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Merge tag 'v3.10.98' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / input / mouse / elantech.c
CommitLineData
2a0bd75e 1/*
3f8c0df4 2 * Elantech Touchpad driver (v6)
2a0bd75e 3 *
3f8c0df4 4 * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
2a0bd75e
AO		 5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
9 *
10 * Trademarks are the property of their respective owners.
11 */
12
13#include <linux/delay.h>
5e02a153 14#include <linux/dmi.h>
5a0e3ad6 15#include <linux/slab.h>
2a0bd75e
AO		 16#include <linux/module.h>
17#include <linux/input.h>
89eec4d7 18#include <linux/input/mt.h>
2a0bd75e
AO		 19#include <linux/serio.h>
20#include <linux/libps2.h>
21#include "psmouse.h"
22#include "elantech.h"
23
d4ae84a8
DT		 24#define elantech_debug(fmt, ...) \
25 do { \
26 if (etd->debug) \
b5d21704
DT		 27 psmouse_printk(KERN_DEBUG, psmouse, \
28 fmt, ##__VA_ARGS__); \
2a0bd75e
AO		 29 } while (0)
30
31/*
32 * Send a Synaptics style sliced query command
33 */
34static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
35 unsigned char *param)
36{
37 if (psmouse_sliced_command(psmouse, c) ||
38 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
b5d21704 39 psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
2a0bd75e
AO		 40 return -1;
41 }
42
43 return 0;
44}
45
b56b92a9
JD		 46/*
47 * V3 and later support this fast command
48 */
49static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c,
50 unsigned char *param)
51{
52 struct ps2dev *ps2dev = &psmouse->ps2dev;
53
54 if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
55 ps2_command(ps2dev, NULL, c) ||
56 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
57 psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
58 return -1;
59 }
60
61 return 0;
62}
63
2a0bd75e
AO		 64/*
65 * A retrying version of ps2_command
66 */
67static int elantech_ps2_command(struct psmouse *psmouse,
68 unsigned char *param, int command)
69{
70 struct ps2dev *ps2dev = &psmouse->ps2dev;
71 struct elantech_data *etd = psmouse->private;
72 int rc;
73 int tries = ETP_PS2_COMMAND_TRIES;
74
75 do {
76 rc = ps2_command(ps2dev, param, command);
77 if (rc == 0)
78 break;
79 tries--;
d4ae84a8
DT		 80 elantech_debug("retrying ps2 command 0x%02x (%d).\n",
81 command, tries);
2a0bd75e
AO		 82 msleep(ETP_PS2_COMMAND_DELAY);
83 } while (tries > 0);
84
85 if (rc)
b5d21704 86 psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command);
2a0bd75e
AO		 87
88 return rc;
89}
90
91/*
92 * Send an Elantech style special command to read a value from a register
93 */
94static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
95 unsigned char *val)
96{
97 struct elantech_data *etd = psmouse->private;
98 unsigned char param[3];
99 int rc = 0;
100
1dc6edec 101 if (reg < 0x07 || reg > 0x26)
2a0bd75e
AO		 102 return -1;
103
104 if (reg > 0x11 && reg < 0x20)
105 return -1;
106
107 switch (etd->hw_version) {
108 case 1:
109 if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) ||
110 psmouse_sliced_command(psmouse, reg) ||
111 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
112 rc = -1;
113 }
114 break;
115
116 case 2:
117 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
118 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) ||
119 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
120 elantech_ps2_command(psmouse, NULL, reg) ||
121 elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
122 rc = -1;
123 }
124 break;
28f49616 125
1dc6edec 126 case 3 ... 4:
28f49616
JD		 127 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
128 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
129 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
130 elantech_ps2_command(psmouse, NULL, reg) ||
131 elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
132 rc = -1;
133 }
134 break;
2a0bd75e
AO		 135 }
136
137 if (rc)
b5d21704 138 psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg);
1dc6edec 139 else if (etd->hw_version != 4)
2a0bd75e 140 *val = param[0];
1dc6edec
JD		 141 else
142 *val = param[1];
2a0bd75e
AO		 143
144 return rc;
145}
146
147/*
148 * Send an Elantech style special command to write a register with a value
149 */
150static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
151 unsigned char val)
152{
153 struct elantech_data *etd = psmouse->private;
154 int rc = 0;
155
1dc6edec 156 if (reg < 0x07 || reg > 0x26)
2a0bd75e
AO		 157 return -1;
158
159 if (reg > 0x11 && reg < 0x20)
160 return -1;
161
162 switch (etd->hw_version) {
163 case 1:
164 if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) ||
165 psmouse_sliced_command(psmouse, reg) ||
166 psmouse_sliced_command(psmouse, val) ||
167 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
168 rc = -1;
169 }
170 break;
171
172 case 2:
173 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
174 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) ||
175 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
176 elantech_ps2_command(psmouse, NULL, reg) ||
177 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
178 elantech_ps2_command(psmouse, NULL, val) ||
179 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
180 rc = -1;
181 }
182 break;
28f49616
JD		 183
184 case 3:
185 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
186 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
187 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
188 elantech_ps2_command(psmouse, NULL, reg) ||
189 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
190 elantech_ps2_command(psmouse, NULL, val) ||
191 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
192 rc = -1;
193 }
194 break;
1dc6edec
JD		 195
196 case 4:
197 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
198 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
199 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
200 elantech_ps2_command(psmouse, NULL, reg) ||
201 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
202 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
203 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
204 elantech_ps2_command(psmouse, NULL, val) ||
205 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
206 rc = -1;
207 }
208 break;
2a0bd75e
AO		 209 }
210
211 if (rc)
b5d21704
DT		 212 psmouse_err(psmouse,
213 "failed to write register 0x%02x with value 0x%02x.\n",
214 reg, val);
2a0bd75e
AO		 215
216 return rc;
217}
218
219/*
220 * Dump a complete mouse movement packet to the syslog
221 */
b5d21704 222static void elantech_packet_dump(struct psmouse *psmouse)
2a0bd75e
AO		 223{
224 int i;
225
b5d21704
DT		 226 psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [");
227 for (i = 0; i < psmouse->pktsize; i++)
228 printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]);
2a0bd75e
AO		 229 printk("]\n");
230}
231
232/*
233 * Interpret complete data packets and report absolute mode input events for
234 * hardware version 1. (4 byte packets)
235 */
236static void elantech_report_absolute_v1(struct psmouse *psmouse)
237{
238 struct input_dev *dev = psmouse->dev;
239 struct elantech_data *etd = psmouse->private;
240 unsigned char *packet = psmouse->packet;
241 int fingers;
242
504e8bee 243 if (etd->fw_version < 0x020000) {
e938fbfd
FR		 244 /*
245 * byte 0: D U p1 p2 1 p3 R L
246 * byte 1: f 0 th tw x9 x8 y9 y8
247 */
2a0bd75e
AO		 248 fingers = ((packet[1] & 0x80) >> 7) +
249 ((packet[1] & 0x30) >> 4);
250 } else {
e938fbfd
FR		 251 /*
252 * byte 0: n1 n0 p2 p1 1 p3 R L
253 * byte 1: 0 0 0 0 x9 x8 y9 y8
254 */
2a0bd75e
AO		 255 fingers = (packet[0] & 0xc0) >> 6;
256 }
257
3f8c0df4 258 if (etd->jumpy_cursor) {
7f29f17b
ÉP		 259 if (fingers != 1) {
260 etd->single_finger_reports = 0;
261 } else if (etd->single_finger_reports < 2) {
262 /* Discard first 2 reports of one finger, bogus */
263 etd->single_finger_reports++;
d4ae84a8 264 elantech_debug("discarding packet\n");
7f29f17b 265 return;
3f8c0df4
AO		 266 }
267 }
268
2a0bd75e
AO		 269 input_report_key(dev, BTN_TOUCH, fingers != 0);
270
e938fbfd
FR		 271 /*
272 * byte 2: x7 x6 x5 x4 x3 x2 x1 x0
273 * byte 3: y7 y6 y5 y4 y3 y2 y1 y0
274 */
2a0bd75e
AO		 275 if (fingers) {
276 input_report_abs(dev, ABS_X,
277 ((packet[1] & 0x0c) << 6) | packet[2]);
e938fbfd 278 input_report_abs(dev, ABS_Y,
230282a7 279 etd->y_max - (((packet[1] & 0x03) << 8) | packet[3]));
2a0bd75e
AO		 280 }
281
282 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
283 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
284 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
285 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
286 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
287
504e8bee 288 if (etd->fw_version < 0x020000 &&
230282a7 289 (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
2a0bd75e
AO		 290 /* rocker up */
291 input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
292 /* rocker down */
293 input_report_key(dev, BTN_BACK, packet[0] & 0x80);
294 }
295
296 input_sync(dev);
297}
298
89eec4d7
ÉP		 299static void elantech_set_slot(struct input_dev *dev, int slot, bool active,
300 unsigned int x, unsigned int y)
301{
302 input_mt_slot(dev, slot);
303 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
304 if (active) {
305 input_report_abs(dev, ABS_MT_POSITION_X, x);
306 input_report_abs(dev, ABS_MT_POSITION_Y, y);
307 }
308}
309
310/* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */
311static void elantech_report_semi_mt_data(struct input_dev *dev,
312 unsigned int num_fingers,
313 unsigned int x1, unsigned int y1,
314 unsigned int x2, unsigned int y2)
315{
316 elantech_set_slot(dev, 0, num_fingers != 0, x1, y1);
1b577b9f 317 elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2);
89eec4d7
ÉP		 318}
319
2a0bd75e
AO		 320/*
321 * Interpret complete data packets and report absolute mode input events for
322 * hardware version 2. (6 byte packets)
323 */
324static void elantech_report_absolute_v2(struct psmouse *psmouse)
325{
f941c705 326 struct elantech_data *etd = psmouse->private;
2a0bd75e
AO		 327 struct input_dev *dev = psmouse->dev;
328 unsigned char *packet = psmouse->packet;
461a7917
JD		 329 unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
330 unsigned int width = 0, pres = 0;
2a0bd75e
AO		 331
332 /* byte 0: n1 n0 . . . . R L */
333 fingers = (packet[0] & 0xc0) >> 6;
2a0bd75e
AO		 334
335 switch (fingers) {
22462d9f
ÉP		 336 case 3:
337 /*
338 * Same as one finger, except report of more than 3 fingers:
339 * byte 3: n4 . w1 w0 . . . .
340 */
341 if (packet[3] & 0x80)
342 fingers = 4;
343 /* pass through... */
2a0bd75e 344 case 1:
e938fbfd 345 /*
11559619 346 * byte 1: . . . . x11 x10 x9 x8
e938fbfd
FR		 347 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
348 */
11559619 349 x1 = ((packet[1] & 0x0f) << 8) | packet[2];
e938fbfd 350 /*
11559619 351 * byte 4: . . . . y11 y10 y9 y8
e938fbfd
FR		 352 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
353 */
230282a7 354 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
89eec4d7 355
f941c705
ÉP		 356 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
357 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
2a0bd75e
AO		 358 break;
359
360 case 2:
e938fbfd
FR		 361 /*
362 * The coordinate of each finger is reported separately
363 * with a lower resolution for two finger touches:
364 * byte 0: . . ay8 ax8 . . . .
365 * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
366 */
461a7917 367 x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2;
2a0bd75e 368 /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
230282a7 369 y1 = etd->y_max -
461a7917 370 ((((packet[0] & 0x20) << 3) | packet[2]) << 2);
e938fbfd
FR		 371 /*
372 * byte 3: . . by8 bx8 . . . .
373 * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0
374 */
461a7917 375 x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2;
2a0bd75e 376 /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
230282a7 377 y2 = etd->y_max -
461a7917 378 ((((packet[3] & 0x20) << 3) | packet[5]) << 2);
f941c705
ÉP		 379
380 /* Unknown so just report sensible values */
381 pres = 127;
382 width = 7;
2a0bd75e
AO		 383 break;
384 }
385
461a7917
JD		 386 input_report_key(dev, BTN_TOUCH, fingers != 0);
387 if (fingers != 0) {
388 input_report_abs(dev, ABS_X, x1);
389 input_report_abs(dev, ABS_Y, y1);
390 }
89eec4d7 391 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
2a0bd75e
AO		 392 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
393 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
394 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
22462d9f 395 input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4);
2a0bd75e
AO		 396 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
397 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
f941c705
ÉP		 398 if (etd->reports_pressure) {
399 input_report_abs(dev, ABS_PRESSURE, pres);
400 input_report_abs(dev, ABS_TOOL_WIDTH, width);
401 }
2a0bd75e
AO		 402
403 input_sync(dev);
404}
405
28f49616
JD		 406/*
407 * Interpret complete data packets and report absolute mode input events for
408 * hardware version 3. (12 byte packets for two fingers)
409 */
410static void elantech_report_absolute_v3(struct psmouse *psmouse,
411 int packet_type)
412{
413 struct input_dev *dev = psmouse->dev;
414 struct elantech_data *etd = psmouse->private;
415 unsigned char *packet = psmouse->packet;
416 unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
417 unsigned int width = 0, pres = 0;
418
419 /* byte 0: n1 n0 . . . . R L */
420 fingers = (packet[0] & 0xc0) >> 6;
421
422 switch (fingers) {
423 case 3:
424 case 1:
425 /*
426 * byte 1: . . . . x11 x10 x9 x8
427 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
428 */
429 x1 = ((packet[1] & 0x0f) << 8) | packet[2];
430 /*
431 * byte 4: . . . . y11 y10 y9 y8
432 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
433 */
434 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
435 break;
436
437 case 2:
438 if (packet_type == PACKET_V3_HEAD) {
439 /*
440 * byte 1: . . . . ax11 ax10 ax9 ax8
441 * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
442 */
1dc6edec 443 etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2];
28f49616
JD		 444 /*
445 * byte 4: . . . . ay11 ay10 ay9 ay8
446 * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0
447 */
1dc6edec 448 etd->mt[0].y = etd->y_max -
28f49616
JD		 449 (((packet[4] & 0x0f) << 8) | packet[5]);
450 /*
451 * wait for next packet
452 */
453 return;
454 }
455
456 /* packet_type == PACKET_V3_TAIL */
1dc6edec
JD		 457 x1 = etd->mt[0].x;
458 y1 = etd->mt[0].y;
28f49616
JD		 459 x2 = ((packet[1] & 0x0f) << 8) | packet[2];
460 y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
461 break;
462 }
463
464 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
465 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
466
467 input_report_key(dev, BTN_TOUCH, fingers != 0);
468 if (fingers != 0) {
469 input_report_abs(dev, ABS_X, x1);
470 input_report_abs(dev, ABS_Y, y1);
471 }
472 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
473 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
474 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
475 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
7f646071
HG		 476
477 /* For clickpads map both buttons to BTN_LEFT */
478 if (etd->fw_version & 0x001000) {
479 input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
480 } else {
481 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
482 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
483 }
484
28f49616
JD		 485 input_report_abs(dev, ABS_PRESSURE, pres);
486 input_report_abs(dev, ABS_TOOL_WIDTH, width);
487
488 input_sync(dev);
489}
490
1dc6edec
JD		 491static void elantech_input_sync_v4(struct psmouse *psmouse)
492{
493 struct input_dev *dev = psmouse->dev;
7f646071 494 struct elantech_data *etd = psmouse->private;
1dc6edec
JD		 495 unsigned char *packet = psmouse->packet;
496
7f646071
HG		 497 /* For clickpads map both buttons to BTN_LEFT */
498 if (etd->fw_version & 0x001000) {
499 input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
500 } else {
501 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
502 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
503 }
504
1dc6edec
JD		 505 input_mt_report_pointer_emulation(dev, true);
506 input_sync(dev);
507}
508
509static void process_packet_status_v4(struct psmouse *psmouse)
510{
511 struct input_dev *dev = psmouse->dev;
512 unsigned char *packet = psmouse->packet;
513 unsigned fingers;
514 int i;
515
516 /* notify finger state change */
517 fingers = packet[1] & 0x1f;
518 for (i = 0; i < ETP_MAX_FINGERS; i++) {
519 if ((fingers & (1 << i)) == 0) {
520 input_mt_slot(dev, i);
521 input_mt_report_slot_state(dev, MT_TOOL_FINGER, false);
522 }
523 }
524
525 elantech_input_sync_v4(psmouse);
526}
527
528static void process_packet_head_v4(struct psmouse *psmouse)
529{
530 struct input_dev *dev = psmouse->dev;
531 struct elantech_data *etd = psmouse->private;
532 unsigned char *packet = psmouse->packet;
533 int id = ((packet[3] & 0xe0) >> 5) - 1;
534 int pres, traces;
535
536 if (id < 0)
537 return;
538
539 etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2];
540 etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
541 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
542 traces = (packet[0] & 0xf0) >> 4;
543
544 input_mt_slot(dev, id);
545 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
546
547 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
548 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
549 input_report_abs(dev, ABS_MT_PRESSURE, pres);
550 input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width);
551 /* report this for backwards compatibility */
552 input_report_abs(dev, ABS_TOOL_WIDTH, traces);
553
554 elantech_input_sync_v4(psmouse);
555}
556
557static void process_packet_motion_v4(struct psmouse *psmouse)
558{
559 struct input_dev *dev = psmouse->dev;
560 struct elantech_data *etd = psmouse->private;
561 unsigned char *packet = psmouse->packet;
562 int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0;
563 int id, sid;
564
565 id = ((packet[0] & 0xe0) >> 5) - 1;
566 if (id < 0)
567 return;
568
569 sid = ((packet[3] & 0xe0) >> 5) - 1;
570 weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1;
571 /*
572 * Motion packets give us the delta of x, y values of specific fingers,
573 * but in two's complement. Let the compiler do the conversion for us.
574 * Also _enlarge_ the numbers to int, in case of overflow.
575 */
576 delta_x1 = (signed char)packet[1];
577 delta_y1 = (signed char)packet[2];
578 delta_x2 = (signed char)packet[4];
579 delta_y2 = (signed char)packet[5];
580
581 etd->mt[id].x += delta_x1 * weight;
582 etd->mt[id].y -= delta_y1 * weight;
583 input_mt_slot(dev, id);
584 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
585 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
586
587 if (sid >= 0) {
588 etd->mt[sid].x += delta_x2 * weight;
589 etd->mt[sid].y -= delta_y2 * weight;
590 input_mt_slot(dev, sid);
591 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x);
592 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y);
593 }
594
595 elantech_input_sync_v4(psmouse);
596}
597
598static void elantech_report_absolute_v4(struct psmouse *psmouse,
599 int packet_type)
600{
601 switch (packet_type) {
602 case PACKET_V4_STATUS:
603 process_packet_status_v4(psmouse);
604 break;
605
606 case PACKET_V4_HEAD:
607 process_packet_head_v4(psmouse);
608 break;
609
610 case PACKET_V4_MOTION:
611 process_packet_motion_v4(psmouse);
612 break;
613
614 case PACKET_UNKNOWN:
615 default:
616 /* impossible to get here */
617 break;
618 }
619}
620
7894f21b 621static int elantech_packet_check_v1(struct psmouse *psmouse)
2a0bd75e
AO		 622{
623 struct elantech_data *etd = psmouse->private;
624 unsigned char *packet = psmouse->packet;
625 unsigned char p1, p2, p3;
626
627 /* Parity bits are placed differently */
504e8bee 628 if (etd->fw_version < 0x020000) {
2a0bd75e
AO		 629 /* byte 0: D U p1 p2 1 p3 R L */
630 p1 = (packet[0] & 0x20) >> 5;
631 p2 = (packet[0] & 0x10) >> 4;
632 } else {
633 /* byte 0: n1 n0 p2 p1 1 p3 R L */
634 p1 = (packet[0] & 0x10) >> 4;
635 p2 = (packet[0] & 0x20) >> 5;
636 }
637
638 p3 = (packet[0] & 0x04) >> 2;
639
640 return etd->parity[packet[1]] == p1 &&
641 etd->parity[packet[2]] == p2 &&
642 etd->parity[packet[3]] == p3;
643}
644
84a90b61
JD		 645static int elantech_debounce_check_v2(struct psmouse *psmouse)
646{
647 /*
648 * When we encounter packet that matches this exactly, it means the
649 * hardware is in debounce status. Just ignore the whole packet.
650 */
651 const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff };
652 unsigned char *packet = psmouse->packet;
653
654 return !memcmp(packet, debounce_packet, sizeof(debounce_packet));
655}
656
7894f21b
JD		 657static int elantech_packet_check_v2(struct psmouse *psmouse)
658{
659 struct elantech_data *etd = psmouse->private;
660 unsigned char *packet = psmouse->packet;
661
662 /*
663 * V2 hardware has two flavors. Older ones that do not report pressure,
664 * and newer ones that reports pressure and width. With newer ones, all
665 * packets (1, 2, 3 finger touch) have the same constant bits. With
666 * older ones, 1/3 finger touch packets and 2 finger touch packets
667 * have different constant bits.
668 * With all three cases, if the constant bits are not exactly what I
669 * expected, I consider them invalid.
670 */
671 if (etd->reports_pressure)
672 return (packet[0] & 0x0c) == 0x04 &&
673 (packet[3] & 0x0f) == 0x02;
674
675 if ((packet[0] & 0xc0) == 0x80)
676 return (packet[0] & 0x0c) == 0x0c &&
677 (packet[3] & 0x0e) == 0x08;
678
679 return (packet[0] & 0x3c) == 0x3c &&
680 (packet[1] & 0xf0) == 0x00 &&
681 (packet[3] & 0x3e) == 0x38 &&
682 (packet[4] & 0xf0) == 0x00;
683}
684
28f49616
JD		 685/*
686 * We check the constant bits to determine what packet type we get,
1dc6edec 687 * so packet checking is mandatory for v3 and later hardware.
28f49616
JD		 688 */
689static int elantech_packet_check_v3(struct psmouse *psmouse)
690{
691 const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff };
692 unsigned char *packet = psmouse->packet;
693
694 /*
695 * check debounce first, it has the same signature in byte 0
696 * and byte 3 as PACKET_V3_HEAD.
697 */
698 if (!memcmp(packet, debounce_packet, sizeof(debounce_packet)))
699 return PACKET_DEBOUNCE;
700
701 if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02)
702 return PACKET_V3_HEAD;
703
704 if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c)
705 return PACKET_V3_TAIL;
706
707 return PACKET_UNKNOWN;
708}
709
1dc6edec
JD		 710static int elantech_packet_check_v4(struct psmouse *psmouse)
711{
712 unsigned char *packet = psmouse->packet;
713
714 if ((packet[0] & 0x0c) == 0x04 &&
715 (packet[3] & 0x1f) == 0x11)
716 return PACKET_V4_HEAD;
717
718 if ((packet[0] & 0x0c) == 0x04 &&
719 (packet[3] & 0x1f) == 0x12)
720 return PACKET_V4_MOTION;
721
722 if ((packet[0] & 0x0c) == 0x04 &&
723 (packet[3] & 0x1f) == 0x10)
724 return PACKET_V4_STATUS;
725
726 return PACKET_UNKNOWN;
727}
728
2a0bd75e
AO		 729/*
730 * Process byte stream from mouse and handle complete packets
731 */
732static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
733{
734 struct elantech_data *etd = psmouse->private;
28f49616 735 int packet_type;
2a0bd75e
AO		 736
737 if (psmouse->pktcnt < psmouse->pktsize)
738 return PSMOUSE_GOOD_DATA;
739
740 if (etd->debug > 1)
b5d21704 741 elantech_packet_dump(psmouse);
2a0bd75e
AO		 742
743 switch (etd->hw_version) {
744 case 1:
7894f21b 745 if (etd->paritycheck && !elantech_packet_check_v1(psmouse))
2a0bd75e
AO		 746 return PSMOUSE_BAD_DATA;
747
748 elantech_report_absolute_v1(psmouse);
749 break;
750
751 case 2:
84a90b61
JD		 752 /* ignore debounce */
753 if (elantech_debounce_check_v2(psmouse))
754 return PSMOUSE_FULL_PACKET;
755
7894f21b
JD		 756 if (etd->paritycheck && !elantech_packet_check_v2(psmouse))
757 return PSMOUSE_BAD_DATA;
758
2a0bd75e
AO		 759 elantech_report_absolute_v2(psmouse);
760 break;
28f49616
JD		 761
762 case 3:
763 packet_type = elantech_packet_check_v3(psmouse);
764 /* ignore debounce */
765 if (packet_type == PACKET_DEBOUNCE)
766 return PSMOUSE_FULL_PACKET;
767
768 if (packet_type == PACKET_UNKNOWN)
769 return PSMOUSE_BAD_DATA;
770
771 elantech_report_absolute_v3(psmouse, packet_type);
772 break;
1dc6edec
JD		 773
774 case 4:
775 packet_type = elantech_packet_check_v4(psmouse);
776 if (packet_type == PACKET_UNKNOWN)
777 return PSMOUSE_BAD_DATA;
778
779 elantech_report_absolute_v4(psmouse, packet_type);
780 break;
2a0bd75e
AO		 781 }
782
783 return PSMOUSE_FULL_PACKET;
784}
785
b9c40627
UDB		 786/*
787 * This writes the reg_07 value again to the hardware at the end of every
788 * set_rate call because the register loses its value. reg_07 allows setting
789 * absolute mode on v4 hardware
790 */
791static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse,
792 unsigned int rate)
793{
794 struct elantech_data *etd = psmouse->private;
795
796 etd->original_set_rate(psmouse, rate);
797 if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
798 psmouse_err(psmouse, "restoring reg_07 failed\n");
799}
800
2a0bd75e
AO		 801/*
802 * Put the touchpad into absolute mode
803 */
804static int elantech_set_absolute_mode(struct psmouse *psmouse)
805{
806 struct elantech_data *etd = psmouse->private;
807 unsigned char val;
808 int tries = ETP_READ_BACK_TRIES;
809 int rc = 0;
810
811 switch (etd->hw_version) {
812 case 1:
813 etd->reg_10 = 0x16;
814 etd->reg_11 = 0x8f;
815 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
816 elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
817 rc = -1;
818 }
819 break;
820
821 case 2:
822 /* Windows driver values */
823 etd->reg_10 = 0x54;
824 etd->reg_11 = 0x88; /* 0x8a */
825 etd->reg_21 = 0x60; /* 0x00 */
826 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
827 elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
828 elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
829 rc = -1;
2a0bd75e 830 }
28f49616
JD		 831 break;
832
833 case 3:
5e02a153
HG		 834 if (etd->set_hw_resolution)
835 etd->reg_10 = 0x0b;
836 else
21baa4fe 837 etd->reg_10 = 0x01;
5e02a153 838
28f49616
JD		 839 if (elantech_write_reg(psmouse, 0x10, etd->reg_10))
840 rc = -1;
841
842 break;
1dc6edec
JD		 843
844 case 4:
845 etd->reg_07 = 0x01;
846 if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
847 rc = -1;
848
849 goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */
b2546df6
AO		 850 }
851
852 if (rc == 0) {
2a0bd75e 853 /*
b2546df6
AO		 854 * Read back reg 0x10. For hardware version 1 we must make
855 * sure the absolute mode bit is set. For hardware version 2
b5d21704 856 * the touchpad is probably initializing and not ready until
b2546df6 857 * we read back the value we just wrote.
2a0bd75e
AO		 858 */
859 do {
860 rc = elantech_read_reg(psmouse, 0x10, &val);
861 if (rc == 0)
862 break;
863 tries--;
d4ae84a8 864 elantech_debug("retrying read (%d).\n", tries);
2a0bd75e
AO		 865 msleep(ETP_READ_BACK_DELAY);
866 } while (tries > 0);
b2546df6
AO		 867
868 if (rc) {
b5d21704
DT		 869 psmouse_err(psmouse,
870 "failed to read back register 0x10.\n");
b2546df6
AO		 871 } else if (etd->hw_version == 1 &&
872 !(val & ETP_R10_ABSOLUTE_MODE)) {
b5d21704
DT		 873 psmouse_err(psmouse,
874 "touchpad refuses to switch to absolute mode.\n");
b2546df6
AO		 875 rc = -1;
876 }
2a0bd75e
AO		 877 }
878
1dc6edec 879 skip_readback_reg_10:
2a0bd75e 880 if (rc)
b5d21704 881 psmouse_err(psmouse, "failed to initialise registers.\n");
2a0bd75e
AO		 882
883 return rc;
884}
885
28f49616
JD		 886static int elantech_set_range(struct psmouse *psmouse,
887 unsigned int *x_min, unsigned int *y_min,
1dc6edec
JD		 888 unsigned int *x_max, unsigned int *y_max,
889 unsigned int *width)
230282a7
JD		 890{
891 struct elantech_data *etd = psmouse->private;
28f49616 892 unsigned char param[3];
1dc6edec 893 unsigned char traces;
230282a7
JD		 894
895 switch (etd->hw_version) {
896 case 1:
897 *x_min = ETP_XMIN_V1;
898 *y_min = ETP_YMIN_V1;
899 *x_max = ETP_XMAX_V1;
900 *y_max = ETP_YMAX_V1;
901 break;
902
903 case 2:
904 if (etd->fw_version == 0x020800 ||
905 etd->fw_version == 0x020b00 ||
906 etd->fw_version == 0x020030) {
907 *x_min = ETP_XMIN_V2;
908 *y_min = ETP_YMIN_V2;
909 *x_max = ETP_XMAX_V2;
910 *y_max = ETP_YMAX_V2;
911 } else {
84a90b61
JD		 912 int i;
913 int fixed_dpi;
914
230282a7
JD		 915 i = (etd->fw_version > 0x020800 &&
916 etd->fw_version < 0x020900) ? 1 : 2;
84a90b61 917
b56b92a9 918 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
84a90b61
JD		 919 return -1;
920
921 fixed_dpi = param[1] & 0x10;
922
923 if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
b56b92a9 924 if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
84a90b61
JD		 925 return -1;
926
927 *x_max = (etd->capabilities[1] - i) * param[1] / 2;
928 *y_max = (etd->capabilities[2] - i) * param[2] / 2;
929 } else if (etd->fw_version == 0x040216) {
930 *x_max = 819;
931 *y_max = 405;
932 } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) {
933 *x_max = 900;
934 *y_max = 500;
935 } else {
936 *x_max = (etd->capabilities[1] - i) * 64;
937 *y_max = (etd->capabilities[2] - i) * 64;
938 }
230282a7
JD		 939 }
940 break;
28f49616
JD		 941
942 case 3:
b56b92a9 943 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
28f49616
JD		 944 return -1;
945
946 *x_max = (0x0f & param[0]) << 8 | param[1];
947 *y_max = (0xf0 & param[0]) << 4 | param[2];
948 break;
1dc6edec
JD		 949
950 case 4:
b56b92a9 951 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
1dc6edec
JD		 952 return -1;
953
954 *x_max = (0x0f & param[0]) << 8 | param[1];
955 *y_max = (0xf0 & param[0]) << 4 | param[2];
956 traces = etd->capabilities[1];
957 if ((traces < 2) || (traces > *x_max))
958 return -1;
959
960 *width = *x_max / (traces - 1);
961 break;
230282a7 962 }
28f49616
JD		 963
964 return 0;
230282a7
JD		 965}
966
3d95fd6a
JD		 967/*
968 * (value from firmware) * 10 + 790 = dpi
969 * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
970 */
971static unsigned int elantech_convert_res(unsigned int val)
972{
973 return (val * 10 + 790) * 10 / 254;
974}
975
976static int elantech_get_resolution_v4(struct psmouse *psmouse,
977 unsigned int *x_res,
978 unsigned int *y_res)
979{
980 unsigned char param[3];
981
982 if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param))
983 return -1;
984
985 *x_res = elantech_convert_res(param[1] & 0x0f);
986 *y_res = elantech_convert_res((param[1] & 0xf0) >> 4);
987
988 return 0;
989}
990
dc48b3de
HG		 991/*
992 * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in
993 * fw_version for this is based on the following fw_version & caps table:
994 *
995 * Laptop-model: fw_version: caps: buttons:
996 * Acer S3 0x461f00 10, 13, 0e clickpad
997 * Acer S7-392 0x581f01 50, 17, 0d clickpad
998 * Acer V5-131 0x461f02 01, 16, 0c clickpad
999 * Acer V5-551 0x461f00 ? clickpad
1000 * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons
1001 * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons
1002 * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons
b9c40627
UDB		 1003 * Asus TP500LN 0x381f17 10, 14, 0e clickpad
1004 * Asus X750JN 0x381f17 10, 14, 0e clickpad
dc48b3de
HG		 1005 * Asus UX31 0x361f00 20, 15, 0e clickpad
1006 * Asus UX32VD 0x361f02 00, 15, 0e clickpad
1007 * Avatar AVIU-145A2 0x361f00 ? clickpad
1008 * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons
1009 * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*)
1010 * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons
1011 * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad
1012 * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad
1013 * Samsung NP900X3E-A02 0x575f03 ? clickpad
1014 * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad
1015 * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons
1016 * Samsung RF710 0x450f00 ? 2 hw buttons
1017 * System76 Pangolin 0x250f01 ? 2 hw buttons
1018 * (*) + 3 trackpoint buttons
1019 */
1020static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
1021{
1022 struct input_dev *dev = psmouse->dev;
1023 struct elantech_data *etd = psmouse->private;
1024
1025 if (etd->fw_version & 0x001000) {
1026 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1027 __clear_bit(BTN_RIGHT, dev->keybit);
1028 }
1029}
1030
2a0bd75e
AO		 1031/*
1032 * Set the appropriate event bits for the input subsystem
1033 */
28f49616 1034static int elantech_set_input_params(struct psmouse *psmouse)
2a0bd75e
AO		 1035{
1036 struct input_dev *dev = psmouse->dev;
1037 struct elantech_data *etd = psmouse->private;
1dc6edec 1038 unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
3d95fd6a 1039 unsigned int x_res = 0, y_res = 0;
230282a7 1040
1dc6edec 1041 if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
28f49616 1042 return -1;
2a0bd75e 1043
e3dde4fb 1044 __set_bit(INPUT_PROP_POINTER, dev->propbit);
2a0bd75e
AO		 1045 __set_bit(EV_KEY, dev->evbit);
1046 __set_bit(EV_ABS, dev->evbit);
c7a1f3cc 1047 __clear_bit(EV_REL, dev->evbit);
2a0bd75e
AO		 1048
1049 __set_bit(BTN_LEFT, dev->keybit);
1050 __set_bit(BTN_RIGHT, dev->keybit);
1051
1052 __set_bit(BTN_TOUCH, dev->keybit);
1053 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1054 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1055 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1056
1057 switch (etd->hw_version) {
1058 case 1:
1059 /* Rocker button */
504e8bee 1060 if (etd->fw_version < 0x020000 &&
230282a7 1061 (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
2a0bd75e
AO		 1062 __set_bit(BTN_FORWARD, dev->keybit);
1063 __set_bit(BTN_BACK, dev->keybit);
1064 }
230282a7
JD		 1065 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1066 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
2a0bd75e
AO		 1067 break;
1068
1069 case 2:
22462d9f 1070 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
28f49616
JD		 1071 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1072 /* fall through */
1073 case 3:
dc48b3de
HG		 1074 if (etd->hw_version == 3)
1075 elantech_set_buttonpad_prop(psmouse);
230282a7
JD		 1076 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1077 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
f941c705
ÉP		 1078 if (etd->reports_pressure) {
1079 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1080 ETP_PMAX_V2, 0, 0);
1081 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1082 ETP_WMAX_V2, 0, 0);
1083 }
209bde19 1084 input_mt_init_slots(dev, 2, INPUT_MT_SEMI_MT);
230282a7
JD		 1085 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1086 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
2a0bd75e 1087 break;
1dc6edec
JD		 1088
1089 case 4:
3d95fd6a
JD		 1090 if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) {
1091 /*
1092 * if query failed, print a warning and leave the values
1093 * zero to resemble synaptics.c behavior.
1094 */
1095 psmouse_warn(psmouse, "couldn't query resolution data.\n");
1096 }
dc48b3de 1097 elantech_set_buttonpad_prop(psmouse);
1dc6edec
JD		 1098 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1099 /* For X to recognize me as touchpad. */
1100 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1101 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
3d95fd6a
JD		 1102 input_abs_set_res(dev, ABS_X, x_res);
1103 input_abs_set_res(dev, ABS_Y, y_res);
1dc6edec
JD		 1104 /*
1105 * range of pressure and width is the same as v2,
1106 * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
1107 */
1108 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1109 ETP_PMAX_V2, 0, 0);
1110 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1111 ETP_WMAX_V2, 0, 0);
1112 /* Multitouch capable pad, up to 5 fingers. */
b4adbbef 1113 input_mt_init_slots(dev, ETP_MAX_FINGERS, 0);
1dc6edec
JD		 1114 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1115 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
3d95fd6a
JD		 1116 input_abs_set_res(dev, ABS_MT_POSITION_X, x_res);
1117 input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res);
1dc6edec
JD		 1118 input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2,
1119 ETP_PMAX_V2, 0, 0);
1120 /*
1121 * The firmware reports how many trace lines the finger spans,
1122 * convert to surface unit as Protocol-B requires.
1123 */
1124 input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0,
1125 ETP_WMAX_V2 * width, 0, 0);
1126 break;
2a0bd75e 1127 }
230282a7
JD		 1128
1129 etd->y_max = y_max;
1dc6edec 1130 etd->width = width;
28f49616
JD		 1131
1132 return 0;
2a0bd75e
AO		 1133}
1134
1135struct elantech_attr_data {
1136 size_t field_offset;
1137 unsigned char reg;
1138};
1139
1140/*
1141 * Display a register value by reading a sysfs entry
1142 */
1143static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
1144 char *buf)
1145{
1146 struct elantech_data *etd = psmouse->private;
1147 struct elantech_attr_data *attr = data;
1148 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
1149 int rc = 0;
1150
1151 if (attr->reg)
1152 rc = elantech_read_reg(psmouse, attr->reg, reg);
1153
1154 return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
1155}
1156
1157/*
1158 * Write a register value by writing a sysfs entry
1159 */
1160static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
1161 void *data, const char *buf, size_t count)
1162{
1163 struct elantech_data *etd = psmouse->private;
1164 struct elantech_attr_data *attr = data;
1165 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
76496e7a 1166 unsigned char value;
2a0bd75e
AO		 1167 int err;
1168
76496e7a 1169 err = kstrtou8(buf, 16, &value);
2a0bd75e
AO		 1170 if (err)
1171 return err;
1172
2a0bd75e
AO		 1173 /* Do we need to preserve some bits for version 2 hardware too? */
1174 if (etd->hw_version == 1) {
1175 if (attr->reg == 0x10)
1176 /* Force absolute mode always on */
1177 value |= ETP_R10_ABSOLUTE_MODE;
1178 else if (attr->reg == 0x11)
1179 /* Force 4 byte mode always on */
1180 value |= ETP_R11_4_BYTE_MODE;
1181 }
1182
1183 if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
1184 *reg = value;
1185
1186 return count;
1187}
1188
1189#define ELANTECH_INT_ATTR(_name, _register) \
1190 static struct elantech_attr_data elantech_attr_##_name = { \
1191 .field_offset = offsetof(struct elantech_data, _name), \
1192 .reg = _register, \
1193 }; \
1194 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
1195 &elantech_attr_##_name, \
1196 elantech_show_int_attr, \
1197 elantech_set_int_attr)
1198
1dc6edec 1199ELANTECH_INT_ATTR(reg_07, 0x07);
2a0bd75e
AO		 1200ELANTECH_INT_ATTR(reg_10, 0x10);
1201ELANTECH_INT_ATTR(reg_11, 0x11);
1202ELANTECH_INT_ATTR(reg_20, 0x20);
1203ELANTECH_INT_ATTR(reg_21, 0x21);
1204ELANTECH_INT_ATTR(reg_22, 0x22);
1205ELANTECH_INT_ATTR(reg_23, 0x23);
1206ELANTECH_INT_ATTR(reg_24, 0x24);
1207ELANTECH_INT_ATTR(reg_25, 0x25);
1208ELANTECH_INT_ATTR(reg_26, 0x26);
1209ELANTECH_INT_ATTR(debug, 0);
1210ELANTECH_INT_ATTR(paritycheck, 0);
1211
1212static struct attribute *elantech_attrs[] = {
1dc6edec 1213 &psmouse_attr_reg_07.dattr.attr,
2a0bd75e
AO		 1214 &psmouse_attr_reg_10.dattr.attr,
1215 &psmouse_attr_reg_11.dattr.attr,
1216 &psmouse_attr_reg_20.dattr.attr,
1217 &psmouse_attr_reg_21.dattr.attr,
1218 &psmouse_attr_reg_22.dattr.attr,
1219 &psmouse_attr_reg_23.dattr.attr,
1220 &psmouse_attr_reg_24.dattr.attr,
1221 &psmouse_attr_reg_25.dattr.attr,
1222 &psmouse_attr_reg_26.dattr.attr,
1223 &psmouse_attr_debug.dattr.attr,
1224 &psmouse_attr_paritycheck.dattr.attr,
1225 NULL
1226};
1227
1228static struct attribute_group elantech_attr_group = {
1229 .attrs = elantech_attrs,
1230};
1231
a083632e
DT		 1232static bool elantech_is_signature_valid(const unsigned char *param)
1233{
1234 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 };
1235 int i;
1236
1237 if (param[0] == 0)
1238 return false;
1239
1240 if (param[1] == 0)
1241 return true;
1242
9ec35482 1243 /*
61571905
HG		 1244 * Some hw_version >= 4 models have a revision higher then 20. Meaning
1245 * that param[2] may be 10 or 20, skip the rates check for these.
9ec35482 1246 */
61571905
HG		 1247 if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f &&
1248 param[2] < 40)
9ec35482
HG		 1249 return true;
1250
a083632e
DT		 1251 for (i = 0; i < ARRAY_SIZE(rates); i++)
1252 if (param[2] == rates[i])
1253 return false;
1254
1255 return true;
1256}
1257
2a0bd75e
AO		 1258/*
1259 * Use magic knock to detect Elantech touchpad
1260 */
b7802c5c 1261int elantech_detect(struct psmouse *psmouse, bool set_properties)
2a0bd75e
AO		 1262{
1263 struct ps2dev *ps2dev = &psmouse->ps2dev;
1264 unsigned char param[3];
1265
1266 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1267
1268 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1269 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1270 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1271 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1272 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
b5d21704 1273 psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n");
2a0bd75e
AO		 1274 return -1;
1275 }
1276
1277 /*
1278 * Report this in case there are Elantech models that use a different
1279 * set of magic numbers
1280 */
28f49616
JD		 1281 if (param[0] != 0x3c || param[1] != 0x03 ||
1282 (param[2] != 0xc8 && param[2] != 0x00)) {
b5d21704
DT		 1283 psmouse_dbg(psmouse,
1284 "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
1285 param[0], param[1], param[2]);
9ab7b25e
AO		 1286 return -1;
1287 }
1288
1289 /*
1290 * Query touchpad's firmware version and see if it reports known
1291 * value to avoid mis-detection. Logitech mice are known to respond
1292 * to Elantech magic knock and there might be more.
1293 */
1294 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1295 psmouse_dbg(psmouse, "failed to query firmware version.\n");
9ab7b25e
AO		 1296 return -1;
1297 }
1298
b5d21704
DT		 1299 psmouse_dbg(psmouse,
1300 "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
1301 param[0], param[1], param[2]);
9ab7b25e 1302
a083632e 1303 if (!elantech_is_signature_valid(param)) {
b5d21704
DT		 1304 psmouse_dbg(psmouse,
1305 "Probably not a real Elantech touchpad. Aborting.\n");
4af61e90 1306 return -1;
2a0bd75e
AO		 1307 }
1308
1309 if (set_properties) {
1310 psmouse->vendor = "Elantech";
1311 psmouse->name = "Touchpad";
1312 }
1313
1314 return 0;
1315}
1316
1317/*
1318 * Clean up sysfs entries when disconnecting
1319 */
1320static void elantech_disconnect(struct psmouse *psmouse)
1321{
1322 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1323 &elantech_attr_group);
1324 kfree(psmouse->private);
1325 psmouse->private = NULL;
1326}
1327
1328/*
1329 * Put the touchpad back into absolute mode when reconnecting
1330 */
1331static int elantech_reconnect(struct psmouse *psmouse)
1332{
a67ada7a
JD		 1333 psmouse_reset(psmouse);
1334
2a0bd75e
AO		 1335 if (elantech_detect(psmouse, 0))
1336 return -1;
1337
1338 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1339 psmouse_err(psmouse,
1340 "failed to put touchpad back into absolute mode.\n");
2a0bd75e
AO		 1341 return -1;
1342 }
1343
1344 return 0;
1345}
1346
5e02a153 1347/*
21baa4fe
HG		 1348 * Some hw_version 3 models go into error state when we try to set
1349 * bit 3 and/or bit 1 of r10.
5e02a153
HG		 1350 */
1351static const struct dmi_system_id no_hw_res_dmi_table[] = {
1352#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1353 {
1354 /* Gigabyte U2442 */
1355 .matches = {
1356 DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
1357 DMI_MATCH(DMI_PRODUCT_NAME, "U2442"),
1358 },
1359 },
220e1e03
TI		 1360 {
1361 /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */
1362 .matches = {
1363 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1364 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"),
1365 },
1366 },
5e02a153
HG		 1367#endif
1368 { }
1369};
1370
3c8bbb95
JD		 1371/*
1372 * determine hardware version and set some properties according to it.
1373 */
28f49616 1374static int elantech_set_properties(struct elantech_data *etd)
3c8bbb95 1375{
3940d618 1376 /* This represents the version of IC body. */
1dc6edec
JD		 1377 int ver = (etd->fw_version & 0x0f0000) >> 16;
1378
3940d618 1379 /* Early version of Elan touchpads doesn't obey the rule. */
3c8bbb95
JD		 1380 if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
1381 etd->hw_version = 1;
3940d618
JD		 1382 else {
1383 switch (ver) {
1384 case 2:
1385 case 4:
1386 etd->hw_version = 2;
1387 break;
1388 case 5:
1389 etd->hw_version = 3;
1390 break;
1391 case 6:
1392 etd->hw_version = 4;
1393 break;
1394 default:
1395 return -1;
1396 }
1397 }
3c8bbb95 1398
b56b92a9
JD		 1399 /* decide which send_cmd we're gonna use early */
1400 etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :
1401 synaptics_send_cmd;
1402
1403 /* Turn on packet checking by default */
3c8bbb95
JD		 1404 etd->paritycheck = 1;
1405
1406 /*
1407 * This firmware suffers from misreporting coordinates when
1408 * a touch action starts causing the mouse cursor or scrolled page
1409 * to jump. Enable a workaround.
1410 */
1411 etd->jumpy_cursor =
1412 (etd->fw_version == 0x020022 || etd->fw_version == 0x020600);
1413
28f49616 1414 if (etd->hw_version > 1) {
3c8bbb95
JD		 1415 /* For now show extra debug information */
1416 etd->debug = 1;
1417
1418 if (etd->fw_version >= 0x020800)
1419 etd->reports_pressure = true;
1420 }
28f49616 1421
5e02a153
HG		 1422 /* Enable real hardware resolution on hw_version 3 ? */
1423 etd->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);
1424
28f49616 1425 return 0;
3c8bbb95
JD		 1426}
1427
2a0bd75e
AO		 1428/*
1429 * Initialize the touchpad and create sysfs entries
1430 */
1431int elantech_init(struct psmouse *psmouse)
1432{
1433 struct elantech_data *etd;
1434 int i, error;
1435 unsigned char param[3];
1436
9ab7b25e 1437 psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
2a0bd75e 1438 if (!etd)
6792cbbb 1439 return -ENOMEM;
2a0bd75e 1440
a67ada7a
JD		 1441 psmouse_reset(psmouse);
1442
2a0bd75e
AO		 1443 etd->parity[0] = 1;
1444 for (i = 1; i < 256; i++)
1445 etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
1446
1447 /*
9ab7b25e 1448 * Do the version query again so we can store the result
2a0bd75e
AO		 1449 */
1450 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1451 psmouse_err(psmouse, "failed to query firmware version.\n");
2a0bd75e
AO		 1452 goto init_fail;
1453 }
504e8bee 1454 etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
28f49616
JD		 1455
1456 if (elantech_set_properties(etd)) {
b5d21704 1457 psmouse_err(psmouse, "unknown hardware version, aborting...\n");
28f49616
JD		 1458 goto init_fail;
1459 }
b5d21704
DT		 1460 psmouse_info(psmouse,
1461 "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
1462 etd->hw_version, param[0], param[1], param[2]);
2a0bd75e 1463
b56b92a9 1464 if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
230282a7 1465 etd->capabilities)) {
b5d21704 1466 psmouse_err(psmouse, "failed to query capabilities.\n");
2a0bd75e
AO		 1467 goto init_fail;
1468 }
b5d21704
DT		 1469 psmouse_info(psmouse,
1470 "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
1471 etd->capabilities[0], etd->capabilities[1],
1472 etd->capabilities[2]);
2a0bd75e
AO		 1473
1474 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1475 psmouse_err(psmouse,
1476 "failed to put touchpad into absolute mode.\n");
2a0bd75e
AO		 1477 goto init_fail;
1478 }
1479
b9c40627
UDB		 1480 if (etd->fw_version == 0x381f17) {
1481 etd->original_set_rate = psmouse->set_rate;
1482 psmouse->set_rate = elantech_set_rate_restore_reg_07;
1483 }
1484
28f49616 1485 if (elantech_set_input_params(psmouse)) {
b5d21704 1486 psmouse_err(psmouse, "failed to query touchpad range.\n");
28f49616
JD		 1487 goto init_fail;
1488 }
2a0bd75e
AO		 1489
1490 error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
1491 &elantech_attr_group);
1492 if (error) {
b5d21704
DT		 1493 psmouse_err(psmouse,
1494 "failed to create sysfs attributes, error: %d.\n",
1495 error);
2a0bd75e
AO		 1496 goto init_fail;
1497 }
1498
1499 psmouse->protocol_handler = elantech_process_byte;
1500 psmouse->disconnect = elantech_disconnect;
1501 psmouse->reconnect = elantech_reconnect;
28f49616 1502 psmouse->pktsize = etd->hw_version > 1 ? 6 : 4;
2a0bd75e
AO		 1503
1504 return 0;
1505
1506 init_fail:
1507 kfree(etd);
1508 return -1;
1509}
kernel source for telekom puls (alcatel/mediatek)