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Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6/verdex.git] / drivers / input / mouse / psmouse-base.c
blob9fb7eb6b0f71f3bb9f5d7972e99627146a463fa7
1 /*
2 * PS/2 mouse driver
3 *
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2003-2004 Dmitry Torokhov
6 */
7
8 /*
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/slab.h>
18 #include <linux/interrupt.h>
19 #include <linux/input.h>
20 #include <linux/serio.h>
21 #include <linux/init.h>
22 #include <linux/libps2.h>
23 #include <linux/mutex.h>
24
25 #include "psmouse.h"
26 #include "synaptics.h"
27 #include "logips2pp.h"
28 #include "alps.h"
29 #include "lifebook.h"
30 #include "trackpoint.h"
31
32 #define DRIVER_DESC "PS/2 mouse driver"
33
34 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
35 MODULE_DESCRIPTION(DRIVER_DESC);
36 MODULE_LICENSE("GPL");
37
38 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
39 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
40 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
41 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
42 #define param_set_proto_abbrev psmouse_set_maxproto
43 #define param_get_proto_abbrev psmouse_get_maxproto
44 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
45 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
46
47 static unsigned int psmouse_resolution = 200;
48 module_param_named(resolution, psmouse_resolution, uint, 0644);
49 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
50
51 static unsigned int psmouse_rate = 100;
52 module_param_named(rate, psmouse_rate, uint, 0644);
53 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
54
55 static unsigned int psmouse_smartscroll = 1;
56 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
57 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
58
59 static unsigned int psmouse_resetafter = 5;
60 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
61 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
62
63 static unsigned int psmouse_resync_time;
64 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
65 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
66
67 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
68 NULL,
69 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
70 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
71 (void *) offsetof(struct psmouse, rate),
72 psmouse_show_int_attr, psmouse_attr_set_rate);
73 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
74 (void *) offsetof(struct psmouse, resolution),
75 psmouse_show_int_attr, psmouse_attr_set_resolution);
76 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
77 (void *) offsetof(struct psmouse, resetafter),
78 psmouse_show_int_attr, psmouse_set_int_attr);
79 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
80 (void *) offsetof(struct psmouse, resync_time),
81 psmouse_show_int_attr, psmouse_set_int_attr);
82
83 static struct attribute *psmouse_attributes[] = {
84 &psmouse_attr_protocol.dattr.attr,
85 &psmouse_attr_rate.dattr.attr,
86 &psmouse_attr_resolution.dattr.attr,
87 &psmouse_attr_resetafter.dattr.attr,
88 &psmouse_attr_resync_time.dattr.attr,
89 NULL
90 };
91
92 static struct attribute_group psmouse_attribute_group = {
93 .attrs = psmouse_attributes,
94 };
95
96 __obsolete_setup("psmouse_noext");
97 __obsolete_setup("psmouse_resolution=");
98 __obsolete_setup("psmouse_smartscroll=");
99 __obsolete_setup("psmouse_resetafter=");
100 __obsolete_setup("psmouse_rate=");
101
102 /*
103 * psmouse_mutex protects all operations changing state of mouse
104 * (connecting, disconnecting, changing rate or resolution via
105 * sysfs). We could use a per-device semaphore but since there
106 * rarely more than one PS/2 mouse connected and since semaphore
107 * is taken in "slow" paths it is not worth it.
108 */
109 static DEFINE_MUTEX(psmouse_mutex);
110
111 static struct workqueue_struct *kpsmoused_wq;
112
113 struct psmouse_protocol {
114 enum psmouse_type type;
115 const char *name;
116 const char *alias;
117 int maxproto;
118 int (*detect)(struct psmouse *, int);
119 int (*init)(struct psmouse *);
120 };
121
122 /*
123 * psmouse_process_byte() analyzes the PS/2 data stream and reports
124 * relevant events to the input module once full packet has arrived.
125 */
126
127 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
128 {
129 struct input_dev *dev = psmouse->dev;
130 unsigned char *packet = psmouse->packet;
131
132 if (psmouse->pktcnt < psmouse->pktsize)
133 return PSMOUSE_GOOD_DATA;
134
135 /*
136 * Full packet accumulated, process it
137 */
138
139 input_regs(dev, regs);
140
141 /*
142 * Scroll wheel on IntelliMice, scroll buttons on NetMice
143 */
144
145 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
146 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
147
148 /*
149 * Scroll wheel and buttons on IntelliMouse Explorer
150 */
151
152 if (psmouse->type == PSMOUSE_IMEX) {
153 switch (packet[3] & 0xC0) {
154 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
155 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
156 break;
157 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
158 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
159 break;
160 case 0x00:
161 case 0xC0:
162 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
163 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
164 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
165 break;
166 }
167 }
168
169 /*
170 * Extra buttons on Genius NewNet 3D
171 */
172
173 if (psmouse->type == PSMOUSE_GENPS) {
174 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
175 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
176 }
177
178 /*
179 * Extra button on ThinkingMouse
180 */
181 if (psmouse->type == PSMOUSE_THINKPS) {
182 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
183 /* Without this bit of weirdness moving up gives wildly high Y changes. */
184 packet[1] |= (packet[0] & 0x40) << 1;
185 }
186
187 /*
188 * Generic PS/2 Mouse
189 */
190
191 input_report_key(dev, BTN_LEFT, packet[0] & 1);
192 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
193 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
194
195 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
196 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
197
198 input_sync(dev);
199
200 return PSMOUSE_FULL_PACKET;
201 }
202
203 /*
204 * __psmouse_set_state() sets new psmouse state and resets all flags.
205 */
206
207 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
208 {
209 psmouse->state = new_state;
210 psmouse->pktcnt = psmouse->out_of_sync = 0;
211 psmouse->ps2dev.flags = 0;
212 psmouse->last = jiffies;
213 }
214
215
216 /*
217 * psmouse_set_state() sets new psmouse state and resets all flags and
218 * counters while holding serio lock so fighting with interrupt handler
219 * is not a concern.
220 */
221
222 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
223 {
224 serio_pause_rx(psmouse->ps2dev.serio);
225 __psmouse_set_state(psmouse, new_state);
226 serio_continue_rx(psmouse->ps2dev.serio);
227 }
228
229 /*
230 * psmouse_handle_byte() processes one byte of the input data stream
231 * by calling corresponding protocol handler.
232 */
233
234 static int psmouse_handle_byte(struct psmouse *psmouse, struct pt_regs *regs)
235 {
236 psmouse_ret_t rc = psmouse->protocol_handler(psmouse, regs);
237
238 switch (rc) {
239 case PSMOUSE_BAD_DATA:
240 if (psmouse->state == PSMOUSE_ACTIVATED) {
241 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
242 psmouse->name, psmouse->phys, psmouse->pktcnt);
243 if (++psmouse->out_of_sync == psmouse->resetafter) {
244 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
245 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
246 serio_reconnect(psmouse->ps2dev.serio);
247 return -1;
248 }
249 }
250 psmouse->pktcnt = 0;
251 break;
252
253 case PSMOUSE_FULL_PACKET:
254 psmouse->pktcnt = 0;
255 if (psmouse->out_of_sync) {
256 psmouse->out_of_sync = 0;
257 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
258 psmouse->name, psmouse->phys);
259 }
260 break;
261
262 case PSMOUSE_GOOD_DATA:
263 break;
264 }
265 return 0;
266 }
267
268 /*
269 * psmouse_interrupt() handles incoming characters, either passing them
270 * for normal processing or gathering them as command response.
271 */
272
273 static irqreturn_t psmouse_interrupt(struct serio *serio,
274 unsigned char data, unsigned int flags, struct pt_regs *regs)
275 {
276 struct psmouse *psmouse = serio_get_drvdata(serio);
277
278 if (psmouse->state == PSMOUSE_IGNORE)
279 goto out;
280
281 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
282 if (psmouse->state == PSMOUSE_ACTIVATED)
283 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
284 flags & SERIO_TIMEOUT ? " timeout" : "",
285 flags & SERIO_PARITY ? " bad parity" : "");
286 ps2_cmd_aborted(&psmouse->ps2dev);
287 goto out;
288 }
289
290 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
291 if (ps2_handle_ack(&psmouse->ps2dev, data))
292 goto out;
293
294 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
295 if (ps2_handle_response(&psmouse->ps2dev, data))
296 goto out;
297
298 if (psmouse->state <= PSMOUSE_RESYNCING)
299 goto out;
300
301 if (psmouse->state == PSMOUSE_ACTIVATED &&
302 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
303 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
304 psmouse->name, psmouse->phys, psmouse->pktcnt);
305 psmouse->badbyte = psmouse->packet[0];
306 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
307 queue_work(kpsmoused_wq, &psmouse->resync_work);
308 goto out;
309 }
310
311 psmouse->packet[psmouse->pktcnt++] = data;
312 /*
313 * Check if this is a new device announcement (0xAA 0x00)
314 */
315 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
316 if (psmouse->pktcnt == 1) {
317 psmouse->last = jiffies;
318 goto out;
319 }
320
321 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
322 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
323 serio_reconnect(serio);
324 goto out;
325 }
326 /*
327 * Not a new device, try processing first byte normally
328 */
329 psmouse->pktcnt = 1;
330 if (psmouse_handle_byte(psmouse, regs))
331 goto out;
332
333 psmouse->packet[psmouse->pktcnt++] = data;
334 }
335
336 /*
337 * See if we need to force resync because mouse was idle for too long
338 */
339 if (psmouse->state == PSMOUSE_ACTIVATED &&
340 psmouse->pktcnt == 1 && psmouse->resync_time &&
341 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
342 psmouse->badbyte = psmouse->packet[0];
343 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
344 queue_work(kpsmoused_wq, &psmouse->resync_work);
345 goto out;
346 }
347
348 psmouse->last = jiffies;
349 psmouse_handle_byte(psmouse, regs);
350
351 out:
352 return IRQ_HANDLED;
353 }
354
355
356 /*
357 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
358 * using sliced syntax, understood by advanced devices, such as Logitech
359 * or Synaptics touchpads. The command is encoded as:
360 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
361 * is the command.
362 */
363 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
364 {
365 int i;
366
367 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
368 return -1;
369
370 for (i = 6; i >= 0; i -= 2) {
371 unsigned char d = (command >> i) & 3;
372 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
373 return -1;
374 }
375
376 return 0;
377 }
378
379
380 /*
381 * psmouse_reset() resets the mouse into power-on state.
382 */
383 int psmouse_reset(struct psmouse *psmouse)
384 {
385 unsigned char param[2];
386
387 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
388 return -1;
389
390 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
391 return -1;
392
393 return 0;
394 }
395
396
397 /*
398 * Genius NetMouse magic init.
399 */
400 static int genius_detect(struct psmouse *psmouse, int set_properties)
401 {
402 struct ps2dev *ps2dev = &psmouse->ps2dev;
403 unsigned char param[4];
404
405 param[0] = 3;
406 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
407 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
408 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
409 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
410 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
411
412 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
413 return -1;
414
415 if (set_properties) {
416 set_bit(BTN_EXTRA, psmouse->dev->keybit);
417 set_bit(BTN_SIDE, psmouse->dev->keybit);
418 set_bit(REL_WHEEL, psmouse->dev->relbit);
419
420 psmouse->vendor = "Genius";
421 psmouse->name = "Mouse";
422 psmouse->pktsize = 4;
423 }
424
425 return 0;
426 }
427
428 /*
429 * IntelliMouse magic init.
430 */
431 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
432 {
433 struct ps2dev *ps2dev = &psmouse->ps2dev;
434 unsigned char param[2];
435
436 param[0] = 200;
437 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
438 param[0] = 100;
439 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
440 param[0] = 80;
441 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
442 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
443
444 if (param[0] != 3)
445 return -1;
446
447 if (set_properties) {
448 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
449 set_bit(REL_WHEEL, psmouse->dev->relbit);
450
451 if (!psmouse->vendor) psmouse->vendor = "Generic";
452 if (!psmouse->name) psmouse->name = "Wheel Mouse";
453 psmouse->pktsize = 4;
454 }
455
456 return 0;
457 }
458
459 /*
460 * Try IntelliMouse/Explorer magic init.
461 */
462 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
463 {
464 struct ps2dev *ps2dev = &psmouse->ps2dev;
465 unsigned char param[2];
466
467 intellimouse_detect(psmouse, 0);
468
469 param[0] = 200;
470 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
471 param[0] = 200;
472 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
473 param[0] = 80;
474 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
475 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
476
477 if (param[0] != 4)
478 return -1;
479
480 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
481 param[0] = 200;
482 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
483 param[0] = 80;
484 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
485 param[0] = 40;
486 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
487
488 if (set_properties) {
489 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
490 set_bit(REL_WHEEL, psmouse->dev->relbit);
491 set_bit(REL_HWHEEL, psmouse->dev->relbit);
492 set_bit(BTN_SIDE, psmouse->dev->keybit);
493 set_bit(BTN_EXTRA, psmouse->dev->keybit);
494
495 if (!psmouse->vendor) psmouse->vendor = "Generic";
496 if (!psmouse->name) psmouse->name = "Explorer Mouse";
497 psmouse->pktsize = 4;
498 }
499
500 return 0;
501 }
502
503 /*
504 * Kensington ThinkingMouse / ExpertMouse magic init.
505 */
506 static int thinking_detect(struct psmouse *psmouse, int set_properties)
507 {
508 struct ps2dev *ps2dev = &psmouse->ps2dev;
509 unsigned char param[2];
510 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
511 int i;
512
513 param[0] = 10;
514 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
515 param[0] = 0;
516 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
517 for (i = 0; i < ARRAY_SIZE(seq); i++) {
518 param[0] = seq[i];
519 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
520 }
521 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
522
523 if (param[0] != 2)
524 return -1;
525
526 if (set_properties) {
527 set_bit(BTN_EXTRA, psmouse->dev->keybit);
528
529 psmouse->vendor = "Kensington";
530 psmouse->name = "ThinkingMouse";
531 }
532
533 return 0;
534 }
535
536 /*
537 * Bare PS/2 protocol "detection". Always succeeds.
538 */
539 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
540 {
541 if (set_properties) {
542 if (!psmouse->vendor) psmouse->vendor = "Generic";
543 if (!psmouse->name) psmouse->name = "Mouse";
544 }
545
546 return 0;
547 }
548
549
550 /*
551 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
552 * the mouse may have.
553 */
554
555 static int psmouse_extensions(struct psmouse *psmouse,
556 unsigned int max_proto, int set_properties)
557 {
558 int synaptics_hardware = 0;
559
560 /*
561 * We always check for lifebook because it does not disturb mouse
562 * (it only checks DMI information).
563 */
564 if (lifebook_detect(psmouse, set_properties) == 0) {
565 if (max_proto > PSMOUSE_IMEX) {
566 if (!set_properties || lifebook_init(psmouse) == 0)
567 return PSMOUSE_LIFEBOOK;
568 }
569 }
570
571 /*
572 * Try Kensington ThinkingMouse (we try first, because synaptics probe
573 * upsets the thinkingmouse).
574 */
575
576 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
577 return PSMOUSE_THINKPS;
578
579 /*
580 * Try Synaptics TouchPad
581 */
582 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
583 synaptics_hardware = 1;
584
585 if (max_proto > PSMOUSE_IMEX) {
586 if (!set_properties || synaptics_init(psmouse) == 0)
587 return PSMOUSE_SYNAPTICS;
588 /*
589 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
590 * Unfortunately Logitech/Genius probes confuse some firmware versions so
591 * we'll have to skip them.
592 */
593 max_proto = PSMOUSE_IMEX;
594 }
595 /*
596 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
597 */
598 synaptics_reset(psmouse);
599 }
600
601 /*
602 * Try ALPS TouchPad
603 */
604 if (max_proto > PSMOUSE_IMEX) {
605 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
606 if (alps_detect(psmouse, set_properties) == 0) {
607 if (!set_properties || alps_init(psmouse) == 0)
608 return PSMOUSE_ALPS;
609 /*
610 * Init failed, try basic relative protocols
611 */
612 max_proto = PSMOUSE_IMEX;
613 }
614 }
615
616 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
617 return PSMOUSE_GENPS;
618
619 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
620 return PSMOUSE_PS2PP;
621
622 if (max_proto > PSMOUSE_IMEX && trackpoint_detect(psmouse, set_properties) == 0)
623 return PSMOUSE_TRACKPOINT;
624
625 /*
626 * Reset to defaults in case the device got confused by extended
627 * protocol probes. Note that we do full reset becuase some mice
628 * put themselves to sleep when see PSMOUSE_RESET_DIS.
629 */
630 psmouse_reset(psmouse);
631
632 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
633 return PSMOUSE_IMEX;
634
635 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
636 return PSMOUSE_IMPS;
637
638 /*
639 * Okay, all failed, we have a standard mouse here. The number of the buttons
640 * is still a question, though. We assume 3.
641 */
642 ps2bare_detect(psmouse, set_properties);
643
644 if (synaptics_hardware) {
645 /*
646 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
647 * We need to reset the touchpad because if there is a track point on the
648 * pass through port it could get disabled while probing for protocol
649 * extensions.
650 */
651 psmouse_reset(psmouse);
652 }
653
654 return PSMOUSE_PS2;
655 }
656
657 static const struct psmouse_protocol psmouse_protocols[] = {
658 {
659 .type = PSMOUSE_PS2,
660 .name = "PS/2",
661 .alias = "bare",
662 .maxproto = 1,
663 .detect = ps2bare_detect,
664 },
665 {
666 .type = PSMOUSE_PS2PP,
667 .name = "PS2++",
668 .alias = "logitech",
669 .detect = ps2pp_init,
670 },
671 {
672 .type = PSMOUSE_THINKPS,
673 .name = "ThinkPS/2",
674 .alias = "thinkps",
675 .detect = thinking_detect,
676 },
677 {
678 .type = PSMOUSE_GENPS,
679 .name = "GenPS/2",
680 .alias = "genius",
681 .detect = genius_detect,
682 },
683 {
684 .type = PSMOUSE_IMPS,
685 .name = "ImPS/2",
686 .alias = "imps",
687 .maxproto = 1,
688 .detect = intellimouse_detect,
689 },
690 {
691 .type = PSMOUSE_IMEX,
692 .name = "ImExPS/2",
693 .alias = "exps",
694 .maxproto = 1,
695 .detect = im_explorer_detect,
696 },
697 {
698 .type = PSMOUSE_SYNAPTICS,
699 .name = "SynPS/2",
700 .alias = "synaptics",
701 .detect = synaptics_detect,
702 .init = synaptics_init,
703 },
704 {
705 .type = PSMOUSE_ALPS,
706 .name = "AlpsPS/2",
707 .alias = "alps",
708 .detect = alps_detect,
709 .init = alps_init,
710 },
711 {
712 .type = PSMOUSE_LIFEBOOK,
713 .name = "LBPS/2",
714 .alias = "lifebook",
715 .init = lifebook_init,
716 },
717 {
718 .type = PSMOUSE_TRACKPOINT,
719 .name = "TPPS/2",
720 .alias = "trackpoint",
721 .detect = trackpoint_detect,
722 },
723 {
724 .type = PSMOUSE_AUTO,
725 .name = "auto",
726 .alias = "any",
727 .maxproto = 1,
728 },
729 };
730
731 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
732 {
733 int i;
734
735 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
736 if (psmouse_protocols[i].type == type)
737 return &psmouse_protocols[i];
738
739 WARN_ON(1);
740 return &psmouse_protocols[0];
741 }
742
743 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
744 {
745 const struct psmouse_protocol *p;
746 int i;
747
748 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
749 p = &psmouse_protocols[i];
750
751 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
752 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
753 return &psmouse_protocols[i];
754 }
755
756 return NULL;
757 }
758
759
760 /*
761 * psmouse_probe() probes for a PS/2 mouse.
762 */
763
764 static int psmouse_probe(struct psmouse *psmouse)
765 {
766 struct ps2dev *ps2dev = &psmouse->ps2dev;
767 unsigned char param[2];
768
769 /*
770 * First, we check if it's a mouse. It should send 0x00 or 0x03
771 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
772 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
773 * ID queries, probably due to a firmware bug.
774 */
775
776 param[0] = 0xa5;
777 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
778 return -1;
779
780 if (param[0] != 0x00 && param[0] != 0x03 &&
781 param[0] != 0x04 && param[0] != 0xff)
782 return -1;
783
784 /*
785 * Then we reset and disable the mouse so that it doesn't generate events.
786 */
787
788 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
789 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
790
791 return 0;
792 }
793
794 /*
795 * Here we set the mouse resolution.
796 */
797
798 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
799 {
800 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
801 unsigned char p;
802
803 if (resolution == 0 || resolution > 200)
804 resolution = 200;
805
806 p = params[resolution / 50];
807 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
808 psmouse->resolution = 25 << p;
809 }
810
811 /*
812 * Here we set the mouse report rate.
813 */
814
815 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
816 {
817 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
818 unsigned char r;
819 int i = 0;
820
821 while (rates[i] > rate) i++;
822 r = rates[i];
823 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
824 psmouse->rate = r;
825 }
826
827 /*
828 * psmouse_initialize() initializes the mouse to a sane state.
829 */
830
831 static void psmouse_initialize(struct psmouse *psmouse)
832 {
833 /*
834 * We set the mouse into streaming mode.
835 */
836
837 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
838
839 /*
840 * We set the mouse report rate, resolution and scaling.
841 */
842
843 if (psmouse_max_proto != PSMOUSE_PS2) {
844 psmouse->set_rate(psmouse, psmouse->rate);
845 psmouse->set_resolution(psmouse, psmouse->resolution);
846 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
847 }
848 }
849
850 /*
851 * psmouse_activate() enables the mouse so that we get motion reports from it.
852 */
853
854 static void psmouse_activate(struct psmouse *psmouse)
855 {
856 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
857 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
858 psmouse->ps2dev.serio->phys);
859
860 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
861 }
862
863
864 /*
865 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
866 * reports from it unless we explicitely request it.
867 */
868
869 static void psmouse_deactivate(struct psmouse *psmouse)
870 {
871 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
872 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
873 psmouse->ps2dev.serio->phys);
874
875 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
876 }
877
878 /*
879 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
880 */
881
882 static int psmouse_poll(struct psmouse *psmouse)
883 {
884 return ps2_command(&psmouse->ps2dev, psmouse->packet,
885 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
886 }
887
888
889 /*
890 * psmouse_resync() attempts to re-validate current protocol.
891 */
892
893 static void psmouse_resync(void *p)
894 {
895 struct psmouse *psmouse = p, *parent = NULL;
896 struct serio *serio = psmouse->ps2dev.serio;
897 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
898 int failed = 0, enabled = 0;
899 int i;
900
901 mutex_lock(&psmouse_mutex);
902
903 if (psmouse->state != PSMOUSE_RESYNCING)
904 goto out;
905
906 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
907 parent = serio_get_drvdata(serio->parent);
908 psmouse_deactivate(parent);
909 }
910
911 /*
912 * Some mice don't ACK commands sent while they are in the middle of
913 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
914 * instead of ps2_command() which would wait for 200ms for an ACK
915 * that may never come.
916 * As an additional quirk ALPS touchpads may not only forget to ACK
917 * disable command but will stop reporting taps, so if we see that
918 * mouse at least once ACKs disable we will do full reconnect if ACK
919 * is missing.
920 */
921 psmouse->num_resyncs++;
922
923 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
924 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
925 failed = 1;
926 } else
927 psmouse->acks_disable_command = 1;
928
929 /*
930 * Poll the mouse. If it was reset the packet will be shorter than
931 * psmouse->pktsize and ps2_command will fail. We do not expect and
932 * do not handle scenario when mouse "upgrades" its protocol while
933 * disconnected since it would require additional delay. If we ever
934 * see a mouse that does it we'll adjust the code.
935 */
936 if (!failed) {
937 if (psmouse->poll(psmouse))
938 failed = 1;
939 else {
940 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
941 for (i = 0; i < psmouse->pktsize; i++) {
942 psmouse->pktcnt++;
943 rc = psmouse->protocol_handler(psmouse, NULL);
944 if (rc != PSMOUSE_GOOD_DATA)
945 break;
946 }
947 if (rc != PSMOUSE_FULL_PACKET)
948 failed = 1;
949 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
950 }
951 }
952 /*
953 * Now try to enable mouse. We try to do that even if poll failed and also
954 * repeat our attempts 5 times, otherwise we may be left out with disabled
955 * mouse.
956 */
957 for (i = 0; i < 5; i++) {
958 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
959 enabled = 1;
960 break;
961 }
962 msleep(200);
963 }
964
965 if (!enabled) {
966 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
967 psmouse->ps2dev.serio->phys);
968 failed = 1;
969 }
970
971 if (failed) {
972 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
973 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
974 serio_reconnect(serio);
975 } else
976 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
977
978 if (parent)
979 psmouse_activate(parent);
980 out:
981 mutex_unlock(&psmouse_mutex);
982 }
983
984 /*
985 * psmouse_cleanup() resets the mouse into power-on state.
986 */
987
988 static void psmouse_cleanup(struct serio *serio)
989 {
990 struct psmouse *psmouse = serio_get_drvdata(serio);
991
992 psmouse_reset(psmouse);
993 }
994
995 /*
996 * psmouse_disconnect() closes and frees.
997 */
998
999 static void psmouse_disconnect(struct serio *serio)
1000 {
1001 struct psmouse *psmouse, *parent = NULL;
1002
1003 psmouse = serio_get_drvdata(serio);
1004
1005 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1006
1007 mutex_lock(&psmouse_mutex);
1008
1009 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1010
1011 /* make sure we don't have a resync in progress */
1012 mutex_unlock(&psmouse_mutex);
1013 flush_workqueue(kpsmoused_wq);
1014 mutex_lock(&psmouse_mutex);
1015
1016 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1017 parent = serio_get_drvdata(serio->parent);
1018 psmouse_deactivate(parent);
1019 }
1020
1021 if (psmouse->disconnect)
1022 psmouse->disconnect(psmouse);
1023
1024 if (parent && parent->pt_deactivate)
1025 parent->pt_deactivate(parent);
1026
1027 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1028
1029 serio_close(serio);
1030 serio_set_drvdata(serio, NULL);
1031 input_unregister_device(psmouse->dev);
1032 kfree(psmouse);
1033
1034 if (parent)
1035 psmouse_activate(parent);
1036
1037 mutex_unlock(&psmouse_mutex);
1038 }
1039
1040 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto)
1041 {
1042 struct input_dev *input_dev = psmouse->dev;
1043
1044 input_dev->private = psmouse;
1045 input_dev->cdev.dev = &psmouse->ps2dev.serio->dev;
1046
1047 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
1048 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
1049 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
1050
1051 psmouse->set_rate = psmouse_set_rate;
1052 psmouse->set_resolution = psmouse_set_resolution;
1053 psmouse->poll = psmouse_poll;
1054 psmouse->protocol_handler = psmouse_process_byte;
1055 psmouse->pktsize = 3;
1056
1057 if (proto && (proto->detect || proto->init)) {
1058 if (proto->detect && proto->detect(psmouse, 1) < 0)
1059 return -1;
1060
1061 if (proto->init && proto->init(psmouse) < 0)
1062 return -1;
1063
1064 psmouse->type = proto->type;
1065 }
1066 else
1067 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1068
1069 /*
1070 * If mouse's packet size is 3 there is no point in polling the
1071 * device in hopes to detect protocol reset - we won't get less
1072 * than 3 bytes response anyhow.
1073 */
1074 if (psmouse->pktsize == 3)
1075 psmouse->resync_time = 0;
1076
1077 /*
1078 * Some smart KVMs fake response to POLL command returning just
1079 * 3 bytes and messing up our resync logic, so if initial poll
1080 * fails we won't try polling the device anymore. Hopefully
1081 * such KVM will maintain initially selected protocol.
1082 */
1083 if (psmouse->resync_time && psmouse->poll(psmouse))
1084 psmouse->resync_time = 0;
1085
1086 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1087 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1088
1089 input_dev->name = psmouse->devname;
1090 input_dev->phys = psmouse->phys;
1091 input_dev->id.bustype = BUS_I8042;
1092 input_dev->id.vendor = 0x0002;
1093 input_dev->id.product = psmouse->type;
1094 input_dev->id.version = psmouse->model;
1095
1096 return 0;
1097 }
1098
1099 /*
1100 * psmouse_connect() is a callback from the serio module when
1101 * an unhandled serio port is found.
1102 */
1103 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1104 {
1105 struct psmouse *psmouse, *parent = NULL;
1106 struct input_dev *input_dev;
1107 int retval = -ENOMEM;
1108
1109 mutex_lock(&psmouse_mutex);
1110
1111 /*
1112 * If this is a pass-through port deactivate parent so the device
1113 * connected to this port can be successfully identified
1114 */
1115 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1116 parent = serio_get_drvdata(serio->parent);
1117 psmouse_deactivate(parent);
1118 }
1119
1120 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1121 input_dev = input_allocate_device();
1122 if (!psmouse || !input_dev)
1123 goto out;
1124
1125 ps2_init(&psmouse->ps2dev, serio);
1126 INIT_WORK(&psmouse->resync_work, psmouse_resync, psmouse);
1127 psmouse->dev = input_dev;
1128 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1129
1130 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1131
1132 serio_set_drvdata(serio, psmouse);
1133
1134 retval = serio_open(serio, drv);
1135 if (retval)
1136 goto out;
1137
1138 if (psmouse_probe(psmouse) < 0) {
1139 serio_close(serio);
1140 retval = -ENODEV;
1141 goto out;
1142 }
1143
1144 psmouse->rate = psmouse_rate;
1145 psmouse->resolution = psmouse_resolution;
1146 psmouse->resetafter = psmouse_resetafter;
1147 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1148 psmouse->smartscroll = psmouse_smartscroll;
1149
1150 psmouse_switch_protocol(psmouse, NULL);
1151
1152 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1153 psmouse_initialize(psmouse);
1154
1155 input_register_device(psmouse->dev);
1156
1157 if (parent && parent->pt_activate)
1158 parent->pt_activate(parent);
1159
1160 sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1161
1162 psmouse_activate(psmouse);
1163
1164 retval = 0;
1165
1166 out:
1167 if (retval) {
1168 serio_set_drvdata(serio, NULL);
1169 input_free_device(input_dev);
1170 kfree(psmouse);
1171 }
1172
1173 /* If this is a pass-through port the parent needs to be re-activated */
1174 if (parent)
1175 psmouse_activate(parent);
1176
1177 mutex_unlock(&psmouse_mutex);
1178 return retval;
1179 }
1180
1181
1182 static int psmouse_reconnect(struct serio *serio)
1183 {
1184 struct psmouse *psmouse = serio_get_drvdata(serio);
1185 struct psmouse *parent = NULL;
1186 struct serio_driver *drv = serio->drv;
1187 int rc = -1;
1188
1189 if (!drv || !psmouse) {
1190 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1191 return -1;
1192 }
1193
1194 mutex_lock(&psmouse_mutex);
1195
1196 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1197 parent = serio_get_drvdata(serio->parent);
1198 psmouse_deactivate(parent);
1199 }
1200
1201 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1202
1203 if (psmouse->reconnect) {
1204 if (psmouse->reconnect(psmouse))
1205 goto out;
1206 } else if (psmouse_probe(psmouse) < 0 ||
1207 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1208 goto out;
1209
1210 /* ok, the device type (and capabilities) match the old one,
1211 * we can continue using it, complete intialization
1212 */
1213 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1214
1215 psmouse_initialize(psmouse);
1216
1217 if (parent && parent->pt_activate)
1218 parent->pt_activate(parent);
1219
1220 psmouse_activate(psmouse);
1221 rc = 0;
1222
1223 out:
1224 /* If this is a pass-through port the parent waits to be activated */
1225 if (parent)
1226 psmouse_activate(parent);
1227
1228 mutex_unlock(&psmouse_mutex);
1229 return rc;
1230 }
1231
1232 static struct serio_device_id psmouse_serio_ids[] = {
1233 {
1234 .type = SERIO_8042,
1235 .proto = SERIO_ANY,
1236 .id = SERIO_ANY,
1237 .extra = SERIO_ANY,
1238 },
1239 {
1240 .type = SERIO_PS_PSTHRU,
1241 .proto = SERIO_ANY,
1242 .id = SERIO_ANY,
1243 .extra = SERIO_ANY,
1244 },
1245 { 0 }
1246 };
1247
1248 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1249
1250 static struct serio_driver psmouse_drv = {
1251 .driver = {
1252 .name = "psmouse",
1253 },
1254 .description = DRIVER_DESC,
1255 .id_table = psmouse_serio_ids,
1256 .interrupt = psmouse_interrupt,
1257 .connect = psmouse_connect,
1258 .reconnect = psmouse_reconnect,
1259 .disconnect = psmouse_disconnect,
1260 .cleanup = psmouse_cleanup,
1261 };
1262
1263 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1264 char *buf)
1265 {
1266 struct serio *serio = to_serio_port(dev);
1267 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1268 struct psmouse *psmouse;
1269 int retval;
1270
1271 retval = serio_pin_driver(serio);
1272 if (retval)
1273 return retval;
1274
1275 if (serio->drv != &psmouse_drv) {
1276 retval = -ENODEV;
1277 goto out;
1278 }
1279
1280 psmouse = serio_get_drvdata(serio);
1281
1282 retval = attr->show(psmouse, attr->data, buf);
1283
1284 out:
1285 serio_unpin_driver(serio);
1286 return retval;
1287 }
1288
1289 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1290 const char *buf, size_t count)
1291 {
1292 struct serio *serio = to_serio_port(dev);
1293 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1294 struct psmouse *psmouse, *parent = NULL;
1295 int retval;
1296
1297 retval = serio_pin_driver(serio);
1298 if (retval)
1299 return retval;
1300
1301 if (serio->drv != &psmouse_drv) {
1302 retval = -ENODEV;
1303 goto out_unpin;
1304 }
1305
1306 retval = mutex_lock_interruptible(&psmouse_mutex);
1307 if (retval)
1308 goto out_unpin;
1309
1310 psmouse = serio_get_drvdata(serio);
1311
1312 if (psmouse->state == PSMOUSE_IGNORE) {
1313 retval = -ENODEV;
1314 goto out_unlock;
1315 }
1316
1317 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1318 parent = serio_get_drvdata(serio->parent);
1319 psmouse_deactivate(parent);
1320 }
1321
1322 psmouse_deactivate(psmouse);
1323
1324 retval = attr->set(psmouse, attr->data, buf, count);
1325
1326 if (retval != -ENODEV)
1327 psmouse_activate(psmouse);
1328
1329 if (parent)
1330 psmouse_activate(parent);
1331
1332 out_unlock:
1333 mutex_unlock(&psmouse_mutex);
1334 out_unpin:
1335 serio_unpin_driver(serio);
1336 return retval;
1337 }
1338
1339 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1340 {
1341 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1342
1343 return sprintf(buf, "%lu\n", *field);
1344 }
1345
1346 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1347 {
1348 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1349 unsigned long value;
1350 char *rest;
1351
1352 value = simple_strtoul(buf, &rest, 10);
1353 if (*rest)
1354 return -EINVAL;
1355
1356 *field = value;
1357
1358 return count;
1359 }
1360
1361 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1362 {
1363 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1364 }
1365
1366 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1367 {
1368 struct serio *serio = psmouse->ps2dev.serio;
1369 struct psmouse *parent = NULL;
1370 struct input_dev *new_dev;
1371 const struct psmouse_protocol *proto;
1372 int retry = 0;
1373
1374 if (!(proto = psmouse_protocol_by_name(buf, count)))
1375 return -EINVAL;
1376
1377 if (psmouse->type == proto->type)
1378 return count;
1379
1380 if (!(new_dev = input_allocate_device()))
1381 return -ENOMEM;
1382
1383 while (serio->child) {
1384 if (++retry > 3) {
1385 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1386 input_free_device(new_dev);
1387 return -EIO;
1388 }
1389
1390 mutex_unlock(&psmouse_mutex);
1391 serio_unpin_driver(serio);
1392 serio_unregister_child_port(serio);
1393 serio_pin_driver_uninterruptible(serio);
1394 mutex_lock(&psmouse_mutex);
1395
1396 if (serio->drv != &psmouse_drv) {
1397 input_free_device(new_dev);
1398 return -ENODEV;
1399 }
1400
1401 if (psmouse->type == proto->type) {
1402 input_free_device(new_dev);
1403 return count; /* switched by other thread */
1404 }
1405 }
1406
1407 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1408 parent = serio_get_drvdata(serio->parent);
1409 if (parent->pt_deactivate)
1410 parent->pt_deactivate(parent);
1411 }
1412
1413 if (psmouse->disconnect)
1414 psmouse->disconnect(psmouse);
1415
1416 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1417 input_unregister_device(psmouse->dev);
1418
1419 psmouse->dev = new_dev;
1420 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1421
1422 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1423 psmouse_reset(psmouse);
1424 /* default to PSMOUSE_PS2 */
1425 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1426 }
1427
1428 psmouse_initialize(psmouse);
1429 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1430
1431 input_register_device(psmouse->dev);
1432
1433 if (parent && parent->pt_activate)
1434 parent->pt_activate(parent);
1435
1436 return count;
1437 }
1438
1439 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1440 {
1441 unsigned long value;
1442 char *rest;
1443
1444 value = simple_strtoul(buf, &rest, 10);
1445 if (*rest)
1446 return -EINVAL;
1447
1448 psmouse->set_rate(psmouse, value);
1449 return count;
1450 }
1451
1452 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1453 {
1454 unsigned long value;
1455 char *rest;
1456
1457 value = simple_strtoul(buf, &rest, 10);
1458 if (*rest)
1459 return -EINVAL;
1460
1461 psmouse->set_resolution(psmouse, value);
1462 return count;
1463 }
1464
1465
1466 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1467 {
1468 const struct psmouse_protocol *proto;
1469
1470 if (!val)
1471 return -EINVAL;
1472
1473 proto = psmouse_protocol_by_name(val, strlen(val));
1474
1475 if (!proto || !proto->maxproto)
1476 return -EINVAL;
1477
1478 *((unsigned int *)kp->arg) = proto->type;
1479
1480 return 0;
1481 }
1482
1483 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1484 {
1485 int type = *((unsigned int *)kp->arg);
1486
1487 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1488 }
1489
1490 static int __init psmouse_init(void)
1491 {
1492 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1493 if (!kpsmoused_wq) {
1494 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1495 return -ENOMEM;
1496 }
1497
1498 serio_register_driver(&psmouse_drv);
1499
1500 return 0;
1501 }
1502
1503 static void __exit psmouse_exit(void)
1504 {
1505 serio_unregister_driver(&psmouse_drv);
1506 destroy_workqueue(kpsmoused_wq);
1507 }
1508
1509 module_init(psmouse_init);
1510 module_exit(psmouse_exit);
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