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Input: twl4030-vibra - fix ERROR: Bad of_node_put() warning
[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
AO		 224{
225 int i;
226
b5d21704
DT		 227 psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [");
228 for (i = 0; i < psmouse->pktsize; i++)
229 printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]);
2a0bd75e
AO		 230 printk("]\n");
231}
232
233/*
234 * Interpret complete data packets and report absolute mode input events for
235 * hardware version 1. (4 byte packets)
236 */
237static void elantech_report_absolute_v1(struct psmouse *psmouse)
238{
239 struct input_dev *dev = psmouse->dev;
240 struct elantech_data *etd = psmouse->private;
241 unsigned char *packet = psmouse->packet;
242 int fingers;
243
504e8bee 244 if (etd->fw_version < 0x020000) {
e938fbfd
FR		 245 /*
246 * byte 0: D U p1 p2 1 p3 R L
247 * byte 1: f 0 th tw x9 x8 y9 y8
248 */
2a0bd75e
AO		 249 fingers = ((packet[1] & 0x80) >> 7) +
250 ((packet[1] & 0x30) >> 4);
251 } else {
e938fbfd
FR		 252 /*
253 * byte 0: n1 n0 p2 p1 1 p3 R L
254 * byte 1: 0 0 0 0 x9 x8 y9 y8
255 */
2a0bd75e
AO		 256 fingers = (packet[0] & 0xc0) >> 6;
257 }
258
3f8c0df4 259 if (etd->jumpy_cursor) {
7f29f17b
ÉP		 260 if (fingers != 1) {
261 etd->single_finger_reports = 0;
262 } else if (etd->single_finger_reports < 2) {
263 /* Discard first 2 reports of one finger, bogus */
264 etd->single_finger_reports++;
d4ae84a8 265 elantech_debug("discarding packet\n");
7f29f17b 266 return;
3f8c0df4
AO		 267 }
268 }
269
2a0bd75e
AO		 270 input_report_key(dev, BTN_TOUCH, fingers != 0);
271
e938fbfd
FR		 272 /*
273 * byte 2: x7 x6 x5 x4 x3 x2 x1 x0
274 * byte 3: y7 y6 y5 y4 y3 y2 y1 y0
275 */
2a0bd75e
AO		 276 if (fingers) {
277 input_report_abs(dev, ABS_X,
278 ((packet[1] & 0x0c) << 6) | packet[2]);
e938fbfd 279 input_report_abs(dev, ABS_Y,
230282a7 280 etd->y_max - (((packet[1] & 0x03) << 8) | packet[3]));
2a0bd75e
AO		 281 }
282
283 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
284 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
285 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
286 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
287 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
288
504e8bee 289 if (etd->fw_version < 0x020000 &&
230282a7 290 (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
2a0bd75e
AO		 291 /* rocker up */
292 input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
293 /* rocker down */
294 input_report_key(dev, BTN_BACK, packet[0] & 0x80);
295 }
296
297 input_sync(dev);
298}
299
89eec4d7
ÉP		 300static void elantech_set_slot(struct input_dev *dev, int slot, bool active,
301 unsigned int x, unsigned int y)
302{
303 input_mt_slot(dev, slot);
304 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
305 if (active) {
306 input_report_abs(dev, ABS_MT_POSITION_X, x);
307 input_report_abs(dev, ABS_MT_POSITION_Y, y);
308 }
309}
310
311/* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */
312static void elantech_report_semi_mt_data(struct input_dev *dev,
313 unsigned int num_fingers,
314 unsigned int x1, unsigned int y1,
315 unsigned int x2, unsigned int y2)
316{
317 elantech_set_slot(dev, 0, num_fingers != 0, x1, y1);
3c0213d1 318 elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2);
89eec4d7
ÉP		 319}
320
2a0bd75e
AO		 321/*
322 * Interpret complete data packets and report absolute mode input events for
323 * hardware version 2. (6 byte packets)
324 */
325static void elantech_report_absolute_v2(struct psmouse *psmouse)
326{
f941c705 327 struct elantech_data *etd = psmouse->private;
2a0bd75e
AO		 328 struct input_dev *dev = psmouse->dev;
329 unsigned char *packet = psmouse->packet;
461a7917
JD		 330 unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
331 unsigned int width = 0, pres = 0;
2a0bd75e
AO		 332
333 /* byte 0: n1 n0 . . . . R L */
334 fingers = (packet[0] & 0xc0) >> 6;
2a0bd75e
AO		 335
336 switch (fingers) {
22462d9f
ÉP		 337 case 3:
338 /*
339 * Same as one finger, except report of more than 3 fingers:
340 * byte 3: n4 . w1 w0 . . . .
341 */
342 if (packet[3] & 0x80)
343 fingers = 4;
344 /* pass through... */
2a0bd75e 345 case 1:
e938fbfd 346 /*
11559619 347 * byte 1: . . . . x11 x10 x9 x8
e938fbfd
FR		 348 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
349 */
11559619 350 x1 = ((packet[1] & 0x0f) << 8) | packet[2];
e938fbfd 351 /*
11559619 352 * byte 4: . . . . y11 y10 y9 y8
e938fbfd
FR		 353 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
354 */
230282a7 355 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
89eec4d7 356
f941c705
ÉP		 357 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
358 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
2a0bd75e
AO		 359 break;
360
361 case 2:
e938fbfd
FR		 362 /*
363 * The coordinate of each finger is reported separately
364 * with a lower resolution for two finger touches:
365 * byte 0: . . ay8 ax8 . . . .
366 * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
367 */
461a7917 368 x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2;
2a0bd75e 369 /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
230282a7 370 y1 = etd->y_max -
461a7917 371 ((((packet[0] & 0x20) << 3) | packet[2]) << 2);
e938fbfd
FR		 372 /*
373 * byte 3: . . by8 bx8 . . . .
374 * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0
375 */
461a7917 376 x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2;
2a0bd75e 377 /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
230282a7 378 y2 = etd->y_max -
461a7917 379 ((((packet[3] & 0x20) << 3) | packet[5]) << 2);
f941c705
ÉP		 380
381 /* Unknown so just report sensible values */
382 pres = 127;
383 width = 7;
2a0bd75e
AO		 384 break;
385 }
386
461a7917
JD		 387 input_report_key(dev, BTN_TOUCH, fingers != 0);
388 if (fingers != 0) {
389 input_report_abs(dev, ABS_X, x1);
390 input_report_abs(dev, ABS_Y, y1);
391 }
89eec4d7 392 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
2a0bd75e
AO		 393 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
394 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
395 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
22462d9f 396 input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4);
2a0bd75e
AO		 397 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
398 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
f941c705
ÉP		 399 if (etd->reports_pressure) {
400 input_report_abs(dev, ABS_PRESSURE, pres);
401 input_report_abs(dev, ABS_TOOL_WIDTH, width);
402 }
2a0bd75e
AO		 403
404 input_sync(dev);
405}
406
a2418fc4
UDB		 407static void elantech_report_trackpoint(struct psmouse *psmouse,
408 int packet_type)
409{
410 /*
411 * byte 0: 0 0 sx sy 0 M R L
412 * byte 1:~sx 0 0 0 0 0 0 0
413 * byte 2:~sy 0 0 0 0 0 0 0
414 * byte 3: 0 0 ~sy ~sx 0 1 1 0
415 * byte 4: x7 x6 x5 x4 x3 x2 x1 x0
416 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
417 *
418 * x and y are written in two's complement spread
419 * over 9 bits with sx/sy the relative top bit and
420 * x7..x0 and y7..y0 the lower bits.
421 * The sign of y is opposite to what the input driver
422 * expects for a relative movement
423 */
424
425 struct elantech_data *etd = psmouse->private;
426 struct input_dev *tp_dev = etd->tp_dev;
427 unsigned char *packet = psmouse->packet;
428 int x, y;
429 u32 t;
430
a2418fc4
UDB		 431 t = get_unaligned_le32(&packet[0]);
432
433 switch (t & ~7U) {
434 case 0x06000030U:
435 case 0x16008020U:
436 case 0x26800010U:
437 case 0x36808000U:
438 x = packet[4] - (int)((packet[1]^0x80) << 1);
439 y = (int)((packet[2]^0x80) << 1) - packet[5];
440
441 input_report_key(tp_dev, BTN_LEFT, packet[0] & 0x01);
442 input_report_key(tp_dev, BTN_RIGHT, packet[0] & 0x02);
443 input_report_key(tp_dev, BTN_MIDDLE, packet[0] & 0x04);
444
445 input_report_rel(tp_dev, REL_X, x);
446 input_report_rel(tp_dev, REL_Y, y);
447
448 input_sync(tp_dev);
449
450 break;
451
452 default:
453 /* Dump unexpected packet sequences if debug=1 (default) */
454 if (etd->debug == 1)
455 elantech_packet_dump(psmouse);
456
457 break;
458 }
459}
460
28f49616
JD		 461/*
462 * Interpret complete data packets and report absolute mode input events for
463 * hardware version 3. (12 byte packets for two fingers)
464 */
465static void elantech_report_absolute_v3(struct psmouse *psmouse,
466 int packet_type)
467{
468 struct input_dev *dev = psmouse->dev;
469 struct elantech_data *etd = psmouse->private;
470 unsigned char *packet = psmouse->packet;
471 unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
472 unsigned int width = 0, pres = 0;
473
474 /* byte 0: n1 n0 . . . . R L */
475 fingers = (packet[0] & 0xc0) >> 6;
476
477 switch (fingers) {
478 case 3:
479 case 1:
480 /*
481 * byte 1: . . . . x11 x10 x9 x8
482 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
483 */
484 x1 = ((packet[1] & 0x0f) << 8) | packet[2];
485 /*
486 * byte 4: . . . . y11 y10 y9 y8
487 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
488 */
489 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
490 break;
491
492 case 2:
493 if (packet_type == PACKET_V3_HEAD) {
494 /*
495 * byte 1: . . . . ax11 ax10 ax9 ax8
496 * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
497 */
1dc6edec 498 etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2];
28f49616
JD		 499 /*
500 * byte 4: . . . . ay11 ay10 ay9 ay8
501 * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0
502 */
1dc6edec 503 etd->mt[0].y = etd->y_max -
28f49616
JD		 504 (((packet[4] & 0x0f) << 8) | packet[5]);
505 /*
506 * wait for next packet
507 */
508 return;
509 }
510
511 /* packet_type == PACKET_V3_TAIL */
1dc6edec
JD		 512 x1 = etd->mt[0].x;
513 y1 = etd->mt[0].y;
28f49616
JD		 514 x2 = ((packet[1] & 0x0f) << 8) | packet[2];
515 y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
516 break;
517 }
518
519 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
520 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
521
522 input_report_key(dev, BTN_TOUCH, fingers != 0);
523 if (fingers != 0) {
524 input_report_abs(dev, ABS_X, x1);
525 input_report_abs(dev, ABS_Y, y1);
526 }
527 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
528 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
529 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
530 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
cd9e83e2
HG		 531
532 /* For clickpads map both buttons to BTN_LEFT */
533 if (etd->fw_version & 0x001000) {
534 input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
535 } else {
536 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
537 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
538 }
539
28f49616
JD		 540 input_report_abs(dev, ABS_PRESSURE, pres);
541 input_report_abs(dev, ABS_TOOL_WIDTH, width);
542
543 input_sync(dev);
544}
545
1dc6edec
JD		 546static void elantech_input_sync_v4(struct psmouse *psmouse)
547{
548 struct input_dev *dev = psmouse->dev;
cd9e83e2 549 struct elantech_data *etd = psmouse->private;
1dc6edec
JD		 550 unsigned char *packet = psmouse->packet;
551
cd9e83e2
HG		 552 /* For clickpads map both buttons to BTN_LEFT */
553 if (etd->fw_version & 0x001000) {
554 input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
555 } else {
556 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
557 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
f386474e 558 input_report_key(dev, BTN_MIDDLE, packet[0] & 0x04);
cd9e83e2
HG		 559 }
560
1dc6edec
JD		 561 input_mt_report_pointer_emulation(dev, true);
562 input_sync(dev);
563}
564
565static void process_packet_status_v4(struct psmouse *psmouse)
566{
567 struct input_dev *dev = psmouse->dev;
568 unsigned char *packet = psmouse->packet;
569 unsigned fingers;
570 int i;
571
572 /* notify finger state change */
573 fingers = packet[1] & 0x1f;
574 for (i = 0; i < ETP_MAX_FINGERS; i++) {
575 if ((fingers & (1 << i)) == 0) {
576 input_mt_slot(dev, i);
577 input_mt_report_slot_state(dev, MT_TOOL_FINGER, false);
578 }
579 }
580
581 elantech_input_sync_v4(psmouse);
582}
583
584static void process_packet_head_v4(struct psmouse *psmouse)
585{
586 struct input_dev *dev = psmouse->dev;
587 struct elantech_data *etd = psmouse->private;
588 unsigned char *packet = psmouse->packet;
589 int id = ((packet[3] & 0xe0) >> 5) - 1;
590 int pres, traces;
591
592 if (id < 0)
593 return;
594
595 etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2];
596 etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);
597 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
598 traces = (packet[0] & 0xf0) >> 4;
599
600 input_mt_slot(dev, id);
601 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
602
603 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
604 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
605 input_report_abs(dev, ABS_MT_PRESSURE, pres);
606 input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width);
607 /* report this for backwards compatibility */
608 input_report_abs(dev, ABS_TOOL_WIDTH, traces);
609
610 elantech_input_sync_v4(psmouse);
611}
612
613static void process_packet_motion_v4(struct psmouse *psmouse)
614{
615 struct input_dev *dev = psmouse->dev;
616 struct elantech_data *etd = psmouse->private;
617 unsigned char *packet = psmouse->packet;
618 int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0;
619 int id, sid;
620
621 id = ((packet[0] & 0xe0) >> 5) - 1;
622 if (id < 0)
623 return;
624
625 sid = ((packet[3] & 0xe0) >> 5) - 1;
626 weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1;
627 /*
628 * Motion packets give us the delta of x, y values of specific fingers,
629 * but in two's complement. Let the compiler do the conversion for us.
630 * Also _enlarge_ the numbers to int, in case of overflow.
631 */
632 delta_x1 = (signed char)packet[1];
633 delta_y1 = (signed char)packet[2];
634 delta_x2 = (signed char)packet[4];
635 delta_y2 = (signed char)packet[5];
636
637 etd->mt[id].x += delta_x1 * weight;
638 etd->mt[id].y -= delta_y1 * weight;
639 input_mt_slot(dev, id);
640 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
641 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
642
643 if (sid >= 0) {
644 etd->mt[sid].x += delta_x2 * weight;
645 etd->mt[sid].y -= delta_y2 * weight;
646 input_mt_slot(dev, sid);
647 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x);
648 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y);
649 }
650
651 elantech_input_sync_v4(psmouse);
652}
653
654static void elantech_report_absolute_v4(struct psmouse *psmouse,
655 int packet_type)
656{
657 switch (packet_type) {
658 case PACKET_V4_STATUS:
659 process_packet_status_v4(psmouse);
660 break;
661
662 case PACKET_V4_HEAD:
663 process_packet_head_v4(psmouse);
664 break;
665
666 case PACKET_V4_MOTION:
667 process_packet_motion_v4(psmouse);
668 break;
669
670 case PACKET_UNKNOWN:
671 default:
672 /* impossible to get here */
673 break;
674 }
675}
676
7894f21b 677static int elantech_packet_check_v1(struct psmouse *psmouse)
2a0bd75e
AO		 678{
679 struct elantech_data *etd = psmouse->private;
680 unsigned char *packet = psmouse->packet;
681 unsigned char p1, p2, p3;
682
683 /* Parity bits are placed differently */
504e8bee 684 if (etd->fw_version < 0x020000) {
2a0bd75e
AO		 685 /* byte 0: D U p1 p2 1 p3 R L */
686 p1 = (packet[0] & 0x20) >> 5;
687 p2 = (packet[0] & 0x10) >> 4;
688 } else {
689 /* byte 0: n1 n0 p2 p1 1 p3 R L */
690 p1 = (packet[0] & 0x10) >> 4;
691 p2 = (packet[0] & 0x20) >> 5;
692 }
693
694 p3 = (packet[0] & 0x04) >> 2;
695
696 return etd->parity[packet[1]] == p1 &&
697 etd->parity[packet[2]] == p2 &&
698 etd->parity[packet[3]] == p3;
699}
700
84a90b61
JD		 701static int elantech_debounce_check_v2(struct psmouse *psmouse)
702{
703 /*
704 * When we encounter packet that matches this exactly, it means the
705 * hardware is in debounce status. Just ignore the whole packet.
706 */
707 const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff };
708 unsigned char *packet = psmouse->packet;
709
710 return !memcmp(packet, debounce_packet, sizeof(debounce_packet));
711}
712
7894f21b
JD		 713static int elantech_packet_check_v2(struct psmouse *psmouse)
714{
715 struct elantech_data *etd = psmouse->private;
716 unsigned char *packet = psmouse->packet;
717
718 /*
719 * V2 hardware has two flavors. Older ones that do not report pressure,
720 * and newer ones that reports pressure and width. With newer ones, all
721 * packets (1, 2, 3 finger touch) have the same constant bits. With
722 * older ones, 1/3 finger touch packets and 2 finger touch packets
723 * have different constant bits.
724 * With all three cases, if the constant bits are not exactly what I
725 * expected, I consider them invalid.
726 */
727 if (etd->reports_pressure)
728 return (packet[0] & 0x0c) == 0x04 &&
729 (packet[3] & 0x0f) == 0x02;
730
731 if ((packet[0] & 0xc0) == 0x80)
732 return (packet[0] & 0x0c) == 0x0c &&
733 (packet[3] & 0x0e) == 0x08;
734
735 return (packet[0] & 0x3c) == 0x3c &&
736 (packet[1] & 0xf0) == 0x00 &&
737 (packet[3] & 0x3e) == 0x38 &&
738 (packet[4] & 0xf0) == 0x00;
739}
740
28f49616
JD		 741/*
742 * We check the constant bits to determine what packet type we get,
1dc6edec 743 * so packet checking is mandatory for v3 and later hardware.
28f49616
JD		 744 */
745static int elantech_packet_check_v3(struct psmouse *psmouse)
746{
acc0444b 747 struct elantech_data *etd = psmouse->private;
28f49616
JD		 748 const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff };
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;
acc0444b
MD		 786 bool sanity_check;
787
d0ab5478 788 if (etd->tp_dev && (packet[3] & 0x0f) == 0x06)
caeb0d37
UDB		 789 return PACKET_TRACKPOINT;
790
acc0444b
MD		 791 /*
792 * Sanity check based on the constant bits of a packet.
793 * The constant bits change depending on the value of
794 * the hardware flag 'crc_enabled' but are the same for
795 * every packet, regardless of the type.
796 */
797 if (etd->crc_enabled)
798 sanity_check = ((packet[3] & 0x08) == 0x00);
799 else
800 sanity_check = ((packet[0] & 0x0c) == 0x04 &&
801 (packet[3] & 0x1c) == 0x10);
802
803 if (!sanity_check)
804 return PACKET_UNKNOWN;
1dc6edec 805
9eebed7d
MD		 806 switch (packet_type) {
807 case 0:
808 return PACKET_V4_STATUS;
809
810 case 1:
1dc6edec
JD		 811 return PACKET_V4_HEAD;
812
9eebed7d 813 case 2:
1dc6edec 814 return PACKET_V4_MOTION;
9eebed7d 815 }
1dc6edec
JD		 816
817 return PACKET_UNKNOWN;
818}
819
2a0bd75e
AO		 820/*
821 * Process byte stream from mouse and handle complete packets
822 */
823static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
824{
825 struct elantech_data *etd = psmouse->private;
28f49616 826 int packet_type;
2a0bd75e
AO		 827
828 if (psmouse->pktcnt < psmouse->pktsize)
829 return PSMOUSE_GOOD_DATA;
830
831 if (etd->debug > 1)
b5d21704 832 elantech_packet_dump(psmouse);
2a0bd75e
AO		 833
834 switch (etd->hw_version) {
835 case 1:
7894f21b 836 if (etd->paritycheck && !elantech_packet_check_v1(psmouse))
2a0bd75e
AO		 837 return PSMOUSE_BAD_DATA;
838
839 elantech_report_absolute_v1(psmouse);
840 break;
841
842 case 2:
84a90b61
JD		 843 /* ignore debounce */
844 if (elantech_debounce_check_v2(psmouse))
845 return PSMOUSE_FULL_PACKET;
846
7894f21b
JD		 847 if (etd->paritycheck && !elantech_packet_check_v2(psmouse))
848 return PSMOUSE_BAD_DATA;
849
2a0bd75e
AO		 850 elantech_report_absolute_v2(psmouse);
851 break;
28f49616
JD		 852
853 case 3:
854 packet_type = elantech_packet_check_v3(psmouse);
a2418fc4
UDB		 855 switch (packet_type) {
856 case PACKET_UNKNOWN:
28f49616
JD		 857 return PSMOUSE_BAD_DATA;
858
a2418fc4
UDB		 859 case PACKET_DEBOUNCE:
860 /* ignore debounce */
861 break;
862
863 case PACKET_TRACKPOINT:
864 elantech_report_trackpoint(psmouse, packet_type);
865 break;
866
867 default:
868 elantech_report_absolute_v3(psmouse, packet_type);
869 break;
870 }
871
28f49616 872 break;
1dc6edec
JD		 873
874 case 4:
875 packet_type = elantech_packet_check_v4(psmouse);
caeb0d37
UDB		 876 switch (packet_type) {
877 case PACKET_UNKNOWN:
1dc6edec
JD		 878 return PSMOUSE_BAD_DATA;
879
caeb0d37
UDB		 880 case PACKET_TRACKPOINT:
881 elantech_report_trackpoint(psmouse, packet_type);
882 break;
883
884 default:
885 elantech_report_absolute_v4(psmouse, packet_type);
886 break;
887 }
888
1dc6edec 889 break;
2a0bd75e
AO		 890 }
891
892 return PSMOUSE_FULL_PACKET;
893}
894
bd884149
UDB		 895/*
896 * This writes the reg_07 value again to the hardware at the end of every
897 * set_rate call because the register loses its value. reg_07 allows setting
898 * absolute mode on v4 hardware
899 */
900static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse,
901 unsigned int rate)
902{
903 struct elantech_data *etd = psmouse->private;
904
905 etd->original_set_rate(psmouse, rate);
906 if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
907 psmouse_err(psmouse, "restoring reg_07 failed\n");
908}
909
2a0bd75e
AO		 910/*
911 * Put the touchpad into absolute mode
912 */
913static int elantech_set_absolute_mode(struct psmouse *psmouse)
914{
915 struct elantech_data *etd = psmouse->private;
916 unsigned char val;
917 int tries = ETP_READ_BACK_TRIES;
918 int rc = 0;
919
920 switch (etd->hw_version) {
921 case 1:
922 etd->reg_10 = 0x16;
923 etd->reg_11 = 0x8f;
924 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
925 elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
926 rc = -1;
927 }
928 break;
929
930 case 2:
931 /* Windows driver values */
932 etd->reg_10 = 0x54;
933 etd->reg_11 = 0x88; /* 0x8a */
934 etd->reg_21 = 0x60; /* 0x00 */
935 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
936 elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
937 elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
938 rc = -1;
2a0bd75e 939 }
28f49616
JD		 940 break;
941
942 case 3:
36189cc3
HG		 943 if (etd->set_hw_resolution)
944 etd->reg_10 = 0x0b;
945 else
fb4f8f56 946 etd->reg_10 = 0x01;
36189cc3 947
28f49616
JD		 948 if (elantech_write_reg(psmouse, 0x10, etd->reg_10))
949 rc = -1;
950
951 break;
1dc6edec
JD		 952
953 case 4:
954 etd->reg_07 = 0x01;
955 if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
956 rc = -1;
957
958 goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */
b2546df6
AO		 959 }
960
961 if (rc == 0) {
2a0bd75e 962 /*
b2546df6
AO		 963 * Read back reg 0x10. For hardware version 1 we must make
964 * sure the absolute mode bit is set. For hardware version 2
b5d21704 965 * the touchpad is probably initializing and not ready until
b2546df6 966 * we read back the value we just wrote.
2a0bd75e
AO		 967 */
968 do {
969 rc = elantech_read_reg(psmouse, 0x10, &val);
970 if (rc == 0)
971 break;
972 tries--;
d4ae84a8 973 elantech_debug("retrying read (%d).\n", tries);
2a0bd75e
AO		 974 msleep(ETP_READ_BACK_DELAY);
975 } while (tries > 0);
b2546df6
AO		 976
977 if (rc) {
b5d21704
DT		 978 psmouse_err(psmouse,
979 "failed to read back register 0x10.\n");
b2546df6
AO		 980 } else if (etd->hw_version == 1 &&
981 !(val & ETP_R10_ABSOLUTE_MODE)) {
b5d21704
DT		 982 psmouse_err(psmouse,
983 "touchpad refuses to switch to absolute mode.\n");
b2546df6
AO		 984 rc = -1;
985 }
2a0bd75e
AO		 986 }
987
1dc6edec 988 skip_readback_reg_10:
2a0bd75e 989 if (rc)
b5d21704 990 psmouse_err(psmouse, "failed to initialise registers.\n");
2a0bd75e
AO		 991
992 return rc;
993}
994
28f49616
JD		 995static int elantech_set_range(struct psmouse *psmouse,
996 unsigned int *x_min, unsigned int *y_min,
1dc6edec
JD		 997 unsigned int *x_max, unsigned int *y_max,
998 unsigned int *width)
230282a7
JD		 999{
1000 struct elantech_data *etd = psmouse->private;
28f49616 1001 unsigned char param[3];
1dc6edec 1002 unsigned char traces;
230282a7
JD		 1003
1004 switch (etd->hw_version) {
1005 case 1:
1006 *x_min = ETP_XMIN_V1;
1007 *y_min = ETP_YMIN_V1;
1008 *x_max = ETP_XMAX_V1;
1009 *y_max = ETP_YMAX_V1;
1010 break;
1011
1012 case 2:
1013 if (etd->fw_version == 0x020800 ||
1014 etd->fw_version == 0x020b00 ||
1015 etd->fw_version == 0x020030) {
1016 *x_min = ETP_XMIN_V2;
1017 *y_min = ETP_YMIN_V2;
1018 *x_max = ETP_XMAX_V2;
1019 *y_max = ETP_YMAX_V2;
1020 } else {
84a90b61
JD		 1021 int i;
1022 int fixed_dpi;
1023
230282a7
JD		 1024 i = (etd->fw_version > 0x020800 &&
1025 etd->fw_version < 0x020900) ? 1 : 2;
84a90b61 1026
b56b92a9 1027 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
84a90b61
JD		 1028 return -1;
1029
1030 fixed_dpi = param[1] & 0x10;
1031
1032 if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
b56b92a9 1033 if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
84a90b61
JD		 1034 return -1;
1035
1036 *x_max = (etd->capabilities[1] - i) * param[1] / 2;
1037 *y_max = (etd->capabilities[2] - i) * param[2] / 2;
1038 } else if (etd->fw_version == 0x040216) {
1039 *x_max = 819;
1040 *y_max = 405;
1041 } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) {
1042 *x_max = 900;
1043 *y_max = 500;
1044 } else {
1045 *x_max = (etd->capabilities[1] - i) * 64;
1046 *y_max = (etd->capabilities[2] - i) * 64;
1047 }
230282a7
JD		 1048 }
1049 break;
28f49616
JD		 1050
1051 case 3:
b56b92a9 1052 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
28f49616
JD		 1053 return -1;
1054
1055 *x_max = (0x0f & param[0]) << 8 | param[1];
1056 *y_max = (0xf0 & param[0]) << 4 | param[2];
1057 break;
1dc6edec
JD		 1058
1059 case 4:
b56b92a9 1060 if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
1dc6edec
JD		 1061 return -1;
1062
1063 *x_max = (0x0f & param[0]) << 8 | param[1];
1064 *y_max = (0xf0 & param[0]) << 4 | param[2];
1065 traces = etd->capabilities[1];
1066 if ((traces < 2) || (traces > *x_max))
1067 return -1;
1068
1069 *width = *x_max / (traces - 1);
1070 break;
230282a7 1071 }
28f49616
JD		 1072
1073 return 0;
230282a7
JD		 1074}
1075
3d95fd6a
JD		 1076/*
1077 * (value from firmware) * 10 + 790 = dpi
1078 * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
1079 */
1080static unsigned int elantech_convert_res(unsigned int val)
1081{
1082 return (val * 10 + 790) * 10 / 254;
1083}
1084
1085static int elantech_get_resolution_v4(struct psmouse *psmouse,
1086 unsigned int *x_res,
1087 unsigned int *y_res)
1088{
1089 unsigned char param[3];
1090
1091 if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param))
1092 return -1;
1093
1094 *x_res = elantech_convert_res(param[1] & 0x0f);
1095 *y_res = elantech_convert_res((param[1] & 0xf0) >> 4);
1096
1097 return 0;
1098}
1099
c15bdfd5
HG		 1100/*
1101 * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in
1102 * fw_version for this is based on the following fw_version & caps table:
1103 *
1104 * Laptop-model: fw_version: caps: buttons:
1105 * Acer S3 0x461f00 10, 13, 0e clickpad
1106 * Acer S7-392 0x581f01 50, 17, 0d clickpad
1107 * Acer V5-131 0x461f02 01, 16, 0c clickpad
1108 * Acer V5-551 0x461f00 ? clickpad
1109 * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons
1110 * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons
1111 * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons
bd884149
UDB		 1112 * Asus TP500LN 0x381f17 10, 14, 0e clickpad
1113 * Asus X750JN 0x381f17 10, 14, 0e clickpad
c15bdfd5
HG		 1114 * Asus UX31 0x361f00 20, 15, 0e clickpad
1115 * Asus UX32VD 0x361f02 00, 15, 0e clickpad
1116 * Avatar AVIU-145A2 0x361f00 ? clickpad
47c1ffb2
RK		 1117 * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons
1118 * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons
a2418fc4 1119 * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**)
c15bdfd5
HG		 1120 * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons
1121 * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*)
a2418fc4 1122 * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*)
c15bdfd5
HG		 1123 * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons
1124 * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad
1125 * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad
1126 * Samsung NP900X3E-A02 0x575f03 ? clickpad
1127 * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad
1128 * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons
1129 * Samsung RF710 0x450f00 ? 2 hw buttons
1130 * System76 Pangolin 0x250f01 ? 2 hw buttons
1131 * (*) + 3 trackpoint buttons
a2418fc4
UDB		 1132 * (**) + 0 trackpoint buttons
1133 * Note: Lenovo L430 and Lenovo L430 have the same fw_version/caps
c15bdfd5
HG		 1134 */
1135static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
1136{
1137 struct input_dev *dev = psmouse->dev;
1138 struct elantech_data *etd = psmouse->private;
1139
1140 if (etd->fw_version & 0x001000) {
1141 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1142 __clear_bit(BTN_RIGHT, dev->keybit);
1143 }
1144}
1145
f386474e
UDB		 1146/*
1147 * Some hw_version 4 models do have a middle button
1148 */
1149static const struct dmi_system_id elantech_dmi_has_middle_button[] = {
1150#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1151 {
1152 /* Fujitsu H730 has a middle button */
1153 .matches = {
1154 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1155 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),
1156 },
1157 },
1158#endif
1159 { }
1160};
1161
2a0bd75e
AO		 1162/*
1163 * Set the appropriate event bits for the input subsystem
1164 */
28f49616 1165static int elantech_set_input_params(struct psmouse *psmouse)
2a0bd75e
AO		 1166{
1167 struct input_dev *dev = psmouse->dev;
1168 struct elantech_data *etd = psmouse->private;
1dc6edec 1169 unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
d98399e6 1170 unsigned int x_res = 31, y_res = 31;
230282a7 1171
1dc6edec 1172 if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
28f49616 1173 return -1;
2a0bd75e 1174
e3dde4fb 1175 __set_bit(INPUT_PROP_POINTER, dev->propbit);
2a0bd75e
AO		 1176 __set_bit(EV_KEY, dev->evbit);
1177 __set_bit(EV_ABS, dev->evbit);
c7a1f3cc 1178 __clear_bit(EV_REL, dev->evbit);
2a0bd75e
AO		 1179
1180 __set_bit(BTN_LEFT, dev->keybit);
f386474e
UDB		 1181 if (dmi_check_system(elantech_dmi_has_middle_button))
1182 __set_bit(BTN_MIDDLE, dev->keybit);
2a0bd75e
AO		 1183 __set_bit(BTN_RIGHT, dev->keybit);
1184
1185 __set_bit(BTN_TOUCH, dev->keybit);
1186 __set_bit(BTN_TOOL_FINGER, dev->keybit);
1187 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1188 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1189
1190 switch (etd->hw_version) {
1191 case 1:
1192 /* Rocker button */
504e8bee 1193 if (etd->fw_version < 0x020000 &&
230282a7 1194 (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
2a0bd75e
AO		 1195 __set_bit(BTN_FORWARD, dev->keybit);
1196 __set_bit(BTN_BACK, dev->keybit);
1197 }
230282a7
JD		 1198 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1199 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
2a0bd75e
AO		 1200 break;
1201
1202 case 2:
22462d9f 1203 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
28f49616
JD		 1204 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1205 /* fall through */
1206 case 3:
c15bdfd5
HG		 1207 if (etd->hw_version == 3)
1208 elantech_set_buttonpad_prop(psmouse);
230282a7
JD		 1209 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1210 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
f941c705
ÉP		 1211 if (etd->reports_pressure) {
1212 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1213 ETP_PMAX_V2, 0, 0);
1214 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1215 ETP_WMAX_V2, 0, 0);
1216 }
b4adbbef 1217 input_mt_init_slots(dev, 2, 0);
230282a7
JD		 1218 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1219 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
2a0bd75e 1220 break;
1dc6edec
JD		 1221
1222 case 4:
3d95fd6a
JD		 1223 if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) {
1224 /*
1225 * if query failed, print a warning and leave the values
1226 * zero to resemble synaptics.c behavior.
1227 */
1228 psmouse_warn(psmouse, "couldn't query resolution data.\n");
1229 }
c15bdfd5 1230 elantech_set_buttonpad_prop(psmouse);
1dc6edec
JD		 1231 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1232 /* For X to recognize me as touchpad. */
1233 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
1234 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
1235 /*
1236 * range of pressure and width is the same as v2,
1237 * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
1238 */
1239 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
1240 ETP_PMAX_V2, 0, 0);
1241 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
1242 ETP_WMAX_V2, 0, 0);
1243 /* Multitouch capable pad, up to 5 fingers. */
b4adbbef 1244 input_mt_init_slots(dev, ETP_MAX_FINGERS, 0);
1dc6edec
JD		 1245 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
1246 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
1247 input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2,
1248 ETP_PMAX_V2, 0, 0);
1249 /*
1250 * The firmware reports how many trace lines the finger spans,
1251 * convert to surface unit as Protocol-B requires.
1252 */
1253 input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0,
1254 ETP_WMAX_V2 * width, 0, 0);
1255 break;
2a0bd75e 1256 }
230282a7 1257
d98399e6
PH		 1258 input_abs_set_res(dev, ABS_X, x_res);
1259 input_abs_set_res(dev, ABS_Y, y_res);
1260 if (etd->hw_version > 1) {
1261 input_abs_set_res(dev, ABS_MT_POSITION_X, x_res);
1262 input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res);
1263 }
1264
230282a7 1265 etd->y_max = y_max;
1dc6edec 1266 etd->width = width;
28f49616
JD		 1267
1268 return 0;
2a0bd75e
AO		 1269}
1270
1271struct elantech_attr_data {
1272 size_t field_offset;
1273 unsigned char reg;
1274};
1275
1276/*
1277 * Display a register value by reading a sysfs entry
1278 */
1279static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
1280 char *buf)
1281{
1282 struct elantech_data *etd = psmouse->private;
1283 struct elantech_attr_data *attr = data;
1284 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
1285 int rc = 0;
1286
1287 if (attr->reg)
1288 rc = elantech_read_reg(psmouse, attr->reg, reg);
1289
1290 return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
1291}
1292
1293/*
1294 * Write a register value by writing a sysfs entry
1295 */
1296static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
1297 void *data, const char *buf, size_t count)
1298{
1299 struct elantech_data *etd = psmouse->private;
1300 struct elantech_attr_data *attr = data;
1301 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
76496e7a 1302 unsigned char value;
2a0bd75e
AO		 1303 int err;
1304
76496e7a 1305 err = kstrtou8(buf, 16, &value);
2a0bd75e
AO		 1306 if (err)
1307 return err;
1308
2a0bd75e
AO		 1309 /* Do we need to preserve some bits for version 2 hardware too? */
1310 if (etd->hw_version == 1) {
1311 if (attr->reg == 0x10)
1312 /* Force absolute mode always on */
1313 value |= ETP_R10_ABSOLUTE_MODE;
1314 else if (attr->reg == 0x11)
1315 /* Force 4 byte mode always on */
1316 value |= ETP_R11_4_BYTE_MODE;
1317 }
1318
1319 if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
1320 *reg = value;
1321
1322 return count;
1323}
1324
1325#define ELANTECH_INT_ATTR(_name, _register) \
1326 static struct elantech_attr_data elantech_attr_##_name = { \
1327 .field_offset = offsetof(struct elantech_data, _name), \
1328 .reg = _register, \
1329 }; \
1330 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
1331 &elantech_attr_##_name, \
1332 elantech_show_int_attr, \
1333 elantech_set_int_attr)
1334
1dc6edec 1335ELANTECH_INT_ATTR(reg_07, 0x07);
2a0bd75e
AO		 1336ELANTECH_INT_ATTR(reg_10, 0x10);
1337ELANTECH_INT_ATTR(reg_11, 0x11);
1338ELANTECH_INT_ATTR(reg_20, 0x20);
1339ELANTECH_INT_ATTR(reg_21, 0x21);
1340ELANTECH_INT_ATTR(reg_22, 0x22);
1341ELANTECH_INT_ATTR(reg_23, 0x23);
1342ELANTECH_INT_ATTR(reg_24, 0x24);
1343ELANTECH_INT_ATTR(reg_25, 0x25);
1344ELANTECH_INT_ATTR(reg_26, 0x26);
1345ELANTECH_INT_ATTR(debug, 0);
1346ELANTECH_INT_ATTR(paritycheck, 0);
2d9eb81f 1347ELANTECH_INT_ATTR(crc_enabled, 0);
2a0bd75e
AO		 1348
1349static struct attribute *elantech_attrs[] = {
1dc6edec 1350 &psmouse_attr_reg_07.dattr.attr,
2a0bd75e
AO		 1351 &psmouse_attr_reg_10.dattr.attr,
1352 &psmouse_attr_reg_11.dattr.attr,
1353 &psmouse_attr_reg_20.dattr.attr,
1354 &psmouse_attr_reg_21.dattr.attr,
1355 &psmouse_attr_reg_22.dattr.attr,
1356 &psmouse_attr_reg_23.dattr.attr,
1357 &psmouse_attr_reg_24.dattr.attr,
1358 &psmouse_attr_reg_25.dattr.attr,
1359 &psmouse_attr_reg_26.dattr.attr,
1360 &psmouse_attr_debug.dattr.attr,
1361 &psmouse_attr_paritycheck.dattr.attr,
2d9eb81f 1362 &psmouse_attr_crc_enabled.dattr.attr,
2a0bd75e
AO		 1363 NULL
1364};
1365
1366static struct attribute_group elantech_attr_group = {
1367 .attrs = elantech_attrs,
1368};
1369
a083632e
DT		 1370static bool elantech_is_signature_valid(const unsigned char *param)
1371{
1372 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 };
1373 int i;
1374
1375 if (param[0] == 0)
1376 return false;
1377
1378 if (param[1] == 0)
1379 return true;
1380
271329b3 1381 /*
5f0ee9d1
HG		 1382 * Some hw_version >= 4 models have a revision higher then 20. Meaning
1383 * that param[2] may be 10 or 20, skip the rates check for these.
271329b3 1384 */
5f0ee9d1
HG		 1385 if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f &&
1386 param[2] < 40)
271329b3
HG		 1387 return true;
1388
a083632e
DT		 1389 for (i = 0; i < ARRAY_SIZE(rates); i++)
1390 if (param[2] == rates[i])
1391 return false;
1392
1393 return true;
1394}
1395
2a0bd75e
AO		 1396/*
1397 * Use magic knock to detect Elantech touchpad
1398 */
b7802c5c 1399int elantech_detect(struct psmouse *psmouse, bool set_properties)
2a0bd75e
AO		 1400{
1401 struct ps2dev *ps2dev = &psmouse->ps2dev;
1402 unsigned char param[3];
1403
1404 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1405
1406 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1407 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1408 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1409 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1410 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
b5d21704 1411 psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n");
2a0bd75e
AO		 1412 return -1;
1413 }
1414
1415 /*
1416 * Report this in case there are Elantech models that use a different
1417 * set of magic numbers
1418 */
28f49616
JD		 1419 if (param[0] != 0x3c || param[1] != 0x03 ||
1420 (param[2] != 0xc8 && param[2] != 0x00)) {
b5d21704
DT		 1421 psmouse_dbg(psmouse,
1422 "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
1423 param[0], param[1], param[2]);
9ab7b25e
AO		 1424 return -1;
1425 }
1426
1427 /*
1428 * Query touchpad's firmware version and see if it reports known
1429 * value to avoid mis-detection. Logitech mice are known to respond
1430 * to Elantech magic knock and there might be more.
1431 */
1432 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1433 psmouse_dbg(psmouse, "failed to query firmware version.\n");
9ab7b25e
AO		 1434 return -1;
1435 }
1436
b5d21704
DT		 1437 psmouse_dbg(psmouse,
1438 "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
1439 param[0], param[1], param[2]);
9ab7b25e 1440
a083632e 1441 if (!elantech_is_signature_valid(param)) {
b5d21704
DT		 1442 psmouse_dbg(psmouse,
1443 "Probably not a real Elantech touchpad. Aborting.\n");
4af61e90 1444 return -1;
2a0bd75e
AO		 1445 }
1446
1447 if (set_properties) {
1448 psmouse->vendor = "Elantech";
1449 psmouse->name = "Touchpad";
1450 }
1451
1452 return 0;
1453}
1454
1455/*
1456 * Clean up sysfs entries when disconnecting
1457 */
1458static void elantech_disconnect(struct psmouse *psmouse)
1459{
a2418fc4
UDB		 1460 struct elantech_data *etd = psmouse->private;
1461
1462 if (etd->tp_dev)
1463 input_unregister_device(etd->tp_dev);
2a0bd75e
AO		 1464 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1465 &elantech_attr_group);
1466 kfree(psmouse->private);
1467 psmouse->private = NULL;
1468}
1469
1470/*
1471 * Put the touchpad back into absolute mode when reconnecting
1472 */
1473static int elantech_reconnect(struct psmouse *psmouse)
1474{
a67ada7a
JD		 1475 psmouse_reset(psmouse);
1476
2a0bd75e
AO		 1477 if (elantech_detect(psmouse, 0))
1478 return -1;
1479
1480 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1481 psmouse_err(psmouse,
1482 "failed to put touchpad back into absolute mode.\n");
2a0bd75e
AO		 1483 return -1;
1484 }
1485
1486 return 0;
1487}
1488
0dc15879
UDB		 1489/*
1490 * Some hw_version 4 models do not work with crc_disabled
1491 */
1492static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = {
1493#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1494 {
1495 /* Fujitsu H730 does not work with crc_enabled == 0 */
1496 .matches = {
1497 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1498 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),
1499 },
1500 },
47c1ffb2
RK		 1501 {
1502 /* Fujitsu LIFEBOOK E554 does not work with crc_enabled == 0 */
1503 .matches = {
1504 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1505 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E554"),
1506 },
1507 },
1508 {
1509 /* Fujitsu LIFEBOOK E544 does not work with crc_enabled == 0 */
1510 .matches = {
1511 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
1512 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544"),
1513 },
1514 },
0dc15879
UDB		 1515#endif
1516 { }
1517};
1518
36189cc3 1519/*
fb4f8f56
HG		 1520 * Some hw_version 3 models go into error state when we try to set
1521 * bit 3 and/or bit 1 of r10.
36189cc3
HG		 1522 */
1523static const struct dmi_system_id no_hw_res_dmi_table[] = {
1524#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1525 {
1526 /* Gigabyte U2442 */
1527 .matches = {
1528 DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
1529 DMI_MATCH(DMI_PRODUCT_NAME, "U2442"),
1530 },
1531 },
1532#endif
1533 { }
1534};
1535
3c8bbb95
JD		 1536/*
1537 * determine hardware version and set some properties according to it.
1538 */
28f49616 1539static int elantech_set_properties(struct elantech_data *etd)
3c8bbb95 1540{
3940d618 1541 /* This represents the version of IC body. */
1dc6edec
JD		 1542 int ver = (etd->fw_version & 0x0f0000) >> 16;
1543
3940d618 1544 /* Early version of Elan touchpads doesn't obey the rule. */
3c8bbb95
JD		 1545 if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
1546 etd->hw_version = 1;
3940d618
JD		 1547 else {
1548 switch (ver) {
1549 case 2:
1550 case 4:
1551 etd->hw_version = 2;
1552 break;
1553 case 5:
1554 etd->hw_version = 3;
1555 break;
1556 case 6:
9eebed7d 1557 case 7:
9cb80b96 1558 case 8:
ae4bedf0 1559 case 9:
810aa091
S		 1560 case 10:
1561 case 13:
692dd191 1562 case 14:
3940d618
JD		 1563 etd->hw_version = 4;
1564 break;
1565 default:
1566 return -1;
1567 }
1568 }
3c8bbb95 1569
b56b92a9
JD		 1570 /* decide which send_cmd we're gonna use early */
1571 etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :
1572 synaptics_send_cmd;
1573
1574 /* Turn on packet checking by default */
3c8bbb95
JD		 1575 etd->paritycheck = 1;
1576
1577 /*
1578 * This firmware suffers from misreporting coordinates when
1579 * a touch action starts causing the mouse cursor or scrolled page
1580 * to jump. Enable a workaround.
1581 */
1582 etd->jumpy_cursor =
1583 (etd->fw_version == 0x020022 || etd->fw_version == 0x020600);
1584
28f49616 1585 if (etd->hw_version > 1) {
3c8bbb95
JD		 1586 /* For now show extra debug information */
1587 etd->debug = 1;
1588
1589 if (etd->fw_version >= 0x020800)
1590 etd->reports_pressure = true;
1591 }
28f49616 1592
acc0444b
MD		 1593 /*
1594 * The signatures of v3 and v4 packets change depending on the
1595 * value of this hardware flag.
1596 */
0dc15879
UDB		 1597 etd->crc_enabled = (etd->fw_version & 0x4000) == 0x4000 ||
1598 dmi_check_system(elantech_dmi_force_crc_enabled);
acc0444b 1599
36189cc3
HG		 1600 /* Enable real hardware resolution on hw_version 3 ? */
1601 etd->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);
1602
28f49616 1603 return 0;
3c8bbb95
JD		 1604}
1605
2a0bd75e
AO		 1606/*
1607 * Initialize the touchpad and create sysfs entries
1608 */
1609int elantech_init(struct psmouse *psmouse)
1610{
1611 struct elantech_data *etd;
a2418fc4
UDB		 1612 int i;
1613 int error = -EINVAL;
2a0bd75e 1614 unsigned char param[3];
a2418fc4 1615 struct input_dev *tp_dev;
2a0bd75e 1616
9ab7b25e 1617 psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
2a0bd75e 1618 if (!etd)
6792cbbb 1619 return -ENOMEM;
2a0bd75e 1620
a67ada7a
JD		 1621 psmouse_reset(psmouse);
1622
2a0bd75e
AO		 1623 etd->parity[0] = 1;
1624 for (i = 1; i < 256; i++)
1625 etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
1626
1627 /*
9ab7b25e 1628 * Do the version query again so we can store the result
2a0bd75e
AO		 1629 */
1630 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
b5d21704 1631 psmouse_err(psmouse, "failed to query firmware version.\n");
2a0bd75e
AO		 1632 goto init_fail;
1633 }
504e8bee 1634 etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
28f49616
JD		 1635
1636 if (elantech_set_properties(etd)) {
b5d21704 1637 psmouse_err(psmouse, "unknown hardware version, aborting...\n");
28f49616
JD		 1638 goto init_fail;
1639 }
b5d21704
DT		 1640 psmouse_info(psmouse,
1641 "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
1642 etd->hw_version, param[0], param[1], param[2]);
2a0bd75e 1643
b56b92a9 1644 if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
230282a7 1645 etd->capabilities)) {
b5d21704 1646 psmouse_err(psmouse, "failed to query capabilities.\n");
2a0bd75e
AO		 1647 goto init_fail;
1648 }
b5d21704
DT		 1649 psmouse_info(psmouse,
1650 "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
1651 etd->capabilities[0], etd->capabilities[1],
1652 etd->capabilities[2]);
2a0bd75e
AO		 1653
1654 if (elantech_set_absolute_mode(psmouse)) {
b5d21704
DT		 1655 psmouse_err(psmouse,
1656 "failed to put touchpad into absolute mode.\n");
2a0bd75e
AO		 1657 goto init_fail;
1658 }
1659
bd884149
UDB		 1660 if (etd->fw_version == 0x381f17) {
1661 etd->original_set_rate = psmouse->set_rate;
1662 psmouse->set_rate = elantech_set_rate_restore_reg_07;
1663 }
1664
28f49616 1665 if (elantech_set_input_params(psmouse)) {
b5d21704 1666 psmouse_err(psmouse, "failed to query touchpad range.\n");
28f49616
JD		 1667 goto init_fail;
1668 }
2a0bd75e
AO		 1669
1670 error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
1671 &elantech_attr_group);
1672 if (error) {
b5d21704
DT		 1673 psmouse_err(psmouse,
1674 "failed to create sysfs attributes, error: %d.\n",
1675 error);
2a0bd75e
AO		 1676 goto init_fail;
1677 }
1678
a2418fc4
UDB		 1679 /* The MSB indicates the presence of the trackpoint */
1680 if ((etd->capabilities[0] & 0x80) == 0x80) {
1681 tp_dev = input_allocate_device();
1682
1683 if (!tp_dev) {
1684 error = -ENOMEM;
1685 goto init_fail_tp_alloc;
1686 }
1687
1688 etd->tp_dev = tp_dev;
1689 snprintf(etd->tp_phys, sizeof(etd->tp_phys), "%s/input1",
1690 psmouse->ps2dev.serio->phys);
1691 tp_dev->phys = etd->tp_phys;
1692 tp_dev->name = "Elantech PS/2 TrackPoint";
1693 tp_dev->id.bustype = BUS_I8042;
1694 tp_dev->id.vendor = 0x0002;
1695 tp_dev->id.product = PSMOUSE_ELANTECH;
1696 tp_dev->id.version = 0x0000;
1697 tp_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1698 tp_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1699 tp_dev->relbit[BIT_WORD(REL_X)] =
1700 BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1701 tp_dev->keybit[BIT_WORD(BTN_LEFT)] =
1702 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) |
1703 BIT_MASK(BTN_RIGHT);
7611392f 1704
01d4cd5c 1705 __set_bit(INPUT_PROP_POINTER, tp_dev->propbit);
7611392f
HG		 1706 __set_bit(INPUT_PROP_POINTING_STICK, tp_dev->propbit);
1707
a2418fc4
UDB		 1708 error = input_register_device(etd->tp_dev);
1709 if (error < 0)
1710 goto init_fail_tp_reg;
1711 }
1712
2a0bd75e
AO		 1713 psmouse->protocol_handler = elantech_process_byte;
1714 psmouse->disconnect = elantech_disconnect;
1715 psmouse->reconnect = elantech_reconnect;
28f49616 1716 psmouse->pktsize = etd->hw_version > 1 ? 6 : 4;
2a0bd75e
AO		 1717
1718 return 0;
a2418fc4
UDB		 1719 init_fail_tp_reg:
1720 input_free_device(tp_dev);
1721 init_fail_tp_alloc:
1722 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1723 &elantech_attr_group);
2a0bd75e 1724 init_fail:
ac84eba2 1725 psmouse_reset(psmouse);
2a0bd75e 1726 kfree(etd);
a2418fc4 1727 return error;
2a0bd75e 1728}
Linux 6.x block layer and io_uring tree(s)