1 // SPDX-License-Identifier: GPL-2.0-only
3 * Elantech Touchpad driver (v6)
5 * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
7 * Trademarks are the property of their respective owners.
10 #include <linux/delay.h>
11 #include <linux/dmi.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/i2c.h>
15 #include <linux/input.h>
16 #include <linux/input/mt.h>
17 #include <linux/platform_device.h>
18 #include <linux/serio.h>
19 #include <linux/libps2.h>
20 #include <asm/unaligned.h>
25 #define elantech_debug(fmt, ...) \
27 if (etd->info.debug) \
28 psmouse_printk(KERN_DEBUG, psmouse, \
29 fmt, ##__VA_ARGS__); \
33 * Send a Synaptics style sliced query command
35 static int synaptics_send_cmd(struct psmouse
*psmouse
, unsigned char c
,
38 if (ps2_sliced_command(&psmouse
->ps2dev
, c
) ||
39 ps2_command(&psmouse
->ps2dev
, param
, PSMOUSE_CMD_GETINFO
)) {
40 psmouse_err(psmouse
, "%s query 0x%02x failed.\n", __func__
, c
);
48 * V3 and later support this fast command
50 static int elantech_send_cmd(struct psmouse
*psmouse
, unsigned char c
,
53 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
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
);
66 * A retrying version of ps2_command
68 static int elantech_ps2_command(struct psmouse
*psmouse
,
69 unsigned char *param
, int command
)
71 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
72 struct elantech_data
*etd
= psmouse
->private;
74 int tries
= ETP_PS2_COMMAND_TRIES
;
77 rc
= ps2_command(ps2dev
, param
, command
);
81 elantech_debug("retrying ps2 command 0x%02x (%d).\n",
83 msleep(ETP_PS2_COMMAND_DELAY
);
87 psmouse_err(psmouse
, "ps2 command 0x%02x failed.\n", command
);
93 * Send an Elantech style special command to read 3 bytes from a register
95 static int elantech_read_reg_params(struct psmouse
*psmouse
, u8 reg
, u8
*param
)
97 if (elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
98 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_READWRITE
) ||
99 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
100 elantech_ps2_command(psmouse
, NULL
, reg
) ||
101 elantech_ps2_command(psmouse
, param
, PSMOUSE_CMD_GETINFO
)) {
103 "failed to read register %#02x\n", reg
);
111 * Send an Elantech style special command to write a register with a parameter
113 static int elantech_write_reg_params(struct psmouse
*psmouse
, u8 reg
, u8
*param
)
115 if (elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
116 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_READWRITE
) ||
117 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
118 elantech_ps2_command(psmouse
, NULL
, reg
) ||
119 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
120 elantech_ps2_command(psmouse
, NULL
, param
[0]) ||
121 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
122 elantech_ps2_command(psmouse
, NULL
, param
[1]) ||
123 elantech_ps2_command(psmouse
, NULL
, PSMOUSE_CMD_SETSCALE11
)) {
125 "failed to write register %#02x with value %#02x%#02x\n",
126 reg
, param
[0], param
[1]);
134 * Send an Elantech style special command to read a value from a register
136 static int elantech_read_reg(struct psmouse
*psmouse
, unsigned char reg
,
139 struct elantech_data
*etd
= psmouse
->private;
140 unsigned char param
[3];
143 if (reg
< 0x07 || reg
> 0x26)
146 if (reg
> 0x11 && reg
< 0x20)
149 switch (etd
->info
.hw_version
) {
151 if (ps2_sliced_command(&psmouse
->ps2dev
, ETP_REGISTER_READ
) ||
152 ps2_sliced_command(&psmouse
->ps2dev
, reg
) ||
153 ps2_command(&psmouse
->ps2dev
, param
, PSMOUSE_CMD_GETINFO
)) {
159 if (elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
160 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_READ
) ||
161 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
162 elantech_ps2_command(psmouse
, NULL
, reg
) ||
163 elantech_ps2_command(psmouse
, param
, PSMOUSE_CMD_GETINFO
)) {
169 if (elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
170 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_READWRITE
) ||
171 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
172 elantech_ps2_command(psmouse
, NULL
, reg
) ||
173 elantech_ps2_command(psmouse
, param
, PSMOUSE_CMD_GETINFO
)) {
180 psmouse_err(psmouse
, "failed to read register 0x%02x.\n", reg
);
181 else if (etd
->info
.hw_version
!= 4)
190 * Send an Elantech style special command to write a register with a value
192 static int elantech_write_reg(struct psmouse
*psmouse
, unsigned char reg
,
195 struct elantech_data
*etd
= psmouse
->private;
198 if (reg
< 0x07 || reg
> 0x26)
201 if (reg
> 0x11 && reg
< 0x20)
204 switch (etd
->info
.hw_version
) {
206 if (ps2_sliced_command(&psmouse
->ps2dev
, ETP_REGISTER_WRITE
) ||
207 ps2_sliced_command(&psmouse
->ps2dev
, reg
) ||
208 ps2_sliced_command(&psmouse
->ps2dev
, val
) ||
209 ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_SETSCALE11
)) {
215 if (elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
216 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_WRITE
) ||
217 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
218 elantech_ps2_command(psmouse
, NULL
, reg
) ||
219 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
220 elantech_ps2_command(psmouse
, NULL
, val
) ||
221 elantech_ps2_command(psmouse
, NULL
, PSMOUSE_CMD_SETSCALE11
)) {
227 if (elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
228 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_READWRITE
) ||
229 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
230 elantech_ps2_command(psmouse
, NULL
, reg
) ||
231 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
232 elantech_ps2_command(psmouse
, NULL
, val
) ||
233 elantech_ps2_command(psmouse
, NULL
, PSMOUSE_CMD_SETSCALE11
)) {
239 if (elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
240 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_READWRITE
) ||
241 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
242 elantech_ps2_command(psmouse
, NULL
, reg
) ||
243 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
244 elantech_ps2_command(psmouse
, NULL
, ETP_REGISTER_READWRITE
) ||
245 elantech_ps2_command(psmouse
, NULL
, ETP_PS2_CUSTOM_COMMAND
) ||
246 elantech_ps2_command(psmouse
, NULL
, val
) ||
247 elantech_ps2_command(psmouse
, NULL
, PSMOUSE_CMD_SETSCALE11
)) {
255 "failed to write register 0x%02x with value 0x%02x.\n",
262 * Dump a complete mouse movement packet to the syslog
264 static void elantech_packet_dump(struct psmouse
*psmouse
)
266 psmouse_printk(KERN_DEBUG
, psmouse
, "PS/2 packet [%*ph]\n",
267 psmouse
->pktsize
, psmouse
->packet
);
271 * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in
272 * fw_version for this is based on the following fw_version & caps table:
274 * Laptop-model: fw_version: caps: buttons:
275 * Acer S3 0x461f00 10, 13, 0e clickpad
276 * Acer S7-392 0x581f01 50, 17, 0d clickpad
277 * Acer V5-131 0x461f02 01, 16, 0c clickpad
278 * Acer V5-551 0x461f00 ? clickpad
279 * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons
280 * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons
281 * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons
282 * Asus TP500LN 0x381f17 10, 14, 0e clickpad
283 * Asus X750JN 0x381f17 10, 14, 0e clickpad
284 * Asus UX31 0x361f00 20, 15, 0e clickpad
285 * Asus UX32VD 0x361f02 00, 15, 0e clickpad
286 * Avatar AVIU-145A2 0x361f00 ? clickpad
287 * Fujitsu CELSIUS H760 0x570f02 40, 14, 0c 3 hw buttons (**)
288 * Fujitsu CELSIUS H780 0x5d0f02 41, 16, 0d 3 hw buttons (**)
289 * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons
290 * Fujitsu LIFEBOOK E546 0x470f00 50, 12, 09 2 hw buttons
291 * Fujitsu LIFEBOOK E547 0x470f00 50, 12, 09 2 hw buttons
292 * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons
293 * Fujitsu LIFEBOOK E557 0x570f01 40, 14, 0c 2 hw buttons
294 * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons
295 * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**)
296 * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons
297 * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*)
298 * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*)
299 * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons
300 * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad
301 * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad
302 * Samsung NP900X3E-A02 0x575f03 ? clickpad
303 * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad
304 * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons
305 * Samsung RF710 0x450f00 ? 2 hw buttons
306 * System76 Pangolin 0x250f01 ? 2 hw buttons
307 * (*) + 3 trackpoint buttons
308 * (**) + 0 trackpoint buttons
309 * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps
311 static inline int elantech_is_buttonpad(struct elantech_device_info
*info
)
313 return info
->fw_version
& 0x001000;
317 * Interpret complete data packets and report absolute mode input events for
318 * hardware version 1. (4 byte packets)
320 static void elantech_report_absolute_v1(struct psmouse
*psmouse
)
322 struct input_dev
*dev
= psmouse
->dev
;
323 struct elantech_data
*etd
= psmouse
->private;
324 unsigned char *packet
= psmouse
->packet
;
327 if (etd
->info
.fw_version
< 0x020000) {
329 * byte 0: D U p1 p2 1 p3 R L
330 * byte 1: f 0 th tw x9 x8 y9 y8
332 fingers
= ((packet
[1] & 0x80) >> 7) +
333 ((packet
[1] & 0x30) >> 4);
336 * byte 0: n1 n0 p2 p1 1 p3 R L
337 * byte 1: 0 0 0 0 x9 x8 y9 y8
339 fingers
= (packet
[0] & 0xc0) >> 6;
342 if (etd
->info
.jumpy_cursor
) {
344 etd
->single_finger_reports
= 0;
345 } else if (etd
->single_finger_reports
< 2) {
346 /* Discard first 2 reports of one finger, bogus */
347 etd
->single_finger_reports
++;
348 elantech_debug("discarding packet\n");
353 input_report_key(dev
, BTN_TOUCH
, fingers
!= 0);
356 * byte 2: x7 x6 x5 x4 x3 x2 x1 x0
357 * byte 3: y7 y6 y5 y4 y3 y2 y1 y0
360 input_report_abs(dev
, ABS_X
,
361 ((packet
[1] & 0x0c) << 6) | packet
[2]);
362 input_report_abs(dev
, ABS_Y
,
363 etd
->y_max
- (((packet
[1] & 0x03) << 8) | packet
[3]));
366 input_report_key(dev
, BTN_TOOL_FINGER
, fingers
== 1);
367 input_report_key(dev
, BTN_TOOL_DOUBLETAP
, fingers
== 2);
368 input_report_key(dev
, BTN_TOOL_TRIPLETAP
, fingers
== 3);
370 psmouse_report_standard_buttons(dev
, packet
[0]);
372 if (etd
->info
.fw_version
< 0x020000 &&
373 (etd
->info
.capabilities
[0] & ETP_CAP_HAS_ROCKER
)) {
375 input_report_key(dev
, BTN_FORWARD
, packet
[0] & 0x40);
377 input_report_key(dev
, BTN_BACK
, packet
[0] & 0x80);
383 static void elantech_set_slot(struct input_dev
*dev
, int slot
, bool active
,
384 unsigned int x
, unsigned int y
)
386 input_mt_slot(dev
, slot
);
387 input_mt_report_slot_state(dev
, MT_TOOL_FINGER
, active
);
389 input_report_abs(dev
, ABS_MT_POSITION_X
, x
);
390 input_report_abs(dev
, ABS_MT_POSITION_Y
, y
);
394 /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */
395 static void elantech_report_semi_mt_data(struct input_dev
*dev
,
396 unsigned int num_fingers
,
397 unsigned int x1
, unsigned int y1
,
398 unsigned int x2
, unsigned int y2
)
400 elantech_set_slot(dev
, 0, num_fingers
!= 0, x1
, y1
);
401 elantech_set_slot(dev
, 1, num_fingers
>= 2, x2
, y2
);
405 * Interpret complete data packets and report absolute mode input events for
406 * hardware version 2. (6 byte packets)
408 static void elantech_report_absolute_v2(struct psmouse
*psmouse
)
410 struct elantech_data
*etd
= psmouse
->private;
411 struct input_dev
*dev
= psmouse
->dev
;
412 unsigned char *packet
= psmouse
->packet
;
413 unsigned int fingers
, x1
= 0, y1
= 0, x2
= 0, y2
= 0;
414 unsigned int width
= 0, pres
= 0;
416 /* byte 0: n1 n0 . . . . R L */
417 fingers
= (packet
[0] & 0xc0) >> 6;
422 * Same as one finger, except report of more than 3 fingers:
423 * byte 3: n4 . w1 w0 . . . .
425 if (packet
[3] & 0x80)
430 * byte 1: . . . . x11 x10 x9 x8
431 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
433 x1
= ((packet
[1] & 0x0f) << 8) | packet
[2];
435 * byte 4: . . . . y11 y10 y9 y8
436 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
438 y1
= etd
->y_max
- (((packet
[4] & 0x0f) << 8) | packet
[5]);
440 pres
= (packet
[1] & 0xf0) | ((packet
[4] & 0xf0) >> 4);
441 width
= ((packet
[0] & 0x30) >> 2) | ((packet
[3] & 0x30) >> 4);
446 * The coordinate of each finger is reported separately
447 * with a lower resolution for two finger touches:
448 * byte 0: . . ay8 ax8 . . . .
449 * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
451 x1
= (((packet
[0] & 0x10) << 4) | packet
[1]) << 2;
452 /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
454 ((((packet
[0] & 0x20) << 3) | packet
[2]) << 2);
456 * byte 3: . . by8 bx8 . . . .
457 * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0
459 x2
= (((packet
[3] & 0x10) << 4) | packet
[4]) << 2;
460 /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
462 ((((packet
[3] & 0x20) << 3) | packet
[5]) << 2);
464 /* Unknown so just report sensible values */
470 input_report_key(dev
, BTN_TOUCH
, fingers
!= 0);
472 input_report_abs(dev
, ABS_X
, x1
);
473 input_report_abs(dev
, ABS_Y
, y1
);
475 elantech_report_semi_mt_data(dev
, fingers
, x1
, y1
, x2
, y2
);
476 input_report_key(dev
, BTN_TOOL_FINGER
, fingers
== 1);
477 input_report_key(dev
, BTN_TOOL_DOUBLETAP
, fingers
== 2);
478 input_report_key(dev
, BTN_TOOL_TRIPLETAP
, fingers
== 3);
479 input_report_key(dev
, BTN_TOOL_QUADTAP
, fingers
== 4);
480 psmouse_report_standard_buttons(dev
, packet
[0]);
481 if (etd
->info
.reports_pressure
) {
482 input_report_abs(dev
, ABS_PRESSURE
, pres
);
483 input_report_abs(dev
, ABS_TOOL_WIDTH
, width
);
489 static void elantech_report_trackpoint(struct psmouse
*psmouse
,
493 * byte 0: 0 0 sx sy 0 M R L
494 * byte 1:~sx 0 0 0 0 0 0 0
495 * byte 2:~sy 0 0 0 0 0 0 0
496 * byte 3: 0 0 ~sy ~sx 0 1 1 0
497 * byte 4: x7 x6 x5 x4 x3 x2 x1 x0
498 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
500 * x and y are written in two's complement spread
501 * over 9 bits with sx/sy the relative top bit and
502 * x7..x0 and y7..y0 the lower bits.
503 * The sign of y is opposite to what the input driver
504 * expects for a relative movement
507 struct elantech_data
*etd
= psmouse
->private;
508 struct input_dev
*tp_dev
= etd
->tp_dev
;
509 unsigned char *packet
= psmouse
->packet
;
513 t
= get_unaligned_le32(&packet
[0]);
522 * This firmware misreport coordinates for trackpoint
523 * occasionally. Discard packets outside of [-127, 127] range
524 * to prevent cursor jumps.
526 if (packet
[4] == 0x80 || packet
[5] == 0x80 ||
527 packet
[1] >> 7 == packet
[4] >> 7 ||
528 packet
[2] >> 7 == packet
[5] >> 7) {
529 elantech_debug("discarding packet [%6ph]\n", packet
);
533 x
= packet
[4] - (int)((packet
[1]^0x80) << 1);
534 y
= (int)((packet
[2]^0x80) << 1) - packet
[5];
536 psmouse_report_standard_buttons(tp_dev
, packet
[0]);
538 input_report_rel(tp_dev
, REL_X
, x
);
539 input_report_rel(tp_dev
, REL_Y
, y
);
546 /* Dump unexpected packet sequences if debug=1 (default) */
547 if (etd
->info
.debug
== 1)
548 elantech_packet_dump(psmouse
);
555 * Interpret complete data packets and report absolute mode input events for
556 * hardware version 3. (12 byte packets for two fingers)
558 static void elantech_report_absolute_v3(struct psmouse
*psmouse
,
561 struct input_dev
*dev
= psmouse
->dev
;
562 struct elantech_data
*etd
= psmouse
->private;
563 unsigned char *packet
= psmouse
->packet
;
564 unsigned int fingers
= 0, x1
= 0, y1
= 0, x2
= 0, y2
= 0;
565 unsigned int width
= 0, pres
= 0;
567 /* byte 0: n1 n0 . . . . R L */
568 fingers
= (packet
[0] & 0xc0) >> 6;
574 * byte 1: . . . . x11 x10 x9 x8
575 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0
577 x1
= ((packet
[1] & 0x0f) << 8) | packet
[2];
579 * byte 4: . . . . y11 y10 y9 y8
580 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0
582 y1
= etd
->y_max
- (((packet
[4] & 0x0f) << 8) | packet
[5]);
586 if (packet_type
== PACKET_V3_HEAD
) {
588 * byte 1: . . . . ax11 ax10 ax9 ax8
589 * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
591 etd
->mt
[0].x
= ((packet
[1] & 0x0f) << 8) | packet
[2];
593 * byte 4: . . . . ay11 ay10 ay9 ay8
594 * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0
596 etd
->mt
[0].y
= etd
->y_max
-
597 (((packet
[4] & 0x0f) << 8) | packet
[5]);
599 * wait for next packet
604 /* packet_type == PACKET_V3_TAIL */
607 x2
= ((packet
[1] & 0x0f) << 8) | packet
[2];
608 y2
= etd
->y_max
- (((packet
[4] & 0x0f) << 8) | packet
[5]);
612 pres
= (packet
[1] & 0xf0) | ((packet
[4] & 0xf0) >> 4);
613 width
= ((packet
[0] & 0x30) >> 2) | ((packet
[3] & 0x30) >> 4);
615 input_report_key(dev
, BTN_TOUCH
, fingers
!= 0);
617 input_report_abs(dev
, ABS_X
, x1
);
618 input_report_abs(dev
, ABS_Y
, y1
);
620 elantech_report_semi_mt_data(dev
, fingers
, x1
, y1
, x2
, y2
);
621 input_report_key(dev
, BTN_TOOL_FINGER
, fingers
== 1);
622 input_report_key(dev
, BTN_TOOL_DOUBLETAP
, fingers
== 2);
623 input_report_key(dev
, BTN_TOOL_TRIPLETAP
, fingers
== 3);
625 /* For clickpads map both buttons to BTN_LEFT */
626 if (elantech_is_buttonpad(&etd
->info
))
627 input_report_key(dev
, BTN_LEFT
, packet
[0] & 0x03);
629 psmouse_report_standard_buttons(dev
, packet
[0]);
631 input_report_abs(dev
, ABS_PRESSURE
, pres
);
632 input_report_abs(dev
, ABS_TOOL_WIDTH
, width
);
637 static void elantech_input_sync_v4(struct psmouse
*psmouse
)
639 struct input_dev
*dev
= psmouse
->dev
;
640 struct elantech_data
*etd
= psmouse
->private;
641 unsigned char *packet
= psmouse
->packet
;
643 /* For clickpads map both buttons to BTN_LEFT */
644 if (elantech_is_buttonpad(&etd
->info
))
645 input_report_key(dev
, BTN_LEFT
, packet
[0] & 0x03);
647 psmouse_report_standard_buttons(dev
, packet
[0]);
649 input_mt_report_pointer_emulation(dev
, true);
653 static void process_packet_status_v4(struct psmouse
*psmouse
)
655 struct input_dev
*dev
= psmouse
->dev
;
656 unsigned char *packet
= psmouse
->packet
;
660 /* notify finger state change */
661 fingers
= packet
[1] & 0x1f;
662 for (i
= 0; i
< ETP_MAX_FINGERS
; i
++) {
663 if ((fingers
& (1 << i
)) == 0) {
664 input_mt_slot(dev
, i
);
665 input_mt_report_slot_state(dev
, MT_TOOL_FINGER
, false);
669 elantech_input_sync_v4(psmouse
);
672 static void process_packet_head_v4(struct psmouse
*psmouse
)
674 struct input_dev
*dev
= psmouse
->dev
;
675 struct elantech_data
*etd
= psmouse
->private;
676 unsigned char *packet
= psmouse
->packet
;
680 id
= ((packet
[3] & 0xe0) >> 5) - 1;
681 if (id
< 0 || id
>= ETP_MAX_FINGERS
)
684 etd
->mt
[id
].x
= ((packet
[1] & 0x0f) << 8) | packet
[2];
685 etd
->mt
[id
].y
= etd
->y_max
- (((packet
[4] & 0x0f) << 8) | packet
[5]);
686 pres
= (packet
[1] & 0xf0) | ((packet
[4] & 0xf0) >> 4);
687 traces
= (packet
[0] & 0xf0) >> 4;
689 input_mt_slot(dev
, id
);
690 input_mt_report_slot_state(dev
, MT_TOOL_FINGER
, true);
692 input_report_abs(dev
, ABS_MT_POSITION_X
, etd
->mt
[id
].x
);
693 input_report_abs(dev
, ABS_MT_POSITION_Y
, etd
->mt
[id
].y
);
694 input_report_abs(dev
, ABS_MT_PRESSURE
, pres
);
695 input_report_abs(dev
, ABS_MT_TOUCH_MAJOR
, traces
* etd
->width
);
696 /* report this for backwards compatibility */
697 input_report_abs(dev
, ABS_TOOL_WIDTH
, traces
);
699 elantech_input_sync_v4(psmouse
);
702 static void process_packet_motion_v4(struct psmouse
*psmouse
)
704 struct input_dev
*dev
= psmouse
->dev
;
705 struct elantech_data
*etd
= psmouse
->private;
706 unsigned char *packet
= psmouse
->packet
;
707 int weight
, delta_x1
= 0, delta_y1
= 0, delta_x2
= 0, delta_y2
= 0;
710 id
= ((packet
[0] & 0xe0) >> 5) - 1;
711 if (id
< 0 || id
>= ETP_MAX_FINGERS
)
714 sid
= ((packet
[3] & 0xe0) >> 5) - 1;
715 weight
= (packet
[0] & 0x10) ? ETP_WEIGHT_VALUE
: 1;
717 * Motion packets give us the delta of x, y values of specific fingers,
718 * but in two's complement. Let the compiler do the conversion for us.
719 * Also _enlarge_ the numbers to int, in case of overflow.
721 delta_x1
= (signed char)packet
[1];
722 delta_y1
= (signed char)packet
[2];
723 delta_x2
= (signed char)packet
[4];
724 delta_y2
= (signed char)packet
[5];
726 etd
->mt
[id
].x
+= delta_x1
* weight
;
727 etd
->mt
[id
].y
-= delta_y1
* weight
;
728 input_mt_slot(dev
, id
);
729 input_report_abs(dev
, ABS_MT_POSITION_X
, etd
->mt
[id
].x
);
730 input_report_abs(dev
, ABS_MT_POSITION_Y
, etd
->mt
[id
].y
);
732 if (sid
>= 0 && sid
< ETP_MAX_FINGERS
) {
733 etd
->mt
[sid
].x
+= delta_x2
* weight
;
734 etd
->mt
[sid
].y
-= delta_y2
* weight
;
735 input_mt_slot(dev
, sid
);
736 input_report_abs(dev
, ABS_MT_POSITION_X
, etd
->mt
[sid
].x
);
737 input_report_abs(dev
, ABS_MT_POSITION_Y
, etd
->mt
[sid
].y
);
740 elantech_input_sync_v4(psmouse
);
743 static void elantech_report_absolute_v4(struct psmouse
*psmouse
,
746 switch (packet_type
) {
747 case PACKET_V4_STATUS
:
748 process_packet_status_v4(psmouse
);
752 process_packet_head_v4(psmouse
);
755 case PACKET_V4_MOTION
:
756 process_packet_motion_v4(psmouse
);
761 /* impossible to get here */
766 static int elantech_packet_check_v1(struct psmouse
*psmouse
)
768 struct elantech_data
*etd
= psmouse
->private;
769 unsigned char *packet
= psmouse
->packet
;
770 unsigned char p1
, p2
, p3
;
772 /* Parity bits are placed differently */
773 if (etd
->info
.fw_version
< 0x020000) {
774 /* byte 0: D U p1 p2 1 p3 R L */
775 p1
= (packet
[0] & 0x20) >> 5;
776 p2
= (packet
[0] & 0x10) >> 4;
778 /* byte 0: n1 n0 p2 p1 1 p3 R L */
779 p1
= (packet
[0] & 0x10) >> 4;
780 p2
= (packet
[0] & 0x20) >> 5;
783 p3
= (packet
[0] & 0x04) >> 2;
785 return etd
->parity
[packet
[1]] == p1
&&
786 etd
->parity
[packet
[2]] == p2
&&
787 etd
->parity
[packet
[3]] == p3
;
790 static int elantech_debounce_check_v2(struct psmouse
*psmouse
)
793 * When we encounter packet that matches this exactly, it means the
794 * hardware is in debounce status. Just ignore the whole packet.
796 static const u8 debounce_packet
[] = {
797 0x84, 0xff, 0xff, 0x02, 0xff, 0xff
799 unsigned char *packet
= psmouse
->packet
;
801 return !memcmp(packet
, debounce_packet
, sizeof(debounce_packet
));
804 static int elantech_packet_check_v2(struct psmouse
*psmouse
)
806 struct elantech_data
*etd
= psmouse
->private;
807 unsigned char *packet
= psmouse
->packet
;
810 * V2 hardware has two flavors. Older ones that do not report pressure,
811 * and newer ones that reports pressure and width. With newer ones, all
812 * packets (1, 2, 3 finger touch) have the same constant bits. With
813 * older ones, 1/3 finger touch packets and 2 finger touch packets
814 * have different constant bits.
815 * With all three cases, if the constant bits are not exactly what I
816 * expected, I consider them invalid.
818 if (etd
->info
.reports_pressure
)
819 return (packet
[0] & 0x0c) == 0x04 &&
820 (packet
[3] & 0x0f) == 0x02;
822 if ((packet
[0] & 0xc0) == 0x80)
823 return (packet
[0] & 0x0c) == 0x0c &&
824 (packet
[3] & 0x0e) == 0x08;
826 return (packet
[0] & 0x3c) == 0x3c &&
827 (packet
[1] & 0xf0) == 0x00 &&
828 (packet
[3] & 0x3e) == 0x38 &&
829 (packet
[4] & 0xf0) == 0x00;
833 * We check the constant bits to determine what packet type we get,
834 * so packet checking is mandatory for v3 and later hardware.
836 static int elantech_packet_check_v3(struct psmouse
*psmouse
)
838 struct elantech_data
*etd
= psmouse
->private;
839 static const u8 debounce_packet
[] = {
840 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff
842 unsigned char *packet
= psmouse
->packet
;
845 * check debounce first, it has the same signature in byte 0
846 * and byte 3 as PACKET_V3_HEAD.
848 if (!memcmp(packet
, debounce_packet
, sizeof(debounce_packet
)))
849 return PACKET_DEBOUNCE
;
852 * If the hardware flag 'crc_enabled' is set the packets have
853 * different signatures.
855 if (etd
->info
.crc_enabled
) {
856 if ((packet
[3] & 0x09) == 0x08)
857 return PACKET_V3_HEAD
;
859 if ((packet
[3] & 0x09) == 0x09)
860 return PACKET_V3_TAIL
;
862 if ((packet
[0] & 0x0c) == 0x04 && (packet
[3] & 0xcf) == 0x02)
863 return PACKET_V3_HEAD
;
865 if ((packet
[0] & 0x0c) == 0x0c && (packet
[3] & 0xce) == 0x0c)
866 return PACKET_V3_TAIL
;
867 if ((packet
[3] & 0x0f) == 0x06)
868 return PACKET_TRACKPOINT
;
871 return PACKET_UNKNOWN
;
874 static int elantech_packet_check_v4(struct psmouse
*psmouse
)
876 struct elantech_data
*etd
= psmouse
->private;
877 unsigned char *packet
= psmouse
->packet
;
878 unsigned char packet_type
= packet
[3] & 0x03;
879 unsigned int ic_version
;
882 if (etd
->tp_dev
&& (packet
[3] & 0x0f) == 0x06)
883 return PACKET_TRACKPOINT
;
885 /* This represents the version of IC body. */
886 ic_version
= (etd
->info
.fw_version
& 0x0f0000) >> 16;
889 * Sanity check based on the constant bits of a packet.
890 * The constant bits change depending on the value of
891 * the hardware flag 'crc_enabled' and the version of
892 * the IC body, but are the same for every packet,
893 * regardless of the type.
895 if (etd
->info
.crc_enabled
)
896 sanity_check
= ((packet
[3] & 0x08) == 0x00);
897 else if (ic_version
== 7 && etd
->info
.samples
[1] == 0x2A)
898 sanity_check
= ((packet
[3] & 0x1c) == 0x10);
900 sanity_check
= ((packet
[0] & 0x08) == 0x00 &&
901 (packet
[3] & 0x1c) == 0x10);
904 return PACKET_UNKNOWN
;
906 switch (packet_type
) {
908 return PACKET_V4_STATUS
;
911 return PACKET_V4_HEAD
;
914 return PACKET_V4_MOTION
;
917 return PACKET_UNKNOWN
;
921 * Process byte stream from mouse and handle complete packets
923 static psmouse_ret_t
elantech_process_byte(struct psmouse
*psmouse
)
925 struct elantech_data
*etd
= psmouse
->private;
928 if (psmouse
->pktcnt
< psmouse
->pktsize
)
929 return PSMOUSE_GOOD_DATA
;
931 if (etd
->info
.debug
> 1)
932 elantech_packet_dump(psmouse
);
934 switch (etd
->info
.hw_version
) {
936 if (etd
->info
.paritycheck
&& !elantech_packet_check_v1(psmouse
))
937 return PSMOUSE_BAD_DATA
;
939 elantech_report_absolute_v1(psmouse
);
943 /* ignore debounce */
944 if (elantech_debounce_check_v2(psmouse
))
945 return PSMOUSE_FULL_PACKET
;
947 if (etd
->info
.paritycheck
&& !elantech_packet_check_v2(psmouse
))
948 return PSMOUSE_BAD_DATA
;
950 elantech_report_absolute_v2(psmouse
);
954 packet_type
= elantech_packet_check_v3(psmouse
);
955 switch (packet_type
) {
957 return PSMOUSE_BAD_DATA
;
959 case PACKET_DEBOUNCE
:
960 /* ignore debounce */
963 case PACKET_TRACKPOINT
:
964 elantech_report_trackpoint(psmouse
, packet_type
);
968 elantech_report_absolute_v3(psmouse
, packet_type
);
975 packet_type
= elantech_packet_check_v4(psmouse
);
976 switch (packet_type
) {
978 return PSMOUSE_BAD_DATA
;
980 case PACKET_TRACKPOINT
:
981 elantech_report_trackpoint(psmouse
, packet_type
);
985 elantech_report_absolute_v4(psmouse
, packet_type
);
992 return PSMOUSE_FULL_PACKET
;
996 * This writes the reg_07 value again to the hardware at the end of every
997 * set_rate call because the register loses its value. reg_07 allows setting
998 * absolute mode on v4 hardware
1000 static void elantech_set_rate_restore_reg_07(struct psmouse
*psmouse
,
1003 struct elantech_data
*etd
= psmouse
->private;
1005 etd
->original_set_rate(psmouse
, rate
);
1006 if (elantech_write_reg(psmouse
, 0x07, etd
->reg_07
))
1007 psmouse_err(psmouse
, "restoring reg_07 failed\n");
1011 * Put the touchpad into absolute mode
1013 static int elantech_set_absolute_mode(struct psmouse
*psmouse
)
1015 struct elantech_data
*etd
= psmouse
->private;
1017 int tries
= ETP_READ_BACK_TRIES
;
1020 switch (etd
->info
.hw_version
) {
1024 if (elantech_write_reg(psmouse
, 0x10, etd
->reg_10
) ||
1025 elantech_write_reg(psmouse
, 0x11, etd
->reg_11
)) {
1031 /* Windows driver values */
1033 etd
->reg_11
= 0x88; /* 0x8a */
1034 etd
->reg_21
= 0x60; /* 0x00 */
1035 if (elantech_write_reg(psmouse
, 0x10, etd
->reg_10
) ||
1036 elantech_write_reg(psmouse
, 0x11, etd
->reg_11
) ||
1037 elantech_write_reg(psmouse
, 0x21, etd
->reg_21
)) {
1043 if (etd
->info
.set_hw_resolution
)
1048 if (elantech_write_reg(psmouse
, 0x10, etd
->reg_10
))
1055 if (elantech_write_reg(psmouse
, 0x07, etd
->reg_07
))
1058 goto skip_readback_reg_10
; /* v4 has no reg 0x10 to read */
1063 * Read back reg 0x10. For hardware version 1 we must make
1064 * sure the absolute mode bit is set. For hardware version 2
1065 * the touchpad is probably initializing and not ready until
1066 * we read back the value we just wrote.
1069 rc
= elantech_read_reg(psmouse
, 0x10, &val
);
1073 elantech_debug("retrying read (%d).\n", tries
);
1074 msleep(ETP_READ_BACK_DELAY
);
1075 } while (tries
> 0);
1078 psmouse_err(psmouse
,
1079 "failed to read back register 0x10.\n");
1080 } else if (etd
->info
.hw_version
== 1 &&
1081 !(val
& ETP_R10_ABSOLUTE_MODE
)) {
1082 psmouse_err(psmouse
,
1083 "touchpad refuses to switch to absolute mode.\n");
1088 skip_readback_reg_10
:
1090 psmouse_err(psmouse
, "failed to initialise registers.\n");
1096 * (value from firmware) * 10 + 790 = dpi
1097 * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
1099 static unsigned int elantech_convert_res(unsigned int val
)
1101 return (val
* 10 + 790) * 10 / 254;
1104 static int elantech_get_resolution_v4(struct psmouse
*psmouse
,
1105 unsigned int *x_res
,
1106 unsigned int *y_res
,
1109 unsigned char param
[3];
1111 if (elantech_send_cmd(psmouse
, ETP_RESOLUTION_QUERY
, param
))
1114 *x_res
= elantech_convert_res(param
[1] & 0x0f);
1115 *y_res
= elantech_convert_res((param
[1] & 0xf0) >> 4);
1121 static void elantech_set_buttonpad_prop(struct psmouse
*psmouse
)
1123 struct input_dev
*dev
= psmouse
->dev
;
1124 struct elantech_data
*etd
= psmouse
->private;
1126 if (elantech_is_buttonpad(&etd
->info
)) {
1127 __set_bit(INPUT_PROP_BUTTONPAD
, dev
->propbit
);
1128 __clear_bit(BTN_RIGHT
, dev
->keybit
);
1133 * Some hw_version 4 models do have a middle button
1135 static const struct dmi_system_id elantech_dmi_has_middle_button
[] = {
1136 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1138 /* Fujitsu H730 has a middle button */
1140 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1141 DMI_MATCH(DMI_PRODUCT_NAME
, "CELSIUS H730"),
1145 /* Fujitsu H760 also has a middle button */
1147 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1148 DMI_MATCH(DMI_PRODUCT_NAME
, "CELSIUS H760"),
1152 /* Fujitsu H780 also has a middle button */
1154 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1155 DMI_MATCH(DMI_PRODUCT_NAME
, "CELSIUS H780"),
1163 * Set the appropriate event bits for the input subsystem
1165 static int elantech_set_input_params(struct psmouse
*psmouse
)
1167 struct input_dev
*dev
= psmouse
->dev
;
1168 struct elantech_data
*etd
= psmouse
->private;
1169 struct elantech_device_info
*info
= &etd
->info
;
1170 unsigned int x_min
= info
->x_min
, y_min
= info
->y_min
,
1171 x_max
= info
->x_max
, y_max
= info
->y_max
,
1172 width
= info
->width
;
1174 __set_bit(INPUT_PROP_POINTER
, dev
->propbit
);
1175 __set_bit(EV_KEY
, dev
->evbit
);
1176 __set_bit(EV_ABS
, dev
->evbit
);
1177 __clear_bit(EV_REL
, dev
->evbit
);
1179 __set_bit(BTN_LEFT
, dev
->keybit
);
1180 if (info
->has_middle_button
)
1181 __set_bit(BTN_MIDDLE
, dev
->keybit
);
1182 __set_bit(BTN_RIGHT
, dev
->keybit
);
1184 __set_bit(BTN_TOUCH
, dev
->keybit
);
1185 __set_bit(BTN_TOOL_FINGER
, dev
->keybit
);
1186 __set_bit(BTN_TOOL_DOUBLETAP
, dev
->keybit
);
1187 __set_bit(BTN_TOOL_TRIPLETAP
, dev
->keybit
);
1189 switch (info
->hw_version
) {
1192 if (info
->fw_version
< 0x020000 &&
1193 (info
->capabilities
[0] & ETP_CAP_HAS_ROCKER
)) {
1194 __set_bit(BTN_FORWARD
, dev
->keybit
);
1195 __set_bit(BTN_BACK
, dev
->keybit
);
1197 input_set_abs_params(dev
, ABS_X
, x_min
, x_max
, 0, 0);
1198 input_set_abs_params(dev
, ABS_Y
, y_min
, y_max
, 0, 0);
1202 __set_bit(BTN_TOOL_QUADTAP
, dev
->keybit
);
1203 __set_bit(INPUT_PROP_SEMI_MT
, dev
->propbit
);
1206 if (info
->hw_version
== 3)
1207 elantech_set_buttonpad_prop(psmouse
);
1208 input_set_abs_params(dev
, ABS_X
, x_min
, x_max
, 0, 0);
1209 input_set_abs_params(dev
, ABS_Y
, y_min
, y_max
, 0, 0);
1210 if (info
->reports_pressure
) {
1211 input_set_abs_params(dev
, ABS_PRESSURE
, ETP_PMIN_V2
,
1213 input_set_abs_params(dev
, ABS_TOOL_WIDTH
, ETP_WMIN_V2
,
1216 input_mt_init_slots(dev
, 2, INPUT_MT_SEMI_MT
);
1217 input_set_abs_params(dev
, ABS_MT_POSITION_X
, x_min
, x_max
, 0, 0);
1218 input_set_abs_params(dev
, ABS_MT_POSITION_Y
, y_min
, y_max
, 0, 0);
1222 elantech_set_buttonpad_prop(psmouse
);
1223 __set_bit(BTN_TOOL_QUADTAP
, dev
->keybit
);
1224 /* For X to recognize me as touchpad. */
1225 input_set_abs_params(dev
, ABS_X
, x_min
, x_max
, 0, 0);
1226 input_set_abs_params(dev
, ABS_Y
, y_min
, y_max
, 0, 0);
1228 * range of pressure and width is the same as v2,
1229 * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
1231 input_set_abs_params(dev
, ABS_PRESSURE
, ETP_PMIN_V2
,
1233 input_set_abs_params(dev
, ABS_TOOL_WIDTH
, ETP_WMIN_V2
,
1235 /* Multitouch capable pad, up to 5 fingers. */
1236 input_mt_init_slots(dev
, ETP_MAX_FINGERS
, 0);
1237 input_set_abs_params(dev
, ABS_MT_POSITION_X
, x_min
, x_max
, 0, 0);
1238 input_set_abs_params(dev
, ABS_MT_POSITION_Y
, y_min
, y_max
, 0, 0);
1239 input_set_abs_params(dev
, ABS_MT_PRESSURE
, ETP_PMIN_V2
,
1242 * The firmware reports how many trace lines the finger spans,
1243 * convert to surface unit as Protocol-B requires.
1245 input_set_abs_params(dev
, ABS_MT_TOUCH_MAJOR
, 0,
1246 ETP_WMAX_V2
* width
, 0, 0);
1250 input_abs_set_res(dev
, ABS_X
, info
->x_res
);
1251 input_abs_set_res(dev
, ABS_Y
, info
->y_res
);
1252 if (info
->hw_version
> 1) {
1253 input_abs_set_res(dev
, ABS_MT_POSITION_X
, info
->x_res
);
1254 input_abs_set_res(dev
, ABS_MT_POSITION_Y
, info
->y_res
);
1263 struct elantech_attr_data
{
1264 size_t field_offset
;
1269 * Display a register value by reading a sysfs entry
1271 static ssize_t
elantech_show_int_attr(struct psmouse
*psmouse
, void *data
,
1274 struct elantech_data
*etd
= psmouse
->private;
1275 struct elantech_attr_data
*attr
= data
;
1276 unsigned char *reg
= (unsigned char *) etd
+ attr
->field_offset
;
1280 rc
= elantech_read_reg(psmouse
, attr
->reg
, reg
);
1282 return sprintf(buf
, "0x%02x\n", (attr
->reg
&& rc
) ? -1 : *reg
);
1286 * Write a register value by writing a sysfs entry
1288 static ssize_t
elantech_set_int_attr(struct psmouse
*psmouse
,
1289 void *data
, const char *buf
, size_t count
)
1291 struct elantech_data
*etd
= psmouse
->private;
1292 struct elantech_attr_data
*attr
= data
;
1293 unsigned char *reg
= (unsigned char *) etd
+ attr
->field_offset
;
1294 unsigned char value
;
1297 err
= kstrtou8(buf
, 16, &value
);
1301 /* Do we need to preserve some bits for version 2 hardware too? */
1302 if (etd
->info
.hw_version
== 1) {
1303 if (attr
->reg
== 0x10)
1304 /* Force absolute mode always on */
1305 value
|= ETP_R10_ABSOLUTE_MODE
;
1306 else if (attr
->reg
== 0x11)
1307 /* Force 4 byte mode always on */
1308 value
|= ETP_R11_4_BYTE_MODE
;
1311 if (!attr
->reg
|| elantech_write_reg(psmouse
, attr
->reg
, value
) == 0)
1317 #define ELANTECH_INT_ATTR(_name, _register) \
1318 static struct elantech_attr_data elantech_attr_##_name = { \
1319 .field_offset = offsetof(struct elantech_data, _name), \
1322 PSMOUSE_DEFINE_ATTR(_name, 0644, \
1323 &elantech_attr_##_name, \
1324 elantech_show_int_attr, \
1325 elantech_set_int_attr)
1327 #define ELANTECH_INFO_ATTR(_name) \
1328 static struct elantech_attr_data elantech_attr_##_name = { \
1329 .field_offset = offsetof(struct elantech_data, info) + \
1330 offsetof(struct elantech_device_info, _name), \
1333 PSMOUSE_DEFINE_ATTR(_name, 0644, \
1334 &elantech_attr_##_name, \
1335 elantech_show_int_attr, \
1336 elantech_set_int_attr)
1338 ELANTECH_INT_ATTR(reg_07
, 0x07);
1339 ELANTECH_INT_ATTR(reg_10
, 0x10);
1340 ELANTECH_INT_ATTR(reg_11
, 0x11);
1341 ELANTECH_INT_ATTR(reg_20
, 0x20);
1342 ELANTECH_INT_ATTR(reg_21
, 0x21);
1343 ELANTECH_INT_ATTR(reg_22
, 0x22);
1344 ELANTECH_INT_ATTR(reg_23
, 0x23);
1345 ELANTECH_INT_ATTR(reg_24
, 0x24);
1346 ELANTECH_INT_ATTR(reg_25
, 0x25);
1347 ELANTECH_INT_ATTR(reg_26
, 0x26);
1348 ELANTECH_INFO_ATTR(debug
);
1349 ELANTECH_INFO_ATTR(paritycheck
);
1350 ELANTECH_INFO_ATTR(crc_enabled
);
1352 static struct attribute
*elantech_attrs
[] = {
1353 &psmouse_attr_reg_07
.dattr
.attr
,
1354 &psmouse_attr_reg_10
.dattr
.attr
,
1355 &psmouse_attr_reg_11
.dattr
.attr
,
1356 &psmouse_attr_reg_20
.dattr
.attr
,
1357 &psmouse_attr_reg_21
.dattr
.attr
,
1358 &psmouse_attr_reg_22
.dattr
.attr
,
1359 &psmouse_attr_reg_23
.dattr
.attr
,
1360 &psmouse_attr_reg_24
.dattr
.attr
,
1361 &psmouse_attr_reg_25
.dattr
.attr
,
1362 &psmouse_attr_reg_26
.dattr
.attr
,
1363 &psmouse_attr_debug
.dattr
.attr
,
1364 &psmouse_attr_paritycheck
.dattr
.attr
,
1365 &psmouse_attr_crc_enabled
.dattr
.attr
,
1369 static const struct attribute_group elantech_attr_group
= {
1370 .attrs
= elantech_attrs
,
1373 static bool elantech_is_signature_valid(const unsigned char *param
)
1375 static const unsigned char rates
[] = { 200, 100, 80, 60, 40, 20, 10 };
1385 * Some hw_version >= 4 models have a revision higher then 20. Meaning
1386 * that param[2] may be 10 or 20, skip the rates check for these.
1388 if ((param
[0] & 0x0f) >= 0x06 && (param
[1] & 0xaf) == 0x0f &&
1392 for (i
= 0; i
< ARRAY_SIZE(rates
); i
++)
1393 if (param
[2] == rates
[i
])
1400 * Use magic knock to detect Elantech touchpad
1402 int elantech_detect(struct psmouse
*psmouse
, bool set_properties
)
1404 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
1405 unsigned char param
[3];
1407 ps2_command(ps2dev
, NULL
, PSMOUSE_CMD_RESET_DIS
);
1409 if (ps2_command(ps2dev
, NULL
, PSMOUSE_CMD_DISABLE
) ||
1410 ps2_command(ps2dev
, NULL
, PSMOUSE_CMD_SETSCALE11
) ||
1411 ps2_command(ps2dev
, NULL
, PSMOUSE_CMD_SETSCALE11
) ||
1412 ps2_command(ps2dev
, NULL
, PSMOUSE_CMD_SETSCALE11
) ||
1413 ps2_command(ps2dev
, param
, PSMOUSE_CMD_GETINFO
)) {
1414 psmouse_dbg(psmouse
, "sending Elantech magic knock failed.\n");
1419 * Report this in case there are Elantech models that use a different
1420 * set of magic numbers
1422 if (param
[0] != 0x3c || param
[1] != 0x03 ||
1423 (param
[2] != 0xc8 && param
[2] != 0x00)) {
1424 psmouse_dbg(psmouse
,
1425 "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
1426 param
[0], param
[1], param
[2]);
1431 * Query touchpad's firmware version and see if it reports known
1432 * value to avoid mis-detection. Logitech mice are known to respond
1433 * to Elantech magic knock and there might be more.
1435 if (synaptics_send_cmd(psmouse
, ETP_FW_VERSION_QUERY
, param
)) {
1436 psmouse_dbg(psmouse
, "failed to query firmware version.\n");
1440 psmouse_dbg(psmouse
,
1441 "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
1442 param
[0], param
[1], param
[2]);
1444 if (!elantech_is_signature_valid(param
)) {
1445 psmouse_dbg(psmouse
,
1446 "Probably not a real Elantech touchpad. Aborting.\n");
1450 if (set_properties
) {
1451 psmouse
->vendor
= "Elantech";
1452 psmouse
->name
= "Touchpad";
1459 * Clean up sysfs entries when disconnecting
1461 static void elantech_disconnect(struct psmouse
*psmouse
)
1463 struct elantech_data
*etd
= psmouse
->private;
1466 * We might have left a breadcrumb when trying to
1467 * set up SMbus companion.
1469 psmouse_smbus_cleanup(psmouse
);
1472 input_unregister_device(etd
->tp_dev
);
1473 sysfs_remove_group(&psmouse
->ps2dev
.serio
->dev
.kobj
,
1474 &elantech_attr_group
);
1475 kfree(psmouse
->private);
1476 psmouse
->private = NULL
;
1480 * Put the touchpad back into absolute mode when reconnecting
1482 static int elantech_reconnect(struct psmouse
*psmouse
)
1484 psmouse_reset(psmouse
);
1486 if (elantech_detect(psmouse
, 0))
1489 if (elantech_set_absolute_mode(psmouse
)) {
1490 psmouse_err(psmouse
,
1491 "failed to put touchpad back into absolute mode.\n");
1499 * Some hw_version 4 models do not work with crc_disabled
1501 static const struct dmi_system_id elantech_dmi_force_crc_enabled
[] = {
1502 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1504 /* Fujitsu H730 does not work with crc_enabled == 0 */
1506 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1507 DMI_MATCH(DMI_PRODUCT_NAME
, "CELSIUS H730"),
1511 /* Fujitsu H760 does not work with crc_enabled == 0 */
1513 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1514 DMI_MATCH(DMI_PRODUCT_NAME
, "CELSIUS H760"),
1518 /* Fujitsu LIFEBOOK E544 does not work with crc_enabled == 0 */
1520 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1521 DMI_MATCH(DMI_PRODUCT_NAME
, "LIFEBOOK E544"),
1525 /* Fujitsu LIFEBOOK E546 does not work with crc_enabled == 0 */
1527 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1528 DMI_MATCH(DMI_PRODUCT_NAME
, "LIFEBOOK E546"),
1532 /* Fujitsu LIFEBOOK E547 does not work with crc_enabled == 0 */
1534 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1535 DMI_MATCH(DMI_PRODUCT_NAME
, "LIFEBOOK E547"),
1539 /* Fujitsu LIFEBOOK E554 does not work with crc_enabled == 0 */
1541 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1542 DMI_MATCH(DMI_PRODUCT_NAME
, "LIFEBOOK E554"),
1546 /* Fujitsu LIFEBOOK E556 does not work with crc_enabled == 0 */
1548 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1549 DMI_MATCH(DMI_PRODUCT_NAME
, "LIFEBOOK E556"),
1553 /* Fujitsu LIFEBOOK E557 does not work with crc_enabled == 0 */
1555 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1556 DMI_MATCH(DMI_PRODUCT_NAME
, "LIFEBOOK E557"),
1560 /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */
1562 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU"),
1563 DMI_MATCH(DMI_PRODUCT_NAME
, "LIFEBOOK U745"),
1571 * Some hw_version 3 models go into error state when we try to set
1572 * bit 3 and/or bit 1 of r10.
1574 static const struct dmi_system_id no_hw_res_dmi_table
[] = {
1575 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1577 /* Gigabyte U2442 */
1579 DMI_MATCH(DMI_SYS_VENDOR
, "GIGABYTE"),
1580 DMI_MATCH(DMI_PRODUCT_NAME
, "U2442"),
1588 * Change Report id 0x5E to 0x5F.
1590 static int elantech_change_report_id(struct psmouse
*psmouse
)
1593 * NOTE: the code is expecting to receive param[] as an array of 3
1594 * items (see __ps2_command()), even if in this case only 2 are
1595 * actually needed. Make sure the array size is 3 to avoid potential
1596 * stack out-of-bound accesses.
1598 unsigned char param
[3] = { 0x10, 0x03 };
1600 if (elantech_write_reg_params(psmouse
, 0x7, param
) ||
1601 elantech_read_reg_params(psmouse
, 0x7, param
) ||
1602 param
[0] != 0x10 || param
[1] != 0x03) {
1603 psmouse_err(psmouse
, "Unable to change report ID to 0x5f.\n");
1610 * determine hardware version and set some properties according to it.
1612 static int elantech_set_properties(struct elantech_device_info
*info
)
1614 /* This represents the version of IC body. */
1615 info
->ic_version
= (info
->fw_version
& 0x0f0000) >> 16;
1617 /* Early version of Elan touchpads doesn't obey the rule. */
1618 if (info
->fw_version
< 0x020030 || info
->fw_version
== 0x020600)
1619 info
->hw_version
= 1;
1621 switch (info
->ic_version
) {
1624 info
->hw_version
= 2;
1627 info
->hw_version
= 3;
1630 info
->hw_version
= 4;
1637 /* Get information pattern for hw_version 4 */
1638 info
->pattern
= 0x00;
1639 if (info
->ic_version
== 0x0f && (info
->fw_version
& 0xff) <= 0x02)
1640 info
->pattern
= info
->fw_version
& 0xff;
1642 /* decide which send_cmd we're gonna use early */
1643 info
->send_cmd
= info
->hw_version
>= 3 ? elantech_send_cmd
:
1646 /* Turn on packet checking by default */
1647 info
->paritycheck
= 1;
1650 * This firmware suffers from misreporting coordinates when
1651 * a touch action starts causing the mouse cursor or scrolled page
1652 * to jump. Enable a workaround.
1654 info
->jumpy_cursor
=
1655 (info
->fw_version
== 0x020022 || info
->fw_version
== 0x020600);
1657 if (info
->hw_version
> 1) {
1658 /* For now show extra debug information */
1661 if (info
->fw_version
>= 0x020800)
1662 info
->reports_pressure
= true;
1666 * The signatures of v3 and v4 packets change depending on the
1667 * value of this hardware flag.
1669 info
->crc_enabled
= (info
->fw_version
& 0x4000) == 0x4000 ||
1670 dmi_check_system(elantech_dmi_force_crc_enabled
);
1672 /* Enable real hardware resolution on hw_version 3 ? */
1673 info
->set_hw_resolution
= !dmi_check_system(no_hw_res_dmi_table
);
1678 static int elantech_query_info(struct psmouse
*psmouse
,
1679 struct elantech_device_info
*info
)
1681 unsigned char param
[3];
1682 unsigned char traces
;
1683 unsigned char ic_body
[3];
1685 memset(info
, 0, sizeof(*info
));
1688 * Do the version query again so we can store the result
1690 if (synaptics_send_cmd(psmouse
, ETP_FW_VERSION_QUERY
, param
)) {
1691 psmouse_err(psmouse
, "failed to query firmware version.\n");
1694 info
->fw_version
= (param
[0] << 16) | (param
[1] << 8) | param
[2];
1696 if (elantech_set_properties(info
)) {
1697 psmouse_err(psmouse
, "unknown hardware version, aborting...\n");
1700 psmouse_info(psmouse
,
1701 "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
1702 info
->hw_version
, param
[0], param
[1], param
[2]);
1704 if (info
->send_cmd(psmouse
, ETP_CAPABILITIES_QUERY
,
1705 info
->capabilities
)) {
1706 psmouse_err(psmouse
, "failed to query capabilities.\n");
1709 psmouse_info(psmouse
,
1710 "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
1711 info
->capabilities
[0], info
->capabilities
[1],
1712 info
->capabilities
[2]);
1714 if (info
->hw_version
!= 1) {
1715 if (info
->send_cmd(psmouse
, ETP_SAMPLE_QUERY
, info
->samples
)) {
1716 psmouse_err(psmouse
, "failed to query sample data\n");
1719 psmouse_info(psmouse
,
1720 "Elan sample query result %02x, %02x, %02x\n",
1726 if (info
->pattern
> 0x00 && info
->ic_version
== 0xf) {
1727 if (info
->send_cmd(psmouse
, ETP_ICBODY_QUERY
, ic_body
)) {
1728 psmouse_err(psmouse
, "failed to query ic body\n");
1731 info
->ic_version
= be16_to_cpup((__be16
*)ic_body
);
1732 psmouse_info(psmouse
,
1733 "Elan ic body: %#04x, current fw version: %#02x\n",
1734 info
->ic_version
, ic_body
[2]);
1737 info
->product_id
= be16_to_cpup((__be16
*)info
->samples
);
1738 if (info
->pattern
== 0x00)
1739 info
->product_id
&= 0xff;
1741 if (info
->samples
[1] == 0x74 && info
->hw_version
== 0x03) {
1743 * This module has a bug which makes absolute mode
1744 * unusable, so let's abort so we'll be using standard
1747 psmouse_info(psmouse
,
1748 "absolute mode broken, forcing standard PS/2 protocol\n");
1752 /* The MSB indicates the presence of the trackpoint */
1753 info
->has_trackpoint
= (info
->capabilities
[0] & 0x80) == 0x80;
1755 if (info
->has_trackpoint
&& info
->ic_version
== 0x0011 &&
1756 (info
->product_id
== 0x08 || info
->product_id
== 0x09 ||
1757 info
->product_id
== 0x0d || info
->product_id
== 0x0e)) {
1759 * This module has a bug which makes trackpoint in SMBus
1760 * mode return invalid data unless trackpoint is switched
1761 * from using 0x5e reports to 0x5f. If we are not able to
1762 * make the switch, let's abort initialization so we'll be
1763 * using standard PS/2 protocol.
1765 if (elantech_change_report_id(psmouse
)) {
1766 psmouse_info(psmouse
,
1767 "Trackpoint report is broken, forcing standard PS/2 protocol\n");
1774 if (info
->hw_version
== 4) {
1775 if (elantech_get_resolution_v4(psmouse
,
1779 psmouse_warn(psmouse
,
1780 "failed to query resolution data.\n");
1784 /* query range information */
1785 switch (info
->hw_version
) {
1787 info
->x_min
= ETP_XMIN_V1
;
1788 info
->y_min
= ETP_YMIN_V1
;
1789 info
->x_max
= ETP_XMAX_V1
;
1790 info
->y_max
= ETP_YMAX_V1
;
1794 if (info
->fw_version
== 0x020800 ||
1795 info
->fw_version
== 0x020b00 ||
1796 info
->fw_version
== 0x020030) {
1797 info
->x_min
= ETP_XMIN_V2
;
1798 info
->y_min
= ETP_YMIN_V2
;
1799 info
->x_max
= ETP_XMAX_V2
;
1800 info
->y_max
= ETP_YMAX_V2
;
1805 i
= (info
->fw_version
> 0x020800 &&
1806 info
->fw_version
< 0x020900) ? 1 : 2;
1808 if (info
->send_cmd(psmouse
, ETP_FW_ID_QUERY
, param
))
1811 fixed_dpi
= param
[1] & 0x10;
1813 if (((info
->fw_version
>> 16) == 0x14) && fixed_dpi
) {
1814 if (info
->send_cmd(psmouse
, ETP_SAMPLE_QUERY
, param
))
1817 info
->x_max
= (info
->capabilities
[1] - i
) * param
[1] / 2;
1818 info
->y_max
= (info
->capabilities
[2] - i
) * param
[2] / 2;
1819 } else if (info
->fw_version
== 0x040216) {
1822 } else if (info
->fw_version
== 0x040219 || info
->fw_version
== 0x040215) {
1826 info
->x_max
= (info
->capabilities
[1] - i
) * 64;
1827 info
->y_max
= (info
->capabilities
[2] - i
) * 64;
1833 if (info
->send_cmd(psmouse
, ETP_FW_ID_QUERY
, param
))
1836 info
->x_max
= (0x0f & param
[0]) << 8 | param
[1];
1837 info
->y_max
= (0xf0 & param
[0]) << 4 | param
[2];
1841 if (info
->send_cmd(psmouse
, ETP_FW_ID_QUERY
, param
))
1844 info
->x_max
= (0x0f & param
[0]) << 8 | param
[1];
1845 info
->y_max
= (0xf0 & param
[0]) << 4 | param
[2];
1846 traces
= info
->capabilities
[1];
1847 if ((traces
< 2) || (traces
> info
->x_max
))
1850 info
->width
= info
->x_max
/ (traces
- 1);
1852 /* column number of traces */
1853 info
->x_traces
= traces
;
1855 /* row number of traces */
1856 traces
= info
->capabilities
[2];
1857 if ((traces
>= 2) && (traces
<= info
->y_max
))
1858 info
->y_traces
= traces
;
1863 /* check for the middle button: DMI matching or new v4 firmwares */
1864 info
->has_middle_button
= dmi_check_system(elantech_dmi_has_middle_button
) ||
1865 (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info
->fw_version
) &&
1866 !elantech_is_buttonpad(info
));
1871 #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)
1874 * The newest Elantech device can use a secondary bus (over SMBus) which
1875 * provides a better bandwidth and allow a better control of the touchpads.
1876 * This is used to decide if we need to use this bus or not.
1879 ELANTECH_SMBUS_NOT_SET
= -1,
1884 static int elantech_smbus
= IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS
) ?
1885 ELANTECH_SMBUS_NOT_SET
: ELANTECH_SMBUS_OFF
;
1886 module_param_named(elantech_smbus
, elantech_smbus
, int, 0644);
1887 MODULE_PARM_DESC(elantech_smbus
, "Use a secondary bus for the Elantech device.");
1889 static const char * const i2c_blacklist_pnp_ids
[] = {
1891 * These are known to not be working properly as bits are missing
1897 static int elantech_create_smbus(struct psmouse
*psmouse
,
1898 struct elantech_device_info
*info
,
1899 bool leave_breadcrumbs
)
1901 struct property_entry i2c_props
[11] = {};
1902 struct i2c_board_info smbus_board
= {
1903 I2C_BOARD_INFO("elan_i2c", 0x15),
1904 .flags
= I2C_CLIENT_HOST_NOTIFY
,
1906 unsigned int idx
= 0;
1908 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("touchscreen-size-x",
1910 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("touchscreen-size-y",
1912 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("touchscreen-min-x",
1914 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("touchscreen-min-y",
1917 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("touchscreen-x-mm",
1918 (info
->x_max
+ 1) / info
->x_res
);
1920 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("touchscreen-y-mm",
1921 (info
->y_max
+ 1) / info
->y_res
);
1923 if (info
->has_trackpoint
)
1924 i2c_props
[idx
++] = PROPERTY_ENTRY_BOOL("elan,trackpoint");
1926 if (info
->has_middle_button
)
1927 i2c_props
[idx
++] = PROPERTY_ENTRY_BOOL("elan,middle-button");
1930 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("elan,x_traces",
1933 i2c_props
[idx
++] = PROPERTY_ENTRY_U32("elan,y_traces",
1936 if (elantech_is_buttonpad(info
))
1937 i2c_props
[idx
++] = PROPERTY_ENTRY_BOOL("elan,clickpad");
1939 smbus_board
.fwnode
= fwnode_create_software_node(i2c_props
, NULL
);
1940 if (IS_ERR(smbus_board
.fwnode
))
1941 return PTR_ERR(smbus_board
.fwnode
);
1943 return psmouse_smbus_init(psmouse
, &smbus_board
, NULL
, 0, false,
1948 * elantech_setup_smbus - called once the PS/2 devices are enumerated
1949 * and decides to instantiate a SMBus InterTouch device.
1951 static int elantech_setup_smbus(struct psmouse
*psmouse
,
1952 struct elantech_device_info
*info
,
1953 bool leave_breadcrumbs
)
1957 if (elantech_smbus
== ELANTECH_SMBUS_OFF
)
1960 if (elantech_smbus
== ELANTECH_SMBUS_NOT_SET
) {
1962 * New ICs are enabled by default, unless mentioned in
1963 * i2c_blacklist_pnp_ids.
1964 * Old ICs are up to the user to decide.
1966 if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info
->fw_version
) ||
1967 psmouse_matches_pnp_id(psmouse
, i2c_blacklist_pnp_ids
))
1971 psmouse_info(psmouse
, "Trying to set up SMBus access\n");
1973 error
= elantech_create_smbus(psmouse
, info
, leave_breadcrumbs
);
1975 if (error
== -EAGAIN
)
1976 psmouse_info(psmouse
, "SMbus companion is not ready yet\n");
1978 psmouse_err(psmouse
, "unable to create intertouch device\n");
1986 static bool elantech_use_host_notify(struct psmouse
*psmouse
,
1987 struct elantech_device_info
*info
)
1989 if (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info
->fw_version
))
1992 switch (info
->bus
) {
1993 case ETP_BUS_PS2_ONLY
:
1996 case ETP_BUS_SMB_ALERT_ONLY
:
1997 case ETP_BUS_PS2_SMB_ALERT
:
1998 psmouse_dbg(psmouse
, "Ignoring SMBus provider through alert protocol.\n");
2000 case ETP_BUS_SMB_HST_NTFY_ONLY
:
2001 case ETP_BUS_PS2_SMB_HST_NTFY
:
2004 psmouse_dbg(psmouse
,
2005 "Ignoring SMBus bus provider %d.\n",
2012 int elantech_init_smbus(struct psmouse
*psmouse
)
2014 struct elantech_device_info info
;
2017 psmouse_reset(psmouse
);
2019 error
= elantech_query_info(psmouse
, &info
);
2023 if (info
.hw_version
< 4) {
2028 return elantech_create_smbus(psmouse
, &info
, false);
2030 psmouse_reset(psmouse
);
2033 #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */
2036 * Initialize the touchpad and create sysfs entries
2038 static int elantech_setup_ps2(struct psmouse
*psmouse
,
2039 struct elantech_device_info
*info
)
2041 struct elantech_data
*etd
;
2043 int error
= -EINVAL
;
2044 struct input_dev
*tp_dev
;
2046 psmouse
->private = etd
= kzalloc(sizeof(*etd
), GFP_KERNEL
);
2053 for (i
= 1; i
< 256; i
++)
2054 etd
->parity
[i
] = etd
->parity
[i
& (i
- 1)] ^ 1;
2056 if (elantech_set_absolute_mode(psmouse
)) {
2057 psmouse_err(psmouse
,
2058 "failed to put touchpad into absolute mode.\n");
2062 if (info
->fw_version
== 0x381f17) {
2063 etd
->original_set_rate
= psmouse
->set_rate
;
2064 psmouse
->set_rate
= elantech_set_rate_restore_reg_07
;
2067 if (elantech_set_input_params(psmouse
)) {
2068 psmouse_err(psmouse
, "failed to query touchpad range.\n");
2072 error
= sysfs_create_group(&psmouse
->ps2dev
.serio
->dev
.kobj
,
2073 &elantech_attr_group
);
2075 psmouse_err(psmouse
,
2076 "failed to create sysfs attributes, error: %d.\n",
2081 if (info
->has_trackpoint
) {
2082 tp_dev
= input_allocate_device();
2086 goto init_fail_tp_alloc
;
2089 etd
->tp_dev
= tp_dev
;
2090 snprintf(etd
->tp_phys
, sizeof(etd
->tp_phys
), "%s/input1",
2091 psmouse
->ps2dev
.serio
->phys
);
2092 tp_dev
->phys
= etd
->tp_phys
;
2093 tp_dev
->name
= "ETPS/2 Elantech TrackPoint";
2094 tp_dev
->id
.bustype
= BUS_I8042
;
2095 tp_dev
->id
.vendor
= 0x0002;
2096 tp_dev
->id
.product
= PSMOUSE_ELANTECH
;
2097 tp_dev
->id
.version
= 0x0000;
2098 tp_dev
->dev
.parent
= &psmouse
->ps2dev
.serio
->dev
;
2099 tp_dev
->evbit
[0] = BIT_MASK(EV_KEY
) | BIT_MASK(EV_REL
);
2100 tp_dev
->relbit
[BIT_WORD(REL_X
)] =
2101 BIT_MASK(REL_X
) | BIT_MASK(REL_Y
);
2102 tp_dev
->keybit
[BIT_WORD(BTN_LEFT
)] =
2103 BIT_MASK(BTN_LEFT
) | BIT_MASK(BTN_MIDDLE
) |
2104 BIT_MASK(BTN_RIGHT
);
2106 __set_bit(INPUT_PROP_POINTER
, tp_dev
->propbit
);
2107 __set_bit(INPUT_PROP_POINTING_STICK
, tp_dev
->propbit
);
2109 error
= input_register_device(etd
->tp_dev
);
2111 goto init_fail_tp_reg
;
2114 psmouse
->protocol_handler
= elantech_process_byte
;
2115 psmouse
->disconnect
= elantech_disconnect
;
2116 psmouse
->reconnect
= elantech_reconnect
;
2117 psmouse
->pktsize
= info
->hw_version
> 1 ? 6 : 4;
2121 input_free_device(tp_dev
);
2123 sysfs_remove_group(&psmouse
->ps2dev
.serio
->dev
.kobj
,
2124 &elantech_attr_group
);
2130 int elantech_init_ps2(struct psmouse
*psmouse
)
2132 struct elantech_device_info info
;
2135 psmouse_reset(psmouse
);
2137 error
= elantech_query_info(psmouse
, &info
);
2141 error
= elantech_setup_ps2(psmouse
, &info
);
2147 psmouse_reset(psmouse
);
2151 int elantech_init(struct psmouse
*psmouse
)
2153 struct elantech_device_info info
;
2156 psmouse_reset(psmouse
);
2158 error
= elantech_query_info(psmouse
, &info
);
2162 #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)
2164 if (elantech_use_host_notify(psmouse
, &info
)) {
2165 if (!IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS
) ||
2166 !IS_ENABLED(CONFIG_MOUSE_PS2_ELANTECH_SMBUS
)) {
2167 psmouse_warn(psmouse
,
2168 "The touchpad can support a better bus than the too old PS/2 protocol. "
2169 "Make sure MOUSE_PS2_ELANTECH_SMBUS and MOUSE_ELAN_I2C_SMBUS are enabled to get a better touchpad experience.\n");
2171 error
= elantech_setup_smbus(psmouse
, &info
, true);
2173 return PSMOUSE_ELANTECH_SMBUS
;
2176 #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */
2178 error
= elantech_setup_ps2(psmouse
, &info
);
2181 * Not using any flavor of Elantech support, so clean up
2182 * SMbus breadcrumbs, if any.
2184 psmouse_smbus_cleanup(psmouse
);
2188 return PSMOUSE_ELANTECH
;
2190 psmouse_reset(psmouse
);