Commit | Line | Data |
---|---|---|
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 | ||
d4ae84a8 DT |
13 | #define pr_fmt(fmt) KBUILD_BASENAME ": " fmt |
14 | ||
2a0bd75e | 15 | #include <linux/delay.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
2a0bd75e AO |
17 | #include <linux/module.h> |
18 | #include <linux/input.h> | |
19 | #include <linux/serio.h> | |
20 | #include <linux/libps2.h> | |
21 | #include "psmouse.h" | |
22 | #include "elantech.h" | |
23 | ||
d4ae84a8 DT |
24 | #define elantech_debug(fmt, ...) \ |
25 | do { \ | |
26 | if (etd->debug) \ | |
27 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ | |
2a0bd75e AO |
28 | } while (0) |
29 | ||
f81bc788 FR |
30 | static bool force_elantech; |
31 | module_param_named(force_elantech, force_elantech, bool, 0644); | |
32 | MODULE_PARM_DESC(force_elantech, "Force the Elantech PS/2 protocol extension to be used, 1 = enabled, 0 = disabled (default)."); | |
33 | ||
2a0bd75e AO |
34 | /* |
35 | * Send a Synaptics style sliced query command | |
36 | */ | |
37 | static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, | |
38 | unsigned char *param) | |
39 | { | |
40 | if (psmouse_sliced_command(psmouse, c) || | |
41 | ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
d4ae84a8 | 42 | pr_err("synaptics_send_cmd query 0x%02x failed.\n", c); |
2a0bd75e AO |
43 | return -1; |
44 | } | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | /* | |
50 | * A retrying version of ps2_command | |
51 | */ | |
52 | static int elantech_ps2_command(struct psmouse *psmouse, | |
53 | unsigned char *param, int command) | |
54 | { | |
55 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
56 | struct elantech_data *etd = psmouse->private; | |
57 | int rc; | |
58 | int tries = ETP_PS2_COMMAND_TRIES; | |
59 | ||
60 | do { | |
61 | rc = ps2_command(ps2dev, param, command); | |
62 | if (rc == 0) | |
63 | break; | |
64 | tries--; | |
d4ae84a8 DT |
65 | elantech_debug("retrying ps2 command 0x%02x (%d).\n", |
66 | command, tries); | |
2a0bd75e AO |
67 | msleep(ETP_PS2_COMMAND_DELAY); |
68 | } while (tries > 0); | |
69 | ||
70 | if (rc) | |
d4ae84a8 | 71 | pr_err("ps2 command 0x%02x failed.\n", command); |
2a0bd75e AO |
72 | |
73 | return rc; | |
74 | } | |
75 | ||
76 | /* | |
77 | * Send an Elantech style special command to read a value from a register | |
78 | */ | |
79 | static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, | |
80 | unsigned char *val) | |
81 | { | |
82 | struct elantech_data *etd = psmouse->private; | |
83 | unsigned char param[3]; | |
84 | int rc = 0; | |
85 | ||
86 | if (reg < 0x10 || reg > 0x26) | |
87 | return -1; | |
88 | ||
89 | if (reg > 0x11 && reg < 0x20) | |
90 | return -1; | |
91 | ||
92 | switch (etd->hw_version) { | |
93 | case 1: | |
94 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) || | |
95 | psmouse_sliced_command(psmouse, reg) || | |
96 | ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
97 | rc = -1; | |
98 | } | |
99 | break; | |
100 | ||
101 | case 2: | |
102 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
103 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || | |
104 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
105 | elantech_ps2_command(psmouse, NULL, reg) || | |
106 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { | |
107 | rc = -1; | |
108 | } | |
109 | break; | |
110 | } | |
111 | ||
112 | if (rc) | |
d4ae84a8 | 113 | pr_err("failed to read register 0x%02x.\n", reg); |
2a0bd75e AO |
114 | else |
115 | *val = param[0]; | |
116 | ||
117 | return rc; | |
118 | } | |
119 | ||
120 | /* | |
121 | * Send an Elantech style special command to write a register with a value | |
122 | */ | |
123 | static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, | |
124 | unsigned char val) | |
125 | { | |
126 | struct elantech_data *etd = psmouse->private; | |
127 | int rc = 0; | |
128 | ||
129 | if (reg < 0x10 || reg > 0x26) | |
130 | return -1; | |
131 | ||
132 | if (reg > 0x11 && reg < 0x20) | |
133 | return -1; | |
134 | ||
135 | switch (etd->hw_version) { | |
136 | case 1: | |
137 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) || | |
138 | psmouse_sliced_command(psmouse, reg) || | |
139 | psmouse_sliced_command(psmouse, val) || | |
140 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
141 | rc = -1; | |
142 | } | |
143 | break; | |
144 | ||
145 | case 2: | |
146 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
147 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || | |
148 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
149 | elantech_ps2_command(psmouse, NULL, reg) || | |
150 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
151 | elantech_ps2_command(psmouse, NULL, val) || | |
152 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
153 | rc = -1; | |
154 | } | |
155 | break; | |
156 | } | |
157 | ||
158 | if (rc) | |
d4ae84a8 | 159 | pr_err("failed to write register 0x%02x with value 0x%02x.\n", |
2a0bd75e AO |
160 | reg, val); |
161 | ||
162 | return rc; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Dump a complete mouse movement packet to the syslog | |
167 | */ | |
168 | static void elantech_packet_dump(unsigned char *packet, int size) | |
169 | { | |
170 | int i; | |
171 | ||
d4ae84a8 | 172 | printk(KERN_DEBUG pr_fmt("PS/2 packet [")); |
2a0bd75e AO |
173 | for (i = 0; i < size; i++) |
174 | printk("%s0x%02x ", (i) ? ", " : " ", packet[i]); | |
175 | printk("]\n"); | |
176 | } | |
177 | ||
178 | /* | |
179 | * Interpret complete data packets and report absolute mode input events for | |
180 | * hardware version 1. (4 byte packets) | |
181 | */ | |
182 | static void elantech_report_absolute_v1(struct psmouse *psmouse) | |
183 | { | |
184 | struct input_dev *dev = psmouse->dev; | |
185 | struct elantech_data *etd = psmouse->private; | |
186 | unsigned char *packet = psmouse->packet; | |
187 | int fingers; | |
188 | ||
504e8bee | 189 | if (etd->fw_version < 0x020000) { |
e938fbfd FR |
190 | /* |
191 | * byte 0: D U p1 p2 1 p3 R L | |
192 | * byte 1: f 0 th tw x9 x8 y9 y8 | |
193 | */ | |
2a0bd75e AO |
194 | fingers = ((packet[1] & 0x80) >> 7) + |
195 | ((packet[1] & 0x30) >> 4); | |
196 | } else { | |
e938fbfd FR |
197 | /* |
198 | * byte 0: n1 n0 p2 p1 1 p3 R L | |
199 | * byte 1: 0 0 0 0 x9 x8 y9 y8 | |
200 | */ | |
2a0bd75e AO |
201 | fingers = (packet[0] & 0xc0) >> 6; |
202 | } | |
203 | ||
3f8c0df4 | 204 | if (etd->jumpy_cursor) { |
7f29f17b ÉP |
205 | if (fingers != 1) { |
206 | etd->single_finger_reports = 0; | |
207 | } else if (etd->single_finger_reports < 2) { | |
208 | /* Discard first 2 reports of one finger, bogus */ | |
209 | etd->single_finger_reports++; | |
d4ae84a8 | 210 | elantech_debug("discarding packet\n"); |
7f29f17b | 211 | return; |
3f8c0df4 AO |
212 | } |
213 | } | |
214 | ||
2a0bd75e AO |
215 | input_report_key(dev, BTN_TOUCH, fingers != 0); |
216 | ||
e938fbfd FR |
217 | /* |
218 | * byte 2: x7 x6 x5 x4 x3 x2 x1 x0 | |
219 | * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 | |
220 | */ | |
2a0bd75e AO |
221 | if (fingers) { |
222 | input_report_abs(dev, ABS_X, | |
223 | ((packet[1] & 0x0c) << 6) | packet[2]); | |
e938fbfd FR |
224 | input_report_abs(dev, ABS_Y, |
225 | ETP_YMAX_V1 - (((packet[1] & 0x03) << 8) | packet[3])); | |
2a0bd75e AO |
226 | } |
227 | ||
228 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
229 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
230 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
231 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
232 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
233 | ||
504e8bee | 234 | if (etd->fw_version < 0x020000 && |
2a0bd75e AO |
235 | (etd->capabilities & ETP_CAP_HAS_ROCKER)) { |
236 | /* rocker up */ | |
237 | input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); | |
238 | /* rocker down */ | |
239 | input_report_key(dev, BTN_BACK, packet[0] & 0x80); | |
240 | } | |
241 | ||
242 | input_sync(dev); | |
243 | } | |
244 | ||
245 | /* | |
246 | * Interpret complete data packets and report absolute mode input events for | |
247 | * hardware version 2. (6 byte packets) | |
248 | */ | |
249 | static void elantech_report_absolute_v2(struct psmouse *psmouse) | |
250 | { | |
251 | struct input_dev *dev = psmouse->dev; | |
252 | unsigned char *packet = psmouse->packet; | |
253 | int fingers, x1, y1, x2, y2; | |
254 | ||
255 | /* byte 0: n1 n0 . . . . R L */ | |
256 | fingers = (packet[0] & 0xc0) >> 6; | |
257 | input_report_key(dev, BTN_TOUCH, fingers != 0); | |
258 | ||
259 | switch (fingers) { | |
22462d9f ÉP |
260 | case 3: |
261 | /* | |
262 | * Same as one finger, except report of more than 3 fingers: | |
263 | * byte 3: n4 . w1 w0 . . . . | |
264 | */ | |
265 | if (packet[3] & 0x80) | |
266 | fingers = 4; | |
267 | /* pass through... */ | |
2a0bd75e | 268 | case 1: |
e938fbfd FR |
269 | /* |
270 | * byte 1: . . . . . x10 x9 x8 | |
271 | * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 | |
272 | */ | |
273 | input_report_abs(dev, ABS_X, | |
274 | ((packet[1] & 0x07) << 8) | packet[2]); | |
275 | /* | |
276 | * byte 4: . . . . . . y9 y8 | |
277 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 | |
278 | */ | |
279 | input_report_abs(dev, ABS_Y, | |
280 | ETP_YMAX_V2 - (((packet[4] & 0x03) << 8) | packet[5])); | |
2a0bd75e AO |
281 | break; |
282 | ||
283 | case 2: | |
e938fbfd FR |
284 | /* |
285 | * The coordinate of each finger is reported separately | |
286 | * with a lower resolution for two finger touches: | |
287 | * byte 0: . . ay8 ax8 . . . . | |
288 | * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 | |
289 | */ | |
2a0bd75e AO |
290 | x1 = ((packet[0] & 0x10) << 4) | packet[1]; |
291 | /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ | |
292 | y1 = ETP_2FT_YMAX - (((packet[0] & 0x20) << 3) | packet[2]); | |
e938fbfd FR |
293 | /* |
294 | * byte 3: . . by8 bx8 . . . . | |
295 | * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 | |
296 | */ | |
2a0bd75e AO |
297 | x2 = ((packet[3] & 0x10) << 4) | packet[4]; |
298 | /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ | |
299 | y2 = ETP_2FT_YMAX - (((packet[3] & 0x20) << 3) | packet[5]); | |
e938fbfd FR |
300 | /* |
301 | * For compatibility with the X Synaptics driver scale up | |
302 | * one coordinate and report as ordinary mouse movent | |
303 | */ | |
2a0bd75e AO |
304 | input_report_abs(dev, ABS_X, x1 << 2); |
305 | input_report_abs(dev, ABS_Y, y1 << 2); | |
e938fbfd FR |
306 | /* |
307 | * For compatibility with the proprietary X Elantech driver | |
308 | * report both coordinates as hat coordinates | |
309 | */ | |
2a0bd75e AO |
310 | input_report_abs(dev, ABS_HAT0X, x1); |
311 | input_report_abs(dev, ABS_HAT0Y, y1); | |
312 | input_report_abs(dev, ABS_HAT1X, x2); | |
313 | input_report_abs(dev, ABS_HAT1Y, y2); | |
314 | break; | |
315 | } | |
316 | ||
317 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
318 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
319 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
22462d9f | 320 | input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4); |
2a0bd75e AO |
321 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); |
322 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
323 | ||
324 | input_sync(dev); | |
325 | } | |
326 | ||
327 | static int elantech_check_parity_v1(struct psmouse *psmouse) | |
328 | { | |
329 | struct elantech_data *etd = psmouse->private; | |
330 | unsigned char *packet = psmouse->packet; | |
331 | unsigned char p1, p2, p3; | |
332 | ||
333 | /* Parity bits are placed differently */ | |
504e8bee | 334 | if (etd->fw_version < 0x020000) { |
2a0bd75e AO |
335 | /* byte 0: D U p1 p2 1 p3 R L */ |
336 | p1 = (packet[0] & 0x20) >> 5; | |
337 | p2 = (packet[0] & 0x10) >> 4; | |
338 | } else { | |
339 | /* byte 0: n1 n0 p2 p1 1 p3 R L */ | |
340 | p1 = (packet[0] & 0x10) >> 4; | |
341 | p2 = (packet[0] & 0x20) >> 5; | |
342 | } | |
343 | ||
344 | p3 = (packet[0] & 0x04) >> 2; | |
345 | ||
346 | return etd->parity[packet[1]] == p1 && | |
347 | etd->parity[packet[2]] == p2 && | |
348 | etd->parity[packet[3]] == p3; | |
349 | } | |
350 | ||
351 | /* | |
352 | * Process byte stream from mouse and handle complete packets | |
353 | */ | |
354 | static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) | |
355 | { | |
356 | struct elantech_data *etd = psmouse->private; | |
357 | ||
358 | if (psmouse->pktcnt < psmouse->pktsize) | |
359 | return PSMOUSE_GOOD_DATA; | |
360 | ||
361 | if (etd->debug > 1) | |
362 | elantech_packet_dump(psmouse->packet, psmouse->pktsize); | |
363 | ||
364 | switch (etd->hw_version) { | |
365 | case 1: | |
366 | if (etd->paritycheck && !elantech_check_parity_v1(psmouse)) | |
367 | return PSMOUSE_BAD_DATA; | |
368 | ||
369 | elantech_report_absolute_v1(psmouse); | |
370 | break; | |
371 | ||
372 | case 2: | |
373 | /* We don't know how to check parity in protocol v2 */ | |
374 | elantech_report_absolute_v2(psmouse); | |
375 | break; | |
376 | } | |
377 | ||
378 | return PSMOUSE_FULL_PACKET; | |
379 | } | |
380 | ||
381 | /* | |
382 | * Put the touchpad into absolute mode | |
383 | */ | |
384 | static int elantech_set_absolute_mode(struct psmouse *psmouse) | |
385 | { | |
386 | struct elantech_data *etd = psmouse->private; | |
387 | unsigned char val; | |
388 | int tries = ETP_READ_BACK_TRIES; | |
389 | int rc = 0; | |
390 | ||
391 | switch (etd->hw_version) { | |
392 | case 1: | |
393 | etd->reg_10 = 0x16; | |
394 | etd->reg_11 = 0x8f; | |
395 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
396 | elantech_write_reg(psmouse, 0x11, etd->reg_11)) { | |
397 | rc = -1; | |
398 | } | |
399 | break; | |
400 | ||
401 | case 2: | |
402 | /* Windows driver values */ | |
403 | etd->reg_10 = 0x54; | |
404 | etd->reg_11 = 0x88; /* 0x8a */ | |
405 | etd->reg_21 = 0x60; /* 0x00 */ | |
406 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
407 | elantech_write_reg(psmouse, 0x11, etd->reg_11) || | |
408 | elantech_write_reg(psmouse, 0x21, etd->reg_21)) { | |
409 | rc = -1; | |
410 | break; | |
411 | } | |
b2546df6 AO |
412 | } |
413 | ||
414 | if (rc == 0) { | |
2a0bd75e | 415 | /* |
b2546df6 AO |
416 | * Read back reg 0x10. For hardware version 1 we must make |
417 | * sure the absolute mode bit is set. For hardware version 2 | |
418 | * the touchpad is probably initalising and not ready until | |
419 | * we read back the value we just wrote. | |
2a0bd75e AO |
420 | */ |
421 | do { | |
422 | rc = elantech_read_reg(psmouse, 0x10, &val); | |
423 | if (rc == 0) | |
424 | break; | |
425 | tries--; | |
d4ae84a8 | 426 | elantech_debug("retrying read (%d).\n", tries); |
2a0bd75e AO |
427 | msleep(ETP_READ_BACK_DELAY); |
428 | } while (tries > 0); | |
b2546df6 AO |
429 | |
430 | if (rc) { | |
d4ae84a8 | 431 | pr_err("failed to read back register 0x10.\n"); |
b2546df6 AO |
432 | } else if (etd->hw_version == 1 && |
433 | !(val & ETP_R10_ABSOLUTE_MODE)) { | |
d4ae84a8 | 434 | pr_err("touchpad refuses to switch to absolute mode.\n"); |
b2546df6 AO |
435 | rc = -1; |
436 | } | |
2a0bd75e AO |
437 | } |
438 | ||
439 | if (rc) | |
d4ae84a8 | 440 | pr_err("failed to initialise registers.\n"); |
2a0bd75e AO |
441 | |
442 | return rc; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Set the appropriate event bits for the input subsystem | |
447 | */ | |
448 | static void elantech_set_input_params(struct psmouse *psmouse) | |
449 | { | |
450 | struct input_dev *dev = psmouse->dev; | |
451 | struct elantech_data *etd = psmouse->private; | |
452 | ||
453 | __set_bit(EV_KEY, dev->evbit); | |
454 | __set_bit(EV_ABS, dev->evbit); | |
c7a1f3cc | 455 | __clear_bit(EV_REL, dev->evbit); |
2a0bd75e AO |
456 | |
457 | __set_bit(BTN_LEFT, dev->keybit); | |
458 | __set_bit(BTN_RIGHT, dev->keybit); | |
459 | ||
460 | __set_bit(BTN_TOUCH, dev->keybit); | |
461 | __set_bit(BTN_TOOL_FINGER, dev->keybit); | |
462 | __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); | |
463 | __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); | |
464 | ||
465 | switch (etd->hw_version) { | |
466 | case 1: | |
467 | /* Rocker button */ | |
504e8bee | 468 | if (etd->fw_version < 0x020000 && |
2a0bd75e AO |
469 | (etd->capabilities & ETP_CAP_HAS_ROCKER)) { |
470 | __set_bit(BTN_FORWARD, dev->keybit); | |
471 | __set_bit(BTN_BACK, dev->keybit); | |
472 | } | |
473 | input_set_abs_params(dev, ABS_X, ETP_XMIN_V1, ETP_XMAX_V1, 0, 0); | |
474 | input_set_abs_params(dev, ABS_Y, ETP_YMIN_V1, ETP_YMAX_V1, 0, 0); | |
475 | break; | |
476 | ||
477 | case 2: | |
22462d9f | 478 | __set_bit(BTN_TOOL_QUADTAP, dev->keybit); |
2a0bd75e AO |
479 | input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0); |
480 | input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0); | |
481 | input_set_abs_params(dev, ABS_HAT0X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0); | |
482 | input_set_abs_params(dev, ABS_HAT0Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0); | |
483 | input_set_abs_params(dev, ABS_HAT1X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0); | |
484 | input_set_abs_params(dev, ABS_HAT1Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0); | |
485 | break; | |
486 | } | |
487 | } | |
488 | ||
489 | struct elantech_attr_data { | |
490 | size_t field_offset; | |
491 | unsigned char reg; | |
492 | }; | |
493 | ||
494 | /* | |
495 | * Display a register value by reading a sysfs entry | |
496 | */ | |
497 | static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, | |
498 | char *buf) | |
499 | { | |
500 | struct elantech_data *etd = psmouse->private; | |
501 | struct elantech_attr_data *attr = data; | |
502 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
503 | int rc = 0; | |
504 | ||
505 | if (attr->reg) | |
506 | rc = elantech_read_reg(psmouse, attr->reg, reg); | |
507 | ||
508 | return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg); | |
509 | } | |
510 | ||
511 | /* | |
512 | * Write a register value by writing a sysfs entry | |
513 | */ | |
514 | static ssize_t elantech_set_int_attr(struct psmouse *psmouse, | |
515 | void *data, const char *buf, size_t count) | |
516 | { | |
517 | struct elantech_data *etd = psmouse->private; | |
518 | struct elantech_attr_data *attr = data; | |
519 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
520 | unsigned long value; | |
521 | int err; | |
522 | ||
523 | err = strict_strtoul(buf, 16, &value); | |
524 | if (err) | |
525 | return err; | |
526 | ||
527 | if (value > 0xff) | |
528 | return -EINVAL; | |
529 | ||
530 | /* Do we need to preserve some bits for version 2 hardware too? */ | |
531 | if (etd->hw_version == 1) { | |
532 | if (attr->reg == 0x10) | |
533 | /* Force absolute mode always on */ | |
534 | value |= ETP_R10_ABSOLUTE_MODE; | |
535 | else if (attr->reg == 0x11) | |
536 | /* Force 4 byte mode always on */ | |
537 | value |= ETP_R11_4_BYTE_MODE; | |
538 | } | |
539 | ||
540 | if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0) | |
541 | *reg = value; | |
542 | ||
543 | return count; | |
544 | } | |
545 | ||
546 | #define ELANTECH_INT_ATTR(_name, _register) \ | |
547 | static struct elantech_attr_data elantech_attr_##_name = { \ | |
548 | .field_offset = offsetof(struct elantech_data, _name), \ | |
549 | .reg = _register, \ | |
550 | }; \ | |
551 | PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ | |
552 | &elantech_attr_##_name, \ | |
553 | elantech_show_int_attr, \ | |
554 | elantech_set_int_attr) | |
555 | ||
556 | ELANTECH_INT_ATTR(reg_10, 0x10); | |
557 | ELANTECH_INT_ATTR(reg_11, 0x11); | |
558 | ELANTECH_INT_ATTR(reg_20, 0x20); | |
559 | ELANTECH_INT_ATTR(reg_21, 0x21); | |
560 | ELANTECH_INT_ATTR(reg_22, 0x22); | |
561 | ELANTECH_INT_ATTR(reg_23, 0x23); | |
562 | ELANTECH_INT_ATTR(reg_24, 0x24); | |
563 | ELANTECH_INT_ATTR(reg_25, 0x25); | |
564 | ELANTECH_INT_ATTR(reg_26, 0x26); | |
565 | ELANTECH_INT_ATTR(debug, 0); | |
566 | ELANTECH_INT_ATTR(paritycheck, 0); | |
567 | ||
568 | static struct attribute *elantech_attrs[] = { | |
569 | &psmouse_attr_reg_10.dattr.attr, | |
570 | &psmouse_attr_reg_11.dattr.attr, | |
571 | &psmouse_attr_reg_20.dattr.attr, | |
572 | &psmouse_attr_reg_21.dattr.attr, | |
573 | &psmouse_attr_reg_22.dattr.attr, | |
574 | &psmouse_attr_reg_23.dattr.attr, | |
575 | &psmouse_attr_reg_24.dattr.attr, | |
576 | &psmouse_attr_reg_25.dattr.attr, | |
577 | &psmouse_attr_reg_26.dattr.attr, | |
578 | &psmouse_attr_debug.dattr.attr, | |
579 | &psmouse_attr_paritycheck.dattr.attr, | |
580 | NULL | |
581 | }; | |
582 | ||
583 | static struct attribute_group elantech_attr_group = { | |
584 | .attrs = elantech_attrs, | |
585 | }; | |
586 | ||
a083632e DT |
587 | static bool elantech_is_signature_valid(const unsigned char *param) |
588 | { | |
589 | static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 }; | |
590 | int i; | |
591 | ||
592 | if (param[0] == 0) | |
593 | return false; | |
594 | ||
595 | if (param[1] == 0) | |
596 | return true; | |
597 | ||
598 | for (i = 0; i < ARRAY_SIZE(rates); i++) | |
599 | if (param[2] == rates[i]) | |
600 | return false; | |
601 | ||
602 | return true; | |
603 | } | |
604 | ||
2a0bd75e AO |
605 | /* |
606 | * Use magic knock to detect Elantech touchpad | |
607 | */ | |
b7802c5c | 608 | int elantech_detect(struct psmouse *psmouse, bool set_properties) |
2a0bd75e AO |
609 | { |
610 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
611 | unsigned char param[3]; | |
612 | ||
613 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); | |
614 | ||
615 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || | |
616 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
617 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
618 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
619 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
d4ae84a8 | 620 | pr_debug("sending Elantech magic knock failed.\n"); |
2a0bd75e AO |
621 | return -1; |
622 | } | |
623 | ||
624 | /* | |
625 | * Report this in case there are Elantech models that use a different | |
626 | * set of magic numbers | |
627 | */ | |
628 | if (param[0] != 0x3c || param[1] != 0x03 || param[2] != 0xc8) { | |
d4ae84a8 | 629 | pr_debug("unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", |
9ab7b25e AO |
630 | param[0], param[1], param[2]); |
631 | return -1; | |
632 | } | |
633 | ||
634 | /* | |
635 | * Query touchpad's firmware version and see if it reports known | |
636 | * value to avoid mis-detection. Logitech mice are known to respond | |
637 | * to Elantech magic knock and there might be more. | |
638 | */ | |
639 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
d4ae84a8 | 640 | pr_debug("failed to query firmware version.\n"); |
9ab7b25e AO |
641 | return -1; |
642 | } | |
643 | ||
d4ae84a8 | 644 | pr_debug("Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n", |
9ab7b25e AO |
645 | param[0], param[1], param[2]); |
646 | ||
a083632e | 647 | if (!elantech_is_signature_valid(param)) { |
f81bc788 | 648 | if (!force_elantech) { |
d4ae84a8 | 649 | pr_debug("Probably not a real Elantech touchpad. Aborting.\n"); |
f81bc788 FR |
650 | return -1; |
651 | } | |
652 | ||
d4ae84a8 | 653 | pr_debug("Probably not a real Elantech touchpad. Enabling anyway due to force_elantech.\n"); |
2a0bd75e AO |
654 | } |
655 | ||
656 | if (set_properties) { | |
657 | psmouse->vendor = "Elantech"; | |
658 | psmouse->name = "Touchpad"; | |
659 | } | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | /* | |
665 | * Clean up sysfs entries when disconnecting | |
666 | */ | |
667 | static void elantech_disconnect(struct psmouse *psmouse) | |
668 | { | |
669 | sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, | |
670 | &elantech_attr_group); | |
671 | kfree(psmouse->private); | |
672 | psmouse->private = NULL; | |
673 | } | |
674 | ||
675 | /* | |
676 | * Put the touchpad back into absolute mode when reconnecting | |
677 | */ | |
678 | static int elantech_reconnect(struct psmouse *psmouse) | |
679 | { | |
680 | if (elantech_detect(psmouse, 0)) | |
681 | return -1; | |
682 | ||
683 | if (elantech_set_absolute_mode(psmouse)) { | |
d4ae84a8 | 684 | pr_err("failed to put touchpad back into absolute mode.\n"); |
2a0bd75e AO |
685 | return -1; |
686 | } | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | /* | |
692 | * Initialize the touchpad and create sysfs entries | |
693 | */ | |
694 | int elantech_init(struct psmouse *psmouse) | |
695 | { | |
696 | struct elantech_data *etd; | |
697 | int i, error; | |
698 | unsigned char param[3]; | |
699 | ||
9ab7b25e | 700 | psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL); |
2a0bd75e AO |
701 | if (!etd) |
702 | return -1; | |
703 | ||
704 | etd->parity[0] = 1; | |
705 | for (i = 1; i < 256; i++) | |
706 | etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; | |
707 | ||
708 | /* | |
9ab7b25e | 709 | * Do the version query again so we can store the result |
2a0bd75e AO |
710 | */ |
711 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
d4ae84a8 | 712 | pr_err("failed to query firmware version.\n"); |
2a0bd75e AO |
713 | goto init_fail; |
714 | } | |
504e8bee DT |
715 | |
716 | etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; | |
2a0bd75e AO |
717 | |
718 | /* | |
719 | * Assume every version greater than this is new EeePC style | |
720 | * hardware with 6 byte packets | |
721 | */ | |
504e8bee | 722 | if (etd->fw_version >= 0x020030) { |
2a0bd75e AO |
723 | etd->hw_version = 2; |
724 | /* For now show extra debug information */ | |
725 | etd->debug = 1; | |
726 | /* Don't know how to do parity checking for version 2 */ | |
727 | etd->paritycheck = 0; | |
728 | } else { | |
729 | etd->hw_version = 1; | |
730 | etd->paritycheck = 1; | |
731 | } | |
504e8bee | 732 | |
d4ae84a8 | 733 | pr_info("assuming hardware version %d, firmware version %d.%d.%d\n", |
504e8bee | 734 | etd->hw_version, param[0], param[1], param[2]); |
2a0bd75e AO |
735 | |
736 | if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, param)) { | |
d4ae84a8 | 737 | pr_err("failed to query capabilities.\n"); |
2a0bd75e AO |
738 | goto init_fail; |
739 | } | |
d4ae84a8 | 740 | pr_info("Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", |
2a0bd75e AO |
741 | param[0], param[1], param[2]); |
742 | etd->capabilities = param[0]; | |
743 | ||
3f8c0df4 | 744 | /* |
7f29f17b | 745 | * This firmware suffers from misreporting coordinates when |
3f8c0df4 AO |
746 | * a touch action starts causing the mouse cursor or scrolled page |
747 | * to jump. Enable a workaround. | |
748 | */ | |
7f29f17b ÉP |
749 | if (etd->fw_version == 0x020022 || etd->fw_version == 0x020600) { |
750 | pr_info("firmware version 2.0.34/2.6.0 detected, enabling jumpy cursor workaround\n"); | |
751 | etd->jumpy_cursor = true; | |
3f8c0df4 AO |
752 | } |
753 | ||
2a0bd75e | 754 | if (elantech_set_absolute_mode(psmouse)) { |
d4ae84a8 | 755 | pr_err("failed to put touchpad into absolute mode.\n"); |
2a0bd75e AO |
756 | goto init_fail; |
757 | } | |
758 | ||
759 | elantech_set_input_params(psmouse); | |
760 | ||
761 | error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, | |
762 | &elantech_attr_group); | |
763 | if (error) { | |
d4ae84a8 | 764 | pr_err("failed to create sysfs attributes, error: %d.\n", error); |
2a0bd75e AO |
765 | goto init_fail; |
766 | } | |
767 | ||
768 | psmouse->protocol_handler = elantech_process_byte; | |
769 | psmouse->disconnect = elantech_disconnect; | |
770 | psmouse->reconnect = elantech_reconnect; | |
771 | psmouse->pktsize = etd->hw_version == 2 ? 6 : 4; | |
772 | ||
773 | return 0; | |
774 | ||
775 | init_fail: | |
776 | kfree(etd); | |
777 | return -1; | |
778 | } |