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sched: Remove double_rq_lock() from __migrate_task()
[linux/fpc-iii.git] / drivers / input / mouse / psmouse-base.c
blobcff065f6261cf31a3188226f14fe28e9291f6770
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 #include "cypress_ps2.h"
38
39 #define DRIVER_DESC "PS/2 mouse driver"
40
41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
42 MODULE_DESCRIPTION(DRIVER_DESC);
43 MODULE_LICENSE("GPL");
44
45 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
46 static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
47 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
48 static struct kernel_param_ops param_ops_proto_abbrev = {
49 .set = psmouse_set_maxproto,
50 .get = psmouse_get_maxproto,
51 };
52 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
53 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
54 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
55
56 static unsigned int psmouse_resolution = 200;
57 module_param_named(resolution, psmouse_resolution, uint, 0644);
58 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
59
60 static unsigned int psmouse_rate = 100;
61 module_param_named(rate, psmouse_rate, uint, 0644);
62 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
63
64 static bool psmouse_smartscroll = 1;
65 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
66 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
67
68 static unsigned int psmouse_resetafter = 5;
69 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
70 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
71
72 static unsigned int psmouse_resync_time;
73 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
74 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
75
76 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
77 NULL,
78 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
79 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
80 (void *) offsetof(struct psmouse, rate),
81 psmouse_show_int_attr, psmouse_attr_set_rate);
82 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
83 (void *) offsetof(struct psmouse, resolution),
84 psmouse_show_int_attr, psmouse_attr_set_resolution);
85 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
86 (void *) offsetof(struct psmouse, resetafter),
87 psmouse_show_int_attr, psmouse_set_int_attr);
88 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
89 (void *) offsetof(struct psmouse, resync_time),
90 psmouse_show_int_attr, psmouse_set_int_attr);
91
92 static struct attribute *psmouse_attributes[] = {
93 &psmouse_attr_protocol.dattr.attr,
94 &psmouse_attr_rate.dattr.attr,
95 &psmouse_attr_resolution.dattr.attr,
96 &psmouse_attr_resetafter.dattr.attr,
97 &psmouse_attr_resync_time.dattr.attr,
98 NULL
99 };
100
101 static struct attribute_group psmouse_attribute_group = {
102 .attrs = psmouse_attributes,
103 };
104
105 /*
106 * psmouse_mutex protects all operations changing state of mouse
107 * (connecting, disconnecting, changing rate or resolution via
108 * sysfs). We could use a per-device semaphore but since there
109 * rarely more than one PS/2 mouse connected and since semaphore
110 * is taken in "slow" paths it is not worth it.
111 */
112 static DEFINE_MUTEX(psmouse_mutex);
113
114 static struct workqueue_struct *kpsmoused_wq;
115
116 struct psmouse_protocol {
117 enum psmouse_type type;
118 bool maxproto;
119 bool ignore_parity; /* Protocol should ignore parity errors from KBC */
120 const char *name;
121 const char *alias;
122 int (*detect)(struct psmouse *, bool);
123 int (*init)(struct psmouse *);
124 };
125
126 /*
127 * psmouse_process_byte() analyzes the PS/2 data stream and reports
128 * relevant events to the input module once full packet has arrived.
129 */
130
131 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
132 {
133 struct input_dev *dev = psmouse->dev;
134 unsigned char *packet = psmouse->packet;
135
136 if (psmouse->pktcnt < psmouse->pktsize)
137 return PSMOUSE_GOOD_DATA;
138
139 /*
140 * Full packet accumulated, process it
141 */
142
143 /*
144 * Scroll wheel on IntelliMice, scroll buttons on NetMice
145 */
146
147 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
148 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
149
150 /*
151 * Scroll wheel and buttons on IntelliMouse Explorer
152 */
153
154 if (psmouse->type == PSMOUSE_IMEX) {
155 switch (packet[3] & 0xC0) {
156 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
157 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
158 break;
159 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
160 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
161 break;
162 case 0x00:
163 case 0xC0:
164 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
165 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
166 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
167 break;
168 }
169 }
170
171 /*
172 * Extra buttons on Genius NewNet 3D
173 */
174
175 if (psmouse->type == PSMOUSE_GENPS) {
176 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
177 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
178 }
179
180 /*
181 * Extra button on ThinkingMouse
182 */
183 if (psmouse->type == PSMOUSE_THINKPS) {
184 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
185 /* Without this bit of weirdness moving up gives wildly high Y changes. */
186 packet[1] |= (packet[0] & 0x40) << 1;
187 }
188
189 /*
190 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
191 * byte.
192 */
193 if (psmouse->type == PSMOUSE_CORTRON) {
194 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
195 packet[0] |= 0x08;
196 }
197
198 /*
199 * Generic PS/2 Mouse
200 */
201
202 input_report_key(dev, BTN_LEFT, packet[0] & 1);
203 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
204 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
205
206 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
207 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
208
209 input_sync(dev);
210
211 return PSMOUSE_FULL_PACKET;
212 }
213
214 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
215 unsigned long delay)
216 {
217 queue_delayed_work(kpsmoused_wq, work, delay);
218 }
219
220 /*
221 * __psmouse_set_state() sets new psmouse state and resets all flags.
222 */
223
224 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
225 {
226 psmouse->state = new_state;
227 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
228 psmouse->ps2dev.flags = 0;
229 psmouse->last = jiffies;
230 }
231
232
233 /*
234 * psmouse_set_state() sets new psmouse state and resets all flags and
235 * counters while holding serio lock so fighting with interrupt handler
236 * is not a concern.
237 */
238
239 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
240 {
241 serio_pause_rx(psmouse->ps2dev.serio);
242 __psmouse_set_state(psmouse, new_state);
243 serio_continue_rx(psmouse->ps2dev.serio);
244 }
245
246 /*
247 * psmouse_handle_byte() processes one byte of the input data stream
248 * by calling corresponding protocol handler.
249 */
250
251 static int psmouse_handle_byte(struct psmouse *psmouse)
252 {
253 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
254
255 switch (rc) {
256 case PSMOUSE_BAD_DATA:
257 if (psmouse->state == PSMOUSE_ACTIVATED) {
258 psmouse_warn(psmouse,
259 "%s at %s lost sync at byte %d\n",
260 psmouse->name, psmouse->phys,
261 psmouse->pktcnt);
262 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
263 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
264 psmouse_notice(psmouse,
265 "issuing reconnect request\n");
266 serio_reconnect(psmouse->ps2dev.serio);
267 return -1;
268 }
269 }
270 psmouse->pktcnt = 0;
271 break;
272
273 case PSMOUSE_FULL_PACKET:
274 psmouse->pktcnt = 0;
275 if (psmouse->out_of_sync_cnt) {
276 psmouse->out_of_sync_cnt = 0;
277 psmouse_notice(psmouse,
278 "%s at %s - driver resynced.\n",
279 psmouse->name, psmouse->phys);
280 }
281 break;
282
283 case PSMOUSE_GOOD_DATA:
284 break;
285 }
286 return 0;
287 }
288
289 /*
290 * psmouse_interrupt() handles incoming characters, either passing them
291 * for normal processing or gathering them as command response.
292 */
293
294 static irqreturn_t psmouse_interrupt(struct serio *serio,
295 unsigned char data, unsigned int flags)
296 {
297 struct psmouse *psmouse = serio_get_drvdata(serio);
298
299 if (psmouse->state == PSMOUSE_IGNORE)
300 goto out;
301
302 if (unlikely((flags & SERIO_TIMEOUT) ||
303 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
304
305 if (psmouse->state == PSMOUSE_ACTIVATED)
306 psmouse_warn(psmouse,
307 "bad data from KBC -%s%s\n",
308 flags & SERIO_TIMEOUT ? " timeout" : "",
309 flags & SERIO_PARITY ? " bad parity" : "");
310 ps2_cmd_aborted(&psmouse->ps2dev);
311 goto out;
312 }
313
314 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
315 if (ps2_handle_ack(&psmouse->ps2dev, data))
316 goto out;
317
318 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
319 if (ps2_handle_response(&psmouse->ps2dev, data))
320 goto out;
321
322 if (psmouse->state <= PSMOUSE_RESYNCING)
323 goto out;
324
325 if (psmouse->state == PSMOUSE_ACTIVATED &&
326 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
327 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
328 psmouse->name, psmouse->phys, psmouse->pktcnt);
329 psmouse->badbyte = psmouse->packet[0];
330 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
331 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
332 goto out;
333 }
334
335 psmouse->packet[psmouse->pktcnt++] = data;
336 /*
337 * Check if this is a new device announcement (0xAA 0x00)
338 */
339 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
340 if (psmouse->pktcnt == 1) {
341 psmouse->last = jiffies;
342 goto out;
343 }
344
345 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
346 (psmouse->type == PSMOUSE_HGPK &&
347 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
348 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
349 serio_reconnect(serio);
350 goto out;
351 }
352 /*
353 * Not a new device, try processing first byte normally
354 */
355 psmouse->pktcnt = 1;
356 if (psmouse_handle_byte(psmouse))
357 goto out;
358
359 psmouse->packet[psmouse->pktcnt++] = data;
360 }
361
362 /*
363 * See if we need to force resync because mouse was idle for too long
364 */
365 if (psmouse->state == PSMOUSE_ACTIVATED &&
366 psmouse->pktcnt == 1 && psmouse->resync_time &&
367 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
368 psmouse->badbyte = psmouse->packet[0];
369 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
370 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
371 goto out;
372 }
373
374 psmouse->last = jiffies;
375 psmouse_handle_byte(psmouse);
376
377 out:
378 return IRQ_HANDLED;
379 }
380
381
382 /*
383 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
384 * using sliced syntax, understood by advanced devices, such as Logitech
385 * or Synaptics touchpads. The command is encoded as:
386 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
387 * is the command.
388 */
389 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
390 {
391 int i;
392
393 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
394 return -1;
395
396 for (i = 6; i >= 0; i -= 2) {
397 unsigned char d = (command >> i) & 3;
398 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
399 return -1;
400 }
401
402 return 0;
403 }
404
405
406 /*
407 * psmouse_reset() resets the mouse into power-on state.
408 */
409 int psmouse_reset(struct psmouse *psmouse)
410 {
411 unsigned char param[2];
412
413 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
414 return -1;
415
416 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
417 return -1;
418
419 return 0;
420 }
421
422 /*
423 * Here we set the mouse resolution.
424 */
425
426 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
427 {
428 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
429 unsigned char p;
430
431 if (resolution == 0 || resolution > 200)
432 resolution = 200;
433
434 p = params[resolution / 50];
435 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
436 psmouse->resolution = 25 << p;
437 }
438
439 /*
440 * Here we set the mouse report rate.
441 */
442
443 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
444 {
445 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
446 unsigned char r;
447 int i = 0;
448
449 while (rates[i] > rate) i++;
450 r = rates[i];
451 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
452 psmouse->rate = r;
453 }
454
455 /*
456 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
457 */
458
459 static int psmouse_poll(struct psmouse *psmouse)
460 {
461 return ps2_command(&psmouse->ps2dev, psmouse->packet,
462 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
463 }
464
465
466 /*
467 * Genius NetMouse magic init.
468 */
469 static int genius_detect(struct psmouse *psmouse, bool set_properties)
470 {
471 struct ps2dev *ps2dev = &psmouse->ps2dev;
472 unsigned char param[4];
473
474 param[0] = 3;
475 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
476 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
477 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
478 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
479 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
480
481 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
482 return -1;
483
484 if (set_properties) {
485 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
486 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
487 __set_bit(BTN_SIDE, psmouse->dev->keybit);
488 __set_bit(REL_WHEEL, psmouse->dev->relbit);
489
490 psmouse->vendor = "Genius";
491 psmouse->name = "Mouse";
492 psmouse->pktsize = 4;
493 }
494
495 return 0;
496 }
497
498 /*
499 * IntelliMouse magic init.
500 */
501 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
502 {
503 struct ps2dev *ps2dev = &psmouse->ps2dev;
504 unsigned char param[2];
505
506 param[0] = 200;
507 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
508 param[0] = 100;
509 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
510 param[0] = 80;
511 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
512 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
513
514 if (param[0] != 3)
515 return -1;
516
517 if (set_properties) {
518 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
519 __set_bit(REL_WHEEL, psmouse->dev->relbit);
520
521 if (!psmouse->vendor)
522 psmouse->vendor = "Generic";
523 if (!psmouse->name)
524 psmouse->name = "Wheel Mouse";
525 psmouse->pktsize = 4;
526 }
527
528 return 0;
529 }
530
531 /*
532 * Try IntelliMouse/Explorer magic init.
533 */
534 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
535 {
536 struct ps2dev *ps2dev = &psmouse->ps2dev;
537 unsigned char param[2];
538
539 intellimouse_detect(psmouse, 0);
540
541 param[0] = 200;
542 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
543 param[0] = 200;
544 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
545 param[0] = 80;
546 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
547 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
548
549 if (param[0] != 4)
550 return -1;
551
552 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
553 param[0] = 200;
554 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
555 param[0] = 80;
556 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
557 param[0] = 40;
558 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
559
560 if (set_properties) {
561 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
562 __set_bit(REL_WHEEL, psmouse->dev->relbit);
563 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
564 __set_bit(BTN_SIDE, psmouse->dev->keybit);
565 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
566
567 if (!psmouse->vendor)
568 psmouse->vendor = "Generic";
569 if (!psmouse->name)
570 psmouse->name = "Explorer Mouse";
571 psmouse->pktsize = 4;
572 }
573
574 return 0;
575 }
576
577 /*
578 * Kensington ThinkingMouse / ExpertMouse magic init.
579 */
580 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
581 {
582 struct ps2dev *ps2dev = &psmouse->ps2dev;
583 unsigned char param[2];
584 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
585 int i;
586
587 param[0] = 10;
588 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
589 param[0] = 0;
590 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
591 for (i = 0; i < ARRAY_SIZE(seq); i++) {
592 param[0] = seq[i];
593 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
594 }
595 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
596
597 if (param[0] != 2)
598 return -1;
599
600 if (set_properties) {
601 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
602 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
603
604 psmouse->vendor = "Kensington";
605 psmouse->name = "ThinkingMouse";
606 }
607
608 return 0;
609 }
610
611 /*
612 * Bare PS/2 protocol "detection". Always succeeds.
613 */
614 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
615 {
616 if (set_properties) {
617 if (!psmouse->vendor)
618 psmouse->vendor = "Generic";
619 if (!psmouse->name)
620 psmouse->name = "Mouse";
621
622 /*
623 * We have no way of figuring true number of buttons so let's
624 * assume that the device has 3.
625 */
626 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
627 }
628
629 return 0;
630 }
631
632 /*
633 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
634 * must be forced by sysfs protocol writing.
635 */
636 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
637 {
638 if (set_properties) {
639 psmouse->vendor = "Cortron";
640 psmouse->name = "PS/2 Trackball";
641
642 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
643 __set_bit(BTN_SIDE, psmouse->dev->keybit);
644 }
645
646 return 0;
647 }
648
649 /*
650 * Apply default settings to the psmouse structure. Most of them will
651 * be overridden by individual protocol initialization routines.
652 */
653
654 static void psmouse_apply_defaults(struct psmouse *psmouse)
655 {
656 struct input_dev *input_dev = psmouse->dev;
657
658 memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
659 memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
660 memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
661 memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
662 memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
663
664 __set_bit(EV_KEY, input_dev->evbit);
665 __set_bit(EV_REL, input_dev->evbit);
666
667 __set_bit(BTN_LEFT, input_dev->keybit);
668 __set_bit(BTN_RIGHT, input_dev->keybit);
669
670 __set_bit(REL_X, input_dev->relbit);
671 __set_bit(REL_Y, input_dev->relbit);
672
673 psmouse->set_rate = psmouse_set_rate;
674 psmouse->set_resolution = psmouse_set_resolution;
675 psmouse->poll = psmouse_poll;
676 psmouse->protocol_handler = psmouse_process_byte;
677 psmouse->pktsize = 3;
678 psmouse->reconnect = NULL;
679 psmouse->disconnect = NULL;
680 psmouse->cleanup = NULL;
681 psmouse->pt_activate = NULL;
682 psmouse->pt_deactivate = NULL;
683 }
684
685 /*
686 * Apply default settings to the psmouse structure and call specified
687 * protocol detection or initialization routine.
688 */
689 static int psmouse_do_detect(int (*detect)(struct psmouse *psmouse,
690 bool set_properties),
691 struct psmouse *psmouse, bool set_properties)
692 {
693 if (set_properties)
694 psmouse_apply_defaults(psmouse);
695
696 return detect(psmouse, set_properties);
697 }
698
699 /*
700 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
701 * the mouse may have.
702 */
703
704 static int psmouse_extensions(struct psmouse *psmouse,
705 unsigned int max_proto, bool set_properties)
706 {
707 bool synaptics_hardware = false;
708
709 /*
710 * We always check for lifebook because it does not disturb mouse
711 * (it only checks DMI information).
712 */
713 if (psmouse_do_detect(lifebook_detect, psmouse, set_properties) == 0) {
714 if (max_proto > PSMOUSE_IMEX) {
715 if (!set_properties || lifebook_init(psmouse) == 0)
716 return PSMOUSE_LIFEBOOK;
717 }
718 }
719
720 /*
721 * Try Kensington ThinkingMouse (we try first, because synaptics probe
722 * upsets the thinkingmouse).
723 */
724
725 if (max_proto > PSMOUSE_IMEX &&
726 psmouse_do_detect(thinking_detect, psmouse, set_properties) == 0) {
727 return PSMOUSE_THINKPS;
728 }
729
730 /*
731 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
732 * support is disabled in config - we need to know if it is synaptics so we
733 * can reset it properly after probing for intellimouse.
734 */
735 if (max_proto > PSMOUSE_PS2 &&
736 psmouse_do_detect(synaptics_detect, psmouse, set_properties) == 0) {
737 synaptics_hardware = true;
738
739 if (max_proto > PSMOUSE_IMEX) {
740 /*
741 * Try activating protocol, but check if support is enabled first, since
742 * we try detecting Synaptics even when protocol is disabled.
743 */
744 if (synaptics_supported() &&
745 (!set_properties || synaptics_init(psmouse) == 0)) {
746 return PSMOUSE_SYNAPTICS;
747 }
748
749 /*
750 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
751 * Unfortunately Logitech/Genius probes confuse some firmware versions so
752 * we'll have to skip them.
753 */
754 max_proto = PSMOUSE_IMEX;
755 }
756 /*
757 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
758 */
759 synaptics_reset(psmouse);
760 }
761
762 /*
763 * Try Cypress Trackpad.
764 * Must try it before Finger Sensing Pad because Finger Sensing Pad probe
765 * upsets some modules of Cypress Trackpads.
766 */
767 if (max_proto > PSMOUSE_IMEX &&
768 cypress_detect(psmouse, set_properties) == 0) {
769 if (cypress_supported()) {
770 if (cypress_init(psmouse) == 0)
771 return PSMOUSE_CYPRESS;
772
773 /*
774 * Finger Sensing Pad probe upsets some modules of
775 * Cypress Trackpad, must avoid Finger Sensing Pad
776 * probe if Cypress Trackpad device detected.
777 */
778 return PSMOUSE_PS2;
779 }
780
781 max_proto = PSMOUSE_IMEX;
782 }
783
784 /*
785 * Try ALPS TouchPad
786 */
787 if (max_proto > PSMOUSE_IMEX) {
788 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
789 if (psmouse_do_detect(alps_detect,
790 psmouse, set_properties) == 0) {
791 if (!set_properties || alps_init(psmouse) == 0)
792 return PSMOUSE_ALPS;
793 /*
794 * Init failed, try basic relative protocols
795 */
796 max_proto = PSMOUSE_IMEX;
797 }
798 }
799
800 /*
801 * Try OLPC HGPK touchpad.
802 */
803 if (max_proto > PSMOUSE_IMEX &&
804 psmouse_do_detect(hgpk_detect, psmouse, set_properties) == 0) {
805 if (!set_properties || hgpk_init(psmouse) == 0)
806 return PSMOUSE_HGPK;
807 /*
808 * Init failed, try basic relative protocols
809 */
810 max_proto = PSMOUSE_IMEX;
811 }
812
813 /*
814 * Try Elantech touchpad.
815 */
816 if (max_proto > PSMOUSE_IMEX &&
817 psmouse_do_detect(elantech_detect, psmouse, set_properties) == 0) {
818 if (!set_properties || elantech_init(psmouse) == 0)
819 return PSMOUSE_ELANTECH;
820 /*
821 * Init failed, try basic relative protocols
822 */
823 max_proto = PSMOUSE_IMEX;
824 }
825
826 if (max_proto > PSMOUSE_IMEX) {
827 if (psmouse_do_detect(genius_detect,
828 psmouse, set_properties) == 0)
829 return PSMOUSE_GENPS;
830
831 if (psmouse_do_detect(ps2pp_init,
832 psmouse, set_properties) == 0)
833 return PSMOUSE_PS2PP;
834
835 if (psmouse_do_detect(trackpoint_detect,
836 psmouse, set_properties) == 0)
837 return PSMOUSE_TRACKPOINT;
838
839 if (psmouse_do_detect(touchkit_ps2_detect,
840 psmouse, set_properties) == 0)
841 return PSMOUSE_TOUCHKIT_PS2;
842 }
843
844 /*
845 * Try Finger Sensing Pad. We do it here because its probe upsets
846 * Trackpoint devices (causing TP_READ_ID command to time out).
847 */
848 if (max_proto > PSMOUSE_IMEX) {
849 if (psmouse_do_detect(fsp_detect,
850 psmouse, set_properties) == 0) {
851 if (!set_properties || fsp_init(psmouse) == 0)
852 return PSMOUSE_FSP;
853 /*
854 * Init failed, try basic relative protocols
855 */
856 max_proto = PSMOUSE_IMEX;
857 }
858 }
859
860 /*
861 * Reset to defaults in case the device got confused by extended
862 * protocol probes. Note that we follow up with full reset because
863 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
864 */
865 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
866 psmouse_reset(psmouse);
867
868 if (max_proto >= PSMOUSE_IMEX &&
869 psmouse_do_detect(im_explorer_detect,
870 psmouse, set_properties) == 0) {
871 return PSMOUSE_IMEX;
872 }
873
874 if (max_proto >= PSMOUSE_IMPS &&
875 psmouse_do_detect(intellimouse_detect,
876 psmouse, set_properties) == 0) {
877 return PSMOUSE_IMPS;
878 }
879
880 /*
881 * Okay, all failed, we have a standard mouse here. The number of the buttons
882 * is still a question, though. We assume 3.
883 */
884 psmouse_do_detect(ps2bare_detect, psmouse, set_properties);
885
886 if (synaptics_hardware) {
887 /*
888 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
889 * We need to reset the touchpad because if there is a track point on the
890 * pass through port it could get disabled while probing for protocol
891 * extensions.
892 */
893 psmouse_reset(psmouse);
894 }
895
896 return PSMOUSE_PS2;
897 }
898
899 static const struct psmouse_protocol psmouse_protocols[] = {
900 {
901 .type = PSMOUSE_PS2,
902 .name = "PS/2",
903 .alias = "bare",
904 .maxproto = true,
905 .ignore_parity = true,
906 .detect = ps2bare_detect,
907 },
908 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
909 {
910 .type = PSMOUSE_PS2PP,
911 .name = "PS2++",
912 .alias = "logitech",
913 .detect = ps2pp_init,
914 },
915 #endif
916 {
917 .type = PSMOUSE_THINKPS,
918 .name = "ThinkPS/2",
919 .alias = "thinkps",
920 .detect = thinking_detect,
921 },
922 #ifdef CONFIG_MOUSE_PS2_CYPRESS
923 {
924 .type = PSMOUSE_CYPRESS,
925 .name = "CyPS/2",
926 .alias = "cypress",
927 .detect = cypress_detect,
928 .init = cypress_init,
929 },
930 #endif
931 {
932 .type = PSMOUSE_GENPS,
933 .name = "GenPS/2",
934 .alias = "genius",
935 .detect = genius_detect,
936 },
937 {
938 .type = PSMOUSE_IMPS,
939 .name = "ImPS/2",
940 .alias = "imps",
941 .maxproto = true,
942 .ignore_parity = true,
943 .detect = intellimouse_detect,
944 },
945 {
946 .type = PSMOUSE_IMEX,
947 .name = "ImExPS/2",
948 .alias = "exps",
949 .maxproto = true,
950 .ignore_parity = true,
951 .detect = im_explorer_detect,
952 },
953 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
954 {
955 .type = PSMOUSE_SYNAPTICS,
956 .name = "SynPS/2",
957 .alias = "synaptics",
958 .detect = synaptics_detect,
959 .init = synaptics_init,
960 },
961 {
962 .type = PSMOUSE_SYNAPTICS_RELATIVE,
963 .name = "SynRelPS/2",
964 .alias = "synaptics-relative",
965 .detect = synaptics_detect,
966 .init = synaptics_init_relative,
967 },
968 #endif
969 #ifdef CONFIG_MOUSE_PS2_ALPS
970 {
971 .type = PSMOUSE_ALPS,
972 .name = "AlpsPS/2",
973 .alias = "alps",
974 .detect = alps_detect,
975 .init = alps_init,
976 },
977 #endif
978 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
979 {
980 .type = PSMOUSE_LIFEBOOK,
981 .name = "LBPS/2",
982 .alias = "lifebook",
983 .init = lifebook_init,
984 },
985 #endif
986 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
987 {
988 .type = PSMOUSE_TRACKPOINT,
989 .name = "TPPS/2",
990 .alias = "trackpoint",
991 .detect = trackpoint_detect,
992 },
993 #endif
994 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
995 {
996 .type = PSMOUSE_TOUCHKIT_PS2,
997 .name = "touchkitPS/2",
998 .alias = "touchkit",
999 .detect = touchkit_ps2_detect,
1000 },
1001 #endif
1002 #ifdef CONFIG_MOUSE_PS2_OLPC
1003 {
1004 .type = PSMOUSE_HGPK,
1005 .name = "OLPC HGPK",
1006 .alias = "hgpk",
1007 .detect = hgpk_detect,
1008 },
1009 #endif
1010 #ifdef CONFIG_MOUSE_PS2_ELANTECH
1011 {
1012 .type = PSMOUSE_ELANTECH,
1013 .name = "ETPS/2",
1014 .alias = "elantech",
1015 .detect = elantech_detect,
1016 .init = elantech_init,
1017 },
1018 #endif
1019 #ifdef CONFIG_MOUSE_PS2_SENTELIC
1020 {
1021 .type = PSMOUSE_FSP,
1022 .name = "FSPPS/2",
1023 .alias = "fsp",
1024 .detect = fsp_detect,
1025 .init = fsp_init,
1026 },
1027 #endif
1028 {
1029 .type = PSMOUSE_CORTRON,
1030 .name = "CortronPS/2",
1031 .alias = "cortps",
1032 .detect = cortron_detect,
1033 },
1034 {
1035 .type = PSMOUSE_AUTO,
1036 .name = "auto",
1037 .alias = "any",
1038 .maxproto = true,
1039 },
1040 };
1041
1042 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
1043 {
1044 int i;
1045
1046 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
1047 if (psmouse_protocols[i].type == type)
1048 return &psmouse_protocols[i];
1049
1050 WARN_ON(1);
1051 return &psmouse_protocols[0];
1052 }
1053
1054 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
1055 {
1056 const struct psmouse_protocol *p;
1057 int i;
1058
1059 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
1060 p = &psmouse_protocols[i];
1061
1062 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
1063 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
1064 return &psmouse_protocols[i];
1065 }
1066
1067 return NULL;
1068 }
1069
1070
1071 /*
1072 * psmouse_probe() probes for a PS/2 mouse.
1073 */
1074
1075 static int psmouse_probe(struct psmouse *psmouse)
1076 {
1077 struct ps2dev *ps2dev = &psmouse->ps2dev;
1078 unsigned char param[2];
1079
1080 /*
1081 * First, we check if it's a mouse. It should send 0x00 or 0x03
1082 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1083 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
1084 * ID queries, probably due to a firmware bug.
1085 */
1086
1087 param[0] = 0xa5;
1088 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1089 return -1;
1090
1091 if (param[0] != 0x00 && param[0] != 0x03 &&
1092 param[0] != 0x04 && param[0] != 0xff)
1093 return -1;
1094
1095 /*
1096 * Then we reset and disable the mouse so that it doesn't generate events.
1097 */
1098
1099 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
1100 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
1101 ps2dev->serio->phys);
1102
1103 return 0;
1104 }
1105
1106 /*
1107 * psmouse_initialize() initializes the mouse to a sane state.
1108 */
1109
1110 static void psmouse_initialize(struct psmouse *psmouse)
1111 {
1112 /*
1113 * We set the mouse report rate, resolution and scaling.
1114 */
1115
1116 if (psmouse_max_proto != PSMOUSE_PS2) {
1117 psmouse->set_rate(psmouse, psmouse->rate);
1118 psmouse->set_resolution(psmouse, psmouse->resolution);
1119 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
1120 }
1121 }
1122
1123 /*
1124 * psmouse_activate() enables the mouse so that we get motion reports from it.
1125 */
1126
1127 int psmouse_activate(struct psmouse *psmouse)
1128 {
1129 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1130 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1131 psmouse->ps2dev.serio->phys);
1132 return -1;
1133 }
1134
1135 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1136 return 0;
1137 }
1138
1139 /*
1140 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
1141 * reports from it unless we explicitly request it.
1142 */
1143
1144 int psmouse_deactivate(struct psmouse *psmouse)
1145 {
1146 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
1147 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1148 psmouse->ps2dev.serio->phys);
1149 return -1;
1150 }
1151
1152 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1153 return 0;
1154 }
1155
1156
1157 /*
1158 * psmouse_resync() attempts to re-validate current protocol.
1159 */
1160
1161 static void psmouse_resync(struct work_struct *work)
1162 {
1163 struct psmouse *parent = NULL, *psmouse =
1164 container_of(work, struct psmouse, resync_work.work);
1165 struct serio *serio = psmouse->ps2dev.serio;
1166 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1167 bool failed = false, enabled = false;
1168 int i;
1169
1170 mutex_lock(&psmouse_mutex);
1171
1172 if (psmouse->state != PSMOUSE_RESYNCING)
1173 goto out;
1174
1175 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1176 parent = serio_get_drvdata(serio->parent);
1177 psmouse_deactivate(parent);
1178 }
1179
1180 /*
1181 * Some mice don't ACK commands sent while they are in the middle of
1182 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1183 * instead of ps2_command() which would wait for 200ms for an ACK
1184 * that may never come.
1185 * As an additional quirk ALPS touchpads may not only forget to ACK
1186 * disable command but will stop reporting taps, so if we see that
1187 * mouse at least once ACKs disable we will do full reconnect if ACK
1188 * is missing.
1189 */
1190 psmouse->num_resyncs++;
1191
1192 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1193 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1194 failed = true;
1195 } else
1196 psmouse->acks_disable_command = true;
1197
1198 /*
1199 * Poll the mouse. If it was reset the packet will be shorter than
1200 * psmouse->pktsize and ps2_command will fail. We do not expect and
1201 * do not handle scenario when mouse "upgrades" its protocol while
1202 * disconnected since it would require additional delay. If we ever
1203 * see a mouse that does it we'll adjust the code.
1204 */
1205 if (!failed) {
1206 if (psmouse->poll(psmouse))
1207 failed = true;
1208 else {
1209 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1210 for (i = 0; i < psmouse->pktsize; i++) {
1211 psmouse->pktcnt++;
1212 rc = psmouse->protocol_handler(psmouse);
1213 if (rc != PSMOUSE_GOOD_DATA)
1214 break;
1215 }
1216 if (rc != PSMOUSE_FULL_PACKET)
1217 failed = true;
1218 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1219 }
1220 }
1221 /*
1222 * Now try to enable mouse. We try to do that even if poll failed and also
1223 * repeat our attempts 5 times, otherwise we may be left out with disabled
1224 * mouse.
1225 */
1226 for (i = 0; i < 5; i++) {
1227 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1228 enabled = true;
1229 break;
1230 }
1231 msleep(200);
1232 }
1233
1234 if (!enabled) {
1235 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1236 psmouse->ps2dev.serio->phys);
1237 failed = true;
1238 }
1239
1240 if (failed) {
1241 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1242 psmouse_info(psmouse,
1243 "resync failed, issuing reconnect request\n");
1244 serio_reconnect(serio);
1245 } else
1246 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1247
1248 if (parent)
1249 psmouse_activate(parent);
1250 out:
1251 mutex_unlock(&psmouse_mutex);
1252 }
1253
1254 /*
1255 * psmouse_cleanup() resets the mouse into power-on state.
1256 */
1257
1258 static void psmouse_cleanup(struct serio *serio)
1259 {
1260 struct psmouse *psmouse = serio_get_drvdata(serio);
1261 struct psmouse *parent = NULL;
1262
1263 mutex_lock(&psmouse_mutex);
1264
1265 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1266 parent = serio_get_drvdata(serio->parent);
1267 psmouse_deactivate(parent);
1268 }
1269
1270 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1271
1272 /*
1273 * Disable stream mode so cleanup routine can proceed undisturbed.
1274 */
1275 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1276 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1277 psmouse->ps2dev.serio->phys);
1278
1279 if (psmouse->cleanup)
1280 psmouse->cleanup(psmouse);
1281
1282 /*
1283 * Reset the mouse to defaults (bare PS/2 protocol).
1284 */
1285 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1286
1287 /*
1288 * Some boxes, such as HP nx7400, get terribly confused if mouse
1289 * is not fully enabled before suspending/shutting down.
1290 */
1291 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1292
1293 if (parent) {
1294 if (parent->pt_deactivate)
1295 parent->pt_deactivate(parent);
1296
1297 psmouse_activate(parent);
1298 }
1299
1300 mutex_unlock(&psmouse_mutex);
1301 }
1302
1303 /*
1304 * psmouse_disconnect() closes and frees.
1305 */
1306
1307 static void psmouse_disconnect(struct serio *serio)
1308 {
1309 struct psmouse *psmouse, *parent = NULL;
1310
1311 psmouse = serio_get_drvdata(serio);
1312
1313 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1314
1315 mutex_lock(&psmouse_mutex);
1316
1317 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1318
1319 /* make sure we don't have a resync in progress */
1320 mutex_unlock(&psmouse_mutex);
1321 flush_workqueue(kpsmoused_wq);
1322 mutex_lock(&psmouse_mutex);
1323
1324 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1325 parent = serio_get_drvdata(serio->parent);
1326 psmouse_deactivate(parent);
1327 }
1328
1329 if (psmouse->disconnect)
1330 psmouse->disconnect(psmouse);
1331
1332 if (parent && parent->pt_deactivate)
1333 parent->pt_deactivate(parent);
1334
1335 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1336
1337 serio_close(serio);
1338 serio_set_drvdata(serio, NULL);
1339 input_unregister_device(psmouse->dev);
1340 kfree(psmouse);
1341
1342 if (parent)
1343 psmouse_activate(parent);
1344
1345 mutex_unlock(&psmouse_mutex);
1346 }
1347
1348 static int psmouse_switch_protocol(struct psmouse *psmouse,
1349 const struct psmouse_protocol *proto)
1350 {
1351 const struct psmouse_protocol *selected_proto;
1352 struct input_dev *input_dev = psmouse->dev;
1353
1354 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1355
1356 if (proto && (proto->detect || proto->init)) {
1357 psmouse_apply_defaults(psmouse);
1358
1359 if (proto->detect && proto->detect(psmouse, true) < 0)
1360 return -1;
1361
1362 if (proto->init && proto->init(psmouse) < 0)
1363 return -1;
1364
1365 psmouse->type = proto->type;
1366 selected_proto = proto;
1367 } else {
1368 psmouse->type = psmouse_extensions(psmouse,
1369 psmouse_max_proto, true);
1370 selected_proto = psmouse_protocol_by_type(psmouse->type);
1371 }
1372
1373 psmouse->ignore_parity = selected_proto->ignore_parity;
1374
1375 /*
1376 * If mouse's packet size is 3 there is no point in polling the
1377 * device in hopes to detect protocol reset - we won't get less
1378 * than 3 bytes response anyhow.
1379 */
1380 if (psmouse->pktsize == 3)
1381 psmouse->resync_time = 0;
1382
1383 /*
1384 * Some smart KVMs fake response to POLL command returning just
1385 * 3 bytes and messing up our resync logic, so if initial poll
1386 * fails we won't try polling the device anymore. Hopefully
1387 * such KVM will maintain initially selected protocol.
1388 */
1389 if (psmouse->resync_time && psmouse->poll(psmouse))
1390 psmouse->resync_time = 0;
1391
1392 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1393 selected_proto->name, psmouse->vendor, psmouse->name);
1394
1395 input_dev->name = psmouse->devname;
1396 input_dev->phys = psmouse->phys;
1397 input_dev->id.bustype = BUS_I8042;
1398 input_dev->id.vendor = 0x0002;
1399 input_dev->id.product = psmouse->type;
1400 input_dev->id.version = psmouse->model;
1401
1402 return 0;
1403 }
1404
1405 /*
1406 * psmouse_connect() is a callback from the serio module when
1407 * an unhandled serio port is found.
1408 */
1409 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1410 {
1411 struct psmouse *psmouse, *parent = NULL;
1412 struct input_dev *input_dev;
1413 int retval = 0, error = -ENOMEM;
1414
1415 mutex_lock(&psmouse_mutex);
1416
1417 /*
1418 * If this is a pass-through port deactivate parent so the device
1419 * connected to this port can be successfully identified
1420 */
1421 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1422 parent = serio_get_drvdata(serio->parent);
1423 psmouse_deactivate(parent);
1424 }
1425
1426 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1427 input_dev = input_allocate_device();
1428 if (!psmouse || !input_dev)
1429 goto err_free;
1430
1431 ps2_init(&psmouse->ps2dev, serio);
1432 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1433 psmouse->dev = input_dev;
1434 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1435
1436 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1437
1438 serio_set_drvdata(serio, psmouse);
1439
1440 error = serio_open(serio, drv);
1441 if (error)
1442 goto err_clear_drvdata;
1443
1444 if (psmouse_probe(psmouse) < 0) {
1445 error = -ENODEV;
1446 goto err_close_serio;
1447 }
1448
1449 psmouse->rate = psmouse_rate;
1450 psmouse->resolution = psmouse_resolution;
1451 psmouse->resetafter = psmouse_resetafter;
1452 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1453 psmouse->smartscroll = psmouse_smartscroll;
1454
1455 psmouse_switch_protocol(psmouse, NULL);
1456
1457 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1458 psmouse_initialize(psmouse);
1459
1460 error = input_register_device(psmouse->dev);
1461 if (error)
1462 goto err_protocol_disconnect;
1463
1464 if (parent && parent->pt_activate)
1465 parent->pt_activate(parent);
1466
1467 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1468 if (error)
1469 goto err_pt_deactivate;
1470
1471 psmouse_activate(psmouse);
1472
1473 out:
1474 /* If this is a pass-through port the parent needs to be re-activated */
1475 if (parent)
1476 psmouse_activate(parent);
1477
1478 mutex_unlock(&psmouse_mutex);
1479 return retval;
1480
1481 err_pt_deactivate:
1482 if (parent && parent->pt_deactivate)
1483 parent->pt_deactivate(parent);
1484 input_unregister_device(psmouse->dev);
1485 input_dev = NULL; /* so we don't try to free it below */
1486 err_protocol_disconnect:
1487 if (psmouse->disconnect)
1488 psmouse->disconnect(psmouse);
1489 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1490 err_close_serio:
1491 serio_close(serio);
1492 err_clear_drvdata:
1493 serio_set_drvdata(serio, NULL);
1494 err_free:
1495 input_free_device(input_dev);
1496 kfree(psmouse);
1497
1498 retval = error;
1499 goto out;
1500 }
1501
1502
1503 static int psmouse_reconnect(struct serio *serio)
1504 {
1505 struct psmouse *psmouse = serio_get_drvdata(serio);
1506 struct psmouse *parent = NULL;
1507 struct serio_driver *drv = serio->drv;
1508 unsigned char type;
1509 int rc = -1;
1510
1511 if (!drv || !psmouse) {
1512 psmouse_dbg(psmouse,
1513 "reconnect request, but serio is disconnected, ignoring...\n");
1514 return -1;
1515 }
1516
1517 mutex_lock(&psmouse_mutex);
1518
1519 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1520 parent = serio_get_drvdata(serio->parent);
1521 psmouse_deactivate(parent);
1522 }
1523
1524 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1525
1526 if (psmouse->reconnect) {
1527 if (psmouse->reconnect(psmouse))
1528 goto out;
1529 } else {
1530 psmouse_reset(psmouse);
1531
1532 if (psmouse_probe(psmouse) < 0)
1533 goto out;
1534
1535 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1536 if (psmouse->type != type)
1537 goto out;
1538 }
1539
1540 /*
1541 * OK, the device type (and capabilities) match the old one,
1542 * we can continue using it, complete initialization
1543 */
1544 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1545
1546 psmouse_initialize(psmouse);
1547
1548 if (parent && parent->pt_activate)
1549 parent->pt_activate(parent);
1550
1551 psmouse_activate(psmouse);
1552 rc = 0;
1553
1554 out:
1555 /* If this is a pass-through port the parent waits to be activated */
1556 if (parent)
1557 psmouse_activate(parent);
1558
1559 mutex_unlock(&psmouse_mutex);
1560 return rc;
1561 }
1562
1563 static struct serio_device_id psmouse_serio_ids[] = {
1564 {
1565 .type = SERIO_8042,
1566 .proto = SERIO_ANY,
1567 .id = SERIO_ANY,
1568 .extra = SERIO_ANY,
1569 },
1570 {
1571 .type = SERIO_PS_PSTHRU,
1572 .proto = SERIO_ANY,
1573 .id = SERIO_ANY,
1574 .extra = SERIO_ANY,
1575 },
1576 { 0 }
1577 };
1578
1579 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1580
1581 static struct serio_driver psmouse_drv = {
1582 .driver = {
1583 .name = "psmouse",
1584 },
1585 .description = DRIVER_DESC,
1586 .id_table = psmouse_serio_ids,
1587 .interrupt = psmouse_interrupt,
1588 .connect = psmouse_connect,
1589 .reconnect = psmouse_reconnect,
1590 .disconnect = psmouse_disconnect,
1591 .cleanup = psmouse_cleanup,
1592 };
1593
1594 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1595 char *buf)
1596 {
1597 struct serio *serio = to_serio_port(dev);
1598 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1599 struct psmouse *psmouse;
1600
1601 psmouse = serio_get_drvdata(serio);
1602
1603 return attr->show(psmouse, attr->data, buf);
1604 }
1605
1606 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1607 const char *buf, size_t count)
1608 {
1609 struct serio *serio = to_serio_port(dev);
1610 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1611 struct psmouse *psmouse, *parent = NULL;
1612 int retval;
1613
1614 retval = mutex_lock_interruptible(&psmouse_mutex);
1615 if (retval)
1616 goto out;
1617
1618 psmouse = serio_get_drvdata(serio);
1619
1620 if (attr->protect) {
1621 if (psmouse->state == PSMOUSE_IGNORE) {
1622 retval = -ENODEV;
1623 goto out_unlock;
1624 }
1625
1626 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1627 parent = serio_get_drvdata(serio->parent);
1628 psmouse_deactivate(parent);
1629 }
1630
1631 psmouse_deactivate(psmouse);
1632 }
1633
1634 retval = attr->set(psmouse, attr->data, buf, count);
1635
1636 if (attr->protect) {
1637 if (retval != -ENODEV)
1638 psmouse_activate(psmouse);
1639
1640 if (parent)
1641 psmouse_activate(parent);
1642 }
1643
1644 out_unlock:
1645 mutex_unlock(&psmouse_mutex);
1646 out:
1647 return retval;
1648 }
1649
1650 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1651 {
1652 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1653
1654 return sprintf(buf, "%u\n", *field);
1655 }
1656
1657 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1658 {
1659 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1660 unsigned int value;
1661 int err;
1662
1663 err = kstrtouint(buf, 10, &value);
1664 if (err)
1665 return err;
1666
1667 *field = value;
1668
1669 return count;
1670 }
1671
1672 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1673 {
1674 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1675 }
1676
1677 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1678 {
1679 struct serio *serio = psmouse->ps2dev.serio;
1680 struct psmouse *parent = NULL;
1681 struct input_dev *old_dev, *new_dev;
1682 const struct psmouse_protocol *proto, *old_proto;
1683 int error;
1684 int retry = 0;
1685
1686 proto = psmouse_protocol_by_name(buf, count);
1687 if (!proto)
1688 return -EINVAL;
1689
1690 if (psmouse->type == proto->type)
1691 return count;
1692
1693 new_dev = input_allocate_device();
1694 if (!new_dev)
1695 return -ENOMEM;
1696
1697 while (!list_empty(&serio->children)) {
1698 if (++retry > 3) {
1699 psmouse_warn(psmouse,
1700 "failed to destroy children ports, protocol change aborted.\n");
1701 input_free_device(new_dev);
1702 return -EIO;
1703 }
1704
1705 mutex_unlock(&psmouse_mutex);
1706 serio_unregister_child_port(serio);
1707 mutex_lock(&psmouse_mutex);
1708
1709 if (serio->drv != &psmouse_drv) {
1710 input_free_device(new_dev);
1711 return -ENODEV;
1712 }
1713
1714 if (psmouse->type == proto->type) {
1715 input_free_device(new_dev);
1716 return count; /* switched by other thread */
1717 }
1718 }
1719
1720 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1721 parent = serio_get_drvdata(serio->parent);
1722 if (parent->pt_deactivate)
1723 parent->pt_deactivate(parent);
1724 }
1725
1726 old_dev = psmouse->dev;
1727 old_proto = psmouse_protocol_by_type(psmouse->type);
1728
1729 if (psmouse->disconnect)
1730 psmouse->disconnect(psmouse);
1731
1732 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1733
1734 psmouse->dev = new_dev;
1735 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1736
1737 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1738 psmouse_reset(psmouse);
1739 /* default to PSMOUSE_PS2 */
1740 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1741 }
1742
1743 psmouse_initialize(psmouse);
1744 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1745
1746 error = input_register_device(psmouse->dev);
1747 if (error) {
1748 if (psmouse->disconnect)
1749 psmouse->disconnect(psmouse);
1750
1751 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1752 input_free_device(new_dev);
1753 psmouse->dev = old_dev;
1754 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1755 psmouse_switch_protocol(psmouse, old_proto);
1756 psmouse_initialize(psmouse);
1757 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1758
1759 return error;
1760 }
1761
1762 input_unregister_device(old_dev);
1763
1764 if (parent && parent->pt_activate)
1765 parent->pt_activate(parent);
1766
1767 return count;
1768 }
1769
1770 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1771 {
1772 unsigned int value;
1773 int err;
1774
1775 err = kstrtouint(buf, 10, &value);
1776 if (err)
1777 return err;
1778
1779 psmouse->set_rate(psmouse, value);
1780 return count;
1781 }
1782
1783 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1784 {
1785 unsigned int value;
1786 int err;
1787
1788 err = kstrtouint(buf, 10, &value);
1789 if (err)
1790 return err;
1791
1792 psmouse->set_resolution(psmouse, value);
1793 return count;
1794 }
1795
1796
1797 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1798 {
1799 const struct psmouse_protocol *proto;
1800
1801 if (!val)
1802 return -EINVAL;
1803
1804 proto = psmouse_protocol_by_name(val, strlen(val));
1805
1806 if (!proto || !proto->maxproto)
1807 return -EINVAL;
1808
1809 *((unsigned int *)kp->arg) = proto->type;
1810
1811 return 0;
1812 }
1813
1814 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1815 {
1816 int type = *((unsigned int *)kp->arg);
1817
1818 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
1819 }
1820
1821 static int __init psmouse_init(void)
1822 {
1823 int err;
1824
1825 lifebook_module_init();
1826 synaptics_module_init();
1827 hgpk_module_init();
1828
1829 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1830 if (!kpsmoused_wq) {
1831 pr_err("failed to create kpsmoused workqueue\n");
1832 return -ENOMEM;
1833 }
1834
1835 err = serio_register_driver(&psmouse_drv);
1836 if (err)
1837 destroy_workqueue(kpsmoused_wq);
1838
1839 return err;
1840 }
1841
1842 static void __exit psmouse_exit(void)
1843 {
1844 serio_unregister_driver(&psmouse_drv);
1845 destroy_workqueue(kpsmoused_wq);
1846 }
1847
1848 module_init(psmouse_init);
1849 module_exit(psmouse_exit);
Linux with added FPC-III support