Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-only
2 : /*
3 : * Synaptics TouchPad PS/2 mouse driver
4 : *
5 : * 2003 Dmitry Torokhov <dtor@mail.ru>
6 : * Added support for pass-through port. Special thanks to Peter Berg Larsen
7 : * for explaining various Synaptics quirks.
8 : *
9 : * 2003 Peter Osterlund <petero2@telia.com>
10 : * Ported to 2.5 input device infrastructure.
11 : *
12 : * Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
13 : * start merging tpconfig and gpm code to a xfree-input module
14 : * adding some changes and extensions (ex. 3rd and 4th button)
15 : *
16 : * Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
17 : * Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
18 : * code for the special synaptics commands (from the tpconfig-source)
19 : *
20 : * Trademarks are the property of their respective owners.
21 : */
22 :
23 : #include <linux/module.h>
24 : #include <linux/delay.h>
25 : #include <linux/dmi.h>
26 : #include <linux/input/mt.h>
27 : #include <linux/serio.h>
28 : #include <linux/libps2.h>
29 : #include <linux/rmi.h>
30 : #include <linux/i2c.h>
31 : #include <linux/slab.h>
32 : #include "psmouse.h"
33 : #include "synaptics.h"
34 :
35 : /*
36 : * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
37 : * section 2.3.2, which says that they should be valid regardless of the
38 : * actual size of the sensor.
39 : * Note that newer firmware allows querying device for maximum useable
40 : * coordinates.
41 : */
42 : #define XMIN 0
43 : #define XMAX 6143
44 : #define YMIN 0
45 : #define YMAX 6143
46 : #define XMIN_NOMINAL 1472
47 : #define XMAX_NOMINAL 5472
48 : #define YMIN_NOMINAL 1408
49 : #define YMAX_NOMINAL 4448
50 :
51 : /* Size in bits of absolute position values reported by the hardware */
52 : #define ABS_POS_BITS 13
53 :
54 : /*
55 : * These values should represent the absolute maximum value that will
56 : * be reported for a positive position value. Some Synaptics firmware
57 : * uses this value to indicate a finger near the edge of the touchpad
58 : * whose precise position cannot be determined.
59 : *
60 : * At least one touchpad is known to report positions in excess of this
61 : * value which are actually negative values truncated to the 13-bit
62 : * reporting range. These values have never been observed to be lower
63 : * than 8184 (i.e. -8), so we treat all values greater than 8176 as
64 : * negative and any other value as positive.
65 : */
66 : #define X_MAX_POSITIVE 8176
67 : #define Y_MAX_POSITIVE 8176
68 :
69 : /* maximum ABS_MT_POSITION displacement (in mm) */
70 : #define DMAX 10
71 :
72 : /*****************************************************************************
73 : * Stuff we need even when we do not want native Synaptics support
74 : ****************************************************************************/
75 :
76 : /*
77 : * Set the synaptics touchpad mode byte by special commands
78 : */
79 0 : static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
80 : {
81 : u8 param[1];
82 : int error;
83 :
84 0 : error = ps2_sliced_command(&psmouse->ps2dev, mode);
85 0 : if (error)
86 : return error;
87 :
88 0 : param[0] = SYN_PS_SET_MODE2;
89 0 : error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
90 0 : if (error)
91 : return error;
92 :
93 0 : return 0;
94 : }
95 :
96 0 : int synaptics_detect(struct psmouse *psmouse, bool set_properties)
97 : {
98 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
99 0 : u8 param[4] = { 0 };
100 :
101 0 : ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
102 0 : ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
103 0 : ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
104 0 : ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
105 0 : ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
106 :
107 0 : if (param[1] != 0x47)
108 : return -ENODEV;
109 :
110 0 : if (set_properties) {
111 0 : psmouse->vendor = "Synaptics";
112 0 : psmouse->name = "TouchPad";
113 : }
114 :
115 : return 0;
116 : }
117 :
118 0 : void synaptics_reset(struct psmouse *psmouse)
119 : {
120 : /* reset touchpad back to relative mode, gestures enabled */
121 0 : synaptics_mode_cmd(psmouse, 0);
122 0 : }
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 : "LEN200f", /* T450s */
187 : "LEN2044", /* L470 */
188 : "LEN2054", /* E480 */
189 : "LEN2055", /* E580 */
190 : "LEN2068", /* T14 Gen 1 */
191 : "SYN3052", /* HP EliteBook 840 G4 */
192 : "SYN3221", /* HP 15-ay000 */
193 : "SYN323d", /* HP Spectre X360 13-w013dx */
194 : "SYN3257", /* HP Envy 13-ad105ng */
195 : NULL
196 : };
197 :
198 : static const char * const forcepad_pnp_ids[] = {
199 : "SYN300D",
200 : "SYN3014",
201 : NULL
202 : };
203 :
204 : /*
205 : * Send a command to the synaptics touchpad by special commands
206 : */
207 0 : static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
208 : {
209 : int error;
210 :
211 0 : error = ps2_sliced_command(&psmouse->ps2dev, cmd);
212 0 : if (error)
213 : return error;
214 :
215 0 : error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
216 0 : if (error)
217 : return error;
218 :
219 0 : return 0;
220 : }
221 :
222 0 : static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
223 : {
224 : int error;
225 : union {
226 : __be32 be_val;
227 : char buf[4];
228 0 : } resp = { 0 };
229 :
230 0 : error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
231 0 : if (error)
232 : return error;
233 :
234 0 : *val = be32_to_cpu(resp.be_val);
235 0 : return 0;
236 : }
237 :
238 : /*
239 : * Identify Touchpad
240 : * See also the SYN_ID_* macros
241 : */
242 : static int synaptics_identify(struct psmouse *psmouse,
243 : struct synaptics_device_info *info)
244 : {
245 : int error;
246 :
247 0 : error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
248 0 : if (error)
249 : return error;
250 :
251 0 : return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
252 : }
253 :
254 : /*
255 : * Read the model-id bytes from the touchpad
256 : * see also SYN_MODEL_* macros
257 : */
258 : static int synaptics_model_id(struct psmouse *psmouse,
259 : struct synaptics_device_info *info)
260 : {
261 0 : return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
262 : }
263 :
264 : /*
265 : * Read the firmware id from the touchpad
266 : */
267 : static int synaptics_firmware_id(struct psmouse *psmouse,
268 : struct synaptics_device_info *info)
269 : {
270 0 : return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
271 : &info->firmware_id);
272 : }
273 :
274 : /*
275 : * Read the board id and the "More Extended Queries" from the touchpad
276 : * The board id is encoded in the "QUERY MODES" response
277 : */
278 0 : static int synaptics_query_modes(struct psmouse *psmouse,
279 : struct synaptics_device_info *info)
280 : {
281 : u8 bid[3];
282 : int error;
283 :
284 : /* firmwares prior 7.5 have no board_id encoded */
285 0 : if (SYN_ID_FULL(info->identity) < 0x705)
286 : return 0;
287 :
288 0 : error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
289 0 : if (error)
290 : return error;
291 :
292 0 : info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
293 :
294 0 : if (SYN_MEXT_CAP_BIT(bid[0]))
295 0 : return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
296 : &info->ext_cap_10);
297 :
298 : return 0;
299 : }
300 :
301 : /*
302 : * Read the capability-bits from the touchpad
303 : * see also the SYN_CAP_* macros
304 : */
305 0 : static int synaptics_capability(struct psmouse *psmouse,
306 : struct synaptics_device_info *info)
307 : {
308 : int error;
309 :
310 0 : error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
311 : &info->capabilities);
312 0 : if (error)
313 : return error;
314 :
315 0 : info->ext_cap = info->ext_cap_0c = 0;
316 :
317 : /*
318 : * Older firmwares had submodel ID fixed to 0x47
319 : */
320 0 : if (SYN_ID_FULL(info->identity) < 0x705 &&
321 0 : SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
322 : return -ENXIO;
323 : }
324 :
325 : /*
326 : * Unless capExtended is set the rest of the flags should be ignored
327 : */
328 0 : if (!SYN_CAP_EXTENDED(info->capabilities))
329 0 : info->capabilities = 0;
330 :
331 0 : if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
332 0 : error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
333 : &info->ext_cap);
334 0 : if (error) {
335 0 : psmouse_warn(psmouse,
336 : "device claims to have extended capabilities, but I'm not able to read them.\n");
337 : } else {
338 : /*
339 : * if nExtBtn is greater than 8 it should be considered
340 : * invalid and treated as 0
341 : */
342 0 : if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
343 0 : info->ext_cap &= ~SYN_CAP_MB_MASK;
344 : }
345 : }
346 :
347 0 : if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
348 0 : error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
349 : &info->ext_cap_0c);
350 0 : if (error)
351 0 : psmouse_warn(psmouse,
352 : "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
353 : }
354 :
355 : return 0;
356 : }
357 :
358 : /*
359 : * Read touchpad resolution and maximum reported coordinates
360 : * Resolution is left zero if touchpad does not support the query
361 : */
362 0 : static int synaptics_resolution(struct psmouse *psmouse,
363 : struct synaptics_device_info *info)
364 : {
365 : u8 resp[3];
366 : int error;
367 :
368 0 : if (SYN_ID_MAJOR(info->identity) < 4)
369 : return 0;
370 :
371 0 : error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
372 0 : if (!error) {
373 0 : if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
374 0 : info->x_res = resp[0]; /* x resolution in units/mm */
375 0 : info->y_res = resp[2]; /* y resolution in units/mm */
376 : }
377 : }
378 :
379 0 : if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
380 0 : SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
381 0 : error = synaptics_send_cmd(psmouse,
382 : SYN_QUE_EXT_MAX_COORDS, resp);
383 0 : if (error) {
384 0 : psmouse_warn(psmouse,
385 : "device claims to have max coordinates query, but I'm not able to read it.\n");
386 : } else {
387 0 : info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
388 0 : info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
389 0 : psmouse_info(psmouse,
390 : "queried max coordinates: x [..%d], y [..%d]\n",
391 : info->x_max, info->y_max);
392 : }
393 : }
394 :
395 0 : if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
396 0 : (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
397 : /*
398 : * Firmware v8.1 does not report proper number of extended
399 : * capabilities, but has been proven to report correct min
400 : * coordinates.
401 : */
402 0 : SYN_ID_FULL(info->identity) == 0x801)) {
403 0 : error = synaptics_send_cmd(psmouse,
404 : SYN_QUE_EXT_MIN_COORDS, resp);
405 0 : if (error) {
406 0 : psmouse_warn(psmouse,
407 : "device claims to have min coordinates query, but I'm not able to read it.\n");
408 : } else {
409 0 : info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
410 0 : info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
411 0 : psmouse_info(psmouse,
412 : "queried min coordinates: x [%d..], y [%d..]\n",
413 : info->x_min, info->y_min);
414 : }
415 : }
416 :
417 : return 0;
418 : }
419 :
420 0 : static int synaptics_query_hardware(struct psmouse *psmouse,
421 : struct synaptics_device_info *info)
422 : {
423 : int error;
424 :
425 0 : memset(info, 0, sizeof(*info));
426 :
427 0 : error = synaptics_identify(psmouse, info);
428 0 : if (error)
429 : return error;
430 :
431 0 : error = synaptics_model_id(psmouse, info);
432 0 : if (error)
433 : return error;
434 :
435 0 : error = synaptics_firmware_id(psmouse, info);
436 0 : if (error)
437 : return error;
438 :
439 0 : error = synaptics_query_modes(psmouse, info);
440 0 : if (error)
441 : return error;
442 :
443 0 : error = synaptics_capability(psmouse, info);
444 0 : if (error)
445 : return error;
446 :
447 0 : error = synaptics_resolution(psmouse, info);
448 0 : if (error)
449 : return error;
450 :
451 0 : return 0;
452 : }
453 :
454 : #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
455 :
456 : #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
457 :
458 : static bool cr48_profile_sensor;
459 :
460 : #define ANY_BOARD_ID 0
461 : struct min_max_quirk {
462 : const char * const *pnp_ids;
463 : struct {
464 : u32 min, max;
465 : } board_id;
466 : u32 x_min, x_max, y_min, y_max;
467 : };
468 :
469 : static const struct min_max_quirk min_max_pnpid_table[] = {
470 : {
471 : (const char * const []){"LEN0033", NULL},
472 : {ANY_BOARD_ID, ANY_BOARD_ID},
473 : 1024, 5052, 2258, 4832
474 : },
475 : {
476 : (const char * const []){"LEN0042", NULL},
477 : {ANY_BOARD_ID, ANY_BOARD_ID},
478 : 1232, 5710, 1156, 4696
479 : },
480 : {
481 : (const char * const []){"LEN0034", "LEN0036", "LEN0037",
482 : "LEN0039", "LEN2002", "LEN2004",
483 : NULL},
484 : {ANY_BOARD_ID, 2961},
485 : 1024, 5112, 2024, 4832
486 : },
487 : {
488 : (const char * const []){"LEN2000", NULL},
489 : {ANY_BOARD_ID, ANY_BOARD_ID},
490 : 1024, 5113, 2021, 4832
491 : },
492 : {
493 : (const char * const []){"LEN2001", NULL},
494 : {ANY_BOARD_ID, ANY_BOARD_ID},
495 : 1024, 5022, 2508, 4832
496 : },
497 : {
498 : (const char * const []){"LEN2006", NULL},
499 : {2691, 2691},
500 : 1024, 5045, 2457, 4832
501 : },
502 : {
503 : (const char * const []){"LEN2006", NULL},
504 : {ANY_BOARD_ID, ANY_BOARD_ID},
505 : 1264, 5675, 1171, 4688
506 : },
507 : { }
508 : };
509 :
510 : /*****************************************************************************
511 : * Synaptics communications functions
512 : ****************************************************************************/
513 :
514 : /*
515 : * Synaptics touchpads report the y coordinate from bottom to top, which is
516 : * opposite from what userspace expects.
517 : * This function is used to invert y before reporting.
518 : */
519 : static int synaptics_invert_y(int y)
520 : {
521 0 : return YMAX_NOMINAL + YMIN_NOMINAL - y;
522 : }
523 :
524 : /*
525 : * Apply quirk(s) if the hardware matches
526 : */
527 0 : static void synaptics_apply_quirks(struct psmouse *psmouse,
528 : struct synaptics_device_info *info)
529 : {
530 : int i;
531 :
532 0 : for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
533 0 : if (!psmouse_matches_pnp_id(psmouse,
534 : min_max_pnpid_table[i].pnp_ids))
535 0 : continue;
536 :
537 0 : if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
538 0 : info->board_id < min_max_pnpid_table[i].board_id.min)
539 0 : continue;
540 :
541 0 : if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
542 0 : info->board_id > min_max_pnpid_table[i].board_id.max)
543 0 : continue;
544 :
545 0 : info->x_min = min_max_pnpid_table[i].x_min;
546 0 : info->x_max = min_max_pnpid_table[i].x_max;
547 0 : info->y_min = min_max_pnpid_table[i].y_min;
548 0 : info->y_max = min_max_pnpid_table[i].y_max;
549 0 : psmouse_info(psmouse,
550 : "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
551 : info->x_min, info->x_max,
552 : info->y_min, info->y_max);
553 0 : break;
554 : }
555 0 : }
556 :
557 : static bool synaptics_has_agm(struct synaptics_data *priv)
558 : {
559 0 : return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
560 : SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
561 : }
562 :
563 0 : static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
564 : {
565 : static u8 param = 0xc8;
566 : int error;
567 :
568 0 : error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
569 0 : if (error)
570 : return error;
571 :
572 0 : error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE);
573 0 : if (error)
574 : return error;
575 :
576 0 : return 0;
577 : }
578 :
579 0 : static int synaptics_set_mode(struct psmouse *psmouse)
580 : {
581 0 : struct synaptics_data *priv = psmouse->private;
582 : int error;
583 :
584 0 : priv->mode = 0;
585 0 : if (priv->absolute_mode)
586 0 : priv->mode |= SYN_BIT_ABSOLUTE_MODE;
587 0 : if (priv->disable_gesture)
588 0 : priv->mode |= SYN_BIT_DISABLE_GESTURE;
589 0 : if (psmouse->rate >= 80)
590 0 : priv->mode |= SYN_BIT_HIGH_RATE;
591 0 : if (SYN_CAP_EXTENDED(priv->info.capabilities))
592 0 : priv->mode |= SYN_BIT_W_MODE;
593 :
594 0 : error = synaptics_mode_cmd(psmouse, priv->mode);
595 0 : if (error)
596 : return error;
597 :
598 0 : if (priv->absolute_mode && synaptics_has_agm(priv)) {
599 0 : error = synaptics_set_advanced_gesture_mode(psmouse);
600 0 : if (error) {
601 0 : psmouse_err(psmouse,
602 : "Advanced gesture mode init failed: %d\n",
603 : error);
604 0 : return error;
605 : }
606 : }
607 :
608 : return 0;
609 : }
610 :
611 0 : static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
612 : {
613 0 : struct synaptics_data *priv = psmouse->private;
614 :
615 0 : if (rate >= 80) {
616 0 : priv->mode |= SYN_BIT_HIGH_RATE;
617 0 : psmouse->rate = 80;
618 : } else {
619 0 : priv->mode &= ~SYN_BIT_HIGH_RATE;
620 0 : psmouse->rate = 40;
621 : }
622 :
623 0 : synaptics_mode_cmd(psmouse, priv->mode);
624 0 : }
625 :
626 : /*****************************************************************************
627 : * Synaptics pass-through PS/2 port support
628 : ****************************************************************************/
629 0 : static int synaptics_pt_write(struct serio *serio, u8 c)
630 : {
631 0 : struct psmouse *parent = serio_get_drvdata(serio->parent);
632 0 : u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
633 : int error;
634 :
635 0 : error = ps2_sliced_command(&parent->ps2dev, c);
636 0 : if (error)
637 : return error;
638 :
639 0 : error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
640 0 : if (error)
641 : return error;
642 :
643 0 : return 0;
644 : }
645 :
646 0 : static int synaptics_pt_start(struct serio *serio)
647 : {
648 0 : struct psmouse *parent = serio_get_drvdata(serio->parent);
649 0 : struct synaptics_data *priv = parent->private;
650 :
651 0 : serio_pause_rx(parent->ps2dev.serio);
652 0 : priv->pt_port = serio;
653 0 : serio_continue_rx(parent->ps2dev.serio);
654 :
655 0 : return 0;
656 : }
657 :
658 0 : static void synaptics_pt_stop(struct serio *serio)
659 : {
660 0 : struct psmouse *parent = serio_get_drvdata(serio->parent);
661 0 : struct synaptics_data *priv = parent->private;
662 :
663 0 : serio_pause_rx(parent->ps2dev.serio);
664 0 : priv->pt_port = NULL;
665 0 : serio_continue_rx(parent->ps2dev.serio);
666 0 : }
667 :
668 : static int synaptics_is_pt_packet(u8 *buf)
669 : {
670 0 : return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
671 : }
672 :
673 0 : static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
674 : {
675 0 : struct psmouse *child = serio_get_drvdata(ptport);
676 :
677 0 : if (child && child->state == PSMOUSE_ACTIVATED) {
678 0 : serio_interrupt(ptport, packet[1], 0);
679 0 : serio_interrupt(ptport, packet[4], 0);
680 0 : serio_interrupt(ptport, packet[5], 0);
681 0 : if (child->pktsize == 4)
682 0 : serio_interrupt(ptport, packet[2], 0);
683 : } else {
684 0 : serio_interrupt(ptport, packet[1], 0);
685 : }
686 0 : }
687 :
688 0 : static void synaptics_pt_activate(struct psmouse *psmouse)
689 : {
690 0 : struct synaptics_data *priv = psmouse->private;
691 0 : struct psmouse *child = serio_get_drvdata(priv->pt_port);
692 :
693 : /* adjust the touchpad to child's choice of protocol */
694 0 : if (child) {
695 0 : if (child->pktsize == 4)
696 0 : priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
697 : else
698 0 : priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
699 :
700 0 : if (synaptics_mode_cmd(psmouse, priv->mode))
701 0 : psmouse_warn(psmouse,
702 : "failed to switch guest protocol\n");
703 : }
704 0 : }
705 :
706 0 : static void synaptics_pt_create(struct psmouse *psmouse)
707 : {
708 : struct serio *serio;
709 :
710 0 : serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
711 0 : if (!serio) {
712 0 : psmouse_err(psmouse,
713 : "not enough memory for pass-through port\n");
714 0 : return;
715 : }
716 :
717 0 : serio->id.type = SERIO_PS_PSTHRU;
718 0 : strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
719 0 : strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
720 0 : serio->write = synaptics_pt_write;
721 0 : serio->start = synaptics_pt_start;
722 0 : serio->stop = synaptics_pt_stop;
723 0 : serio->parent = psmouse->ps2dev.serio;
724 :
725 0 : psmouse->pt_activate = synaptics_pt_activate;
726 :
727 0 : psmouse_info(psmouse, "serio: %s port at %s\n",
728 : serio->name, psmouse->phys);
729 0 : serio_register_port(serio);
730 : }
731 :
732 : /*****************************************************************************
733 : * Functions to interpret the absolute mode packets
734 : ****************************************************************************/
735 :
736 0 : static void synaptics_parse_agm(const u8 buf[],
737 : struct synaptics_data *priv,
738 : struct synaptics_hw_state *hw)
739 : {
740 0 : struct synaptics_hw_state *agm = &priv->agm;
741 : int agm_packet_type;
742 :
743 0 : agm_packet_type = (buf[5] & 0x30) >> 4;
744 0 : switch (agm_packet_type) {
745 : case 1:
746 : /* Gesture packet: (x, y, z) half resolution */
747 0 : agm->w = hw->w;
748 0 : agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
749 0 : agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
750 0 : agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
751 : break;
752 :
753 : case 2:
754 : /* AGM-CONTACT packet: we are only interested in the count */
755 0 : priv->agm_count = buf[1];
756 : break;
757 :
758 : default:
759 : break;
760 : }
761 0 : }
762 :
763 : static void synaptics_parse_ext_buttons(const u8 buf[],
764 : struct synaptics_data *priv,
765 : struct synaptics_hw_state *hw)
766 : {
767 0 : unsigned int ext_bits =
768 0 : (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
769 0 : unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
770 :
771 0 : hw->ext_buttons = buf[4] & ext_mask;
772 0 : hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
773 : }
774 :
775 0 : static int synaptics_parse_hw_state(const u8 buf[],
776 : struct synaptics_data *priv,
777 : struct synaptics_hw_state *hw)
778 : {
779 0 : memset(hw, 0, sizeof(struct synaptics_hw_state));
780 :
781 0 : if (SYN_MODEL_NEWABS(priv->info.model_id)) {
782 0 : hw->w = (((buf[0] & 0x30) >> 2) |
783 0 : ((buf[0] & 0x04) >> 1) |
784 0 : ((buf[3] & 0x04) >> 2));
785 :
786 0 : if (synaptics_has_agm(priv) && hw->w == 2) {
787 0 : synaptics_parse_agm(buf, priv, hw);
788 0 : return 1;
789 : }
790 :
791 0 : hw->x = (((buf[3] & 0x10) << 8) |
792 0 : ((buf[1] & 0x0f) << 8) |
793 0 : buf[4]);
794 0 : hw->y = (((buf[3] & 0x20) << 7) |
795 0 : ((buf[1] & 0xf0) << 4) |
796 0 : buf[5]);
797 0 : hw->z = buf[2];
798 :
799 0 : hw->left = (buf[0] & 0x01) ? 1 : 0;
800 0 : hw->right = (buf[0] & 0x02) ? 1 : 0;
801 :
802 0 : if (priv->is_forcepad) {
803 : /*
804 : * ForcePads, like Clickpads, use middle button
805 : * bits to report primary button clicks.
806 : * Unfortunately they report primary button not
807 : * only when user presses on the pad above certain
808 : * threshold, but also when there are more than one
809 : * finger on the touchpad, which interferes with
810 : * out multi-finger gestures.
811 : */
812 0 : if (hw->z == 0) {
813 : /* No contacts */
814 0 : priv->press = priv->report_press = false;
815 0 : } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
816 : /*
817 : * Single-finger touch with pressure above
818 : * the threshold. If pressure stays long
819 : * enough, we'll start reporting primary
820 : * button. We rely on the device continuing
821 : * sending data even if finger does not
822 : * move.
823 : */
824 0 : if (!priv->press) {
825 0 : priv->press_start = jiffies;
826 0 : priv->press = true;
827 0 : } else if (time_after(jiffies,
828 : priv->press_start +
829 : msecs_to_jiffies(50))) {
830 0 : priv->report_press = true;
831 : }
832 : } else {
833 0 : priv->press = false;
834 : }
835 :
836 0 : hw->left = priv->report_press;
837 :
838 0 : } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
839 : /*
840 : * Clickpad's button is transmitted as middle button,
841 : * however, since it is primary button, we will report
842 : * it as BTN_LEFT.
843 : */
844 0 : hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
845 :
846 0 : } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
847 0 : hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
848 0 : if (hw->w == 2)
849 0 : hw->scroll = (s8)buf[1];
850 : }
851 :
852 0 : if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
853 0 : hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
854 0 : hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
855 : }
856 :
857 0 : if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
858 0 : ((buf[0] ^ buf[3]) & 0x02)) {
859 0 : synaptics_parse_ext_buttons(buf, priv, hw);
860 : }
861 : } else {
862 0 : hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
863 0 : hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
864 :
865 0 : hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
866 0 : hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
867 :
868 0 : hw->left = (buf[0] & 0x01) ? 1 : 0;
869 0 : hw->right = (buf[0] & 0x02) ? 1 : 0;
870 : }
871 :
872 : /*
873 : * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
874 : * is used by some firmware to indicate a finger at the edge of
875 : * the touchpad whose precise position cannot be determined, so
876 : * convert these values to the maximum axis value.
877 : */
878 0 : if (hw->x > X_MAX_POSITIVE)
879 0 : hw->x -= 1 << ABS_POS_BITS;
880 0 : else if (hw->x == X_MAX_POSITIVE)
881 0 : hw->x = XMAX;
882 :
883 0 : if (hw->y > Y_MAX_POSITIVE)
884 0 : hw->y -= 1 << ABS_POS_BITS;
885 0 : else if (hw->y == Y_MAX_POSITIVE)
886 0 : hw->y = YMAX;
887 :
888 : return 0;
889 : }
890 :
891 0 : static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
892 : bool active, int x, int y)
893 : {
894 0 : input_mt_slot(dev, slot);
895 0 : input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
896 0 : if (active) {
897 0 : input_report_abs(dev, ABS_MT_POSITION_X, x);
898 0 : input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
899 : }
900 0 : }
901 :
902 0 : static void synaptics_report_semi_mt_data(struct input_dev *dev,
903 : const struct synaptics_hw_state *a,
904 : const struct synaptics_hw_state *b,
905 : int num_fingers)
906 : {
907 0 : if (num_fingers >= 2) {
908 0 : synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
909 0 : min(a->y, b->y));
910 0 : synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
911 0 : max(a->y, b->y));
912 0 : } else if (num_fingers == 1) {
913 0 : synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
914 0 : synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
915 : } else {
916 0 : synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
917 0 : synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
918 : }
919 0 : }
920 :
921 0 : static void synaptics_report_ext_buttons(struct psmouse *psmouse,
922 : const struct synaptics_hw_state *hw)
923 : {
924 0 : struct input_dev *dev = psmouse->dev;
925 0 : struct synaptics_data *priv = psmouse->private;
926 0 : int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
927 : int i;
928 :
929 0 : if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
930 : return;
931 :
932 : /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
933 0 : if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
934 0 : SYN_ID_FULL(priv->info.identity) == 0x802) &&
935 0 : !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
936 : return;
937 :
938 0 : if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
939 0 : for (i = 0; i < ext_bits; i++) {
940 0 : input_report_key(dev, BTN_0 + 2 * i,
941 0 : hw->ext_buttons & BIT(i));
942 0 : input_report_key(dev, BTN_1 + 2 * i,
943 0 : hw->ext_buttons & BIT(i + ext_bits));
944 : }
945 : return;
946 : }
947 :
948 : /*
949 : * This generation of touchpads has the trackstick buttons
950 : * physically wired to the touchpad. Re-route them through
951 : * the pass-through interface.
952 : */
953 0 : if (priv->pt_port) {
954 : u8 pt_buttons;
955 :
956 : /* The trackstick expects at most 3 buttons */
957 0 : pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
958 0 : SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
959 0 : SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
960 :
961 0 : serio_interrupt(priv->pt_port,
962 : PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
963 0 : serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
964 : }
965 : }
966 :
967 0 : static void synaptics_report_buttons(struct psmouse *psmouse,
968 : const struct synaptics_hw_state *hw)
969 : {
970 0 : struct input_dev *dev = psmouse->dev;
971 0 : struct synaptics_data *priv = psmouse->private;
972 :
973 0 : input_report_key(dev, BTN_LEFT, hw->left);
974 0 : input_report_key(dev, BTN_RIGHT, hw->right);
975 :
976 0 : if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
977 0 : input_report_key(dev, BTN_MIDDLE, hw->middle);
978 :
979 0 : if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
980 0 : input_report_key(dev, BTN_FORWARD, hw->up);
981 0 : input_report_key(dev, BTN_BACK, hw->down);
982 : }
983 :
984 0 : synaptics_report_ext_buttons(psmouse, hw);
985 0 : }
986 :
987 0 : static void synaptics_report_mt_data(struct psmouse *psmouse,
988 : const struct synaptics_hw_state *sgm,
989 : int num_fingers)
990 : {
991 0 : struct input_dev *dev = psmouse->dev;
992 0 : struct synaptics_data *priv = psmouse->private;
993 0 : const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
994 : struct input_mt_pos pos[2];
995 : int slot[2], nsemi, i;
996 :
997 0 : nsemi = clamp_val(num_fingers, 0, 2);
998 :
999 0 : for (i = 0; i < nsemi; i++) {
1000 0 : pos[i].x = hw[i]->x;
1001 0 : pos[i].y = synaptics_invert_y(hw[i]->y);
1002 : }
1003 :
1004 0 : input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1005 :
1006 0 : for (i = 0; i < nsemi; i++) {
1007 0 : input_mt_slot(dev, slot[i]);
1008 0 : input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1009 0 : input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1010 0 : input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1011 0 : input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1012 : }
1013 :
1014 0 : input_mt_drop_unused(dev);
1015 :
1016 : /* Don't use active slot count to generate BTN_TOOL events. */
1017 0 : input_mt_report_pointer_emulation(dev, false);
1018 :
1019 : /* Send the number of fingers reported by touchpad itself. */
1020 0 : input_mt_report_finger_count(dev, num_fingers);
1021 :
1022 0 : synaptics_report_buttons(psmouse, sgm);
1023 :
1024 0 : input_sync(dev);
1025 0 : }
1026 :
1027 0 : static void synaptics_image_sensor_process(struct psmouse *psmouse,
1028 : struct synaptics_hw_state *sgm)
1029 : {
1030 0 : struct synaptics_data *priv = psmouse->private;
1031 : int num_fingers;
1032 :
1033 : /*
1034 : * Update mt_state using the new finger count and current mt_state.
1035 : */
1036 0 : if (sgm->z == 0)
1037 : num_fingers = 0;
1038 0 : else if (sgm->w >= 4)
1039 : num_fingers = 1;
1040 0 : else if (sgm->w == 0)
1041 : num_fingers = 2;
1042 0 : else if (sgm->w == 1)
1043 0 : num_fingers = priv->agm_count ? priv->agm_count : 3;
1044 : else
1045 : num_fingers = 4;
1046 :
1047 : /* Send resulting input events to user space */
1048 0 : synaptics_report_mt_data(psmouse, sgm, num_fingers);
1049 0 : }
1050 :
1051 : static bool synaptics_has_multifinger(struct synaptics_data *priv)
1052 : {
1053 0 : if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1054 : return true;
1055 :
1056 : /* Advanced gesture mode also sends multi finger data */
1057 0 : return synaptics_has_agm(priv);
1058 : }
1059 :
1060 : /*
1061 : * called for each full received packet from the touchpad
1062 : */
1063 0 : static void synaptics_process_packet(struct psmouse *psmouse)
1064 : {
1065 0 : struct input_dev *dev = psmouse->dev;
1066 0 : struct synaptics_data *priv = psmouse->private;
1067 0 : struct synaptics_device_info *info = &priv->info;
1068 : struct synaptics_hw_state hw;
1069 : int num_fingers;
1070 : int finger_width;
1071 :
1072 0 : if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1073 0 : return;
1074 :
1075 0 : if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1076 0 : synaptics_image_sensor_process(psmouse, &hw);
1077 0 : return;
1078 : }
1079 :
1080 0 : if (hw.scroll) {
1081 0 : priv->scroll += hw.scroll;
1082 :
1083 0 : while (priv->scroll >= 4) {
1084 0 : input_report_key(dev, BTN_BACK, !hw.down);
1085 0 : input_sync(dev);
1086 0 : input_report_key(dev, BTN_BACK, hw.down);
1087 0 : input_sync(dev);
1088 0 : priv->scroll -= 4;
1089 : }
1090 0 : while (priv->scroll <= -4) {
1091 0 : input_report_key(dev, BTN_FORWARD, !hw.up);
1092 0 : input_sync(dev);
1093 0 : input_report_key(dev, BTN_FORWARD, hw.up);
1094 0 : input_sync(dev);
1095 0 : priv->scroll += 4;
1096 : }
1097 : return;
1098 : }
1099 :
1100 0 : if (hw.z > 0 && hw.x > 1) {
1101 0 : num_fingers = 1;
1102 0 : finger_width = 5;
1103 0 : if (SYN_CAP_EXTENDED(info->capabilities)) {
1104 0 : switch (hw.w) {
1105 : case 0 ... 1:
1106 0 : if (synaptics_has_multifinger(priv))
1107 0 : num_fingers = hw.w + 2;
1108 : break;
1109 : case 2:
1110 : /*
1111 : * SYN_MODEL_PEN(info->model_id): even if
1112 : * the device supports pen, we treat it as
1113 : * a single finger.
1114 : */
1115 : break;
1116 : case 4 ... 15:
1117 0 : if (SYN_CAP_PALMDETECT(info->capabilities))
1118 0 : finger_width = hw.w;
1119 : break;
1120 : }
1121 : }
1122 : } else {
1123 : num_fingers = 0;
1124 : finger_width = 0;
1125 : }
1126 :
1127 0 : if (cr48_profile_sensor) {
1128 0 : synaptics_report_mt_data(psmouse, &hw, num_fingers);
1129 0 : return;
1130 : }
1131 :
1132 0 : if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1133 0 : synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1134 : num_fingers);
1135 :
1136 : /* Post events
1137 : * BTN_TOUCH has to be first as mousedev relies on it when doing
1138 : * absolute -> relative conversion
1139 : */
1140 0 : if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1141 0 : if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1142 :
1143 0 : if (num_fingers > 0) {
1144 0 : input_report_abs(dev, ABS_X, hw.x);
1145 0 : input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1146 : }
1147 0 : input_report_abs(dev, ABS_PRESSURE, hw.z);
1148 :
1149 0 : if (SYN_CAP_PALMDETECT(info->capabilities))
1150 : input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1151 :
1152 0 : input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1153 0 : if (synaptics_has_multifinger(priv)) {
1154 0 : input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1155 0 : input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1156 : }
1157 :
1158 0 : synaptics_report_buttons(psmouse, &hw);
1159 :
1160 0 : input_sync(dev);
1161 : }
1162 :
1163 0 : static bool synaptics_validate_byte(struct psmouse *psmouse,
1164 : int idx, enum synaptics_pkt_type pkt_type)
1165 : {
1166 : static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1167 : static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1168 : static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1169 : static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1170 : static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1171 0 : const u8 *packet = psmouse->packet;
1172 :
1173 0 : if (idx < 0 || idx > 4)
1174 : return false;
1175 :
1176 0 : switch (pkt_type) {
1177 :
1178 : case SYN_NEWABS:
1179 : case SYN_NEWABS_RELAXED:
1180 0 : return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1181 :
1182 : case SYN_NEWABS_STRICT:
1183 0 : return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1184 :
1185 : case SYN_OLDABS:
1186 0 : return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1187 :
1188 : default:
1189 0 : psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1190 0 : return false;
1191 : }
1192 : }
1193 :
1194 : static enum synaptics_pkt_type
1195 0 : synaptics_detect_pkt_type(struct psmouse *psmouse)
1196 : {
1197 : int i;
1198 :
1199 0 : for (i = 0; i < 5; i++) {
1200 0 : if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1201 0 : psmouse_info(psmouse, "using relaxed packet validation\n");
1202 0 : return SYN_NEWABS_RELAXED;
1203 : }
1204 : }
1205 :
1206 : return SYN_NEWABS_STRICT;
1207 : }
1208 :
1209 0 : static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1210 : {
1211 0 : struct synaptics_data *priv = psmouse->private;
1212 :
1213 0 : if (psmouse->pktcnt >= 6) { /* Full packet received */
1214 0 : if (unlikely(priv->pkt_type == SYN_NEWABS))
1215 0 : priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1216 :
1217 0 : if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1218 0 : synaptics_is_pt_packet(psmouse->packet)) {
1219 0 : if (priv->pt_port)
1220 0 : synaptics_pass_pt_packet(priv->pt_port,
1221 0 : psmouse->packet);
1222 : } else
1223 0 : synaptics_process_packet(psmouse);
1224 :
1225 : return PSMOUSE_FULL_PACKET;
1226 : }
1227 :
1228 0 : return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1229 0 : PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1230 : }
1231 :
1232 : /*****************************************************************************
1233 : * Driver initialization/cleanup functions
1234 : ****************************************************************************/
1235 0 : static void set_abs_position_params(struct input_dev *dev,
1236 : struct synaptics_device_info *info,
1237 : int x_code, int y_code)
1238 : {
1239 0 : int x_min = info->x_min ?: XMIN_NOMINAL;
1240 0 : int x_max = info->x_max ?: XMAX_NOMINAL;
1241 0 : int y_min = info->y_min ?: YMIN_NOMINAL;
1242 0 : int y_max = info->y_max ?: YMAX_NOMINAL;
1243 0 : int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1244 0 : SYN_REDUCED_FILTER_FUZZ : 0;
1245 :
1246 0 : input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1247 0 : input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1248 0 : input_abs_set_res(dev, x_code, info->x_res);
1249 0 : input_abs_set_res(dev, y_code, info->y_res);
1250 0 : }
1251 :
1252 0 : static int set_input_params(struct psmouse *psmouse,
1253 : struct synaptics_data *priv)
1254 : {
1255 0 : struct input_dev *dev = psmouse->dev;
1256 0 : struct synaptics_device_info *info = &priv->info;
1257 : int i;
1258 : int error;
1259 :
1260 : /* Reset default psmouse capabilities */
1261 0 : __clear_bit(EV_REL, dev->evbit);
1262 0 : bitmap_zero(dev->relbit, REL_CNT);
1263 0 : bitmap_zero(dev->keybit, KEY_CNT);
1264 :
1265 : /* Things that apply to both modes */
1266 0 : __set_bit(INPUT_PROP_POINTER, dev->propbit);
1267 :
1268 0 : input_set_capability(dev, EV_KEY, BTN_LEFT);
1269 :
1270 : /* Clickpads report only left button */
1271 0 : if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1272 0 : input_set_capability(dev, EV_KEY, BTN_RIGHT);
1273 0 : if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1274 0 : input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1275 : }
1276 :
1277 0 : if (!priv->absolute_mode) {
1278 : /* Relative mode */
1279 0 : input_set_capability(dev, EV_REL, REL_X);
1280 0 : input_set_capability(dev, EV_REL, REL_Y);
1281 0 : return 0;
1282 : }
1283 :
1284 : /* Absolute mode */
1285 0 : set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1286 0 : input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1287 :
1288 0 : if (cr48_profile_sensor)
1289 0 : input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1290 :
1291 0 : if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1292 0 : set_abs_position_params(dev, info,
1293 : ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1294 : /* Image sensors can report per-contact pressure */
1295 0 : input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1296 :
1297 0 : error = input_mt_init_slots(dev, 2,
1298 : INPUT_MT_POINTER | INPUT_MT_TRACK);
1299 0 : if (error)
1300 : return error;
1301 :
1302 : /* Image sensors can signal 4 and 5 finger clicks */
1303 0 : input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1304 0 : input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1305 0 : } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1306 0 : set_abs_position_params(dev, info,
1307 : ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1308 : /*
1309 : * Profile sensor in CR-48 tracks contacts reasonably well,
1310 : * other non-image sensors with AGM use semi-mt.
1311 : */
1312 0 : error = input_mt_init_slots(dev, 2,
1313 : INPUT_MT_POINTER |
1314 0 : (cr48_profile_sensor ?
1315 : INPUT_MT_TRACK :
1316 : INPUT_MT_SEMI_MT));
1317 0 : if (error)
1318 : return error;
1319 :
1320 : /*
1321 : * For semi-mt devices we send ABS_X/Y ourselves instead of
1322 : * input_mt_report_pointer_emulation. But
1323 : * input_mt_init_slots() resets the fuzz to 0, leading to a
1324 : * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1325 : * position. Let's re-initialize ABS_X/Y here.
1326 : */
1327 0 : if (!cr48_profile_sensor)
1328 0 : set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1329 : }
1330 :
1331 0 : if (SYN_CAP_PALMDETECT(info->capabilities))
1332 0 : input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1333 :
1334 0 : input_set_capability(dev, EV_KEY, BTN_TOUCH);
1335 0 : input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1336 :
1337 0 : if (synaptics_has_multifinger(priv)) {
1338 0 : input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1339 0 : input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1340 : }
1341 :
1342 0 : if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1343 : SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1344 0 : input_set_capability(dev, EV_KEY, BTN_FORWARD);
1345 0 : input_set_capability(dev, EV_KEY, BTN_BACK);
1346 : }
1347 :
1348 0 : if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1349 0 : for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1350 0 : input_set_capability(dev, EV_KEY, BTN_0 + i);
1351 :
1352 0 : if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1353 0 : __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1354 0 : if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1355 0 : !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1356 0 : __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1357 : }
1358 :
1359 : return 0;
1360 : }
1361 :
1362 0 : static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1363 : void *data, char *buf)
1364 : {
1365 0 : struct synaptics_data *priv = psmouse->private;
1366 :
1367 0 : return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1368 : }
1369 :
1370 0 : static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1371 : void *data, const char *buf,
1372 : size_t len)
1373 : {
1374 0 : struct synaptics_data *priv = psmouse->private;
1375 : unsigned int value;
1376 : int err;
1377 :
1378 0 : err = kstrtouint(buf, 10, &value);
1379 0 : if (err)
1380 0 : return err;
1381 :
1382 0 : if (value > 1)
1383 : return -EINVAL;
1384 :
1385 0 : if (value == priv->disable_gesture)
1386 0 : return len;
1387 :
1388 0 : priv->disable_gesture = value;
1389 0 : if (value)
1390 0 : priv->mode |= SYN_BIT_DISABLE_GESTURE;
1391 : else
1392 0 : priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1393 :
1394 0 : if (synaptics_mode_cmd(psmouse, priv->mode))
1395 : return -EIO;
1396 :
1397 0 : return len;
1398 : }
1399 :
1400 : PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1401 : synaptics_show_disable_gesture,
1402 : synaptics_set_disable_gesture);
1403 :
1404 0 : static void synaptics_disconnect(struct psmouse *psmouse)
1405 : {
1406 0 : struct synaptics_data *priv = psmouse->private;
1407 :
1408 : /*
1409 : * We might have left a breadcrumb when trying to
1410 : * set up SMbus companion.
1411 : */
1412 0 : psmouse_smbus_cleanup(psmouse);
1413 :
1414 0 : if (!priv->absolute_mode &&
1415 0 : SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1416 0 : device_remove_file(&psmouse->ps2dev.serio->dev,
1417 : &psmouse_attr_disable_gesture.dattr);
1418 :
1419 0 : synaptics_reset(psmouse);
1420 0 : kfree(priv);
1421 0 : psmouse->private = NULL;
1422 0 : }
1423 :
1424 0 : static int synaptics_reconnect(struct psmouse *psmouse)
1425 : {
1426 0 : struct synaptics_data *priv = psmouse->private;
1427 : struct synaptics_device_info info;
1428 : u8 param[2];
1429 0 : int retry = 0;
1430 : int error;
1431 :
1432 : do {
1433 0 : psmouse_reset(psmouse);
1434 0 : if (retry) {
1435 : /*
1436 : * On some boxes, right after resuming, the touchpad
1437 : * needs some time to finish initializing (I assume
1438 : * it needs time to calibrate) and start responding
1439 : * to Synaptics-specific queries, so let's wait a
1440 : * bit.
1441 : */
1442 : ssleep(1);
1443 : }
1444 0 : ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1445 0 : error = synaptics_detect(psmouse, 0);
1446 0 : } while (error && ++retry < 3);
1447 :
1448 0 : if (error)
1449 : return error;
1450 :
1451 : if (retry > 1)
1452 : psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1453 :
1454 0 : error = synaptics_query_hardware(psmouse, &info);
1455 0 : if (error) {
1456 0 : psmouse_err(psmouse, "Unable to query device.\n");
1457 0 : return error;
1458 : }
1459 :
1460 0 : error = synaptics_set_mode(psmouse);
1461 0 : if (error) {
1462 0 : psmouse_err(psmouse, "Unable to initialize device.\n");
1463 0 : return error;
1464 : }
1465 :
1466 0 : if (info.identity != priv->info.identity ||
1467 0 : info.model_id != priv->info.model_id ||
1468 0 : info.capabilities != priv->info.capabilities ||
1469 0 : info.ext_cap != priv->info.ext_cap) {
1470 0 : psmouse_err(psmouse,
1471 : "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1472 : priv->info.identity, info.identity,
1473 : priv->info.model_id, info.model_id,
1474 : priv->info.capabilities, info.capabilities,
1475 : priv->info.ext_cap, info.ext_cap);
1476 0 : return -ENXIO;
1477 : }
1478 :
1479 : return 0;
1480 : }
1481 :
1482 : static bool impaired_toshiba_kbc;
1483 :
1484 : static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1485 : #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1486 : {
1487 : /* Toshiba Satellite */
1488 : .matches = {
1489 : DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1490 : DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1491 : },
1492 : },
1493 : {
1494 : /* Toshiba Dynabook */
1495 : .matches = {
1496 : DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1497 : DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1498 : },
1499 : },
1500 : {
1501 : /* Toshiba Portege M300 */
1502 : .matches = {
1503 : DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1504 : DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1505 : },
1506 :
1507 : },
1508 : {
1509 : /* Toshiba Portege M300 */
1510 : .matches = {
1511 : DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1512 : DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1513 : DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1514 : },
1515 :
1516 : },
1517 : #endif
1518 : { }
1519 : };
1520 :
1521 : static bool broken_olpc_ec;
1522 :
1523 : static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1524 : #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1525 : {
1526 : /* OLPC XO-1 or XO-1.5 */
1527 : .matches = {
1528 : DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1529 : DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1530 : },
1531 : },
1532 : #endif
1533 : { }
1534 : };
1535 :
1536 : static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1537 : #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1538 : {
1539 : /* Cr-48 Chromebook (Codename Mario) */
1540 : .matches = {
1541 : DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1542 : DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1543 : },
1544 : },
1545 : #endif
1546 : { }
1547 : };
1548 :
1549 1 : void __init synaptics_module_init(void)
1550 : {
1551 1 : impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1552 1 : broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1553 1 : cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1554 1 : }
1555 :
1556 0 : static int synaptics_init_ps2(struct psmouse *psmouse,
1557 : struct synaptics_device_info *info,
1558 : bool absolute_mode)
1559 : {
1560 : struct synaptics_data *priv;
1561 : int err;
1562 :
1563 0 : synaptics_apply_quirks(psmouse, info);
1564 :
1565 0 : psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1566 0 : if (!priv)
1567 : return -ENOMEM;
1568 :
1569 0 : priv->info = *info;
1570 0 : priv->absolute_mode = absolute_mode;
1571 0 : if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1572 0 : priv->disable_gesture = true;
1573 :
1574 : /*
1575 : * Unfortunately ForcePad capability is not exported over PS/2,
1576 : * so we have to resort to checking PNP IDs.
1577 : */
1578 0 : priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1579 :
1580 0 : err = synaptics_set_mode(psmouse);
1581 0 : if (err) {
1582 0 : psmouse_err(psmouse, "Unable to initialize device.\n");
1583 0 : goto init_fail;
1584 : }
1585 :
1586 0 : priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1587 0 : SYN_NEWABS : SYN_OLDABS;
1588 :
1589 0 : psmouse_info(psmouse,
1590 : "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1591 : SYN_ID_MODEL(info->identity),
1592 : SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1593 : info->model_id,
1594 : info->capabilities, info->ext_cap, info->ext_cap_0c,
1595 : info->ext_cap_10, info->board_id, info->firmware_id);
1596 :
1597 0 : err = set_input_params(psmouse, priv);
1598 0 : if (err) {
1599 0 : psmouse_err(psmouse,
1600 : "failed to set up capabilities: %d\n", err);
1601 0 : goto init_fail;
1602 : }
1603 :
1604 : /*
1605 : * Encode touchpad model so that it can be used to set
1606 : * input device->id.version and be visible to userspace.
1607 : * Because version is __u16 we have to drop something.
1608 : * Hardware info bits seem to be good candidates as they
1609 : * are documented to be for Synaptics corp. internal use.
1610 : */
1611 0 : psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1612 0 : (info->model_id & 0x000000ff);
1613 :
1614 0 : if (absolute_mode) {
1615 0 : psmouse->protocol_handler = synaptics_process_byte;
1616 0 : psmouse->pktsize = 6;
1617 : } else {
1618 : /* Relative mode follows standard PS/2 mouse protocol */
1619 0 : psmouse->protocol_handler = psmouse_process_byte;
1620 0 : psmouse->pktsize = 3;
1621 : }
1622 :
1623 0 : psmouse->set_rate = synaptics_set_rate;
1624 0 : psmouse->disconnect = synaptics_disconnect;
1625 0 : psmouse->reconnect = synaptics_reconnect;
1626 0 : psmouse->cleanup = synaptics_reset;
1627 : /* Synaptics can usually stay in sync without extra help */
1628 0 : psmouse->resync_time = 0;
1629 :
1630 0 : if (SYN_CAP_PASS_THROUGH(info->capabilities))
1631 0 : synaptics_pt_create(psmouse);
1632 :
1633 : /*
1634 : * Toshiba's KBC seems to have trouble handling data from
1635 : * Synaptics at full rate. Switch to a lower rate (roughly
1636 : * the same rate as a standard PS/2 mouse).
1637 : */
1638 0 : if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1639 0 : psmouse_info(psmouse,
1640 : "Toshiba %s detected, limiting rate to 40pps.\n",
1641 : dmi_get_system_info(DMI_PRODUCT_NAME));
1642 0 : psmouse->rate = 40;
1643 : }
1644 :
1645 0 : if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1646 0 : err = device_create_file(&psmouse->ps2dev.serio->dev,
1647 : &psmouse_attr_disable_gesture.dattr);
1648 0 : if (err) {
1649 0 : psmouse_err(psmouse,
1650 : "Failed to create disable_gesture attribute (%d)",
1651 : err);
1652 0 : goto init_fail;
1653 : }
1654 : }
1655 :
1656 : return 0;
1657 :
1658 : init_fail:
1659 0 : kfree(priv);
1660 0 : return err;
1661 : }
1662 :
1663 0 : static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1664 : {
1665 : struct synaptics_device_info info;
1666 : int error;
1667 :
1668 0 : psmouse_reset(psmouse);
1669 :
1670 0 : error = synaptics_query_hardware(psmouse, &info);
1671 0 : if (error) {
1672 0 : psmouse_err(psmouse, "Unable to query device: %d\n", error);
1673 0 : return error;
1674 : }
1675 :
1676 0 : return synaptics_init_ps2(psmouse, &info, absolute_mode);
1677 : }
1678 :
1679 0 : int synaptics_init_absolute(struct psmouse *psmouse)
1680 : {
1681 0 : return __synaptics_init(psmouse, true);
1682 : }
1683 :
1684 0 : int synaptics_init_relative(struct psmouse *psmouse)
1685 : {
1686 0 : return __synaptics_init(psmouse, false);
1687 : }
1688 :
1689 0 : static int synaptics_setup_ps2(struct psmouse *psmouse,
1690 : struct synaptics_device_info *info)
1691 : {
1692 0 : bool absolute_mode = true;
1693 : int error;
1694 :
1695 : /*
1696 : * The OLPC XO has issues with Synaptics' absolute mode; the constant
1697 : * packet spew overloads the EC such that key presses on the keyboard
1698 : * are missed. Given that, don't even attempt to use Absolute mode.
1699 : * Relative mode seems to work just fine.
1700 : */
1701 0 : if (broken_olpc_ec) {
1702 0 : psmouse_info(psmouse,
1703 : "OLPC XO detected, forcing relative protocol.\n");
1704 0 : absolute_mode = false;
1705 : }
1706 :
1707 0 : error = synaptics_init_ps2(psmouse, info, absolute_mode);
1708 0 : if (error)
1709 : return error;
1710 :
1711 0 : return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1712 : }
1713 :
1714 : #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1715 :
1716 : void __init synaptics_module_init(void)
1717 : {
1718 : }
1719 :
1720 : static int __maybe_unused
1721 : synaptics_setup_ps2(struct psmouse *psmouse,
1722 : struct synaptics_device_info *info)
1723 : {
1724 : return -ENOSYS;
1725 : }
1726 :
1727 : #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1728 :
1729 : #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1730 :
1731 : /*
1732 : * The newest Synaptics device can use a secondary bus (called InterTouch) which
1733 : * provides a better bandwidth and allow a better control of the touchpads.
1734 : * This is used to decide if we need to use this bus or not.
1735 : */
1736 : enum {
1737 : SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1738 : SYNAPTICS_INTERTOUCH_OFF,
1739 : SYNAPTICS_INTERTOUCH_ON,
1740 : };
1741 :
1742 : static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1743 : SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1744 : module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1745 : MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1746 :
1747 0 : static int synaptics_create_intertouch(struct psmouse *psmouse,
1748 : struct synaptics_device_info *info,
1749 : bool leave_breadcrumbs)
1750 : {
1751 0 : bool topbuttonpad =
1752 0 : psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1753 0 : !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1754 0 : const struct rmi_device_platform_data pdata = {
1755 : .sensor_pdata = {
1756 : .sensor_type = rmi_sensor_touchpad,
1757 : .axis_align.flip_y = true,
1758 : .kernel_tracking = false,
1759 : .topbuttonpad = topbuttonpad,
1760 : },
1761 : .gpio_data = {
1762 0 : .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1763 : .trackstick_buttons =
1764 0 : !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1765 : },
1766 : };
1767 0 : const struct i2c_board_info intertouch_board = {
1768 : I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1769 : .flags = I2C_CLIENT_HOST_NOTIFY,
1770 : };
1771 :
1772 0 : return psmouse_smbus_init(psmouse, &intertouch_board,
1773 : &pdata, sizeof(pdata), true,
1774 : leave_breadcrumbs);
1775 : }
1776 :
1777 : /*
1778 : * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1779 : * and decides to instantiate a SMBus InterTouch device.
1780 : */
1781 0 : static int synaptics_setup_intertouch(struct psmouse *psmouse,
1782 : struct synaptics_device_info *info,
1783 : bool leave_breadcrumbs)
1784 : {
1785 : int error;
1786 :
1787 0 : if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1788 : return -ENXIO;
1789 :
1790 0 : if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1791 0 : if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1792 0 : !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1793 :
1794 0 : if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1795 0 : psmouse_info(psmouse,
1796 : "Your touchpad (%s) says it can support a different bus. "
1797 : "If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-input@vger.kernel.org.\n",
1798 : psmouse->ps2dev.serio->firmware_id);
1799 :
1800 : return -ENXIO;
1801 : }
1802 : }
1803 :
1804 0 : psmouse_info(psmouse, "Trying to set up SMBus access\n");
1805 :
1806 0 : error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1807 0 : if (error) {
1808 0 : if (error == -EAGAIN)
1809 0 : psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1810 : else
1811 0 : psmouse_err(psmouse, "unable to create intertouch device\n");
1812 :
1813 : return error;
1814 : }
1815 :
1816 : return 0;
1817 : }
1818 :
1819 0 : int synaptics_init_smbus(struct psmouse *psmouse)
1820 : {
1821 : struct synaptics_device_info info;
1822 : int error;
1823 :
1824 0 : psmouse_reset(psmouse);
1825 :
1826 0 : error = synaptics_query_hardware(psmouse, &info);
1827 0 : if (error) {
1828 0 : psmouse_err(psmouse, "Unable to query device: %d\n", error);
1829 0 : return error;
1830 : }
1831 :
1832 0 : if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1833 : return -ENXIO;
1834 :
1835 0 : return synaptics_create_intertouch(psmouse, &info, false);
1836 : }
1837 :
1838 : #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1839 :
1840 : static int __maybe_unused
1841 : synaptics_setup_intertouch(struct psmouse *psmouse,
1842 : struct synaptics_device_info *info,
1843 : bool leave_breadcrumbs)
1844 : {
1845 : return -ENOSYS;
1846 : }
1847 :
1848 : int synaptics_init_smbus(struct psmouse *psmouse)
1849 : {
1850 : return -ENOSYS;
1851 : }
1852 :
1853 : #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1854 :
1855 : #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1856 : defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1857 :
1858 0 : int synaptics_init(struct psmouse *psmouse)
1859 : {
1860 : struct synaptics_device_info info;
1861 : int error;
1862 : int retval;
1863 :
1864 0 : psmouse_reset(psmouse);
1865 :
1866 0 : error = synaptics_query_hardware(psmouse, &info);
1867 0 : if (error) {
1868 0 : psmouse_err(psmouse, "Unable to query device: %d\n", error);
1869 0 : return error;
1870 : }
1871 :
1872 0 : if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1873 0 : if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1874 : !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1875 : /* Forcepads need F21, which is not ready */
1876 0 : !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1877 0 : psmouse_warn(psmouse,
1878 : "The touchpad can support a better bus than the too old PS/2 protocol. "
1879 : "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1880 : }
1881 :
1882 0 : error = synaptics_setup_intertouch(psmouse, &info, true);
1883 0 : if (!error)
1884 : return PSMOUSE_SYNAPTICS_SMBUS;
1885 : }
1886 :
1887 0 : retval = synaptics_setup_ps2(psmouse, &info);
1888 0 : if (retval < 0) {
1889 : /*
1890 : * Not using any flavor of Synaptics support, so clean up
1891 : * SMbus breadcrumbs, if any.
1892 : */
1893 0 : psmouse_smbus_cleanup(psmouse);
1894 : }
1895 :
1896 : return retval;
1897 : }
1898 :
1899 : #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1900 :
1901 : int synaptics_init(struct psmouse *psmouse)
1902 : {
1903 : return -ENOSYS;
1904 : }
1905 :
1906 : #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
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