1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * PS/2 mouse driver
4 *
5 * Copyright (c) 1999-2002 Vojtech Pavlik
6 * Copyright (c) 2003-2004 Dmitry Torokhov
7 */
8
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11#define psmouse_fmt(fmt) fmt
12
13#include <linux/bitops.h>
14#include <linux/delay.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/interrupt.h>
18#include <linux/input.h>
19#include <linux/serio.h>
20#include <linux/init.h>
21#include <linux/libps2.h>
22#include <linux/mutex.h>
23#include <linux/types.h>
24
25#include "psmouse.h"
26#include "synaptics.h"
27#include "logips2pp.h"
28#include "alps.h"
29#include "hgpk.h"
30#include "lifebook.h"
31#include "trackpoint.h"
32#include "touchkit_ps2.h"
33#include "elantech.h"
34#include "sentelic.h"
35#include "cypress_ps2.h"
36#include "focaltech.h"
37#include "vmmouse.h"
38#include "byd.h"
39
40#define DRIVER_DESC "PS/2 mouse driver"
41
42MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
43MODULE_DESCRIPTION(DRIVER_DESC);
44MODULE_LICENSE("GPL");
45
46static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
47static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
48static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
49static const 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)
54module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
55MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
56
57static unsigned int psmouse_resolution = 200;
58module_param_named(resolution, psmouse_resolution, uint, 0644);
59MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
60
61static unsigned int psmouse_rate = 100;
62module_param_named(rate, psmouse_rate, uint, 0644);
63MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
64
65static bool psmouse_smartscroll = true;
66module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
67MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
68
69static bool psmouse_a4tech_2wheels;
70module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644);
71MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default).");
72
73static unsigned int psmouse_resetafter = 5;
74module_param_named(resetafter, psmouse_resetafter, uint, 0644);
75MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
76
77static unsigned int psmouse_resync_time;
78module_param_named(resync_time, psmouse_resync_time, uint, 0644);
79MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
80
81PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
82 NULL,
83 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
84PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
85 (void *) offsetof(struct psmouse, rate),
86 psmouse_show_int_attr, psmouse_attr_set_rate);
87PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
88 (void *) offsetof(struct psmouse, resolution),
89 psmouse_show_int_attr, psmouse_attr_set_resolution);
90PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
91 (void *) offsetof(struct psmouse, resetafter),
92 psmouse_show_int_attr, psmouse_set_int_attr);
93PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
94 (void *) offsetof(struct psmouse, resync_time),
95 psmouse_show_int_attr, psmouse_set_int_attr);
96
97static struct attribute *psmouse_dev_attrs[] = {
98 &psmouse_attr_protocol.dattr.attr,
99 &psmouse_attr_rate.dattr.attr,
100 &psmouse_attr_resolution.dattr.attr,
101 &psmouse_attr_resetafter.dattr.attr,
102 &psmouse_attr_resync_time.dattr.attr,
103 NULL
104};
105
106ATTRIBUTE_GROUPS(psmouse_dev);
107
108/*
109 * psmouse_mutex protects all operations changing state of mouse
110 * (connecting, disconnecting, changing rate or resolution via
111 * sysfs). We could use a per-device semaphore but since there
112 * rarely more than one PS/2 mouse connected and since semaphore
113 * is taken in "slow" paths it is not worth it.
114 */
115static DEFINE_MUTEX(psmouse_mutex);
116
117static struct workqueue_struct *kpsmoused_wq;
118
119struct psmouse *psmouse_from_serio(struct serio *serio)
120{
121 struct ps2dev *ps2dev = serio_get_drvdata(serio);
122
123 return container_of(ps2dev, struct psmouse, ps2dev);
124}
125
126void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
127{
128 input_report_key(dev, BTN_LEFT, value: buttons & BIT(0));
129 input_report_key(dev, BTN_MIDDLE, value: buttons & BIT(2));
130 input_report_key(dev, BTN_RIGHT, value: buttons & BIT(1));
131}
132
133void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
134{
135 int x, y;
136
137 x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
138 y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
139
140 input_report_rel(dev, REL_X, value: x);
141 input_report_rel(dev, REL_Y, value: -y);
142}
143
144void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
145{
146 psmouse_report_standard_buttons(dev, buttons: packet[0]);
147 psmouse_report_standard_motion(dev, packet);
148}
149
150/*
151 * psmouse_process_byte() analyzes the PS/2 data stream and reports
152 * relevant events to the input module once full packet has arrived.
153 */
154psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
155{
156 struct input_dev *dev = psmouse->dev;
157 u8 *packet = psmouse->packet;
158 int wheel;
159
160 if (psmouse->pktcnt < psmouse->pktsize)
161 return PSMOUSE_GOOD_DATA;
162
163 /* Full packet accumulated, process it */
164
165 switch (psmouse->protocol->type) {
166 case PSMOUSE_IMPS:
167 /* IntelliMouse has scroll wheel */
168 input_report_rel(dev, REL_WHEEL, value: -(s8) packet[3]);
169 break;
170
171 case PSMOUSE_IMEX:
172 /* Scroll wheel and buttons on IntelliMouse Explorer */
173 switch (packet[3] & 0xC0) {
174 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
175 input_report_rel(dev, REL_WHEEL,
176 value: -sign_extend32(value: packet[3], index: 5));
177 break;
178 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
179 input_report_rel(dev, REL_HWHEEL,
180 value: -sign_extend32(value: packet[3], index: 5));
181 break;
182 case 0x00:
183 case 0xC0:
184 wheel = sign_extend32(value: packet[3], index: 3);
185
186 /*
187 * Some A4Tech mice have two scroll wheels, with first
188 * one reporting +/-1 in the lower nibble, and second
189 * one reporting +/-2.
190 */
191 if (psmouse_a4tech_2wheels && abs(wheel) > 1)
192 input_report_rel(dev, REL_HWHEEL, value: wheel / 2);
193 else
194 input_report_rel(dev, REL_WHEEL, value: -wheel);
195
196 input_report_key(dev, BTN_SIDE, value: packet[3] & BIT(4));
197 input_report_key(dev, BTN_EXTRA, value: packet[3] & BIT(5));
198 break;
199 }
200 break;
201
202 case PSMOUSE_GENPS:
203 /* Report scroll buttons on NetMice */
204 input_report_rel(dev, REL_WHEEL, value: -(s8) packet[3]);
205
206 /* Extra buttons on Genius NewNet 3D */
207 input_report_key(dev, BTN_SIDE, value: packet[0] & BIT(6));
208 input_report_key(dev, BTN_EXTRA, value: packet[0] & BIT(7));
209 break;
210
211 case PSMOUSE_THINKPS:
212 /* Extra button on ThinkingMouse */
213 input_report_key(dev, BTN_EXTRA, value: packet[0] & BIT(3));
214
215 /*
216 * Without this bit of weirdness moving up gives wildly
217 * high Y changes.
218 */
219 packet[1] |= (packet[0] & 0x40) << 1;
220 break;
221
222 case PSMOUSE_CORTRON:
223 /*
224 * Cortron PS2 Trackball reports SIDE button in the
225 * 4th bit of the first byte.
226 */
227 input_report_key(dev, BTN_SIDE, value: packet[0] & BIT(3));
228 packet[0] |= BIT(3);
229 break;
230
231 default:
232 break;
233 }
234
235 /* Generic PS/2 Mouse */
236 packet[0] |= psmouse->extra_buttons;
237 psmouse_report_standard_packet(dev, packet);
238
239 input_sync(dev);
240
241 return PSMOUSE_FULL_PACKET;
242}
243
244void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
245 unsigned long delay)
246{
247 queue_delayed_work(wq: kpsmoused_wq, dwork: work, delay);
248}
249
250/*
251 * __psmouse_set_state() sets new psmouse state and resets all flags.
252 */
253static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
254{
255 psmouse->state = new_state;
256 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
257 psmouse->ps2dev.flags = 0;
258 psmouse->last = jiffies;
259}
260
261/*
262 * psmouse_set_state() sets new psmouse state and resets all flags and
263 * counters while holding serio lock so fighting with interrupt handler
264 * is not a concern.
265 */
266void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
267{
268 serio_pause_rx(serio: psmouse->ps2dev.serio);
269 __psmouse_set_state(psmouse, new_state);
270 serio_continue_rx(serio: psmouse->ps2dev.serio);
271}
272
273/*
274 * psmouse_handle_byte() processes one byte of the input data stream
275 * by calling corresponding protocol handler.
276 */
277static int psmouse_handle_byte(struct psmouse *psmouse)
278{
279 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
280
281 switch (rc) {
282 case PSMOUSE_BAD_DATA:
283 if (psmouse->state == PSMOUSE_ACTIVATED) {
284 psmouse_warn(psmouse,
285 "%s at %s lost sync at byte %d\n",
286 psmouse->name, psmouse->phys,
287 psmouse->pktcnt);
288 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
289 __psmouse_set_state(psmouse, new_state: PSMOUSE_IGNORE);
290 psmouse_notice(psmouse,
291 "issuing reconnect request\n");
292 serio_reconnect(serio: psmouse->ps2dev.serio);
293 return -EIO;
294 }
295 }
296 psmouse->pktcnt = 0;
297 break;
298
299 case PSMOUSE_FULL_PACKET:
300 psmouse->pktcnt = 0;
301 if (psmouse->out_of_sync_cnt) {
302 psmouse->out_of_sync_cnt = 0;
303 psmouse_notice(psmouse,
304 "%s at %s - driver resynced.\n",
305 psmouse->name, psmouse->phys);
306 }
307 break;
308
309 case PSMOUSE_GOOD_DATA:
310 break;
311 }
312 return 0;
313}
314
315static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
316{
317 switch (psmouse->oob_data_type) {
318 case PSMOUSE_OOB_NONE:
319 psmouse->oob_data_type = data;
320 break;
321
322 case PSMOUSE_OOB_EXTRA_BTNS:
323 psmouse_report_standard_buttons(dev: psmouse->dev, buttons: data);
324 input_sync(dev: psmouse->dev);
325
326 psmouse->extra_buttons = data;
327 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
328 break;
329
330 default:
331 psmouse_warn(psmouse,
332 "unknown OOB_DATA type: 0x%02x\n",
333 psmouse->oob_data_type);
334 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
335 break;
336 }
337}
338
339static enum ps2_disposition psmouse_pre_receive_byte(struct ps2dev *ps2dev,
340 u8 data,
341 unsigned int flags)
342{
343 struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev);
344
345 if (psmouse->state == PSMOUSE_IGNORE)
346 return PS2_IGNORE;
347
348 if (unlikely((flags & SERIO_TIMEOUT) ||
349 ((flags & SERIO_PARITY) &&
350 !psmouse->protocol->ignore_parity))) {
351
352 if (psmouse->state == PSMOUSE_ACTIVATED)
353 psmouse_warn(psmouse,
354 "bad data from KBC -%s%s\n",
355 flags & SERIO_TIMEOUT ? " timeout" : "",
356 flags & SERIO_PARITY ? " bad parity" : "");
357 return PS2_ERROR;
358 }
359
360 if (flags & SERIO_OOB_DATA) {
361 psmouse_handle_oob_data(psmouse, data);
362 return PS2_IGNORE;
363 }
364
365 return PS2_PROCESS;
366}
367
368static void psmouse_receive_byte(struct ps2dev *ps2dev, u8 data)
369{
370 struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev);
371
372 pm_wakeup_event(dev: &ps2dev->serio->dev, msec: 0);
373
374 if (psmouse->state <= PSMOUSE_RESYNCING)
375 return;
376
377 if (psmouse->state == PSMOUSE_ACTIVATED &&
378 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
379 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
380 psmouse->name, psmouse->phys, psmouse->pktcnt);
381 psmouse->badbyte = psmouse->packet[0];
382 __psmouse_set_state(psmouse, new_state: PSMOUSE_RESYNCING);
383 psmouse_queue_work(psmouse, work: &psmouse->resync_work, delay: 0);
384 return;
385 }
386
387 psmouse->packet[psmouse->pktcnt++] = data;
388
389 /* Check if this is a new device announcement (0xAA 0x00) */
390 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
391 if (psmouse->pktcnt == 1) {
392 psmouse->last = jiffies;
393 return;
394 }
395
396 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
397 (psmouse->protocol->type == PSMOUSE_HGPK &&
398 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
399 __psmouse_set_state(psmouse, new_state: PSMOUSE_IGNORE);
400 serio_reconnect(serio: ps2dev->serio);
401 return;
402 }
403
404 /* Not a new device, try processing first byte normally */
405 psmouse->pktcnt = 1;
406 if (psmouse_handle_byte(psmouse))
407 return;
408
409 psmouse->packet[psmouse->pktcnt++] = data;
410 }
411
412 /*
413 * See if we need to force resync because mouse was idle for
414 * too long.
415 */
416 if (psmouse->state == PSMOUSE_ACTIVATED &&
417 psmouse->pktcnt == 1 && psmouse->resync_time &&
418 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
419 psmouse->badbyte = psmouse->packet[0];
420 __psmouse_set_state(psmouse, new_state: PSMOUSE_RESYNCING);
421 psmouse_queue_work(psmouse, work: &psmouse->resync_work, delay: 0);
422 return;
423 }
424
425 psmouse->last = jiffies;
426 psmouse_handle_byte(psmouse);
427}
428
429/*
430 * psmouse_reset() resets the mouse into power-on state.
431 */
432int psmouse_reset(struct psmouse *psmouse)
433{
434 u8 param[2];
435 int error;
436
437 error = ps2_command(ps2dev: &psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
438 if (error)
439 return error;
440
441 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
442 return -EIO;
443
444 return 0;
445}
446
447/*
448 * Here we set the mouse resolution.
449 */
450void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
451{
452 static const u8 params[] = { 0, 1, 2, 2, 3 };
453 u8 p;
454
455 if (resolution == 0 || resolution > 200)
456 resolution = 200;
457
458 p = params[resolution / 50];
459 ps2_command(ps2dev: &psmouse->ps2dev, param: &p, PSMOUSE_CMD_SETRES);
460 psmouse->resolution = 25 << p;
461}
462
463/*
464 * Here we set the mouse report rate.
465 */
466static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
467{
468 static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
469 u8 r;
470 int i = 0;
471
472 while (rates[i] > rate)
473 i++;
474 r = rates[i];
475 ps2_command(ps2dev: &psmouse->ps2dev, param: &r, PSMOUSE_CMD_SETRATE);
476 psmouse->rate = r;
477}
478
479/*
480 * Here we set the mouse scaling.
481 */
482static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
483{
484 ps2_command(ps2dev: &psmouse->ps2dev, NULL,
485 command: scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
486 PSMOUSE_CMD_SETSCALE11);
487}
488
489/*
490 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
491 */
492static int psmouse_poll(struct psmouse *psmouse)
493{
494 return ps2_command(ps2dev: &psmouse->ps2dev, param: psmouse->packet,
495 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
496}
497
498static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
499{
500 int i;
501
502 for (i = 0; ids[i]; i++)
503 if (!strcasecmp(s1: id, s2: ids[i]))
504 return true;
505
506 return false;
507}
508
509/*
510 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
511 */
512bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
513{
514 struct serio *serio = psmouse->ps2dev.serio;
515 char *p, *fw_id_copy, *save_ptr;
516 bool found = false;
517
518 if (strncmp(serio->firmware_id, "PNP: ", 5))
519 return false;
520
521 fw_id_copy = kstrndup(s: &serio->firmware_id[5],
522 len: sizeof(serio->firmware_id) - 5,
523 GFP_KERNEL);
524 if (!fw_id_copy)
525 return false;
526
527 save_ptr = fw_id_copy;
528 while ((p = strsep(&fw_id_copy, " ")) != NULL) {
529 if (psmouse_check_pnp_id(id: p, ids)) {
530 found = true;
531 break;
532 }
533 }
534
535 kfree(objp: save_ptr);
536 return found;
537}
538
539/*
540 * Genius NetMouse magic init.
541 */
542static int genius_detect(struct psmouse *psmouse, bool set_properties)
543{
544 struct ps2dev *ps2dev = &psmouse->ps2dev;
545 u8 param[4];
546
547 param[0] = 3;
548 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
549 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
550 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
551 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
552 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
553
554 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
555 return -ENODEV;
556
557 if (set_properties) {
558 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
559 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
560 __set_bit(BTN_SIDE, psmouse->dev->keybit);
561 __set_bit(REL_WHEEL, psmouse->dev->relbit);
562
563 psmouse->vendor = "Genius";
564 psmouse->name = "Mouse";
565 psmouse->pktsize = 4;
566 }
567
568 return 0;
569}
570
571/*
572 * IntelliMouse magic init.
573 */
574static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
575{
576 struct ps2dev *ps2dev = &psmouse->ps2dev;
577 u8 param[2];
578
579 param[0] = 200;
580 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
581 param[0] = 100;
582 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
583 param[0] = 80;
584 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
585 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
586
587 if (param[0] != 3)
588 return -ENODEV;
589
590 if (set_properties) {
591 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
592 __set_bit(REL_WHEEL, psmouse->dev->relbit);
593
594 if (!psmouse->vendor)
595 psmouse->vendor = "Generic";
596 if (!psmouse->name)
597 psmouse->name = "Wheel Mouse";
598 psmouse->pktsize = 4;
599 }
600
601 return 0;
602}
603
604/*
605 * Try IntelliMouse/Explorer magic init.
606 */
607static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
608{
609 struct ps2dev *ps2dev = &psmouse->ps2dev;
610 u8 param[2];
611
612 intellimouse_detect(psmouse, set_properties: 0);
613
614 param[0] = 200;
615 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
616 param[0] = 200;
617 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
618 param[0] = 80;
619 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
620 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
621
622 if (param[0] != 4)
623 return -ENODEV;
624
625 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
626 param[0] = 200;
627 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
628 param[0] = 80;
629 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
630 param[0] = 40;
631 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
632
633 if (set_properties) {
634 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
635 __set_bit(REL_WHEEL, psmouse->dev->relbit);
636 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
637 __set_bit(BTN_SIDE, psmouse->dev->keybit);
638 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
639
640 if (!psmouse->vendor)
641 psmouse->vendor = "Generic";
642 if (!psmouse->name)
643 psmouse->name = "Explorer Mouse";
644 psmouse->pktsize = 4;
645 }
646
647 return 0;
648}
649
650/*
651 * Kensington ThinkingMouse / ExpertMouse magic init.
652 */
653static int thinking_detect(struct psmouse *psmouse, bool set_properties)
654{
655 struct ps2dev *ps2dev = &psmouse->ps2dev;
656 u8 param[2];
657 static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
658 int i;
659
660 param[0] = 10;
661 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
662 param[0] = 0;
663 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
664 for (i = 0; i < ARRAY_SIZE(seq); i++) {
665 param[0] = seq[i];
666 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
667 }
668 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
669
670 if (param[0] != 2)
671 return -ENODEV;
672
673 if (set_properties) {
674 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
675 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
676
677 psmouse->vendor = "Kensington";
678 psmouse->name = "ThinkingMouse";
679 }
680
681 return 0;
682}
683
684/*
685 * Bare PS/2 protocol "detection". Always succeeds.
686 */
687static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
688{
689 if (set_properties) {
690 if (!psmouse->vendor)
691 psmouse->vendor = "Generic";
692 if (!psmouse->name)
693 psmouse->name = "Mouse";
694
695 /*
696 * We have no way of figuring true number of buttons so let's
697 * assume that the device has 3.
698 */
699 input_set_capability(dev: psmouse->dev, EV_KEY, BTN_MIDDLE);
700 }
701
702 return 0;
703}
704
705/*
706 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
707 * must be forced by sysfs protocol writing.
708 */
709static int cortron_detect(struct psmouse *psmouse, bool set_properties)
710{
711 if (set_properties) {
712 psmouse->vendor = "Cortron";
713 psmouse->name = "PS/2 Trackball";
714
715 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
716 __set_bit(BTN_SIDE, psmouse->dev->keybit);
717 }
718
719 return 0;
720}
721
722static const struct psmouse_protocol psmouse_protocols[] = {
723 {
724 .type = PSMOUSE_PS2,
725 .name = "PS/2",
726 .alias = "bare",
727 .maxproto = true,
728 .ignore_parity = true,
729 .detect = ps2bare_detect,
730 .try_passthru = true,
731 },
732#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
733 {
734 .type = PSMOUSE_PS2PP,
735 .name = "PS2++",
736 .alias = "logitech",
737 .detect = ps2pp_detect,
738 },
739#endif
740 {
741 .type = PSMOUSE_THINKPS,
742 .name = "ThinkPS/2",
743 .alias = "thinkps",
744 .detect = thinking_detect,
745 },
746#ifdef CONFIG_MOUSE_PS2_CYPRESS
747 {
748 .type = PSMOUSE_CYPRESS,
749 .name = "CyPS/2",
750 .alias = "cypress",
751 .detect = cypress_detect,
752 .init = cypress_init,
753 },
754#endif
755 {
756 .type = PSMOUSE_GENPS,
757 .name = "GenPS/2",
758 .alias = "genius",
759 .detect = genius_detect,
760 },
761 {
762 .type = PSMOUSE_IMPS,
763 .name = "ImPS/2",
764 .alias = "imps",
765 .maxproto = true,
766 .ignore_parity = true,
767 .detect = intellimouse_detect,
768 .try_passthru = true,
769 },
770 {
771 .type = PSMOUSE_IMEX,
772 .name = "ImExPS/2",
773 .alias = "exps",
774 .maxproto = true,
775 .ignore_parity = true,
776 .detect = im_explorer_detect,
777 .try_passthru = true,
778 },
779#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
780 {
781 .type = PSMOUSE_SYNAPTICS,
782 .name = "SynPS/2",
783 .alias = "synaptics",
784 .detect = synaptics_detect,
785 .init = synaptics_init_absolute,
786 },
787 {
788 .type = PSMOUSE_SYNAPTICS_RELATIVE,
789 .name = "SynRelPS/2",
790 .alias = "synaptics-relative",
791 .detect = synaptics_detect,
792 .init = synaptics_init_relative,
793 },
794#endif
795#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
796 {
797 .type = PSMOUSE_SYNAPTICS_SMBUS,
798 .name = "SynSMBus",
799 .alias = "synaptics-smbus",
800 .detect = synaptics_detect,
801 .init = synaptics_init_smbus,
802 .smbus_companion = true,
803 },
804#endif
805#ifdef CONFIG_MOUSE_PS2_ALPS
806 {
807 .type = PSMOUSE_ALPS,
808 .name = "AlpsPS/2",
809 .alias = "alps",
810 .detect = alps_detect,
811 .init = alps_init,
812 },
813#endif
814#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
815 {
816 .type = PSMOUSE_LIFEBOOK,
817 .name = "LBPS/2",
818 .alias = "lifebook",
819 .detect = lifebook_detect,
820 .init = lifebook_init,
821 },
822#endif
823#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
824 {
825 .type = PSMOUSE_TRACKPOINT,
826 .name = "TPPS/2",
827 .alias = "trackpoint",
828 .detect = trackpoint_detect,
829 .try_passthru = true,
830 },
831#endif
832#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
833 {
834 .type = PSMOUSE_TOUCHKIT_PS2,
835 .name = "touchkitPS/2",
836 .alias = "touchkit",
837 .detect = touchkit_ps2_detect,
838 },
839#endif
840#ifdef CONFIG_MOUSE_PS2_OLPC
841 {
842 .type = PSMOUSE_HGPK,
843 .name = "OLPC HGPK",
844 .alias = "hgpk",
845 .detect = hgpk_detect,
846 },
847#endif
848#ifdef CONFIG_MOUSE_PS2_ELANTECH
849 {
850 .type = PSMOUSE_ELANTECH,
851 .name = "ETPS/2",
852 .alias = "elantech",
853 .detect = elantech_detect,
854 .init = elantech_init_ps2,
855 },
856#endif
857#ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
858 {
859 .type = PSMOUSE_ELANTECH_SMBUS,
860 .name = "ETSMBus",
861 .alias = "elantech-smbus",
862 .detect = elantech_detect,
863 .init = elantech_init_smbus,
864 .smbus_companion = true,
865 },
866#endif
867#ifdef CONFIG_MOUSE_PS2_SENTELIC
868 {
869 .type = PSMOUSE_FSP,
870 .name = "FSPPS/2",
871 .alias = "fsp",
872 .detect = fsp_detect,
873 .init = fsp_init,
874 },
875#endif
876 {
877 .type = PSMOUSE_CORTRON,
878 .name = "CortronPS/2",
879 .alias = "cortps",
880 .detect = cortron_detect,
881 },
882#ifdef CONFIG_MOUSE_PS2_FOCALTECH
883 {
884 .type = PSMOUSE_FOCALTECH,
885 .name = "FocalTechPS/2",
886 .alias = "focaltech",
887 .detect = focaltech_detect,
888 .init = focaltech_init,
889 },
890#endif
891#ifdef CONFIG_MOUSE_PS2_VMMOUSE
892 {
893 .type = PSMOUSE_VMMOUSE,
894 .name = VMMOUSE_PSNAME,
895 .alias = "vmmouse",
896 .detect = vmmouse_detect,
897 .init = vmmouse_init,
898 },
899#endif
900#ifdef CONFIG_MOUSE_PS2_BYD
901 {
902 .type = PSMOUSE_BYD,
903 .name = "BYDPS/2",
904 .alias = "byd",
905 .detect = byd_detect,
906 .init = byd_init,
907 },
908#endif
909 {
910 .type = PSMOUSE_AUTO,
911 .name = "auto",
912 .alias = "any",
913 .maxproto = true,
914 },
915};
916
917static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
918{
919 int i;
920
921 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
922 if (psmouse_protocols[i].type == type)
923 return &psmouse_protocols[i];
924
925 return NULL;
926}
927
928static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
929{
930 const struct psmouse_protocol *proto;
931
932 proto = __psmouse_protocol_by_type(type);
933 if (proto)
934 return proto;
935
936 WARN_ON(1);
937 return &psmouse_protocols[0];
938}
939
940static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
941{
942 const struct psmouse_protocol *p;
943 int i;
944
945 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
946 p = &psmouse_protocols[i];
947
948 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
949 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
950 return &psmouse_protocols[i];
951 }
952
953 return NULL;
954}
955
956/*
957 * Apply default settings to the psmouse structure. Most of them will
958 * be overridden by individual protocol initialization routines.
959 */
960static void psmouse_apply_defaults(struct psmouse *psmouse)
961{
962 struct input_dev *input_dev = psmouse->dev;
963
964 bitmap_zero(dst: input_dev->evbit, EV_CNT);
965 bitmap_zero(dst: input_dev->keybit, KEY_CNT);
966 bitmap_zero(dst: input_dev->relbit, REL_CNT);
967 bitmap_zero(dst: input_dev->absbit, ABS_CNT);
968 bitmap_zero(dst: input_dev->mscbit, MSC_CNT);
969
970 input_set_capability(dev: input_dev, EV_KEY, BTN_LEFT);
971 input_set_capability(dev: input_dev, EV_KEY, BTN_RIGHT);
972
973 input_set_capability(dev: input_dev, EV_REL, REL_X);
974 input_set_capability(dev: input_dev, EV_REL, REL_Y);
975
976 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
977
978 psmouse->protocol = &psmouse_protocols[0];
979
980 psmouse->set_rate = psmouse_set_rate;
981 psmouse->set_resolution = psmouse_set_resolution;
982 psmouse->set_scale = psmouse_set_scale;
983 psmouse->poll = psmouse_poll;
984 psmouse->protocol_handler = psmouse_process_byte;
985 psmouse->pktsize = 3;
986 psmouse->reconnect = NULL;
987 psmouse->fast_reconnect = NULL;
988 psmouse->disconnect = NULL;
989 psmouse->cleanup = NULL;
990 psmouse->pt_activate = NULL;
991 psmouse->pt_deactivate = NULL;
992}
993
994static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
995 struct psmouse *psmouse, bool allow_passthrough,
996 bool set_properties)
997{
998 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
999 !allow_passthrough) {
1000 return false;
1001 }
1002
1003 if (set_properties)
1004 psmouse_apply_defaults(psmouse);
1005
1006 return detect(psmouse, set_properties) == 0;
1007}
1008
1009static bool psmouse_try_protocol(struct psmouse *psmouse,
1010 enum psmouse_type type,
1011 unsigned int *max_proto,
1012 bool set_properties, bool init_allowed)
1013{
1014 const struct psmouse_protocol *proto;
1015
1016 proto = __psmouse_protocol_by_type(type);
1017 if (!proto)
1018 return false;
1019
1020 if (!psmouse_do_detect(detect: proto->detect, psmouse, allow_passthrough: proto->try_passthru,
1021 set_properties))
1022 return false;
1023
1024 if (set_properties && proto->init && init_allowed) {
1025 if (proto->init(psmouse) != 0) {
1026 /*
1027 * We detected device, but init failed. Adjust
1028 * max_proto so we only try standard protocols.
1029 */
1030 if (*max_proto > PSMOUSE_IMEX)
1031 *max_proto = PSMOUSE_IMEX;
1032
1033 return false;
1034 }
1035 }
1036
1037 return true;
1038}
1039
1040/*
1041 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
1042 * the mouse may have.
1043 */
1044static int psmouse_extensions(struct psmouse *psmouse,
1045 unsigned int max_proto, bool set_properties)
1046{
1047 bool synaptics_hardware = false;
1048 int ret;
1049
1050 /*
1051 * Always check for focaltech, this is safe as it uses pnp-id
1052 * matching.
1053 */
1054 if (psmouse_do_detect(detect: focaltech_detect,
1055 psmouse, allow_passthrough: false, set_properties)) {
1056 if (max_proto > PSMOUSE_IMEX &&
1057 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
1058 (!set_properties || focaltech_init(psmouse) == 0)) {
1059 return PSMOUSE_FOCALTECH;
1060 }
1061 /*
1062 * Restrict psmouse_max_proto so that psmouse_initialize()
1063 * does not try to reset rate and resolution, because even
1064 * that upsets the device.
1065 * This also causes us to basically fall through to basic
1066 * protocol detection, where we fully reset the mouse,
1067 * and set it up as bare PS/2 protocol device.
1068 */
1069 psmouse_max_proto = max_proto = PSMOUSE_PS2;
1070 }
1071
1072 /*
1073 * We always check for LifeBook because it does not disturb mouse
1074 * (it only checks DMI information).
1075 */
1076 if (psmouse_try_protocol(psmouse, type: PSMOUSE_LIFEBOOK, max_proto: &max_proto,
1077 set_properties, init_allowed: max_proto > PSMOUSE_IMEX))
1078 return PSMOUSE_LIFEBOOK;
1079
1080 if (psmouse_try_protocol(psmouse, type: PSMOUSE_VMMOUSE, max_proto: &max_proto,
1081 set_properties, init_allowed: max_proto > PSMOUSE_IMEX))
1082 return PSMOUSE_VMMOUSE;
1083
1084 /*
1085 * Try Kensington ThinkingMouse (we try first, because Synaptics
1086 * probe upsets the ThinkingMouse).
1087 */
1088 if (max_proto > PSMOUSE_IMEX &&
1089 psmouse_try_protocol(psmouse, type: PSMOUSE_THINKPS, max_proto: &max_proto,
1090 set_properties, init_allowed: true)) {
1091 return PSMOUSE_THINKPS;
1092 }
1093
1094 /*
1095 * Try Synaptics TouchPad. Note that probing is done even if
1096 * Synaptics protocol support is disabled in config - we need to
1097 * know if it is Synaptics so we can reset it properly after
1098 * probing for IntelliMouse.
1099 */
1100 if (max_proto > PSMOUSE_PS2 &&
1101 psmouse_do_detect(detect: synaptics_detect,
1102 psmouse, allow_passthrough: false, set_properties)) {
1103 synaptics_hardware = true;
1104
1105 if (max_proto > PSMOUSE_IMEX) {
1106 /*
1107 * Try activating protocol, but check if support is
1108 * enabled first, since we try detecting Synaptics
1109 * even when protocol is disabled.
1110 */
1111 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
1112 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
1113 if (!set_properties)
1114 return PSMOUSE_SYNAPTICS;
1115
1116 ret = synaptics_init(psmouse);
1117 if (ret >= 0)
1118 return ret;
1119 }
1120
1121 /*
1122 * Some Synaptics touchpads can emulate extended
1123 * protocols (like IMPS/2). Unfortunately
1124 * Logitech/Genius probes confuse some firmware
1125 * versions so we'll have to skip them.
1126 */
1127 max_proto = PSMOUSE_IMEX;
1128 }
1129
1130 /*
1131 * Make sure that touchpad is in relative mode, gestures
1132 * (taps) are enabled.
1133 */
1134 synaptics_reset(psmouse);
1135 }
1136
1137 /*
1138 * Try Cypress Trackpad. We must try it before Finger Sensing Pad
1139 * because Finger Sensing Pad probe upsets some modules of Cypress
1140 * Trackpads.
1141 */
1142 if (max_proto > PSMOUSE_IMEX &&
1143 psmouse_try_protocol(psmouse, type: PSMOUSE_CYPRESS, max_proto: &max_proto,
1144 set_properties, init_allowed: true)) {
1145 return PSMOUSE_CYPRESS;
1146 }
1147
1148 /* Try ALPS TouchPad */
1149 if (max_proto > PSMOUSE_IMEX) {
1150 ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1151 if (psmouse_try_protocol(psmouse, type: PSMOUSE_ALPS,
1152 max_proto: &max_proto, set_properties, init_allowed: true))
1153 return PSMOUSE_ALPS;
1154 }
1155
1156 /* Try OLPC HGPK touchpad */
1157 if (max_proto > PSMOUSE_IMEX &&
1158 psmouse_try_protocol(psmouse, type: PSMOUSE_HGPK, max_proto: &max_proto,
1159 set_properties, init_allowed: true)) {
1160 return PSMOUSE_HGPK;
1161 }
1162
1163 /* Try Elantech touchpad */
1164 if (max_proto > PSMOUSE_IMEX &&
1165 psmouse_try_protocol(psmouse, type: PSMOUSE_ELANTECH,
1166 max_proto: &max_proto, set_properties, init_allowed: false)) {
1167 if (!set_properties)
1168 return PSMOUSE_ELANTECH;
1169
1170 ret = elantech_init(psmouse);
1171 if (ret >= 0)
1172 return ret;
1173 }
1174
1175 if (max_proto > PSMOUSE_IMEX) {
1176 if (psmouse_try_protocol(psmouse, type: PSMOUSE_GENPS,
1177 max_proto: &max_proto, set_properties, init_allowed: true))
1178 return PSMOUSE_GENPS;
1179
1180 if (psmouse_try_protocol(psmouse, type: PSMOUSE_PS2PP,
1181 max_proto: &max_proto, set_properties, init_allowed: true))
1182 return PSMOUSE_PS2PP;
1183
1184 if (psmouse_try_protocol(psmouse, type: PSMOUSE_TRACKPOINT,
1185 max_proto: &max_proto, set_properties, init_allowed: true))
1186 return PSMOUSE_TRACKPOINT;
1187
1188 if (psmouse_try_protocol(psmouse, type: PSMOUSE_TOUCHKIT_PS2,
1189 max_proto: &max_proto, set_properties, init_allowed: true))
1190 return PSMOUSE_TOUCHKIT_PS2;
1191 }
1192
1193 /*
1194 * Try Finger Sensing Pad. We do it here because its probe upsets
1195 * Trackpoint devices (causing TP_READ_ID command to time out).
1196 */
1197 if (max_proto > PSMOUSE_IMEX &&
1198 psmouse_try_protocol(psmouse, type: PSMOUSE_FSP,
1199 max_proto: &max_proto, set_properties, init_allowed: true)) {
1200 return PSMOUSE_FSP;
1201 }
1202
1203 /*
1204 * Reset to defaults in case the device got confused by extended
1205 * protocol probes. Note that we follow up with full reset because
1206 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
1207 */
1208 ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1209 psmouse_reset(psmouse);
1210
1211 if (max_proto >= PSMOUSE_IMEX &&
1212 psmouse_try_protocol(psmouse, type: PSMOUSE_IMEX,
1213 max_proto: &max_proto, set_properties, init_allowed: true)) {
1214 return PSMOUSE_IMEX;
1215 }
1216
1217 if (max_proto >= PSMOUSE_IMPS &&
1218 psmouse_try_protocol(psmouse, type: PSMOUSE_IMPS,
1219 max_proto: &max_proto, set_properties, init_allowed: true)) {
1220 return PSMOUSE_IMPS;
1221 }
1222
1223 /*
1224 * Okay, all failed, we have a standard mouse here. The number of
1225 * the buttons is still a question, though. We assume 3.
1226 */
1227 psmouse_try_protocol(psmouse, type: PSMOUSE_PS2,
1228 max_proto: &max_proto, set_properties, init_allowed: true);
1229
1230 if (synaptics_hardware) {
1231 /*
1232 * We detected Synaptics hardware but it did not respond to
1233 * IMPS/2 probes. We need to reset the touchpad because if
1234 * there is a track point on the pass through port it could
1235 * get disabled while probing for protocol extensions.
1236 */
1237 psmouse_reset(psmouse);
1238 }
1239
1240 return PSMOUSE_PS2;
1241}
1242
1243/*
1244 * psmouse_probe() probes for a PS/2 mouse.
1245 */
1246static int psmouse_probe(struct psmouse *psmouse)
1247{
1248 struct ps2dev *ps2dev = &psmouse->ps2dev;
1249 u8 param[2];
1250 int error;
1251
1252 /*
1253 * First, we check if it's a mouse. It should send 0x00 or 0x03 in
1254 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1255 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
1256 * subsequent ID queries, probably due to a firmware bug.
1257 */
1258 param[0] = 0xa5;
1259 error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
1260 if (error)
1261 return error;
1262
1263 if (param[0] != 0x00 && param[0] != 0x03 &&
1264 param[0] != 0x04 && param[0] != 0xff)
1265 return -ENODEV;
1266
1267 /*
1268 * Then we reset and disable the mouse so that it doesn't generate
1269 * events.
1270 */
1271 error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1272 if (error)
1273 psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
1274 ps2dev->serio->phys, error);
1275
1276 return 0;
1277}
1278
1279/*
1280 * psmouse_initialize() initializes the mouse to a sane state.
1281 */
1282static void psmouse_initialize(struct psmouse *psmouse)
1283{
1284 /*
1285 * We set the mouse report rate, resolution and scaling.
1286 */
1287 if (psmouse_max_proto != PSMOUSE_PS2) {
1288 psmouse->set_rate(psmouse, psmouse->rate);
1289 psmouse->set_resolution(psmouse, psmouse->resolution);
1290 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1291 }
1292}
1293
1294/*
1295 * psmouse_activate() enables the mouse so that we get motion reports from it.
1296 */
1297int psmouse_activate(struct psmouse *psmouse)
1298{
1299 if (ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1300 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1301 psmouse->ps2dev.serio->phys);
1302 return -1;
1303 }
1304
1305 psmouse_set_state(psmouse, new_state: PSMOUSE_ACTIVATED);
1306 return 0;
1307}
1308
1309/*
1310 * psmouse_deactivate() puts the mouse into poll mode so that we don't get
1311 * motion reports from it unless we explicitly request it.
1312 */
1313int psmouse_deactivate(struct psmouse *psmouse)
1314{
1315 int error;
1316
1317 error = ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
1318 if (error) {
1319 psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
1320 psmouse->ps2dev.serio->phys, error);
1321 return error;
1322 }
1323
1324 psmouse_set_state(psmouse, new_state: PSMOUSE_CMD_MODE);
1325 return 0;
1326}
1327
1328/*
1329 * psmouse_resync() attempts to re-validate current protocol.
1330 */
1331static void psmouse_resync(struct work_struct *work)
1332{
1333 struct psmouse *parent = NULL, *psmouse =
1334 container_of(work, struct psmouse, resync_work.work);
1335 struct serio *serio = psmouse->ps2dev.serio;
1336 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1337 bool failed = false, enabled = false;
1338 int i;
1339
1340 mutex_lock(lock: &psmouse_mutex);
1341
1342 if (psmouse->state != PSMOUSE_RESYNCING)
1343 goto out;
1344
1345 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1346 parent = psmouse_from_serio(serio: serio->parent);
1347 psmouse_deactivate(psmouse: parent);
1348 }
1349
1350 /*
1351 * Some mice don't ACK commands sent while they are in the middle of
1352 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1353 * instead of ps2_command() which would wait for 200ms for an ACK
1354 * that may never come.
1355 * As an additional quirk ALPS touchpads may not only forget to ACK
1356 * disable command but will stop reporting taps, so if we see that
1357 * mouse at least once ACKs disable we will do full reconnect if ACK
1358 * is missing.
1359 */
1360 psmouse->num_resyncs++;
1361
1362 if (ps2_sendbyte(ps2dev: &psmouse->ps2dev, PSMOUSE_CMD_DISABLE, timeout: 20)) {
1363 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1364 failed = true;
1365 } else
1366 psmouse->acks_disable_command = true;
1367
1368 /*
1369 * Poll the mouse. If it was reset the packet will be shorter than
1370 * psmouse->pktsize and ps2_command will fail. We do not expect and
1371 * do not handle scenario when mouse "upgrades" its protocol while
1372 * disconnected since it would require additional delay. If we ever
1373 * see a mouse that does it we'll adjust the code.
1374 */
1375 if (!failed) {
1376 if (psmouse->poll(psmouse))
1377 failed = true;
1378 else {
1379 psmouse_set_state(psmouse, new_state: PSMOUSE_CMD_MODE);
1380 for (i = 0; i < psmouse->pktsize; i++) {
1381 psmouse->pktcnt++;
1382 rc = psmouse->protocol_handler(psmouse);
1383 if (rc != PSMOUSE_GOOD_DATA)
1384 break;
1385 }
1386 if (rc != PSMOUSE_FULL_PACKET)
1387 failed = true;
1388 psmouse_set_state(psmouse, new_state: PSMOUSE_RESYNCING);
1389 }
1390 }
1391
1392 /*
1393 * Now try to enable mouse. We try to do that even if poll failed
1394 * and also repeat our attempts 5 times, otherwise we may be left
1395 * out with disabled mouse.
1396 */
1397 for (i = 0; i < 5; i++) {
1398 if (!ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1399 enabled = true;
1400 break;
1401 }
1402 msleep(msecs: 200);
1403 }
1404
1405 if (!enabled) {
1406 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1407 psmouse->ps2dev.serio->phys);
1408 failed = true;
1409 }
1410
1411 if (failed) {
1412 psmouse_set_state(psmouse, new_state: PSMOUSE_IGNORE);
1413 psmouse_info(psmouse,
1414 "resync failed, issuing reconnect request\n");
1415 serio_reconnect(serio);
1416 } else
1417 psmouse_set_state(psmouse, new_state: PSMOUSE_ACTIVATED);
1418
1419 if (parent)
1420 psmouse_activate(psmouse: parent);
1421 out:
1422 mutex_unlock(lock: &psmouse_mutex);
1423}
1424
1425/*
1426 * psmouse_cleanup() resets the mouse into power-on state.
1427 */
1428static void psmouse_cleanup(struct serio *serio)
1429{
1430 struct psmouse *psmouse = psmouse_from_serio(serio);
1431 struct psmouse *parent = NULL;
1432
1433 mutex_lock(lock: &psmouse_mutex);
1434
1435 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1436 parent = psmouse_from_serio(serio: serio->parent);
1437 psmouse_deactivate(psmouse: parent);
1438 }
1439
1440 psmouse_set_state(psmouse, new_state: PSMOUSE_INITIALIZING);
1441
1442 /*
1443 * Disable stream mode so cleanup routine can proceed undisturbed.
1444 */
1445 if (ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1446 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1447 psmouse->ps2dev.serio->phys);
1448
1449 if (psmouse->cleanup)
1450 psmouse->cleanup(psmouse);
1451
1452 /*
1453 * Reset the mouse to defaults (bare PS/2 protocol).
1454 */
1455 ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1456
1457 /*
1458 * Some boxes, such as HP nx7400, get terribly confused if mouse
1459 * is not fully enabled before suspending/shutting down.
1460 */
1461 ps2_command(ps2dev: &psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1462
1463 if (parent) {
1464 if (parent->pt_deactivate)
1465 parent->pt_deactivate(parent);
1466
1467 psmouse_activate(psmouse: parent);
1468 }
1469
1470 mutex_unlock(lock: &psmouse_mutex);
1471}
1472
1473/*
1474 * psmouse_disconnect() closes and frees.
1475 */
1476static void psmouse_disconnect(struct serio *serio)
1477{
1478 struct psmouse *psmouse = psmouse_from_serio(serio);
1479 struct psmouse *parent = NULL;
1480
1481 mutex_lock(lock: &psmouse_mutex);
1482
1483 psmouse_set_state(psmouse, new_state: PSMOUSE_CMD_MODE);
1484
1485 /* make sure we don't have a resync in progress */
1486 mutex_unlock(lock: &psmouse_mutex);
1487 flush_workqueue(kpsmoused_wq);
1488 mutex_lock(lock: &psmouse_mutex);
1489
1490 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1491 parent = psmouse_from_serio(serio: serio->parent);
1492 psmouse_deactivate(psmouse: parent);
1493 }
1494
1495 if (psmouse->disconnect)
1496 psmouse->disconnect(psmouse);
1497
1498 if (parent && parent->pt_deactivate)
1499 parent->pt_deactivate(parent);
1500
1501 psmouse_set_state(psmouse, new_state: PSMOUSE_IGNORE);
1502
1503 serio_close(serio);
1504 serio_set_drvdata(serio, NULL);
1505
1506 if (psmouse->dev)
1507 input_unregister_device(psmouse->dev);
1508
1509 kfree(objp: psmouse);
1510
1511 if (parent)
1512 psmouse_activate(psmouse: parent);
1513
1514 mutex_unlock(lock: &psmouse_mutex);
1515}
1516
1517static int psmouse_switch_protocol(struct psmouse *psmouse,
1518 const struct psmouse_protocol *proto)
1519{
1520 const struct psmouse_protocol *selected_proto;
1521 struct input_dev *input_dev = psmouse->dev;
1522 enum psmouse_type type;
1523
1524 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1525
1526 if (proto && (proto->detect || proto->init)) {
1527 psmouse_apply_defaults(psmouse);
1528
1529 if (proto->detect && proto->detect(psmouse, true) < 0)
1530 return -1;
1531
1532 if (proto->init && proto->init(psmouse) < 0)
1533 return -1;
1534
1535 selected_proto = proto;
1536 } else {
1537 type = psmouse_extensions(psmouse, max_proto: psmouse_max_proto, set_properties: true);
1538 selected_proto = psmouse_protocol_by_type(type);
1539 }
1540
1541 psmouse->protocol = selected_proto;
1542
1543 /*
1544 * If mouse's packet size is 3 there is no point in polling the
1545 * device in hopes to detect protocol reset - we won't get less
1546 * than 3 bytes response anyhow.
1547 */
1548 if (psmouse->pktsize == 3)
1549 psmouse->resync_time = 0;
1550
1551 /*
1552 * Some smart KVMs fake response to POLL command returning just
1553 * 3 bytes and messing up our resync logic, so if initial poll
1554 * fails we won't try polling the device anymore. Hopefully
1555 * such KVM will maintain initially selected protocol.
1556 */
1557 if (psmouse->resync_time && psmouse->poll(psmouse))
1558 psmouse->resync_time = 0;
1559
1560 snprintf(buf: psmouse->devname, size: sizeof(psmouse->devname), fmt: "%s %s %s",
1561 selected_proto->name, psmouse->vendor, psmouse->name);
1562
1563 input_dev->name = psmouse->devname;
1564 input_dev->phys = psmouse->phys;
1565 input_dev->id.bustype = BUS_I8042;
1566 input_dev->id.vendor = 0x0002;
1567 input_dev->id.product = psmouse->protocol->type;
1568 input_dev->id.version = psmouse->model;
1569
1570 return 0;
1571}
1572
1573/*
1574 * psmouse_connect() is a callback from the serio module when
1575 * an unhandled serio port is found.
1576 */
1577static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1578{
1579 struct psmouse *psmouse, *parent = NULL;
1580 struct input_dev *input_dev;
1581 int retval = 0, error = -ENOMEM;
1582
1583 mutex_lock(lock: &psmouse_mutex);
1584
1585 /*
1586 * If this is a pass-through port deactivate parent so the device
1587 * connected to this port can be successfully identified
1588 */
1589 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1590 parent = psmouse_from_serio(serio: serio->parent);
1591 psmouse_deactivate(psmouse: parent);
1592 }
1593
1594 psmouse = kzalloc(sizeof(*psmouse), GFP_KERNEL);
1595 input_dev = input_allocate_device();
1596 if (!psmouse || !input_dev)
1597 goto err_free;
1598
1599 ps2_init(ps2dev: &psmouse->ps2dev, serio,
1600 pre_receive_handler: psmouse_pre_receive_byte, receive_handler: psmouse_receive_byte);
1601 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1602 psmouse->dev = input_dev;
1603 scnprintf(buf: psmouse->phys, size: sizeof(psmouse->phys), fmt: "%s/input0", serio->phys);
1604
1605 psmouse_set_state(psmouse, new_state: PSMOUSE_INITIALIZING);
1606
1607 error = serio_open(serio, drv);
1608 if (error)
1609 goto err_clear_drvdata;
1610
1611 /* give PT device some time to settle down before probing */
1612 if (serio->id.type == SERIO_PS_PSTHRU)
1613 usleep_range(min: 10000, max: 15000);
1614
1615 if (psmouse_probe(psmouse) < 0) {
1616 error = -ENODEV;
1617 goto err_close_serio;
1618 }
1619
1620 psmouse->rate = psmouse_rate;
1621 psmouse->resolution = psmouse_resolution;
1622 psmouse->resetafter = psmouse_resetafter;
1623 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1624 psmouse->smartscroll = psmouse_smartscroll;
1625
1626 psmouse_switch_protocol(psmouse, NULL);
1627
1628 if (!psmouse->protocol->smbus_companion) {
1629 psmouse_set_state(psmouse, new_state: PSMOUSE_CMD_MODE);
1630 psmouse_initialize(psmouse);
1631
1632 error = input_register_device(input_dev);
1633 if (error)
1634 goto err_protocol_disconnect;
1635 } else {
1636 /* Smbus companion will be reporting events, not us. */
1637 input_free_device(dev: input_dev);
1638 psmouse->dev = input_dev = NULL;
1639 }
1640
1641 if (parent && parent->pt_activate)
1642 parent->pt_activate(parent);
1643
1644 /*
1645 * PS/2 devices having SMBus companions should stay disabled
1646 * on PS/2 side, in order to have SMBus part operable.
1647 */
1648 if (!psmouse->protocol->smbus_companion)
1649 psmouse_activate(psmouse);
1650
1651 out:
1652 /* If this is a pass-through port the parent needs to be re-activated */
1653 if (parent)
1654 psmouse_activate(psmouse: parent);
1655
1656 mutex_unlock(lock: &psmouse_mutex);
1657 return retval;
1658
1659 err_protocol_disconnect:
1660 if (psmouse->disconnect)
1661 psmouse->disconnect(psmouse);
1662 psmouse_set_state(psmouse, new_state: PSMOUSE_IGNORE);
1663 err_close_serio:
1664 serio_close(serio);
1665 err_clear_drvdata:
1666 serio_set_drvdata(serio, NULL);
1667 err_free:
1668 input_free_device(dev: input_dev);
1669 kfree(objp: psmouse);
1670
1671 retval = error;
1672 goto out;
1673}
1674
1675static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
1676{
1677 struct psmouse *psmouse = psmouse_from_serio(serio);
1678 struct psmouse *parent = NULL;
1679 int (*reconnect_handler)(struct psmouse *);
1680 enum psmouse_type type;
1681 int rc = -1;
1682
1683 mutex_lock(lock: &psmouse_mutex);
1684
1685 if (fast_reconnect) {
1686 reconnect_handler = psmouse->fast_reconnect;
1687 if (!reconnect_handler) {
1688 rc = -ENOENT;
1689 goto out_unlock;
1690 }
1691 } else {
1692 reconnect_handler = psmouse->reconnect;
1693 }
1694
1695 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1696 parent = psmouse_from_serio(serio: serio->parent);
1697 psmouse_deactivate(psmouse: parent);
1698 }
1699
1700 psmouse_set_state(psmouse, new_state: PSMOUSE_INITIALIZING);
1701
1702 if (reconnect_handler) {
1703 if (reconnect_handler(psmouse))
1704 goto out;
1705 } else {
1706 psmouse_reset(psmouse);
1707
1708 if (psmouse_probe(psmouse) < 0)
1709 goto out;
1710
1711 type = psmouse_extensions(psmouse, max_proto: psmouse_max_proto, set_properties: false);
1712 if (psmouse->protocol->type != type)
1713 goto out;
1714 }
1715
1716 /*
1717 * OK, the device type (and capabilities) match the old one,
1718 * we can continue using it, complete initialization
1719 */
1720 if (!psmouse->protocol->smbus_companion) {
1721 psmouse_set_state(psmouse, new_state: PSMOUSE_CMD_MODE);
1722 psmouse_initialize(psmouse);
1723 }
1724
1725 if (parent && parent->pt_activate)
1726 parent->pt_activate(parent);
1727
1728 /*
1729 * PS/2 devices having SMBus companions should stay disabled
1730 * on PS/2 side, in order to have SMBus part operable.
1731 */
1732 if (!psmouse->protocol->smbus_companion)
1733 psmouse_activate(psmouse);
1734
1735 rc = 0;
1736
1737out:
1738 /* If this is a pass-through port the parent waits to be activated */
1739 if (parent)
1740 psmouse_activate(psmouse: parent);
1741
1742out_unlock:
1743 mutex_unlock(lock: &psmouse_mutex);
1744 return rc;
1745}
1746
1747static int psmouse_reconnect(struct serio *serio)
1748{
1749 return __psmouse_reconnect(serio, fast_reconnect: false);
1750}
1751
1752static int psmouse_fast_reconnect(struct serio *serio)
1753{
1754 return __psmouse_reconnect(serio, fast_reconnect: true);
1755}
1756
1757static struct serio_device_id psmouse_serio_ids[] = {
1758 {
1759 .type = SERIO_8042,
1760 .proto = SERIO_ANY,
1761 .id = SERIO_ANY,
1762 .extra = SERIO_ANY,
1763 },
1764 {
1765 .type = SERIO_PS_PSTHRU,
1766 .proto = SERIO_ANY,
1767 .id = SERIO_ANY,
1768 .extra = SERIO_ANY,
1769 },
1770 { 0 }
1771};
1772
1773MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1774
1775static struct serio_driver psmouse_drv = {
1776 .driver = {
1777 .name = "psmouse",
1778 .dev_groups = psmouse_dev_groups,
1779 },
1780 .description = DRIVER_DESC,
1781 .id_table = psmouse_serio_ids,
1782 .interrupt = ps2_interrupt,
1783 .connect = psmouse_connect,
1784 .reconnect = psmouse_reconnect,
1785 .fast_reconnect = psmouse_fast_reconnect,
1786 .disconnect = psmouse_disconnect,
1787 .cleanup = psmouse_cleanup,
1788};
1789
1790ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1791 char *buf)
1792{
1793 struct serio *serio = to_serio_port(dev);
1794 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1795 struct psmouse *psmouse = psmouse_from_serio(serio);
1796
1797 if (psmouse->protocol->smbus_companion &&
1798 devattr != &psmouse_attr_protocol.dattr)
1799 return -ENOENT;
1800
1801 return attr->show(psmouse, attr->data, buf);
1802}
1803
1804ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1805 const char *buf, size_t count)
1806{
1807 struct serio *serio = to_serio_port(dev);
1808 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1809 struct psmouse *psmouse, *parent = NULL;
1810 int retval;
1811
1812 retval = mutex_lock_interruptible(lock: &psmouse_mutex);
1813 if (retval)
1814 goto out;
1815
1816 psmouse = psmouse_from_serio(serio);
1817
1818 if (psmouse->protocol->smbus_companion &&
1819 devattr != &psmouse_attr_protocol.dattr) {
1820 retval = -ENOENT;
1821 goto out_unlock;
1822 }
1823
1824 if (attr->protect) {
1825 if (psmouse->state == PSMOUSE_IGNORE) {
1826 retval = -ENODEV;
1827 goto out_unlock;
1828 }
1829
1830 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1831 parent = psmouse_from_serio(serio: serio->parent);
1832 psmouse_deactivate(psmouse: parent);
1833 }
1834
1835 if (!psmouse->protocol->smbus_companion)
1836 psmouse_deactivate(psmouse);
1837 }
1838
1839 retval = attr->set(psmouse, attr->data, buf, count);
1840
1841 if (attr->protect) {
1842 if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
1843 psmouse_activate(psmouse);
1844
1845 if (parent)
1846 psmouse_activate(psmouse: parent);
1847 }
1848
1849 out_unlock:
1850 mutex_unlock(lock: &psmouse_mutex);
1851 out:
1852 return retval;
1853}
1854
1855static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1856{
1857 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1858
1859 return sprintf(buf, fmt: "%u\n", *field);
1860}
1861
1862static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1863{
1864 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1865 unsigned int value;
1866 int err;
1867
1868 err = kstrtouint(s: buf, base: 10, res: &value);
1869 if (err)
1870 return err;
1871
1872 *field = value;
1873
1874 return count;
1875}
1876
1877static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1878{
1879 return sprintf(buf, fmt: "%s\n", psmouse->protocol->name);
1880}
1881
1882static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1883{
1884 struct serio *serio = psmouse->ps2dev.serio;
1885 struct psmouse *parent = NULL;
1886 struct input_dev *old_dev, *new_dev;
1887 const struct psmouse_protocol *proto, *old_proto;
1888 int error;
1889 int retry = 0;
1890
1891 proto = psmouse_protocol_by_name(name: buf, len: count);
1892 if (!proto)
1893 return -EINVAL;
1894
1895 if (psmouse->protocol == proto)
1896 return count;
1897
1898 new_dev = input_allocate_device();
1899 if (!new_dev)
1900 return -ENOMEM;
1901
1902 while (!list_empty(head: &serio->children)) {
1903 if (++retry > 3) {
1904 psmouse_warn(psmouse,
1905 "failed to destroy children ports, protocol change aborted.\n");
1906 input_free_device(dev: new_dev);
1907 return -EIO;
1908 }
1909
1910 mutex_unlock(lock: &psmouse_mutex);
1911 serio_unregister_child_port(serio);
1912 mutex_lock(lock: &psmouse_mutex);
1913
1914 if (serio->drv != &psmouse_drv) {
1915 input_free_device(dev: new_dev);
1916 return -ENODEV;
1917 }
1918
1919 if (psmouse->protocol == proto) {
1920 input_free_device(dev: new_dev);
1921 return count; /* switched by other thread */
1922 }
1923 }
1924
1925 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1926 parent = psmouse_from_serio(serio: serio->parent);
1927 if (parent->pt_deactivate)
1928 parent->pt_deactivate(parent);
1929 }
1930
1931 old_dev = psmouse->dev;
1932 old_proto = psmouse->protocol;
1933
1934 if (psmouse->disconnect)
1935 psmouse->disconnect(psmouse);
1936
1937 psmouse_set_state(psmouse, new_state: PSMOUSE_IGNORE);
1938
1939 psmouse->dev = new_dev;
1940 psmouse_set_state(psmouse, new_state: PSMOUSE_INITIALIZING);
1941
1942 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1943 psmouse_reset(psmouse);
1944 /* default to PSMOUSE_PS2 */
1945 psmouse_switch_protocol(psmouse, proto: &psmouse_protocols[0]);
1946 }
1947
1948 psmouse_initialize(psmouse);
1949 psmouse_set_state(psmouse, new_state: PSMOUSE_CMD_MODE);
1950
1951 if (psmouse->protocol->smbus_companion) {
1952 input_free_device(dev: psmouse->dev);
1953 psmouse->dev = NULL;
1954 } else {
1955 error = input_register_device(psmouse->dev);
1956 if (error) {
1957 if (psmouse->disconnect)
1958 psmouse->disconnect(psmouse);
1959
1960 psmouse_set_state(psmouse, new_state: PSMOUSE_IGNORE);
1961 input_free_device(dev: new_dev);
1962 psmouse->dev = old_dev;
1963 psmouse_set_state(psmouse, new_state: PSMOUSE_INITIALIZING);
1964 psmouse_switch_protocol(psmouse, proto: old_proto);
1965 psmouse_initialize(psmouse);
1966 psmouse_set_state(psmouse, new_state: PSMOUSE_CMD_MODE);
1967
1968 return error;
1969 }
1970 }
1971
1972 if (old_dev)
1973 input_unregister_device(old_dev);
1974
1975 if (parent && parent->pt_activate)
1976 parent->pt_activate(parent);
1977
1978 return count;
1979}
1980
1981static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1982{
1983 unsigned int value;
1984 int err;
1985
1986 err = kstrtouint(s: buf, base: 10, res: &value);
1987 if (err)
1988 return err;
1989
1990 psmouse->set_rate(psmouse, value);
1991 return count;
1992}
1993
1994static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1995{
1996 unsigned int value;
1997 int err;
1998
1999 err = kstrtouint(s: buf, base: 10, res: &value);
2000 if (err)
2001 return err;
2002
2003 psmouse->set_resolution(psmouse, value);
2004 return count;
2005}
2006
2007
2008static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
2009{
2010 const struct psmouse_protocol *proto;
2011
2012 if (!val)
2013 return -EINVAL;
2014
2015 proto = psmouse_protocol_by_name(name: val, len: strlen(val));
2016
2017 if (!proto || !proto->maxproto)
2018 return -EINVAL;
2019
2020 *((unsigned int *)kp->arg) = proto->type;
2021
2022 return 0;
2023}
2024
2025static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
2026{
2027 int type = *((unsigned int *)kp->arg);
2028
2029 return sprintf(buf: buffer, fmt: "%s\n", psmouse_protocol_by_type(type)->name);
2030}
2031
2032static int __init psmouse_init(void)
2033{
2034 int err;
2035
2036 lifebook_module_init();
2037 synaptics_module_init();
2038 hgpk_module_init();
2039
2040 err = psmouse_smbus_module_init();
2041 if (err)
2042 return err;
2043
2044 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
2045 if (!kpsmoused_wq) {
2046 pr_err("failed to create kpsmoused workqueue\n");
2047 err = -ENOMEM;
2048 goto err_smbus_exit;
2049 }
2050
2051 err = serio_register_driver(&psmouse_drv);
2052 if (err)
2053 goto err_destroy_wq;
2054
2055 return 0;
2056
2057err_destroy_wq:
2058 destroy_workqueue(wq: kpsmoused_wq);
2059err_smbus_exit:
2060 psmouse_smbus_module_exit();
2061 return err;
2062}
2063
2064static void __exit psmouse_exit(void)
2065{
2066 serio_unregister_driver(drv: &psmouse_drv);
2067 destroy_workqueue(wq: kpsmoused_wq);
2068 psmouse_smbus_module_exit();
2069}
2070
2071module_init(psmouse_init);
2072module_exit(psmouse_exit);
2073