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