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 | ||
13 | #include <linux/delay.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
2a0bd75e AO |
15 | #include <linux/module.h> |
16 | #include <linux/input.h> | |
89eec4d7 | 17 | #include <linux/input/mt.h> |
2a0bd75e AO |
18 | #include <linux/serio.h> |
19 | #include <linux/libps2.h> | |
20 | #include "psmouse.h" | |
21 | #include "elantech.h" | |
22 | ||
d4ae84a8 DT |
23 | #define elantech_debug(fmt, ...) \ |
24 | do { \ | |
25 | if (etd->debug) \ | |
b5d21704 DT |
26 | psmouse_printk(KERN_DEBUG, psmouse, \ |
27 | fmt, ##__VA_ARGS__); \ | |
2a0bd75e AO |
28 | } while (0) |
29 | ||
30 | /* | |
31 | * Send a Synaptics style sliced query command | |
32 | */ | |
33 | static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, | |
34 | unsigned char *param) | |
35 | { | |
36 | if (psmouse_sliced_command(psmouse, c) || | |
37 | ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
b5d21704 | 38 | psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); |
2a0bd75e AO |
39 | return -1; |
40 | } | |
41 | ||
42 | return 0; | |
43 | } | |
44 | ||
45 | /* | |
46 | * A retrying version of ps2_command | |
47 | */ | |
48 | static int elantech_ps2_command(struct psmouse *psmouse, | |
49 | unsigned char *param, int command) | |
50 | { | |
51 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
52 | struct elantech_data *etd = psmouse->private; | |
53 | int rc; | |
54 | int tries = ETP_PS2_COMMAND_TRIES; | |
55 | ||
56 | do { | |
57 | rc = ps2_command(ps2dev, param, command); | |
58 | if (rc == 0) | |
59 | break; | |
60 | tries--; | |
d4ae84a8 DT |
61 | elantech_debug("retrying ps2 command 0x%02x (%d).\n", |
62 | command, tries); | |
2a0bd75e AO |
63 | msleep(ETP_PS2_COMMAND_DELAY); |
64 | } while (tries > 0); | |
65 | ||
66 | if (rc) | |
b5d21704 | 67 | psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command); |
2a0bd75e AO |
68 | |
69 | return rc; | |
70 | } | |
71 | ||
72 | /* | |
73 | * Send an Elantech style special command to read a value from a register | |
74 | */ | |
75 | static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, | |
76 | unsigned char *val) | |
77 | { | |
78 | struct elantech_data *etd = psmouse->private; | |
79 | unsigned char param[3]; | |
80 | int rc = 0; | |
81 | ||
1dc6edec | 82 | if (reg < 0x07 || reg > 0x26) |
2a0bd75e AO |
83 | return -1; |
84 | ||
85 | if (reg > 0x11 && reg < 0x20) | |
86 | return -1; | |
87 | ||
88 | switch (etd->hw_version) { | |
89 | case 1: | |
90 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) || | |
91 | psmouse_sliced_command(psmouse, reg) || | |
92 | ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
93 | rc = -1; | |
94 | } | |
95 | break; | |
96 | ||
97 | case 2: | |
98 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
99 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || | |
100 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
101 | elantech_ps2_command(psmouse, NULL, reg) || | |
102 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { | |
103 | rc = -1; | |
104 | } | |
105 | break; | |
28f49616 | 106 | |
1dc6edec | 107 | case 3 ... 4: |
28f49616 JD |
108 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
109 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
110 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
111 | elantech_ps2_command(psmouse, NULL, reg) || | |
112 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { | |
113 | rc = -1; | |
114 | } | |
115 | break; | |
2a0bd75e AO |
116 | } |
117 | ||
118 | if (rc) | |
b5d21704 | 119 | psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg); |
1dc6edec | 120 | else if (etd->hw_version != 4) |
2a0bd75e | 121 | *val = param[0]; |
1dc6edec JD |
122 | else |
123 | *val = param[1]; | |
2a0bd75e AO |
124 | |
125 | return rc; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Send an Elantech style special command to write a register with a value | |
130 | */ | |
131 | static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, | |
132 | unsigned char val) | |
133 | { | |
134 | struct elantech_data *etd = psmouse->private; | |
135 | int rc = 0; | |
136 | ||
1dc6edec | 137 | if (reg < 0x07 || reg > 0x26) |
2a0bd75e AO |
138 | return -1; |
139 | ||
140 | if (reg > 0x11 && reg < 0x20) | |
141 | return -1; | |
142 | ||
143 | switch (etd->hw_version) { | |
144 | case 1: | |
145 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) || | |
146 | psmouse_sliced_command(psmouse, reg) || | |
147 | psmouse_sliced_command(psmouse, val) || | |
148 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
149 | rc = -1; | |
150 | } | |
151 | break; | |
152 | ||
153 | case 2: | |
154 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
155 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || | |
156 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
157 | elantech_ps2_command(psmouse, NULL, reg) || | |
158 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
159 | elantech_ps2_command(psmouse, NULL, val) || | |
160 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
161 | rc = -1; | |
162 | } | |
163 | break; | |
28f49616 JD |
164 | |
165 | case 3: | |
166 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
167 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
168 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
169 | elantech_ps2_command(psmouse, NULL, reg) || | |
170 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
171 | elantech_ps2_command(psmouse, NULL, val) || | |
172 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
173 | rc = -1; | |
174 | } | |
175 | break; | |
1dc6edec JD |
176 | |
177 | case 4: | |
178 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
179 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
180 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
181 | elantech_ps2_command(psmouse, NULL, reg) || | |
182 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
183 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
184 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
185 | elantech_ps2_command(psmouse, NULL, val) || | |
186 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
187 | rc = -1; | |
188 | } | |
189 | break; | |
2a0bd75e AO |
190 | } |
191 | ||
192 | if (rc) | |
b5d21704 DT |
193 | psmouse_err(psmouse, |
194 | "failed to write register 0x%02x with value 0x%02x.\n", | |
195 | reg, val); | |
2a0bd75e AO |
196 | |
197 | return rc; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Dump a complete mouse movement packet to the syslog | |
202 | */ | |
b5d21704 | 203 | static void elantech_packet_dump(struct psmouse *psmouse) |
2a0bd75e AO |
204 | { |
205 | int i; | |
206 | ||
b5d21704 DT |
207 | psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet ["); |
208 | for (i = 0; i < psmouse->pktsize; i++) | |
209 | printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]); | |
2a0bd75e AO |
210 | printk("]\n"); |
211 | } | |
212 | ||
213 | /* | |
214 | * Interpret complete data packets and report absolute mode input events for | |
215 | * hardware version 1. (4 byte packets) | |
216 | */ | |
217 | static void elantech_report_absolute_v1(struct psmouse *psmouse) | |
218 | { | |
219 | struct input_dev *dev = psmouse->dev; | |
220 | struct elantech_data *etd = psmouse->private; | |
221 | unsigned char *packet = psmouse->packet; | |
222 | int fingers; | |
223 | ||
504e8bee | 224 | if (etd->fw_version < 0x020000) { |
e938fbfd FR |
225 | /* |
226 | * byte 0: D U p1 p2 1 p3 R L | |
227 | * byte 1: f 0 th tw x9 x8 y9 y8 | |
228 | */ | |
2a0bd75e AO |
229 | fingers = ((packet[1] & 0x80) >> 7) + |
230 | ((packet[1] & 0x30) >> 4); | |
231 | } else { | |
e938fbfd FR |
232 | /* |
233 | * byte 0: n1 n0 p2 p1 1 p3 R L | |
234 | * byte 1: 0 0 0 0 x9 x8 y9 y8 | |
235 | */ | |
2a0bd75e AO |
236 | fingers = (packet[0] & 0xc0) >> 6; |
237 | } | |
238 | ||
3f8c0df4 | 239 | if (etd->jumpy_cursor) { |
7f29f17b ÉP |
240 | if (fingers != 1) { |
241 | etd->single_finger_reports = 0; | |
242 | } else if (etd->single_finger_reports < 2) { | |
243 | /* Discard first 2 reports of one finger, bogus */ | |
244 | etd->single_finger_reports++; | |
d4ae84a8 | 245 | elantech_debug("discarding packet\n"); |
7f29f17b | 246 | return; |
3f8c0df4 AO |
247 | } |
248 | } | |
249 | ||
2a0bd75e AO |
250 | input_report_key(dev, BTN_TOUCH, fingers != 0); |
251 | ||
e938fbfd FR |
252 | /* |
253 | * byte 2: x7 x6 x5 x4 x3 x2 x1 x0 | |
254 | * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 | |
255 | */ | |
2a0bd75e AO |
256 | if (fingers) { |
257 | input_report_abs(dev, ABS_X, | |
258 | ((packet[1] & 0x0c) << 6) | packet[2]); | |
e938fbfd | 259 | input_report_abs(dev, ABS_Y, |
230282a7 | 260 | etd->y_max - (((packet[1] & 0x03) << 8) | packet[3])); |
2a0bd75e AO |
261 | } |
262 | ||
263 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
264 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
265 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
266 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
267 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
268 | ||
504e8bee | 269 | if (etd->fw_version < 0x020000 && |
230282a7 | 270 | (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) { |
2a0bd75e AO |
271 | /* rocker up */ |
272 | input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); | |
273 | /* rocker down */ | |
274 | input_report_key(dev, BTN_BACK, packet[0] & 0x80); | |
275 | } | |
276 | ||
277 | input_sync(dev); | |
278 | } | |
279 | ||
89eec4d7 ÉP |
280 | static void elantech_set_slot(struct input_dev *dev, int slot, bool active, |
281 | unsigned int x, unsigned int y) | |
282 | { | |
283 | input_mt_slot(dev, slot); | |
284 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); | |
285 | if (active) { | |
286 | input_report_abs(dev, ABS_MT_POSITION_X, x); | |
287 | input_report_abs(dev, ABS_MT_POSITION_Y, y); | |
288 | } | |
289 | } | |
290 | ||
291 | /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ | |
292 | static void elantech_report_semi_mt_data(struct input_dev *dev, | |
293 | unsigned int num_fingers, | |
294 | unsigned int x1, unsigned int y1, | |
295 | unsigned int x2, unsigned int y2) | |
296 | { | |
297 | elantech_set_slot(dev, 0, num_fingers != 0, x1, y1); | |
298 | elantech_set_slot(dev, 1, num_fingers == 2, x2, y2); | |
299 | } | |
300 | ||
2a0bd75e AO |
301 | /* |
302 | * Interpret complete data packets and report absolute mode input events for | |
303 | * hardware version 2. (6 byte packets) | |
304 | */ | |
305 | static void elantech_report_absolute_v2(struct psmouse *psmouse) | |
306 | { | |
f941c705 | 307 | struct elantech_data *etd = psmouse->private; |
2a0bd75e AO |
308 | struct input_dev *dev = psmouse->dev; |
309 | unsigned char *packet = psmouse->packet; | |
461a7917 JD |
310 | unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0; |
311 | unsigned int width = 0, pres = 0; | |
2a0bd75e AO |
312 | |
313 | /* byte 0: n1 n0 . . . . R L */ | |
314 | fingers = (packet[0] & 0xc0) >> 6; | |
2a0bd75e AO |
315 | |
316 | switch (fingers) { | |
22462d9f ÉP |
317 | case 3: |
318 | /* | |
319 | * Same as one finger, except report of more than 3 fingers: | |
320 | * byte 3: n4 . w1 w0 . . . . | |
321 | */ | |
322 | if (packet[3] & 0x80) | |
323 | fingers = 4; | |
324 | /* pass through... */ | |
2a0bd75e | 325 | case 1: |
e938fbfd | 326 | /* |
11559619 | 327 | * byte 1: . . . . x11 x10 x9 x8 |
e938fbfd FR |
328 | * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 |
329 | */ | |
11559619 | 330 | x1 = ((packet[1] & 0x0f) << 8) | packet[2]; |
e938fbfd | 331 | /* |
11559619 | 332 | * byte 4: . . . . y11 y10 y9 y8 |
e938fbfd FR |
333 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 |
334 | */ | |
230282a7 | 335 | y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); |
89eec4d7 | 336 | |
f941c705 ÉP |
337 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); |
338 | width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); | |
2a0bd75e AO |
339 | break; |
340 | ||
341 | case 2: | |
e938fbfd FR |
342 | /* |
343 | * The coordinate of each finger is reported separately | |
344 | * with a lower resolution for two finger touches: | |
345 | * byte 0: . . ay8 ax8 . . . . | |
346 | * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 | |
347 | */ | |
461a7917 | 348 | x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2; |
2a0bd75e | 349 | /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ |
230282a7 | 350 | y1 = etd->y_max - |
461a7917 | 351 | ((((packet[0] & 0x20) << 3) | packet[2]) << 2); |
e938fbfd FR |
352 | /* |
353 | * byte 3: . . by8 bx8 . . . . | |
354 | * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 | |
355 | */ | |
461a7917 | 356 | x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2; |
2a0bd75e | 357 | /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ |
230282a7 | 358 | y2 = etd->y_max - |
461a7917 | 359 | ((((packet[3] & 0x20) << 3) | packet[5]) << 2); |
f941c705 ÉP |
360 | |
361 | /* Unknown so just report sensible values */ | |
362 | pres = 127; | |
363 | width = 7; | |
2a0bd75e AO |
364 | break; |
365 | } | |
366 | ||
461a7917 JD |
367 | input_report_key(dev, BTN_TOUCH, fingers != 0); |
368 | if (fingers != 0) { | |
369 | input_report_abs(dev, ABS_X, x1); | |
370 | input_report_abs(dev, ABS_Y, y1); | |
371 | } | |
89eec4d7 | 372 | elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); |
2a0bd75e AO |
373 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); |
374 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
375 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
22462d9f | 376 | input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4); |
2a0bd75e AO |
377 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); |
378 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
f941c705 ÉP |
379 | if (etd->reports_pressure) { |
380 | input_report_abs(dev, ABS_PRESSURE, pres); | |
381 | input_report_abs(dev, ABS_TOOL_WIDTH, width); | |
382 | } | |
2a0bd75e AO |
383 | |
384 | input_sync(dev); | |
385 | } | |
386 | ||
28f49616 JD |
387 | /* |
388 | * Interpret complete data packets and report absolute mode input events for | |
389 | * hardware version 3. (12 byte packets for two fingers) | |
390 | */ | |
391 | static void elantech_report_absolute_v3(struct psmouse *psmouse, | |
392 | int packet_type) | |
393 | { | |
394 | struct input_dev *dev = psmouse->dev; | |
395 | struct elantech_data *etd = psmouse->private; | |
396 | unsigned char *packet = psmouse->packet; | |
397 | unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0; | |
398 | unsigned int width = 0, pres = 0; | |
399 | ||
400 | /* byte 0: n1 n0 . . . . R L */ | |
401 | fingers = (packet[0] & 0xc0) >> 6; | |
402 | ||
403 | switch (fingers) { | |
404 | case 3: | |
405 | case 1: | |
406 | /* | |
407 | * byte 1: . . . . x11 x10 x9 x8 | |
408 | * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 | |
409 | */ | |
410 | x1 = ((packet[1] & 0x0f) << 8) | packet[2]; | |
411 | /* | |
412 | * byte 4: . . . . y11 y10 y9 y8 | |
413 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 | |
414 | */ | |
415 | y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); | |
416 | break; | |
417 | ||
418 | case 2: | |
419 | if (packet_type == PACKET_V3_HEAD) { | |
420 | /* | |
421 | * byte 1: . . . . ax11 ax10 ax9 ax8 | |
422 | * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 | |
423 | */ | |
1dc6edec | 424 | etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2]; |
28f49616 JD |
425 | /* |
426 | * byte 4: . . . . ay11 ay10 ay9 ay8 | |
427 | * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 | |
428 | */ | |
1dc6edec | 429 | etd->mt[0].y = etd->y_max - |
28f49616 JD |
430 | (((packet[4] & 0x0f) << 8) | packet[5]); |
431 | /* | |
432 | * wait for next packet | |
433 | */ | |
434 | return; | |
435 | } | |
436 | ||
437 | /* packet_type == PACKET_V3_TAIL */ | |
1dc6edec JD |
438 | x1 = etd->mt[0].x; |
439 | y1 = etd->mt[0].y; | |
28f49616 JD |
440 | x2 = ((packet[1] & 0x0f) << 8) | packet[2]; |
441 | y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); | |
442 | break; | |
443 | } | |
444 | ||
445 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); | |
446 | width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); | |
447 | ||
448 | input_report_key(dev, BTN_TOUCH, fingers != 0); | |
449 | if (fingers != 0) { | |
450 | input_report_abs(dev, ABS_X, x1); | |
451 | input_report_abs(dev, ABS_Y, y1); | |
452 | } | |
453 | elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); | |
454 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
455 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
456 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
457 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
458 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
459 | input_report_abs(dev, ABS_PRESSURE, pres); | |
460 | input_report_abs(dev, ABS_TOOL_WIDTH, width); | |
461 | ||
462 | input_sync(dev); | |
463 | } | |
464 | ||
1dc6edec JD |
465 | static void elantech_input_sync_v4(struct psmouse *psmouse) |
466 | { | |
467 | struct input_dev *dev = psmouse->dev; | |
468 | unsigned char *packet = psmouse->packet; | |
469 | ||
470 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
471 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
472 | input_mt_report_pointer_emulation(dev, true); | |
473 | input_sync(dev); | |
474 | } | |
475 | ||
476 | static void process_packet_status_v4(struct psmouse *psmouse) | |
477 | { | |
478 | struct input_dev *dev = psmouse->dev; | |
479 | unsigned char *packet = psmouse->packet; | |
480 | unsigned fingers; | |
481 | int i; | |
482 | ||
483 | /* notify finger state change */ | |
484 | fingers = packet[1] & 0x1f; | |
485 | for (i = 0; i < ETP_MAX_FINGERS; i++) { | |
486 | if ((fingers & (1 << i)) == 0) { | |
487 | input_mt_slot(dev, i); | |
488 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, false); | |
489 | } | |
490 | } | |
491 | ||
492 | elantech_input_sync_v4(psmouse); | |
493 | } | |
494 | ||
495 | static void process_packet_head_v4(struct psmouse *psmouse) | |
496 | { | |
497 | struct input_dev *dev = psmouse->dev; | |
498 | struct elantech_data *etd = psmouse->private; | |
499 | unsigned char *packet = psmouse->packet; | |
500 | int id = ((packet[3] & 0xe0) >> 5) - 1; | |
501 | int pres, traces; | |
502 | ||
503 | if (id < 0) | |
504 | return; | |
505 | ||
506 | etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2]; | |
507 | etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); | |
508 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); | |
509 | traces = (packet[0] & 0xf0) >> 4; | |
510 | ||
511 | input_mt_slot(dev, id); | |
512 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); | |
513 | ||
514 | input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); | |
515 | input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); | |
516 | input_report_abs(dev, ABS_MT_PRESSURE, pres); | |
517 | input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width); | |
518 | /* report this for backwards compatibility */ | |
519 | input_report_abs(dev, ABS_TOOL_WIDTH, traces); | |
520 | ||
521 | elantech_input_sync_v4(psmouse); | |
522 | } | |
523 | ||
524 | static void process_packet_motion_v4(struct psmouse *psmouse) | |
525 | { | |
526 | struct input_dev *dev = psmouse->dev; | |
527 | struct elantech_data *etd = psmouse->private; | |
528 | unsigned char *packet = psmouse->packet; | |
529 | int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0; | |
530 | int id, sid; | |
531 | ||
532 | id = ((packet[0] & 0xe0) >> 5) - 1; | |
533 | if (id < 0) | |
534 | return; | |
535 | ||
536 | sid = ((packet[3] & 0xe0) >> 5) - 1; | |
537 | weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1; | |
538 | /* | |
539 | * Motion packets give us the delta of x, y values of specific fingers, | |
540 | * but in two's complement. Let the compiler do the conversion for us. | |
541 | * Also _enlarge_ the numbers to int, in case of overflow. | |
542 | */ | |
543 | delta_x1 = (signed char)packet[1]; | |
544 | delta_y1 = (signed char)packet[2]; | |
545 | delta_x2 = (signed char)packet[4]; | |
546 | delta_y2 = (signed char)packet[5]; | |
547 | ||
548 | etd->mt[id].x += delta_x1 * weight; | |
549 | etd->mt[id].y -= delta_y1 * weight; | |
550 | input_mt_slot(dev, id); | |
551 | input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); | |
552 | input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); | |
553 | ||
554 | if (sid >= 0) { | |
555 | etd->mt[sid].x += delta_x2 * weight; | |
556 | etd->mt[sid].y -= delta_y2 * weight; | |
557 | input_mt_slot(dev, sid); | |
558 | input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x); | |
559 | input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y); | |
560 | } | |
561 | ||
562 | elantech_input_sync_v4(psmouse); | |
563 | } | |
564 | ||
565 | static void elantech_report_absolute_v4(struct psmouse *psmouse, | |
566 | int packet_type) | |
567 | { | |
568 | switch (packet_type) { | |
569 | case PACKET_V4_STATUS: | |
570 | process_packet_status_v4(psmouse); | |
571 | break; | |
572 | ||
573 | case PACKET_V4_HEAD: | |
574 | process_packet_head_v4(psmouse); | |
575 | break; | |
576 | ||
577 | case PACKET_V4_MOTION: | |
578 | process_packet_motion_v4(psmouse); | |
579 | break; | |
580 | ||
581 | case PACKET_UNKNOWN: | |
582 | default: | |
583 | /* impossible to get here */ | |
584 | break; | |
585 | } | |
586 | } | |
587 | ||
7894f21b | 588 | static int elantech_packet_check_v1(struct psmouse *psmouse) |
2a0bd75e AO |
589 | { |
590 | struct elantech_data *etd = psmouse->private; | |
591 | unsigned char *packet = psmouse->packet; | |
592 | unsigned char p1, p2, p3; | |
593 | ||
594 | /* Parity bits are placed differently */ | |
504e8bee | 595 | if (etd->fw_version < 0x020000) { |
2a0bd75e AO |
596 | /* byte 0: D U p1 p2 1 p3 R L */ |
597 | p1 = (packet[0] & 0x20) >> 5; | |
598 | p2 = (packet[0] & 0x10) >> 4; | |
599 | } else { | |
600 | /* byte 0: n1 n0 p2 p1 1 p3 R L */ | |
601 | p1 = (packet[0] & 0x10) >> 4; | |
602 | p2 = (packet[0] & 0x20) >> 5; | |
603 | } | |
604 | ||
605 | p3 = (packet[0] & 0x04) >> 2; | |
606 | ||
607 | return etd->parity[packet[1]] == p1 && | |
608 | etd->parity[packet[2]] == p2 && | |
609 | etd->parity[packet[3]] == p3; | |
610 | } | |
611 | ||
84a90b61 JD |
612 | static int elantech_debounce_check_v2(struct psmouse *psmouse) |
613 | { | |
614 | /* | |
615 | * When we encounter packet that matches this exactly, it means the | |
616 | * hardware is in debounce status. Just ignore the whole packet. | |
617 | */ | |
618 | const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff }; | |
619 | unsigned char *packet = psmouse->packet; | |
620 | ||
621 | return !memcmp(packet, debounce_packet, sizeof(debounce_packet)); | |
622 | } | |
623 | ||
7894f21b JD |
624 | static int elantech_packet_check_v2(struct psmouse *psmouse) |
625 | { | |
626 | struct elantech_data *etd = psmouse->private; | |
627 | unsigned char *packet = psmouse->packet; | |
628 | ||
629 | /* | |
630 | * V2 hardware has two flavors. Older ones that do not report pressure, | |
631 | * and newer ones that reports pressure and width. With newer ones, all | |
632 | * packets (1, 2, 3 finger touch) have the same constant bits. With | |
633 | * older ones, 1/3 finger touch packets and 2 finger touch packets | |
634 | * have different constant bits. | |
635 | * With all three cases, if the constant bits are not exactly what I | |
636 | * expected, I consider them invalid. | |
637 | */ | |
638 | if (etd->reports_pressure) | |
639 | return (packet[0] & 0x0c) == 0x04 && | |
640 | (packet[3] & 0x0f) == 0x02; | |
641 | ||
642 | if ((packet[0] & 0xc0) == 0x80) | |
643 | return (packet[0] & 0x0c) == 0x0c && | |
644 | (packet[3] & 0x0e) == 0x08; | |
645 | ||
646 | return (packet[0] & 0x3c) == 0x3c && | |
647 | (packet[1] & 0xf0) == 0x00 && | |
648 | (packet[3] & 0x3e) == 0x38 && | |
649 | (packet[4] & 0xf0) == 0x00; | |
650 | } | |
651 | ||
28f49616 JD |
652 | /* |
653 | * We check the constant bits to determine what packet type we get, | |
1dc6edec | 654 | * so packet checking is mandatory for v3 and later hardware. |
28f49616 JD |
655 | */ |
656 | static int elantech_packet_check_v3(struct psmouse *psmouse) | |
657 | { | |
658 | const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff }; | |
659 | unsigned char *packet = psmouse->packet; | |
660 | ||
661 | /* | |
662 | * check debounce first, it has the same signature in byte 0 | |
663 | * and byte 3 as PACKET_V3_HEAD. | |
664 | */ | |
665 | if (!memcmp(packet, debounce_packet, sizeof(debounce_packet))) | |
666 | return PACKET_DEBOUNCE; | |
667 | ||
668 | if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02) | |
669 | return PACKET_V3_HEAD; | |
670 | ||
671 | if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c) | |
672 | return PACKET_V3_TAIL; | |
673 | ||
674 | return PACKET_UNKNOWN; | |
675 | } | |
676 | ||
1dc6edec JD |
677 | static int elantech_packet_check_v4(struct psmouse *psmouse) |
678 | { | |
679 | unsigned char *packet = psmouse->packet; | |
680 | ||
681 | if ((packet[0] & 0x0c) == 0x04 && | |
682 | (packet[3] & 0x1f) == 0x11) | |
683 | return PACKET_V4_HEAD; | |
684 | ||
685 | if ((packet[0] & 0x0c) == 0x04 && | |
686 | (packet[3] & 0x1f) == 0x12) | |
687 | return PACKET_V4_MOTION; | |
688 | ||
689 | if ((packet[0] & 0x0c) == 0x04 && | |
690 | (packet[3] & 0x1f) == 0x10) | |
691 | return PACKET_V4_STATUS; | |
692 | ||
693 | return PACKET_UNKNOWN; | |
694 | } | |
695 | ||
2a0bd75e AO |
696 | /* |
697 | * Process byte stream from mouse and handle complete packets | |
698 | */ | |
699 | static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) | |
700 | { | |
701 | struct elantech_data *etd = psmouse->private; | |
28f49616 | 702 | int packet_type; |
2a0bd75e AO |
703 | |
704 | if (psmouse->pktcnt < psmouse->pktsize) | |
705 | return PSMOUSE_GOOD_DATA; | |
706 | ||
707 | if (etd->debug > 1) | |
b5d21704 | 708 | elantech_packet_dump(psmouse); |
2a0bd75e AO |
709 | |
710 | switch (etd->hw_version) { | |
711 | case 1: | |
7894f21b | 712 | if (etd->paritycheck && !elantech_packet_check_v1(psmouse)) |
2a0bd75e AO |
713 | return PSMOUSE_BAD_DATA; |
714 | ||
715 | elantech_report_absolute_v1(psmouse); | |
716 | break; | |
717 | ||
718 | case 2: | |
84a90b61 JD |
719 | /* ignore debounce */ |
720 | if (elantech_debounce_check_v2(psmouse)) | |
721 | return PSMOUSE_FULL_PACKET; | |
722 | ||
7894f21b JD |
723 | if (etd->paritycheck && !elantech_packet_check_v2(psmouse)) |
724 | return PSMOUSE_BAD_DATA; | |
725 | ||
2a0bd75e AO |
726 | elantech_report_absolute_v2(psmouse); |
727 | break; | |
28f49616 JD |
728 | |
729 | case 3: | |
730 | packet_type = elantech_packet_check_v3(psmouse); | |
731 | /* ignore debounce */ | |
732 | if (packet_type == PACKET_DEBOUNCE) | |
733 | return PSMOUSE_FULL_PACKET; | |
734 | ||
735 | if (packet_type == PACKET_UNKNOWN) | |
736 | return PSMOUSE_BAD_DATA; | |
737 | ||
738 | elantech_report_absolute_v3(psmouse, packet_type); | |
739 | break; | |
1dc6edec JD |
740 | |
741 | case 4: | |
742 | packet_type = elantech_packet_check_v4(psmouse); | |
743 | if (packet_type == PACKET_UNKNOWN) | |
744 | return PSMOUSE_BAD_DATA; | |
745 | ||
746 | elantech_report_absolute_v4(psmouse, packet_type); | |
747 | break; | |
2a0bd75e AO |
748 | } |
749 | ||
750 | return PSMOUSE_FULL_PACKET; | |
751 | } | |
752 | ||
753 | /* | |
754 | * Put the touchpad into absolute mode | |
755 | */ | |
756 | static int elantech_set_absolute_mode(struct psmouse *psmouse) | |
757 | { | |
758 | struct elantech_data *etd = psmouse->private; | |
759 | unsigned char val; | |
760 | int tries = ETP_READ_BACK_TRIES; | |
761 | int rc = 0; | |
762 | ||
763 | switch (etd->hw_version) { | |
764 | case 1: | |
765 | etd->reg_10 = 0x16; | |
766 | etd->reg_11 = 0x8f; | |
767 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
768 | elantech_write_reg(psmouse, 0x11, etd->reg_11)) { | |
769 | rc = -1; | |
770 | } | |
771 | break; | |
772 | ||
773 | case 2: | |
774 | /* Windows driver values */ | |
775 | etd->reg_10 = 0x54; | |
776 | etd->reg_11 = 0x88; /* 0x8a */ | |
777 | etd->reg_21 = 0x60; /* 0x00 */ | |
778 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
779 | elantech_write_reg(psmouse, 0x11, etd->reg_11) || | |
780 | elantech_write_reg(psmouse, 0x21, etd->reg_21)) { | |
781 | rc = -1; | |
2a0bd75e | 782 | } |
28f49616 JD |
783 | break; |
784 | ||
785 | case 3: | |
786 | etd->reg_10 = 0x0b; | |
787 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10)) | |
788 | rc = -1; | |
789 | ||
790 | break; | |
1dc6edec JD |
791 | |
792 | case 4: | |
793 | etd->reg_07 = 0x01; | |
794 | if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) | |
795 | rc = -1; | |
796 | ||
797 | goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */ | |
b2546df6 AO |
798 | } |
799 | ||
800 | if (rc == 0) { | |
2a0bd75e | 801 | /* |
b2546df6 AO |
802 | * Read back reg 0x10. For hardware version 1 we must make |
803 | * sure the absolute mode bit is set. For hardware version 2 | |
b5d21704 | 804 | * the touchpad is probably initializing and not ready until |
b2546df6 | 805 | * we read back the value we just wrote. |
2a0bd75e AO |
806 | */ |
807 | do { | |
808 | rc = elantech_read_reg(psmouse, 0x10, &val); | |
809 | if (rc == 0) | |
810 | break; | |
811 | tries--; | |
d4ae84a8 | 812 | elantech_debug("retrying read (%d).\n", tries); |
2a0bd75e AO |
813 | msleep(ETP_READ_BACK_DELAY); |
814 | } while (tries > 0); | |
b2546df6 AO |
815 | |
816 | if (rc) { | |
b5d21704 DT |
817 | psmouse_err(psmouse, |
818 | "failed to read back register 0x10.\n"); | |
b2546df6 AO |
819 | } else if (etd->hw_version == 1 && |
820 | !(val & ETP_R10_ABSOLUTE_MODE)) { | |
b5d21704 DT |
821 | psmouse_err(psmouse, |
822 | "touchpad refuses to switch to absolute mode.\n"); | |
b2546df6 AO |
823 | rc = -1; |
824 | } | |
2a0bd75e AO |
825 | } |
826 | ||
1dc6edec | 827 | skip_readback_reg_10: |
2a0bd75e | 828 | if (rc) |
b5d21704 | 829 | psmouse_err(psmouse, "failed to initialise registers.\n"); |
2a0bd75e AO |
830 | |
831 | return rc; | |
832 | } | |
833 | ||
28f49616 JD |
834 | static int elantech_set_range(struct psmouse *psmouse, |
835 | unsigned int *x_min, unsigned int *y_min, | |
1dc6edec JD |
836 | unsigned int *x_max, unsigned int *y_max, |
837 | unsigned int *width) | |
230282a7 JD |
838 | { |
839 | struct elantech_data *etd = psmouse->private; | |
28f49616 | 840 | unsigned char param[3]; |
1dc6edec | 841 | unsigned char traces; |
230282a7 JD |
842 | |
843 | switch (etd->hw_version) { | |
844 | case 1: | |
845 | *x_min = ETP_XMIN_V1; | |
846 | *y_min = ETP_YMIN_V1; | |
847 | *x_max = ETP_XMAX_V1; | |
848 | *y_max = ETP_YMAX_V1; | |
849 | break; | |
850 | ||
851 | case 2: | |
852 | if (etd->fw_version == 0x020800 || | |
853 | etd->fw_version == 0x020b00 || | |
854 | etd->fw_version == 0x020030) { | |
855 | *x_min = ETP_XMIN_V2; | |
856 | *y_min = ETP_YMIN_V2; | |
857 | *x_max = ETP_XMAX_V2; | |
858 | *y_max = ETP_YMAX_V2; | |
859 | } else { | |
84a90b61 JD |
860 | int i; |
861 | int fixed_dpi; | |
862 | ||
230282a7 JD |
863 | i = (etd->fw_version > 0x020800 && |
864 | etd->fw_version < 0x020900) ? 1 : 2; | |
84a90b61 JD |
865 | |
866 | if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param)) | |
867 | return -1; | |
868 | ||
869 | fixed_dpi = param[1] & 0x10; | |
870 | ||
871 | if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) { | |
872 | if (synaptics_send_cmd(psmouse, ETP_SAMPLE_QUERY, param)) | |
873 | return -1; | |
874 | ||
875 | *x_max = (etd->capabilities[1] - i) * param[1] / 2; | |
876 | *y_max = (etd->capabilities[2] - i) * param[2] / 2; | |
877 | } else if (etd->fw_version == 0x040216) { | |
878 | *x_max = 819; | |
879 | *y_max = 405; | |
880 | } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) { | |
881 | *x_max = 900; | |
882 | *y_max = 500; | |
883 | } else { | |
884 | *x_max = (etd->capabilities[1] - i) * 64; | |
885 | *y_max = (etd->capabilities[2] - i) * 64; | |
886 | } | |
230282a7 JD |
887 | } |
888 | break; | |
28f49616 JD |
889 | |
890 | case 3: | |
891 | if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param)) | |
892 | return -1; | |
893 | ||
894 | *x_max = (0x0f & param[0]) << 8 | param[1]; | |
895 | *y_max = (0xf0 & param[0]) << 4 | param[2]; | |
896 | break; | |
1dc6edec JD |
897 | |
898 | case 4: | |
899 | if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param)) | |
900 | return -1; | |
901 | ||
902 | *x_max = (0x0f & param[0]) << 8 | param[1]; | |
903 | *y_max = (0xf0 & param[0]) << 4 | param[2]; | |
904 | traces = etd->capabilities[1]; | |
905 | if ((traces < 2) || (traces > *x_max)) | |
906 | return -1; | |
907 | ||
908 | *width = *x_max / (traces - 1); | |
909 | break; | |
230282a7 | 910 | } |
28f49616 JD |
911 | |
912 | return 0; | |
230282a7 JD |
913 | } |
914 | ||
2a0bd75e AO |
915 | /* |
916 | * Set the appropriate event bits for the input subsystem | |
917 | */ | |
28f49616 | 918 | static int elantech_set_input_params(struct psmouse *psmouse) |
2a0bd75e AO |
919 | { |
920 | struct input_dev *dev = psmouse->dev; | |
921 | struct elantech_data *etd = psmouse->private; | |
1dc6edec | 922 | unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0; |
230282a7 | 923 | |
1dc6edec | 924 | if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width)) |
28f49616 | 925 | return -1; |
2a0bd75e AO |
926 | |
927 | __set_bit(EV_KEY, dev->evbit); | |
928 | __set_bit(EV_ABS, dev->evbit); | |
c7a1f3cc | 929 | __clear_bit(EV_REL, dev->evbit); |
2a0bd75e AO |
930 | |
931 | __set_bit(BTN_LEFT, dev->keybit); | |
932 | __set_bit(BTN_RIGHT, dev->keybit); | |
933 | ||
934 | __set_bit(BTN_TOUCH, dev->keybit); | |
935 | __set_bit(BTN_TOOL_FINGER, dev->keybit); | |
936 | __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); | |
937 | __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); | |
938 | ||
939 | switch (etd->hw_version) { | |
940 | case 1: | |
941 | /* Rocker button */ | |
504e8bee | 942 | if (etd->fw_version < 0x020000 && |
230282a7 | 943 | (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) { |
2a0bd75e AO |
944 | __set_bit(BTN_FORWARD, dev->keybit); |
945 | __set_bit(BTN_BACK, dev->keybit); | |
946 | } | |
230282a7 JD |
947 | input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); |
948 | input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); | |
2a0bd75e AO |
949 | break; |
950 | ||
951 | case 2: | |
22462d9f | 952 | __set_bit(BTN_TOOL_QUADTAP, dev->keybit); |
28f49616 JD |
953 | __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); |
954 | /* fall through */ | |
955 | case 3: | |
230282a7 JD |
956 | input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); |
957 | input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); | |
f941c705 ÉP |
958 | if (etd->reports_pressure) { |
959 | input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, | |
960 | ETP_PMAX_V2, 0, 0); | |
961 | input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, | |
962 | ETP_WMAX_V2, 0, 0); | |
963 | } | |
89eec4d7 | 964 | input_mt_init_slots(dev, 2); |
230282a7 JD |
965 | input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); |
966 | input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); | |
2a0bd75e | 967 | break; |
1dc6edec JD |
968 | |
969 | case 4: | |
970 | __set_bit(BTN_TOOL_QUADTAP, dev->keybit); | |
971 | /* For X to recognize me as touchpad. */ | |
972 | input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); | |
973 | input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); | |
974 | /* | |
975 | * range of pressure and width is the same as v2, | |
976 | * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility. | |
977 | */ | |
978 | input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, | |
979 | ETP_PMAX_V2, 0, 0); | |
980 | input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, | |
981 | ETP_WMAX_V2, 0, 0); | |
982 | /* Multitouch capable pad, up to 5 fingers. */ | |
983 | input_mt_init_slots(dev, ETP_MAX_FINGERS); | |
984 | input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); | |
985 | input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); | |
986 | input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2, | |
987 | ETP_PMAX_V2, 0, 0); | |
988 | /* | |
989 | * The firmware reports how many trace lines the finger spans, | |
990 | * convert to surface unit as Protocol-B requires. | |
991 | */ | |
992 | input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0, | |
993 | ETP_WMAX_V2 * width, 0, 0); | |
994 | break; | |
2a0bd75e | 995 | } |
230282a7 JD |
996 | |
997 | etd->y_max = y_max; | |
1dc6edec | 998 | etd->width = width; |
28f49616 JD |
999 | |
1000 | return 0; | |
2a0bd75e AO |
1001 | } |
1002 | ||
1003 | struct elantech_attr_data { | |
1004 | size_t field_offset; | |
1005 | unsigned char reg; | |
1006 | }; | |
1007 | ||
1008 | /* | |
1009 | * Display a register value by reading a sysfs entry | |
1010 | */ | |
1011 | static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, | |
1012 | char *buf) | |
1013 | { | |
1014 | struct elantech_data *etd = psmouse->private; | |
1015 | struct elantech_attr_data *attr = data; | |
1016 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
1017 | int rc = 0; | |
1018 | ||
1019 | if (attr->reg) | |
1020 | rc = elantech_read_reg(psmouse, attr->reg, reg); | |
1021 | ||
1022 | return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg); | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * Write a register value by writing a sysfs entry | |
1027 | */ | |
1028 | static ssize_t elantech_set_int_attr(struct psmouse *psmouse, | |
1029 | void *data, const char *buf, size_t count) | |
1030 | { | |
1031 | struct elantech_data *etd = psmouse->private; | |
1032 | struct elantech_attr_data *attr = data; | |
1033 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
1034 | unsigned long value; | |
1035 | int err; | |
1036 | ||
1037 | err = strict_strtoul(buf, 16, &value); | |
1038 | if (err) | |
1039 | return err; | |
1040 | ||
1041 | if (value > 0xff) | |
1042 | return -EINVAL; | |
1043 | ||
1044 | /* Do we need to preserve some bits for version 2 hardware too? */ | |
1045 | if (etd->hw_version == 1) { | |
1046 | if (attr->reg == 0x10) | |
1047 | /* Force absolute mode always on */ | |
1048 | value |= ETP_R10_ABSOLUTE_MODE; | |
1049 | else if (attr->reg == 0x11) | |
1050 | /* Force 4 byte mode always on */ | |
1051 | value |= ETP_R11_4_BYTE_MODE; | |
1052 | } | |
1053 | ||
1054 | if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0) | |
1055 | *reg = value; | |
1056 | ||
1057 | return count; | |
1058 | } | |
1059 | ||
1060 | #define ELANTECH_INT_ATTR(_name, _register) \ | |
1061 | static struct elantech_attr_data elantech_attr_##_name = { \ | |
1062 | .field_offset = offsetof(struct elantech_data, _name), \ | |
1063 | .reg = _register, \ | |
1064 | }; \ | |
1065 | PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ | |
1066 | &elantech_attr_##_name, \ | |
1067 | elantech_show_int_attr, \ | |
1068 | elantech_set_int_attr) | |
1069 | ||
1dc6edec | 1070 | ELANTECH_INT_ATTR(reg_07, 0x07); |
2a0bd75e AO |
1071 | ELANTECH_INT_ATTR(reg_10, 0x10); |
1072 | ELANTECH_INT_ATTR(reg_11, 0x11); | |
1073 | ELANTECH_INT_ATTR(reg_20, 0x20); | |
1074 | ELANTECH_INT_ATTR(reg_21, 0x21); | |
1075 | ELANTECH_INT_ATTR(reg_22, 0x22); | |
1076 | ELANTECH_INT_ATTR(reg_23, 0x23); | |
1077 | ELANTECH_INT_ATTR(reg_24, 0x24); | |
1078 | ELANTECH_INT_ATTR(reg_25, 0x25); | |
1079 | ELANTECH_INT_ATTR(reg_26, 0x26); | |
1080 | ELANTECH_INT_ATTR(debug, 0); | |
1081 | ELANTECH_INT_ATTR(paritycheck, 0); | |
1082 | ||
1083 | static struct attribute *elantech_attrs[] = { | |
1dc6edec | 1084 | &psmouse_attr_reg_07.dattr.attr, |
2a0bd75e AO |
1085 | &psmouse_attr_reg_10.dattr.attr, |
1086 | &psmouse_attr_reg_11.dattr.attr, | |
1087 | &psmouse_attr_reg_20.dattr.attr, | |
1088 | &psmouse_attr_reg_21.dattr.attr, | |
1089 | &psmouse_attr_reg_22.dattr.attr, | |
1090 | &psmouse_attr_reg_23.dattr.attr, | |
1091 | &psmouse_attr_reg_24.dattr.attr, | |
1092 | &psmouse_attr_reg_25.dattr.attr, | |
1093 | &psmouse_attr_reg_26.dattr.attr, | |
1094 | &psmouse_attr_debug.dattr.attr, | |
1095 | &psmouse_attr_paritycheck.dattr.attr, | |
1096 | NULL | |
1097 | }; | |
1098 | ||
1099 | static struct attribute_group elantech_attr_group = { | |
1100 | .attrs = elantech_attrs, | |
1101 | }; | |
1102 | ||
a083632e DT |
1103 | static bool elantech_is_signature_valid(const unsigned char *param) |
1104 | { | |
1105 | static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 }; | |
1106 | int i; | |
1107 | ||
1108 | if (param[0] == 0) | |
1109 | return false; | |
1110 | ||
1111 | if (param[1] == 0) | |
1112 | return true; | |
1113 | ||
1114 | for (i = 0; i < ARRAY_SIZE(rates); i++) | |
1115 | if (param[2] == rates[i]) | |
1116 | return false; | |
1117 | ||
1118 | return true; | |
1119 | } | |
1120 | ||
2a0bd75e AO |
1121 | /* |
1122 | * Use magic knock to detect Elantech touchpad | |
1123 | */ | |
b7802c5c | 1124 | int elantech_detect(struct psmouse *psmouse, bool set_properties) |
2a0bd75e AO |
1125 | { |
1126 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
1127 | unsigned char param[3]; | |
1128 | ||
1129 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); | |
1130 | ||
1131 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || | |
1132 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
1133 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
1134 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
1135 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
b5d21704 | 1136 | psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n"); |
2a0bd75e AO |
1137 | return -1; |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Report this in case there are Elantech models that use a different | |
1142 | * set of magic numbers | |
1143 | */ | |
28f49616 JD |
1144 | if (param[0] != 0x3c || param[1] != 0x03 || |
1145 | (param[2] != 0xc8 && param[2] != 0x00)) { | |
b5d21704 DT |
1146 | psmouse_dbg(psmouse, |
1147 | "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", | |
1148 | param[0], param[1], param[2]); | |
9ab7b25e AO |
1149 | return -1; |
1150 | } | |
1151 | ||
1152 | /* | |
1153 | * Query touchpad's firmware version and see if it reports known | |
1154 | * value to avoid mis-detection. Logitech mice are known to respond | |
1155 | * to Elantech magic knock and there might be more. | |
1156 | */ | |
1157 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
b5d21704 | 1158 | psmouse_dbg(psmouse, "failed to query firmware version.\n"); |
9ab7b25e AO |
1159 | return -1; |
1160 | } | |
1161 | ||
b5d21704 DT |
1162 | psmouse_dbg(psmouse, |
1163 | "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n", | |
1164 | param[0], param[1], param[2]); | |
9ab7b25e | 1165 | |
a083632e | 1166 | if (!elantech_is_signature_valid(param)) { |
b5d21704 DT |
1167 | psmouse_dbg(psmouse, |
1168 | "Probably not a real Elantech touchpad. Aborting.\n"); | |
4af61e90 | 1169 | return -1; |
2a0bd75e AO |
1170 | } |
1171 | ||
1172 | if (set_properties) { | |
1173 | psmouse->vendor = "Elantech"; | |
1174 | psmouse->name = "Touchpad"; | |
1175 | } | |
1176 | ||
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * Clean up sysfs entries when disconnecting | |
1182 | */ | |
1183 | static void elantech_disconnect(struct psmouse *psmouse) | |
1184 | { | |
1185 | sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, | |
1186 | &elantech_attr_group); | |
1187 | kfree(psmouse->private); | |
1188 | psmouse->private = NULL; | |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | * Put the touchpad back into absolute mode when reconnecting | |
1193 | */ | |
1194 | static int elantech_reconnect(struct psmouse *psmouse) | |
1195 | { | |
1196 | if (elantech_detect(psmouse, 0)) | |
1197 | return -1; | |
1198 | ||
1199 | if (elantech_set_absolute_mode(psmouse)) { | |
b5d21704 DT |
1200 | psmouse_err(psmouse, |
1201 | "failed to put touchpad back into absolute mode.\n"); | |
2a0bd75e AO |
1202 | return -1; |
1203 | } | |
1204 | ||
1205 | return 0; | |
1206 | } | |
1207 | ||
3c8bbb95 JD |
1208 | /* |
1209 | * determine hardware version and set some properties according to it. | |
1210 | */ | |
28f49616 | 1211 | static int elantech_set_properties(struct elantech_data *etd) |
3c8bbb95 | 1212 | { |
3940d618 | 1213 | /* This represents the version of IC body. */ |
1dc6edec JD |
1214 | int ver = (etd->fw_version & 0x0f0000) >> 16; |
1215 | ||
3940d618 | 1216 | /* Early version of Elan touchpads doesn't obey the rule. */ |
3c8bbb95 JD |
1217 | if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600) |
1218 | etd->hw_version = 1; | |
3940d618 JD |
1219 | else { |
1220 | switch (ver) { | |
1221 | case 2: | |
1222 | case 4: | |
1223 | etd->hw_version = 2; | |
1224 | break; | |
1225 | case 5: | |
1226 | etd->hw_version = 3; | |
1227 | break; | |
1228 | case 6: | |
1229 | etd->hw_version = 4; | |
1230 | break; | |
1231 | default: | |
1232 | return -1; | |
1233 | } | |
1234 | } | |
3c8bbb95 JD |
1235 | |
1236 | /* | |
1237 | * Turn on packet checking by default. | |
1238 | */ | |
1239 | etd->paritycheck = 1; | |
1240 | ||
1241 | /* | |
1242 | * This firmware suffers from misreporting coordinates when | |
1243 | * a touch action starts causing the mouse cursor or scrolled page | |
1244 | * to jump. Enable a workaround. | |
1245 | */ | |
1246 | etd->jumpy_cursor = | |
1247 | (etd->fw_version == 0x020022 || etd->fw_version == 0x020600); | |
1248 | ||
28f49616 | 1249 | if (etd->hw_version > 1) { |
3c8bbb95 JD |
1250 | /* For now show extra debug information */ |
1251 | etd->debug = 1; | |
1252 | ||
1253 | if (etd->fw_version >= 0x020800) | |
1254 | etd->reports_pressure = true; | |
1255 | } | |
28f49616 JD |
1256 | |
1257 | return 0; | |
3c8bbb95 JD |
1258 | } |
1259 | ||
2a0bd75e AO |
1260 | /* |
1261 | * Initialize the touchpad and create sysfs entries | |
1262 | */ | |
1263 | int elantech_init(struct psmouse *psmouse) | |
1264 | { | |
1265 | struct elantech_data *etd; | |
1266 | int i, error; | |
1267 | unsigned char param[3]; | |
1268 | ||
9ab7b25e | 1269 | psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL); |
2a0bd75e | 1270 | if (!etd) |
6792cbbb | 1271 | return -ENOMEM; |
2a0bd75e AO |
1272 | |
1273 | etd->parity[0] = 1; | |
1274 | for (i = 1; i < 256; i++) | |
1275 | etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; | |
1276 | ||
1277 | /* | |
9ab7b25e | 1278 | * Do the version query again so we can store the result |
2a0bd75e AO |
1279 | */ |
1280 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
b5d21704 | 1281 | psmouse_err(psmouse, "failed to query firmware version.\n"); |
2a0bd75e AO |
1282 | goto init_fail; |
1283 | } | |
504e8bee | 1284 | etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; |
28f49616 JD |
1285 | |
1286 | if (elantech_set_properties(etd)) { | |
b5d21704 | 1287 | psmouse_err(psmouse, "unknown hardware version, aborting...\n"); |
28f49616 JD |
1288 | goto init_fail; |
1289 | } | |
b5d21704 DT |
1290 | psmouse_info(psmouse, |
1291 | "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n", | |
1292 | etd->hw_version, param[0], param[1], param[2]); | |
2a0bd75e | 1293 | |
230282a7 JD |
1294 | if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, |
1295 | etd->capabilities)) { | |
b5d21704 | 1296 | psmouse_err(psmouse, "failed to query capabilities.\n"); |
2a0bd75e AO |
1297 | goto init_fail; |
1298 | } | |
b5d21704 DT |
1299 | psmouse_info(psmouse, |
1300 | "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", | |
1301 | etd->capabilities[0], etd->capabilities[1], | |
1302 | etd->capabilities[2]); | |
2a0bd75e AO |
1303 | |
1304 | if (elantech_set_absolute_mode(psmouse)) { | |
b5d21704 DT |
1305 | psmouse_err(psmouse, |
1306 | "failed to put touchpad into absolute mode.\n"); | |
2a0bd75e AO |
1307 | goto init_fail; |
1308 | } | |
1309 | ||
28f49616 | 1310 | if (elantech_set_input_params(psmouse)) { |
b5d21704 | 1311 | psmouse_err(psmouse, "failed to query touchpad range.\n"); |
28f49616 JD |
1312 | goto init_fail; |
1313 | } | |
2a0bd75e AO |
1314 | |
1315 | error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, | |
1316 | &elantech_attr_group); | |
1317 | if (error) { | |
b5d21704 DT |
1318 | psmouse_err(psmouse, |
1319 | "failed to create sysfs attributes, error: %d.\n", | |
1320 | error); | |
2a0bd75e AO |
1321 | goto init_fail; |
1322 | } | |
1323 | ||
1324 | psmouse->protocol_handler = elantech_process_byte; | |
1325 | psmouse->disconnect = elantech_disconnect; | |
1326 | psmouse->reconnect = elantech_reconnect; | |
28f49616 | 1327 | psmouse->pktsize = etd->hw_version > 1 ? 6 : 4; |
2a0bd75e AO |
1328 | |
1329 | return 0; | |
1330 | ||
1331 | init_fail: | |
1332 | kfree(etd); | |
1333 | return -1; | |
1334 | } |