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Input: psmouse - add support for Elantech touchpads
[deliverable/linux.git] / drivers / input / mouse / elantech.c
CommitLineData
2a0bd75e
AO		 1/*
2 * Elantech Touchpad driver (v5)
3 *
4 * Copyright (C) 2007-2008 Arjan Opmeer <arjan@opmeer.net>
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>
14#include <linux/module.h>
15#include <linux/input.h>
16#include <linux/serio.h>
17#include <linux/libps2.h>
18#include "psmouse.h"
19#include "elantech.h"
20
21#define elantech_debug(format, arg...) \
22 do { \
23 if (etd->debug) \
24 printk(KERN_DEBUG format, ##arg); \
25 } while (0)
26
27/*
28 * Send a Synaptics style sliced query command
29 */
30static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
31 unsigned char *param)
32{
33 if (psmouse_sliced_command(psmouse, c) ||
34 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
35 pr_err("elantech.c: synaptics_send_cmd query 0x%02x failed.\n", c);
36 return -1;
37 }
38
39 return 0;
40}
41
42/*
43 * A retrying version of ps2_command
44 */
45static int elantech_ps2_command(struct psmouse *psmouse,
46 unsigned char *param, int command)
47{
48 struct ps2dev *ps2dev = &psmouse->ps2dev;
49 struct elantech_data *etd = psmouse->private;
50 int rc;
51 int tries = ETP_PS2_COMMAND_TRIES;
52
53 do {
54 rc = ps2_command(ps2dev, param, command);
55 if (rc == 0)
56 break;
57 tries--;
58 elantech_debug("elantech.c: retrying ps2 command 0x%02x (%d).\n",
59 command, tries);
60 msleep(ETP_PS2_COMMAND_DELAY);
61 } while (tries > 0);
62
63 if (rc)
64 pr_err("elantech.c: ps2 command 0x%02x failed.\n", command);
65
66 return rc;
67}
68
69/*
70 * Send an Elantech style special command to read a value from a register
71 */
72static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
73 unsigned char *val)
74{
75 struct elantech_data *etd = psmouse->private;
76 unsigned char param[3];
77 int rc = 0;
78
79 if (reg < 0x10 || reg > 0x26)
80 return -1;
81
82 if (reg > 0x11 && reg < 0x20)
83 return -1;
84
85 switch (etd->hw_version) {
86 case 1:
87 if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) ||
88 psmouse_sliced_command(psmouse, reg) ||
89 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
90 rc = -1;
91 }
92 break;
93
94 case 2:
95 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
96 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) ||
97 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
98 elantech_ps2_command(psmouse, NULL, reg) ||
99 elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
100 rc = -1;
101 }
102 break;
103 }
104
105 if (rc)
106 pr_err("elantech.c: failed to read register 0x%02x.\n", reg);
107 else
108 *val = param[0];
109
110 return rc;
111}
112
113/*
114 * Send an Elantech style special command to write a register with a value
115 */
116static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
117 unsigned char val)
118{
119 struct elantech_data *etd = psmouse->private;
120 int rc = 0;
121
122 if (reg < 0x10 || reg > 0x26)
123 return -1;
124
125 if (reg > 0x11 && reg < 0x20)
126 return -1;
127
128 switch (etd->hw_version) {
129 case 1:
130 if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) ||
131 psmouse_sliced_command(psmouse, reg) ||
132 psmouse_sliced_command(psmouse, val) ||
133 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
134 rc = -1;
135 }
136 break;
137
138 case 2:
139 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
140 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) ||
141 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
142 elantech_ps2_command(psmouse, NULL, reg) ||
143 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
144 elantech_ps2_command(psmouse, NULL, val) ||
145 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
146 rc = -1;
147 }
148 break;
149 }
150
151 if (rc)
152 pr_err("elantech.c: failed to write register 0x%02x with value 0x%02x.\n",
153 reg, val);
154
155 return rc;
156}
157
158/*
159 * Dump a complete mouse movement packet to the syslog
160 */
161static void elantech_packet_dump(unsigned char *packet, int size)
162{
163 int i;
164
165 printk(KERN_DEBUG "elantech.c: PS/2 packet [");
166 for (i = 0; i < size; i++)
167 printk("%s0x%02x ", (i) ? ", " : " ", packet[i]);
168 printk("]\n");
169}
170
171/*
172 * Interpret complete data packets and report absolute mode input events for
173 * hardware version 1. (4 byte packets)
174 */
175static void elantech_report_absolute_v1(struct psmouse *psmouse)
176{
177 struct input_dev *dev = psmouse->dev;
178 struct elantech_data *etd = psmouse->private;
179 unsigned char *packet = psmouse->packet;
180 int fingers;
181
182 if (etd->fw_version_maj == 0x01) {
183 /* byte 0: D U p1 p2 1 p3 R L
184 byte 1: f 0 th tw x9 x8 y9 y8 */
185 fingers = ((packet[1] & 0x80) >> 7) +
186 ((packet[1] & 0x30) >> 4);
187 } else {
188 /* byte 0: n1 n0 p2 p1 1 p3 R L
189 byte 1: 0 0 0 0 x9 x8 y9 y8 */
190 fingers = (packet[0] & 0xc0) >> 6;
191 }
192
193 input_report_key(dev, BTN_TOUCH, fingers != 0);
194
195 /* byte 2: x7 x6 x5 x4 x3 x2 x1 x0
196 byte 3: y7 y6 y5 y4 y3 y2 y1 y0 */
197 if (fingers) {
198 input_report_abs(dev, ABS_X,
199 ((packet[1] & 0x0c) << 6) | packet[2]);
200 input_report_abs(dev, ABS_Y, ETP_YMAX_V1 -
201 (((packet[1] & 0x03) << 8) | packet[3]));
202 }
203
204 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
205 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
206 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
207 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
208 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
209
210 if ((etd->fw_version_maj == 0x01) &&
211 (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
212 /* rocker up */
213 input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
214 /* rocker down */
215 input_report_key(dev, BTN_BACK, packet[0] & 0x80);
216 }
217
218 input_sync(dev);
219}
220
221/*
222 * Interpret complete data packets and report absolute mode input events for
223 * hardware version 2. (6 byte packets)
224 */
225static void elantech_report_absolute_v2(struct psmouse *psmouse)
226{
227 struct input_dev *dev = psmouse->dev;
228 unsigned char *packet = psmouse->packet;
229 int fingers, x1, y1, x2, y2;
230
231 /* byte 0: n1 n0 . . . . R L */
232 fingers = (packet[0] & 0xc0) >> 6;
233 input_report_key(dev, BTN_TOUCH, fingers != 0);
234
235 switch (fingers) {
236 case 1:
237 /* byte 1: x15 x14 x13 x12 x11 x10 x9 x8
238 byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */
239 input_report_abs(dev, ABS_X, (packet[1] << 8) | packet[2]);
240 /* byte 4: y15 y14 y13 y12 y11 y10 y8 y8
241 byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */
242 input_report_abs(dev, ABS_Y, ETP_YMAX_V2 -
243 ((packet[4] << 8) | packet[5]));
244 break;
245
246 case 2:
247 /* The coordinate of each finger is reported separately with
248 a lower resolution for two finger touches */
249 /* byte 0: . . ay8 ax8 . . . .
250 byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */
251 x1 = ((packet[0] & 0x10) << 4) | packet[1];
252 /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
253 y1 = ETP_2FT_YMAX - (((packet[0] & 0x20) << 3) | packet[2]);
254 /* byte 3: . . by8 bx8 . . . .
255 byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 */
256 x2 = ((packet[3] & 0x10) << 4) | packet[4];
257 /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
258 y2 = ETP_2FT_YMAX - (((packet[3] & 0x20) << 3) | packet[5]);
259 /* For compatibility with the X Synaptics driver scale up one
260 coordinate and report as ordinary mouse movent */
261 input_report_abs(dev, ABS_X, x1 << 2);
262 input_report_abs(dev, ABS_Y, y1 << 2);
263 /* For compatibility with the proprietary X Elantech driver
264 report both coordinates as hat coordinates */
265 input_report_abs(dev, ABS_HAT0X, x1);
266 input_report_abs(dev, ABS_HAT0Y, y1);
267 input_report_abs(dev, ABS_HAT1X, x2);
268 input_report_abs(dev, ABS_HAT1Y, y2);
269 break;
270 }
271
272 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
273 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
274 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
275 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
276 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
277
278 input_sync(dev);
279}
280
281static int elantech_check_parity_v1(struct psmouse *psmouse)
282{
283 struct elantech_data *etd = psmouse->private;
284 unsigned char *packet = psmouse->packet;
285 unsigned char p1, p2, p3;
286
287 /* Parity bits are placed differently */
288 if (etd->fw_version_maj == 0x01) {
289 /* byte 0: D U p1 p2 1 p3 R L */
290 p1 = (packet[0] & 0x20) >> 5;
291 p2 = (packet[0] & 0x10) >> 4;
292 } else {
293 /* byte 0: n1 n0 p2 p1 1 p3 R L */
294 p1 = (packet[0] & 0x10) >> 4;
295 p2 = (packet[0] & 0x20) >> 5;
296 }
297
298 p3 = (packet[0] & 0x04) >> 2;
299
300 return etd->parity[packet[1]] == p1 &&
301 etd->parity[packet[2]] == p2 &&
302 etd->parity[packet[3]] == p3;
303}
304
305/*
306 * Process byte stream from mouse and handle complete packets
307 */
308static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
309{
310 struct elantech_data *etd = psmouse->private;
311
312 if (psmouse->pktcnt < psmouse->pktsize)
313 return PSMOUSE_GOOD_DATA;
314
315 if (etd->debug > 1)
316 elantech_packet_dump(psmouse->packet, psmouse->pktsize);
317
318 switch (etd->hw_version) {
319 case 1:
320 if (etd->paritycheck && !elantech_check_parity_v1(psmouse))
321 return PSMOUSE_BAD_DATA;
322
323 elantech_report_absolute_v1(psmouse);
324 break;
325
326 case 2:
327 /* We don't know how to check parity in protocol v2 */
328 elantech_report_absolute_v2(psmouse);
329 break;
330 }
331
332 return PSMOUSE_FULL_PACKET;
333}
334
335/*
336 * Put the touchpad into absolute mode
337 */
338static int elantech_set_absolute_mode(struct psmouse *psmouse)
339{
340 struct elantech_data *etd = psmouse->private;
341 unsigned char val;
342 int tries = ETP_READ_BACK_TRIES;
343 int rc = 0;
344
345 switch (etd->hw_version) {
346 case 1:
347 etd->reg_10 = 0x16;
348 etd->reg_11 = 0x8f;
349 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
350 elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
351 rc = -1;
352 }
353 break;
354
355 case 2:
356 /* Windows driver values */
357 etd->reg_10 = 0x54;
358 etd->reg_11 = 0x88; /* 0x8a */
359 etd->reg_21 = 0x60; /* 0x00 */
360 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
361 elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
362 elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
363 rc = -1;
364 break;
365 }
366 /*
367 * Read back reg 0x10. The touchpad is probably initalising
368 * and not ready until we read back the value we just wrote.
369 */
370 do {
371 rc = elantech_read_reg(psmouse, 0x10, &val);
372 if (rc == 0)
373 break;
374 tries--;
375 elantech_debug("elantech.c: retrying read (%d).\n",
376 tries);
377 msleep(ETP_READ_BACK_DELAY);
378 } while (tries > 0);
379 if (rc)
380 pr_err("elantech.c: failed to read back register 0x10.\n");
381 break;
382 }
383
384 if (rc)
385 pr_err("elantech.c: failed to initialise registers.\n");
386
387 return rc;
388}
389
390/*
391 * Set the appropriate event bits for the input subsystem
392 */
393static void elantech_set_input_params(struct psmouse *psmouse)
394{
395 struct input_dev *dev = psmouse->dev;
396 struct elantech_data *etd = psmouse->private;
397
398 __set_bit(EV_KEY, dev->evbit);
399 __set_bit(EV_ABS, dev->evbit);
400
401 __set_bit(BTN_LEFT, dev->keybit);
402 __set_bit(BTN_RIGHT, dev->keybit);
403
404 __set_bit(BTN_TOUCH, dev->keybit);
405 __set_bit(BTN_TOOL_FINGER, dev->keybit);
406 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
407 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
408
409 switch (etd->hw_version) {
410 case 1:
411 /* Rocker button */
412 if ((etd->fw_version_maj == 0x01) &&
413 (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
414 __set_bit(BTN_FORWARD, dev->keybit);
415 __set_bit(BTN_BACK, dev->keybit);
416 }
417 input_set_abs_params(dev, ABS_X, ETP_XMIN_V1, ETP_XMAX_V1, 0, 0);
418 input_set_abs_params(dev, ABS_Y, ETP_YMIN_V1, ETP_YMAX_V1, 0, 0);
419 break;
420
421 case 2:
422 input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
423 input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
424 input_set_abs_params(dev, ABS_HAT0X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
425 input_set_abs_params(dev, ABS_HAT0Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
426 input_set_abs_params(dev, ABS_HAT1X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
427 input_set_abs_params(dev, ABS_HAT1Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
428 break;
429 }
430}
431
432struct elantech_attr_data {
433 size_t field_offset;
434 unsigned char reg;
435};
436
437/*
438 * Display a register value by reading a sysfs entry
439 */
440static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
441 char *buf)
442{
443 struct elantech_data *etd = psmouse->private;
444 struct elantech_attr_data *attr = data;
445 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
446 int rc = 0;
447
448 if (attr->reg)
449 rc = elantech_read_reg(psmouse, attr->reg, reg);
450
451 return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
452}
453
454/*
455 * Write a register value by writing a sysfs entry
456 */
457static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
458 void *data, const char *buf, size_t count)
459{
460 struct elantech_data *etd = psmouse->private;
461 struct elantech_attr_data *attr = data;
462 unsigned char *reg = (unsigned char *) etd + attr->field_offset;
463 unsigned long value;
464 int err;
465
466 err = strict_strtoul(buf, 16, &value);
467 if (err)
468 return err;
469
470 if (value > 0xff)
471 return -EINVAL;
472
473 /* Do we need to preserve some bits for version 2 hardware too? */
474 if (etd->hw_version == 1) {
475 if (attr->reg == 0x10)
476 /* Force absolute mode always on */
477 value |= ETP_R10_ABSOLUTE_MODE;
478 else if (attr->reg == 0x11)
479 /* Force 4 byte mode always on */
480 value |= ETP_R11_4_BYTE_MODE;
481 }
482
483 if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
484 *reg = value;
485
486 return count;
487}
488
489#define ELANTECH_INT_ATTR(_name, _register) \
490 static struct elantech_attr_data elantech_attr_##_name = { \
491 .field_offset = offsetof(struct elantech_data, _name), \
492 .reg = _register, \
493 }; \
494 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
495 &elantech_attr_##_name, \
496 elantech_show_int_attr, \
497 elantech_set_int_attr)
498
499ELANTECH_INT_ATTR(reg_10, 0x10);
500ELANTECH_INT_ATTR(reg_11, 0x11);
501ELANTECH_INT_ATTR(reg_20, 0x20);
502ELANTECH_INT_ATTR(reg_21, 0x21);
503ELANTECH_INT_ATTR(reg_22, 0x22);
504ELANTECH_INT_ATTR(reg_23, 0x23);
505ELANTECH_INT_ATTR(reg_24, 0x24);
506ELANTECH_INT_ATTR(reg_25, 0x25);
507ELANTECH_INT_ATTR(reg_26, 0x26);
508ELANTECH_INT_ATTR(debug, 0);
509ELANTECH_INT_ATTR(paritycheck, 0);
510
511static struct attribute *elantech_attrs[] = {
512 &psmouse_attr_reg_10.dattr.attr,
513 &psmouse_attr_reg_11.dattr.attr,
514 &psmouse_attr_reg_20.dattr.attr,
515 &psmouse_attr_reg_21.dattr.attr,
516 &psmouse_attr_reg_22.dattr.attr,
517 &psmouse_attr_reg_23.dattr.attr,
518 &psmouse_attr_reg_24.dattr.attr,
519 &psmouse_attr_reg_25.dattr.attr,
520 &psmouse_attr_reg_26.dattr.attr,
521 &psmouse_attr_debug.dattr.attr,
522 &psmouse_attr_paritycheck.dattr.attr,
523 NULL
524};
525
526static struct attribute_group elantech_attr_group = {
527 .attrs = elantech_attrs,
528};
529
530/*
531 * Use magic knock to detect Elantech touchpad
532 */
533int elantech_detect(struct psmouse *psmouse, int set_properties)
534{
535 struct ps2dev *ps2dev = &psmouse->ps2dev;
536 unsigned char param[3];
537
538 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
539
540 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
541 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
542 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
543 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
544 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
545 pr_err("elantech.c: sending Elantech magic knock failed.\n");
546 return -1;
547 }
548
549 /*
550 * Report this in case there are Elantech models that use a different
551 * set of magic numbers
552 */
553 if (param[0] != 0x3c || param[1] != 0x03 || param[2] != 0xc8) {
554 pr_info("elantech.c: unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
555 param[0], param[1], param[2]);
556 return -1;
557 }
558
559 if (set_properties) {
560 psmouse->vendor = "Elantech";
561 psmouse->name = "Touchpad";
562 }
563
564 return 0;
565}
566
567/*
568 * Clean up sysfs entries when disconnecting
569 */
570static void elantech_disconnect(struct psmouse *psmouse)
571{
572 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
573 &elantech_attr_group);
574 kfree(psmouse->private);
575 psmouse->private = NULL;
576}
577
578/*
579 * Put the touchpad back into absolute mode when reconnecting
580 */
581static int elantech_reconnect(struct psmouse *psmouse)
582{
583 if (elantech_detect(psmouse, 0))
584 return -1;
585
586 if (elantech_set_absolute_mode(psmouse)) {
587 pr_err("elantech.c: failed to put touchpad back into absolute mode.\n");
588 return -1;
589 }
590
591 return 0;
592}
593
594/*
595 * Initialize the touchpad and create sysfs entries
596 */
597int elantech_init(struct psmouse *psmouse)
598{
599 struct elantech_data *etd;
600 int i, error;
601 unsigned char param[3];
602
603 etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
604 psmouse->private = etd;
605 if (!etd)
606 return -1;
607
608 etd->parity[0] = 1;
609 for (i = 1; i < 256; i++)
610 etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
611
612 /*
613 * Find out what version hardware this is
614 */
615 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
616 pr_err("elantech.c: failed to query firmware version.\n");
617 goto init_fail;
618 }
619 pr_info("elantech.c: Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
620 param[0], param[1], param[2]);
621 etd->fw_version_maj = param[0];
622 etd->fw_version_min = param[2];
623
624 /*
625 * Assume every version greater than this is new EeePC style
626 * hardware with 6 byte packets
627 */
628 if (etd->fw_version_maj >= 0x02 && etd->fw_version_min >= 0x30) {
629 etd->hw_version = 2;
630 /* For now show extra debug information */
631 etd->debug = 1;
632 /* Don't know how to do parity checking for version 2 */
633 etd->paritycheck = 0;
634 } else {
635 etd->hw_version = 1;
636 etd->paritycheck = 1;
637 }
638 pr_info("elantech.c: assuming hardware version %d, firmware version %d.%d\n",
639 etd->hw_version, etd->fw_version_maj, etd->fw_version_min);
640
641 if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, param)) {
642 pr_err("elantech.c: failed to query capabilities.\n");
643 goto init_fail;
644 }
645 pr_info("elantech.c: Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
646 param[0], param[1], param[2]);
647 etd->capabilities = param[0];
648
649 if (elantech_set_absolute_mode(psmouse)) {
650 pr_err("elantech.c: failed to put touchpad into absolute mode.\n");
651 goto init_fail;
652 }
653
654 elantech_set_input_params(psmouse);
655
656 error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
657 &elantech_attr_group);
658 if (error) {
659 pr_err("elantech.c: failed to create sysfs attributes, error: %d.\n",
660 error);
661 goto init_fail;
662 }
663
664 psmouse->protocol_handler = elantech_process_byte;
665 psmouse->disconnect = elantech_disconnect;
666 psmouse->reconnect = elantech_reconnect;
667 psmouse->pktsize = etd->hw_version == 2 ? 6 : 4;
668
669 return 0;
670
671 init_fail:
672 kfree(etd);
673 return -1;
674}
Linux kernel - Deliverables
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