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_pt_open(struct serio * serio)670 static int synaptics_pt_open(struct serio *serio)
671 {
672 struct psmouse *parent = psmouse_from_serio(serio->parent);
673 struct synaptics_data *priv = parent->private;
674
675 guard(serio_pause_rx)(parent->ps2dev.serio);
676 priv->pt_port_open = true;
677
678 return 0;
679 }
680
synaptics_pt_close(struct serio * serio)681 static void synaptics_pt_close(struct serio *serio)
682 {
683 struct psmouse *parent = psmouse_from_serio(serio->parent);
684 struct synaptics_data *priv = parent->private;
685
686 guard(serio_pause_rx)(parent->ps2dev.serio);
687 priv->pt_port_open = false;
688 }
689
synaptics_is_pt_packet(u8 * buf)690 static int synaptics_is_pt_packet(u8 *buf)
691 {
692 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
693 }
694
synaptics_pass_pt_packet(struct synaptics_data * priv,u8 * packet)695 static void synaptics_pass_pt_packet(struct synaptics_data *priv, u8 *packet)
696 {
697 struct serio *ptport;
698
699 ptport = priv->pt_port;
700 if (!ptport)
701 return;
702
703 serio_interrupt(ptport, packet[1], 0);
704
705 if (priv->pt_port_open) {
706 struct psmouse *child = psmouse_from_serio(ptport);
707
708 if (child->state == PSMOUSE_ACTIVATED) {
709 serio_interrupt(ptport, packet[4], 0);
710 serio_interrupt(ptport, packet[5], 0);
711 if (child->pktsize == 4)
712 serio_interrupt(ptport, packet[2], 0);
713 }
714 }
715 }
716
synaptics_pt_activate(struct psmouse * psmouse)717 static void synaptics_pt_activate(struct psmouse *psmouse)
718 {
719 struct synaptics_data *priv = psmouse->private;
720 struct psmouse *child = psmouse_from_serio(priv->pt_port);
721
722 /* adjust the touchpad to child's choice of protocol */
723 if (child) {
724 if (child->pktsize == 4)
725 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
726 else
727 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
728
729 if (synaptics_mode_cmd(psmouse, priv->mode))
730 psmouse_warn(psmouse,
731 "failed to switch guest protocol\n");
732 }
733 }
734
synaptics_pt_create(struct psmouse * psmouse)735 static void synaptics_pt_create(struct psmouse *psmouse)
736 {
737 struct serio *serio;
738
739 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
740 if (!serio) {
741 psmouse_err(psmouse,
742 "not enough memory for pass-through port\n");
743 return;
744 }
745
746 serio->id.type = SERIO_PS_PSTHRU;
747 strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
748 strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
749 serio->write = synaptics_pt_write;
750 serio->start = synaptics_pt_start;
751 serio->stop = synaptics_pt_stop;
752 serio->open = synaptics_pt_open;
753 serio->close = synaptics_pt_close;
754 serio->parent = psmouse->ps2dev.serio;
755
756 psmouse->pt_activate = synaptics_pt_activate;
757
758 psmouse_info(psmouse, "serio: %s port at %s\n",
759 serio->name, psmouse->phys);
760 serio_register_port(serio);
761 }
762
763 /*****************************************************************************
764 * Functions to interpret the absolute mode packets
765 ****************************************************************************/
766
synaptics_parse_agm(const u8 buf[],struct synaptics_data * priv,struct synaptics_hw_state * hw)767 static void synaptics_parse_agm(const u8 buf[],
768 struct synaptics_data *priv,
769 struct synaptics_hw_state *hw)
770 {
771 struct synaptics_hw_state *agm = &priv->agm;
772 int agm_packet_type;
773
774 agm_packet_type = (buf[5] & 0x30) >> 4;
775 switch (agm_packet_type) {
776 case 1:
777 /* Gesture packet: (x, y, z) half resolution */
778 agm->w = hw->w;
779 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
780 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
781 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
782 break;
783
784 case 2:
785 /* AGM-CONTACT packet: we are only interested in the count */
786 priv->agm_count = buf[1];
787 break;
788
789 default:
790 break;
791 }
792 }
793
synaptics_parse_ext_buttons(const u8 buf[],struct synaptics_data * priv,struct synaptics_hw_state * hw)794 static void synaptics_parse_ext_buttons(const u8 buf[],
795 struct synaptics_data *priv,
796 struct synaptics_hw_state *hw)
797 {
798 unsigned int ext_bits =
799 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
800 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
801
802 hw->ext_buttons = buf[4] & ext_mask;
803 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
804 }
805
synaptics_parse_hw_state(const u8 buf[],struct synaptics_data * priv,struct synaptics_hw_state * hw)806 static int synaptics_parse_hw_state(const u8 buf[],
807 struct synaptics_data *priv,
808 struct synaptics_hw_state *hw)
809 {
810 memset(hw, 0, sizeof(struct synaptics_hw_state));
811
812 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
813 hw->w = (((buf[0] & 0x30) >> 2) |
814 ((buf[0] & 0x04) >> 1) |
815 ((buf[3] & 0x04) >> 2));
816
817 if (synaptics_has_agm(priv) && hw->w == 2) {
818 synaptics_parse_agm(buf, priv, hw);
819 return 1;
820 }
821
822 hw->x = (((buf[3] & 0x10) << 8) |
823 ((buf[1] & 0x0f) << 8) |
824 buf[4]);
825 hw->y = (((buf[3] & 0x20) << 7) |
826 ((buf[1] & 0xf0) << 4) |
827 buf[5]);
828 hw->z = buf[2];
829
830 hw->left = (buf[0] & 0x01) ? 1 : 0;
831 hw->right = (buf[0] & 0x02) ? 1 : 0;
832
833 if (priv->is_forcepad) {
834 /*
835 * ForcePads, like Clickpads, use middle button
836 * bits to report primary button clicks.
837 * Unfortunately they report primary button not
838 * only when user presses on the pad above certain
839 * threshold, but also when there are more than one
840 * finger on the touchpad, which interferes with
841 * out multi-finger gestures.
842 */
843 if (hw->z == 0) {
844 /* No contacts */
845 priv->press = priv->report_press = false;
846 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
847 /*
848 * Single-finger touch with pressure above
849 * the threshold. If pressure stays long
850 * enough, we'll start reporting primary
851 * button. We rely on the device continuing
852 * sending data even if finger does not
853 * move.
854 */
855 if (!priv->press) {
856 priv->press_start = jiffies;
857 priv->press = true;
858 } else if (time_after(jiffies,
859 priv->press_start +
860 msecs_to_jiffies(50))) {
861 priv->report_press = true;
862 }
863 } else {
864 priv->press = false;
865 }
866
867 hw->left = priv->report_press;
868
869 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
870 /*
871 * Clickpad's button is transmitted as middle button,
872 * however, since it is primary button, we will report
873 * it as BTN_LEFT.
874 */
875 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
876
877 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
878 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
879 if (hw->w == 2)
880 hw->scroll = (s8)buf[1];
881 }
882
883 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
884 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
885 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
886 }
887
888 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
889 ((buf[0] ^ buf[3]) & 0x02)) {
890 synaptics_parse_ext_buttons(buf, priv, hw);
891 }
892 } else {
893 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
894 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
895
896 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
897 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
898
899 hw->left = (buf[0] & 0x01) ? 1 : 0;
900 hw->right = (buf[0] & 0x02) ? 1 : 0;
901 }
902
903 /*
904 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
905 * is used by some firmware to indicate a finger at the edge of
906 * the touchpad whose precise position cannot be determined, so
907 * convert these values to the maximum axis value.
908 */
909 if (hw->x > X_MAX_POSITIVE)
910 hw->x -= 1 << ABS_POS_BITS;
911 else if (hw->x == X_MAX_POSITIVE)
912 hw->x = XMAX;
913
914 if (hw->y > Y_MAX_POSITIVE)
915 hw->y -= 1 << ABS_POS_BITS;
916 else if (hw->y == Y_MAX_POSITIVE)
917 hw->y = YMAX;
918
919 return 0;
920 }
921
synaptics_report_semi_mt_slot(struct input_dev * dev,int slot,bool active,int x,int y)922 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
923 bool active, int x, int y)
924 {
925 input_mt_slot(dev, slot);
926 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
927 if (active) {
928 input_report_abs(dev, ABS_MT_POSITION_X, x);
929 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
930 }
931 }
932
synaptics_report_semi_mt_data(struct input_dev * dev,const struct synaptics_hw_state * a,const struct synaptics_hw_state * b,int num_fingers)933 static void synaptics_report_semi_mt_data(struct input_dev *dev,
934 const struct synaptics_hw_state *a,
935 const struct synaptics_hw_state *b,
936 int num_fingers)
937 {
938 if (num_fingers >= 2) {
939 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
940 min(a->y, b->y));
941 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
942 max(a->y, b->y));
943 } else if (num_fingers == 1) {
944 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
945 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
946 } else {
947 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
948 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
949 }
950 }
951
synaptics_report_ext_buttons(struct psmouse * psmouse,const struct synaptics_hw_state * hw)952 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
953 const struct synaptics_hw_state *hw)
954 {
955 struct input_dev *dev = psmouse->dev;
956 struct synaptics_data *priv = psmouse->private;
957 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
958 int i;
959
960 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
961 return;
962
963 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
964 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
965 SYN_ID_FULL(priv->info.identity) == 0x802) &&
966 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
967 return;
968
969 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
970 for (i = 0; i < ext_bits; i++) {
971 input_report_key(dev, BTN_0 + 2 * i,
972 hw->ext_buttons & BIT(i));
973 input_report_key(dev, BTN_1 + 2 * i,
974 hw->ext_buttons & BIT(i + ext_bits));
975 }
976 return;
977 }
978
979 /*
980 * This generation of touchpads has the trackstick buttons
981 * physically wired to the touchpad. Re-route them through
982 * the pass-through interface.
983 */
984 if (priv->pt_port) {
985 u8 pt_buttons;
986
987 /* The trackstick expects at most 3 buttons */
988 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
989 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
990 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
991
992 serio_interrupt(priv->pt_port,
993 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
994 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
995 }
996 }
997
synaptics_report_buttons(struct psmouse * psmouse,const struct synaptics_hw_state * hw)998 static void synaptics_report_buttons(struct psmouse *psmouse,
999 const struct synaptics_hw_state *hw)
1000 {
1001 struct input_dev *dev = psmouse->dev;
1002 struct synaptics_data *priv = psmouse->private;
1003
1004 input_report_key(dev, BTN_LEFT, hw->left);
1005 input_report_key(dev, BTN_RIGHT, hw->right);
1006
1007 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
1008 input_report_key(dev, BTN_MIDDLE, hw->middle);
1009
1010 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
1011 input_report_key(dev, BTN_FORWARD, hw->up);
1012 input_report_key(dev, BTN_BACK, hw->down);
1013 }
1014
1015 synaptics_report_ext_buttons(psmouse, hw);
1016 }
1017
synaptics_report_mt_data(struct psmouse * psmouse,const struct synaptics_hw_state * sgm,int num_fingers)1018 static void synaptics_report_mt_data(struct psmouse *psmouse,
1019 const struct synaptics_hw_state *sgm,
1020 int num_fingers)
1021 {
1022 struct input_dev *dev = psmouse->dev;
1023 struct synaptics_data *priv = psmouse->private;
1024 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1025 struct input_mt_pos pos[2];
1026 int slot[2], nsemi, i;
1027
1028 nsemi = clamp_val(num_fingers, 0, 2);
1029
1030 for (i = 0; i < nsemi; i++) {
1031 pos[i].x = hw[i]->x;
1032 pos[i].y = synaptics_invert_y(hw[i]->y);
1033 }
1034
1035 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1036
1037 for (i = 0; i < nsemi; i++) {
1038 input_mt_slot(dev, slot[i]);
1039 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1040 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1041 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1042 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1043 }
1044
1045 input_mt_drop_unused(dev);
1046
1047 /* Don't use active slot count to generate BTN_TOOL events. */
1048 input_mt_report_pointer_emulation(dev, false);
1049
1050 /* Send the number of fingers reported by touchpad itself. */
1051 input_mt_report_finger_count(dev, num_fingers);
1052
1053 synaptics_report_buttons(psmouse, sgm);
1054
1055 input_sync(dev);
1056 }
1057
synaptics_image_sensor_process(struct psmouse * psmouse,struct synaptics_hw_state * sgm)1058 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1059 struct synaptics_hw_state *sgm)
1060 {
1061 struct synaptics_data *priv = psmouse->private;
1062 int num_fingers;
1063
1064 /*
1065 * Update mt_state using the new finger count and current mt_state.
1066 */
1067 if (sgm->z == 0)
1068 num_fingers = 0;
1069 else if (sgm->w >= 4)
1070 num_fingers = 1;
1071 else if (sgm->w == 0)
1072 num_fingers = 2;
1073 else if (sgm->w == 1)
1074 num_fingers = priv->agm_count ? priv->agm_count : 3;
1075 else
1076 num_fingers = 4;
1077
1078 /* Send resulting input events to user space */
1079 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1080 }
1081
synaptics_has_multifinger(struct synaptics_data * priv)1082 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1083 {
1084 if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1085 return true;
1086
1087 /* Advanced gesture mode also sends multi finger data */
1088 return synaptics_has_agm(priv);
1089 }
1090
1091 /*
1092 * called for each full received packet from the touchpad
1093 */
synaptics_process_packet(struct psmouse * psmouse)1094 static void synaptics_process_packet(struct psmouse *psmouse)
1095 {
1096 struct input_dev *dev = psmouse->dev;
1097 struct synaptics_data *priv = psmouse->private;
1098 struct synaptics_device_info *info = &priv->info;
1099 struct synaptics_hw_state hw;
1100 int num_fingers;
1101 int finger_width;
1102
1103 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1104 return;
1105
1106 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1107 synaptics_image_sensor_process(psmouse, &hw);
1108 return;
1109 }
1110
1111 if (hw.scroll) {
1112 priv->scroll += hw.scroll;
1113
1114 while (priv->scroll >= 4) {
1115 input_report_key(dev, BTN_BACK, !hw.down);
1116 input_sync(dev);
1117 input_report_key(dev, BTN_BACK, hw.down);
1118 input_sync(dev);
1119 priv->scroll -= 4;
1120 }
1121 while (priv->scroll <= -4) {
1122 input_report_key(dev, BTN_FORWARD, !hw.up);
1123 input_sync(dev);
1124 input_report_key(dev, BTN_FORWARD, hw.up);
1125 input_sync(dev);
1126 priv->scroll += 4;
1127 }
1128 return;
1129 }
1130
1131 if (hw.z > 0 && hw.x > 1) {
1132 num_fingers = 1;
1133 finger_width = 5;
1134 if (SYN_CAP_EXTENDED(info->capabilities)) {
1135 switch (hw.w) {
1136 case 0 ... 1:
1137 if (synaptics_has_multifinger(priv))
1138 num_fingers = hw.w + 2;
1139 break;
1140 case 2:
1141 /*
1142 * SYN_MODEL_PEN(info->model_id): even if
1143 * the device supports pen, we treat it as
1144 * a single finger.
1145 */
1146 break;
1147 case 4 ... 15:
1148 if (SYN_CAP_PALMDETECT(info->capabilities))
1149 finger_width = hw.w;
1150 break;
1151 }
1152 }
1153 } else {
1154 num_fingers = 0;
1155 finger_width = 0;
1156 }
1157
1158 if (cr48_profile_sensor) {
1159 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1160 return;
1161 }
1162
1163 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1164 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1165 num_fingers);
1166
1167 /* Post events
1168 * BTN_TOUCH has to be first as mousedev relies on it when doing
1169 * absolute -> relative conversion
1170 */
1171 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1172 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1173
1174 if (num_fingers > 0) {
1175 input_report_abs(dev, ABS_X, hw.x);
1176 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1177 }
1178 input_report_abs(dev, ABS_PRESSURE, hw.z);
1179
1180 if (SYN_CAP_PALMDETECT(info->capabilities))
1181 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1182
1183 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1184 if (synaptics_has_multifinger(priv)) {
1185 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1186 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1187 }
1188
1189 synaptics_report_buttons(psmouse, &hw);
1190
1191 input_sync(dev);
1192 }
1193
synaptics_validate_byte(struct psmouse * psmouse,int idx,enum synaptics_pkt_type pkt_type)1194 static bool synaptics_validate_byte(struct psmouse *psmouse,
1195 int idx, enum synaptics_pkt_type pkt_type)
1196 {
1197 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1198 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1199 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1200 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1201 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1202 const u8 *packet = psmouse->packet;
1203
1204 if (idx < 0 || idx > 4)
1205 return false;
1206
1207 switch (pkt_type) {
1208
1209 case SYN_NEWABS:
1210 case SYN_NEWABS_RELAXED:
1211 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1212
1213 case SYN_NEWABS_STRICT:
1214 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1215
1216 case SYN_OLDABS:
1217 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1218
1219 default:
1220 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1221 return false;
1222 }
1223 }
1224
1225 static enum synaptics_pkt_type
synaptics_detect_pkt_type(struct psmouse * psmouse)1226 synaptics_detect_pkt_type(struct psmouse *psmouse)
1227 {
1228 int i;
1229
1230 for (i = 0; i < 5; i++) {
1231 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1232 psmouse_info(psmouse, "using relaxed packet validation\n");
1233 return SYN_NEWABS_RELAXED;
1234 }
1235 }
1236
1237 return SYN_NEWABS_STRICT;
1238 }
1239
synaptics_process_byte(struct psmouse * psmouse)1240 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1241 {
1242 struct synaptics_data *priv = psmouse->private;
1243
1244 if (psmouse->pktcnt >= 6) { /* Full packet received */
1245 if (unlikely(priv->pkt_type == SYN_NEWABS))
1246 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1247
1248 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1249 synaptics_is_pt_packet(psmouse->packet)) {
1250 synaptics_pass_pt_packet(priv, psmouse->packet);
1251 } else {
1252 synaptics_process_packet(psmouse);
1253 }
1254
1255 return PSMOUSE_FULL_PACKET;
1256 }
1257
1258 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1259 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1260 }
1261
1262 /*****************************************************************************
1263 * Driver initialization/cleanup functions
1264 ****************************************************************************/
set_abs_position_params(struct input_dev * dev,struct synaptics_device_info * info,int x_code,int y_code)1265 static void set_abs_position_params(struct input_dev *dev,
1266 struct synaptics_device_info *info,
1267 int x_code, int y_code)
1268 {
1269 int x_min = info->x_min ?: XMIN_NOMINAL;
1270 int x_max = info->x_max ?: XMAX_NOMINAL;
1271 int y_min = info->y_min ?: YMIN_NOMINAL;
1272 int y_max = info->y_max ?: YMAX_NOMINAL;
1273 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1274 SYN_REDUCED_FILTER_FUZZ : 0;
1275
1276 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1277 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1278 input_abs_set_res(dev, x_code, info->x_res);
1279 input_abs_set_res(dev, y_code, info->y_res);
1280 }
1281
set_input_params(struct psmouse * psmouse,struct synaptics_data * priv)1282 static int set_input_params(struct psmouse *psmouse,
1283 struct synaptics_data *priv)
1284 {
1285 struct input_dev *dev = psmouse->dev;
1286 struct synaptics_device_info *info = &priv->info;
1287 int i;
1288 int error;
1289
1290 /* Reset default psmouse capabilities */
1291 __clear_bit(EV_REL, dev->evbit);
1292 bitmap_zero(dev->relbit, REL_CNT);
1293 bitmap_zero(dev->keybit, KEY_CNT);
1294
1295 /* Things that apply to both modes */
1296 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1297
1298 input_set_capability(dev, EV_KEY, BTN_LEFT);
1299
1300 /* Clickpads report only left button */
1301 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1302 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1303 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1304 input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1305 }
1306
1307 if (!priv->absolute_mode) {
1308 /* Relative mode */
1309 input_set_capability(dev, EV_REL, REL_X);
1310 input_set_capability(dev, EV_REL, REL_Y);
1311 return 0;
1312 }
1313
1314 /* Absolute mode */
1315 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1316 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1317
1318 if (cr48_profile_sensor)
1319 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1320
1321 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1322 set_abs_position_params(dev, info,
1323 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1324 /* Image sensors can report per-contact pressure */
1325 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1326
1327 error = input_mt_init_slots(dev, 2,
1328 INPUT_MT_POINTER | INPUT_MT_TRACK);
1329 if (error)
1330 return error;
1331
1332 /* Image sensors can signal 4 and 5 finger clicks */
1333 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1334 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1335 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1336 set_abs_position_params(dev, info,
1337 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1338 /*
1339 * Profile sensor in CR-48 tracks contacts reasonably well,
1340 * other non-image sensors with AGM use semi-mt.
1341 */
1342 error = input_mt_init_slots(dev, 2,
1343 INPUT_MT_POINTER |
1344 (cr48_profile_sensor ?
1345 INPUT_MT_TRACK :
1346 INPUT_MT_SEMI_MT));
1347 if (error)
1348 return error;
1349
1350 /*
1351 * For semi-mt devices we send ABS_X/Y ourselves instead of
1352 * input_mt_report_pointer_emulation. But
1353 * input_mt_init_slots() resets the fuzz to 0, leading to a
1354 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1355 * position. Let's re-initialize ABS_X/Y here.
1356 */
1357 if (!cr48_profile_sensor)
1358 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1359 }
1360
1361 if (SYN_CAP_PALMDETECT(info->capabilities))
1362 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1363
1364 input_set_capability(dev, EV_KEY, BTN_TOUCH);
1365 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1366
1367 if (synaptics_has_multifinger(priv)) {
1368 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1369 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1370 }
1371
1372 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1373 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1374 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1375 input_set_capability(dev, EV_KEY, BTN_BACK);
1376 }
1377
1378 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1379 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1380 input_set_capability(dev, EV_KEY, BTN_0 + i);
1381
1382 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1383 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1384 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1385 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1386 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1387 }
1388
1389 return 0;
1390 }
1391
synaptics_show_disable_gesture(struct psmouse * psmouse,void * data,char * buf)1392 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1393 void *data, char *buf)
1394 {
1395 struct synaptics_data *priv = psmouse->private;
1396
1397 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1398 }
1399
synaptics_set_disable_gesture(struct psmouse * psmouse,void * data,const char * buf,size_t len)1400 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1401 void *data, const char *buf,
1402 size_t len)
1403 {
1404 struct synaptics_data *priv = psmouse->private;
1405 unsigned int value;
1406 int err;
1407
1408 err = kstrtouint(buf, 10, &value);
1409 if (err)
1410 return err;
1411
1412 if (value > 1)
1413 return -EINVAL;
1414
1415 if (value == priv->disable_gesture)
1416 return len;
1417
1418 priv->disable_gesture = value;
1419 if (value)
1420 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1421 else
1422 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1423
1424 if (synaptics_mode_cmd(psmouse, priv->mode))
1425 return -EIO;
1426
1427 return len;
1428 }
1429
1430 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1431 synaptics_show_disable_gesture,
1432 synaptics_set_disable_gesture);
1433
synaptics_disconnect(struct psmouse * psmouse)1434 static void synaptics_disconnect(struct psmouse *psmouse)
1435 {
1436 struct synaptics_data *priv = psmouse->private;
1437
1438 /*
1439 * We might have left a breadcrumb when trying to
1440 * set up SMbus companion.
1441 */
1442 psmouse_smbus_cleanup(psmouse);
1443
1444 if (!priv->absolute_mode &&
1445 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1446 device_remove_file(&psmouse->ps2dev.serio->dev,
1447 &psmouse_attr_disable_gesture.dattr);
1448
1449 synaptics_reset(psmouse);
1450 kfree(priv);
1451 psmouse->private = NULL;
1452 }
1453
synaptics_reconnect(struct psmouse * psmouse)1454 static int synaptics_reconnect(struct psmouse *psmouse)
1455 {
1456 struct synaptics_data *priv = psmouse->private;
1457 struct synaptics_device_info info;
1458 u8 param[2];
1459 int retry = 0;
1460 int error;
1461
1462 do {
1463 psmouse_reset(psmouse);
1464 if (retry) {
1465 /*
1466 * On some boxes, right after resuming, the touchpad
1467 * needs some time to finish initializing (I assume
1468 * it needs time to calibrate) and start responding
1469 * to Synaptics-specific queries, so let's wait a
1470 * bit.
1471 */
1472 ssleep(1);
1473 }
1474 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1475 error = synaptics_detect(psmouse, 0);
1476 } while (error && ++retry < 3);
1477
1478 if (error)
1479 return error;
1480
1481 if (retry > 1)
1482 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1483
1484 error = synaptics_query_hardware(psmouse, &info);
1485 if (error) {
1486 psmouse_err(psmouse, "Unable to query device.\n");
1487 return error;
1488 }
1489
1490 error = synaptics_set_mode(psmouse);
1491 if (error) {
1492 psmouse_err(psmouse, "Unable to initialize device.\n");
1493 return error;
1494 }
1495
1496 if (info.identity != priv->info.identity ||
1497 info.model_id != priv->info.model_id ||
1498 info.capabilities != priv->info.capabilities ||
1499 info.ext_cap != priv->info.ext_cap) {
1500 psmouse_err(psmouse,
1501 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1502 priv->info.identity, info.identity,
1503 priv->info.model_id, info.model_id,
1504 priv->info.capabilities, info.capabilities,
1505 priv->info.ext_cap, info.ext_cap);
1506 return -ENXIO;
1507 }
1508
1509 return 0;
1510 }
1511
1512 static bool impaired_toshiba_kbc;
1513
1514 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1515 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1516 {
1517 /* Toshiba Satellite */
1518 .matches = {
1519 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1520 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1521 },
1522 },
1523 {
1524 /* Toshiba Dynabook */
1525 .matches = {
1526 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1527 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1528 },
1529 },
1530 {
1531 /* Toshiba Portege M300 */
1532 .matches = {
1533 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1534 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1535 },
1536
1537 },
1538 {
1539 /* Toshiba Portege M300 */
1540 .matches = {
1541 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1542 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1543 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1544 },
1545
1546 },
1547 #endif
1548 { }
1549 };
1550
1551 static bool broken_olpc_ec;
1552
1553 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1554 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1555 {
1556 /* OLPC XO-1 or XO-1.5 */
1557 .matches = {
1558 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1559 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1560 },
1561 },
1562 #endif
1563 { }
1564 };
1565
1566 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1567 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1568 {
1569 /* Cr-48 Chromebook (Codename Mario) */
1570 .matches = {
1571 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1572 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1573 },
1574 },
1575 #endif
1576 { }
1577 };
1578
synaptics_module_init(void)1579 void __init synaptics_module_init(void)
1580 {
1581 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1582 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1583 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1584 }
1585
synaptics_init_ps2(struct psmouse * psmouse,struct synaptics_device_info * info,bool absolute_mode)1586 static int synaptics_init_ps2(struct psmouse *psmouse,
1587 struct synaptics_device_info *info,
1588 bool absolute_mode)
1589 {
1590 struct synaptics_data *priv;
1591 int err;
1592
1593 synaptics_apply_quirks(psmouse, info);
1594
1595 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1596 if (!priv)
1597 return -ENOMEM;
1598
1599 priv->info = *info;
1600 priv->absolute_mode = absolute_mode;
1601 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1602 priv->disable_gesture = true;
1603
1604 /*
1605 * Unfortunately ForcePad capability is not exported over PS/2,
1606 * so we have to resort to checking PNP IDs.
1607 */
1608 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1609
1610 err = synaptics_set_mode(psmouse);
1611 if (err) {
1612 psmouse_err(psmouse, "Unable to initialize device.\n");
1613 goto init_fail;
1614 }
1615
1616 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1617 SYN_NEWABS : SYN_OLDABS;
1618
1619 psmouse_info(psmouse,
1620 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1621 SYN_ID_MODEL(info->identity),
1622 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1623 info->model_id,
1624 info->capabilities, info->ext_cap, info->ext_cap_0c,
1625 info->ext_cap_10, info->board_id, info->firmware_id);
1626
1627 err = set_input_params(psmouse, priv);
1628 if (err) {
1629 psmouse_err(psmouse,
1630 "failed to set up capabilities: %d\n", err);
1631 goto init_fail;
1632 }
1633
1634 /*
1635 * Encode touchpad model so that it can be used to set
1636 * input device->id.version and be visible to userspace.
1637 * Because version is __u16 we have to drop something.
1638 * Hardware info bits seem to be good candidates as they
1639 * are documented to be for Synaptics corp. internal use.
1640 */
1641 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1642 (info->model_id & 0x000000ff);
1643
1644 if (absolute_mode) {
1645 psmouse->protocol_handler = synaptics_process_byte;
1646 psmouse->pktsize = 6;
1647 } else {
1648 /* Relative mode follows standard PS/2 mouse protocol */
1649 psmouse->protocol_handler = psmouse_process_byte;
1650 psmouse->pktsize = 3;
1651 }
1652
1653 psmouse->set_rate = synaptics_set_rate;
1654 psmouse->disconnect = synaptics_disconnect;
1655 psmouse->reconnect = synaptics_reconnect;
1656 psmouse->fast_reconnect = NULL;
1657 psmouse->cleanup = synaptics_reset;
1658 /* Synaptics can usually stay in sync without extra help */
1659 psmouse->resync_time = 0;
1660
1661 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1662 synaptics_pt_create(psmouse);
1663
1664 /*
1665 * Toshiba's KBC seems to have trouble handling data from
1666 * Synaptics at full rate. Switch to a lower rate (roughly
1667 * the same rate as a standard PS/2 mouse).
1668 */
1669 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1670 psmouse_info(psmouse,
1671 "Toshiba %s detected, limiting rate to 40pps.\n",
1672 dmi_get_system_info(DMI_PRODUCT_NAME));
1673 psmouse->rate = 40;
1674 }
1675
1676 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1677 err = device_create_file(&psmouse->ps2dev.serio->dev,
1678 &psmouse_attr_disable_gesture.dattr);
1679 if (err) {
1680 psmouse_err(psmouse,
1681 "Failed to create disable_gesture attribute (%d)",
1682 err);
1683 goto init_fail;
1684 }
1685 }
1686
1687 return 0;
1688
1689 init_fail:
1690 kfree(priv);
1691 return err;
1692 }
1693
__synaptics_init(struct psmouse * psmouse,bool absolute_mode)1694 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1695 {
1696 struct synaptics_device_info info;
1697 int error;
1698
1699 psmouse_reset(psmouse);
1700
1701 error = synaptics_query_hardware(psmouse, &info);
1702 if (error) {
1703 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1704 return error;
1705 }
1706
1707 return synaptics_init_ps2(psmouse, &info, absolute_mode);
1708 }
1709
synaptics_init_absolute(struct psmouse * psmouse)1710 int synaptics_init_absolute(struct psmouse *psmouse)
1711 {
1712 return __synaptics_init(psmouse, true);
1713 }
1714
synaptics_init_relative(struct psmouse * psmouse)1715 int synaptics_init_relative(struct psmouse *psmouse)
1716 {
1717 return __synaptics_init(psmouse, false);
1718 }
1719
synaptics_setup_ps2(struct psmouse * psmouse,struct synaptics_device_info * info)1720 static int synaptics_setup_ps2(struct psmouse *psmouse,
1721 struct synaptics_device_info *info)
1722 {
1723 bool absolute_mode = true;
1724 int error;
1725
1726 /*
1727 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1728 * packet spew overloads the EC such that key presses on the keyboard
1729 * are missed. Given that, don't even attempt to use Absolute mode.
1730 * Relative mode seems to work just fine.
1731 */
1732 if (broken_olpc_ec) {
1733 psmouse_info(psmouse,
1734 "OLPC XO detected, forcing relative protocol.\n");
1735 absolute_mode = false;
1736 }
1737
1738 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1739 if (error)
1740 return error;
1741
1742 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1743 }
1744
1745 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1746
synaptics_module_init(void)1747 void __init synaptics_module_init(void)
1748 {
1749 }
1750
1751 static int __maybe_unused
synaptics_setup_ps2(struct psmouse * psmouse,struct synaptics_device_info * info)1752 synaptics_setup_ps2(struct psmouse *psmouse,
1753 struct synaptics_device_info *info)
1754 {
1755 return -ENOSYS;
1756 }
1757
1758 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1759
1760 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1761
1762 /*
1763 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1764 * provides a better bandwidth and allow a better control of the touchpads.
1765 * This is used to decide if we need to use this bus or not.
1766 */
1767 enum {
1768 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1769 SYNAPTICS_INTERTOUCH_OFF,
1770 SYNAPTICS_INTERTOUCH_ON,
1771 };
1772
1773 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1774 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1775 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1776 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1777
synaptics_create_intertouch(struct psmouse * psmouse,struct synaptics_device_info * info,bool leave_breadcrumbs)1778 static int synaptics_create_intertouch(struct psmouse *psmouse,
1779 struct synaptics_device_info *info,
1780 bool leave_breadcrumbs)
1781 {
1782 bool topbuttonpad =
1783 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1784 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1785 const struct rmi_device_platform_data pdata = {
1786 .reset_delay_ms = 30,
1787 .sensor_pdata = {
1788 .sensor_type = rmi_sensor_touchpad,
1789 .axis_align.flip_y = true,
1790 .kernel_tracking = false,
1791 .topbuttonpad = topbuttonpad,
1792 },
1793 .gpio_data = {
1794 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1795 .trackstick_buttons =
1796 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1797 },
1798 };
1799 const struct i2c_board_info intertouch_board = {
1800 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1801 .flags = I2C_CLIENT_HOST_NOTIFY,
1802 };
1803
1804 return psmouse_smbus_init(psmouse, &intertouch_board,
1805 &pdata, sizeof(pdata), true,
1806 leave_breadcrumbs);
1807 }
1808
1809 /*
1810 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1811 * and decides to instantiate a SMBus InterTouch device.
1812 */
synaptics_setup_intertouch(struct psmouse * psmouse,struct synaptics_device_info * info,bool leave_breadcrumbs)1813 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1814 struct synaptics_device_info *info,
1815 bool leave_breadcrumbs)
1816 {
1817 int error;
1818
1819 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1820 return -ENXIO;
1821
1822 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1823 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1824 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1825
1826 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1827 psmouse_info(psmouse,
1828 "Your touchpad (%s) says it can support a different bus. "
1829 "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",
1830 psmouse->ps2dev.serio->firmware_id);
1831
1832 return -ENXIO;
1833 }
1834 }
1835
1836 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1837
1838 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1839 if (error) {
1840 if (error == -EAGAIN)
1841 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1842 else
1843 psmouse_err(psmouse, "unable to create intertouch device\n");
1844
1845 return error;
1846 }
1847
1848 return 0;
1849 }
1850
synaptics_init_smbus(struct psmouse * psmouse)1851 int synaptics_init_smbus(struct psmouse *psmouse)
1852 {
1853 struct synaptics_device_info info;
1854 int error;
1855
1856 psmouse_reset(psmouse);
1857
1858 error = synaptics_query_hardware(psmouse, &info);
1859 if (error) {
1860 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1861 return error;
1862 }
1863
1864 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1865 return -ENXIO;
1866
1867 return synaptics_create_intertouch(psmouse, &info, false);
1868 }
1869
1870 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1871
1872 static int __maybe_unused
synaptics_setup_intertouch(struct psmouse * psmouse,struct synaptics_device_info * info,bool leave_breadcrumbs)1873 synaptics_setup_intertouch(struct psmouse *psmouse,
1874 struct synaptics_device_info *info,
1875 bool leave_breadcrumbs)
1876 {
1877 return -ENOSYS;
1878 }
1879
synaptics_init_smbus(struct psmouse * psmouse)1880 int synaptics_init_smbus(struct psmouse *psmouse)
1881 {
1882 return -ENOSYS;
1883 }
1884
1885 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1886
1887 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1888 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1889
synaptics_init(struct psmouse * psmouse)1890 int synaptics_init(struct psmouse *psmouse)
1891 {
1892 struct synaptics_device_info info;
1893 int error;
1894 int retval;
1895
1896 psmouse_reset(psmouse);
1897
1898 error = synaptics_query_hardware(psmouse, &info);
1899 if (error) {
1900 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1901 return error;
1902 }
1903
1904 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1905 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1906 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1907 /* Forcepads need F21, which is not ready */
1908 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1909 psmouse_warn(psmouse,
1910 "The touchpad can support a better bus than the too old PS/2 protocol. "
1911 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1912 }
1913
1914 error = synaptics_setup_intertouch(psmouse, &info, true);
1915 if (!error)
1916 return PSMOUSE_SYNAPTICS_SMBUS;
1917 }
1918
1919 retval = synaptics_setup_ps2(psmouse, &info);
1920 if (retval < 0) {
1921 /*
1922 * Not using any flavor of Synaptics support, so clean up
1923 * SMbus breadcrumbs, if any.
1924 */
1925 psmouse_smbus_cleanup(psmouse);
1926 }
1927
1928 return retval;
1929 }
1930
1931 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1932
synaptics_init(struct psmouse * psmouse)1933 int synaptics_init(struct psmouse *psmouse)
1934 {
1935 return -ENOSYS;
1936 }
1937
1938 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1939