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Commit | Line | Data |
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2a0bd75e | 1 | /* |
3f8c0df4 | 2 | * Elantech Touchpad driver (v6) |
2a0bd75e | 3 | * |
3f8c0df4 | 4 | * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> |
2a0bd75e AO |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published | |
8 | * by the Free Software Foundation. | |
9 | * | |
10 | * Trademarks are the property of their respective owners. | |
11 | */ | |
12 | ||
13 | #include <linux/delay.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
2a0bd75e AO |
15 | #include <linux/module.h> |
16 | #include <linux/input.h> | |
17 | #include <linux/serio.h> | |
18 | #include <linux/libps2.h> | |
19 | #include "psmouse.h" | |
20 | #include "elantech.h" | |
21 | ||
22 | #define elantech_debug(format, arg...) \ | |
23 | do { \ | |
24 | if (etd->debug) \ | |
25 | printk(KERN_DEBUG format, ##arg); \ | |
26 | } while (0) | |
27 | ||
28 | /* | |
29 | * Send a Synaptics style sliced query command | |
30 | */ | |
31 | static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, | |
32 | unsigned char *param) | |
33 | { | |
34 | if (psmouse_sliced_command(psmouse, c) || | |
35 | ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
36 | pr_err("elantech.c: synaptics_send_cmd query 0x%02x failed.\n", c); | |
37 | return -1; | |
38 | } | |
39 | ||
40 | return 0; | |
41 | } | |
42 | ||
43 | /* | |
44 | * A retrying version of ps2_command | |
45 | */ | |
46 | static int elantech_ps2_command(struct psmouse *psmouse, | |
47 | unsigned char *param, int command) | |
48 | { | |
49 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
50 | struct elantech_data *etd = psmouse->private; | |
51 | int rc; | |
52 | int tries = ETP_PS2_COMMAND_TRIES; | |
53 | ||
54 | do { | |
55 | rc = ps2_command(ps2dev, param, command); | |
56 | if (rc == 0) | |
57 | break; | |
58 | tries--; | |
59 | elantech_debug("elantech.c: retrying ps2 command 0x%02x (%d).\n", | |
60 | command, tries); | |
61 | msleep(ETP_PS2_COMMAND_DELAY); | |
62 | } while (tries > 0); | |
63 | ||
64 | if (rc) | |
65 | pr_err("elantech.c: ps2 command 0x%02x failed.\n", command); | |
66 | ||
67 | return rc; | |
68 | } | |
69 | ||
70 | /* | |
71 | * Send an Elantech style special command to read a value from a register | |
72 | */ | |
73 | static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, | |
74 | unsigned char *val) | |
75 | { | |
76 | struct elantech_data *etd = psmouse->private; | |
77 | unsigned char param[3]; | |
78 | int rc = 0; | |
79 | ||
80 | if (reg < 0x10 || reg > 0x26) | |
81 | return -1; | |
82 | ||
83 | if (reg > 0x11 && reg < 0x20) | |
84 | return -1; | |
85 | ||
86 | switch (etd->hw_version) { | |
87 | case 1: | |
88 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) || | |
89 | psmouse_sliced_command(psmouse, reg) || | |
90 | ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
91 | rc = -1; | |
92 | } | |
93 | break; | |
94 | ||
95 | case 2: | |
96 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
97 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || | |
98 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
99 | elantech_ps2_command(psmouse, NULL, reg) || | |
100 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { | |
101 | rc = -1; | |
102 | } | |
103 | break; | |
104 | } | |
105 | ||
106 | if (rc) | |
107 | pr_err("elantech.c: failed to read register 0x%02x.\n", reg); | |
108 | else | |
109 | *val = param[0]; | |
110 | ||
111 | return rc; | |
112 | } | |
113 | ||
114 | /* | |
115 | * Send an Elantech style special command to write a register with a value | |
116 | */ | |
117 | static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, | |
118 | unsigned char val) | |
119 | { | |
120 | struct elantech_data *etd = psmouse->private; | |
121 | int rc = 0; | |
122 | ||
123 | if (reg < 0x10 || reg > 0x26) | |
124 | return -1; | |
125 | ||
126 | if (reg > 0x11 && reg < 0x20) | |
127 | return -1; | |
128 | ||
129 | switch (etd->hw_version) { | |
130 | case 1: | |
131 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) || | |
132 | psmouse_sliced_command(psmouse, reg) || | |
133 | psmouse_sliced_command(psmouse, val) || | |
134 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
135 | rc = -1; | |
136 | } | |
137 | break; | |
138 | ||
139 | case 2: | |
140 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
141 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || | |
142 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
143 | elantech_ps2_command(psmouse, NULL, reg) || | |
144 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
145 | elantech_ps2_command(psmouse, NULL, val) || | |
146 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
147 | rc = -1; | |
148 | } | |
149 | break; | |
150 | } | |
151 | ||
152 | if (rc) | |
153 | pr_err("elantech.c: failed to write register 0x%02x with value 0x%02x.\n", | |
154 | reg, val); | |
155 | ||
156 | return rc; | |
157 | } | |
158 | ||
159 | /* | |
160 | * Dump a complete mouse movement packet to the syslog | |
161 | */ | |
162 | static void elantech_packet_dump(unsigned char *packet, int size) | |
163 | { | |
164 | int i; | |
165 | ||
166 | printk(KERN_DEBUG "elantech.c: PS/2 packet ["); | |
167 | for (i = 0; i < size; i++) | |
168 | printk("%s0x%02x ", (i) ? ", " : " ", packet[i]); | |
169 | printk("]\n"); | |
170 | } | |
171 | ||
172 | /* | |
173 | * Interpret complete data packets and report absolute mode input events for | |
174 | * hardware version 1. (4 byte packets) | |
175 | */ | |
176 | static void elantech_report_absolute_v1(struct psmouse *psmouse) | |
177 | { | |
178 | struct input_dev *dev = psmouse->dev; | |
179 | struct elantech_data *etd = psmouse->private; | |
180 | unsigned char *packet = psmouse->packet; | |
181 | int fingers; | |
3f8c0df4 | 182 | static int old_fingers; |
2a0bd75e AO |
183 | |
184 | if (etd->fw_version_maj == 0x01) { | |
185 | /* byte 0: D U p1 p2 1 p3 R L | |
186 | byte 1: f 0 th tw x9 x8 y9 y8 */ | |
187 | fingers = ((packet[1] & 0x80) >> 7) + | |
188 | ((packet[1] & 0x30) >> 4); | |
189 | } else { | |
190 | /* byte 0: n1 n0 p2 p1 1 p3 R L | |
191 | byte 1: 0 0 0 0 x9 x8 y9 y8 */ | |
192 | fingers = (packet[0] & 0xc0) >> 6; | |
193 | } | |
194 | ||
3f8c0df4 AO |
195 | if (etd->jumpy_cursor) { |
196 | /* Discard packets that are likely to have bogus coordinates */ | |
197 | if (fingers > old_fingers) { | |
198 | elantech_debug("elantech.c: discarding packet\n"); | |
199 | goto discard_packet_v1; | |
200 | } | |
201 | } | |
202 | ||
2a0bd75e AO |
203 | input_report_key(dev, BTN_TOUCH, fingers != 0); |
204 | ||
205 | /* byte 2: x7 x6 x5 x4 x3 x2 x1 x0 | |
206 | byte 3: y7 y6 y5 y4 y3 y2 y1 y0 */ | |
207 | if (fingers) { | |
208 | input_report_abs(dev, ABS_X, | |
209 | ((packet[1] & 0x0c) << 6) | packet[2]); | |
210 | input_report_abs(dev, ABS_Y, ETP_YMAX_V1 - | |
211 | (((packet[1] & 0x03) << 8) | packet[3])); | |
212 | } | |
213 | ||
214 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
215 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
216 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
217 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
218 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
219 | ||
220 | if ((etd->fw_version_maj == 0x01) && | |
221 | (etd->capabilities & ETP_CAP_HAS_ROCKER)) { | |
222 | /* rocker up */ | |
223 | input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); | |
224 | /* rocker down */ | |
225 | input_report_key(dev, BTN_BACK, packet[0] & 0x80); | |
226 | } | |
227 | ||
228 | input_sync(dev); | |
3f8c0df4 AO |
229 | |
230 | discard_packet_v1: | |
231 | old_fingers = fingers; | |
2a0bd75e AO |
232 | } |
233 | ||
234 | /* | |
235 | * Interpret complete data packets and report absolute mode input events for | |
236 | * hardware version 2. (6 byte packets) | |
237 | */ | |
238 | static void elantech_report_absolute_v2(struct psmouse *psmouse) | |
239 | { | |
240 | struct input_dev *dev = psmouse->dev; | |
241 | unsigned char *packet = psmouse->packet; | |
242 | int fingers, x1, y1, x2, y2; | |
243 | ||
244 | /* byte 0: n1 n0 . . . . R L */ | |
245 | fingers = (packet[0] & 0xc0) >> 6; | |
246 | input_report_key(dev, BTN_TOUCH, fingers != 0); | |
247 | ||
248 | switch (fingers) { | |
249 | case 1: | |
250 | /* byte 1: x15 x14 x13 x12 x11 x10 x9 x8 | |
251 | byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */ | |
252 | input_report_abs(dev, ABS_X, (packet[1] << 8) | packet[2]); | |
253 | /* byte 4: y15 y14 y13 y12 y11 y10 y8 y8 | |
254 | byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */ | |
255 | input_report_abs(dev, ABS_Y, ETP_YMAX_V2 - | |
256 | ((packet[4] << 8) | packet[5])); | |
257 | break; | |
258 | ||
259 | case 2: | |
260 | /* The coordinate of each finger is reported separately with | |
261 | a lower resolution for two finger touches */ | |
262 | /* byte 0: . . ay8 ax8 . . . . | |
263 | byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */ | |
264 | x1 = ((packet[0] & 0x10) << 4) | packet[1]; | |
265 | /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ | |
266 | y1 = ETP_2FT_YMAX - (((packet[0] & 0x20) << 3) | packet[2]); | |
267 | /* byte 3: . . by8 bx8 . . . . | |
268 | byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 */ | |
269 | x2 = ((packet[3] & 0x10) << 4) | packet[4]; | |
270 | /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ | |
271 | y2 = ETP_2FT_YMAX - (((packet[3] & 0x20) << 3) | packet[5]); | |
272 | /* For compatibility with the X Synaptics driver scale up one | |
273 | coordinate and report as ordinary mouse movent */ | |
274 | input_report_abs(dev, ABS_X, x1 << 2); | |
275 | input_report_abs(dev, ABS_Y, y1 << 2); | |
276 | /* For compatibility with the proprietary X Elantech driver | |
277 | report both coordinates as hat coordinates */ | |
278 | input_report_abs(dev, ABS_HAT0X, x1); | |
279 | input_report_abs(dev, ABS_HAT0Y, y1); | |
280 | input_report_abs(dev, ABS_HAT1X, x2); | |
281 | input_report_abs(dev, ABS_HAT1Y, y2); | |
282 | break; | |
283 | } | |
284 | ||
285 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
286 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
287 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
288 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
289 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
290 | ||
291 | input_sync(dev); | |
292 | } | |
293 | ||
294 | static int elantech_check_parity_v1(struct psmouse *psmouse) | |
295 | { | |
296 | struct elantech_data *etd = psmouse->private; | |
297 | unsigned char *packet = psmouse->packet; | |
298 | unsigned char p1, p2, p3; | |
299 | ||
300 | /* Parity bits are placed differently */ | |
301 | if (etd->fw_version_maj == 0x01) { | |
302 | /* byte 0: D U p1 p2 1 p3 R L */ | |
303 | p1 = (packet[0] & 0x20) >> 5; | |
304 | p2 = (packet[0] & 0x10) >> 4; | |
305 | } else { | |
306 | /* byte 0: n1 n0 p2 p1 1 p3 R L */ | |
307 | p1 = (packet[0] & 0x10) >> 4; | |
308 | p2 = (packet[0] & 0x20) >> 5; | |
309 | } | |
310 | ||
311 | p3 = (packet[0] & 0x04) >> 2; | |
312 | ||
313 | return etd->parity[packet[1]] == p1 && | |
314 | etd->parity[packet[2]] == p2 && | |
315 | etd->parity[packet[3]] == p3; | |
316 | } | |
317 | ||
318 | /* | |
319 | * Process byte stream from mouse and handle complete packets | |
320 | */ | |
321 | static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) | |
322 | { | |
323 | struct elantech_data *etd = psmouse->private; | |
324 | ||
325 | if (psmouse->pktcnt < psmouse->pktsize) | |
326 | return PSMOUSE_GOOD_DATA; | |
327 | ||
328 | if (etd->debug > 1) | |
329 | elantech_packet_dump(psmouse->packet, psmouse->pktsize); | |
330 | ||
331 | switch (etd->hw_version) { | |
332 | case 1: | |
333 | if (etd->paritycheck && !elantech_check_parity_v1(psmouse)) | |
334 | return PSMOUSE_BAD_DATA; | |
335 | ||
336 | elantech_report_absolute_v1(psmouse); | |
337 | break; | |
338 | ||
339 | case 2: | |
340 | /* We don't know how to check parity in protocol v2 */ | |
341 | elantech_report_absolute_v2(psmouse); | |
342 | break; | |
343 | } | |
344 | ||
345 | return PSMOUSE_FULL_PACKET; | |
346 | } | |
347 | ||
348 | /* | |
349 | * Put the touchpad into absolute mode | |
350 | */ | |
351 | static int elantech_set_absolute_mode(struct psmouse *psmouse) | |
352 | { | |
353 | struct elantech_data *etd = psmouse->private; | |
354 | unsigned char val; | |
355 | int tries = ETP_READ_BACK_TRIES; | |
356 | int rc = 0; | |
357 | ||
358 | switch (etd->hw_version) { | |
359 | case 1: | |
360 | etd->reg_10 = 0x16; | |
361 | etd->reg_11 = 0x8f; | |
362 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
363 | elantech_write_reg(psmouse, 0x11, etd->reg_11)) { | |
364 | rc = -1; | |
365 | } | |
366 | break; | |
367 | ||
368 | case 2: | |
369 | /* Windows driver values */ | |
370 | etd->reg_10 = 0x54; | |
371 | etd->reg_11 = 0x88; /* 0x8a */ | |
372 | etd->reg_21 = 0x60; /* 0x00 */ | |
373 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
374 | elantech_write_reg(psmouse, 0x11, etd->reg_11) || | |
375 | elantech_write_reg(psmouse, 0x21, etd->reg_21)) { | |
376 | rc = -1; | |
377 | break; | |
378 | } | |
b2546df6 AO |
379 | } |
380 | ||
381 | if (rc == 0) { | |
2a0bd75e | 382 | /* |
b2546df6 AO |
383 | * Read back reg 0x10. For hardware version 1 we must make |
384 | * sure the absolute mode bit is set. For hardware version 2 | |
385 | * the touchpad is probably initalising and not ready until | |
386 | * we read back the value we just wrote. | |
2a0bd75e AO |
387 | */ |
388 | do { | |
389 | rc = elantech_read_reg(psmouse, 0x10, &val); | |
390 | if (rc == 0) | |
391 | break; | |
392 | tries--; | |
393 | elantech_debug("elantech.c: retrying read (%d).\n", | |
b2546df6 | 394 | tries); |
2a0bd75e AO |
395 | msleep(ETP_READ_BACK_DELAY); |
396 | } while (tries > 0); | |
b2546df6 AO |
397 | |
398 | if (rc) { | |
2a0bd75e | 399 | pr_err("elantech.c: failed to read back register 0x10.\n"); |
b2546df6 AO |
400 | } else if (etd->hw_version == 1 && |
401 | !(val & ETP_R10_ABSOLUTE_MODE)) { | |
402 | pr_err("elantech.c: touchpad refuses " | |
403 | "to switch to absolute mode.\n"); | |
404 | rc = -1; | |
405 | } | |
2a0bd75e AO |
406 | } |
407 | ||
408 | if (rc) | |
409 | pr_err("elantech.c: failed to initialise registers.\n"); | |
410 | ||
411 | return rc; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Set the appropriate event bits for the input subsystem | |
416 | */ | |
417 | static void elantech_set_input_params(struct psmouse *psmouse) | |
418 | { | |
419 | struct input_dev *dev = psmouse->dev; | |
420 | struct elantech_data *etd = psmouse->private; | |
421 | ||
422 | __set_bit(EV_KEY, dev->evbit); | |
423 | __set_bit(EV_ABS, dev->evbit); | |
c7a1f3cc | 424 | __clear_bit(EV_REL, dev->evbit); |
2a0bd75e AO |
425 | |
426 | __set_bit(BTN_LEFT, dev->keybit); | |
427 | __set_bit(BTN_RIGHT, dev->keybit); | |
428 | ||
429 | __set_bit(BTN_TOUCH, dev->keybit); | |
430 | __set_bit(BTN_TOOL_FINGER, dev->keybit); | |
431 | __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); | |
432 | __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); | |
433 | ||
434 | switch (etd->hw_version) { | |
435 | case 1: | |
436 | /* Rocker button */ | |
437 | if ((etd->fw_version_maj == 0x01) && | |
438 | (etd->capabilities & ETP_CAP_HAS_ROCKER)) { | |
439 | __set_bit(BTN_FORWARD, dev->keybit); | |
440 | __set_bit(BTN_BACK, dev->keybit); | |
441 | } | |
442 | input_set_abs_params(dev, ABS_X, ETP_XMIN_V1, ETP_XMAX_V1, 0, 0); | |
443 | input_set_abs_params(dev, ABS_Y, ETP_YMIN_V1, ETP_YMAX_V1, 0, 0); | |
444 | break; | |
445 | ||
446 | case 2: | |
447 | input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0); | |
448 | input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0); | |
449 | input_set_abs_params(dev, ABS_HAT0X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0); | |
450 | input_set_abs_params(dev, ABS_HAT0Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0); | |
451 | input_set_abs_params(dev, ABS_HAT1X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0); | |
452 | input_set_abs_params(dev, ABS_HAT1Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0); | |
453 | break; | |
454 | } | |
455 | } | |
456 | ||
457 | struct elantech_attr_data { | |
458 | size_t field_offset; | |
459 | unsigned char reg; | |
460 | }; | |
461 | ||
462 | /* | |
463 | * Display a register value by reading a sysfs entry | |
464 | */ | |
465 | static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, | |
466 | char *buf) | |
467 | { | |
468 | struct elantech_data *etd = psmouse->private; | |
469 | struct elantech_attr_data *attr = data; | |
470 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
471 | int rc = 0; | |
472 | ||
473 | if (attr->reg) | |
474 | rc = elantech_read_reg(psmouse, attr->reg, reg); | |
475 | ||
476 | return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg); | |
477 | } | |
478 | ||
479 | /* | |
480 | * Write a register value by writing a sysfs entry | |
481 | */ | |
482 | static ssize_t elantech_set_int_attr(struct psmouse *psmouse, | |
483 | void *data, const char *buf, size_t count) | |
484 | { | |
485 | struct elantech_data *etd = psmouse->private; | |
486 | struct elantech_attr_data *attr = data; | |
487 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
488 | unsigned long value; | |
489 | int err; | |
490 | ||
491 | err = strict_strtoul(buf, 16, &value); | |
492 | if (err) | |
493 | return err; | |
494 | ||
495 | if (value > 0xff) | |
496 | return -EINVAL; | |
497 | ||
498 | /* Do we need to preserve some bits for version 2 hardware too? */ | |
499 | if (etd->hw_version == 1) { | |
500 | if (attr->reg == 0x10) | |
501 | /* Force absolute mode always on */ | |
502 | value |= ETP_R10_ABSOLUTE_MODE; | |
503 | else if (attr->reg == 0x11) | |
504 | /* Force 4 byte mode always on */ | |
505 | value |= ETP_R11_4_BYTE_MODE; | |
506 | } | |
507 | ||
508 | if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0) | |
509 | *reg = value; | |
510 | ||
511 | return count; | |
512 | } | |
513 | ||
514 | #define ELANTECH_INT_ATTR(_name, _register) \ | |
515 | static struct elantech_attr_data elantech_attr_##_name = { \ | |
516 | .field_offset = offsetof(struct elantech_data, _name), \ | |
517 | .reg = _register, \ | |
518 | }; \ | |
519 | PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ | |
520 | &elantech_attr_##_name, \ | |
521 | elantech_show_int_attr, \ | |
522 | elantech_set_int_attr) | |
523 | ||
524 | ELANTECH_INT_ATTR(reg_10, 0x10); | |
525 | ELANTECH_INT_ATTR(reg_11, 0x11); | |
526 | ELANTECH_INT_ATTR(reg_20, 0x20); | |
527 | ELANTECH_INT_ATTR(reg_21, 0x21); | |
528 | ELANTECH_INT_ATTR(reg_22, 0x22); | |
529 | ELANTECH_INT_ATTR(reg_23, 0x23); | |
530 | ELANTECH_INT_ATTR(reg_24, 0x24); | |
531 | ELANTECH_INT_ATTR(reg_25, 0x25); | |
532 | ELANTECH_INT_ATTR(reg_26, 0x26); | |
533 | ELANTECH_INT_ATTR(debug, 0); | |
534 | ELANTECH_INT_ATTR(paritycheck, 0); | |
535 | ||
536 | static struct attribute *elantech_attrs[] = { | |
537 | &psmouse_attr_reg_10.dattr.attr, | |
538 | &psmouse_attr_reg_11.dattr.attr, | |
539 | &psmouse_attr_reg_20.dattr.attr, | |
540 | &psmouse_attr_reg_21.dattr.attr, | |
541 | &psmouse_attr_reg_22.dattr.attr, | |
542 | &psmouse_attr_reg_23.dattr.attr, | |
543 | &psmouse_attr_reg_24.dattr.attr, | |
544 | &psmouse_attr_reg_25.dattr.attr, | |
545 | &psmouse_attr_reg_26.dattr.attr, | |
546 | &psmouse_attr_debug.dattr.attr, | |
547 | &psmouse_attr_paritycheck.dattr.attr, | |
548 | NULL | |
549 | }; | |
550 | ||
551 | static struct attribute_group elantech_attr_group = { | |
552 | .attrs = elantech_attrs, | |
553 | }; | |
554 | ||
555 | /* | |
556 | * Use magic knock to detect Elantech touchpad | |
557 | */ | |
b7802c5c | 558 | int elantech_detect(struct psmouse *psmouse, bool set_properties) |
2a0bd75e AO |
559 | { |
560 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
561 | unsigned char param[3]; | |
562 | ||
563 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); | |
564 | ||
565 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || | |
566 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
567 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
568 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
569 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
9ab7b25e | 570 | pr_debug("elantech.c: sending Elantech magic knock failed.\n"); |
2a0bd75e AO |
571 | return -1; |
572 | } | |
573 | ||
574 | /* | |
575 | * Report this in case there are Elantech models that use a different | |
576 | * set of magic numbers | |
577 | */ | |
578 | if (param[0] != 0x3c || param[1] != 0x03 || param[2] != 0xc8) { | |
9ab7b25e AO |
579 | pr_debug("elantech.c: " |
580 | "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", | |
581 | param[0], param[1], param[2]); | |
582 | return -1; | |
583 | } | |
584 | ||
585 | /* | |
586 | * Query touchpad's firmware version and see if it reports known | |
587 | * value to avoid mis-detection. Logitech mice are known to respond | |
588 | * to Elantech magic knock and there might be more. | |
589 | */ | |
590 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
591 | pr_debug("elantech.c: failed to query firmware version.\n"); | |
592 | return -1; | |
593 | } | |
594 | ||
595 | pr_debug("elantech.c: Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n", | |
596 | param[0], param[1], param[2]); | |
597 | ||
598 | if (param[0] == 0 || param[1] != 0) { | |
599 | pr_debug("elantech.c: Probably not a real Elantech touchpad. Aborting.\n"); | |
2a0bd75e AO |
600 | return -1; |
601 | } | |
602 | ||
603 | if (set_properties) { | |
604 | psmouse->vendor = "Elantech"; | |
605 | psmouse->name = "Touchpad"; | |
606 | } | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Clean up sysfs entries when disconnecting | |
613 | */ | |
614 | static void elantech_disconnect(struct psmouse *psmouse) | |
615 | { | |
616 | sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, | |
617 | &elantech_attr_group); | |
618 | kfree(psmouse->private); | |
619 | psmouse->private = NULL; | |
620 | } | |
621 | ||
622 | /* | |
623 | * Put the touchpad back into absolute mode when reconnecting | |
624 | */ | |
625 | static int elantech_reconnect(struct psmouse *psmouse) | |
626 | { | |
627 | if (elantech_detect(psmouse, 0)) | |
628 | return -1; | |
629 | ||
630 | if (elantech_set_absolute_mode(psmouse)) { | |
631 | pr_err("elantech.c: failed to put touchpad back into absolute mode.\n"); | |
632 | return -1; | |
633 | } | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | /* | |
639 | * Initialize the touchpad and create sysfs entries | |
640 | */ | |
641 | int elantech_init(struct psmouse *psmouse) | |
642 | { | |
643 | struct elantech_data *etd; | |
644 | int i, error; | |
645 | unsigned char param[3]; | |
646 | ||
9ab7b25e | 647 | psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL); |
2a0bd75e AO |
648 | if (!etd) |
649 | return -1; | |
650 | ||
651 | etd->parity[0] = 1; | |
652 | for (i = 1; i < 256; i++) | |
653 | etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; | |
654 | ||
655 | /* | |
9ab7b25e | 656 | * Do the version query again so we can store the result |
2a0bd75e AO |
657 | */ |
658 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
659 | pr_err("elantech.c: failed to query firmware version.\n"); | |
660 | goto init_fail; | |
661 | } | |
2a0bd75e AO |
662 | etd->fw_version_maj = param[0]; |
663 | etd->fw_version_min = param[2]; | |
664 | ||
665 | /* | |
666 | * Assume every version greater than this is new EeePC style | |
667 | * hardware with 6 byte packets | |
668 | */ | |
669 | if (etd->fw_version_maj >= 0x02 && etd->fw_version_min >= 0x30) { | |
670 | etd->hw_version = 2; | |
671 | /* For now show extra debug information */ | |
672 | etd->debug = 1; | |
673 | /* Don't know how to do parity checking for version 2 */ | |
674 | etd->paritycheck = 0; | |
675 | } else { | |
676 | etd->hw_version = 1; | |
677 | etd->paritycheck = 1; | |
678 | } | |
679 | pr_info("elantech.c: assuming hardware version %d, firmware version %d.%d\n", | |
680 | etd->hw_version, etd->fw_version_maj, etd->fw_version_min); | |
681 | ||
682 | if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, param)) { | |
683 | pr_err("elantech.c: failed to query capabilities.\n"); | |
684 | goto init_fail; | |
685 | } | |
686 | pr_info("elantech.c: Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", | |
687 | param[0], param[1], param[2]); | |
688 | etd->capabilities = param[0]; | |
689 | ||
3f8c0df4 AO |
690 | /* |
691 | * This firmware seems to suffer from misreporting coordinates when | |
692 | * a touch action starts causing the mouse cursor or scrolled page | |
693 | * to jump. Enable a workaround. | |
694 | */ | |
695 | if (etd->fw_version_maj == 0x02 && etd->fw_version_min == 0x22) { | |
696 | pr_info("elantech.c: firmware version 2.34 detected, " | |
697 | "enabling jumpy cursor workaround\n"); | |
698 | etd->jumpy_cursor = 1; | |
699 | } | |
700 | ||
2a0bd75e AO |
701 | if (elantech_set_absolute_mode(psmouse)) { |
702 | pr_err("elantech.c: failed to put touchpad into absolute mode.\n"); | |
703 | goto init_fail; | |
704 | } | |
705 | ||
706 | elantech_set_input_params(psmouse); | |
707 | ||
708 | error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, | |
709 | &elantech_attr_group); | |
710 | if (error) { | |
711 | pr_err("elantech.c: failed to create sysfs attributes, error: %d.\n", | |
712 | error); | |
713 | goto init_fail; | |
714 | } | |
715 | ||
716 | psmouse->protocol_handler = elantech_process_byte; | |
717 | psmouse->disconnect = elantech_disconnect; | |
718 | psmouse->reconnect = elantech_reconnect; | |
719 | psmouse->pktsize = etd->hw_version == 2 ? 6 : 4; | |
720 | ||
721 | return 0; | |
722 | ||
723 | init_fail: | |
724 | kfree(etd); | |
725 | return -1; | |
726 | } |