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uwb: Use kcalloc instead of kzalloc to allocate array
[zen-stable.git] / drivers / input / mouse / psmouse-base.c
blob9f352fbd7b4f8342478b90c5b52c7cfd44be83af
1 /*
2 * PS/2 mouse driver
3 *
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2003-2004 Dmitry Torokhov
6 */
7
8 /*
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
12 */
13
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #define psmouse_fmt(fmt) fmt
16
17 #include <linux/delay.h>
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/interrupt.h>
21 #include <linux/input.h>
22 #include <linux/serio.h>
23 #include <linux/init.h>
24 #include <linux/libps2.h>
25 #include <linux/mutex.h>
26
27 #include "psmouse.h"
28 #include "synaptics.h"
29 #include "logips2pp.h"
30 #include "alps.h"
31 #include "hgpk.h"
32 #include "lifebook.h"
33 #include "trackpoint.h"
34 #include "touchkit_ps2.h"
35 #include "elantech.h"
36 #include "sentelic.h"
37
38 #define DRIVER_DESC "PS/2 mouse driver"
39
40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
41 MODULE_DESCRIPTION(DRIVER_DESC);
42 MODULE_LICENSE("GPL");
43
44 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
45 static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
46 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
47 static struct kernel_param_ops param_ops_proto_abbrev = {
48 .set = psmouse_set_maxproto,
49 .get = psmouse_get_maxproto,
50 };
51 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
52 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
53 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
54
55 static unsigned int psmouse_resolution = 200;
56 module_param_named(resolution, psmouse_resolution, uint, 0644);
57 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
58
59 static unsigned int psmouse_rate = 100;
60 module_param_named(rate, psmouse_rate, uint, 0644);
61 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
62
63 static unsigned int psmouse_smartscroll = 1;
64 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
65 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
66
67 static unsigned int psmouse_resetafter = 5;
68 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
69 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
70
71 static unsigned int psmouse_resync_time;
72 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
73 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
74
75 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
76 NULL,
77 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
78 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
79 (void *) offsetof(struct psmouse, rate),
80 psmouse_show_int_attr, psmouse_attr_set_rate);
81 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
82 (void *) offsetof(struct psmouse, resolution),
83 psmouse_show_int_attr, psmouse_attr_set_resolution);
84 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
85 (void *) offsetof(struct psmouse, resetafter),
86 psmouse_show_int_attr, psmouse_set_int_attr);
87 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
88 (void *) offsetof(struct psmouse, resync_time),
89 psmouse_show_int_attr, psmouse_set_int_attr);
90
91 static struct attribute *psmouse_attributes[] = {
92 &psmouse_attr_protocol.dattr.attr,
93 &psmouse_attr_rate.dattr.attr,
94 &psmouse_attr_resolution.dattr.attr,
95 &psmouse_attr_resetafter.dattr.attr,
96 &psmouse_attr_resync_time.dattr.attr,
97 NULL
98 };
99
100 static struct attribute_group psmouse_attribute_group = {
101 .attrs = psmouse_attributes,
102 };
103
104 /*
105 * psmouse_mutex protects all operations changing state of mouse
106 * (connecting, disconnecting, changing rate or resolution via
107 * sysfs). We could use a per-device semaphore but since there
108 * rarely more than one PS/2 mouse connected and since semaphore
109 * is taken in "slow" paths it is not worth it.
110 */
111 static DEFINE_MUTEX(psmouse_mutex);
112
113 static struct workqueue_struct *kpsmoused_wq;
114
115 struct psmouse_protocol {
116 enum psmouse_type type;
117 bool maxproto;
118 bool ignore_parity; /* Protocol should ignore parity errors from KBC */
119 const char *name;
120 const char *alias;
121 int (*detect)(struct psmouse *, bool);
122 int (*init)(struct psmouse *);
123 };
124
125 /*
126 * psmouse_process_byte() analyzes the PS/2 data stream and reports
127 * relevant events to the input module once full packet has arrived.
128 */
129
130 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
131 {
132 struct input_dev *dev = psmouse->dev;
133 unsigned char *packet = psmouse->packet;
134
135 if (psmouse->pktcnt < psmouse->pktsize)
136 return PSMOUSE_GOOD_DATA;
137
138 /*
139 * Full packet accumulated, process it
140 */
141
142 /*
143 * Scroll wheel on IntelliMice, scroll buttons on NetMice
144 */
145
146 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
147 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
148
149 /*
150 * Scroll wheel and buttons on IntelliMouse Explorer
151 */
152
153 if (psmouse->type == PSMOUSE_IMEX) {
154 switch (packet[3] & 0xC0) {
155 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
156 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
157 break;
158 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
159 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
160 break;
161 case 0x00:
162 case 0xC0:
163 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
164 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
165 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
166 break;
167 }
168 }
169
170 /*
171 * Extra buttons on Genius NewNet 3D
172 */
173
174 if (psmouse->type == PSMOUSE_GENPS) {
175 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
176 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
177 }
178
179 /*
180 * Extra button on ThinkingMouse
181 */
182 if (psmouse->type == PSMOUSE_THINKPS) {
183 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
184 /* Without this bit of weirdness moving up gives wildly high Y changes. */
185 packet[1] |= (packet[0] & 0x40) << 1;
186 }
187
188 /*
189 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
190 * byte.
191 */
192 if (psmouse->type == PSMOUSE_CORTRON) {
193 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
194 packet[0] |= 0x08;
195 }
196
197 /*
198 * Generic PS/2 Mouse
199 */
200
201 input_report_key(dev, BTN_LEFT, packet[0] & 1);
202 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
203 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
204
205 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
206 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
207
208 input_sync(dev);
209
210 return PSMOUSE_FULL_PACKET;
211 }
212
213 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
214 unsigned long delay)
215 {
216 queue_delayed_work(kpsmoused_wq, work, delay);
217 }
218
219 /*
220 * __psmouse_set_state() sets new psmouse state and resets all flags.
221 */
222
223 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
224 {
225 psmouse->state = new_state;
226 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
227 psmouse->ps2dev.flags = 0;
228 psmouse->last = jiffies;
229 }
230
231
232 /*
233 * psmouse_set_state() sets new psmouse state and resets all flags and
234 * counters while holding serio lock so fighting with interrupt handler
235 * is not a concern.
236 */
237
238 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
239 {
240 serio_pause_rx(psmouse->ps2dev.serio);
241 __psmouse_set_state(psmouse, new_state);
242 serio_continue_rx(psmouse->ps2dev.serio);
243 }
244
245 /*
246 * psmouse_handle_byte() processes one byte of the input data stream
247 * by calling corresponding protocol handler.
248 */
249
250 static int psmouse_handle_byte(struct psmouse *psmouse)
251 {
252 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
253
254 switch (rc) {
255 case PSMOUSE_BAD_DATA:
256 if (psmouse->state == PSMOUSE_ACTIVATED) {
257 psmouse_warn(psmouse,
258 "%s at %s lost sync at byte %d\n",
259 psmouse->name, psmouse->phys,
260 psmouse->pktcnt);
261 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
262 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
263 psmouse_notice(psmouse,
264 "issuing reconnect request\n");
265 serio_reconnect(psmouse->ps2dev.serio);
266 return -1;
267 }
268 }
269 psmouse->pktcnt = 0;
270 break;
271
272 case PSMOUSE_FULL_PACKET:
273 psmouse->pktcnt = 0;
274 if (psmouse->out_of_sync_cnt) {
275 psmouse->out_of_sync_cnt = 0;
276 psmouse_notice(psmouse,
277 "%s at %s - driver resynced.\n",
278 psmouse->name, psmouse->phys);
279 }
280 break;
281
282 case PSMOUSE_GOOD_DATA:
283 break;
284 }
285 return 0;
286 }
287
288 /*
289 * psmouse_interrupt() handles incoming characters, either passing them
290 * for normal processing or gathering them as command response.
291 */
292
293 static irqreturn_t psmouse_interrupt(struct serio *serio,
294 unsigned char data, unsigned int flags)
295 {
296 struct psmouse *psmouse = serio_get_drvdata(serio);
297
298 if (psmouse->state == PSMOUSE_IGNORE)
299 goto out;
300
301 if (unlikely((flags & SERIO_TIMEOUT) ||
302 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
303
304 if (psmouse->state == PSMOUSE_ACTIVATED)
305 psmouse_warn(psmouse,
306 "bad data from KBC -%s%s\n",
307 flags & SERIO_TIMEOUT ? " timeout" : "",
308 flags & SERIO_PARITY ? " bad parity" : "");
309 ps2_cmd_aborted(&psmouse->ps2dev);
310 goto out;
311 }
312
313 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
314 if (ps2_handle_ack(&psmouse->ps2dev, data))
315 goto out;
316
317 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
318 if (ps2_handle_response(&psmouse->ps2dev, data))
319 goto out;
320
321 if (psmouse->state <= PSMOUSE_RESYNCING)
322 goto out;
323
324 if (psmouse->state == PSMOUSE_ACTIVATED &&
325 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
326 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
327 psmouse->name, psmouse->phys, psmouse->pktcnt);
328 psmouse->badbyte = psmouse->packet[0];
329 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
330 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
331 goto out;
332 }
333
334 psmouse->packet[psmouse->pktcnt++] = data;
335 /*
336 * Check if this is a new device announcement (0xAA 0x00)
337 */
338 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
339 if (psmouse->pktcnt == 1) {
340 psmouse->last = jiffies;
341 goto out;
342 }
343
344 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
345 (psmouse->type == PSMOUSE_HGPK &&
346 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
347 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
348 serio_reconnect(serio);
349 goto out;
350 }
351 /*
352 * Not a new device, try processing first byte normally
353 */
354 psmouse->pktcnt = 1;
355 if (psmouse_handle_byte(psmouse))
356 goto out;
357
358 psmouse->packet[psmouse->pktcnt++] = data;
359 }
360
361 /*
362 * See if we need to force resync because mouse was idle for too long
363 */
364 if (psmouse->state == PSMOUSE_ACTIVATED &&
365 psmouse->pktcnt == 1 && psmouse->resync_time &&
366 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
367 psmouse->badbyte = psmouse->packet[0];
368 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
369 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
370 goto out;
371 }
372
373 psmouse->last = jiffies;
374 psmouse_handle_byte(psmouse);
375
376 out:
377 return IRQ_HANDLED;
378 }
379
380
381 /*
382 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
383 * using sliced syntax, understood by advanced devices, such as Logitech
384 * or Synaptics touchpads. The command is encoded as:
385 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
386 * is the command.
387 */
388 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
389 {
390 int i;
391
392 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
393 return -1;
394
395 for (i = 6; i >= 0; i -= 2) {
396 unsigned char d = (command >> i) & 3;
397 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
398 return -1;
399 }
400
401 return 0;
402 }
403
404
405 /*
406 * psmouse_reset() resets the mouse into power-on state.
407 */
408 int psmouse_reset(struct psmouse *psmouse)
409 {
410 unsigned char param[2];
411
412 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
413 return -1;
414
415 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
416 return -1;
417
418 return 0;
419 }
420
421
422 /*
423 * Genius NetMouse magic init.
424 */
425 static int genius_detect(struct psmouse *psmouse, bool set_properties)
426 {
427 struct ps2dev *ps2dev = &psmouse->ps2dev;
428 unsigned char param[4];
429
430 param[0] = 3;
431 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
432 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
433 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
434 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
435 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
436
437 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
438 return -1;
439
440 if (set_properties) {
441 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
442 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
443 __set_bit(BTN_SIDE, psmouse->dev->keybit);
444 __set_bit(REL_WHEEL, psmouse->dev->relbit);
445
446 psmouse->vendor = "Genius";
447 psmouse->name = "Mouse";
448 psmouse->pktsize = 4;
449 }
450
451 return 0;
452 }
453
454 /*
455 * IntelliMouse magic init.
456 */
457 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
458 {
459 struct ps2dev *ps2dev = &psmouse->ps2dev;
460 unsigned char param[2];
461
462 param[0] = 200;
463 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
464 param[0] = 100;
465 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
466 param[0] = 80;
467 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
468 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
469
470 if (param[0] != 3)
471 return -1;
472
473 if (set_properties) {
474 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
475 __set_bit(REL_WHEEL, psmouse->dev->relbit);
476
477 if (!psmouse->vendor)
478 psmouse->vendor = "Generic";
479 if (!psmouse->name)
480 psmouse->name = "Wheel Mouse";
481 psmouse->pktsize = 4;
482 }
483
484 return 0;
485 }
486
487 /*
488 * Try IntelliMouse/Explorer magic init.
489 */
490 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
491 {
492 struct ps2dev *ps2dev = &psmouse->ps2dev;
493 unsigned char param[2];
494
495 intellimouse_detect(psmouse, 0);
496
497 param[0] = 200;
498 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
499 param[0] = 200;
500 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
501 param[0] = 80;
502 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
503 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
504
505 if (param[0] != 4)
506 return -1;
507
508 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
509 param[0] = 200;
510 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
511 param[0] = 80;
512 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
513 param[0] = 40;
514 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
515
516 if (set_properties) {
517 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
518 __set_bit(REL_WHEEL, psmouse->dev->relbit);
519 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
520 __set_bit(BTN_SIDE, psmouse->dev->keybit);
521 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
522
523 if (!psmouse->vendor)
524 psmouse->vendor = "Generic";
525 if (!psmouse->name)
526 psmouse->name = "Explorer Mouse";
527 psmouse->pktsize = 4;
528 }
529
530 return 0;
531 }
532
533 /*
534 * Kensington ThinkingMouse / ExpertMouse magic init.
535 */
536 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
537 {
538 struct ps2dev *ps2dev = &psmouse->ps2dev;
539 unsigned char param[2];
540 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
541 int i;
542
543 param[0] = 10;
544 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
545 param[0] = 0;
546 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
547 for (i = 0; i < ARRAY_SIZE(seq); i++) {
548 param[0] = seq[i];
549 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
550 }
551 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
552
553 if (param[0] != 2)
554 return -1;
555
556 if (set_properties) {
557 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
558 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
559
560 psmouse->vendor = "Kensington";
561 psmouse->name = "ThinkingMouse";
562 }
563
564 return 0;
565 }
566
567 /*
568 * Bare PS/2 protocol "detection". Always succeeds.
569 */
570 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
571 {
572 if (set_properties) {
573 if (!psmouse->vendor)
574 psmouse->vendor = "Generic";
575 if (!psmouse->name)
576 psmouse->name = "Mouse";
577
578 /*
579 * We have no way of figuring true number of buttons so let's
580 * assume that the device has 3.
581 */
582 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
583 }
584
585 return 0;
586 }
587
588 /*
589 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
590 * must be forced by sysfs protocol writing.
591 */
592 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
593 {
594 if (set_properties) {
595 psmouse->vendor = "Cortron";
596 psmouse->name = "PS/2 Trackball";
597
598 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
599 __set_bit(BTN_SIDE, psmouse->dev->keybit);
600 }
601
602 return 0;
603 }
604
605 /*
606 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
607 * the mouse may have.
608 */
609
610 static int psmouse_extensions(struct psmouse *psmouse,
611 unsigned int max_proto, bool set_properties)
612 {
613 bool synaptics_hardware = false;
614
615 /*
616 * We always check for lifebook because it does not disturb mouse
617 * (it only checks DMI information).
618 */
619 if (lifebook_detect(psmouse, set_properties) == 0) {
620 if (max_proto > PSMOUSE_IMEX) {
621 if (!set_properties || lifebook_init(psmouse) == 0)
622 return PSMOUSE_LIFEBOOK;
623 }
624 }
625
626 /*
627 * Try Kensington ThinkingMouse (we try first, because synaptics probe
628 * upsets the thinkingmouse).
629 */
630
631 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
632 return PSMOUSE_THINKPS;
633
634 /*
635 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
636 * support is disabled in config - we need to know if it is synaptics so we
637 * can reset it properly after probing for intellimouse.
638 */
639 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
640 synaptics_hardware = true;
641
642 if (max_proto > PSMOUSE_IMEX) {
643 /*
644 * Try activating protocol, but check if support is enabled first, since
645 * we try detecting Synaptics even when protocol is disabled.
646 */
647 if (synaptics_supported() &&
648 (!set_properties || synaptics_init(psmouse) == 0)) {
649 return PSMOUSE_SYNAPTICS;
650 }
651
652 /*
653 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
654 * Unfortunately Logitech/Genius probes confuse some firmware versions so
655 * we'll have to skip them.
656 */
657 max_proto = PSMOUSE_IMEX;
658 }
659 /*
660 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
661 */
662 synaptics_reset(psmouse);
663 }
664
665 /*
666 * Try ALPS TouchPad
667 */
668 if (max_proto > PSMOUSE_IMEX) {
669 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
670 if (alps_detect(psmouse, set_properties) == 0) {
671 if (!set_properties || alps_init(psmouse) == 0)
672 return PSMOUSE_ALPS;
673 /*
674 * Init failed, try basic relative protocols
675 */
676 max_proto = PSMOUSE_IMEX;
677 }
678 }
679
680 /*
681 * Try OLPC HGPK touchpad.
682 */
683 if (max_proto > PSMOUSE_IMEX &&
684 hgpk_detect(psmouse, set_properties) == 0) {
685 if (!set_properties || hgpk_init(psmouse) == 0)
686 return PSMOUSE_HGPK;
687 /*
688 * Init failed, try basic relative protocols
689 */
690 max_proto = PSMOUSE_IMEX;
691 }
692
693 /*
694 * Try Elantech touchpad.
695 */
696 if (max_proto > PSMOUSE_IMEX &&
697 elantech_detect(psmouse, set_properties) == 0) {
698 if (!set_properties || elantech_init(psmouse) == 0)
699 return PSMOUSE_ELANTECH;
700 /*
701 * Init failed, try basic relative protocols
702 */
703 max_proto = PSMOUSE_IMEX;
704 }
705
706
707 if (max_proto > PSMOUSE_IMEX) {
708 if (genius_detect(psmouse, set_properties) == 0)
709 return PSMOUSE_GENPS;
710
711 if (ps2pp_init(psmouse, set_properties) == 0)
712 return PSMOUSE_PS2PP;
713
714 if (trackpoint_detect(psmouse, set_properties) == 0)
715 return PSMOUSE_TRACKPOINT;
716
717 if (touchkit_ps2_detect(psmouse, set_properties) == 0)
718 return PSMOUSE_TOUCHKIT_PS2;
719 }
720
721 /*
722 * Try Finger Sensing Pad. We do it here because its probe upsets
723 * Trackpoint devices (causing TP_READ_ID command to time out).
724 */
725 if (max_proto > PSMOUSE_IMEX) {
726 if (fsp_detect(psmouse, set_properties) == 0) {
727 if (!set_properties || fsp_init(psmouse) == 0)
728 return PSMOUSE_FSP;
729 /*
730 * Init failed, try basic relative protocols
731 */
732 max_proto = PSMOUSE_IMEX;
733 }
734 }
735
736 /*
737 * Reset to defaults in case the device got confused by extended
738 * protocol probes. Note that we follow up with full reset because
739 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
740 */
741 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
742 psmouse_reset(psmouse);
743
744 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
745 return PSMOUSE_IMEX;
746
747 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
748 return PSMOUSE_IMPS;
749
750 /*
751 * Okay, all failed, we have a standard mouse here. The number of the buttons
752 * is still a question, though. We assume 3.
753 */
754 ps2bare_detect(psmouse, set_properties);
755
756 if (synaptics_hardware) {
757 /*
758 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
759 * We need to reset the touchpad because if there is a track point on the
760 * pass through port it could get disabled while probing for protocol
761 * extensions.
762 */
763 psmouse_reset(psmouse);
764 }
765
766 return PSMOUSE_PS2;
767 }
768
769 static const struct psmouse_protocol psmouse_protocols[] = {
770 {
771 .type = PSMOUSE_PS2,
772 .name = "PS/2",
773 .alias = "bare",
774 .maxproto = true,
775 .ignore_parity = true,
776 .detect = ps2bare_detect,
777 },
778 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
779 {
780 .type = PSMOUSE_PS2PP,
781 .name = "PS2++",
782 .alias = "logitech",
783 .detect = ps2pp_init,
784 },
785 #endif
786 {
787 .type = PSMOUSE_THINKPS,
788 .name = "ThinkPS/2",
789 .alias = "thinkps",
790 .detect = thinking_detect,
791 },
792 {
793 .type = PSMOUSE_GENPS,
794 .name = "GenPS/2",
795 .alias = "genius",
796 .detect = genius_detect,
797 },
798 {
799 .type = PSMOUSE_IMPS,
800 .name = "ImPS/2",
801 .alias = "imps",
802 .maxproto = true,
803 .ignore_parity = true,
804 .detect = intellimouse_detect,
805 },
806 {
807 .type = PSMOUSE_IMEX,
808 .name = "ImExPS/2",
809 .alias = "exps",
810 .maxproto = true,
811 .ignore_parity = true,
812 .detect = im_explorer_detect,
813 },
814 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
815 {
816 .type = PSMOUSE_SYNAPTICS,
817 .name = "SynPS/2",
818 .alias = "synaptics",
819 .detect = synaptics_detect,
820 .init = synaptics_init,
821 },
822 #endif
823 #ifdef CONFIG_MOUSE_PS2_ALPS
824 {
825 .type = PSMOUSE_ALPS,
826 .name = "AlpsPS/2",
827 .alias = "alps",
828 .detect = alps_detect,
829 .init = alps_init,
830 },
831 #endif
832 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
833 {
834 .type = PSMOUSE_LIFEBOOK,
835 .name = "LBPS/2",
836 .alias = "lifebook",
837 .init = lifebook_init,
838 },
839 #endif
840 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
841 {
842 .type = PSMOUSE_TRACKPOINT,
843 .name = "TPPS/2",
844 .alias = "trackpoint",
845 .detect = trackpoint_detect,
846 },
847 #endif
848 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
849 {
850 .type = PSMOUSE_TOUCHKIT_PS2,
851 .name = "touchkitPS/2",
852 .alias = "touchkit",
853 .detect = touchkit_ps2_detect,
854 },
855 #endif
856 #ifdef CONFIG_MOUSE_PS2_OLPC
857 {
858 .type = PSMOUSE_HGPK,
859 .name = "OLPC HGPK",
860 .alias = "hgpk",
861 .detect = hgpk_detect,
862 },
863 #endif
864 #ifdef CONFIG_MOUSE_PS2_ELANTECH
865 {
866 .type = PSMOUSE_ELANTECH,
867 .name = "ETPS/2",
868 .alias = "elantech",
869 .detect = elantech_detect,
870 .init = elantech_init,
871 },
872 #endif
873 #ifdef CONFIG_MOUSE_PS2_SENTELIC
874 {
875 .type = PSMOUSE_FSP,
876 .name = "FSPPS/2",
877 .alias = "fsp",
878 .detect = fsp_detect,
879 .init = fsp_init,
880 },
881 #endif
882 {
883 .type = PSMOUSE_CORTRON,
884 .name = "CortronPS/2",
885 .alias = "cortps",
886 .detect = cortron_detect,
887 },
888 {
889 .type = PSMOUSE_AUTO,
890 .name = "auto",
891 .alias = "any",
892 .maxproto = true,
893 },
894 };
895
896 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
897 {
898 int i;
899
900 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
901 if (psmouse_protocols[i].type == type)
902 return &psmouse_protocols[i];
903
904 WARN_ON(1);
905 return &psmouse_protocols[0];
906 }
907
908 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
909 {
910 const struct psmouse_protocol *p;
911 int i;
912
913 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
914 p = &psmouse_protocols[i];
915
916 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
917 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
918 return &psmouse_protocols[i];
919 }
920
921 return NULL;
922 }
923
924
925 /*
926 * psmouse_probe() probes for a PS/2 mouse.
927 */
928
929 static int psmouse_probe(struct psmouse *psmouse)
930 {
931 struct ps2dev *ps2dev = &psmouse->ps2dev;
932 unsigned char param[2];
933
934 /*
935 * First, we check if it's a mouse. It should send 0x00 or 0x03
936 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
937 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
938 * ID queries, probably due to a firmware bug.
939 */
940
941 param[0] = 0xa5;
942 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
943 return -1;
944
945 if (param[0] != 0x00 && param[0] != 0x03 &&
946 param[0] != 0x04 && param[0] != 0xff)
947 return -1;
948
949 /*
950 * Then we reset and disable the mouse so that it doesn't generate events.
951 */
952
953 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
954 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
955 ps2dev->serio->phys);
956
957 return 0;
958 }
959
960 /*
961 * Here we set the mouse resolution.
962 */
963
964 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
965 {
966 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
967 unsigned char p;
968
969 if (resolution == 0 || resolution > 200)
970 resolution = 200;
971
972 p = params[resolution / 50];
973 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
974 psmouse->resolution = 25 << p;
975 }
976
977 /*
978 * Here we set the mouse report rate.
979 */
980
981 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
982 {
983 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
984 unsigned char r;
985 int i = 0;
986
987 while (rates[i] > rate) i++;
988 r = rates[i];
989 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
990 psmouse->rate = r;
991 }
992
993 /*
994 * psmouse_initialize() initializes the mouse to a sane state.
995 */
996
997 static void psmouse_initialize(struct psmouse *psmouse)
998 {
999 /*
1000 * We set the mouse report rate, resolution and scaling.
1001 */
1002
1003 if (psmouse_max_proto != PSMOUSE_PS2) {
1004 psmouse->set_rate(psmouse, psmouse->rate);
1005 psmouse->set_resolution(psmouse, psmouse->resolution);
1006 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
1007 }
1008 }
1009
1010 /*
1011 * psmouse_activate() enables the mouse so that we get motion reports from it.
1012 */
1013
1014 static void psmouse_activate(struct psmouse *psmouse)
1015 {
1016 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1017 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1018 psmouse->ps2dev.serio->phys);
1019
1020 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1021 }
1022
1023
1024 /*
1025 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
1026 * reports from it unless we explicitly request it.
1027 */
1028
1029 static void psmouse_deactivate(struct psmouse *psmouse)
1030 {
1031 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1032 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1033 psmouse->ps2dev.serio->phys);
1034
1035 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1036 }
1037
1038 /*
1039 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
1040 */
1041
1042 static int psmouse_poll(struct psmouse *psmouse)
1043 {
1044 return ps2_command(&psmouse->ps2dev, psmouse->packet,
1045 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
1046 }
1047
1048
1049 /*
1050 * psmouse_resync() attempts to re-validate current protocol.
1051 */
1052
1053 static void psmouse_resync(struct work_struct *work)
1054 {
1055 struct psmouse *parent = NULL, *psmouse =
1056 container_of(work, struct psmouse, resync_work.work);
1057 struct serio *serio = psmouse->ps2dev.serio;
1058 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1059 bool failed = false, enabled = false;
1060 int i;
1061
1062 mutex_lock(&psmouse_mutex);
1063
1064 if (psmouse->state != PSMOUSE_RESYNCING)
1065 goto out;
1066
1067 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1068 parent = serio_get_drvdata(serio->parent);
1069 psmouse_deactivate(parent);
1070 }
1071
1072 /*
1073 * Some mice don't ACK commands sent while they are in the middle of
1074 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1075 * instead of ps2_command() which would wait for 200ms for an ACK
1076 * that may never come.
1077 * As an additional quirk ALPS touchpads may not only forget to ACK
1078 * disable command but will stop reporting taps, so if we see that
1079 * mouse at least once ACKs disable we will do full reconnect if ACK
1080 * is missing.
1081 */
1082 psmouse->num_resyncs++;
1083
1084 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1085 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1086 failed = true;
1087 } else
1088 psmouse->acks_disable_command = true;
1089
1090 /*
1091 * Poll the mouse. If it was reset the packet will be shorter than
1092 * psmouse->pktsize and ps2_command will fail. We do not expect and
1093 * do not handle scenario when mouse "upgrades" its protocol while
1094 * disconnected since it would require additional delay. If we ever
1095 * see a mouse that does it we'll adjust the code.
1096 */
1097 if (!failed) {
1098 if (psmouse->poll(psmouse))
1099 failed = true;
1100 else {
1101 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1102 for (i = 0; i < psmouse->pktsize; i++) {
1103 psmouse->pktcnt++;
1104 rc = psmouse->protocol_handler(psmouse);
1105 if (rc != PSMOUSE_GOOD_DATA)
1106 break;
1107 }
1108 if (rc != PSMOUSE_FULL_PACKET)
1109 failed = true;
1110 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1111 }
1112 }
1113 /*
1114 * Now try to enable mouse. We try to do that even if poll failed and also
1115 * repeat our attempts 5 times, otherwise we may be left out with disabled
1116 * mouse.
1117 */
1118 for (i = 0; i < 5; i++) {
1119 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1120 enabled = true;
1121 break;
1122 }
1123 msleep(200);
1124 }
1125
1126 if (!enabled) {
1127 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1128 psmouse->ps2dev.serio->phys);
1129 failed = true;
1130 }
1131
1132 if (failed) {
1133 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1134 psmouse_info(psmouse,
1135 "resync failed, issuing reconnect request\n");
1136 serio_reconnect(serio);
1137 } else
1138 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1139
1140 if (parent)
1141 psmouse_activate(parent);
1142 out:
1143 mutex_unlock(&psmouse_mutex);
1144 }
1145
1146 /*
1147 * psmouse_cleanup() resets the mouse into power-on state.
1148 */
1149
1150 static void psmouse_cleanup(struct serio *serio)
1151 {
1152 struct psmouse *psmouse = serio_get_drvdata(serio);
1153 struct psmouse *parent = NULL;
1154
1155 mutex_lock(&psmouse_mutex);
1156
1157 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1158 parent = serio_get_drvdata(serio->parent);
1159 psmouse_deactivate(parent);
1160 }
1161
1162 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1163
1164 /*
1165 * Disable stream mode so cleanup routine can proceed undisturbed.
1166 */
1167 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1168 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1169 psmouse->ps2dev.serio->phys);
1170
1171 if (psmouse->cleanup)
1172 psmouse->cleanup(psmouse);
1173
1174 /*
1175 * Reset the mouse to defaults (bare PS/2 protocol).
1176 */
1177 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1178
1179 /*
1180 * Some boxes, such as HP nx7400, get terribly confused if mouse
1181 * is not fully enabled before suspending/shutting down.
1182 */
1183 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1184
1185 if (parent) {
1186 if (parent->pt_deactivate)
1187 parent->pt_deactivate(parent);
1188
1189 psmouse_activate(parent);
1190 }
1191
1192 mutex_unlock(&psmouse_mutex);
1193 }
1194
1195 /*
1196 * psmouse_disconnect() closes and frees.
1197 */
1198
1199 static void psmouse_disconnect(struct serio *serio)
1200 {
1201 struct psmouse *psmouse, *parent = NULL;
1202
1203 psmouse = serio_get_drvdata(serio);
1204
1205 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1206
1207 mutex_lock(&psmouse_mutex);
1208
1209 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1210
1211 /* make sure we don't have a resync in progress */
1212 mutex_unlock(&psmouse_mutex);
1213 flush_workqueue(kpsmoused_wq);
1214 mutex_lock(&psmouse_mutex);
1215
1216 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1217 parent = serio_get_drvdata(serio->parent);
1218 psmouse_deactivate(parent);
1219 }
1220
1221 if (psmouse->disconnect)
1222 psmouse->disconnect(psmouse);
1223
1224 if (parent && parent->pt_deactivate)
1225 parent->pt_deactivate(parent);
1226
1227 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1228
1229 serio_close(serio);
1230 serio_set_drvdata(serio, NULL);
1231 input_unregister_device(psmouse->dev);
1232 kfree(psmouse);
1233
1234 if (parent)
1235 psmouse_activate(parent);
1236
1237 mutex_unlock(&psmouse_mutex);
1238 }
1239
1240 static int psmouse_switch_protocol(struct psmouse *psmouse,
1241 const struct psmouse_protocol *proto)
1242 {
1243 const struct psmouse_protocol *selected_proto;
1244 struct input_dev *input_dev = psmouse->dev;
1245
1246 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1247
1248 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1249 input_dev->keybit[BIT_WORD(BTN_MOUSE)] =
1250 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1251 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1252
1253 psmouse->set_rate = psmouse_set_rate;
1254 psmouse->set_resolution = psmouse_set_resolution;
1255 psmouse->poll = psmouse_poll;
1256 psmouse->protocol_handler = psmouse_process_byte;
1257 psmouse->pktsize = 3;
1258
1259 if (proto && (proto->detect || proto->init)) {
1260 if (proto->detect && proto->detect(psmouse, true) < 0)
1261 return -1;
1262
1263 if (proto->init && proto->init(psmouse) < 0)
1264 return -1;
1265
1266 psmouse->type = proto->type;
1267 selected_proto = proto;
1268 } else {
1269 psmouse->type = psmouse_extensions(psmouse,
1270 psmouse_max_proto, true);
1271 selected_proto = psmouse_protocol_by_type(psmouse->type);
1272 }
1273
1274 psmouse->ignore_parity = selected_proto->ignore_parity;
1275
1276 /*
1277 * If mouse's packet size is 3 there is no point in polling the
1278 * device in hopes to detect protocol reset - we won't get less
1279 * than 3 bytes response anyhow.
1280 */
1281 if (psmouse->pktsize == 3)
1282 psmouse->resync_time = 0;
1283
1284 /*
1285 * Some smart KVMs fake response to POLL command returning just
1286 * 3 bytes and messing up our resync logic, so if initial poll
1287 * fails we won't try polling the device anymore. Hopefully
1288 * such KVM will maintain initially selected protocol.
1289 */
1290 if (psmouse->resync_time && psmouse->poll(psmouse))
1291 psmouse->resync_time = 0;
1292
1293 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1294 selected_proto->name, psmouse->vendor, psmouse->name);
1295
1296 input_dev->name = psmouse->devname;
1297 input_dev->phys = psmouse->phys;
1298 input_dev->id.bustype = BUS_I8042;
1299 input_dev->id.vendor = 0x0002;
1300 input_dev->id.product = psmouse->type;
1301 input_dev->id.version = psmouse->model;
1302
1303 return 0;
1304 }
1305
1306 /*
1307 * psmouse_connect() is a callback from the serio module when
1308 * an unhandled serio port is found.
1309 */
1310 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1311 {
1312 struct psmouse *psmouse, *parent = NULL;
1313 struct input_dev *input_dev;
1314 int retval = 0, error = -ENOMEM;
1315
1316 mutex_lock(&psmouse_mutex);
1317
1318 /*
1319 * If this is a pass-through port deactivate parent so the device
1320 * connected to this port can be successfully identified
1321 */
1322 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1323 parent = serio_get_drvdata(serio->parent);
1324 psmouse_deactivate(parent);
1325 }
1326
1327 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1328 input_dev = input_allocate_device();
1329 if (!psmouse || !input_dev)
1330 goto err_free;
1331
1332 ps2_init(&psmouse->ps2dev, serio);
1333 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1334 psmouse->dev = input_dev;
1335 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1336
1337 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1338
1339 serio_set_drvdata(serio, psmouse);
1340
1341 error = serio_open(serio, drv);
1342 if (error)
1343 goto err_clear_drvdata;
1344
1345 if (psmouse_probe(psmouse) < 0) {
1346 error = -ENODEV;
1347 goto err_close_serio;
1348 }
1349
1350 psmouse->rate = psmouse_rate;
1351 psmouse->resolution = psmouse_resolution;
1352 psmouse->resetafter = psmouse_resetafter;
1353 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1354 psmouse->smartscroll = psmouse_smartscroll;
1355
1356 psmouse_switch_protocol(psmouse, NULL);
1357
1358 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1359 psmouse_initialize(psmouse);
1360
1361 error = input_register_device(psmouse->dev);
1362 if (error)
1363 goto err_protocol_disconnect;
1364
1365 if (parent && parent->pt_activate)
1366 parent->pt_activate(parent);
1367
1368 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1369 if (error)
1370 goto err_pt_deactivate;
1371
1372 psmouse_activate(psmouse);
1373
1374 out:
1375 /* If this is a pass-through port the parent needs to be re-activated */
1376 if (parent)
1377 psmouse_activate(parent);
1378
1379 mutex_unlock(&psmouse_mutex);
1380 return retval;
1381
1382 err_pt_deactivate:
1383 if (parent && parent->pt_deactivate)
1384 parent->pt_deactivate(parent);
1385 input_unregister_device(psmouse->dev);
1386 input_dev = NULL; /* so we don't try to free it below */
1387 err_protocol_disconnect:
1388 if (psmouse->disconnect)
1389 psmouse->disconnect(psmouse);
1390 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1391 err_close_serio:
1392 serio_close(serio);
1393 err_clear_drvdata:
1394 serio_set_drvdata(serio, NULL);
1395 err_free:
1396 input_free_device(input_dev);
1397 kfree(psmouse);
1398
1399 retval = error;
1400 goto out;
1401 }
1402
1403
1404 static int psmouse_reconnect(struct serio *serio)
1405 {
1406 struct psmouse *psmouse = serio_get_drvdata(serio);
1407 struct psmouse *parent = NULL;
1408 struct serio_driver *drv = serio->drv;
1409 unsigned char type;
1410 int rc = -1;
1411
1412 if (!drv || !psmouse) {
1413 psmouse_dbg(psmouse,
1414 "reconnect request, but serio is disconnected, ignoring...\n");
1415 return -1;
1416 }
1417
1418 mutex_lock(&psmouse_mutex);
1419
1420 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1421 parent = serio_get_drvdata(serio->parent);
1422 psmouse_deactivate(parent);
1423 }
1424
1425 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1426
1427 if (psmouse->reconnect) {
1428 if (psmouse->reconnect(psmouse))
1429 goto out;
1430 } else {
1431 psmouse_reset(psmouse);
1432
1433 if (psmouse_probe(psmouse) < 0)
1434 goto out;
1435
1436 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1437 if (psmouse->type != type)
1438 goto out;
1439 }
1440
1441 /*
1442 * OK, the device type (and capabilities) match the old one,
1443 * we can continue using it, complete initialization
1444 */
1445 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1446
1447 psmouse_initialize(psmouse);
1448
1449 if (parent && parent->pt_activate)
1450 parent->pt_activate(parent);
1451
1452 psmouse_activate(psmouse);
1453 rc = 0;
1454
1455 out:
1456 /* If this is a pass-through port the parent waits to be activated */
1457 if (parent)
1458 psmouse_activate(parent);
1459
1460 mutex_unlock(&psmouse_mutex);
1461 return rc;
1462 }
1463
1464 static struct serio_device_id psmouse_serio_ids[] = {
1465 {
1466 .type = SERIO_8042,
1467 .proto = SERIO_ANY,
1468 .id = SERIO_ANY,
1469 .extra = SERIO_ANY,
1470 },
1471 {
1472 .type = SERIO_PS_PSTHRU,
1473 .proto = SERIO_ANY,
1474 .id = SERIO_ANY,
1475 .extra = SERIO_ANY,
1476 },
1477 { 0 }
1478 };
1479
1480 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1481
1482 static struct serio_driver psmouse_drv = {
1483 .driver = {
1484 .name = "psmouse",
1485 },
1486 .description = DRIVER_DESC,
1487 .id_table = psmouse_serio_ids,
1488 .interrupt = psmouse_interrupt,
1489 .connect = psmouse_connect,
1490 .reconnect = psmouse_reconnect,
1491 .disconnect = psmouse_disconnect,
1492 .cleanup = psmouse_cleanup,
1493 };
1494
1495 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1496 char *buf)
1497 {
1498 struct serio *serio = to_serio_port(dev);
1499 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1500 struct psmouse *psmouse;
1501
1502 psmouse = serio_get_drvdata(serio);
1503
1504 return attr->show(psmouse, attr->data, buf);
1505 }
1506
1507 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1508 const char *buf, size_t count)
1509 {
1510 struct serio *serio = to_serio_port(dev);
1511 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1512 struct psmouse *psmouse, *parent = NULL;
1513 int retval;
1514
1515 retval = mutex_lock_interruptible(&psmouse_mutex);
1516 if (retval)
1517 goto out;
1518
1519 psmouse = serio_get_drvdata(serio);
1520
1521 if (attr->protect) {
1522 if (psmouse->state == PSMOUSE_IGNORE) {
1523 retval = -ENODEV;
1524 goto out_unlock;
1525 }
1526
1527 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1528 parent = serio_get_drvdata(serio->parent);
1529 psmouse_deactivate(parent);
1530 }
1531
1532 psmouse_deactivate(psmouse);
1533 }
1534
1535 retval = attr->set(psmouse, attr->data, buf, count);
1536
1537 if (attr->protect) {
1538 if (retval != -ENODEV)
1539 psmouse_activate(psmouse);
1540
1541 if (parent)
1542 psmouse_activate(parent);
1543 }
1544
1545 out_unlock:
1546 mutex_unlock(&psmouse_mutex);
1547 out:
1548 return retval;
1549 }
1550
1551 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1552 {
1553 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1554
1555 return sprintf(buf, "%u\n", *field);
1556 }
1557
1558 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1559 {
1560 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1561 unsigned long value;
1562
1563 if (strict_strtoul(buf, 10, &value))
1564 return -EINVAL;
1565
1566 if ((unsigned int)value != value)
1567 return -EINVAL;
1568
1569 *field = value;
1570
1571 return count;
1572 }
1573
1574 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1575 {
1576 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1577 }
1578
1579 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1580 {
1581 struct serio *serio = psmouse->ps2dev.serio;
1582 struct psmouse *parent = NULL;
1583 struct input_dev *old_dev, *new_dev;
1584 const struct psmouse_protocol *proto, *old_proto;
1585 int error;
1586 int retry = 0;
1587
1588 proto = psmouse_protocol_by_name(buf, count);
1589 if (!proto)
1590 return -EINVAL;
1591
1592 if (psmouse->type == proto->type)
1593 return count;
1594
1595 new_dev = input_allocate_device();
1596 if (!new_dev)
1597 return -ENOMEM;
1598
1599 while (!list_empty(&serio->children)) {
1600 if (++retry > 3) {
1601 psmouse_warn(psmouse,
1602 "failed to destroy children ports, protocol change aborted.\n");
1603 input_free_device(new_dev);
1604 return -EIO;
1605 }
1606
1607 mutex_unlock(&psmouse_mutex);
1608 serio_unregister_child_port(serio);
1609 mutex_lock(&psmouse_mutex);
1610
1611 if (serio->drv != &psmouse_drv) {
1612 input_free_device(new_dev);
1613 return -ENODEV;
1614 }
1615
1616 if (psmouse->type == proto->type) {
1617 input_free_device(new_dev);
1618 return count; /* switched by other thread */
1619 }
1620 }
1621
1622 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1623 parent = serio_get_drvdata(serio->parent);
1624 if (parent->pt_deactivate)
1625 parent->pt_deactivate(parent);
1626 }
1627
1628 old_dev = psmouse->dev;
1629 old_proto = psmouse_protocol_by_type(psmouse->type);
1630
1631 if (psmouse->disconnect)
1632 psmouse->disconnect(psmouse);
1633
1634 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1635
1636 psmouse->dev = new_dev;
1637 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1638
1639 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1640 psmouse_reset(psmouse);
1641 /* default to PSMOUSE_PS2 */
1642 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1643 }
1644
1645 psmouse_initialize(psmouse);
1646 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1647
1648 error = input_register_device(psmouse->dev);
1649 if (error) {
1650 if (psmouse->disconnect)
1651 psmouse->disconnect(psmouse);
1652
1653 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1654 input_free_device(new_dev);
1655 psmouse->dev = old_dev;
1656 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1657 psmouse_switch_protocol(psmouse, old_proto);
1658 psmouse_initialize(psmouse);
1659 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1660
1661 return error;
1662 }
1663
1664 input_unregister_device(old_dev);
1665
1666 if (parent && parent->pt_activate)
1667 parent->pt_activate(parent);
1668
1669 return count;
1670 }
1671
1672 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1673 {
1674 unsigned long value;
1675
1676 if (strict_strtoul(buf, 10, &value))
1677 return -EINVAL;
1678
1679 psmouse->set_rate(psmouse, value);
1680 return count;
1681 }
1682
1683 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1684 {
1685 unsigned long value;
1686
1687 if (strict_strtoul(buf, 10, &value))
1688 return -EINVAL;
1689
1690 psmouse->set_resolution(psmouse, value);
1691 return count;
1692 }
1693
1694
1695 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1696 {
1697 const struct psmouse_protocol *proto;
1698
1699 if (!val)
1700 return -EINVAL;
1701
1702 proto = psmouse_protocol_by_name(val, strlen(val));
1703
1704 if (!proto || !proto->maxproto)
1705 return -EINVAL;
1706
1707 *((unsigned int *)kp->arg) = proto->type;
1708
1709 return 0;
1710 }
1711
1712 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1713 {
1714 int type = *((unsigned int *)kp->arg);
1715
1716 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
1717 }
1718
1719 static int __init psmouse_init(void)
1720 {
1721 int err;
1722
1723 lifebook_module_init();
1724 synaptics_module_init();
1725 hgpk_module_init();
1726
1727 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1728 if (!kpsmoused_wq) {
1729 pr_err("failed to create kpsmoused workqueue\n");
1730 return -ENOMEM;
1731 }
1732
1733 err = serio_register_driver(&psmouse_drv);
1734 if (err)
1735 destroy_workqueue(kpsmoused_wq);
1736
1737 return err;
1738 }
1739
1740 static void __exit psmouse_exit(void)
1741 {
1742 serio_unregister_driver(&psmouse_drv);
1743 destroy_workqueue(kpsmoused_wq);
1744 }
1745
1746 module_init(psmouse_init);
1747 module_exit(psmouse_exit);