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 | ||
b56b92a9 JD |
45 | /* |
46 | * V3 and later support this fast command | |
47 | */ | |
48 | static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c, | |
49 | unsigned char *param) | |
50 | { | |
51 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
52 | ||
53 | if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
54 | ps2_command(ps2dev, NULL, c) || | |
55 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
56 | psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); | |
57 | return -1; | |
58 | } | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
2a0bd75e AO |
63 | /* |
64 | * A retrying version of ps2_command | |
65 | */ | |
66 | static int elantech_ps2_command(struct psmouse *psmouse, | |
67 | unsigned char *param, int command) | |
68 | { | |
69 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
70 | struct elantech_data *etd = psmouse->private; | |
71 | int rc; | |
72 | int tries = ETP_PS2_COMMAND_TRIES; | |
73 | ||
74 | do { | |
75 | rc = ps2_command(ps2dev, param, command); | |
76 | if (rc == 0) | |
77 | break; | |
78 | tries--; | |
d4ae84a8 DT |
79 | elantech_debug("retrying ps2 command 0x%02x (%d).\n", |
80 | command, tries); | |
2a0bd75e AO |
81 | msleep(ETP_PS2_COMMAND_DELAY); |
82 | } while (tries > 0); | |
83 | ||
84 | if (rc) | |
b5d21704 | 85 | psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command); |
2a0bd75e AO |
86 | |
87 | return rc; | |
88 | } | |
89 | ||
90 | /* | |
91 | * Send an Elantech style special command to read a value from a register | |
92 | */ | |
93 | static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, | |
94 | unsigned char *val) | |
95 | { | |
96 | struct elantech_data *etd = psmouse->private; | |
97 | unsigned char param[3]; | |
98 | int rc = 0; | |
99 | ||
1dc6edec | 100 | if (reg < 0x07 || reg > 0x26) |
2a0bd75e AO |
101 | return -1; |
102 | ||
103 | if (reg > 0x11 && reg < 0x20) | |
104 | return -1; | |
105 | ||
106 | switch (etd->hw_version) { | |
107 | case 1: | |
108 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) || | |
109 | psmouse_sliced_command(psmouse, reg) || | |
110 | ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
111 | rc = -1; | |
112 | } | |
113 | break; | |
114 | ||
115 | case 2: | |
116 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
117 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || | |
118 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
119 | elantech_ps2_command(psmouse, NULL, reg) || | |
120 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { | |
121 | rc = -1; | |
122 | } | |
123 | break; | |
28f49616 | 124 | |
1dc6edec | 125 | case 3 ... 4: |
28f49616 JD |
126 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
127 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
128 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
129 | elantech_ps2_command(psmouse, NULL, reg) || | |
130 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { | |
131 | rc = -1; | |
132 | } | |
133 | break; | |
2a0bd75e AO |
134 | } |
135 | ||
136 | if (rc) | |
b5d21704 | 137 | psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg); |
1dc6edec | 138 | else if (etd->hw_version != 4) |
2a0bd75e | 139 | *val = param[0]; |
1dc6edec JD |
140 | else |
141 | *val = param[1]; | |
2a0bd75e AO |
142 | |
143 | return rc; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Send an Elantech style special command to write a register with a value | |
148 | */ | |
149 | static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, | |
150 | unsigned char val) | |
151 | { | |
152 | struct elantech_data *etd = psmouse->private; | |
153 | int rc = 0; | |
154 | ||
1dc6edec | 155 | if (reg < 0x07 || reg > 0x26) |
2a0bd75e AO |
156 | return -1; |
157 | ||
158 | if (reg > 0x11 && reg < 0x20) | |
159 | return -1; | |
160 | ||
161 | switch (etd->hw_version) { | |
162 | case 1: | |
163 | if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) || | |
164 | psmouse_sliced_command(psmouse, reg) || | |
165 | psmouse_sliced_command(psmouse, val) || | |
166 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
167 | rc = -1; | |
168 | } | |
169 | break; | |
170 | ||
171 | case 2: | |
172 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
173 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || | |
174 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
175 | elantech_ps2_command(psmouse, NULL, reg) || | |
176 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
177 | elantech_ps2_command(psmouse, NULL, val) || | |
178 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
179 | rc = -1; | |
180 | } | |
181 | break; | |
28f49616 JD |
182 | |
183 | case 3: | |
184 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
185 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
186 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
187 | elantech_ps2_command(psmouse, NULL, reg) || | |
188 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
189 | elantech_ps2_command(psmouse, NULL, val) || | |
190 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
191 | rc = -1; | |
192 | } | |
193 | break; | |
1dc6edec JD |
194 | |
195 | case 4: | |
196 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
197 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
198 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
199 | elantech_ps2_command(psmouse, NULL, reg) || | |
200 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
201 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || | |
202 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || | |
203 | elantech_ps2_command(psmouse, NULL, val) || | |
204 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { | |
205 | rc = -1; | |
206 | } | |
207 | break; | |
2a0bd75e AO |
208 | } |
209 | ||
210 | if (rc) | |
b5d21704 DT |
211 | psmouse_err(psmouse, |
212 | "failed to write register 0x%02x with value 0x%02x.\n", | |
213 | reg, val); | |
2a0bd75e AO |
214 | |
215 | return rc; | |
216 | } | |
217 | ||
218 | /* | |
219 | * Dump a complete mouse movement packet to the syslog | |
220 | */ | |
b5d21704 | 221 | static void elantech_packet_dump(struct psmouse *psmouse) |
2a0bd75e AO |
222 | { |
223 | int i; | |
224 | ||
b5d21704 DT |
225 | psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet ["); |
226 | for (i = 0; i < psmouse->pktsize; i++) | |
227 | printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]); | |
2a0bd75e AO |
228 | printk("]\n"); |
229 | } | |
230 | ||
231 | /* | |
232 | * Interpret complete data packets and report absolute mode input events for | |
233 | * hardware version 1. (4 byte packets) | |
234 | */ | |
235 | static void elantech_report_absolute_v1(struct psmouse *psmouse) | |
236 | { | |
237 | struct input_dev *dev = psmouse->dev; | |
238 | struct elantech_data *etd = psmouse->private; | |
239 | unsigned char *packet = psmouse->packet; | |
240 | int fingers; | |
241 | ||
504e8bee | 242 | if (etd->fw_version < 0x020000) { |
e938fbfd FR |
243 | /* |
244 | * byte 0: D U p1 p2 1 p3 R L | |
245 | * byte 1: f 0 th tw x9 x8 y9 y8 | |
246 | */ | |
2a0bd75e AO |
247 | fingers = ((packet[1] & 0x80) >> 7) + |
248 | ((packet[1] & 0x30) >> 4); | |
249 | } else { | |
e938fbfd FR |
250 | /* |
251 | * byte 0: n1 n0 p2 p1 1 p3 R L | |
252 | * byte 1: 0 0 0 0 x9 x8 y9 y8 | |
253 | */ | |
2a0bd75e AO |
254 | fingers = (packet[0] & 0xc0) >> 6; |
255 | } | |
256 | ||
3f8c0df4 | 257 | if (etd->jumpy_cursor) { |
7f29f17b ÉP |
258 | if (fingers != 1) { |
259 | etd->single_finger_reports = 0; | |
260 | } else if (etd->single_finger_reports < 2) { | |
261 | /* Discard first 2 reports of one finger, bogus */ | |
262 | etd->single_finger_reports++; | |
d4ae84a8 | 263 | elantech_debug("discarding packet\n"); |
7f29f17b | 264 | return; |
3f8c0df4 AO |
265 | } |
266 | } | |
267 | ||
2a0bd75e AO |
268 | input_report_key(dev, BTN_TOUCH, fingers != 0); |
269 | ||
e938fbfd FR |
270 | /* |
271 | * byte 2: x7 x6 x5 x4 x3 x2 x1 x0 | |
272 | * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 | |
273 | */ | |
2a0bd75e AO |
274 | if (fingers) { |
275 | input_report_abs(dev, ABS_X, | |
276 | ((packet[1] & 0x0c) << 6) | packet[2]); | |
e938fbfd | 277 | input_report_abs(dev, ABS_Y, |
230282a7 | 278 | etd->y_max - (((packet[1] & 0x03) << 8) | packet[3])); |
2a0bd75e AO |
279 | } |
280 | ||
281 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
282 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
283 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
284 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
285 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
286 | ||
504e8bee | 287 | if (etd->fw_version < 0x020000 && |
230282a7 | 288 | (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) { |
2a0bd75e AO |
289 | /* rocker up */ |
290 | input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); | |
291 | /* rocker down */ | |
292 | input_report_key(dev, BTN_BACK, packet[0] & 0x80); | |
293 | } | |
294 | ||
295 | input_sync(dev); | |
296 | } | |
297 | ||
89eec4d7 ÉP |
298 | static void elantech_set_slot(struct input_dev *dev, int slot, bool active, |
299 | unsigned int x, unsigned int y) | |
300 | { | |
301 | input_mt_slot(dev, slot); | |
302 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); | |
303 | if (active) { | |
304 | input_report_abs(dev, ABS_MT_POSITION_X, x); | |
305 | input_report_abs(dev, ABS_MT_POSITION_Y, y); | |
306 | } | |
307 | } | |
308 | ||
309 | /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ | |
310 | static void elantech_report_semi_mt_data(struct input_dev *dev, | |
311 | unsigned int num_fingers, | |
312 | unsigned int x1, unsigned int y1, | |
313 | unsigned int x2, unsigned int y2) | |
314 | { | |
315 | elantech_set_slot(dev, 0, num_fingers != 0, x1, y1); | |
316 | elantech_set_slot(dev, 1, num_fingers == 2, x2, y2); | |
317 | } | |
318 | ||
2a0bd75e AO |
319 | /* |
320 | * Interpret complete data packets and report absolute mode input events for | |
321 | * hardware version 2. (6 byte packets) | |
322 | */ | |
323 | static void elantech_report_absolute_v2(struct psmouse *psmouse) | |
324 | { | |
f941c705 | 325 | struct elantech_data *etd = psmouse->private; |
2a0bd75e AO |
326 | struct input_dev *dev = psmouse->dev; |
327 | unsigned char *packet = psmouse->packet; | |
461a7917 JD |
328 | unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0; |
329 | unsigned int width = 0, pres = 0; | |
2a0bd75e AO |
330 | |
331 | /* byte 0: n1 n0 . . . . R L */ | |
332 | fingers = (packet[0] & 0xc0) >> 6; | |
2a0bd75e AO |
333 | |
334 | switch (fingers) { | |
22462d9f ÉP |
335 | case 3: |
336 | /* | |
337 | * Same as one finger, except report of more than 3 fingers: | |
338 | * byte 3: n4 . w1 w0 . . . . | |
339 | */ | |
340 | if (packet[3] & 0x80) | |
341 | fingers = 4; | |
342 | /* pass through... */ | |
2a0bd75e | 343 | case 1: |
e938fbfd | 344 | /* |
11559619 | 345 | * byte 1: . . . . x11 x10 x9 x8 |
e938fbfd FR |
346 | * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 |
347 | */ | |
11559619 | 348 | x1 = ((packet[1] & 0x0f) << 8) | packet[2]; |
e938fbfd | 349 | /* |
11559619 | 350 | * byte 4: . . . . y11 y10 y9 y8 |
e938fbfd FR |
351 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 |
352 | */ | |
230282a7 | 353 | y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); |
89eec4d7 | 354 | |
f941c705 ÉP |
355 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); |
356 | width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); | |
2a0bd75e AO |
357 | break; |
358 | ||
359 | case 2: | |
e938fbfd FR |
360 | /* |
361 | * The coordinate of each finger is reported separately | |
362 | * with a lower resolution for two finger touches: | |
363 | * byte 0: . . ay8 ax8 . . . . | |
364 | * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 | |
365 | */ | |
461a7917 | 366 | x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2; |
2a0bd75e | 367 | /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ |
230282a7 | 368 | y1 = etd->y_max - |
461a7917 | 369 | ((((packet[0] & 0x20) << 3) | packet[2]) << 2); |
e938fbfd FR |
370 | /* |
371 | * byte 3: . . by8 bx8 . . . . | |
372 | * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 | |
373 | */ | |
461a7917 | 374 | x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2; |
2a0bd75e | 375 | /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ |
230282a7 | 376 | y2 = etd->y_max - |
461a7917 | 377 | ((((packet[3] & 0x20) << 3) | packet[5]) << 2); |
f941c705 ÉP |
378 | |
379 | /* Unknown so just report sensible values */ | |
380 | pres = 127; | |
381 | width = 7; | |
2a0bd75e AO |
382 | break; |
383 | } | |
384 | ||
461a7917 JD |
385 | input_report_key(dev, BTN_TOUCH, fingers != 0); |
386 | if (fingers != 0) { | |
387 | input_report_abs(dev, ABS_X, x1); | |
388 | input_report_abs(dev, ABS_Y, y1); | |
389 | } | |
89eec4d7 | 390 | elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); |
2a0bd75e AO |
391 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); |
392 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
393 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
22462d9f | 394 | input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4); |
2a0bd75e AO |
395 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); |
396 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
f941c705 ÉP |
397 | if (etd->reports_pressure) { |
398 | input_report_abs(dev, ABS_PRESSURE, pres); | |
399 | input_report_abs(dev, ABS_TOOL_WIDTH, width); | |
400 | } | |
2a0bd75e AO |
401 | |
402 | input_sync(dev); | |
403 | } | |
404 | ||
28f49616 JD |
405 | /* |
406 | * Interpret complete data packets and report absolute mode input events for | |
407 | * hardware version 3. (12 byte packets for two fingers) | |
408 | */ | |
409 | static void elantech_report_absolute_v3(struct psmouse *psmouse, | |
410 | int packet_type) | |
411 | { | |
412 | struct input_dev *dev = psmouse->dev; | |
413 | struct elantech_data *etd = psmouse->private; | |
414 | unsigned char *packet = psmouse->packet; | |
415 | unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0; | |
416 | unsigned int width = 0, pres = 0; | |
417 | ||
418 | /* byte 0: n1 n0 . . . . R L */ | |
419 | fingers = (packet[0] & 0xc0) >> 6; | |
420 | ||
421 | switch (fingers) { | |
422 | case 3: | |
423 | case 1: | |
424 | /* | |
425 | * byte 1: . . . . x11 x10 x9 x8 | |
426 | * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 | |
427 | */ | |
428 | x1 = ((packet[1] & 0x0f) << 8) | packet[2]; | |
429 | /* | |
430 | * byte 4: . . . . y11 y10 y9 y8 | |
431 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 | |
432 | */ | |
433 | y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); | |
434 | break; | |
435 | ||
436 | case 2: | |
437 | if (packet_type == PACKET_V3_HEAD) { | |
438 | /* | |
439 | * byte 1: . . . . ax11 ax10 ax9 ax8 | |
440 | * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 | |
441 | */ | |
1dc6edec | 442 | etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2]; |
28f49616 JD |
443 | /* |
444 | * byte 4: . . . . ay11 ay10 ay9 ay8 | |
445 | * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 | |
446 | */ | |
1dc6edec | 447 | etd->mt[0].y = etd->y_max - |
28f49616 JD |
448 | (((packet[4] & 0x0f) << 8) | packet[5]); |
449 | /* | |
450 | * wait for next packet | |
451 | */ | |
452 | return; | |
453 | } | |
454 | ||
455 | /* packet_type == PACKET_V3_TAIL */ | |
1dc6edec JD |
456 | x1 = etd->mt[0].x; |
457 | y1 = etd->mt[0].y; | |
28f49616 JD |
458 | x2 = ((packet[1] & 0x0f) << 8) | packet[2]; |
459 | y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); | |
460 | break; | |
461 | } | |
462 | ||
463 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); | |
464 | width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); | |
465 | ||
466 | input_report_key(dev, BTN_TOUCH, fingers != 0); | |
467 | if (fingers != 0) { | |
468 | input_report_abs(dev, ABS_X, x1); | |
469 | input_report_abs(dev, ABS_Y, y1); | |
470 | } | |
471 | elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); | |
472 | input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); | |
473 | input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); | |
474 | input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); | |
475 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
476 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
477 | input_report_abs(dev, ABS_PRESSURE, pres); | |
478 | input_report_abs(dev, ABS_TOOL_WIDTH, width); | |
479 | ||
480 | input_sync(dev); | |
481 | } | |
482 | ||
1dc6edec JD |
483 | static void elantech_input_sync_v4(struct psmouse *psmouse) |
484 | { | |
485 | struct input_dev *dev = psmouse->dev; | |
486 | unsigned char *packet = psmouse->packet; | |
487 | ||
488 | input_report_key(dev, BTN_LEFT, packet[0] & 0x01); | |
489 | input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); | |
490 | input_mt_report_pointer_emulation(dev, true); | |
491 | input_sync(dev); | |
492 | } | |
493 | ||
494 | static void process_packet_status_v4(struct psmouse *psmouse) | |
495 | { | |
496 | struct input_dev *dev = psmouse->dev; | |
497 | unsigned char *packet = psmouse->packet; | |
498 | unsigned fingers; | |
499 | int i; | |
500 | ||
501 | /* notify finger state change */ | |
502 | fingers = packet[1] & 0x1f; | |
503 | for (i = 0; i < ETP_MAX_FINGERS; i++) { | |
504 | if ((fingers & (1 << i)) == 0) { | |
505 | input_mt_slot(dev, i); | |
506 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, false); | |
507 | } | |
508 | } | |
509 | ||
510 | elantech_input_sync_v4(psmouse); | |
511 | } | |
512 | ||
513 | static void process_packet_head_v4(struct psmouse *psmouse) | |
514 | { | |
515 | struct input_dev *dev = psmouse->dev; | |
516 | struct elantech_data *etd = psmouse->private; | |
517 | unsigned char *packet = psmouse->packet; | |
518 | int id = ((packet[3] & 0xe0) >> 5) - 1; | |
519 | int pres, traces; | |
520 | ||
521 | if (id < 0) | |
522 | return; | |
523 | ||
524 | etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2]; | |
525 | etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); | |
526 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); | |
527 | traces = (packet[0] & 0xf0) >> 4; | |
528 | ||
529 | input_mt_slot(dev, id); | |
530 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); | |
531 | ||
532 | input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); | |
533 | input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); | |
534 | input_report_abs(dev, ABS_MT_PRESSURE, pres); | |
535 | input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width); | |
536 | /* report this for backwards compatibility */ | |
537 | input_report_abs(dev, ABS_TOOL_WIDTH, traces); | |
538 | ||
539 | elantech_input_sync_v4(psmouse); | |
540 | } | |
541 | ||
542 | static void process_packet_motion_v4(struct psmouse *psmouse) | |
543 | { | |
544 | struct input_dev *dev = psmouse->dev; | |
545 | struct elantech_data *etd = psmouse->private; | |
546 | unsigned char *packet = psmouse->packet; | |
547 | int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0; | |
548 | int id, sid; | |
549 | ||
550 | id = ((packet[0] & 0xe0) >> 5) - 1; | |
551 | if (id < 0) | |
552 | return; | |
553 | ||
554 | sid = ((packet[3] & 0xe0) >> 5) - 1; | |
555 | weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1; | |
556 | /* | |
557 | * Motion packets give us the delta of x, y values of specific fingers, | |
558 | * but in two's complement. Let the compiler do the conversion for us. | |
559 | * Also _enlarge_ the numbers to int, in case of overflow. | |
560 | */ | |
561 | delta_x1 = (signed char)packet[1]; | |
562 | delta_y1 = (signed char)packet[2]; | |
563 | delta_x2 = (signed char)packet[4]; | |
564 | delta_y2 = (signed char)packet[5]; | |
565 | ||
566 | etd->mt[id].x += delta_x1 * weight; | |
567 | etd->mt[id].y -= delta_y1 * weight; | |
568 | input_mt_slot(dev, id); | |
569 | input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); | |
570 | input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); | |
571 | ||
572 | if (sid >= 0) { | |
573 | etd->mt[sid].x += delta_x2 * weight; | |
574 | etd->mt[sid].y -= delta_y2 * weight; | |
575 | input_mt_slot(dev, sid); | |
576 | input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x); | |
577 | input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y); | |
578 | } | |
579 | ||
580 | elantech_input_sync_v4(psmouse); | |
581 | } | |
582 | ||
583 | static void elantech_report_absolute_v4(struct psmouse *psmouse, | |
584 | int packet_type) | |
585 | { | |
586 | switch (packet_type) { | |
587 | case PACKET_V4_STATUS: | |
588 | process_packet_status_v4(psmouse); | |
589 | break; | |
590 | ||
591 | case PACKET_V4_HEAD: | |
592 | process_packet_head_v4(psmouse); | |
593 | break; | |
594 | ||
595 | case PACKET_V4_MOTION: | |
596 | process_packet_motion_v4(psmouse); | |
597 | break; | |
598 | ||
599 | case PACKET_UNKNOWN: | |
600 | default: | |
601 | /* impossible to get here */ | |
602 | break; | |
603 | } | |
604 | } | |
605 | ||
7894f21b | 606 | static int elantech_packet_check_v1(struct psmouse *psmouse) |
2a0bd75e AO |
607 | { |
608 | struct elantech_data *etd = psmouse->private; | |
609 | unsigned char *packet = psmouse->packet; | |
610 | unsigned char p1, p2, p3; | |
611 | ||
612 | /* Parity bits are placed differently */ | |
504e8bee | 613 | if (etd->fw_version < 0x020000) { |
2a0bd75e AO |
614 | /* byte 0: D U p1 p2 1 p3 R L */ |
615 | p1 = (packet[0] & 0x20) >> 5; | |
616 | p2 = (packet[0] & 0x10) >> 4; | |
617 | } else { | |
618 | /* byte 0: n1 n0 p2 p1 1 p3 R L */ | |
619 | p1 = (packet[0] & 0x10) >> 4; | |
620 | p2 = (packet[0] & 0x20) >> 5; | |
621 | } | |
622 | ||
623 | p3 = (packet[0] & 0x04) >> 2; | |
624 | ||
625 | return etd->parity[packet[1]] == p1 && | |
626 | etd->parity[packet[2]] == p2 && | |
627 | etd->parity[packet[3]] == p3; | |
628 | } | |
629 | ||
84a90b61 JD |
630 | static int elantech_debounce_check_v2(struct psmouse *psmouse) |
631 | { | |
632 | /* | |
633 | * When we encounter packet that matches this exactly, it means the | |
634 | * hardware is in debounce status. Just ignore the whole packet. | |
635 | */ | |
636 | const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff }; | |
637 | unsigned char *packet = psmouse->packet; | |
638 | ||
639 | return !memcmp(packet, debounce_packet, sizeof(debounce_packet)); | |
640 | } | |
641 | ||
7894f21b JD |
642 | static int elantech_packet_check_v2(struct psmouse *psmouse) |
643 | { | |
644 | struct elantech_data *etd = psmouse->private; | |
645 | unsigned char *packet = psmouse->packet; | |
646 | ||
647 | /* | |
648 | * V2 hardware has two flavors. Older ones that do not report pressure, | |
649 | * and newer ones that reports pressure and width. With newer ones, all | |
650 | * packets (1, 2, 3 finger touch) have the same constant bits. With | |
651 | * older ones, 1/3 finger touch packets and 2 finger touch packets | |
652 | * have different constant bits. | |
653 | * With all three cases, if the constant bits are not exactly what I | |
654 | * expected, I consider them invalid. | |
655 | */ | |
656 | if (etd->reports_pressure) | |
657 | return (packet[0] & 0x0c) == 0x04 && | |
658 | (packet[3] & 0x0f) == 0x02; | |
659 | ||
660 | if ((packet[0] & 0xc0) == 0x80) | |
661 | return (packet[0] & 0x0c) == 0x0c && | |
662 | (packet[3] & 0x0e) == 0x08; | |
663 | ||
664 | return (packet[0] & 0x3c) == 0x3c && | |
665 | (packet[1] & 0xf0) == 0x00 && | |
666 | (packet[3] & 0x3e) == 0x38 && | |
667 | (packet[4] & 0xf0) == 0x00; | |
668 | } | |
669 | ||
28f49616 JD |
670 | /* |
671 | * We check the constant bits to determine what packet type we get, | |
1dc6edec | 672 | * so packet checking is mandatory for v3 and later hardware. |
28f49616 JD |
673 | */ |
674 | static int elantech_packet_check_v3(struct psmouse *psmouse) | |
675 | { | |
676 | const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff }; | |
677 | unsigned char *packet = psmouse->packet; | |
678 | ||
679 | /* | |
680 | * check debounce first, it has the same signature in byte 0 | |
681 | * and byte 3 as PACKET_V3_HEAD. | |
682 | */ | |
683 | if (!memcmp(packet, debounce_packet, sizeof(debounce_packet))) | |
684 | return PACKET_DEBOUNCE; | |
685 | ||
686 | if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02) | |
687 | return PACKET_V3_HEAD; | |
688 | ||
689 | if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c) | |
690 | return PACKET_V3_TAIL; | |
691 | ||
692 | return PACKET_UNKNOWN; | |
693 | } | |
694 | ||
1dc6edec JD |
695 | static int elantech_packet_check_v4(struct psmouse *psmouse) |
696 | { | |
697 | unsigned char *packet = psmouse->packet; | |
698 | ||
699 | if ((packet[0] & 0x0c) == 0x04 && | |
700 | (packet[3] & 0x1f) == 0x11) | |
701 | return PACKET_V4_HEAD; | |
702 | ||
703 | if ((packet[0] & 0x0c) == 0x04 && | |
704 | (packet[3] & 0x1f) == 0x12) | |
705 | return PACKET_V4_MOTION; | |
706 | ||
707 | if ((packet[0] & 0x0c) == 0x04 && | |
708 | (packet[3] & 0x1f) == 0x10) | |
709 | return PACKET_V4_STATUS; | |
710 | ||
711 | return PACKET_UNKNOWN; | |
712 | } | |
713 | ||
2a0bd75e AO |
714 | /* |
715 | * Process byte stream from mouse and handle complete packets | |
716 | */ | |
717 | static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) | |
718 | { | |
719 | struct elantech_data *etd = psmouse->private; | |
28f49616 | 720 | int packet_type; |
2a0bd75e AO |
721 | |
722 | if (psmouse->pktcnt < psmouse->pktsize) | |
723 | return PSMOUSE_GOOD_DATA; | |
724 | ||
725 | if (etd->debug > 1) | |
b5d21704 | 726 | elantech_packet_dump(psmouse); |
2a0bd75e AO |
727 | |
728 | switch (etd->hw_version) { | |
729 | case 1: | |
7894f21b | 730 | if (etd->paritycheck && !elantech_packet_check_v1(psmouse)) |
2a0bd75e AO |
731 | return PSMOUSE_BAD_DATA; |
732 | ||
733 | elantech_report_absolute_v1(psmouse); | |
734 | break; | |
735 | ||
736 | case 2: | |
84a90b61 JD |
737 | /* ignore debounce */ |
738 | if (elantech_debounce_check_v2(psmouse)) | |
739 | return PSMOUSE_FULL_PACKET; | |
740 | ||
7894f21b JD |
741 | if (etd->paritycheck && !elantech_packet_check_v2(psmouse)) |
742 | return PSMOUSE_BAD_DATA; | |
743 | ||
2a0bd75e AO |
744 | elantech_report_absolute_v2(psmouse); |
745 | break; | |
28f49616 JD |
746 | |
747 | case 3: | |
748 | packet_type = elantech_packet_check_v3(psmouse); | |
749 | /* ignore debounce */ | |
750 | if (packet_type == PACKET_DEBOUNCE) | |
751 | return PSMOUSE_FULL_PACKET; | |
752 | ||
753 | if (packet_type == PACKET_UNKNOWN) | |
754 | return PSMOUSE_BAD_DATA; | |
755 | ||
756 | elantech_report_absolute_v3(psmouse, packet_type); | |
757 | break; | |
1dc6edec JD |
758 | |
759 | case 4: | |
760 | packet_type = elantech_packet_check_v4(psmouse); | |
761 | if (packet_type == PACKET_UNKNOWN) | |
762 | return PSMOUSE_BAD_DATA; | |
763 | ||
764 | elantech_report_absolute_v4(psmouse, packet_type); | |
765 | break; | |
2a0bd75e AO |
766 | } |
767 | ||
768 | return PSMOUSE_FULL_PACKET; | |
769 | } | |
770 | ||
771 | /* | |
772 | * Put the touchpad into absolute mode | |
773 | */ | |
774 | static int elantech_set_absolute_mode(struct psmouse *psmouse) | |
775 | { | |
776 | struct elantech_data *etd = psmouse->private; | |
777 | unsigned char val; | |
778 | int tries = ETP_READ_BACK_TRIES; | |
779 | int rc = 0; | |
780 | ||
781 | switch (etd->hw_version) { | |
782 | case 1: | |
783 | etd->reg_10 = 0x16; | |
784 | etd->reg_11 = 0x8f; | |
785 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
786 | elantech_write_reg(psmouse, 0x11, etd->reg_11)) { | |
787 | rc = -1; | |
788 | } | |
789 | break; | |
790 | ||
791 | case 2: | |
792 | /* Windows driver values */ | |
793 | etd->reg_10 = 0x54; | |
794 | etd->reg_11 = 0x88; /* 0x8a */ | |
795 | etd->reg_21 = 0x60; /* 0x00 */ | |
796 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || | |
797 | elantech_write_reg(psmouse, 0x11, etd->reg_11) || | |
798 | elantech_write_reg(psmouse, 0x21, etd->reg_21)) { | |
799 | rc = -1; | |
2a0bd75e | 800 | } |
28f49616 JD |
801 | break; |
802 | ||
803 | case 3: | |
804 | etd->reg_10 = 0x0b; | |
805 | if (elantech_write_reg(psmouse, 0x10, etd->reg_10)) | |
806 | rc = -1; | |
807 | ||
808 | break; | |
1dc6edec JD |
809 | |
810 | case 4: | |
811 | etd->reg_07 = 0x01; | |
812 | if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) | |
813 | rc = -1; | |
814 | ||
815 | goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */ | |
b2546df6 AO |
816 | } |
817 | ||
818 | if (rc == 0) { | |
2a0bd75e | 819 | /* |
b2546df6 AO |
820 | * Read back reg 0x10. For hardware version 1 we must make |
821 | * sure the absolute mode bit is set. For hardware version 2 | |
b5d21704 | 822 | * the touchpad is probably initializing and not ready until |
b2546df6 | 823 | * we read back the value we just wrote. |
2a0bd75e AO |
824 | */ |
825 | do { | |
826 | rc = elantech_read_reg(psmouse, 0x10, &val); | |
827 | if (rc == 0) | |
828 | break; | |
829 | tries--; | |
d4ae84a8 | 830 | elantech_debug("retrying read (%d).\n", tries); |
2a0bd75e AO |
831 | msleep(ETP_READ_BACK_DELAY); |
832 | } while (tries > 0); | |
b2546df6 AO |
833 | |
834 | if (rc) { | |
b5d21704 DT |
835 | psmouse_err(psmouse, |
836 | "failed to read back register 0x10.\n"); | |
b2546df6 AO |
837 | } else if (etd->hw_version == 1 && |
838 | !(val & ETP_R10_ABSOLUTE_MODE)) { | |
b5d21704 DT |
839 | psmouse_err(psmouse, |
840 | "touchpad refuses to switch to absolute mode.\n"); | |
b2546df6 AO |
841 | rc = -1; |
842 | } | |
2a0bd75e AO |
843 | } |
844 | ||
1dc6edec | 845 | skip_readback_reg_10: |
2a0bd75e | 846 | if (rc) |
b5d21704 | 847 | psmouse_err(psmouse, "failed to initialise registers.\n"); |
2a0bd75e AO |
848 | |
849 | return rc; | |
850 | } | |
851 | ||
28f49616 JD |
852 | static int elantech_set_range(struct psmouse *psmouse, |
853 | unsigned int *x_min, unsigned int *y_min, | |
1dc6edec JD |
854 | unsigned int *x_max, unsigned int *y_max, |
855 | unsigned int *width) | |
230282a7 JD |
856 | { |
857 | struct elantech_data *etd = psmouse->private; | |
28f49616 | 858 | unsigned char param[3]; |
1dc6edec | 859 | unsigned char traces; |
230282a7 JD |
860 | |
861 | switch (etd->hw_version) { | |
862 | case 1: | |
863 | *x_min = ETP_XMIN_V1; | |
864 | *y_min = ETP_YMIN_V1; | |
865 | *x_max = ETP_XMAX_V1; | |
866 | *y_max = ETP_YMAX_V1; | |
867 | break; | |
868 | ||
869 | case 2: | |
870 | if (etd->fw_version == 0x020800 || | |
871 | etd->fw_version == 0x020b00 || | |
872 | etd->fw_version == 0x020030) { | |
873 | *x_min = ETP_XMIN_V2; | |
874 | *y_min = ETP_YMIN_V2; | |
875 | *x_max = ETP_XMAX_V2; | |
876 | *y_max = ETP_YMAX_V2; | |
877 | } else { | |
84a90b61 JD |
878 | int i; |
879 | int fixed_dpi; | |
880 | ||
230282a7 JD |
881 | i = (etd->fw_version > 0x020800 && |
882 | etd->fw_version < 0x020900) ? 1 : 2; | |
84a90b61 | 883 | |
b56b92a9 | 884 | if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) |
84a90b61 JD |
885 | return -1; |
886 | ||
887 | fixed_dpi = param[1] & 0x10; | |
888 | ||
889 | if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) { | |
b56b92a9 | 890 | if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param)) |
84a90b61 JD |
891 | return -1; |
892 | ||
893 | *x_max = (etd->capabilities[1] - i) * param[1] / 2; | |
894 | *y_max = (etd->capabilities[2] - i) * param[2] / 2; | |
895 | } else if (etd->fw_version == 0x040216) { | |
896 | *x_max = 819; | |
897 | *y_max = 405; | |
898 | } else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) { | |
899 | *x_max = 900; | |
900 | *y_max = 500; | |
901 | } else { | |
902 | *x_max = (etd->capabilities[1] - i) * 64; | |
903 | *y_max = (etd->capabilities[2] - i) * 64; | |
904 | } | |
230282a7 JD |
905 | } |
906 | break; | |
28f49616 JD |
907 | |
908 | case 3: | |
b56b92a9 | 909 | if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) |
28f49616 JD |
910 | return -1; |
911 | ||
912 | *x_max = (0x0f & param[0]) << 8 | param[1]; | |
913 | *y_max = (0xf0 & param[0]) << 4 | param[2]; | |
914 | break; | |
1dc6edec JD |
915 | |
916 | case 4: | |
b56b92a9 | 917 | if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) |
1dc6edec JD |
918 | return -1; |
919 | ||
920 | *x_max = (0x0f & param[0]) << 8 | param[1]; | |
921 | *y_max = (0xf0 & param[0]) << 4 | param[2]; | |
922 | traces = etd->capabilities[1]; | |
923 | if ((traces < 2) || (traces > *x_max)) | |
924 | return -1; | |
925 | ||
926 | *width = *x_max / (traces - 1); | |
927 | break; | |
230282a7 | 928 | } |
28f49616 JD |
929 | |
930 | return 0; | |
230282a7 JD |
931 | } |
932 | ||
2a0bd75e AO |
933 | /* |
934 | * Set the appropriate event bits for the input subsystem | |
935 | */ | |
28f49616 | 936 | static int elantech_set_input_params(struct psmouse *psmouse) |
2a0bd75e AO |
937 | { |
938 | struct input_dev *dev = psmouse->dev; | |
939 | struct elantech_data *etd = psmouse->private; | |
1dc6edec | 940 | unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0; |
230282a7 | 941 | |
1dc6edec | 942 | if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width)) |
28f49616 | 943 | return -1; |
2a0bd75e AO |
944 | |
945 | __set_bit(EV_KEY, dev->evbit); | |
946 | __set_bit(EV_ABS, dev->evbit); | |
c7a1f3cc | 947 | __clear_bit(EV_REL, dev->evbit); |
2a0bd75e AO |
948 | |
949 | __set_bit(BTN_LEFT, dev->keybit); | |
950 | __set_bit(BTN_RIGHT, dev->keybit); | |
951 | ||
952 | __set_bit(BTN_TOUCH, dev->keybit); | |
953 | __set_bit(BTN_TOOL_FINGER, dev->keybit); | |
954 | __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); | |
955 | __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); | |
956 | ||
957 | switch (etd->hw_version) { | |
958 | case 1: | |
959 | /* Rocker button */ | |
504e8bee | 960 | if (etd->fw_version < 0x020000 && |
230282a7 | 961 | (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) { |
2a0bd75e AO |
962 | __set_bit(BTN_FORWARD, dev->keybit); |
963 | __set_bit(BTN_BACK, dev->keybit); | |
964 | } | |
230282a7 JD |
965 | input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); |
966 | input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); | |
2a0bd75e AO |
967 | break; |
968 | ||
969 | case 2: | |
22462d9f | 970 | __set_bit(BTN_TOOL_QUADTAP, dev->keybit); |
28f49616 JD |
971 | __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); |
972 | /* fall through */ | |
973 | case 3: | |
230282a7 JD |
974 | input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); |
975 | input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); | |
f941c705 ÉP |
976 | if (etd->reports_pressure) { |
977 | input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, | |
978 | ETP_PMAX_V2, 0, 0); | |
979 | input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, | |
980 | ETP_WMAX_V2, 0, 0); | |
981 | } | |
89eec4d7 | 982 | input_mt_init_slots(dev, 2); |
230282a7 JD |
983 | input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); |
984 | input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); | |
2a0bd75e | 985 | break; |
1dc6edec JD |
986 | |
987 | case 4: | |
988 | __set_bit(BTN_TOOL_QUADTAP, dev->keybit); | |
989 | /* For X to recognize me as touchpad. */ | |
990 | input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); | |
991 | input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); | |
992 | /* | |
993 | * range of pressure and width is the same as v2, | |
994 | * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility. | |
995 | */ | |
996 | input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, | |
997 | ETP_PMAX_V2, 0, 0); | |
998 | input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, | |
999 | ETP_WMAX_V2, 0, 0); | |
1000 | /* Multitouch capable pad, up to 5 fingers. */ | |
1001 | input_mt_init_slots(dev, ETP_MAX_FINGERS); | |
1002 | input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); | |
1003 | input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); | |
1004 | input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2, | |
1005 | ETP_PMAX_V2, 0, 0); | |
1006 | /* | |
1007 | * The firmware reports how many trace lines the finger spans, | |
1008 | * convert to surface unit as Protocol-B requires. | |
1009 | */ | |
1010 | input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0, | |
1011 | ETP_WMAX_V2 * width, 0, 0); | |
1012 | break; | |
2a0bd75e | 1013 | } |
230282a7 JD |
1014 | |
1015 | etd->y_max = y_max; | |
1dc6edec | 1016 | etd->width = width; |
28f49616 JD |
1017 | |
1018 | return 0; | |
2a0bd75e AO |
1019 | } |
1020 | ||
1021 | struct elantech_attr_data { | |
1022 | size_t field_offset; | |
1023 | unsigned char reg; | |
1024 | }; | |
1025 | ||
1026 | /* | |
1027 | * Display a register value by reading a sysfs entry | |
1028 | */ | |
1029 | static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, | |
1030 | char *buf) | |
1031 | { | |
1032 | struct elantech_data *etd = psmouse->private; | |
1033 | struct elantech_attr_data *attr = data; | |
1034 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
1035 | int rc = 0; | |
1036 | ||
1037 | if (attr->reg) | |
1038 | rc = elantech_read_reg(psmouse, attr->reg, reg); | |
1039 | ||
1040 | return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg); | |
1041 | } | |
1042 | ||
1043 | /* | |
1044 | * Write a register value by writing a sysfs entry | |
1045 | */ | |
1046 | static ssize_t elantech_set_int_attr(struct psmouse *psmouse, | |
1047 | void *data, const char *buf, size_t count) | |
1048 | { | |
1049 | struct elantech_data *etd = psmouse->private; | |
1050 | struct elantech_attr_data *attr = data; | |
1051 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; | |
76496e7a | 1052 | unsigned char value; |
2a0bd75e AO |
1053 | int err; |
1054 | ||
76496e7a | 1055 | err = kstrtou8(buf, 16, &value); |
2a0bd75e AO |
1056 | if (err) |
1057 | return err; | |
1058 | ||
2a0bd75e AO |
1059 | /* Do we need to preserve some bits for version 2 hardware too? */ |
1060 | if (etd->hw_version == 1) { | |
1061 | if (attr->reg == 0x10) | |
1062 | /* Force absolute mode always on */ | |
1063 | value |= ETP_R10_ABSOLUTE_MODE; | |
1064 | else if (attr->reg == 0x11) | |
1065 | /* Force 4 byte mode always on */ | |
1066 | value |= ETP_R11_4_BYTE_MODE; | |
1067 | } | |
1068 | ||
1069 | if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0) | |
1070 | *reg = value; | |
1071 | ||
1072 | return count; | |
1073 | } | |
1074 | ||
1075 | #define ELANTECH_INT_ATTR(_name, _register) \ | |
1076 | static struct elantech_attr_data elantech_attr_##_name = { \ | |
1077 | .field_offset = offsetof(struct elantech_data, _name), \ | |
1078 | .reg = _register, \ | |
1079 | }; \ | |
1080 | PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ | |
1081 | &elantech_attr_##_name, \ | |
1082 | elantech_show_int_attr, \ | |
1083 | elantech_set_int_attr) | |
1084 | ||
1dc6edec | 1085 | ELANTECH_INT_ATTR(reg_07, 0x07); |
2a0bd75e AO |
1086 | ELANTECH_INT_ATTR(reg_10, 0x10); |
1087 | ELANTECH_INT_ATTR(reg_11, 0x11); | |
1088 | ELANTECH_INT_ATTR(reg_20, 0x20); | |
1089 | ELANTECH_INT_ATTR(reg_21, 0x21); | |
1090 | ELANTECH_INT_ATTR(reg_22, 0x22); | |
1091 | ELANTECH_INT_ATTR(reg_23, 0x23); | |
1092 | ELANTECH_INT_ATTR(reg_24, 0x24); | |
1093 | ELANTECH_INT_ATTR(reg_25, 0x25); | |
1094 | ELANTECH_INT_ATTR(reg_26, 0x26); | |
1095 | ELANTECH_INT_ATTR(debug, 0); | |
1096 | ELANTECH_INT_ATTR(paritycheck, 0); | |
1097 | ||
1098 | static struct attribute *elantech_attrs[] = { | |
1dc6edec | 1099 | &psmouse_attr_reg_07.dattr.attr, |
2a0bd75e AO |
1100 | &psmouse_attr_reg_10.dattr.attr, |
1101 | &psmouse_attr_reg_11.dattr.attr, | |
1102 | &psmouse_attr_reg_20.dattr.attr, | |
1103 | &psmouse_attr_reg_21.dattr.attr, | |
1104 | &psmouse_attr_reg_22.dattr.attr, | |
1105 | &psmouse_attr_reg_23.dattr.attr, | |
1106 | &psmouse_attr_reg_24.dattr.attr, | |
1107 | &psmouse_attr_reg_25.dattr.attr, | |
1108 | &psmouse_attr_reg_26.dattr.attr, | |
1109 | &psmouse_attr_debug.dattr.attr, | |
1110 | &psmouse_attr_paritycheck.dattr.attr, | |
1111 | NULL | |
1112 | }; | |
1113 | ||
1114 | static struct attribute_group elantech_attr_group = { | |
1115 | .attrs = elantech_attrs, | |
1116 | }; | |
1117 | ||
a083632e DT |
1118 | static bool elantech_is_signature_valid(const unsigned char *param) |
1119 | { | |
1120 | static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 }; | |
1121 | int i; | |
1122 | ||
1123 | if (param[0] == 0) | |
1124 | return false; | |
1125 | ||
1126 | if (param[1] == 0) | |
1127 | return true; | |
1128 | ||
1129 | for (i = 0; i < ARRAY_SIZE(rates); i++) | |
1130 | if (param[2] == rates[i]) | |
1131 | return false; | |
1132 | ||
1133 | return true; | |
1134 | } | |
1135 | ||
2a0bd75e AO |
1136 | /* |
1137 | * Use magic knock to detect Elantech touchpad | |
1138 | */ | |
b7802c5c | 1139 | int elantech_detect(struct psmouse *psmouse, bool set_properties) |
2a0bd75e AO |
1140 | { |
1141 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
1142 | unsigned char param[3]; | |
1143 | ||
1144 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); | |
1145 | ||
1146 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || | |
1147 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
1148 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
1149 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || | |
1150 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
b5d21704 | 1151 | psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n"); |
2a0bd75e AO |
1152 | return -1; |
1153 | } | |
1154 | ||
1155 | /* | |
1156 | * Report this in case there are Elantech models that use a different | |
1157 | * set of magic numbers | |
1158 | */ | |
28f49616 JD |
1159 | if (param[0] != 0x3c || param[1] != 0x03 || |
1160 | (param[2] != 0xc8 && param[2] != 0x00)) { | |
b5d21704 DT |
1161 | psmouse_dbg(psmouse, |
1162 | "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", | |
1163 | param[0], param[1], param[2]); | |
9ab7b25e AO |
1164 | return -1; |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Query touchpad's firmware version and see if it reports known | |
1169 | * value to avoid mis-detection. Logitech mice are known to respond | |
1170 | * to Elantech magic knock and there might be more. | |
1171 | */ | |
1172 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
b5d21704 | 1173 | psmouse_dbg(psmouse, "failed to query firmware version.\n"); |
9ab7b25e AO |
1174 | return -1; |
1175 | } | |
1176 | ||
b5d21704 DT |
1177 | psmouse_dbg(psmouse, |
1178 | "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n", | |
1179 | param[0], param[1], param[2]); | |
9ab7b25e | 1180 | |
a083632e | 1181 | if (!elantech_is_signature_valid(param)) { |
b5d21704 DT |
1182 | psmouse_dbg(psmouse, |
1183 | "Probably not a real Elantech touchpad. Aborting.\n"); | |
4af61e90 | 1184 | return -1; |
2a0bd75e AO |
1185 | } |
1186 | ||
1187 | if (set_properties) { | |
1188 | psmouse->vendor = "Elantech"; | |
1189 | psmouse->name = "Touchpad"; | |
1190 | } | |
1191 | ||
1192 | return 0; | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Clean up sysfs entries when disconnecting | |
1197 | */ | |
1198 | static void elantech_disconnect(struct psmouse *psmouse) | |
1199 | { | |
1200 | sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, | |
1201 | &elantech_attr_group); | |
1202 | kfree(psmouse->private); | |
1203 | psmouse->private = NULL; | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * Put the touchpad back into absolute mode when reconnecting | |
1208 | */ | |
1209 | static int elantech_reconnect(struct psmouse *psmouse) | |
1210 | { | |
1211 | if (elantech_detect(psmouse, 0)) | |
1212 | return -1; | |
1213 | ||
1214 | if (elantech_set_absolute_mode(psmouse)) { | |
b5d21704 DT |
1215 | psmouse_err(psmouse, |
1216 | "failed to put touchpad back into absolute mode.\n"); | |
2a0bd75e AO |
1217 | return -1; |
1218 | } | |
1219 | ||
1220 | return 0; | |
1221 | } | |
1222 | ||
3c8bbb95 JD |
1223 | /* |
1224 | * determine hardware version and set some properties according to it. | |
1225 | */ | |
28f49616 | 1226 | static int elantech_set_properties(struct elantech_data *etd) |
3c8bbb95 | 1227 | { |
1dc6edec JD |
1228 | int ver = (etd->fw_version & 0x0f0000) >> 16; |
1229 | ||
3c8bbb95 JD |
1230 | if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600) |
1231 | etd->hw_version = 1; | |
28f49616 | 1232 | else if (etd->fw_version < 0x150600) |
3c8bbb95 | 1233 | etd->hw_version = 2; |
1dc6edec | 1234 | else if (ver == 5) |
28f49616 | 1235 | etd->hw_version = 3; |
1dc6edec JD |
1236 | else if (ver == 6) |
1237 | etd->hw_version = 4; | |
28f49616 JD |
1238 | else |
1239 | return -1; | |
3c8bbb95 | 1240 | |
b56b92a9 JD |
1241 | /* decide which send_cmd we're gonna use early */ |
1242 | etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd : | |
1243 | synaptics_send_cmd; | |
1244 | ||
1245 | /* Turn on packet checking by default */ | |
3c8bbb95 JD |
1246 | etd->paritycheck = 1; |
1247 | ||
1248 | /* | |
1249 | * This firmware suffers from misreporting coordinates when | |
1250 | * a touch action starts causing the mouse cursor or scrolled page | |
1251 | * to jump. Enable a workaround. | |
1252 | */ | |
1253 | etd->jumpy_cursor = | |
1254 | (etd->fw_version == 0x020022 || etd->fw_version == 0x020600); | |
1255 | ||
28f49616 | 1256 | if (etd->hw_version > 1) { |
3c8bbb95 JD |
1257 | /* For now show extra debug information */ |
1258 | etd->debug = 1; | |
1259 | ||
1260 | if (etd->fw_version >= 0x020800) | |
1261 | etd->reports_pressure = true; | |
1262 | } | |
28f49616 JD |
1263 | |
1264 | return 0; | |
3c8bbb95 JD |
1265 | } |
1266 | ||
2a0bd75e AO |
1267 | /* |
1268 | * Initialize the touchpad and create sysfs entries | |
1269 | */ | |
1270 | int elantech_init(struct psmouse *psmouse) | |
1271 | { | |
1272 | struct elantech_data *etd; | |
1273 | int i, error; | |
1274 | unsigned char param[3]; | |
1275 | ||
9ab7b25e | 1276 | psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL); |
2a0bd75e | 1277 | if (!etd) |
6792cbbb | 1278 | return -ENOMEM; |
2a0bd75e AO |
1279 | |
1280 | etd->parity[0] = 1; | |
1281 | for (i = 1; i < 256; i++) | |
1282 | etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; | |
1283 | ||
1284 | /* | |
9ab7b25e | 1285 | * Do the version query again so we can store the result |
2a0bd75e AO |
1286 | */ |
1287 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { | |
b5d21704 | 1288 | psmouse_err(psmouse, "failed to query firmware version.\n"); |
2a0bd75e AO |
1289 | goto init_fail; |
1290 | } | |
504e8bee | 1291 | etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; |
28f49616 JD |
1292 | |
1293 | if (elantech_set_properties(etd)) { | |
b5d21704 | 1294 | psmouse_err(psmouse, "unknown hardware version, aborting...\n"); |
28f49616 JD |
1295 | goto init_fail; |
1296 | } | |
b5d21704 DT |
1297 | psmouse_info(psmouse, |
1298 | "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n", | |
1299 | etd->hw_version, param[0], param[1], param[2]); | |
2a0bd75e | 1300 | |
b56b92a9 | 1301 | if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY, |
230282a7 | 1302 | etd->capabilities)) { |
b5d21704 | 1303 | psmouse_err(psmouse, "failed to query capabilities.\n"); |
2a0bd75e AO |
1304 | goto init_fail; |
1305 | } | |
b5d21704 DT |
1306 | psmouse_info(psmouse, |
1307 | "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", | |
1308 | etd->capabilities[0], etd->capabilities[1], | |
1309 | etd->capabilities[2]); | |
2a0bd75e AO |
1310 | |
1311 | if (elantech_set_absolute_mode(psmouse)) { | |
b5d21704 DT |
1312 | psmouse_err(psmouse, |
1313 | "failed to put touchpad into absolute mode.\n"); | |
2a0bd75e AO |
1314 | goto init_fail; |
1315 | } | |
1316 | ||
28f49616 | 1317 | if (elantech_set_input_params(psmouse)) { |
b5d21704 | 1318 | psmouse_err(psmouse, "failed to query touchpad range.\n"); |
28f49616 JD |
1319 | goto init_fail; |
1320 | } | |
2a0bd75e AO |
1321 | |
1322 | error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, | |
1323 | &elantech_attr_group); | |
1324 | if (error) { | |
b5d21704 DT |
1325 | psmouse_err(psmouse, |
1326 | "failed to create sysfs attributes, error: %d.\n", | |
1327 | error); | |
2a0bd75e AO |
1328 | goto init_fail; |
1329 | } | |
1330 | ||
1331 | psmouse->protocol_handler = elantech_process_byte; | |
1332 | psmouse->disconnect = elantech_disconnect; | |
1333 | psmouse->reconnect = elantech_reconnect; | |
28f49616 | 1334 | psmouse->pktsize = etd->hw_version > 1 ? 6 : 4; |
2a0bd75e AO |
1335 | |
1336 | return 0; | |
1337 | ||
1338 | init_fail: | |
1339 | kfree(etd); | |
1340 | return -1; | |
1341 | } |