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Merge tag 'mmc-v4.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
[mirror_ubuntu-artful-kernel.git] / drivers / input / mouse / synaptics.c
1 /*
2 * Synaptics TouchPad PS/2 mouse driver
3 *
4 * 2003 Dmitry Torokhov <dtor@mail.ru>
5 * Added support for pass-through port. Special thanks to Peter Berg Larsen
6 * for explaining various Synaptics quirks.
7 *
8 * 2003 Peter Osterlund <petero2@telia.com>
9 * Ported to 2.5 input device infrastructure.
10 *
11 * Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
12 * start merging tpconfig and gpm code to a xfree-input module
13 * adding some changes and extensions (ex. 3rd and 4th button)
14 *
15 * Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
16 * Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
17 * code for the special synaptics commands (from the tpconfig-source)
18 *
19 * This program is free software; you can redistribute it and/or modify it
20 * under the terms of the GNU General Public License version 2 as published by
21 * the Free Software Foundation.
22 *
23 * Trademarks are the property of their respective owners.
24 */
25
26 #include <linux/module.h>
27 #include <linux/delay.h>
28 #include <linux/dmi.h>
29 #include <linux/input/mt.h>
30 #include <linux/serio.h>
31 #include <linux/libps2.h>
32 #include <linux/rmi.h>
33 #include <linux/i2c.h>
34 #include <linux/slab.h>
35 #include "psmouse.h"
36 #include "synaptics.h"
37
38 /*
39 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
40 * section 2.3.2, which says that they should be valid regardless of the
41 * actual size of the sensor.
42 * Note that newer firmware allows querying device for maximum useable
43 * coordinates.
44 */
45 #define XMIN 0
46 #define XMAX 6143
47 #define YMIN 0
48 #define YMAX 6143
49 #define XMIN_NOMINAL 1472
50 #define XMAX_NOMINAL 5472
51 #define YMIN_NOMINAL 1408
52 #define YMAX_NOMINAL 4448
53
54 /* Size in bits of absolute position values reported by the hardware */
55 #define ABS_POS_BITS 13
56
57 /*
58 * These values should represent the absolute maximum value that will
59 * be reported for a positive position value. Some Synaptics firmware
60 * uses this value to indicate a finger near the edge of the touchpad
61 * whose precise position cannot be determined.
62 *
63 * At least one touchpad is known to report positions in excess of this
64 * value which are actually negative values truncated to the 13-bit
65 * reporting range. These values have never been observed to be lower
66 * than 8184 (i.e. -8), so we treat all values greater than 8176 as
67 * negative and any other value as positive.
68 */
69 #define X_MAX_POSITIVE 8176
70 #define Y_MAX_POSITIVE 8176
71
72 /* maximum ABS_MT_POSITION displacement (in mm) */
73 #define DMAX 10
74
75 /*****************************************************************************
76 * Stuff we need even when we do not want native Synaptics support
77 ****************************************************************************/
78
79 /*
80 * Set the synaptics touchpad mode byte by special commands
81 */
82 static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
83 {
84 u8 param[1];
85 int error;
86
87 error = psmouse_sliced_command(psmouse, mode);
88 if (error)
89 return error;
90
91 param[0] = SYN_PS_SET_MODE2;
92 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
93 if (error)
94 return error;
95
96 return 0;
97 }
98
99 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
100 {
101 struct ps2dev *ps2dev = &psmouse->ps2dev;
102 u8 param[4];
103
104 param[0] = 0;
105
106 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
107 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
108 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
109 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
110 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
111
112 if (param[1] != 0x47)
113 return -ENODEV;
114
115 if (set_properties) {
116 psmouse->vendor = "Synaptics";
117 psmouse->name = "TouchPad";
118 }
119
120 return 0;
121 }
122
123 void synaptics_reset(struct psmouse *psmouse)
124 {
125 /* reset touchpad back to relative mode, gestures enabled */
126 synaptics_mode_cmd(psmouse, 0);
127 }
128
129 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
130 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
131
132 /* This list has been kindly provided by Synaptics. */
133 static const char * const topbuttonpad_pnp_ids[] = {
134 "LEN0017",
135 "LEN0018",
136 "LEN0019",
137 "LEN0023",
138 "LEN002A",
139 "LEN002B",
140 "LEN002C",
141 "LEN002D",
142 "LEN002E",
143 "LEN0033", /* Helix */
144 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
145 "LEN0035", /* X240 */
146 "LEN0036", /* T440 */
147 "LEN0037", /* X1 Carbon 2nd */
148 "LEN0038",
149 "LEN0039", /* T440s */
150 "LEN0041",
151 "LEN0042", /* Yoga */
152 "LEN0045",
153 "LEN0047",
154 "LEN0049",
155 "LEN2000", /* S540 */
156 "LEN2001", /* Edge E431 */
157 "LEN2002", /* Edge E531 */
158 "LEN2003",
159 "LEN2004", /* L440 */
160 "LEN2005",
161 "LEN2006", /* Edge E440/E540 */
162 "LEN2007",
163 "LEN2008",
164 "LEN2009",
165 "LEN200A",
166 "LEN200B",
167 NULL
168 };
169
170 static const char * const smbus_pnp_ids[] = {
171 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
172 "LEN0048", /* X1 Carbon 3 */
173 "LEN0046", /* X250 */
174 "LEN004a", /* W541 */
175 "LEN200f", /* T450s */
176 NULL
177 };
178
179 static const char * const forcepad_pnp_ids[] = {
180 "SYN300D",
181 "SYN3014",
182 NULL
183 };
184
185 /*
186 * Send a command to the synpatics touchpad by special commands
187 */
188 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
189 {
190 int error;
191
192 error = psmouse_sliced_command(psmouse, cmd);
193 if (error)
194 return error;
195
196 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
197 if (error)
198 return error;
199
200 return 0;
201 }
202
203 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
204 {
205 int error;
206 union {
207 __be32 be_val;
208 char buf[4];
209 } resp = { 0 };
210
211 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
212 if (error)
213 return error;
214
215 *val = be32_to_cpu(resp.be_val);
216 return 0;
217 }
218
219 /*
220 * Identify Touchpad
221 * See also the SYN_ID_* macros
222 */
223 static int synaptics_identify(struct psmouse *psmouse,
224 struct synaptics_device_info *info)
225 {
226 int error;
227
228 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
229 if (error)
230 return error;
231
232 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
233 }
234
235 /*
236 * Read the model-id bytes from the touchpad
237 * see also SYN_MODEL_* macros
238 */
239 static int synaptics_model_id(struct psmouse *psmouse,
240 struct synaptics_device_info *info)
241 {
242 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
243 }
244
245 /*
246 * Read the firmware id from the touchpad
247 */
248 static int synaptics_firmware_id(struct psmouse *psmouse,
249 struct synaptics_device_info *info)
250 {
251 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
252 &info->firmware_id);
253 }
254
255 /*
256 * Read the board id and the "More Extended Queries" from the touchpad
257 * The board id is encoded in the "QUERY MODES" response
258 */
259 static int synaptics_query_modes(struct psmouse *psmouse,
260 struct synaptics_device_info *info)
261 {
262 u8 bid[3];
263 int error;
264
265 /* firmwares prior 7.5 have no board_id encoded */
266 if (SYN_ID_FULL(info->identity) < 0x705)
267 return 0;
268
269 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
270 if (error)
271 return error;
272
273 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
274
275 if (SYN_MEXT_CAP_BIT(bid[0]))
276 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
277 &info->ext_cap_10);
278
279 return 0;
280 }
281
282 /*
283 * Read the capability-bits from the touchpad
284 * see also the SYN_CAP_* macros
285 */
286 static int synaptics_capability(struct psmouse *psmouse,
287 struct synaptics_device_info *info)
288 {
289 int error;
290
291 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
292 &info->capabilities);
293 if (error)
294 return error;
295
296 info->ext_cap = info->ext_cap_0c = 0;
297
298 /*
299 * Older firmwares had submodel ID fixed to 0x47
300 */
301 if (SYN_ID_FULL(info->identity) < 0x705 &&
302 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
303 return -ENXIO;
304 }
305
306 /*
307 * Unless capExtended is set the rest of the flags should be ignored
308 */
309 if (!SYN_CAP_EXTENDED(info->capabilities))
310 info->capabilities = 0;
311
312 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
313 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
314 &info->ext_cap);
315 if (error) {
316 psmouse_warn(psmouse,
317 "device claims to have extended capabilities, but I'm not able to read them.\n");
318 } else {
319 /*
320 * if nExtBtn is greater than 8 it should be considered
321 * invalid and treated as 0
322 */
323 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
324 info->ext_cap &= ~SYN_CAP_MB_MASK;
325 }
326 }
327
328 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
329 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
330 &info->ext_cap_0c);
331 if (error)
332 psmouse_warn(psmouse,
333 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
334 }
335
336 return 0;
337 }
338
339 /*
340 * Read touchpad resolution and maximum reported coordinates
341 * Resolution is left zero if touchpad does not support the query
342 */
343 static int synaptics_resolution(struct psmouse *psmouse,
344 struct synaptics_device_info *info)
345 {
346 u8 resp[3];
347 int error;
348
349 if (SYN_ID_MAJOR(info->identity) < 4)
350 return 0;
351
352 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
353 if (!error) {
354 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
355 info->x_res = resp[0]; /* x resolution in units/mm */
356 info->y_res = resp[2]; /* y resolution in units/mm */
357 }
358 }
359
360 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
361 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
362 error = synaptics_send_cmd(psmouse,
363 SYN_QUE_EXT_MAX_COORDS, resp);
364 if (error) {
365 psmouse_warn(psmouse,
366 "device claims to have max coordinates query, but I'm not able to read it.\n");
367 } else {
368 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
369 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
370 psmouse_info(psmouse,
371 "queried max coordinates: x [..%d], y [..%d]\n",
372 info->x_max, info->y_max);
373 }
374 }
375
376 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
377 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
378 /*
379 * Firmware v8.1 does not report proper number of extended
380 * capabilities, but has been proven to report correct min
381 * coordinates.
382 */
383 SYN_ID_FULL(info->identity) == 0x801)) {
384 error = synaptics_send_cmd(psmouse,
385 SYN_QUE_EXT_MIN_COORDS, resp);
386 if (error) {
387 psmouse_warn(psmouse,
388 "device claims to have min coordinates query, but I'm not able to read it.\n");
389 } else {
390 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
391 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
392 psmouse_info(psmouse,
393 "queried min coordinates: x [%d..], y [%d..]\n",
394 info->x_min, info->y_min);
395 }
396 }
397
398 return 0;
399 }
400
401 static int synaptics_query_hardware(struct psmouse *psmouse,
402 struct synaptics_device_info *info)
403 {
404 int error;
405
406 memset(info, 0, sizeof(*info));
407
408 error = synaptics_identify(psmouse, info);
409 if (error)
410 return error;
411
412 error = synaptics_model_id(psmouse, info);
413 if (error)
414 return error;
415
416 error = synaptics_firmware_id(psmouse, info);
417 if (error)
418 return error;
419
420 error = synaptics_query_modes(psmouse, info);
421 if (error)
422 return error;
423
424 error = synaptics_capability(psmouse, info);
425 if (error)
426 return error;
427
428 error = synaptics_resolution(psmouse, info);
429 if (error)
430 return error;
431
432 return 0;
433 }
434
435 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
436
437 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
438
439 static bool cr48_profile_sensor;
440
441 #define ANY_BOARD_ID 0
442 struct min_max_quirk {
443 const char * const *pnp_ids;
444 struct {
445 u32 min, max;
446 } board_id;
447 u32 x_min, x_max, y_min, y_max;
448 };
449
450 static const struct min_max_quirk min_max_pnpid_table[] = {
451 {
452 (const char * const []){"LEN0033", NULL},
453 {ANY_BOARD_ID, ANY_BOARD_ID},
454 1024, 5052, 2258, 4832
455 },
456 {
457 (const char * const []){"LEN0042", NULL},
458 {ANY_BOARD_ID, ANY_BOARD_ID},
459 1232, 5710, 1156, 4696
460 },
461 {
462 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
463 "LEN0039", "LEN2002", "LEN2004",
464 NULL},
465 {ANY_BOARD_ID, 2961},
466 1024, 5112, 2024, 4832
467 },
468 {
469 (const char * const []){"LEN2000", NULL},
470 {ANY_BOARD_ID, ANY_BOARD_ID},
471 1024, 5113, 2021, 4832
472 },
473 {
474 (const char * const []){"LEN2001", NULL},
475 {ANY_BOARD_ID, ANY_BOARD_ID},
476 1024, 5022, 2508, 4832
477 },
478 {
479 (const char * const []){"LEN2006", NULL},
480 {2691, 2691},
481 1024, 5045, 2457, 4832
482 },
483 {
484 (const char * const []){"LEN2006", NULL},
485 {ANY_BOARD_ID, ANY_BOARD_ID},
486 1264, 5675, 1171, 4688
487 },
488 { }
489 };
490
491 /*****************************************************************************
492 * Synaptics communications functions
493 ****************************************************************************/
494
495 /*
496 * Synaptics touchpads report the y coordinate from bottom to top, which is
497 * opposite from what userspace expects.
498 * This function is used to invert y before reporting.
499 */
500 static int synaptics_invert_y(int y)
501 {
502 return YMAX_NOMINAL + YMIN_NOMINAL - y;
503 }
504
505 /*
506 * Apply quirk(s) if the hardware matches
507 */
508 static void synaptics_apply_quirks(struct psmouse *psmouse,
509 struct synaptics_device_info *info)
510 {
511 int i;
512
513 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
514 if (!psmouse_matches_pnp_id(psmouse,
515 min_max_pnpid_table[i].pnp_ids))
516 continue;
517
518 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
519 info->board_id < min_max_pnpid_table[i].board_id.min)
520 continue;
521
522 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
523 info->board_id > min_max_pnpid_table[i].board_id.max)
524 continue;
525
526 info->x_min = min_max_pnpid_table[i].x_min;
527 info->x_max = min_max_pnpid_table[i].x_max;
528 info->y_min = min_max_pnpid_table[i].y_min;
529 info->y_max = min_max_pnpid_table[i].y_max;
530 psmouse_info(psmouse,
531 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
532 info->x_min, info->x_max,
533 info->y_min, info->y_max);
534 break;
535 }
536 }
537
538 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
539 {
540 static u8 param = 0xc8;
541 struct synaptics_data *priv = psmouse->private;
542 int error;
543
544 if (!(SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
545 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)))
546 return 0;
547
548 error = psmouse_sliced_command(psmouse, SYN_QUE_MODEL);
549 if (error)
550 return error;
551
552 error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
553 if (error)
554 return error;
555
556 /* Advanced gesture mode also sends multi finger data */
557 priv->info.capabilities |= BIT(1);
558
559 return 0;
560 }
561
562 static int synaptics_set_mode(struct psmouse *psmouse)
563 {
564 struct synaptics_data *priv = psmouse->private;
565 int error;
566
567 priv->mode = 0;
568 if (priv->absolute_mode)
569 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
570 if (priv->disable_gesture)
571 priv->mode |= SYN_BIT_DISABLE_GESTURE;
572 if (psmouse->rate >= 80)
573 priv->mode |= SYN_BIT_HIGH_RATE;
574 if (SYN_CAP_EXTENDED(priv->info.capabilities))
575 priv->mode |= SYN_BIT_W_MODE;
576
577 error = synaptics_mode_cmd(psmouse, priv->mode);
578 if (error)
579 return error;
580
581 if (priv->absolute_mode) {
582 error = synaptics_set_advanced_gesture_mode(psmouse);
583 if (error) {
584 psmouse_err(psmouse,
585 "Advanced gesture mode init failed: %d\n",
586 error);
587 return error;
588 }
589 }
590
591 return 0;
592 }
593
594 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
595 {
596 struct synaptics_data *priv = psmouse->private;
597
598 if (rate >= 80) {
599 priv->mode |= SYN_BIT_HIGH_RATE;
600 psmouse->rate = 80;
601 } else {
602 priv->mode &= ~SYN_BIT_HIGH_RATE;
603 psmouse->rate = 40;
604 }
605
606 synaptics_mode_cmd(psmouse, priv->mode);
607 }
608
609 /*****************************************************************************
610 * Synaptics pass-through PS/2 port support
611 ****************************************************************************/
612 static int synaptics_pt_write(struct serio *serio, u8 c)
613 {
614 struct psmouse *parent = serio_get_drvdata(serio->parent);
615 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
616 int error;
617
618 error = psmouse_sliced_command(parent, c);
619 if (error)
620 return error;
621
622 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
623 if (error)
624 return error;
625
626 return 0;
627 }
628
629 static int synaptics_pt_start(struct serio *serio)
630 {
631 struct psmouse *parent = serio_get_drvdata(serio->parent);
632 struct synaptics_data *priv = parent->private;
633
634 serio_pause_rx(parent->ps2dev.serio);
635 priv->pt_port = serio;
636 serio_continue_rx(parent->ps2dev.serio);
637
638 return 0;
639 }
640
641 static void synaptics_pt_stop(struct serio *serio)
642 {
643 struct psmouse *parent = serio_get_drvdata(serio->parent);
644 struct synaptics_data *priv = parent->private;
645
646 serio_pause_rx(parent->ps2dev.serio);
647 priv->pt_port = NULL;
648 serio_continue_rx(parent->ps2dev.serio);
649 }
650
651 static int synaptics_is_pt_packet(u8 *buf)
652 {
653 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
654 }
655
656 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
657 {
658 struct psmouse *child = serio_get_drvdata(ptport);
659
660 if (child && child->state == PSMOUSE_ACTIVATED) {
661 serio_interrupt(ptport, packet[1], 0);
662 serio_interrupt(ptport, packet[4], 0);
663 serio_interrupt(ptport, packet[5], 0);
664 if (child->pktsize == 4)
665 serio_interrupt(ptport, packet[2], 0);
666 } else {
667 serio_interrupt(ptport, packet[1], 0);
668 }
669 }
670
671 static void synaptics_pt_activate(struct psmouse *psmouse)
672 {
673 struct synaptics_data *priv = psmouse->private;
674 struct psmouse *child = serio_get_drvdata(priv->pt_port);
675
676 /* adjust the touchpad to child's choice of protocol */
677 if (child) {
678 if (child->pktsize == 4)
679 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
680 else
681 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
682
683 if (synaptics_mode_cmd(psmouse, priv->mode))
684 psmouse_warn(psmouse,
685 "failed to switch guest protocol\n");
686 }
687 }
688
689 static void synaptics_pt_create(struct psmouse *psmouse)
690 {
691 struct serio *serio;
692
693 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
694 if (!serio) {
695 psmouse_err(psmouse,
696 "not enough memory for pass-through port\n");
697 return;
698 }
699
700 serio->id.type = SERIO_PS_PSTHRU;
701 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
702 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
703 serio->write = synaptics_pt_write;
704 serio->start = synaptics_pt_start;
705 serio->stop = synaptics_pt_stop;
706 serio->parent = psmouse->ps2dev.serio;
707
708 psmouse->pt_activate = synaptics_pt_activate;
709
710 psmouse_info(psmouse, "serio: %s port at %s\n",
711 serio->name, psmouse->phys);
712 serio_register_port(serio);
713 }
714
715 /*****************************************************************************
716 * Functions to interpret the absolute mode packets
717 ****************************************************************************/
718
719 static void synaptics_parse_agm(const u8 buf[],
720 struct synaptics_data *priv,
721 struct synaptics_hw_state *hw)
722 {
723 struct synaptics_hw_state *agm = &priv->agm;
724 int agm_packet_type;
725
726 agm_packet_type = (buf[5] & 0x30) >> 4;
727 switch (agm_packet_type) {
728 case 1:
729 /* Gesture packet: (x, y, z) half resolution */
730 agm->w = hw->w;
731 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
732 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
733 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
734 break;
735
736 case 2:
737 /* AGM-CONTACT packet: we are only interested in the count */
738 priv->agm_count = buf[1];
739 break;
740
741 default:
742 break;
743 }
744 }
745
746 static void synaptics_parse_ext_buttons(const u8 buf[],
747 struct synaptics_data *priv,
748 struct synaptics_hw_state *hw)
749 {
750 unsigned int ext_bits =
751 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
752 unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
753
754 hw->ext_buttons = buf[4] & ext_mask;
755 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
756 }
757
758 static int synaptics_parse_hw_state(const u8 buf[],
759 struct synaptics_data *priv,
760 struct synaptics_hw_state *hw)
761 {
762 memset(hw, 0, sizeof(struct synaptics_hw_state));
763
764 if (SYN_MODEL_NEWABS(priv->info.model_id)) {
765 hw->w = (((buf[0] & 0x30) >> 2) |
766 ((buf[0] & 0x04) >> 1) |
767 ((buf[3] & 0x04) >> 2));
768
769 if ((SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
770 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)) &&
771 hw->w == 2) {
772 synaptics_parse_agm(buf, priv, hw);
773 return 1;
774 }
775
776 hw->x = (((buf[3] & 0x10) << 8) |
777 ((buf[1] & 0x0f) << 8) |
778 buf[4]);
779 hw->y = (((buf[3] & 0x20) << 7) |
780 ((buf[1] & 0xf0) << 4) |
781 buf[5]);
782 hw->z = buf[2];
783
784 hw->left = (buf[0] & 0x01) ? 1 : 0;
785 hw->right = (buf[0] & 0x02) ? 1 : 0;
786
787 if (priv->is_forcepad) {
788 /*
789 * ForcePads, like Clickpads, use middle button
790 * bits to report primary button clicks.
791 * Unfortunately they report primary button not
792 * only when user presses on the pad above certain
793 * threshold, but also when there are more than one
794 * finger on the touchpad, which interferes with
795 * out multi-finger gestures.
796 */
797 if (hw->z == 0) {
798 /* No contacts */
799 priv->press = priv->report_press = false;
800 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
801 /*
802 * Single-finger touch with pressure above
803 * the threshold. If pressure stays long
804 * enough, we'll start reporting primary
805 * button. We rely on the device continuing
806 * sending data even if finger does not
807 * move.
808 */
809 if (!priv->press) {
810 priv->press_start = jiffies;
811 priv->press = true;
812 } else if (time_after(jiffies,
813 priv->press_start +
814 msecs_to_jiffies(50))) {
815 priv->report_press = true;
816 }
817 } else {
818 priv->press = false;
819 }
820
821 hw->left = priv->report_press;
822
823 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
824 /*
825 * Clickpad's button is transmitted as middle button,
826 * however, since it is primary button, we will report
827 * it as BTN_LEFT.
828 */
829 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
830
831 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
832 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
833 if (hw->w == 2)
834 hw->scroll = (s8)buf[1];
835 }
836
837 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
838 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
839 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
840 }
841
842 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
843 ((buf[0] ^ buf[3]) & 0x02)) {
844 synaptics_parse_ext_buttons(buf, priv, hw);
845 }
846 } else {
847 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
848 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
849
850 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
851 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
852
853 hw->left = (buf[0] & 0x01) ? 1 : 0;
854 hw->right = (buf[0] & 0x02) ? 1 : 0;
855 }
856
857 /*
858 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
859 * is used by some firmware to indicate a finger at the edge of
860 * the touchpad whose precise position cannot be determined, so
861 * convert these values to the maximum axis value.
862 */
863 if (hw->x > X_MAX_POSITIVE)
864 hw->x -= 1 << ABS_POS_BITS;
865 else if (hw->x == X_MAX_POSITIVE)
866 hw->x = XMAX;
867
868 if (hw->y > Y_MAX_POSITIVE)
869 hw->y -= 1 << ABS_POS_BITS;
870 else if (hw->y == Y_MAX_POSITIVE)
871 hw->y = YMAX;
872
873 return 0;
874 }
875
876 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
877 bool active, int x, int y)
878 {
879 input_mt_slot(dev, slot);
880 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
881 if (active) {
882 input_report_abs(dev, ABS_MT_POSITION_X, x);
883 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
884 }
885 }
886
887 static void synaptics_report_semi_mt_data(struct input_dev *dev,
888 const struct synaptics_hw_state *a,
889 const struct synaptics_hw_state *b,
890 int num_fingers)
891 {
892 if (num_fingers >= 2) {
893 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
894 min(a->y, b->y));
895 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
896 max(a->y, b->y));
897 } else if (num_fingers == 1) {
898 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
899 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
900 } else {
901 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
902 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
903 }
904 }
905
906 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
907 const struct synaptics_hw_state *hw)
908 {
909 struct input_dev *dev = psmouse->dev;
910 struct synaptics_data *priv = psmouse->private;
911 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
912 int i;
913
914 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
915 return;
916
917 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
918 if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
919 SYN_ID_FULL(priv->info.identity) == 0x802) &&
920 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
921 return;
922
923 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
924 for (i = 0; i < ext_bits; i++) {
925 input_report_key(dev, BTN_0 + 2 * i,
926 hw->ext_buttons & BIT(i));
927 input_report_key(dev, BTN_1 + 2 * i,
928 hw->ext_buttons & BIT(i + ext_bits));
929 }
930 return;
931 }
932
933 /*
934 * This generation of touchpads has the trackstick buttons
935 * physically wired to the touchpad. Re-route them through
936 * the pass-through interface.
937 */
938 if (priv->pt_port) {
939 u8 pt_buttons;
940
941 /* The trackstick expects at most 3 buttons */
942 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
943 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
944 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
945
946 serio_interrupt(priv->pt_port,
947 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
948 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
949 }
950 }
951
952 static void synaptics_report_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
958 input_report_key(dev, BTN_LEFT, hw->left);
959 input_report_key(dev, BTN_RIGHT, hw->right);
960
961 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
962 input_report_key(dev, BTN_MIDDLE, hw->middle);
963
964 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
965 input_report_key(dev, BTN_FORWARD, hw->up);
966 input_report_key(dev, BTN_BACK, hw->down);
967 }
968
969 synaptics_report_ext_buttons(psmouse, hw);
970 }
971
972 static void synaptics_report_mt_data(struct psmouse *psmouse,
973 const struct synaptics_hw_state *sgm,
974 int num_fingers)
975 {
976 struct input_dev *dev = psmouse->dev;
977 struct synaptics_data *priv = psmouse->private;
978 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
979 struct input_mt_pos pos[2];
980 int slot[2], nsemi, i;
981
982 nsemi = clamp_val(num_fingers, 0, 2);
983
984 for (i = 0; i < nsemi; i++) {
985 pos[i].x = hw[i]->x;
986 pos[i].y = synaptics_invert_y(hw[i]->y);
987 }
988
989 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
990
991 for (i = 0; i < nsemi; i++) {
992 input_mt_slot(dev, slot[i]);
993 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
994 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
995 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
996 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
997 }
998
999 input_mt_drop_unused(dev);
1000
1001 /* Don't use active slot count to generate BTN_TOOL events. */
1002 input_mt_report_pointer_emulation(dev, false);
1003
1004 /* Send the number of fingers reported by touchpad itself. */
1005 input_mt_report_finger_count(dev, num_fingers);
1006
1007 synaptics_report_buttons(psmouse, sgm);
1008
1009 input_sync(dev);
1010 }
1011
1012 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1013 struct synaptics_hw_state *sgm)
1014 {
1015 struct synaptics_data *priv = psmouse->private;
1016 int num_fingers;
1017
1018 /*
1019 * Update mt_state using the new finger count and current mt_state.
1020 */
1021 if (sgm->z == 0)
1022 num_fingers = 0;
1023 else if (sgm->w >= 4)
1024 num_fingers = 1;
1025 else if (sgm->w == 0)
1026 num_fingers = 2;
1027 else if (sgm->w == 1)
1028 num_fingers = priv->agm_count ? priv->agm_count : 3;
1029 else
1030 num_fingers = 4;
1031
1032 /* Send resulting input events to user space */
1033 synaptics_report_mt_data(psmouse, sgm, num_fingers);
1034 }
1035
1036 /*
1037 * called for each full received packet from the touchpad
1038 */
1039 static void synaptics_process_packet(struct psmouse *psmouse)
1040 {
1041 struct input_dev *dev = psmouse->dev;
1042 struct synaptics_data *priv = psmouse->private;
1043 struct synaptics_device_info *info = &priv->info;
1044 struct synaptics_hw_state hw;
1045 int num_fingers;
1046 int finger_width;
1047
1048 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1049 return;
1050
1051 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1052 synaptics_image_sensor_process(psmouse, &hw);
1053 return;
1054 }
1055
1056 if (hw.scroll) {
1057 priv->scroll += hw.scroll;
1058
1059 while (priv->scroll >= 4) {
1060 input_report_key(dev, BTN_BACK, !hw.down);
1061 input_sync(dev);
1062 input_report_key(dev, BTN_BACK, hw.down);
1063 input_sync(dev);
1064 priv->scroll -= 4;
1065 }
1066 while (priv->scroll <= -4) {
1067 input_report_key(dev, BTN_FORWARD, !hw.up);
1068 input_sync(dev);
1069 input_report_key(dev, BTN_FORWARD, hw.up);
1070 input_sync(dev);
1071 priv->scroll += 4;
1072 }
1073 return;
1074 }
1075
1076 if (hw.z > 0 && hw.x > 1) {
1077 num_fingers = 1;
1078 finger_width = 5;
1079 if (SYN_CAP_EXTENDED(info->capabilities)) {
1080 switch (hw.w) {
1081 case 0 ... 1:
1082 if (SYN_CAP_MULTIFINGER(info->capabilities))
1083 num_fingers = hw.w + 2;
1084 break;
1085 case 2:
1086 if (SYN_MODEL_PEN(info->model_id))
1087 ; /* Nothing, treat a pen as a single finger */
1088 break;
1089 case 4 ... 15:
1090 if (SYN_CAP_PALMDETECT(info->capabilities))
1091 finger_width = hw.w;
1092 break;
1093 }
1094 }
1095 } else {
1096 num_fingers = 0;
1097 finger_width = 0;
1098 }
1099
1100 if (cr48_profile_sensor) {
1101 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1102 return;
1103 }
1104
1105 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1106 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1107 num_fingers);
1108
1109 /* Post events
1110 * BTN_TOUCH has to be first as mousedev relies on it when doing
1111 * absolute -> relative conversion
1112 */
1113 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1114 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1115
1116 if (num_fingers > 0) {
1117 input_report_abs(dev, ABS_X, hw.x);
1118 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1119 }
1120 input_report_abs(dev, ABS_PRESSURE, hw.z);
1121
1122 if (SYN_CAP_PALMDETECT(info->capabilities))
1123 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1124
1125 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1126 if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1127 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1128 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1129 }
1130
1131 synaptics_report_buttons(psmouse, &hw);
1132
1133 input_sync(dev);
1134 }
1135
1136 static bool synaptics_validate_byte(struct psmouse *psmouse,
1137 int idx, enum synaptics_pkt_type pkt_type)
1138 {
1139 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1140 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1141 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1142 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1143 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1144 const u8 *packet = psmouse->packet;
1145
1146 if (idx < 0 || idx > 4)
1147 return false;
1148
1149 switch (pkt_type) {
1150
1151 case SYN_NEWABS:
1152 case SYN_NEWABS_RELAXED:
1153 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1154
1155 case SYN_NEWABS_STRICT:
1156 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1157
1158 case SYN_OLDABS:
1159 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1160
1161 default:
1162 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1163 return false;
1164 }
1165 }
1166
1167 static enum synaptics_pkt_type
1168 synaptics_detect_pkt_type(struct psmouse *psmouse)
1169 {
1170 int i;
1171
1172 for (i = 0; i < 5; i++) {
1173 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1174 psmouse_info(psmouse, "using relaxed packet validation\n");
1175 return SYN_NEWABS_RELAXED;
1176 }
1177 }
1178
1179 return SYN_NEWABS_STRICT;
1180 }
1181
1182 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1183 {
1184 struct synaptics_data *priv = psmouse->private;
1185
1186 if (psmouse->pktcnt >= 6) { /* Full packet received */
1187 if (unlikely(priv->pkt_type == SYN_NEWABS))
1188 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1189
1190 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1191 synaptics_is_pt_packet(psmouse->packet)) {
1192 if (priv->pt_port)
1193 synaptics_pass_pt_packet(priv->pt_port,
1194 psmouse->packet);
1195 } else
1196 synaptics_process_packet(psmouse);
1197
1198 return PSMOUSE_FULL_PACKET;
1199 }
1200
1201 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1202 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1203 }
1204
1205 /*****************************************************************************
1206 * Driver initialization/cleanup functions
1207 ****************************************************************************/
1208 static void set_abs_position_params(struct input_dev *dev,
1209 struct synaptics_device_info *info,
1210 int x_code, int y_code)
1211 {
1212 int x_min = info->x_min ?: XMIN_NOMINAL;
1213 int x_max = info->x_max ?: XMAX_NOMINAL;
1214 int y_min = info->y_min ?: YMIN_NOMINAL;
1215 int y_max = info->y_max ?: YMAX_NOMINAL;
1216 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1217 SYN_REDUCED_FILTER_FUZZ : 0;
1218
1219 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1220 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1221 input_abs_set_res(dev, x_code, info->x_res);
1222 input_abs_set_res(dev, y_code, info->y_res);
1223 }
1224
1225 static void set_input_params(struct psmouse *psmouse,
1226 struct synaptics_data *priv)
1227 {
1228 struct input_dev *dev = psmouse->dev;
1229 struct synaptics_device_info *info = &priv->info;
1230 int i;
1231
1232 /* Things that apply to both modes */
1233 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1234 __set_bit(EV_KEY, dev->evbit);
1235 __set_bit(BTN_LEFT, dev->keybit);
1236 __set_bit(BTN_RIGHT, dev->keybit);
1237
1238 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1239 __set_bit(BTN_MIDDLE, dev->keybit);
1240
1241 if (!priv->absolute_mode) {
1242 /* Relative mode */
1243 __set_bit(EV_REL, dev->evbit);
1244 __set_bit(REL_X, dev->relbit);
1245 __set_bit(REL_Y, dev->relbit);
1246 return;
1247 }
1248
1249 /* Absolute mode */
1250 __set_bit(EV_ABS, dev->evbit);
1251 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1252 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1253
1254 if (cr48_profile_sensor)
1255 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1256
1257 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1258 set_abs_position_params(dev, info,
1259 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1260 /* Image sensors can report per-contact pressure */
1261 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1262 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1263
1264 /* Image sensors can signal 4 and 5 finger clicks */
1265 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1266 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1267 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1268 set_abs_position_params(dev, info,
1269 ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1270 /*
1271 * Profile sensor in CR-48 tracks contacts reasonably well,
1272 * other non-image sensors with AGM use semi-mt.
1273 */
1274 input_mt_init_slots(dev, 2,
1275 INPUT_MT_POINTER |
1276 (cr48_profile_sensor ?
1277 INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1278 }
1279
1280 if (SYN_CAP_PALMDETECT(info->capabilities))
1281 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1282
1283 __set_bit(BTN_TOUCH, dev->keybit);
1284 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1285
1286 if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1287 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1288 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1289 }
1290
1291 if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1292 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1293 __set_bit(BTN_FORWARD, dev->keybit);
1294 __set_bit(BTN_BACK, dev->keybit);
1295 }
1296
1297 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1298 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1299 __set_bit(BTN_0 + i, dev->keybit);
1300
1301 __clear_bit(EV_REL, dev->evbit);
1302 __clear_bit(REL_X, dev->relbit);
1303 __clear_bit(REL_Y, dev->relbit);
1304
1305 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1306 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1307 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1308 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1309 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1310 /* Clickpads report only left button */
1311 __clear_bit(BTN_RIGHT, dev->keybit);
1312 __clear_bit(BTN_MIDDLE, dev->keybit);
1313 }
1314 }
1315
1316 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1317 void *data, char *buf)
1318 {
1319 struct synaptics_data *priv = psmouse->private;
1320
1321 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1322 }
1323
1324 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1325 void *data, const char *buf,
1326 size_t len)
1327 {
1328 struct synaptics_data *priv = psmouse->private;
1329 unsigned int value;
1330 int err;
1331
1332 err = kstrtouint(buf, 10, &value);
1333 if (err)
1334 return err;
1335
1336 if (value > 1)
1337 return -EINVAL;
1338
1339 if (value == priv->disable_gesture)
1340 return len;
1341
1342 priv->disable_gesture = value;
1343 if (value)
1344 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1345 else
1346 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1347
1348 if (synaptics_mode_cmd(psmouse, priv->mode))
1349 return -EIO;
1350
1351 return len;
1352 }
1353
1354 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1355 synaptics_show_disable_gesture,
1356 synaptics_set_disable_gesture);
1357
1358 static void synaptics_disconnect(struct psmouse *psmouse)
1359 {
1360 struct synaptics_data *priv = psmouse->private;
1361
1362 /*
1363 * We might have left a breadcrumb when trying to
1364 * set up SMbus companion.
1365 */
1366 psmouse_smbus_cleanup(psmouse);
1367
1368 if (!priv->absolute_mode &&
1369 SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1370 device_remove_file(&psmouse->ps2dev.serio->dev,
1371 &psmouse_attr_disable_gesture.dattr);
1372
1373 synaptics_reset(psmouse);
1374 kfree(priv);
1375 psmouse->private = NULL;
1376 }
1377
1378 static int synaptics_reconnect(struct psmouse *psmouse)
1379 {
1380 struct synaptics_data *priv = psmouse->private;
1381 struct synaptics_device_info info;
1382 u8 param[2];
1383 int retry = 0;
1384 int error;
1385
1386 do {
1387 psmouse_reset(psmouse);
1388 if (retry) {
1389 /*
1390 * On some boxes, right after resuming, the touchpad
1391 * needs some time to finish initializing (I assume
1392 * it needs time to calibrate) and start responding
1393 * to Synaptics-specific queries, so let's wait a
1394 * bit.
1395 */
1396 ssleep(1);
1397 }
1398 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1399 error = synaptics_detect(psmouse, 0);
1400 } while (error && ++retry < 3);
1401
1402 if (error)
1403 return error;
1404
1405 if (retry > 1)
1406 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1407
1408 error = synaptics_query_hardware(psmouse, &info);
1409 if (error) {
1410 psmouse_err(psmouse, "Unable to query device.\n");
1411 return error;
1412 }
1413
1414 error = synaptics_set_mode(psmouse);
1415 if (error) {
1416 psmouse_err(psmouse, "Unable to initialize device.\n");
1417 return error;
1418 }
1419
1420 if (info.identity != priv->info.identity ||
1421 info.model_id != priv->info.model_id ||
1422 info.capabilities != priv->info.capabilities ||
1423 info.ext_cap != priv->info.ext_cap) {
1424 psmouse_err(psmouse,
1425 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1426 priv->info.identity, info.identity,
1427 priv->info.model_id, info.model_id,
1428 priv->info.capabilities, info.capabilities,
1429 priv->info.ext_cap, info.ext_cap);
1430 return -ENXIO;
1431 }
1432
1433 return 0;
1434 }
1435
1436 static bool impaired_toshiba_kbc;
1437
1438 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1439 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1440 {
1441 /* Toshiba Satellite */
1442 .matches = {
1443 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1444 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1445 },
1446 },
1447 {
1448 /* Toshiba Dynabook */
1449 .matches = {
1450 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1451 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1452 },
1453 },
1454 {
1455 /* Toshiba Portege M300 */
1456 .matches = {
1457 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1458 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1459 },
1460
1461 },
1462 {
1463 /* Toshiba Portege M300 */
1464 .matches = {
1465 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1466 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1467 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1468 },
1469
1470 },
1471 #endif
1472 { }
1473 };
1474
1475 static bool broken_olpc_ec;
1476
1477 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1478 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1479 {
1480 /* OLPC XO-1 or XO-1.5 */
1481 .matches = {
1482 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1483 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1484 },
1485 },
1486 #endif
1487 { }
1488 };
1489
1490 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1491 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1492 {
1493 /* Cr-48 Chromebook (Codename Mario) */
1494 .matches = {
1495 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1496 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1497 },
1498 },
1499 #endif
1500 { }
1501 };
1502
1503 void __init synaptics_module_init(void)
1504 {
1505 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1506 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1507 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1508 }
1509
1510 static int synaptics_init_ps2(struct psmouse *psmouse,
1511 struct synaptics_device_info *info,
1512 bool absolute_mode)
1513 {
1514 struct synaptics_data *priv;
1515 int err;
1516
1517 synaptics_apply_quirks(psmouse, info);
1518
1519 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1520 if (!priv)
1521 return -ENOMEM;
1522
1523 priv->info = *info;
1524 priv->absolute_mode = absolute_mode;
1525 if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1526 priv->disable_gesture = true;
1527
1528 /*
1529 * Unfortunately ForcePad capability is not exported over PS/2,
1530 * so we have to resort to checking PNP IDs.
1531 */
1532 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1533
1534 err = synaptics_set_mode(psmouse);
1535 if (err) {
1536 psmouse_err(psmouse, "Unable to initialize device.\n");
1537 goto init_fail;
1538 }
1539
1540 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1541 SYN_NEWABS : SYN_OLDABS;
1542
1543 psmouse_info(psmouse,
1544 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1545 SYN_ID_MODEL(info->identity),
1546 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1547 info->model_id,
1548 info->capabilities, info->ext_cap, info->ext_cap_0c,
1549 info->ext_cap_10, info->board_id, info->firmware_id);
1550
1551 set_input_params(psmouse, priv);
1552
1553 /*
1554 * Encode touchpad model so that it can be used to set
1555 * input device->id.version and be visible to userspace.
1556 * Because version is __u16 we have to drop something.
1557 * Hardware info bits seem to be good candidates as they
1558 * are documented to be for Synaptics corp. internal use.
1559 */
1560 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1561 (info->model_id & 0x000000ff);
1562
1563 if (absolute_mode) {
1564 psmouse->protocol_handler = synaptics_process_byte;
1565 psmouse->pktsize = 6;
1566 } else {
1567 /* Relative mode follows standard PS/2 mouse protocol */
1568 psmouse->protocol_handler = psmouse_process_byte;
1569 psmouse->pktsize = 3;
1570 }
1571
1572 psmouse->set_rate = synaptics_set_rate;
1573 psmouse->disconnect = synaptics_disconnect;
1574 psmouse->reconnect = synaptics_reconnect;
1575 psmouse->cleanup = synaptics_reset;
1576 /* Synaptics can usually stay in sync without extra help */
1577 psmouse->resync_time = 0;
1578
1579 if (SYN_CAP_PASS_THROUGH(info->capabilities))
1580 synaptics_pt_create(psmouse);
1581
1582 /*
1583 * Toshiba's KBC seems to have trouble handling data from
1584 * Synaptics at full rate. Switch to a lower rate (roughly
1585 * the same rate as a standard PS/2 mouse).
1586 */
1587 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1588 psmouse_info(psmouse,
1589 "Toshiba %s detected, limiting rate to 40pps.\n",
1590 dmi_get_system_info(DMI_PRODUCT_NAME));
1591 psmouse->rate = 40;
1592 }
1593
1594 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1595 err = device_create_file(&psmouse->ps2dev.serio->dev,
1596 &psmouse_attr_disable_gesture.dattr);
1597 if (err) {
1598 psmouse_err(psmouse,
1599 "Failed to create disable_gesture attribute (%d)",
1600 err);
1601 goto init_fail;
1602 }
1603 }
1604
1605 return 0;
1606
1607 init_fail:
1608 kfree(priv);
1609 return err;
1610 }
1611
1612 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1613 {
1614 struct synaptics_device_info info;
1615 int error;
1616
1617 psmouse_reset(psmouse);
1618
1619 error = synaptics_query_hardware(psmouse, &info);
1620 if (error) {
1621 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1622 return error;
1623 }
1624
1625 return synaptics_init_ps2(psmouse, &info, absolute_mode);
1626 }
1627
1628 int synaptics_init_absolute(struct psmouse *psmouse)
1629 {
1630 return __synaptics_init(psmouse, true);
1631 }
1632
1633 int synaptics_init_relative(struct psmouse *psmouse)
1634 {
1635 return __synaptics_init(psmouse, false);
1636 }
1637
1638 static int synaptics_setup_ps2(struct psmouse *psmouse,
1639 struct synaptics_device_info *info)
1640 {
1641 bool absolute_mode = true;
1642 int error;
1643
1644 /*
1645 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1646 * packet spew overloads the EC such that key presses on the keyboard
1647 * are missed. Given that, don't even attempt to use Absolute mode.
1648 * Relative mode seems to work just fine.
1649 */
1650 if (broken_olpc_ec) {
1651 psmouse_info(psmouse,
1652 "OLPC XO detected, forcing relative protocol.\n");
1653 absolute_mode = false;
1654 }
1655
1656 error = synaptics_init_ps2(psmouse, info, absolute_mode);
1657 if (error)
1658 return error;
1659
1660 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1661 }
1662
1663 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1664
1665 void __init synaptics_module_init(void)
1666 {
1667 }
1668
1669 static int __maybe_unused
1670 synaptics_setup_ps2(struct psmouse *psmouse,
1671 struct synaptics_device_info *info)
1672 {
1673 return -ENOSYS;
1674 }
1675
1676 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1677
1678 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1679
1680 /*
1681 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1682 * provides a better bandwidth and allow a better control of the touchpads.
1683 * This is used to decide if we need to use this bus or not.
1684 */
1685 enum {
1686 SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1687 SYNAPTICS_INTERTOUCH_OFF,
1688 SYNAPTICS_INTERTOUCH_ON,
1689 };
1690
1691 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1692 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1693 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1694 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1695
1696 static int synaptics_create_intertouch(struct psmouse *psmouse,
1697 struct synaptics_device_info *info,
1698 bool leave_breadcrumbs)
1699 {
1700 bool topbuttonpad =
1701 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1702 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1703 const struct rmi_device_platform_data pdata = {
1704 .sensor_pdata = {
1705 .sensor_type = rmi_sensor_touchpad,
1706 .axis_align.flip_y = true,
1707 /* to prevent cursors jumps: */
1708 .kernel_tracking = true,
1709 .topbuttonpad = topbuttonpad,
1710 },
1711 .f30_data = {
1712 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1713 .trackstick_buttons =
1714 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1715 },
1716 };
1717 const struct i2c_board_info intertouch_board = {
1718 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1719 .flags = I2C_CLIENT_HOST_NOTIFY,
1720 };
1721
1722 return psmouse_smbus_init(psmouse, &intertouch_board,
1723 &pdata, sizeof(pdata),
1724 leave_breadcrumbs);
1725 }
1726
1727 /**
1728 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1729 * and decides to instantiate a SMBus InterTouch device.
1730 */
1731 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1732 struct synaptics_device_info *info,
1733 bool leave_breadcrumbs)
1734 {
1735 int error;
1736
1737 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1738 return -ENXIO;
1739
1740 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1741 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1742 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1743
1744 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1745 psmouse_info(psmouse,
1746 "Your touchpad (%s) says it can support a different bus. "
1747 "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",
1748 psmouse->ps2dev.serio->firmware_id);
1749
1750 return -ENXIO;
1751 }
1752 }
1753
1754 psmouse_info(psmouse, "Trying to set up SMBus access\n");
1755
1756 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1757 if (error) {
1758 if (error == -EAGAIN)
1759 psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1760 else
1761 psmouse_err(psmouse, "unable to create intertouch device\n");
1762
1763 return error;
1764 }
1765
1766 return 0;
1767 }
1768
1769 int synaptics_init_smbus(struct psmouse *psmouse)
1770 {
1771 struct synaptics_device_info info;
1772 int error;
1773
1774 psmouse_reset(psmouse);
1775
1776 error = synaptics_query_hardware(psmouse, &info);
1777 if (error) {
1778 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1779 return error;
1780 }
1781
1782 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1783 return -ENXIO;
1784
1785 return synaptics_create_intertouch(psmouse, &info, false);
1786 }
1787
1788 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1789
1790 static int __maybe_unused
1791 synaptics_setup_intertouch(struct psmouse *psmouse,
1792 struct synaptics_device_info *info,
1793 bool leave_breadcrumbs)
1794 {
1795 return -ENOSYS;
1796 }
1797
1798 int synaptics_init_smbus(struct psmouse *psmouse)
1799 {
1800 return -ENOSYS;
1801 }
1802
1803 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1804
1805 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1806 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1807
1808 int synaptics_init(struct psmouse *psmouse)
1809 {
1810 struct synaptics_device_info info;
1811 int error;
1812 int retval;
1813
1814 psmouse_reset(psmouse);
1815
1816 error = synaptics_query_hardware(psmouse, &info);
1817 if (error) {
1818 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1819 return error;
1820 }
1821
1822 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1823 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1824 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1825 /* Forcepads need F21, which is not ready */
1826 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1827 psmouse_warn(psmouse,
1828 "The touchpad can support a better bus than the too old PS/2 protocol. "
1829 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1830 }
1831
1832 error = synaptics_setup_intertouch(psmouse, &info, true);
1833 if (!error)
1834 return PSMOUSE_SYNAPTICS_SMBUS;
1835 }
1836
1837 retval = synaptics_setup_ps2(psmouse, &info);
1838 if (retval < 0) {
1839 /*
1840 * Not using any flavor of Synaptics support, so clean up
1841 * SMbus breadcrumbs, if any.
1842 */
1843 psmouse_smbus_cleanup(psmouse);
1844 }
1845
1846 return retval;
1847 }
1848
1849 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1850
1851 int synaptics_init(struct psmouse *psmouse)
1852 {
1853 return -ENOSYS;
1854 }
1855
1856 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
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