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_attributes[] = {
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 static const struct attribute_group psmouse_attribute_group = {
107 .attrs = psmouse_attributes,
108 };
109
110 /*
111 * psmouse_mutex protects all operations changing state of mouse
112 * (connecting, disconnecting, changing rate or resolution via
113 * sysfs). We could use a per-device semaphore but since there
114 * rarely more than one PS/2 mouse connected and since semaphore
115 * is taken in "slow" paths it is not worth it.
116 */
117 static DEFINE_MUTEX(psmouse_mutex);
118
119 static struct workqueue_struct *kpsmoused_wq;
120
psmouse_report_standard_buttons(struct input_dev * dev,u8 buttons)121 void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
122 {
123 input_report_key(dev, BTN_LEFT, buttons & BIT(0));
124 input_report_key(dev, BTN_MIDDLE, buttons & BIT(2));
125 input_report_key(dev, BTN_RIGHT, buttons & BIT(1));
126 }
127
psmouse_report_standard_motion(struct input_dev * dev,u8 * packet)128 void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
129 {
130 int x, y;
131
132 x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
133 y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
134
135 input_report_rel(dev, REL_X, x);
136 input_report_rel(dev, REL_Y, -y);
137 }
138
psmouse_report_standard_packet(struct input_dev * dev,u8 * packet)139 void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
140 {
141 psmouse_report_standard_buttons(dev, packet[0]);
142 psmouse_report_standard_motion(dev, packet);
143 }
144
145 /*
146 * psmouse_process_byte() analyzes the PS/2 data stream and reports
147 * relevant events to the input module once full packet has arrived.
148 */
psmouse_process_byte(struct psmouse * psmouse)149 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
150 {
151 struct input_dev *dev = psmouse->dev;
152 u8 *packet = psmouse->packet;
153 int wheel;
154
155 if (psmouse->pktcnt < psmouse->pktsize)
156 return PSMOUSE_GOOD_DATA;
157
158 /* Full packet accumulated, process it */
159
160 switch (psmouse->protocol->type) {
161 case PSMOUSE_IMPS:
162 /* IntelliMouse has scroll wheel */
163 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
164 break;
165
166 case PSMOUSE_IMEX:
167 /* Scroll wheel and buttons on IntelliMouse Explorer */
168 switch (packet[3] & 0xC0) {
169 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
170 input_report_rel(dev, REL_WHEEL,
171 -sign_extend32(packet[3], 5));
172 break;
173 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
174 input_report_rel(dev, REL_HWHEEL,
175 -sign_extend32(packet[3], 5));
176 break;
177 case 0x00:
178 case 0xC0:
179 wheel = sign_extend32(packet[3], 3);
180
181 /*
182 * Some A4Tech mice have two scroll wheels, with first
183 * one reporting +/-1 in the lower nibble, and second
184 * one reporting +/-2.
185 */
186 if (psmouse_a4tech_2wheels && abs(wheel) > 1)
187 input_report_rel(dev, REL_HWHEEL, wheel / 2);
188 else
189 input_report_rel(dev, REL_WHEEL, -wheel);
190
191 input_report_key(dev, BTN_SIDE, packet[3] & BIT(4));
192 input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5));
193 break;
194 }
195 break;
196
197 case PSMOUSE_GENPS:
198 /* Report scroll buttons on NetMice */
199 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
200
201 /* Extra buttons on Genius NewNet 3D */
202 input_report_key(dev, BTN_SIDE, packet[0] & BIT(6));
203 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7));
204 break;
205
206 case PSMOUSE_THINKPS:
207 /* Extra button on ThinkingMouse */
208 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3));
209
210 /*
211 * Without this bit of weirdness moving up gives wildly
212 * high Y changes.
213 */
214 packet[1] |= (packet[0] & 0x40) << 1;
215 break;
216
217 case PSMOUSE_CORTRON:
218 /*
219 * Cortron PS2 Trackball reports SIDE button in the
220 * 4th bit of the first byte.
221 */
222 input_report_key(dev, BTN_SIDE, packet[0] & BIT(3));
223 packet[0] |= BIT(3);
224 break;
225
226 default:
227 break;
228 }
229
230 /* Generic PS/2 Mouse */
231 packet[0] |= psmouse->extra_buttons;
232 psmouse_report_standard_packet(dev, packet);
233
234 input_sync(dev);
235
236 return PSMOUSE_FULL_PACKET;
237 }
238
psmouse_queue_work(struct psmouse * psmouse,struct delayed_work * work,unsigned long delay)239 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
240 unsigned long delay)
241 {
242 queue_delayed_work(kpsmoused_wq, work, delay);
243 }
244
245 /*
246 * __psmouse_set_state() sets new psmouse state and resets all flags.
247 */
__psmouse_set_state(struct psmouse * psmouse,enum psmouse_state new_state)248 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
249 {
250 psmouse->state = new_state;
251 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
252 psmouse->ps2dev.flags = 0;
253 psmouse->last = jiffies;
254 }
255
256 /*
257 * psmouse_set_state() sets new psmouse state and resets all flags and
258 * counters while holding serio lock so fighting with interrupt handler
259 * is not a concern.
260 */
psmouse_set_state(struct psmouse * psmouse,enum psmouse_state new_state)261 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
262 {
263 serio_pause_rx(psmouse->ps2dev.serio);
264 __psmouse_set_state(psmouse, new_state);
265 serio_continue_rx(psmouse->ps2dev.serio);
266 }
267
268 /*
269 * psmouse_handle_byte() processes one byte of the input data stream
270 * by calling corresponding protocol handler.
271 */
psmouse_handle_byte(struct psmouse * psmouse)272 static int psmouse_handle_byte(struct psmouse *psmouse)
273 {
274 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
275
276 switch (rc) {
277 case PSMOUSE_BAD_DATA:
278 if (psmouse->state == PSMOUSE_ACTIVATED) {
279 psmouse_warn(psmouse,
280 "%s at %s lost sync at byte %d\n",
281 psmouse->name, psmouse->phys,
282 psmouse->pktcnt);
283 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
284 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
285 psmouse_notice(psmouse,
286 "issuing reconnect request\n");
287 serio_reconnect(psmouse->ps2dev.serio);
288 return -EIO;
289 }
290 }
291 psmouse->pktcnt = 0;
292 break;
293
294 case PSMOUSE_FULL_PACKET:
295 psmouse->pktcnt = 0;
296 if (psmouse->out_of_sync_cnt) {
297 psmouse->out_of_sync_cnt = 0;
298 psmouse_notice(psmouse,
299 "%s at %s - driver resynced.\n",
300 psmouse->name, psmouse->phys);
301 }
302 break;
303
304 case PSMOUSE_GOOD_DATA:
305 break;
306 }
307 return 0;
308 }
309
psmouse_handle_oob_data(struct psmouse * psmouse,u8 data)310 static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
311 {
312 switch (psmouse->oob_data_type) {
313 case PSMOUSE_OOB_NONE:
314 psmouse->oob_data_type = data;
315 break;
316
317 case PSMOUSE_OOB_EXTRA_BTNS:
318 psmouse_report_standard_buttons(psmouse->dev, data);
319 input_sync(psmouse->dev);
320
321 psmouse->extra_buttons = data;
322 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
323 break;
324
325 default:
326 psmouse_warn(psmouse,
327 "unknown OOB_DATA type: 0x%02x\n",
328 psmouse->oob_data_type);
329 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
330 break;
331 }
332 }
333
334 /*
335 * psmouse_interrupt() handles incoming characters, either passing them
336 * for normal processing or gathering them as command response.
337 */
psmouse_interrupt(struct serio * serio,u8 data,unsigned int flags)338 static irqreturn_t psmouse_interrupt(struct serio *serio,
339 u8 data, unsigned int flags)
340 {
341 struct psmouse *psmouse = serio_get_drvdata(serio);
342
343 if (psmouse->state == PSMOUSE_IGNORE)
344 goto out;
345
346 if (unlikely((flags & SERIO_TIMEOUT) ||
347 ((flags & SERIO_PARITY) &&
348 !psmouse->protocol->ignore_parity))) {
349
350 if (psmouse->state == PSMOUSE_ACTIVATED)
351 psmouse_warn(psmouse,
352 "bad data from KBC -%s%s\n",
353 flags & SERIO_TIMEOUT ? " timeout" : "",
354 flags & SERIO_PARITY ? " bad parity" : "");
355 ps2_cmd_aborted(&psmouse->ps2dev);
356 goto out;
357 }
358
359 if (flags & SERIO_OOB_DATA) {
360 psmouse_handle_oob_data(psmouse, data);
361 goto out;
362 }
363
364 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
365 if (ps2_handle_ack(&psmouse->ps2dev, data))
366 goto out;
367
368 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
369 if (ps2_handle_response(&psmouse->ps2dev, data))
370 goto out;
371
372 pm_wakeup_event(&serio->dev, 0);
373
374 if (psmouse->state <= PSMOUSE_RESYNCING)
375 goto out;
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, PSMOUSE_RESYNCING);
383 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
384 goto out;
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 goto out;
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, PSMOUSE_IGNORE);
400 serio_reconnect(serio);
401 goto out;
402 }
403
404 /* Not a new device, try processing first byte normally */
405 psmouse->pktcnt = 1;
406 if (psmouse_handle_byte(psmouse))
407 goto out;
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, PSMOUSE_RESYNCING);
421 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
422 goto out;
423 }
424
425 psmouse->last = jiffies;
426 psmouse_handle_byte(psmouse);
427
428 out:
429 return IRQ_HANDLED;
430 }
431
432 /*
433 * psmouse_reset() resets the mouse into power-on state.
434 */
psmouse_reset(struct psmouse * psmouse)435 int psmouse_reset(struct psmouse *psmouse)
436 {
437 u8 param[2];
438 int error;
439
440 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
441 if (error)
442 return error;
443
444 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
445 return -EIO;
446
447 return 0;
448 }
449
450 /*
451 * Here we set the mouse resolution.
452 */
psmouse_set_resolution(struct psmouse * psmouse,unsigned int resolution)453 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
454 {
455 static const u8 params[] = { 0, 1, 2, 2, 3 };
456 u8 p;
457
458 if (resolution == 0 || resolution > 200)
459 resolution = 200;
460
461 p = params[resolution / 50];
462 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
463 psmouse->resolution = 25 << p;
464 }
465
466 /*
467 * Here we set the mouse report rate.
468 */
psmouse_set_rate(struct psmouse * psmouse,unsigned int rate)469 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
470 {
471 static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
472 u8 r;
473 int i = 0;
474
475 while (rates[i] > rate)
476 i++;
477 r = rates[i];
478 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
479 psmouse->rate = r;
480 }
481
482 /*
483 * Here we set the mouse scaling.
484 */
psmouse_set_scale(struct psmouse * psmouse,enum psmouse_scale scale)485 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
486 {
487 ps2_command(&psmouse->ps2dev, NULL,
488 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
489 PSMOUSE_CMD_SETSCALE11);
490 }
491
492 /*
493 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
494 */
psmouse_poll(struct psmouse * psmouse)495 static int psmouse_poll(struct psmouse *psmouse)
496 {
497 return ps2_command(&psmouse->ps2dev, psmouse->packet,
498 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
499 }
500
psmouse_check_pnp_id(const char * id,const char * const ids[])501 static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
502 {
503 int i;
504
505 for (i = 0; ids[i]; i++)
506 if (!strcasecmp(id, ids[i]))
507 return true;
508
509 return false;
510 }
511
512 /*
513 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
514 */
psmouse_matches_pnp_id(struct psmouse * psmouse,const char * const ids[])515 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
516 {
517 struct serio *serio = psmouse->ps2dev.serio;
518 char *p, *fw_id_copy, *save_ptr;
519 bool found = false;
520
521 if (strncmp(serio->firmware_id, "PNP: ", 5))
522 return false;
523
524 fw_id_copy = kstrndup(&serio->firmware_id[5],
525 sizeof(serio->firmware_id) - 5,
526 GFP_KERNEL);
527 if (!fw_id_copy)
528 return false;
529
530 save_ptr = fw_id_copy;
531 while ((p = strsep(&fw_id_copy, " ")) != NULL) {
532 if (psmouse_check_pnp_id(p, ids)) {
533 found = true;
534 break;
535 }
536 }
537
538 kfree(save_ptr);
539 return found;
540 }
541
542 /*
543 * Genius NetMouse magic init.
544 */
genius_detect(struct psmouse * psmouse,bool set_properties)545 static int genius_detect(struct psmouse *psmouse, bool set_properties)
546 {
547 struct ps2dev *ps2dev = &psmouse->ps2dev;
548 u8 param[4];
549
550 param[0] = 3;
551 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
552 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
553 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
554 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
555 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
556
557 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
558 return -ENODEV;
559
560 if (set_properties) {
561 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
562 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
563 __set_bit(BTN_SIDE, psmouse->dev->keybit);
564 __set_bit(REL_WHEEL, psmouse->dev->relbit);
565
566 psmouse->vendor = "Genius";
567 psmouse->name = "Mouse";
568 psmouse->pktsize = 4;
569 }
570
571 return 0;
572 }
573
574 /*
575 * IntelliMouse magic init.
576 */
intellimouse_detect(struct psmouse * psmouse,bool set_properties)577 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
578 {
579 struct ps2dev *ps2dev = &psmouse->ps2dev;
580 u8 param[2];
581
582 param[0] = 200;
583 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
584 param[0] = 100;
585 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
586 param[0] = 80;
587 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
588 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
589
590 if (param[0] != 3)
591 return -ENODEV;
592
593 if (set_properties) {
594 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
595 __set_bit(REL_WHEEL, psmouse->dev->relbit);
596
597 if (!psmouse->vendor)
598 psmouse->vendor = "Generic";
599 if (!psmouse->name)
600 psmouse->name = "Wheel Mouse";
601 psmouse->pktsize = 4;
602 }
603
604 return 0;
605 }
606
607 /*
608 * Try IntelliMouse/Explorer magic init.
609 */
im_explorer_detect(struct psmouse * psmouse,bool set_properties)610 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
611 {
612 struct ps2dev *ps2dev = &psmouse->ps2dev;
613 u8 param[2];
614
615 intellimouse_detect(psmouse, 0);
616
617 param[0] = 200;
618 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
619 param[0] = 200;
620 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
621 param[0] = 80;
622 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
623 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
624
625 if (param[0] != 4)
626 return -ENODEV;
627
628 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
629 param[0] = 200;
630 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
631 param[0] = 80;
632 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
633 param[0] = 40;
634 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
635
636 if (set_properties) {
637 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
638 __set_bit(REL_WHEEL, psmouse->dev->relbit);
639 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
640 __set_bit(BTN_SIDE, psmouse->dev->keybit);
641 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
642
643 if (!psmouse->vendor)
644 psmouse->vendor = "Generic";
645 if (!psmouse->name)
646 psmouse->name = "Explorer Mouse";
647 psmouse->pktsize = 4;
648 }
649
650 return 0;
651 }
652
653 /*
654 * Kensington ThinkingMouse / ExpertMouse magic init.
655 */
thinking_detect(struct psmouse * psmouse,bool set_properties)656 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
657 {
658 struct ps2dev *ps2dev = &psmouse->ps2dev;
659 u8 param[2];
660 static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
661 int i;
662
663 param[0] = 10;
664 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
665 param[0] = 0;
666 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
667 for (i = 0; i < ARRAY_SIZE(seq); i++) {
668 param[0] = seq[i];
669 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
670 }
671 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
672
673 if (param[0] != 2)
674 return -ENODEV;
675
676 if (set_properties) {
677 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
678 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
679
680 psmouse->vendor = "Kensington";
681 psmouse->name = "ThinkingMouse";
682 }
683
684 return 0;
685 }
686
687 /*
688 * Bare PS/2 protocol "detection". Always succeeds.
689 */
ps2bare_detect(struct psmouse * psmouse,bool set_properties)690 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
691 {
692 if (set_properties) {
693 if (!psmouse->vendor)
694 psmouse->vendor = "Generic";
695 if (!psmouse->name)
696 psmouse->name = "Mouse";
697
698 /*
699 * We have no way of figuring true number of buttons so let's
700 * assume that the device has 3.
701 */
702 input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
703 }
704
705 return 0;
706 }
707
708 /*
709 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
710 * must be forced by sysfs protocol writing.
711 */
cortron_detect(struct psmouse * psmouse,bool set_properties)712 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
713 {
714 if (set_properties) {
715 psmouse->vendor = "Cortron";
716 psmouse->name = "PS/2 Trackball";
717
718 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
719 __set_bit(BTN_SIDE, psmouse->dev->keybit);
720 }
721
722 return 0;
723 }
724
725 static const struct psmouse_protocol psmouse_protocols[] = {
726 {
727 .type = PSMOUSE_PS2,
728 .name = "PS/2",
729 .alias = "bare",
730 .maxproto = true,
731 .ignore_parity = true,
732 .detect = ps2bare_detect,
733 .try_passthru = true,
734 },
735 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
736 {
737 .type = PSMOUSE_PS2PP,
738 .name = "PS2++",
739 .alias = "logitech",
740 .detect = ps2pp_detect,
741 },
742 #endif
743 {
744 .type = PSMOUSE_THINKPS,
745 .name = "ThinkPS/2",
746 .alias = "thinkps",
747 .detect = thinking_detect,
748 },
749 #ifdef CONFIG_MOUSE_PS2_CYPRESS
750 {
751 .type = PSMOUSE_CYPRESS,
752 .name = "CyPS/2",
753 .alias = "cypress",
754 .detect = cypress_detect,
755 .init = cypress_init,
756 },
757 #endif
758 {
759 .type = PSMOUSE_GENPS,
760 .name = "GenPS/2",
761 .alias = "genius",
762 .detect = genius_detect,
763 },
764 {
765 .type = PSMOUSE_IMPS,
766 .name = "ImPS/2",
767 .alias = "imps",
768 .maxproto = true,
769 .ignore_parity = true,
770 .detect = intellimouse_detect,
771 .try_passthru = true,
772 },
773 {
774 .type = PSMOUSE_IMEX,
775 .name = "ImExPS/2",
776 .alias = "exps",
777 .maxproto = true,
778 .ignore_parity = true,
779 .detect = im_explorer_detect,
780 .try_passthru = true,
781 },
782 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
783 {
784 .type = PSMOUSE_SYNAPTICS,
785 .name = "SynPS/2",
786 .alias = "synaptics",
787 .detect = synaptics_detect,
788 .init = synaptics_init_absolute,
789 },
790 {
791 .type = PSMOUSE_SYNAPTICS_RELATIVE,
792 .name = "SynRelPS/2",
793 .alias = "synaptics-relative",
794 .detect = synaptics_detect,
795 .init = synaptics_init_relative,
796 },
797 #endif
798 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
799 {
800 .type = PSMOUSE_SYNAPTICS_SMBUS,
801 .name = "SynSMBus",
802 .alias = "synaptics-smbus",
803 .detect = synaptics_detect,
804 .init = synaptics_init_smbus,
805 .smbus_companion = true,
806 },
807 #endif
808 #ifdef CONFIG_MOUSE_PS2_ALPS
809 {
810 .type = PSMOUSE_ALPS,
811 .name = "AlpsPS/2",
812 .alias = "alps",
813 .detect = alps_detect,
814 .init = alps_init,
815 },
816 #endif
817 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
818 {
819 .type = PSMOUSE_LIFEBOOK,
820 .name = "LBPS/2",
821 .alias = "lifebook",
822 .detect = lifebook_detect,
823 .init = lifebook_init,
824 },
825 #endif
826 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
827 {
828 .type = PSMOUSE_TRACKPOINT,
829 .name = "TPPS/2",
830 .alias = "trackpoint",
831 .detect = trackpoint_detect,
832 .try_passthru = true,
833 },
834 #endif
835 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
836 {
837 .type = PSMOUSE_TOUCHKIT_PS2,
838 .name = "touchkitPS/2",
839 .alias = "touchkit",
840 .detect = touchkit_ps2_detect,
841 },
842 #endif
843 #ifdef CONFIG_MOUSE_PS2_OLPC
844 {
845 .type = PSMOUSE_HGPK,
846 .name = "OLPC HGPK",
847 .alias = "hgpk",
848 .detect = hgpk_detect,
849 },
850 #endif
851 #ifdef CONFIG_MOUSE_PS2_ELANTECH
852 {
853 .type = PSMOUSE_ELANTECH,
854 .name = "ETPS/2",
855 .alias = "elantech",
856 .detect = elantech_detect,
857 .init = elantech_init_ps2,
858 },
859 #endif
860 #ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
861 {
862 .type = PSMOUSE_ELANTECH_SMBUS,
863 .name = "ETSMBus",
864 .alias = "elantech-smbus",
865 .detect = elantech_detect,
866 .init = elantech_init_smbus,
867 .smbus_companion = true,
868 },
869 #endif
870 #ifdef CONFIG_MOUSE_PS2_SENTELIC
871 {
872 .type = PSMOUSE_FSP,
873 .name = "FSPPS/2",
874 .alias = "fsp",
875 .detect = fsp_detect,
876 .init = fsp_init,
877 },
878 #endif
879 {
880 .type = PSMOUSE_CORTRON,
881 .name = "CortronPS/2",
882 .alias = "cortps",
883 .detect = cortron_detect,
884 },
885 #ifdef CONFIG_MOUSE_PS2_FOCALTECH
886 {
887 .type = PSMOUSE_FOCALTECH,
888 .name = "FocalTechPS/2",
889 .alias = "focaltech",
890 .detect = focaltech_detect,
891 .init = focaltech_init,
892 },
893 #endif
894 #ifdef CONFIG_MOUSE_PS2_VMMOUSE
895 {
896 .type = PSMOUSE_VMMOUSE,
897 .name = VMMOUSE_PSNAME,
898 .alias = "vmmouse",
899 .detect = vmmouse_detect,
900 .init = vmmouse_init,
901 },
902 #endif
903 #ifdef CONFIG_MOUSE_PS2_BYD
904 {
905 .type = PSMOUSE_BYD,
906 .name = "BYDPS/2",
907 .alias = "byd",
908 .detect = byd_detect,
909 .init = byd_init,
910 },
911 #endif
912 {
913 .type = PSMOUSE_AUTO,
914 .name = "auto",
915 .alias = "any",
916 .maxproto = true,
917 },
918 };
919
__psmouse_protocol_by_type(enum psmouse_type type)920 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
921 {
922 int i;
923
924 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
925 if (psmouse_protocols[i].type == type)
926 return &psmouse_protocols[i];
927
928 return NULL;
929 }
930
psmouse_protocol_by_type(enum psmouse_type type)931 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
932 {
933 const struct psmouse_protocol *proto;
934
935 proto = __psmouse_protocol_by_type(type);
936 if (proto)
937 return proto;
938
939 WARN_ON(1);
940 return &psmouse_protocols[0];
941 }
942
psmouse_protocol_by_name(const char * name,size_t len)943 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
944 {
945 const struct psmouse_protocol *p;
946 int i;
947
948 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
949 p = &psmouse_protocols[i];
950
951 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
952 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
953 return &psmouse_protocols[i];
954 }
955
956 return NULL;
957 }
958
959 /*
960 * Apply default settings to the psmouse structure. Most of them will
961 * be overridden by individual protocol initialization routines.
962 */
psmouse_apply_defaults(struct psmouse * psmouse)963 static void psmouse_apply_defaults(struct psmouse *psmouse)
964 {
965 struct input_dev *input_dev = psmouse->dev;
966
967 bitmap_zero(input_dev->evbit, EV_CNT);
968 bitmap_zero(input_dev->keybit, KEY_CNT);
969 bitmap_zero(input_dev->relbit, REL_CNT);
970 bitmap_zero(input_dev->absbit, ABS_CNT);
971 bitmap_zero(input_dev->mscbit, MSC_CNT);
972
973 input_set_capability(input_dev, EV_KEY, BTN_LEFT);
974 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
975
976 input_set_capability(input_dev, EV_REL, REL_X);
977 input_set_capability(input_dev, EV_REL, REL_Y);
978
979 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
980
981 psmouse->protocol = &psmouse_protocols[0];
982
983 psmouse->set_rate = psmouse_set_rate;
984 psmouse->set_resolution = psmouse_set_resolution;
985 psmouse->set_scale = psmouse_set_scale;
986 psmouse->poll = psmouse_poll;
987 psmouse->protocol_handler = psmouse_process_byte;
988 psmouse->pktsize = 3;
989 psmouse->reconnect = NULL;
990 psmouse->fast_reconnect = NULL;
991 psmouse->disconnect = NULL;
992 psmouse->cleanup = NULL;
993 psmouse->pt_activate = NULL;
994 psmouse->pt_deactivate = NULL;
995 }
996
psmouse_do_detect(int (* detect)(struct psmouse *,bool),struct psmouse * psmouse,bool allow_passthrough,bool set_properties)997 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
998 struct psmouse *psmouse, bool allow_passthrough,
999 bool set_properties)
1000 {
1001 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
1002 !allow_passthrough) {
1003 return false;
1004 }
1005
1006 if (set_properties)
1007 psmouse_apply_defaults(psmouse);
1008
1009 return detect(psmouse, set_properties) == 0;
1010 }
1011
psmouse_try_protocol(struct psmouse * psmouse,enum psmouse_type type,unsigned int * max_proto,bool set_properties,bool init_allowed)1012 static bool psmouse_try_protocol(struct psmouse *psmouse,
1013 enum psmouse_type type,
1014 unsigned int *max_proto,
1015 bool set_properties, bool init_allowed)
1016 {
1017 const struct psmouse_protocol *proto;
1018
1019 proto = __psmouse_protocol_by_type(type);
1020 if (!proto)
1021 return false;
1022
1023 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
1024 set_properties))
1025 return false;
1026
1027 if (set_properties && proto->init && init_allowed) {
1028 if (proto->init(psmouse) != 0) {
1029 /*
1030 * We detected device, but init failed. Adjust
1031 * max_proto so we only try standard protocols.
1032 */
1033 if (*max_proto > PSMOUSE_IMEX)
1034 *max_proto = PSMOUSE_IMEX;
1035
1036 return false;
1037 }
1038 }
1039
1040 return true;
1041 }
1042
1043 /*
1044 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
1045 * the mouse may have.
1046 */
psmouse_extensions(struct psmouse * psmouse,unsigned int max_proto,bool set_properties)1047 static int psmouse_extensions(struct psmouse *psmouse,
1048 unsigned int max_proto, bool set_properties)
1049 {
1050 bool synaptics_hardware = false;
1051 int ret;
1052
1053 /*
1054 * Always check for focaltech, this is safe as it uses pnp-id
1055 * matching.
1056 */
1057 if (psmouse_do_detect(focaltech_detect,
1058 psmouse, false, set_properties)) {
1059 if (max_proto > PSMOUSE_IMEX &&
1060 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
1061 (!set_properties || focaltech_init(psmouse) == 0)) {
1062 return PSMOUSE_FOCALTECH;
1063 }
1064 /*
1065 * Restrict psmouse_max_proto so that psmouse_initialize()
1066 * does not try to reset rate and resolution, because even
1067 * that upsets the device.
1068 * This also causes us to basically fall through to basic
1069 * protocol detection, where we fully reset the mouse,
1070 * and set it up as bare PS/2 protocol device.
1071 */
1072 psmouse_max_proto = max_proto = PSMOUSE_PS2;
1073 }
1074
1075 /*
1076 * We always check for LifeBook because it does not disturb mouse
1077 * (it only checks DMI information).
1078 */
1079 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
1080 set_properties, max_proto > PSMOUSE_IMEX))
1081 return PSMOUSE_LIFEBOOK;
1082
1083 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
1084 set_properties, max_proto > PSMOUSE_IMEX))
1085 return PSMOUSE_VMMOUSE;
1086
1087 /*
1088 * Try Kensington ThinkingMouse (we try first, because Synaptics
1089 * probe upsets the ThinkingMouse).
1090 */
1091 if (max_proto > PSMOUSE_IMEX &&
1092 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
1093 set_properties, true)) {
1094 return PSMOUSE_THINKPS;
1095 }
1096
1097 /*
1098 * Try Synaptics TouchPad. Note that probing is done even if
1099 * Synaptics protocol support is disabled in config - we need to
1100 * know if it is Synaptics so we can reset it properly after
1101 * probing for IntelliMouse.
1102 */
1103 if (max_proto > PSMOUSE_PS2 &&
1104 psmouse_do_detect(synaptics_detect,
1105 psmouse, false, set_properties)) {
1106 synaptics_hardware = true;
1107
1108 if (max_proto > PSMOUSE_IMEX) {
1109 /*
1110 * Try activating protocol, but check if support is
1111 * enabled first, since we try detecting Synaptics
1112 * even when protocol is disabled.
1113 */
1114 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
1115 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
1116 if (!set_properties)
1117 return PSMOUSE_SYNAPTICS;
1118
1119 ret = synaptics_init(psmouse);
1120 if (ret >= 0)
1121 return ret;
1122 }
1123
1124 /*
1125 * Some Synaptics touchpads can emulate extended
1126 * protocols (like IMPS/2). Unfortunately
1127 * Logitech/Genius probes confuse some firmware
1128 * versions so we'll have to skip them.
1129 */
1130 max_proto = PSMOUSE_IMEX;
1131 }
1132
1133 /*
1134 * Make sure that touchpad is in relative mode, gestures
1135 * (taps) are enabled.
1136 */
1137 synaptics_reset(psmouse);
1138 }
1139
1140 /*
1141 * Try Cypress Trackpad. We must try it before Finger Sensing Pad
1142 * because Finger Sensing Pad probe upsets some modules of Cypress
1143 * Trackpads.
1144 */
1145 if (max_proto > PSMOUSE_IMEX &&
1146 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
1147 set_properties, true)) {
1148 return PSMOUSE_CYPRESS;
1149 }
1150
1151 /* Try ALPS TouchPad */
1152 if (max_proto > PSMOUSE_IMEX) {
1153 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1154 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
1155 &max_proto, set_properties, true))
1156 return PSMOUSE_ALPS;
1157 }
1158
1159 /* Try OLPC HGPK touchpad */
1160 if (max_proto > PSMOUSE_IMEX &&
1161 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
1162 set_properties, true)) {
1163 return PSMOUSE_HGPK;
1164 }
1165
1166 /* Try Elantech touchpad */
1167 if (max_proto > PSMOUSE_IMEX &&
1168 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
1169 &max_proto, set_properties, false)) {
1170 if (!set_properties)
1171 return PSMOUSE_ELANTECH;
1172
1173 ret = elantech_init(psmouse);
1174 if (ret >= 0)
1175 return ret;
1176 }
1177
1178 if (max_proto > PSMOUSE_IMEX) {
1179 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
1180 &max_proto, set_properties, true))
1181 return PSMOUSE_GENPS;
1182
1183 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
1184 &max_proto, set_properties, true))
1185 return PSMOUSE_PS2PP;
1186
1187 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
1188 &max_proto, set_properties, true))
1189 return PSMOUSE_TRACKPOINT;
1190
1191 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
1192 &max_proto, set_properties, true))
1193 return PSMOUSE_TOUCHKIT_PS2;
1194 }
1195
1196 /*
1197 * Try Finger Sensing Pad. We do it here because its probe upsets
1198 * Trackpoint devices (causing TP_READ_ID command to time out).
1199 */
1200 if (max_proto > PSMOUSE_IMEX &&
1201 psmouse_try_protocol(psmouse, PSMOUSE_FSP,
1202 &max_proto, set_properties, true)) {
1203 return PSMOUSE_FSP;
1204 }
1205
1206 /*
1207 * Reset to defaults in case the device got confused by extended
1208 * protocol probes. Note that we follow up with full reset because
1209 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
1210 */
1211 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1212 psmouse_reset(psmouse);
1213
1214 if (max_proto >= PSMOUSE_IMEX &&
1215 psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
1216 &max_proto, set_properties, true)) {
1217 return PSMOUSE_IMEX;
1218 }
1219
1220 if (max_proto >= PSMOUSE_IMPS &&
1221 psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
1222 &max_proto, set_properties, true)) {
1223 return PSMOUSE_IMPS;
1224 }
1225
1226 /*
1227 * Okay, all failed, we have a standard mouse here. The number of
1228 * the buttons is still a question, though. We assume 3.
1229 */
1230 psmouse_try_protocol(psmouse, PSMOUSE_PS2,
1231 &max_proto, set_properties, true);
1232
1233 if (synaptics_hardware) {
1234 /*
1235 * We detected Synaptics hardware but it did not respond to
1236 * IMPS/2 probes. We need to reset the touchpad because if
1237 * there is a track point on the pass through port it could
1238 * get disabled while probing for protocol extensions.
1239 */
1240 psmouse_reset(psmouse);
1241 }
1242
1243 return PSMOUSE_PS2;
1244 }
1245
1246 /*
1247 * psmouse_probe() probes for a PS/2 mouse.
1248 */
psmouse_probe(struct psmouse * psmouse)1249 static int psmouse_probe(struct psmouse *psmouse)
1250 {
1251 struct ps2dev *ps2dev = &psmouse->ps2dev;
1252 u8 param[2];
1253 int error;
1254
1255 /*
1256 * First, we check if it's a mouse. It should send 0x00 or 0x03 in
1257 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1258 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
1259 * subsequent ID queries, probably due to a firmware bug.
1260 */
1261 param[0] = 0xa5;
1262 error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
1263 if (error)
1264 return error;
1265
1266 if (param[0] != 0x00 && param[0] != 0x03 &&
1267 param[0] != 0x04 && param[0] != 0xff)
1268 return -ENODEV;
1269
1270 /*
1271 * Then we reset and disable the mouse so that it doesn't generate
1272 * events.
1273 */
1274 error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1275 if (error)
1276 psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
1277 ps2dev->serio->phys, error);
1278
1279 return 0;
1280 }
1281
1282 /*
1283 * psmouse_initialize() initializes the mouse to a sane state.
1284 */
psmouse_initialize(struct psmouse * psmouse)1285 static void psmouse_initialize(struct psmouse *psmouse)
1286 {
1287 /*
1288 * We set the mouse report rate, resolution and scaling.
1289 */
1290 if (psmouse_max_proto != PSMOUSE_PS2) {
1291 psmouse->set_rate(psmouse, psmouse->rate);
1292 psmouse->set_resolution(psmouse, psmouse->resolution);
1293 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1294 }
1295 }
1296
1297 /*
1298 * psmouse_activate() enables the mouse so that we get motion reports from it.
1299 */
psmouse_activate(struct psmouse * psmouse)1300 int psmouse_activate(struct psmouse *psmouse)
1301 {
1302 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1303 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1304 psmouse->ps2dev.serio->phys);
1305 return -1;
1306 }
1307
1308 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1309 return 0;
1310 }
1311
1312 /*
1313 * psmouse_deactivate() puts the mouse into poll mode so that we don't get
1314 * motion reports from it unless we explicitly request it.
1315 */
psmouse_deactivate(struct psmouse * psmouse)1316 int psmouse_deactivate(struct psmouse *psmouse)
1317 {
1318 int error;
1319
1320 error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
1321 if (error) {
1322 psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
1323 psmouse->ps2dev.serio->phys, error);
1324 return error;
1325 }
1326
1327 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1328 return 0;
1329 }
1330
1331 /*
1332 * psmouse_resync() attempts to re-validate current protocol.
1333 */
psmouse_resync(struct work_struct * work)1334 static void psmouse_resync(struct work_struct *work)
1335 {
1336 struct psmouse *parent = NULL, *psmouse =
1337 container_of(work, struct psmouse, resync_work.work);
1338 struct serio *serio = psmouse->ps2dev.serio;
1339 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1340 bool failed = false, enabled = false;
1341 int i;
1342
1343 mutex_lock(&psmouse_mutex);
1344
1345 if (psmouse->state != PSMOUSE_RESYNCING)
1346 goto out;
1347
1348 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1349 parent = serio_get_drvdata(serio->parent);
1350 psmouse_deactivate(parent);
1351 }
1352
1353 /*
1354 * Some mice don't ACK commands sent while they are in the middle of
1355 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1356 * instead of ps2_command() which would wait for 200ms for an ACK
1357 * that may never come.
1358 * As an additional quirk ALPS touchpads may not only forget to ACK
1359 * disable command but will stop reporting taps, so if we see that
1360 * mouse at least once ACKs disable we will do full reconnect if ACK
1361 * is missing.
1362 */
1363 psmouse->num_resyncs++;
1364
1365 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1366 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1367 failed = true;
1368 } else
1369 psmouse->acks_disable_command = true;
1370
1371 /*
1372 * Poll the mouse. If it was reset the packet will be shorter than
1373 * psmouse->pktsize and ps2_command will fail. We do not expect and
1374 * do not handle scenario when mouse "upgrades" its protocol while
1375 * disconnected since it would require additional delay. If we ever
1376 * see a mouse that does it we'll adjust the code.
1377 */
1378 if (!failed) {
1379 if (psmouse->poll(psmouse))
1380 failed = true;
1381 else {
1382 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1383 for (i = 0; i < psmouse->pktsize; i++) {
1384 psmouse->pktcnt++;
1385 rc = psmouse->protocol_handler(psmouse);
1386 if (rc != PSMOUSE_GOOD_DATA)
1387 break;
1388 }
1389 if (rc != PSMOUSE_FULL_PACKET)
1390 failed = true;
1391 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1392 }
1393 }
1394
1395 /*
1396 * Now try to enable mouse. We try to do that even if poll failed
1397 * and also repeat our attempts 5 times, otherwise we may be left
1398 * out with disabled mouse.
1399 */
1400 for (i = 0; i < 5; i++) {
1401 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1402 enabled = true;
1403 break;
1404 }
1405 msleep(200);
1406 }
1407
1408 if (!enabled) {
1409 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1410 psmouse->ps2dev.serio->phys);
1411 failed = true;
1412 }
1413
1414 if (failed) {
1415 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1416 psmouse_info(psmouse,
1417 "resync failed, issuing reconnect request\n");
1418 serio_reconnect(serio);
1419 } else
1420 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1421
1422 if (parent)
1423 psmouse_activate(parent);
1424 out:
1425 mutex_unlock(&psmouse_mutex);
1426 }
1427
1428 /*
1429 * psmouse_cleanup() resets the mouse into power-on state.
1430 */
psmouse_cleanup(struct serio * serio)1431 static void psmouse_cleanup(struct serio *serio)
1432 {
1433 struct psmouse *psmouse = serio_get_drvdata(serio);
1434 struct psmouse *parent = NULL;
1435
1436 mutex_lock(&psmouse_mutex);
1437
1438 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1439 parent = serio_get_drvdata(serio->parent);
1440 psmouse_deactivate(parent);
1441 }
1442
1443 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1444
1445 /*
1446 * Disable stream mode so cleanup routine can proceed undisturbed.
1447 */
1448 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1449 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1450 psmouse->ps2dev.serio->phys);
1451
1452 if (psmouse->cleanup)
1453 psmouse->cleanup(psmouse);
1454
1455 /*
1456 * Reset the mouse to defaults (bare PS/2 protocol).
1457 */
1458 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1459
1460 /*
1461 * Some boxes, such as HP nx7400, get terribly confused if mouse
1462 * is not fully enabled before suspending/shutting down.
1463 */
1464 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1465
1466 if (parent) {
1467 if (parent->pt_deactivate)
1468 parent->pt_deactivate(parent);
1469
1470 psmouse_activate(parent);
1471 }
1472
1473 mutex_unlock(&psmouse_mutex);
1474 }
1475
1476 /*
1477 * psmouse_disconnect() closes and frees.
1478 */
psmouse_disconnect(struct serio * serio)1479 static void psmouse_disconnect(struct serio *serio)
1480 {
1481 struct psmouse *psmouse = serio_get_drvdata(serio);
1482 struct psmouse *parent = NULL;
1483
1484 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1485
1486 mutex_lock(&psmouse_mutex);
1487
1488 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1489
1490 /* make sure we don't have a resync in progress */
1491 mutex_unlock(&psmouse_mutex);
1492 flush_workqueue(kpsmoused_wq);
1493 mutex_lock(&psmouse_mutex);
1494
1495 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1496 parent = serio_get_drvdata(serio->parent);
1497 psmouse_deactivate(parent);
1498 }
1499
1500 if (psmouse->disconnect)
1501 psmouse->disconnect(psmouse);
1502
1503 if (parent && parent->pt_deactivate)
1504 parent->pt_deactivate(parent);
1505
1506 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1507
1508 serio_close(serio);
1509 serio_set_drvdata(serio, NULL);
1510
1511 if (psmouse->dev)
1512 input_unregister_device(psmouse->dev);
1513
1514 kfree(psmouse);
1515
1516 if (parent)
1517 psmouse_activate(parent);
1518
1519 mutex_unlock(&psmouse_mutex);
1520 }
1521
psmouse_switch_protocol(struct psmouse * psmouse,const struct psmouse_protocol * proto)1522 static int psmouse_switch_protocol(struct psmouse *psmouse,
1523 const struct psmouse_protocol *proto)
1524 {
1525 const struct psmouse_protocol *selected_proto;
1526 struct input_dev *input_dev = psmouse->dev;
1527 enum psmouse_type type;
1528
1529 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1530
1531 if (proto && (proto->detect || proto->init)) {
1532 psmouse_apply_defaults(psmouse);
1533
1534 if (proto->detect && proto->detect(psmouse, true) < 0)
1535 return -1;
1536
1537 if (proto->init && proto->init(psmouse) < 0)
1538 return -1;
1539
1540 selected_proto = proto;
1541 } else {
1542 type = psmouse_extensions(psmouse, psmouse_max_proto, true);
1543 selected_proto = psmouse_protocol_by_type(type);
1544 }
1545
1546 psmouse->protocol = selected_proto;
1547
1548 /*
1549 * If mouse's packet size is 3 there is no point in polling the
1550 * device in hopes to detect protocol reset - we won't get less
1551 * than 3 bytes response anyhow.
1552 */
1553 if (psmouse->pktsize == 3)
1554 psmouse->resync_time = 0;
1555
1556 /*
1557 * Some smart KVMs fake response to POLL command returning just
1558 * 3 bytes and messing up our resync logic, so if initial poll
1559 * fails we won't try polling the device anymore. Hopefully
1560 * such KVM will maintain initially selected protocol.
1561 */
1562 if (psmouse->resync_time && psmouse->poll(psmouse))
1563 psmouse->resync_time = 0;
1564
1565 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1566 selected_proto->name, psmouse->vendor, psmouse->name);
1567
1568 input_dev->name = psmouse->devname;
1569 input_dev->phys = psmouse->phys;
1570 input_dev->id.bustype = BUS_I8042;
1571 input_dev->id.vendor = 0x0002;
1572 input_dev->id.product = psmouse->protocol->type;
1573 input_dev->id.version = psmouse->model;
1574
1575 return 0;
1576 }
1577
1578 /*
1579 * psmouse_connect() is a callback from the serio module when
1580 * an unhandled serio port is found.
1581 */
psmouse_connect(struct serio * serio,struct serio_driver * drv)1582 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1583 {
1584 struct psmouse *psmouse, *parent = NULL;
1585 struct input_dev *input_dev;
1586 int retval = 0, error = -ENOMEM;
1587
1588 mutex_lock(&psmouse_mutex);
1589
1590 /*
1591 * If this is a pass-through port deactivate parent so the device
1592 * connected to this port can be successfully identified
1593 */
1594 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1595 parent = serio_get_drvdata(serio->parent);
1596 psmouse_deactivate(parent);
1597 }
1598
1599 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1600 input_dev = input_allocate_device();
1601 if (!psmouse || !input_dev)
1602 goto err_free;
1603
1604 ps2_init(&psmouse->ps2dev, serio);
1605 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1606 psmouse->dev = input_dev;
1607 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1608
1609 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1610
1611 serio_set_drvdata(serio, psmouse);
1612
1613 error = serio_open(serio, drv);
1614 if (error)
1615 goto err_clear_drvdata;
1616
1617 /* give PT device some time to settle down before probing */
1618 if (serio->id.type == SERIO_PS_PSTHRU)
1619 usleep_range(10000, 15000);
1620
1621 if (psmouse_probe(psmouse) < 0) {
1622 error = -ENODEV;
1623 goto err_close_serio;
1624 }
1625
1626 psmouse->rate = psmouse_rate;
1627 psmouse->resolution = psmouse_resolution;
1628 psmouse->resetafter = psmouse_resetafter;
1629 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1630 psmouse->smartscroll = psmouse_smartscroll;
1631
1632 psmouse_switch_protocol(psmouse, NULL);
1633
1634 if (!psmouse->protocol->smbus_companion) {
1635 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1636 psmouse_initialize(psmouse);
1637
1638 error = input_register_device(input_dev);
1639 if (error)
1640 goto err_protocol_disconnect;
1641 } else {
1642 /* Smbus companion will be reporting events, not us. */
1643 input_free_device(input_dev);
1644 psmouse->dev = input_dev = NULL;
1645 }
1646
1647 if (parent && parent->pt_activate)
1648 parent->pt_activate(parent);
1649
1650 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1651 if (error)
1652 goto err_pt_deactivate;
1653
1654 /*
1655 * PS/2 devices having SMBus companions should stay disabled
1656 * on PS/2 side, in order to have SMBus part operable.
1657 */
1658 if (!psmouse->protocol->smbus_companion)
1659 psmouse_activate(psmouse);
1660
1661 out:
1662 /* If this is a pass-through port the parent needs to be re-activated */
1663 if (parent)
1664 psmouse_activate(parent);
1665
1666 mutex_unlock(&psmouse_mutex);
1667 return retval;
1668
1669 err_pt_deactivate:
1670 if (parent && parent->pt_deactivate)
1671 parent->pt_deactivate(parent);
1672 if (input_dev) {
1673 input_unregister_device(input_dev);
1674 input_dev = NULL; /* so we don't try to free it below */
1675 }
1676 err_protocol_disconnect:
1677 if (psmouse->disconnect)
1678 psmouse->disconnect(psmouse);
1679 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1680 err_close_serio:
1681 serio_close(serio);
1682 err_clear_drvdata:
1683 serio_set_drvdata(serio, NULL);
1684 err_free:
1685 input_free_device(input_dev);
1686 kfree(psmouse);
1687
1688 retval = error;
1689 goto out;
1690 }
1691
__psmouse_reconnect(struct serio * serio,bool fast_reconnect)1692 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
1693 {
1694 struct psmouse *psmouse = serio_get_drvdata(serio);
1695 struct psmouse *parent = NULL;
1696 int (*reconnect_handler)(struct psmouse *);
1697 enum psmouse_type type;
1698 int rc = -1;
1699
1700 mutex_lock(&psmouse_mutex);
1701
1702 if (fast_reconnect) {
1703 reconnect_handler = psmouse->fast_reconnect;
1704 if (!reconnect_handler) {
1705 rc = -ENOENT;
1706 goto out_unlock;
1707 }
1708 } else {
1709 reconnect_handler = psmouse->reconnect;
1710 }
1711
1712 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1713 parent = serio_get_drvdata(serio->parent);
1714 psmouse_deactivate(parent);
1715 }
1716
1717 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1718
1719 if (reconnect_handler) {
1720 if (reconnect_handler(psmouse))
1721 goto out;
1722 } else {
1723 psmouse_reset(psmouse);
1724
1725 if (psmouse_probe(psmouse) < 0)
1726 goto out;
1727
1728 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1729 if (psmouse->protocol->type != type)
1730 goto out;
1731 }
1732
1733 /*
1734 * OK, the device type (and capabilities) match the old one,
1735 * we can continue using it, complete initialization
1736 */
1737 if (!psmouse->protocol->smbus_companion) {
1738 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1739 psmouse_initialize(psmouse);
1740 }
1741
1742 if (parent && parent->pt_activate)
1743 parent->pt_activate(parent);
1744
1745 /*
1746 * PS/2 devices having SMBus companions should stay disabled
1747 * on PS/2 side, in order to have SMBus part operable.
1748 */
1749 if (!psmouse->protocol->smbus_companion)
1750 psmouse_activate(psmouse);
1751
1752 rc = 0;
1753
1754 out:
1755 /* If this is a pass-through port the parent waits to be activated */
1756 if (parent)
1757 psmouse_activate(parent);
1758
1759 out_unlock:
1760 mutex_unlock(&psmouse_mutex);
1761 return rc;
1762 }
1763
psmouse_reconnect(struct serio * serio)1764 static int psmouse_reconnect(struct serio *serio)
1765 {
1766 return __psmouse_reconnect(serio, false);
1767 }
1768
psmouse_fast_reconnect(struct serio * serio)1769 static int psmouse_fast_reconnect(struct serio *serio)
1770 {
1771 return __psmouse_reconnect(serio, true);
1772 }
1773
1774 static struct serio_device_id psmouse_serio_ids[] = {
1775 {
1776 .type = SERIO_8042,
1777 .proto = SERIO_ANY,
1778 .id = SERIO_ANY,
1779 .extra = SERIO_ANY,
1780 },
1781 {
1782 .type = SERIO_PS_PSTHRU,
1783 .proto = SERIO_ANY,
1784 .id = SERIO_ANY,
1785 .extra = SERIO_ANY,
1786 },
1787 { 0 }
1788 };
1789
1790 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1791
1792 static struct serio_driver psmouse_drv = {
1793 .driver = {
1794 .name = "psmouse",
1795 },
1796 .description = DRIVER_DESC,
1797 .id_table = psmouse_serio_ids,
1798 .interrupt = psmouse_interrupt,
1799 .connect = psmouse_connect,
1800 .reconnect = psmouse_reconnect,
1801 .fast_reconnect = psmouse_fast_reconnect,
1802 .disconnect = psmouse_disconnect,
1803 .cleanup = psmouse_cleanup,
1804 };
1805
psmouse_attr_show_helper(struct device * dev,struct device_attribute * devattr,char * buf)1806 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1807 char *buf)
1808 {
1809 struct serio *serio = to_serio_port(dev);
1810 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1811 struct psmouse *psmouse = serio_get_drvdata(serio);
1812
1813 if (psmouse->protocol->smbus_companion &&
1814 devattr != &psmouse_attr_protocol.dattr)
1815 return -ENOENT;
1816
1817 return attr->show(psmouse, attr->data, buf);
1818 }
1819
psmouse_attr_set_helper(struct device * dev,struct device_attribute * devattr,const char * buf,size_t count)1820 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1821 const char *buf, size_t count)
1822 {
1823 struct serio *serio = to_serio_port(dev);
1824 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1825 struct psmouse *psmouse, *parent = NULL;
1826 int retval;
1827
1828 retval = mutex_lock_interruptible(&psmouse_mutex);
1829 if (retval)
1830 goto out;
1831
1832 psmouse = serio_get_drvdata(serio);
1833
1834 if (psmouse->protocol->smbus_companion &&
1835 devattr != &psmouse_attr_protocol.dattr) {
1836 retval = -ENOENT;
1837 goto out_unlock;
1838 }
1839
1840 if (attr->protect) {
1841 if (psmouse->state == PSMOUSE_IGNORE) {
1842 retval = -ENODEV;
1843 goto out_unlock;
1844 }
1845
1846 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1847 parent = serio_get_drvdata(serio->parent);
1848 psmouse_deactivate(parent);
1849 }
1850
1851 if (!psmouse->protocol->smbus_companion)
1852 psmouse_deactivate(psmouse);
1853 }
1854
1855 retval = attr->set(psmouse, attr->data, buf, count);
1856
1857 if (attr->protect) {
1858 if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
1859 psmouse_activate(psmouse);
1860
1861 if (parent)
1862 psmouse_activate(parent);
1863 }
1864
1865 out_unlock:
1866 mutex_unlock(&psmouse_mutex);
1867 out:
1868 return retval;
1869 }
1870
psmouse_show_int_attr(struct psmouse * psmouse,void * offset,char * buf)1871 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1872 {
1873 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1874
1875 return sprintf(buf, "%u\n", *field);
1876 }
1877
psmouse_set_int_attr(struct psmouse * psmouse,void * offset,const char * buf,size_t count)1878 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1879 {
1880 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1881 unsigned int value;
1882 int err;
1883
1884 err = kstrtouint(buf, 10, &value);
1885 if (err)
1886 return err;
1887
1888 *field = value;
1889
1890 return count;
1891 }
1892
psmouse_attr_show_protocol(struct psmouse * psmouse,void * data,char * buf)1893 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1894 {
1895 return sprintf(buf, "%s\n", psmouse->protocol->name);
1896 }
1897
psmouse_attr_set_protocol(struct psmouse * psmouse,void * data,const char * buf,size_t count)1898 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1899 {
1900 struct serio *serio = psmouse->ps2dev.serio;
1901 struct psmouse *parent = NULL;
1902 struct input_dev *old_dev, *new_dev;
1903 const struct psmouse_protocol *proto, *old_proto;
1904 int error;
1905 int retry = 0;
1906
1907 proto = psmouse_protocol_by_name(buf, count);
1908 if (!proto)
1909 return -EINVAL;
1910
1911 if (psmouse->protocol == proto)
1912 return count;
1913
1914 new_dev = input_allocate_device();
1915 if (!new_dev)
1916 return -ENOMEM;
1917
1918 while (!list_empty(&serio->children)) {
1919 if (++retry > 3) {
1920 psmouse_warn(psmouse,
1921 "failed to destroy children ports, protocol change aborted.\n");
1922 input_free_device(new_dev);
1923 return -EIO;
1924 }
1925
1926 mutex_unlock(&psmouse_mutex);
1927 serio_unregister_child_port(serio);
1928 mutex_lock(&psmouse_mutex);
1929
1930 if (serio->drv != &psmouse_drv) {
1931 input_free_device(new_dev);
1932 return -ENODEV;
1933 }
1934
1935 if (psmouse->protocol == proto) {
1936 input_free_device(new_dev);
1937 return count; /* switched by other thread */
1938 }
1939 }
1940
1941 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1942 parent = serio_get_drvdata(serio->parent);
1943 if (parent->pt_deactivate)
1944 parent->pt_deactivate(parent);
1945 }
1946
1947 old_dev = psmouse->dev;
1948 old_proto = psmouse->protocol;
1949
1950 if (psmouse->disconnect)
1951 psmouse->disconnect(psmouse);
1952
1953 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1954
1955 psmouse->dev = new_dev;
1956 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1957
1958 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1959 psmouse_reset(psmouse);
1960 /* default to PSMOUSE_PS2 */
1961 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1962 }
1963
1964 psmouse_initialize(psmouse);
1965 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1966
1967 if (psmouse->protocol->smbus_companion) {
1968 input_free_device(psmouse->dev);
1969 psmouse->dev = NULL;
1970 } else {
1971 error = input_register_device(psmouse->dev);
1972 if (error) {
1973 if (psmouse->disconnect)
1974 psmouse->disconnect(psmouse);
1975
1976 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1977 input_free_device(new_dev);
1978 psmouse->dev = old_dev;
1979 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1980 psmouse_switch_protocol(psmouse, old_proto);
1981 psmouse_initialize(psmouse);
1982 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1983
1984 return error;
1985 }
1986 }
1987
1988 if (old_dev)
1989 input_unregister_device(old_dev);
1990
1991 if (parent && parent->pt_activate)
1992 parent->pt_activate(parent);
1993
1994 return count;
1995 }
1996
psmouse_attr_set_rate(struct psmouse * psmouse,void * data,const char * buf,size_t count)1997 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1998 {
1999 unsigned int value;
2000 int err;
2001
2002 err = kstrtouint(buf, 10, &value);
2003 if (err)
2004 return err;
2005
2006 psmouse->set_rate(psmouse, value);
2007 return count;
2008 }
2009
psmouse_attr_set_resolution(struct psmouse * psmouse,void * data,const char * buf,size_t count)2010 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
2011 {
2012 unsigned int value;
2013 int err;
2014
2015 err = kstrtouint(buf, 10, &value);
2016 if (err)
2017 return err;
2018
2019 psmouse->set_resolution(psmouse, value);
2020 return count;
2021 }
2022
2023
psmouse_set_maxproto(const char * val,const struct kernel_param * kp)2024 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
2025 {
2026 const struct psmouse_protocol *proto;
2027
2028 if (!val)
2029 return -EINVAL;
2030
2031 proto = psmouse_protocol_by_name(val, strlen(val));
2032
2033 if (!proto || !proto->maxproto)
2034 return -EINVAL;
2035
2036 *((unsigned int *)kp->arg) = proto->type;
2037
2038 return 0;
2039 }
2040
psmouse_get_maxproto(char * buffer,const struct kernel_param * kp)2041 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
2042 {
2043 int type = *((unsigned int *)kp->arg);
2044
2045 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
2046 }
2047
psmouse_init(void)2048 static int __init psmouse_init(void)
2049 {
2050 int err;
2051
2052 lifebook_module_init();
2053 synaptics_module_init();
2054 hgpk_module_init();
2055
2056 err = psmouse_smbus_module_init();
2057 if (err)
2058 return err;
2059
2060 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
2061 if (!kpsmoused_wq) {
2062 pr_err("failed to create kpsmoused workqueue\n");
2063 err = -ENOMEM;
2064 goto err_smbus_exit;
2065 }
2066
2067 err = serio_register_driver(&psmouse_drv);
2068 if (err)
2069 goto err_destroy_wq;
2070
2071 return 0;
2072
2073 err_destroy_wq:
2074 destroy_workqueue(kpsmoused_wq);
2075 err_smbus_exit:
2076 psmouse_smbus_module_exit();
2077 return err;
2078 }
2079
psmouse_exit(void)2080 static void __exit psmouse_exit(void)
2081 {
2082 serio_unregister_driver(&psmouse_drv);
2083 destroy_workqueue(kpsmoused_wq);
2084 psmouse_smbus_module_exit();
2085 }
2086
2087 module_init(psmouse_init);
2088 module_exit(psmouse_exit);
2089