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Input: ALPS - suppress message about 'Unknown touchpad'
[deliverable/linux.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>
36189cc3 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);
317 elantech_set_slot(dev, 1, num_fingers == 2, x2, y2);
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);
cd9e83e2
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;
cd9e83e2 494 struct elantech_data *etd = psmouse->private;
1dc6edec
JD		 495 unsigned char *packet = psmouse->packet;
496
cd9e83e2
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{
acc0444b 691 struct elantech_data *etd = psmouse->private;
28f49616
JD		 692 const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff };
693 unsigned char *packet = psmouse->packet;
694
695 /*
696 * check debounce first, it has the same signature in byte 0
697 * and byte 3 as PACKET_V3_HEAD.
698 */
699 if (!memcmp(packet, debounce_packet, sizeof(debounce_packet)))
700 return PACKET_DEBOUNCE;
701
acc0444b
MD		 702 /*
703 * If the hardware flag 'crc_enabled' is set the packets have
704 * different signatures.
705 */
706 if (etd->crc_enabled) {
707 if ((packet[3] & 0x09) == 0x08)
708 return PACKET_V3_HEAD;
709
710 if ((packet[3] & 0x09) == 0x09)
711 return PACKET_V3_TAIL;
712 } else {
713 if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02)
714 return PACKET_V3_HEAD;
28f49616 715
acc0444b
MD		 716 if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c)
717 return PACKET_V3_TAIL;
718 }
28f49616
JD		 719
720 return PACKET_UNKNOWN;
721}
722
1dc6edec
JD		 723static int elantech_packet_check_v4(struct psmouse *psmouse)
724{
acc0444b 725 struct elantech_data *etd = psmouse->private;
1dc6edec 726 unsigned char *packet = psmouse->packet;
9eebed7d 727 unsigned char packet_type = packet[3] & 0x03;
acc0444b
MD		 728 bool sanity_check;
729
730 /*
731 * Sanity check based on the constant bits of a packet.
732 * The constant bits change depending on the value of
733 * the hardware flag 'crc_enabled' but are the same for
734 * every packet, regardless of the type.
735 */
736 if (etd->crc_enabled)
737 sanity_check = ((packet[3] & 0x08) == 0x00);
738 else
739 sanity_check = ((packet[0] & 0x0c) == 0x04 &&
740 (packet[3] & 0x1c) == 0x10);
741
742 if (!sanity_check)
743 return PACKET_UNKNOWN;
1dc6edec 744
9eebed7d
MD		 745 switch (packet_type) {
746 case 0:
747 return PACKET_V4_STATUS;
748
749 case 1:
1dc6edec
JD		 750 return PACKET_V4_HEAD;
751
9eebed7d 752 case 2:
1dc6edec 753 return PACKET_V4_MOTION;
9eebed7d 754 }
1dc6edec
JD		 755
756 return PACKET_UNKNOWN;
757}
758
2a0bd75e
AO		 759/*
760 * Process byte stream from mouse and handle complete packets
761 */
762static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
763{
764 struct elantech_data *etd = psmouse->private;
28f49616 765 int packet_type;
2a0bd75e
AO		 766
767 if (psmouse->pktcnt < psmouse->pktsize)
768 return PSMOUSE_GOOD_DATA;
769
770 if (etd->debug > 1)
b5d21704 771 elantech_packet_dump(psmouse);
2a0bd75e
AO		 772
773 switch (etd->hw_version) {
774 case 1:
7894f21b 775 if (etd->paritycheck && !elantech_packet_check_v1(psmouse))
2a0bd75e
AO		 776 return PSMOUSE_BAD_DATA;
777
778 elantech_report_absolute_v1(psmouse);
779 break;
780
781 case 2:
84a90b61
JD		 782 /* ignore debounce */
783 if (elantech_debounce_check_v2(psmouse))
784 return PSMOUSE_FULL_PACKET;
785
7894f21b
JD		 786 if (etd->paritycheck && !elantech_packet_check_v2(psmouse))
787 return PSMOUSE_BAD_DATA;
788
2a0bd75e
AO		 789 elantech_report_absolute_v2(psmouse);
790 break;
28f49616
JD		 791
792 case 3:
793 packet_type = elantech_packet_check_v3(psmouse);
794 /* ignore debounce */
795 if (packet_type == PACKET_DEBOUNCE)
796 return PSMOUSE_FULL_PACKET;
797
798 if (packet_type == PACKET_UNKNOWN)
799 return PSMOUSE_BAD_DATA;
800
801 elantech_report_absolute_v3(psmouse, packet_type);
802 break;
1dc6edec
JD		 803
804 case 4:
805 packet_type = elantech_packet_check_v4(psmouse);
806 if (packet_type == PACKET_UNKNOWN)
807 return PSMOUSE_BAD_DATA;
808
809 elantech_report_absolute_v4(psmouse, packet_type);
810 break;
2a0bd75e
AO		 811 }
812
813 return PSMOUSE_FULL_PACKET;
814}
815
816/*
817 * Put the touchpad into absolute mode
818 */
819static int elantech_set_absolute_mode(struct psmouse *psmouse)
820{
821 struct elantech_data *etd = psmouse->private;
822 unsigned char val;
823 int tries = ETP_READ_BACK_TRIES;
824 int rc = 0;
825
826 switch (etd->hw_version) {
827 case 1:
828 etd->reg_10 = 0x16;
829 etd->reg_11 = 0x8f;
830 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
831 elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
832 rc = -1;
833 }
834 break;
835
836 case 2:
837 /* Windows driver values */
838 etd->reg_10 = 0x54;
839 etd->reg_11 = 0x88; /* 0x8a */
840 etd->reg_21 = 0x60; /* 0x00 */
841 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
842 elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
843 elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
844 rc = -1;
2a0bd75e 845 }
28f49616
JD		 846 break;
847
848 case 3:
36189cc3
HG		 849 if (etd->set_hw_resolution)
850 etd->reg_10 = 0x0b;
851 else
fb4f8f56 852 etd->reg_10 = 0x01;
36189cc3 853
28f49616
JD		 854 if (elantech_write_reg(psmouse, 0x10, etd->reg_10))
855 rc = -1;
856
857 break;
1dc6edec
JD		 858
859 case 4:
860 etd->reg_07 = 0x01;
861 if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
862 rc = -1;
863
864 goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */
b2546df6
AO		 865 }
866
867 if (rc == 0) {
2a0bd75e 868 /*
b2546df6
AO		 869 * Read back reg 0x10. For hardware version 1 we must make
870 * sure the absolute mode bit is set. For hardware version 2
b5d21704 871 * the touchpad is probably initializing and not ready until
b2546df6 872 * we read back the value we just wrote.
2a0bd75e
AO		 873 */
874 do {
875 rc = elantech_read_reg(psmouse, 0x10, &val);
876 if (rc == 0)
877 break;
878 tries--;
d4ae84a8 879 elantech_debug("retrying read (%d).\n", tries);
2a0bd75e
AO		 880 msleep(ETP_READ_BACK_DELAY);
881 } while (tries > 0);
b2546df6
AO		 882
883 if (rc) {
b5d21704
DT		 884 psmouse_err(psmouse,
885 "failed to read back register 0x10.\n");
b2546df6
AO		 886 } else if (etd->hw_version == 1 &&
887 !(val & ETP_R10_ABSOLUTE_MODE)) {
b5d21704
DT		 888 psmouse_err(psmouse,
889 "touchpad refuses to switch to absolute mode.\n");
b2546df6
AO		 890 rc = -1;
891 }
2a0bd75e
AO		 892 }
893
1dc6edec 894 skip_readback_reg_10:
2a0bd75e 895 if (rc)
b5d21704 896 psmouse_err(psmouse, "failed to initialise registers.\n");
2a0bd75e
AO		 897
898 return rc;
899}
900
28f49616
JD		 901static int elantech_set_range(struct psmouse *psmouse,
902 unsigned int *x_min, unsigned int *y_min,
1dc6edec
JD		 903 unsigned int *x_max, unsigned int *y_max,
904 unsigned int *width)
230282a7
JD		 905{
906 struct elantech_data *etd = psmouse->private;
28f49616 907 unsigned char param[3];
1dc6edec 908 unsigned char traces;
230282a7
JD		 909
910 switch (etd->hw_version) {
911 case 1:
912 *x_min = ETP_XMIN_V1;
913 *y_min = ETP_YMIN_V1;
914 *x_max = ETP_XMAX_V1;
915 *y_max = ETP_YMAX_V1;
916 break;
917
918 case 2:
919 if (etd->fw_version == 0x020800 ||
920 etd->fw_version == 0x020b00 ||
921 etd->fw_version == 0x020030) {
922 *x_min = ETP_XMIN_V2;
923 *y_min = ETP_YMIN_V2;
924 *x_max = ETP_XMAX_V2;
925 *y_max = ETP_YMAX_V2;
926 } else {
84a90b61
JD		 927 int i;
928 int fixed_dpi;
929
230282a7
JD		 930 i = (etd->fw_version > 0x020800 &&
931 etd->fw_version < 0x020900) ? 1 : 2;
84a90b61 932
b56b92a9 933 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
84a90b61
JD		 934 return -1;
935
936 fixed_dpi = param[1] & 0x10;
937
938 if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
b56b92a9 939 if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
84a90b61
JD		 940 return -1;
941
942 *x_max = (etd->capabilities[1] - i) * param[1] / 2;
943 *y_max = (etd->capabilities[2] - i) * param[2] / 2;
944 } else if (etd->fw_version == 0x040216) {
945 *x_max = 819;
946 *y_max = 405;
947 } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) {
948 *x_max = 900;
949 *y_max = 500;
950 } else {
951 *x_max = (etd->capabilities[1] - i) * 64;
952 *y_max = (etd->capabilities[2] - i) * 64;
953 }
230282a7
JD		 954 }
955 break;
28f49616
JD		 956
957 case 3:
b56b92a9 958 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
28f49616
JD		 959 return -1;
960
961 *x_max = (0x0f & param[0]) << 8 | param[1];
962 *y_max = (0xf0 & param[0]) << 4 | param[2];
963 break;
1dc6edec
JD		 964
965 case 4:
b56b92a9 966 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
1dc6edec
JD		 967 return -1;
968
969 *x_max = (0x0f & param[0]) << 8 | param[1];
970 *y_max = (0xf0 & param[0]) << 4 | param[2];
971 traces = etd->capabilities[1];
972 if ((traces < 2) || (traces > *x_max))
973 return -1;
974
975 *width = *x_max / (traces - 1);
976 break;
230282a7 977 }
28f49616
JD		 978
979 return 0;
230282a7
JD		 980}
981
3d95fd6a
JD		 982/*
983 * (value from firmware) * 10 + 790 = dpi
984 * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
985 */
986static unsigned int elantech_convert_res(unsigned int val)
987{
988 return (val * 10 + 790) * 10 / 254;
989}
990
991static int elantech_get_resolution_v4(struct psmouse *psmouse,
992 unsigned int *x_res,
993 unsigned int *y_res)
994{
995 unsigned char param[3];
996
997 if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param))
998 return -1;
999
1000 *x_res = elantech_convert_res(param[1] & 0x0f);
1001 *y_res = elantech_convert_res((param[1] & 0xf0) >> 4);
1002
1003 return 0;
1004}
1005
c15bdfd5
HG		 1006/*
1007 * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in
1008 * fw_version for this is based on the following fw_version & caps table:
1009 *
1010 * Laptop-model: fw_version: caps: buttons:
1011 * Acer S3 0x461f00 10, 13, 0e clickpad
1012 * Acer S7-392 0x581f01 50, 17, 0d clickpad
1013 * Acer V5-131 0x461f02 01, 16, 0c clickpad
1014 * Acer V5-551 0x461f00 ? clickpad
1015 * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons
1016 * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons
1017 * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons
1018 * Asus UX31 0x361f00 20, 15, 0e clickpad
1019 * Asus UX32VD 0x361f02 00, 15, 0e clickpad
1020 * Avatar AVIU-145A2 0x361f00 ? clickpad
1021 * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons
1022 * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*)
1023 * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons
1024 * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad
1025 * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad
1026 * Samsung NP900X3E-A02 0x575f03 ? clickpad
1027 * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad
1028 * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons
1029 * Samsung RF710 0x450f00 ? 2 hw buttons
1030 * System76 Pangolin 0x250f01 ? 2 hw buttons
1031 * (*) + 3 trackpoint buttons
1032 */
1033static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
1034{
1035 struct input_dev *dev = psmouse->dev;
1036 struct elantech_data *etd = psmouse->private;
1037
1038 if (etd->fw_version & 0x001000) {
1039 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1040 __clear_bit(BTN_RIGHT, dev->keybit);
1041 }
1042}
1043
2a0bd75e
AO		 1044/*
1045 * Set the appropriate event bits for the input subsystem
1046 */
28f49616 1047static int elantech_set_input_params(struct psmouse *psmouse)
2a0bd75e
AO		 1048{
1049 struct input_dev *dev = psmouse->dev;
1050 struct elantech_data *etd = psmouse->private;
1dc6edec 1051 unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
3d95fd6a 1052 unsigned int x_res = 0, y_res = 0;
230282a7 1053
1dc6edec 1054 if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
28f49616 1055 return -1;
2a0bd75e 1056
e3dde4fb 1057 __set_bit(INPUT_PROP_POINTER, dev->propbit);
2a0bd75e
AO		 1058 __set_bit(EV_KEY, dev->evbit);
1059 __set_bit(EV_ABS, dev->evbit);
c7a1f3cc 1060 __clear_bit(EV_REL, dev->evbit);
2a0bd75e
AO		 1061
1062 __set_bit(BTN_LEFT, dev->keybit);
1063 __set_bit(BTN_RIGHT, dev->keybit);
1064
1065 __set_bit(BTN_TOUCH, dev->keybit);
1066 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1067 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1068 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1069
1070 switch (etd->hw_version) {
1071 case 1:
1072 /* Rocker button */
504e8bee 1073 if (etd->fw_version < 0x020000 &&
230282a7 1074 (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
2a0bd75e
AO		 1075 __set_bit(BTN_FORWARD, dev->keybit);
1076 __set_bit(BTN_BACK, dev->keybit);
1077 }
230282a7
JD		 1078 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1079 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
2a0bd75e
AO		 1080 break;
1081
1082 case 2:
22462d9f 1083 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
28f49616
JD		 1084 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1085 /* fall through */
1086 case 3:
c15bdfd5
HG		 1087 if (etd->hw_version == 3)
1088 elantech_set_buttonpad_prop(psmouse);
230282a7
JD		 1089 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1090 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
f941c705
ÉP		 1091 if (etd->reports_pressure) {
1092 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1093 ETP_PMAX_V2, 0, 0);
1094 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1095 ETP_WMAX_V2, 0, 0);
1096 }
b4adbbef 1097 input_mt_init_slots(dev, 2, 0);
230282a7
JD		 1098 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1099 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
2a0bd75e 1100 break;
1dc6edec
JD		 1101
1102 case 4:
3d95fd6a
JD		 1103 if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) {
1104 /*
1105 * if query failed, print a warning and leave the values
1106 * zero to resemble synaptics.c behavior.
1107 */
1108 psmouse_warn(psmouse, "couldn't query resolution data.\n");
1109 }
c15bdfd5 1110 elantech_set_buttonpad_prop(psmouse);
1dc6edec
JD		 1111 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1112 /* For X to recognize me as touchpad. */
1113 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1114 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
3d95fd6a
JD		 1115 input_abs_set_res(dev, ABS_X, x_res);
1116 input_abs_set_res(dev, ABS_Y, y_res);
1dc6edec
JD		 1117 /*
1118 * range of pressure and width is the same as v2,
1119 * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
1120 */
1121 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1122 ETP_PMAX_V2, 0, 0);
1123 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1124 ETP_WMAX_V2, 0, 0);
1125 /* Multitouch capable pad, up to 5 fingers. */
b4adbbef 1126 input_mt_init_slots(dev, ETP_MAX_FINGERS, 0);
1dc6edec
JD		 1127 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1128 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
3d95fd6a
JD		 1129 input_abs_set_res(dev, ABS_MT_POSITION_X, x_res);
1130 input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res);
1dc6edec
JD		 1131 input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2,
1132 ETP_PMAX_V2, 0, 0);
1133 /*
1134 * The firmware reports how many trace lines the finger spans,
1135 * convert to surface unit as Protocol-B requires.
1136 */
1137 input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0,
1138 ETP_WMAX_V2 * width, 0, 0);
1139 break;
2a0bd75e 1140 }
230282a7
JD		 1141
1142 etd->y_max = y_max;
1dc6edec 1143 etd->width = width;
28f49616
JD		 1144
1145 return 0;
2a0bd75e
AO		 1146}
1147
1148struct elantech_attr_data {
1149 size_t field_offset;
1150 unsigned char reg;
1151};
1152
1153/*
1154 * Display a register value by reading a sysfs entry
1155 */
1156static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
1157 char *buf)
1158{
1159 struct elantech_data *etd = psmouse->private;
1160 struct elantech_attr_data *attr = data;
1161 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
1162 int rc = 0;
1163
1164 if (attr->reg)
1165 rc = elantech_read_reg(psmouse, attr->reg, reg);
1166
1167 return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
1168}
1169
1170/*
1171 * Write a register value by writing a sysfs entry
1172 */
1173static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
1174 void *data, const char *buf, size_t count)
1175{
1176 struct elantech_data *etd = psmouse->private;
1177 struct elantech_attr_data *attr = data;
1178 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
76496e7a 1179 unsigned char value;
2a0bd75e
AO		 1180 int err;
1181
76496e7a 1182 err = kstrtou8(buf, 16, &value);
2a0bd75e
AO		 1183 if (err)
1184 return err;
1185
2a0bd75e
AO		 1186 /* Do we need to preserve some bits for version 2 hardware too? */
1187 if (etd->hw_version == 1) {
1188 if (attr->reg == 0x10)
1189 /* Force absolute mode always on */
1190 value |= ETP_R10_ABSOLUTE_MODE;
1191 else if (attr->reg == 0x11)
1192 /* Force 4 byte mode always on */
1193 value |= ETP_R11_4_BYTE_MODE;
1194 }
1195
1196 if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
1197 *reg = value;
1198
1199 return count;
1200}
1201
1202#define ELANTECH_INT_ATTR(_name, _register) \
1203 static struct elantech_attr_data elantech_attr_##_name = { \
1204 .field_offset = offsetof(struct elantech_data, _name), \
1205 .reg = _register, \
1206 }; \
1207 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
1208 &elantech_attr_##_name, \
1209 elantech_show_int_attr, \
1210 elantech_set_int_attr)
1211
1dc6edec 1212ELANTECH_INT_ATTR(reg_07, 0x07);
2a0bd75e
AO		 1213ELANTECH_INT_ATTR(reg_10, 0x10);
1214ELANTECH_INT_ATTR(reg_11, 0x11);
1215ELANTECH_INT_ATTR(reg_20, 0x20);
1216ELANTECH_INT_ATTR(reg_21, 0x21);
1217ELANTECH_INT_ATTR(reg_22, 0x22);
1218ELANTECH_INT_ATTR(reg_23, 0x23);
1219ELANTECH_INT_ATTR(reg_24, 0x24);
1220ELANTECH_INT_ATTR(reg_25, 0x25);
1221ELANTECH_INT_ATTR(reg_26, 0x26);
1222ELANTECH_INT_ATTR(debug, 0);
1223ELANTECH_INT_ATTR(paritycheck, 0);
1224
1225static struct attribute *elantech_attrs[] = {
1dc6edec 1226 &psmouse_attr_reg_07.dattr.attr,
2a0bd75e
AO		 1227 &psmouse_attr_reg_10.dattr.attr,
1228 &psmouse_attr_reg_11.dattr.attr,
1229 &psmouse_attr_reg_20.dattr.attr,
1230 &psmouse_attr_reg_21.dattr.attr,
1231 &psmouse_attr_reg_22.dattr.attr,
1232 &psmouse_attr_reg_23.dattr.attr,
1233 &psmouse_attr_reg_24.dattr.attr,
1234 &psmouse_attr_reg_25.dattr.attr,
1235 &psmouse_attr_reg_26.dattr.attr,
1236 &psmouse_attr_debug.dattr.attr,
1237 &psmouse_attr_paritycheck.dattr.attr,
1238 NULL
1239};
1240
1241static struct attribute_group elantech_attr_group = {
1242 .attrs = elantech_attrs,
1243};
1244
a083632e
DT		 1245static bool elantech_is_signature_valid(const unsigned char *param)
1246{
1247 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 };
1248 int i;
1249
1250 if (param[0] == 0)
1251 return false;
1252
1253 if (param[1] == 0)
1254 return true;
1255
1256 for (i = 0; i < ARRAY_SIZE(rates); i++)
1257 if (param[2] == rates[i])
1258 return false;
1259
1260 return true;
1261}
1262
2a0bd75e
AO		 1263/*
1264 * Use magic knock to detect Elantech touchpad
1265 */
b7802c5c 1266int elantech_detect(struct psmouse *psmouse, bool set_properties)
2a0bd75e
AO		 1267{
1268 struct ps2dev *ps2dev = &psmouse->ps2dev;
1269 unsigned char param[3];
1270
1271 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1272
1273 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1274 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1275 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1276 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1277 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
b5d21704 1278 psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n");
2a0bd75e
AO		 1279 return -1;
1280 }
1281
1282 /*
1283 * Report this in case there are Elantech models that use a different
1284 * set of magic numbers
1285 */
28f49616
JD		 1286 if (param[0] != 0x3c || param[1] != 0x03 ||
1287 (param[2] != 0xc8 && param[2] != 0x00)) {
b5d21704
DT		 1288 psmouse_dbg(psmouse,
1289 "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
1290 param[0], param[1], param[2]);
9ab7b25e
AO		 1291 return -1;
1292 }
1293
1294 /*
1295 * Query touchpad's firmware version and see if it reports known
1296 * value to avoid mis-detection. Logitech mice are known to respond
1297 * to Elantech magic knock and there might be more.
1298 */
1299 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1300 psmouse_dbg(psmouse, "failed to query firmware version.\n");
9ab7b25e
AO		 1301 return -1;
1302 }
1303
b5d21704
DT		 1304 psmouse_dbg(psmouse,
1305 "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
1306 param[0], param[1], param[2]);
9ab7b25e 1307
a083632e 1308 if (!elantech_is_signature_valid(param)) {
b5d21704
DT		 1309 psmouse_dbg(psmouse,
1310 "Probably not a real Elantech touchpad. Aborting.\n");
4af61e90 1311 return -1;
2a0bd75e
AO		 1312 }
1313
1314 if (set_properties) {
1315 psmouse->vendor = "Elantech";
1316 psmouse->name = "Touchpad";
1317 }
1318
1319 return 0;
1320}
1321
1322/*
1323 * Clean up sysfs entries when disconnecting
1324 */
1325static void elantech_disconnect(struct psmouse *psmouse)
1326{
1327 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1328 &elantech_attr_group);
1329 kfree(psmouse->private);
1330 psmouse->private = NULL;
1331}
1332
1333/*
1334 * Put the touchpad back into absolute mode when reconnecting
1335 */
1336static int elantech_reconnect(struct psmouse *psmouse)
1337{
a67ada7a
JD		 1338 psmouse_reset(psmouse);
1339
2a0bd75e
AO		 1340 if (elantech_detect(psmouse, 0))
1341 return -1;
1342
1343 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1344 psmouse_err(psmouse,
1345 "failed to put touchpad back into absolute mode.\n");
2a0bd75e
AO		 1346 return -1;
1347 }
1348
1349 return 0;
1350}
1351
36189cc3 1352/*
fb4f8f56
HG		 1353 * Some hw_version 3 models go into error state when we try to set
1354 * bit 3 and/or bit 1 of r10.
36189cc3
HG		 1355 */
1356static const struct dmi_system_id no_hw_res_dmi_table[] = {
1357#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1358 {
1359 /* Gigabyte U2442 */
1360 .matches = {
1361 DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
1362 DMI_MATCH(DMI_PRODUCT_NAME, "U2442"),
1363 },
1364 },
1365#endif
1366 { }
1367};
1368
3c8bbb95
JD		 1369/*
1370 * determine hardware version and set some properties according to it.
1371 */
28f49616 1372static int elantech_set_properties(struct elantech_data *etd)
3c8bbb95 1373{
3940d618 1374 /* This represents the version of IC body. */
1dc6edec
JD		 1375 int ver = (etd->fw_version & 0x0f0000) >> 16;
1376
3940d618 1377 /* Early version of Elan touchpads doesn't obey the rule. */
3c8bbb95
JD		 1378 if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
1379 etd->hw_version = 1;
3940d618
JD		 1380 else {
1381 switch (ver) {
1382 case 2:
1383 case 4:
1384 etd->hw_version = 2;
1385 break;
1386 case 5:
1387 etd->hw_version = 3;
1388 break;
1389 case 6:
9eebed7d 1390 case 7:
9cb80b96 1391 case 8:
ae4bedf0 1392 case 9:
3940d618
JD		 1393 etd->hw_version = 4;
1394 break;
1395 default:
1396 return -1;
1397 }
1398 }
3c8bbb95 1399
b56b92a9
JD		 1400 /* decide which send_cmd we're gonna use early */
1401 etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :
1402 synaptics_send_cmd;
1403
1404 /* Turn on packet checking by default */
3c8bbb95
JD		 1405 etd->paritycheck = 1;
1406
1407 /*
1408 * This firmware suffers from misreporting coordinates when
1409 * a touch action starts causing the mouse cursor or scrolled page
1410 * to jump. Enable a workaround.
1411 */
1412 etd->jumpy_cursor =
1413 (etd->fw_version == 0x020022 || etd->fw_version == 0x020600);
1414
28f49616 1415 if (etd->hw_version > 1) {
3c8bbb95
JD		 1416 /* For now show extra debug information */
1417 etd->debug = 1;
1418
1419 if (etd->fw_version >= 0x020800)
1420 etd->reports_pressure = true;
1421 }
28f49616 1422
acc0444b
MD		 1423 /*
1424 * The signatures of v3 and v4 packets change depending on the
1425 * value of this hardware flag.
1426 */
1427 etd->crc_enabled = ((etd->fw_version & 0x4000) == 0x4000);
1428
36189cc3
HG		 1429 /* Enable real hardware resolution on hw_version 3 ? */
1430 etd->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);
1431
28f49616 1432 return 0;
3c8bbb95
JD		 1433}
1434
2a0bd75e
AO		 1435/*
1436 * Initialize the touchpad and create sysfs entries
1437 */
1438int elantech_init(struct psmouse *psmouse)
1439{
1440 struct elantech_data *etd;
1441 int i, error;
1442 unsigned char param[3];
1443
9ab7b25e 1444 psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
2a0bd75e 1445 if (!etd)
6792cbbb 1446 return -ENOMEM;
2a0bd75e 1447
a67ada7a
JD		 1448 psmouse_reset(psmouse);
1449
2a0bd75e
AO		 1450 etd->parity[0] = 1;
1451 for (i = 1; i < 256; i++)
1452 etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
1453
1454 /*
9ab7b25e 1455 * Do the version query again so we can store the result
2a0bd75e
AO		 1456 */
1457 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1458 psmouse_err(psmouse, "failed to query firmware version.\n");
2a0bd75e
AO		 1459 goto init_fail;
1460 }
504e8bee 1461 etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
28f49616
JD		 1462
1463 if (elantech_set_properties(etd)) {
b5d21704 1464 psmouse_err(psmouse, "unknown hardware version, aborting...\n");
28f49616
JD		 1465 goto init_fail;
1466 }
b5d21704
DT		 1467 psmouse_info(psmouse,
1468 "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
1469 etd->hw_version, param[0], param[1], param[2]);
2a0bd75e 1470
b56b92a9 1471 if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
230282a7 1472 etd->capabilities)) {
b5d21704 1473 psmouse_err(psmouse, "failed to query capabilities.\n");
2a0bd75e
AO		 1474 goto init_fail;
1475 }
b5d21704
DT		 1476 psmouse_info(psmouse,
1477 "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
1478 etd->capabilities[0], etd->capabilities[1],
1479 etd->capabilities[2]);
2a0bd75e
AO		 1480
1481 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1482 psmouse_err(psmouse,
1483 "failed to put touchpad into absolute mode.\n");
2a0bd75e
AO		 1484 goto init_fail;
1485 }
1486
28f49616 1487 if (elantech_set_input_params(psmouse)) {
b5d21704 1488 psmouse_err(psmouse, "failed to query touchpad range.\n");
28f49616
JD		 1489 goto init_fail;
1490 }
2a0bd75e
AO		 1491
1492 error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
1493 &elantech_attr_group);
1494 if (error) {
b5d21704
DT		 1495 psmouse_err(psmouse,
1496 "failed to create sysfs attributes, error: %d.\n",
1497 error);
2a0bd75e
AO		 1498 goto init_fail;
1499 }
1500
1501 psmouse->protocol_handler = elantech_process_byte;
1502 psmouse->disconnect = elantech_disconnect;
1503 psmouse->reconnect = elantech_reconnect;
28f49616 1504 psmouse->pktsize = etd->hw_version > 1 ? 6 : 4;
2a0bd75e
AO		 1505
1506 return 0;
1507
1508 init_fail:
1509 kfree(etd);
1510 return -1;
1511}
Linux kernel - Deliverables
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