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 */
synaptics_mode_cmd(struct psmouse * psmouse,u8 mode)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
synaptics_detect(struct psmouse * psmouse,bool set_properties)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
synaptics_reset(struct psmouse * psmouse)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 "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
183 "LEN009b", /* T580 */
184 "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
185 "LEN040f", /* P1 Gen 3 */
186 "LEN0411", /* L14 Gen 1 */
187 "LEN200f", /* T450s */
188 "LEN2044", /* L470 */
189 "LEN2054", /* E480 */
190 "LEN2055", /* E580 */
191 "LEN2068", /* T14 Gen 1 */
192 "SYN3015", /* HP EliteBook 840 G2 */
193 "SYN3052", /* HP EliteBook 840 G4 */
194 "SYN3221", /* HP 15-ay000 */
195 "SYN323d", /* HP Spectre X360 13-w013dx */
196 "SYN3257", /* HP Envy 13-ad105ng */
197 NULL
198 };
199
200 static const char * const forcepad_pnp_ids[] = {
201 "SYN300D",
202 "SYN3014",
203 NULL
204 };
205
206 /*
207 * Send a command to the synaptics touchpad by special commands
208 */
synaptics_send_cmd(struct psmouse * psmouse,u8 cmd,u8 * param)209 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
210 {
211 int error;
212
213 error = ps2_sliced_command(&psmouse->ps2dev, cmd);
214 if (error)
215 return error;
216
217 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
218 if (error)
219 return error;
220
221 return 0;
222 }
223
synaptics_query_int(struct psmouse * psmouse,u8 query_cmd,u32 * val)224 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
225 {
226 int error;
227 union {
228 __be32 be_val;
229 char buf[4];
230 } resp = { 0 };
231
232 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
233 if (error)
234 return error;
235
236 *val = be32_to_cpu(resp.be_val);
237 return 0;
238 }
239
240 /*
241 * Identify Touchpad
242 * See also the SYN_ID_* macros
243 */
synaptics_identify(struct psmouse * psmouse,struct synaptics_device_info * info)244 static int synaptics_identify(struct psmouse *psmouse,
245 struct synaptics_device_info *info)
246 {
247 int error;
248
249 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
250 if (error)
251 return error;
252
253 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
254 }
255
256 /*
257 * Read the model-id bytes from the touchpad
258 * see also SYN_MODEL_* macros
259 */
synaptics_model_id(struct psmouse * psmouse,struct synaptics_device_info * info)260 static int synaptics_model_id(struct psmouse *psmouse,
261 struct synaptics_device_info *info)
262 {
263 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
264 }
265
266 /*
267 * Read the firmware id from the touchpad
268 */
synaptics_firmware_id(struct psmouse * psmouse,struct synaptics_device_info * info)269 static int synaptics_firmware_id(struct psmouse *psmouse,
270 struct synaptics_device_info *info)
271 {
272 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
273 &info->firmware_id);
274 }
275
276 /*
277 * Read the board id and the "More Extended Queries" from the touchpad
278 * The board id is encoded in the "QUERY MODES" response
279 */
synaptics_query_modes(struct psmouse * psmouse,struct synaptics_device_info * info)280 static int synaptics_query_modes(struct psmouse *psmouse,
281 struct synaptics_device_info *info)
282 {
283 u8 bid[3];
284 int error;
285
286 /* firmwares prior 7.5 have no board_id encoded */
287 if (SYN_ID_FULL(info->identity) < 0x705)
288 return 0;
289
290 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
291 if (error)
292 return error;
293
294 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
295
296 if (SYN_MEXT_CAP_BIT(bid[0]))
297 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
298 &info->ext_cap_10);
299
300 return 0;
301 }
302
303 /*
304 * Read the capability-bits from the touchpad
305 * see also the SYN_CAP_* macros
306 */
synaptics_capability(struct psmouse * psmouse,struct synaptics_device_info * info)307 static int synaptics_capability(struct psmouse *psmouse,
308 struct synaptics_device_info *info)
309 {
310 int error;
311
312 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
313 &info->capabilities);
314 if (error)
315 return error;
316
317 info->ext_cap = info->ext_cap_0c = 0;
318
319 /*
320 * Older firmwares had submodel ID fixed to 0x47
321 */
322 if (SYN_ID_FULL(info->identity) < 0x705 &&
323 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
324 return -ENXIO;
325 }
326
327 /*
328 * Unless capExtended is set the rest of the flags should be ignored
329 */
330 if (!SYN_CAP_EXTENDED(info->capabilities))
331 info->capabilities = 0;
332
333 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
334 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
335 &info->ext_cap);
336 if (error) {
337 psmouse_warn(psmouse,
338 "device claims to have extended capabilities, but I'm not able to read them.\n");
339 } else {
340 /*
341 * if nExtBtn is greater than 8 it should be considered
342 * invalid and treated as 0
343 */
344 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
345 info->ext_cap &= ~SYN_CAP_MB_MASK;
346 }
347 }
348
349 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
350 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
351 &info->ext_cap_0c);
352 if (error)
353 psmouse_warn(psmouse,
354 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
355 }
356
357 return 0;
358 }
359
360 /*
361 * Read touchpad resolution and maximum reported coordinates
362 * Resolution is left zero if touchpad does not support the query
363 */
synaptics_resolution(struct psmouse * psmouse,struct synaptics_device_info * info)364 static int synaptics_resolution(struct psmouse *psmouse,
365 struct synaptics_device_info *info)
366 {
367 u8 resp[3];
368 int error;
369
370 if (SYN_ID_MAJOR(info->identity) < 4)
371 return 0;
372
373 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
374 if (!error) {
375 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
376 info->x_res = resp[0]; /* x resolution in units/mm */
377 info->y_res = resp[2]; /* y resolution in units/mm */
378 }
379 }
380
381 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
382 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
383 error = synaptics_send_cmd(psmouse,
384 SYN_QUE_EXT_MAX_COORDS, resp);
385 if (error) {
386 psmouse_warn(psmouse,
387 "device claims to have max coordinates query, but I'm not able to read it.\n");
388 } else {
389 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
390 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
391 psmouse_info(psmouse,
392 "queried max coordinates: x [..%d], y [..%d]\n",
393 info->x_max, info->y_max);
394 }
395 }
396
397 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
398 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
399 /*
400 * Firmware v8.1 does not report proper number of extended
401 * capabilities, but has been proven to report correct min
402 * coordinates.
403 */
404 SYN_ID_FULL(info->identity) == 0x801)) {
405 error = synaptics_send_cmd(psmouse,
406 SYN_QUE_EXT_MIN_COORDS, resp);
407 if (error) {
408 psmouse_warn(psmouse,
409 "device claims to have min coordinates query, but I'm not able to read it.\n");
410 } else {
411 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
412 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
413 psmouse_info(psmouse,
414 "queried min coordinates: x [%d..], y [%d..]\n",
415 info->x_min, info->y_min);
416 }
417 }
418
419 return 0;
420 }
421
synaptics_query_hardware(struct psmouse * psmouse,struct synaptics_device_info * info)422 static int synaptics_query_hardware(struct psmouse *psmouse,
423 struct synaptics_device_info *info)
424 {
425 int error;
426
427 memset(info, 0, sizeof(*info));
428
429 error = synaptics_identify(psmouse, info);
430 if (error)
431 return error;
432
433 error = synaptics_model_id(psmouse, info);
434 if (error)
435 return error;
436
437 error = synaptics_firmware_id(psmouse, info);
438 if (error)
439 return error;
440
441 error = synaptics_query_modes(psmouse, info);
442 if (error)
443 return error;
444
445 error = synaptics_capability(psmouse, info);
446 if (error)
447 return error;
448
449 error = synaptics_resolution(psmouse, info);
450 if (error)
451 return error;
452
453 return 0;
454 }
455
456 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
457
458 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
459
460 static bool cr48_profile_sensor;
461
462 #define ANY_BOARD_ID 0
463 struct min_max_quirk {
464 const char * const *pnp_ids;
465 struct {
466 u32 min, max;
467 } board_id;
468 u32 x_min, x_max, y_min, y_max;
469 };
470
471 static const struct min_max_quirk min_max_pnpid_table[] = {
472 {
473 (const char * const []){"LEN0033", NULL},
474 {ANY_BOARD_ID, ANY_BOARD_ID},
475 1024, 5052, 2258, 4832
476 },
477 {
478 (const char * const []){"LEN0042", NULL},
479 {ANY_BOARD_ID, ANY_BOARD_ID},
480 1232, 5710, 1156, 4696
481 },
482 {
483 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
484 "LEN0039", "LEN2002", "LEN2004",
485 NULL},
486 {ANY_BOARD_ID, 2961},
487 1024, 5112, 2024, 4832
488 },
489 {
490 (const char * const []){"LEN2000", NULL},
491 {ANY_BOARD_ID, ANY_BOARD_ID},
492 1024, 5113, 2021, 4832
493 },
494 {
495 (const char * const []){"LEN2001", NULL},
496 {ANY_BOARD_ID, ANY_BOARD_ID},
497 1024, 5022, 2508, 4832
498 },
499 {
500 (const char * const []){"LEN2006", NULL},
501 {2691, 2691},
502 1024, 5045, 2457, 4832
503 },
504 {
505 (const char * const []){"LEN2006", NULL},
506 {ANY_BOARD_ID, ANY_BOARD_ID},
507 1264, 5675, 1171, 4688
508 },
509 { }
510 };
511
512 /*****************************************************************************
513 * Synaptics communications functions
514 ****************************************************************************/
515
516 /*
517 * Synaptics touchpads report the y coordinate from bottom to top, which is
518 * opposite from what userspace expects.
519 * This function is used to invert y before reporting.
520 */
synaptics_invert_y(int y)521 static int synaptics_invert_y(int y)
522 {
523 return YMAX_NOMINAL + YMIN_NOMINAL - y;
524 }
525
526 /*
527 * Apply quirk(s) if the hardware matches
528 */
synaptics_apply_quirks(struct psmouse * psmouse,struct synaptics_device_info * info)529 static void synaptics_apply_quirks(struct psmouse *psmouse,
530 struct synaptics_device_info *info)
531 {
532 int i;
533
534 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
535 if (!psmouse_matches_pnp_id(psmouse,
536 min_max_pnpid_table[i].pnp_ids))
537 continue;
538
539 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
540 info->board_id < min_max_pnpid_table[i].board_id.min)
541 continue;
542
543 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
544 info->board_id > min_max_pnpid_table[i].board_id.max)
545 continue;
546
547 info->x_min = min_max_pnpid_table[i].x_min;
548 info->x_max = min_max_pnpid_table[i].x_max;
549 info->y_min = min_max_pnpid_table[i].y_min;
550 info->y_max = min_max_pnpid_table[i].y_max;
551 psmouse_info(psmouse,
552 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
553 info->x_min, info->x_max,
554 info->y_min, info->y_max);
555 break;
556 }
557 }
558
synaptics_has_agm(struct synaptics_data * priv)559 static bool synaptics_has_agm(struct synaptics_data *priv)
560 {
561 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
562 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
563 }
564
synaptics_set_advanced_gesture_mode(struct psmouse * psmouse)565 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
566 {
567 static u8 param = 0xc8;
568 int error;
569
570 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
571 if (error)
572 return error;
573
574 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE);
575 if (error)
576 return error;
577
578 return 0;
579 }
580
synaptics_set_mode(struct psmouse * psmouse)581 static int synaptics_set_mode(struct psmouse *psmouse)
582 {
583 struct synaptics_data *priv = psmouse->private;
584 int error;
585
586 priv->mode = 0;
587 if (priv->absolute_mode)
588 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
589 if (priv->disable_gesture)
590 priv->mode |= SYN_BIT_DISABLE_GESTURE;
591 if (psmouse->rate >= 80)
592 priv->mode |= SYN_BIT_HIGH_RATE;
593 if (SYN_CAP_EXTENDED(priv->info.capabilities))
594 priv->mode |= SYN_BIT_W_MODE;
595
596 error = synaptics_mode_cmd(psmouse, priv->mode);
597 if (error)
598 return error;
599
600 if (priv->absolute_mode && synaptics_has_agm(priv)) {
601 error = synaptics_set_advanced_gesture_mode(psmouse);
602 if (error) {
603 psmouse_err(psmouse,
604 "Advanced gesture mode init failed: %d\n",
605 error);
606 return error;
607 }
608 }
609
610 return 0;
611 }
612
synaptics_set_rate(struct psmouse * psmouse,unsigned int rate)613 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
614 {
615 struct synaptics_data *priv = psmouse->private;
616
617 if (rate >= 80) {
618 priv->mode |= SYN_BIT_HIGH_RATE;
619 psmouse->rate = 80;
620 } else {
621 priv->mode &= ~SYN_BIT_HIGH_RATE;
622 psmouse->rate = 40;
623 }
624
625 synaptics_mode_cmd(psmouse, priv->mode);
626 }
627
628 /*****************************************************************************
629 * Synaptics pass-through PS/2 port support
630 ****************************************************************************/
synaptics_pt_write(struct serio * serio,u8 c)631 static int synaptics_pt_write(struct serio *serio, u8 c)
632 {
633 struct psmouse *parent = psmouse_from_serio(serio->parent);
634 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
635 int error;
636
637 error = ps2_sliced_command(&parent->ps2dev, c);
638 if (error)
639 return error;
640
641 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
642 if (error)
643 return error;
644
645 return 0;
646 }
647
synaptics_pt_start(struct serio * serio)648 static int synaptics_pt_start(struct serio *serio)
649 {
650 struct psmouse *parent = psmouse_from_serio(serio->parent);
651 struct synaptics_data *priv = parent->private;
652
653 serio_pause_rx(parent->ps2dev.serio);
654 priv->pt_port = serio;
655 serio_continue_rx(parent->ps2dev.serio);
656
657 return 0;
658 }
659
synaptics_pt_stop(struct serio * serio)660 static void synaptics_pt_stop(struct serio *serio)
661 {
662 struct psmouse *parent = psmouse_from_serio(serio->parent);
663 struct synaptics_data *priv = parent->private;
664
665 serio_pause_rx(parent->ps2dev.serio);
666 priv->pt_port = NULL;
667 serio_continue_rx(parent->ps2dev.serio);
668 }
669
synaptics_is_pt_packet(u8 * buf)670 static int synaptics_is_pt_packet(u8 *buf)
671 {
672 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
673 }
674
synaptics_pass_pt_packet(struct serio * ptport,u8 * packet)675 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
676 {
677 struct psmouse *child = psmouse_from_serio(ptport);
678
679 if (child && child->state == PSMOUSE_ACTIVATED) {
680 serio_interrupt(ptport, packet[1], 0);
681 serio_interrupt(ptport, packet[4], 0);
682 serio_interrupt(ptport, packet[5], 0);
683 if (child->pktsize == 4)
684 serio_interrupt(ptport, packet[2], 0);
685 } else {
686 serio_interrupt(ptport, packet[1], 0);
687 }
688 }
689
synaptics_pt_activate(struct psmouse * psmouse)690 static void synaptics_pt_activate(struct psmouse *psmouse)
691 {
692 struct synaptics_data *priv = psmouse->private;
693 struct psmouse *child = psmouse_from_serio(priv->pt_port);
694
695 /* adjust the touchpad to child's choice of protocol */
696 if (child) {
697 if (child->pktsize == 4)
698 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
699 else
700 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
701
702 if (synaptics_mode_cmd(psmouse, priv->mode))
703 psmouse_warn(psmouse,
704 "failed to switch guest protocol\n");
705 }
706 }
707
synaptics_pt_create(struct psmouse * psmouse)708 static void synaptics_pt_create(struct psmouse *psmouse)
709 {
710 struct serio *serio;
711
712 serio = kzalloc(sizeof(*serio), GFP_KERNEL);
713 if (!serio) {
714 psmouse_err(psmouse,
715 "not enough memory for pass-through port\n");
716 return;
717 }
718
719 serio->id.type = SERIO_PS_PSTHRU;
720 strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
721 strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
722 serio->write = synaptics_pt_write;
723 serio->start = synaptics_pt_start;
724 serio->stop = synaptics_pt_stop;
725 serio->parent = psmouse->ps2dev.serio;
726
727 psmouse->pt_activate = synaptics_pt_activate;
728
729 psmouse_info(psmouse, "serio: %s port at %s\n",
730 serio->name, psmouse->phys);
731 serio_register_port(serio);
732 }
733
734 /*****************************************************************************
735 * Functions to interpret the absolute mode packets
736 ****************************************************************************/
737
synaptics_parse_agm(const u8 buf[],struct synaptics_data * priv,struct synaptics_hw_state * hw)738 static void synaptics_parse_agm(const u8 buf[],
739 struct synaptics_data *priv,
740 struct synaptics_hw_state *hw)
741 {
742 struct synaptics_hw_state *agm = &priv->agm;
743 int agm_packet_type;
744
745 agm_packet_type = (buf[5] & 0x30) >> 4;
746 switch (agm_packet_type) {
747 case 1:
748 /* Gesture packet: (x, y, z) half resolution */
749 agm->w = hw->w;
750 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
751 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
752 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
753 break;
754
755 case 2:
756 /* AGM-CONTACT packet: we are only interested in the count */
757 priv->agm_count = buf[1];
758 break;
759
760 default:
761 break;
762 }
763 }
764
synaptics_parse_ext_buttons(const u8 buf[],struct synaptics_data * priv,struct synaptics_hw_state * hw)765 static void synaptics_parse_ext_buttons(const u8 buf[],
766 struct synaptics_data *priv,
767 struct synaptics_hw_state *hw)
768 {
769 unsigned int ext_bits =
770 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
771 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
772
773 hw->ext_buttons = buf[4] & ext_mask;
774 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
775 }
776
synaptics_parse_hw_state(const u8 buf[],struct synaptics_data * priv,struct synaptics_hw_state * hw)777 static int synaptics_parse_hw_state(const u8 buf[],
778 struct synaptics_data *priv,
779 struct synaptics_hw_state *hw)
780 {
781 memset(hw, 0, sizeof(struct synaptics_hw_state));
782
783 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
784 hw->w = (((buf[0] & 0x30) >> 2) |
785 ((buf[0] & 0x04) >> 1) |
786 ((buf[3] & 0x04) >> 2));
787
788 if (synaptics_has_agm(priv) && hw->w == 2) {
789 synaptics_parse_agm(buf, priv, hw);
790 return 1;
791 }
792
793 hw->x = (((buf[3] & 0x10) << 8) |
794 ((buf[1] & 0x0f) << 8) |
795 buf[4]);
796 hw->y = (((buf[3] & 0x20) << 7) |
797 ((buf[1] & 0xf0) << 4) |
798 buf[5]);
799 hw->z = buf[2];
800
801 hw->left = (buf[0] & 0x01) ? 1 : 0;
802 hw->right = (buf[0] & 0x02) ? 1 : 0;
803
804 if (priv->is_forcepad) {
805 /*
806 * ForcePads, like Clickpads, use middle button
807 * bits to report primary button clicks.
808 * Unfortunately they report primary button not
809 * only when user presses on the pad above certain
810 * threshold, but also when there are more than one
811 * finger on the touchpad, which interferes with
812 * out multi-finger gestures.
813 */
814 if (hw->z == 0) {
815 /* No contacts */
816 priv->press = priv->report_press = false;
817 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
818 /*
819 * Single-finger touch with pressure above
820 * the threshold. If pressure stays long
821 * enough, we'll start reporting primary
822 * button. We rely on the device continuing
823 * sending data even if finger does not
824 * move.
825 */
826 if (!priv->press) {
827 priv->press_start = jiffies;
828 priv->press = true;
829 } else if (time_after(jiffies,
830 priv->press_start +
831 msecs_to_jiffies(50))) {
832 priv->report_press = true;
833 }
834 } else {
835 priv->press = false;
836 }
837
838 hw->left = priv->report_press;
839
840 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
841 /*
842 * Clickpad's button is transmitted as middle button,
843 * however, since it is primary button, we will report
844 * it as BTN_LEFT.
845 */
846 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
847
848 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
849 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
850 if (hw->w == 2)
851 hw->scroll = (s8)buf[1];
852 }
853
854 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
855 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
856 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
857 }
858
859 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
860 ((buf[0] ^ buf[3]) & 0x02)) {
861 synaptics_parse_ext_buttons(buf, priv, hw);
862 }
863 } else {
864 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
865 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
866
867 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
868 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
869
870 hw->left = (buf[0] & 0x01) ? 1 : 0;
871 hw->right = (buf[0] & 0x02) ? 1 : 0;
872 }
873
874 /*
875 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
876 * is used by some firmware to indicate a finger at the edge of
877 * the touchpad whose precise position cannot be determined, so
878 * convert these values to the maximum axis value.
879 */
880 if (hw->x > X_MAX_POSITIVE)
881 hw->x -= 1 << ABS_POS_BITS;
882 else if (hw->x == X_MAX_POSITIVE)
883 hw->x = XMAX;
884
885 if (hw->y > Y_MAX_POSITIVE)
886 hw->y -= 1 << ABS_POS_BITS;
887 else if (hw->y == Y_MAX_POSITIVE)
888 hw->y = YMAX;
889
890 return 0;
891 }
892
synaptics_report_semi_mt_slot(struct input_dev * dev,int slot,bool active,int x,int y)893 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
894 bool active, int x, int y)
895 {
896 input_mt_slot(dev, slot);
897 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
898 if (active) {
899 input_report_abs(dev, ABS_MT_POSITION_X, x);
900 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
901 }
902 }
903
synaptics_report_semi_mt_data(struct input_dev * dev,const struct synaptics_hw_state * a,const struct synaptics_hw_state * b,int num_fingers)904 static void synaptics_report_semi_mt_data(struct input_dev *dev,
905 const struct synaptics_hw_state *a,
906 const struct synaptics_hw_state *b,
907 int num_fingers)
908 {
909 if (num_fingers >= 2) {
910 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
911 min(a->y, b->y));
912 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
913 max(a->y, b->y));
914 } else if (num_fingers == 1) {
915 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
916 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
917 } else {
918 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
919 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
920 }
921 }
922
synaptics_report_ext_buttons(struct psmouse * psmouse,const struct synaptics_hw_state * hw)923 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
924 const struct synaptics_hw_state *hw)
925 {
926 struct input_dev *dev = psmouse->dev;
927 struct synaptics_data *priv = psmouse->private;
928 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
929 int i;
930
931 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
932 return;
933
934 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
935 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
936 SYN_ID_FULL(priv->info.identity) == 0x802) &&
937 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
938 return;
939
940 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
941 for (i = 0; i < ext_bits; i++) {
942 input_report_key(dev, BTN_0 + 2 * i,
943 hw->ext_buttons & BIT(i));
944 input_report_key(dev, BTN_1 + 2 * i,
945 hw->ext_buttons & BIT(i + ext_bits));
946 }
947 return;
948 }
949
950 /*
951 * This generation of touchpads has the trackstick buttons
952 * physically wired to the touchpad. Re-route them through
953 * the pass-through interface.
954 */
955 if (priv->pt_port) {
956 u8 pt_buttons;
957
958 /* The trackstick expects at most 3 buttons */
959 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
960 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
961 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
962
963 serio_interrupt(priv->pt_port,
964 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
965 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
966 }
967 }
968
synaptics_report_buttons(struct psmouse * psmouse,const struct synaptics_hw_state * hw)969 static void synaptics_report_buttons(struct psmouse *psmouse,
970 const struct synaptics_hw_state *hw)
971 {
972 struct input_dev *dev = psmouse->dev;
973 struct synaptics_data *priv = psmouse->private;
974
975 input_report_key(dev, BTN_LEFT, hw->left);
976 input_report_key(dev, BTN_RIGHT, hw->right);
977
978 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
979 input_report_key(dev, BTN_MIDDLE, hw->middle);
980
981 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
982 input_report_key(dev, BTN_FORWARD, hw->up);
983 input_report_key(dev, BTN_BACK, hw->down);
984 }
985
986 synaptics_report_ext_buttons(psmouse, hw);
987 }
988
synaptics_report_mt_data(struct psmouse * psmouse,const struct synaptics_hw_state * sgm,int num_fingers)989 static void synaptics_report_mt_data(struct psmouse *psmouse,
990 const struct synaptics_hw_state *sgm,
991 int num_fingers)
992 {
993 struct input_dev *dev = psmouse->dev;
994 struct synaptics_data *priv = psmouse->private;
995 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
996 struct input_mt_pos pos[2];
997 int slot[2], nsemi, i;
998
999 nsemi = clamp_val(num_fingers, 0, 2);
1000
1001 for (i = 0; i < nsemi; i++) {
1002 pos[i].x = hw[i]->x;
1003 pos[i].y = synaptics_invert_y(hw[i]->y);
1004 }
1005
1006 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1007
1008 for (i = 0; i < nsemi; i++) {
1009 input_mt_slot(dev, slot[i]);
1010 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1011 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1012 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1013 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1014 }
1015
1016 input_mt_drop_unused(dev);
1017
1018 /* Don't use active slot count to generate BTN_TOOL events. */
1019 input_mt_report_pointer_emulation(dev, false);
1020
1021 /* Send the number of fingers reported by touchpad itself. */
1022 input_mt_report_finger_count(dev, num_fingers);
1023
1024 synaptics_report_buttons(psmouse, sgm);
1025
1026 input_sync(dev);
1027 }
1028
synaptics_image_sensor_process(struct psmouse * psmouse,struct synaptics_hw_state * sgm)1029 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1030 struct synaptics_hw_state *sgm)
1031 {
1032 struct synaptics_data *priv = psmouse->private;
1033 int num_fingers;
1034
1035 /*
1036 * Update mt_state using the new finger count and current mt_state.
1037 */
1038 if (sgm->z == 0)
1039 num_fingers = 0;
1040 else if (sgm->w >= 4)
1041 num_fingers = 1;
1042 else if (sgm->w == 0)
1043 num_fingers = 2;
1044 else if (sgm->w == 1)
1045 num_fingers = priv->agm_count ? priv->agm_count : 3;
1046 else
1047 num_fingers = 4;
1048
1049 /* Send resulting input events to user space */
1050 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1051 }
1052
synaptics_has_multifinger(struct synaptics_data * priv)1053 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1054 {
1055 if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1056 return true;
1057
1058 /* Advanced gesture mode also sends multi finger data */
1059 return synaptics_has_agm(priv);
1060 }
1061
1062 /*
1063 * called for each full received packet from the touchpad
1064 */
synaptics_process_packet(struct psmouse * psmouse)1065 static void synaptics_process_packet(struct psmouse *psmouse)
1066 {
1067 struct input_dev *dev = psmouse->dev;
1068 struct synaptics_data *priv = psmouse->private;
1069 struct synaptics_device_info *info = &priv->info;
1070 struct synaptics_hw_state hw;
1071 int num_fingers;
1072 int finger_width;
1073
1074 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1075 return;
1076
1077 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1078 synaptics_image_sensor_process(psmouse, &hw);
1079 return;
1080 }
1081
1082 if (hw.scroll) {
1083 priv->scroll += hw.scroll;
1084
1085 while (priv->scroll >= 4) {
1086 input_report_key(dev, BTN_BACK, !hw.down);
1087 input_sync(dev);
1088 input_report_key(dev, BTN_BACK, hw.down);
1089 input_sync(dev);
1090 priv->scroll -= 4;
1091 }
1092 while (priv->scroll <= -4) {
1093 input_report_key(dev, BTN_FORWARD, !hw.up);
1094 input_sync(dev);
1095 input_report_key(dev, BTN_FORWARD, hw.up);
1096 input_sync(dev);
1097 priv->scroll += 4;
1098 }
1099 return;
1100 }
1101
1102 if (hw.z > 0 && hw.x > 1) {
1103 num_fingers = 1;
1104 finger_width = 5;
1105 if (SYN_CAP_EXTENDED(info->capabilities)) {
1106 switch (hw.w) {
1107 case 0 ... 1:
1108 if (synaptics_has_multifinger(priv))
1109 num_fingers = hw.w + 2;
1110 break;
1111 case 2:
1112 /*
1113 * SYN_MODEL_PEN(info->model_id): even if
1114 * the device supports pen, we treat it as
1115 * a single finger.
1116 */
1117 break;
1118 case 4 ... 15:
1119 if (SYN_CAP_PALMDETECT(info->capabilities))
1120 finger_width = hw.w;
1121 break;
1122 }
1123 }
1124 } else {
1125 num_fingers = 0;
1126 finger_width = 0;
1127 }
1128
1129 if (cr48_profile_sensor) {
1130 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1131 return;
1132 }
1133
1134 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1135 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1136 num_fingers);
1137
1138 /* Post events
1139 * BTN_TOUCH has to be first as mousedev relies on it when doing
1140 * absolute -> relative conversion
1141 */
1142 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1143 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1144
1145 if (num_fingers > 0) {
1146 input_report_abs(dev, ABS_X, hw.x);
1147 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1148 }
1149 input_report_abs(dev, ABS_PRESSURE, hw.z);
1150
1151 if (SYN_CAP_PALMDETECT(info->capabilities))
1152 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1153
1154 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1155 if (synaptics_has_multifinger(priv)) {
1156 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1157 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1158 }
1159
1160 synaptics_report_buttons(psmouse, &hw);
1161
1162 input_sync(dev);
1163 }
1164
synaptics_validate_byte(struct psmouse * psmouse,int idx,enum synaptics_pkt_type pkt_type)1165 static bool synaptics_validate_byte(struct psmouse *psmouse,
1166 int idx, enum synaptics_pkt_type pkt_type)
1167 {
1168 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1169 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1170 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1171 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1172 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1173 const u8 *packet = psmouse->packet;
1174
1175 if (idx < 0 || idx > 4)
1176 return false;
1177
1178 switch (pkt_type) {
1179
1180 case SYN_NEWABS:
1181 case SYN_NEWABS_RELAXED:
1182 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1183
1184 case SYN_NEWABS_STRICT:
1185 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1186
1187 case SYN_OLDABS:
1188 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1189
1190 default:
1191 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1192 return false;
1193 }
1194 }
1195
1196 static enum synaptics_pkt_type
synaptics_detect_pkt_type(struct psmouse * psmouse)1197 synaptics_detect_pkt_type(struct psmouse *psmouse)
1198 {
1199 int i;
1200
1201 for (i = 0; i < 5; i++) {
1202 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1203 psmouse_info(psmouse, "using relaxed packet validation\n");
1204 return SYN_NEWABS_RELAXED;
1205 }
1206 }
1207
1208 return SYN_NEWABS_STRICT;
1209 }
1210
synaptics_process_byte(struct psmouse * psmouse)1211 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1212 {
1213 struct synaptics_data *priv = psmouse->private;
1214
1215 if (psmouse->pktcnt >= 6) { /* Full packet received */
1216 if (unlikely(priv->pkt_type == SYN_NEWABS))
1217 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1218
1219 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1220 synaptics_is_pt_packet(psmouse->packet)) {
1221 if (priv->pt_port)
1222 synaptics_pass_pt_packet(priv->pt_port,
1223 psmouse->packet);
1224 } else
1225 synaptics_process_packet(psmouse);
1226
1227 return PSMOUSE_FULL_PACKET;
1228 }
1229
1230 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1231 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1232 }
1233
1234 /*****************************************************************************
1235 * Driver initialization/cleanup functions
1236 ****************************************************************************/
set_abs_position_params(struct input_dev * dev,struct synaptics_device_info * info,int x_code,int y_code)1237 static void set_abs_position_params(struct input_dev *dev,
1238 struct synaptics_device_info *info,
1239 int x_code, int y_code)
1240 {
1241 int x_min = info->x_min ?: XMIN_NOMINAL;
1242 int x_max = info->x_max ?: XMAX_NOMINAL;
1243 int y_min = info->y_min ?: YMIN_NOMINAL;
1244 int y_max = info->y_max ?: YMAX_NOMINAL;
1245 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1246 SYN_REDUCED_FILTER_FUZZ : 0;
1247
1248 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1249 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1250 input_abs_set_res(dev, x_code, info->x_res);
1251 input_abs_set_res(dev, y_code, info->y_res);
1252 }
1253
set_input_params(struct psmouse * psmouse,struct synaptics_data * priv)1254 static int set_input_params(struct psmouse *psmouse,
1255 struct synaptics_data *priv)
1256 {
1257 struct input_dev *dev = psmouse->dev;
1258 struct synaptics_device_info *info = &priv->info;
1259 int i;
1260 int error;
1261
1262 /* Reset default psmouse capabilities */
1263 __clear_bit(EV_REL, dev->evbit);
1264 bitmap_zero(dev->relbit, REL_CNT);
1265 bitmap_zero(dev->keybit, KEY_CNT);
1266
1267 /* Things that apply to both modes */
1268 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1269
1270 input_set_capability(dev, EV_KEY, BTN_LEFT);
1271
1272 /* Clickpads report only left button */
1273 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1274 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1275 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1276 input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1277 }
1278
1279 if (!priv->absolute_mode) {
1280 /* Relative mode */
1281 input_set_capability(dev, EV_REL, REL_X);
1282 input_set_capability(dev, EV_REL, REL_Y);
1283 return 0;
1284 }
1285
1286 /* Absolute mode */
1287 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1288 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1289
1290 if (cr48_profile_sensor)
1291 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1292
1293 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1294 set_abs_position_params(dev, info,
1295 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1296 /* Image sensors can report per-contact pressure */
1297 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1298
1299 error = input_mt_init_slots(dev, 2,
1300 INPUT_MT_POINTER | INPUT_MT_TRACK);
1301 if (error)
1302 return error;
1303
1304 /* Image sensors can signal 4 and 5 finger clicks */
1305 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1306 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1307 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1308 set_abs_position_params(dev, info,
1309 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1310 /*
1311 * Profile sensor in CR-48 tracks contacts reasonably well,
1312 * other non-image sensors with AGM use semi-mt.
1313 */
1314 error = input_mt_init_slots(dev, 2,
1315 INPUT_MT_POINTER |
1316 (cr48_profile_sensor ?
1317 INPUT_MT_TRACK :
1318 INPUT_MT_SEMI_MT));
1319 if (error)
1320 return error;
1321
1322 /*
1323 * For semi-mt devices we send ABS_X/Y ourselves instead of
1324 * input_mt_report_pointer_emulation. But
1325 * input_mt_init_slots() resets the fuzz to 0, leading to a
1326 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1327 * position. Let's re-initialize ABS_X/Y here.
1328 */
1329 if (!cr48_profile_sensor)
1330 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1331 }
1332
1333 if (SYN_CAP_PALMDETECT(info->capabilities))
1334 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1335
1336 input_set_capability(dev, EV_KEY, BTN_TOUCH);
1337 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1338
1339 if (synaptics_has_multifinger(priv)) {
1340 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1341 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1342 }
1343
1344 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1345 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1346 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1347 input_set_capability(dev, EV_KEY, BTN_BACK);
1348 }
1349
1350 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1351 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1352 input_set_capability(dev, EV_KEY, BTN_0 + i);
1353
1354 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1355 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1356 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1357 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1358 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1359 }
1360
1361 return 0;
1362 }
1363
synaptics_show_disable_gesture(struct psmouse * psmouse,void * data,char * buf)1364 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1365 void *data, char *buf)
1366 {
1367 struct synaptics_data *priv = psmouse->private;
1368
1369 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1370 }
1371
synaptics_set_disable_gesture(struct psmouse * psmouse,void * data,const char * buf,size_t len)1372 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1373 void *data, const char *buf,
1374 size_t len)
1375 {
1376 struct synaptics_data *priv = psmouse->private;
1377 unsigned int value;
1378 int err;
1379
1380 err = kstrtouint(buf, 10, &value);
1381 if (err)
1382 return err;
1383
1384 if (value > 1)
1385 return -EINVAL;
1386
1387 if (value == priv->disable_gesture)
1388 return len;
1389
1390 priv->disable_gesture = value;
1391 if (value)
1392 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1393 else
1394 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1395
1396 if (synaptics_mode_cmd(psmouse, priv->mode))
1397 return -EIO;
1398
1399 return len;
1400 }
1401
1402 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1403 synaptics_show_disable_gesture,
1404 synaptics_set_disable_gesture);
1405
synaptics_disconnect(struct psmouse * psmouse)1406 static void synaptics_disconnect(struct psmouse *psmouse)
1407 {
1408 struct synaptics_data *priv = psmouse->private;
1409
1410 /*
1411 * We might have left a breadcrumb when trying to
1412 * set up SMbus companion.
1413 */
1414 psmouse_smbus_cleanup(psmouse);
1415
1416 if (!priv->absolute_mode &&
1417 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1418 device_remove_file(&psmouse->ps2dev.serio->dev,
1419 &psmouse_attr_disable_gesture.dattr);
1420
1421 synaptics_reset(psmouse);
1422 kfree(priv);
1423 psmouse->private = NULL;
1424 }
1425
synaptics_reconnect(struct psmouse * psmouse)1426 static int synaptics_reconnect(struct psmouse *psmouse)
1427 {
1428 struct synaptics_data *priv = psmouse->private;
1429 struct synaptics_device_info info;
1430 u8 param[2];
1431 int retry = 0;
1432 int error;
1433
1434 do {
1435 psmouse_reset(psmouse);
1436 if (retry) {
1437 /*
1438 * On some boxes, right after resuming, the touchpad
1439 * needs some time to finish initializing (I assume
1440 * it needs time to calibrate) and start responding
1441 * to Synaptics-specific queries, so let's wait a
1442 * bit.
1443 */
1444 ssleep(1);
1445 }
1446 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1447 error = synaptics_detect(psmouse, 0);
1448 } while (error && ++retry < 3);
1449
1450 if (error)
1451 return error;
1452
1453 if (retry > 1)
1454 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1455
1456 error = synaptics_query_hardware(psmouse, &info);
1457 if (error) {
1458 psmouse_err(psmouse, "Unable to query device.\n");
1459 return error;
1460 }
1461
1462 error = synaptics_set_mode(psmouse);
1463 if (error) {
1464 psmouse_err(psmouse, "Unable to initialize device.\n");
1465 return error;
1466 }
1467
1468 if (info.identity != priv->info.identity ||
1469 info.model_id != priv->info.model_id ||
1470 info.capabilities != priv->info.capabilities ||
1471 info.ext_cap != priv->info.ext_cap) {
1472 psmouse_err(psmouse,
1473 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1474 priv->info.identity, info.identity,
1475 priv->info.model_id, info.model_id,
1476 priv->info.capabilities, info.capabilities,
1477 priv->info.ext_cap, info.ext_cap);
1478 return -ENXIO;
1479 }
1480
1481 return 0;
1482 }
1483
1484 static bool impaired_toshiba_kbc;
1485
1486 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1487 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1488 {
1489 /* Toshiba Satellite */
1490 .matches = {
1491 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1492 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1493 },
1494 },
1495 {
1496 /* Toshiba Dynabook */
1497 .matches = {
1498 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1499 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1500 },
1501 },
1502 {
1503 /* Toshiba Portege M300 */
1504 .matches = {
1505 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1506 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1507 },
1508
1509 },
1510 {
1511 /* Toshiba Portege M300 */
1512 .matches = {
1513 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1514 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1515 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1516 },
1517
1518 },
1519 #endif
1520 { }
1521 };
1522
1523 static bool broken_olpc_ec;
1524
1525 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1526 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1527 {
1528 /* OLPC XO-1 or XO-1.5 */
1529 .matches = {
1530 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1531 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1532 },
1533 },
1534 #endif
1535 { }
1536 };
1537
1538 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1539 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1540 {
1541 /* Cr-48 Chromebook (Codename Mario) */
1542 .matches = {
1543 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1544 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1545 },
1546 },
1547 #endif
1548 { }
1549 };
1550
synaptics_module_init(void)1551 void __init synaptics_module_init(void)
1552 {
1553 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1554 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1555 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1556 }
1557
synaptics_init_ps2(struct psmouse * psmouse,struct synaptics_device_info * info,bool absolute_mode)1558 static int synaptics_init_ps2(struct psmouse *psmouse,
1559 struct synaptics_device_info *info,
1560 bool absolute_mode)
1561 {
1562 struct synaptics_data *priv;
1563 int err;
1564
1565 synaptics_apply_quirks(psmouse, info);
1566
1567 psmouse->private = priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1568 if (!priv)
1569 return -ENOMEM;
1570
1571 priv->info = *info;
1572 priv->absolute_mode = absolute_mode;
1573 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1574 priv->disable_gesture = true;
1575
1576 /*
1577 * Unfortunately ForcePad capability is not exported over PS/2,
1578 * so we have to resort to checking PNP IDs.
1579 */
1580 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1581
1582 err = synaptics_set_mode(psmouse);
1583 if (err) {
1584 psmouse_err(psmouse, "Unable to initialize device.\n");
1585 goto init_fail;
1586 }
1587
1588 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1589 SYN_NEWABS : SYN_OLDABS;
1590
1591 psmouse_info(psmouse,
1592 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1593 SYN_ID_MODEL(info->identity),
1594 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1595 info->model_id,
1596 info->capabilities, info->ext_cap, info->ext_cap_0c,
1597 info->ext_cap_10, info->board_id, info->firmware_id);
1598
1599 err = set_input_params(psmouse, priv);
1600 if (err) {
1601 psmouse_err(psmouse,
1602 "failed to set up capabilities: %d\n", err);
1603 goto init_fail;
1604 }
1605
1606 /*
1607 * Encode touchpad model so that it can be used to set
1608 * input device->id.version and be visible to userspace.
1609 * Because version is __u16 we have to drop something.
1610 * Hardware info bits seem to be good candidates as they
1611 * are documented to be for Synaptics corp. internal use.
1612 */
1613 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1614 (info->model_id & 0x000000ff);
1615
1616 if (absolute_mode) {
1617 psmouse->protocol_handler = synaptics_process_byte;
1618 psmouse->pktsize = 6;
1619 } else {
1620 /* Relative mode follows standard PS/2 mouse protocol */
1621 psmouse->protocol_handler = psmouse_process_byte;
1622 psmouse->pktsize = 3;
1623 }
1624
1625 psmouse->set_rate = synaptics_set_rate;
1626 psmouse->disconnect = synaptics_disconnect;
1627 psmouse->reconnect = synaptics_reconnect;
1628 psmouse->fast_reconnect = NULL;
1629 psmouse->cleanup = synaptics_reset;
1630 /* Synaptics can usually stay in sync without extra help */
1631 psmouse->resync_time = 0;
1632
1633 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1634 synaptics_pt_create(psmouse);
1635
1636 /*
1637 * Toshiba's KBC seems to have trouble handling data from
1638 * Synaptics at full rate. Switch to a lower rate (roughly
1639 * the same rate as a standard PS/2 mouse).
1640 */
1641 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1642 psmouse_info(psmouse,
1643 "Toshiba %s detected, limiting rate to 40pps.\n",
1644 dmi_get_system_info(DMI_PRODUCT_NAME));
1645 psmouse->rate = 40;
1646 }
1647
1648 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1649 err = device_create_file(&psmouse->ps2dev.serio->dev,
1650 &psmouse_attr_disable_gesture.dattr);
1651 if (err) {
1652 psmouse_err(psmouse,
1653 "Failed to create disable_gesture attribute (%d)",
1654 err);
1655 goto init_fail;
1656 }
1657 }
1658
1659 return 0;
1660
1661 init_fail:
1662 kfree(priv);
1663 return err;
1664 }
1665
__synaptics_init(struct psmouse * psmouse,bool absolute_mode)1666 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1667 {
1668 struct synaptics_device_info info;
1669 int error;
1670
1671 psmouse_reset(psmouse);
1672
1673 error = synaptics_query_hardware(psmouse, &info);
1674 if (error) {
1675 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1676 return error;
1677 }
1678
1679 return synaptics_init_ps2(psmouse, &info, absolute_mode);
1680 }
1681
synaptics_init_absolute(struct psmouse * psmouse)1682 int synaptics_init_absolute(struct psmouse *psmouse)
1683 {
1684 return __synaptics_init(psmouse, true);
1685 }
1686
synaptics_init_relative(struct psmouse * psmouse)1687 int synaptics_init_relative(struct psmouse *psmouse)
1688 {
1689 return __synaptics_init(psmouse, false);
1690 }
1691
synaptics_setup_ps2(struct psmouse * psmouse,struct synaptics_device_info * info)1692 static int synaptics_setup_ps2(struct psmouse *psmouse,
1693 struct synaptics_device_info *info)
1694 {
1695 bool absolute_mode = true;
1696 int error;
1697
1698 /*
1699 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1700 * packet spew overloads the EC such that key presses on the keyboard
1701 * are missed. Given that, don't even attempt to use Absolute mode.
1702 * Relative mode seems to work just fine.
1703 */
1704 if (broken_olpc_ec) {
1705 psmouse_info(psmouse,
1706 "OLPC XO detected, forcing relative protocol.\n");
1707 absolute_mode = false;
1708 }
1709
1710 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1711 if (error)
1712 return error;
1713
1714 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1715 }
1716
1717 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1718
synaptics_module_init(void)1719 void __init synaptics_module_init(void)
1720 {
1721 }
1722
1723 static int __maybe_unused
synaptics_setup_ps2(struct psmouse * psmouse,struct synaptics_device_info * info)1724 synaptics_setup_ps2(struct psmouse *psmouse,
1725 struct synaptics_device_info *info)
1726 {
1727 return -ENOSYS;
1728 }
1729
1730 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1731
1732 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1733
1734 /*
1735 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1736 * provides a better bandwidth and allow a better control of the touchpads.
1737 * This is used to decide if we need to use this bus or not.
1738 */
1739 enum {
1740 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1741 SYNAPTICS_INTERTOUCH_OFF,
1742 SYNAPTICS_INTERTOUCH_ON,
1743 };
1744
1745 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1746 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1747 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1748 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1749
synaptics_create_intertouch(struct psmouse * psmouse,struct synaptics_device_info * info,bool leave_breadcrumbs)1750 static int synaptics_create_intertouch(struct psmouse *psmouse,
1751 struct synaptics_device_info *info,
1752 bool leave_breadcrumbs)
1753 {
1754 bool topbuttonpad =
1755 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1756 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1757 const struct rmi_device_platform_data pdata = {
1758 .reset_delay_ms = 30,
1759 .sensor_pdata = {
1760 .sensor_type = rmi_sensor_touchpad,
1761 .axis_align.flip_y = true,
1762 .kernel_tracking = false,
1763 .topbuttonpad = topbuttonpad,
1764 },
1765 .gpio_data = {
1766 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1767 .trackstick_buttons =
1768 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1769 },
1770 };
1771 const struct i2c_board_info intertouch_board = {
1772 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1773 .flags = I2C_CLIENT_HOST_NOTIFY,
1774 };
1775
1776 return psmouse_smbus_init(psmouse, &intertouch_board,
1777 &pdata, sizeof(pdata), true,
1778 leave_breadcrumbs);
1779 }
1780
1781 /*
1782 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1783 * and decides to instantiate a SMBus InterTouch device.
1784 */
synaptics_setup_intertouch(struct psmouse * psmouse,struct synaptics_device_info * info,bool leave_breadcrumbs)1785 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1786 struct synaptics_device_info *info,
1787 bool leave_breadcrumbs)
1788 {
1789 int error;
1790
1791 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1792 return -ENXIO;
1793
1794 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1795 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1796 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1797
1798 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1799 psmouse_info(psmouse,
1800 "Your touchpad (%s) says it can support a different bus. "
1801 "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",
1802 psmouse->ps2dev.serio->firmware_id);
1803
1804 return -ENXIO;
1805 }
1806 }
1807
1808 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1809
1810 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1811 if (error) {
1812 if (error == -EAGAIN)
1813 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1814 else
1815 psmouse_err(psmouse, "unable to create intertouch device\n");
1816
1817 return error;
1818 }
1819
1820 return 0;
1821 }
1822
synaptics_init_smbus(struct psmouse * psmouse)1823 int synaptics_init_smbus(struct psmouse *psmouse)
1824 {
1825 struct synaptics_device_info info;
1826 int error;
1827
1828 psmouse_reset(psmouse);
1829
1830 error = synaptics_query_hardware(psmouse, &info);
1831 if (error) {
1832 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1833 return error;
1834 }
1835
1836 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1837 return -ENXIO;
1838
1839 return synaptics_create_intertouch(psmouse, &info, false);
1840 }
1841
1842 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1843
1844 static int __maybe_unused
synaptics_setup_intertouch(struct psmouse * psmouse,struct synaptics_device_info * info,bool leave_breadcrumbs)1845 synaptics_setup_intertouch(struct psmouse *psmouse,
1846 struct synaptics_device_info *info,
1847 bool leave_breadcrumbs)
1848 {
1849 return -ENOSYS;
1850 }
1851
synaptics_init_smbus(struct psmouse * psmouse)1852 int synaptics_init_smbus(struct psmouse *psmouse)
1853 {
1854 return -ENOSYS;
1855 }
1856
1857 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1858
1859 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1860 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1861
synaptics_init(struct psmouse * psmouse)1862 int synaptics_init(struct psmouse *psmouse)
1863 {
1864 struct synaptics_device_info info;
1865 int error;
1866 int retval;
1867
1868 psmouse_reset(psmouse);
1869
1870 error = synaptics_query_hardware(psmouse, &info);
1871 if (error) {
1872 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1873 return error;
1874 }
1875
1876 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1877 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1878 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1879 /* Forcepads need F21, which is not ready */
1880 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1881 psmouse_warn(psmouse,
1882 "The touchpad can support a better bus than the too old PS/2 protocol. "
1883 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1884 }
1885
1886 error = synaptics_setup_intertouch(psmouse, &info, true);
1887 if (!error)
1888 return PSMOUSE_SYNAPTICS_SMBUS;
1889 }
1890
1891 retval = synaptics_setup_ps2(psmouse, &info);
1892 if (retval < 0) {
1893 /*
1894 * Not using any flavor of Synaptics support, so clean up
1895 * SMbus breadcrumbs, if any.
1896 */
1897 psmouse_smbus_cleanup(psmouse);
1898 }
1899
1900 return retval;
1901 }
1902
1903 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1904
synaptics_init(struct psmouse * psmouse)1905 int synaptics_init(struct psmouse *psmouse)
1906 {
1907 return -ENOSYS;
1908 }
1909
1910 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1911