Commit | Line | Data |
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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 | 336 | psmouse_dbg(psmouse, |
fb4f552e AS |
337 | "bad data, mode %d (%d) %*ph\n", |
338 | priv->mode, pktcnt, 6, psmouse->packet); | |
ca94ec43 DD |
339 | |
340 | return valid; | |
df08ef27 AS |
341 | } |
342 | ||
ca94ec43 | 343 | static void hgpk_process_advanced_packet(struct psmouse *psmouse) |
df08ef27 | 344 | { |
ca94ec43 DD |
345 | struct hgpk_data *priv = psmouse->private; |
346 | struct input_dev *idev = psmouse->dev; | |
df08ef27 | 347 | unsigned char *packet = psmouse->packet; |
ca94ec43 DD |
348 | int down = !!(packet[2] & 2); |
349 | int left = !!(packet[3] & 1); | |
350 | int right = !!(packet[3] & 2); | |
351 | int x = packet[1] | ((packet[2] & 0x78) << 4); | |
352 | int y = packet[4] | ((packet[3] & 0x70) << 3); | |
353 | ||
354 | if (priv->mode == HGPK_MODE_GLIDESENSOR) { | |
355 | int pt_down = !!(packet[2] & 1); | |
356 | int finger_down = !!(packet[2] & 2); | |
357 | int z = packet[5]; | |
358 | ||
359 | input_report_abs(idev, ABS_PRESSURE, z); | |
360 | if (tpdebug) | |
b5d21704 DT |
361 | psmouse_dbg(psmouse, "pd=%d fd=%d z=%d", |
362 | pt_down, finger_down, z); | |
ca94ec43 DD |
363 | } else { |
364 | /* | |
365 | * PenTablet mode does not report pressure, so we don't | |
366 | * report it here | |
367 | */ | |
368 | if (tpdebug) | |
b5d21704 | 369 | psmouse_dbg(psmouse, "pd=%d ", down); |
ca94ec43 | 370 | } |
df08ef27 | 371 | |
ca94ec43 | 372 | if (tpdebug) |
b5d21704 DT |
373 | psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", |
374 | left, right, x, y); | |
df08ef27 | 375 | |
ca94ec43 DD |
376 | input_report_key(idev, BTN_TOUCH, down); |
377 | input_report_key(idev, BTN_LEFT, left); | |
378 | input_report_key(idev, BTN_RIGHT, right); | |
379 | ||
380 | /* | |
381 | * If this packet says that the finger was removed, reset our position | |
382 | * tracking so that we don't erroneously detect a jump on next press. | |
383 | */ | |
c0dc8342 | 384 | if (!down) { |
a309cdc7 | 385 | hgpk_reset_hack_state(psmouse); |
c0dc8342 DD |
386 | goto done; |
387 | } | |
ca94ec43 DD |
388 | |
389 | /* | |
c0dc8342 DD |
390 | * Weed out duplicate packets (we get quite a few, and they mess up |
391 | * our jump detection) | |
ca94ec43 | 392 | */ |
c0dc8342 DD |
393 | if (x == priv->abs_x && y == priv->abs_y) { |
394 | if (++priv->dupe_count > SPEW_WATCH_COUNT) { | |
395 | if (tpdebug) | |
b5d21704 | 396 | psmouse_dbg(psmouse, "hard spew detected\n"); |
c0dc8342 DD |
397 | priv->spew_flag = RECALIBRATING; |
398 | psmouse_queue_work(psmouse, &priv->recalib_wq, | |
399 | msecs_to_jiffies(spew_delay)); | |
ca94ec43 | 400 | } |
c0dc8342 DD |
401 | goto done; |
402 | } | |
ca94ec43 | 403 | |
c0dc8342 DD |
404 | /* not a duplicate, continue with position reporting */ |
405 | priv->dupe_count = 0; | |
406 | ||
407 | /* Don't apply hacks in PT mode, it seems reliable */ | |
408 | if (priv->mode != HGPK_MODE_PENTABLET && priv->abs_x != -1) { | |
a309cdc7 DD |
409 | int x_diff = priv->abs_x - x; |
410 | int y_diff = priv->abs_y - y; | |
411 | if (hgpk_discard_decay_hack(psmouse, x_diff, y_diff)) { | |
412 | if (tpdebug) | |
b5d21704 | 413 | psmouse_dbg(psmouse, "discarding\n"); |
a309cdc7 DD |
414 | goto done; |
415 | } | |
416 | hgpk_spewing_hack(psmouse, left, right, x_diff, y_diff); | |
ca94ec43 DD |
417 | } |
418 | ||
c0dc8342 DD |
419 | input_report_abs(idev, ABS_X, x); |
420 | input_report_abs(idev, ABS_Y, y); | |
421 | priv->abs_x = x; | |
422 | priv->abs_y = y; | |
423 | ||
424 | done: | |
ca94ec43 DD |
425 | input_sync(idev); |
426 | } | |
427 | ||
428 | static void hgpk_process_simple_packet(struct psmouse *psmouse) | |
429 | { | |
430 | struct input_dev *dev = psmouse->dev; | |
431 | unsigned char *packet = psmouse->packet; | |
432 | int left = packet[0] & 1; | |
433 | int right = (packet[0] >> 1) & 1; | |
434 | int x = packet[1] - ((packet[0] << 4) & 0x100); | |
435 | int y = ((packet[0] << 3) & 0x100) - packet[2]; | |
df08ef27 | 436 | |
67f56bb0 | 437 | if (packet[0] & 0xc0) |
b5d21704 DT |
438 | psmouse_dbg(psmouse, |
439 | "overflow -- 0x%02x 0x%02x 0x%02x\n", | |
440 | packet[0], packet[1], packet[2]); | |
67f56bb0 | 441 | |
a309cdc7 DD |
442 | if (hgpk_discard_decay_hack(psmouse, x, y)) { |
443 | if (tpdebug) | |
b5d21704 | 444 | psmouse_dbg(psmouse, "discarding\n"); |
a309cdc7 DD |
445 | return; |
446 | } | |
447 | ||
df08ef27 AS |
448 | hgpk_spewing_hack(psmouse, left, right, x, y); |
449 | ||
450 | if (tpdebug) | |
b5d21704 DT |
451 | psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", |
452 | left, right, x, y); | |
df08ef27 AS |
453 | |
454 | input_report_key(dev, BTN_LEFT, left); | |
455 | input_report_key(dev, BTN_RIGHT, right); | |
456 | ||
457 | input_report_rel(dev, REL_X, x); | |
458 | input_report_rel(dev, REL_Y, y); | |
459 | ||
460 | input_sync(dev); | |
461 | } | |
462 | ||
463 | static psmouse_ret_t hgpk_process_byte(struct psmouse *psmouse) | |
464 | { | |
465 | struct hgpk_data *priv = psmouse->private; | |
466 | ||
ca94ec43 | 467 | if (!hgpk_is_byte_valid(psmouse, psmouse->packet)) |
df08ef27 | 468 | return PSMOUSE_BAD_DATA; |
df08ef27 AS |
469 | |
470 | if (psmouse->pktcnt >= psmouse->pktsize) { | |
ca94ec43 DD |
471 | if (priv->mode == HGPK_MODE_MOUSE) |
472 | hgpk_process_simple_packet(psmouse); | |
473 | else | |
474 | hgpk_process_advanced_packet(psmouse); | |
df08ef27 AS |
475 | return PSMOUSE_FULL_PACKET; |
476 | } | |
477 | ||
478 | if (priv->recalib_window) { | |
479 | if (time_before(jiffies, priv->recalib_window)) { | |
480 | /* | |
481 | * ugh, got a packet inside our recalibration | |
482 | * window, schedule another recalibration. | |
483 | */ | |
b5d21704 DT |
484 | psmouse_dbg(psmouse, |
485 | "packet inside calibration window, queueing another recalibration\n"); | |
df08ef27 | 486 | psmouse_queue_work(psmouse, &priv->recalib_wq, |
8bbf2703 | 487 | msecs_to_jiffies(post_interrupt_delay)); |
df08ef27 AS |
488 | } |
489 | priv->recalib_window = 0; | |
490 | } | |
491 | ||
492 | return PSMOUSE_GOOD_DATA; | |
493 | } | |
494 | ||
ca94ec43 DD |
495 | static int hgpk_select_mode(struct psmouse *psmouse) |
496 | { | |
497 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
498 | struct hgpk_data *priv = psmouse->private; | |
499 | int i; | |
500 | int cmd; | |
501 | ||
502 | /* | |
503 | * 4 disables to enable advanced mode | |
504 | * then 3 0xf2 bytes as the preamble for GS/PT selection | |
505 | */ | |
506 | const int advanced_init[] = { | |
507 | PSMOUSE_CMD_DISABLE, PSMOUSE_CMD_DISABLE, | |
508 | PSMOUSE_CMD_DISABLE, PSMOUSE_CMD_DISABLE, | |
509 | 0xf2, 0xf2, 0xf2, | |
510 | }; | |
511 | ||
512 | switch (priv->mode) { | |
513 | case HGPK_MODE_MOUSE: | |
514 | psmouse->pktsize = 3; | |
515 | break; | |
516 | ||
517 | case HGPK_MODE_GLIDESENSOR: | |
518 | case HGPK_MODE_PENTABLET: | |
519 | psmouse->pktsize = 6; | |
520 | ||
521 | /* Switch to 'Advanced mode.', four disables in a row. */ | |
522 | for (i = 0; i < ARRAY_SIZE(advanced_init); i++) | |
523 | if (ps2_command(ps2dev, NULL, advanced_init[i])) | |
524 | return -EIO; | |
525 | ||
526 | /* select between GlideSensor (mouse) or PenTablet */ | |
527 | cmd = priv->mode == HGPK_MODE_GLIDESENSOR ? | |
528 | PSMOUSE_CMD_SETSCALE11 : PSMOUSE_CMD_SETSCALE21; | |
529 | ||
530 | if (ps2_command(ps2dev, NULL, cmd)) | |
531 | return -EIO; | |
532 | break; | |
533 | ||
534 | default: | |
535 | return -EINVAL; | |
536 | } | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | static void hgpk_setup_input_device(struct input_dev *input, | |
542 | struct input_dev *old_input, | |
543 | enum hgpk_mode mode) | |
544 | { | |
545 | if (old_input) { | |
546 | input->name = old_input->name; | |
547 | input->phys = old_input->phys; | |
548 | input->id = old_input->id; | |
549 | input->dev.parent = old_input->dev.parent; | |
550 | } | |
551 | ||
552 | memset(input->evbit, 0, sizeof(input->evbit)); | |
553 | memset(input->relbit, 0, sizeof(input->relbit)); | |
554 | memset(input->keybit, 0, sizeof(input->keybit)); | |
555 | ||
556 | /* All modes report left and right buttons */ | |
557 | __set_bit(EV_KEY, input->evbit); | |
558 | __set_bit(BTN_LEFT, input->keybit); | |
559 | __set_bit(BTN_RIGHT, input->keybit); | |
560 | ||
561 | switch (mode) { | |
562 | case HGPK_MODE_MOUSE: | |
563 | __set_bit(EV_REL, input->evbit); | |
564 | __set_bit(REL_X, input->relbit); | |
565 | __set_bit(REL_Y, input->relbit); | |
566 | break; | |
567 | ||
568 | case HGPK_MODE_GLIDESENSOR: | |
569 | __set_bit(BTN_TOUCH, input->keybit); | |
570 | __set_bit(BTN_TOOL_FINGER, input->keybit); | |
571 | ||
572 | __set_bit(EV_ABS, input->evbit); | |
573 | ||
574 | /* GlideSensor has pressure sensor, PenTablet does not */ | |
575 | input_set_abs_params(input, ABS_PRESSURE, 0, 15, 0, 0); | |
576 | ||
577 | /* From device specs */ | |
578 | input_set_abs_params(input, ABS_X, 0, 399, 0, 0); | |
579 | input_set_abs_params(input, ABS_Y, 0, 290, 0, 0); | |
580 | ||
581 | /* Calculated by hand based on usable size (52mm x 38mm) */ | |
582 | input_abs_set_res(input, ABS_X, 8); | |
583 | input_abs_set_res(input, ABS_Y, 8); | |
584 | break; | |
585 | ||
586 | case HGPK_MODE_PENTABLET: | |
587 | __set_bit(BTN_TOUCH, input->keybit); | |
588 | __set_bit(BTN_TOOL_FINGER, input->keybit); | |
589 | ||
590 | __set_bit(EV_ABS, input->evbit); | |
591 | ||
592 | /* From device specs */ | |
593 | input_set_abs_params(input, ABS_X, 0, 999, 0, 0); | |
594 | input_set_abs_params(input, ABS_Y, 5, 239, 0, 0); | |
595 | ||
596 | /* Calculated by hand based on usable size (156mm x 38mm) */ | |
597 | input_abs_set_res(input, ABS_X, 6); | |
598 | input_abs_set_res(input, ABS_Y, 8); | |
599 | break; | |
600 | ||
601 | default: | |
602 | BUG(); | |
603 | } | |
604 | } | |
605 | ||
ca94ec43 DD |
606 | static int hgpk_reset_device(struct psmouse *psmouse, bool recalibrate) |
607 | { | |
608 | int err; | |
609 | ||
610 | psmouse_reset(psmouse); | |
611 | ||
612 | if (recalibrate) { | |
613 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
614 | ||
615 | /* send the recalibrate request */ | |
616 | if (ps2_command(ps2dev, NULL, 0xf5) || | |
617 | ps2_command(ps2dev, NULL, 0xf5) || | |
618 | ps2_command(ps2dev, NULL, 0xe6) || | |
619 | ps2_command(ps2dev, NULL, 0xf5)) { | |
620 | return -1; | |
621 | } | |
622 | ||
623 | /* according to ALPS, 150mS is required for recalibration */ | |
624 | msleep(150); | |
625 | } | |
626 | ||
627 | err = hgpk_select_mode(psmouse); | |
628 | if (err) { | |
b5d21704 | 629 | psmouse_err(psmouse, "failed to select mode\n"); |
ca94ec43 DD |
630 | return err; |
631 | } | |
632 | ||
633 | hgpk_reset_hack_state(psmouse); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
df08ef27 AS |
638 | static int hgpk_force_recalibrate(struct psmouse *psmouse) |
639 | { | |
df08ef27 | 640 | struct hgpk_data *priv = psmouse->private; |
ca94ec43 | 641 | int err; |
df08ef27 AS |
642 | |
643 | /* C-series touchpads added the recalibrate command */ | |
644 | if (psmouse->model < HGPK_MODEL_C) | |
645 | return 0; | |
646 | ||
34caed20 | 647 | if (!autorecal) { |
b5d21704 | 648 | psmouse_dbg(psmouse, "recalibration disabled, ignoring\n"); |
34caed20 DD |
649 | return 0; |
650 | } | |
651 | ||
b5d21704 | 652 | psmouse_dbg(psmouse, "recalibrating touchpad..\n"); |
34caed20 | 653 | |
df08ef27 AS |
654 | /* we don't want to race with the irq handler, nor with resyncs */ |
655 | psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); | |
656 | ||
657 | /* start by resetting the device */ | |
ca94ec43 DD |
658 | err = hgpk_reset_device(psmouse, true); |
659 | if (err) | |
660 | return err; | |
df08ef27 | 661 | |
ca94ec43 DD |
662 | /* |
663 | * XXX: If a finger is down during this delay, recalibration will | |
df08ef27 AS |
664 | * detect capacitance incorrectly. This is a hardware bug, and |
665 | * we don't have a good way to deal with it. The 2s window stuff | |
666 | * (below) is our best option for now. | |
667 | */ | |
c35c0e7d | 668 | if (psmouse_activate(psmouse)) |
df08ef27 AS |
669 | return -1; |
670 | ||
34caed20 | 671 | if (tpdebug) |
b5d21704 | 672 | psmouse_dbg(psmouse, "touchpad reactivated\n"); |
34caed20 | 673 | |
ca94ec43 | 674 | /* |
34caed20 DD |
675 | * If we get packets right away after recalibrating, it's likely |
676 | * that a finger was on the touchpad. If so, it's probably | |
677 | * miscalibrated, so we optionally schedule another. | |
df08ef27 | 678 | */ |
34caed20 DD |
679 | if (recal_guard_time) |
680 | priv->recalib_window = jiffies + | |
681 | msecs_to_jiffies(recal_guard_time); | |
df08ef27 AS |
682 | |
683 | return 0; | |
684 | } | |
685 | ||
686 | /* | |
20a4c261 PF |
687 | * This puts the touchpad in a power saving mode; according to ALPS, current |
688 | * consumption goes down to 50uA after running this. To turn power back on, | |
689 | * we drive MS-DAT low. Measuring with a 1mA resolution ammeter says that | |
690 | * the current on the SUS_3.3V rail drops from 3mA or 4mA to 0 when we do this. | |
691 | * | |
692 | * We have no formal spec that details this operation -- the low-power | |
693 | * sequence came from a long-lost email trail. | |
df08ef27 | 694 | */ |
20a4c261 | 695 | static int hgpk_toggle_powersave(struct psmouse *psmouse, int enable) |
df08ef27 AS |
696 | { |
697 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
698 | int timeo; | |
ca94ec43 | 699 | int err; |
df08ef27 AS |
700 | |
701 | /* Added on D-series touchpads */ | |
702 | if (psmouse->model < HGPK_MODEL_D) | |
703 | return 0; | |
704 | ||
705 | if (enable) { | |
706 | psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); | |
707 | ||
708 | /* | |
709 | * Sending a byte will drive MS-DAT low; this will wake up | |
710 | * the controller. Once we get an ACK back from it, it | |
711 | * means we can continue with the touchpad re-init. ALPS | |
712 | * tells us that 1s should be long enough, so set that as | |
20a4c261 | 713 | * the upper bound. (in practice, it takes about 3 loops.) |
df08ef27 AS |
714 | */ |
715 | for (timeo = 20; timeo > 0; timeo--) { | |
716 | if (!ps2_sendbyte(&psmouse->ps2dev, | |
717 | PSMOUSE_CMD_DISABLE, 20)) | |
718 | break; | |
20a4c261 | 719 | msleep(25); |
df08ef27 AS |
720 | } |
721 | ||
ca94ec43 DD |
722 | err = hgpk_reset_device(psmouse, false); |
723 | if (err) { | |
b5d21704 | 724 | psmouse_err(psmouse, "Failed to reset device!\n"); |
ca94ec43 DD |
725 | return err; |
726 | } | |
df08ef27 AS |
727 | |
728 | /* should be all set, enable the touchpad */ | |
c35c0e7d | 729 | psmouse_activate(psmouse); |
b5d21704 | 730 | psmouse_dbg(psmouse, "Touchpad powered up.\n"); |
df08ef27 | 731 | } else { |
b5d21704 | 732 | psmouse_dbg(psmouse, "Powering off touchpad.\n"); |
df08ef27 AS |
733 | |
734 | if (ps2_command(ps2dev, NULL, 0xec) || | |
735 | ps2_command(ps2dev, NULL, 0xec) || | |
736 | ps2_command(ps2dev, NULL, 0xea)) { | |
737 | return -1; | |
738 | } | |
739 | ||
20a4c261 PF |
740 | psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
741 | ||
df08ef27 AS |
742 | /* probably won't see an ACK, the touchpad will be off */ |
743 | ps2_sendbyte(&psmouse->ps2dev, 0xec, 20); | |
744 | } | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
749 | static int hgpk_poll(struct psmouse *psmouse) | |
750 | { | |
751 | /* We can't poll, so always return failure. */ | |
752 | return -1; | |
753 | } | |
754 | ||
755 | static int hgpk_reconnect(struct psmouse *psmouse) | |
756 | { | |
20a4c261 PF |
757 | struct hgpk_data *priv = psmouse->private; |
758 | ||
ca94ec43 DD |
759 | /* |
760 | * During suspend/resume the ps2 rails remain powered. We don't want | |
df08ef27 | 761 | * to do a reset because it's flush data out of buffers; however, |
ca94ec43 DD |
762 | * earlier prototypes (B1) had some brokenness that required a reset. |
763 | */ | |
df08ef27 AS |
764 | if (olpc_board_at_least(olpc_board(0xb2))) |
765 | if (psmouse->ps2dev.serio->dev.power.power_state.event != | |
766 | PM_EVENT_ON) | |
767 | return 0; | |
768 | ||
20a4c261 | 769 | priv->powered = 1; |
ca94ec43 | 770 | return hgpk_reset_device(psmouse, false); |
df08ef27 AS |
771 | } |
772 | ||
773 | static ssize_t hgpk_show_powered(struct psmouse *psmouse, void *data, char *buf) | |
774 | { | |
775 | struct hgpk_data *priv = psmouse->private; | |
776 | ||
777 | return sprintf(buf, "%d\n", priv->powered); | |
778 | } | |
779 | ||
780 | static ssize_t hgpk_set_powered(struct psmouse *psmouse, void *data, | |
781 | const char *buf, size_t count) | |
782 | { | |
783 | struct hgpk_data *priv = psmouse->private; | |
76496e7a | 784 | unsigned int value; |
df08ef27 AS |
785 | int err; |
786 | ||
76496e7a JD |
787 | err = kstrtouint(buf, 10, &value); |
788 | if (err) | |
789 | return err; | |
790 | ||
791 | if (value > 1) | |
df08ef27 AS |
792 | return -EINVAL; |
793 | ||
794 | if (value != priv->powered) { | |
795 | /* | |
796 | * hgpk_toggle_power will deal w/ state so | |
797 | * we're not racing w/ irq | |
798 | */ | |
20a4c261 | 799 | err = hgpk_toggle_powersave(psmouse, value); |
df08ef27 AS |
800 | if (!err) |
801 | priv->powered = value; | |
802 | } | |
803 | ||
804 | return err ? err : count; | |
805 | } | |
806 | ||
807 | __PSMOUSE_DEFINE_ATTR(powered, S_IWUSR | S_IRUGO, NULL, | |
b7802c5c | 808 | hgpk_show_powered, hgpk_set_powered, false); |
df08ef27 | 809 | |
ca94ec43 DD |
810 | static ssize_t attr_show_mode(struct psmouse *psmouse, void *data, char *buf) |
811 | { | |
812 | struct hgpk_data *priv = psmouse->private; | |
813 | ||
814 | return sprintf(buf, "%s\n", hgpk_mode_names[priv->mode]); | |
815 | } | |
816 | ||
817 | static ssize_t attr_set_mode(struct psmouse *psmouse, void *data, | |
818 | const char *buf, size_t len) | |
819 | { | |
820 | struct hgpk_data *priv = psmouse->private; | |
821 | enum hgpk_mode old_mode = priv->mode; | |
822 | enum hgpk_mode new_mode = hgpk_mode_from_name(buf, len); | |
823 | struct input_dev *old_dev = psmouse->dev; | |
824 | struct input_dev *new_dev; | |
825 | int err; | |
826 | ||
827 | if (new_mode == HGPK_MODE_INVALID) | |
828 | return -EINVAL; | |
829 | ||
830 | if (old_mode == new_mode) | |
831 | return len; | |
832 | ||
833 | new_dev = input_allocate_device(); | |
834 | if (!new_dev) | |
835 | return -ENOMEM; | |
836 | ||
837 | psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); | |
838 | ||
839 | /* Switch device into the new mode */ | |
840 | priv->mode = new_mode; | |
841 | err = hgpk_reset_device(psmouse, false); | |
842 | if (err) | |
843 | goto err_try_restore; | |
844 | ||
845 | hgpk_setup_input_device(new_dev, old_dev, new_mode); | |
846 | ||
847 | psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); | |
848 | ||
849 | err = input_register_device(new_dev); | |
850 | if (err) | |
851 | goto err_try_restore; | |
852 | ||
853 | psmouse->dev = new_dev; | |
854 | input_unregister_device(old_dev); | |
855 | ||
856 | return len; | |
857 | ||
858 | err_try_restore: | |
859 | input_free_device(new_dev); | |
860 | priv->mode = old_mode; | |
861 | hgpk_reset_device(psmouse, false); | |
862 | ||
863 | return err; | |
864 | } | |
865 | ||
866 | PSMOUSE_DEFINE_ATTR(hgpk_mode, S_IWUSR | S_IRUGO, NULL, | |
867 | attr_show_mode, attr_set_mode); | |
868 | ||
c46dd1eb PF |
869 | static ssize_t hgpk_trigger_recal_show(struct psmouse *psmouse, |
870 | void *data, char *buf) | |
871 | { | |
872 | return -EINVAL; | |
873 | } | |
874 | ||
875 | static ssize_t hgpk_trigger_recal(struct psmouse *psmouse, void *data, | |
876 | const char *buf, size_t count) | |
877 | { | |
878 | struct hgpk_data *priv = psmouse->private; | |
76496e7a | 879 | unsigned int value; |
c46dd1eb PF |
880 | int err; |
881 | ||
76496e7a JD |
882 | err = kstrtouint(buf, 10, &value); |
883 | if (err) | |
884 | return err; | |
885 | ||
886 | if (value != 1) | |
c46dd1eb PF |
887 | return -EINVAL; |
888 | ||
889 | /* | |
890 | * We queue work instead of doing recalibration right here | |
891 | * to avoid adding locking to to hgpk_force_recalibrate() | |
892 | * since workqueue provides serialization. | |
893 | */ | |
894 | psmouse_queue_work(psmouse, &priv->recalib_wq, 0); | |
895 | return count; | |
896 | } | |
897 | ||
898 | __PSMOUSE_DEFINE_ATTR(recalibrate, S_IWUSR | S_IRUGO, NULL, | |
b7802c5c | 899 | hgpk_trigger_recal_show, hgpk_trigger_recal, false); |
c46dd1eb | 900 | |
df08ef27 AS |
901 | static void hgpk_disconnect(struct psmouse *psmouse) |
902 | { | |
903 | struct hgpk_data *priv = psmouse->private; | |
904 | ||
905 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
906 | &psmouse_attr_powered.dattr); | |
ca94ec43 DD |
907 | device_remove_file(&psmouse->ps2dev.serio->dev, |
908 | &psmouse_attr_hgpk_mode.dattr); | |
c46dd1eb PF |
909 | |
910 | if (psmouse->model >= HGPK_MODEL_C) | |
911 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
912 | &psmouse_attr_recalibrate.dattr); | |
913 | ||
df08ef27 AS |
914 | psmouse_reset(psmouse); |
915 | kfree(priv); | |
916 | } | |
917 | ||
918 | static void hgpk_recalib_work(struct work_struct *work) | |
919 | { | |
bf6aede7 | 920 | struct delayed_work *w = to_delayed_work(work); |
df08ef27 AS |
921 | struct hgpk_data *priv = container_of(w, struct hgpk_data, recalib_wq); |
922 | struct psmouse *psmouse = priv->psmouse; | |
923 | ||
df08ef27 | 924 | if (hgpk_force_recalibrate(psmouse)) |
b5d21704 | 925 | psmouse_err(psmouse, "recalibration failed!\n"); |
df08ef27 AS |
926 | } |
927 | ||
928 | static int hgpk_register(struct psmouse *psmouse) | |
929 | { | |
ca94ec43 | 930 | struct hgpk_data *priv = psmouse->private; |
df08ef27 AS |
931 | int err; |
932 | ||
df08ef27 AS |
933 | /* register handlers */ |
934 | psmouse->protocol_handler = hgpk_process_byte; | |
935 | psmouse->poll = hgpk_poll; | |
936 | psmouse->disconnect = hgpk_disconnect; | |
937 | psmouse->reconnect = hgpk_reconnect; | |
df08ef27 AS |
938 | |
939 | /* Disable the idle resync. */ | |
940 | psmouse->resync_time = 0; | |
941 | /* Reset after a lot of bad bytes. */ | |
942 | psmouse->resetafter = 1024; | |
943 | ||
ca94ec43 DD |
944 | hgpk_setup_input_device(psmouse->dev, NULL, priv->mode); |
945 | ||
df08ef27 AS |
946 | err = device_create_file(&psmouse->ps2dev.serio->dev, |
947 | &psmouse_attr_powered.dattr); | |
c46dd1eb | 948 | if (err) { |
b5d21704 | 949 | psmouse_err(psmouse, "Failed creating 'powered' sysfs node\n"); |
c46dd1eb PF |
950 | return err; |
951 | } | |
952 | ||
ca94ec43 DD |
953 | err = device_create_file(&psmouse->ps2dev.serio->dev, |
954 | &psmouse_attr_hgpk_mode.dattr); | |
955 | if (err) { | |
b5d21704 DT |
956 | psmouse_err(psmouse, |
957 | "Failed creating 'hgpk_mode' sysfs node\n"); | |
ca94ec43 DD |
958 | goto err_remove_powered; |
959 | } | |
960 | ||
c46dd1eb PF |
961 | /* C-series touchpads added the recalibrate command */ |
962 | if (psmouse->model >= HGPK_MODEL_C) { | |
963 | err = device_create_file(&psmouse->ps2dev.serio->dev, | |
964 | &psmouse_attr_recalibrate.dattr); | |
965 | if (err) { | |
b5d21704 DT |
966 | psmouse_err(psmouse, |
967 | "Failed creating 'recalibrate' sysfs node\n"); | |
ca94ec43 | 968 | goto err_remove_mode; |
c46dd1eb PF |
969 | } |
970 | } | |
df08ef27 | 971 | |
c46dd1eb | 972 | return 0; |
ca94ec43 DD |
973 | |
974 | err_remove_mode: | |
975 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
976 | &psmouse_attr_hgpk_mode.dattr); | |
977 | err_remove_powered: | |
978 | device_remove_file(&psmouse->ps2dev.serio->dev, | |
979 | &psmouse_attr_powered.dattr); | |
980 | return err; | |
df08ef27 AS |
981 | } |
982 | ||
983 | int hgpk_init(struct psmouse *psmouse) | |
984 | { | |
985 | struct hgpk_data *priv; | |
ca94ec43 | 986 | int err; |
df08ef27 AS |
987 | |
988 | priv = kzalloc(sizeof(struct hgpk_data), GFP_KERNEL); | |
ca94ec43 DD |
989 | if (!priv) { |
990 | err = -ENOMEM; | |
df08ef27 | 991 | goto alloc_fail; |
ca94ec43 | 992 | } |
df08ef27 AS |
993 | |
994 | psmouse->private = priv; | |
ca94ec43 | 995 | |
df08ef27 | 996 | priv->psmouse = psmouse; |
b7802c5c | 997 | priv->powered = true; |
ca94ec43 | 998 | priv->mode = hgpk_default_mode; |
df08ef27 AS |
999 | INIT_DELAYED_WORK(&priv->recalib_wq, hgpk_recalib_work); |
1000 | ||
ca94ec43 | 1001 | err = hgpk_reset_device(psmouse, false); |
df08ef27 AS |
1002 | if (err) |
1003 | goto init_fail; | |
1004 | ||
1005 | err = hgpk_register(psmouse); | |
1006 | if (err) | |
1007 | goto init_fail; | |
1008 | ||
1009 | return 0; | |
1010 | ||
1011 | init_fail: | |
1012 | kfree(priv); | |
1013 | alloc_fail: | |
1014 | return err; | |
1015 | } | |
1016 | ||
1017 | static enum hgpk_model_t hgpk_get_model(struct psmouse *psmouse) | |
1018 | { | |
1019 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
1020 | unsigned char param[3]; | |
1021 | ||
1022 | /* E7, E7, E7, E9 gets us a 3 byte identifier */ | |
1023 | if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || | |
1024 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || | |
1025 | ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || | |
1026 | ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { | |
1027 | return -EIO; | |
1028 | } | |
1029 | ||
fb4f552e | 1030 | psmouse_dbg(psmouse, "ID: %*ph\n", 3, param); |
df08ef27 AS |
1031 | |
1032 | /* HGPK signature: 0x67, 0x00, 0x<model> */ | |
1033 | if (param[0] != 0x67 || param[1] != 0x00) | |
1034 | return -ENODEV; | |
1035 | ||
b5d21704 | 1036 | psmouse_info(psmouse, "OLPC touchpad revision 0x%x\n", param[2]); |
df08ef27 AS |
1037 | |
1038 | return param[2]; | |
1039 | } | |
1040 | ||
b7802c5c | 1041 | int hgpk_detect(struct psmouse *psmouse, bool set_properties) |
df08ef27 AS |
1042 | { |
1043 | int version; | |
1044 | ||
1045 | version = hgpk_get_model(psmouse); | |
1046 | if (version < 0) | |
1047 | return version; | |
1048 | ||
1049 | if (set_properties) { | |
1050 | psmouse->vendor = "ALPS"; | |
1051 | psmouse->name = "HGPK"; | |
1052 | psmouse->model = version; | |
1053 | } | |
1054 | ||
1055 | return 0; | |
1056 | } | |
ca94ec43 DD |
1057 | |
1058 | void hgpk_module_init(void) | |
1059 | { | |
1060 | hgpk_default_mode = hgpk_mode_from_name(hgpk_mode_name, | |
1061 | strlen(hgpk_mode_name)); | |
1062 | if (hgpk_default_mode == HGPK_MODE_INVALID) { | |
1063 | hgpk_default_mode = HGPK_MODE_MOUSE; | |
1064 | strlcpy(hgpk_mode_name, hgpk_mode_names[HGPK_MODE_MOUSE], | |
1065 | sizeof(hgpk_mode_name)); | |
1066 | } | |
1067 | } |