAXED;
1204 }
1205 }
1206
1207 return SYN_NEWABS_STRICT;
1208}
1209
1210static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1211{
1212 struct synaptics_data *priv = psmouse->private;
1213
1214 if (psmouse->pktcnt >= 6) { /* Full packet received */
1215 if (unlikely(priv->pkt_type == SYN_NEWABS))
1216 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1217
1218 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1219 synaptics_is_pt_packet(psmouse->packet)) {
1220 if (priv->pt_port)
1221 synaptics_pass_pt_packet(priv->pt_port,
1222 psmouse->packet);
1223 } else
1224 synaptics_process_packet(psmouse);
1225
1226 return PSMOUSE_FULL_PACKET;
1227 }
1228
1229 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1230 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1231}
1232
1233/*****************************************************************************
1234 * Driver initialization/cleanup functions
1235 ****************************************************************************/
1236static void set_abs_position_params(struct input_dev *dev,
1237 struct synaptics_device_info *info,
1238 int x_code, int y_code)
1239{
1240 int x_min = info->x_min ?: XMIN_NOMINAL;
1241 int x_max = info->x_max ?: XMAX_NOMINAL;
1242 int y_min = info->y_min ?: YMIN_NOMINAL;
1243 int y_max = info->y_max ?: YMAX_NOMINAL;
1244 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1245 SYN_REDUCED_FILTER_FUZZ : 0;
1246
1247 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1248 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1249 input_abs_set_res(dev, x_code, info->x_res);
1250 input_abs_set_res(dev, y_code, info->y_res);
1251}
1252
1253static int set_input_params(struct psmouse *psmouse,
1254 struct synaptics_data *priv)
1255{
1256 struct input_dev *dev = psmouse->dev;
1257 struct synaptics_device_info *info = &priv->info;
1258 int i;
1259 int error;
1260
1261 /* Reset default psmouse capabilities */
1262 __clear_bit(EV_REL, dev->evbit);
1263 bitmap_zero(dev->relbit, REL_CNT);
1264 bitmap_zero(dev->keybit, KEY_CNT);
1265
1266 /* Things that apply to both modes */
1267 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1268
1269 input_set_capability(dev, EV_KEY, BTN_LEFT);
1270
1271 /* Clickpads report only left button */
1272 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1273 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1274 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1275 input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1276 }
1277
1278 if (!priv->absolute_mode) {
1279 /* Relative mode */
1280 input_set_capability(dev, EV_REL, REL_X);
1281 input_set_capability(dev, EV_REL, REL_Y);
1282 return 0;
1283 }
1284
1285 /* Absolute mode */
1286 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1287 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1288
1289 if (cr48_profile_sensor)
1290 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1291
1292 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1293 set_abs_position_params(dev, info,
1294 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1295 /* Image sensors can report per-contact pressure */
1296 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1297
1298 error = input_mt_init_slots(dev, 2,
1299 INPUT_MT_POINTER | INPUT_MT_TRACK);
1300 if (error)
1301 return error;
1302
1303 /* Image sensors can signal 4 and 5 finger clicks */
1304 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1305 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1306 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1307 set_abs_position_params(dev, info,
1308 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1309 /*
1310 * Profile sensor in CR-48 tracks contacts reasonably well,
1311 * other non-image sensors with AGM use semi-mt.
1312 */
1313 error = input_mt_init_slots(dev, 2,
1314 INPUT_MT_POINTER |
1315 (cr48_profile_sensor ?
1316 INPUT_MT_TRACK :
1317 INPUT_MT_SEMI_MT));
1318 if (error)
1319 return error;
1320
1321 /*
1322 * For semi-mt devices we send ABS_X/Y ourselves instead of
1323 * input_mt_report_pointer_emulation. But
1324 * input_mt_init_slots() resets the fuzz to 0, leading to a
1325 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1326 * position. Let's re-initialize ABS_X/Y here.
1327 */
1328 if (!cr48_profile_sensor)
1329 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1330 }
1331
1332 if (SYN_CAP_PALMDETECT(info->capabilities))
1333 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1334
1335 input_set_capability(dev, EV_KEY, BTN_TOUCH);
1336 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1337
1338 if (synaptics_has_multifinger(priv)) {
1339 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1340 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1341 }
1342
1343 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1344 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1345 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1346 input_set_capability(dev, EV_KEY, BTN_BACK);
1347 }
1348
1349 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1350 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1351 input_set_capability(dev, EV_KEY, BTN_0 + i);
1352
1353 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1354 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1355 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1356 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1357 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1358 }
1359
1360 return 0;
1361}
1362
1363static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1364 void *data, char *buf)
1365{
1366 struct synaptics_data *priv = psmouse->private;
1367
1368 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1369}
1370
1371static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1372 void *data, const char *buf,
1373 size_t len)
1374{
1375 struct synaptics_data *priv = psmouse->private;
1376 unsigned int value;
1377 int err;
1378
1379 err = kstrtouint(buf, 10, &value);
1380 if (err)
1381 return err;
1382
1383 if (value > 1)
1384 return -EINVAL;
1385
1386 if (value == priv->disable_gesture)
1387 return len;
1388
1389 priv->disable_gesture = value;
1390 if (value)
1391 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1392 else
1393 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1394
1395 if (synaptics_mode_cmd(psmouse, priv->mode))
1396 return -EIO;
1397
1398 return len;
1399}
1400
1401PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1402 synaptics_show_disable_gesture,
1403 synaptics_set_disable_gesture);
1404
1405static void synaptics_disconnect(struct psmouse *psmouse)
1406{
1407 struct synaptics_data *priv = psmouse->private;
1408
1409 /*
1410 * We might have left a breadcrumb when trying to
1411 * set up SMbus companion.
1412 */
1413 psmouse_smbus_cleanup(psmouse);
1414
1415 if (!priv->absolute_mode &&
1416 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1417 device_remove_file(&psmouse->ps2dev.serio->dev,
1418 &psmouse_attr_disable_gesture.dattr);
1419
1420 synaptics_reset(psmouse);
1421 kfree(priv);
1422 psmouse->private = NULL;
1423}
1424
1425static int synaptics_reconnect(struct psmouse *psmouse)
1426{
1427 struct synaptics_data *priv = psmouse->private;
1428 struct synaptics_device_info info;
1429 u8 param[2];
1430 int retry = 0;
1431 int error;
1432
1433 do {
1434 psmouse_reset(psmouse);
1435 if (retry) {
1436 /*
1437 * On some boxes, right after resuming, the touchpad
1438 * needs some time to finish initializing (I assume
1439 * it needs time to calibrate) and start responding
1440 * to Synaptics-specific queries, so let's wait a
1441 * bit.
1442 */
1443 ssleep(1);
1444 }
1445 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1446 error = synaptics_detect(psmouse, 0);
1447 } while (error && ++retry < 3);
1448
1449 if (error)
1450 return error;
1451
1452 if (retry > 1)
1453 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1454
1455 error = synaptics_query_hardware(psmouse, &info);
1456 if (error) {
1457 psmouse_err(psmouse, "Unable to query device.\n");
1458 return error;
1459 }
1460
1461 error = synaptics_set_mode(psmouse);
1462 if (error) {
1463 psmouse_err(psmouse, "Unable to initialize device.\n");
1464 return error;
1465 }
1466
1467 if (info.identity != priv->info.identity ||
1468 info.model_id != priv->info.model_id ||
1469 info.capabilities != priv->info.capabilities ||
1470 info.ext_cap != priv->info.ext_cap) {
1471 psmouse_err(psmouse,
1472 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1473 priv->info.identity, info.identity,
1474 priv->info.model_id, info.model_id,
1475 priv->info.capabilities, info.capabilities,
1476 priv->info.ext_cap, info.ext_cap);
1477 return -ENXIO;
1478 }
1479
1480 return 0;
1481}
1482
1483static bool impaired_toshiba_kbc;
1484
1485static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1486#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1487 {
1488 /* Toshiba Satellite */
1489 .matches = {
1490 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1491 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1492 },
1493 },
1494 {
1495 /* Toshiba Dynabook */
1496 .matches = {
1497 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1498 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1499 },
1500 },
1501 {
1502 /* Toshiba Portege M300 */
1503 .matches = {
1504 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1505 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1506 },
1507
1508 },
1509 {
1510 /* Toshiba Portege M300 */
1511 .matches = {
1512 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1513 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1514 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1515 },
1516
1517 },
1518#endif
1519 { }
1520};
1521
1522static bool broken_olpc_ec;
1523
1524static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1525#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1526 {
1527 /* OLPC XO-1 or XO-1.5 */
1528 .matches = {
1529 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1530 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1531 },
1532 },
1533#endif
1534 { }
1535};
1536
1537static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1538#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1539 {
1540 /* Cr-48 Chromebook (Codename Mario) */
1541 .matches = {
1542 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1543 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1544 },
1545 },
1546#endif
1547 { }
1548};
1549
1550void __init synaptics_module_init(void)
1551{
1552 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1553 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1554 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1555}
1556
1557static int synaptics_init_ps2(struct psmouse *psmouse,
1558 struct synaptics_device_info *info,
1559 bool absolute_mode)
1560{
1561 struct synaptics_data *priv;
1562 int err;
1563
1564 synaptics_apply_quirks(psmouse, info);
1565
1566 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1567 if (!priv)
1568 return -ENOMEM;
1569
1570 priv->info = *info;
1571 priv->absolute_mode = absolute_mode;
1572 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1573 priv->disable_gesture = true;
1574
1575 /*
1576 * Unfortunately ForcePad capability is not exported over PS/2,
1577 * so we have to resort to checking PNP IDs.
1578 */
1579 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1580
1581 err = synaptics_set_mode(psmouse);
1582 if (err) {
1583 psmouse_err(psmouse, "Unable to initialize device.\n");
1584 goto init_fail;
1585 }
1586
1587 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1588 SYN_NEWABS : SYN_OLDABS;
1589
1590 psmouse_info(psmouse,
1591 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1592 SYN_ID_MODEL(info->identity),
1593 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1594 info->model_id,
1595 info->capabilities, info->ext_cap, info->ext_cap_0c,
1596 info->ext_cap_10, info->board_id, info->firmware_id);
1597
1598 err = set_input_params(psmouse, priv);
1599 if (err) {
1600 psmouse_err(psmouse,
1601 "failed to set up capabilities: %d\n", err);
1602 goto init_fail;
1603 }
1604
1605 /*
1606 * Encode touchpad model so that it can be used to set
1607 * input device->id.version and be visible to userspace.
1608 * Because version is __u16 we have to drop something.
1609 * Hardware info bits seem to be good candidates as they
1610 * are documented to be for Synaptics corp. internal use.
1611 */
1612 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1613 (info->model_id & 0x000000ff);
1614
1615 if (absolute_mode) {
1616 psmouse->protocol_handler = synaptics_process_byte;
1617 psmouse->pktsize = 6;
1618 } else {
1619 /* Relative mode follows standard PS/2 mouse protocol */
1620 psmouse->protocol_handler = psmouse_process_byte;
1621 psmouse->pktsize = 3;
1622 }
1623
1624 psmouse->set_rate = synaptics_set_rate;
1625 psmouse->disconnect = synaptics_disconnect;
1626 psmouse->reconnect = synaptics_reconnect;
1627 psmouse->fast_reconnect = NULL;
1628 psmouse->cleanup = synaptics_reset;
1629 /* Synaptics can usually stay in sync without extra help */
1630 psmouse->resync_time = 0;
1631
1632 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1633 synaptics_pt_create(psmouse);
1634
1635 /*
1636 * Toshiba's KBC seems to have trouble handling data from
1637 * Synaptics at full rate. Switch to a lower rate (roughly
1638 * the same rate as a standard PS/2 mouse).
1639 */
1640 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1641 psmouse_info(psmouse,
1642 "Toshiba %s detected, limiting rate to 40pps.\n",
1643 dmi_get_system_info(DMI_PRODUCT_NAME));
1644 psmouse->rate = 40;
1645 }
1646
1647 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1648 err = device_create_file(&psmouse->ps2dev.serio->dev,
1649 &psmouse_attr_disable_gesture.dattr);
1650 if (err) {
1651 psmouse_err(psmouse,
1652 "Failed to create disable_gesture attribute (%d)",
1653 err);
1654 goto init_fail;
1655 }
1656 }
1657
1658 return 0;
1659
1660 init_fail:
1661 kfree(priv);
1662 return err;
1663}
1664
1665static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1666{
1667 struct synaptics_device_info info;
1668 int error;
1669
1670 psmouse_reset(psmouse);
1671
1672 error = synaptics_query_hardware(psmouse, &info);
1673 if (error) {
1674 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1675 return error;
1676 }
1677
1678 return synaptics_init_ps2(psmouse, &info, absolute_mode);
1679}
1680
1681int synaptics_init_absolute(struct psmouse *psmouse)
1682{
1683 return __synaptics_init(psmouse, true);
1684}
1685
1686int synaptics_init_relative(struct psmouse *psmouse)
1687{
1688 return __synaptics_init(psmouse, false);
1689}
1690
1691static int synaptics_setup_ps2(struct psmouse *psmouse,
1692 struct synaptics_device_info *info)
1693{
1694 bool absolute_mode = true;
1695 int error;
1696
1697 /*
1698 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1699 * packet spew overloads the EC such that key presses on the keyboard
1700 * are missed. Given that, don't even attempt to use Absolute mode.
1701 * Relative mode seems to work just fine.
1702 */
1703 if (broken_olpc_ec) {
1704 psmouse_info(psmouse,
1705 "OLPC XO detected, forcing relative protocol.\n");
1706 absolute_mode = false;
1707 }
1708
1709 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1710 if (error)
1711 return error;
1712
1713 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1714}
1715
1716#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1717
1718void __init synaptics_module_init(void)
1719{
1720}
1721
1722static int __maybe_unused
1723synaptics_setup_ps2(struct psmouse *psmouse,
1724 struct synaptics_device_info *info)
1725{
1726 return -ENOSYS;
1727}
1728
1729#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1730
1731#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1732
1733/*
1734 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1735 * provides a better bandwidth and allow a better control of the touchpads.
1736 * This is used to decide if we need to use this bus or not.
1737 */
1738enum {
1739 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1740 SYNAPTICS_INTERTOUCH_OFF,
1741 SYNAPTICS_INTERTOUCH_ON,
1742};
1743
1744static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1745 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1746module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1747MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1748
1749static int synaptics_create_intertouch(struct psmouse *psmouse,
1750 struct synaptics_device_info *info,
1751 bool leave_breadcrumbs)
1752{
1753 bool topbuttonpad =
1754 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1755 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1756 const struct rmi_device_platform_data pdata = {
1757 .reset_delay_ms = 30,
1758 .sensor_pdata = {
1759 .sensor_type = rmi_sensor_touchpad,
1760 .axis_align.flip_y = true,
1761 .kernel_tracking = false,
1762 .topbuttonpad = topbuttonpad,
1763 },
1764 .gpio_data = {
1765 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1766 .trackstick_buttons =
1767 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1768 },
1769 };
1770 const struct i2c_board_info intertouch_board = {
1771 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1772 .flags = I2C_CLIENT_HOST_NOTIFY,
1773 };
1774
1775 return psmouse_smbus_init(psmouse, &intertouch_board,
1776 &pdata, sizeof(pdata), true,
1777 leave_breadcrumbs);
1778}
1779
1780/*
1781 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1782 * and decides to instantiate a SMBus InterTouch device.
1783 */
1784static int synaptics_setup_intertouch(struct psmouse *psmouse,
1785 struct synaptics_device_info *info,
1786 bool leave_breadcrumbs)
1787{
1788 int error;
1789
1790 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1791 return -ENXIO;
1792
1793 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1794 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1795 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1796
1797 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1798 psmouse_info(psmouse,
1799 "Your touchpad (%s) says it can support a different bus. "
1800 "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",
1801 psmouse->ps2dev.serio->firmware_id);
1802
1803 return -ENXIO;
1804 }
1805 }
1806
1807 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1808
1809 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1810 if (error) {
1811 if (error == -EAGAIN)
1812 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1813 else
1814 psmouse_err(psmouse, "unable to create intertouch device\n");
1815
1816 return error;
1817 }
1818
1819 return 0;
1820}
1821
1822int synaptics_init_smbus(struct psmouse *psmouse)
1823{
1824 struct synaptics_device_info info;
1825 int error;
1826
1827 psmouse_reset(psmouse);
1828
1829 error = synaptics_query_hardware(psmouse, &info);
1830 if (error) {
1831 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1832 return error;
1833 }
1834
1835 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1836 return -ENXIO;
1837
1838 return synaptics_create_intertouch(psmouse, &info, false);
1839}
1840
1841#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1842
1843static int __maybe_unused
1844synaptics_setup_intertouch(struct psmouse *psmouse,
1845 struct synaptics_device_info *info,
1846 bool leave_breadcrumbs)
1847{
1848 return -ENOSYS;
1849}
1850
1851int synaptics_init_smbus(struct psmouse *psmouse)
1852{
1853 return -ENOSYS;
1854}
1855
1856#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1857
1858#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1859 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1860
1861int synaptics_init(struct psmouse *psmouse)
1862{
1863 struct synaptics_device_info info;
1864 int error;
1865 int retval;
1866
1867 psmouse_reset(psmouse);
1868
1869 error = synaptics_query_hardware(psmouse, &info);
1870 if (error) {
1871 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1872 return error;
1873 }
1874
1875 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1876 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1877 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1878 /* Forcepads need F21, which is not ready */
1879 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1880 psmouse_warn(psmouse,
1881 "The touchpad can support a better bus than the too old PS/2 protocol. "
1882 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1883 }
1884
1885 error = synaptics_setup_intertouch(psmouse, &info, true);
1886 if (!error)
1887 return PSMOUSE_SYNAPTICS_SMBUS;
1888 }
1889
1890 retval = synaptics_setup_ps2(psmouse, &info);
1891 if (retval < 0) {
1892 /*
1893 * Not using any flavor of Synaptics support, so clean up
1894 * SMbus breadcrumbs, if any.
1895 */
1896 psmouse_smbus_cleanup(psmouse);
1897 }
1898
1899 return retval;
1900}
1901
1902#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1903
1904int synaptics_init(struct psmouse *psmouse)
1905{
1906 return -ENOSYS;
1907}
1908
1909#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
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 */