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Input: psmouse - reset harder during probe
[deliverable/linux.git] / drivers / input / mouse / psmouse-base.c
1 /*
2 * PS/2 mouse driver
3 *
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2003-2004 Dmitry Torokhov
6 */
7
8 /*
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
12 */
13
14 #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 #include "touchkit_ps2.h"
32
33 #define DRIVER_DESC "PS/2 mouse driver"
34
35 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
36 MODULE_DESCRIPTION(DRIVER_DESC);
37 MODULE_LICENSE("GPL");
38
39 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
40 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
41 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
42 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
43 #define param_set_proto_abbrev psmouse_set_maxproto
44 #define param_get_proto_abbrev psmouse_get_maxproto
45 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
46 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
47
48 static unsigned int psmouse_resolution = 200;
49 module_param_named(resolution, psmouse_resolution, uint, 0644);
50 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
51
52 static unsigned int psmouse_rate = 100;
53 module_param_named(rate, psmouse_rate, uint, 0644);
54 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
55
56 static unsigned int psmouse_smartscroll = 1;
57 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
58 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
59
60 static unsigned int psmouse_resetafter = 5;
61 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
62 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
63
64 static unsigned int psmouse_resync_time;
65 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
66 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
67
68 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
69 NULL,
70 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
71 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
72 (void *) offsetof(struct psmouse, rate),
73 psmouse_show_int_attr, psmouse_attr_set_rate);
74 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
75 (void *) offsetof(struct psmouse, resolution),
76 psmouse_show_int_attr, psmouse_attr_set_resolution);
77 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
78 (void *) offsetof(struct psmouse, resetafter),
79 psmouse_show_int_attr, psmouse_set_int_attr);
80 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
81 (void *) offsetof(struct psmouse, resync_time),
82 psmouse_show_int_attr, psmouse_set_int_attr);
83
84 static struct attribute *psmouse_attributes[] = {
85 &psmouse_attr_protocol.dattr.attr,
86 &psmouse_attr_rate.dattr.attr,
87 &psmouse_attr_resolution.dattr.attr,
88 &psmouse_attr_resetafter.dattr.attr,
89 &psmouse_attr_resync_time.dattr.attr,
90 NULL
91 };
92
93 static struct attribute_group psmouse_attribute_group = {
94 .attrs = psmouse_attributes,
95 };
96
97 /*
98 * psmouse_mutex protects all operations changing state of mouse
99 * (connecting, disconnecting, changing rate or resolution via
100 * sysfs). We could use a per-device semaphore but since there
101 * rarely more than one PS/2 mouse connected and since semaphore
102 * is taken in "slow" paths it is not worth it.
103 */
104 static DEFINE_MUTEX(psmouse_mutex);
105
106 static struct workqueue_struct *kpsmoused_wq;
107
108 struct psmouse_protocol {
109 enum psmouse_type type;
110 const char *name;
111 const char *alias;
112 int maxproto;
113 int (*detect)(struct psmouse *, int);
114 int (*init)(struct psmouse *);
115 };
116
117 /*
118 * psmouse_process_byte() analyzes the PS/2 data stream and reports
119 * relevant events to the input module once full packet has arrived.
120 */
121
122 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
123 {
124 struct input_dev *dev = psmouse->dev;
125 unsigned char *packet = psmouse->packet;
126
127 if (psmouse->pktcnt < psmouse->pktsize)
128 return PSMOUSE_GOOD_DATA;
129
130 /*
131 * Full packet accumulated, process it
132 */
133
134 /*
135 * Scroll wheel on IntelliMice, scroll buttons on NetMice
136 */
137
138 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
139 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
140
141 /*
142 * Scroll wheel and buttons on IntelliMouse Explorer
143 */
144
145 if (psmouse->type == PSMOUSE_IMEX) {
146 switch (packet[3] & 0xC0) {
147 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
148 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
149 break;
150 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
151 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
152 break;
153 case 0x00:
154 case 0xC0:
155 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
156 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
157 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
158 break;
159 }
160 }
161
162 /*
163 * Extra buttons on Genius NewNet 3D
164 */
165
166 if (psmouse->type == PSMOUSE_GENPS) {
167 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
168 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
169 }
170
171 /*
172 * Extra button on ThinkingMouse
173 */
174 if (psmouse->type == PSMOUSE_THINKPS) {
175 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
176 /* Without this bit of weirdness moving up gives wildly high Y changes. */
177 packet[1] |= (packet[0] & 0x40) << 1;
178 }
179
180 /*
181 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
182 * byte.
183 */
184 if (psmouse->type == PSMOUSE_CORTRON) {
185 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
186 packet[0] |= 0x08;
187 }
188
189 /*
190 * Generic PS/2 Mouse
191 */
192
193 input_report_key(dev, BTN_LEFT, packet[0] & 1);
194 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
195 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
196
197 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
198 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
199
200 input_sync(dev);
201
202 return PSMOUSE_FULL_PACKET;
203 }
204
205 /*
206 * __psmouse_set_state() sets new psmouse state and resets all flags.
207 */
208
209 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
210 {
211 psmouse->state = new_state;
212 psmouse->pktcnt = psmouse->out_of_sync = 0;
213 psmouse->ps2dev.flags = 0;
214 psmouse->last = jiffies;
215 }
216
217
218 /*
219 * psmouse_set_state() sets new psmouse state and resets all flags and
220 * counters while holding serio lock so fighting with interrupt handler
221 * is not a concern.
222 */
223
224 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
225 {
226 serio_pause_rx(psmouse->ps2dev.serio);
227 __psmouse_set_state(psmouse, new_state);
228 serio_continue_rx(psmouse->ps2dev.serio);
229 }
230
231 /*
232 * psmouse_handle_byte() processes one byte of the input data stream
233 * by calling corresponding protocol handler.
234 */
235
236 static int psmouse_handle_byte(struct psmouse *psmouse)
237 {
238 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
239
240 switch (rc) {
241 case PSMOUSE_BAD_DATA:
242 if (psmouse->state == PSMOUSE_ACTIVATED) {
243 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
244 psmouse->name, psmouse->phys, psmouse->pktcnt);
245 if (++psmouse->out_of_sync == psmouse->resetafter) {
246 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
247 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
248 serio_reconnect(psmouse->ps2dev.serio);
249 return -1;
250 }
251 }
252 psmouse->pktcnt = 0;
253 break;
254
255 case PSMOUSE_FULL_PACKET:
256 psmouse->pktcnt = 0;
257 if (psmouse->out_of_sync) {
258 psmouse->out_of_sync = 0;
259 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
260 psmouse->name, psmouse->phys);
261 }
262 break;
263
264 case PSMOUSE_GOOD_DATA:
265 break;
266 }
267 return 0;
268 }
269
270 /*
271 * psmouse_interrupt() handles incoming characters, either passing them
272 * for normal processing or gathering them as command response.
273 */
274
275 static irqreturn_t psmouse_interrupt(struct serio *serio,
276 unsigned char data, unsigned int flags)
277 {
278 struct psmouse *psmouse = serio_get_drvdata(serio);
279
280 if (psmouse->state == PSMOUSE_IGNORE)
281 goto out;
282
283 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
284 if (psmouse->state == PSMOUSE_ACTIVATED)
285 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
286 flags & SERIO_TIMEOUT ? " timeout" : "",
287 flags & SERIO_PARITY ? " bad parity" : "");
288 ps2_cmd_aborted(&psmouse->ps2dev);
289 goto out;
290 }
291
292 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
293 if (ps2_handle_ack(&psmouse->ps2dev, data))
294 goto out;
295
296 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
297 if (ps2_handle_response(&psmouse->ps2dev, data))
298 goto out;
299
300 if (psmouse->state <= PSMOUSE_RESYNCING)
301 goto out;
302
303 if (psmouse->state == PSMOUSE_ACTIVATED &&
304 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
305 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
306 psmouse->name, psmouse->phys, psmouse->pktcnt);
307 psmouse->badbyte = psmouse->packet[0];
308 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
309 queue_work(kpsmoused_wq, &psmouse->resync_work);
310 goto out;
311 }
312
313 psmouse->packet[psmouse->pktcnt++] = data;
314 /*
315 * Check if this is a new device announcement (0xAA 0x00)
316 */
317 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
318 if (psmouse->pktcnt == 1) {
319 psmouse->last = jiffies;
320 goto out;
321 }
322
323 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
324 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
325 serio_reconnect(serio);
326 goto out;
327 }
328 /*
329 * Not a new device, try processing first byte normally
330 */
331 psmouse->pktcnt = 1;
332 if (psmouse_handle_byte(psmouse))
333 goto out;
334
335 psmouse->packet[psmouse->pktcnt++] = data;
336 }
337
338 /*
339 * See if we need to force resync because mouse was idle for too long
340 */
341 if (psmouse->state == PSMOUSE_ACTIVATED &&
342 psmouse->pktcnt == 1 && psmouse->resync_time &&
343 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
344 psmouse->badbyte = psmouse->packet[0];
345 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
346 queue_work(kpsmoused_wq, &psmouse->resync_work);
347 goto out;
348 }
349
350 psmouse->last = jiffies;
351 psmouse_handle_byte(psmouse);
352
353 out:
354 return IRQ_HANDLED;
355 }
356
357
358 /*
359 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
360 * using sliced syntax, understood by advanced devices, such as Logitech
361 * or Synaptics touchpads. The command is encoded as:
362 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
363 * is the command.
364 */
365 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
366 {
367 int i;
368
369 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
370 return -1;
371
372 for (i = 6; i >= 0; i -= 2) {
373 unsigned char d = (command >> i) & 3;
374 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
375 return -1;
376 }
377
378 return 0;
379 }
380
381
382 /*
383 * psmouse_reset() resets the mouse into power-on state.
384 */
385 int psmouse_reset(struct psmouse *psmouse)
386 {
387 unsigned char param[2];
388
389 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
390 return -1;
391
392 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
393 return -1;
394
395 return 0;
396 }
397
398
399 /*
400 * Genius NetMouse magic init.
401 */
402 static int genius_detect(struct psmouse *psmouse, int set_properties)
403 {
404 struct ps2dev *ps2dev = &psmouse->ps2dev;
405 unsigned char param[4];
406
407 param[0] = 3;
408 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
409 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
410 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
411 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
412 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
413
414 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
415 return -1;
416
417 if (set_properties) {
418 set_bit(BTN_EXTRA, psmouse->dev->keybit);
419 set_bit(BTN_SIDE, psmouse->dev->keybit);
420 set_bit(REL_WHEEL, psmouse->dev->relbit);
421
422 psmouse->vendor = "Genius";
423 psmouse->name = "Mouse";
424 psmouse->pktsize = 4;
425 }
426
427 return 0;
428 }
429
430 /*
431 * IntelliMouse magic init.
432 */
433 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
434 {
435 struct ps2dev *ps2dev = &psmouse->ps2dev;
436 unsigned char param[2];
437
438 param[0] = 200;
439 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
440 param[0] = 100;
441 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
442 param[0] = 80;
443 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
444 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
445
446 if (param[0] != 3)
447 return -1;
448
449 if (set_properties) {
450 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
451 set_bit(REL_WHEEL, psmouse->dev->relbit);
452
453 if (!psmouse->vendor) psmouse->vendor = "Generic";
454 if (!psmouse->name) psmouse->name = "Wheel Mouse";
455 psmouse->pktsize = 4;
456 }
457
458 return 0;
459 }
460
461 /*
462 * Try IntelliMouse/Explorer magic init.
463 */
464 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
465 {
466 struct ps2dev *ps2dev = &psmouse->ps2dev;
467 unsigned char param[2];
468
469 intellimouse_detect(psmouse, 0);
470
471 param[0] = 200;
472 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
473 param[0] = 200;
474 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
475 param[0] = 80;
476 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
477 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
478
479 if (param[0] != 4)
480 return -1;
481
482 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
483 param[0] = 200;
484 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
485 param[0] = 80;
486 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
487 param[0] = 40;
488 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
489
490 if (set_properties) {
491 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
492 set_bit(REL_WHEEL, psmouse->dev->relbit);
493 set_bit(REL_HWHEEL, psmouse->dev->relbit);
494 set_bit(BTN_SIDE, psmouse->dev->keybit);
495 set_bit(BTN_EXTRA, psmouse->dev->keybit);
496
497 if (!psmouse->vendor) psmouse->vendor = "Generic";
498 if (!psmouse->name) psmouse->name = "Explorer Mouse";
499 psmouse->pktsize = 4;
500 }
501
502 return 0;
503 }
504
505 /*
506 * Kensington ThinkingMouse / ExpertMouse magic init.
507 */
508 static int thinking_detect(struct psmouse *psmouse, int set_properties)
509 {
510 struct ps2dev *ps2dev = &psmouse->ps2dev;
511 unsigned char param[2];
512 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
513 int i;
514
515 param[0] = 10;
516 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
517 param[0] = 0;
518 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
519 for (i = 0; i < ARRAY_SIZE(seq); i++) {
520 param[0] = seq[i];
521 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
522 }
523 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
524
525 if (param[0] != 2)
526 return -1;
527
528 if (set_properties) {
529 set_bit(BTN_EXTRA, psmouse->dev->keybit);
530
531 psmouse->vendor = "Kensington";
532 psmouse->name = "ThinkingMouse";
533 }
534
535 return 0;
536 }
537
538 /*
539 * Bare PS/2 protocol "detection". Always succeeds.
540 */
541 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
542 {
543 if (set_properties) {
544 if (!psmouse->vendor) psmouse->vendor = "Generic";
545 if (!psmouse->name) psmouse->name = "Mouse";
546 }
547
548 return 0;
549 }
550
551 /*
552 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
553 * must be forced by sysfs protocol writing.
554 */
555 static int cortron_detect(struct psmouse *psmouse, int set_properties)
556 {
557 if (set_properties) {
558 psmouse->vendor = "Cortron";
559 psmouse->name = "PS/2 Trackball";
560 set_bit(BTN_SIDE, psmouse->dev->keybit);
561 }
562
563 return 0;
564 }
565
566 /*
567 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
568 * the mouse may have.
569 */
570
571 static int psmouse_extensions(struct psmouse *psmouse,
572 unsigned int max_proto, int set_properties)
573 {
574 int synaptics_hardware = 0;
575
576 /*
577 * We always check for lifebook because it does not disturb mouse
578 * (it only checks DMI information).
579 */
580 if (lifebook_detect(psmouse, set_properties) == 0) {
581 if (max_proto > PSMOUSE_IMEX) {
582 if (!set_properties || lifebook_init(psmouse) == 0)
583 return PSMOUSE_LIFEBOOK;
584 }
585 }
586
587 /*
588 * Try Kensington ThinkingMouse (we try first, because synaptics probe
589 * upsets the thinkingmouse).
590 */
591
592 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
593 return PSMOUSE_THINKPS;
594
595 /*
596 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
597 * support is disabled in config - we need to know if it is synaptics so we
598 * can reset it properly after probing for intellimouse.
599 */
600 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
601 synaptics_hardware = 1;
602
603 if (max_proto > PSMOUSE_IMEX) {
604 if (!set_properties || synaptics_init(psmouse) == 0)
605 return PSMOUSE_SYNAPTICS;
606 /*
607 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
608 * Unfortunately Logitech/Genius probes confuse some firmware versions so
609 * we'll have to skip them.
610 */
611 max_proto = PSMOUSE_IMEX;
612 }
613 /*
614 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
615 */
616 synaptics_reset(psmouse);
617 }
618
619 /*
620 * Try ALPS TouchPad
621 */
622 if (max_proto > PSMOUSE_IMEX) {
623 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
624 if (alps_detect(psmouse, set_properties) == 0) {
625 if (!set_properties || alps_init(psmouse) == 0)
626 return PSMOUSE_ALPS;
627 /*
628 * Init failed, try basic relative protocols
629 */
630 max_proto = PSMOUSE_IMEX;
631 }
632 }
633
634 if (max_proto > PSMOUSE_IMEX) {
635
636 if (genius_detect(psmouse, set_properties) == 0)
637 return PSMOUSE_GENPS;
638
639 if (ps2pp_init(psmouse, set_properties) == 0)
640 return PSMOUSE_PS2PP;
641
642 if (trackpoint_detect(psmouse, set_properties) == 0)
643 return PSMOUSE_TRACKPOINT;
644
645 if (touchkit_ps2_detect(psmouse, set_properties) == 0)
646 return PSMOUSE_TOUCHKIT_PS2;
647 }
648
649 /*
650 * Reset to defaults in case the device got confused by extended
651 * protocol probes. Note that we follow up with full reset because
652 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
653 */
654 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
655 psmouse_reset(psmouse);
656
657 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
658 return PSMOUSE_IMEX;
659
660 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
661 return PSMOUSE_IMPS;
662
663 /*
664 * Okay, all failed, we have a standard mouse here. The number of the buttons
665 * is still a question, though. We assume 3.
666 */
667 ps2bare_detect(psmouse, set_properties);
668
669 if (synaptics_hardware) {
670 /*
671 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
672 * We need to reset the touchpad because if there is a track point on the
673 * pass through port it could get disabled while probing for protocol
674 * extensions.
675 */
676 psmouse_reset(psmouse);
677 }
678
679 return PSMOUSE_PS2;
680 }
681
682 static const struct psmouse_protocol psmouse_protocols[] = {
683 {
684 .type = PSMOUSE_PS2,
685 .name = "PS/2",
686 .alias = "bare",
687 .maxproto = 1,
688 .detect = ps2bare_detect,
689 },
690 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
691 {
692 .type = PSMOUSE_PS2PP,
693 .name = "PS2++",
694 .alias = "logitech",
695 .detect = ps2pp_init,
696 },
697 #endif
698 {
699 .type = PSMOUSE_THINKPS,
700 .name = "ThinkPS/2",
701 .alias = "thinkps",
702 .detect = thinking_detect,
703 },
704 {
705 .type = PSMOUSE_GENPS,
706 .name = "GenPS/2",
707 .alias = "genius",
708 .detect = genius_detect,
709 },
710 {
711 .type = PSMOUSE_IMPS,
712 .name = "ImPS/2",
713 .alias = "imps",
714 .maxproto = 1,
715 .detect = intellimouse_detect,
716 },
717 {
718 .type = PSMOUSE_IMEX,
719 .name = "ImExPS/2",
720 .alias = "exps",
721 .maxproto = 1,
722 .detect = im_explorer_detect,
723 },
724 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
725 {
726 .type = PSMOUSE_SYNAPTICS,
727 .name = "SynPS/2",
728 .alias = "synaptics",
729 .detect = synaptics_detect,
730 .init = synaptics_init,
731 },
732 #endif
733 #ifdef CONFIG_MOUSE_PS2_ALPS
734 {
735 .type = PSMOUSE_ALPS,
736 .name = "AlpsPS/2",
737 .alias = "alps",
738 .detect = alps_detect,
739 .init = alps_init,
740 },
741 #endif
742 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
743 {
744 .type = PSMOUSE_LIFEBOOK,
745 .name = "LBPS/2",
746 .alias = "lifebook",
747 .init = lifebook_init,
748 },
749 #endif
750 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
751 {
752 .type = PSMOUSE_TRACKPOINT,
753 .name = "TPPS/2",
754 .alias = "trackpoint",
755 .detect = trackpoint_detect,
756 },
757 #endif
758 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
759 {
760 .type = PSMOUSE_TOUCHKIT_PS2,
761 .name = "touchkitPS/2",
762 .alias = "touchkit",
763 .detect = touchkit_ps2_detect,
764 },
765 #endif
766 {
767 .type = PSMOUSE_CORTRON,
768 .name = "CortronPS/2",
769 .alias = "cortps",
770 .detect = cortron_detect,
771 },
772 {
773 .type = PSMOUSE_AUTO,
774 .name = "auto",
775 .alias = "any",
776 .maxproto = 1,
777 },
778 };
779
780 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
781 {
782 int i;
783
784 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
785 if (psmouse_protocols[i].type == type)
786 return &psmouse_protocols[i];
787
788 WARN_ON(1);
789 return &psmouse_protocols[0];
790 }
791
792 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
793 {
794 const struct psmouse_protocol *p;
795 int i;
796
797 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
798 p = &psmouse_protocols[i];
799
800 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
801 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
802 return &psmouse_protocols[i];
803 }
804
805 return NULL;
806 }
807
808
809 /*
810 * psmouse_probe() probes for a PS/2 mouse.
811 */
812
813 static int psmouse_probe(struct psmouse *psmouse)
814 {
815 struct ps2dev *ps2dev = &psmouse->ps2dev;
816 unsigned char param[2];
817
818 /*
819 * First, we check if it's a mouse. It should send 0x00 or 0x03
820 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
821 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
822 * ID queries, probably due to a firmware bug.
823 */
824
825 param[0] = 0xa5;
826 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
827 return -1;
828
829 if (param[0] != 0x00 && param[0] != 0x03 &&
830 param[0] != 0x04 && param[0] != 0xff)
831 return -1;
832
833 /*
834 * Then we reset and disable the mouse so that it doesn't generate events.
835 */
836
837 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
838 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
839
840 return 0;
841 }
842
843 /*
844 * Here we set the mouse resolution.
845 */
846
847 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
848 {
849 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
850 unsigned char p;
851
852 if (resolution == 0 || resolution > 200)
853 resolution = 200;
854
855 p = params[resolution / 50];
856 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
857 psmouse->resolution = 25 << p;
858 }
859
860 /*
861 * Here we set the mouse report rate.
862 */
863
864 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
865 {
866 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
867 unsigned char r;
868 int i = 0;
869
870 while (rates[i] > rate) i++;
871 r = rates[i];
872 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
873 psmouse->rate = r;
874 }
875
876 /*
877 * psmouse_initialize() initializes the mouse to a sane state.
878 */
879
880 static void psmouse_initialize(struct psmouse *psmouse)
881 {
882 /*
883 * We set the mouse report rate, resolution and scaling.
884 */
885
886 if (psmouse_max_proto != PSMOUSE_PS2) {
887 psmouse->set_rate(psmouse, psmouse->rate);
888 psmouse->set_resolution(psmouse, psmouse->resolution);
889 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
890 }
891 }
892
893 /*
894 * psmouse_activate() enables the mouse so that we get motion reports from it.
895 */
896
897 static void psmouse_activate(struct psmouse *psmouse)
898 {
899 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
900 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
901 psmouse->ps2dev.serio->phys);
902
903 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
904 }
905
906
907 /*
908 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
909 * reports from it unless we explicitely request it.
910 */
911
912 static void psmouse_deactivate(struct psmouse *psmouse)
913 {
914 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
915 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
916 psmouse->ps2dev.serio->phys);
917
918 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
919 }
920
921 /*
922 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
923 */
924
925 static int psmouse_poll(struct psmouse *psmouse)
926 {
927 return ps2_command(&psmouse->ps2dev, psmouse->packet,
928 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
929 }
930
931
932 /*
933 * psmouse_resync() attempts to re-validate current protocol.
934 */
935
936 static void psmouse_resync(struct work_struct *work)
937 {
938 struct psmouse *parent = NULL, *psmouse =
939 container_of(work, struct psmouse, resync_work);
940 struct serio *serio = psmouse->ps2dev.serio;
941 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
942 int failed = 0, enabled = 0;
943 int i;
944
945 mutex_lock(&psmouse_mutex);
946
947 if (psmouse->state != PSMOUSE_RESYNCING)
948 goto out;
949
950 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
951 parent = serio_get_drvdata(serio->parent);
952 psmouse_deactivate(parent);
953 }
954
955 /*
956 * Some mice don't ACK commands sent while they are in the middle of
957 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
958 * instead of ps2_command() which would wait for 200ms for an ACK
959 * that may never come.
960 * As an additional quirk ALPS touchpads may not only forget to ACK
961 * disable command but will stop reporting taps, so if we see that
962 * mouse at least once ACKs disable we will do full reconnect if ACK
963 * is missing.
964 */
965 psmouse->num_resyncs++;
966
967 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
968 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
969 failed = 1;
970 } else
971 psmouse->acks_disable_command = 1;
972
973 /*
974 * Poll the mouse. If it was reset the packet will be shorter than
975 * psmouse->pktsize and ps2_command will fail. We do not expect and
976 * do not handle scenario when mouse "upgrades" its protocol while
977 * disconnected since it would require additional delay. If we ever
978 * see a mouse that does it we'll adjust the code.
979 */
980 if (!failed) {
981 if (psmouse->poll(psmouse))
982 failed = 1;
983 else {
984 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
985 for (i = 0; i < psmouse->pktsize; i++) {
986 psmouse->pktcnt++;
987 rc = psmouse->protocol_handler(psmouse);
988 if (rc != PSMOUSE_GOOD_DATA)
989 break;
990 }
991 if (rc != PSMOUSE_FULL_PACKET)
992 failed = 1;
993 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
994 }
995 }
996 /*
997 * Now try to enable mouse. We try to do that even if poll failed and also
998 * repeat our attempts 5 times, otherwise we may be left out with disabled
999 * mouse.
1000 */
1001 for (i = 0; i < 5; i++) {
1002 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1003 enabled = 1;
1004 break;
1005 }
1006 msleep(200);
1007 }
1008
1009 if (!enabled) {
1010 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
1011 psmouse->ps2dev.serio->phys);
1012 failed = 1;
1013 }
1014
1015 if (failed) {
1016 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1017 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
1018 serio_reconnect(serio);
1019 } else
1020 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1021
1022 if (parent)
1023 psmouse_activate(parent);
1024 out:
1025 mutex_unlock(&psmouse_mutex);
1026 }
1027
1028 /*
1029 * psmouse_cleanup() resets the mouse into power-on state.
1030 */
1031
1032 static void psmouse_cleanup(struct serio *serio)
1033 {
1034 struct psmouse *psmouse = serio_get_drvdata(serio);
1035 struct psmouse *parent = NULL;
1036
1037 mutex_lock(&psmouse_mutex);
1038
1039 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1040 parent = serio_get_drvdata(serio->parent);
1041 psmouse_deactivate(parent);
1042 }
1043
1044 psmouse_deactivate(psmouse);
1045
1046 if (psmouse->cleanup)
1047 psmouse->cleanup(psmouse);
1048
1049 psmouse_reset(psmouse);
1050
1051 /*
1052 * Some boxes, such as HP nx7400, get terribly confused if mouse
1053 * is not fully enabled before suspending/shutting down.
1054 */
1055 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1056
1057 if (parent) {
1058 if (parent->pt_deactivate)
1059 parent->pt_deactivate(parent);
1060
1061 psmouse_activate(parent);
1062 }
1063
1064 mutex_unlock(&psmouse_mutex);
1065 }
1066
1067 /*
1068 * psmouse_disconnect() closes and frees.
1069 */
1070
1071 static void psmouse_disconnect(struct serio *serio)
1072 {
1073 struct psmouse *psmouse, *parent = NULL;
1074
1075 psmouse = serio_get_drvdata(serio);
1076
1077 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1078
1079 mutex_lock(&psmouse_mutex);
1080
1081 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1082
1083 /* make sure we don't have a resync in progress */
1084 mutex_unlock(&psmouse_mutex);
1085 flush_workqueue(kpsmoused_wq);
1086 mutex_lock(&psmouse_mutex);
1087
1088 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1089 parent = serio_get_drvdata(serio->parent);
1090 psmouse_deactivate(parent);
1091 }
1092
1093 if (psmouse->disconnect)
1094 psmouse->disconnect(psmouse);
1095
1096 if (parent && parent->pt_deactivate)
1097 parent->pt_deactivate(parent);
1098
1099 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1100
1101 serio_close(serio);
1102 serio_set_drvdata(serio, NULL);
1103 input_unregister_device(psmouse->dev);
1104 kfree(psmouse);
1105
1106 if (parent)
1107 psmouse_activate(parent);
1108
1109 mutex_unlock(&psmouse_mutex);
1110 }
1111
1112 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto)
1113 {
1114 struct input_dev *input_dev = psmouse->dev;
1115
1116 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1117
1118 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
1119 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
1120 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
1121
1122 psmouse->set_rate = psmouse_set_rate;
1123 psmouse->set_resolution = psmouse_set_resolution;
1124 psmouse->poll = psmouse_poll;
1125 psmouse->protocol_handler = psmouse_process_byte;
1126 psmouse->pktsize = 3;
1127
1128 if (proto && (proto->detect || proto->init)) {
1129 if (proto->detect && proto->detect(psmouse, 1) < 0)
1130 return -1;
1131
1132 if (proto->init && proto->init(psmouse) < 0)
1133 return -1;
1134
1135 psmouse->type = proto->type;
1136 }
1137 else
1138 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1139
1140 /*
1141 * If mouse's packet size is 3 there is no point in polling the
1142 * device in hopes to detect protocol reset - we won't get less
1143 * than 3 bytes response anyhow.
1144 */
1145 if (psmouse->pktsize == 3)
1146 psmouse->resync_time = 0;
1147
1148 /*
1149 * Some smart KVMs fake response to POLL command returning just
1150 * 3 bytes and messing up our resync logic, so if initial poll
1151 * fails we won't try polling the device anymore. Hopefully
1152 * such KVM will maintain initially selected protocol.
1153 */
1154 if (psmouse->resync_time && psmouse->poll(psmouse))
1155 psmouse->resync_time = 0;
1156
1157 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1158 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1159
1160 input_dev->name = psmouse->devname;
1161 input_dev->phys = psmouse->phys;
1162 input_dev->id.bustype = BUS_I8042;
1163 input_dev->id.vendor = 0x0002;
1164 input_dev->id.product = psmouse->type;
1165 input_dev->id.version = psmouse->model;
1166
1167 return 0;
1168 }
1169
1170 /*
1171 * psmouse_connect() is a callback from the serio module when
1172 * an unhandled serio port is found.
1173 */
1174 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1175 {
1176 struct psmouse *psmouse, *parent = NULL;
1177 struct input_dev *input_dev;
1178 int retval = 0, error = -ENOMEM;
1179
1180 mutex_lock(&psmouse_mutex);
1181
1182 /*
1183 * If this is a pass-through port deactivate parent so the device
1184 * connected to this port can be successfully identified
1185 */
1186 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1187 parent = serio_get_drvdata(serio->parent);
1188 psmouse_deactivate(parent);
1189 }
1190
1191 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1192 input_dev = input_allocate_device();
1193 if (!psmouse || !input_dev)
1194 goto err_free;
1195
1196 ps2_init(&psmouse->ps2dev, serio);
1197 INIT_WORK(&psmouse->resync_work, psmouse_resync);
1198 psmouse->dev = input_dev;
1199 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1200
1201 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1202
1203 serio_set_drvdata(serio, psmouse);
1204
1205 error = serio_open(serio, drv);
1206 if (error)
1207 goto err_clear_drvdata;
1208
1209 if (psmouse_probe(psmouse) < 0) {
1210 error = -ENODEV;
1211 goto err_close_serio;
1212 }
1213
1214 psmouse->rate = psmouse_rate;
1215 psmouse->resolution = psmouse_resolution;
1216 psmouse->resetafter = psmouse_resetafter;
1217 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1218 psmouse->smartscroll = psmouse_smartscroll;
1219
1220 psmouse_switch_protocol(psmouse, NULL);
1221
1222 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1223 psmouse_initialize(psmouse);
1224
1225 error = input_register_device(psmouse->dev);
1226 if (error)
1227 goto err_protocol_disconnect;
1228
1229 if (parent && parent->pt_activate)
1230 parent->pt_activate(parent);
1231
1232 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1233 if (error)
1234 goto err_pt_deactivate;
1235
1236 psmouse_activate(psmouse);
1237
1238 out:
1239 /* If this is a pass-through port the parent needs to be re-activated */
1240 if (parent)
1241 psmouse_activate(parent);
1242
1243 mutex_unlock(&psmouse_mutex);
1244 return retval;
1245
1246 err_pt_deactivate:
1247 if (parent && parent->pt_deactivate)
1248 parent->pt_deactivate(parent);
1249 err_protocol_disconnect:
1250 if (psmouse->disconnect)
1251 psmouse->disconnect(psmouse);
1252 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1253 err_close_serio:
1254 serio_close(serio);
1255 err_clear_drvdata:
1256 serio_set_drvdata(serio, NULL);
1257 err_free:
1258 input_free_device(input_dev);
1259 kfree(psmouse);
1260
1261 retval = error;
1262 goto out;
1263 }
1264
1265
1266 static int psmouse_reconnect(struct serio *serio)
1267 {
1268 struct psmouse *psmouse = serio_get_drvdata(serio);
1269 struct psmouse *parent = NULL;
1270 struct serio_driver *drv = serio->drv;
1271 int rc = -1;
1272
1273 if (!drv || !psmouse) {
1274 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1275 return -1;
1276 }
1277
1278 mutex_lock(&psmouse_mutex);
1279
1280 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1281 parent = serio_get_drvdata(serio->parent);
1282 psmouse_deactivate(parent);
1283 }
1284
1285 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1286
1287 if (psmouse->reconnect) {
1288 if (psmouse->reconnect(psmouse))
1289 goto out;
1290 } else if (psmouse_probe(psmouse) < 0 ||
1291 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1292 goto out;
1293
1294 /* ok, the device type (and capabilities) match the old one,
1295 * we can continue using it, complete intialization
1296 */
1297 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1298
1299 psmouse_initialize(psmouse);
1300
1301 if (parent && parent->pt_activate)
1302 parent->pt_activate(parent);
1303
1304 psmouse_activate(psmouse);
1305 rc = 0;
1306
1307 out:
1308 /* If this is a pass-through port the parent waits to be activated */
1309 if (parent)
1310 psmouse_activate(parent);
1311
1312 mutex_unlock(&psmouse_mutex);
1313 return rc;
1314 }
1315
1316 static struct serio_device_id psmouse_serio_ids[] = {
1317 {
1318 .type = SERIO_8042,
1319 .proto = SERIO_ANY,
1320 .id = SERIO_ANY,
1321 .extra = SERIO_ANY,
1322 },
1323 {
1324 .type = SERIO_PS_PSTHRU,
1325 .proto = SERIO_ANY,
1326 .id = SERIO_ANY,
1327 .extra = SERIO_ANY,
1328 },
1329 { 0 }
1330 };
1331
1332 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1333
1334 static struct serio_driver psmouse_drv = {
1335 .driver = {
1336 .name = "psmouse",
1337 },
1338 .description = DRIVER_DESC,
1339 .id_table = psmouse_serio_ids,
1340 .interrupt = psmouse_interrupt,
1341 .connect = psmouse_connect,
1342 .reconnect = psmouse_reconnect,
1343 .disconnect = psmouse_disconnect,
1344 .cleanup = psmouse_cleanup,
1345 };
1346
1347 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1348 char *buf)
1349 {
1350 struct serio *serio = to_serio_port(dev);
1351 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1352 struct psmouse *psmouse;
1353 int retval;
1354
1355 retval = serio_pin_driver(serio);
1356 if (retval)
1357 return retval;
1358
1359 if (serio->drv != &psmouse_drv) {
1360 retval = -ENODEV;
1361 goto out;
1362 }
1363
1364 psmouse = serio_get_drvdata(serio);
1365
1366 retval = attr->show(psmouse, attr->data, buf);
1367
1368 out:
1369 serio_unpin_driver(serio);
1370 return retval;
1371 }
1372
1373 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1374 const char *buf, size_t count)
1375 {
1376 struct serio *serio = to_serio_port(dev);
1377 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1378 struct psmouse *psmouse, *parent = NULL;
1379 int retval;
1380
1381 retval = serio_pin_driver(serio);
1382 if (retval)
1383 return retval;
1384
1385 if (serio->drv != &psmouse_drv) {
1386 retval = -ENODEV;
1387 goto out_unpin;
1388 }
1389
1390 retval = mutex_lock_interruptible(&psmouse_mutex);
1391 if (retval)
1392 goto out_unpin;
1393
1394 psmouse = serio_get_drvdata(serio);
1395
1396 if (psmouse->state == PSMOUSE_IGNORE) {
1397 retval = -ENODEV;
1398 goto out_unlock;
1399 }
1400
1401 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1402 parent = serio_get_drvdata(serio->parent);
1403 psmouse_deactivate(parent);
1404 }
1405
1406 psmouse_deactivate(psmouse);
1407
1408 retval = attr->set(psmouse, attr->data, buf, count);
1409
1410 if (retval != -ENODEV)
1411 psmouse_activate(psmouse);
1412
1413 if (parent)
1414 psmouse_activate(parent);
1415
1416 out_unlock:
1417 mutex_unlock(&psmouse_mutex);
1418 out_unpin:
1419 serio_unpin_driver(serio);
1420 return retval;
1421 }
1422
1423 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1424 {
1425 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1426
1427 return sprintf(buf, "%u\n", *field);
1428 }
1429
1430 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1431 {
1432 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1433 unsigned long value;
1434 char *rest;
1435
1436 value = simple_strtoul(buf, &rest, 10);
1437 if (*rest)
1438 return -EINVAL;
1439
1440 if ((unsigned int)value != value)
1441 return -EINVAL;
1442
1443 *field = value;
1444
1445 return count;
1446 }
1447
1448 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1449 {
1450 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1451 }
1452
1453 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1454 {
1455 struct serio *serio = psmouse->ps2dev.serio;
1456 struct psmouse *parent = NULL;
1457 struct input_dev *old_dev, *new_dev;
1458 const struct psmouse_protocol *proto, *old_proto;
1459 int error;
1460 int retry = 0;
1461
1462 proto = psmouse_protocol_by_name(buf, count);
1463 if (!proto)
1464 return -EINVAL;
1465
1466 if (psmouse->type == proto->type)
1467 return count;
1468
1469 new_dev = input_allocate_device();
1470 if (!new_dev)
1471 return -ENOMEM;
1472
1473 while (serio->child) {
1474 if (++retry > 3) {
1475 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1476 input_free_device(new_dev);
1477 return -EIO;
1478 }
1479
1480 mutex_unlock(&psmouse_mutex);
1481 serio_unpin_driver(serio);
1482 serio_unregister_child_port(serio);
1483 serio_pin_driver_uninterruptible(serio);
1484 mutex_lock(&psmouse_mutex);
1485
1486 if (serio->drv != &psmouse_drv) {
1487 input_free_device(new_dev);
1488 return -ENODEV;
1489 }
1490
1491 if (psmouse->type == proto->type) {
1492 input_free_device(new_dev);
1493 return count; /* switched by other thread */
1494 }
1495 }
1496
1497 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1498 parent = serio_get_drvdata(serio->parent);
1499 if (parent->pt_deactivate)
1500 parent->pt_deactivate(parent);
1501 }
1502
1503 old_dev = psmouse->dev;
1504 old_proto = psmouse_protocol_by_type(psmouse->type);
1505
1506 if (psmouse->disconnect)
1507 psmouse->disconnect(psmouse);
1508
1509 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1510
1511 psmouse->dev = new_dev;
1512 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1513
1514 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1515 psmouse_reset(psmouse);
1516 /* default to PSMOUSE_PS2 */
1517 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1518 }
1519
1520 psmouse_initialize(psmouse);
1521 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1522
1523 error = input_register_device(psmouse->dev);
1524 if (error) {
1525 if (psmouse->disconnect)
1526 psmouse->disconnect(psmouse);
1527
1528 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1529 input_free_device(new_dev);
1530 psmouse->dev = old_dev;
1531 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1532 psmouse_switch_protocol(psmouse, old_proto);
1533 psmouse_initialize(psmouse);
1534 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1535
1536 return error;
1537 }
1538
1539 input_unregister_device(old_dev);
1540
1541 if (parent && parent->pt_activate)
1542 parent->pt_activate(parent);
1543
1544 return count;
1545 }
1546
1547 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1548 {
1549 unsigned long value;
1550 char *rest;
1551
1552 value = simple_strtoul(buf, &rest, 10);
1553 if (*rest)
1554 return -EINVAL;
1555
1556 psmouse->set_rate(psmouse, value);
1557 return count;
1558 }
1559
1560 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1561 {
1562 unsigned long value;
1563 char *rest;
1564
1565 value = simple_strtoul(buf, &rest, 10);
1566 if (*rest)
1567 return -EINVAL;
1568
1569 psmouse->set_resolution(psmouse, value);
1570 return count;
1571 }
1572
1573
1574 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1575 {
1576 const struct psmouse_protocol *proto;
1577
1578 if (!val)
1579 return -EINVAL;
1580
1581 proto = psmouse_protocol_by_name(val, strlen(val));
1582
1583 if (!proto || !proto->maxproto)
1584 return -EINVAL;
1585
1586 *((unsigned int *)kp->arg) = proto->type;
1587
1588 return 0;
1589 }
1590
1591 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1592 {
1593 int type = *((unsigned int *)kp->arg);
1594
1595 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1596 }
1597
1598 static int __init psmouse_init(void)
1599 {
1600 int err;
1601
1602 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1603 if (!kpsmoused_wq) {
1604 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1605 return -ENOMEM;
1606 }
1607
1608 err = serio_register_driver(&psmouse_drv);
1609 if (err)
1610 destroy_workqueue(kpsmoused_wq);
1611
1612 return err;
1613 }
1614
1615 static void __exit psmouse_exit(void)
1616 {
1617 serio_unregister_driver(&psmouse_drv);
1618 destroy_workqueue(kpsmoused_wq);
1619 }
1620
1621 module_init(psmouse_init);
1622 module_exit(psmouse_exit);
Linux kernel - Deliverables
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