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Merge tag 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux...
[deliverable/linux.git] / drivers / input / mouse / psmouse-base.c
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 #include "focaltech.h"
39
40 #define DRIVER_DESC "PS/2 mouse driver"
41
42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
43 MODULE_DESCRIPTION(DRIVER_DESC);
44 MODULE_LICENSE("GPL");
45
46 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
47 static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
48 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
49 static struct kernel_param_ops param_ops_proto_abbrev = {
50 .set = psmouse_set_maxproto,
51 .get = psmouse_get_maxproto,
52 };
53 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
54 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
55 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
56
57 static unsigned int psmouse_resolution = 200;
58 module_param_named(resolution, psmouse_resolution, uint, 0644);
59 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
60
61 static unsigned int psmouse_rate = 100;
62 module_param_named(rate, psmouse_rate, uint, 0644);
63 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
64
65 static bool psmouse_smartscroll = 1;
66 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
67 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
68
69 static unsigned int psmouse_resetafter = 5;
70 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
71 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
72
73 static unsigned int psmouse_resync_time;
74 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
75 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
76
77 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
78 NULL,
79 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
80 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
81 (void *) offsetof(struct psmouse, rate),
82 psmouse_show_int_attr, psmouse_attr_set_rate);
83 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
84 (void *) offsetof(struct psmouse, resolution),
85 psmouse_show_int_attr, psmouse_attr_set_resolution);
86 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
87 (void *) offsetof(struct psmouse, resetafter),
88 psmouse_show_int_attr, psmouse_set_int_attr);
89 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
90 (void *) offsetof(struct psmouse, resync_time),
91 psmouse_show_int_attr, psmouse_set_int_attr);
92
93 static struct attribute *psmouse_attributes[] = {
94 &psmouse_attr_protocol.dattr.attr,
95 &psmouse_attr_rate.dattr.attr,
96 &psmouse_attr_resolution.dattr.attr,
97 &psmouse_attr_resetafter.dattr.attr,
98 &psmouse_attr_resync_time.dattr.attr,
99 NULL
100 };
101
102 static struct attribute_group psmouse_attribute_group = {
103 .attrs = psmouse_attributes,
104 };
105
106 /*
107 * psmouse_mutex protects all operations changing state of mouse
108 * (connecting, disconnecting, changing rate or resolution via
109 * sysfs). We could use a per-device semaphore but since there
110 * rarely more than one PS/2 mouse connected and since semaphore
111 * is taken in "slow" paths it is not worth it.
112 */
113 static DEFINE_MUTEX(psmouse_mutex);
114
115 static struct workqueue_struct *kpsmoused_wq;
116
117 struct psmouse_protocol {
118 enum psmouse_type type;
119 bool maxproto;
120 bool ignore_parity; /* Protocol should ignore parity errors from KBC */
121 const char *name;
122 const char *alias;
123 int (*detect)(struct psmouse *, bool);
124 int (*init)(struct psmouse *);
125 };
126
127 /*
128 * psmouse_process_byte() analyzes the PS/2 data stream and reports
129 * relevant events to the input module once full packet has arrived.
130 */
131
132 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
133 {
134 struct input_dev *dev = psmouse->dev;
135 unsigned char *packet = psmouse->packet;
136
137 if (psmouse->pktcnt < psmouse->pktsize)
138 return PSMOUSE_GOOD_DATA;
139
140 /*
141 * Full packet accumulated, process it
142 */
143
144 /*
145 * Scroll wheel on IntelliMice, scroll buttons on NetMice
146 */
147
148 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
149 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
150
151 /*
152 * Scroll wheel and buttons on IntelliMouse Explorer
153 */
154
155 if (psmouse->type == PSMOUSE_IMEX) {
156 switch (packet[3] & 0xC0) {
157 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
158 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
159 break;
160 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
161 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
162 break;
163 case 0x00:
164 case 0xC0:
165 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
166 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
167 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
168 break;
169 }
170 }
171
172 /*
173 * Extra buttons on Genius NewNet 3D
174 */
175
176 if (psmouse->type == PSMOUSE_GENPS) {
177 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
178 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
179 }
180
181 /*
182 * Extra button on ThinkingMouse
183 */
184 if (psmouse->type == PSMOUSE_THINKPS) {
185 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
186 /* Without this bit of weirdness moving up gives wildly high Y changes. */
187 packet[1] |= (packet[0] & 0x40) << 1;
188 }
189
190 /*
191 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
192 * byte.
193 */
194 if (psmouse->type == PSMOUSE_CORTRON) {
195 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
196 packet[0] |= 0x08;
197 }
198
199 /*
200 * Generic PS/2 Mouse
201 */
202
203 input_report_key(dev, BTN_LEFT, packet[0] & 1);
204 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
205 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
206
207 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
208 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
209
210 input_sync(dev);
211
212 return PSMOUSE_FULL_PACKET;
213 }
214
215 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
216 unsigned long delay)
217 {
218 queue_delayed_work(kpsmoused_wq, work, delay);
219 }
220
221 /*
222 * __psmouse_set_state() sets new psmouse state and resets all flags.
223 */
224
225 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
226 {
227 psmouse->state = new_state;
228 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
229 psmouse->ps2dev.flags = 0;
230 psmouse->last = jiffies;
231 }
232
233
234 /*
235 * psmouse_set_state() sets new psmouse state and resets all flags and
236 * counters while holding serio lock so fighting with interrupt handler
237 * is not a concern.
238 */
239
240 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
241 {
242 serio_pause_rx(psmouse->ps2dev.serio);
243 __psmouse_set_state(psmouse, new_state);
244 serio_continue_rx(psmouse->ps2dev.serio);
245 }
246
247 /*
248 * psmouse_handle_byte() processes one byte of the input data stream
249 * by calling corresponding protocol handler.
250 */
251
252 static int psmouse_handle_byte(struct psmouse *psmouse)
253 {
254 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
255
256 switch (rc) {
257 case PSMOUSE_BAD_DATA:
258 if (psmouse->state == PSMOUSE_ACTIVATED) {
259 psmouse_warn(psmouse,
260 "%s at %s lost sync at byte %d\n",
261 psmouse->name, psmouse->phys,
262 psmouse->pktcnt);
263 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
264 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
265 psmouse_notice(psmouse,
266 "issuing reconnect request\n");
267 serio_reconnect(psmouse->ps2dev.serio);
268 return -1;
269 }
270 }
271 psmouse->pktcnt = 0;
272 break;
273
274 case PSMOUSE_FULL_PACKET:
275 psmouse->pktcnt = 0;
276 if (psmouse->out_of_sync_cnt) {
277 psmouse->out_of_sync_cnt = 0;
278 psmouse_notice(psmouse,
279 "%s at %s - driver resynced.\n",
280 psmouse->name, psmouse->phys);
281 }
282 break;
283
284 case PSMOUSE_GOOD_DATA:
285 break;
286 }
287 return 0;
288 }
289
290 /*
291 * psmouse_interrupt() handles incoming characters, either passing them
292 * for normal processing or gathering them as command response.
293 */
294
295 static irqreturn_t psmouse_interrupt(struct serio *serio,
296 unsigned char data, unsigned int flags)
297 {
298 struct psmouse *psmouse = serio_get_drvdata(serio);
299
300 if (psmouse->state == PSMOUSE_IGNORE)
301 goto out;
302
303 if (unlikely((flags & SERIO_TIMEOUT) ||
304 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
305
306 if (psmouse->state == PSMOUSE_ACTIVATED)
307 psmouse_warn(psmouse,
308 "bad data from KBC -%s%s\n",
309 flags & SERIO_TIMEOUT ? " timeout" : "",
310 flags & SERIO_PARITY ? " bad parity" : "");
311 ps2_cmd_aborted(&psmouse->ps2dev);
312 goto out;
313 }
314
315 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
316 if (ps2_handle_ack(&psmouse->ps2dev, data))
317 goto out;
318
319 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
320 if (ps2_handle_response(&psmouse->ps2dev, data))
321 goto out;
322
323 if (psmouse->state <= PSMOUSE_RESYNCING)
324 goto out;
325
326 if (psmouse->state == PSMOUSE_ACTIVATED &&
327 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
328 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
329 psmouse->name, psmouse->phys, psmouse->pktcnt);
330 psmouse->badbyte = psmouse->packet[0];
331 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
332 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
333 goto out;
334 }
335
336 psmouse->packet[psmouse->pktcnt++] = data;
337 /*
338 * Check if this is a new device announcement (0xAA 0x00)
339 */
340 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
341 if (psmouse->pktcnt == 1) {
342 psmouse->last = jiffies;
343 goto out;
344 }
345
346 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
347 (psmouse->type == PSMOUSE_HGPK &&
348 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
349 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
350 serio_reconnect(serio);
351 goto out;
352 }
353 /*
354 * Not a new device, try processing first byte normally
355 */
356 psmouse->pktcnt = 1;
357 if (psmouse_handle_byte(psmouse))
358 goto out;
359
360 psmouse->packet[psmouse->pktcnt++] = data;
361 }
362
363 /*
364 * See if we need to force resync because mouse was idle for too long
365 */
366 if (psmouse->state == PSMOUSE_ACTIVATED &&
367 psmouse->pktcnt == 1 && psmouse->resync_time &&
368 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
369 psmouse->badbyte = psmouse->packet[0];
370 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
371 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
372 goto out;
373 }
374
375 psmouse->last = jiffies;
376 psmouse_handle_byte(psmouse);
377
378 out:
379 return IRQ_HANDLED;
380 }
381
382
383 /*
384 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
385 * using sliced syntax, understood by advanced devices, such as Logitech
386 * or Synaptics touchpads. The command is encoded as:
387 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
388 * is the command.
389 */
390 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
391 {
392 int i;
393
394 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
395 return -1;
396
397 for (i = 6; i >= 0; i -= 2) {
398 unsigned char d = (command >> i) & 3;
399 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
400 return -1;
401 }
402
403 return 0;
404 }
405
406
407 /*
408 * psmouse_reset() resets the mouse into power-on state.
409 */
410 int psmouse_reset(struct psmouse *psmouse)
411 {
412 unsigned char param[2];
413
414 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
415 return -1;
416
417 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
418 return -1;
419
420 return 0;
421 }
422
423 /*
424 * Here we set the mouse resolution.
425 */
426
427 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
428 {
429 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
430 unsigned char p;
431
432 if (resolution == 0 || resolution > 200)
433 resolution = 200;
434
435 p = params[resolution / 50];
436 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
437 psmouse->resolution = 25 << p;
438 }
439
440 /*
441 * Here we set the mouse report rate.
442 */
443
444 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
445 {
446 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
447 unsigned char r;
448 int i = 0;
449
450 while (rates[i] > rate) i++;
451 r = rates[i];
452 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
453 psmouse->rate = r;
454 }
455
456 /*
457 * Here we set the mouse scaling.
458 */
459
460 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
461 {
462 ps2_command(&psmouse->ps2dev, NULL,
463 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
464 PSMOUSE_CMD_SETSCALE11);
465 }
466
467 /*
468 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
469 */
470
471 static int psmouse_poll(struct psmouse *psmouse)
472 {
473 return ps2_command(&psmouse->ps2dev, psmouse->packet,
474 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
475 }
476
477 /*
478 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
479 */
480 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
481 {
482 int i;
483
484 if (!strncmp(psmouse->ps2dev.serio->firmware_id, "PNP:", 4))
485 for (i = 0; ids[i]; i++)
486 if (strstr(psmouse->ps2dev.serio->firmware_id, ids[i]))
487 return true;
488
489 return false;
490 }
491
492 /*
493 * Genius NetMouse magic init.
494 */
495 static int genius_detect(struct psmouse *psmouse, bool set_properties)
496 {
497 struct ps2dev *ps2dev = &psmouse->ps2dev;
498 unsigned char param[4];
499
500 param[0] = 3;
501 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
502 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
503 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
504 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
505 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
506
507 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
508 return -1;
509
510 if (set_properties) {
511 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
512 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
513 __set_bit(BTN_SIDE, psmouse->dev->keybit);
514 __set_bit(REL_WHEEL, psmouse->dev->relbit);
515
516 psmouse->vendor = "Genius";
517 psmouse->name = "Mouse";
518 psmouse->pktsize = 4;
519 }
520
521 return 0;
522 }
523
524 /*
525 * IntelliMouse magic init.
526 */
527 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
528 {
529 struct ps2dev *ps2dev = &psmouse->ps2dev;
530 unsigned char param[2];
531
532 param[0] = 200;
533 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
534 param[0] = 100;
535 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
536 param[0] = 80;
537 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
538 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
539
540 if (param[0] != 3)
541 return -1;
542
543 if (set_properties) {
544 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
545 __set_bit(REL_WHEEL, psmouse->dev->relbit);
546
547 if (!psmouse->vendor)
548 psmouse->vendor = "Generic";
549 if (!psmouse->name)
550 psmouse->name = "Wheel Mouse";
551 psmouse->pktsize = 4;
552 }
553
554 return 0;
555 }
556
557 /*
558 * Try IntelliMouse/Explorer magic init.
559 */
560 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
561 {
562 struct ps2dev *ps2dev = &psmouse->ps2dev;
563 unsigned char param[2];
564
565 intellimouse_detect(psmouse, 0);
566
567 param[0] = 200;
568 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
569 param[0] = 200;
570 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
571 param[0] = 80;
572 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
573 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
574
575 if (param[0] != 4)
576 return -1;
577
578 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
579 param[0] = 200;
580 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
581 param[0] = 80;
582 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
583 param[0] = 40;
584 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
585
586 if (set_properties) {
587 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
588 __set_bit(REL_WHEEL, psmouse->dev->relbit);
589 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
590 __set_bit(BTN_SIDE, psmouse->dev->keybit);
591 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
592
593 if (!psmouse->vendor)
594 psmouse->vendor = "Generic";
595 if (!psmouse->name)
596 psmouse->name = "Explorer Mouse";
597 psmouse->pktsize = 4;
598 }
599
600 return 0;
601 }
602
603 /*
604 * Kensington ThinkingMouse / ExpertMouse magic init.
605 */
606 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
607 {
608 struct ps2dev *ps2dev = &psmouse->ps2dev;
609 unsigned char param[2];
610 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
611 int i;
612
613 param[0] = 10;
614 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
615 param[0] = 0;
616 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
617 for (i = 0; i < ARRAY_SIZE(seq); i++) {
618 param[0] = seq[i];
619 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
620 }
621 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
622
623 if (param[0] != 2)
624 return -1;
625
626 if (set_properties) {
627 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
628 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
629
630 psmouse->vendor = "Kensington";
631 psmouse->name = "ThinkingMouse";
632 }
633
634 return 0;
635 }
636
637 /*
638 * Bare PS/2 protocol "detection". Always succeeds.
639 */
640 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
641 {
642 if (set_properties) {
643 if (!psmouse->vendor)
644 psmouse->vendor = "Generic";
645 if (!psmouse->name)
646 psmouse->name = "Mouse";
647
648 /*
649 * We have no way of figuring true number of buttons so let's
650 * assume that the device has 3.
651 */
652 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
653 }
654
655 return 0;
656 }
657
658 /*
659 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
660 * must be forced by sysfs protocol writing.
661 */
662 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
663 {
664 if (set_properties) {
665 psmouse->vendor = "Cortron";
666 psmouse->name = "PS/2 Trackball";
667
668 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
669 __set_bit(BTN_SIDE, psmouse->dev->keybit);
670 }
671
672 return 0;
673 }
674
675 /*
676 * Apply default settings to the psmouse structure. Most of them will
677 * be overridden by individual protocol initialization routines.
678 */
679
680 static void psmouse_apply_defaults(struct psmouse *psmouse)
681 {
682 struct input_dev *input_dev = psmouse->dev;
683
684 memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
685 memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
686 memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
687 memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
688 memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
689
690 __set_bit(EV_KEY, input_dev->evbit);
691 __set_bit(EV_REL, input_dev->evbit);
692
693 __set_bit(BTN_LEFT, input_dev->keybit);
694 __set_bit(BTN_RIGHT, input_dev->keybit);
695
696 __set_bit(REL_X, input_dev->relbit);
697 __set_bit(REL_Y, input_dev->relbit);
698
699 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
700
701 psmouse->set_rate = psmouse_set_rate;
702 psmouse->set_resolution = psmouse_set_resolution;
703 psmouse->set_scale = psmouse_set_scale;
704 psmouse->poll = psmouse_poll;
705 psmouse->protocol_handler = psmouse_process_byte;
706 psmouse->pktsize = 3;
707 psmouse->reconnect = NULL;
708 psmouse->disconnect = NULL;
709 psmouse->cleanup = NULL;
710 psmouse->pt_activate = NULL;
711 psmouse->pt_deactivate = NULL;
712 }
713
714 /*
715 * Apply default settings to the psmouse structure and call specified
716 * protocol detection or initialization routine.
717 */
718 static int psmouse_do_detect(int (*detect)(struct psmouse *psmouse,
719 bool set_properties),
720 struct psmouse *psmouse, bool set_properties)
721 {
722 if (set_properties)
723 psmouse_apply_defaults(psmouse);
724
725 return detect(psmouse, set_properties);
726 }
727
728 /*
729 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
730 * the mouse may have.
731 */
732
733 static int psmouse_extensions(struct psmouse *psmouse,
734 unsigned int max_proto, bool set_properties)
735 {
736 bool synaptics_hardware = false;
737
738 /* Always check for focaltech, this is safe as it uses pnp-id matching */
739 if (psmouse_do_detect(focaltech_detect, psmouse, set_properties) == 0) {
740 if (max_proto > PSMOUSE_IMEX) {
741 if (!set_properties || focaltech_init(psmouse) == 0) {
742 if (IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH))
743 return PSMOUSE_FOCALTECH;
744 /*
745 * Note that we need to also restrict
746 * psmouse_max_proto so that psmouse_initialize()
747 * does not try to reset rate and resolution,
748 * because even that upsets the device.
749 */
750 psmouse_max_proto = PSMOUSE_PS2;
751 return PSMOUSE_PS2;
752 }
753 }
754 }
755
756 /*
757 * We always check for lifebook because it does not disturb mouse
758 * (it only checks DMI information).
759 */
760 if (psmouse_do_detect(lifebook_detect, psmouse, set_properties) == 0) {
761 if (max_proto > PSMOUSE_IMEX) {
762 if (!set_properties || lifebook_init(psmouse) == 0)
763 return PSMOUSE_LIFEBOOK;
764 }
765 }
766
767 /*
768 * Try Kensington ThinkingMouse (we try first, because synaptics probe
769 * upsets the thinkingmouse).
770 */
771
772 if (max_proto > PSMOUSE_IMEX &&
773 psmouse_do_detect(thinking_detect, psmouse, set_properties) == 0) {
774 return PSMOUSE_THINKPS;
775 }
776
777 /*
778 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
779 * support is disabled in config - we need to know if it is synaptics so we
780 * can reset it properly after probing for intellimouse.
781 */
782 if (max_proto > PSMOUSE_PS2 &&
783 psmouse_do_detect(synaptics_detect, psmouse, set_properties) == 0) {
784 synaptics_hardware = true;
785
786 if (max_proto > PSMOUSE_IMEX) {
787 /*
788 * Try activating protocol, but check if support is enabled first, since
789 * we try detecting Synaptics even when protocol is disabled.
790 */
791 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) &&
792 (!set_properties || synaptics_init(psmouse) == 0)) {
793 return PSMOUSE_SYNAPTICS;
794 }
795
796 /*
797 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
798 * Unfortunately Logitech/Genius probes confuse some firmware versions so
799 * we'll have to skip them.
800 */
801 max_proto = PSMOUSE_IMEX;
802 }
803 /*
804 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
805 */
806 synaptics_reset(psmouse);
807 }
808
809 /*
810 * Try Cypress Trackpad.
811 * Must try it before Finger Sensing Pad because Finger Sensing Pad probe
812 * upsets some modules of Cypress Trackpads.
813 */
814 if (max_proto > PSMOUSE_IMEX &&
815 cypress_detect(psmouse, set_properties) == 0) {
816 if (IS_ENABLED(CONFIG_MOUSE_PS2_CYPRESS)) {
817 if (cypress_init(psmouse) == 0)
818 return PSMOUSE_CYPRESS;
819
820 /*
821 * Finger Sensing Pad probe upsets some modules of
822 * Cypress Trackpad, must avoid Finger Sensing Pad
823 * probe if Cypress Trackpad device detected.
824 */
825 return PSMOUSE_PS2;
826 }
827
828 max_proto = PSMOUSE_IMEX;
829 }
830
831 /*
832 * Try ALPS TouchPad
833 */
834 if (max_proto > PSMOUSE_IMEX) {
835 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
836 if (psmouse_do_detect(alps_detect,
837 psmouse, set_properties) == 0) {
838 if (!set_properties || alps_init(psmouse) == 0)
839 return PSMOUSE_ALPS;
840 /*
841 * Init failed, try basic relative protocols
842 */
843 max_proto = PSMOUSE_IMEX;
844 }
845 }
846
847 /*
848 * Try OLPC HGPK touchpad.
849 */
850 if (max_proto > PSMOUSE_IMEX &&
851 psmouse_do_detect(hgpk_detect, psmouse, set_properties) == 0) {
852 if (!set_properties || hgpk_init(psmouse) == 0)
853 return PSMOUSE_HGPK;
854 /*
855 * Init failed, try basic relative protocols
856 */
857 max_proto = PSMOUSE_IMEX;
858 }
859
860 /*
861 * Try Elantech touchpad.
862 */
863 if (max_proto > PSMOUSE_IMEX &&
864 psmouse_do_detect(elantech_detect, psmouse, set_properties) == 0) {
865 if (!set_properties || elantech_init(psmouse) == 0)
866 return PSMOUSE_ELANTECH;
867 /*
868 * Init failed, try basic relative protocols
869 */
870 max_proto = PSMOUSE_IMEX;
871 }
872
873 if (max_proto > PSMOUSE_IMEX) {
874 if (psmouse_do_detect(genius_detect,
875 psmouse, set_properties) == 0)
876 return PSMOUSE_GENPS;
877
878 if (psmouse_do_detect(ps2pp_init,
879 psmouse, set_properties) == 0)
880 return PSMOUSE_PS2PP;
881
882 if (psmouse_do_detect(trackpoint_detect,
883 psmouse, set_properties) == 0)
884 return PSMOUSE_TRACKPOINT;
885
886 if (psmouse_do_detect(touchkit_ps2_detect,
887 psmouse, set_properties) == 0)
888 return PSMOUSE_TOUCHKIT_PS2;
889 }
890
891 /*
892 * Try Finger Sensing Pad. We do it here because its probe upsets
893 * Trackpoint devices (causing TP_READ_ID command to time out).
894 */
895 if (max_proto > PSMOUSE_IMEX) {
896 if (psmouse_do_detect(fsp_detect,
897 psmouse, set_properties) == 0) {
898 if (!set_properties || fsp_init(psmouse) == 0)
899 return PSMOUSE_FSP;
900 /*
901 * Init failed, try basic relative protocols
902 */
903 max_proto = PSMOUSE_IMEX;
904 }
905 }
906
907 /*
908 * Reset to defaults in case the device got confused by extended
909 * protocol probes. Note that we follow up with full reset because
910 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
911 */
912 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
913 psmouse_reset(psmouse);
914
915 if (max_proto >= PSMOUSE_IMEX &&
916 psmouse_do_detect(im_explorer_detect,
917 psmouse, set_properties) == 0) {
918 return PSMOUSE_IMEX;
919 }
920
921 if (max_proto >= PSMOUSE_IMPS &&
922 psmouse_do_detect(intellimouse_detect,
923 psmouse, set_properties) == 0) {
924 return PSMOUSE_IMPS;
925 }
926
927 /*
928 * Okay, all failed, we have a standard mouse here. The number of the buttons
929 * is still a question, though. We assume 3.
930 */
931 psmouse_do_detect(ps2bare_detect, psmouse, set_properties);
932
933 if (synaptics_hardware) {
934 /*
935 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
936 * We need to reset the touchpad because if there is a track point on the
937 * pass through port it could get disabled while probing for protocol
938 * extensions.
939 */
940 psmouse_reset(psmouse);
941 }
942
943 return PSMOUSE_PS2;
944 }
945
946 static const struct psmouse_protocol psmouse_protocols[] = {
947 {
948 .type = PSMOUSE_PS2,
949 .name = "PS/2",
950 .alias = "bare",
951 .maxproto = true,
952 .ignore_parity = true,
953 .detect = ps2bare_detect,
954 },
955 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
956 {
957 .type = PSMOUSE_PS2PP,
958 .name = "PS2++",
959 .alias = "logitech",
960 .detect = ps2pp_init,
961 },
962 #endif
963 {
964 .type = PSMOUSE_THINKPS,
965 .name = "ThinkPS/2",
966 .alias = "thinkps",
967 .detect = thinking_detect,
968 },
969 #ifdef CONFIG_MOUSE_PS2_CYPRESS
970 {
971 .type = PSMOUSE_CYPRESS,
972 .name = "CyPS/2",
973 .alias = "cypress",
974 .detect = cypress_detect,
975 .init = cypress_init,
976 },
977 #endif
978 {
979 .type = PSMOUSE_GENPS,
980 .name = "GenPS/2",
981 .alias = "genius",
982 .detect = genius_detect,
983 },
984 {
985 .type = PSMOUSE_IMPS,
986 .name = "ImPS/2",
987 .alias = "imps",
988 .maxproto = true,
989 .ignore_parity = true,
990 .detect = intellimouse_detect,
991 },
992 {
993 .type = PSMOUSE_IMEX,
994 .name = "ImExPS/2",
995 .alias = "exps",
996 .maxproto = true,
997 .ignore_parity = true,
998 .detect = im_explorer_detect,
999 },
1000 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
1001 {
1002 .type = PSMOUSE_SYNAPTICS,
1003 .name = "SynPS/2",
1004 .alias = "synaptics",
1005 .detect = synaptics_detect,
1006 .init = synaptics_init,
1007 },
1008 {
1009 .type = PSMOUSE_SYNAPTICS_RELATIVE,
1010 .name = "SynRelPS/2",
1011 .alias = "synaptics-relative",
1012 .detect = synaptics_detect,
1013 .init = synaptics_init_relative,
1014 },
1015 #endif
1016 #ifdef CONFIG_MOUSE_PS2_ALPS
1017 {
1018 .type = PSMOUSE_ALPS,
1019 .name = "AlpsPS/2",
1020 .alias = "alps",
1021 .detect = alps_detect,
1022 .init = alps_init,
1023 },
1024 #endif
1025 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
1026 {
1027 .type = PSMOUSE_LIFEBOOK,
1028 .name = "LBPS/2",
1029 .alias = "lifebook",
1030 .init = lifebook_init,
1031 },
1032 #endif
1033 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
1034 {
1035 .type = PSMOUSE_TRACKPOINT,
1036 .name = "TPPS/2",
1037 .alias = "trackpoint",
1038 .detect = trackpoint_detect,
1039 },
1040 #endif
1041 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
1042 {
1043 .type = PSMOUSE_TOUCHKIT_PS2,
1044 .name = "touchkitPS/2",
1045 .alias = "touchkit",
1046 .detect = touchkit_ps2_detect,
1047 },
1048 #endif
1049 #ifdef CONFIG_MOUSE_PS2_OLPC
1050 {
1051 .type = PSMOUSE_HGPK,
1052 .name = "OLPC HGPK",
1053 .alias = "hgpk",
1054 .detect = hgpk_detect,
1055 },
1056 #endif
1057 #ifdef CONFIG_MOUSE_PS2_ELANTECH
1058 {
1059 .type = PSMOUSE_ELANTECH,
1060 .name = "ETPS/2",
1061 .alias = "elantech",
1062 .detect = elantech_detect,
1063 .init = elantech_init,
1064 },
1065 #endif
1066 #ifdef CONFIG_MOUSE_PS2_SENTELIC
1067 {
1068 .type = PSMOUSE_FSP,
1069 .name = "FSPPS/2",
1070 .alias = "fsp",
1071 .detect = fsp_detect,
1072 .init = fsp_init,
1073 },
1074 #endif
1075 {
1076 .type = PSMOUSE_CORTRON,
1077 .name = "CortronPS/2",
1078 .alias = "cortps",
1079 .detect = cortron_detect,
1080 },
1081 #ifdef CONFIG_MOUSE_PS2_FOCALTECH
1082 {
1083 .type = PSMOUSE_FOCALTECH,
1084 .name = "FocalTechPS/2",
1085 .alias = "focaltech",
1086 .detect = focaltech_detect,
1087 .init = focaltech_init,
1088 },
1089 #endif
1090 {
1091 .type = PSMOUSE_AUTO,
1092 .name = "auto",
1093 .alias = "any",
1094 .maxproto = true,
1095 },
1096 };
1097
1098 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
1099 {
1100 int i;
1101
1102 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
1103 if (psmouse_protocols[i].type == type)
1104 return &psmouse_protocols[i];
1105
1106 WARN_ON(1);
1107 return &psmouse_protocols[0];
1108 }
1109
1110 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
1111 {
1112 const struct psmouse_protocol *p;
1113 int i;
1114
1115 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
1116 p = &psmouse_protocols[i];
1117
1118 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
1119 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
1120 return &psmouse_protocols[i];
1121 }
1122
1123 return NULL;
1124 }
1125
1126
1127 /*
1128 * psmouse_probe() probes for a PS/2 mouse.
1129 */
1130
1131 static int psmouse_probe(struct psmouse *psmouse)
1132 {
1133 struct ps2dev *ps2dev = &psmouse->ps2dev;
1134 unsigned char param[2];
1135
1136 /*
1137 * First, we check if it's a mouse. It should send 0x00 or 0x03
1138 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1139 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
1140 * ID queries, probably due to a firmware bug.
1141 */
1142
1143 param[0] = 0xa5;
1144 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1145 return -1;
1146
1147 if (param[0] != 0x00 && param[0] != 0x03 &&
1148 param[0] != 0x04 && param[0] != 0xff)
1149 return -1;
1150
1151 /*
1152 * Then we reset and disable the mouse so that it doesn't generate events.
1153 */
1154
1155 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
1156 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
1157 ps2dev->serio->phys);
1158
1159 return 0;
1160 }
1161
1162 /*
1163 * psmouse_initialize() initializes the mouse to a sane state.
1164 */
1165
1166 static void psmouse_initialize(struct psmouse *psmouse)
1167 {
1168 /*
1169 * We set the mouse report rate, resolution and scaling.
1170 */
1171
1172 if (psmouse_max_proto != PSMOUSE_PS2) {
1173 psmouse->set_rate(psmouse, psmouse->rate);
1174 psmouse->set_resolution(psmouse, psmouse->resolution);
1175 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1176 }
1177 }
1178
1179 /*
1180 * psmouse_activate() enables the mouse so that we get motion reports from it.
1181 */
1182
1183 int psmouse_activate(struct psmouse *psmouse)
1184 {
1185 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1186 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1187 psmouse->ps2dev.serio->phys);
1188 return -1;
1189 }
1190
1191 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1192 return 0;
1193 }
1194
1195 /*
1196 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
1197 * reports from it unless we explicitly request it.
1198 */
1199
1200 int psmouse_deactivate(struct psmouse *psmouse)
1201 {
1202 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
1203 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1204 psmouse->ps2dev.serio->phys);
1205 return -1;
1206 }
1207
1208 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1209 return 0;
1210 }
1211
1212
1213 /*
1214 * psmouse_resync() attempts to re-validate current protocol.
1215 */
1216
1217 static void psmouse_resync(struct work_struct *work)
1218 {
1219 struct psmouse *parent = NULL, *psmouse =
1220 container_of(work, struct psmouse, resync_work.work);
1221 struct serio *serio = psmouse->ps2dev.serio;
1222 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1223 bool failed = false, enabled = false;
1224 int i;
1225
1226 mutex_lock(&psmouse_mutex);
1227
1228 if (psmouse->state != PSMOUSE_RESYNCING)
1229 goto out;
1230
1231 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1232 parent = serio_get_drvdata(serio->parent);
1233 psmouse_deactivate(parent);
1234 }
1235
1236 /*
1237 * Some mice don't ACK commands sent while they are in the middle of
1238 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1239 * instead of ps2_command() which would wait for 200ms for an ACK
1240 * that may never come.
1241 * As an additional quirk ALPS touchpads may not only forget to ACK
1242 * disable command but will stop reporting taps, so if we see that
1243 * mouse at least once ACKs disable we will do full reconnect if ACK
1244 * is missing.
1245 */
1246 psmouse->num_resyncs++;
1247
1248 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1249 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1250 failed = true;
1251 } else
1252 psmouse->acks_disable_command = true;
1253
1254 /*
1255 * Poll the mouse. If it was reset the packet will be shorter than
1256 * psmouse->pktsize and ps2_command will fail. We do not expect and
1257 * do not handle scenario when mouse "upgrades" its protocol while
1258 * disconnected since it would require additional delay. If we ever
1259 * see a mouse that does it we'll adjust the code.
1260 */
1261 if (!failed) {
1262 if (psmouse->poll(psmouse))
1263 failed = true;
1264 else {
1265 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1266 for (i = 0; i < psmouse->pktsize; i++) {
1267 psmouse->pktcnt++;
1268 rc = psmouse->protocol_handler(psmouse);
1269 if (rc != PSMOUSE_GOOD_DATA)
1270 break;
1271 }
1272 if (rc != PSMOUSE_FULL_PACKET)
1273 failed = true;
1274 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1275 }
1276 }
1277 /*
1278 * Now try to enable mouse. We try to do that even if poll failed and also
1279 * repeat our attempts 5 times, otherwise we may be left out with disabled
1280 * mouse.
1281 */
1282 for (i = 0; i < 5; i++) {
1283 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1284 enabled = true;
1285 break;
1286 }
1287 msleep(200);
1288 }
1289
1290 if (!enabled) {
1291 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1292 psmouse->ps2dev.serio->phys);
1293 failed = true;
1294 }
1295
1296 if (failed) {
1297 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1298 psmouse_info(psmouse,
1299 "resync failed, issuing reconnect request\n");
1300 serio_reconnect(serio);
1301 } else
1302 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1303
1304 if (parent)
1305 psmouse_activate(parent);
1306 out:
1307 mutex_unlock(&psmouse_mutex);
1308 }
1309
1310 /*
1311 * psmouse_cleanup() resets the mouse into power-on state.
1312 */
1313
1314 static void psmouse_cleanup(struct serio *serio)
1315 {
1316 struct psmouse *psmouse = serio_get_drvdata(serio);
1317 struct psmouse *parent = NULL;
1318
1319 mutex_lock(&psmouse_mutex);
1320
1321 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1322 parent = serio_get_drvdata(serio->parent);
1323 psmouse_deactivate(parent);
1324 }
1325
1326 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1327
1328 /*
1329 * Disable stream mode so cleanup routine can proceed undisturbed.
1330 */
1331 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1332 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1333 psmouse->ps2dev.serio->phys);
1334
1335 if (psmouse->cleanup)
1336 psmouse->cleanup(psmouse);
1337
1338 /*
1339 * Reset the mouse to defaults (bare PS/2 protocol).
1340 */
1341 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1342
1343 /*
1344 * Some boxes, such as HP nx7400, get terribly confused if mouse
1345 * is not fully enabled before suspending/shutting down.
1346 */
1347 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1348
1349 if (parent) {
1350 if (parent->pt_deactivate)
1351 parent->pt_deactivate(parent);
1352
1353 psmouse_activate(parent);
1354 }
1355
1356 mutex_unlock(&psmouse_mutex);
1357 }
1358
1359 /*
1360 * psmouse_disconnect() closes and frees.
1361 */
1362
1363 static void psmouse_disconnect(struct serio *serio)
1364 {
1365 struct psmouse *psmouse, *parent = NULL;
1366
1367 psmouse = serio_get_drvdata(serio);
1368
1369 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1370
1371 mutex_lock(&psmouse_mutex);
1372
1373 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1374
1375 /* make sure we don't have a resync in progress */
1376 mutex_unlock(&psmouse_mutex);
1377 flush_workqueue(kpsmoused_wq);
1378 mutex_lock(&psmouse_mutex);
1379
1380 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1381 parent = serio_get_drvdata(serio->parent);
1382 psmouse_deactivate(parent);
1383 }
1384
1385 if (psmouse->disconnect)
1386 psmouse->disconnect(psmouse);
1387
1388 if (parent && parent->pt_deactivate)
1389 parent->pt_deactivate(parent);
1390
1391 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1392
1393 serio_close(serio);
1394 serio_set_drvdata(serio, NULL);
1395 input_unregister_device(psmouse->dev);
1396 kfree(psmouse);
1397
1398 if (parent)
1399 psmouse_activate(parent);
1400
1401 mutex_unlock(&psmouse_mutex);
1402 }
1403
1404 static int psmouse_switch_protocol(struct psmouse *psmouse,
1405 const struct psmouse_protocol *proto)
1406 {
1407 const struct psmouse_protocol *selected_proto;
1408 struct input_dev *input_dev = psmouse->dev;
1409
1410 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1411
1412 if (proto && (proto->detect || proto->init)) {
1413 psmouse_apply_defaults(psmouse);
1414
1415 if (proto->detect && proto->detect(psmouse, true) < 0)
1416 return -1;
1417
1418 if (proto->init && proto->init(psmouse) < 0)
1419 return -1;
1420
1421 psmouse->type = proto->type;
1422 selected_proto = proto;
1423 } else {
1424 psmouse->type = psmouse_extensions(psmouse,
1425 psmouse_max_proto, true);
1426 selected_proto = psmouse_protocol_by_type(psmouse->type);
1427 }
1428
1429 psmouse->ignore_parity = selected_proto->ignore_parity;
1430
1431 /*
1432 * If mouse's packet size is 3 there is no point in polling the
1433 * device in hopes to detect protocol reset - we won't get less
1434 * than 3 bytes response anyhow.
1435 */
1436 if (psmouse->pktsize == 3)
1437 psmouse->resync_time = 0;
1438
1439 /*
1440 * Some smart KVMs fake response to POLL command returning just
1441 * 3 bytes and messing up our resync logic, so if initial poll
1442 * fails we won't try polling the device anymore. Hopefully
1443 * such KVM will maintain initially selected protocol.
1444 */
1445 if (psmouse->resync_time && psmouse->poll(psmouse))
1446 psmouse->resync_time = 0;
1447
1448 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1449 selected_proto->name, psmouse->vendor, psmouse->name);
1450
1451 input_dev->name = psmouse->devname;
1452 input_dev->phys = psmouse->phys;
1453 input_dev->id.bustype = BUS_I8042;
1454 input_dev->id.vendor = 0x0002;
1455 input_dev->id.product = psmouse->type;
1456 input_dev->id.version = psmouse->model;
1457
1458 return 0;
1459 }
1460
1461 /*
1462 * psmouse_connect() is a callback from the serio module when
1463 * an unhandled serio port is found.
1464 */
1465 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1466 {
1467 struct psmouse *psmouse, *parent = NULL;
1468 struct input_dev *input_dev;
1469 int retval = 0, error = -ENOMEM;
1470
1471 mutex_lock(&psmouse_mutex);
1472
1473 /*
1474 * If this is a pass-through port deactivate parent so the device
1475 * connected to this port can be successfully identified
1476 */
1477 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1478 parent = serio_get_drvdata(serio->parent);
1479 psmouse_deactivate(parent);
1480 }
1481
1482 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1483 input_dev = input_allocate_device();
1484 if (!psmouse || !input_dev)
1485 goto err_free;
1486
1487 ps2_init(&psmouse->ps2dev, serio);
1488 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1489 psmouse->dev = input_dev;
1490 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1491
1492 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1493
1494 serio_set_drvdata(serio, psmouse);
1495
1496 error = serio_open(serio, drv);
1497 if (error)
1498 goto err_clear_drvdata;
1499
1500 if (psmouse_probe(psmouse) < 0) {
1501 error = -ENODEV;
1502 goto err_close_serio;
1503 }
1504
1505 psmouse->rate = psmouse_rate;
1506 psmouse->resolution = psmouse_resolution;
1507 psmouse->resetafter = psmouse_resetafter;
1508 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1509 psmouse->smartscroll = psmouse_smartscroll;
1510
1511 psmouse_switch_protocol(psmouse, NULL);
1512
1513 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1514 psmouse_initialize(psmouse);
1515
1516 error = input_register_device(psmouse->dev);
1517 if (error)
1518 goto err_protocol_disconnect;
1519
1520 if (parent && parent->pt_activate)
1521 parent->pt_activate(parent);
1522
1523 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1524 if (error)
1525 goto err_pt_deactivate;
1526
1527 psmouse_activate(psmouse);
1528
1529 out:
1530 /* If this is a pass-through port the parent needs to be re-activated */
1531 if (parent)
1532 psmouse_activate(parent);
1533
1534 mutex_unlock(&psmouse_mutex);
1535 return retval;
1536
1537 err_pt_deactivate:
1538 if (parent && parent->pt_deactivate)
1539 parent->pt_deactivate(parent);
1540 input_unregister_device(psmouse->dev);
1541 input_dev = NULL; /* so we don't try to free it below */
1542 err_protocol_disconnect:
1543 if (psmouse->disconnect)
1544 psmouse->disconnect(psmouse);
1545 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1546 err_close_serio:
1547 serio_close(serio);
1548 err_clear_drvdata:
1549 serio_set_drvdata(serio, NULL);
1550 err_free:
1551 input_free_device(input_dev);
1552 kfree(psmouse);
1553
1554 retval = error;
1555 goto out;
1556 }
1557
1558
1559 static int psmouse_reconnect(struct serio *serio)
1560 {
1561 struct psmouse *psmouse = serio_get_drvdata(serio);
1562 struct psmouse *parent = NULL;
1563 unsigned char type;
1564 int rc = -1;
1565
1566 mutex_lock(&psmouse_mutex);
1567
1568 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1569 parent = serio_get_drvdata(serio->parent);
1570 psmouse_deactivate(parent);
1571 }
1572
1573 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1574
1575 if (psmouse->reconnect) {
1576 if (psmouse->reconnect(psmouse))
1577 goto out;
1578 } else {
1579 psmouse_reset(psmouse);
1580
1581 if (psmouse_probe(psmouse) < 0)
1582 goto out;
1583
1584 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1585 if (psmouse->type != type)
1586 goto out;
1587 }
1588
1589 /*
1590 * OK, the device type (and capabilities) match the old one,
1591 * we can continue using it, complete initialization
1592 */
1593 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1594
1595 psmouse_initialize(psmouse);
1596
1597 if (parent && parent->pt_activate)
1598 parent->pt_activate(parent);
1599
1600 psmouse_activate(psmouse);
1601 rc = 0;
1602
1603 out:
1604 /* If this is a pass-through port the parent waits to be activated */
1605 if (parent)
1606 psmouse_activate(parent);
1607
1608 mutex_unlock(&psmouse_mutex);
1609 return rc;
1610 }
1611
1612 static struct serio_device_id psmouse_serio_ids[] = {
1613 {
1614 .type = SERIO_8042,
1615 .proto = SERIO_ANY,
1616 .id = SERIO_ANY,
1617 .extra = SERIO_ANY,
1618 },
1619 {
1620 .type = SERIO_PS_PSTHRU,
1621 .proto = SERIO_ANY,
1622 .id = SERIO_ANY,
1623 .extra = SERIO_ANY,
1624 },
1625 { 0 }
1626 };
1627
1628 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1629
1630 static struct serio_driver psmouse_drv = {
1631 .driver = {
1632 .name = "psmouse",
1633 },
1634 .description = DRIVER_DESC,
1635 .id_table = psmouse_serio_ids,
1636 .interrupt = psmouse_interrupt,
1637 .connect = psmouse_connect,
1638 .reconnect = psmouse_reconnect,
1639 .disconnect = psmouse_disconnect,
1640 .cleanup = psmouse_cleanup,
1641 };
1642
1643 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1644 char *buf)
1645 {
1646 struct serio *serio = to_serio_port(dev);
1647 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1648 struct psmouse *psmouse;
1649
1650 psmouse = serio_get_drvdata(serio);
1651
1652 return attr->show(psmouse, attr->data, buf);
1653 }
1654
1655 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1656 const char *buf, size_t count)
1657 {
1658 struct serio *serio = to_serio_port(dev);
1659 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1660 struct psmouse *psmouse, *parent = NULL;
1661 int retval;
1662
1663 retval = mutex_lock_interruptible(&psmouse_mutex);
1664 if (retval)
1665 goto out;
1666
1667 psmouse = serio_get_drvdata(serio);
1668
1669 if (attr->protect) {
1670 if (psmouse->state == PSMOUSE_IGNORE) {
1671 retval = -ENODEV;
1672 goto out_unlock;
1673 }
1674
1675 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1676 parent = serio_get_drvdata(serio->parent);
1677 psmouse_deactivate(parent);
1678 }
1679
1680 psmouse_deactivate(psmouse);
1681 }
1682
1683 retval = attr->set(psmouse, attr->data, buf, count);
1684
1685 if (attr->protect) {
1686 if (retval != -ENODEV)
1687 psmouse_activate(psmouse);
1688
1689 if (parent)
1690 psmouse_activate(parent);
1691 }
1692
1693 out_unlock:
1694 mutex_unlock(&psmouse_mutex);
1695 out:
1696 return retval;
1697 }
1698
1699 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1700 {
1701 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1702
1703 return sprintf(buf, "%u\n", *field);
1704 }
1705
1706 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1707 {
1708 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1709 unsigned int value;
1710 int err;
1711
1712 err = kstrtouint(buf, 10, &value);
1713 if (err)
1714 return err;
1715
1716 *field = value;
1717
1718 return count;
1719 }
1720
1721 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1722 {
1723 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1724 }
1725
1726 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1727 {
1728 struct serio *serio = psmouse->ps2dev.serio;
1729 struct psmouse *parent = NULL;
1730 struct input_dev *old_dev, *new_dev;
1731 const struct psmouse_protocol *proto, *old_proto;
1732 int error;
1733 int retry = 0;
1734
1735 proto = psmouse_protocol_by_name(buf, count);
1736 if (!proto)
1737 return -EINVAL;
1738
1739 if (psmouse->type == proto->type)
1740 return count;
1741
1742 new_dev = input_allocate_device();
1743 if (!new_dev)
1744 return -ENOMEM;
1745
1746 while (!list_empty(&serio->children)) {
1747 if (++retry > 3) {
1748 psmouse_warn(psmouse,
1749 "failed to destroy children ports, protocol change aborted.\n");
1750 input_free_device(new_dev);
1751 return -EIO;
1752 }
1753
1754 mutex_unlock(&psmouse_mutex);
1755 serio_unregister_child_port(serio);
1756 mutex_lock(&psmouse_mutex);
1757
1758 if (serio->drv != &psmouse_drv) {
1759 input_free_device(new_dev);
1760 return -ENODEV;
1761 }
1762
1763 if (psmouse->type == proto->type) {
1764 input_free_device(new_dev);
1765 return count; /* switched by other thread */
1766 }
1767 }
1768
1769 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1770 parent = serio_get_drvdata(serio->parent);
1771 if (parent->pt_deactivate)
1772 parent->pt_deactivate(parent);
1773 }
1774
1775 old_dev = psmouse->dev;
1776 old_proto = psmouse_protocol_by_type(psmouse->type);
1777
1778 if (psmouse->disconnect)
1779 psmouse->disconnect(psmouse);
1780
1781 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1782
1783 psmouse->dev = new_dev;
1784 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1785
1786 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1787 psmouse_reset(psmouse);
1788 /* default to PSMOUSE_PS2 */
1789 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1790 }
1791
1792 psmouse_initialize(psmouse);
1793 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1794
1795 error = input_register_device(psmouse->dev);
1796 if (error) {
1797 if (psmouse->disconnect)
1798 psmouse->disconnect(psmouse);
1799
1800 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1801 input_free_device(new_dev);
1802 psmouse->dev = old_dev;
1803 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1804 psmouse_switch_protocol(psmouse, old_proto);
1805 psmouse_initialize(psmouse);
1806 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1807
1808 return error;
1809 }
1810
1811 input_unregister_device(old_dev);
1812
1813 if (parent && parent->pt_activate)
1814 parent->pt_activate(parent);
1815
1816 return count;
1817 }
1818
1819 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1820 {
1821 unsigned int value;
1822 int err;
1823
1824 err = kstrtouint(buf, 10, &value);
1825 if (err)
1826 return err;
1827
1828 psmouse->set_rate(psmouse, value);
1829 return count;
1830 }
1831
1832 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1833 {
1834 unsigned int value;
1835 int err;
1836
1837 err = kstrtouint(buf, 10, &value);
1838 if (err)
1839 return err;
1840
1841 psmouse->set_resolution(psmouse, value);
1842 return count;
1843 }
1844
1845
1846 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1847 {
1848 const struct psmouse_protocol *proto;
1849
1850 if (!val)
1851 return -EINVAL;
1852
1853 proto = psmouse_protocol_by_name(val, strlen(val));
1854
1855 if (!proto || !proto->maxproto)
1856 return -EINVAL;
1857
1858 *((unsigned int *)kp->arg) = proto->type;
1859
1860 return 0;
1861 }
1862
1863 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1864 {
1865 int type = *((unsigned int *)kp->arg);
1866
1867 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
1868 }
1869
1870 static int __init psmouse_init(void)
1871 {
1872 int err;
1873
1874 lifebook_module_init();
1875 synaptics_module_init();
1876 hgpk_module_init();
1877
1878 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1879 if (!kpsmoused_wq) {
1880 pr_err("failed to create kpsmoused workqueue\n");
1881 return -ENOMEM;
1882 }
1883
1884 err = serio_register_driver(&psmouse_drv);
1885 if (err)
1886 destroy_workqueue(kpsmoused_wq);
1887
1888 return err;
1889 }
1890
1891 static void __exit psmouse_exit(void)
1892 {
1893 serio_unregister_driver(&psmouse_drv);
1894 destroy_workqueue(kpsmoused_wq);
1895 }
1896
1897 module_init(psmouse_init);
1898 module_exit(psmouse_exit);
Linux kernel - Deliverables
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