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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 "LEN200f", /* T450s */
187 "LEN2044", /* L470 */
188 "LEN2054", /* E480 */
189 "LEN2055", /* E580 */
190 "LEN2068", /* T14 Gen 1 */
191 "SYN3052", /* HP EliteBook 840 G4 */
192 "SYN3221", /* HP 15-ay000 */
193 "SYN323d", /* HP Spectre X360 13-w013dx */
194 "SYN3257", /* HP Envy 13-ad105ng */
195 NULL
196};
197
198static const char * const forcepad_pnp_ids[] = {
199 "SYN300D",
200 "SYN3014",
201 NULL
202};
203
204/*
205 * Send a command to the synaptics touchpad by special commands
206 */
207static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
208{
209 int error;
210
211 error = ps2_sliced_command(&psmouse->ps2dev, cmd);
212 if (error)
213 return error;
214
215 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
216 if (error)
217 return error;
218
219 return 0;
220}
221
222static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
223{
224 int error;
225 union {
226 __be32 be_val;
227 char buf[4];
228 } resp = { 0 };
229
230 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
231 if (error)
232 return error;
233
234 *val = be32_to_cpu(resp.be_val);
235 return 0;
236}
237
238/*
239 * Identify Touchpad
240 * See also the SYN_ID_* macros
241 */
242static int synaptics_identify(struct psmouse *psmouse,
243 struct synaptics_device_info *info)
244{
245 int error;
246
247 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
248 if (error)
249 return error;
250
251 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
252}
253
254/*
255 * Read the model-id bytes from the touchpad
256 * see also SYN_MODEL_* macros
257 */
258static int synaptics_model_id(struct psmouse *psmouse,
259 struct synaptics_device_info *info)
260{
261 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
262}
263
264/*
265 * Read the firmware id from the touchpad
266 */
267static int synaptics_firmware_id(struct psmouse *psmouse,
268 struct synaptics_device_info *info)
269{
270 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
271 &info->firmware_id);
272}
273
274/*
275 * Read the board id and the "More Extended Queries" from the touchpad
276 * The board id is encoded in the "QUERY MODES" response
277 */
278static int synaptics_query_modes(struct psmouse *psmouse,
279 struct synaptics_device_info *info)
280{
281 u8 bid[3];
282 int error;
283
284 /* firmwares prior 7.5 have no board_id encoded */
285 if (SYN_ID_FULL(info->identity) < 0x705)
286 return 0;
287
288 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
289 if (error)
290 return error;
291
292 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
293
294 if (SYN_MEXT_CAP_BIT(bid[0]))
295 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
296 &info->ext_cap_10);
297
298 return 0;
299}
300
301/*
302 * Read the capability-bits from the touchpad
303 * see also the SYN_CAP_* macros
304 */
305static int synaptics_capability(struct psmouse *psmouse,
306 struct synaptics_device_info *info)
307{
308 int error;
309
310 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
311 &info->capabilities);
312 if (error)
313 return error;
314
315 info->ext_cap = info->ext_cap_0c = 0;
316
317 /*
318 * Older firmwares had submodel ID fixed to 0x47
319 */
320 if (SYN_ID_FULL(info->identity) < 0x705 &&
321 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
322 return -ENXIO;
323 }
324
325 /*
326 * Unless capExtended is set the rest of the flags should be ignored
327 */
328 if (!SYN_CAP_EXTENDED(info->capabilities))
329 info->capabilities = 0;
330
331 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
332 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
333 &info->ext_cap);
334 if (error) {
335 psmouse_warn(psmouse,
336 "device claims to have extended capabilities, but I'm not able to read them.\n");
337 } else {
338 /*
339 * if nExtBtn is greater than 8 it should be considered
340 * invalid and treated as 0
341 */
342 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
343 info->ext_cap &= ~SYN_CAP_MB_MASK;
344 }
345 }
346
347 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
348 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
349 &info->ext_cap_0c);
350 if (error)
351 psmouse_warn(psmouse,
352 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
353 }
354
355 return 0;
356}
357
358/*
359 * Read touchpad resolution and maximum reported coordinates
360 * Resolution is left zero if touchpad does not support the query
361 */
362static int synaptics_resolution(struct psmouse *psmouse,
363 struct synaptics_device_info *info)
364{
365 u8 resp[3];
366 int error;
367
368 if (SYN_ID_MAJOR(info->identity) < 4)
369 return 0;
370
371 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
372 if (!error) {
373 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
374 info->x_res = resp[0]; /* x resolution in units/mm */
375 info->y_res = resp[2]; /* y resolution in units/mm */
376 }
377 }
378
379 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
380 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
381 error = synaptics_send_cmd(psmouse,
382 SYN_QUE_EXT_MAX_COORDS, resp);
383 if (error) {
384 psmouse_warn(psmouse,
385 "device claims to have max coordinates query, but I'm not able to read it.\n");
386 } else {
387 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
388 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
389 psmouse_info(psmouse,
390 "queried max coordinates: x [..%d], y [..%d]\n",
391 info->x_max, info->y_max);
392 }
393 }
394
395 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
396 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
397 /*
398 * Firmware v8.1 does not report proper number of extended
399 * capabilities, but has been proven to report correct min
400 * coordinates.
401 */
402 SYN_ID_FULL(info->identity) == 0x801)) {
403 error = synaptics_send_cmd(psmouse,
404 SYN_QUE_EXT_MIN_COORDS, resp);
405 if (error) {
406 psmouse_warn(psmouse,
407 "device claims to have min coordinates query, but I'm not able to read it.\n");
408 } else {
409 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
410 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
411 psmouse_info(psmouse,
412 "queried min coordinates: x [%d..], y [%d..]\n",
413 info->x_min, info->y_min);
414 }
415 }
416
417 return 0;
418}
419
420static int synaptics_query_hardware(struct psmouse *psmouse,
421 struct synaptics_device_info *info)
422{
423 int error;
424
425 memset(info, 0, sizeof(*info));
426
427 error = synaptics_identify(psmouse, info);
428 if (error)
429 return error;
430
431 error = synaptics_model_id(psmouse, info);
432 if (error)
433 return error;
434
435 error = synaptics_firmware_id(psmouse, info);
436 if (error)
437 return error;
438
439 error = synaptics_query_modes(psmouse, info);
440 if (error)
441 return error;
442
443 error = synaptics_capability(psmouse, info);
444 if (error)
445 return error;
446
447 error = synaptics_resolution(psmouse, info);
448 if (error)
449 return error;
450
451 return 0;
452}
453
454#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
455
456#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
457
458static bool cr48_profile_sensor;
459
460#define ANY_BOARD_ID 0
461struct min_max_quirk {
462 const char * const *pnp_ids;
463 struct {
464 u32 min, max;
465 } board_id;
466 u32 x_min, x_max, y_min, y_max;
467};
468
469static const struct min_max_quirk min_max_pnpid_table[] = {
470 {
471 (const char * const []){"LEN0033", NULL},
472 {ANY_BOARD_ID, ANY_BOARD_ID},
473 1024, 5052, 2258, 4832
474 },
475 {
476 (const char * const []){"LEN0042", NULL},
477 {ANY_BOARD_ID, ANY_BOARD_ID},
478 1232, 5710, 1156, 4696
479 },
480 {
481 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
482 "LEN0039", "LEN2002", "LEN2004",
483 NULL},
484 {ANY_BOARD_ID, 2961},
485 1024, 5112, 2024, 4832
486 },
487 {
488 (const char * const []){"LEN2000", NULL},
489 {ANY_BOARD_ID, ANY_BOARD_ID},
490 1024, 5113, 2021, 4832
491 },
492 {
493 (const char * const []){"LEN2001", NULL},
494 {ANY_BOARD_ID, ANY_BOARD_ID},
495 1024, 5022, 2508, 4832
496 },
497 {
498 (const char * const []){"LEN2006", NULL},
499 {2691, 2691},
500 1024, 5045, 2457, 4832
501 },
502 {
503 (const char * const []){"LEN2006", NULL},
504 {ANY_BOARD_ID, ANY_BOARD_ID},
505 1264, 5675, 1171, 4688
506 },
507 { }
508};
509
510/*****************************************************************************
511 * Synaptics communications functions
512 ****************************************************************************/
513
514/*
515 * Synaptics touchpads report the y coordinate from bottom to top, which is
516 * opposite from what userspace expects.
517 * This function is used to invert y before reporting.
518 */
519static int synaptics_invert_y(int y)
520{
521 return YMAX_NOMINAL + YMIN_NOMINAL - y;
522}
523
524/*
525 * Apply quirk(s) if the hardware matches
526 */
527static void synaptics_apply_quirks(struct psmouse *psmouse,
528 struct synaptics_device_info *info)
529{
530 int i;
531
532 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
533 if (!psmouse_matches_pnp_id(psmouse,
534 min_max_pnpid_table[i].pnp_ids))
535 continue;
536
537 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
538 info->board_id < min_max_pnpid_table[i].board_id.min)
539 continue;
540
541 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
542 info->board_id > min_max_pnpid_table[i].board_id.max)
543 continue;
544
545 info->x_min = min_max_pnpid_table[i].x_min;
546 info->x_max = min_max_pnpid_table[i].x_max;
547 info->y_min = min_max_pnpid_table[i].y_min;
548 info->y_max = min_max_pnpid_table[i].y_max;
549 psmouse_info(psmouse,
550 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
551 info->x_min, info->x_max,
552 info->y_min, info->y_max);
553 break;
554 }
555}
556
557static bool synaptics_has_agm(struct synaptics_data *priv)
558{
559 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
560 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
561}
562
563static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
564{
565 static u8 param = 0xc8;
566 int error;
567
568 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
569 if (error)
570 return error;
571
572 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE);
573 if (error)
574 return error;
575
576 return 0;
577}
578
579static int synaptics_set_mode(struct psmouse *psmouse)
580{
581 struct synaptics_data *priv = psmouse->private;
582 int error;
583
584 priv->mode = 0;
585 if (priv->absolute_mode)
586 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
587 if (priv->disable_gesture)
588 priv->mode |= SYN_BIT_DISABLE_GESTURE;
589 if (psmouse->rate >= 80)
590 priv->mode |= SYN_BIT_HIGH_RATE;
591 if (SYN_CAP_EXTENDED(priv->info.capabilities))
592 priv->mode |= SYN_BIT_W_MODE;
593
594 error = synaptics_mode_cmd(psmouse, priv->mode);
595 if (error)
596 return error;
597
598 if (priv->absolute_mode && synaptics_has_agm(priv)) {
599 error = synaptics_set_advanced_gesture_mode(psmouse);
600 if (error) {
601 psmouse_err(psmouse,
602 "Advanced gesture mode init failed: %d\n",
603 error);
604 return error;
605 }
606 }
607
608 return 0;
609}
610
611static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
612{
613 struct synaptics_data *priv = psmouse->private;
614
615 if (rate >= 80) {
616 priv->mode |= SYN_BIT_HIGH_RATE;
617 psmouse->rate = 80;
618 } else {
619 priv->mode &= ~SYN_BIT_HIGH_RATE;
620 psmouse->rate = 40;
621 }
622
623 synaptics_mode_cmd(psmouse, priv->mode);
624}
625
626/*****************************************************************************
627 * Synaptics pass-through PS/2 port support
628 ****************************************************************************/
629static int synaptics_pt_write(struct serio *serio, u8 c)
630{
631 struct psmouse *parent = serio_get_drvdata(serio->parent);
632 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
633 int error;
634
635 error = ps2_sliced_command(&parent->ps2dev, c);
636 if (error)
637 return error;
638
639 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
640 if (error)
641 return error;
642
643 return 0;
644}
645
646static int synaptics_pt_start(struct serio *serio)
647{
648 struct psmouse *parent = serio_get_drvdata(serio->parent);
649 struct synaptics_data *priv = parent->private;
650
651 serio_pause_rx(parent->ps2dev.serio);
652 priv->pt_port = serio;
653 serio_continue_rx(parent->ps2dev.serio);
654
655 return 0;
656}
657
658static void synaptics_pt_stop(struct serio *serio)
659{
660 struct psmouse *parent = serio_get_drvdata(serio->parent);
661 struct synaptics_data *priv = parent->private;
662
663 serio_pause_rx(parent->ps2dev.serio);
664 priv->pt_port = NULL;
665 serio_continue_rx(parent->ps2dev.serio);
666}
667
668static int synaptics_is_pt_packet(u8 *buf)
669{
670 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
671}
672
673static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
674{
675 struct psmouse *child = serio_get_drvdata(ptport);
676
677 if (child && child->state == PSMOUSE_ACTIVATED) {
678 serio_interrupt(ptport, packet[1], 0);
679 serio_interrupt(ptport, packet[4], 0);
680 serio_interrupt(ptport, packet[5], 0);
681 if (child->pktsize == 4)
682 serio_interrupt(ptport, packet[2], 0);
683 } else {
684 serio_interrupt(ptport, packet[1], 0);
685 }
686}
687
688static void synaptics_pt_activate(struct psmouse *psmouse)
689{
690 struct synaptics_data *priv = psmouse->private;
691 struct psmouse *child = serio_get_drvdata(priv->pt_port);
692
693 /* adjust the touchpad to child's choice of protocol */
694 if (child) {
695 if (child->pktsize == 4)
696 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
697 else
698 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
699
700 if (synaptics_mode_cmd(psmouse, priv->mode))
701 psmouse_warn(psmouse,
702 "failed to switch guest protocol\n");
703 }
704}
705
706static void synaptics_pt_create(struct psmouse *psmouse)
707{
708 struct serio *serio;
709
710 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
711 if (!serio) {
712 psmouse_err(psmouse,
713 "not enough memory for pass-through port\n");
714 return;
715 }
716
717 serio->id.type = SERIO_PS_PSTHRU;
718 strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
719 strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
720 serio->write = synaptics_pt_write;
721 serio->start = synaptics_pt_start;
722 serio->stop = synaptics_pt_stop;
723 serio->parent = psmouse->ps2dev.serio;
724
725 psmouse->pt_activate = synaptics_pt_activate;
726
727 psmouse_info(psmouse, "serio: %s port at %s\n",
728 serio->name, psmouse->phys);
729 serio_register_port(serio);
730}
731
732/*****************************************************************************
733 * Functions to interpret the absolute mode packets
734 ****************************************************************************/
735
736static void synaptics_parse_agm(const u8 buf[],
737 struct synaptics_data *priv,
738 struct synaptics_hw_state *hw)
739{
740 struct synaptics_hw_state *agm = &priv->agm;
741 int agm_packet_type;
742
743 agm_packet_type = (buf[5] & 0x30) >> 4;
744 switch (agm_packet_type) {
745 case 1:
746 /* Gesture packet: (x, y, z) half resolution */
747 agm->w = hw->w;
748 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
749 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
750 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
751 break;
752
753 case 2:
754 /* AGM-CONTACT packet: we are only interested in the count */
755 priv->agm_count = buf[1];
756 break;
757
758 default:
759 break;
760 }
761}
762
763static void synaptics_parse_ext_buttons(const u8 buf[],
764 struct synaptics_data *priv,
765 struct synaptics_hw_state *hw)
766{
767 unsigned int ext_bits =
768 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
769 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
770
771 hw->ext_buttons = buf[4] & ext_mask;
772 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
773}
774
775static int synaptics_parse_hw_state(const u8 buf[],
776 struct synaptics_data *priv,
777 struct synaptics_hw_state *hw)
778{
779 memset(hw, 0, sizeof(struct synaptics_hw_state));
780
781 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
782 hw->w = (((buf[0] & 0x30) >> 2) |
783 ((buf[0] & 0x04) >> 1) |
784 ((buf[3] & 0x04) >> 2));
785
786 if (synaptics_has_agm(priv) && hw->w == 2) {
787 synaptics_parse_agm(buf, priv, hw);
788 return 1;
789 }
790
791 hw->x = (((buf[3] & 0x10) << 8) |
792 ((buf[1] & 0x0f) << 8) |
793 buf[4]);
794 hw->y = (((buf[3] & 0x20) << 7) |
795 ((buf[1] & 0xf0) << 4) |
796 buf[5]);
797 hw->z = buf[2];
798
799 hw->left = (buf[0] & 0x01) ? 1 : 0;
800 hw->right = (buf[0] & 0x02) ? 1 : 0;
801
802 if (priv->is_forcepad) {
803 /*
804 * ForcePads, like Clickpads, use middle button
805 * bits to report primary button clicks.
806 * Unfortunately they report primary button not
807 * only when user presses on the pad above certain
808 * threshold, but also when there are more than one
809 * finger on the touchpad, which interferes with
810 * out multi-finger gestures.
811 */
812 if (hw->z == 0) {
813 /* No contacts */
814 priv->press = priv->report_press = false;
815 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
816 /*
817 * Single-finger touch with pressure above
818 * the threshold. If pressure stays long
819 * enough, we'll start reporting primary
820 * button. We rely on the device continuing
821 * sending data even if finger does not
822 * move.
823 */
824 if (!priv->press) {
825 priv->press_start = jiffies;
826 priv->press = true;
827 } else if (time_after(jiffies,
828 priv->press_start +
829 msecs_to_jiffies(50))) {
830 priv->report_press = true;
831 }
832 } else {
833 priv->press = false;
834 }
835
836 hw->left = priv->report_press;
837
838 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
839 /*
840 * Clickpad's button is transmitted as middle button,
841 * however, since it is primary button, we will report
842 * it as BTN_LEFT.
843 */
844 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
845
846 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
847 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
848 if (hw->w == 2)
849 hw->scroll = (s8)buf[1];
850 }
851
852 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
853 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
854 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
855 }
856
857 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
858 ((buf[0] ^ buf[3]) & 0x02)) {
859 synaptics_parse_ext_buttons(buf, priv, hw);
860 }
861 } else {
862 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
863 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
864
865 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
866 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
867
868 hw->left = (buf[0] & 0x01) ? 1 : 0;
869 hw->right = (buf[0] & 0x02) ? 1 : 0;
870 }
871
872 /*
873 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
874 * is used by some firmware to indicate a finger at the edge of
875 * the touchpad whose precise position cannot be determined, so
876 * convert these values to the maximum axis value.
877 */
878 if (hw->x > X_MAX_POSITIVE)
879 hw->x -= 1 << ABS_POS_BITS;
880 else if (hw->x == X_MAX_POSITIVE)
881 hw->x = XMAX;
882
883 if (hw->y > Y_MAX_POSITIVE)
884 hw->y -= 1 << ABS_POS_BITS;
885 else if (hw->y == Y_MAX_POSITIVE)
886 hw->y = YMAX;
887
888 return 0;
889}
890
891static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
892 bool active, int x, int y)
893{
894 input_mt_slot(dev, slot);
895 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
896 if (active) {
897 input_report_abs(dev, ABS_MT_POSITION_X, x);
898 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
899 }
900}
901
902static void synaptics_report_semi_mt_data(struct input_dev *dev,
903 const struct synaptics_hw_state *a,
904 const struct synaptics_hw_state *b,
905 int num_fingers)
906{
907 if (num_fingers >= 2) {
908 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
909 min(a->y, b->y));
910 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
911 max(a->y, b->y));
912 } else if (num_fingers == 1) {
913 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
914 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
915 } else {
916 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
917 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
918 }
919}
920
921static void synaptics_report_ext_buttons(struct psmouse *psmouse,
922 const struct synaptics_hw_state *hw)
923{
924 struct input_dev *dev = psmouse->dev;
925 struct synaptics_data *priv = psmouse->private;
926 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
927 int i;
928
929 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
930 return;
931
932 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
933 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
934 SYN_ID_FULL(priv->info.identity) == 0x802) &&
935 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
936 return;
937
938 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
939 for (i = 0; i < ext_bits; i++) {
940 input_report_key(dev, BTN_0 + 2 * i,
941 hw->ext_buttons & BIT(i));
942 input_report_key(dev, BTN_1 + 2 * i,
943 hw->ext_buttons & BIT(i + ext_bits));
944 }
945 return;
946 }
947
948 /*
949 * This generation of touchpads has the trackstick buttons
950 * physically wired to the touchpad. Re-route them through
951 * the pass-through interface.
952 */
953 if (priv->pt_port) {
954 u8 pt_buttons;
955
956 /* The trackstick expects at most 3 buttons */
957 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
958 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
959 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
960
961 serio_interrupt(priv->pt_port,
962 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
963 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
964 }
965}
966
967static void synaptics_report_buttons(struct psmouse *psmouse,
968 const struct synaptics_hw_state *hw)
969{
970 struct input_dev *dev = psmouse->dev;
971 struct synaptics_data *priv = psmouse->private;
972
973 input_report_key(dev, BTN_LEFT, hw->left);
974 input_report_key(dev, BTN_RIGHT, hw->right);
975
976 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
977 input_report_key(dev, BTN_MIDDLE, hw->middle);
978
979 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
980 input_report_key(dev, BTN_FORWARD, hw->up);
981 input_report_key(dev, BTN_BACK, hw->down);
982 }
983
984 synaptics_report_ext_buttons(psmouse, hw);
985}
986
987static void synaptics_report_mt_data(struct psmouse *psmouse,
988 const struct synaptics_hw_state *sgm,
989 int num_fingers)
990{
991 struct input_dev *dev = psmouse->dev;
992 struct synaptics_data *priv = psmouse->private;
993 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
994 struct input_mt_pos pos[2];
995 int slot[2], nsemi, i;
996
997 nsemi = clamp_val(num_fingers, 0, 2);
998
999 for (i = 0; i < nsemi; i++) {
1000 pos[i].x = hw[i]->x;
1001 pos[i].y = synaptics_invert_y(hw[i]->y);
1002 }
1003
1004 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1005
1006 for (i = 0; i < nsemi; i++) {
1007 input_mt_slot(dev, slot[i]);
1008 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1009 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1010 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1011 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1012 }
1013
1014 input_mt_drop_unused(dev);
1015
1016 /* Don't use active slot count to generate BTN_TOOL events. */
1017 input_mt_report_pointer_emulation(dev, false);
1018
1019 /* Send the number of fingers reported by touchpad itself. */
1020 input_mt_report_finger_count(dev, num_fingers);
1021
1022 synaptics_report_buttons(psmouse, sgm);
1023
1024 input_sync(dev);
1025}
1026
1027static void synaptics_image_sensor_process(struct psmouse *psmouse,
1028 struct synaptics_hw_state *sgm)
1029{
1030 struct synaptics_data *priv = psmouse->private;
1031 int num_fingers;
1032
1033 /*
1034 * Update mt_state using the new finger count and current mt_state.
1035 */
1036 if (sgm->z == 0)
1037 num_fingers = 0;
1038 else if (sgm->w >= 4)
1039 num_fingers = 1;
1040 else if (sgm->w == 0)
1041 num_fingers = 2;
1042 else if (sgm->w == 1)
1043 num_fingers = priv->agm_count ? priv->agm_count : 3;
1044 else
1045 num_fingers = 4;
1046
1047 /* Send resulting input events to user space */
1048 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1049}
1050
1051static bool synaptics_has_multifinger(struct synaptics_data *priv)
1052{
1053 if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1054 return true;
1055
1056 /* Advanced gesture mode also sends multi finger data */
1057 return synaptics_has_agm(priv);
1058}
1059
1060/*
1061 * called for each full received packet from the touchpad
1062 */
1063static void synaptics_process_packet(struct psmouse *psmouse)
1064{
1065 struct input_dev *dev = psmouse->dev;
1066 struct synaptics_data *priv = psmouse->private;
1067 struct synaptics_device_info *info = &priv->info;
1068 struct synaptics_hw_state hw;
1069 int num_fingers;
1070 int finger_width;
1071
1072 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1073 return;
1074
1075 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1076 synaptics_image_sensor_process(psmouse, &hw);
1077 return;
1078 }
1079
1080 if (hw.scroll) {
1081 priv->scroll += hw.scroll;
1082
1083 while (priv->scroll >= 4) {
1084 input_report_key(dev, BTN_BACK, !hw.down);
1085 input_sync(dev);
1086 input_report_key(dev, BTN_BACK, hw.down);
1087 input_sync(dev);
1088 priv->scroll -= 4;
1089 }
1090 while (priv->scroll <= -4) {
1091 input_report_key(dev, BTN_FORWARD, !hw.up);
1092 input_sync(dev);
1093 input_report_key(dev, BTN_FORWARD, hw.up);
1094 input_sync(dev);
1095 priv->scroll += 4;
1096 }
1097 return;
1098 }
1099
1100 if (hw.z > 0 && hw.x > 1) {
1101 num_fingers = 1;
1102 finger_width = 5;
1103 if (SYN_CAP_EXTENDED(info->capabilities)) {
1104 switch (hw.w) {
1105 case 0 ... 1:
1106 if (synaptics_has_multifinger(priv))
1107 num_fingers = hw.w + 2;
1108 break;
1109 case 2:
1110 /*
1111 * SYN_MODEL_PEN(info->model_id): even if
1112 * the device supports pen, we treat it as
1113 * a single finger.
1114 */
1115 break;
1116 case 4 ... 15:
1117 if (SYN_CAP_PALMDETECT(info->capabilities))
1118 finger_width = hw.w;
1119 break;
1120 }
1121 }
1122 } else {
1123 num_fingers = 0;
1124 finger_width = 0;
1125 }
1126
1127 if (cr48_profile_sensor) {
1128 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1129 return;
1130 }
1131
1132 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1133 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1134 num_fingers);
1135
1136 /* Post events
1137 * BTN_TOUCH has to be first as mousedev relies on it when doing
1138 * absolute -> relative conversion
1139 */
1140 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1141 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1142
1143 if (num_fingers > 0) {
1144 input_report_abs(dev, ABS_X, hw.x);
1145 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1146 }
1147 input_report_abs(dev, ABS_PRESSURE, hw.z);
1148
1149 if (SYN_CAP_PALMDETECT(info->capabilities))
1150 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1151
1152 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1153 if (synaptics_has_multifinger(priv)) {
1154 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1155 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1156 }
1157
1158 synaptics_report_buttons(psmouse, &hw);
1159
1160 input_sync(dev);
1161}
1162
1163static bool synaptics_validate_byte(struct psmouse *psmouse,
1164 int idx, enum synaptics_pkt_type pkt_type)
1165{
1166 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1167 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1168 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1169 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1170 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1171 const u8 *packet = psmouse->packet;
1172
1173 if (idx < 0 || idx > 4)
1174 return false;
1175
1176 switch (pkt_type) {
1177
1178 case SYN_NEWABS:
1179 case SYN_NEWABS_RELAXED:
1180 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1181
1182 case SYN_NEWABS_STRICT:
1183 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1184
1185 case SYN_OLDABS:
1186 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1187
1188 default:
1189 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1190 return false;
1191 }
1192}
1193
1194static enum synaptics_pkt_type
1195synaptics_detect_pkt_type(struct psmouse *psmouse)
1196{
1197 int i;
1198
1199 for (i = 0; i < 5; i++) {
1200 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1201 psmouse_info(psmouse, "using relaxed packet validation\n");
1202 return SYN_NEWABS_RELAXED;
1203 }
1204 }
1205
1206 return SYN_NEWABS_STRICT;
1207}
1208
1209static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1210{
1211 struct synaptics_data *priv = psmouse->private;
1212
1213 if (psmouse->pktcnt >= 6) { /* Full packet received */
1214 if (unlikely(priv->pkt_type == SYN_NEWABS))
1215 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1216
1217 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1218 synaptics_is_pt_packet(psmouse->packet)) {
1219 if (priv->pt_port)
1220 synaptics_pass_pt_packet(priv->pt_port,
1221 psmouse->packet);
1222 } else
1223 synaptics_process_packet(psmouse);
1224
1225 return PSMOUSE_FULL_PACKET;
1226 }
1227
1228 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1229 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1230}
1231
1232/*****************************************************************************
1233 * Driver initialization/cleanup functions
1234 ****************************************************************************/
1235static void set_abs_position_params(struct input_dev *dev,
1236 struct synaptics_device_info *info,
1237 int x_code, int y_code)
1238{
1239 int x_min = info->x_min ?: XMIN_NOMINAL;
1240 int x_max = info->x_max ?: XMAX_NOMINAL;
1241 int y_min = info->y_min ?: YMIN_NOMINAL;
1242 int y_max = info->y_max ?: YMAX_NOMINAL;
1243 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1244 SYN_REDUCED_FILTER_FUZZ : 0;
1245
1246 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1247 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1248 input_abs_set_res(dev, x_code, info->x_res);
1249 input_abs_set_res(dev, y_code, info->y_res);
1250}
1251
1252static int set_input_params(struct psmouse *psmouse,
1253 struct synaptics_data *priv)
1254{
1255 struct input_dev *dev = psmouse->dev;
1256 struct synaptics_device_info *info = &priv->info;
1257 int i;
1258 int error;
1259
1260 /* Reset default psmouse capabilities */
1261 __clear_bit(EV_REL, dev->evbit);
1262 bitmap_zero(dev->relbit, REL_CNT);
1263 bitmap_zero(dev->keybit, KEY_CNT);
1264
1265 /* Things that apply to both modes */
1266 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1267
1268 input_set_capability(dev, EV_KEY, BTN_LEFT);
1269
1270 /* Clickpads report only left button */
1271 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1272 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1273 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1274 input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1275 }
1276
1277 if (!priv->absolute_mode) {
1278 /* Relative mode */
1279 input_set_capability(dev, EV_REL, REL_X);
1280 input_set_capability(dev, EV_REL, REL_Y);
1281 return 0;
1282 }
1283
1284 /* Absolute mode */
1285 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1286 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1287
1288 if (cr48_profile_sensor)
1289 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1290
1291 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1292 set_abs_position_params(dev, info,
1293 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1294 /* Image sensors can report per-contact pressure */
1295 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1296
1297 error = input_mt_init_slots(dev, 2,
1298 INPUT_MT_POINTER | INPUT_MT_TRACK);
1299 if (error)
1300 return error;
1301
1302 /* Image sensors can signal 4 and 5 finger clicks */
1303 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1304 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1305 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1306 set_abs_position_params(dev, info,
1307 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1308 /*
1309 * Profile sensor in CR-48 tracks contacts reasonably well,
1310 * other non-image sensors with AGM use semi-mt.
1311 */
1312 error = input_mt_init_slots(dev, 2,
1313 INPUT_MT_POINTER |
1314 (cr48_profile_sensor ?
1315 INPUT_MT_TRACK :
1316 INPUT_MT_SEMI_MT));
1317 if (error)
1318 return error;
1319
1320 /*
1321 * For semi-mt devices we send ABS_X/Y ourselves instead of
1322 * input_mt_report_pointer_emulation. But
1323 * input_mt_init_slots() resets the fuzz to 0, leading to a
1324 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1325 * position. Let's re-initialize ABS_X/Y here.
1326 */
1327 if (!cr48_profile_sensor)
1328 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1329 }
1330
1331 if (SYN_CAP_PALMDETECT(info->capabilities))
1332 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1333
1334 input_set_capability(dev, EV_KEY, BTN_TOUCH);
1335 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1336
1337 if (synaptics_has_multifinger(priv)) {
1338 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1339 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1340 }
1341
1342 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1343 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1344 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1345 input_set_capability(dev, EV_KEY, BTN_BACK);
1346 }
1347
1348 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1349 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1350 input_set_capability(dev, EV_KEY, BTN_0 + i);
1351
1352 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1353 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1354 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1355 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1356 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1357 }
1358
1359 return 0;
1360}
1361
1362static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1363 void *data, char *buf)
1364{
1365 struct synaptics_data *priv = psmouse->private;
1366
1367 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1368}
1369
1370static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1371 void *data, const char *buf,
1372 size_t len)
1373{
1374 struct synaptics_data *priv = psmouse->private;
1375 unsigned int value;
1376 int err;
1377
1378 err = kstrtouint(buf, 10, &value);
1379 if (err)
1380 return err;
1381
1382 if (value > 1)
1383 return -EINVAL;
1384
1385 if (value == priv->disable_gesture)
1386 return len;
1387
1388 priv->disable_gesture = value;
1389 if (value)
1390 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1391 else
1392 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1393
1394 if (synaptics_mode_cmd(psmouse, priv->mode))
1395 return -EIO;
1396
1397 return len;
1398}
1399
1400PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1401 synaptics_show_disable_gesture,
1402 synaptics_set_disable_gesture);
1403
1404static void synaptics_disconnect(struct psmouse *psmouse)
1405{
1406 struct synaptics_data *priv = psmouse->private;
1407
1408 /*
1409 * We might have left a breadcrumb when trying to
1410 * set up SMbus companion.
1411 */
1412 psmouse_smbus_cleanup(psmouse);
1413
1414 if (!priv->absolute_mode &&
1415 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1416 device_remove_file(&psmouse->ps2dev.serio->dev,
1417 &psmouse_attr_disable_gesture.dattr);
1418
1419 synaptics_reset(psmouse);
1420 kfree(priv);
1421 psmouse->private = NULL;
1422}
1423
1424static int synaptics_reconnect(struct psmouse *psmouse)
1425{
1426 struct synaptics_data *priv = psmouse->private;
1427 struct synaptics_device_info info;
1428 u8 param[2];
1429 int retry = 0;
1430 int error;
1431
1432 do {
1433 psmouse_reset(psmouse);
1434 if (retry) {
1435 /*
1436 * On some boxes, right after resuming, the touchpad
1437 * needs some time to finish initializing (I assume
1438 * it needs time to calibrate) and start responding
1439 * to Synaptics-specific queries, so let's wait a
1440 * bit.
1441 */
1442 ssleep(1);
1443 }
1444 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1445 error = synaptics_detect(psmouse, 0);
1446 } while (error && ++retry < 3);
1447
1448 if (error)
1449 return error;
1450
1451 if (retry > 1)
1452 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1453
1454 error = synaptics_query_hardware(psmouse, &info);
1455 if (error) {
1456 psmouse_err(psmouse, "Unable to query device.\n");
1457 return error;
1458 }
1459
1460 error = synaptics_set_mode(psmouse);
1461 if (error) {
1462 psmouse_err(psmouse, "Unable to initialize device.\n");
1463 return error;
1464 }
1465
1466 if (info.identity != priv->info.identity ||
1467 info.model_id != priv->info.model_id ||
1468 info.capabilities != priv->info.capabilities ||
1469 info.ext_cap != priv->info.ext_cap) {
1470 psmouse_err(psmouse,
1471 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1472 priv->info.identity, info.identity,
1473 priv->info.model_id, info.model_id,
1474 priv->info.capabilities, info.capabilities,
1475 priv->info.ext_cap, info.ext_cap);
1476 return -ENXIO;
1477 }
1478
1479 return 0;
1480}
1481
1482static bool impaired_toshiba_kbc;
1483
1484static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1485#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1486 {
1487 /* Toshiba Satellite */
1488 .matches = {
1489 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1490 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1491 },
1492 },
1493 {
1494 /* Toshiba Dynabook */
1495 .matches = {
1496 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1497 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1498 },
1499 },
1500 {
1501 /* Toshiba Portege M300 */
1502 .matches = {
1503 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1504 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1505 },
1506
1507 },
1508 {
1509 /* Toshiba Portege M300 */
1510 .matches = {
1511 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1512 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1513 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1514 },
1515
1516 },
1517#endif
1518 { }
1519};
1520
1521static bool broken_olpc_ec;
1522
1523static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1524#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1525 {
1526 /* OLPC XO-1 or XO-1.5 */
1527 .matches = {
1528 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1529 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1530 },
1531 },
1532#endif
1533 { }
1534};
1535
1536static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1537#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1538 {
1539 /* Cr-48 Chromebook (Codename Mario) */
1540 .matches = {
1541 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1542 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1543 },
1544 },
1545#endif
1546 { }
1547};
1548
1549void __init synaptics_module_init(void)
1550{
1551 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1552 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1553 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1554}
1555
1556static int synaptics_init_ps2(struct psmouse *psmouse,
1557 struct synaptics_device_info *info,
1558 bool absolute_mode)
1559{
1560 struct synaptics_data *priv;
1561 int err;
1562
1563 synaptics_apply_quirks(psmouse, info);
1564
1565 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1566 if (!priv)
1567 return -ENOMEM;
1568
1569 priv->info = *info;
1570 priv->absolute_mode = absolute_mode;
1571 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1572 priv->disable_gesture = true;
1573
1574 /*
1575 * Unfortunately ForcePad capability is not exported over PS/2,
1576 * so we have to resort to checking PNP IDs.
1577 */
1578 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1579
1580 err = synaptics_set_mode(psmouse);
1581 if (err) {
1582 psmouse_err(psmouse, "Unable to initialize device.\n");
1583 goto init_fail;
1584 }
1585
1586 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1587 SYN_NEWABS : SYN_OLDABS;
1588
1589 psmouse_info(psmouse,
1590 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1591 SYN_ID_MODEL(info->identity),
1592 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1593 info->model_id,
1594 info->capabilities, info->ext_cap, info->ext_cap_0c,
1595 info->ext_cap_10, info->board_id, info->firmware_id);
1596
1597 err = set_input_params(psmouse, priv);
1598 if (err) {
1599 psmouse_err(psmouse,
1600 "failed to set up capabilities: %d\n", err);
1601 goto init_fail;
1602 }
1603
1604 /*
1605 * Encode touchpad model so that it can be used to set
1606 * input device->id.version and be visible to userspace.
1607 * Because version is __u16 we have to drop something.
1608 * Hardware info bits seem to be good candidates as they
1609 * are documented to be for Synaptics corp. internal use.
1610 */
1611 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1612 (info->model_id & 0x000000ff);
1613
1614 if (absolute_mode) {
1615 psmouse->protocol_handler = synaptics_process_byte;
1616 psmouse->pktsize = 6;
1617 } else {
1618 /* Relative mode follows standard PS/2 mouse protocol */
1619 psmouse->protocol_handler = psmouse_process_byte;
1620 psmouse->pktsize = 3;
1621 }
1622
1623 psmouse->set_rate = synaptics_set_rate;
1624 psmouse->disconnect = synaptics_disconnect;
1625 psmouse->reconnect = synaptics_reconnect;
1626 psmouse->cleanup = synaptics_reset;
1627 /* Synaptics can usually stay in sync without extra help */
1628 psmouse->resync_time = 0;
1629
1630 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1631 synaptics_pt_create(psmouse);
1632
1633 /*
1634 * Toshiba's KBC seems to have trouble handling data from
1635 * Synaptics at full rate. Switch to a lower rate (roughly
1636 * the same rate as a standard PS/2 mouse).
1637 */
1638 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1639 psmouse_info(psmouse,
1640 "Toshiba %s detected, limiting rate to 40pps.\n",
1641 dmi_get_system_info(DMI_PRODUCT_NAME));
1642 psmouse->rate = 40;
1643 }
1644
1645 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1646 err = device_create_file(&psmouse->ps2dev.serio->dev,
1647 &psmouse_attr_disable_gesture.dattr);
1648 if (err) {
1649 psmouse_err(psmouse,
1650 "Failed to create disable_gesture attribute (%d)",
1651 err);
1652 goto init_fail;
1653 }
1654 }
1655
1656 return 0;
1657
1658 init_fail:
1659 kfree(priv);
1660 return err;
1661}
1662
1663static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1664{
1665 struct synaptics_device_info info;
1666 int error;
1667
1668 psmouse_reset(psmouse);
1669
1670 error = synaptics_query_hardware(psmouse, &info);
1671 if (error) {
1672 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1673 return error;
1674 }
1675
1676 return synaptics_init_ps2(psmouse, &info, absolute_mode);
1677}
1678
1679int synaptics_init_absolute(struct psmouse *psmouse)
1680{
1681 return __synaptics_init(psmouse, true);
1682}
1683
1684int synaptics_init_relative(struct psmouse *psmouse)
1685{
1686 return __synaptics_init(psmouse, false);
1687}
1688
1689static int synaptics_setup_ps2(struct psmouse *psmouse,
1690 struct synaptics_device_info *info)
1691{
1692 bool absolute_mode = true;
1693 int error;
1694
1695 /*
1696 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1697 * packet spew overloads the EC such that key presses on the keyboard
1698 * are missed. Given that, don't even attempt to use Absolute mode.
1699 * Relative mode seems to work just fine.
1700 */
1701 if (broken_olpc_ec) {
1702 psmouse_info(psmouse,
1703 "OLPC XO detected, forcing relative protocol.\n");
1704 absolute_mode = false;
1705 }
1706
1707 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1708 if (error)
1709 return error;
1710
1711 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1712}
1713
1714#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1715
1716void __init synaptics_module_init(void)
1717{
1718}
1719
1720static int __maybe_unused
1721synaptics_setup_ps2(struct psmouse *psmouse,
1722 struct synaptics_device_info *info)
1723{
1724 return -ENOSYS;
1725}
1726
1727#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1728
1729#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1730
1731/*
1732 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1733 * provides a better bandwidth and allow a better control of the touchpads.
1734 * This is used to decide if we need to use this bus or not.
1735 */
1736enum {
1737 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1738 SYNAPTICS_INTERTOUCH_OFF,
1739 SYNAPTICS_INTERTOUCH_ON,
1740};
1741
1742static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1743 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1744module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1745MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1746
1747static int synaptics_create_intertouch(struct psmouse *psmouse,
1748 struct synaptics_device_info *info,
1749 bool leave_breadcrumbs)
1750{
1751 bool topbuttonpad =
1752 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1753 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1754 const struct rmi_device_platform_data pdata = {
1755 .sensor_pdata = {
1756 .sensor_type = rmi_sensor_touchpad,
1757 .axis_align.flip_y = true,
1758 .kernel_tracking = false,
1759 .topbuttonpad = topbuttonpad,
1760 },
1761 .gpio_data = {
1762 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1763 .trackstick_buttons =
1764 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1765 },
1766 };
1767 const struct i2c_board_info intertouch_board = {
1768 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1769 .flags = I2C_CLIENT_HOST_NOTIFY,
1770 };
1771
1772 return psmouse_smbus_init(psmouse, &intertouch_board,
1773 &pdata, sizeof(pdata), true,
1774 leave_breadcrumbs);
1775}
1776
1777/*
1778 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1779 * and decides to instantiate a SMBus InterTouch device.
1780 */
1781static int synaptics_setup_intertouch(struct psmouse *psmouse,
1782 struct synaptics_device_info *info,
1783 bool leave_breadcrumbs)
1784{
1785 int error;
1786
1787 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1788 return -ENXIO;
1789
1790 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1791 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1792 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1793
1794 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1795 psmouse_info(psmouse,
1796 "Your touchpad (%s) says it can support a different bus. "
1797 "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",
1798 psmouse->ps2dev.serio->firmware_id);
1799
1800 return -ENXIO;
1801 }
1802 }
1803
1804 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1805
1806 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1807 if (error) {
1808 if (error == -EAGAIN)
1809 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1810 else
1811 psmouse_err(psmouse, "unable to create intertouch device\n");
1812
1813 return error;
1814 }
1815
1816 return 0;
1817}
1818
1819int synaptics_init_smbus(struct psmouse *psmouse)
1820{
1821 struct synaptics_device_info info;
1822 int error;
1823
1824 psmouse_reset(psmouse);
1825
1826 error = synaptics_query_hardware(psmouse, &info);
1827 if (error) {
1828 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1829 return error;
1830 }
1831
1832 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1833 return -ENXIO;
1834
1835 return synaptics_create_intertouch(psmouse, &info, false);
1836}
1837
1838#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1839
1840static int __maybe_unused
1841synaptics_setup_intertouch(struct psmouse *psmouse,
1842 struct synaptics_device_info *info,
1843 bool leave_breadcrumbs)
1844{
1845 return -ENOSYS;
1846}
1847
1848int synaptics_init_smbus(struct psmouse *psmouse)
1849{
1850 return -ENOSYS;
1851}
1852
1853#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1854
1855#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1856 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1857
1858int synaptics_init(struct psmouse *psmouse)
1859{
1860 struct synaptics_device_info info;
1861 int error;
1862 int retval;
1863
1864 psmouse_reset(psmouse);
1865
1866 error = synaptics_query_hardware(psmouse, &info);
1867 if (error) {
1868 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1869 return error;
1870 }
1871
1872 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1873 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1874 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1875 /* Forcepads need F21, which is not ready */
1876 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1877 psmouse_warn(psmouse,
1878 "The touchpad can support a better bus than the too old PS/2 protocol. "
1879 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1880 }
1881
1882 error = synaptics_setup_intertouch(psmouse, &info, true);
1883 if (!error)
1884 return PSMOUSE_SYNAPTICS_SMBUS;
1885 }
1886
1887 retval = synaptics_setup_ps2(psmouse, &info);
1888 if (retval < 0) {
1889 /*
1890 * Not using any flavor of Synaptics support, so clean up
1891 * SMbus breadcrumbs, if any.
1892 */
1893 psmouse_smbus_cleanup(psmouse);
1894 }
1895
1896 return retval;
1897}
1898
1899#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1900
1901int synaptics_init(struct psmouse *psmouse)
1902{
1903 return -ENOSYS;
1904}
1905
1906#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 * Any position values from the hardware above the following limits are
57 * treated as "wrapped around negative" values that have been truncated to
58 * the 13-bit reporting range of the hardware. These are just reasonable
59 * guesses and can be adjusted if hardware is found that operates outside
60 * of these parameters.
61 */
62#define X_MAX_POSITIVE (((1 << ABS_POS_BITS) + XMAX) / 2)
63#define Y_MAX_POSITIVE (((1 << ABS_POS_BITS) + YMAX) / 2)
64
65/*****************************************************************************
66 * Stuff we need even when we do not want native Synaptics support
67 ****************************************************************************/
68
69/*
70 * Set the synaptics touchpad mode byte by special commands
71 */
72static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
73{
74 unsigned char param[1];
75
76 if (psmouse_sliced_command(psmouse, mode))
77 return -1;
78 param[0] = SYN_PS_SET_MODE2;
79 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
80 return -1;
81 return 0;
82}
83
84int synaptics_detect(struct psmouse *psmouse, bool set_properties)
85{
86 struct ps2dev *ps2dev = &psmouse->ps2dev;
87 unsigned char param[4];
88
89 param[0] = 0;
90
91 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
92 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
93 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
94 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
95 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
96
97 if (param[1] != 0x47)
98 return -ENODEV;
99
100 if (set_properties) {
101 psmouse->vendor = "Synaptics";
102 psmouse->name = "TouchPad";
103 }
104
105 return 0;
106}
107
108void synaptics_reset(struct psmouse *psmouse)
109{
110 /* reset touchpad back to relative mode, gestures enabled */
111 synaptics_mode_cmd(psmouse, 0);
112}
113
114#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
115
116/*****************************************************************************
117 * Synaptics communications functions
118 ****************************************************************************/
119
120/*
121 * Synaptics touchpads report the y coordinate from bottom to top, which is
122 * opposite from what userspace expects.
123 * This function is used to invert y before reporting.
124 */
125static int synaptics_invert_y(int y)
126{
127 return YMAX_NOMINAL + YMIN_NOMINAL - y;
128}
129
130/*
131 * Send a command to the synpatics touchpad by special commands
132 */
133static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
134{
135 if (psmouse_sliced_command(psmouse, c))
136 return -1;
137 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
138 return -1;
139 return 0;
140}
141
142/*
143 * Read the model-id bytes from the touchpad
144 * see also SYN_MODEL_* macros
145 */
146static int synaptics_model_id(struct psmouse *psmouse)
147{
148 struct synaptics_data *priv = psmouse->private;
149 unsigned char mi[3];
150
151 if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
152 return -1;
153 priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
154 return 0;
155}
156
157/*
158 * Read the capability-bits from the touchpad
159 * see also the SYN_CAP_* macros
160 */
161static int synaptics_capability(struct psmouse *psmouse)
162{
163 struct synaptics_data *priv = psmouse->private;
164 unsigned char cap[3];
165
166 if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
167 return -1;
168 priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
169 priv->ext_cap = priv->ext_cap_0c = 0;
170
171 /*
172 * Older firmwares had submodel ID fixed to 0x47
173 */
174 if (SYN_ID_FULL(priv->identity) < 0x705 &&
175 SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
176 return -1;
177 }
178
179 /*
180 * Unless capExtended is set the rest of the flags should be ignored
181 */
182 if (!SYN_CAP_EXTENDED(priv->capabilities))
183 priv->capabilities = 0;
184
185 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
186 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
187 psmouse_warn(psmouse,
188 "device claims to have extended capabilities, but I'm not able to read them.\n");
189 } else {
190 priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
191
192 /*
193 * if nExtBtn is greater than 8 it should be considered
194 * invalid and treated as 0
195 */
196 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
197 priv->ext_cap &= 0xff0fff;
198 }
199 }
200
201 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
202 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
203 psmouse_warn(psmouse,
204 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
205 } else {
206 priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
207 }
208 }
209
210 return 0;
211}
212
213/*
214 * Identify Touchpad
215 * See also the SYN_ID_* macros
216 */
217static int synaptics_identify(struct psmouse *psmouse)
218{
219 struct synaptics_data *priv = psmouse->private;
220 unsigned char id[3];
221
222 if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
223 return -1;
224 priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
225 if (SYN_ID_IS_SYNAPTICS(priv->identity))
226 return 0;
227 return -1;
228}
229
230/*
231 * Read touchpad resolution and maximum reported coordinates
232 * Resolution is left zero if touchpad does not support the query
233 */
234static int synaptics_resolution(struct psmouse *psmouse)
235{
236 struct synaptics_data *priv = psmouse->private;
237 unsigned char resp[3];
238
239 if (SYN_ID_MAJOR(priv->identity) < 4)
240 return 0;
241
242 if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
243 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
244 priv->x_res = resp[0]; /* x resolution in units/mm */
245 priv->y_res = resp[2]; /* y resolution in units/mm */
246 }
247 }
248
249 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
250 SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
251 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
252 psmouse_warn(psmouse,
253 "device claims to have max coordinates query, but I'm not able to read it.\n");
254 } else {
255 priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
256 priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
257 }
258 }
259
260 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
261 SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
262 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
263 psmouse_warn(psmouse,
264 "device claims to have min coordinates query, but I'm not able to read it.\n");
265 } else {
266 priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
267 priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
268 }
269 }
270
271 return 0;
272}
273
274static int synaptics_query_hardware(struct psmouse *psmouse)
275{
276 if (synaptics_identify(psmouse))
277 return -1;
278 if (synaptics_model_id(psmouse))
279 return -1;
280 if (synaptics_capability(psmouse))
281 return -1;
282 if (synaptics_resolution(psmouse))
283 return -1;
284
285 return 0;
286}
287
288static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
289{
290 static unsigned char param = 0xc8;
291 struct synaptics_data *priv = psmouse->private;
292
293 if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
294 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
295 return 0;
296
297 if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
298 return -1;
299
300 if (ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE))
301 return -1;
302
303 /* Advanced gesture mode also sends multi finger data */
304 priv->capabilities |= BIT(1);
305
306 return 0;
307}
308
309static int synaptics_set_mode(struct psmouse *psmouse)
310{
311 struct synaptics_data *priv = psmouse->private;
312
313 priv->mode = 0;
314 if (priv->absolute_mode)
315 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
316 if (priv->disable_gesture)
317 priv->mode |= SYN_BIT_DISABLE_GESTURE;
318 if (psmouse->rate >= 80)
319 priv->mode |= SYN_BIT_HIGH_RATE;
320 if (SYN_CAP_EXTENDED(priv->capabilities))
321 priv->mode |= SYN_BIT_W_MODE;
322
323 if (synaptics_mode_cmd(psmouse, priv->mode))
324 return -1;
325
326 if (priv->absolute_mode &&
327 synaptics_set_advanced_gesture_mode(psmouse)) {
328 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
329 return -1;
330 }
331
332 return 0;
333}
334
335static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
336{
337 struct synaptics_data *priv = psmouse->private;
338
339 if (rate >= 80) {
340 priv->mode |= SYN_BIT_HIGH_RATE;
341 psmouse->rate = 80;
342 } else {
343 priv->mode &= ~SYN_BIT_HIGH_RATE;
344 psmouse->rate = 40;
345 }
346
347 synaptics_mode_cmd(psmouse, priv->mode);
348}
349
350/*****************************************************************************
351 * Synaptics pass-through PS/2 port support
352 ****************************************************************************/
353static int synaptics_pt_write(struct serio *serio, unsigned char c)
354{
355 struct psmouse *parent = serio_get_drvdata(serio->parent);
356 char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
357
358 if (psmouse_sliced_command(parent, c))
359 return -1;
360 if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
361 return -1;
362 return 0;
363}
364
365static int synaptics_pt_start(struct serio *serio)
366{
367 struct psmouse *parent = serio_get_drvdata(serio->parent);
368 struct synaptics_data *priv = parent->private;
369
370 serio_pause_rx(parent->ps2dev.serio);
371 priv->pt_port = serio;
372 serio_continue_rx(parent->ps2dev.serio);
373
374 return 0;
375}
376
377static void synaptics_pt_stop(struct serio *serio)
378{
379 struct psmouse *parent = serio_get_drvdata(serio->parent);
380 struct synaptics_data *priv = parent->private;
381
382 serio_pause_rx(parent->ps2dev.serio);
383 priv->pt_port = NULL;
384 serio_continue_rx(parent->ps2dev.serio);
385}
386
387static int synaptics_is_pt_packet(unsigned char *buf)
388{
389 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
390}
391
392static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
393{
394 struct psmouse *child = serio_get_drvdata(ptport);
395
396 if (child && child->state == PSMOUSE_ACTIVATED) {
397 serio_interrupt(ptport, packet[1], 0);
398 serio_interrupt(ptport, packet[4], 0);
399 serio_interrupt(ptport, packet[5], 0);
400 if (child->pktsize == 4)
401 serio_interrupt(ptport, packet[2], 0);
402 } else
403 serio_interrupt(ptport, packet[1], 0);
404}
405
406static void synaptics_pt_activate(struct psmouse *psmouse)
407{
408 struct synaptics_data *priv = psmouse->private;
409 struct psmouse *child = serio_get_drvdata(priv->pt_port);
410
411 /* adjust the touchpad to child's choice of protocol */
412 if (child) {
413 if (child->pktsize == 4)
414 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
415 else
416 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
417
418 if (synaptics_mode_cmd(psmouse, priv->mode))
419 psmouse_warn(psmouse,
420 "failed to switch guest protocol\n");
421 }
422}
423
424static void synaptics_pt_create(struct psmouse *psmouse)
425{
426 struct serio *serio;
427
428 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
429 if (!serio) {
430 psmouse_err(psmouse,
431 "not enough memory for pass-through port\n");
432 return;
433 }
434
435 serio->id.type = SERIO_PS_PSTHRU;
436 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
437 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
438 serio->write = synaptics_pt_write;
439 serio->start = synaptics_pt_start;
440 serio->stop = synaptics_pt_stop;
441 serio->parent = psmouse->ps2dev.serio;
442
443 psmouse->pt_activate = synaptics_pt_activate;
444
445 psmouse_info(psmouse, "serio: %s port at %s\n",
446 serio->name, psmouse->phys);
447 serio_register_port(serio);
448}
449
450/*****************************************************************************
451 * Functions to interpret the absolute mode packets
452 ****************************************************************************/
453
454static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
455 int sgm, int agm)
456{
457 state->count = count;
458 state->sgm = sgm;
459 state->agm = agm;
460}
461
462static void synaptics_parse_agm(const unsigned char buf[],
463 struct synaptics_data *priv,
464 struct synaptics_hw_state *hw)
465{
466 struct synaptics_hw_state *agm = &priv->agm;
467 int agm_packet_type;
468
469 agm_packet_type = (buf[5] & 0x30) >> 4;
470 switch (agm_packet_type) {
471 case 1:
472 /* Gesture packet: (x, y, z) half resolution */
473 agm->w = hw->w;
474 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
475 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
476 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
477 break;
478
479 case 2:
480 /* AGM-CONTACT packet: (count, sgm, agm) */
481 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
482 break;
483
484 default:
485 break;
486 }
487
488 /* Record that at least one AGM has been received since last SGM */
489 priv->agm_pending = true;
490}
491
492static int synaptics_parse_hw_state(const unsigned char buf[],
493 struct synaptics_data *priv,
494 struct synaptics_hw_state *hw)
495{
496 memset(hw, 0, sizeof(struct synaptics_hw_state));
497
498 if (SYN_MODEL_NEWABS(priv->model_id)) {
499 hw->w = (((buf[0] & 0x30) >> 2) |
500 ((buf[0] & 0x04) >> 1) |
501 ((buf[3] & 0x04) >> 2));
502
503 hw->left = (buf[0] & 0x01) ? 1 : 0;
504 hw->right = (buf[0] & 0x02) ? 1 : 0;
505
506 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
507 /*
508 * Clickpad's button is transmitted as middle button,
509 * however, since it is primary button, we will report
510 * it as BTN_LEFT.
511 */
512 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
513
514 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
515 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
516 if (hw->w == 2)
517 hw->scroll = (signed char)(buf[1]);
518 }
519
520 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
521 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
522 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
523 }
524
525 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
526 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
527 hw->w == 2) {
528 synaptics_parse_agm(buf, priv, hw);
529 return 1;
530 }
531
532 hw->x = (((buf[3] & 0x10) << 8) |
533 ((buf[1] & 0x0f) << 8) |
534 buf[4]);
535 hw->y = (((buf[3] & 0x20) << 7) |
536 ((buf[1] & 0xf0) << 4) |
537 buf[5]);
538 hw->z = buf[2];
539
540 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
541 ((buf[0] ^ buf[3]) & 0x02)) {
542 switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
543 default:
544 /*
545 * if nExtBtn is greater than 8 it should be
546 * considered invalid and treated as 0
547 */
548 break;
549 case 8:
550 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
551 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
552 case 6:
553 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
554 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
555 case 4:
556 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
557 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
558 case 2:
559 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
560 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
561 }
562 }
563 } else {
564 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
565 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
566
567 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
568 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
569
570 hw->left = (buf[0] & 0x01) ? 1 : 0;
571 hw->right = (buf[0] & 0x02) ? 1 : 0;
572 }
573
574 /* Convert wrap-around values to negative */
575 if (hw->x > X_MAX_POSITIVE)
576 hw->x -= 1 << ABS_POS_BITS;
577 if (hw->y > Y_MAX_POSITIVE)
578 hw->y -= 1 << ABS_POS_BITS;
579
580 return 0;
581}
582
583static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
584 bool active, int x, int y)
585{
586 input_mt_slot(dev, slot);
587 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
588 if (active) {
589 input_report_abs(dev, ABS_MT_POSITION_X, x);
590 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
591 }
592}
593
594static void synaptics_report_semi_mt_data(struct input_dev *dev,
595 const struct synaptics_hw_state *a,
596 const struct synaptics_hw_state *b,
597 int num_fingers)
598{
599 if (num_fingers >= 2) {
600 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
601 min(a->y, b->y));
602 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
603 max(a->y, b->y));
604 } else if (num_fingers == 1) {
605 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
606 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
607 } else {
608 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
609 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
610 }
611}
612
613static void synaptics_report_buttons(struct psmouse *psmouse,
614 const struct synaptics_hw_state *hw)
615{
616 struct input_dev *dev = psmouse->dev;
617 struct synaptics_data *priv = psmouse->private;
618 int i;
619
620 input_report_key(dev, BTN_LEFT, hw->left);
621 input_report_key(dev, BTN_RIGHT, hw->right);
622
623 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
624 input_report_key(dev, BTN_MIDDLE, hw->middle);
625
626 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
627 input_report_key(dev, BTN_FORWARD, hw->up);
628 input_report_key(dev, BTN_BACK, hw->down);
629 }
630
631 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
632 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
633}
634
635static void synaptics_report_slot(struct input_dev *dev, int slot,
636 const struct synaptics_hw_state *hw)
637{
638 input_mt_slot(dev, slot);
639 input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
640 if (!hw)
641 return;
642
643 input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
644 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
645 input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
646}
647
648static void synaptics_report_mt_data(struct psmouse *psmouse,
649 struct synaptics_mt_state *mt_state,
650 const struct synaptics_hw_state *sgm)
651{
652 struct input_dev *dev = psmouse->dev;
653 struct synaptics_data *priv = psmouse->private;
654 struct synaptics_hw_state *agm = &priv->agm;
655 struct synaptics_mt_state *old = &priv->mt_state;
656
657 switch (mt_state->count) {
658 case 0:
659 synaptics_report_slot(dev, 0, NULL);
660 synaptics_report_slot(dev, 1, NULL);
661 break;
662 case 1:
663 if (mt_state->sgm == -1) {
664 synaptics_report_slot(dev, 0, NULL);
665 synaptics_report_slot(dev, 1, NULL);
666 } else if (mt_state->sgm == 0) {
667 synaptics_report_slot(dev, 0, sgm);
668 synaptics_report_slot(dev, 1, NULL);
669 } else {
670 synaptics_report_slot(dev, 0, NULL);
671 synaptics_report_slot(dev, 1, sgm);
672 }
673 break;
674 default:
675 /*
676 * If the finger slot contained in SGM is valid, and either
677 * hasn't changed, or is new, then report SGM in MTB slot 0.
678 * Otherwise, empty MTB slot 0.
679 */
680 if (mt_state->sgm != -1 &&
681 (mt_state->sgm == old->sgm || old->sgm == -1))
682 synaptics_report_slot(dev, 0, sgm);
683 else
684 synaptics_report_slot(dev, 0, NULL);
685
686 /*
687 * If the finger slot contained in AGM is valid, and either
688 * hasn't changed, or is new, then report AGM in MTB slot 1.
689 * Otherwise, empty MTB slot 1.
690 */
691 if (mt_state->agm != -1 &&
692 (mt_state->agm == old->agm || old->agm == -1))
693 synaptics_report_slot(dev, 1, agm);
694 else
695 synaptics_report_slot(dev, 1, NULL);
696 break;
697 }
698
699 /* Don't use active slot count to generate BTN_TOOL events. */
700 input_mt_report_pointer_emulation(dev, false);
701
702 /* Send the number of fingers reported by touchpad itself. */
703 input_mt_report_finger_count(dev, mt_state->count);
704
705 synaptics_report_buttons(psmouse, sgm);
706
707 input_sync(dev);
708}
709
710/* Handle case where mt_state->count = 0 */
711static void synaptics_image_sensor_0f(struct synaptics_data *priv,
712 struct synaptics_mt_state *mt_state)
713{
714 synaptics_mt_state_set(mt_state, 0, -1, -1);
715 priv->mt_state_lost = false;
716}
717
718/* Handle case where mt_state->count = 1 */
719static void synaptics_image_sensor_1f(struct synaptics_data *priv,
720 struct synaptics_mt_state *mt_state)
721{
722 struct synaptics_hw_state *agm = &priv->agm;
723 struct synaptics_mt_state *old = &priv->mt_state;
724
725 /*
726 * If the last AGM was (0,0,0), and there is only one finger left,
727 * then we absolutely know that SGM contains slot 0, and all other
728 * fingers have been removed.
729 */
730 if (priv->agm_pending && agm->z == 0) {
731 synaptics_mt_state_set(mt_state, 1, 0, -1);
732 priv->mt_state_lost = false;
733 return;
734 }
735
736 switch (old->count) {
737 case 0:
738 synaptics_mt_state_set(mt_state, 1, 0, -1);
739 break;
740 case 1:
741 /*
742 * If mt_state_lost, then the previous transition was 3->1,
743 * and SGM now contains either slot 0 or 1, but we don't know
744 * which. So, we just assume that the SGM now contains slot 1.
745 *
746 * If pending AGM and either:
747 * (a) the previous SGM slot contains slot 0, or
748 * (b) there was no SGM slot
749 * then, the SGM now contains slot 1
750 *
751 * Case (a) happens with very rapid "drum roll" gestures, where
752 * slot 0 finger is lifted and a new slot 1 finger touches
753 * within one reporting interval.
754 *
755 * Case (b) happens if initially two or more fingers tap
756 * briefly, and all but one lift before the end of the first
757 * reporting interval.
758 *
759 * (In both these cases, slot 0 will becomes empty, so SGM
760 * contains slot 1 with the new finger)
761 *
762 * Else, if there was no previous SGM, it now contains slot 0.
763 *
764 * Otherwise, SGM still contains the same slot.
765 */
766 if (priv->mt_state_lost ||
767 (priv->agm_pending && old->sgm <= 0))
768 synaptics_mt_state_set(mt_state, 1, 1, -1);
769 else if (old->sgm == -1)
770 synaptics_mt_state_set(mt_state, 1, 0, -1);
771 break;
772 case 2:
773 /*
774 * If mt_state_lost, we don't know which finger SGM contains.
775 *
776 * So, report 1 finger, but with both slots empty.
777 * We will use slot 1 on subsequent 1->1
778 */
779 if (priv->mt_state_lost) {
780 synaptics_mt_state_set(mt_state, 1, -1, -1);
781 break;
782 }
783 /*
784 * Since the last AGM was NOT (0,0,0), it was the finger in
785 * slot 0 that has been removed.
786 * So, SGM now contains previous AGM's slot, and AGM is now
787 * empty.
788 */
789 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
790 break;
791 case 3:
792 /*
793 * Since last AGM was not (0,0,0), we don't know which finger
794 * is left.
795 *
796 * So, report 1 finger, but with both slots empty.
797 * We will use slot 1 on subsequent 1->1
798 */
799 synaptics_mt_state_set(mt_state, 1, -1, -1);
800 priv->mt_state_lost = true;
801 break;
802 case 4:
803 case 5:
804 /* mt_state was updated by AGM-CONTACT packet */
805 break;
806 }
807}
808
809/* Handle case where mt_state->count = 2 */
810static void synaptics_image_sensor_2f(struct synaptics_data *priv,
811 struct synaptics_mt_state *mt_state)
812{
813 struct synaptics_mt_state *old = &priv->mt_state;
814
815 switch (old->count) {
816 case 0:
817 synaptics_mt_state_set(mt_state, 2, 0, 1);
818 break;
819 case 1:
820 /*
821 * If previous SGM contained slot 1 or higher, SGM now contains
822 * slot 0 (the newly touching finger) and AGM contains SGM's
823 * previous slot.
824 *
825 * Otherwise, SGM still contains slot 0 and AGM now contains
826 * slot 1.
827 */
828 if (old->sgm >= 1)
829 synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
830 else
831 synaptics_mt_state_set(mt_state, 2, 0, 1);
832 break;
833 case 2:
834 /*
835 * If mt_state_lost, SGM now contains either finger 1 or 2, but
836 * we don't know which.
837 * So, we just assume that the SGM contains slot 0 and AGM 1.
838 */
839 if (priv->mt_state_lost)
840 synaptics_mt_state_set(mt_state, 2, 0, 1);
841 /*
842 * Otherwise, use the same mt_state, since it either hasn't
843 * changed, or was updated by a recently received AGM-CONTACT
844 * packet.
845 */
846 break;
847 case 3:
848 /*
849 * 3->2 transitions have two unsolvable problems:
850 * 1) no indication is given which finger was removed
851 * 2) no way to tell if agm packet was for finger 3
852 * before 3->2, or finger 2 after 3->2.
853 *
854 * So, report 2 fingers, but empty all slots.
855 * We will guess slots [0,1] on subsequent 2->2.
856 */
857 synaptics_mt_state_set(mt_state, 2, -1, -1);
858 priv->mt_state_lost = true;
859 break;
860 case 4:
861 case 5:
862 /* mt_state was updated by AGM-CONTACT packet */
863 break;
864 }
865}
866
867/* Handle case where mt_state->count = 3 */
868static void synaptics_image_sensor_3f(struct synaptics_data *priv,
869 struct synaptics_mt_state *mt_state)
870{
871 struct synaptics_mt_state *old = &priv->mt_state;
872
873 switch (old->count) {
874 case 0:
875 synaptics_mt_state_set(mt_state, 3, 0, 2);
876 break;
877 case 1:
878 /*
879 * If previous SGM contained slot 2 or higher, SGM now contains
880 * slot 0 (one of the newly touching fingers) and AGM contains
881 * SGM's previous slot.
882 *
883 * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
884 */
885 if (old->sgm >= 2)
886 synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
887 else
888 synaptics_mt_state_set(mt_state, 3, 0, 2);
889 break;
890 case 2:
891 /*
892 * If the AGM previously contained slot 3 or higher, then the
893 * newly touching finger is in the lowest available slot.
894 *
895 * If SGM was previously 1 or higher, then the new SGM is
896 * now slot 0 (with a new finger), otherwise, the new finger
897 * is now in a hidden slot between 0 and AGM's slot.
898 *
899 * In all such cases, the SGM now contains slot 0, and the AGM
900 * continues to contain the same slot as before.
901 */
902 if (old->agm >= 3) {
903 synaptics_mt_state_set(mt_state, 3, 0, old->agm);
904 break;
905 }
906
907 /*
908 * After some 3->1 and all 3->2 transitions, we lose track
909 * of which slot is reported by SGM and AGM.
910 *
911 * For 2->3 in this state, report 3 fingers, but empty all
912 * slots, and we will guess (0,2) on a subsequent 0->3.
913 *
914 * To userspace, the resulting transition will look like:
915 * 2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
916 */
917 if (priv->mt_state_lost) {
918 synaptics_mt_state_set(mt_state, 3, -1, -1);
919 break;
920 }
921
922 /*
923 * If the (SGM,AGM) really previously contained slots (0, 1),
924 * then we cannot know what slot was just reported by the AGM,
925 * because the 2->3 transition can occur either before or after
926 * the AGM packet. Thus, this most recent AGM could contain
927 * either the same old slot 1 or the new slot 2.
928 * Subsequent AGMs will be reporting slot 2.
929 *
930 * To userspace, the resulting transition will look like:
931 * 2:[0,1] -> 3:[0,-1] -> 3:[0,2]
932 */
933 synaptics_mt_state_set(mt_state, 3, 0, -1);
934 break;
935 case 3:
936 /*
937 * If, for whatever reason, the previous agm was invalid,
938 * Assume SGM now contains slot 0, AGM now contains slot 2.
939 */
940 if (old->agm <= 2)
941 synaptics_mt_state_set(mt_state, 3, 0, 2);
942 /*
943 * mt_state either hasn't changed, or was updated by a recently
944 * received AGM-CONTACT packet.
945 */
946 break;
947
948 case 4:
949 case 5:
950 /* mt_state was updated by AGM-CONTACT packet */
951 break;
952 }
953}
954
955/* Handle case where mt_state->count = 4, or = 5 */
956static void synaptics_image_sensor_45f(struct synaptics_data *priv,
957 struct synaptics_mt_state *mt_state)
958{
959 /* mt_state was updated correctly by AGM-CONTACT packet */
960 priv->mt_state_lost = false;
961}
962
963static void synaptics_image_sensor_process(struct psmouse *psmouse,
964 struct synaptics_hw_state *sgm)
965{
966 struct synaptics_data *priv = psmouse->private;
967 struct synaptics_hw_state *agm = &priv->agm;
968 struct synaptics_mt_state mt_state;
969
970 /* Initialize using current mt_state (as updated by last agm) */
971 mt_state = agm->mt_state;
972
973 /*
974 * Update mt_state using the new finger count and current mt_state.
975 */
976 if (sgm->z == 0)
977 synaptics_image_sensor_0f(priv, &mt_state);
978 else if (sgm->w >= 4)
979 synaptics_image_sensor_1f(priv, &mt_state);
980 else if (sgm->w == 0)
981 synaptics_image_sensor_2f(priv, &mt_state);
982 else if (sgm->w == 1 && mt_state.count <= 3)
983 synaptics_image_sensor_3f(priv, &mt_state);
984 else
985 synaptics_image_sensor_45f(priv, &mt_state);
986
987 /* Send resulting input events to user space */
988 synaptics_report_mt_data(psmouse, &mt_state, sgm);
989
990 /* Store updated mt_state */
991 priv->mt_state = agm->mt_state = mt_state;
992 priv->agm_pending = false;
993}
994
995/*
996 * called for each full received packet from the touchpad
997 */
998static void synaptics_process_packet(struct psmouse *psmouse)
999{
1000 struct input_dev *dev = psmouse->dev;
1001 struct synaptics_data *priv = psmouse->private;
1002 struct synaptics_hw_state hw;
1003 int num_fingers;
1004 int finger_width;
1005
1006 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1007 return;
1008
1009 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1010 synaptics_image_sensor_process(psmouse, &hw);
1011 return;
1012 }
1013
1014 if (hw.scroll) {
1015 priv->scroll += hw.scroll;
1016
1017 while (priv->scroll >= 4) {
1018 input_report_key(dev, BTN_BACK, !hw.down);
1019 input_sync(dev);
1020 input_report_key(dev, BTN_BACK, hw.down);
1021 input_sync(dev);
1022 priv->scroll -= 4;
1023 }
1024 while (priv->scroll <= -4) {
1025 input_report_key(dev, BTN_FORWARD, !hw.up);
1026 input_sync(dev);
1027 input_report_key(dev, BTN_FORWARD, hw.up);
1028 input_sync(dev);
1029 priv->scroll += 4;
1030 }
1031 return;
1032 }
1033
1034 if (hw.z > 0 && hw.x > 1) {
1035 num_fingers = 1;
1036 finger_width = 5;
1037 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1038 switch (hw.w) {
1039 case 0 ... 1:
1040 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1041 num_fingers = hw.w + 2;
1042 break;
1043 case 2:
1044 if (SYN_MODEL_PEN(priv->model_id))
1045 ; /* Nothing, treat a pen as a single finger */
1046 break;
1047 case 4 ... 15:
1048 if (SYN_CAP_PALMDETECT(priv->capabilities))
1049 finger_width = hw.w;
1050 break;
1051 }
1052 }
1053 } else {
1054 num_fingers = 0;
1055 finger_width = 0;
1056 }
1057
1058 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1059 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1060 num_fingers);
1061
1062 /* Post events
1063 * BTN_TOUCH has to be first as mousedev relies on it when doing
1064 * absolute -> relative conversion
1065 */
1066 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1067 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1068
1069 if (num_fingers > 0) {
1070 input_report_abs(dev, ABS_X, hw.x);
1071 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1072 }
1073 input_report_abs(dev, ABS_PRESSURE, hw.z);
1074
1075 if (SYN_CAP_PALMDETECT(priv->capabilities))
1076 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1077
1078 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1079 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1080 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1081 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1082 }
1083
1084 synaptics_report_buttons(psmouse, &hw);
1085
1086 input_sync(dev);
1087}
1088
1089static int synaptics_validate_byte(struct psmouse *psmouse,
1090 int idx, unsigned char pkt_type)
1091{
1092 static const unsigned char newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1093 static const unsigned char newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1094 static const unsigned char newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1095 static const unsigned char oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1096 static const unsigned char oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1097 const char *packet = psmouse->packet;
1098
1099 if (idx < 0 || idx > 4)
1100 return 0;
1101
1102 switch (pkt_type) {
1103
1104 case SYN_NEWABS:
1105 case SYN_NEWABS_RELAXED:
1106 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1107
1108 case SYN_NEWABS_STRICT:
1109 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1110
1111 case SYN_OLDABS:
1112 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1113
1114 default:
1115 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1116 return 0;
1117 }
1118}
1119
1120static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1121{
1122 int i;
1123
1124 for (i = 0; i < 5; i++)
1125 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1126 psmouse_info(psmouse, "using relaxed packet validation\n");
1127 return SYN_NEWABS_RELAXED;
1128 }
1129
1130 return SYN_NEWABS_STRICT;
1131}
1132
1133static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1134{
1135 struct synaptics_data *priv = psmouse->private;
1136
1137 if (psmouse->pktcnt >= 6) { /* Full packet received */
1138 if (unlikely(priv->pkt_type == SYN_NEWABS))
1139 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1140
1141 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1142 synaptics_is_pt_packet(psmouse->packet)) {
1143 if (priv->pt_port)
1144 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1145 } else
1146 synaptics_process_packet(psmouse);
1147
1148 return PSMOUSE_FULL_PACKET;
1149 }
1150
1151 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1152 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1153}
1154
1155/*****************************************************************************
1156 * Driver initialization/cleanup functions
1157 ****************************************************************************/
1158static void set_abs_position_params(struct input_dev *dev,
1159 struct synaptics_data *priv, int x_code,
1160 int y_code)
1161{
1162 int x_min = priv->x_min ?: XMIN_NOMINAL;
1163 int x_max = priv->x_max ?: XMAX_NOMINAL;
1164 int y_min = priv->y_min ?: YMIN_NOMINAL;
1165 int y_max = priv->y_max ?: YMAX_NOMINAL;
1166 int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1167 SYN_REDUCED_FILTER_FUZZ : 0;
1168
1169 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1170 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1171 input_abs_set_res(dev, x_code, priv->x_res);
1172 input_abs_set_res(dev, y_code, priv->y_res);
1173}
1174
1175static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
1176{
1177 int i;
1178
1179 /* Things that apply to both modes */
1180 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1181 __set_bit(EV_KEY, dev->evbit);
1182 __set_bit(BTN_LEFT, dev->keybit);
1183 __set_bit(BTN_RIGHT, dev->keybit);
1184
1185 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1186 __set_bit(BTN_MIDDLE, dev->keybit);
1187
1188 if (!priv->absolute_mode) {
1189 /* Relative mode */
1190 __set_bit(EV_REL, dev->evbit);
1191 __set_bit(REL_X, dev->relbit);
1192 __set_bit(REL_Y, dev->relbit);
1193 return;
1194 }
1195
1196 /* Absolute mode */
1197 __set_bit(EV_ABS, dev->evbit);
1198 set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1199 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1200
1201 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1202 input_mt_init_slots(dev, 2);
1203 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1204 ABS_MT_POSITION_Y);
1205 /* Image sensors can report per-contact pressure */
1206 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1207
1208 /* Image sensors can signal 4 and 5 finger clicks */
1209 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1210 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1211 } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1212 /* Non-image sensors with AGM use semi-mt */
1213 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1214 input_mt_init_slots(dev, 2);
1215 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1216 ABS_MT_POSITION_Y);
1217 }
1218
1219 if (SYN_CAP_PALMDETECT(priv->capabilities))
1220 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1221
1222 __set_bit(BTN_TOUCH, dev->keybit);
1223 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1224
1225 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1226 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1227 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1228 }
1229
1230 if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1231 SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1232 __set_bit(BTN_FORWARD, dev->keybit);
1233 __set_bit(BTN_BACK, dev->keybit);
1234 }
1235
1236 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1237 __set_bit(BTN_0 + i, dev->keybit);
1238
1239 __clear_bit(EV_REL, dev->evbit);
1240 __clear_bit(REL_X, dev->relbit);
1241 __clear_bit(REL_Y, dev->relbit);
1242
1243 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1244 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1245 /* Clickpads report only left button */
1246 __clear_bit(BTN_RIGHT, dev->keybit);
1247 __clear_bit(BTN_MIDDLE, dev->keybit);
1248 }
1249}
1250
1251static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1252 void *data, char *buf)
1253{
1254 struct synaptics_data *priv = psmouse->private;
1255
1256 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1257}
1258
1259static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1260 void *data, const char *buf,
1261 size_t len)
1262{
1263 struct synaptics_data *priv = psmouse->private;
1264 unsigned int value;
1265 int err;
1266
1267 err = kstrtouint(buf, 10, &value);
1268 if (err)
1269 return err;
1270
1271 if (value > 1)
1272 return -EINVAL;
1273
1274 if (value == priv->disable_gesture)
1275 return len;
1276
1277 priv->disable_gesture = value;
1278 if (value)
1279 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1280 else
1281 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1282
1283 if (synaptics_mode_cmd(psmouse, priv->mode))
1284 return -EIO;
1285
1286 return len;
1287}
1288
1289PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1290 synaptics_show_disable_gesture,
1291 synaptics_set_disable_gesture);
1292
1293static void synaptics_disconnect(struct psmouse *psmouse)
1294{
1295 struct synaptics_data *priv = psmouse->private;
1296
1297 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1298 device_remove_file(&psmouse->ps2dev.serio->dev,
1299 &psmouse_attr_disable_gesture.dattr);
1300
1301 synaptics_reset(psmouse);
1302 kfree(priv);
1303 psmouse->private = NULL;
1304}
1305
1306static int synaptics_reconnect(struct psmouse *psmouse)
1307{
1308 struct synaptics_data *priv = psmouse->private;
1309 struct synaptics_data old_priv = *priv;
1310 int retry = 0;
1311 int error;
1312
1313 do {
1314 psmouse_reset(psmouse);
1315 if (retry) {
1316 /*
1317 * On some boxes, right after resuming, the touchpad
1318 * needs some time to finish initializing (I assume
1319 * it needs time to calibrate) and start responding
1320 * to Synaptics-specific queries, so let's wait a
1321 * bit.
1322 */
1323 ssleep(1);
1324 }
1325 error = synaptics_detect(psmouse, 0);
1326 } while (error && ++retry < 3);
1327
1328 if (error)
1329 return -1;
1330
1331 if (retry > 1)
1332 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1333
1334 if (synaptics_query_hardware(psmouse)) {
1335 psmouse_err(psmouse, "Unable to query device.\n");
1336 return -1;
1337 }
1338
1339 if (synaptics_set_mode(psmouse)) {
1340 psmouse_err(psmouse, "Unable to initialize device.\n");
1341 return -1;
1342 }
1343
1344 if (old_priv.identity != priv->identity ||
1345 old_priv.model_id != priv->model_id ||
1346 old_priv.capabilities != priv->capabilities ||
1347 old_priv.ext_cap != priv->ext_cap) {
1348 psmouse_err(psmouse,
1349 "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1350 old_priv.identity, priv->identity,
1351 old_priv.model_id, priv->model_id,
1352 old_priv.capabilities, priv->capabilities,
1353 old_priv.ext_cap, priv->ext_cap);
1354 return -1;
1355 }
1356
1357 return 0;
1358}
1359
1360static bool impaired_toshiba_kbc;
1361
1362static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
1363#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1364 {
1365 /* Toshiba Satellite */
1366 .matches = {
1367 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1368 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1369 },
1370 },
1371 {
1372 /* Toshiba Dynabook */
1373 .matches = {
1374 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1375 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1376 },
1377 },
1378 {
1379 /* Toshiba Portege M300 */
1380 .matches = {
1381 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1382 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1383 },
1384
1385 },
1386 {
1387 /* Toshiba Portege M300 */
1388 .matches = {
1389 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1390 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1391 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1392 },
1393
1394 },
1395#endif
1396 { }
1397};
1398
1399static bool broken_olpc_ec;
1400
1401static const struct dmi_system_id __initconst olpc_dmi_table[] = {
1402#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1403 {
1404 /* OLPC XO-1 or XO-1.5 */
1405 .matches = {
1406 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1407 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1408 },
1409 },
1410#endif
1411 { }
1412};
1413
1414void __init synaptics_module_init(void)
1415{
1416 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1417 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1418}
1419
1420static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1421{
1422 struct synaptics_data *priv;
1423 int err = -1;
1424
1425 /*
1426 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1427 * packet spew overloads the EC such that key presses on the keyboard
1428 * are missed. Given that, don't even attempt to use Absolute mode.
1429 * Relative mode seems to work just fine.
1430 */
1431 if (absolute_mode && broken_olpc_ec) {
1432 psmouse_info(psmouse,
1433 "OLPC XO detected, not enabling Synaptics protocol.\n");
1434 return -ENODEV;
1435 }
1436
1437 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1438 if (!priv)
1439 return -ENOMEM;
1440
1441 psmouse_reset(psmouse);
1442
1443 if (synaptics_query_hardware(psmouse)) {
1444 psmouse_err(psmouse, "Unable to query device.\n");
1445 goto init_fail;
1446 }
1447
1448 priv->absolute_mode = absolute_mode;
1449 if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1450 priv->disable_gesture = true;
1451
1452 if (synaptics_set_mode(psmouse)) {
1453 psmouse_err(psmouse, "Unable to initialize device.\n");
1454 goto init_fail;
1455 }
1456
1457 priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1458
1459 psmouse_info(psmouse,
1460 "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
1461 SYN_ID_MODEL(priv->identity),
1462 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1463 priv->model_id,
1464 priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
1465
1466 set_input_params(psmouse->dev, priv);
1467
1468 /*
1469 * Encode touchpad model so that it can be used to set
1470 * input device->id.version and be visible to userspace.
1471 * Because version is __u16 we have to drop something.
1472 * Hardware info bits seem to be good candidates as they
1473 * are documented to be for Synaptics corp. internal use.
1474 */
1475 psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1476 (priv->model_id & 0x000000ff);
1477
1478 if (absolute_mode) {
1479 psmouse->protocol_handler = synaptics_process_byte;
1480 psmouse->pktsize = 6;
1481 } else {
1482 /* Relative mode follows standard PS/2 mouse protocol */
1483 psmouse->protocol_handler = psmouse_process_byte;
1484 psmouse->pktsize = 3;
1485 }
1486
1487 psmouse->set_rate = synaptics_set_rate;
1488 psmouse->disconnect = synaptics_disconnect;
1489 psmouse->reconnect = synaptics_reconnect;
1490 psmouse->cleanup = synaptics_reset;
1491 /* Synaptics can usually stay in sync without extra help */
1492 psmouse->resync_time = 0;
1493
1494 if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1495 synaptics_pt_create(psmouse);
1496
1497 /*
1498 * Toshiba's KBC seems to have trouble handling data from
1499 * Synaptics at full rate. Switch to a lower rate (roughly
1500 * the same rate as a standard PS/2 mouse).
1501 */
1502 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1503 psmouse_info(psmouse,
1504 "Toshiba %s detected, limiting rate to 40pps.\n",
1505 dmi_get_system_info(DMI_PRODUCT_NAME));
1506 psmouse->rate = 40;
1507 }
1508
1509 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1510 err = device_create_file(&psmouse->ps2dev.serio->dev,
1511 &psmouse_attr_disable_gesture.dattr);
1512 if (err) {
1513 psmouse_err(psmouse,
1514 "Failed to create disable_gesture attribute (%d)",
1515 err);
1516 goto init_fail;
1517 }
1518 }
1519
1520 return 0;
1521
1522 init_fail:
1523 kfree(priv);
1524 return err;
1525}
1526
1527int synaptics_init(struct psmouse *psmouse)
1528{
1529 return __synaptics_init(psmouse, true);
1530}
1531
1532int synaptics_init_relative(struct psmouse *psmouse)
1533{
1534 return __synaptics_init(psmouse, false);
1535}
1536
1537bool synaptics_supported(void)
1538{
1539 return true;
1540}
1541
1542#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1543
1544void __init synaptics_module_init(void)
1545{
1546}
1547
1548int synaptics_init(struct psmouse *psmouse)
1549{
1550 return -ENOSYS;
1551}
1552
1553bool synaptics_supported(void)
1554{
1555 return false;
1556}
1557
1558#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */