1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Elantech Touchpad driver (v6) |
4 | * |
5 | * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> |
6 | * |
7 | * Trademarks are the property of their respective owners. |
8 | */ |
9 | |
10 | #include <linux/delay.h> |
11 | #include <linux/dmi.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/module.h> |
14 | #include <linux/i2c.h> |
15 | #include <linux/input.h> |
16 | #include <linux/input/mt.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/serio.h> |
19 | #include <linux/libps2.h> |
20 | #include <asm/unaligned.h> |
21 | #include "psmouse.h" |
22 | #include "elantech.h" |
23 | #include "elan_i2c.h" |
24 | |
25 | #define elantech_debug(fmt, ...) \ |
26 | do { \ |
27 | if (etd->info.debug) \ |
28 | psmouse_printk(KERN_DEBUG, psmouse, \ |
29 | fmt, ##__VA_ARGS__); \ |
30 | } while (0) |
31 | |
32 | /* |
33 | * Send a Synaptics style sliced query command |
34 | */ |
35 | static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, |
36 | unsigned char *param) |
37 | { |
38 | if (ps2_sliced_command(ps2dev: &psmouse->ps2dev, command: c) || |
39 | ps2_command(ps2dev: &psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { |
40 | psmouse_err(psmouse, "%s query 0x%02x failed.\n" , __func__, c); |
41 | return -1; |
42 | } |
43 | |
44 | return 0; |
45 | } |
46 | |
47 | /* |
48 | * V3 and later support this fast command |
49 | */ |
50 | static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c, |
51 | unsigned char *param) |
52 | { |
53 | struct ps2dev *ps2dev = &psmouse->ps2dev; |
54 | |
55 | if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) || |
56 | ps2_command(ps2dev, NULL, command: c) || |
57 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { |
58 | psmouse_err(psmouse, "%s query 0x%02x failed.\n" , __func__, c); |
59 | return -1; |
60 | } |
61 | |
62 | return 0; |
63 | } |
64 | |
65 | /* |
66 | * A retrying version of ps2_command |
67 | */ |
68 | static int elantech_ps2_command(struct psmouse *psmouse, |
69 | unsigned char *param, int command) |
70 | { |
71 | struct ps2dev *ps2dev = &psmouse->ps2dev; |
72 | struct elantech_data *etd = psmouse->private; |
73 | int rc; |
74 | int tries = ETP_PS2_COMMAND_TRIES; |
75 | |
76 | do { |
77 | rc = ps2_command(ps2dev, param, command); |
78 | if (rc == 0) |
79 | break; |
80 | tries--; |
81 | elantech_debug("retrying ps2 command 0x%02x (%d).\n" , |
82 | command, tries); |
83 | msleep(ETP_PS2_COMMAND_DELAY); |
84 | } while (tries > 0); |
85 | |
86 | if (rc) |
87 | psmouse_err(psmouse, "ps2 command 0x%02x failed.\n" , command); |
88 | |
89 | return rc; |
90 | } |
91 | |
92 | /* |
93 | * Send an Elantech style special command to read 3 bytes from a register |
94 | */ |
95 | static int elantech_read_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) |
96 | { |
97 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
98 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || |
99 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
100 | elantech_ps2_command(psmouse, NULL, command: reg) || |
101 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { |
102 | psmouse_err(psmouse, |
103 | "failed to read register %#02x\n" , reg); |
104 | return -EIO; |
105 | } |
106 | |
107 | return 0; |
108 | } |
109 | |
110 | /* |
111 | * Send an Elantech style special command to write a register with a parameter |
112 | */ |
113 | static int elantech_write_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) |
114 | { |
115 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
116 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || |
117 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
118 | elantech_ps2_command(psmouse, NULL, command: reg) || |
119 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
120 | elantech_ps2_command(psmouse, NULL, command: param[0]) || |
121 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
122 | elantech_ps2_command(psmouse, NULL, command: param[1]) || |
123 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { |
124 | psmouse_err(psmouse, |
125 | "failed to write register %#02x with value %#02x%#02x\n" , |
126 | reg, param[0], param[1]); |
127 | return -EIO; |
128 | } |
129 | |
130 | return 0; |
131 | } |
132 | |
133 | /* |
134 | * Send an Elantech style special command to read a value from a register |
135 | */ |
136 | static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, |
137 | unsigned char *val) |
138 | { |
139 | struct elantech_data *etd = psmouse->private; |
140 | unsigned char param[3]; |
141 | int rc = 0; |
142 | |
143 | if (reg < 0x07 || reg > 0x26) |
144 | return -1; |
145 | |
146 | if (reg > 0x11 && reg < 0x20) |
147 | return -1; |
148 | |
149 | switch (etd->info.hw_version) { |
150 | case 1: |
151 | if (ps2_sliced_command(ps2dev: &psmouse->ps2dev, ETP_REGISTER_READ) || |
152 | ps2_sliced_command(ps2dev: &psmouse->ps2dev, command: reg) || |
153 | ps2_command(ps2dev: &psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { |
154 | rc = -1; |
155 | } |
156 | break; |
157 | |
158 | case 2: |
159 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
160 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || |
161 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
162 | elantech_ps2_command(psmouse, NULL, command: reg) || |
163 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { |
164 | rc = -1; |
165 | } |
166 | break; |
167 | |
168 | case 3 ... 4: |
169 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
170 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || |
171 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
172 | elantech_ps2_command(psmouse, NULL, command: reg) || |
173 | elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { |
174 | rc = -1; |
175 | } |
176 | break; |
177 | } |
178 | |
179 | if (rc) |
180 | psmouse_err(psmouse, "failed to read register 0x%02x.\n" , reg); |
181 | else if (etd->info.hw_version != 4) |
182 | *val = param[0]; |
183 | else |
184 | *val = param[1]; |
185 | |
186 | return rc; |
187 | } |
188 | |
189 | /* |
190 | * Send an Elantech style special command to write a register with a value |
191 | */ |
192 | static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, |
193 | unsigned char val) |
194 | { |
195 | struct elantech_data *etd = psmouse->private; |
196 | int rc = 0; |
197 | |
198 | if (reg < 0x07 || reg > 0x26) |
199 | return -1; |
200 | |
201 | if (reg > 0x11 && reg < 0x20) |
202 | return -1; |
203 | |
204 | switch (etd->info.hw_version) { |
205 | case 1: |
206 | if (ps2_sliced_command(ps2dev: &psmouse->ps2dev, ETP_REGISTER_WRITE) || |
207 | ps2_sliced_command(ps2dev: &psmouse->ps2dev, command: reg) || |
208 | ps2_sliced_command(ps2dev: &psmouse->ps2dev, command: val) || |
209 | ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { |
210 | rc = -1; |
211 | } |
212 | break; |
213 | |
214 | case 2: |
215 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
216 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || |
217 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
218 | elantech_ps2_command(psmouse, NULL, command: reg) || |
219 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
220 | elantech_ps2_command(psmouse, NULL, command: val) || |
221 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { |
222 | rc = -1; |
223 | } |
224 | break; |
225 | |
226 | case 3: |
227 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
228 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || |
229 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
230 | elantech_ps2_command(psmouse, NULL, command: reg) || |
231 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
232 | elantech_ps2_command(psmouse, NULL, command: val) || |
233 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { |
234 | rc = -1; |
235 | } |
236 | break; |
237 | |
238 | case 4: |
239 | if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
240 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || |
241 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
242 | elantech_ps2_command(psmouse, NULL, command: reg) || |
243 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
244 | elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || |
245 | elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || |
246 | elantech_ps2_command(psmouse, NULL, command: val) || |
247 | elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { |
248 | rc = -1; |
249 | } |
250 | break; |
251 | } |
252 | |
253 | if (rc) |
254 | psmouse_err(psmouse, |
255 | "failed to write register 0x%02x with value 0x%02x.\n" , |
256 | reg, val); |
257 | |
258 | return rc; |
259 | } |
260 | |
261 | /* |
262 | * Dump a complete mouse movement packet to the syslog |
263 | */ |
264 | static void elantech_packet_dump(struct psmouse *psmouse) |
265 | { |
266 | psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n" , |
267 | psmouse->pktsize, psmouse->packet); |
268 | } |
269 | |
270 | /* |
271 | * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in |
272 | * fw_version for this is based on the following fw_version & caps table: |
273 | * |
274 | * Laptop-model: fw_version: caps: buttons: |
275 | * Acer S3 0x461f00 10, 13, 0e clickpad |
276 | * Acer S7-392 0x581f01 50, 17, 0d clickpad |
277 | * Acer V5-131 0x461f02 01, 16, 0c clickpad |
278 | * Acer V5-551 0x461f00 ? clickpad |
279 | * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons |
280 | * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons |
281 | * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons |
282 | * Asus TP500LN 0x381f17 10, 14, 0e clickpad |
283 | * Asus X750JN 0x381f17 10, 14, 0e clickpad |
284 | * Asus UX31 0x361f00 20, 15, 0e clickpad |
285 | * Asus UX32VD 0x361f02 00, 15, 0e clickpad |
286 | * Avatar AVIU-145A2 0x361f00 ? clickpad |
287 | * Fujitsu CELSIUS H760 0x570f02 40, 14, 0c 3 hw buttons (**) |
288 | * Fujitsu CELSIUS H780 0x5d0f02 41, 16, 0d 3 hw buttons (**) |
289 | * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons |
290 | * Fujitsu LIFEBOOK E546 0x470f00 50, 12, 09 2 hw buttons |
291 | * Fujitsu LIFEBOOK E547 0x470f00 50, 12, 09 2 hw buttons |
292 | * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons |
293 | * Fujitsu LIFEBOOK E557 0x570f01 40, 14, 0c 2 hw buttons |
294 | * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons |
295 | * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**) |
296 | * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons |
297 | * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*) |
298 | * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*) |
299 | * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons |
300 | * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad |
301 | * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad |
302 | * Samsung NP900X3E-A02 0x575f03 ? clickpad |
303 | * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad |
304 | * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons |
305 | * Samsung RF710 0x450f00 ? 2 hw buttons |
306 | * System76 Pangolin 0x250f01 ? 2 hw buttons |
307 | * (*) + 3 trackpoint buttons |
308 | * (**) + 0 trackpoint buttons |
309 | * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps |
310 | */ |
311 | static inline int elantech_is_buttonpad(struct elantech_device_info *info) |
312 | { |
313 | return info->fw_version & 0x001000; |
314 | } |
315 | |
316 | /* |
317 | * Interpret complete data packets and report absolute mode input events for |
318 | * hardware version 1. (4 byte packets) |
319 | */ |
320 | static void elantech_report_absolute_v1(struct psmouse *psmouse) |
321 | { |
322 | struct input_dev *dev = psmouse->dev; |
323 | struct elantech_data *etd = psmouse->private; |
324 | unsigned char *packet = psmouse->packet; |
325 | int fingers; |
326 | |
327 | if (etd->info.fw_version < 0x020000) { |
328 | /* |
329 | * byte 0: D U p1 p2 1 p3 R L |
330 | * byte 1: f 0 th tw x9 x8 y9 y8 |
331 | */ |
332 | fingers = ((packet[1] & 0x80) >> 7) + |
333 | ((packet[1] & 0x30) >> 4); |
334 | } else { |
335 | /* |
336 | * byte 0: n1 n0 p2 p1 1 p3 R L |
337 | * byte 1: 0 0 0 0 x9 x8 y9 y8 |
338 | */ |
339 | fingers = (packet[0] & 0xc0) >> 6; |
340 | } |
341 | |
342 | if (etd->info.jumpy_cursor) { |
343 | if (fingers != 1) { |
344 | etd->single_finger_reports = 0; |
345 | } else if (etd->single_finger_reports < 2) { |
346 | /* Discard first 2 reports of one finger, bogus */ |
347 | etd->single_finger_reports++; |
348 | elantech_debug("discarding packet\n" ); |
349 | return; |
350 | } |
351 | } |
352 | |
353 | input_report_key(dev, BTN_TOUCH, value: fingers != 0); |
354 | |
355 | /* |
356 | * byte 2: x7 x6 x5 x4 x3 x2 x1 x0 |
357 | * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 |
358 | */ |
359 | if (fingers) { |
360 | input_report_abs(dev, ABS_X, |
361 | value: ((packet[1] & 0x0c) << 6) | packet[2]); |
362 | input_report_abs(dev, ABS_Y, |
363 | value: etd->y_max - (((packet[1] & 0x03) << 8) | packet[3])); |
364 | } |
365 | |
366 | input_report_key(dev, BTN_TOOL_FINGER, value: fingers == 1); |
367 | input_report_key(dev, BTN_TOOL_DOUBLETAP, value: fingers == 2); |
368 | input_report_key(dev, BTN_TOOL_TRIPLETAP, value: fingers == 3); |
369 | |
370 | psmouse_report_standard_buttons(dev, buttons: packet[0]); |
371 | |
372 | if (etd->info.fw_version < 0x020000 && |
373 | (etd->info.capabilities[0] & ETP_CAP_HAS_ROCKER)) { |
374 | /* rocker up */ |
375 | input_report_key(dev, BTN_FORWARD, value: packet[0] & 0x40); |
376 | /* rocker down */ |
377 | input_report_key(dev, BTN_BACK, value: packet[0] & 0x80); |
378 | } |
379 | |
380 | input_sync(dev); |
381 | } |
382 | |
383 | static void elantech_set_slot(struct input_dev *dev, int slot, bool active, |
384 | unsigned int x, unsigned int y) |
385 | { |
386 | input_mt_slot(dev, slot); |
387 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); |
388 | if (active) { |
389 | input_report_abs(dev, ABS_MT_POSITION_X, value: x); |
390 | input_report_abs(dev, ABS_MT_POSITION_Y, value: y); |
391 | } |
392 | } |
393 | |
394 | /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ |
395 | static void elantech_report_semi_mt_data(struct input_dev *dev, |
396 | unsigned int num_fingers, |
397 | unsigned int x1, unsigned int y1, |
398 | unsigned int x2, unsigned int y2) |
399 | { |
400 | elantech_set_slot(dev, slot: 0, active: num_fingers != 0, x: x1, y: y1); |
401 | elantech_set_slot(dev, slot: 1, active: num_fingers >= 2, x: x2, y: y2); |
402 | } |
403 | |
404 | /* |
405 | * Interpret complete data packets and report absolute mode input events for |
406 | * hardware version 2. (6 byte packets) |
407 | */ |
408 | static void elantech_report_absolute_v2(struct psmouse *psmouse) |
409 | { |
410 | struct elantech_data *etd = psmouse->private; |
411 | struct input_dev *dev = psmouse->dev; |
412 | unsigned char *packet = psmouse->packet; |
413 | unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0; |
414 | unsigned int width = 0, pres = 0; |
415 | |
416 | /* byte 0: n1 n0 . . . . R L */ |
417 | fingers = (packet[0] & 0xc0) >> 6; |
418 | |
419 | switch (fingers) { |
420 | case 3: |
421 | /* |
422 | * Same as one finger, except report of more than 3 fingers: |
423 | * byte 3: n4 . w1 w0 . . . . |
424 | */ |
425 | if (packet[3] & 0x80) |
426 | fingers = 4; |
427 | fallthrough; |
428 | case 1: |
429 | /* |
430 | * byte 1: . . . . x11 x10 x9 x8 |
431 | * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 |
432 | */ |
433 | x1 = ((packet[1] & 0x0f) << 8) | packet[2]; |
434 | /* |
435 | * byte 4: . . . . y11 y10 y9 y8 |
436 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 |
437 | */ |
438 | y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); |
439 | |
440 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); |
441 | width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); |
442 | break; |
443 | |
444 | case 2: |
445 | /* |
446 | * The coordinate of each finger is reported separately |
447 | * with a lower resolution for two finger touches: |
448 | * byte 0: . . ay8 ax8 . . . . |
449 | * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 |
450 | */ |
451 | x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2; |
452 | /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ |
453 | y1 = etd->y_max - |
454 | ((((packet[0] & 0x20) << 3) | packet[2]) << 2); |
455 | /* |
456 | * byte 3: . . by8 bx8 . . . . |
457 | * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 |
458 | */ |
459 | x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2; |
460 | /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ |
461 | y2 = etd->y_max - |
462 | ((((packet[3] & 0x20) << 3) | packet[5]) << 2); |
463 | |
464 | /* Unknown so just report sensible values */ |
465 | pres = 127; |
466 | width = 7; |
467 | break; |
468 | } |
469 | |
470 | input_report_key(dev, BTN_TOUCH, value: fingers != 0); |
471 | if (fingers != 0) { |
472 | input_report_abs(dev, ABS_X, value: x1); |
473 | input_report_abs(dev, ABS_Y, value: y1); |
474 | } |
475 | elantech_report_semi_mt_data(dev, num_fingers: fingers, x1, y1, x2, y2); |
476 | input_report_key(dev, BTN_TOOL_FINGER, value: fingers == 1); |
477 | input_report_key(dev, BTN_TOOL_DOUBLETAP, value: fingers == 2); |
478 | input_report_key(dev, BTN_TOOL_TRIPLETAP, value: fingers == 3); |
479 | input_report_key(dev, BTN_TOOL_QUADTAP, value: fingers == 4); |
480 | psmouse_report_standard_buttons(dev, buttons: packet[0]); |
481 | if (etd->info.reports_pressure) { |
482 | input_report_abs(dev, ABS_PRESSURE, value: pres); |
483 | input_report_abs(dev, ABS_TOOL_WIDTH, value: width); |
484 | } |
485 | |
486 | input_sync(dev); |
487 | } |
488 | |
489 | static void elantech_report_trackpoint(struct psmouse *psmouse, |
490 | int packet_type) |
491 | { |
492 | /* |
493 | * byte 0: 0 0 sx sy 0 M R L |
494 | * byte 1:~sx 0 0 0 0 0 0 0 |
495 | * byte 2:~sy 0 0 0 0 0 0 0 |
496 | * byte 3: 0 0 ~sy ~sx 0 1 1 0 |
497 | * byte 4: x7 x6 x5 x4 x3 x2 x1 x0 |
498 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 |
499 | * |
500 | * x and y are written in two's complement spread |
501 | * over 9 bits with sx/sy the relative top bit and |
502 | * x7..x0 and y7..y0 the lower bits. |
503 | * The sign of y is opposite to what the input driver |
504 | * expects for a relative movement |
505 | */ |
506 | |
507 | struct elantech_data *etd = psmouse->private; |
508 | struct input_dev *tp_dev = etd->tp_dev; |
509 | unsigned char *packet = psmouse->packet; |
510 | int x, y; |
511 | u32 t; |
512 | |
513 | t = get_unaligned_le32(p: &packet[0]); |
514 | |
515 | switch (t & ~7U) { |
516 | case 0x06000030U: |
517 | case 0x16008020U: |
518 | case 0x26800010U: |
519 | case 0x36808000U: |
520 | |
521 | /* |
522 | * This firmware misreport coordinates for trackpoint |
523 | * occasionally. Discard packets outside of [-127, 127] range |
524 | * to prevent cursor jumps. |
525 | */ |
526 | if (packet[4] == 0x80 || packet[5] == 0x80 || |
527 | packet[1] >> 7 == packet[4] >> 7 || |
528 | packet[2] >> 7 == packet[5] >> 7) { |
529 | elantech_debug("discarding packet [%6ph]\n" , packet); |
530 | break; |
531 | |
532 | } |
533 | x = packet[4] - (int)((packet[1]^0x80) << 1); |
534 | y = (int)((packet[2]^0x80) << 1) - packet[5]; |
535 | |
536 | psmouse_report_standard_buttons(tp_dev, buttons: packet[0]); |
537 | |
538 | input_report_rel(dev: tp_dev, REL_X, value: x); |
539 | input_report_rel(dev: tp_dev, REL_Y, value: y); |
540 | |
541 | input_sync(dev: tp_dev); |
542 | |
543 | break; |
544 | |
545 | default: |
546 | /* Dump unexpected packet sequences if debug=1 (default) */ |
547 | if (etd->info.debug == 1) |
548 | elantech_packet_dump(psmouse); |
549 | |
550 | break; |
551 | } |
552 | } |
553 | |
554 | /* |
555 | * Interpret complete data packets and report absolute mode input events for |
556 | * hardware version 3. (12 byte packets for two fingers) |
557 | */ |
558 | static void elantech_report_absolute_v3(struct psmouse *psmouse, |
559 | int packet_type) |
560 | { |
561 | struct input_dev *dev = psmouse->dev; |
562 | struct elantech_data *etd = psmouse->private; |
563 | unsigned char *packet = psmouse->packet; |
564 | unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0; |
565 | unsigned int width = 0, pres = 0; |
566 | |
567 | /* byte 0: n1 n0 . . . . R L */ |
568 | fingers = (packet[0] & 0xc0) >> 6; |
569 | |
570 | switch (fingers) { |
571 | case 3: |
572 | case 1: |
573 | /* |
574 | * byte 1: . . . . x11 x10 x9 x8 |
575 | * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 |
576 | */ |
577 | x1 = ((packet[1] & 0x0f) << 8) | packet[2]; |
578 | /* |
579 | * byte 4: . . . . y11 y10 y9 y8 |
580 | * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 |
581 | */ |
582 | y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); |
583 | break; |
584 | |
585 | case 2: |
586 | if (packet_type == PACKET_V3_HEAD) { |
587 | /* |
588 | * byte 1: . . . . ax11 ax10 ax9 ax8 |
589 | * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 |
590 | */ |
591 | etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2]; |
592 | /* |
593 | * byte 4: . . . . ay11 ay10 ay9 ay8 |
594 | * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 |
595 | */ |
596 | etd->mt[0].y = etd->y_max - |
597 | (((packet[4] & 0x0f) << 8) | packet[5]); |
598 | /* |
599 | * wait for next packet |
600 | */ |
601 | return; |
602 | } |
603 | |
604 | /* packet_type == PACKET_V3_TAIL */ |
605 | x1 = etd->mt[0].x; |
606 | y1 = etd->mt[0].y; |
607 | x2 = ((packet[1] & 0x0f) << 8) | packet[2]; |
608 | y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); |
609 | break; |
610 | } |
611 | |
612 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); |
613 | width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); |
614 | |
615 | input_report_key(dev, BTN_TOUCH, value: fingers != 0); |
616 | if (fingers != 0) { |
617 | input_report_abs(dev, ABS_X, value: x1); |
618 | input_report_abs(dev, ABS_Y, value: y1); |
619 | } |
620 | elantech_report_semi_mt_data(dev, num_fingers: fingers, x1, y1, x2, y2); |
621 | input_report_key(dev, BTN_TOOL_FINGER, value: fingers == 1); |
622 | input_report_key(dev, BTN_TOOL_DOUBLETAP, value: fingers == 2); |
623 | input_report_key(dev, BTN_TOOL_TRIPLETAP, value: fingers == 3); |
624 | |
625 | /* For clickpads map both buttons to BTN_LEFT */ |
626 | if (elantech_is_buttonpad(info: &etd->info)) |
627 | input_report_key(dev, BTN_LEFT, value: packet[0] & 0x03); |
628 | else |
629 | psmouse_report_standard_buttons(dev, buttons: packet[0]); |
630 | |
631 | input_report_abs(dev, ABS_PRESSURE, value: pres); |
632 | input_report_abs(dev, ABS_TOOL_WIDTH, value: width); |
633 | |
634 | input_sync(dev); |
635 | } |
636 | |
637 | static void elantech_input_sync_v4(struct psmouse *psmouse) |
638 | { |
639 | struct input_dev *dev = psmouse->dev; |
640 | struct elantech_data *etd = psmouse->private; |
641 | unsigned char *packet = psmouse->packet; |
642 | |
643 | /* For clickpads map both buttons to BTN_LEFT */ |
644 | if (elantech_is_buttonpad(info: &etd->info)) |
645 | input_report_key(dev, BTN_LEFT, value: packet[0] & 0x03); |
646 | else |
647 | psmouse_report_standard_buttons(dev, buttons: packet[0]); |
648 | |
649 | input_mt_report_pointer_emulation(dev, use_count: true); |
650 | input_sync(dev); |
651 | } |
652 | |
653 | static void process_packet_status_v4(struct psmouse *psmouse) |
654 | { |
655 | struct input_dev *dev = psmouse->dev; |
656 | unsigned char *packet = psmouse->packet; |
657 | unsigned fingers; |
658 | int i; |
659 | |
660 | /* notify finger state change */ |
661 | fingers = packet[1] & 0x1f; |
662 | for (i = 0; i < ETP_MAX_FINGERS; i++) { |
663 | if ((fingers & (1 << i)) == 0) { |
664 | input_mt_slot(dev, slot: i); |
665 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, active: false); |
666 | } |
667 | } |
668 | |
669 | elantech_input_sync_v4(psmouse); |
670 | } |
671 | |
672 | static void process_packet_head_v4(struct psmouse *psmouse) |
673 | { |
674 | struct input_dev *dev = psmouse->dev; |
675 | struct elantech_data *etd = psmouse->private; |
676 | unsigned char *packet = psmouse->packet; |
677 | int id; |
678 | int pres, traces; |
679 | |
680 | id = ((packet[3] & 0xe0) >> 5) - 1; |
681 | if (id < 0 || id >= ETP_MAX_FINGERS) |
682 | return; |
683 | |
684 | etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2]; |
685 | etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); |
686 | pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); |
687 | traces = (packet[0] & 0xf0) >> 4; |
688 | |
689 | input_mt_slot(dev, slot: id); |
690 | input_mt_report_slot_state(dev, MT_TOOL_FINGER, active: true); |
691 | |
692 | input_report_abs(dev, ABS_MT_POSITION_X, value: etd->mt[id].x); |
693 | input_report_abs(dev, ABS_MT_POSITION_Y, value: etd->mt[id].y); |
694 | input_report_abs(dev, ABS_MT_PRESSURE, value: pres); |
695 | input_report_abs(dev, ABS_MT_TOUCH_MAJOR, value: traces * etd->width); |
696 | /* report this for backwards compatibility */ |
697 | input_report_abs(dev, ABS_TOOL_WIDTH, value: traces); |
698 | |
699 | elantech_input_sync_v4(psmouse); |
700 | } |
701 | |
702 | static void process_packet_motion_v4(struct psmouse *psmouse) |
703 | { |
704 | struct input_dev *dev = psmouse->dev; |
705 | struct elantech_data *etd = psmouse->private; |
706 | unsigned char *packet = psmouse->packet; |
707 | int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0; |
708 | int id, sid; |
709 | |
710 | id = ((packet[0] & 0xe0) >> 5) - 1; |
711 | if (id < 0 || id >= ETP_MAX_FINGERS) |
712 | return; |
713 | |
714 | sid = ((packet[3] & 0xe0) >> 5) - 1; |
715 | weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1; |
716 | /* |
717 | * Motion packets give us the delta of x, y values of specific fingers, |
718 | * but in two's complement. Let the compiler do the conversion for us. |
719 | * Also _enlarge_ the numbers to int, in case of overflow. |
720 | */ |
721 | delta_x1 = (signed char)packet[1]; |
722 | delta_y1 = (signed char)packet[2]; |
723 | delta_x2 = (signed char)packet[4]; |
724 | delta_y2 = (signed char)packet[5]; |
725 | |
726 | etd->mt[id].x += delta_x1 * weight; |
727 | etd->mt[id].y -= delta_y1 * weight; |
728 | input_mt_slot(dev, slot: id); |
729 | input_report_abs(dev, ABS_MT_POSITION_X, value: etd->mt[id].x); |
730 | input_report_abs(dev, ABS_MT_POSITION_Y, value: etd->mt[id].y); |
731 | |
732 | if (sid >= 0 && sid < ETP_MAX_FINGERS) { |
733 | etd->mt[sid].x += delta_x2 * weight; |
734 | etd->mt[sid].y -= delta_y2 * weight; |
735 | input_mt_slot(dev, slot: sid); |
736 | input_report_abs(dev, ABS_MT_POSITION_X, value: etd->mt[sid].x); |
737 | input_report_abs(dev, ABS_MT_POSITION_Y, value: etd->mt[sid].y); |
738 | } |
739 | |
740 | elantech_input_sync_v4(psmouse); |
741 | } |
742 | |
743 | static void elantech_report_absolute_v4(struct psmouse *psmouse, |
744 | int packet_type) |
745 | { |
746 | switch (packet_type) { |
747 | case PACKET_V4_STATUS: |
748 | process_packet_status_v4(psmouse); |
749 | break; |
750 | |
751 | case PACKET_V4_HEAD: |
752 | process_packet_head_v4(psmouse); |
753 | break; |
754 | |
755 | case PACKET_V4_MOTION: |
756 | process_packet_motion_v4(psmouse); |
757 | break; |
758 | |
759 | case PACKET_UNKNOWN: |
760 | default: |
761 | /* impossible to get here */ |
762 | break; |
763 | } |
764 | } |
765 | |
766 | static int elantech_packet_check_v1(struct psmouse *psmouse) |
767 | { |
768 | struct elantech_data *etd = psmouse->private; |
769 | unsigned char *packet = psmouse->packet; |
770 | unsigned char p1, p2, p3; |
771 | |
772 | /* Parity bits are placed differently */ |
773 | if (etd->info.fw_version < 0x020000) { |
774 | /* byte 0: D U p1 p2 1 p3 R L */ |
775 | p1 = (packet[0] & 0x20) >> 5; |
776 | p2 = (packet[0] & 0x10) >> 4; |
777 | } else { |
778 | /* byte 0: n1 n0 p2 p1 1 p3 R L */ |
779 | p1 = (packet[0] & 0x10) >> 4; |
780 | p2 = (packet[0] & 0x20) >> 5; |
781 | } |
782 | |
783 | p3 = (packet[0] & 0x04) >> 2; |
784 | |
785 | return etd->parity[packet[1]] == p1 && |
786 | etd->parity[packet[2]] == p2 && |
787 | etd->parity[packet[3]] == p3; |
788 | } |
789 | |
790 | static int elantech_debounce_check_v2(struct psmouse *psmouse) |
791 | { |
792 | /* |
793 | * When we encounter packet that matches this exactly, it means the |
794 | * hardware is in debounce status. Just ignore the whole packet. |
795 | */ |
796 | static const u8 debounce_packet[] = { |
797 | 0x84, 0xff, 0xff, 0x02, 0xff, 0xff |
798 | }; |
799 | unsigned char *packet = psmouse->packet; |
800 | |
801 | return !memcmp(p: packet, q: debounce_packet, size: sizeof(debounce_packet)); |
802 | } |
803 | |
804 | static int elantech_packet_check_v2(struct psmouse *psmouse) |
805 | { |
806 | struct elantech_data *etd = psmouse->private; |
807 | unsigned char *packet = psmouse->packet; |
808 | |
809 | /* |
810 | * V2 hardware has two flavors. Older ones that do not report pressure, |
811 | * and newer ones that reports pressure and width. With newer ones, all |
812 | * packets (1, 2, 3 finger touch) have the same constant bits. With |
813 | * older ones, 1/3 finger touch packets and 2 finger touch packets |
814 | * have different constant bits. |
815 | * With all three cases, if the constant bits are not exactly what I |
816 | * expected, I consider them invalid. |
817 | */ |
818 | if (etd->info.reports_pressure) |
819 | return (packet[0] & 0x0c) == 0x04 && |
820 | (packet[3] & 0x0f) == 0x02; |
821 | |
822 | if ((packet[0] & 0xc0) == 0x80) |
823 | return (packet[0] & 0x0c) == 0x0c && |
824 | (packet[3] & 0x0e) == 0x08; |
825 | |
826 | return (packet[0] & 0x3c) == 0x3c && |
827 | (packet[1] & 0xf0) == 0x00 && |
828 | (packet[3] & 0x3e) == 0x38 && |
829 | (packet[4] & 0xf0) == 0x00; |
830 | } |
831 | |
832 | /* |
833 | * We check the constant bits to determine what packet type we get, |
834 | * so packet checking is mandatory for v3 and later hardware. |
835 | */ |
836 | static int elantech_packet_check_v3(struct psmouse *psmouse) |
837 | { |
838 | struct elantech_data *etd = psmouse->private; |
839 | static const u8 debounce_packet[] = { |
840 | 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff |
841 | }; |
842 | unsigned char *packet = psmouse->packet; |
843 | |
844 | /* |
845 | * check debounce first, it has the same signature in byte 0 |
846 | * and byte 3 as PACKET_V3_HEAD. |
847 | */ |
848 | if (!memcmp(p: packet, q: debounce_packet, size: sizeof(debounce_packet))) |
849 | return PACKET_DEBOUNCE; |
850 | |
851 | /* |
852 | * If the hardware flag 'crc_enabled' is set the packets have |
853 | * different signatures. |
854 | */ |
855 | if (etd->info.crc_enabled) { |
856 | if ((packet[3] & 0x09) == 0x08) |
857 | return PACKET_V3_HEAD; |
858 | |
859 | if ((packet[3] & 0x09) == 0x09) |
860 | return PACKET_V3_TAIL; |
861 | } else { |
862 | if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02) |
863 | return PACKET_V3_HEAD; |
864 | |
865 | if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c) |
866 | return PACKET_V3_TAIL; |
867 | if ((packet[3] & 0x0f) == 0x06) |
868 | return PACKET_TRACKPOINT; |
869 | } |
870 | |
871 | return PACKET_UNKNOWN; |
872 | } |
873 | |
874 | static int elantech_packet_check_v4(struct psmouse *psmouse) |
875 | { |
876 | struct elantech_data *etd = psmouse->private; |
877 | unsigned char *packet = psmouse->packet; |
878 | unsigned char packet_type = packet[3] & 0x03; |
879 | unsigned int ic_version; |
880 | bool sanity_check; |
881 | |
882 | if (etd->tp_dev && (packet[3] & 0x0f) == 0x06) |
883 | return PACKET_TRACKPOINT; |
884 | |
885 | /* This represents the version of IC body. */ |
886 | ic_version = (etd->info.fw_version & 0x0f0000) >> 16; |
887 | |
888 | /* |
889 | * Sanity check based on the constant bits of a packet. |
890 | * The constant bits change depending on the value of |
891 | * the hardware flag 'crc_enabled' and the version of |
892 | * the IC body, but are the same for every packet, |
893 | * regardless of the type. |
894 | */ |
895 | if (etd->info.crc_enabled) |
896 | sanity_check = ((packet[3] & 0x08) == 0x00); |
897 | else if (ic_version == 7 && etd->info.samples[1] == 0x2A) |
898 | sanity_check = ((packet[3] & 0x1c) == 0x10); |
899 | else |
900 | sanity_check = ((packet[0] & 0x08) == 0x00 && |
901 | (packet[3] & 0x1c) == 0x10); |
902 | |
903 | if (!sanity_check) |
904 | return PACKET_UNKNOWN; |
905 | |
906 | switch (packet_type) { |
907 | case 0: |
908 | return PACKET_V4_STATUS; |
909 | |
910 | case 1: |
911 | return PACKET_V4_HEAD; |
912 | |
913 | case 2: |
914 | return PACKET_V4_MOTION; |
915 | } |
916 | |
917 | return PACKET_UNKNOWN; |
918 | } |
919 | |
920 | /* |
921 | * Process byte stream from mouse and handle complete packets |
922 | */ |
923 | static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) |
924 | { |
925 | struct elantech_data *etd = psmouse->private; |
926 | int packet_type; |
927 | |
928 | if (psmouse->pktcnt < psmouse->pktsize) |
929 | return PSMOUSE_GOOD_DATA; |
930 | |
931 | if (etd->info.debug > 1) |
932 | elantech_packet_dump(psmouse); |
933 | |
934 | switch (etd->info.hw_version) { |
935 | case 1: |
936 | if (etd->info.paritycheck && !elantech_packet_check_v1(psmouse)) |
937 | return PSMOUSE_BAD_DATA; |
938 | |
939 | elantech_report_absolute_v1(psmouse); |
940 | break; |
941 | |
942 | case 2: |
943 | /* ignore debounce */ |
944 | if (elantech_debounce_check_v2(psmouse)) |
945 | return PSMOUSE_FULL_PACKET; |
946 | |
947 | if (etd->info.paritycheck && !elantech_packet_check_v2(psmouse)) |
948 | return PSMOUSE_BAD_DATA; |
949 | |
950 | elantech_report_absolute_v2(psmouse); |
951 | break; |
952 | |
953 | case 3: |
954 | packet_type = elantech_packet_check_v3(psmouse); |
955 | switch (packet_type) { |
956 | case PACKET_UNKNOWN: |
957 | return PSMOUSE_BAD_DATA; |
958 | |
959 | case PACKET_DEBOUNCE: |
960 | /* ignore debounce */ |
961 | break; |
962 | |
963 | case PACKET_TRACKPOINT: |
964 | elantech_report_trackpoint(psmouse, packet_type); |
965 | break; |
966 | |
967 | default: |
968 | elantech_report_absolute_v3(psmouse, packet_type); |
969 | break; |
970 | } |
971 | |
972 | break; |
973 | |
974 | case 4: |
975 | packet_type = elantech_packet_check_v4(psmouse); |
976 | switch (packet_type) { |
977 | case PACKET_UNKNOWN: |
978 | return PSMOUSE_BAD_DATA; |
979 | |
980 | case PACKET_TRACKPOINT: |
981 | elantech_report_trackpoint(psmouse, packet_type); |
982 | break; |
983 | |
984 | default: |
985 | elantech_report_absolute_v4(psmouse, packet_type); |
986 | break; |
987 | } |
988 | |
989 | break; |
990 | } |
991 | |
992 | return PSMOUSE_FULL_PACKET; |
993 | } |
994 | |
995 | /* |
996 | * This writes the reg_07 value again to the hardware at the end of every |
997 | * set_rate call because the register loses its value. reg_07 allows setting |
998 | * absolute mode on v4 hardware |
999 | */ |
1000 | static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse, |
1001 | unsigned int rate) |
1002 | { |
1003 | struct elantech_data *etd = psmouse->private; |
1004 | |
1005 | etd->original_set_rate(psmouse, rate); |
1006 | if (elantech_write_reg(psmouse, reg: 0x07, val: etd->reg_07)) |
1007 | psmouse_err(psmouse, "restoring reg_07 failed\n" ); |
1008 | } |
1009 | |
1010 | /* |
1011 | * Put the touchpad into absolute mode |
1012 | */ |
1013 | static int elantech_set_absolute_mode(struct psmouse *psmouse) |
1014 | { |
1015 | struct elantech_data *etd = psmouse->private; |
1016 | unsigned char val; |
1017 | int tries = ETP_READ_BACK_TRIES; |
1018 | int rc = 0; |
1019 | |
1020 | switch (etd->info.hw_version) { |
1021 | case 1: |
1022 | etd->reg_10 = 0x16; |
1023 | etd->reg_11 = 0x8f; |
1024 | if (elantech_write_reg(psmouse, reg: 0x10, val: etd->reg_10) || |
1025 | elantech_write_reg(psmouse, reg: 0x11, val: etd->reg_11)) { |
1026 | rc = -1; |
1027 | } |
1028 | break; |
1029 | |
1030 | case 2: |
1031 | /* Windows driver values */ |
1032 | etd->reg_10 = 0x54; |
1033 | etd->reg_11 = 0x88; /* 0x8a */ |
1034 | etd->reg_21 = 0x60; /* 0x00 */ |
1035 | if (elantech_write_reg(psmouse, reg: 0x10, val: etd->reg_10) || |
1036 | elantech_write_reg(psmouse, reg: 0x11, val: etd->reg_11) || |
1037 | elantech_write_reg(psmouse, reg: 0x21, val: etd->reg_21)) { |
1038 | rc = -1; |
1039 | } |
1040 | break; |
1041 | |
1042 | case 3: |
1043 | if (etd->info.set_hw_resolution) |
1044 | etd->reg_10 = 0x0b; |
1045 | else |
1046 | etd->reg_10 = 0x01; |
1047 | |
1048 | if (elantech_write_reg(psmouse, reg: 0x10, val: etd->reg_10)) |
1049 | rc = -1; |
1050 | |
1051 | break; |
1052 | |
1053 | case 4: |
1054 | etd->reg_07 = 0x01; |
1055 | if (elantech_write_reg(psmouse, reg: 0x07, val: etd->reg_07)) |
1056 | rc = -1; |
1057 | |
1058 | goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */ |
1059 | } |
1060 | |
1061 | if (rc == 0) { |
1062 | /* |
1063 | * Read back reg 0x10. For hardware version 1 we must make |
1064 | * sure the absolute mode bit is set. For hardware version 2 |
1065 | * the touchpad is probably initializing and not ready until |
1066 | * we read back the value we just wrote. |
1067 | */ |
1068 | do { |
1069 | rc = elantech_read_reg(psmouse, reg: 0x10, val: &val); |
1070 | if (rc == 0) |
1071 | break; |
1072 | tries--; |
1073 | elantech_debug("retrying read (%d).\n" , tries); |
1074 | msleep(ETP_READ_BACK_DELAY); |
1075 | } while (tries > 0); |
1076 | |
1077 | if (rc) { |
1078 | psmouse_err(psmouse, |
1079 | "failed to read back register 0x10.\n" ); |
1080 | } else if (etd->info.hw_version == 1 && |
1081 | !(val & ETP_R10_ABSOLUTE_MODE)) { |
1082 | psmouse_err(psmouse, |
1083 | "touchpad refuses to switch to absolute mode.\n" ); |
1084 | rc = -1; |
1085 | } |
1086 | } |
1087 | |
1088 | skip_readback_reg_10: |
1089 | if (rc) |
1090 | psmouse_err(psmouse, "failed to initialise registers.\n" ); |
1091 | |
1092 | return rc; |
1093 | } |
1094 | |
1095 | /* |
1096 | * (value from firmware) * 10 + 790 = dpi |
1097 | * we also have to convert dpi to dots/mm (*10/254 to avoid floating point) |
1098 | */ |
1099 | static unsigned int elantech_convert_res(unsigned int val) |
1100 | { |
1101 | return (val * 10 + 790) * 10 / 254; |
1102 | } |
1103 | |
1104 | static int elantech_get_resolution_v4(struct psmouse *psmouse, |
1105 | unsigned int *x_res, |
1106 | unsigned int *y_res, |
1107 | unsigned int *bus) |
1108 | { |
1109 | unsigned char param[3]; |
1110 | |
1111 | if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param)) |
1112 | return -1; |
1113 | |
1114 | *x_res = elantech_convert_res(val: param[1] & 0x0f); |
1115 | *y_res = elantech_convert_res(val: (param[1] & 0xf0) >> 4); |
1116 | *bus = param[2]; |
1117 | |
1118 | return 0; |
1119 | } |
1120 | |
1121 | static void elantech_set_buttonpad_prop(struct psmouse *psmouse) |
1122 | { |
1123 | struct input_dev *dev = psmouse->dev; |
1124 | struct elantech_data *etd = psmouse->private; |
1125 | |
1126 | if (elantech_is_buttonpad(info: &etd->info)) { |
1127 | __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); |
1128 | __clear_bit(BTN_RIGHT, dev->keybit); |
1129 | } |
1130 | } |
1131 | |
1132 | /* |
1133 | * Some hw_version 4 models do have a middle button |
1134 | */ |
1135 | static const struct dmi_system_id elantech_dmi_has_middle_button[] = { |
1136 | #if defined(CONFIG_DMI) && defined(CONFIG_X86) |
1137 | { |
1138 | /* Fujitsu H730 has a middle button */ |
1139 | .matches = { |
1140 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1141 | DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730" ), |
1142 | }, |
1143 | }, |
1144 | { |
1145 | /* Fujitsu H760 also has a middle button */ |
1146 | .matches = { |
1147 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1148 | DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760" ), |
1149 | }, |
1150 | }, |
1151 | { |
1152 | /* Fujitsu H780 also has a middle button */ |
1153 | .matches = { |
1154 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1155 | DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H780" ), |
1156 | }, |
1157 | }, |
1158 | #endif |
1159 | { } |
1160 | }; |
1161 | |
1162 | /* |
1163 | * Set the appropriate event bits for the input subsystem |
1164 | */ |
1165 | static int elantech_set_input_params(struct psmouse *psmouse) |
1166 | { |
1167 | struct input_dev *dev = psmouse->dev; |
1168 | struct elantech_data *etd = psmouse->private; |
1169 | struct elantech_device_info *info = &etd->info; |
1170 | unsigned int x_min = info->x_min, y_min = info->y_min, |
1171 | x_max = info->x_max, y_max = info->y_max, |
1172 | width = info->width; |
1173 | |
1174 | __set_bit(INPUT_PROP_POINTER, dev->propbit); |
1175 | __set_bit(EV_KEY, dev->evbit); |
1176 | __set_bit(EV_ABS, dev->evbit); |
1177 | __clear_bit(EV_REL, dev->evbit); |
1178 | |
1179 | __set_bit(BTN_LEFT, dev->keybit); |
1180 | if (info->has_middle_button) |
1181 | __set_bit(BTN_MIDDLE, dev->keybit); |
1182 | __set_bit(BTN_RIGHT, dev->keybit); |
1183 | |
1184 | __set_bit(BTN_TOUCH, dev->keybit); |
1185 | __set_bit(BTN_TOOL_FINGER, dev->keybit); |
1186 | __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); |
1187 | __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); |
1188 | |
1189 | switch (info->hw_version) { |
1190 | case 1: |
1191 | /* Rocker button */ |
1192 | if (info->fw_version < 0x020000 && |
1193 | (info->capabilities[0] & ETP_CAP_HAS_ROCKER)) { |
1194 | __set_bit(BTN_FORWARD, dev->keybit); |
1195 | __set_bit(BTN_BACK, dev->keybit); |
1196 | } |
1197 | input_set_abs_params(dev, ABS_X, min: x_min, max: x_max, fuzz: 0, flat: 0); |
1198 | input_set_abs_params(dev, ABS_Y, min: y_min, max: y_max, fuzz: 0, flat: 0); |
1199 | break; |
1200 | |
1201 | case 2: |
1202 | __set_bit(BTN_TOOL_QUADTAP, dev->keybit); |
1203 | __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); |
1204 | fallthrough; |
1205 | case 3: |
1206 | if (info->hw_version == 3) |
1207 | elantech_set_buttonpad_prop(psmouse); |
1208 | input_set_abs_params(dev, ABS_X, min: x_min, max: x_max, fuzz: 0, flat: 0); |
1209 | input_set_abs_params(dev, ABS_Y, min: y_min, max: y_max, fuzz: 0, flat: 0); |
1210 | if (info->reports_pressure) { |
1211 | input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, |
1212 | ETP_PMAX_V2, fuzz: 0, flat: 0); |
1213 | input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, |
1214 | ETP_WMAX_V2, fuzz: 0, flat: 0); |
1215 | } |
1216 | input_mt_init_slots(dev, num_slots: 2, INPUT_MT_SEMI_MT); |
1217 | input_set_abs_params(dev, ABS_MT_POSITION_X, min: x_min, max: x_max, fuzz: 0, flat: 0); |
1218 | input_set_abs_params(dev, ABS_MT_POSITION_Y, min: y_min, max: y_max, fuzz: 0, flat: 0); |
1219 | break; |
1220 | |
1221 | case 4: |
1222 | elantech_set_buttonpad_prop(psmouse); |
1223 | __set_bit(BTN_TOOL_QUADTAP, dev->keybit); |
1224 | /* For X to recognize me as touchpad. */ |
1225 | input_set_abs_params(dev, ABS_X, min: x_min, max: x_max, fuzz: 0, flat: 0); |
1226 | input_set_abs_params(dev, ABS_Y, min: y_min, max: y_max, fuzz: 0, flat: 0); |
1227 | /* |
1228 | * range of pressure and width is the same as v2, |
1229 | * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility. |
1230 | */ |
1231 | input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, |
1232 | ETP_PMAX_V2, fuzz: 0, flat: 0); |
1233 | input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, |
1234 | ETP_WMAX_V2, fuzz: 0, flat: 0); |
1235 | /* Multitouch capable pad, up to 5 fingers. */ |
1236 | input_mt_init_slots(dev, ETP_MAX_FINGERS, flags: 0); |
1237 | input_set_abs_params(dev, ABS_MT_POSITION_X, min: x_min, max: x_max, fuzz: 0, flat: 0); |
1238 | input_set_abs_params(dev, ABS_MT_POSITION_Y, min: y_min, max: y_max, fuzz: 0, flat: 0); |
1239 | input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2, |
1240 | ETP_PMAX_V2, fuzz: 0, flat: 0); |
1241 | /* |
1242 | * The firmware reports how many trace lines the finger spans, |
1243 | * convert to surface unit as Protocol-B requires. |
1244 | */ |
1245 | input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, min: 0, |
1246 | ETP_WMAX_V2 * width, fuzz: 0, flat: 0); |
1247 | break; |
1248 | } |
1249 | |
1250 | input_abs_set_res(dev, ABS_X, val: info->x_res); |
1251 | input_abs_set_res(dev, ABS_Y, val: info->y_res); |
1252 | if (info->hw_version > 1) { |
1253 | input_abs_set_res(dev, ABS_MT_POSITION_X, val: info->x_res); |
1254 | input_abs_set_res(dev, ABS_MT_POSITION_Y, val: info->y_res); |
1255 | } |
1256 | |
1257 | etd->y_max = y_max; |
1258 | etd->width = width; |
1259 | |
1260 | return 0; |
1261 | } |
1262 | |
1263 | struct elantech_attr_data { |
1264 | size_t field_offset; |
1265 | unsigned char reg; |
1266 | }; |
1267 | |
1268 | /* |
1269 | * Display a register value by reading a sysfs entry |
1270 | */ |
1271 | static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, |
1272 | char *buf) |
1273 | { |
1274 | struct elantech_data *etd = psmouse->private; |
1275 | struct elantech_attr_data *attr = data; |
1276 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; |
1277 | int rc = 0; |
1278 | |
1279 | if (attr->reg) |
1280 | rc = elantech_read_reg(psmouse, reg: attr->reg, val: reg); |
1281 | |
1282 | return sprintf(buf, fmt: "0x%02x\n" , (attr->reg && rc) ? -1 : *reg); |
1283 | } |
1284 | |
1285 | /* |
1286 | * Write a register value by writing a sysfs entry |
1287 | */ |
1288 | static ssize_t elantech_set_int_attr(struct psmouse *psmouse, |
1289 | void *data, const char *buf, size_t count) |
1290 | { |
1291 | struct elantech_data *etd = psmouse->private; |
1292 | struct elantech_attr_data *attr = data; |
1293 | unsigned char *reg = (unsigned char *) etd + attr->field_offset; |
1294 | unsigned char value; |
1295 | int err; |
1296 | |
1297 | err = kstrtou8(s: buf, base: 16, res: &value); |
1298 | if (err) |
1299 | return err; |
1300 | |
1301 | /* Do we need to preserve some bits for version 2 hardware too? */ |
1302 | if (etd->info.hw_version == 1) { |
1303 | if (attr->reg == 0x10) |
1304 | /* Force absolute mode always on */ |
1305 | value |= ETP_R10_ABSOLUTE_MODE; |
1306 | else if (attr->reg == 0x11) |
1307 | /* Force 4 byte mode always on */ |
1308 | value |= ETP_R11_4_BYTE_MODE; |
1309 | } |
1310 | |
1311 | if (!attr->reg || elantech_write_reg(psmouse, reg: attr->reg, val: value) == 0) |
1312 | *reg = value; |
1313 | |
1314 | return count; |
1315 | } |
1316 | |
1317 | #define ELANTECH_INT_ATTR(_name, _register) \ |
1318 | static struct elantech_attr_data elantech_attr_##_name = { \ |
1319 | .field_offset = offsetof(struct elantech_data, _name), \ |
1320 | .reg = _register, \ |
1321 | }; \ |
1322 | PSMOUSE_DEFINE_ATTR(_name, 0644, \ |
1323 | &elantech_attr_##_name, \ |
1324 | elantech_show_int_attr, \ |
1325 | elantech_set_int_attr) |
1326 | |
1327 | #define ELANTECH_INFO_ATTR(_name) \ |
1328 | static struct elantech_attr_data elantech_attr_##_name = { \ |
1329 | .field_offset = offsetof(struct elantech_data, info) + \ |
1330 | offsetof(struct elantech_device_info, _name), \ |
1331 | .reg = 0, \ |
1332 | }; \ |
1333 | PSMOUSE_DEFINE_ATTR(_name, 0644, \ |
1334 | &elantech_attr_##_name, \ |
1335 | elantech_show_int_attr, \ |
1336 | elantech_set_int_attr) |
1337 | |
1338 | ELANTECH_INT_ATTR(reg_07, 0x07); |
1339 | ELANTECH_INT_ATTR(reg_10, 0x10); |
1340 | ELANTECH_INT_ATTR(reg_11, 0x11); |
1341 | ELANTECH_INT_ATTR(reg_20, 0x20); |
1342 | ELANTECH_INT_ATTR(reg_21, 0x21); |
1343 | ELANTECH_INT_ATTR(reg_22, 0x22); |
1344 | ELANTECH_INT_ATTR(reg_23, 0x23); |
1345 | ELANTECH_INT_ATTR(reg_24, 0x24); |
1346 | ELANTECH_INT_ATTR(reg_25, 0x25); |
1347 | ELANTECH_INT_ATTR(reg_26, 0x26); |
1348 | ELANTECH_INFO_ATTR(debug); |
1349 | ELANTECH_INFO_ATTR(paritycheck); |
1350 | ELANTECH_INFO_ATTR(crc_enabled); |
1351 | |
1352 | static struct attribute *elantech_attrs[] = { |
1353 | &psmouse_attr_reg_07.dattr.attr, |
1354 | &psmouse_attr_reg_10.dattr.attr, |
1355 | &psmouse_attr_reg_11.dattr.attr, |
1356 | &psmouse_attr_reg_20.dattr.attr, |
1357 | &psmouse_attr_reg_21.dattr.attr, |
1358 | &psmouse_attr_reg_22.dattr.attr, |
1359 | &psmouse_attr_reg_23.dattr.attr, |
1360 | &psmouse_attr_reg_24.dattr.attr, |
1361 | &psmouse_attr_reg_25.dattr.attr, |
1362 | &psmouse_attr_reg_26.dattr.attr, |
1363 | &psmouse_attr_debug.dattr.attr, |
1364 | &psmouse_attr_paritycheck.dattr.attr, |
1365 | &psmouse_attr_crc_enabled.dattr.attr, |
1366 | NULL |
1367 | }; |
1368 | |
1369 | static const struct attribute_group elantech_attr_group = { |
1370 | .attrs = elantech_attrs, |
1371 | }; |
1372 | |
1373 | static bool elantech_is_signature_valid(const unsigned char *param) |
1374 | { |
1375 | static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 }; |
1376 | int i; |
1377 | |
1378 | if (param[0] == 0) |
1379 | return false; |
1380 | |
1381 | if (param[1] == 0) |
1382 | return true; |
1383 | |
1384 | /* |
1385 | * Some hw_version >= 4 models have a revision higher then 20. Meaning |
1386 | * that param[2] may be 10 or 20, skip the rates check for these. |
1387 | */ |
1388 | if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f && |
1389 | param[2] < 40) |
1390 | return true; |
1391 | |
1392 | for (i = 0; i < ARRAY_SIZE(rates); i++) |
1393 | if (param[2] == rates[i]) |
1394 | return false; |
1395 | |
1396 | return true; |
1397 | } |
1398 | |
1399 | /* |
1400 | * Use magic knock to detect Elantech touchpad |
1401 | */ |
1402 | int elantech_detect(struct psmouse *psmouse, bool set_properties) |
1403 | { |
1404 | struct ps2dev *ps2dev = &psmouse->ps2dev; |
1405 | unsigned char param[3]; |
1406 | |
1407 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); |
1408 | |
1409 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || |
1410 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || |
1411 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || |
1412 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || |
1413 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { |
1414 | psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n" ); |
1415 | return -1; |
1416 | } |
1417 | |
1418 | /* |
1419 | * Report this in case there are Elantech models that use a different |
1420 | * set of magic numbers |
1421 | */ |
1422 | if (param[0] != 0x3c || param[1] != 0x03 || |
1423 | (param[2] != 0xc8 && param[2] != 0x00)) { |
1424 | psmouse_dbg(psmouse, |
1425 | "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n" , |
1426 | param[0], param[1], param[2]); |
1427 | return -1; |
1428 | } |
1429 | |
1430 | /* |
1431 | * Query touchpad's firmware version and see if it reports known |
1432 | * value to avoid mis-detection. Logitech mice are known to respond |
1433 | * to Elantech magic knock and there might be more. |
1434 | */ |
1435 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { |
1436 | psmouse_dbg(psmouse, "failed to query firmware version.\n" ); |
1437 | return -1; |
1438 | } |
1439 | |
1440 | psmouse_dbg(psmouse, |
1441 | "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n" , |
1442 | param[0], param[1], param[2]); |
1443 | |
1444 | if (!elantech_is_signature_valid(param)) { |
1445 | psmouse_dbg(psmouse, |
1446 | "Probably not a real Elantech touchpad. Aborting.\n" ); |
1447 | return -1; |
1448 | } |
1449 | |
1450 | if (set_properties) { |
1451 | psmouse->vendor = "Elantech" ; |
1452 | psmouse->name = "Touchpad" ; |
1453 | } |
1454 | |
1455 | return 0; |
1456 | } |
1457 | |
1458 | /* |
1459 | * Clean up sysfs entries when disconnecting |
1460 | */ |
1461 | static void elantech_disconnect(struct psmouse *psmouse) |
1462 | { |
1463 | struct elantech_data *etd = psmouse->private; |
1464 | |
1465 | /* |
1466 | * We might have left a breadcrumb when trying to |
1467 | * set up SMbus companion. |
1468 | */ |
1469 | psmouse_smbus_cleanup(psmouse); |
1470 | |
1471 | if (etd->tp_dev) |
1472 | input_unregister_device(etd->tp_dev); |
1473 | sysfs_remove_group(kobj: &psmouse->ps2dev.serio->dev.kobj, |
1474 | grp: &elantech_attr_group); |
1475 | kfree(objp: psmouse->private); |
1476 | psmouse->private = NULL; |
1477 | } |
1478 | |
1479 | /* |
1480 | * Put the touchpad back into absolute mode when reconnecting |
1481 | */ |
1482 | static int elantech_reconnect(struct psmouse *psmouse) |
1483 | { |
1484 | psmouse_reset(psmouse); |
1485 | |
1486 | if (elantech_detect(psmouse, set_properties: 0)) |
1487 | return -1; |
1488 | |
1489 | if (elantech_set_absolute_mode(psmouse)) { |
1490 | psmouse_err(psmouse, |
1491 | "failed to put touchpad back into absolute mode.\n" ); |
1492 | return -1; |
1493 | } |
1494 | |
1495 | return 0; |
1496 | } |
1497 | |
1498 | /* |
1499 | * Some hw_version 4 models do not work with crc_disabled |
1500 | */ |
1501 | static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = { |
1502 | #if defined(CONFIG_DMI) && defined(CONFIG_X86) |
1503 | { |
1504 | /* Fujitsu H730 does not work with crc_enabled == 0 */ |
1505 | .matches = { |
1506 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1507 | DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730" ), |
1508 | }, |
1509 | }, |
1510 | { |
1511 | /* Fujitsu H760 does not work with crc_enabled == 0 */ |
1512 | .matches = { |
1513 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1514 | DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760" ), |
1515 | }, |
1516 | }, |
1517 | { |
1518 | /* Fujitsu LIFEBOOK E544 does not work with crc_enabled == 0 */ |
1519 | .matches = { |
1520 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1521 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544" ), |
1522 | }, |
1523 | }, |
1524 | { |
1525 | /* Fujitsu LIFEBOOK E546 does not work with crc_enabled == 0 */ |
1526 | .matches = { |
1527 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1528 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E546" ), |
1529 | }, |
1530 | }, |
1531 | { |
1532 | /* Fujitsu LIFEBOOK E547 does not work with crc_enabled == 0 */ |
1533 | .matches = { |
1534 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1535 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E547" ), |
1536 | }, |
1537 | }, |
1538 | { |
1539 | /* Fujitsu LIFEBOOK E554 does not work with crc_enabled == 0 */ |
1540 | .matches = { |
1541 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1542 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E554" ), |
1543 | }, |
1544 | }, |
1545 | { |
1546 | /* Fujitsu LIFEBOOK E556 does not work with crc_enabled == 0 */ |
1547 | .matches = { |
1548 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1549 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E556" ), |
1550 | }, |
1551 | }, |
1552 | { |
1553 | /* Fujitsu LIFEBOOK E557 does not work with crc_enabled == 0 */ |
1554 | .matches = { |
1555 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1556 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E557" ), |
1557 | }, |
1558 | }, |
1559 | { |
1560 | /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */ |
1561 | .matches = { |
1562 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU" ), |
1563 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745" ), |
1564 | }, |
1565 | }, |
1566 | #endif |
1567 | { } |
1568 | }; |
1569 | |
1570 | /* |
1571 | * Some hw_version 3 models go into error state when we try to set |
1572 | * bit 3 and/or bit 1 of r10. |
1573 | */ |
1574 | static const struct dmi_system_id no_hw_res_dmi_table[] = { |
1575 | #if defined(CONFIG_DMI) && defined(CONFIG_X86) |
1576 | { |
1577 | /* Gigabyte U2442 */ |
1578 | .matches = { |
1579 | DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE" ), |
1580 | DMI_MATCH(DMI_PRODUCT_NAME, "U2442" ), |
1581 | }, |
1582 | }, |
1583 | #endif |
1584 | { } |
1585 | }; |
1586 | |
1587 | /* |
1588 | * Change Report id 0x5E to 0x5F. |
1589 | */ |
1590 | static int elantech_change_report_id(struct psmouse *psmouse) |
1591 | { |
1592 | /* |
1593 | * NOTE: the code is expecting to receive param[] as an array of 3 |
1594 | * items (see __ps2_command()), even if in this case only 2 are |
1595 | * actually needed. Make sure the array size is 3 to avoid potential |
1596 | * stack out-of-bound accesses. |
1597 | */ |
1598 | unsigned char param[3] = { 0x10, 0x03 }; |
1599 | |
1600 | if (elantech_write_reg_params(psmouse, reg: 0x7, param) || |
1601 | elantech_read_reg_params(psmouse, reg: 0x7, param) || |
1602 | param[0] != 0x10 || param[1] != 0x03) { |
1603 | psmouse_err(psmouse, "Unable to change report ID to 0x5f.\n" ); |
1604 | return -EIO; |
1605 | } |
1606 | |
1607 | return 0; |
1608 | } |
1609 | /* |
1610 | * determine hardware version and set some properties according to it. |
1611 | */ |
1612 | static int elantech_set_properties(struct elantech_device_info *info) |
1613 | { |
1614 | /* This represents the version of IC body. */ |
1615 | info->ic_version = (info->fw_version & 0x0f0000) >> 16; |
1616 | |
1617 | /* Early version of Elan touchpads doesn't obey the rule. */ |
1618 | if (info->fw_version < 0x020030 || info->fw_version == 0x020600) |
1619 | info->hw_version = 1; |
1620 | else { |
1621 | switch (info->ic_version) { |
1622 | case 2: |
1623 | case 4: |
1624 | info->hw_version = 2; |
1625 | break; |
1626 | case 5: |
1627 | info->hw_version = 3; |
1628 | break; |
1629 | case 6 ... 15: |
1630 | info->hw_version = 4; |
1631 | break; |
1632 | default: |
1633 | return -1; |
1634 | } |
1635 | } |
1636 | |
1637 | /* Get information pattern for hw_version 4 */ |
1638 | info->pattern = 0x00; |
1639 | if (info->ic_version == 0x0f && (info->fw_version & 0xff) <= 0x02) |
1640 | info->pattern = info->fw_version & 0xff; |
1641 | |
1642 | /* decide which send_cmd we're gonna use early */ |
1643 | info->send_cmd = info->hw_version >= 3 ? elantech_send_cmd : |
1644 | synaptics_send_cmd; |
1645 | |
1646 | /* Turn on packet checking by default */ |
1647 | info->paritycheck = 1; |
1648 | |
1649 | /* |
1650 | * This firmware suffers from misreporting coordinates when |
1651 | * a touch action starts causing the mouse cursor or scrolled page |
1652 | * to jump. Enable a workaround. |
1653 | */ |
1654 | info->jumpy_cursor = |
1655 | (info->fw_version == 0x020022 || info->fw_version == 0x020600); |
1656 | |
1657 | if (info->hw_version > 1) { |
1658 | /* For now show extra debug information */ |
1659 | info->debug = 1; |
1660 | |
1661 | if (info->fw_version >= 0x020800) |
1662 | info->reports_pressure = true; |
1663 | } |
1664 | |
1665 | /* |
1666 | * The signatures of v3 and v4 packets change depending on the |
1667 | * value of this hardware flag. |
1668 | */ |
1669 | info->crc_enabled = (info->fw_version & 0x4000) == 0x4000 || |
1670 | dmi_check_system(list: elantech_dmi_force_crc_enabled); |
1671 | |
1672 | /* Enable real hardware resolution on hw_version 3 ? */ |
1673 | info->set_hw_resolution = !dmi_check_system(list: no_hw_res_dmi_table); |
1674 | |
1675 | return 0; |
1676 | } |
1677 | |
1678 | static int elantech_query_info(struct psmouse *psmouse, |
1679 | struct elantech_device_info *info) |
1680 | { |
1681 | unsigned char param[3]; |
1682 | unsigned char traces; |
1683 | unsigned char ic_body[3]; |
1684 | |
1685 | memset(info, 0, sizeof(*info)); |
1686 | |
1687 | /* |
1688 | * Do the version query again so we can store the result |
1689 | */ |
1690 | if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { |
1691 | psmouse_err(psmouse, "failed to query firmware version.\n" ); |
1692 | return -EINVAL; |
1693 | } |
1694 | info->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; |
1695 | |
1696 | if (elantech_set_properties(info)) { |
1697 | psmouse_err(psmouse, "unknown hardware version, aborting...\n" ); |
1698 | return -EINVAL; |
1699 | } |
1700 | psmouse_info(psmouse, |
1701 | "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n" , |
1702 | info->hw_version, param[0], param[1], param[2]); |
1703 | |
1704 | if (info->send_cmd(psmouse, ETP_CAPABILITIES_QUERY, |
1705 | info->capabilities)) { |
1706 | psmouse_err(psmouse, "failed to query capabilities.\n" ); |
1707 | return -EINVAL; |
1708 | } |
1709 | psmouse_info(psmouse, |
1710 | "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n" , |
1711 | info->capabilities[0], info->capabilities[1], |
1712 | info->capabilities[2]); |
1713 | |
1714 | if (info->hw_version != 1) { |
1715 | if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, info->samples)) { |
1716 | psmouse_err(psmouse, "failed to query sample data\n" ); |
1717 | return -EINVAL; |
1718 | } |
1719 | psmouse_info(psmouse, |
1720 | "Elan sample query result %02x, %02x, %02x\n" , |
1721 | info->samples[0], |
1722 | info->samples[1], |
1723 | info->samples[2]); |
1724 | } |
1725 | |
1726 | if (info->pattern > 0x00 && info->ic_version == 0xf) { |
1727 | if (info->send_cmd(psmouse, ETP_ICBODY_QUERY, ic_body)) { |
1728 | psmouse_err(psmouse, "failed to query ic body\n" ); |
1729 | return -EINVAL; |
1730 | } |
1731 | info->ic_version = be16_to_cpup(p: (__be16 *)ic_body); |
1732 | psmouse_info(psmouse, |
1733 | "Elan ic body: %#04x, current fw version: %#02x\n" , |
1734 | info->ic_version, ic_body[2]); |
1735 | } |
1736 | |
1737 | info->product_id = be16_to_cpup(p: (__be16 *)info->samples); |
1738 | if (info->pattern == 0x00) |
1739 | info->product_id &= 0xff; |
1740 | |
1741 | if (info->samples[1] == 0x74 && info->hw_version == 0x03) { |
1742 | /* |
1743 | * This module has a bug which makes absolute mode |
1744 | * unusable, so let's abort so we'll be using standard |
1745 | * PS/2 protocol. |
1746 | */ |
1747 | psmouse_info(psmouse, |
1748 | "absolute mode broken, forcing standard PS/2 protocol\n" ); |
1749 | return -ENODEV; |
1750 | } |
1751 | |
1752 | /* The MSB indicates the presence of the trackpoint */ |
1753 | info->has_trackpoint = (info->capabilities[0] & 0x80) == 0x80; |
1754 | |
1755 | if (info->has_trackpoint && info->ic_version == 0x0011 && |
1756 | (info->product_id == 0x08 || info->product_id == 0x09 || |
1757 | info->product_id == 0x0d || info->product_id == 0x0e)) { |
1758 | /* |
1759 | * This module has a bug which makes trackpoint in SMBus |
1760 | * mode return invalid data unless trackpoint is switched |
1761 | * from using 0x5e reports to 0x5f. If we are not able to |
1762 | * make the switch, let's abort initialization so we'll be |
1763 | * using standard PS/2 protocol. |
1764 | */ |
1765 | if (elantech_change_report_id(psmouse)) { |
1766 | psmouse_info(psmouse, |
1767 | "Trackpoint report is broken, forcing standard PS/2 protocol\n" ); |
1768 | return -ENODEV; |
1769 | } |
1770 | } |
1771 | |
1772 | info->x_res = 31; |
1773 | info->y_res = 31; |
1774 | if (info->hw_version == 4) { |
1775 | if (elantech_get_resolution_v4(psmouse, |
1776 | x_res: &info->x_res, |
1777 | y_res: &info->y_res, |
1778 | bus: &info->bus)) { |
1779 | psmouse_warn(psmouse, |
1780 | "failed to query resolution data.\n" ); |
1781 | } |
1782 | } |
1783 | |
1784 | /* query range information */ |
1785 | switch (info->hw_version) { |
1786 | case 1: |
1787 | info->x_min = ETP_XMIN_V1; |
1788 | info->y_min = ETP_YMIN_V1; |
1789 | info->x_max = ETP_XMAX_V1; |
1790 | info->y_max = ETP_YMAX_V1; |
1791 | break; |
1792 | |
1793 | case 2: |
1794 | if (info->fw_version == 0x020800 || |
1795 | info->fw_version == 0x020b00 || |
1796 | info->fw_version == 0x020030) { |
1797 | info->x_min = ETP_XMIN_V2; |
1798 | info->y_min = ETP_YMIN_V2; |
1799 | info->x_max = ETP_XMAX_V2; |
1800 | info->y_max = ETP_YMAX_V2; |
1801 | } else { |
1802 | int i; |
1803 | int fixed_dpi; |
1804 | |
1805 | i = (info->fw_version > 0x020800 && |
1806 | info->fw_version < 0x020900) ? 1 : 2; |
1807 | |
1808 | if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) |
1809 | return -EINVAL; |
1810 | |
1811 | fixed_dpi = param[1] & 0x10; |
1812 | |
1813 | if (((info->fw_version >> 16) == 0x14) && fixed_dpi) { |
1814 | if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, param)) |
1815 | return -EINVAL; |
1816 | |
1817 | info->x_max = (info->capabilities[1] - i) * param[1] / 2; |
1818 | info->y_max = (info->capabilities[2] - i) * param[2] / 2; |
1819 | } else if (info->fw_version == 0x040216) { |
1820 | info->x_max = 819; |
1821 | info->y_max = 405; |
1822 | } else if (info->fw_version == 0x040219 || info->fw_version == 0x040215) { |
1823 | info->x_max = 900; |
1824 | info->y_max = 500; |
1825 | } else { |
1826 | info->x_max = (info->capabilities[1] - i) * 64; |
1827 | info->y_max = (info->capabilities[2] - i) * 64; |
1828 | } |
1829 | } |
1830 | break; |
1831 | |
1832 | case 3: |
1833 | if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) |
1834 | return -EINVAL; |
1835 | |
1836 | info->x_max = (0x0f & param[0]) << 8 | param[1]; |
1837 | info->y_max = (0xf0 & param[0]) << 4 | param[2]; |
1838 | break; |
1839 | |
1840 | case 4: |
1841 | if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) |
1842 | return -EINVAL; |
1843 | |
1844 | info->x_max = (0x0f & param[0]) << 8 | param[1]; |
1845 | info->y_max = (0xf0 & param[0]) << 4 | param[2]; |
1846 | traces = info->capabilities[1]; |
1847 | if ((traces < 2) || (traces > info->x_max)) |
1848 | return -EINVAL; |
1849 | |
1850 | info->width = info->x_max / (traces - 1); |
1851 | |
1852 | /* column number of traces */ |
1853 | info->x_traces = traces; |
1854 | |
1855 | /* row number of traces */ |
1856 | traces = info->capabilities[2]; |
1857 | if ((traces >= 2) && (traces <= info->y_max)) |
1858 | info->y_traces = traces; |
1859 | |
1860 | break; |
1861 | } |
1862 | |
1863 | /* check for the middle button: DMI matching or new v4 firmwares */ |
1864 | info->has_middle_button = dmi_check_system(list: elantech_dmi_has_middle_button) || |
1865 | (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) && |
1866 | !elantech_is_buttonpad(info)); |
1867 | |
1868 | return 0; |
1869 | } |
1870 | |
1871 | #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) |
1872 | |
1873 | /* |
1874 | * The newest Elantech device can use a secondary bus (over SMBus) which |
1875 | * provides a better bandwidth and allow a better control of the touchpads. |
1876 | * This is used to decide if we need to use this bus or not. |
1877 | */ |
1878 | enum { |
1879 | ELANTECH_SMBUS_NOT_SET = -1, |
1880 | ELANTECH_SMBUS_OFF, |
1881 | ELANTECH_SMBUS_ON, |
1882 | }; |
1883 | |
1884 | static int elantech_smbus = IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) ? |
1885 | ELANTECH_SMBUS_NOT_SET : ELANTECH_SMBUS_OFF; |
1886 | module_param_named(elantech_smbus, elantech_smbus, int, 0644); |
1887 | MODULE_PARM_DESC(elantech_smbus, "Use a secondary bus for the Elantech device." ); |
1888 | |
1889 | static const char * const i2c_blacklist_pnp_ids[] = { |
1890 | /* |
1891 | * These are known to not be working properly as bits are missing |
1892 | * in elan_i2c. |
1893 | */ |
1894 | NULL |
1895 | }; |
1896 | |
1897 | static int elantech_create_smbus(struct psmouse *psmouse, |
1898 | struct elantech_device_info *info, |
1899 | bool leave_breadcrumbs) |
1900 | { |
1901 | struct property_entry i2c_props[11] = {}; |
1902 | struct i2c_board_info smbus_board = { |
1903 | I2C_BOARD_INFO("elan_i2c" , 0x15), |
1904 | .flags = I2C_CLIENT_HOST_NOTIFY, |
1905 | }; |
1906 | unsigned int idx = 0; |
1907 | |
1908 | i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-x" , |
1909 | info->x_max + 1); |
1910 | i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-y" , |
1911 | info->y_max + 1); |
1912 | i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-x" , |
1913 | info->x_min); |
1914 | i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-y" , |
1915 | info->y_min); |
1916 | if (info->x_res) |
1917 | i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-x-mm" , |
1918 | (info->x_max + 1) / info->x_res); |
1919 | if (info->y_res) |
1920 | i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-y-mm" , |
1921 | (info->y_max + 1) / info->y_res); |
1922 | |
1923 | if (info->has_trackpoint) |
1924 | i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,trackpoint" ); |
1925 | |
1926 | if (info->has_middle_button) |
1927 | i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,middle-button" ); |
1928 | |
1929 | if (info->x_traces) |
1930 | i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,x_traces" , |
1931 | info->x_traces); |
1932 | if (info->y_traces) |
1933 | i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,y_traces" , |
1934 | info->y_traces); |
1935 | |
1936 | if (elantech_is_buttonpad(info)) |
1937 | i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,clickpad" ); |
1938 | |
1939 | smbus_board.fwnode = fwnode_create_software_node(properties: i2c_props, NULL); |
1940 | if (IS_ERR(ptr: smbus_board.fwnode)) |
1941 | return PTR_ERR(ptr: smbus_board.fwnode); |
1942 | |
1943 | return psmouse_smbus_init(psmouse, board: &smbus_board, NULL, pdata_size: 0, need_deactivate: false, |
1944 | leave_breadcrumbs); |
1945 | } |
1946 | |
1947 | /* |
1948 | * elantech_setup_smbus - called once the PS/2 devices are enumerated |
1949 | * and decides to instantiate a SMBus InterTouch device. |
1950 | */ |
1951 | static int elantech_setup_smbus(struct psmouse *psmouse, |
1952 | struct elantech_device_info *info, |
1953 | bool leave_breadcrumbs) |
1954 | { |
1955 | int error; |
1956 | |
1957 | if (elantech_smbus == ELANTECH_SMBUS_OFF) |
1958 | return -ENXIO; |
1959 | |
1960 | if (elantech_smbus == ELANTECH_SMBUS_NOT_SET) { |
1961 | /* |
1962 | * New ICs are enabled by default, unless mentioned in |
1963 | * i2c_blacklist_pnp_ids. |
1964 | * Old ICs are up to the user to decide. |
1965 | */ |
1966 | if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) || |
1967 | psmouse_matches_pnp_id(psmouse, ids: i2c_blacklist_pnp_ids)) |
1968 | return -ENXIO; |
1969 | } |
1970 | |
1971 | psmouse_info(psmouse, "Trying to set up SMBus access\n" ); |
1972 | |
1973 | error = elantech_create_smbus(psmouse, info, leave_breadcrumbs); |
1974 | if (error) { |
1975 | if (error == -EAGAIN) |
1976 | psmouse_info(psmouse, "SMbus companion is not ready yet\n" ); |
1977 | else |
1978 | psmouse_err(psmouse, "unable to create intertouch device\n" ); |
1979 | |
1980 | return error; |
1981 | } |
1982 | |
1983 | return 0; |
1984 | } |
1985 | |
1986 | static bool elantech_use_host_notify(struct psmouse *psmouse, |
1987 | struct elantech_device_info *info) |
1988 | { |
1989 | if (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version)) |
1990 | return true; |
1991 | |
1992 | switch (info->bus) { |
1993 | case ETP_BUS_PS2_ONLY: |
1994 | /* expected case */ |
1995 | break; |
1996 | case ETP_BUS_SMB_ALERT_ONLY: |
1997 | case ETP_BUS_PS2_SMB_ALERT: |
1998 | psmouse_dbg(psmouse, "Ignoring SMBus provider through alert protocol.\n" ); |
1999 | break; |
2000 | case ETP_BUS_SMB_HST_NTFY_ONLY: |
2001 | case ETP_BUS_PS2_SMB_HST_NTFY: |
2002 | return true; |
2003 | default: |
2004 | psmouse_dbg(psmouse, |
2005 | "Ignoring SMBus bus provider %d.\n" , |
2006 | info->bus); |
2007 | } |
2008 | |
2009 | return false; |
2010 | } |
2011 | |
2012 | int elantech_init_smbus(struct psmouse *psmouse) |
2013 | { |
2014 | struct elantech_device_info info; |
2015 | int error; |
2016 | |
2017 | psmouse_reset(psmouse); |
2018 | |
2019 | error = elantech_query_info(psmouse, info: &info); |
2020 | if (error) |
2021 | goto init_fail; |
2022 | |
2023 | if (info.hw_version < 4) { |
2024 | error = -ENXIO; |
2025 | goto init_fail; |
2026 | } |
2027 | |
2028 | return elantech_create_smbus(psmouse, info: &info, leave_breadcrumbs: false); |
2029 | init_fail: |
2030 | psmouse_reset(psmouse); |
2031 | return error; |
2032 | } |
2033 | #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ |
2034 | |
2035 | /* |
2036 | * Initialize the touchpad and create sysfs entries |
2037 | */ |
2038 | static int elantech_setup_ps2(struct psmouse *psmouse, |
2039 | struct elantech_device_info *info) |
2040 | { |
2041 | struct elantech_data *etd; |
2042 | int i; |
2043 | int error = -EINVAL; |
2044 | struct input_dev *tp_dev; |
2045 | |
2046 | psmouse->private = etd = kzalloc(size: sizeof(*etd), GFP_KERNEL); |
2047 | if (!etd) |
2048 | return -ENOMEM; |
2049 | |
2050 | etd->info = *info; |
2051 | |
2052 | etd->parity[0] = 1; |
2053 | for (i = 1; i < 256; i++) |
2054 | etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; |
2055 | |
2056 | if (elantech_set_absolute_mode(psmouse)) { |
2057 | psmouse_err(psmouse, |
2058 | "failed to put touchpad into absolute mode.\n" ); |
2059 | goto init_fail; |
2060 | } |
2061 | |
2062 | if (info->fw_version == 0x381f17) { |
2063 | etd->original_set_rate = psmouse->set_rate; |
2064 | psmouse->set_rate = elantech_set_rate_restore_reg_07; |
2065 | } |
2066 | |
2067 | if (elantech_set_input_params(psmouse)) { |
2068 | psmouse_err(psmouse, "failed to query touchpad range.\n" ); |
2069 | goto init_fail; |
2070 | } |
2071 | |
2072 | error = sysfs_create_group(kobj: &psmouse->ps2dev.serio->dev.kobj, |
2073 | grp: &elantech_attr_group); |
2074 | if (error) { |
2075 | psmouse_err(psmouse, |
2076 | "failed to create sysfs attributes, error: %d.\n" , |
2077 | error); |
2078 | goto init_fail; |
2079 | } |
2080 | |
2081 | if (info->has_trackpoint) { |
2082 | tp_dev = input_allocate_device(); |
2083 | |
2084 | if (!tp_dev) { |
2085 | error = -ENOMEM; |
2086 | goto init_fail_tp_alloc; |
2087 | } |
2088 | |
2089 | etd->tp_dev = tp_dev; |
2090 | snprintf(buf: etd->tp_phys, size: sizeof(etd->tp_phys), fmt: "%s/input1" , |
2091 | psmouse->ps2dev.serio->phys); |
2092 | tp_dev->phys = etd->tp_phys; |
2093 | tp_dev->name = "ETPS/2 Elantech TrackPoint" ; |
2094 | tp_dev->id.bustype = BUS_I8042; |
2095 | tp_dev->id.vendor = 0x0002; |
2096 | tp_dev->id.product = PSMOUSE_ELANTECH; |
2097 | tp_dev->id.version = 0x0000; |
2098 | tp_dev->dev.parent = &psmouse->ps2dev.serio->dev; |
2099 | tp_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); |
2100 | tp_dev->relbit[BIT_WORD(REL_X)] = |
2101 | BIT_MASK(REL_X) | BIT_MASK(REL_Y); |
2102 | tp_dev->keybit[BIT_WORD(BTN_LEFT)] = |
2103 | BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | |
2104 | BIT_MASK(BTN_RIGHT); |
2105 | |
2106 | __set_bit(INPUT_PROP_POINTER, tp_dev->propbit); |
2107 | __set_bit(INPUT_PROP_POINTING_STICK, tp_dev->propbit); |
2108 | |
2109 | error = input_register_device(etd->tp_dev); |
2110 | if (error < 0) |
2111 | goto init_fail_tp_reg; |
2112 | } |
2113 | |
2114 | psmouse->protocol_handler = elantech_process_byte; |
2115 | psmouse->disconnect = elantech_disconnect; |
2116 | psmouse->reconnect = elantech_reconnect; |
2117 | psmouse->fast_reconnect = NULL; |
2118 | psmouse->pktsize = info->hw_version > 1 ? 6 : 4; |
2119 | |
2120 | return 0; |
2121 | init_fail_tp_reg: |
2122 | input_free_device(dev: tp_dev); |
2123 | init_fail_tp_alloc: |
2124 | sysfs_remove_group(kobj: &psmouse->ps2dev.serio->dev.kobj, |
2125 | grp: &elantech_attr_group); |
2126 | init_fail: |
2127 | kfree(objp: etd); |
2128 | return error; |
2129 | } |
2130 | |
2131 | int elantech_init_ps2(struct psmouse *psmouse) |
2132 | { |
2133 | struct elantech_device_info info; |
2134 | int error; |
2135 | |
2136 | psmouse_reset(psmouse); |
2137 | |
2138 | error = elantech_query_info(psmouse, info: &info); |
2139 | if (error) |
2140 | goto init_fail; |
2141 | |
2142 | error = elantech_setup_ps2(psmouse, info: &info); |
2143 | if (error) |
2144 | goto init_fail; |
2145 | |
2146 | return 0; |
2147 | init_fail: |
2148 | psmouse_reset(psmouse); |
2149 | return error; |
2150 | } |
2151 | |
2152 | int elantech_init(struct psmouse *psmouse) |
2153 | { |
2154 | struct elantech_device_info info; |
2155 | int error; |
2156 | |
2157 | psmouse_reset(psmouse); |
2158 | |
2159 | error = elantech_query_info(psmouse, info: &info); |
2160 | if (error) |
2161 | goto init_fail; |
2162 | |
2163 | #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) |
2164 | |
2165 | if (elantech_use_host_notify(psmouse, info: &info)) { |
2166 | if (!IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) || |
2167 | !IS_ENABLED(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)) { |
2168 | psmouse_warn(psmouse, |
2169 | "The touchpad can support a better bus than the too old PS/2 protocol. " |
2170 | "Make sure MOUSE_PS2_ELANTECH_SMBUS and MOUSE_ELAN_I2C_SMBUS are enabled to get a better touchpad experience.\n" ); |
2171 | } |
2172 | error = elantech_setup_smbus(psmouse, info: &info, leave_breadcrumbs: true); |
2173 | if (!error) |
2174 | return PSMOUSE_ELANTECH_SMBUS; |
2175 | } |
2176 | |
2177 | #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ |
2178 | |
2179 | error = elantech_setup_ps2(psmouse, info: &info); |
2180 | if (error < 0) { |
2181 | /* |
2182 | * Not using any flavor of Elantech support, so clean up |
2183 | * SMbus breadcrumbs, if any. |
2184 | */ |
2185 | psmouse_smbus_cleanup(psmouse); |
2186 | goto init_fail; |
2187 | } |
2188 | |
2189 | return PSMOUSE_ELANTECH; |
2190 | init_fail: |
2191 | psmouse_reset(psmouse); |
2192 | return error; |
2193 | } |
2194 | |