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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 | */ | |
30 | static 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 | */ | |
45 | static 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 | */ | |
72 | static 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 | */ | |
116 | static 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 | */ | |
161 | static 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 | */ | |
175 | static 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 | */ | |
225 | static 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 | ||
281 | static 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 | */ | |
308 | static 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 | */ | |
338 | static 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 | */ | |
393 | static 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 | ||
432 | struct 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 | */ | |
440 | static 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 | */ | |
457 | static 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 | ||
499 | ELANTECH_INT_ATTR(reg_10, 0x10); | |
500 | ELANTECH_INT_ATTR(reg_11, 0x11); | |
501 | ELANTECH_INT_ATTR(reg_20, 0x20); | |
502 | ELANTECH_INT_ATTR(reg_21, 0x21); | |
503 | ELANTECH_INT_ATTR(reg_22, 0x22); | |
504 | ELANTECH_INT_ATTR(reg_23, 0x23); | |
505 | ELANTECH_INT_ATTR(reg_24, 0x24); | |
506 | ELANTECH_INT_ATTR(reg_25, 0x25); | |
507 | ELANTECH_INT_ATTR(reg_26, 0x26); | |
508 | ELANTECH_INT_ATTR(debug, 0); | |
509 | ELANTECH_INT_ATTR(paritycheck, 0); | |
510 | ||
511 | static 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 | ||
526 | static struct attribute_group elantech_attr_group = { | |
527 | .attrs = elantech_attrs, | |
528 | }; | |
529 | ||
530 | /* | |
531 | * Use magic knock to detect Elantech touchpad | |
532 | */ | |
533 | int 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 | */ | |
570 | static 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 | */ | |
581 | static 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 | */ | |
597 | int 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 | } |