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Merge tag 'master-2014-11-25' of git://git.kernel.org/pub/scm/linux/kernel/git/linvil...
[deliverable/linux.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/slab.h>
33 #include "psmouse.h"
34 #include "synaptics.h"
35
36 /*
37 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
38 * section 2.3.2, which says that they should be valid regardless of the
39 * actual size of the sensor.
40 * Note that newer firmware allows querying device for maximum useable
41 * coordinates.
42 */
43 #define XMIN 0
44 #define XMAX 6143
45 #define YMIN 0
46 #define YMAX 6143
47 #define XMIN_NOMINAL 1472
48 #define XMAX_NOMINAL 5472
49 #define YMIN_NOMINAL 1408
50 #define YMAX_NOMINAL 4448
51
52 /* Size in bits of absolute position values reported by the hardware */
53 #define ABS_POS_BITS 13
54
55 /*
56 * These values should represent the absolute maximum value that will
57 * be reported for a positive position value. Some Synaptics firmware
58 * uses this value to indicate a finger near the edge of the touchpad
59 * whose precise position cannot be determined.
60 *
61 * At least one touchpad is known to report positions in excess of this
62 * value which are actually negative values truncated to the 13-bit
63 * reporting range. These values have never been observed to be lower
64 * than 8184 (i.e. -8), so we treat all values greater than 8176 as
65 * negative and any other value as positive.
66 */
67 #define X_MAX_POSITIVE 8176
68 #define Y_MAX_POSITIVE 8176
69
70 /*****************************************************************************
71 * Stuff we need even when we do not want native Synaptics support
72 ****************************************************************************/
73
74 /*
75 * Set the synaptics touchpad mode byte by special commands
76 */
77 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
78 {
79 unsigned char param[1];
80
81 if (psmouse_sliced_command(psmouse, mode))
82 return -1;
83 param[0] = SYN_PS_SET_MODE2;
84 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
85 return -1;
86 return 0;
87 }
88
89 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
90 {
91 struct ps2dev *ps2dev = &psmouse->ps2dev;
92 unsigned char param[4];
93
94 param[0] = 0;
95
96 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
97 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
98 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
99 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
100 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
101
102 if (param[1] != 0x47)
103 return -ENODEV;
104
105 if (set_properties) {
106 psmouse->vendor = "Synaptics";
107 psmouse->name = "TouchPad";
108 }
109
110 return 0;
111 }
112
113 void synaptics_reset(struct psmouse *psmouse)
114 {
115 /* reset touchpad back to relative mode, gestures enabled */
116 synaptics_mode_cmd(psmouse, 0);
117 }
118
119 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
120
121 static bool cr48_profile_sensor;
122
123 struct min_max_quirk {
124 const char * const *pnp_ids;
125 int x_min, x_max, y_min, y_max;
126 };
127
128 static const struct min_max_quirk min_max_pnpid_table[] = {
129 {
130 (const char * const []){"LEN0033", NULL},
131 1024, 5052, 2258, 4832
132 },
133 {
134 (const char * const []){"LEN0035", "LEN0042", NULL},
135 1232, 5710, 1156, 4696
136 },
137 {
138 (const char * const []){"LEN0034", "LEN0036", "LEN0039",
139 "LEN2002", "LEN2004", NULL},
140 1024, 5112, 2024, 4832
141 },
142 {
143 (const char * const []){"LEN2001", NULL},
144 1024, 5022, 2508, 4832
145 },
146 { }
147 };
148
149 /* This list has been kindly provided by Synaptics. */
150 static const char * const topbuttonpad_pnp_ids[] = {
151 "LEN0017",
152 "LEN0018",
153 "LEN0019",
154 "LEN0023",
155 "LEN002A",
156 "LEN002B",
157 "LEN002C",
158 "LEN002D",
159 "LEN002E",
160 "LEN0033", /* Helix */
161 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
162 "LEN0035", /* X240 */
163 "LEN0036", /* T440 */
164 "LEN0037",
165 "LEN0038",
166 "LEN0039", /* T440s */
167 "LEN0041",
168 "LEN0042", /* Yoga */
169 "LEN0045",
170 "LEN0046",
171 "LEN0047",
172 "LEN0048",
173 "LEN0049",
174 "LEN2000",
175 "LEN2001", /* Edge E431 */
176 "LEN2002", /* Edge E531 */
177 "LEN2003",
178 "LEN2004", /* L440 */
179 "LEN2005",
180 "LEN2006",
181 "LEN2007",
182 "LEN2008",
183 "LEN2009",
184 "LEN200A",
185 "LEN200B",
186 NULL
187 };
188
189 /*****************************************************************************
190 * Synaptics communications functions
191 ****************************************************************************/
192
193 /*
194 * Synaptics touchpads report the y coordinate from bottom to top, which is
195 * opposite from what userspace expects.
196 * This function is used to invert y before reporting.
197 */
198 static int synaptics_invert_y(int y)
199 {
200 return YMAX_NOMINAL + YMIN_NOMINAL - y;
201 }
202
203 /*
204 * Send a command to the synpatics touchpad by special commands
205 */
206 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
207 {
208 if (psmouse_sliced_command(psmouse, c))
209 return -1;
210 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
211 return -1;
212 return 0;
213 }
214
215 /*
216 * Read the model-id bytes from the touchpad
217 * see also SYN_MODEL_* macros
218 */
219 static int synaptics_model_id(struct psmouse *psmouse)
220 {
221 struct synaptics_data *priv = psmouse->private;
222 unsigned char mi[3];
223
224 if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
225 return -1;
226 priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
227 return 0;
228 }
229
230 /*
231 * Read the board id from the touchpad
232 * The board id is encoded in the "QUERY MODES" response
233 */
234 static int synaptics_board_id(struct psmouse *psmouse)
235 {
236 struct synaptics_data *priv = psmouse->private;
237 unsigned char bid[3];
238
239 if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
240 return -1;
241 priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
242 return 0;
243 }
244
245 /*
246 * Read the firmware id from the touchpad
247 */
248 static int synaptics_firmware_id(struct psmouse *psmouse)
249 {
250 struct synaptics_data *priv = psmouse->private;
251 unsigned char fwid[3];
252
253 if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
254 return -1;
255 priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
256 return 0;
257 }
258
259 /*
260 * Read the capability-bits from the touchpad
261 * see also the SYN_CAP_* macros
262 */
263 static int synaptics_capability(struct psmouse *psmouse)
264 {
265 struct synaptics_data *priv = psmouse->private;
266 unsigned char cap[3];
267
268 if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
269 return -1;
270 priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
271 priv->ext_cap = priv->ext_cap_0c = 0;
272
273 /*
274 * Older firmwares had submodel ID fixed to 0x47
275 */
276 if (SYN_ID_FULL(priv->identity) < 0x705 &&
277 SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
278 return -1;
279 }
280
281 /*
282 * Unless capExtended is set the rest of the flags should be ignored
283 */
284 if (!SYN_CAP_EXTENDED(priv->capabilities))
285 priv->capabilities = 0;
286
287 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
288 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
289 psmouse_warn(psmouse,
290 "device claims to have extended capabilities, but I'm not able to read them.\n");
291 } else {
292 priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
293
294 /*
295 * if nExtBtn is greater than 8 it should be considered
296 * invalid and treated as 0
297 */
298 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
299 priv->ext_cap &= 0xff0fff;
300 }
301 }
302
303 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
304 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
305 psmouse_warn(psmouse,
306 "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
307 } else {
308 priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
309 }
310 }
311
312 return 0;
313 }
314
315 /*
316 * Identify Touchpad
317 * See also the SYN_ID_* macros
318 */
319 static int synaptics_identify(struct psmouse *psmouse)
320 {
321 struct synaptics_data *priv = psmouse->private;
322 unsigned char id[3];
323
324 if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
325 return -1;
326 priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
327 if (SYN_ID_IS_SYNAPTICS(priv->identity))
328 return 0;
329 return -1;
330 }
331
332 /*
333 * Read touchpad resolution and maximum reported coordinates
334 * Resolution is left zero if touchpad does not support the query
335 */
336
337 static int synaptics_resolution(struct psmouse *psmouse)
338 {
339 struct synaptics_data *priv = psmouse->private;
340 unsigned char resp[3];
341 int i;
342
343 if (SYN_ID_MAJOR(priv->identity) < 4)
344 return 0;
345
346 if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
347 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
348 priv->x_res = resp[0]; /* x resolution in units/mm */
349 priv->y_res = resp[2]; /* y resolution in units/mm */
350 }
351 }
352
353 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
354 if (psmouse_matches_pnp_id(psmouse,
355 min_max_pnpid_table[i].pnp_ids)) {
356 priv->x_min = min_max_pnpid_table[i].x_min;
357 priv->x_max = min_max_pnpid_table[i].x_max;
358 priv->y_min = min_max_pnpid_table[i].y_min;
359 priv->y_max = min_max_pnpid_table[i].y_max;
360 return 0;
361 }
362 }
363
364 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
365 SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
366 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
367 psmouse_warn(psmouse,
368 "device claims to have max coordinates query, but I'm not able to read it.\n");
369 } else {
370 priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
371 priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
372 }
373 }
374
375 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
376 SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
377 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
378 psmouse_warn(psmouse,
379 "device claims to have min coordinates query, but I'm not able to read it.\n");
380 } else {
381 priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
382 priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
383 }
384 }
385
386 return 0;
387 }
388
389 static int synaptics_query_hardware(struct psmouse *psmouse)
390 {
391 if (synaptics_identify(psmouse))
392 return -1;
393 if (synaptics_model_id(psmouse))
394 return -1;
395 if (synaptics_firmware_id(psmouse))
396 return -1;
397 if (synaptics_board_id(psmouse))
398 return -1;
399 if (synaptics_capability(psmouse))
400 return -1;
401 if (synaptics_resolution(psmouse))
402 return -1;
403
404 return 0;
405 }
406
407 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
408 {
409 static unsigned char param = 0xc8;
410 struct synaptics_data *priv = psmouse->private;
411
412 if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
413 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
414 return 0;
415
416 if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
417 return -1;
418
419 if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
420 return -1;
421
422 /* Advanced gesture mode also sends multi finger data */
423 priv->capabilities |= BIT(1);
424
425 return 0;
426 }
427
428 static int synaptics_set_mode(struct psmouse *psmouse)
429 {
430 struct synaptics_data *priv = psmouse->private;
431
432 priv->mode = 0;
433 if (priv->absolute_mode)
434 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
435 if (priv->disable_gesture)
436 priv->mode |= SYN_BIT_DISABLE_GESTURE;
437 if (psmouse->rate >= 80)
438 priv->mode |= SYN_BIT_HIGH_RATE;
439 if (SYN_CAP_EXTENDED(priv->capabilities))
440 priv->mode |= SYN_BIT_W_MODE;
441
442 if (synaptics_mode_cmd(psmouse, priv->mode))
443 return -1;
444
445 if (priv->absolute_mode &&
446 synaptics_set_advanced_gesture_mode(psmouse)) {
447 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
448 return -1;
449 }
450
451 return 0;
452 }
453
454 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
455 {
456 struct synaptics_data *priv = psmouse->private;
457
458 if (rate >= 80) {
459 priv->mode |= SYN_BIT_HIGH_RATE;
460 psmouse->rate = 80;
461 } else {
462 priv->mode &= ~SYN_BIT_HIGH_RATE;
463 psmouse->rate = 40;
464 }
465
466 synaptics_mode_cmd(psmouse, priv->mode);
467 }
468
469 /*****************************************************************************
470 * Synaptics pass-through PS/2 port support
471 ****************************************************************************/
472 static int synaptics_pt_write(struct serio *serio, unsigned char c)
473 {
474 struct psmouse *parent = serio_get_drvdata(serio->parent);
475 char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
476
477 if (psmouse_sliced_command(parent, c))
478 return -1;
479 if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
480 return -1;
481 return 0;
482 }
483
484 static int synaptics_pt_start(struct serio *serio)
485 {
486 struct psmouse *parent = serio_get_drvdata(serio->parent);
487 struct synaptics_data *priv = parent->private;
488
489 serio_pause_rx(parent->ps2dev.serio);
490 priv->pt_port = serio;
491 serio_continue_rx(parent->ps2dev.serio);
492
493 return 0;
494 }
495
496 static void synaptics_pt_stop(struct serio *serio)
497 {
498 struct psmouse *parent = serio_get_drvdata(serio->parent);
499 struct synaptics_data *priv = parent->private;
500
501 serio_pause_rx(parent->ps2dev.serio);
502 priv->pt_port = NULL;
503 serio_continue_rx(parent->ps2dev.serio);
504 }
505
506 static int synaptics_is_pt_packet(unsigned char *buf)
507 {
508 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
509 }
510
511 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
512 {
513 struct psmouse *child = serio_get_drvdata(ptport);
514
515 if (child && child->state == PSMOUSE_ACTIVATED) {
516 serio_interrupt(ptport, packet[1], 0);
517 serio_interrupt(ptport, packet[4], 0);
518 serio_interrupt(ptport, packet[5], 0);
519 if (child->pktsize == 4)
520 serio_interrupt(ptport, packet[2], 0);
521 } else
522 serio_interrupt(ptport, packet[1], 0);
523 }
524
525 static void synaptics_pt_activate(struct psmouse *psmouse)
526 {
527 struct synaptics_data *priv = psmouse->private;
528 struct psmouse *child = serio_get_drvdata(priv->pt_port);
529
530 /* adjust the touchpad to child's choice of protocol */
531 if (child) {
532 if (child->pktsize == 4)
533 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
534 else
535 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
536
537 if (synaptics_mode_cmd(psmouse, priv->mode))
538 psmouse_warn(psmouse,
539 "failed to switch guest protocol\n");
540 }
541 }
542
543 static void synaptics_pt_create(struct psmouse *psmouse)
544 {
545 struct serio *serio;
546
547 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
548 if (!serio) {
549 psmouse_err(psmouse,
550 "not enough memory for pass-through port\n");
551 return;
552 }
553
554 serio->id.type = SERIO_PS_PSTHRU;
555 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
556 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
557 serio->write = synaptics_pt_write;
558 serio->start = synaptics_pt_start;
559 serio->stop = synaptics_pt_stop;
560 serio->parent = psmouse->ps2dev.serio;
561
562 psmouse->pt_activate = synaptics_pt_activate;
563
564 psmouse_info(psmouse, "serio: %s port at %s\n",
565 serio->name, psmouse->phys);
566 serio_register_port(serio);
567 }
568
569 /*****************************************************************************
570 * Functions to interpret the absolute mode packets
571 ****************************************************************************/
572
573 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
574 int sgm, int agm)
575 {
576 state->count = count;
577 state->sgm = sgm;
578 state->agm = agm;
579 }
580
581 static void synaptics_parse_agm(const unsigned char buf[],
582 struct synaptics_data *priv,
583 struct synaptics_hw_state *hw)
584 {
585 struct synaptics_hw_state *agm = &priv->agm;
586 int agm_packet_type;
587
588 agm_packet_type = (buf[5] & 0x30) >> 4;
589 switch (agm_packet_type) {
590 case 1:
591 /* Gesture packet: (x, y, z) half resolution */
592 agm->w = hw->w;
593 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
594 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
595 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
596 break;
597
598 case 2:
599 /* AGM-CONTACT packet: (count, sgm, agm) */
600 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
601 break;
602
603 default:
604 break;
605 }
606
607 /* Record that at least one AGM has been received since last SGM */
608 priv->agm_pending = true;
609 }
610
611 static bool is_forcepad;
612
613 static int synaptics_parse_hw_state(const unsigned char buf[],
614 struct synaptics_data *priv,
615 struct synaptics_hw_state *hw)
616 {
617 memset(hw, 0, sizeof(struct synaptics_hw_state));
618
619 if (SYN_MODEL_NEWABS(priv->model_id)) {
620 hw->w = (((buf[0] & 0x30) >> 2) |
621 ((buf[0] & 0x04) >> 1) |
622 ((buf[3] & 0x04) >> 2));
623
624 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
625 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
626 hw->w == 2) {
627 synaptics_parse_agm(buf, priv, hw);
628 return 1;
629 }
630
631 hw->x = (((buf[3] & 0x10) << 8) |
632 ((buf[1] & 0x0f) << 8) |
633 buf[4]);
634 hw->y = (((buf[3] & 0x20) << 7) |
635 ((buf[1] & 0xf0) << 4) |
636 buf[5]);
637 hw->z = buf[2];
638
639 hw->left = (buf[0] & 0x01) ? 1 : 0;
640 hw->right = (buf[0] & 0x02) ? 1 : 0;
641
642 if (is_forcepad) {
643 /*
644 * ForcePads, like Clickpads, use middle button
645 * bits to report primary button clicks.
646 * Unfortunately they report primary button not
647 * only when user presses on the pad above certain
648 * threshold, but also when there are more than one
649 * finger on the touchpad, which interferes with
650 * out multi-finger gestures.
651 */
652 if (hw->z == 0) {
653 /* No contacts */
654 priv->press = priv->report_press = false;
655 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
656 /*
657 * Single-finger touch with pressure above
658 * the threshold. If pressure stays long
659 * enough, we'll start reporting primary
660 * button. We rely on the device continuing
661 * sending data even if finger does not
662 * move.
663 */
664 if (!priv->press) {
665 priv->press_start = jiffies;
666 priv->press = true;
667 } else if (time_after(jiffies,
668 priv->press_start +
669 msecs_to_jiffies(50))) {
670 priv->report_press = true;
671 }
672 } else {
673 priv->press = false;
674 }
675
676 hw->left = priv->report_press;
677
678 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
679 /*
680 * Clickpad's button is transmitted as middle button,
681 * however, since it is primary button, we will report
682 * it as BTN_LEFT.
683 */
684 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
685
686 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
687 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
688 if (hw->w == 2)
689 hw->scroll = (signed char)(buf[1]);
690 }
691
692 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
693 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
694 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
695 }
696
697 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
698 ((buf[0] ^ buf[3]) & 0x02)) {
699 switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
700 default:
701 /*
702 * if nExtBtn is greater than 8 it should be
703 * considered invalid and treated as 0
704 */
705 break;
706 case 8:
707 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
708 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
709 case 6:
710 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
711 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
712 case 4:
713 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
714 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
715 case 2:
716 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
717 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
718 }
719 }
720 } else {
721 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
722 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
723
724 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
725 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
726
727 hw->left = (buf[0] & 0x01) ? 1 : 0;
728 hw->right = (buf[0] & 0x02) ? 1 : 0;
729 }
730
731 /*
732 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
733 * is used by some firmware to indicate a finger at the edge of
734 * the touchpad whose precise position cannot be determined, so
735 * convert these values to the maximum axis value.
736 */
737 if (hw->x > X_MAX_POSITIVE)
738 hw->x -= 1 << ABS_POS_BITS;
739 else if (hw->x == X_MAX_POSITIVE)
740 hw->x = XMAX;
741
742 if (hw->y > Y_MAX_POSITIVE)
743 hw->y -= 1 << ABS_POS_BITS;
744 else if (hw->y == Y_MAX_POSITIVE)
745 hw->y = YMAX;
746
747 return 0;
748 }
749
750 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
751 bool active, int x, int y)
752 {
753 input_mt_slot(dev, slot);
754 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
755 if (active) {
756 input_report_abs(dev, ABS_MT_POSITION_X, x);
757 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
758 }
759 }
760
761 static void synaptics_report_semi_mt_data(struct input_dev *dev,
762 const struct synaptics_hw_state *a,
763 const struct synaptics_hw_state *b,
764 int num_fingers)
765 {
766 if (num_fingers >= 2) {
767 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
768 min(a->y, b->y));
769 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
770 max(a->y, b->y));
771 } else if (num_fingers == 1) {
772 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
773 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
774 } else {
775 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
776 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
777 }
778 }
779
780 static void synaptics_report_buttons(struct psmouse *psmouse,
781 const struct synaptics_hw_state *hw)
782 {
783 struct input_dev *dev = psmouse->dev;
784 struct synaptics_data *priv = psmouse->private;
785 int i;
786
787 input_report_key(dev, BTN_LEFT, hw->left);
788 input_report_key(dev, BTN_RIGHT, hw->right);
789
790 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
791 input_report_key(dev, BTN_MIDDLE, hw->middle);
792
793 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
794 input_report_key(dev, BTN_FORWARD, hw->up);
795 input_report_key(dev, BTN_BACK, hw->down);
796 }
797
798 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
799 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
800 }
801
802 static void synaptics_report_slot(struct input_dev *dev, int slot,
803 const struct synaptics_hw_state *hw)
804 {
805 input_mt_slot(dev, slot);
806 input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
807 if (!hw)
808 return;
809
810 input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
811 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
812 input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
813 }
814
815 static void synaptics_report_mt_data(struct psmouse *psmouse,
816 struct synaptics_mt_state *mt_state,
817 const struct synaptics_hw_state *sgm)
818 {
819 struct input_dev *dev = psmouse->dev;
820 struct synaptics_data *priv = psmouse->private;
821 struct synaptics_hw_state *agm = &priv->agm;
822 struct synaptics_mt_state *old = &priv->mt_state;
823
824 switch (mt_state->count) {
825 case 0:
826 synaptics_report_slot(dev, 0, NULL);
827 synaptics_report_slot(dev, 1, NULL);
828 break;
829 case 1:
830 if (mt_state->sgm == -1) {
831 synaptics_report_slot(dev, 0, NULL);
832 synaptics_report_slot(dev, 1, NULL);
833 } else if (mt_state->sgm == 0) {
834 synaptics_report_slot(dev, 0, sgm);
835 synaptics_report_slot(dev, 1, NULL);
836 } else {
837 synaptics_report_slot(dev, 0, NULL);
838 synaptics_report_slot(dev, 1, sgm);
839 }
840 break;
841 default:
842 /*
843 * If the finger slot contained in SGM is valid, and either
844 * hasn't changed, or is new, or the old SGM has now moved to
845 * AGM, then report SGM in MTB slot 0.
846 * Otherwise, empty MTB slot 0.
847 */
848 if (mt_state->sgm != -1 &&
849 (mt_state->sgm == old->sgm ||
850 old->sgm == -1 || mt_state->agm == old->sgm))
851 synaptics_report_slot(dev, 0, sgm);
852 else
853 synaptics_report_slot(dev, 0, NULL);
854
855 /*
856 * If the finger slot contained in AGM is valid, and either
857 * hasn't changed, or is new, then report AGM in MTB slot 1.
858 * Otherwise, empty MTB slot 1.
859 *
860 * However, in the case where the AGM is new, make sure that
861 * that it is either the same as the old SGM, or there was no
862 * SGM.
863 *
864 * Otherwise, if the SGM was just 1, and the new AGM is 2, then
865 * the new AGM will keep the old SGM's tracking ID, which can
866 * cause apparent drumroll. This happens if in the following
867 * valid finger sequence:
868 *
869 * Action SGM AGM (MTB slot:Contact)
870 * 1. Touch contact 0 (0:0)
871 * 2. Touch contact 1 (0:0, 1:1)
872 * 3. Lift contact 0 (1:1)
873 * 4. Touch contacts 2,3 (0:2, 1:3)
874 *
875 * In step 4, contact 3, in AGM must not be given the same
876 * tracking ID as contact 1 had in step 3. To avoid this,
877 * the first agm with contact 3 is dropped and slot 1 is
878 * invalidated (tracking ID = -1).
879 */
880 if (mt_state->agm != -1 &&
881 (mt_state->agm == old->agm ||
882 (old->agm == -1 &&
883 (old->sgm == -1 || mt_state->agm == old->sgm))))
884 synaptics_report_slot(dev, 1, agm);
885 else
886 synaptics_report_slot(dev, 1, NULL);
887 break;
888 }
889
890 /* Don't use active slot count to generate BTN_TOOL events. */
891 input_mt_report_pointer_emulation(dev, false);
892
893 /* Send the number of fingers reported by touchpad itself. */
894 input_mt_report_finger_count(dev, mt_state->count);
895
896 synaptics_report_buttons(psmouse, sgm);
897
898 input_sync(dev);
899 }
900
901 /* Handle case where mt_state->count = 0 */
902 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
903 struct synaptics_mt_state *mt_state)
904 {
905 synaptics_mt_state_set(mt_state, 0, -1, -1);
906 priv->mt_state_lost = false;
907 }
908
909 /* Handle case where mt_state->count = 1 */
910 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
911 struct synaptics_mt_state *mt_state)
912 {
913 struct synaptics_hw_state *agm = &priv->agm;
914 struct synaptics_mt_state *old = &priv->mt_state;
915
916 /*
917 * If the last AGM was (0,0,0), and there is only one finger left,
918 * then we absolutely know that SGM contains slot 0, and all other
919 * fingers have been removed.
920 */
921 if (priv->agm_pending && agm->z == 0) {
922 synaptics_mt_state_set(mt_state, 1, 0, -1);
923 priv->mt_state_lost = false;
924 return;
925 }
926
927 switch (old->count) {
928 case 0:
929 synaptics_mt_state_set(mt_state, 1, 0, -1);
930 break;
931 case 1:
932 /*
933 * If mt_state_lost, then the previous transition was 3->1,
934 * and SGM now contains either slot 0 or 1, but we don't know
935 * which. So, we just assume that the SGM now contains slot 1.
936 *
937 * If pending AGM and either:
938 * (a) the previous SGM slot contains slot 0, or
939 * (b) there was no SGM slot
940 * then, the SGM now contains slot 1
941 *
942 * Case (a) happens with very rapid "drum roll" gestures, where
943 * slot 0 finger is lifted and a new slot 1 finger touches
944 * within one reporting interval.
945 *
946 * Case (b) happens if initially two or more fingers tap
947 * briefly, and all but one lift before the end of the first
948 * reporting interval.
949 *
950 * (In both these cases, slot 0 will becomes empty, so SGM
951 * contains slot 1 with the new finger)
952 *
953 * Else, if there was no previous SGM, it now contains slot 0.
954 *
955 * Otherwise, SGM still contains the same slot.
956 */
957 if (priv->mt_state_lost ||
958 (priv->agm_pending && old->sgm <= 0))
959 synaptics_mt_state_set(mt_state, 1, 1, -1);
960 else if (old->sgm == -1)
961 synaptics_mt_state_set(mt_state, 1, 0, -1);
962 break;
963 case 2:
964 /*
965 * If mt_state_lost, we don't know which finger SGM contains.
966 *
967 * So, report 1 finger, but with both slots empty.
968 * We will use slot 1 on subsequent 1->1
969 */
970 if (priv->mt_state_lost) {
971 synaptics_mt_state_set(mt_state, 1, -1, -1);
972 break;
973 }
974 /*
975 * Since the last AGM was NOT (0,0,0), it was the finger in
976 * slot 0 that has been removed.
977 * So, SGM now contains previous AGM's slot, and AGM is now
978 * empty.
979 */
980 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
981 break;
982 case 3:
983 /*
984 * Since last AGM was not (0,0,0), we don't know which finger
985 * is left.
986 *
987 * So, report 1 finger, but with both slots empty.
988 * We will use slot 1 on subsequent 1->1
989 */
990 synaptics_mt_state_set(mt_state, 1, -1, -1);
991 priv->mt_state_lost = true;
992 break;
993 case 4:
994 case 5:
995 /* mt_state was updated by AGM-CONTACT packet */
996 break;
997 }
998 }
999
1000 /* Handle case where mt_state->count = 2 */
1001 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
1002 struct synaptics_mt_state *mt_state)
1003 {
1004 struct synaptics_mt_state *old = &priv->mt_state;
1005
1006 switch (old->count) {
1007 case 0:
1008 synaptics_mt_state_set(mt_state, 2, 0, 1);
1009 break;
1010 case 1:
1011 /*
1012 * If previous SGM contained slot 1 or higher, SGM now contains
1013 * slot 0 (the newly touching finger) and AGM contains SGM's
1014 * previous slot.
1015 *
1016 * Otherwise, SGM still contains slot 0 and AGM now contains
1017 * slot 1.
1018 */
1019 if (old->sgm >= 1)
1020 synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
1021 else
1022 synaptics_mt_state_set(mt_state, 2, 0, 1);
1023 break;
1024 case 2:
1025 /*
1026 * If mt_state_lost, SGM now contains either finger 1 or 2, but
1027 * we don't know which.
1028 * So, we just assume that the SGM contains slot 0 and AGM 1.
1029 */
1030 if (priv->mt_state_lost)
1031 synaptics_mt_state_set(mt_state, 2, 0, 1);
1032 /*
1033 * Otherwise, use the same mt_state, since it either hasn't
1034 * changed, or was updated by a recently received AGM-CONTACT
1035 * packet.
1036 */
1037 break;
1038 case 3:
1039 /*
1040 * 3->2 transitions have two unsolvable problems:
1041 * 1) no indication is given which finger was removed
1042 * 2) no way to tell if agm packet was for finger 3
1043 * before 3->2, or finger 2 after 3->2.
1044 *
1045 * So, report 2 fingers, but empty all slots.
1046 * We will guess slots [0,1] on subsequent 2->2.
1047 */
1048 synaptics_mt_state_set(mt_state, 2, -1, -1);
1049 priv->mt_state_lost = true;
1050 break;
1051 case 4:
1052 case 5:
1053 /* mt_state was updated by AGM-CONTACT packet */
1054 break;
1055 }
1056 }
1057
1058 /* Handle case where mt_state->count = 3 */
1059 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
1060 struct synaptics_mt_state *mt_state)
1061 {
1062 struct synaptics_mt_state *old = &priv->mt_state;
1063
1064 switch (old->count) {
1065 case 0:
1066 synaptics_mt_state_set(mt_state, 3, 0, 2);
1067 break;
1068 case 1:
1069 /*
1070 * If previous SGM contained slot 2 or higher, SGM now contains
1071 * slot 0 (one of the newly touching fingers) and AGM contains
1072 * SGM's previous slot.
1073 *
1074 * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
1075 */
1076 if (old->sgm >= 2)
1077 synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
1078 else
1079 synaptics_mt_state_set(mt_state, 3, 0, 2);
1080 break;
1081 case 2:
1082 /*
1083 * If the AGM previously contained slot 3 or higher, then the
1084 * newly touching finger is in the lowest available slot.
1085 *
1086 * If SGM was previously 1 or higher, then the new SGM is
1087 * now slot 0 (with a new finger), otherwise, the new finger
1088 * is now in a hidden slot between 0 and AGM's slot.
1089 *
1090 * In all such cases, the SGM now contains slot 0, and the AGM
1091 * continues to contain the same slot as before.
1092 */
1093 if (old->agm >= 3) {
1094 synaptics_mt_state_set(mt_state, 3, 0, old->agm);
1095 break;
1096 }
1097
1098 /*
1099 * After some 3->1 and all 3->2 transitions, we lose track
1100 * of which slot is reported by SGM and AGM.
1101 *
1102 * For 2->3 in this state, report 3 fingers, but empty all
1103 * slots, and we will guess (0,2) on a subsequent 0->3.
1104 *
1105 * To userspace, the resulting transition will look like:
1106 * 2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
1107 */
1108 if (priv->mt_state_lost) {
1109 synaptics_mt_state_set(mt_state, 3, -1, -1);
1110 break;
1111 }
1112
1113 /*
1114 * If the (SGM,AGM) really previously contained slots (0, 1),
1115 * then we cannot know what slot was just reported by the AGM,
1116 * because the 2->3 transition can occur either before or after
1117 * the AGM packet. Thus, this most recent AGM could contain
1118 * either the same old slot 1 or the new slot 2.
1119 * Subsequent AGMs will be reporting slot 2.
1120 *
1121 * To userspace, the resulting transition will look like:
1122 * 2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1123 */
1124 synaptics_mt_state_set(mt_state, 3, 0, -1);
1125 break;
1126 case 3:
1127 /*
1128 * If, for whatever reason, the previous agm was invalid,
1129 * Assume SGM now contains slot 0, AGM now contains slot 2.
1130 */
1131 if (old->agm <= 2)
1132 synaptics_mt_state_set(mt_state, 3, 0, 2);
1133 /*
1134 * mt_state either hasn't changed, or was updated by a recently
1135 * received AGM-CONTACT packet.
1136 */
1137 break;
1138
1139 case 4:
1140 case 5:
1141 /* mt_state was updated by AGM-CONTACT packet */
1142 break;
1143 }
1144 }
1145
1146 /* Handle case where mt_state->count = 4, or = 5 */
1147 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1148 struct synaptics_mt_state *mt_state)
1149 {
1150 /* mt_state was updated correctly by AGM-CONTACT packet */
1151 priv->mt_state_lost = false;
1152 }
1153
1154 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1155 struct synaptics_hw_state *sgm)
1156 {
1157 struct synaptics_data *priv = psmouse->private;
1158 struct synaptics_hw_state *agm = &priv->agm;
1159 struct synaptics_mt_state mt_state;
1160
1161 /* Initialize using current mt_state (as updated by last agm) */
1162 mt_state = agm->mt_state;
1163
1164 /*
1165 * Update mt_state using the new finger count and current mt_state.
1166 */
1167 if (sgm->z == 0)
1168 synaptics_image_sensor_0f(priv, &mt_state);
1169 else if (sgm->w >= 4)
1170 synaptics_image_sensor_1f(priv, &mt_state);
1171 else if (sgm->w == 0)
1172 synaptics_image_sensor_2f(priv, &mt_state);
1173 else if (sgm->w == 1 && mt_state.count <= 3)
1174 synaptics_image_sensor_3f(priv, &mt_state);
1175 else
1176 synaptics_image_sensor_45f(priv, &mt_state);
1177
1178 /* Send resulting input events to user space */
1179 synaptics_report_mt_data(psmouse, &mt_state, sgm);
1180
1181 /* Store updated mt_state */
1182 priv->mt_state = agm->mt_state = mt_state;
1183 priv->agm_pending = false;
1184 }
1185
1186 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
1187 struct synaptics_hw_state *sgm,
1188 int num_fingers)
1189 {
1190 struct input_dev *dev = psmouse->dev;
1191 struct synaptics_data *priv = psmouse->private;
1192 struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1193 struct input_mt_pos pos[2];
1194 int slot[2], nsemi, i;
1195
1196 nsemi = clamp_val(num_fingers, 0, 2);
1197
1198 for (i = 0; i < nsemi; i++) {
1199 pos[i].x = hw[i]->x;
1200 pos[i].y = synaptics_invert_y(hw[i]->y);
1201 }
1202
1203 input_mt_assign_slots(dev, slot, pos, nsemi);
1204
1205 for (i = 0; i < nsemi; i++) {
1206 input_mt_slot(dev, slot[i]);
1207 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1208 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1209 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1210 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1211 }
1212
1213 input_mt_drop_unused(dev);
1214 input_mt_report_pointer_emulation(dev, false);
1215 input_mt_report_finger_count(dev, num_fingers);
1216
1217 synaptics_report_buttons(psmouse, sgm);
1218
1219 input_sync(dev);
1220 }
1221
1222 /*
1223 * called for each full received packet from the touchpad
1224 */
1225 static void synaptics_process_packet(struct psmouse *psmouse)
1226 {
1227 struct input_dev *dev = psmouse->dev;
1228 struct synaptics_data *priv = psmouse->private;
1229 struct synaptics_hw_state hw;
1230 int num_fingers;
1231 int finger_width;
1232
1233 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1234 return;
1235
1236 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1237 synaptics_image_sensor_process(psmouse, &hw);
1238 return;
1239 }
1240
1241 if (hw.scroll) {
1242 priv->scroll += hw.scroll;
1243
1244 while (priv->scroll >= 4) {
1245 input_report_key(dev, BTN_BACK, !hw.down);
1246 input_sync(dev);
1247 input_report_key(dev, BTN_BACK, hw.down);
1248 input_sync(dev);
1249 priv->scroll -= 4;
1250 }
1251 while (priv->scroll <= -4) {
1252 input_report_key(dev, BTN_FORWARD, !hw.up);
1253 input_sync(dev);
1254 input_report_key(dev, BTN_FORWARD, hw.up);
1255 input_sync(dev);
1256 priv->scroll += 4;
1257 }
1258 return;
1259 }
1260
1261 if (hw.z > 0 && hw.x > 1) {
1262 num_fingers = 1;
1263 finger_width = 5;
1264 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1265 switch (hw.w) {
1266 case 0 ... 1:
1267 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1268 num_fingers = hw.w + 2;
1269 break;
1270 case 2:
1271 if (SYN_MODEL_PEN(priv->model_id))
1272 ; /* Nothing, treat a pen as a single finger */
1273 break;
1274 case 4 ... 15:
1275 if (SYN_CAP_PALMDETECT(priv->capabilities))
1276 finger_width = hw.w;
1277 break;
1278 }
1279 }
1280 } else {
1281 num_fingers = 0;
1282 finger_width = 0;
1283 }
1284
1285 if (cr48_profile_sensor) {
1286 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
1287 return;
1288 }
1289
1290 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1291 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1292 num_fingers);
1293
1294 /* Post events
1295 * BTN_TOUCH has to be first as mousedev relies on it when doing
1296 * absolute -> relative conversion
1297 */
1298 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1299 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1300
1301 if (num_fingers > 0) {
1302 input_report_abs(dev, ABS_X, hw.x);
1303 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1304 }
1305 input_report_abs(dev, ABS_PRESSURE, hw.z);
1306
1307 if (SYN_CAP_PALMDETECT(priv->capabilities))
1308 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1309
1310 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1311 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1312 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1313 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1314 }
1315
1316 synaptics_report_buttons(psmouse, &hw);
1317
1318 input_sync(dev);
1319 }
1320
1321 static int synaptics_validate_byte(struct psmouse *psmouse,
1322 int idx, unsigned char pkt_type)
1323 {
1324 static const unsigned char newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1325 static const unsigned char newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1326 static const unsigned char newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1327 static const unsigned char oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1328 static const unsigned char oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1329 const char *packet = psmouse->packet;
1330
1331 if (idx < 0 || idx > 4)
1332 return 0;
1333
1334 switch (pkt_type) {
1335
1336 case SYN_NEWABS:
1337 case SYN_NEWABS_RELAXED:
1338 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1339
1340 case SYN_NEWABS_STRICT:
1341 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1342
1343 case SYN_OLDABS:
1344 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1345
1346 default:
1347 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1348 return 0;
1349 }
1350 }
1351
1352 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1353 {
1354 int i;
1355
1356 for (i = 0; i < 5; i++)
1357 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1358 psmouse_info(psmouse, "using relaxed packet validation\n");
1359 return SYN_NEWABS_RELAXED;
1360 }
1361
1362 return SYN_NEWABS_STRICT;
1363 }
1364
1365 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1366 {
1367 struct synaptics_data *priv = psmouse->private;
1368
1369 if (psmouse->pktcnt >= 6) { /* Full packet received */
1370 if (unlikely(priv->pkt_type == SYN_NEWABS))
1371 priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1372
1373 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1374 synaptics_is_pt_packet(psmouse->packet)) {
1375 if (priv->pt_port)
1376 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1377 } else
1378 synaptics_process_packet(psmouse);
1379
1380 return PSMOUSE_FULL_PACKET;
1381 }
1382
1383 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1384 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1385 }
1386
1387 /*****************************************************************************
1388 * Driver initialization/cleanup functions
1389 ****************************************************************************/
1390 static void set_abs_position_params(struct input_dev *dev,
1391 struct synaptics_data *priv, int x_code,
1392 int y_code)
1393 {
1394 int x_min = priv->x_min ?: XMIN_NOMINAL;
1395 int x_max = priv->x_max ?: XMAX_NOMINAL;
1396 int y_min = priv->y_min ?: YMIN_NOMINAL;
1397 int y_max = priv->y_max ?: YMAX_NOMINAL;
1398 int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1399 SYN_REDUCED_FILTER_FUZZ : 0;
1400
1401 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1402 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1403 input_abs_set_res(dev, x_code, priv->x_res);
1404 input_abs_set_res(dev, y_code, priv->y_res);
1405 }
1406
1407 static void set_input_params(struct psmouse *psmouse,
1408 struct synaptics_data *priv)
1409 {
1410 struct input_dev *dev = psmouse->dev;
1411 int i;
1412
1413 /* Things that apply to both modes */
1414 __set_bit(INPUT_PROP_POINTER, dev->propbit);
1415 __set_bit(EV_KEY, dev->evbit);
1416 __set_bit(BTN_LEFT, dev->keybit);
1417 __set_bit(BTN_RIGHT, dev->keybit);
1418
1419 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1420 __set_bit(BTN_MIDDLE, dev->keybit);
1421
1422 if (!priv->absolute_mode) {
1423 /* Relative mode */
1424 __set_bit(EV_REL, dev->evbit);
1425 __set_bit(REL_X, dev->relbit);
1426 __set_bit(REL_Y, dev->relbit);
1427 return;
1428 }
1429
1430 /* Absolute mode */
1431 __set_bit(EV_ABS, dev->evbit);
1432 set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1433 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1434
1435 if (cr48_profile_sensor)
1436 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1437
1438 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1439 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1440 ABS_MT_POSITION_Y);
1441 /* Image sensors can report per-contact pressure */
1442 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1443 input_mt_init_slots(dev, 2, INPUT_MT_POINTER);
1444
1445 /* Image sensors can signal 4 and 5 finger clicks */
1446 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1447 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1448 } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1449 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1450 ABS_MT_POSITION_Y);
1451 /*
1452 * Profile sensor in CR-48 tracks contacts reasonably well,
1453 * other non-image sensors with AGM use semi-mt.
1454 */
1455 input_mt_init_slots(dev, 2,
1456 INPUT_MT_POINTER |
1457 (cr48_profile_sensor ?
1458 INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1459 }
1460
1461 if (SYN_CAP_PALMDETECT(priv->capabilities))
1462 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1463
1464 __set_bit(BTN_TOUCH, dev->keybit);
1465 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1466
1467 if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1468 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1469 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1470 }
1471
1472 if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1473 SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1474 __set_bit(BTN_FORWARD, dev->keybit);
1475 __set_bit(BTN_BACK, dev->keybit);
1476 }
1477
1478 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1479 __set_bit(BTN_0 + i, dev->keybit);
1480
1481 __clear_bit(EV_REL, dev->evbit);
1482 __clear_bit(REL_X, dev->relbit);
1483 __clear_bit(REL_Y, dev->relbit);
1484
1485 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1486 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1487 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1488 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1489 /* Clickpads report only left button */
1490 __clear_bit(BTN_RIGHT, dev->keybit);
1491 __clear_bit(BTN_MIDDLE, dev->keybit);
1492 }
1493 }
1494
1495 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1496 void *data, char *buf)
1497 {
1498 struct synaptics_data *priv = psmouse->private;
1499
1500 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1501 }
1502
1503 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1504 void *data, const char *buf,
1505 size_t len)
1506 {
1507 struct synaptics_data *priv = psmouse->private;
1508 unsigned int value;
1509 int err;
1510
1511 err = kstrtouint(buf, 10, &value);
1512 if (err)
1513 return err;
1514
1515 if (value > 1)
1516 return -EINVAL;
1517
1518 if (value == priv->disable_gesture)
1519 return len;
1520
1521 priv->disable_gesture = value;
1522 if (value)
1523 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1524 else
1525 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1526
1527 if (synaptics_mode_cmd(psmouse, priv->mode))
1528 return -EIO;
1529
1530 return len;
1531 }
1532
1533 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1534 synaptics_show_disable_gesture,
1535 synaptics_set_disable_gesture);
1536
1537 static void synaptics_disconnect(struct psmouse *psmouse)
1538 {
1539 struct synaptics_data *priv = psmouse->private;
1540
1541 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1542 device_remove_file(&psmouse->ps2dev.serio->dev,
1543 &psmouse_attr_disable_gesture.dattr);
1544
1545 synaptics_reset(psmouse);
1546 kfree(priv);
1547 psmouse->private = NULL;
1548 }
1549
1550 static int synaptics_reconnect(struct psmouse *psmouse)
1551 {
1552 struct synaptics_data *priv = psmouse->private;
1553 struct synaptics_data old_priv = *priv;
1554 unsigned char param[2];
1555 int retry = 0;
1556 int error;
1557
1558 do {
1559 psmouse_reset(psmouse);
1560 if (retry) {
1561 /*
1562 * On some boxes, right after resuming, the touchpad
1563 * needs some time to finish initializing (I assume
1564 * it needs time to calibrate) and start responding
1565 * to Synaptics-specific queries, so let's wait a
1566 * bit.
1567 */
1568 ssleep(1);
1569 }
1570 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1571 error = synaptics_detect(psmouse, 0);
1572 } while (error && ++retry < 3);
1573
1574 if (error)
1575 return -1;
1576
1577 if (retry > 1)
1578 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1579
1580 if (synaptics_query_hardware(psmouse)) {
1581 psmouse_err(psmouse, "Unable to query device.\n");
1582 return -1;
1583 }
1584
1585 if (synaptics_set_mode(psmouse)) {
1586 psmouse_err(psmouse, "Unable to initialize device.\n");
1587 return -1;
1588 }
1589
1590 if (old_priv.identity != priv->identity ||
1591 old_priv.model_id != priv->model_id ||
1592 old_priv.capabilities != priv->capabilities ||
1593 old_priv.ext_cap != priv->ext_cap) {
1594 psmouse_err(psmouse,
1595 "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1596 old_priv.identity, priv->identity,
1597 old_priv.model_id, priv->model_id,
1598 old_priv.capabilities, priv->capabilities,
1599 old_priv.ext_cap, priv->ext_cap);
1600 return -1;
1601 }
1602
1603 return 0;
1604 }
1605
1606 static bool impaired_toshiba_kbc;
1607
1608 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1609 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1610 {
1611 /* Toshiba Satellite */
1612 .matches = {
1613 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1614 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1615 },
1616 },
1617 {
1618 /* Toshiba Dynabook */
1619 .matches = {
1620 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1621 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1622 },
1623 },
1624 {
1625 /* Toshiba Portege M300 */
1626 .matches = {
1627 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1628 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1629 },
1630
1631 },
1632 {
1633 /* Toshiba Portege M300 */
1634 .matches = {
1635 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1636 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1637 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1638 },
1639
1640 },
1641 #endif
1642 { }
1643 };
1644
1645 static bool broken_olpc_ec;
1646
1647 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1648 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1649 {
1650 /* OLPC XO-1 or XO-1.5 */
1651 .matches = {
1652 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1653 DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1654 },
1655 },
1656 #endif
1657 { }
1658 };
1659
1660 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1661 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1662 {
1663 /* Cr-48 Chromebook (Codename Mario) */
1664 .matches = {
1665 DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1666 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1667 },
1668 },
1669 #endif
1670 { }
1671 };
1672
1673 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1674 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1675 {
1676 .matches = {
1677 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1678 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1679 },
1680 },
1681 #endif
1682 { }
1683 };
1684
1685 void __init synaptics_module_init(void)
1686 {
1687 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1688 broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1689 cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1690
1691 /*
1692 * Unfortunately ForcePad capability is not exported over PS/2,
1693 * so we have to resort to checking DMI.
1694 */
1695 is_forcepad = dmi_check_system(forcepad_dmi_table);
1696 }
1697
1698 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1699 {
1700 struct synaptics_data *priv;
1701 int err = -1;
1702
1703 /*
1704 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1705 * packet spew overloads the EC such that key presses on the keyboard
1706 * are missed. Given that, don't even attempt to use Absolute mode.
1707 * Relative mode seems to work just fine.
1708 */
1709 if (absolute_mode && broken_olpc_ec) {
1710 psmouse_info(psmouse,
1711 "OLPC XO detected, not enabling Synaptics protocol.\n");
1712 return -ENODEV;
1713 }
1714
1715 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1716 if (!priv)
1717 return -ENOMEM;
1718
1719 psmouse_reset(psmouse);
1720
1721 if (synaptics_query_hardware(psmouse)) {
1722 psmouse_err(psmouse, "Unable to query device.\n");
1723 goto init_fail;
1724 }
1725
1726 priv->absolute_mode = absolute_mode;
1727 if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1728 priv->disable_gesture = true;
1729
1730 if (synaptics_set_mode(psmouse)) {
1731 psmouse_err(psmouse, "Unable to initialize device.\n");
1732 goto init_fail;
1733 }
1734
1735 priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1736
1737 psmouse_info(psmouse,
1738 "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1739 SYN_ID_MODEL(priv->identity),
1740 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1741 priv->model_id,
1742 priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1743 priv->board_id, priv->firmware_id);
1744
1745 set_input_params(psmouse, priv);
1746
1747 /*
1748 * Encode touchpad model so that it can be used to set
1749 * input device->id.version and be visible to userspace.
1750 * Because version is __u16 we have to drop something.
1751 * Hardware info bits seem to be good candidates as they
1752 * are documented to be for Synaptics corp. internal use.
1753 */
1754 psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1755 (priv->model_id & 0x000000ff);
1756
1757 if (absolute_mode) {
1758 psmouse->protocol_handler = synaptics_process_byte;
1759 psmouse->pktsize = 6;
1760 } else {
1761 /* Relative mode follows standard PS/2 mouse protocol */
1762 psmouse->protocol_handler = psmouse_process_byte;
1763 psmouse->pktsize = 3;
1764 }
1765
1766 psmouse->set_rate = synaptics_set_rate;
1767 psmouse->disconnect = synaptics_disconnect;
1768 psmouse->reconnect = synaptics_reconnect;
1769 psmouse->cleanup = synaptics_reset;
1770 /* Synaptics can usually stay in sync without extra help */
1771 psmouse->resync_time = 0;
1772
1773 if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1774 synaptics_pt_create(psmouse);
1775
1776 /*
1777 * Toshiba's KBC seems to have trouble handling data from
1778 * Synaptics at full rate. Switch to a lower rate (roughly
1779 * the same rate as a standard PS/2 mouse).
1780 */
1781 if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1782 psmouse_info(psmouse,
1783 "Toshiba %s detected, limiting rate to 40pps.\n",
1784 dmi_get_system_info(DMI_PRODUCT_NAME));
1785 psmouse->rate = 40;
1786 }
1787
1788 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1789 err = device_create_file(&psmouse->ps2dev.serio->dev,
1790 &psmouse_attr_disable_gesture.dattr);
1791 if (err) {
1792 psmouse_err(psmouse,
1793 "Failed to create disable_gesture attribute (%d)",
1794 err);
1795 goto init_fail;
1796 }
1797 }
1798
1799 return 0;
1800
1801 init_fail:
1802 kfree(priv);
1803 return err;
1804 }
1805
1806 int synaptics_init(struct psmouse *psmouse)
1807 {
1808 return __synaptics_init(psmouse, true);
1809 }
1810
1811 int synaptics_init_relative(struct psmouse *psmouse)
1812 {
1813 return __synaptics_init(psmouse, false);
1814 }
1815
1816 bool synaptics_supported(void)
1817 {
1818 return true;
1819 }
1820
1821 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1822
1823 void __init synaptics_module_init(void)
1824 {
1825 }
1826
1827 int synaptics_init(struct psmouse *psmouse)
1828 {
1829 return -ENOSYS;
1830 }
1831
1832 bool synaptics_supported(void)
1833 {
1834 return false;
1835 }
1836
1837 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
Linux kernel - Deliverables
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