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df08ef27 AS |
1 | /* |
2 | * OLPC HGPK (XO-1) touchpad PS/2 mouse driver | |
3 | * | |
4 | * Copyright (c) 2006-2008 One Laptop Per Child | |
5 | * Authors: | |
6 | * Zephaniah E. Hull | |
7 | * Andres Salomon <dilinger@debian.org> | |
8 | * | |
9 | * This driver is partly based on the ALPS driver, which is: | |
10 | * | |
11 | * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au> | |
12 | * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com> | |
13 | * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru> | |
14 | * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz> | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License version 2 as | |
18 | * published by the Free Software Foundation. | |
19 | */ | |
20 | ||
21 | /* | |
22 | * The spec from ALPS is available from | |
23 | * <http://wiki.laptop.org/go/Touch_Pad/Tablet>. It refers to this | |
24 | * device as HGPK (Hybrid GS, PT, and Keymatrix). | |
25 | * | |
26 | * The earliest versions of the device had simultaneous reporting; that | |
27 | * was removed. After that, the device used the Advanced Mode GS/PT streaming | |
28 | * stuff. That turned out to be too buggy to support, so we've finally | |
29 | * switched to Mouse Mode (which utilizes only the center 1/3 of the touchpad). | |
30 | */ | |
31 | ||
32 | #define DEBUG | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
df08ef27 | 34 | #include <linux/input.h> |
ab3d0abe | 35 | #include <linux/module.h> |
df08ef27 AS |
36 | #include <linux/serio.h> |
37 | #include <linux/libps2.h> | |
38 | #include <linux/delay.h> | |
39 | #include <asm/olpc.h> | |
40 | ||
41 | #include "psmouse.h" | |
42 | #include "hgpk.h" | |
43 | ||
a309cdc7 DD |
44 | #define ILLEGAL_XY 999999 |
45 | ||
a62f0d27 DT |
46 | static bool tpdebug; |
47 | module_param(tpdebug, bool, 0644); | |
df08ef27 AS |
48 | MODULE_PARM_DESC(tpdebug, "enable debugging, dumping packets to KERN_DEBUG."); |
49 | ||
50 | static int recalib_delta = 100; | |
51 | module_param(recalib_delta, int, 0644); | |
52 | MODULE_PARM_DESC(recalib_delta, | |
a309cdc7 DD |
53 | "packets containing a delta this large will be discarded, and a " |
54 | "recalibration may be scheduled."); | |
df08ef27 | 55 | |
a309cdc7 | 56 | static int jumpy_delay = 20; |
8bbf2703 PF |
57 | module_param(jumpy_delay, int, 0644); |
58 | MODULE_PARM_DESC(jumpy_delay, | |
59 | "delay (ms) before recal after jumpiness detected"); | |
60 | ||
c0dc8342 | 61 | static int spew_delay = 1; |
8bbf2703 PF |
62 | module_param(spew_delay, int, 0644); |
63 | MODULE_PARM_DESC(spew_delay, | |
64 | "delay (ms) before recal after packet spew detected"); | |
65 | ||
34caed20 | 66 | static int recal_guard_time; |
8bbf2703 PF |
67 | module_param(recal_guard_time, int, 0644); |
68 | MODULE_PARM_DESC(recal_guard_time, | |
69 | "interval (ms) during which recal will be restarted if packet received"); | |
70 | ||
34caed20 | 71 | static int post_interrupt_delay = 40; |
8bbf2703 PF |
72 | module_param(post_interrupt_delay, int, 0644); |
73 | MODULE_PARM_DESC(post_interrupt_delay, | |
74 | "delay (ms) before recal after recal interrupt detected"); | |
75 | ||
34caed20 DD |
76 | static bool autorecal = true; |
77 | module_param(autorecal, bool, 0644); | |
78 | MODULE_PARM_DESC(autorecal, "enable recalibration in the driver"); | |
79 | ||
ca94ec43 DD |
80 | static char hgpk_mode_name[16]; |
81 | module_param_string(hgpk_mode, hgpk_mode_name, sizeof(hgpk_mode_name), 0644); | |
82 | MODULE_PARM_DESC(hgpk_mode, | |
83 | "default hgpk mode: mouse, glidesensor or pentablet"); | |
84 | ||
85 | static int hgpk_default_mode = HGPK_MODE_MOUSE; | |
86 | ||
87 | static const char * const hgpk_mode_names[] = { | |
88 | [HGPK_MODE_MOUSE] = "Mouse", | |
89 | [HGPK_MODE_GLIDESENSOR] = "GlideSensor", | |
90 | [HGPK_MODE_PENTABLET] = "PenTablet", | |
91 | }; | |
92 | ||
93 | static int hgpk_mode_from_name(const char *buf, int len) | |
94 | { | |
95 | int i; | |
96 | ||
97 | for (i = 0; i < ARRAY_SIZE(hgpk_mode_names); i++) { | |
98 | const char *name = hgpk_mode_names[i]; | |
99 | if (strlen(name) == len && !strncasecmp(name, buf, len)) | |
100 | return i; | |
101 | } | |
102 | ||
103 | return HGPK_MODE_INVALID; | |
104 | } | |
105 | ||
df08ef27 | 106 | /* |
a309cdc7 | 107 | * see if new value is within 20% of half of old value |
df08ef27 | 108 | */ |
a309cdc7 DD |
109 | static int approx_half(int curr, int prev) |
110 | { | |
111 | int belowhalf, abovehalf; | |
112 | ||
113 | if (curr < 5 || prev < 5) | |
114 | return 0; | |
115 | ||
116 | belowhalf = (prev * 8) / 20; | |
117 | abovehalf = (prev * 12) / 20; | |
118 | ||
119 | return belowhalf < curr && curr <= abovehalf; | |
120 | } | |
121 | ||
122 | /* | |
123 | * Throw out oddly large delta packets, and any that immediately follow whose | |
124 | * values are each approximately half of the previous. It seems that the ALPS | |
125 | * firmware emits errant packets, and they get averaged out slowly. | |
126 | */ | |
127 | static int hgpk_discard_decay_hack(struct psmouse *psmouse, int x, int y) | |
df08ef27 AS |
128 | { |
129 | struct hgpk_data *priv = psmouse->private; | |
a309cdc7 DD |
130 | int avx, avy; |
131 | bool do_recal = false; | |
132 | ||
133 | avx = abs(x); | |
134 | avy = abs(y); | |
135 | ||
136 | /* discard if too big, or half that but > 4 times the prev delta */ | |
137 | if (avx > recalib_delta || | |
138 | (avx > recalib_delta / 2 && ((avx / 4) > priv->xlast))) { | |
b5d21704 | 139 | psmouse_warn(psmouse, "detected %dpx jump in x\n", x); |
a309cdc7 DD |
140 | priv->xbigj = avx; |
141 | } else if (approx_half(avx, priv->xbigj)) { | |
b5d21704 | 142 | psmouse_warn(psmouse, "detected secondary %dpx jump in x\n", x); |
a309cdc7 DD |
143 | priv->xbigj = avx; |
144 | priv->xsaw_secondary++; | |
145 | } else { | |
146 | if (priv->xbigj && priv->xsaw_secondary > 1) | |
147 | do_recal = true; | |
148 | priv->xbigj = 0; | |
149 | priv->xsaw_secondary = 0; | |
150 | } | |
df08ef27 | 151 | |
a309cdc7 DD |
152 | if (avy > recalib_delta || |
153 | (avy > recalib_delta / 2 && ((avy / 4) > priv->ylast))) { | |
b5d21704 | 154 | psmouse_warn(psmouse, "detected %dpx jump in y\n", y); |
a309cdc7 DD |
155 | priv->ybigj = avy; |
156 | } else if (approx_half(avy, priv->ybigj)) { | |
b5d21704 | 157 | psmouse_warn(psmouse, "detected secondary %dpx jump in y\n", y); |
a309cdc7 DD |
158 | priv->ybigj = avy; |
159 | priv->ysaw_secondary++; | |
160 | } else { | |
161 | if (priv->ybigj && priv->ysaw_secondary > 1) | |
162 | do_recal = true; | |
163 | priv->ybigj = 0; | |
164 | priv->ysaw_secondary = 0; | |
165 | } | |
166 | ||
167 | priv->xlast = avx; | |
168 | priv->ylast = avy; | |
169 | ||
170 | if (do_recal && jumpy_delay) { | |
b5d21704 | 171 | psmouse_warn(psmouse, "scheduling recalibration\n"); |
df08ef27 | 172 | psmouse_queue_work(psmouse, &priv->recalib_wq, |
8bbf2703 | 173 | msecs_to_jiffies(jumpy_delay)); |
df08ef27 | 174 | } |
a309cdc7 DD |
175 | |
176 | return priv->xbigj || priv->ybigj; | |
df08ef27 AS |
177 | } |
178 | ||
c0dc8342 DD |
179 | static void hgpk_reset_spew_detection(struct hgpk_data *priv) |
180 | { | |
181 | priv->spew_count = 0; | |
182 | priv->dupe_count = 0; | |
183 | priv->x_tally = 0; | |
184 | priv->y_tally = 0; | |
185 | priv->spew_flag = NO_SPEW; | |
186 | } | |
187 | ||
188 | static void hgpk_reset_hack_state(struct psmouse *psmouse) | |
189 | { | |
190 | struct hgpk_data *priv = psmouse->private; | |
191 | ||
192 | priv->abs_x = priv->abs_y = -1; | |
a309cdc7 DD |
193 | priv->xlast = priv->ylast = ILLEGAL_XY; |
194 | priv->xbigj = priv->ybigj = 0; | |
195 | priv->xsaw_secondary = priv->ysaw_secondary = 0; | |
c0dc8342 DD |
196 | hgpk_reset_spew_detection(priv); |
197 | } | |
198 | ||
df08ef27 AS |
199 | /* |
200 | * We have no idea why this particular hardware bug occurs. The touchpad | |
201 | * will randomly start spewing packets without anything touching the | |
202 | * pad. This wouldn't necessarily be bad, but it's indicative of a | |
203 | * severely miscalibrated pad; attempting to use the touchpad while it's | |
204 | * spewing means the cursor will jump all over the place, and act "drunk". | |
205 | * | |
206 | * The packets that are spewed tend to all have deltas between -2 and 2, and | |
207 | * the cursor will move around without really going very far. It will | |
208 | * tend to end up in the same location; if we tally up the changes over | |
209 | * 100 packets, we end up w/ a final delta of close to 0. This happens | |
210 | * pretty regularly when the touchpad is spewing, and is pretty hard to | |
211 | * manually trigger (at least for *my* fingers). So, it makes a perfect | |
212 | * scheme for detecting spews. | |
213 | */ | |
214 | static void hgpk_spewing_hack(struct psmouse *psmouse, | |
215 | int l, int r, int x, int y) | |
216 | { | |
217 | struct hgpk_data *priv = psmouse->private; | |
218 | ||
219 | /* ignore button press packets; many in a row could trigger | |
220 | * a false-positive! */ | |
221 | if (l || r) | |
222 | return; | |
223 | ||
c0dc8342 DD |
224 | /* don't track spew if the workaround feature has been turned off */ |
225 | if (!spew_delay) | |
226 | return; | |
227 | ||
228 | if (abs(x) > 3 || abs(y) > 3) { | |
229 | /* no spew, or spew ended */ | |
230 | hgpk_reset_spew_detection(priv); | |
231 | return; | |
232 | } | |
233 | ||
234 | /* Keep a tally of the overall delta to the cursor position caused by | |
235 | * the spew */ | |
df08ef27 AS |
236 | priv->x_tally += x; |
237 | priv->y_tally += y; | |
238 | ||
c0dc8342 DD |
239 | switch (priv->spew_flag) { |
240 | case NO_SPEW: | |
241 | /* we're not spewing, but this packet might be the start */ | |
242 | priv->spew_flag = MAYBE_SPEWING; | |
243 | ||
244 | /* fall-through */ | |
245 | ||
246 | case MAYBE_SPEWING: | |
247 | priv->spew_count++; | |
248 | ||
249 | if (priv->spew_count < SPEW_WATCH_COUNT) | |
250 | break; | |
251 | ||
252 | /* excessive spew detected, request recalibration */ | |
253 | priv->spew_flag = SPEW_DETECTED; | |
254 | ||
255 | /* fall-through */ | |
256 | ||
257 | case SPEW_DETECTED: | |
258 | /* only recalibrate when the overall delta to the cursor | |
259 | * is really small. if the spew is causing significant cursor | |
260 | * movement, it is probably a case of the user moving the | |
261 | * cursor very slowly across the screen. */ | |
df08ef27 | 262 | if (abs(priv->x_tally) < 3 && abs(priv->y_tally) < 3) { |
b5d21704 DT |
263 | psmouse_warn(psmouse, "packet spew detected (%d,%d)\n", |
264 | priv->x_tally, priv->y_tally); | |
c0dc8342 | 265 | priv->spew_flag = RECALIBRATING; |
df08ef27 | 266 | psmouse_queue_work(psmouse, &priv->recalib_wq, |
8bbf2703 | 267 | msecs_to_jiffies(spew_delay)); |
df08ef27 | 268 | } |
c0dc8342 DD |
269 | |
270 | break; | |
271 | case RECALIBRATING: | |
272 | /* we already detected a spew and requested a recalibration, | |
273 | * just wait for the queue to kick into action. */ | |
274 | break; | |
df08ef27 AS |
275 | } |
276 | } | |
277 | ||
278 | /* | |
279 | * HGPK Mouse Mode format (standard mouse format, sans middle button) | |
280 | * | |
281 | * byte 0: y-over x-over y-neg x-neg 1 0 swr swl | |
282 | * byte 1: x7 x6 x5 x4 x3 x2 x1 x0 | |
283 | * byte 2: y7 y6 y5 y4 y3 y2 y1 y0 | |
284 | * | |
285 | * swr/swl are the left/right buttons. | |
286 | * x-neg/y-neg are the x and y delta negative bits | |
287 | * x-over/y-over are the x and y overflow bits | |
ca94ec43 DD |
288 | * |
289 | * --- | |
290 | * | |
291 | * HGPK Advanced Mode - single-mode format | |
292 | * | |
293 | * byte 0(PT): 1 1 0 0 1 1 1 1 | |
294 | * byte 0(GS): 1 1 1 1 1 1 1 1 | |
295 | * byte 1: 0 x6 x5 x4 x3 x2 x1 x0 | |
296 | * byte 2(PT): 0 0 x9 x8 x7 ? pt-dsw 0 | |
297 | * byte 2(GS): 0 x10 x9 x8 x7 ? gs-dsw pt-dsw | |
298 | * byte 3: 0 y9 y8 y7 1 0 swr swl | |
299 | * byte 4: 0 y6 y5 y4 y3 y2 y1 y0 | |
300 | * byte 5: 0 z6 z5 z4 z3 z2 z1 z0 | |
301 | * | |
302 | * ?'s are not defined in the protocol spec, may vary between models. | |
303 | * | |
304 | * swr/swl are the left/right buttons. | |
305 | * | |
306 | * pt-dsw/gs-dsw indicate that the pt/gs sensor is detecting a | |
307 | * pen/finger | |
df08ef27 | 308 | */ |
ca94ec43 | 309 | static bool hgpk_is_byte_valid(struct psmouse *psmouse, unsigned char *packet) |
df08ef27 | 310 | { |
ca94ec43 DD |
311 | struct hgpk_data *priv = psmouse->private; |
312 | int pktcnt = psmouse->pktcnt; | |
313 | bool valid; | |
314 | ||
315 | switch (priv->mode) { | |
316 | case HGPK_MODE_MOUSE: | |
317 | valid = (packet[0] & 0x0C) == 0x08; | |
318 | break; | |
319 | ||
320 | case HGPK_MODE_GLIDESENSOR: | |
321 | valid = pktcnt == 1 ? | |
322 | packet[0] == HGPK_GS : !(packet[pktcnt - 1] & 0x80); | |
323 | break; | |
324 | ||
325 | case HGPK_MODE_PENTABLET: | |
326 | valid = pktcnt == 1 ? | |
327 | packet[0] == HGPK_PT : !(packet[pktcnt - 1] & 0x80); | |
328 | break; | |
329 | ||
330 | default: | |
331 | valid = false; | |
332 | break; | |
333 | } | |
334 | ||
335 | if (!valid) | |
b5d21704 DT |
336 | psmouse_dbg(psmouse, |
337 | "bad data, mode %d (%d) %02x %02x %02x %02x %02x %02x\n", | |
338 | priv->mode, pktcnt, | |
339 | psmouse->packet[0], psmouse->packet[1], | |
340 | psmouse->packet[2], psmouse->packet[3], | |
341 | psmouse->packet[4], psmouse->packet[5]); | |
ca94ec43 DD |
342 | |
343 | return valid; | |
df08ef27 AS |
344 | } |
345 | ||
ca94ec43 | 346 | static void hgpk_process_advanced_packet(struct psmouse *psmouse) |
df08ef27 | 347 | { |
ca94ec43 DD |
348 | struct hgpk_data *priv = psmouse->private; |
349 | struct input_dev *idev = psmouse->dev; | |
df08ef27 | 350 | unsigned char *packet = psmouse->packet; |
ca94ec43 DD |
351 | int down = !!(packet[2] & 2); |
352 | int left = !!(packet[3] & 1); | |
353 | int right = !!(packet[3] & 2); | |
354 | int x = packet[1] | ((packet[2] & 0x78) << 4); | |
355 | int y = packet[4] | ((packet[3] & 0x70) << 3); | |
356 | ||
357 | if (priv->mode == HGPK_MODE_GLIDESENSOR) { | |
358 | int pt_down = !!(packet[2] & 1); | |
359 | int finger_down = !!(packet[2] & 2); | |
360 | int z = packet[5]; | |
361 | ||
362 | input_report_abs(idev, ABS_PRESSURE, z); | |
363 | if (tpdebug) | |
b5d21704 DT |
364 | psmouse_dbg(psmouse, "pd=%d fd=%d z=%d", |
365 | pt_down, finger_down, z); | |
ca94ec43 DD |
366 | } else { |
367 | /* | |
368 | * PenTablet mode does not report pressure, so we don't | |
369 | * report it here | |
370 | */ | |
371 | if (tpdebug) | |
b5d21704 | 372 | psmouse_dbg(psmouse, "pd=%d ", down); |
ca94ec43 | 373 | } |
df08ef27 | 374 | |
ca94ec43 | 375 | if (tpdebug) |
b5d21704 DT |
376 | psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", |
377 | left, right, x, y); | |
df08ef27 | 378 | |
ca94ec43 DD |
379 | input_report_key(idev, BTN_TOUCH, down); |
380 | input_report_key(idev, BTN_LEFT, left); | |
381 | input_report_key(idev, BTN_RIGHT, right); | |
382 | ||
383 | /* | |
384 | * If this packet says that the finger was removed, reset our position | |
385 | * tracking so that we don't erroneously detect a jump on next press. | |
386 | */ | |
c0dc8342 | 387 | if (!down) { |
a309cdc7 | 388 | hgpk_reset_hack_state(psmouse); |
c0dc8342 DD |
389 | goto done; |
390 | } | |
ca94ec43 DD |
391 | |
392 | /* | |
c0dc8342 DD |
393 | * Weed out duplicate packets (we get quite a few, and they mess up |
394 | * our jump detection) | |
ca94ec43 | 395 | */ |
c0dc8342 DD |
396 | if (x == priv->abs_x && y == priv->abs_y) { |
397 | if (++priv->dupe_count > SPEW_WATCH_COUNT) { | |
398 | if (tpdebug) | |
b5d21704 | 399 | psmouse_dbg(psmouse, "hard spew detected\n"); |
c0dc8342 DD |
400 | priv->spew_flag = RECALIBRATING; |
401 | psmouse_queue_work(psmouse, &priv->recalib_wq, | |
402 | msecs_to_jiffies(spew_delay)); | |
ca94ec43 | 403 | } |
c0dc8342 DD |
404 | goto done; |
405 | } | |
ca94ec43 | 406 | |
c0dc8342 DD |
407 | /* not a duplicate, continue with position reporting */ |
408 | priv->dupe_count = 0; | |
409 | ||
410 | /* Don't apply hacks in PT mode, it seems reliable */ | |
411 | if (priv->mode != HGPK_MODE_PENTABLET && priv->abs_x != -1) { | |
a309cdc7 DD |
412 | int x_diff = priv->abs_x - x; |
413 | int y_diff = priv->abs_y - y; | |
414 | if (hgpk_discard_decay_hack(psmouse, x_diff, y_diff)) { | |
415 | if (tpdebug) | |
b5d21704 | 416 | psmouse_dbg(psmouse, "discarding\n"); |
a309cdc7 DD |
417 | goto done; |
418 | } | |
419 | hgpk_spewing_hack(psmouse, left, right, x_diff, y_diff); | |
ca94ec43 DD |
420 | } |
421 | ||
c0dc8342 DD |
422 | input_report_abs(idev, ABS_X, x); |
423 | input_report_abs(idev, ABS_Y, y); | |
424 | priv->abs_x = x; | |
425 | priv->abs_y = y; | |
426 | ||
427 | done: | |
ca94ec43 DD |
428 | input_sync(idev); |
429 | } | |
430 | ||
431 | static void hgpk_process_simple_packet(struct psmouse *psmouse) | |
432 | { | |
433 | struct input_dev *dev = psmouse->dev; | |
434 | unsigned char *packet = psmouse->packet; | |
435 | int left = packet[0] & 1; | |
436 | int right = (packet[0] >> 1) & 1; | |
437 | int x = packet[1] - ((packet[0] << 4) & 0x100); | |
438 | int y = ((packet[0] << 3) & 0x100) - packet[2]; | |
df08ef27 | 439 | |
67f56bb0 | 440 | if (packet[0] & 0xc0) |
b5d21704 DT |
441 | psmouse_dbg(psmouse, |
442 | "overflow -- 0x%02x 0x%02x 0x%02x\n", | |
443 | packet[0], packet[1], packet[2]); | |
67f56bb0 | 444 | |
a309cdc7 DD |
445 | if (hgpk_discard_decay_hack(psmouse, x, y)) { |
446 | if (tpdebug) | |
b5d21704 | 447 | psmouse_dbg(psmouse, "discarding\n"); |
a309cdc7 DD |
448 | return; |
449 | } | |
450 | ||
df08ef27 AS |
451 | hgpk_spewing_hack(psmouse, left, right, x, y); |
452 | ||
453 | if (tpdebug) | |
b5d21704 DT |
454 | psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", |
455 | left, right, x, y); | |
df08ef27 AS |
456 | |
457 | input_report_key(dev, BTN_LEFT, left); | |
458 | input_report_key(dev, BTN_RIGHT, right); | |
459 | ||
460 | input_report_rel(dev, REL_X, x); | |
461 | input_report_rel(dev, REL_Y, y); | |
462 | ||
463 | input_sync(dev); | |
464 | } | |
465 | ||
466 | static psmouse_ret_t hgpk_process_byte(struct psmouse *psmouse) | |
467 | { | |
468 | struct hgpk_data *priv = psmouse->private; | |
469 | ||
ca94ec43 | 470 | if (!hgpk_is_byte_valid(psmouse, psmouse->packet)) |
df08ef27 | 471 | return PSMOUSE_BAD_DATA; |
df08ef27 AS |
472 | |
473 | if (psmouse->pktcnt >= psmouse->pktsize) { | |
ca94ec43 DD |
474 | if (priv->mode == HGPK_MODE_MOUSE) |
475 | hgpk_process_simple_packet(psmouse); | |
476 | else | |
477 | hgpk_process_advanced_packet(psmouse); | |
df08ef27 AS |
478 | return PSMOUSE_FULL_PACKET; |
479 | } | |
480 | ||
481 | if (priv->recalib_window) { | |
482 | if (time_before(jiffies, priv->recalib_window)) { | |
483 | /* | |
484 | * ugh, got a packet inside our recalibration | |
485 | * window, schedule another recalibration. | |
486 | */ | |
b5d21704 DT |
487 | psmouse_dbg(psmouse, |
488 | "packet inside calibration window, queueing another recalibration\n"); | |
df08ef27 | 489 | psmouse_queue_work(psmouse, &priv->recalib_wq, |
8bbf2703 | 490 | msecs_to_jiffies(post_interrupt_delay)); |
df08ef27 AS |
491 | } |
492 | priv->recalib_window = 0; | |
493 | } | |
494 | ||
495 | return PSMOUSE_GOOD_DATA; | |
496 | } | |
497 | ||
ca94ec43 DD |
498 | static int hgpk_select_mode(struct psmouse *psmouse) |
499 | { | |
500 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
501 | struct hgpk_data *priv = psmouse->private; | |
502 | int i; | |
503 | int cmd; | |
504 | ||
505 | /* | |
506 | * 4 disables to enable advanced mode | |
507 | * then 3 0xf2 bytes as the preamble for GS/PT selection | |
508 | */ | |
509 | const int advanced_init[] = { | |
510 | PSMOUSE_CMD_DISABLE, PSMOUSE_CMD_DISABLE, | |
511 | PSMOUSE_CMD_DISABLE, PSMOUSE_CMD_DISABLE, | |
512 | 0xf2, 0xf2, 0xf2, | |
513 | }; | |
514 | ||
515 | switch (priv->mode) { | |
516 | case HGPK_MODE_MOUSE: | |
517 | psmouse->pktsize = 3; | |
518 | break; | |
519 | ||
520 | case HGPK_MODE_GLIDESENSOR: | |
521 | case HGPK_MODE_PENTABLET: | |
522 | psmouse->pktsize = 6; | |
523 | ||
524 | /* Switch to 'Advanced mode.', four disables in a row. */ | |
525 | for (i = 0; i < ARRAY_SIZE(advanced_init); i++) | |
526 | if (ps2_command(ps2dev, NULL, advanced_init[i])) | |
527 | return -EIO; | |
528 | ||
529 | /* select between GlideSensor (mouse) or PenTablet */ | |
530 | cmd = priv->mode == HGPK_MODE_GLIDESENSOR ? | |
531 | PSMOUSE_CMD_SETSCALE11 : PSMOUSE_CMD_SETSCALE21; | |
532 | ||
533 | if (ps2_command(ps2dev, NULL, cmd)) | |
534 | return -EIO; | |
535 | break; | |
536 | ||
537 | default: | |
538 | return -EINVAL; | |
539 | } | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
544 | static void hgpk_setup_input_device(struct input_dev *input, | |
545 | struct input_dev *old_input, | |
546 | enum hgpk_mode mode) | |
547 | { | |
548 | if (old_input) { | |
549 | input->name = old_input->name; | |
550 | input->phys = old_input->phys; | |
551 | input->id = old_input->id; | |
552 | input->dev.parent = old_input->dev.parent; | |
553 | } | |
554 | ||
555 | memset(input->evbit, 0, sizeof(input->evbit)); | |
556 | memset(input->relbit, 0, sizeof(input->relbit)); | |
557 | memset(input->keybit, 0, sizeof(input->keybit)); | |
558 | ||
559 | /* All modes report left and right buttons */ | |
560 | __set_bit(EV_KEY, input->evbit); | |
561 | __set_bit(BTN_LEFT, input->keybit); | |
562 | __set_bit(BTN_RIGHT, input->keybit); | |
563 | ||
564 | switch (mode) { | |
565 | case HGPK_MODE_MOUSE: | |
566 | __set_bit(EV_REL, input->evbit); | |
567 | __set_bit(REL_X, input->relbit); | |
568 | __set_bit(REL_Y, input->relbit); | |
569 | break; | |
570 | ||
571 | case HGPK_MODE_GLIDESENSOR: | |
572 | __set_bit(BTN_TOUCH, input->keybit); | |
573 | __set_bit(BTN_TOOL_FINGER, input->keybit); | |
574 | ||
575 | __set_bit(EV_ABS, input->evbit); | |
576 | ||
577 | /* GlideSensor has pressure sensor, PenTablet does not */ | |
578 | input_set_abs_params(input, ABS_PRESSURE, 0, 15, 0, 0); | |
579 | ||
580 | /* From device specs */ | |
581 | input_set_abs_params(input, ABS_X, 0, 399, 0, 0); | |
582 | input_set_abs_params(input, ABS_Y, 0, 290, 0, 0); | |
583 | ||
584 | /* Calculated by hand based on usable size (52mm x 38mm) */ | |
585 | input_abs_set_res(input, ABS_X, 8); | |
586 | input_abs_set_res(input, ABS_Y, 8); | |
587 | break; | |
588 | ||
589 | case HGPK_MODE_PENTABLET: | |
590 | __set_bit(BTN_TOUCH, input->keybit); | |
591 | __set_bit(BTN_TOOL_FINGER, input->keybit); | |
592 | ||
593 | __set_bit(EV_ABS, input->evbit); | |
594 | ||
595 | /* From device specs */ | |
596 | input_set_abs_params(input, ABS_X, 0, 999, 0, 0); | |
597 | input_set_abs_params(input, ABS_Y, 5, 239, 0, 0); | |
598 | ||
599 | /* Calculated by hand based on usable size (156mm x 38mm) */ | |
600 | input_abs_set_res(input, ABS_X, 6); | |
601 | input_abs_set_res(input, ABS_Y, 8); | |
602 | break; | |
603 | ||
604 | default: | |
605 | BUG(); | |
606 | } | |
607 | } | |
608 | ||
ca94ec43 DD |
609 | static int hgpk_reset_device(struct psmouse *psmouse, bool recalibrate) |
610 | { | |
611 | int err; | |
612 | ||
613 | psmouse_reset(psmouse); | |
614 | ||
615 | if (recalibrate) { | |
616 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
617 | ||
618 | /* send the recalibrate request */ | |
619 | if (ps2_command(ps2dev, NULL, 0xf5) || | |
620 | ps2_command(ps2dev, NULL, 0xf5) || | |
621 | ps2_command(ps2dev, NULL, 0xe6) || | |
622 | ps2_command(ps2dev, NULL, 0xf5)) { | |
623 | return -1; | |
624 | } | |
625 | ||
626 | /* according to ALPS, 150mS is required for recalibration */ | |
627 | msleep(150); | |
628 | } | |
629 | ||
630 | err = hgpk_select_mode(psmouse); | |
631 | if (err) { | |
b5d21704 | 632 | psmouse_err(psmouse, "failed to select mode\n"); |
ca94ec43 DD |
633 | return err; |
634 | } | |
635 | ||
636 | hgpk_reset_hack_state(psmouse); | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
df08ef27 AS |
641 | static int hgpk_force_recalibrate(struct psmouse *psmouse) |
642 | { | |
643 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
644 | struct hgpk_data *priv = psmouse->private; | |
ca94ec43 | 645 | int err; |
df08ef27 AS |
646 | |
647 | /* C-series touchpads added the recalibrate command */ | |
648 | if (psmouse->model < HGPK_MODEL_C) | |
649 | return 0; | |
650 | ||
34caed20 | 651 | if (!autorecal) { |
b5d21704 | 652 | psmouse_dbg(psmouse, "recalibration disabled, ignoring\n"); |
34caed20 DD |
653 | return 0; |
654 | } | |
655 | ||
b5d21704 | 656 | psmouse_dbg(psmouse, "recalibrating touchpad..\n"); |
34caed20 | 657 | |
df08ef27 AS |
658 | /* we don't want to race with the irq handler, nor with resyncs */ |
659 | psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); | |
660 | ||
661 | /* start by resetting the device */ | |
ca94ec43 DD |
662 | err = hgpk_reset_device(psmouse, true); |
663 | if (err) | |
664 | return err; | |
df08ef27 | 665 | |
ca94ec43 DD |
666 | /* |
667 | * XXX: If a finger is down during this delay, recalibration will | |
df08ef27 AS |
668 | * detect capacitance incorrectly. This is a hardware bug, and |
669 | * we don't have a good way to deal with it. The 2s window stuff | |
670 | * (below) is our best option for now. | |
671 | */ | |
672 | ||
673 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) | |
674 | return -1; | |
675 | ||
676 | psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); | |
677 | ||
34caed20 | 678 | if (tpdebug) |
b5d21704 | 679 | psmouse_dbg(psmouse, "touchpad reactivated\n"); |
34caed20 | 680 | |
ca94ec43 | 681 | /* |
34caed20 DD |
682 | * If we get packets right away after recalibrating, it's likely |
683 | * that a finger was on the touchpad. If so, it's probably | |
684 | * miscalibrated, so we optionally schedule another. | |
df08ef27 | 685 | */ |
34caed20 DD |
686 | if (recal_guard_time) |
687 | priv->recalib_window = jiffies + | |
688 | msecs_to_jiffies(recal_guard_time); | |
df08ef27 AS |
689 | |
690 | return 0; | |
691 | } | |
692 | ||
693 | /* | |
20a4c261 PF |
694 | * This puts the touchpad in a power saving mode; according to ALPS, current |
695 | * consumption goes down to 50uA after running this. To turn power back on, | |
696 | * we drive MS-DAT low. Measuring with a 1mA resolution ammeter says that | |
697 | * the current on the SUS_3.3V rail drops from 3mA or 4mA to 0 when we do this. | |
698 | * | |
699 | * We have no formal spec that details this operation -- the low-power | |
700 | * sequence came from a long-lost email trail. | |
df08ef27 | 701 | */ |
20a4c261 | 702 | static int hgpk_toggle_powersave(struct psmouse *psmouse, int enable) |
df08ef27 AS |
703 | { |
704 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
705 | int timeo; | |
ca94ec43 | 706 | int err; |
df08ef27 AS |
707 | |
708 | /* Added on D-series touchpads */ | |
709 | if (psmouse->model < HGPK_MODEL_D) | |
710 | return 0; | |
711 | ||
712 | if (enable) { | |
713 | psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); | |
714 | ||
715 | /* | |
716 | * Sending a byte will drive MS-DAT low; this will wake up | |
717 | * the controller. Once we get an ACK back from it, it | |
718 | * means we can continue with the touchpad re-init. ALPS | |
719 | * tells us that 1s should be long enough, so set that as | |
20a4c261 | 720 | * the upper bound. (in practice, it takes about 3 loops.) |
df08ef27 AS |
721 | */ |
722 | for (timeo = 20; timeo > 0; timeo--) { | |
723 | if (!ps2_sendbyte(&psmouse->ps2dev, | |
724 | PSMOUSE_CMD_DISABLE, 20)) | |
725 | break; | |
20a4c261 | 726 | msleep(25); |
df08ef27 AS |
727 | } |
728 | ||
ca94ec43 DD |
729 | err = hgpk_reset_device(psmouse, false); |
730 | if (err) { | |
b5d21704 | 731 | psmouse_err(psmouse, "Failed to reset device!\n"); |
ca94ec43 DD |
732 | return err; |
733 | } | |
df08ef27 AS |
734 | |
735 | /* should be all set, enable the touchpad */ | |
736 | ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); | |
737 | psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); | |
b5d21704 | 738 | psmouse_dbg(psmouse, "Touchpad powered up.\n"); |
df08ef27 | 739 | } else { |
b5d21704 | 740 | psmouse_dbg(psmouse, "Powering off touchpad.\n"); |
df08ef27 AS |
741 | |
742 | if (ps2_command(ps2dev, NULL, 0xec) || | |
743 | ps2_command(ps2dev, NULL, 0xec) || | |
744 | ps2_command(ps2dev, NULL, 0xea)) { | |
745 | return -1; | |
746 | } | |
747 | ||
20a4c261 PF |
748 | psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
749 | ||
df08ef27 AS |
750 | /* probably won't see an ACK, the touchpad will be off */ |
751 | ps2_sendbyte(&psmouse->ps2dev, 0xec, 20); | |
752 | } | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | static int hgpk_poll(struct psmouse *psmouse) | |
758 | { | |
759 | /* We can't poll, so always return failure. */ | |
760 | return -1; | |
761 | } | |
762 | ||
763 | static int hgpk_reconnect(struct psmouse *psmouse) | |
764 | { | |
20a4c261 PF |
765 | struct hgpk_data *priv = psmouse->private; |
766 | ||
ca94ec43 DD |
767 | /* |
768 | * During suspend/resume the ps2 rails remain powered. We don't want | |
df08ef27 | 769 | * to do a reset because it's flush data out of buffers; however, |
ca94ec43 DD |
770 | * earlier prototypes (B1) had some brokenness that required a reset. |
771 | */ | |
df08ef27 AS |
772 | if (olpc_board_at_least(olpc_board(0xb2))) |
773 | if (psmouse->ps2dev.serio->dev.power.power_state.event != | |
774 | PM_EVENT_ON) | |
775 | return 0; | |
776 | ||
20a4c261 | 777 | priv->powered = 1; |
ca94ec43 | 778 | return hgpk_reset_device(psmouse, false); |
df08ef27 AS |
779 | } |
780 | ||
781 | static ssize_t hgpk_show_powered(struct psmouse *psmouse, void *data, char *buf) | |
782 | { | |
783 | struct hgpk_data *priv = psmouse->private; | |
784 | ||
785 | return sprintf(buf, "%d\n", priv->powered); | |
786 | } | |
787 | ||
788 | static ssize_t hgpk_set_powered(struct psmouse *psmouse, void *data, | |
789 | const char *buf, size_t count) | |
790 | { | |
791 | struct hgpk_data *priv = psmouse->private; | |
792 | unsigned long value; | |
793 | int err; | |
794 | ||
795 | err = strict_strtoul(buf, 10, &value); | |
796 | if (err || value > 1) | |
797 | return -EINVAL; | |
798 | ||
799 | if (value != priv->powered) { | |
800 | /* | |
801 | * hgpk_toggle_power will deal w/ state so | |
802 | * we're not racing w/ irq | |
803 | */ | |
20a4c261 | 804 | err = hgpk_toggle_powersave(psmouse, value); |
df08ef27 AS |
805 | if (!err) |
806 | priv->powered = value; | |
807 | } | |
808 | ||
809 | return err ? err : count; | |
810 | } | |
811 | ||
812 | __PSMOUSE_DEFINE_ATTR(powered, S_IWUSR | S_IRUGO, NULL, | |
b7802c5c | 813 | hgpk_show_powered, hgpk_set_powered, false); |
df08ef27 | 814 | |
ca94ec43 DD |
815 | static ssize_t attr_show_mode(struct psmouse *psmouse, void *data, char *buf) |
816 | { | |
817 | struct hgpk_data *priv = psmouse->private; | |
818 | ||
819 | return sprintf(buf, "%s\n", hgpk_mode_names[priv->mode]); | |
820 | } | |
821 | ||
822 | static ssize_t attr_set_mode(struct psmouse *psmouse, void *data, | |
823 | const char *buf, size_t len) | |
824 | { | |
825 | struct hgpk_data *priv = psmouse->private; | |
826 | enum hgpk_mode old_mode = priv->mode; | |
827 | enum hgpk_mode new_mode = hgpk_mode_from_name(buf, len); | |
828 | struct input_dev *old_dev = psmouse->dev; | |
829 | struct input_dev *new_dev; | |
830 | int err; | |
831 | ||
832 | if (new_mode == HGPK_MODE_INVALID) | |
833 | return -EINVAL; | |
834 | ||
835 | if (old_mode == new_mode) | |
836 | return len; | |
837 | ||
838 | new_dev = input_allocate_device(); | |
839 | if (!new_dev) | |
840 | return -ENOMEM; | |
841 | ||
842 | psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); | |
843 | ||
844 | /* Switch device into the new mode */ | |
845 | priv->mode = new_mode; | |
846 | err = hgpk_reset_device(psmouse, false); | |
847 | if (err) | |
848 | goto err_try_restore; | |
849 | ||
850 | hgpk_setup_input_device(new_dev, old_dev, new_mode); | |
851 | ||
852 | psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); | |
853 | ||
854 | err = input_register_device(new_dev); | |
855 | if (err) | |
856 | goto err_try_restore; | |
857 | ||
858 | psmouse->dev = new_dev; | |
859 | input_unregister_device(old_dev); | |
860 | ||
861 | return len; | |
862 | ||
863 | err_try_restore: | |
864 | input_free_device(new_dev); | |
865 | priv->mode = old_mode; | |
866 | hgpk_reset_device(psmouse, false); | |
867 | ||
868 | return err; | |
869 | } | |
870 | ||
871 | PSMOUSE_DEFINE_ATTR(hgpk_mode, S_IWUSR | S_IRUGO, NULL, | |
872 | attr_show_mode, attr_set_mode); | |
873 | ||
c46dd1eb PF |
874 | static ssize_t hgpk_trigger_recal_show(struct psmouse *psmouse, |
875 | void *data, char *buf) | |
876 | { | |
877 | return -EINVAL; | |
878 | } | |
879 | ||
880 | static ssize_t hgpk_trigger_recal(struct psmouse *psmouse, void *data, | |
881 | const char *buf, size_t count) | |
882 | { | |
883 | struct hgpk_data *priv = psmouse->private; | |
884 | unsigned long value; | |
885 | int err; | |
886 | ||
887 | err = strict_strtoul(buf, 10, &value); | |
888 | if (err || value != 1) | |
889 | return -EINVAL; | |
890 | ||
891 | /* | |
892 | * We queue work instead of doing recalibration right here | |
893 | * to avoid adding locking to to hgpk_force_recalibrate() | |
894 | * since workqueue provides serialization. | |
895 | */ | |
896 | psmouse_queue_work(psmouse, &priv->recalib_wq, 0); | |
897 | return count; | |
898 | } | |
899 | ||
900 | __PSMOUSE_DEFINE_ATTR(recalibrate, S_IWUSR | S_IRUGO, NULL, | |
b7802c5c | 901 | hgpk_trigger_recal_show, hgpk_trigger_recal, false); |
c46dd1eb | 902 | |
df08ef27 AS |
903 | static void hgpk_disconnect(struct psmouse *psmouse) |
904 | { | |
905 | struct hgpk_data *priv = psmouse->private; | |
906 | ||
907 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
908 | &psmouse_attr_powered.dattr); | |
ca94ec43 DD |
909 | device_remove_file(&psmouse->ps2dev.serio->dev, |
910 | &psmouse_attr_hgpk_mode.dattr); | |
c46dd1eb PF |
911 | |
912 | if (psmouse->model >= HGPK_MODEL_C) | |
913 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
914 | &psmouse_attr_recalibrate.dattr); | |
915 | ||
df08ef27 AS |
916 | psmouse_reset(psmouse); |
917 | kfree(priv); | |
918 | } | |
919 | ||
920 | static void hgpk_recalib_work(struct work_struct *work) | |
921 | { | |
bf6aede7 | 922 | struct delayed_work *w = to_delayed_work(work); |
df08ef27 AS |
923 | struct hgpk_data *priv = container_of(w, struct hgpk_data, recalib_wq); |
924 | struct psmouse *psmouse = priv->psmouse; | |
925 | ||
df08ef27 | 926 | if (hgpk_force_recalibrate(psmouse)) |
b5d21704 | 927 | psmouse_err(psmouse, "recalibration failed!\n"); |
df08ef27 AS |
928 | } |
929 | ||
930 | static int hgpk_register(struct psmouse *psmouse) | |
931 | { | |
ca94ec43 | 932 | struct hgpk_data *priv = psmouse->private; |
df08ef27 AS |
933 | int err; |
934 | ||
df08ef27 AS |
935 | /* register handlers */ |
936 | psmouse->protocol_handler = hgpk_process_byte; | |
937 | psmouse->poll = hgpk_poll; | |
938 | psmouse->disconnect = hgpk_disconnect; | |
939 | psmouse->reconnect = hgpk_reconnect; | |
df08ef27 AS |
940 | |
941 | /* Disable the idle resync. */ | |
942 | psmouse->resync_time = 0; | |
943 | /* Reset after a lot of bad bytes. */ | |
944 | psmouse->resetafter = 1024; | |
945 | ||
ca94ec43 DD |
946 | hgpk_setup_input_device(psmouse->dev, NULL, priv->mode); |
947 | ||
df08ef27 AS |
948 | err = device_create_file(&psmouse->ps2dev.serio->dev, |
949 | &psmouse_attr_powered.dattr); | |
c46dd1eb | 950 | if (err) { |
b5d21704 | 951 | psmouse_err(psmouse, "Failed creating 'powered' sysfs node\n"); |
c46dd1eb PF |
952 | return err; |
953 | } | |
954 | ||
ca94ec43 DD |
955 | err = device_create_file(&psmouse->ps2dev.serio->dev, |
956 | &psmouse_attr_hgpk_mode.dattr); | |
957 | if (err) { | |
b5d21704 DT |
958 | psmouse_err(psmouse, |
959 | "Failed creating 'hgpk_mode' sysfs node\n"); | |
ca94ec43 DD |
960 | goto err_remove_powered; |
961 | } | |
962 | ||
c46dd1eb PF |
963 | /* C-series touchpads added the recalibrate command */ |
964 | if (psmouse->model >= HGPK_MODEL_C) { | |
965 | err = device_create_file(&psmouse->ps2dev.serio->dev, | |
966 | &psmouse_attr_recalibrate.dattr); | |
967 | if (err) { | |
b5d21704 DT |
968 | psmouse_err(psmouse, |
969 | "Failed creating 'recalibrate' sysfs node\n"); | |
ca94ec43 | 970 | goto err_remove_mode; |
c46dd1eb PF |
971 | } |
972 | } | |
df08ef27 | 973 | |
c46dd1eb | 974 | return 0; |
ca94ec43 DD |
975 | |
976 | err_remove_mode: | |
977 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
978 | &psmouse_attr_hgpk_mode.dattr); | |
979 | err_remove_powered: | |
980 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
981 | &psmouse_attr_powered.dattr); | |
982 | return err; | |
df08ef27 AS |
983 | } |
984 | ||
985 | int hgpk_init(struct psmouse *psmouse) | |
986 | { | |
987 | struct hgpk_data *priv; | |
ca94ec43 | 988 | int err; |
df08ef27 AS |
989 | |
990 | priv = kzalloc(sizeof(struct hgpk_data), GFP_KERNEL); | |
ca94ec43 DD |
991 | if (!priv) { |
992 | err = -ENOMEM; | |
df08ef27 | 993 | goto alloc_fail; |
ca94ec43 | 994 | } |
df08ef27 AS |
995 | |
996 | psmouse->private = priv; | |
ca94ec43 | 997 | |
df08ef27 | 998 | priv->psmouse = psmouse; |
b7802c5c | 999 | priv->powered = true; |
ca94ec43 | 1000 | priv->mode = hgpk_default_mode; |
df08ef27 AS |
1001 | INIT_DELAYED_WORK(&priv->recalib_wq, hgpk_recalib_work); |
1002 | ||
ca94ec43 | 1003 | err = hgpk_reset_device(psmouse, false); |
df08ef27 AS |
1004 | if (err) |
1005 | goto init_fail; | |
1006 | ||
1007 | err = hgpk_register(psmouse); | |
1008 | if (err) | |
1009 | goto init_fail; | |
1010 | ||
1011 | return 0; | |
1012 | ||
1013 | init_fail: | |
1014 | kfree(priv); | |
1015 | alloc_fail: | |
1016 | return err; | |
1017 | } | |
1018 | ||
1019 | static enum hgpk_model_t hgpk_get_model(struct psmouse *psmouse) | |
1020 | { | |
1021 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
1022 | unsigned char param[3]; | |
1023 | ||
1024 | /* E7, E7, E7, E9 gets us a 3 byte identifier */ | |
1025 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || | |
1026 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || | |
1027 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || | |
1028 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
1029 | return -EIO; | |
1030 | } | |
1031 | ||
b5d21704 | 1032 | psmouse_dbg(psmouse, "ID: %02x %02x %02x\n", param[0], param[1], param[2]); |
df08ef27 AS |
1033 | |
1034 | /* HGPK signature: 0x67, 0x00, 0x<model> */ | |
1035 | if (param[0] != 0x67 || param[1] != 0x00) | |
1036 | return -ENODEV; | |
1037 | ||
b5d21704 | 1038 | psmouse_info(psmouse, "OLPC touchpad revision 0x%x\n", param[2]); |
df08ef27 AS |
1039 | |
1040 | return param[2]; | |
1041 | } | |
1042 | ||
b7802c5c | 1043 | int hgpk_detect(struct psmouse *psmouse, bool set_properties) |
df08ef27 AS |
1044 | { |
1045 | int version; | |
1046 | ||
1047 | version = hgpk_get_model(psmouse); | |
1048 | if (version < 0) | |
1049 | return version; | |
1050 | ||
1051 | if (set_properties) { | |
1052 | psmouse->vendor = "ALPS"; | |
1053 | psmouse->name = "HGPK"; | |
1054 | psmouse->model = version; | |
1055 | } | |
1056 | ||
1057 | return 0; | |
1058 | } | |
ca94ec43 DD |
1059 | |
1060 | void hgpk_module_init(void) | |
1061 | { | |
1062 | hgpk_default_mode = hgpk_mode_from_name(hgpk_mode_name, | |
1063 | strlen(hgpk_mode_name)); | |
1064 | if (hgpk_default_mode == HGPK_MODE_INVALID) { | |
1065 | hgpk_default_mode = HGPK_MODE_MOUSE; | |
1066 | strlcpy(hgpk_mode_name, hgpk_mode_names[HGPK_MODE_MOUSE], | |
1067 | sizeof(hgpk_mode_name)); | |
1068 | } | |
1069 | } |