]> git.ipfire.org Git - thirdparty/linux.git/blob - drivers/input/mouse/synaptics.c
projects / thirdparty / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'x86-fpu-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
[thirdparty/linux.git] / drivers / input / mouse / synaptics.c
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 */
79 static 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
96 int 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
118 void 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. */
128 static const char * const topbuttonpad_pnp_ids[] = {
129 "LEN0017",
130 "LEN0018",
131 "LEN0019",
132 "LEN0023",
133 "LEN002A",
134 "LEN002B",
135 "LEN002C",
136 "LEN002D",
137 "LEN002E",
138 "LEN0033", /* Helix */
139 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
140 "LEN0035", /* X240 */
141 "LEN0036", /* T440 */
142 "LEN0037", /* X1 Carbon 2nd */
143 "LEN0038",
144 "LEN0039", /* T440s */
145 "LEN0041",
146 "LEN0042", /* Yoga */
147 "LEN0045",
148 "LEN0047",
149 "LEN2000", /* S540 */
150 "LEN2001", /* Edge E431 */
151 "LEN2002", /* Edge E531 */
152 "LEN2003",
153 "LEN2004", /* L440 */
154 "LEN2005",
155 "LEN2006", /* Edge E440/E540 */
156 "LEN2007",
157 "LEN2008",
158 "LEN2009",
159 "LEN200A",
160 "LEN200B",
161 NULL
162 };
163
164 static 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 "LEN009b", /* T580 */
183 "LEN200f", /* T450s */
184 "LEN2044", /* L470 */
185 "LEN2054", /* E480 */
186 "LEN2055", /* E580 */
187 "SYN3052", /* HP EliteBook 840 G4 */
188 "SYN3221", /* HP 15-ay000 */
189 "SYN323d", /* HP Spectre X360 13-w013dx */
190 "SYN3257", /* HP Envy 13-ad105ng */
191 NULL
192 };
193
194 static const char * const forcepad_pnp_ids[] = {
195 "SYN300D",
196 "SYN3014",
197 NULL
198 };
199
200 /*
201 * Send a command to the synaptics touchpad by special commands
202 */
203 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
204 {
205 int error;
206
207 error = ps2_sliced_command(&psmouse->ps2dev, cmd);
208 if (error)
209 return error;
210
211 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
212 if (error)
213 return error;
214
215 return 0;
216 }
217
218 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
219 {
220 int error;
221 union {
222 __be32 be_val;
223 char buf[4];
224 } resp = { 0 };
225
226 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
227 if (error)
228 return error;
229
230 *val = be32_to_cpu(resp.be_val);
231 return 0;
232 }
233
234 /*
235 * Identify Touchpad
236 * See also the SYN_ID_* macros
237 */
238 static int synaptics_identify(struct psmouse *psmouse,
239 struct synaptics_device_info *info)
240 {
241 int error;
242
243 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
244 if (error)
245 return error;
246
247 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
248 }
249
250 /*
251 * Read the model-id bytes from the touchpad
252 * see also SYN_MODEL_* macros
253 */
254 static int synaptics_model_id(struct psmouse *psmouse,
255 struct synaptics_device_info *info)
256 {
257 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
258 }
259
260 /*
261 * Read the firmware id from the touchpad
262 */
263 static int synaptics_firmware_id(struct psmouse *psmouse,
264 struct synaptics_device_info *info)
265 {
266 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
267 &info->firmware_id);
268 }
269
270 /*
271 * Read the board id and the "More Extended Queries" from the touchpad
272 * The board id is encoded in the "QUERY MODES" response
273 */
274 static int synaptics_query_modes(struct psmouse *psmouse,
275 struct synaptics_device_info *info)
276 {
277 u8 bid[3];
278 int error;
279
280 /* firmwares prior 7.5 have no board_id encoded */
281 if (SYN_ID_FULL(info->identity) < 0x705)
282 return 0;
283
284 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
285 if (error)
286 return error;
287
288 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
289
290 if (SYN_MEXT_CAP_BIT(bid[0]))
291 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
292 &info->ext_cap_10);
293
294 return 0;
295 }
296
297 /*
298 * Read the capability-bits from the touchpad
299 * see also the SYN_CAP_* macros
300 */
301 static int synaptics_capability(struct psmouse *psmouse,
302 struct synaptics_device_info *info)
303 {
304 int error;
305
306 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
307 &info->capabilities);
308 if (error)
309 return error;
310
311 info->ext_cap = info->ext_cap_0c = 0;
312
313 /*
314 * Older firmwares had submodel ID fixed to 0x47
315 */
316 if (SYN_ID_FULL(info->identity) < 0x705 &&
317 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
318 return -ENXIO;
319 }
320
321 /*
322 * Unless capExtended is set the rest of the flags should be ignored
323 */
324 if (!SYN_CAP_EXTENDED(info->capabilities))
325 info->capabilities = 0;
326
327 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
328 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
329 &info->ext_cap);
330 if (error) {
331 psmouse_warn(psmouse,
332 "device claims to have extended capabilities, but I'm not able to read them.\n");
333 } else {
334 /*
335 * if nExtBtn is greater than 8 it should be considered
336 * invalid and treated as 0
337 */
338 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
339 info->ext_cap &= ~SYN_CAP_MB_MASK;
340 }
341 }
342
343 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
344 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
345 &info->ext_cap_0c);
346 if (error)
347 psmouse_warn(psmouse,
348 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
349 }
350
351 return 0;
352 }
353
354 /*
355 * Read touchpad resolution and maximum reported coordinates
356 * Resolution is left zero if touchpad does not support the query
357 */
358 static int synaptics_resolution(struct psmouse *psmouse,
359 struct synaptics_device_info *info)
360 {
361 u8 resp[3];
362 int error;
363
364 if (SYN_ID_MAJOR(info->identity) < 4)
365 return 0;
366
367 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
368 if (!error) {
369 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
370 info->x_res = resp[0]; /* x resolution in units/mm */
371 info->y_res = resp[2]; /* y resolution in units/mm */
372 }
373 }
374
375 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
376 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
377 error = synaptics_send_cmd(psmouse,
378 SYN_QUE_EXT_MAX_COORDS, resp);
379 if (error) {
380 psmouse_warn(psmouse,
381 "device claims to have max coordinates query, but I'm not able to read it.\n");
382 } else {
383 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
384 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
385 psmouse_info(psmouse,
386 "queried max coordinates: x [..%d], y [..%d]\n",
387 info->x_max, info->y_max);
388 }
389 }
390
391 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
392 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
393 /*
394 * Firmware v8.1 does not report proper number of extended
395 * capabilities, but has been proven to report correct min
396 * coordinates.
397 */
398 SYN_ID_FULL(info->identity) == 0x801)) {
399 error = synaptics_send_cmd(psmouse,
400 SYN_QUE_EXT_MIN_COORDS, resp);
401 if (error) {
402 psmouse_warn(psmouse,
403 "device claims to have min coordinates query, but I'm not able to read it.\n");
404 } else {
405 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
406 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
407 psmouse_info(psmouse,
408 "queried min coordinates: x [%d..], y [%d..]\n",
409 info->x_min, info->y_min);
410 }
411 }
412
413 return 0;
414 }
415
416 static int synaptics_query_hardware(struct psmouse *psmouse,
417 struct synaptics_device_info *info)
418 {
419 int error;
420
421 memset(info, 0, sizeof(*info));
422
423 error = synaptics_identify(psmouse, info);
424 if (error)
425 return error;
426
427 error = synaptics_model_id(psmouse, info);
428 if (error)
429 return error;
430
431 error = synaptics_firmware_id(psmouse, info);
432 if (error)
433 return error;
434
435 error = synaptics_query_modes(psmouse, info);
436 if (error)
437 return error;
438
439 error = synaptics_capability(psmouse, info);
440 if (error)
441 return error;
442
443 error = synaptics_resolution(psmouse, info);
444 if (error)
445 return error;
446
447 return 0;
448 }
449
450 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
451
452 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
453
454 static bool cr48_profile_sensor;
455
456 #define ANY_BOARD_ID 0
457 struct min_max_quirk {
458 const char * const *pnp_ids;
459 struct {
460 u32 min, max;
461 } board_id;
462 u32 x_min, x_max, y_min, y_max;
463 };
464
465 static const struct min_max_quirk min_max_pnpid_table[] = {
466 {
467 (const char * const []){"LEN0033", NULL},
468 {ANY_BOARD_ID, ANY_BOARD_ID},
469 1024, 5052, 2258, 4832
470 },
471 {
472 (const char * const []){"LEN0042", NULL},
473 {ANY_BOARD_ID, ANY_BOARD_ID},
474 1232, 5710, 1156, 4696
475 },
476 {
477 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
478 "LEN0039", "LEN2002", "LEN2004",
479 NULL},
480 {ANY_BOARD_ID, 2961},
481 1024, 5112, 2024, 4832
482 },
483 {
484 (const char * const []){"LEN2000", NULL},
485 {ANY_BOARD_ID, ANY_BOARD_ID},
486 1024, 5113, 2021, 4832
487 },
488 {
489 (const char * const []){"LEN2001", NULL},
490 {ANY_BOARD_ID, ANY_BOARD_ID},
491 1024, 5022, 2508, 4832
492 },
493 {
494 (const char * const []){"LEN2006", NULL},
495 {2691, 2691},
496 1024, 5045, 2457, 4832
497 },
498 {
499 (const char * const []){"LEN2006", NULL},
500 {ANY_BOARD_ID, ANY_BOARD_ID},
501 1264, 5675, 1171, 4688
502 },
503 { }
504 };
505
506 /*****************************************************************************
507 * Synaptics communications functions
508 ****************************************************************************/
509
510 /*
511 * Synaptics touchpads report the y coordinate from bottom to top, which is
512 * opposite from what userspace expects.
513 * This function is used to invert y before reporting.
514 */
515 static int synaptics_invert_y(int y)
516 {
517 return YMAX_NOMINAL + YMIN_NOMINAL - y;
518 }
519
520 /*
521 * Apply quirk(s) if the hardware matches
522 */
523 static void synaptics_apply_quirks(struct psmouse *psmouse,
524 struct synaptics_device_info *info)
525 {
526 int i;
527
528 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
529 if (!psmouse_matches_pnp_id(psmouse,
530 min_max_pnpid_table[i].pnp_ids))
531 continue;
532
533 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
534 info->board_id < min_max_pnpid_table[i].board_id.min)
535 continue;
536
537 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
538 info->board_id > min_max_pnpid_table[i].board_id.max)
539 continue;
540
541 info->x_min = min_max_pnpid_table[i].x_min;
542 info->x_max = min_max_pnpid_table[i].x_max;
543 info->y_min = min_max_pnpid_table[i].y_min;
544 info->y_max = min_max_pnpid_table[i].y_max;
545 psmouse_info(psmouse,
546 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
547 info->x_min, info->x_max,
548 info->y_min, info->y_max);
549 break;
550 }
551 }
552
553 static bool synaptics_has_agm(struct synaptics_data *priv)
554 {
555 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
556 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
557 }
558
559 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
560 {
561 static u8 param = 0xc8;
562 int error;
563
564 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
565 if (error)
566 return error;
567
568 error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
569 if (error)
570 return error;
571
572 return 0;
573 }
574
575 static int synaptics_set_mode(struct psmouse *psmouse)
576 {
577 struct synaptics_data *priv = psmouse->private;
578 int error;
579
580 priv->mode = 0;
581 if (priv->absolute_mode)
582 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
583 if (priv->disable_gesture)
584 priv->mode |= SYN_BIT_DISABLE_GESTURE;
585 if (psmouse->rate >= 80)
586 priv->mode |= SYN_BIT_HIGH_RATE;
587 if (SYN_CAP_EXTENDED(priv->info.capabilities))
588 priv->mode |= SYN_BIT_W_MODE;
589
590 error = synaptics_mode_cmd(psmouse, priv->mode);
591 if (error)
592 return error;
593
594 if (priv->absolute_mode && synaptics_has_agm(priv)) {
595 error = synaptics_set_advanced_gesture_mode(psmouse);
596 if (error) {
597 psmouse_err(psmouse,
598 "Advanced gesture mode init failed: %d\n",
599 error);
600 return error;
601 }
602 }
603
604 return 0;
605 }
606
607 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
608 {
609 struct synaptics_data *priv = psmouse->private;
610
611 if (rate >= 80) {
612 priv->mode |= SYN_BIT_HIGH_RATE;
613 psmouse->rate = 80;
614 } else {
615 priv->mode &= ~SYN_BIT_HIGH_RATE;
616 psmouse->rate = 40;
617 }
618
619 synaptics_mode_cmd(psmouse, priv->mode);
620 }
621
622 /*****************************************************************************
623 * Synaptics pass-through PS/2 port support
624 ****************************************************************************/
625 static int synaptics_pt_write(struct serio *serio, u8 c)
626 {
627 struct psmouse *parent = serio_get_drvdata(serio->parent);
628 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
629 int error;
630
631 error = ps2_sliced_command(&parent->ps2dev, c);
632 if (error)
633 return error;
634
635 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
636 if (error)
637 return error;
638
639 return 0;
640 }
641
642 static int synaptics_pt_start(struct serio *serio)
643 {
644 struct psmouse *parent = serio_get_drvdata(serio->parent);
645 struct synaptics_data *priv = parent->private;
646
647 serio_pause_rx(parent->ps2dev.serio);
648 priv->pt_port = serio;
649 serio_continue_rx(parent->ps2dev.serio);
650
651 return 0;
652 }
653
654 static void synaptics_pt_stop(struct serio *serio)
655 {
656 struct psmouse *parent = serio_get_drvdata(serio->parent);
657 struct synaptics_data *priv = parent->private;
658
659 serio_pause_rx(parent->ps2dev.serio);
660 priv->pt_port = NULL;
661 serio_continue_rx(parent->ps2dev.serio);
662 }
663
664 static int synaptics_is_pt_packet(u8 *buf)
665 {
666 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
667 }
668
669 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
670 {
671 struct psmouse *child = serio_get_drvdata(ptport);
672
673 if (child && child->state == PSMOUSE_ACTIVATED) {
674 serio_interrupt(ptport, packet[1], 0);
675 serio_interrupt(ptport, packet[4], 0);
676 serio_interrupt(ptport, packet[5], 0);
677 if (child->pktsize == 4)
678 serio_interrupt(ptport, packet[2], 0);
679 } else {
680 serio_interrupt(ptport, packet[1], 0);
681 }
682 }
683
684 static void synaptics_pt_activate(struct psmouse *psmouse)
685 {
686 struct synaptics_data *priv = psmouse->private;
687 struct psmouse *child = serio_get_drvdata(priv->pt_port);
688
689 /* adjust the touchpad to child's choice of protocol */
690 if (child) {
691 if (child->pktsize == 4)
692 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
693 else
694 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
695
696 if (synaptics_mode_cmd(psmouse, priv->mode))
697 psmouse_warn(psmouse,
698 "failed to switch guest protocol\n");
699 }
700 }
701
702 static void synaptics_pt_create(struct psmouse *psmouse)
703 {
704 struct serio *serio;
705
706 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
707 if (!serio) {
708 psmouse_err(psmouse,
709 "not enough memory for pass-through port\n");
710 return;
711 }
712
713 serio->id.type = SERIO_PS_PSTHRU;
714 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
715 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
716 serio->write = synaptics_pt_write;
717 serio->start = synaptics_pt_start;
718 serio->stop = synaptics_pt_stop;
719 serio->parent = psmouse->ps2dev.serio;
720
721 psmouse->pt_activate = synaptics_pt_activate;
722
723 psmouse_info(psmouse, "serio: %s port at %s\n",
724 serio->name, psmouse->phys);
725 serio_register_port(serio);
726 }
727
728 /*****************************************************************************
729 * Functions to interpret the absolute mode packets
730 ****************************************************************************/
731
732 static void synaptics_parse_agm(const u8 buf[],
733 struct synaptics_data *priv,
734 struct synaptics_hw_state *hw)
735 {
736 struct synaptics_hw_state *agm = &priv->agm;
737 int agm_packet_type;
738
739 agm_packet_type = (buf[5] & 0x30) >> 4;
740 switch (agm_packet_type) {
741 case 1:
742 /* Gesture packet: (x, y, z) half resolution */
743 agm->w = hw->w;
744 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
745 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
746 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
747 break;
748
749 case 2:
750 /* AGM-CONTACT packet: we are only interested in the count */
751 priv->agm_count = buf[1];
752 break;
753
754 default:
755 break;
756 }
757 }
758
759 static void synaptics_parse_ext_buttons(const u8 buf[],
760 struct synaptics_data *priv,
761 struct synaptics_hw_state *hw)
762 {
763 unsigned int ext_bits =
764 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
765 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
766
767 hw->ext_buttons = buf[4] & ext_mask;
768 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
769 }
770
771 static int synaptics_parse_hw_state(const u8 buf[],
772 struct synaptics_data *priv,
773 struct synaptics_hw_state *hw)
774 {
775 memset(hw, 0, sizeof(struct synaptics_hw_state));
776
777 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
778 hw->w = (((buf[0] & 0x30) >> 2) |
779 ((buf[0] & 0x04) >> 1) |
780 ((buf[3] & 0x04) >> 2));
781
782 if (synaptics_has_agm(priv) && hw->w == 2) {
783 synaptics_parse_agm(buf, priv, hw);
784 return 1;
785 }
786
787 hw->x = (((buf[3] & 0x10) << 8) |
788 ((buf[1] & 0x0f) << 8) |
789 buf[4]);
790 hw->y = (((buf[3] & 0x20) << 7) |
791 ((buf[1] & 0xf0) << 4) |
792 buf[5]);
793 hw->z = buf[2];
794
795 hw->left = (buf[0] & 0x01) ? 1 : 0;
796 hw->right = (buf[0] & 0x02) ? 1 : 0;
797
798 if (priv->is_forcepad) {
799 /*
800 * ForcePads, like Clickpads, use middle button
801 * bits to report primary button clicks.
802 * Unfortunately they report primary button not
803 * only when user presses on the pad above certain
804 * threshold, but also when there are more than one
805 * finger on the touchpad, which interferes with
806 * out multi-finger gestures.
807 */
808 if (hw->z == 0) {
809 /* No contacts */
810 priv->press = priv->report_press = false;
811 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
812 /*
813 * Single-finger touch with pressure above
814 * the threshold. If pressure stays long
815 * enough, we'll start reporting primary
816 * button. We rely on the device continuing
817 * sending data even if finger does not
818 * move.
819 */
820 if (!priv->press) {
821 priv->press_start = jiffies;
822 priv->press = true;
823 } else if (time_after(jiffies,
824 priv->press_start +
825 msecs_to_jiffies(50))) {
826 priv->report_press = true;
827 }
828 } else {
829 priv->press = false;
830 }
831
832 hw->left = priv->report_press;
833
834 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
835 /*
836 * Clickpad's button is transmitted as middle button,
837 * however, since it is primary button, we will report
838 * it as BTN_LEFT.
839 */
840 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
841
842 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
843 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
844 if (hw->w == 2)
845 hw->scroll = (s8)buf[1];
846 }
847
848 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
849 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
850 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
851 }
852
853 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
854 ((buf[0] ^ buf[3]) & 0x02)) {
855 synaptics_parse_ext_buttons(buf, priv, hw);
856 }
857 } else {
858 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
859 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
860
861 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
862 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
863
864 hw->left = (buf[0] & 0x01) ? 1 : 0;
865 hw->right = (buf[0] & 0x02) ? 1 : 0;
866 }
867
868 /*
869 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
870 * is used by some firmware to indicate a finger at the edge of
871 * the touchpad whose precise position cannot be determined, so
872 * convert these values to the maximum axis value.
873 */
874 if (hw->x > X_MAX_POSITIVE)
875 hw->x -= 1 << ABS_POS_BITS;
876 else if (hw->x == X_MAX_POSITIVE)
877 hw->x = XMAX;
878
879 if (hw->y > Y_MAX_POSITIVE)
880 hw->y -= 1 << ABS_POS_BITS;
881 else if (hw->y == Y_MAX_POSITIVE)
882 hw->y = YMAX;
883
884 return 0;
885 }
886
887 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
888 bool active, int x, int y)
889 {
890 input_mt_slot(dev, slot);
891 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
892 if (active) {
893 input_report_abs(dev, ABS_MT_POSITION_X, x);
894 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
895 }
896 }
897
898 static void synaptics_report_semi_mt_data(struct input_dev *dev,
899 const struct synaptics_hw_state *a,
900 const struct synaptics_hw_state *b,
901 int num_fingers)
902 {
903 if (num_fingers >= 2) {
904 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
905 min(a->y, b->y));
906 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
907 max(a->y, b->y));
908 } else if (num_fingers == 1) {
909 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
910 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
911 } else {
912 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
913 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
914 }
915 }
916
917 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
918 const struct synaptics_hw_state *hw)
919 {
920 struct input_dev *dev = psmouse->dev;
921 struct synaptics_data *priv = psmouse->private;
922 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
923 int i;
924
925 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
926 return;
927
928 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
929 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
930 SYN_ID_FULL(priv->info.identity) == 0x802) &&
931 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
932 return;
933
934 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
935 for (i = 0; i < ext_bits; i++) {
936 input_report_key(dev, BTN_0 + 2 * i,
937 hw->ext_buttons & BIT(i));
938 input_report_key(dev, BTN_1 + 2 * i,
939 hw->ext_buttons & BIT(i + ext_bits));
940 }
941 return;
942 }
943
944 /*
945 * This generation of touchpads has the trackstick buttons
946 * physically wired to the touchpad. Re-route them through
947 * the pass-through interface.
948 */
949 if (priv->pt_port) {
950 u8 pt_buttons;
951
952 /* The trackstick expects at most 3 buttons */
953 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
954 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
955 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
956
957 serio_interrupt(priv->pt_port,
958 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
959 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
960 }
961 }
962
963 static void synaptics_report_buttons(struct psmouse *psmouse,
964 const struct synaptics_hw_state *hw)
965 {
966 struct input_dev *dev = psmouse->dev;
967 struct synaptics_data *priv = psmouse->private;
968
969 input_report_key(dev, BTN_LEFT, hw->left);
970 input_report_key(dev, BTN_RIGHT, hw->right);
971
972 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
973 input_report_key(dev, BTN_MIDDLE, hw->middle);
974
975 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
976 input_report_key(dev, BTN_FORWARD, hw->up);
977 input_report_key(dev, BTN_BACK, hw->down);
978 }
979
980 synaptics_report_ext_buttons(psmouse, hw);
981 }
982
983 static void synaptics_report_mt_data(struct psmouse *psmouse,
984 const struct synaptics_hw_state *sgm,
985 int num_fingers)
986 {
987 struct input_dev *dev = psmouse->dev;
988 struct synaptics_data *priv = psmouse->private;
989 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
990 struct input_mt_pos pos[2];
991 int slot[2], nsemi, i;
992
993 nsemi = clamp_val(num_fingers, 0, 2);
994
995 for (i = 0; i < nsemi; i++) {
996 pos[i].x = hw[i]->x;
997 pos[i].y = synaptics_invert_y(hw[i]->y);
998 }
999
1000 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1001
1002 for (i = 0; i < nsemi; i++) {
1003 input_mt_slot(dev, slot[i]);
1004 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1005 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1006 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1007 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1008 }
1009
1010 input_mt_drop_unused(dev);
1011
1012 /* Don't use active slot count to generate BTN_TOOL events. */
1013 input_mt_report_pointer_emulation(dev, false);
1014
1015 /* Send the number of fingers reported by touchpad itself. */
1016 input_mt_report_finger_count(dev, num_fingers);
1017
1018 synaptics_report_buttons(psmouse, sgm);
1019
1020 input_sync(dev);
1021 }
1022
1023 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1024 struct synaptics_hw_state *sgm)
1025 {
1026 struct synaptics_data *priv = psmouse->private;
1027 int num_fingers;
1028
1029 /*
1030 * Update mt_state using the new finger count and current mt_state.
1031 */
1032 if (sgm->z == 0)
1033 num_fingers = 0;
1034 else if (sgm->w >= 4)
1035 num_fingers = 1;
1036 else if (sgm->w == 0)
1037 num_fingers = 2;
1038 else if (sgm->w == 1)
1039 num_fingers = priv->agm_count ? priv->agm_count : 3;
1040 else
1041 num_fingers = 4;
1042
1043 /* Send resulting input events to user space */
1044 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1045 }
1046
1047 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1048 {
1049 if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1050 return true;
1051
1052 /* Advanced gesture mode also sends multi finger data */
1053 return synaptics_has_agm(priv);
1054 }
1055
1056 /*
1057 * called for each full received packet from the touchpad
1058 */
1059 static void synaptics_process_packet(struct psmouse *psmouse)
1060 {
1061 struct input_dev *dev = psmouse->dev;
1062 struct synaptics_data *priv = psmouse->private;
1063 struct synaptics_device_info *info = &priv->info;
1064 struct synaptics_hw_state hw;
1065 int num_fingers;
1066 int finger_width;
1067
1068 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1069 return;
1070
1071 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1072 synaptics_image_sensor_process(psmouse, &hw);
1073 return;
1074 }
1075
1076 if (hw.scroll) {
1077 priv->scroll += hw.scroll;
1078
1079 while (priv->scroll >= 4) {
1080 input_report_key(dev, BTN_BACK, !hw.down);
1081 input_sync(dev);
1082 input_report_key(dev, BTN_BACK, hw.down);
1083 input_sync(dev);
1084 priv->scroll -= 4;
1085 }
1086 while (priv->scroll <= -4) {
1087 input_report_key(dev, BTN_FORWARD, !hw.up);
1088 input_sync(dev);
1089 input_report_key(dev, BTN_FORWARD, hw.up);
1090 input_sync(dev);
1091 priv->scroll += 4;
1092 }
1093 return;
1094 }
1095
1096 if (hw.z > 0 && hw.x > 1) {
1097 num_fingers = 1;
1098 finger_width = 5;
1099 if (SYN_CAP_EXTENDED(info->capabilities)) {
1100 switch (hw.w) {
1101 case 0 ... 1:
1102 if (synaptics_has_multifinger(priv))
1103 num_fingers = hw.w + 2;
1104 break;
1105 case 2:
1106 if (SYN_MODEL_PEN(info->model_id))
1107 ; /* Nothing, treat a pen as a single finger */
1108 break;
1109 case 4 ... 15:
1110 if (SYN_CAP_PALMDETECT(info->capabilities))
1111 finger_width = hw.w;
1112 break;
1113 }
1114 }
1115 } else {
1116 num_fingers = 0;
1117 finger_width = 0;
1118 }
1119
1120 if (cr48_profile_sensor) {
1121 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1122 return;
1123 }
1124
1125 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1126 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1127 num_fingers);
1128
1129 /* Post events
1130 * BTN_TOUCH has to be first as mousedev relies on it when doing
1131 * absolute -> relative conversion
1132 */
1133 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1134 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1135
1136 if (num_fingers > 0) {
1137 input_report_abs(dev, ABS_X, hw.x);
1138 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1139 }
1140 input_report_abs(dev, ABS_PRESSURE, hw.z);
1141
1142 if (SYN_CAP_PALMDETECT(info->capabilities))
1143 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1144
1145 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1146 if (synaptics_has_multifinger(priv)) {
1147 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1148 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1149 }
1150
1151 synaptics_report_buttons(psmouse, &hw);
1152
1153 input_sync(dev);
1154 }
1155
1156 static bool synaptics_validate_byte(struct psmouse *psmouse,
1157 int idx, enum synaptics_pkt_type pkt_type)
1158 {
1159 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1160 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1161 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1162 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1163 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1164 const u8 *packet = psmouse->packet;
1165
1166 if (idx < 0 || idx > 4)
1167 return false;
1168
1169 switch (pkt_type) {
1170
1171 case SYN_NEWABS:
1172 case SYN_NEWABS_RELAXED:
1173 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1174
1175 case SYN_NEWABS_STRICT:
1176 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1177
1178 case SYN_OLDABS:
1179 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1180
1181 default:
1182 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1183 return false;
1184 }
1185 }
1186
1187 static enum synaptics_pkt_type
1188 synaptics_detect_pkt_type(struct psmouse *psmouse)
1189 {
1190 int i;
1191
1192 for (i = 0; i < 5; i++) {
1193 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1194 psmouse_info(psmouse, "using relaxed packet validation\n");
1195 return SYN_NEWABS_RELAXED;
1196 }
1197 }
1198
1199 return SYN_NEWABS_STRICT;
1200 }
1201
1202 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1203 {
1204 struct synaptics_data *priv = psmouse->private;
1205
1206 if (psmouse->pktcnt >= 6) { /* Full packet received */
1207 if (unlikely(priv->pkt_type == SYN_NEWABS))
1208 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1209
1210 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1211 synaptics_is_pt_packet(psmouse->packet)) {
1212 if (priv->pt_port)
1213 synaptics_pass_pt_packet(priv->pt_port,
1214 psmouse->packet);
1215 } else
1216 synaptics_process_packet(psmouse);
1217
1218 return PSMOUSE_FULL_PACKET;
1219 }
1220
1221 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1222 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1223 }
1224
1225 /*****************************************************************************
1226 * Driver initialization/cleanup functions
1227 ****************************************************************************/
1228 static void set_abs_position_params(struct input_dev *dev,
1229 struct synaptics_device_info *info,
1230 int x_code, int y_code)
1231 {
1232 int x_min = info->x_min ?: XMIN_NOMINAL;
1233 int x_max = info->x_max ?: XMAX_NOMINAL;
1234 int y_min = info->y_min ?: YMIN_NOMINAL;
1235 int y_max = info->y_max ?: YMAX_NOMINAL;
1236 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1237 SYN_REDUCED_FILTER_FUZZ : 0;
1238
1239 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1240 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1241 input_abs_set_res(dev, x_code, info->x_res);
1242 input_abs_set_res(dev, y_code, info->y_res);
1243 }
1244
1245 static int set_input_params(struct psmouse *psmouse,
1246 struct synaptics_data *priv)
1247 {
1248 struct input_dev *dev = psmouse->dev;
1249 struct synaptics_device_info *info = &priv->info;
1250 int i;
1251 int error;
1252
1253 /* Reset default psmouse capabilities */
1254 __clear_bit(EV_REL, dev->evbit);
1255 bitmap_zero(dev->relbit, REL_CNT);
1256 bitmap_zero(dev->keybit, KEY_CNT);
1257
1258 /* Things that apply to both modes */
1259 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1260
1261 input_set_capability(dev, EV_KEY, BTN_LEFT);
1262
1263 /* Clickpads report only left button */
1264 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1265 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1266 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1267 input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1268 }
1269
1270 if (!priv->absolute_mode) {
1271 /* Relative mode */
1272 input_set_capability(dev, EV_REL, REL_X);
1273 input_set_capability(dev, EV_REL, REL_Y);
1274 return 0;
1275 }
1276
1277 /* Absolute mode */
1278 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1279 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1280
1281 if (cr48_profile_sensor)
1282 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1283
1284 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1285 set_abs_position_params(dev, info,
1286 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1287 /* Image sensors can report per-contact pressure */
1288 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1289
1290 error = input_mt_init_slots(dev, 2,
1291 INPUT_MT_POINTER | INPUT_MT_TRACK);
1292 if (error)
1293 return error;
1294
1295 /* Image sensors can signal 4 and 5 finger clicks */
1296 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1297 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1298 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1299 set_abs_position_params(dev, info,
1300 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1301 /*
1302 * Profile sensor in CR-48 tracks contacts reasonably well,
1303 * other non-image sensors with AGM use semi-mt.
1304 */
1305 error = input_mt_init_slots(dev, 2,
1306 INPUT_MT_POINTER |
1307 (cr48_profile_sensor ?
1308 INPUT_MT_TRACK :
1309 INPUT_MT_SEMI_MT));
1310 if (error)
1311 return error;
1312
1313 /*
1314 * For semi-mt devices we send ABS_X/Y ourselves instead of
1315 * input_mt_report_pointer_emulation. But
1316 * input_mt_init_slots() resets the fuzz to 0, leading to a
1317 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1318 * position. Let's re-initialize ABS_X/Y here.
1319 */
1320 if (!cr48_profile_sensor)
1321 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1322 }
1323
1324 if (SYN_CAP_PALMDETECT(info->capabilities))
1325 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1326
1327 input_set_capability(dev, EV_KEY, BTN_TOUCH);
1328 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1329
1330 if (synaptics_has_multifinger(priv)) {
1331 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1332 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1333 }
1334
1335 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1336 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1337 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1338 input_set_capability(dev, EV_KEY, BTN_BACK);
1339 }
1340
1341 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1342 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1343 input_set_capability(dev, EV_KEY, BTN_0 + i);
1344
1345 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1346 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1347 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1348 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1349 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1350 }
1351
1352 return 0;
1353 }
1354
1355 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1356 void *data, char *buf)
1357 {
1358 struct synaptics_data *priv = psmouse->private;
1359
1360 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1361 }
1362
1363 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1364 void *data, const char *buf,
1365 size_t len)
1366 {
1367 struct synaptics_data *priv = psmouse->private;
1368 unsigned int value;
1369 int err;
1370
1371 err = kstrtouint(buf, 10, &value);
1372 if (err)
1373 return err;
1374
1375 if (value > 1)
1376 return -EINVAL;
1377
1378 if (value == priv->disable_gesture)
1379 return len;
1380
1381 priv->disable_gesture = value;
1382 if (value)
1383 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1384 else
1385 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1386
1387 if (synaptics_mode_cmd(psmouse, priv->mode))
1388 return -EIO;
1389
1390 return len;
1391 }
1392
1393 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1394 synaptics_show_disable_gesture,
1395 synaptics_set_disable_gesture);
1396
1397 static void synaptics_disconnect(struct psmouse *psmouse)
1398 {
1399 struct synaptics_data *priv = psmouse->private;
1400
1401 /*
1402 * We might have left a breadcrumb when trying to
1403 * set up SMbus companion.
1404 */
1405 psmouse_smbus_cleanup(psmouse);
1406
1407 if (!priv->absolute_mode &&
1408 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1409 device_remove_file(&psmouse->ps2dev.serio->dev,
1410 &psmouse_attr_disable_gesture.dattr);
1411
1412 synaptics_reset(psmouse);
1413 kfree(priv);
1414 psmouse->private = NULL;
1415 }
1416
1417 static int synaptics_reconnect(struct psmouse *psmouse)
1418 {
1419 struct synaptics_data *priv = psmouse->private;
1420 struct synaptics_device_info info;
1421 u8 param[2];
1422 int retry = 0;
1423 int error;
1424
1425 do {
1426 psmouse_reset(psmouse);
1427 if (retry) {
1428 /*
1429 * On some boxes, right after resuming, the touchpad
1430 * needs some time to finish initializing (I assume
1431 * it needs time to calibrate) and start responding
1432 * to Synaptics-specific queries, so let's wait a
1433 * bit.
1434 */
1435 ssleep(1);
1436 }
1437 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1438 error = synaptics_detect(psmouse, 0);
1439 } while (error && ++retry < 3);
1440
1441 if (error)
1442 return error;
1443
1444 if (retry > 1)
1445 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1446
1447 error = synaptics_query_hardware(psmouse, &info);
1448 if (error) {
1449 psmouse_err(psmouse, "Unable to query device.\n");
1450 return error;
1451 }
1452
1453 error = synaptics_set_mode(psmouse);
1454 if (error) {
1455 psmouse_err(psmouse, "Unable to initialize device.\n");
1456 return error;
1457 }
1458
1459 if (info.identity != priv->info.identity ||
1460 info.model_id != priv->info.model_id ||
1461 info.capabilities != priv->info.capabilities ||
1462 info.ext_cap != priv->info.ext_cap) {
1463 psmouse_err(psmouse,
1464 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1465 priv->info.identity, info.identity,
1466 priv->info.model_id, info.model_id,
1467 priv->info.capabilities, info.capabilities,
1468 priv->info.ext_cap, info.ext_cap);
1469 return -ENXIO;
1470 }
1471
1472 return 0;
1473 }
1474
1475 static bool impaired_toshiba_kbc;
1476
1477 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1478 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1479 {
1480 /* Toshiba Satellite */
1481 .matches = {
1482 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1483 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1484 },
1485 },
1486 {
1487 /* Toshiba Dynabook */
1488 .matches = {
1489 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1490 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1491 },
1492 },
1493 {
1494 /* Toshiba Portege M300 */
1495 .matches = {
1496 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1497 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1498 },
1499
1500 },
1501 {
1502 /* Toshiba Portege M300 */
1503 .matches = {
1504 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1505 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1506 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1507 },
1508
1509 },
1510 #endif
1511 { }
1512 };
1513
1514 static bool broken_olpc_ec;
1515
1516 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1517 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1518 {
1519 /* OLPC XO-1 or XO-1.5 */
1520 .matches = {
1521 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1522 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1523 },
1524 },
1525 #endif
1526 { }
1527 };
1528
1529 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1530 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1531 {
1532 /* Cr-48 Chromebook (Codename Mario) */
1533 .matches = {
1534 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1535 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1536 },
1537 },
1538 #endif
1539 { }
1540 };
1541
1542 void __init synaptics_module_init(void)
1543 {
1544 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1545 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1546 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1547 }
1548
1549 static int synaptics_init_ps2(struct psmouse *psmouse,
1550 struct synaptics_device_info *info,
1551 bool absolute_mode)
1552 {
1553 struct synaptics_data *priv;
1554 int err;
1555
1556 synaptics_apply_quirks(psmouse, info);
1557
1558 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1559 if (!priv)
1560 return -ENOMEM;
1561
1562 priv->info = *info;
1563 priv->absolute_mode = absolute_mode;
1564 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1565 priv->disable_gesture = true;
1566
1567 /*
1568 * Unfortunately ForcePad capability is not exported over PS/2,
1569 * so we have to resort to checking PNP IDs.
1570 */
1571 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1572
1573 err = synaptics_set_mode(psmouse);
1574 if (err) {
1575 psmouse_err(psmouse, "Unable to initialize device.\n");
1576 goto init_fail;
1577 }
1578
1579 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1580 SYN_NEWABS : SYN_OLDABS;
1581
1582 psmouse_info(psmouse,
1583 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1584 SYN_ID_MODEL(info->identity),
1585 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1586 info->model_id,
1587 info->capabilities, info->ext_cap, info->ext_cap_0c,
1588 info->ext_cap_10, info->board_id, info->firmware_id);
1589
1590 err = set_input_params(psmouse, priv);
1591 if (err) {
1592 psmouse_err(psmouse,
1593 "failed to set up capabilities: %d\n", err);
1594 goto init_fail;
1595 }
1596
1597 /*
1598 * Encode touchpad model so that it can be used to set
1599 * input device->id.version and be visible to userspace.
1600 * Because version is __u16 we have to drop something.
1601 * Hardware info bits seem to be good candidates as they
1602 * are documented to be for Synaptics corp. internal use.
1603 */
1604 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1605 (info->model_id & 0x000000ff);
1606
1607 if (absolute_mode) {
1608 psmouse->protocol_handler = synaptics_process_byte;
1609 psmouse->pktsize = 6;
1610 } else {
1611 /* Relative mode follows standard PS/2 mouse protocol */
1612 psmouse->protocol_handler = psmouse_process_byte;
1613 psmouse->pktsize = 3;
1614 }
1615
1616 psmouse->set_rate = synaptics_set_rate;
1617 psmouse->disconnect = synaptics_disconnect;
1618 psmouse->reconnect = synaptics_reconnect;
1619 psmouse->cleanup = synaptics_reset;
1620 /* Synaptics can usually stay in sync without extra help */
1621 psmouse->resync_time = 0;
1622
1623 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1624 synaptics_pt_create(psmouse);
1625
1626 /*
1627 * Toshiba's KBC seems to have trouble handling data from
1628 * Synaptics at full rate. Switch to a lower rate (roughly
1629 * the same rate as a standard PS/2 mouse).
1630 */
1631 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1632 psmouse_info(psmouse,
1633 "Toshiba %s detected, limiting rate to 40pps.\n",
1634 dmi_get_system_info(DMI_PRODUCT_NAME));
1635 psmouse->rate = 40;
1636 }
1637
1638 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1639 err = device_create_file(&psmouse->ps2dev.serio->dev,
1640 &psmouse_attr_disable_gesture.dattr);
1641 if (err) {
1642 psmouse_err(psmouse,
1643 "Failed to create disable_gesture attribute (%d)",
1644 err);
1645 goto init_fail;
1646 }
1647 }
1648
1649 return 0;
1650
1651 init_fail:
1652 kfree(priv);
1653 return err;
1654 }
1655
1656 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1657 {
1658 struct synaptics_device_info info;
1659 int error;
1660
1661 psmouse_reset(psmouse);
1662
1663 error = synaptics_query_hardware(psmouse, &info);
1664 if (error) {
1665 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1666 return error;
1667 }
1668
1669 return synaptics_init_ps2(psmouse, &info, absolute_mode);
1670 }
1671
1672 int synaptics_init_absolute(struct psmouse *psmouse)
1673 {
1674 return __synaptics_init(psmouse, true);
1675 }
1676
1677 int synaptics_init_relative(struct psmouse *psmouse)
1678 {
1679 return __synaptics_init(psmouse, false);
1680 }
1681
1682 static int synaptics_setup_ps2(struct psmouse *psmouse,
1683 struct synaptics_device_info *info)
1684 {
1685 bool absolute_mode = true;
1686 int error;
1687
1688 /*
1689 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1690 * packet spew overloads the EC such that key presses on the keyboard
1691 * are missed. Given that, don't even attempt to use Absolute mode.
1692 * Relative mode seems to work just fine.
1693 */
1694 if (broken_olpc_ec) {
1695 psmouse_info(psmouse,
1696 "OLPC XO detected, forcing relative protocol.\n");
1697 absolute_mode = false;
1698 }
1699
1700 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1701 if (error)
1702 return error;
1703
1704 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1705 }
1706
1707 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1708
1709 void __init synaptics_module_init(void)
1710 {
1711 }
1712
1713 static int __maybe_unused
1714 synaptics_setup_ps2(struct psmouse *psmouse,
1715 struct synaptics_device_info *info)
1716 {
1717 return -ENOSYS;
1718 }
1719
1720 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1721
1722 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1723
1724 /*
1725 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1726 * provides a better bandwidth and allow a better control of the touchpads.
1727 * This is used to decide if we need to use this bus or not.
1728 */
1729 enum {
1730 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1731 SYNAPTICS_INTERTOUCH_OFF,
1732 SYNAPTICS_INTERTOUCH_ON,
1733 };
1734
1735 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1736 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1737 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1738 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1739
1740 static int synaptics_create_intertouch(struct psmouse *psmouse,
1741 struct synaptics_device_info *info,
1742 bool leave_breadcrumbs)
1743 {
1744 bool topbuttonpad =
1745 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1746 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1747 const struct rmi_device_platform_data pdata = {
1748 .sensor_pdata = {
1749 .sensor_type = rmi_sensor_touchpad,
1750 .axis_align.flip_y = true,
1751 .kernel_tracking = false,
1752 .topbuttonpad = topbuttonpad,
1753 },
1754 .f30_data = {
1755 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1756 .trackstick_buttons =
1757 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1758 },
1759 };
1760 const struct i2c_board_info intertouch_board = {
1761 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1762 .flags = I2C_CLIENT_HOST_NOTIFY,
1763 };
1764
1765 return psmouse_smbus_init(psmouse, &intertouch_board,
1766 &pdata, sizeof(pdata), true,
1767 leave_breadcrumbs);
1768 }
1769
1770 /**
1771 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1772 * and decides to instantiate a SMBus InterTouch device.
1773 */
1774 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1775 struct synaptics_device_info *info,
1776 bool leave_breadcrumbs)
1777 {
1778 int error;
1779
1780 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1781 return -ENXIO;
1782
1783 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1784 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1785 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1786
1787 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1788 psmouse_info(psmouse,
1789 "Your touchpad (%s) says it can support a different bus. "
1790 "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",
1791 psmouse->ps2dev.serio->firmware_id);
1792
1793 return -ENXIO;
1794 }
1795 }
1796
1797 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1798
1799 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1800 if (error) {
1801 if (error == -EAGAIN)
1802 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1803 else
1804 psmouse_err(psmouse, "unable to create intertouch device\n");
1805
1806 return error;
1807 }
1808
1809 return 0;
1810 }
1811
1812 int synaptics_init_smbus(struct psmouse *psmouse)
1813 {
1814 struct synaptics_device_info info;
1815 int error;
1816
1817 psmouse_reset(psmouse);
1818
1819 error = synaptics_query_hardware(psmouse, &info);
1820 if (error) {
1821 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1822 return error;
1823 }
1824
1825 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1826 return -ENXIO;
1827
1828 return synaptics_create_intertouch(psmouse, &info, false);
1829 }
1830
1831 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1832
1833 static int __maybe_unused
1834 synaptics_setup_intertouch(struct psmouse *psmouse,
1835 struct synaptics_device_info *info,
1836 bool leave_breadcrumbs)
1837 {
1838 return -ENOSYS;
1839 }
1840
1841 int synaptics_init_smbus(struct psmouse *psmouse)
1842 {
1843 return -ENOSYS;
1844 }
1845
1846 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1847
1848 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1849 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1850
1851 int synaptics_init(struct psmouse *psmouse)
1852 {
1853 struct synaptics_device_info info;
1854 int error;
1855 int retval;
1856
1857 psmouse_reset(psmouse);
1858
1859 error = synaptics_query_hardware(psmouse, &info);
1860 if (error) {
1861 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1862 return error;
1863 }
1864
1865 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1866 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1867 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1868 /* Forcepads need F21, which is not ready */
1869 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1870 psmouse_warn(psmouse,
1871 "The touchpad can support a better bus than the too old PS/2 protocol. "
1872 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1873 }
1874
1875 error = synaptics_setup_intertouch(psmouse, &info, true);
1876 if (!error)
1877 return PSMOUSE_SYNAPTICS_SMBUS;
1878 }
1879
1880 retval = synaptics_setup_ps2(psmouse, &info);
1881 if (retval < 0) {
1882 /*
1883 * Not using any flavor of Synaptics support, so clean up
1884 * SMbus breadcrumbs, if any.
1885 */
1886 psmouse_smbus_cleanup(psmouse);
1887 }
1888
1889 return retval;
1890 }
1891
1892 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1893
1894 int synaptics_init(struct psmouse *psmouse)
1895 {
1896 return -ENOSYS;
1897 }
1898
1899 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
A mirror of Linus' kernel repository