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Merge remote-tracking branches 'asoc/topic/rt5645', 'asoc/topic/sam9g20_wm8731',...
[linux-2.6-block.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>
a2418fc4 21#include <asm/unaligned.h>
2a0bd75e
AO		 22#include "psmouse.h"
23#include "elantech.h"
24
d4ae84a8
DT		 25#define elantech_debug(fmt, ...) \
26 do { \
27 if (etd->debug) \
b5d21704
DT		 28 psmouse_printk(KERN_DEBUG, psmouse, \
29 fmt, ##__VA_ARGS__); \
2a0bd75e
AO		 30 } while (0)
31
32/*
33 * Send a Synaptics style sliced query command
34 */
35static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
36 unsigned char *param)
37{
38 if (psmouse_sliced_command(psmouse, c) ||
39 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
b5d21704 40 psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
2a0bd75e
AO		 41 return -1;
42 }
43
44 return 0;
45}
46
b56b92a9
JD		 47/*
48 * V3 and later support this fast command
49 */
50static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c,
51 unsigned char *param)
52{
53 struct ps2dev *ps2dev = &psmouse->ps2dev;
54
55 if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
56 ps2_command(ps2dev, NULL, c) ||
57 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
58 psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
59 return -1;
60 }
61
62 return 0;
63}
64
2a0bd75e
AO		 65/*
66 * A retrying version of ps2_command
67 */
68static int elantech_ps2_command(struct psmouse *psmouse,
69 unsigned char *param, int command)
70{
71 struct ps2dev *ps2dev = &psmouse->ps2dev;
72 struct elantech_data *etd = psmouse->private;
73 int rc;
74 int tries = ETP_PS2_COMMAND_TRIES;
75
76 do {
77 rc = ps2_command(ps2dev, param, command);
78 if (rc == 0)
79 break;
80 tries--;
d4ae84a8
DT		 81 elantech_debug("retrying ps2 command 0x%02x (%d).\n",
82 command, tries);
2a0bd75e
AO		 83 msleep(ETP_PS2_COMMAND_DELAY);
84 } while (tries > 0);
85
86 if (rc)
b5d21704 87 psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command);
2a0bd75e
AO		 88
89 return rc;
90}
91
92/*
93 * Send an Elantech style special command to read a value from a register
94 */
95static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
96 unsigned char *val)
97{
98 struct elantech_data *etd = psmouse->private;
99 unsigned char param[3];
100 int rc = 0;
101
1dc6edec 102 if (reg < 0x07 || reg > 0x26)
2a0bd75e
AO		 103 return -1;
104
105 if (reg > 0x11 && reg < 0x20)
106 return -1;
107
108 switch (etd->hw_version) {
109 case 1:
110 if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) ||
111 psmouse_sliced_command(psmouse, reg) ||
112 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
113 rc = -1;
114 }
115 break;
116
117 case 2:
118 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
119 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) ||
120 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
121 elantech_ps2_command(psmouse, NULL, reg) ||
122 elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
123 rc = -1;
124 }
125 break;
28f49616 126
1dc6edec 127 case 3 ... 4:
28f49616
JD		 128 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
129 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
130 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
131 elantech_ps2_command(psmouse, NULL, reg) ||
132 elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
133 rc = -1;
134 }
135 break;
2a0bd75e
AO		 136 }
137
138 if (rc)
b5d21704 139 psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg);
1dc6edec 140 else if (etd->hw_version != 4)
2a0bd75e 141 *val = param[0];
1dc6edec
JD		 142 else
143 *val = param[1];
2a0bd75e
AO		 144
145 return rc;
146}
147
148/*
149 * Send an Elantech style special command to write a register with a value
150 */
151static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
152 unsigned char val)
153{
154 struct elantech_data *etd = psmouse->private;
155 int rc = 0;
156
1dc6edec 157 if (reg < 0x07 || reg > 0x26)
2a0bd75e
AO		 158 return -1;
159
160 if (reg > 0x11 && reg < 0x20)
161 return -1;
162
163 switch (etd->hw_version) {
164 case 1:
165 if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) ||
166 psmouse_sliced_command(psmouse, reg) ||
167 psmouse_sliced_command(psmouse, val) ||
168 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
169 rc = -1;
170 }
171 break;
172
173 case 2:
174 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
175 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) ||
176 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
177 elantech_ps2_command(psmouse, NULL, reg) ||
178 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
179 elantech_ps2_command(psmouse, NULL, val) ||
180 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
181 rc = -1;
182 }
183 break;
28f49616
JD		 184
185 case 3:
186 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
187 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
188 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
189 elantech_ps2_command(psmouse, NULL, reg) ||
190 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
191 elantech_ps2_command(psmouse, NULL, val) ||
192 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
193 rc = -1;
194 }
195 break;
1dc6edec
JD		 196
197 case 4:
198 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
199 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
200 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
201 elantech_ps2_command(psmouse, NULL, reg) ||
202 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
203 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) ||
204 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
205 elantech_ps2_command(psmouse, NULL, val) ||
206 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
207 rc = -1;
208 }
209 break;
2a0bd75e
AO		 210 }
211
212 if (rc)
b5d21704
DT		 213 psmouse_err(psmouse,
214 "failed to write register 0x%02x with value 0x%02x.\n",
215 reg, val);
2a0bd75e
AO		 216
217 return rc;
218}
219
220/*
221 * Dump a complete mouse movement packet to the syslog
222 */
b5d21704 223static void elantech_packet_dump(struct psmouse *psmouse)
2a0bd75e 224{
014420fe
BT		 225 psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n",
226 psmouse->pktsize, psmouse->packet);
2a0bd75e
AO		 227}
228
229/*
230 * Interpret complete data packets and report absolute mode input events for
231 * hardware version 1. (4 byte packets)
232 */
233static void elantech_report_absolute_v1(struct psmouse *psmouse)
234{
235 struct input_dev *dev = psmouse->dev;
236 struct elantech_data *etd = psmouse->private;
237 unsigned char *packet = psmouse->packet;
238 int fingers;
239
504e8bee 240 if (etd->fw_version < 0x020000) {
e938fbfd
FR		 241 /*
242 * byte 0: D U p1 p2 1 p3 R L
243 * byte 1: f 0 th tw x9 x8 y9 y8
244 */
2a0bd75e
AO		 245 fingers = ((packet[1] & 0x80) >> 7) +
246 ((packet[1] & 0x30) >> 4);
247 } else {
e938fbfd
FR		 248 /*
249 * byte 0: n1 n0 p2 p1 1 p3 R L
250 * byte 1: 0 0 0 0 x9 x8 y9 y8
251 */
2a0bd75e
AO		 252 fingers = (packet[0] & 0xc0) >> 6;
253 }
254
3f8c0df4 255 if (etd->jumpy_cursor) {
7f29f17b
ÉP		 256 if (fingers != 1) {
257 etd->single_finger_reports = 0;
258 } else if (etd->single_finger_reports < 2) {
259 /* Discard first 2 reports of one finger, bogus */
260 etd->single_finger_reports++;
d4ae84a8 261 elantech_debug("discarding packet\n");
7f29f17b 262 return;
3f8c0df4
AO		 263 }
264 }
265
2a0bd75e
AO		 266 input_report_key(dev, BTN_TOUCH, fingers != 0);
267
e938fbfd
FR		 268 /*
269 * byte 2: x7 x6 x5 x4 x3 x2 x1 x0
270 * byte 3: y7 y6 y5 y4 y3 y2 y1 y0
271 */
2a0bd75e
AO		 272 if (fingers) {
273 input_report_abs(dev, ABS_X,
274 ((packet[1] & 0x0c) << 6) | packet[2]);
e938fbfd 275 input_report_abs(dev, ABS_Y,
230282a7 276 etd->y_max - (((packet[1] & 0x03) << 8) | packet[3]));
2a0bd75e
AO		 277 }
278
279 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
280 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
281 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
282 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
283 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
284
504e8bee 285 if (etd->fw_version < 0x020000 &&
230282a7 286 (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
2a0bd75e
AO		 287 /* rocker up */
288 input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
289 /* rocker down */
290 input_report_key(dev, BTN_BACK, packet[0] & 0x80);
291 }
292
293 input_sync(dev);
294}
295
89eec4d7
ÉP		 296static void elantech_set_slot(struct input_dev *dev, int slot, bool active,
297 unsigned int x, unsigned int y)
298{
299 input_mt_slot(dev, slot);
300 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
301 if (active) {
302 input_report_abs(dev, ABS_MT_POSITION_X, x);
303 input_report_abs(dev, ABS_MT_POSITION_Y, y);
304 }
305}
306
307/* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */
308static void elantech_report_semi_mt_data(struct input_dev *dev,
309 unsigned int num_fingers,
310 unsigned int x1, unsigned int y1,
311 unsigned int x2, unsigned int y2)
312{
313 elantech_set_slot(dev, 0, num_fingers != 0, x1, y1);
3c0213d1 314 elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2);
89eec4d7
ÉP		 315}
316
2a0bd75e
AO		 317/*
318 * Interpret complete data packets and report absolute mode input events for
319 * hardware version 2. (6 byte packets)
320 */
321static void elantech_report_absolute_v2(struct psmouse *psmouse)
322{
f941c705 323 struct elantech_data *etd = psmouse->private;
2a0bd75e
AO		 324 struct input_dev *dev = psmouse->dev;
325 unsigned char *packet = psmouse->packet;
461a7917
JD		 326 unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
327 unsigned int width = 0, pres = 0;
2a0bd75e
AO		 328
329 /* byte 0: n1 n0 . . . . R L */
330 fingers = (packet[0] & 0xc0) >> 6;
2a0bd75e
AO		 331
332 switch (fingers) {
22462d9f
ÉP		 333 case 3:
334 /*
335 * Same as one finger, except report of more than 3 fingers:
336 * byte 3: n4 . w1 w0 . . . .
337 */
338 if (packet[3] & 0x80)
339 fingers = 4;
340 /* pass through... */
2a0bd75e 341 case 1:
e938fbfd 342 /*
11559619 343 * byte 1: . . . . x11 x10 x9 x8
e938fbfd
FR		 344 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
345 */
11559619 346 x1 = ((packet[1] & 0x0f) << 8) | packet[2];
e938fbfd 347 /*
11559619 348 * byte 4: . . . . y11 y10 y9 y8
e938fbfd
FR		 349 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
350 */
230282a7 351 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
89eec4d7 352
f941c705
ÉP		 353 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
354 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
2a0bd75e
AO		 355 break;
356
357 case 2:
e938fbfd
FR		 358 /*
359 * The coordinate of each finger is reported separately
360 * with a lower resolution for two finger touches:
361 * byte 0: . . ay8 ax8 . . . .
362 * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
363 */
461a7917 364 x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2;
2a0bd75e 365 /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
230282a7 366 y1 = etd->y_max -
461a7917 367 ((((packet[0] & 0x20) << 3) | packet[2]) << 2);
e938fbfd
FR		 368 /*
369 * byte 3: . . by8 bx8 . . . .
370 * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0
371 */
461a7917 372 x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2;
2a0bd75e 373 /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
230282a7 374 y2 = etd->y_max -
461a7917 375 ((((packet[3] & 0x20) << 3) | packet[5]) << 2);
f941c705
ÉP		 376
377 /* Unknown so just report sensible values */
378 pres = 127;
379 width = 7;
2a0bd75e
AO		 380 break;
381 }
382
461a7917
JD		 383 input_report_key(dev, BTN_TOUCH, fingers != 0);
384 if (fingers != 0) {
385 input_report_abs(dev, ABS_X, x1);
386 input_report_abs(dev, ABS_Y, y1);
387 }
89eec4d7 388 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
2a0bd75e
AO		 389 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
390 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
391 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
22462d9f 392 input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4);
2a0bd75e
AO		 393 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
394 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
f941c705
ÉP		 395 if (etd->reports_pressure) {
396 input_report_abs(dev, ABS_PRESSURE, pres);
397 input_report_abs(dev, ABS_TOOL_WIDTH, width);
398 }
2a0bd75e
AO		 399
400 input_sync(dev);
401}
402
a2418fc4
UDB		 403static void elantech_report_trackpoint(struct psmouse *psmouse,
404 int packet_type)
405{
406 /*
407 * byte 0: 0 0 sx sy 0 M R L
408 * byte 1:~sx 0 0 0 0 0 0 0
409 * byte 2:~sy 0 0 0 0 0 0 0
410 * byte 3: 0 0 ~sy ~sx 0 1 1 0
411 * byte 4: x7 x6 x5 x4 x3 x2 x1 x0
412 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
413 *
414 * x and y are written in two's complement spread
415 * over 9 bits with sx/sy the relative top bit and
416 * x7..x0 and y7..y0 the lower bits.
417 * The sign of y is opposite to what the input driver
418 * expects for a relative movement
419 */
420
421 struct elantech_data *etd = psmouse->private;
422 struct input_dev *tp_dev = etd->tp_dev;
423 unsigned char *packet = psmouse->packet;
424 int x, y;
425 u32 t;
426
a2418fc4
UDB		 427 t = get_unaligned_le32(&packet[0]);
428
429 switch (t & ~7U) {
430 case 0x06000030U:
431 case 0x16008020U:
432 case 0x26800010U:
433 case 0x36808000U:
434 x = packet[4] - (int)((packet[1]^0x80) << 1);
435 y = (int)((packet[2]^0x80) << 1) - packet[5];
436
437 input_report_key(tp_dev, BTN_LEFT, packet[0] & 0x01);
438 input_report_key(tp_dev, BTN_RIGHT, packet[0] & 0x02);
439 input_report_key(tp_dev, BTN_MIDDLE, packet[0] & 0x04);
440
441 input_report_rel(tp_dev, REL_X, x);
442 input_report_rel(tp_dev, REL_Y, y);
443
444 input_sync(tp_dev);
445
446 break;
447
448 default:
449 /* Dump unexpected packet sequences if debug=1 (default) */
450 if (etd->debug == 1)
451 elantech_packet_dump(psmouse);
452
453 break;
454 }
455}
456
28f49616
JD		 457/*
458 * Interpret complete data packets and report absolute mode input events for
459 * hardware version 3. (12 byte packets for two fingers)
460 */
461static void elantech_report_absolute_v3(struct psmouse *psmouse,
462 int packet_type)
463{
464 struct input_dev *dev = psmouse->dev;
465 struct elantech_data *etd = psmouse->private;
466 unsigned char *packet = psmouse->packet;
467 unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
468 unsigned int width = 0, pres = 0;
469
470 /* byte 0: n1 n0 . . . . R L */
471 fingers = (packet[0] & 0xc0) >> 6;
472
473 switch (fingers) {
474 case 3:
475 case 1:
476 /*
477 * byte 1: . . . . x11 x10 x9 x8
478 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
479 */
480 x1 = ((packet[1] & 0x0f) << 8) | packet[2];
481 /*
482 * byte 4: . . . . y11 y10 y9 y8
483 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
484 */
485 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
486 break;
487
488 case 2:
489 if (packet_type == PACKET_V3_HEAD) {
490 /*
491 * byte 1: . . . . ax11 ax10 ax9 ax8
492 * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
493 */
1dc6edec 494 etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2];
28f49616
JD		 495 /*
496 * byte 4: . . . . ay11 ay10 ay9 ay8
497 * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0
498 */
1dc6edec 499 etd->mt[0].y = etd->y_max -
28f49616
JD		 500 (((packet[4] & 0x0f) << 8) | packet[5]);
501 /*
502 * wait for next packet
503 */
504 return;
505 }
506
507 /* packet_type == PACKET_V3_TAIL */
1dc6edec
JD		 508 x1 = etd->mt[0].x;
509 y1 = etd->mt[0].y;
28f49616
JD		 510 x2 = ((packet[1] & 0x0f) << 8) | packet[2];
511 y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
512 break;
513 }
514
515 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
516 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
517
518 input_report_key(dev, BTN_TOUCH, fingers != 0);
519 if (fingers != 0) {
520 input_report_abs(dev, ABS_X, x1);
521 input_report_abs(dev, ABS_Y, y1);
522 }
523 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
524 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
525 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
526 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
cd9e83e2
HG		 527
528 /* For clickpads map both buttons to BTN_LEFT */
529 if (etd->fw_version & 0x001000) {
530 input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
531 } else {
532 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
533 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
534 }
535
28f49616
JD		 536 input_report_abs(dev, ABS_PRESSURE, pres);
537 input_report_abs(dev, ABS_TOOL_WIDTH, width);
538
539 input_sync(dev);
540}
541
1dc6edec
JD		 542static void elantech_input_sync_v4(struct psmouse *psmouse)
543{
544 struct input_dev *dev = psmouse->dev;
cd9e83e2 545 struct elantech_data *etd = psmouse->private;
1dc6edec
JD		 546 unsigned char *packet = psmouse->packet;
547
cd9e83e2
HG		 548 /* For clickpads map both buttons to BTN_LEFT */
549 if (etd->fw_version & 0x001000) {
550 input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
551 } else {
552 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
553 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
f386474e 554 input_report_key(dev, BTN_MIDDLE, packet[0] & 0x04);
cd9e83e2
HG		 555 }
556
1dc6edec
JD		 557 input_mt_report_pointer_emulation(dev, true);
558 input_sync(dev);
559}
560
561static void process_packet_status_v4(struct psmouse *psmouse)
562{
563 struct input_dev *dev = psmouse->dev;
564 unsigned char *packet = psmouse->packet;
565 unsigned fingers;
566 int i;
567
568 /* notify finger state change */
569 fingers = packet[1] & 0x1f;
570 for (i = 0; i < ETP_MAX_FINGERS; i++) {
571 if ((fingers & (1 << i)) == 0) {
572 input_mt_slot(dev, i);
573 input_mt_report_slot_state(dev, MT_TOOL_FINGER, false);
574 }
575 }
576
577 elantech_input_sync_v4(psmouse);
578}
579
580static void process_packet_head_v4(struct psmouse *psmouse)
581{
582 struct input_dev *dev = psmouse->dev;
583 struct elantech_data *etd = psmouse->private;
584 unsigned char *packet = psmouse->packet;
585 int id = ((packet[3] & 0xe0) >> 5) - 1;
586 int pres, traces;
587
588 if (id < 0)
589 return;
590
591 etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2];
592 etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
593 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
594 traces = (packet[0] & 0xf0) >> 4;
595
596 input_mt_slot(dev, id);
597 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
598
599 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
600 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
601 input_report_abs(dev, ABS_MT_PRESSURE, pres);
602 input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width);
603 /* report this for backwards compatibility */
604 input_report_abs(dev, ABS_TOOL_WIDTH, traces);
605
606 elantech_input_sync_v4(psmouse);
607}
608
609static void process_packet_motion_v4(struct psmouse *psmouse)
610{
611 struct input_dev *dev = psmouse->dev;
612 struct elantech_data *etd = psmouse->private;
613 unsigned char *packet = psmouse->packet;
614 int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0;
615 int id, sid;
616
617 id = ((packet[0] & 0xe0) >> 5) - 1;
618 if (id < 0)
619 return;
620
621 sid = ((packet[3] & 0xe0) >> 5) - 1;
622 weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1;
623 /*
624 * Motion packets give us the delta of x, y values of specific fingers,
625 * but in two's complement. Let the compiler do the conversion for us.
626 * Also _enlarge_ the numbers to int, in case of overflow.
627 */
628 delta_x1 = (signed char)packet[1];
629 delta_y1 = (signed char)packet[2];
630 delta_x2 = (signed char)packet[4];
631 delta_y2 = (signed char)packet[5];
632
633 etd->mt[id].x += delta_x1 * weight;
634 etd->mt[id].y -= delta_y1 * weight;
635 input_mt_slot(dev, id);
636 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
637 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
638
639 if (sid >= 0) {
640 etd->mt[sid].x += delta_x2 * weight;
641 etd->mt[sid].y -= delta_y2 * weight;
642 input_mt_slot(dev, sid);
643 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x);
644 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y);
645 }
646
647 elantech_input_sync_v4(psmouse);
648}
649
650static void elantech_report_absolute_v4(struct psmouse *psmouse,
651 int packet_type)
652{
653 switch (packet_type) {
654 case PACKET_V4_STATUS:
655 process_packet_status_v4(psmouse);
656 break;
657
658 case PACKET_V4_HEAD:
659 process_packet_head_v4(psmouse);
660 break;
661
662 case PACKET_V4_MOTION:
663 process_packet_motion_v4(psmouse);
664 break;
665
666 case PACKET_UNKNOWN:
667 default:
668 /* impossible to get here */
669 break;
670 }
671}
672
7894f21b 673static int elantech_packet_check_v1(struct psmouse *psmouse)
2a0bd75e
AO		 674{
675 struct elantech_data *etd = psmouse->private;
676 unsigned char *packet = psmouse->packet;
677 unsigned char p1, p2, p3;
678
679 /* Parity bits are placed differently */
504e8bee 680 if (etd->fw_version < 0x020000) {
2a0bd75e
AO		 681 /* byte 0: D U p1 p2 1 p3 R L */
682 p1 = (packet[0] & 0x20) >> 5;
683 p2 = (packet[0] & 0x10) >> 4;
684 } else {
685 /* byte 0: n1 n0 p2 p1 1 p3 R L */
686 p1 = (packet[0] & 0x10) >> 4;
687 p2 = (packet[0] & 0x20) >> 5;
688 }
689
690 p3 = (packet[0] & 0x04) >> 2;
691
692 return etd->parity[packet[1]] == p1 &&
693 etd->parity[packet[2]] == p2 &&
694 etd->parity[packet[3]] == p3;
695}
696
84a90b61
JD		 697static int elantech_debounce_check_v2(struct psmouse *psmouse)
698{
699 /*
700 * When we encounter packet that matches this exactly, it means the
701 * hardware is in debounce status. Just ignore the whole packet.
702 */
4f1b461d
CIK		 703 static const u8 debounce_packet[] = {
704 0x84, 0xff, 0xff, 0x02, 0xff, 0xff
705 };
84a90b61
JD		 706 unsigned char *packet = psmouse->packet;
707
708 return !memcmp(packet, debounce_packet, sizeof(debounce_packet));
709}
710
7894f21b
JD		 711static int elantech_packet_check_v2(struct psmouse *psmouse)
712{
713 struct elantech_data *etd = psmouse->private;
714 unsigned char *packet = psmouse->packet;
715
716 /*
717 * V2 hardware has two flavors. Older ones that do not report pressure,
718 * and newer ones that reports pressure and width. With newer ones, all
719 * packets (1, 2, 3 finger touch) have the same constant bits. With
720 * older ones, 1/3 finger touch packets and 2 finger touch packets
721 * have different constant bits.
722 * With all three cases, if the constant bits are not exactly what I
723 * expected, I consider them invalid.
724 */
725 if (etd->reports_pressure)
726 return (packet[0] & 0x0c) == 0x04 &&
727 (packet[3] & 0x0f) == 0x02;
728
729 if ((packet[0] & 0xc0) == 0x80)
730 return (packet[0] & 0x0c) == 0x0c &&
731 (packet[3] & 0x0e) == 0x08;
732
733 return (packet[0] & 0x3c) == 0x3c &&
734 (packet[1] & 0xf0) == 0x00 &&
735 (packet[3] & 0x3e) == 0x38 &&
736 (packet[4] & 0xf0) == 0x00;
737}
738
28f49616
JD		 739/*
740 * We check the constant bits to determine what packet type we get,
1dc6edec 741 * so packet checking is mandatory for v3 and later hardware.
28f49616
JD		 742 */
743static int elantech_packet_check_v3(struct psmouse *psmouse)
744{
acc0444b 745 struct elantech_data *etd = psmouse->private;
4f1b461d
CIK		 746 static const u8 debounce_packet[] = {
747 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff
748 };
28f49616
JD		 749 unsigned char *packet = psmouse->packet;
750
751 /*
752 * check debounce first, it has the same signature in byte 0
753 * and byte 3 as PACKET_V3_HEAD.
754 */
755 if (!memcmp(packet, debounce_packet, sizeof(debounce_packet)))
756 return PACKET_DEBOUNCE;
757
acc0444b
MD		 758 /*
759 * If the hardware flag 'crc_enabled' is set the packets have
760 * different signatures.
761 */
762 if (etd->crc_enabled) {
763 if ((packet[3] & 0x09) == 0x08)
764 return PACKET_V3_HEAD;
765
766 if ((packet[3] & 0x09) == 0x09)
767 return PACKET_V3_TAIL;
768 } else {
769 if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02)
770 return PACKET_V3_HEAD;
28f49616 771
acc0444b
MD		 772 if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c)
773 return PACKET_V3_TAIL;
a2418fc4
UDB		 774 if ((packet[3] & 0x0f) == 0x06)
775 return PACKET_TRACKPOINT;
acc0444b 776 }
28f49616
JD		 777
778 return PACKET_UNKNOWN;
779}
780
1dc6edec
JD		 781static int elantech_packet_check_v4(struct psmouse *psmouse)
782{
acc0444b 783 struct elantech_data *etd = psmouse->private;
1dc6edec 784 unsigned char *packet = psmouse->packet;
9eebed7d 785 unsigned char packet_type = packet[3] & 0x03;
6b30c73e 786 unsigned int ic_version;
acc0444b
MD		 787 bool sanity_check;
788
d0ab5478 789 if (etd->tp_dev && (packet[3] & 0x0f) == 0x06)
caeb0d37
UDB		 790 return PACKET_TRACKPOINT;
791
6b30c73e
DL		 792 /* This represents the version of IC body. */
793 ic_version = (etd->fw_version & 0x0f0000) >> 16;
794
acc0444b
MD		 795 /*
796 * Sanity check based on the constant bits of a packet.
797 * The constant bits change depending on the value of
6b30c73e
DL		 798 * the hardware flag 'crc_enabled' and the version of
799 * the IC body, but are the same for every packet,
800 * regardless of the type.
acc0444b
MD		 801 */
802 if (etd->crc_enabled)
803 sanity_check = ((packet[3] & 0x08) == 0x00);
6b30c73e
DL		 804 else if (ic_version == 7 && etd->samples[1] == 0x2A)
805 sanity_check = ((packet[3] & 0x1c) == 0x10);
acc0444b
MD		 806 else
807 sanity_check = ((packet[0] & 0x0c) == 0x04 &&
808 (packet[3] & 0x1c) == 0x10);
809
810 if (!sanity_check)
811 return PACKET_UNKNOWN;
1dc6edec 812
9eebed7d
MD		 813 switch (packet_type) {
814 case 0:
815 return PACKET_V4_STATUS;
816
817 case 1:
1dc6edec
JD		 818 return PACKET_V4_HEAD;
819
9eebed7d 820 case 2:
1dc6edec 821 return PACKET_V4_MOTION;
9eebed7d 822 }
1dc6edec
JD		 823
824 return PACKET_UNKNOWN;
825}
826
2a0bd75e
AO		 827/*
828 * Process byte stream from mouse and handle complete packets
829 */
830static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
831{
832 struct elantech_data *etd = psmouse->private;
28f49616 833 int packet_type;
2a0bd75e
AO		 834
835 if (psmouse->pktcnt < psmouse->pktsize)
836 return PSMOUSE_GOOD_DATA;
837
838 if (etd->debug > 1)
b5d21704 839 elantech_packet_dump(psmouse);
2a0bd75e
AO		 840
841 switch (etd->hw_version) {
842 case 1:
7894f21b 843 if (etd->paritycheck && !elantech_packet_check_v1(psmouse))
2a0bd75e
AO		 844 return PSMOUSE_BAD_DATA;
845
846 elantech_report_absolute_v1(psmouse);
847 break;
848
849 case 2:
84a90b61
JD		 850 /* ignore debounce */
851 if (elantech_debounce_check_v2(psmouse))
852 return PSMOUSE_FULL_PACKET;
853
7894f21b
JD		 854 if (etd->paritycheck && !elantech_packet_check_v2(psmouse))
855 return PSMOUSE_BAD_DATA;
856
2a0bd75e
AO		 857 elantech_report_absolute_v2(psmouse);
858 break;
28f49616
JD		 859
860 case 3:
861 packet_type = elantech_packet_check_v3(psmouse);
a2418fc4
UDB		 862 switch (packet_type) {
863 case PACKET_UNKNOWN:
28f49616
JD		 864 return PSMOUSE_BAD_DATA;
865
a2418fc4
UDB		 866 case PACKET_DEBOUNCE:
867 /* ignore debounce */
868 break;
869
870 case PACKET_TRACKPOINT:
871 elantech_report_trackpoint(psmouse, packet_type);
872 break;
873
874 default:
875 elantech_report_absolute_v3(psmouse, packet_type);
876 break;
877 }
878
28f49616 879 break;
1dc6edec
JD		 880
881 case 4:
882 packet_type = elantech_packet_check_v4(psmouse);
caeb0d37
UDB		 883 switch (packet_type) {
884 case PACKET_UNKNOWN:
1dc6edec
JD		 885 return PSMOUSE_BAD_DATA;
886
caeb0d37
UDB		 887 case PACKET_TRACKPOINT:
888 elantech_report_trackpoint(psmouse, packet_type);
889 break;
890
891 default:
892 elantech_report_absolute_v4(psmouse, packet_type);
893 break;
894 }
895
1dc6edec 896 break;
2a0bd75e
AO		 897 }
898
899 return PSMOUSE_FULL_PACKET;
900}
901
bd884149
UDB		 902/*
903 * This writes the reg_07 value again to the hardware at the end of every
904 * set_rate call because the register loses its value. reg_07 allows setting
905 * absolute mode on v4 hardware
906 */
907static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse,
908 unsigned int rate)
909{
910 struct elantech_data *etd = psmouse->private;
911
912 etd->original_set_rate(psmouse, rate);
913 if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
914 psmouse_err(psmouse, "restoring reg_07 failed\n");
915}
916
2a0bd75e
AO		 917/*
918 * Put the touchpad into absolute mode
919 */
920static int elantech_set_absolute_mode(struct psmouse *psmouse)
921{
922 struct elantech_data *etd = psmouse->private;
923 unsigned char val;
924 int tries = ETP_READ_BACK_TRIES;
925 int rc = 0;
926
927 switch (etd->hw_version) {
928 case 1:
929 etd->reg_10 = 0x16;
930 etd->reg_11 = 0x8f;
931 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
932 elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
933 rc = -1;
934 }
935 break;
936
937 case 2:
938 /* Windows driver values */
939 etd->reg_10 = 0x54;
940 etd->reg_11 = 0x88; /* 0x8a */
941 etd->reg_21 = 0x60; /* 0x00 */
942 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
943 elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
944 elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
945 rc = -1;
2a0bd75e 946 }
28f49616
JD		 947 break;
948
949 case 3:
36189cc3
HG		 950 if (etd->set_hw_resolution)
951 etd->reg_10 = 0x0b;
952 else
fb4f8f56 953 etd->reg_10 = 0x01;
36189cc3 954
28f49616
JD		 955 if (elantech_write_reg(psmouse, 0x10, etd->reg_10))
956 rc = -1;
957
958 break;
1dc6edec
JD		 959
960 case 4:
961 etd->reg_07 = 0x01;
962 if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
963 rc = -1;
964
965 goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */
b2546df6
AO		 966 }
967
968 if (rc == 0) {
2a0bd75e 969 /*
b2546df6
AO		 970 * Read back reg 0x10. For hardware version 1 we must make
971 * sure the absolute mode bit is set. For hardware version 2
b5d21704 972 * the touchpad is probably initializing and not ready until
b2546df6 973 * we read back the value we just wrote.
2a0bd75e
AO		 974 */
975 do {
976 rc = elantech_read_reg(psmouse, 0x10, &val);
977 if (rc == 0)
978 break;
979 tries--;
d4ae84a8 980 elantech_debug("retrying read (%d).\n", tries);
2a0bd75e
AO		 981 msleep(ETP_READ_BACK_DELAY);
982 } while (tries > 0);
b2546df6
AO		 983
984 if (rc) {
b5d21704
DT		 985 psmouse_err(psmouse,
986 "failed to read back register 0x10.\n");
b2546df6
AO		 987 } else if (etd->hw_version == 1 &&
988 !(val & ETP_R10_ABSOLUTE_MODE)) {
b5d21704
DT		 989 psmouse_err(psmouse,
990 "touchpad refuses to switch to absolute mode.\n");
b2546df6
AO		 991 rc = -1;
992 }
2a0bd75e
AO		 993 }
994
1dc6edec 995 skip_readback_reg_10:
2a0bd75e 996 if (rc)
b5d21704 997 psmouse_err(psmouse, "failed to initialise registers.\n");
2a0bd75e
AO		 998
999 return rc;
1000}
1001
28f49616
JD		 1002static int elantech_set_range(struct psmouse *psmouse,
1003 unsigned int *x_min, unsigned int *y_min,
1dc6edec
JD		 1004 unsigned int *x_max, unsigned int *y_max,
1005 unsigned int *width)
230282a7
JD		 1006{
1007 struct elantech_data *etd = psmouse->private;
28f49616 1008 unsigned char param[3];
1dc6edec 1009 unsigned char traces;
230282a7
JD		 1010
1011 switch (etd->hw_version) {
1012 case 1:
1013 *x_min = ETP_XMIN_V1;
1014 *y_min = ETP_YMIN_V1;
1015 *x_max = ETP_XMAX_V1;
1016 *y_max = ETP_YMAX_V1;
1017 break;
1018
1019 case 2:
1020 if (etd->fw_version == 0x020800 ||
1021 etd->fw_version == 0x020b00 ||
1022 etd->fw_version == 0x020030) {
1023 *x_min = ETP_XMIN_V2;
1024 *y_min = ETP_YMIN_V2;
1025 *x_max = ETP_XMAX_V2;
1026 *y_max = ETP_YMAX_V2;
1027 } else {
84a90b61
JD		 1028 int i;
1029 int fixed_dpi;
1030
230282a7
JD		 1031 i = (etd->fw_version > 0x020800 &&
1032 etd->fw_version < 0x020900) ? 1 : 2;
84a90b61 1033
b56b92a9 1034 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
84a90b61
JD		 1035 return -1;
1036
1037 fixed_dpi = param[1] & 0x10;
1038
1039 if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
b56b92a9 1040 if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
84a90b61
JD		 1041 return -1;
1042
1043 *x_max = (etd->capabilities[1] - i) * param[1] / 2;
1044 *y_max = (etd->capabilities[2] - i) * param[2] / 2;
1045 } else if (etd->fw_version == 0x040216) {
1046 *x_max = 819;
1047 *y_max = 405;
1048 } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) {
1049 *x_max = 900;
1050 *y_max = 500;
1051 } else {
1052 *x_max = (etd->capabilities[1] - i) * 64;
1053 *y_max = (etd->capabilities[2] - i) * 64;
1054 }
230282a7
JD		 1055 }
1056 break;
28f49616
JD		 1057
1058 case 3:
b56b92a9 1059 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
28f49616
JD		 1060 return -1;
1061
1062 *x_max = (0x0f & param[0]) << 8 | param[1];
1063 *y_max = (0xf0 & param[0]) << 4 | param[2];
1064 break;
1dc6edec
JD		 1065
1066 case 4:
b56b92a9 1067 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
1dc6edec
JD		 1068 return -1;
1069
1070 *x_max = (0x0f & param[0]) << 8 | param[1];
1071 *y_max = (0xf0 & param[0]) << 4 | param[2];
1072 traces = etd->capabilities[1];
1073 if ((traces < 2) || (traces > *x_max))
1074 return -1;
1075
1076 *width = *x_max / (traces - 1);
1077 break;
230282a7 1078 }
28f49616
JD		 1079
1080 return 0;
230282a7
JD		 1081}
1082
3d95fd6a
JD		 1083/*
1084 * (value from firmware) * 10 + 790 = dpi
1085 * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
1086 */
1087static unsigned int elantech_convert_res(unsigned int val)
1088{
1089 return (val * 10 + 790) * 10 / 254;
1090}
1091
1092static int elantech_get_resolution_v4(struct psmouse *psmouse,
1093 unsigned int *x_res,
1094 unsigned int *y_res)
1095{
1096 unsigned char param[3];
1097
1098 if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param))
1099 return -1;
1100
1101 *x_res = elantech_convert_res(param[1] & 0x0f);
1102 *y_res = elantech_convert_res((param[1] & 0xf0) >> 4);
1103
1104 return 0;
1105}
1106
c15bdfd5
HG		 1107/*
1108 * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in
1109 * fw_version for this is based on the following fw_version & caps table:
1110 *
1111 * Laptop-model: fw_version: caps: buttons:
1112 * Acer S3 0x461f00 10, 13, 0e clickpad
1113 * Acer S7-392 0x581f01 50, 17, 0d clickpad
1114 * Acer V5-131 0x461f02 01, 16, 0c clickpad
1115 * Acer V5-551 0x461f00 ? clickpad
1116 * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons
1117 * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons
1118 * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons
bd884149
UDB		 1119 * Asus TP500LN 0x381f17 10, 14, 0e clickpad
1120 * Asus X750JN 0x381f17 10, 14, 0e clickpad
c15bdfd5
HG		 1121 * Asus UX31 0x361f00 20, 15, 0e clickpad
1122 * Asus UX32VD 0x361f02 00, 15, 0e clickpad
1123 * Avatar AVIU-145A2 0x361f00 ? clickpad
47c1ffb2 1124 * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons
47eb0c8b 1125 * Fujitsu LIFEBOOK E546 0x470f00 50, 12, 09 2 hw buttons
704de489 1126 * Fujitsu LIFEBOOK E547 0x470f00 50, 12, 09 2 hw buttons
47c1ffb2 1127 * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons
47eb0c8b 1128 * Fujitsu LIFEBOOK E557 0x570f01 40, 14, 0c 2 hw buttons
6b30c73e 1129 * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons
a2418fc4 1130 * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**)
c15bdfd5
HG		 1131 * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons
1132 * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*)
a2418fc4 1133 * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*)
c15bdfd5
HG		 1134 * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons
1135 * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad
1136 * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad
1137 * Samsung NP900X3E-A02 0x575f03 ? clickpad
1138 * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad
1139 * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons
1140 * Samsung RF710 0x450f00 ? 2 hw buttons
1141 * System76 Pangolin 0x250f01 ? 2 hw buttons
1142 * (*) + 3 trackpoint buttons
a2418fc4 1143 * (**) + 0 trackpoint buttons
ad3cce06 1144 * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps
c15bdfd5
HG		 1145 */
1146static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
1147{
1148 struct input_dev *dev = psmouse->dev;
1149 struct elantech_data *etd = psmouse->private;
1150
1151 if (etd->fw_version & 0x001000) {
1152 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1153 __clear_bit(BTN_RIGHT, dev->keybit);
1154 }
1155}
1156
f386474e
UDB		 1157/*
1158 * Some hw_version 4 models do have a middle button
1159 */
1160static const struct dmi_system_id elantech_dmi_has_middle_button[] = {
1161#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1162 {
1163 /* Fujitsu H730 has a middle button */
1164 .matches = {
1165 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1166 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),
1167 },
1168 },
f9a703a5
MK		 1169 {
1170 /* Fujitsu H760 also has a middle button */
1171 .matches = {
1172 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1173 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"),
1174 },
1175 },
f386474e
UDB		 1176#endif
1177 { }
1178};
1179
2a0bd75e
AO		 1180/*
1181 * Set the appropriate event bits for the input subsystem
1182 */
28f49616 1183static int elantech_set_input_params(struct psmouse *psmouse)
2a0bd75e
AO		 1184{
1185 struct input_dev *dev = psmouse->dev;
1186 struct elantech_data *etd = psmouse->private;
1dc6edec 1187 unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
d98399e6 1188 unsigned int x_res = 31, y_res = 31;
230282a7 1189
1dc6edec 1190 if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
28f49616 1191 return -1;
2a0bd75e 1192
e3dde4fb 1193 __set_bit(INPUT_PROP_POINTER, dev->propbit);
2a0bd75e
AO		 1194 __set_bit(EV_KEY, dev->evbit);
1195 __set_bit(EV_ABS, dev->evbit);
c7a1f3cc 1196 __clear_bit(EV_REL, dev->evbit);
2a0bd75e
AO		 1197
1198 __set_bit(BTN_LEFT, dev->keybit);
f386474e
UDB		 1199 if (dmi_check_system(elantech_dmi_has_middle_button))
1200 __set_bit(BTN_MIDDLE, dev->keybit);
2a0bd75e
AO		 1201 __set_bit(BTN_RIGHT, dev->keybit);
1202
1203 __set_bit(BTN_TOUCH, dev->keybit);
1204 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1205 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1206 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1207
1208 switch (etd->hw_version) {
1209 case 1:
1210 /* Rocker button */
504e8bee 1211 if (etd->fw_version < 0x020000 &&
230282a7 1212 (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
2a0bd75e
AO		 1213 __set_bit(BTN_FORWARD, dev->keybit);
1214 __set_bit(BTN_BACK, dev->keybit);
1215 }
230282a7
JD		 1216 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1217 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
2a0bd75e
AO		 1218 break;
1219
1220 case 2:
22462d9f 1221 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
28f49616
JD		 1222 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1223 /* fall through */
1224 case 3:
c15bdfd5
HG		 1225 if (etd->hw_version == 3)
1226 elantech_set_buttonpad_prop(psmouse);
230282a7
JD		 1227 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1228 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
f941c705
ÉP		 1229 if (etd->reports_pressure) {
1230 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1231 ETP_PMAX_V2, 0, 0);
1232 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1233 ETP_WMAX_V2, 0, 0);
1234 }
6544a1df 1235 input_mt_init_slots(dev, 2, INPUT_MT_SEMI_MT);
230282a7
JD		 1236 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1237 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
2a0bd75e 1238 break;
1dc6edec
JD		 1239
1240 case 4:
3d95fd6a
JD		 1241 if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) {
1242 /*
1243 * if query failed, print a warning and leave the values
1244 * zero to resemble synaptics.c behavior.
1245 */
1246 psmouse_warn(psmouse, "couldn't query resolution data.\n");
1247 }
c15bdfd5 1248 elantech_set_buttonpad_prop(psmouse);
1dc6edec
JD		 1249 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1250 /* For X to recognize me as touchpad. */
1251 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1252 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
1253 /*
1254 * range of pressure and width is the same as v2,
1255 * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
1256 */
1257 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1258 ETP_PMAX_V2, 0, 0);
1259 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1260 ETP_WMAX_V2, 0, 0);
1261 /* Multitouch capable pad, up to 5 fingers. */
b4adbbef 1262 input_mt_init_slots(dev, ETP_MAX_FINGERS, 0);
1dc6edec
JD		 1263 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1264 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
1265 input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2,
1266 ETP_PMAX_V2, 0, 0);
1267 /*
1268 * The firmware reports how many trace lines the finger spans,
1269 * convert to surface unit as Protocol-B requires.
1270 */
1271 input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0,
1272 ETP_WMAX_V2 * width, 0, 0);
1273 break;
2a0bd75e 1274 }
230282a7 1275
d98399e6
PH		 1276 input_abs_set_res(dev, ABS_X, x_res);
1277 input_abs_set_res(dev, ABS_Y, y_res);
1278 if (etd->hw_version > 1) {
1279 input_abs_set_res(dev, ABS_MT_POSITION_X, x_res);
1280 input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res);
1281 }
1282
230282a7 1283 etd->y_max = y_max;
1dc6edec 1284 etd->width = width;
28f49616
JD		 1285
1286 return 0;
2a0bd75e
AO		 1287}
1288
1289struct elantech_attr_data {
1290 size_t field_offset;
1291 unsigned char reg;
1292};
1293
1294/*
1295 * Display a register value by reading a sysfs entry
1296 */
1297static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
1298 char *buf)
1299{
1300 struct elantech_data *etd = psmouse->private;
1301 struct elantech_attr_data *attr = data;
1302 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
1303 int rc = 0;
1304
1305 if (attr->reg)
1306 rc = elantech_read_reg(psmouse, attr->reg, reg);
1307
1308 return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
1309}
1310
1311/*
1312 * Write a register value by writing a sysfs entry
1313 */
1314static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
1315 void *data, const char *buf, size_t count)
1316{
1317 struct elantech_data *etd = psmouse->private;
1318 struct elantech_attr_data *attr = data;
1319 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
76496e7a 1320 unsigned char value;
2a0bd75e
AO		 1321 int err;
1322
76496e7a 1323 err = kstrtou8(buf, 16, &value);
2a0bd75e
AO		 1324 if (err)
1325 return err;
1326
2a0bd75e
AO		 1327 /* Do we need to preserve some bits for version 2 hardware too? */
1328 if (etd->hw_version == 1) {
1329 if (attr->reg == 0x10)
1330 /* Force absolute mode always on */
1331 value |= ETP_R10_ABSOLUTE_MODE;
1332 else if (attr->reg == 0x11)
1333 /* Force 4 byte mode always on */
1334 value |= ETP_R11_4_BYTE_MODE;
1335 }
1336
1337 if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
1338 *reg = value;
1339
1340 return count;
1341}
1342
1343#define ELANTECH_INT_ATTR(_name, _register) \
1344 static struct elantech_attr_data elantech_attr_##_name = { \
1345 .field_offset = offsetof(struct elantech_data, _name), \
1346 .reg = _register, \
1347 }; \
1348 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
1349 &elantech_attr_##_name, \
1350 elantech_show_int_attr, \
1351 elantech_set_int_attr)
1352
1dc6edec 1353ELANTECH_INT_ATTR(reg_07, 0x07);
2a0bd75e
AO		 1354ELANTECH_INT_ATTR(reg_10, 0x10);
1355ELANTECH_INT_ATTR(reg_11, 0x11);
1356ELANTECH_INT_ATTR(reg_20, 0x20);
1357ELANTECH_INT_ATTR(reg_21, 0x21);
1358ELANTECH_INT_ATTR(reg_22, 0x22);
1359ELANTECH_INT_ATTR(reg_23, 0x23);
1360ELANTECH_INT_ATTR(reg_24, 0x24);
1361ELANTECH_INT_ATTR(reg_25, 0x25);
1362ELANTECH_INT_ATTR(reg_26, 0x26);
1363ELANTECH_INT_ATTR(debug, 0);
1364ELANTECH_INT_ATTR(paritycheck, 0);
2d9eb81f 1365ELANTECH_INT_ATTR(crc_enabled, 0);
2a0bd75e
AO		 1366
1367static struct attribute *elantech_attrs[] = {
1dc6edec 1368 &psmouse_attr_reg_07.dattr.attr,
2a0bd75e
AO		 1369 &psmouse_attr_reg_10.dattr.attr,
1370 &psmouse_attr_reg_11.dattr.attr,
1371 &psmouse_attr_reg_20.dattr.attr,
1372 &psmouse_attr_reg_21.dattr.attr,
1373 &psmouse_attr_reg_22.dattr.attr,
1374 &psmouse_attr_reg_23.dattr.attr,
1375 &psmouse_attr_reg_24.dattr.attr,
1376 &psmouse_attr_reg_25.dattr.attr,
1377 &psmouse_attr_reg_26.dattr.attr,
1378 &psmouse_attr_debug.dattr.attr,
1379 &psmouse_attr_paritycheck.dattr.attr,
2d9eb81f 1380 &psmouse_attr_crc_enabled.dattr.attr,
2a0bd75e
AO		 1381 NULL
1382};
1383
57999433 1384static const struct attribute_group elantech_attr_group = {
2a0bd75e
AO		 1385 .attrs = elantech_attrs,
1386};
1387
a083632e
DT		 1388static bool elantech_is_signature_valid(const unsigned char *param)
1389{
1390 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 };
1391 int i;
1392
1393 if (param[0] == 0)
1394 return false;
1395
1396 if (param[1] == 0)
1397 return true;
1398
271329b3 1399 /*
5f0ee9d1
HG		 1400 * Some hw_version >= 4 models have a revision higher then 20. Meaning
1401 * that param[2] may be 10 or 20, skip the rates check for these.
271329b3 1402 */
5f0ee9d1
HG		 1403 if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f &&
1404 param[2] < 40)
271329b3
HG		 1405 return true;
1406
a083632e
DT		 1407 for (i = 0; i < ARRAY_SIZE(rates); i++)
1408 if (param[2] == rates[i])
1409 return false;
1410
1411 return true;
1412}
1413
2a0bd75e
AO		 1414/*
1415 * Use magic knock to detect Elantech touchpad
1416 */
b7802c5c 1417int elantech_detect(struct psmouse *psmouse, bool set_properties)
2a0bd75e
AO		 1418{
1419 struct ps2dev *ps2dev = &psmouse->ps2dev;
1420 unsigned char param[3];
1421
ad56814f 1422 ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
2a0bd75e
AO		 1423
1424 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1425 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1426 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1427 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1428 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
b5d21704 1429 psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n");
2a0bd75e
AO		 1430 return -1;
1431 }
1432
1433 /*
1434 * Report this in case there are Elantech models that use a different
1435 * set of magic numbers
1436 */
28f49616
JD		 1437 if (param[0] != 0x3c || param[1] != 0x03 ||
1438 (param[2] != 0xc8 && param[2] != 0x00)) {
b5d21704
DT		 1439 psmouse_dbg(psmouse,
1440 "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
1441 param[0], param[1], param[2]);
9ab7b25e
AO		 1442 return -1;
1443 }
1444
1445 /*
1446 * Query touchpad's firmware version and see if it reports known
1447 * value to avoid mis-detection. Logitech mice are known to respond
1448 * to Elantech magic knock and there might be more.
1449 */
1450 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1451 psmouse_dbg(psmouse, "failed to query firmware version.\n");
9ab7b25e
AO		 1452 return -1;
1453 }
1454
b5d21704
DT		 1455 psmouse_dbg(psmouse,
1456 "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
1457 param[0], param[1], param[2]);
9ab7b25e 1458
a083632e 1459 if (!elantech_is_signature_valid(param)) {
b5d21704
DT		 1460 psmouse_dbg(psmouse,
1461 "Probably not a real Elantech touchpad. Aborting.\n");
4af61e90 1462 return -1;
2a0bd75e
AO		 1463 }
1464
1465 if (set_properties) {
1466 psmouse->vendor = "Elantech";
1467 psmouse->name = "Touchpad";
1468 }
1469
1470 return 0;
1471}
1472
1473/*
1474 * Clean up sysfs entries when disconnecting
1475 */
1476static void elantech_disconnect(struct psmouse *psmouse)
1477{
a2418fc4
UDB		 1478 struct elantech_data *etd = psmouse->private;
1479
1480 if (etd->tp_dev)
1481 input_unregister_device(etd->tp_dev);
2a0bd75e
AO		 1482 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1483 &elantech_attr_group);
1484 kfree(psmouse->private);
1485 psmouse->private = NULL;
1486}
1487
1488/*
1489 * Put the touchpad back into absolute mode when reconnecting
1490 */
1491static int elantech_reconnect(struct psmouse *psmouse)
1492{
a67ada7a
JD		 1493 psmouse_reset(psmouse);
1494
2a0bd75e
AO		 1495 if (elantech_detect(psmouse, 0))
1496 return -1;
1497
1498 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1499 psmouse_err(psmouse,
1500 "failed to put touchpad back into absolute mode.\n");
2a0bd75e
AO		 1501 return -1;
1502 }
1503
1504 return 0;
1505}
1506
0dc15879
UDB		 1507/*
1508 * Some hw_version 4 models do not work with crc_disabled
1509 */
1510static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = {
1511#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1512 {
1513 /* Fujitsu H730 does not work with crc_enabled == 0 */
1514 .matches = {
1515 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1516 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),
1517 },
1518 },
f9a703a5
MK		 1519 {
1520 /* Fujitsu H760 does not work with crc_enabled == 0 */
1521 .matches = {
1522 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1523 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"),
1524 },
1525 },
62837b3c
DT		 1526 {
1527 /* Fujitsu LIFEBOOK E544 does not work with crc_enabled == 0 */
1528 .matches = {
1529 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1530 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544"),
1531 },
1532 },
47eb0c8b
UDB		 1533 {
1534 /* Fujitsu LIFEBOOK E546 does not work with crc_enabled == 0 */
1535 .matches = {
1536 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1537 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E546"),
1538 },
1539 },
704de489
TL		 1540 {
1541 /* Fujitsu LIFEBOOK E547 does not work with crc_enabled == 0 */
1542 .matches = {
1543 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1544 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E547"),
1545 },
1546 },
47c1ffb2
RK		 1547 {
1548 /* Fujitsu LIFEBOOK E554 does not work with crc_enabled == 0 */
1549 .matches = {
1550 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1551 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E554"),
1552 },
1553 },
1554 {
62837b3c 1555 /* Fujitsu LIFEBOOK E556 does not work with crc_enabled == 0 */
47c1ffb2
RK		 1556 .matches = {
1557 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
62837b3c 1558 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E556"),
47c1ffb2
RK		 1559 },
1560 },
47eb0c8b
UDB		 1561 {
1562 /* Fujitsu LIFEBOOK E557 does not work with crc_enabled == 0 */
1563 .matches = {
1564 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1565 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E557"),
1566 },
1567 },
60603950
TI		 1568 {
1569 /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */
1570 .matches = {
1571 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1572 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"),
1573 },
1574 },
0dc15879
UDB		 1575#endif
1576 { }
1577};
1578
36189cc3 1579/*
fb4f8f56
HG		 1580 * Some hw_version 3 models go into error state when we try to set
1581 * bit 3 and/or bit 1 of r10.
36189cc3
HG		 1582 */
1583static const struct dmi_system_id no_hw_res_dmi_table[] = {
1584#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1585 {
1586 /* Gigabyte U2442 */
1587 .matches = {
1588 DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
1589 DMI_MATCH(DMI_PRODUCT_NAME, "U2442"),
1590 },
1591 },
1592#endif
1593 { }
1594};
1595
3c8bbb95
JD		 1596/*
1597 * determine hardware version and set some properties according to it.
1598 */
28f49616 1599static int elantech_set_properties(struct elantech_data *etd)
3c8bbb95 1600{
3940d618 1601 /* This represents the version of IC body. */
1dc6edec
JD		 1602 int ver = (etd->fw_version & 0x0f0000) >> 16;
1603
3940d618 1604 /* Early version of Elan touchpads doesn't obey the rule. */
3c8bbb95
JD		 1605 if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
1606 etd->hw_version = 1;
3940d618
JD		 1607 else {
1608 switch (ver) {
1609 case 2:
1610 case 4:
1611 etd->hw_version = 2;
1612 break;
1613 case 5:
1614 etd->hw_version = 3;
1615 break;
10d90030 1616 case 6 ... 15:
3940d618
JD		 1617 etd->hw_version = 4;
1618 break;
1619 default:
1620 return -1;
1621 }
1622 }
3c8bbb95 1623
b56b92a9
JD		 1624 /* decide which send_cmd we're gonna use early */
1625 etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :
1626 synaptics_send_cmd;
1627
1628 /* Turn on packet checking by default */
3c8bbb95
JD		 1629 etd->paritycheck = 1;
1630
1631 /*
1632 * This firmware suffers from misreporting coordinates when
1633 * a touch action starts causing the mouse cursor or scrolled page
1634 * to jump. Enable a workaround.
1635 */
1636 etd->jumpy_cursor =
1637 (etd->fw_version == 0x020022 || etd->fw_version == 0x020600);
1638
28f49616 1639 if (etd->hw_version > 1) {
3c8bbb95
JD		 1640 /* For now show extra debug information */
1641 etd->debug = 1;
1642
1643 if (etd->fw_version >= 0x020800)
1644 etd->reports_pressure = true;
1645 }
28f49616 1646
acc0444b
MD		 1647 /*
1648 * The signatures of v3 and v4 packets change depending on the
1649 * value of this hardware flag.
1650 */
0dc15879
UDB		 1651 etd->crc_enabled = (etd->fw_version & 0x4000) == 0x4000 ||
1652 dmi_check_system(elantech_dmi_force_crc_enabled);
acc0444b 1653
36189cc3
HG		 1654 /* Enable real hardware resolution on hw_version 3 ? */
1655 etd->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);
1656
28f49616 1657 return 0;
3c8bbb95
JD		 1658}
1659
2a0bd75e
AO		 1660/*
1661 * Initialize the touchpad and create sysfs entries
1662 */
1663int elantech_init(struct psmouse *psmouse)
1664{
1665 struct elantech_data *etd;
a2418fc4
UDB		 1666 int i;
1667 int error = -EINVAL;
2a0bd75e 1668 unsigned char param[3];
a2418fc4 1669 struct input_dev *tp_dev;
2a0bd75e 1670
9ab7b25e 1671 psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
2a0bd75e 1672 if (!etd)
6792cbbb 1673 return -ENOMEM;
2a0bd75e 1674
a67ada7a
JD		 1675 psmouse_reset(psmouse);
1676
2a0bd75e
AO		 1677 etd->parity[0] = 1;
1678 for (i = 1; i < 256; i++)
1679 etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
1680
1681 /*
9ab7b25e 1682 * Do the version query again so we can store the result
2a0bd75e
AO		 1683 */
1684 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1685 psmouse_err(psmouse, "failed to query firmware version.\n");
2a0bd75e
AO		 1686 goto init_fail;
1687 }
504e8bee 1688 etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
28f49616
JD		 1689
1690 if (elantech_set_properties(etd)) {
b5d21704 1691 psmouse_err(psmouse, "unknown hardware version, aborting...\n");
28f49616
JD		 1692 goto init_fail;
1693 }
b5d21704
DT		 1694 psmouse_info(psmouse,
1695 "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
1696 etd->hw_version, param[0], param[1], param[2]);
2a0bd75e 1697
b56b92a9 1698 if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
230282a7 1699 etd->capabilities)) {
b5d21704 1700 psmouse_err(psmouse, "failed to query capabilities.\n");
2a0bd75e
AO		 1701 goto init_fail;
1702 }
b5d21704
DT		 1703 psmouse_info(psmouse,
1704 "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
1705 etd->capabilities[0], etd->capabilities[1],
1706 etd->capabilities[2]);
2a0bd75e 1707
6b30c73e
DL		 1708 if (etd->hw_version != 1) {
1709 if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, etd->samples)) {
1710 psmouse_err(psmouse, "failed to query sample data\n");
1711 goto init_fail;
1712 }
1713 psmouse_info(psmouse,
1714 "Elan sample query result %02x, %02x, %02x\n",
1715 etd->samples[0], etd->samples[1], etd->samples[2]);
1716 }
1717
d899520b
KL		 1718 if (etd->samples[1] == 0x74 && etd->hw_version == 0x03) {
1719 /*
1720 * This module has a bug which makes absolute mode
1721 * unusable, so let's abort so we'll be using standard
1722 * PS/2 protocol.
1723 */
1724 psmouse_info(psmouse,
1725 "absolute mode broken, forcing standard PS/2 protocol\n");
1726 goto init_fail;
1727 }
1728
2a0bd75e 1729 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1730 psmouse_err(psmouse,
1731 "failed to put touchpad into absolute mode.\n");
2a0bd75e
AO		 1732 goto init_fail;
1733 }
1734
bd884149
UDB		 1735 if (etd->fw_version == 0x381f17) {
1736 etd->original_set_rate = psmouse->set_rate;
1737 psmouse->set_rate = elantech_set_rate_restore_reg_07;
1738 }
1739
28f49616 1740 if (elantech_set_input_params(psmouse)) {
b5d21704 1741 psmouse_err(psmouse, "failed to query touchpad range.\n");
28f49616
JD		 1742 goto init_fail;
1743 }
2a0bd75e
AO		 1744
1745 error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
1746 &elantech_attr_group);
1747 if (error) {
b5d21704
DT		 1748 psmouse_err(psmouse,
1749 "failed to create sysfs attributes, error: %d.\n",
1750 error);
2a0bd75e
AO		 1751 goto init_fail;
1752 }
1753
a2418fc4
UDB		 1754 /* The MSB indicates the presence of the trackpoint */
1755 if ((etd->capabilities[0] & 0x80) == 0x80) {
1756 tp_dev = input_allocate_device();
1757
1758 if (!tp_dev) {
1759 error = -ENOMEM;
1760 goto init_fail_tp_alloc;
1761 }
1762
1763 etd->tp_dev = tp_dev;
1764 snprintf(etd->tp_phys, sizeof(etd->tp_phys), "%s/input1",
1765 psmouse->ps2dev.serio->phys);
1766 tp_dev->phys = etd->tp_phys;
9096a45d 1767 tp_dev->name = "ETPS/2 Elantech TrackPoint";
a2418fc4
UDB		 1768 tp_dev->id.bustype = BUS_I8042;
1769 tp_dev->id.vendor = 0x0002;
1770 tp_dev->id.product = PSMOUSE_ELANTECH;
1771 tp_dev->id.version = 0x0000;
1772 tp_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1773 tp_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1774 tp_dev->relbit[BIT_WORD(REL_X)] =
1775 BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1776 tp_dev->keybit[BIT_WORD(BTN_LEFT)] =
1777 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) |
1778 BIT_MASK(BTN_RIGHT);
7611392f 1779
01d4cd5c 1780 __set_bit(INPUT_PROP_POINTER, tp_dev->propbit);
7611392f
HG		 1781 __set_bit(INPUT_PROP_POINTING_STICK, tp_dev->propbit);
1782
a2418fc4
UDB		 1783 error = input_register_device(etd->tp_dev);
1784 if (error < 0)
1785 goto init_fail_tp_reg;
1786 }
1787
2a0bd75e
AO		 1788 psmouse->protocol_handler = elantech_process_byte;
1789 psmouse->disconnect = elantech_disconnect;
1790 psmouse->reconnect = elantech_reconnect;
28f49616 1791 psmouse->pktsize = etd->hw_version > 1 ? 6 : 4;
2a0bd75e
AO		 1792
1793 return 0;
a2418fc4
UDB		 1794 init_fail_tp_reg:
1795 input_free_device(tp_dev);
1796 init_fail_tp_alloc:
1797 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1798 &elantech_attr_group);
2a0bd75e 1799 init_fail:
ac84eba2 1800 psmouse_reset(psmouse);
2a0bd75e 1801 kfree(etd);
a2418fc4 1802 return error;
2a0bd75e 1803}
Linux 6.x block layer and io_uring tree(s)