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
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 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)
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 = true;
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 bool psmouse_a4tech_2wheels;
70 module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644);
71 MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default).");
72
73 static unsigned int psmouse_resetafter = 5;
74 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
75 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
76
77 static unsigned int psmouse_resync_time;
78 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
79 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
80
81 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
82 NULL,
83 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
84 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
85 (void *) offsetof(struct psmouse, rate),
86 psmouse_show_int_attr, psmouse_attr_set_rate);
87 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
88 (void *) offsetof(struct psmouse, resolution),
89 psmouse_show_int_attr, psmouse_attr_set_resolution);
90 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
91 (void *) offsetof(struct psmouse, resetafter),
92 psmouse_show_int_attr, psmouse_set_int_attr);
93 PSMOUSE_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
97 static 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
106 ATTRIBUTE_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 */
115 static DEFINE_MUTEX(psmouse_mutex);
116
117 static struct workqueue_struct *kpsmoused_wq;
118
psmouse_report_standard_buttons(struct input_dev * dev,u8 buttons)119 void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
120 {
121 input_report_key(dev, BTN_LEFT, buttons & BIT(0));
122 input_report_key(dev, BTN_MIDDLE, buttons & BIT(2));
123 input_report_key(dev, BTN_RIGHT, buttons & BIT(1));
124 }
125
psmouse_report_standard_motion(struct input_dev * dev,u8 * packet)126 void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
127 {
128 int x, y;
129
130 x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
131 y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
132
133 input_report_rel(dev, REL_X, x);
134 input_report_rel(dev, REL_Y, -y);
135 }
136
psmouse_report_standard_packet(struct input_dev * dev,u8 * packet)137 void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
138 {
139 psmouse_report_standard_buttons(dev, packet[0]);
140 psmouse_report_standard_motion(dev, packet);
141 }
142
143 /*
144 * psmouse_process_byte() analyzes the PS/2 data stream and reports
145 * relevant events to the input module once full packet has arrived.
146 */
psmouse_process_byte(struct psmouse * psmouse)147 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
148 {
149 struct input_dev *dev = psmouse->dev;
150 u8 *packet = psmouse->packet;
151 int wheel;
152
153 if (psmouse->pktcnt < psmouse->pktsize)
154 return PSMOUSE_GOOD_DATA;
155
156 /* Full packet accumulated, process it */
157
158 switch (psmouse->protocol->type) {
159 case PSMOUSE_IMPS:
160 /* IntelliMouse has scroll wheel */
161 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
162 break;
163
164 case PSMOUSE_IMEX:
165 /* Scroll wheel and buttons on IntelliMouse Explorer */
166 switch (packet[3] & 0xC0) {
167 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
168 input_report_rel(dev, REL_WHEEL,
169 -sign_extend32(packet[3], 5));
170 break;
171 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
172 input_report_rel(dev, REL_HWHEEL,
173 -sign_extend32(packet[3], 5));
174 break;
175 case 0x00:
176 case 0xC0:
177 wheel = sign_extend32(packet[3], 3);
178
179 /*
180 * Some A4Tech mice have two scroll wheels, with first
181 * one reporting +/-1 in the lower nibble, and second
182 * one reporting +/-2.
183 */
184 if (psmouse_a4tech_2wheels && abs(wheel) > 1)
185 input_report_rel(dev, REL_HWHEEL, wheel / 2);
186 else
187 input_report_rel(dev, REL_WHEEL, -wheel);
188
189 input_report_key(dev, BTN_SIDE, packet[3] & BIT(4));
190 input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5));
191 break;
192 }
193 break;
194
195 case PSMOUSE_GENPS:
196 /* Report scroll buttons on NetMice */
197 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
198
199 /* Extra buttons on Genius NewNet 3D */
200 input_report_key(dev, BTN_SIDE, packet[0] & BIT(6));
201 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7));
202 break;
203
204 case PSMOUSE_THINKPS:
205 /* Extra button on ThinkingMouse */
206 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3));
207
208 /*
209 * Without this bit of weirdness moving up gives wildly
210 * high Y changes.
211 */
212 packet[1] |= (packet[0] & 0x40) << 1;
213 break;
214
215 case PSMOUSE_CORTRON:
216 /*
217 * Cortron PS2 Trackball reports SIDE button in the
218 * 4th bit of the first byte.
219 */
220 input_report_key(dev, BTN_SIDE, packet[0] & BIT(3));
221 packet[0] |= BIT(3);
222 break;
223
224 default:
225 break;
226 }
227
228 /* Generic PS/2 Mouse */
229 packet[0] |= psmouse->extra_buttons;
230 psmouse_report_standard_packet(dev, packet);
231
232 input_sync(dev);
233
234 return PSMOUSE_FULL_PACKET;
235 }
236
psmouse_queue_work(struct psmouse * psmouse,struct delayed_work * work,unsigned long delay)237 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
238 unsigned long delay)
239 {
240 queue_delayed_work(kpsmoused_wq, work, delay);
241 }
242
243 /*
244 * __psmouse_set_state() sets new psmouse state and resets all flags.
245 */
__psmouse_set_state(struct psmouse * psmouse,enum psmouse_state new_state)246 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
247 {
248 psmouse->state = new_state;
249 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
250 psmouse->ps2dev.flags = 0;
251 psmouse->last = jiffies;
252 }
253
254 /*
255 * psmouse_set_state() sets new psmouse state and resets all flags and
256 * counters while holding serio lock so fighting with interrupt handler
257 * is not a concern.
258 */
psmouse_set_state(struct psmouse * psmouse,enum psmouse_state new_state)259 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
260 {
261 serio_pause_rx(psmouse->ps2dev.serio);
262 __psmouse_set_state(psmouse, new_state);
263 serio_continue_rx(psmouse->ps2dev.serio);
264 }
265
266 /*
267 * psmouse_handle_byte() processes one byte of the input data stream
268 * by calling corresponding protocol handler.
269 */
psmouse_handle_byte(struct psmouse * psmouse)270 static int psmouse_handle_byte(struct psmouse *psmouse)
271 {
272 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
273
274 switch (rc) {
275 case PSMOUSE_BAD_DATA:
276 if (psmouse->state == PSMOUSE_ACTIVATED) {
277 psmouse_warn(psmouse,
278 "%s at %s lost sync at byte %d\n",
279 psmouse->name, psmouse->phys,
280 psmouse->pktcnt);
281 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
282 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
283 psmouse_notice(psmouse,
284 "issuing reconnect request\n");
285 serio_reconnect(psmouse->ps2dev.serio);
286 return -EIO;
287 }
288 }
289 psmouse->pktcnt = 0;
290 break;
291
292 case PSMOUSE_FULL_PACKET:
293 psmouse->pktcnt = 0;
294 if (psmouse->out_of_sync_cnt) {
295 psmouse->out_of_sync_cnt = 0;
296 psmouse_notice(psmouse,
297 "%s at %s - driver resynced.\n",
298 psmouse->name, psmouse->phys);
299 }
300 break;
301
302 case PSMOUSE_GOOD_DATA:
303 break;
304 }
305 return 0;
306 }
307
psmouse_handle_oob_data(struct psmouse * psmouse,u8 data)308 static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
309 {
310 switch (psmouse->oob_data_type) {
311 case PSMOUSE_OOB_NONE:
312 psmouse->oob_data_type = data;
313 break;
314
315 case PSMOUSE_OOB_EXTRA_BTNS:
316 psmouse_report_standard_buttons(psmouse->dev, data);
317 input_sync(psmouse->dev);
318
319 psmouse->extra_buttons = data;
320 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
321 break;
322
323 default:
324 psmouse_warn(psmouse,
325 "unknown OOB_DATA type: 0x%02x\n",
326 psmouse->oob_data_type);
327 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
328 break;
329 }
330 }
331
332 /*
333 * psmouse_interrupt() handles incoming characters, either passing them
334 * for normal processing or gathering them as command response.
335 */
psmouse_interrupt(struct serio * serio,u8 data,unsigned int flags)336 static irqreturn_t psmouse_interrupt(struct serio *serio,
337 u8 data, unsigned int flags)
338 {
339 struct psmouse *psmouse = serio_get_drvdata(serio);
340
341 if (psmouse->state == PSMOUSE_IGNORE)
342 goto out;
343
344 if (unlikely((flags & SERIO_TIMEOUT) ||
345 ((flags & SERIO_PARITY) &&
346 !psmouse->protocol->ignore_parity))) {
347
348 if (psmouse->state == PSMOUSE_ACTIVATED)
349 psmouse_warn(psmouse,
350 "bad data from KBC -%s%s\n",
351 flags & SERIO_TIMEOUT ? " timeout" : "",
352 flags & SERIO_PARITY ? " bad parity" : "");
353 ps2_cmd_aborted(&psmouse->ps2dev);
354 goto out;
355 }
356
357 if (flags & SERIO_OOB_DATA) {
358 psmouse_handle_oob_data(psmouse, data);
359 goto out;
360 }
361
362 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
363 if (ps2_handle_ack(&psmouse->ps2dev, data))
364 goto out;
365
366 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
367 if (ps2_handle_response(&psmouse->ps2dev, data))
368 goto out;
369
370 pm_wakeup_event(&serio->dev, 0);
371
372 if (psmouse->state <= PSMOUSE_RESYNCING)
373 goto out;
374
375 if (psmouse->state == PSMOUSE_ACTIVATED &&
376 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
377 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
378 psmouse->name, psmouse->phys, psmouse->pktcnt);
379 psmouse->badbyte = psmouse->packet[0];
380 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
381 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
382 goto out;
383 }
384
385 psmouse->packet[psmouse->pktcnt++] = data;
386
387 /* Check if this is a new device announcement (0xAA 0x00) */
388 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
389 if (psmouse->pktcnt == 1) {
390 psmouse->last = jiffies;
391 goto out;
392 }
393
394 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
395 (psmouse->protocol->type == PSMOUSE_HGPK &&
396 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
397 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
398 serio_reconnect(serio);
399 goto out;
400 }
401
402 /* Not a new device, try processing first byte normally */
403 psmouse->pktcnt = 1;
404 if (psmouse_handle_byte(psmouse))
405 goto out;
406
407 psmouse->packet[psmouse->pktcnt++] = data;
408 }
409
410 /*
411 * See if we need to force resync because mouse was idle for
412 * too long.
413 */
414 if (psmouse->state == PSMOUSE_ACTIVATED &&
415 psmouse->pktcnt == 1 && psmouse->resync_time &&
416 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
417 psmouse->badbyte = psmouse->packet[0];
418 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
419 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
420 goto out;
421 }
422
423 psmouse->last = jiffies;
424 psmouse_handle_byte(psmouse);
425
426 out:
427 return IRQ_HANDLED;
428 }
429
430 /*
431 * psmouse_reset() resets the mouse into power-on state.
432 */
psmouse_reset(struct psmouse * psmouse)433 int psmouse_reset(struct psmouse *psmouse)
434 {
435 u8 param[2];
436 int error;
437
438 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
439 if (error)
440 return error;
441
442 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
443 return -EIO;
444
445 return 0;
446 }
447
448 /*
449 * Here we set the mouse resolution.
450 */
psmouse_set_resolution(struct psmouse * psmouse,unsigned int resolution)451 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
452 {
453 static const u8 params[] = { 0, 1, 2, 2, 3 };
454 u8 p;
455
456 if (resolution == 0 || resolution > 200)
457 resolution = 200;
458
459 p = params[resolution / 50];
460 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
461 psmouse->resolution = 25 << p;
462 }
463
464 /*
465 * Here we set the mouse report rate.
466 */
psmouse_set_rate(struct psmouse * psmouse,unsigned int rate)467 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
468 {
469 static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
470 u8 r;
471 int i = 0;
472
473 while (rates[i] > rate)
474 i++;
475 r = rates[i];
476 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
477 psmouse->rate = r;
478 }
479
480 /*
481 * Here we set the mouse scaling.
482 */
psmouse_set_scale(struct psmouse * psmouse,enum psmouse_scale scale)483 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
484 {
485 ps2_command(&psmouse->ps2dev, NULL,
486 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
487 PSMOUSE_CMD_SETSCALE11);
488 }
489
490 /*
491 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
492 */
psmouse_poll(struct psmouse * psmouse)493 static int psmouse_poll(struct psmouse *psmouse)
494 {
495 return ps2_command(&psmouse->ps2dev, psmouse->packet,
496 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
497 }
498
psmouse_check_pnp_id(const char * id,const char * const ids[])499 static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
500 {
501 int i;
502
503 for (i = 0; ids[i]; i++)
504 if (!strcasecmp(id, ids[i]))
505 return true;
506
507 return false;
508 }
509
510 /*
511 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
512 */
psmouse_matches_pnp_id(struct psmouse * psmouse,const char * const ids[])513 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
514 {
515 struct serio *serio = psmouse->ps2dev.serio;
516 char *p, *fw_id_copy, *save_ptr;
517 bool found = false;
518
519 if (strncmp(serio->firmware_id, "PNP: ", 5))
520 return false;
521
522 fw_id_copy = kstrndup(&serio->firmware_id[5],
523 sizeof(serio->firmware_id) - 5,
524 GFP_KERNEL);
525 if (!fw_id_copy)
526 return false;
527
528 save_ptr = fw_id_copy;
529 while ((p = strsep(&fw_id_copy, " ")) != NULL) {
530 if (psmouse_check_pnp_id(p, ids)) {
531 found = true;
532 break;
533 }
534 }
535
536 kfree(save_ptr);
537 return found;
538 }
539
540 /*
541 * Genius NetMouse magic init.
542 */
genius_detect(struct psmouse * psmouse,bool set_properties)543 static int genius_detect(struct psmouse *psmouse, bool set_properties)
544 {
545 struct ps2dev *ps2dev = &psmouse->ps2dev;
546 u8 param[4];
547
548 param[0] = 3;
549 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
550 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
551 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
552 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
553 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
554
555 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
556 return -ENODEV;
557
558 if (set_properties) {
559 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
560 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
561 __set_bit(BTN_SIDE, psmouse->dev->keybit);
562 __set_bit(REL_WHEEL, psmouse->dev->relbit);
563
564 psmouse->vendor = "Genius";
565 psmouse->name = "Mouse";
566 psmouse->pktsize = 4;
567 }
568
569 return 0;
570 }
571
572 /*
573 * IntelliMouse magic init.
574 */
intellimouse_detect(struct psmouse * psmouse,bool set_properties)575 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
576 {
577 struct ps2dev *ps2dev = &psmouse->ps2dev;
578 u8 param[2];
579
580 param[0] = 200;
581 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
582 param[0] = 100;
583 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
584 param[0] = 80;
585 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
586 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
587
588 if (param[0] != 3)
589 return -ENODEV;
590
591 if (set_properties) {
592 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
593 __set_bit(REL_WHEEL, psmouse->dev->relbit);
594
595 if (!psmouse->vendor)
596 psmouse->vendor = "Generic";
597 if (!psmouse->name)
598 psmouse->name = "Wheel Mouse";
599 psmouse->pktsize = 4;
600 }
601
602 return 0;
603 }
604
605 /*
606 * Try IntelliMouse/Explorer magic init.
607 */
im_explorer_detect(struct psmouse * psmouse,bool set_properties)608 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
609 {
610 struct ps2dev *ps2dev = &psmouse->ps2dev;
611 u8 param[2];
612
613 intellimouse_detect(psmouse, 0);
614
615 param[0] = 200;
616 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
617 param[0] = 200;
618 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
619 param[0] = 80;
620 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
621 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
622
623 if (param[0] != 4)
624 return -ENODEV;
625
626 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
627 param[0] = 200;
628 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
629 param[0] = 80;
630 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
631 param[0] = 40;
632 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
633
634 if (set_properties) {
635 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
636 __set_bit(REL_WHEEL, psmouse->dev->relbit);
637 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
638 __set_bit(BTN_SIDE, psmouse->dev->keybit);
639 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
640
641 if (!psmouse->vendor)
642 psmouse->vendor = "Generic";
643 if (!psmouse->name)
644 psmouse->name = "Explorer Mouse";
645 psmouse->pktsize = 4;
646 }
647
648 return 0;
649 }
650
651 /*
652 * Kensington ThinkingMouse / ExpertMouse magic init.
653 */
thinking_detect(struct psmouse * psmouse,bool set_properties)654 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
655 {
656 struct ps2dev *ps2dev = &psmouse->ps2dev;
657 u8 param[2];
658 static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
659 int i;
660
661 param[0] = 10;
662 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
663 param[0] = 0;
664 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
665 for (i = 0; i < ARRAY_SIZE(seq); i++) {
666 param[0] = seq[i];
667 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
668 }
669 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
670
671 if (param[0] != 2)
672 return -ENODEV;
673
674 if (set_properties) {
675 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
676 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
677
678 psmouse->vendor = "Kensington";
679 psmouse->name = "ThinkingMouse";
680 }
681
682 return 0;
683 }
684
685 /*
686 * Bare PS/2 protocol "detection". Always succeeds.
687 */
ps2bare_detect(struct psmouse * psmouse,bool set_properties)688 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
689 {
690 if (set_properties) {
691 if (!psmouse->vendor)
692 psmouse->vendor = "Generic";
693 if (!psmouse->name)
694 psmouse->name = "Mouse";
695
696 /*
697 * We have no way of figuring true number of buttons so let's
698 * assume that the device has 3.
699 */
700 input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
701 }
702
703 return 0;
704 }
705
706 /*
707 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
708 * must be forced by sysfs protocol writing.
709 */
cortron_detect(struct psmouse * psmouse,bool set_properties)710 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
711 {
712 if (set_properties) {
713 psmouse->vendor = "Cortron";
714 psmouse->name = "PS/2 Trackball";
715
716 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
717 __set_bit(BTN_SIDE, psmouse->dev->keybit);
718 }
719
720 return 0;
721 }
722
723 static const struct psmouse_protocol psmouse_protocols[] = {
724 {
725 .type = PSMOUSE_PS2,
726 .name = "PS/2",
727 .alias = "bare",
728 .maxproto = true,
729 .ignore_parity = true,
730 .detect = ps2bare_detect,
731 .try_passthru = true,
732 },
733 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
734 {
735 .type = PSMOUSE_PS2PP,
736 .name = "PS2++",
737 .alias = "logitech",
738 .detect = ps2pp_detect,
739 },
740 #endif
741 {
742 .type = PSMOUSE_THINKPS,
743 .name = "ThinkPS/2",
744 .alias = "thinkps",
745 .detect = thinking_detect,
746 },
747 #ifdef CONFIG_MOUSE_PS2_CYPRESS
748 {
749 .type = PSMOUSE_CYPRESS,
750 .name = "CyPS/2",
751 .alias = "cypress",
752 .detect = cypress_detect,
753 .init = cypress_init,
754 },
755 #endif
756 {
757 .type = PSMOUSE_GENPS,
758 .name = "GenPS/2",
759 .alias = "genius",
760 .detect = genius_detect,
761 },
762 {
763 .type = PSMOUSE_IMPS,
764 .name = "ImPS/2",
765 .alias = "imps",
766 .maxproto = true,
767 .ignore_parity = true,
768 .detect = intellimouse_detect,
769 .try_passthru = true,
770 },
771 {
772 .type = PSMOUSE_IMEX,
773 .name = "ImExPS/2",
774 .alias = "exps",
775 .maxproto = true,
776 .ignore_parity = true,
777 .detect = im_explorer_detect,
778 .try_passthru = true,
779 },
780 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
781 {
782 .type = PSMOUSE_SYNAPTICS,
783 .name = "SynPS/2",
784 .alias = "synaptics",
785 .detect = synaptics_detect,
786 .init = synaptics_init_absolute,
787 },
788 {
789 .type = PSMOUSE_SYNAPTICS_RELATIVE,
790 .name = "SynRelPS/2",
791 .alias = "synaptics-relative",
792 .detect = synaptics_detect,
793 .init = synaptics_init_relative,
794 },
795 #endif
796 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
797 {
798 .type = PSMOUSE_SYNAPTICS_SMBUS,
799 .name = "SynSMBus",
800 .alias = "synaptics-smbus",
801 .detect = synaptics_detect,
802 .init = synaptics_init_smbus,
803 .smbus_companion = true,
804 },
805 #endif
806 #ifdef CONFIG_MOUSE_PS2_ALPS
807 {
808 .type = PSMOUSE_ALPS,
809 .name = "AlpsPS/2",
810 .alias = "alps",
811 .detect = alps_detect,
812 .init = alps_init,
813 },
814 #endif
815 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
816 {
817 .type = PSMOUSE_LIFEBOOK,
818 .name = "LBPS/2",
819 .alias = "lifebook",
820 .detect = lifebook_detect,
821 .init = lifebook_init,
822 },
823 #endif
824 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
825 {
826 .type = PSMOUSE_TRACKPOINT,
827 .name = "TPPS/2",
828 .alias = "trackpoint",
829 .detect = trackpoint_detect,
830 .try_passthru = true,
831 },
832 #endif
833 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
834 {
835 .type = PSMOUSE_TOUCHKIT_PS2,
836 .name = "touchkitPS/2",
837 .alias = "touchkit",
838 .detect = touchkit_ps2_detect,
839 },
840 #endif
841 #ifdef CONFIG_MOUSE_PS2_OLPC
842 {
843 .type = PSMOUSE_HGPK,
844 .name = "OLPC HGPK",
845 .alias = "hgpk",
846 .detect = hgpk_detect,
847 },
848 #endif
849 #ifdef CONFIG_MOUSE_PS2_ELANTECH
850 {
851 .type = PSMOUSE_ELANTECH,
852 .name = "ETPS/2",
853 .alias = "elantech",
854 .detect = elantech_detect,
855 .init = elantech_init_ps2,
856 },
857 #endif
858 #ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
859 {
860 .type = PSMOUSE_ELANTECH_SMBUS,
861 .name = "ETSMBus",
862 .alias = "elantech-smbus",
863 .detect = elantech_detect,
864 .init = elantech_init_smbus,
865 .smbus_companion = true,
866 },
867 #endif
868 #ifdef CONFIG_MOUSE_PS2_SENTELIC
869 {
870 .type = PSMOUSE_FSP,
871 .name = "FSPPS/2",
872 .alias = "fsp",
873 .detect = fsp_detect,
874 .init = fsp_init,
875 },
876 #endif
877 {
878 .type = PSMOUSE_CORTRON,
879 .name = "CortronPS/2",
880 .alias = "cortps",
881 .detect = cortron_detect,
882 },
883 #ifdef CONFIG_MOUSE_PS2_FOCALTECH
884 {
885 .type = PSMOUSE_FOCALTECH,
886 .name = "FocalTechPS/2",
887 .alias = "focaltech",
888 .detect = focaltech_detect,
889 .init = focaltech_init,
890 },
891 #endif
892 #ifdef CONFIG_MOUSE_PS2_VMMOUSE
893 {
894 .type = PSMOUSE_VMMOUSE,
895 .name = VMMOUSE_PSNAME,
896 .alias = "vmmouse",
897 .detect = vmmouse_detect,
898 .init = vmmouse_init,
899 },
900 #endif
901 #ifdef CONFIG_MOUSE_PS2_BYD
902 {
903 .type = PSMOUSE_BYD,
904 .name = "BYDPS/2",
905 .alias = "byd",
906 .detect = byd_detect,
907 .init = byd_init,
908 },
909 #endif
910 {
911 .type = PSMOUSE_AUTO,
912 .name = "auto",
913 .alias = "any",
914 .maxproto = true,
915 },
916 };
917
__psmouse_protocol_by_type(enum psmouse_type type)918 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
919 {
920 int i;
921
922 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
923 if (psmouse_protocols[i].type == type)
924 return &psmouse_protocols[i];
925
926 return NULL;
927 }
928
psmouse_protocol_by_type(enum psmouse_type type)929 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
930 {
931 const struct psmouse_protocol *proto;
932
933 proto = __psmouse_protocol_by_type(type);
934 if (proto)
935 return proto;
936
937 WARN_ON(1);
938 return &psmouse_protocols[0];
939 }
940
psmouse_protocol_by_name(const char * name,size_t len)941 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
942 {
943 const struct psmouse_protocol *p;
944 int i;
945
946 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
947 p = &psmouse_protocols[i];
948
949 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
950 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
951 return &psmouse_protocols[i];
952 }
953
954 return NULL;
955 }
956
957 /*
958 * Apply default settings to the psmouse structure. Most of them will
959 * be overridden by individual protocol initialization routines.
960 */
psmouse_apply_defaults(struct psmouse * psmouse)961 static void psmouse_apply_defaults(struct psmouse *psmouse)
962 {
963 struct input_dev *input_dev = psmouse->dev;
964
965 bitmap_zero(input_dev->evbit, EV_CNT);
966 bitmap_zero(input_dev->keybit, KEY_CNT);
967 bitmap_zero(input_dev->relbit, REL_CNT);
968 bitmap_zero(input_dev->absbit, ABS_CNT);
969 bitmap_zero(input_dev->mscbit, MSC_CNT);
970
971 input_set_capability(input_dev, EV_KEY, BTN_LEFT);
972 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
973
974 input_set_capability(input_dev, EV_REL, REL_X);
975 input_set_capability(input_dev, EV_REL, REL_Y);
976
977 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
978
979 psmouse->protocol = &psmouse_protocols[0];
980
981 psmouse->set_rate = psmouse_set_rate;
982 psmouse->set_resolution = psmouse_set_resolution;
983 psmouse->set_scale = psmouse_set_scale;
984 psmouse->poll = psmouse_poll;
985 psmouse->protocol_handler = psmouse_process_byte;
986 psmouse->pktsize = 3;
987 psmouse->reconnect = NULL;
988 psmouse->fast_reconnect = NULL;
989 psmouse->disconnect = NULL;
990 psmouse->cleanup = NULL;
991 psmouse->pt_activate = NULL;
992 psmouse->pt_deactivate = NULL;
993 }
994
psmouse_do_detect(int (* detect)(struct psmouse *,bool),struct psmouse * psmouse,bool allow_passthrough,bool set_properties)995 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
996 struct psmouse *psmouse, bool allow_passthrough,
997 bool set_properties)
998 {
999 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
1000 !allow_passthrough) {
1001 return false;
1002 }
1003
1004 if (set_properties)
1005 psmouse_apply_defaults(psmouse);
1006
1007 return detect(psmouse, set_properties) == 0;
1008 }
1009
psmouse_try_protocol(struct psmouse * psmouse,enum psmouse_type type,unsigned int * max_proto,bool set_properties,bool init_allowed)1010 static bool psmouse_try_protocol(struct psmouse *psmouse,
1011 enum psmouse_type type,
1012 unsigned int *max_proto,
1013 bool set_properties, bool init_allowed)
1014 {
1015 const struct psmouse_protocol *proto;
1016
1017 proto = __psmouse_protocol_by_type(type);
1018 if (!proto)
1019 return false;
1020
1021 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
1022 set_properties))
1023 return false;
1024
1025 if (set_properties && proto->init && init_allowed) {
1026 if (proto->init(psmouse) != 0) {
1027 /*
1028 * We detected device, but init failed. Adjust
1029 * max_proto so we only try standard protocols.
1030 */
1031 if (*max_proto > PSMOUSE_IMEX)
1032 *max_proto = PSMOUSE_IMEX;
1033
1034 return false;
1035 }
1036 }
1037
1038 return true;
1039 }
1040
1041 /*
1042 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
1043 * the mouse may have.
1044 */
psmouse_extensions(struct psmouse * psmouse,unsigned int max_proto,bool set_properties)1045 static int psmouse_extensions(struct psmouse *psmouse,
1046 unsigned int max_proto, bool set_properties)
1047 {
1048 bool synaptics_hardware = false;
1049 int ret;
1050
1051 /*
1052 * Always check for focaltech, this is safe as it uses pnp-id
1053 * matching.
1054 */
1055 if (psmouse_do_detect(focaltech_detect,
1056 psmouse, false, set_properties)) {
1057 if (max_proto > PSMOUSE_IMEX &&
1058 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
1059 (!set_properties || focaltech_init(psmouse) == 0)) {
1060 return PSMOUSE_FOCALTECH;
1061 }
1062 /*
1063 * Restrict psmouse_max_proto so that psmouse_initialize()
1064 * does not try to reset rate and resolution, because even
1065 * that upsets the device.
1066 * This also causes us to basically fall through to basic
1067 * protocol detection, where we fully reset the mouse,
1068 * and set it up as bare PS/2 protocol device.
1069 */
1070 psmouse_max_proto = max_proto = PSMOUSE_PS2;
1071 }
1072
1073 /*
1074 * We always check for LifeBook because it does not disturb mouse
1075 * (it only checks DMI information).
1076 */
1077 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
1078 set_properties, max_proto > PSMOUSE_IMEX))
1079 return PSMOUSE_LIFEBOOK;
1080
1081 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
1082 set_properties, max_proto > PSMOUSE_IMEX))
1083 return PSMOUSE_VMMOUSE;
1084
1085 /*
1086 * Try Kensington ThinkingMouse (we try first, because Synaptics
1087 * probe upsets the ThinkingMouse).
1088 */
1089 if (max_proto > PSMOUSE_IMEX &&
1090 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
1091 set_properties, true)) {
1092 return PSMOUSE_THINKPS;
1093 }
1094
1095 /*
1096 * Try Synaptics TouchPad. Note that probing is done even if
1097 * Synaptics protocol support is disabled in config - we need to
1098 * know if it is Synaptics so we can reset it properly after
1099 * probing for IntelliMouse.
1100 */
1101 if (max_proto > PSMOUSE_PS2 &&
1102 psmouse_do_detect(synaptics_detect,
1103 psmouse, false, set_properties)) {
1104 synaptics_hardware = true;
1105
1106 if (max_proto > PSMOUSE_IMEX) {
1107 /*
1108 * Try activating protocol, but check if support is
1109 * enabled first, since we try detecting Synaptics
1110 * even when protocol is disabled.
1111 */
1112 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
1113 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
1114 if (!set_properties)
1115 return PSMOUSE_SYNAPTICS;
1116
1117 ret = synaptics_init(psmouse);
1118 if (ret >= 0)
1119 return ret;
1120 }
1121
1122 /*
1123 * Some Synaptics touchpads can emulate extended
1124 * protocols (like IMPS/2). Unfortunately
1125 * Logitech/Genius probes confuse some firmware
1126 * versions so we'll have to skip them.
1127 */
1128 max_proto = PSMOUSE_IMEX;
1129 }
1130
1131 /*
1132 * Make sure that touchpad is in relative mode, gestures
1133 * (taps) are enabled.
1134 */
1135 synaptics_reset(psmouse);
1136 }
1137
1138 /*
1139 * Try Cypress Trackpad. We must try it before Finger Sensing Pad
1140 * because Finger Sensing Pad probe upsets some modules of Cypress
1141 * Trackpads.
1142 */
1143 if (max_proto > PSMOUSE_IMEX &&
1144 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
1145 set_properties, true)) {
1146 return PSMOUSE_CYPRESS;
1147 }
1148
1149 /* Try ALPS TouchPad */
1150 if (max_proto > PSMOUSE_IMEX) {
1151 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1152 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
1153 &max_proto, set_properties, true))
1154 return PSMOUSE_ALPS;
1155 }
1156
1157 /* Try OLPC HGPK touchpad */
1158 if (max_proto > PSMOUSE_IMEX &&
1159 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
1160 set_properties, true)) {
1161 return PSMOUSE_HGPK;
1162 }
1163
1164 /* Try Elantech touchpad */
1165 if (max_proto > PSMOUSE_IMEX &&
1166 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
1167 &max_proto, set_properties, false)) {
1168 if (!set_properties)
1169 return PSMOUSE_ELANTECH;
1170
1171 ret = elantech_init(psmouse);
1172 if (ret >= 0)
1173 return ret;
1174 }
1175
1176 if (max_proto > PSMOUSE_IMEX) {
1177 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
1178 &max_proto, set_properties, true))
1179 return PSMOUSE_GENPS;
1180
1181 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
1182 &max_proto, set_properties, true))
1183 return PSMOUSE_PS2PP;
1184
1185 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
1186 &max_proto, set_properties, true))
1187 return PSMOUSE_TRACKPOINT;
1188
1189 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
1190 &max_proto, set_properties, true))
1191 return PSMOUSE_TOUCHKIT_PS2;
1192 }
1193
1194 /*
1195 * Try Finger Sensing Pad. We do it here because its probe upsets
1196 * Trackpoint devices (causing TP_READ_ID command to time out).
1197 */
1198 if (max_proto > PSMOUSE_IMEX &&
1199 psmouse_try_protocol(psmouse, PSMOUSE_FSP,
1200 &max_proto, set_properties, true)) {
1201 return PSMOUSE_FSP;
1202 }
1203
1204 /*
1205 * Reset to defaults in case the device got confused by extended
1206 * protocol probes. Note that we follow up with full reset because
1207 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
1208 */
1209 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1210 psmouse_reset(psmouse);
1211
1212 if (max_proto >= PSMOUSE_IMEX &&
1213 psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
1214 &max_proto, set_properties, true)) {
1215 return PSMOUSE_IMEX;
1216 }
1217
1218 if (max_proto >= PSMOUSE_IMPS &&
1219 psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
1220 &max_proto, set_properties, true)) {
1221 return PSMOUSE_IMPS;
1222 }
1223
1224 /*
1225 * Okay, all failed, we have a standard mouse here. The number of
1226 * the buttons is still a question, though. We assume 3.
1227 */
1228 psmouse_try_protocol(psmouse, PSMOUSE_PS2,
1229 &max_proto, set_properties, true);
1230
1231 if (synaptics_hardware) {
1232 /*
1233 * We detected Synaptics hardware but it did not respond to
1234 * IMPS/2 probes. We need to reset the touchpad because if
1235 * there is a track point on the pass through port it could
1236 * get disabled while probing for protocol extensions.
1237 */
1238 psmouse_reset(psmouse);
1239 }
1240
1241 return PSMOUSE_PS2;
1242 }
1243
1244 /*
1245 * psmouse_probe() probes for a PS/2 mouse.
1246 */
psmouse_probe(struct psmouse * psmouse)1247 static int psmouse_probe(struct psmouse *psmouse)
1248 {
1249 struct ps2dev *ps2dev = &psmouse->ps2dev;
1250 u8 param[2];
1251 int error;
1252
1253 /*
1254 * First, we check if it's a mouse. It should send 0x00 or 0x03 in
1255 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1256 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
1257 * subsequent ID queries, probably due to a firmware bug.
1258 */
1259 param[0] = 0xa5;
1260 error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
1261 if (error)
1262 return error;
1263
1264 if (param[0] != 0x00 && param[0] != 0x03 &&
1265 param[0] != 0x04 && param[0] != 0xff)
1266 return -ENODEV;
1267
1268 /*
1269 * Then we reset and disable the mouse so that it doesn't generate
1270 * events.
1271 */
1272 error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1273 if (error)
1274 psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
1275 ps2dev->serio->phys, error);
1276
1277 return 0;
1278 }
1279
1280 /*
1281 * psmouse_initialize() initializes the mouse to a sane state.
1282 */
psmouse_initialize(struct psmouse * psmouse)1283 static void psmouse_initialize(struct psmouse *psmouse)
1284 {
1285 /*
1286 * We set the mouse report rate, resolution and scaling.
1287 */
1288 if (psmouse_max_proto != PSMOUSE_PS2) {
1289 psmouse->set_rate(psmouse, psmouse->rate);
1290 psmouse->set_resolution(psmouse, psmouse->resolution);
1291 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1292 }
1293 }
1294
1295 /*
1296 * psmouse_activate() enables the mouse so that we get motion reports from it.
1297 */
psmouse_activate(struct psmouse * psmouse)1298 int psmouse_activate(struct psmouse *psmouse)
1299 {
1300 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1301 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1302 psmouse->ps2dev.serio->phys);
1303 return -1;
1304 }
1305
1306 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1307 return 0;
1308 }
1309
1310 /*
1311 * psmouse_deactivate() puts the mouse into poll mode so that we don't get
1312 * motion reports from it unless we explicitly request it.
1313 */
psmouse_deactivate(struct psmouse * psmouse)1314 int psmouse_deactivate(struct psmouse *psmouse)
1315 {
1316 int error;
1317
1318 error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
1319 if (error) {
1320 psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
1321 psmouse->ps2dev.serio->phys, error);
1322 return error;
1323 }
1324
1325 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1326 return 0;
1327 }
1328
1329 /*
1330 * psmouse_resync() attempts to re-validate current protocol.
1331 */
psmouse_resync(struct work_struct * work)1332 static void psmouse_resync(struct work_struct *work)
1333 {
1334 struct psmouse *parent = NULL, *psmouse =
1335 container_of(work, struct psmouse, resync_work.work);
1336 struct serio *serio = psmouse->ps2dev.serio;
1337 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1338 bool failed = false, enabled = false;
1339 int i;
1340
1341 mutex_lock(&psmouse_mutex);
1342
1343 if (psmouse->state != PSMOUSE_RESYNCING)
1344 goto out;
1345
1346 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1347 parent = serio_get_drvdata(serio->parent);
1348 psmouse_deactivate(parent);
1349 }
1350
1351 /*
1352 * Some mice don't ACK commands sent while they are in the middle of
1353 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1354 * instead of ps2_command() which would wait for 200ms for an ACK
1355 * that may never come.
1356 * As an additional quirk ALPS touchpads may not only forget to ACK
1357 * disable command but will stop reporting taps, so if we see that
1358 * mouse at least once ACKs disable we will do full reconnect if ACK
1359 * is missing.
1360 */
1361 psmouse->num_resyncs++;
1362
1363 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1364 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1365 failed = true;
1366 } else
1367 psmouse->acks_disable_command = true;
1368
1369 /*
1370 * Poll the mouse. If it was reset the packet will be shorter than
1371 * psmouse->pktsize and ps2_command will fail. We do not expect and
1372 * do not handle scenario when mouse "upgrades" its protocol while
1373 * disconnected since it would require additional delay. If we ever
1374 * see a mouse that does it we'll adjust the code.
1375 */
1376 if (!failed) {
1377 if (psmouse->poll(psmouse))
1378 failed = true;
1379 else {
1380 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1381 for (i = 0; i < psmouse->pktsize; i++) {
1382 psmouse->pktcnt++;
1383 rc = psmouse->protocol_handler(psmouse);
1384 if (rc != PSMOUSE_GOOD_DATA)
1385 break;
1386 }
1387 if (rc != PSMOUSE_FULL_PACKET)
1388 failed = true;
1389 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1390 }
1391 }
1392
1393 /*
1394 * Now try to enable mouse. We try to do that even if poll failed
1395 * and also repeat our attempts 5 times, otherwise we may be left
1396 * out with disabled mouse.
1397 */
1398 for (i = 0; i < 5; i++) {
1399 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1400 enabled = true;
1401 break;
1402 }
1403 msleep(200);
1404 }
1405
1406 if (!enabled) {
1407 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1408 psmouse->ps2dev.serio->phys);
1409 failed = true;
1410 }
1411
1412 if (failed) {
1413 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1414 psmouse_info(psmouse,
1415 "resync failed, issuing reconnect request\n");
1416 serio_reconnect(serio);
1417 } else
1418 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1419
1420 if (parent)
1421 psmouse_activate(parent);
1422 out:
1423 mutex_unlock(&psmouse_mutex);
1424 }
1425
1426 /*
1427 * psmouse_cleanup() resets the mouse into power-on state.
1428 */
psmouse_cleanup(struct serio * serio)1429 static void psmouse_cleanup(struct serio *serio)
1430 {
1431 struct psmouse *psmouse = serio_get_drvdata(serio);
1432 struct psmouse *parent = NULL;
1433
1434 mutex_lock(&psmouse_mutex);
1435
1436 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1437 parent = serio_get_drvdata(serio->parent);
1438 psmouse_deactivate(parent);
1439 }
1440
1441 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1442
1443 /*
1444 * Disable stream mode so cleanup routine can proceed undisturbed.
1445 */
1446 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1447 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1448 psmouse->ps2dev.serio->phys);
1449
1450 if (psmouse->cleanup)
1451 psmouse->cleanup(psmouse);
1452
1453 /*
1454 * Reset the mouse to defaults (bare PS/2 protocol).
1455 */
1456 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1457
1458 /*
1459 * Some boxes, such as HP nx7400, get terribly confused if mouse
1460 * is not fully enabled before suspending/shutting down.
1461 */
1462 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1463
1464 if (parent) {
1465 if (parent->pt_deactivate)
1466 parent->pt_deactivate(parent);
1467
1468 psmouse_activate(parent);
1469 }
1470
1471 mutex_unlock(&psmouse_mutex);
1472 }
1473
1474 /*
1475 * psmouse_disconnect() closes and frees.
1476 */
psmouse_disconnect(struct serio * serio)1477 static void psmouse_disconnect(struct serio *serio)
1478 {
1479 struct psmouse *psmouse = serio_get_drvdata(serio);
1480 struct psmouse *parent = NULL;
1481
1482 mutex_lock(&psmouse_mutex);
1483
1484 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1485
1486 /* make sure we don't have a resync in progress */
1487 mutex_unlock(&psmouse_mutex);
1488 flush_workqueue(kpsmoused_wq);
1489 mutex_lock(&psmouse_mutex);
1490
1491 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1492 parent = serio_get_drvdata(serio->parent);
1493 psmouse_deactivate(parent);
1494 }
1495
1496 if (psmouse->disconnect)
1497 psmouse->disconnect(psmouse);
1498
1499 if (parent && parent->pt_deactivate)
1500 parent->pt_deactivate(parent);
1501
1502 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1503
1504 serio_close(serio);
1505 serio_set_drvdata(serio, NULL);
1506
1507 if (psmouse->dev)
1508 input_unregister_device(psmouse->dev);
1509
1510 kfree(psmouse);
1511
1512 if (parent)
1513 psmouse_activate(parent);
1514
1515 mutex_unlock(&psmouse_mutex);
1516 }
1517
psmouse_switch_protocol(struct psmouse * psmouse,const struct psmouse_protocol * proto)1518 static int psmouse_switch_protocol(struct psmouse *psmouse,
1519 const struct psmouse_protocol *proto)
1520 {
1521 const struct psmouse_protocol *selected_proto;
1522 struct input_dev *input_dev = psmouse->dev;
1523 enum psmouse_type type;
1524
1525 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1526
1527 if (proto && (proto->detect || proto->init)) {
1528 psmouse_apply_defaults(psmouse);
1529
1530 if (proto->detect && proto->detect(psmouse, true) < 0)
1531 return -1;
1532
1533 if (proto->init && proto->init(psmouse) < 0)
1534 return -1;
1535
1536 selected_proto = proto;
1537 } else {
1538 type = psmouse_extensions(psmouse, psmouse_max_proto, true);
1539 selected_proto = psmouse_protocol_by_type(type);
1540 }
1541
1542 psmouse->protocol = selected_proto;
1543
1544 /*
1545 * If mouse's packet size is 3 there is no point in polling the
1546 * device in hopes to detect protocol reset - we won't get less
1547 * than 3 bytes response anyhow.
1548 */
1549 if (psmouse->pktsize == 3)
1550 psmouse->resync_time = 0;
1551
1552 /*
1553 * Some smart KVMs fake response to POLL command returning just
1554 * 3 bytes and messing up our resync logic, so if initial poll
1555 * fails we won't try polling the device anymore. Hopefully
1556 * such KVM will maintain initially selected protocol.
1557 */
1558 if (psmouse->resync_time && psmouse->poll(psmouse))
1559 psmouse->resync_time = 0;
1560
1561 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1562 selected_proto->name, psmouse->vendor, psmouse->name);
1563
1564 input_dev->name = psmouse->devname;
1565 input_dev->phys = psmouse->phys;
1566 input_dev->id.bustype = BUS_I8042;
1567 input_dev->id.vendor = 0x0002;
1568 input_dev->id.product = psmouse->protocol->type;
1569 input_dev->id.version = psmouse->model;
1570
1571 return 0;
1572 }
1573
1574 /*
1575 * psmouse_connect() is a callback from the serio module when
1576 * an unhandled serio port is found.
1577 */
psmouse_connect(struct serio * serio,struct serio_driver * drv)1578 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1579 {
1580 struct psmouse *psmouse, *parent = NULL;
1581 struct input_dev *input_dev;
1582 int retval = 0, error = -ENOMEM;
1583
1584 mutex_lock(&psmouse_mutex);
1585
1586 /*
1587 * If this is a pass-through port deactivate parent so the device
1588 * connected to this port can be successfully identified
1589 */
1590 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1591 parent = serio_get_drvdata(serio->parent);
1592 psmouse_deactivate(parent);
1593 }
1594
1595 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1596 input_dev = input_allocate_device();
1597 if (!psmouse || !input_dev)
1598 goto err_free;
1599
1600 ps2_init(&psmouse->ps2dev, serio);
1601 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1602 psmouse->dev = input_dev;
1603 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1604
1605 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1606
1607 serio_set_drvdata(serio, psmouse);
1608
1609 error = serio_open(serio, drv);
1610 if (error)
1611 goto err_clear_drvdata;
1612
1613 /* give PT device some time to settle down before probing */
1614 if (serio->id.type == SERIO_PS_PSTHRU)
1615 usleep_range(10000, 15000);
1616
1617 if (psmouse_probe(psmouse) < 0) {
1618 error = -ENODEV;
1619 goto err_close_serio;
1620 }
1621
1622 psmouse->rate = psmouse_rate;
1623 psmouse->resolution = psmouse_resolution;
1624 psmouse->resetafter = psmouse_resetafter;
1625 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1626 psmouse->smartscroll = psmouse_smartscroll;
1627
1628 psmouse_switch_protocol(psmouse, NULL);
1629
1630 if (!psmouse->protocol->smbus_companion) {
1631 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1632 psmouse_initialize(psmouse);
1633
1634 error = input_register_device(input_dev);
1635 if (error)
1636 goto err_protocol_disconnect;
1637 } else {
1638 /* Smbus companion will be reporting events, not us. */
1639 input_free_device(input_dev);
1640 psmouse->dev = input_dev = NULL;
1641 }
1642
1643 if (parent && parent->pt_activate)
1644 parent->pt_activate(parent);
1645
1646 /*
1647 * PS/2 devices having SMBus companions should stay disabled
1648 * on PS/2 side, in order to have SMBus part operable.
1649 */
1650 if (!psmouse->protocol->smbus_companion)
1651 psmouse_activate(psmouse);
1652
1653 out:
1654 /* If this is a pass-through port the parent needs to be re-activated */
1655 if (parent)
1656 psmouse_activate(parent);
1657
1658 mutex_unlock(&psmouse_mutex);
1659 return retval;
1660
1661 err_protocol_disconnect:
1662 if (psmouse->disconnect)
1663 psmouse->disconnect(psmouse);
1664 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1665 err_close_serio:
1666 serio_close(serio);
1667 err_clear_drvdata:
1668 serio_set_drvdata(serio, NULL);
1669 err_free:
1670 input_free_device(input_dev);
1671 kfree(psmouse);
1672
1673 retval = error;
1674 goto out;
1675 }
1676
__psmouse_reconnect(struct serio * serio,bool fast_reconnect)1677 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
1678 {
1679 struct psmouse *psmouse = serio_get_drvdata(serio);
1680 struct psmouse *parent = NULL;
1681 int (*reconnect_handler)(struct psmouse *);
1682 enum psmouse_type type;
1683 int rc = -1;
1684
1685 mutex_lock(&psmouse_mutex);
1686
1687 if (fast_reconnect) {
1688 reconnect_handler = psmouse->fast_reconnect;
1689 if (!reconnect_handler) {
1690 rc = -ENOENT;
1691 goto out_unlock;
1692 }
1693 } else {
1694 reconnect_handler = psmouse->reconnect;
1695 }
1696
1697 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1698 parent = serio_get_drvdata(serio->parent);
1699 psmouse_deactivate(parent);
1700 }
1701
1702 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1703
1704 if (reconnect_handler) {
1705 if (reconnect_handler(psmouse))
1706 goto out;
1707 } else {
1708 psmouse_reset(psmouse);
1709
1710 if (psmouse_probe(psmouse) < 0)
1711 goto out;
1712
1713 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1714 if (psmouse->protocol->type != type)
1715 goto out;
1716 }
1717
1718 /*
1719 * OK, the device type (and capabilities) match the old one,
1720 * we can continue using it, complete initialization
1721 */
1722 if (!psmouse->protocol->smbus_companion) {
1723 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1724 psmouse_initialize(psmouse);
1725 }
1726
1727 if (parent && parent->pt_activate)
1728 parent->pt_activate(parent);
1729
1730 /*
1731 * PS/2 devices having SMBus companions should stay disabled
1732 * on PS/2 side, in order to have SMBus part operable.
1733 */
1734 if (!psmouse->protocol->smbus_companion)
1735 psmouse_activate(psmouse);
1736
1737 rc = 0;
1738
1739 out:
1740 /* If this is a pass-through port the parent waits to be activated */
1741 if (parent)
1742 psmouse_activate(parent);
1743
1744 out_unlock:
1745 mutex_unlock(&psmouse_mutex);
1746 return rc;
1747 }
1748
psmouse_reconnect(struct serio * serio)1749 static int psmouse_reconnect(struct serio *serio)
1750 {
1751 return __psmouse_reconnect(serio, false);
1752 }
1753
psmouse_fast_reconnect(struct serio * serio)1754 static int psmouse_fast_reconnect(struct serio *serio)
1755 {
1756 return __psmouse_reconnect(serio, true);
1757 }
1758
1759 static struct serio_device_id psmouse_serio_ids[] = {
1760 {
1761 .type = SERIO_8042,
1762 .proto = SERIO_ANY,
1763 .id = SERIO_ANY,
1764 .extra = SERIO_ANY,
1765 },
1766 {
1767 .type = SERIO_PS_PSTHRU,
1768 .proto = SERIO_ANY,
1769 .id = SERIO_ANY,
1770 .extra = SERIO_ANY,
1771 },
1772 { 0 }
1773 };
1774
1775 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1776
1777 static struct serio_driver psmouse_drv = {
1778 .driver = {
1779 .name = "psmouse",
1780 .dev_groups = psmouse_dev_groups,
1781 },
1782 .description = DRIVER_DESC,
1783 .id_table = psmouse_serio_ids,
1784 .interrupt = psmouse_interrupt,
1785 .connect = psmouse_connect,
1786 .reconnect = psmouse_reconnect,
1787 .fast_reconnect = psmouse_fast_reconnect,
1788 .disconnect = psmouse_disconnect,
1789 .cleanup = psmouse_cleanup,
1790 };
1791
psmouse_attr_show_helper(struct device * dev,struct device_attribute * devattr,char * buf)1792 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1793 char *buf)
1794 {
1795 struct serio *serio = to_serio_port(dev);
1796 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1797 struct psmouse *psmouse = serio_get_drvdata(serio);
1798
1799 if (psmouse->protocol->smbus_companion &&
1800 devattr != &psmouse_attr_protocol.dattr)
1801 return -ENOENT;
1802
1803 return attr->show(psmouse, attr->data, buf);
1804 }
1805
psmouse_attr_set_helper(struct device * dev,struct device_attribute * devattr,const char * buf,size_t count)1806 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1807 const char *buf, size_t count)
1808 {
1809 struct serio *serio = to_serio_port(dev);
1810 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1811 struct psmouse *psmouse, *parent = NULL;
1812 int retval;
1813
1814 retval = mutex_lock_interruptible(&psmouse_mutex);
1815 if (retval)
1816 goto out;
1817
1818 psmouse = serio_get_drvdata(serio);
1819
1820 if (psmouse->protocol->smbus_companion &&
1821 devattr != &psmouse_attr_protocol.dattr) {
1822 retval = -ENOENT;
1823 goto out_unlock;
1824 }
1825
1826 if (attr->protect) {
1827 if (psmouse->state == PSMOUSE_IGNORE) {
1828 retval = -ENODEV;
1829 goto out_unlock;
1830 }
1831
1832 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1833 parent = serio_get_drvdata(serio->parent);
1834 psmouse_deactivate(parent);
1835 }
1836
1837 if (!psmouse->protocol->smbus_companion)
1838 psmouse_deactivate(psmouse);
1839 }
1840
1841 retval = attr->set(psmouse, attr->data, buf, count);
1842
1843 if (attr->protect) {
1844 if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
1845 psmouse_activate(psmouse);
1846
1847 if (parent)
1848 psmouse_activate(parent);
1849 }
1850
1851 out_unlock:
1852 mutex_unlock(&psmouse_mutex);
1853 out:
1854 return retval;
1855 }
1856
psmouse_show_int_attr(struct psmouse * psmouse,void * offset,char * buf)1857 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1858 {
1859 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1860
1861 return sprintf(buf, "%u\n", *field);
1862 }
1863
psmouse_set_int_attr(struct psmouse * psmouse,void * offset,const char * buf,size_t count)1864 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1865 {
1866 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1867 unsigned int value;
1868 int err;
1869
1870 err = kstrtouint(buf, 10, &value);
1871 if (err)
1872 return err;
1873
1874 *field = value;
1875
1876 return count;
1877 }
1878
psmouse_attr_show_protocol(struct psmouse * psmouse,void * data,char * buf)1879 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1880 {
1881 return sprintf(buf, "%s\n", psmouse->protocol->name);
1882 }
1883
psmouse_attr_set_protocol(struct psmouse * psmouse,void * data,const char * buf,size_t count)1884 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1885 {
1886 struct serio *serio = psmouse->ps2dev.serio;
1887 struct psmouse *parent = NULL;
1888 struct input_dev *old_dev, *new_dev;
1889 const struct psmouse_protocol *proto, *old_proto;
1890 int error;
1891 int retry = 0;
1892
1893 proto = psmouse_protocol_by_name(buf, count);
1894 if (!proto)
1895 return -EINVAL;
1896
1897 if (psmouse->protocol == proto)
1898 return count;
1899
1900 new_dev = input_allocate_device();
1901 if (!new_dev)
1902 return -ENOMEM;
1903
1904 while (!list_empty(&serio->children)) {
1905 if (++retry > 3) {
1906 psmouse_warn(psmouse,
1907 "failed to destroy children ports, protocol change aborted.\n");
1908 input_free_device(new_dev);
1909 return -EIO;
1910 }
1911
1912 mutex_unlock(&psmouse_mutex);
1913 serio_unregister_child_port(serio);
1914 mutex_lock(&psmouse_mutex);
1915
1916 if (serio->drv != &psmouse_drv) {
1917 input_free_device(new_dev);
1918 return -ENODEV;
1919 }
1920
1921 if (psmouse->protocol == proto) {
1922 input_free_device(new_dev);
1923 return count; /* switched by other thread */
1924 }
1925 }
1926
1927 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1928 parent = serio_get_drvdata(serio->parent);
1929 if (parent->pt_deactivate)
1930 parent->pt_deactivate(parent);
1931 }
1932
1933 old_dev = psmouse->dev;
1934 old_proto = psmouse->protocol;
1935
1936 if (psmouse->disconnect)
1937 psmouse->disconnect(psmouse);
1938
1939 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1940
1941 psmouse->dev = new_dev;
1942 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1943
1944 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1945 psmouse_reset(psmouse);
1946 /* default to PSMOUSE_PS2 */
1947 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1948 }
1949
1950 psmouse_initialize(psmouse);
1951 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1952
1953 if (psmouse->protocol->smbus_companion) {
1954 input_free_device(psmouse->dev);
1955 psmouse->dev = NULL;
1956 } else {
1957 error = input_register_device(psmouse->dev);
1958 if (error) {
1959 if (psmouse->disconnect)
1960 psmouse->disconnect(psmouse);
1961
1962 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1963 input_free_device(new_dev);
1964 psmouse->dev = old_dev;
1965 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1966 psmouse_switch_protocol(psmouse, old_proto);
1967 psmouse_initialize(psmouse);
1968 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1969
1970 return error;
1971 }
1972 }
1973
1974 if (old_dev)
1975 input_unregister_device(old_dev);
1976
1977 if (parent && parent->pt_activate)
1978 parent->pt_activate(parent);
1979
1980 return count;
1981 }
1982
psmouse_attr_set_rate(struct psmouse * psmouse,void * data,const char * buf,size_t count)1983 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1984 {
1985 unsigned int value;
1986 int err;
1987
1988 err = kstrtouint(buf, 10, &value);
1989 if (err)
1990 return err;
1991
1992 psmouse->set_rate(psmouse, value);
1993 return count;
1994 }
1995
psmouse_attr_set_resolution(struct psmouse * psmouse,void * data,const char * buf,size_t count)1996 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1997 {
1998 unsigned int value;
1999 int err;
2000
2001 err = kstrtouint(buf, 10, &value);
2002 if (err)
2003 return err;
2004
2005 psmouse->set_resolution(psmouse, value);
2006 return count;
2007 }
2008
2009
psmouse_set_maxproto(const char * val,const struct kernel_param * kp)2010 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
2011 {
2012 const struct psmouse_protocol *proto;
2013
2014 if (!val)
2015 return -EINVAL;
2016
2017 proto = psmouse_protocol_by_name(val, strlen(val));
2018
2019 if (!proto || !proto->maxproto)
2020 return -EINVAL;
2021
2022 *((unsigned int *)kp->arg) = proto->type;
2023
2024 return 0;
2025 }
2026
psmouse_get_maxproto(char * buffer,const struct kernel_param * kp)2027 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
2028 {
2029 int type = *((unsigned int *)kp->arg);
2030
2031 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
2032 }
2033
psmouse_init(void)2034 static int __init psmouse_init(void)
2035 {
2036 int err;
2037
2038 lifebook_module_init();
2039 synaptics_module_init();
2040 hgpk_module_init();
2041
2042 err = psmouse_smbus_module_init();
2043 if (err)
2044 return err;
2045
2046 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
2047 if (!kpsmoused_wq) {
2048 pr_err("failed to create kpsmoused workqueue\n");
2049 err = -ENOMEM;
2050 goto err_smbus_exit;
2051 }
2052
2053 err = serio_register_driver(&psmouse_drv);
2054 if (err)
2055 goto err_destroy_wq;
2056
2057 return 0;
2058
2059 err_destroy_wq:
2060 destroy_workqueue(kpsmoused_wq);
2061 err_smbus_exit:
2062 psmouse_smbus_module_exit();
2063 return err;
2064 }
2065
psmouse_exit(void)2066 static void __exit psmouse_exit(void)
2067 {
2068 serio_unregister_driver(&psmouse_drv);
2069 destroy_workqueue(kpsmoused_wq);
2070 psmouse_smbus_module_exit();
2071 }
2072
2073 module_init(psmouse_init);
2074 module_exit(psmouse_exit);
2075